Patent Description:
With the development of wireless charging technologies, a growing number of electronic devices have a wireless charging function. To charge an electronic device, a user may directly place the electronic device on a charging device. Compared with conventional charging technologies that require the user to insert the charging cable into the electronic device, the wireless charging technology simplifies the operations required for the user to charge the electronic device and improves user experience.

A transmitting coil is arranged on the charging device, and a receiving coil is arranged on the electronic device. When an offset between a center point of the transmitting coil and a center point of the receiving coil is less than a specific value, the receiving coil can receive magnetic field energy sent by the transmitting coil, that is, charging can be implemented. Maximum charging efficiency is achieved when the center point of the transmitting coil is aligned with the center point of the receiving coil. Generally, the size of the electronic device is greater than that of the charging device. When the user normally places the electronic device on the charging device, the offset between the center point of the transmitting coil and the center point of the receiving coil is not large in the horizontal direction. However, due to the coil design, the offset between the center point of the transmitting coil and the center point of the receiving coil is relatively large in the longitudinal direction, affecting the charging efficiency. <CIT> discloses a method for adjusting a coil position includes: acquiring position offset indication information between a transmitting coil in a power transmitting device and a receiving coil in a power receiving device; wherein the power transmitting device is configured to wirelessly charge the power receiving device, and the position offset indication information is used to reflect a position offset between the transmitting coil and the receiving coil; and adjusting a position of the transmitting coil according to the position offset indication information. <CIT> relates to wireless charging device and system.

Embodiments of this application provide a coil alignment method and a charging system, to implement alignment of a transmitting coil with a receiving coil in a longitudinal direction, thereby improving the charging efficiency.

According to a first aspect, the invention of this application provides a coil alignment method, applicable to an electronic device in accordance with appended claim <NUM>.

In a possible implementation, the coil adjustment information includes the coil offset information, and the obtaining, by the electronic device, coil adjustment information includes: obtaining, by the electronic device, a coil identifier of a coil that establishes communication with the electronic device on the charging device; determining, by the electronic device, the first transmitting coil according to the coil identifier; and determining, by the electronic device, the coil offset information according to the first transmitting coil.

In a possible implementation, the determining, by the electronic device, the coil offset information according to the first transmitting coil includes: obtaining, by the electronic device, a first distance, the first distance being a distance from a center point of the first transmitting coil to a preset limiting edge; obtaining, by the electronic device, a second distance, the second distance being a distance from a center point of the first receiving coil to the preset limiting edge; and determining, by the electronic device, the coil offset information according to the first distance and the second distance.

In a possible implementation, the determining, by the electronic device, the coil offset information according to the first distance and the second distance includes: obtaining, by the electronic device, a result of a subtraction operation performed on the first distance and the second distance; determining, by the electronic device, an offset direction of the first transmitting coil relative to the first receiving coil depending on whether the result of the subtraction operation is a positive or negative value; and determining, by the electronic device, an offset distance of the first transmitting coil relative to the first receiving coil according to a value of the result of the subtraction operation, the coil offset information including the offset direction and the offset distance.

In a possible implementation, the obtaining, by the electronic device, a second distance includes: obtaining, by the electronic device, a placement posture of the electronic device; and determining, by the electronic device, the second distance according to the placement posture.

In a possible implementation, the determining, by the electronic device, the second distance according to the placement posture includes: using, if the placement posture is vertical placement with a first side facing upward, a distance from the center point of the first receiving coil to a second side as the second distance; using, if the placement posture is vertical placement with the second side facing upward, a distance from the center point of the first receiving coil to the first side as the second distance; using, if the placement posture is horizontal placement with a third side facing upward, a distance from the center point of the first receiving coil to a fourth side as the second distance; or using, if the placement posture is horizontal placement with the fourth side facing upward, a distance from the center point of the first receiving coil to the third side as the second distance,.

the first side being a side at which an earpiece hole is located, the second side being a side opposite to the first side, the third side being a side at which a power key is located, and the fourth side being a side opposite to the third side.

In a possible implementation, the first transmitting coil includes an upper coil and a lower coil, the first receiving coil includes an upper coil and a lower coil, the coil adjustment information includes the coil offset information, and the obtaining, by the electronic device, coil adjustment information includes: obtaining, by the electronic device, the placement posture of the electronic device; obtaining, if the placement posture is vertical placement with the first side facing upward, offset information of an upper coil on the charging device relative to an upper coil on the electronic device and offset information of a lower coil on the charging device relative to a lower coil on the electronic device; or obtaining, if the placement posture is vertical placement with the second side facing upward, offset information of the upper coil on the charging device relative to the lower coil on the electronic device and offset information of the lower coil on the charging device relative to the upper coil on the electronic device.

In a possible implementation, the at least one transmitting coil includes an upper coil and a lower coil, the at least one receiving coil includes an upper coil and a lower coil, the first transmitting coil is a lower coil, the coil adjustment information includes the bottom plate rotation information, and the obtaining, by the electronic device, coil adjustment information includes: obtaining, by the electronic device, the placement posture of the electronic device; and determining, by the electronic device, the bottom plate rotation information according to the placement posture of the electronic device and the first receiving coil.

In a possible implementation, the determining, by the electronic device, the bottom plate rotation information according to the placement posture of the electronic device and the first receiving coil includes determining a bottom plate rotation direction as clockwise if the first receiving coil is an upper coil on the electronic device, and the placement posture is horizontal placement with the third side facing upward; determining the bottom plate rotation direction as counterclockwise if the first receiving coil is the upper coil on the electronic device, and the placement posture is horizontal placement with the fourth side facing upward; determining the bottom plate rotation direction as counterclockwise if the first receiving coil is a lower coil on the electronic device, and the placement posture is horizontal placement with the third side facing upward; or determining the bottom plate rotation direction as clockwise if the first receiving coil is the lower coil on the electronic device, and the placement posture is horizontal placement with the fourth side facing upward, the bottom plate rotation information including the bottom plate rotation direction.

According to a second aspect, the invention of this application provides a coil alignment method, applicable to a charging device in accordance with appended claim <NUM>.

In a possible implementation, the device information includes a coil identifier of a coil that establishes communication with the electronic device on the charging device, and the coil identifier is used by the electronic device to determine the first transmitting coil according to the coil identifier and determine the coil offset information according to the first transmitting coil.

According to a third aspect, the invention of this application provides an electronic device in accordance with appended claim <NUM>.

According to a fourth aspect, the invention of this application provides a charging device in accordance with appended claim <NUM>.

In a possible implementation, the charging device in the fourth aspect further includes: a first driving component. The first driving component is configured to drive the bottom plate to move. The processor is configured to control, according to the control instruction, the first driving component to work, to move the bottom plate under the action of the first driving component.

In a possible implementation, the first driving component includes: a first motor, a first gear, and a movable component engaged with the first gear. The first gear is mounted on the first motor. The movable component is fixed to the bottom plate. The first gear is configured to rotate under the action of the first motor, and the movable component is configured to move under the drive of the first gear, to move the bottom plate.

In a possible implementation, the charging device in the fourth aspect further includes: a second driving component. The second driving component includes: a second motor and a second gear. The second gear is fixed to the bottom plate, and the second gear is configured to rotate under the action of the second motor, to rotate the bottom plate.

According to the coil alignment method and the charging system provided in the embodiments of this application, a transmitting coil can be aligned with a receiving coil in a longitudinal direction, to improve the charging efficiency.

<FIG> is an application scenario diagram according to an embodiment of this application. An application scenario shown in <FIG> relates to a charging system. The charging system includes: an electronic device <NUM> and a charging device <NUM>. A transmitting coil is arranged on the charging device <NUM>, and a receiving coil is arranged on the electronic device <NUM>. When a user places the electronic device <NUM> on the charging device <NUM>, the transmitting coil is coupled to the receiving coil by using an electromagnetic field to implement wireless transmission of electric energy.

<FIG> is a schematic structural diagram of an electronic device <NUM> according to an embodiment of this application. As shown in <FIG>, the electronic device <NUM> may include: a receiving coil <NUM>, a sensor module <NUM>, a processor <NUM>, a memory <NUM>, and a battery <NUM>. The sensor module <NUM> may include: a direction sensor <NUM>, a magnetometer <NUM>, an accelerometer <NUM>, and a gyroscope <NUM>.

The receiving coil <NUM> is configured to receive magnetic field energy transmitted by the transmitting coil on the charging device <NUM> and convert the magnetic field energy into electric energy, to charge the battery <NUM>. The receiving coil <NUM> is further configured to send an instruction to the charging device <NUM> or receive an instruction sent by the charging device <NUM>, so that the transmitting coil on the charging device <NUM> can move and/or rotate, to align a center point of the transmitting coil with a center point of the receiving coil <NUM>, thereby improving the charging efficiency of the charging device <NUM>. The instruction may be transmitted through coupling between the receiving coil <NUM> and the transmitting coil.

It should be noted that the electronic device <NUM> shown in <FIG> includes only one receiving coil <NUM>, which is merely an example. In another embodiment, the electronic device <NUM> may include two or more receiving coils <NUM>. The structure shown in <FIG> does not constitute a limitation on this embodiment of this application.

The direction sensor <NUM>, the magnetometer <NUM>, the accelerometer <NUM>, and the gyroscope <NUM> are configured to send measured values to a processor <NUM>, so that the processor <NUM> determines a placement posture of the electronic device <NUM> according to the measured values of the direction sensor <NUM>, the magnetometer <NUM>, the accelerometer <NUM>, and the gyroscope <NUM>. It may be understood that <FIG> is merely an example, and the placement posture of the electronic device <NUM> may alternatively be determined by using another component. This is not limited in this embodiment of this application.

The processor <NUM> may include one or more processing units. For example, the processor <NUM> may include an application processor (application processor, AP), a modem processor, a graphics processing unit (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, a display process unit (display process unit, DPU), and/or a neural-network processing unit (neural-network processing unit, NPU). Different processing units may be independent components, or may be integrated into one or more processors. In some embodiments, the electronic device <NUM> may also include one or more processors <NUM>. The controller may be a nerve center and a command center of the electronic device <NUM>. The controller may generate an operation control signal based on an instruction operation code and a timing signal, to implement control of fetching an instruction and executing the instruction. In this embodiment of this application, both processing and calculation processes may be performed by the processor <NUM>. For example, the processor <NUM> may be configured to obtain offset information of the transmitting coil relative to the receiving coil <NUM> and/or a bottom plate rotation direction and transmit an instruction to the charging device <NUM> by using the receiving coil <NUM>, the instruction carrying the offset information and/or the bottom plate rotation direction. Therefore, the charging device <NUM> can control the transmitting coil to move according to the offset information and control the bottom plate to rotate according to the bottom plate rotation direction, to align the center point of the transmitting coil with the center point of the receiving coil <NUM>.

The memory <NUM> may be configured to store one or more computer programs, the one or more computer programs including instructions. The processor <NUM> may run the instructions stored in the memory <NUM>, to cause the electronic device <NUM> to perform various function applications, data processing, or the like. The memory <NUM> may include a high-speed random access memory, or may include a non-volatile memory such as at least one magnetic disk memory, a flash memory, or a universal flash storage (universal flash storage, UFS). A coil alignment method provided in an embodiment of this application may be one or more computer programs, and the one or more computer programs may be stored in the memory <NUM>.

The battery <NUM> is configured to supply power to various components in the electronic device <NUM>.

It may be understood that the structure shown in <FIG> does not constitute a specific limitation on the electronic device <NUM>. In some other embodiments, the electronic device <NUM> may include more or fewer components than those shown in <FIG>, or some components may be combined, or some components may be split, or components are arranged in different manners. The components shown in <FIG> may be implemented by hardware, software, or a combination of software and hardware.

It should be noted that in the accompanying drawing of the embodiments of this application, an example in which the electronic device <NUM> is a mobile phone is used for illustration. In another embodiment, the electronic device <NUM> may further be a tablet computer, a notebook computer, or a wearable device. The wearable device may be a smart watch, a smart bracelet, a headset, a virtual reality (virtual reality, VR) device, an augmented reality (augmented reality, AR) device, or the like. This is not limited in this embodiment of this application.

<FIG> are partial schematic structural diagrams of a charging device <NUM> according to an embodiment of this application. The charging device <NUM> supports coil movement. The charging device <NUM> includes: a first driving component, a bottom plate <NUM>, two transmitting coils (including an upper coil <NUM> and a lower coil <NUM>), and a processor (not shown). The first driving component includes a motor <NUM>, a gear <NUM>, and a movable component <NUM> engaged with the gear <NUM>. Referring to <FIG>, the upper coil <NUM> and the lower coil <NUM> are fixed to a front surface of the bottom plate <NUM>. Referring to <FIG>, the movable component <NUM> is fixed to a back surface of the bottom plate <NUM>. Referring to <FIG> is a top view of <FIG>. The motor <NUM> is inserted into the gear <NUM>, and the gear <NUM> may rotate under the action of the motor <NUM>.

It should be noted that to describe the principle of implementing upward and downward movement of the bottom plate by using the gear <NUM> and the movable component <NUM>, <FIG> is used for illustration in this embodiment of this application. However, it should be noted that the gear <NUM> is not fixed to the bottom plate <NUM> but is mounted on the motor <NUM> as shown in <FIG>. The gear <NUM> may rotate under the action of the motor <NUM>, and the rotation of the gear <NUM> may drive the movable component <NUM> to move upward or downward. Because the movable component <NUM> is fixed to the back surface of the bottom plate <NUM>, the movable component <NUM> may drive the bottom plate <NUM> to move upward when moving upward, and the movable component <NUM> may drive the bottom plate <NUM> to move downward when moving downward.

The upper coil <NUM> and the lower coil <NUM> are configured to transmit magnetic field energy and further configured to send an instruction to the electronic device <NUM> or receive an instruction sent by the electronic device <NUM>. The processor may control the motor <NUM> to work according to the instructions received by the upper coil <NUM> and the lower coil <NUM>, to rotate the gear <NUM>, so as to move the bottom plate <NUM> upward or downward.

<FIG> is a partial schematic diagram of another charging device <NUM> according to an embodiment of this application. The charging device <NUM> also supports the coil movement. The charging device <NUM> includes: a first driving component, a bottom plate <NUM>, two transmitting coils (including an upper coil <NUM> and a lower coil <NUM>), and a processor (not shown). The first driving component includes a motor <NUM> and a lifting apparatus <NUM>. Both the upper coil <NUM> and the lower coil <NUM> are fixed to the bottom plate <NUM>. The lifting apparatus <NUM> includes: a threaded guide rail <NUM> and at least one connector <NUM>. The threaded guide rail <NUM> is in threaded connection with the at least one connector <NUM>. The at least one connector <NUM> is fixedly connected to the bottom plate <NUM>.

When one of two components that are in threaded connection rotates but does not move in an axial direction, the other component moves in the axial direction. Therefore, by using the principle, the motor <NUM> may control the threaded guide rail <NUM> to rotate without moving upward and downward, so that the at least one connector <NUM> in threaded connection with the threaded guide rail <NUM> moves upward and downward. For example, the motor <NUM> may control the threaded guide rail <NUM> to rotate clockwise without moving upward and downward. In this case, the at least one connector <NUM> in threaded connection with the threaded guide rail <NUM> moves downward. Because the at least one connector <NUM> is fixedly connected to the bottom plate <NUM>, the at least one connector <NUM> drives the bottom plate <NUM> to move downward when moving downward. The clockwise corresponding to downward movement is merely an example. Alternatively, when the threaded guide rail <NUM> rotates counterclockwise, the bottom plate <NUM> moves downward. This is not limited in this embodiment of this application.

The upper coil <NUM> and the lower coil <NUM> are configured to transmit magnetic field energy and further configured to send an instruction to the electronic device <NUM> or receive an instruction sent by the electronic device <NUM>. The processor may control the motor <NUM> to work according to the instructions received by the upper coil <NUM> and the lower coil <NUM>, to rotate the threaded guide rail <NUM> without moving upward and downward. Under the action of the threaded guide rail <NUM>, the at least one connector <NUM> moves upward or downward, thereby driving the bottom plate <NUM> to move upward or downward.

<FIG> are partial schematic diagrams of another charging device <NUM> according to an embodiment of this application. The charging device <NUM> supports the coil movement and coil rotation. The charging device <NUM> includes: a first driving component, a second driving component, a bottom plate <NUM>, two transmitting coils (including an upper coil <NUM> and a lower coil <NUM>), and a processor (not shown). The first driving component includes a first motor <NUM> and a first gear <NUM>. The second driving component includes a second motor <NUM>, a second gear <NUM>, and a movable component <NUM> engaged with the second gear <NUM>. Referring to <FIG>, the upper coil <NUM> and the lower coil <NUM> are fixed to a front surface of the bottom plate <NUM>. Referring to <FIG>, the movable component <NUM> and the second gear <NUM> are fixed to a back surface of the bottom plate <NUM>. It should be noted that the second gear <NUM> is not fixed to the bottom plate <NUM> but is mounted on the second motor <NUM>. Referring to <FIG> is a top view of <FIG>. The first motor <NUM> is inserted into the first gear <NUM>, and the first gear <NUM> may rotate under the action of the first motor <NUM>. The second motor <NUM> is inserted into the second gear <NUM>, and the second gear <NUM> may rotate under the action of the second motor <NUM>.

It should be noted that referring to <FIG>, the rotation of the second gear <NUM> may drive the movable component <NUM> to move upward or downward. Because the movable component <NUM> is fixed to the back surface of the bottom plate <NUM>, the movable component <NUM> may drive the bottom plate <NUM> to move upward when moving upward, and the movable component <NUM> may drive the bottom plate <NUM> to move downward when moving downward. Because the first gear <NUM> is fixed to the back surface of the bottom plate <NUM>, the rotation of the first gear <NUM> may drive the bottom plate <NUM> to rotate.

It should be noted that a solution that the first gear <NUM> drives the bottom plate <NUM> to rotate is merely an example. In another embodiment, another gear may be mounted on the first motor <NUM>. The gear is engaged with the first gear <NUM>, and the gear may rotate under the action of the first motor <NUM>. Because the gear is engaged with the first gear <NUM>, the rotation of the gear may drive the first gear <NUM> to rotate, so as to drive the bottom plate <NUM> to rotate.

The upper coil <NUM> and the lower coil <NUM> are configured to transmit magnetic field energy and further configured to send an instruction to the electronic device <NUM> or receive an instruction sent by the electronic device <NUM>. The processor may control the first motor <NUM> to work according to the instructions received by the upper coil <NUM> and the lower coil <NUM>, to rotate the first gear <NUM>, so as to rotate the bottom plate <NUM>. The processor may further control the second motor <NUM> to work according to the instructions received by the upper coil <NUM> and the lower coil <NUM>, to rotate the second gear <NUM>, so as to move the bottom plate <NUM>.

It should be noted that in the structure shown in <FIG>, the structure shown in <FIG>, and the structure shown in <FIG>, the upper coil and the lower coil are fixed to the same bottom plate. In this case, when the bottom plate moves, both the upper coil and the lower coil move. In another embodiment, a plurality of transmitting coils on the charging device <NUM> may be respectively fixed to different bottom plates. After receiving an instruction sent by the electronic device <NUM>, the processor may control a plurality of bottom plates to move upward and downward independently, so that the movement of the plurality of transmitting coils does not affect each other.

The charging efficiency of the charging device <NUM> is related to a coil alignment condition. The coil alignment mentioned in this embodiment of this application refers to alignment of the transmitting coil on the charging device <NUM> with the receiving coil on the electronic device <NUM>. When the center point of the transmitting coil on the charging device <NUM> is aligned with the center point of the receiving coil on the electronic device <NUM>, the charging device <NUM> achieves the maximum charging efficiency. Generally, a size of the electronic device <NUM> is greater than that of the charging device <NUM>. When a user normally places the electronic device <NUM> on the charging device <NUM>, an offset between the center point of the transmitting coil and the center point of the receiving coil is not large in a horizontal direction. However, due to a coil design, an offset between the center point of the transmitting coil and the center point of the receiving coil is relatively large in a longitudinal direction, resulting in low charging efficiency of the charging device <NUM>. Therefore, an embodiment of this application provides an alignment method in a longitudinal direction, and alignment mentioned in this embodiment of this application refers to alignment in the longitudinal direction.

Because when the user normally places the electronic device <NUM> on the charging device <NUM>, the offset between the center point of the transmitting coil and the center point of the receiving coil is not large in the horizontal direction, in the accompanying drawings of the embodiments of this application, no offset is shown in the horizontal direction. However, it should be noted that even if there is a specific offset in the horizontal direction, alignment in the longitudinal direction may still be performed by using the method provided in this embodiment of this application.

It should be noted that in the charging system shown in <FIG>, the electronic device <NUM> includes one receiving coil and the charging device <NUM> includes two transmitting coils, which are merely an example. In another embodiment, the electronic device <NUM> may include two or more receiving coils, and the charging device <NUM> may include one transmitting coil or two or more transmitting coils. <FIG> does not constitute a limitation on this embodiment of this application. That the electronic device <NUM> includes one receiving coil may be understood as that the electronic device <NUM> is a single coil, and that the electronic device <NUM> includes two receiving coils may be understood as that the electronic device <NUM> is a dual coil. That the charging device <NUM> includes one transmitting coil may be understood as that the charging device <NUM> is a single coil, and that the charging device <NUM> includes two transmitting coils may be understood as that the charging device <NUM> is a dual coil. The meaning of center point alignment mentioned in the foregoing is described below in conjunction with the following several scenarios. In the accompanying drawings of the embodiments of this application, the receiving coil is denoted by using a solid line and the transmitting coil is denoted by using a dashed line.

In a first scenario, referring to <FIG>, the electronic device <NUM> is a single coil and the charging device <NUM> is also a single coil. The center point alignment mentioned above refers to alignment of a center point of the single coil on the charging device <NUM> with a center point of the single coil on the electronic device <NUM>.

In a second scenario, referring to <FIG>, the electronic device <NUM> is a single coil and the charging device <NUM> is a dual coil. The center point alignment mentioned above refers to alignment of a center point of an upper coil on the charging device <NUM> with the center point of the single coil on the electronic device <NUM> (referring to <FIG>) or alignment of a center point of a lower coil on the charging device <NUM> with the center point of the single coil on the electronic device <NUM>.

In a third scenario, referring to <FIG>, the electronic device <NUM> is a dual coil and the charging device <NUM> is a single coil. The center point alignment mentioned above refers to alignment of the center point of the single coil on the charging device <NUM> with a center point of an upper coil on the electronic device <NUM> (referring to <FIG>) or alignment of the center point of the single coil on the charging device <NUM> with a center point of a lower coil on the electronic device <NUM>.

In a fourth scenario, referring to <FIG>, the electronic device <NUM> is a dual coil and the charging device <NUM> is also a dual coil. The center point alignment mentioned above refers to alignment of the center point of the upper coil on the charging device <NUM> with the center point of the upper coil on the electronic device <NUM> and alignment of the center point of the lower coil on the charging device <NUM> with the center point of the lower coil on the electronic device <NUM> (referring to <FIG>). Alternatively, the center point of the upper coil on the charging device <NUM> is aligned with the center point of the lower coil on the electronic device <NUM> and the center point of the lower coil on the charging device <NUM> is aligned with the center point of the upper coil on the electronic device <NUM>.

Wireless charging performed between the charging device <NUM> and the electronic device <NUM> is applicable to a wireless charging standard QI protocol. A wireless charging process is specified in the QI protocol, including: a Ping phase, a recognition phase, a configuration phase, and a power transmission phase. In the power transmission phase, the electronic device <NUM> periodically sends a control error packet to the charging device <NUM>, the control error packet carrying a difference between a receiving power and an actually required power of the electronic device <NUM>, so that the charging device <NUM> may adjust a transmitting power according to the control error packet.

When the center point of the transmitting coil on the charging device <NUM> is aligned with the center point of the receiving coil on the electronic device <NUM>, maximum power transmission efficiency is achieved, that is, the charging device <NUM> achieves the maximum charging efficiency. Therefore, when performing the process of the QI protocol, the electronic device <NUM> may perform the coil alignment method provided in this embodiment of this application within an interval between sending two adjacent control error packets in the power transmission phase, to align the center point of the transmitting coil on the charging device <NUM> with the center point of the receiving coil on the electronic device <NUM>, thereby improving the charging efficiency of the charging device <NUM>.

A specific implementation process of coil alignment when the electronic device <NUM> is the single coil and the charging device <NUM> is the dual coil is described below by using the second scenario as an example.

<FIG> is a flowchart <NUM> according to an embodiment of this application. The specific implementation process of coil alignment in the second scenario includes the following steps.

An electronic device <NUM> establishes communication with a charging device <NUM>.

Specifically, the charging device <NUM> transmits Ping pulse energy in a polling manner by using an upper coil and a lower coil. When a user holds the electronic device <NUM> to approach the charging device <NUM>, and a distance between a single coil on the electronic device <NUM> and a transmitting coil on the charging device <NUM> is less than a preset value, the single coil on the electronic device <NUM> can receive the Ping pulse energy transmitted by the transmitting coil. In this case, the electronic device <NUM> may determine that the electronic device <NUM> can communicate with the charging device <NUM>, which may alternatively be referred to as that the electronic device <NUM> and the charging device <NUM> are Pinged.

It should be noted that it is merely an example that the charging device <NUM> transmits the Ping pulse energy in the polling manner by using the upper coil and the lower coil. In another embodiment, the charging device <NUM> may alternatively simultaneously transmit the Ping pulse energy by using the upper coil and the lower coil. This is not limited in this embodiment of this application.

The electronic device <NUM> obtains device information of the charging device <NUM>, where the device information includes a model of the charging device <NUM> and a coil identifier of a coil that establishes communication with the electronic device <NUM> on the charging device <NUM>.

For ease of description, in this embodiment of this application, the coil that establishes communication with the electronic device <NUM> on the charging device <NUM> is referred to as a first transmitting coil, and the coil that establishes communication with the first transmitting coil on the electronic device <NUM> is referred to as a first receiving coil.

In a possible implementation, the electronic device <NUM> may send a parameter report request to the charging device <NUM>. After receiving the parameter report request, the charging device <NUM> sends a model of the charging device <NUM> and an identifier of a coil that establishes communication with the electronic device <NUM> on the charging device <NUM> to the electronic device <NUM>.

The electronic device <NUM> determines, according to the model of the charging device <NUM>, whether the charging device <NUM> supports coil movement.

If it is determined that the charging device <NUM> supports the coil movement, S103 is performed. If it is determined that the charging device <NUM> does not support the coil movement, the process is ended.

It should be noted that in S101, the electronic device <NUM> obtains both the model of the charging device <NUM> and the coil identifier, which is merely an example. In another embodiment, In S101, the electronic device <NUM> may obtain only the model of the charging device <NUM>, and then obtain the coil identifier when it is determined that the charging device <NUM> supports the coil movement in S102. This is not limited in this embodiment of this application.

The electronic device <NUM> obtains a placement posture of the electronic device <NUM>.

In a possible implementation, the electronic device <NUM> may calculate a posture parameter according to measured values of a direction sensor <NUM>, a magnetometer <NUM>, an accelerometer <NUM>, and a gyroscope <NUM>, and determine a placement posture of the electronic device <NUM> according to the posture parameter. Specifically, if a value of the posture parameter is in an interval [<NUM>, <NUM>], it may be determined that the placement posture of the electronic device <NUM> is vertical placement with a side at which an earpiece hole is located facing upward. If the value of the posture parameter is in an interval [-<NUM>, <NUM>], it may be determined that the placement posture of the electronic device <NUM> is vertical placement with the side at which the earpiece hole is located facing downward. If the value of the posture parameter is in an interval [<NUM>, <NUM>], it may be determined that the placement posture of the electronic device <NUM> is horizontal placement with a side at which a Power key is located facing upward. If the value of the posture parameter is in an interval [-<NUM>, -<NUM>], it may be determined that the placement posture of the electronic device <NUM> is horizontal placement with the side at which the Power key is located facing downward. For ease of description, in this embodiment of this application, the side at which the earpiece hole is located is referred to as a first side, a side opposite to the first side is referred to as a second side, the side at which the Power key is located is referred to as a third side, and a side opposite to the third side is referred to as a fourth side.

It should be noted that division of sides of the electronic device <NUM> by using the earpiece hole and the Power key is merely an example. In another embodiment, the earpiece hole and the Power key may not be arranged on the sides. In this case, the sides of the electronic device <NUM> may be divided in another manner. This is not limited in this embodiment of this application.

The electronic device <NUM> obtains offset information of a first transmitting coil relative to a single coil on the electronic device <NUM>.

In a possible implementation, the electronic device <NUM> may determine a first transmitting coil according to the coil identifier, then obtain a distance from a center point of the first transmitting coil to a preset limiting edge and a distance from a center point of a single coil on the electronic device <NUM> to the preset limiting edge according to the model of the charging device <NUM>, and determine offset information of the first transmitting coil relative to the single coil on the electronic device <NUM> according to the distance from the center point of the first transmitting coil to the preset limiting edge and the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge. In this embodiment of this application, the distance from the center point of the first transmitting coil to the preset limiting edge is referred to as a first distance, and the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge is referred to as a second distance.

It should be noted that referring to <FIG>, in this embodiment of this application, the preset limiting edge may be a line where a side at which the electronic device <NUM> is in contact with the charging device <NUM> is located after the electronic device <NUM> is placed on the charging device <NUM>.

In a possible implementation, the electronic device <NUM> may store coil information corresponding to charging devices <NUM> of different models. The coil information includes a distance from each center point of transmitting coils on the charging devices <NUM> to the preset limiting edge. After obtaining the model of the charging device <NUM> and the coil identifier in S101, the electronic device <NUM> may query the stored coil information for the distance from the center point of the first transmitting coil to the preset limiting edge according to the model of the charging device <NUM> and the coil identifier. In addition, the electronic device <NUM> may obtain the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge according to the placement posture of the electronic device <NUM>. Specifically, when the placement posture of the electronic device <NUM> is vertical placement with the first side facing upward, a distance from the center point of the single coil on the electronic device <NUM> to the second side is the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge. When the placement posture of the electronic device <NUM> is vertical placement with the second side facing upward, a distance from the center point of the single coil on the electronic device <NUM> to the first side is the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge. When the placement posture of the electronic device <NUM> is horizontal placement with the third side facing upward, a distance from the center point of the single coil on the electronic device <NUM> to the fourth side is the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge. When the placement posture of the electronic device <NUM> is horizontal placement with the fourth side facing upward, a distance from the center point of the single coil on the electronic device <NUM> to the third side is the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge.

It should be noted that the distance from the center point of the first transmitting coil to the preset limiting edge may also be reported to the electronic device <NUM> by the charging device <NUM>. Optionally, when reporting the model of the charging device <NUM> and the coil identifier, the charging device <NUM> may report the distance from the center point of the first transmitting coil to the preset limiting edge to the electronic device <NUM> together.

In a possible implementation, after the distance from the center point of the first transmitting coil to the preset limiting edge and the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge are obtained, the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge is subtracted from the distance from the center point of the first transmitting coil to the preset limiting edge, to obtain a result of a subtraction operation. A positive or negative value of the result of the subtraction operation represents an offset direction of the first transmitting coil relative to the single coil on the electronic device <NUM>. Specifically, if the result of the subtraction operation is a positive value, it indicates that the first transmitting coil is offset upward relative to the single coil on the electronic device <NUM>. If the result of the subtraction operation is a negative value, it indicates that the first transmitting coil is offset downward relative to the single coil on the electronic device <NUM>. A value of the result of the subtraction operation indicates an offset distance of the first transmitting coil relative to the single coil on the electronic device <NUM>.

It should be noted that the manner of calculating offset information is merely an example. Alternatively, the distance from the center point of the first transmitting coil to the preset limiting edge may be subtracted from the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge. In this case, an offset direction reflected by a positive or negative value of a result of a subtraction operation is opposite to the foregoing. That is, if the result of the subtraction operation is a positive value, it indicates that the first transmitting coil is offset downward relative to the single coil on the electronic device <NUM>, and if the result of the subtraction operation is a negative value, it indicates that the first transmitting coil is offset upward relative to the single coil on the electronic device <NUM>. In this embodiment of this application, the solution of this embodiment of this application is described by using an example in which the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge is subtracted from the distance from the center point of the first transmitting coil to the preset limiting edge and the result of the subtraction operation is a positive value.

The following gives descriptions by using examples.

Example <NUM>: Referring to <FIG>, it is assumed that the model of the charging device <NUM> obtained in S101 is a model A, and the coil identifier indicates that the coil that establishes communication with the electronic device <NUM> on the charging device <NUM> is an upper coil, that is, the upper coil is the first transmitting coil. The placement posture of the electronic device <NUM> obtained in S103 is vertical placement with the first side facing upward. It is assumed that a queried distance from a center point of the upper coil on the charging device <NUM> of the model A to the preset limiting edge is A cm. Because the placement posture of the electronic device <NUM> is vertical placement with the first side facing upward, a distance from the center point of the single coil on the electronic device <NUM> to the second side is the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge. It is assumed that the distance from the center point of the single coil on the electronic device <NUM> to the second side is B cm, B cm is subtracted from A cm. Assuming that a result is a positive value, as shown in <FIG>, it may be determined that the center point of the upper coil on the charging device <NUM> is offset upward relative to the center point of the single coil on the electronic device <NUM>, and an offset distance is |A cm-B cm|.

Example <NUM>: Referring to <FIG>, it is assumed that the model of the charging device <NUM> obtained in S101 is a model A, and the coil identifier indicates that the coil that establishes communication with the electronic device <NUM> on the charging device <NUM> is a lower coil, that is, the lower coil is the first transmitting coil. The placement posture of the electronic device <NUM> obtained in S103 is vertical placement with the second side facing upward. It is assumed that a queried distance from a center point of the lower coil on the charging device <NUM> of the model A to the preset limiting edge is A cm. Because the placement posture of the electronic device <NUM> is vertical placement with the second side facing upward, a distance from the center point of the single coil on the electronic device <NUM> to the first side is the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge. It is assumed that the distance from the center point of the single coil on the electronic device <NUM> to the first side is B cm, B cm is subtracted from A cm. Assuming that a result is a positive value, as shown in <FIG>, it may be determined that the center point of the lower coil on the charging device <NUM> is offset upward relative to the center point of the single coil on the electronic device <NUM>, and an offset distance is |A cm-B cm|.

Example <NUM>: Referring to <FIG>, it is assumed that the model of the charging device <NUM> obtained in S101 is a model A, and the coil identifier indicates that the coil that establishes communication with the electronic device <NUM> on the charging device <NUM> is a lower coil, that is, the lower coil is the first transmitting coil. The placement posture of the electronic device <NUM> obtained in S103 is horizontal placement with the third side facing upward. It is assumed that a queried distance from a center point of the lower coil on the charging device <NUM> of the model A to the preset limiting edge is A cm. Because the placement posture of the electronic device <NUM> is horizontal placement with the third side facing upward, a distance from the center point of the single coil on the electronic device <NUM> to the fourth side is the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge. It is assumed that the distance from the center point of the single coil on the electronic device <NUM> to the fourth side is B cm, B cm is subtracted from A cm. Assuming that a result is a positive value, as shown in <FIG>, it may be determined that the center point of the lower coil on the charging device <NUM> is offset upward relative to the center point of the single coil on the electronic device <NUM>, and an offset distance is |A cm-B cm|.

Example <NUM>: Referring to <FIG>, it is assumed that the model of the charging device <NUM> obtained in S101 is a model A, and the coil identifier indicates that the coil that establishes communication with the electronic device <NUM> on the charging device <NUM> is a lower coil, that is, the lower coil is the first transmitting coil. The placement posture of the electronic device <NUM> obtained in S <NUM> is horizontal placement with the fourth side facing upward. It is assumed that a queried distance from a center point of the lower coil on the charging device <NUM> of the model A to the preset limiting edge is A cm. Because the placement posture of the electronic device <NUM> is horizontal placement with the fourth side facing upward, a distance from the center point of the single coil on the electronic device <NUM> to the third side is the distance from the center point of the single coil on the electronic device <NUM> to the preset limiting edge. It is assumed that the distance from the center point of the single coil on the electronic device <NUM> to the third side is B cm, B cm is subtracted from A cm. Assuming that a result is a positive value, as shown in <FIG>, it may be determined that the center point of the lower coil on the charging device <NUM> is offset upward relative to the center point of the single coil on the electronic device <NUM>, and an offset distance is |A cm-B cm|.

The electronic device <NUM> sends a control instruction to the charging device <NUM>.

The control instruction includes offset information of the first transmitting coil relative to the single coil on the electronic device <NUM>. The offset information includes an offset direction and an offset distance of the first transmitting coil relative to the single coil on the electronic device <NUM>. Therefore, the charging device <NUM> may control the bottom plate to move upward and downward according to the offset information.

Specifically, in this embodiment of this application, the charging device <NUM> adopts the structure shown in <FIG>, which corresponds to the example in <FIG>, the offset direction is upward offset, and the offset distance is |A cm-B cm|. After receiving the control instruction, the charging device <NUM> controls the bottom plate <NUM> to move downward by |A cm-B cm|, to align the center point of the upper coil on the charging device <NUM> with the center point of the single coil on the electronic device <NUM>.

Examples of <FIG> and <FIG> are similar to that of <FIG>, the offset direction is upward offset, and the offset distance is |A cm-B cm|. After receiving the control instruction, the charging device <NUM> controls the bottom plate <NUM> to move downward by |A cm-B cm|, to align the center point of the lower coil on the charging device <NUM> with the center point of the single coil on the electronic device <NUM>.

It should be noted that the upper coil and the lower coil in the structure shown in <FIG> are fixed to the same bottom plate. When the bottom plate <NUM> moves, the first transmitting coil moves, and another coil also moves. In another embodiment, the upper coil and the lower coil may be respectively fixed to different bottom plates. After receiving the control instruction, the charging device <NUM> controls only a bottom plate corresponding to the first transmitting coil to move.

In this embodiment of this application, S <NUM> may be performed in the Ping phase, and S101 to S105 may be performed within an interval between sending two adjacent control error packets in the power transmission phase.

According to the coil alignment method provided in this embodiment of this application, when an electronic device is a single coil and a charging device is a dual coil, the electronic device obtains offset information of a first transmitting coil relative to the single coil on the electronic device and sends a control instruction to the charging device, the control instruction carrying the offset information, so that after the charging device receives the control instruction, at least one coil on the charging device may be moved according to the offset information, to align a center point of the first transmitting coil with a center point of the single coil on the electronic device, thereby improving the charging efficiency of the charging device.

It should be noted that for the first scenario, because the charging device <NUM> is the single coil, the coil that establishes communication with the electronic device <NUM> on the charging device <NUM> may be only the single coil. Therefore, after the electronic device <NUM> establishes communication with the charging device <NUM>, the electronic device <NUM> may obtain only a model of the charging device <NUM>. After obtaining the model of the charging device <NUM>, the electronic device <NUM> determines whether the charging device <NUM> supports coil movement and obtains a placement posture of the electronic device <NUM> by using a positioning sensor if the charging device supports the coil movement. Subsequently, a distance from the single coil on the charging device <NUM> to the preset limiting edge is queried according to the model of the charging device <NUM>. A distance from the single coil on the electronic device <NUM> to the preset limiting edge is determined according to the placement posture of the electronic device <NUM>. Offset information of the single coil on the charging device <NUM> relative to the single coil on the electronic device <NUM> is determined based on the two distances. The electronic device <NUM> further sends a control instruction to the charging device <NUM>, the control instruction carrying the offset information, so that after the charging device <NUM> receives the control instruction, the bottom plate on the charging device <NUM> may be moved according to the offset information, to align a center point of the single coil on the charging device <NUM> with a center point of the single coil on the electronic device <NUM>. For a detailed implementation process, reference may be made to the implementation process in the second scenario. Details are not described again in this embodiment of this application.

It should be noted that for the third scenario, because the charging device <NUM> is the single coil, the coil that establishes communication with the electronic device <NUM> on the charging device <NUM> may be only the single coil. Therefore, after any coil on the electronic device <NUM> establishes communication with the single coil on the charging device <NUM>, the electronic device <NUM> obtains only a model of the charging device <NUM>, determines, according to the model of the charging device <NUM>, whether the charging device <NUM> supports coil movement, determines whether an upper coil or a lower coil on the electronic device <NUM> establishes communication with the charging device <NUM> if the charging device supports the coil movement, obtains offset information of the single coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM> according to the placement posture of the electronic device <NUM> if the upper coil on the electronic device <NUM> establishes communication with the charging device <NUM>, and sends a control instruction to the charging device <NUM>, the control instruction carrying the offset information, so that after receiving the control instruction, the charging device <NUM> controls the bottom plate to move upward and downward, to align a center point of the single coil on the charging device <NUM> with a center point of the upper coil on the electronic device <NUM>. If the lower coil on the electronic device <NUM> establishes communication with the charging device <NUM>, the electronic device obtains offset information of the single coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM> according to the placement posture of the electronic device <NUM>, and sends a control instruction to the charging device <NUM>, the control instruction carrying the offset information, so that after receiving the control instruction, the charging device <NUM> controls the bottom plate to move upward and downward, to align a center point of the single coil on the charging device <NUM> with a center point of the lower coil on the electronic device <NUM>. For a detailed implementation process, reference may be made to the implementation process in the second scenario. Details are not described again in this embodiment of this application.

The following describes a specific implementation process of coil alignment when the electronic device <NUM> is a dual coil and the charging device <NUM> is also a dual coil in the fourth scenario. In this embodiment of this application, a distance between two receiving coils on the electronic device <NUM> is the same as a distance between two transmitting coils on the charging device <NUM>. The charging device <NUM> adopts the structure shown in <FIG>.

<FIG> is a flowchart <NUM> according to an embodiment of this application. The specific implementation process of coil alignment in the fourth scenario includes the following steps.

An electronic device <NUM> establishes communication with a charging device <NUM>.

Specifically, the charging device <NUM> transmits Ping pulse energy in a polling manner by using an upper coil and a lower coil. When a user holds the electronic device <NUM> to approach the charging device <NUM>, and at least one receiving coil on the electronic device <NUM> can receive the Ping pulse energy, the electronic device <NUM> may determine that the electronic device <NUM> can communicate with the charging device <NUM>, which may alternatively be referred to as that the electronic device <NUM> and the charging device <NUM> are Pinged.

The electronic device <NUM> obtains device information of the charging device <NUM>, where the device information includes a model of the charging device <NUM> and a coil identifier of a coil that establishes communication with the electronic device <NUM> on the charging device <NUM>.

Same as the foregoing embodiments, the electronic device <NUM> may send a parameter report request to the charging device <NUM>. After receiving the parameter report request, the charging device <NUM> sends the model of the charging device <NUM> and the coil identifier of the coil that establishes communication with the electronic device <NUM> on the charging device <NUM> to the electronic device <NUM>.

The electronic device <NUM> determines, according to the model of the charging device <NUM>, whether the charging device <NUM> supports coil movement and coil rotation.

If the charging device <NUM> supports neither the coil movement nor the coil rotation, the process is ended.

If the charging device <NUM> supports the coil movement and the coil rotation, S1603 is performed.

If the charging device <NUM> supports only the coil movement, S1604 is performed.

If the charging device <NUM> supports only the coil rotation, S1605 is performed.

Obtain offset information and bottom plate rotation information.

In a possible implementation, the offset information and the bottom plate rotation information may be obtained in the following manner, referring to <FIG>, which specifically includes the following steps.

The electronic device <NUM> obtains a placement posture of the electronic device <NUM>.

For an implementation in which the electronic device <NUM> obtains the placement posture of the electronic device <NUM>, reference may be made to S103 in the foregoing embodiment. Details are not described again in this embodiment of this application.

If the coil identifier indicates that both the upper coil and the lower coil on the charging device <NUM> establish communication with the electronic device <NUM>, it indicates that the first transmitting coil includes the upper coil and the lower coil, and correspondingly, the first receiving coil includes an upper coil and a lower coil. If the placement posture of the electronic device <NUM> is vertical placement with the first side facing upward, it indicates that the electronic device <NUM> is vertically placed upright, and S1603-B is performed. If the placement posture of the electronic device <NUM> is vertical placement with the second side facing upward, it indicates that the electronic device <NUM> is vertically placed upside down, and S1603-C is performed.

If the coil identifier indicates that only the lower coil on the charging device <NUM> establishes communication with the electronic device <NUM>, it indicates that the first transmitting coil is a lower coil. If the placement posture of the electronic device <NUM> is horizontal placement, it is further determined whether an upper coil or a lower coil on the electronic device <NUM> establishes communication with the charging device <NUM>. If the upper coil on the electronic device <NUM> establishes communication with the charging device <NUM>, that is, the first receiving coil is the upper coil, S1603-D is performed. If the lower coil on the electronic device <NUM> establishes communication with the charging device <NUM>, that is, the first receiving coil is the lower coil, S1603-E is performed.

Obtain offset information of an upper coil on the charging device <NUM> relative to an upper coil on the electronic device <NUM> and offset information of a lower coil on the charging device <NUM> relative to a lower coil on the electronic device <NUM>.

Because the distance between the two receiving coils on the electronic device <NUM> is the same as the distance between the two transmitting coils on the charging device <NUM>, the offset information of the upper coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM> is the same as the offset information of the lower coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM>. Therefore, only the offset information of the upper coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM> is calculated or only the offset information of the lower coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM> is calculated.

An example in which the offset information of the upper coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM> is calculated is used.

In a possible implementation, the electronic device <NUM> may obtain the distance from the center point of the upper coil on the charging device <NUM> to the preset limiting edge and the distance from the center point of the upper coil on the electronic device <NUM> to the preset limiting edge, and determine the offset information of the upper coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM> according to the two distances.

In a possible implementation, the electronic device <NUM> may store coil information corresponding to charging devices <NUM> of different models. The coil information includes a distance from each center point of transmitting coils on the charging devices <NUM> to the preset limiting edge. After obtaining the model of the charging device <NUM> in S1601, the electronic device <NUM> may query for the distance from the center point of the upper coil on the charging device <NUM> to the preset limiting edge according to the model of the charging device <NUM>. In addition, because the placement posture of the electronic device <NUM> is vertical placement with the first side facing upward, a distance from the center point of the upper coil on the electronic device <NUM> to the second side is the distance from the center point of the upper coil on the electronic device <NUM> to the preset limiting edge.

Same as the foregoing embodiments, the manner of pre-storing the coil information is merely an example. The distance from the center point of the upper coil on the charging device <NUM> to the preset limiting edge may also be reported by the charging device <NUM> to the electronic device <NUM>.

In a possible implementation, after the distance from the center point of the upper coil on the charging device <NUM> to the preset limiting edge and the distance from the center point of the upper coil on the electronic device <NUM> to the preset limiting edge are obtained, the distance from the center point of the upper coil on the electronic device <NUM> to the preset limiting edge is subtracted from the distance from the center point of the upper coil on the charging device <NUM> to the preset limiting edge, to obtain a result of a subtraction operation. A positive or negative value of the result of the subtraction operation represents an offset direction of the upper coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM>. Specifically, if the result of the subtraction operation is a positive value, it indicates that the upper coil on the charging device <NUM> is offset upward relative to the upper coil on the electronic device <NUM>. If the result of the subtraction operation is a negative value, it indicates that the upper coil on the charging device <NUM> is offset downward relative to the upper coil on the electronic device <NUM>. A value of the result of the subtraction operation indicates an offset distance of the upper coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM>.

It should be noted that the manner of calculating offset information is merely an example. Alternatively, the distance from the center point of the upper coil on the charging device <NUM> to the preset limiting edge may be subtracted from the distance from the center point of the upper coil on the electronic device <NUM> to the preset limiting edge. In this case, an offset direction reflected by a positive or negative value of a result of a subtraction operation is opposite to the foregoing. That is, if the result of the subtraction operation is a positive value, it indicates that the upper coil on the charging device <NUM> is offset downward relative to the upper coil on the electronic device <NUM>, and if the result of the subtraction operation is a negative value, it indicates that the upper coil on the charging device <NUM> is offset upward relative to the upper coil on the electronic device <NUM>. In this embodiment of this application, the solution of this embodiment of this application is described by using an example in which the distance from the center point of the upper coil on the electronic device <NUM> to the preset limiting edge is subtracted from the distance from the center point of the upper coil on the charging device <NUM> to the preset limiting edge and the result of the subtraction operation is a positive value.

Referring to <FIG>, it is assumed that the model of the charging device <NUM> obtained in S <NUM> is a model A, the coil identifier indicates that both the upper coil and the lower coil on the charging device <NUM> establish communication with the electronic device <NUM>, and the placement posture of the electronic device <NUM> obtained in S <NUM> is vertical placement with the first side facing upward. It is queried that a distance from a center point of an upper coil on the charging device <NUM> of the model A to the preset limiting edge is A1 cm. Because the placement posture of the electronic device <NUM> is vertical placement with the first side facing upward, a distance from the center point of the upper coil on the electronic device <NUM> to the second side is the distance from the center point of the upper coil on the electronic device <NUM> to the preset limiting edge. It is assumed that the distance from the center point of the upper coil on the electronic device <NUM> to the second side is B1 cm, B1 cm is subtracted from A1 cm. Assuming that a result is a positive value, as shown in <FIG>, it may be determined that the center point of the upper coil on the charging device <NUM> is offset upward relative to the center point of the upper coil on the electronic device <NUM>, and an offset distance is |A1 cm-B1 cm|. Because the distance between the two receiving coils on the electronic device <NUM> is the same as the distance between the two transmitting coils on the charging device <NUM>, offset information of the two transmitting coils relative to the corresponding receiving coils is the same, that is, the center point of the lower coil on the charging device <NUM> is also offset upward relative to the center point of the lower coil on the electronic device <NUM>, and an offset distance is |A2 cm-B2 cm|, which is equal to |A1 cm-B <NUM>|.

Obtain offset information of the upper coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM> and offset information of the lower coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM>.

An implementation of S1603-C is similar to that of S1603-B, which may be obtained through simple inference. Details are not described again in this embodiment of this application.

Referring to <FIG>, it is assumed that the model of the charging device <NUM> obtained in S1601 is a model A, the coil identifier indicates that both the upper coil and the lower coil on the charging device <NUM> establish communication with the electronic device <NUM>, and the placement posture of the electronic device <NUM> obtained in S1603 is vertical placement with the second side facing upward. It is queried that a distance from a center point of an upper coil on the charging device <NUM> of the model A to the preset limiting edge is A1 cm. Because the placement posture of the electronic device <NUM> is vertical placement with the second side facing upward, a distance from the center point of the lower coil on the electronic device <NUM> to the first side is the distance from the center point of the lower coil on the electronic device <NUM> to the preset limiting edge. It is assumed that the distance from the center point of the lower coil on the electronic device <NUM> to the second side is B1 cm, B1 cm is subtracted from A1 cm. Assuming that a result is a positive value, as shown in <FIG>, it may be determined that the center point of the upper coil on the charging device <NUM> is offset upward relative to the center point of the lower coil on the electronic device <NUM>, and an offset distance is |A1 cm-B1 cm|. Because the distance between the two receiving coils on the electronic device <NUM> is the same as the distance between the two transmitting coils on the charging device <NUM>, offset information of the two transmitting coils relative to the corresponding receiving coils is the same, that is, the center point of the lower coil on the charging device <NUM> is also offset upward relative to the center point of the upper coil on the electronic device <NUM>, and an offset distance is |A2 cm-B2 cm|, which is equal to |A1 cm-B1 cm|.

Obtain offset information of the lower coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM> and the bottom plate rotation information.

An implementation in which the electronic device <NUM> obtains the offset information of the lower coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM> is similar to that of S1603-B, which may be obtained through simple inference. Details are not described again in this embodiment of this application.

In addition, a bottom plate rotation direction may be determined according to the placement posture of the electronic device <NUM>. Specifically, because the upper coil on the electronic device <NUM> establishes communication with the charging device <NUM>, if the placement posture of the electronic device <NUM> is horizontal placement with the third side facing upward, the lower coil on the electronic device <NUM> is on the right of the upper coil, and it may be determined that the bottom plate rotation direction is clockwise. If the placement posture of the electronic device <NUM> is horizontal placement with the fourth side facing upward, the lower coil on the electronic device <NUM> is on the left of the upper coil, and it may be determined that the bottom plate rotation direction is counterclockwise.

Example <NUM>: Referring to <FIG>, it is assumed that the model of the charging device <NUM> obtained in S1601 is a model A, the coil identifier indicates that the upper coil on the electronic device <NUM> establishes communication with the charging device <NUM>, and the placement posture of the electronic device <NUM> obtained in S1603 is horizontal placement with the third side facing upward. It is queried that a distance from a center point of a lower coil on the charging device <NUM> of the model A to the preset limiting edge is A cm. Because the placement posture of the electronic device <NUM> is horizontal placement with the third side facing upward, a distance from the center point of the upper coil on the electronic device <NUM> to the fourth side is the distance from the center point of the upper coil on the electronic device <NUM> to the preset limiting edge. It is assumed that the distance from the center point of the upper coil on the electronic device <NUM> and the fourth side is B cm, B cm is subtracted from A cm. Assuming that a result is a positive value, as shown in <FIG>, it may be determined that the center point of the lower coil on the charging device <NUM> is offset upward relative to the center point of the upper coil on the electronic device <NUM>, and an offset distance is |A1 cm-B1 cm|. Because the placement posture of the electronic device <NUM> is horizontal placement with the third side facing upward, the lower coil on the electronic device <NUM> is on the right of the upper coil, and it may be determined that the bottom plate rotation direction is clockwise.

Example <NUM>: Referring to <FIG>, it is assumed that the model of the charging device <NUM> obtained in S1601 is a model A, the coil identifier indicates that the upper coil on the electronic device <NUM> establishes communication with the charging device <NUM>, and the placement posture of the electronic device <NUM> obtained in S1603 is horizontal placement with the fourth side facing upward. It is queried that a distance from a center point of a lower coil on the charging device <NUM> of the model A to the preset limiting edge is A cm. Because the placement posture of the electronic device <NUM> is horizontal placement with the fourth side facing upward, a distance from the center point of the upper coil on the electronic device <NUM> to the third side is the distance from the center point of the upper coil on the electronic device <NUM> to the preset limiting edge. It is assumed that the distance from the center point of the upper coil on the electronic device <NUM> to the third side is B cm, B cm is subtracted from A cm. Assuming that a result is a positive value, as shown in <FIG>, it may be determined that the center point of the lower coil on the charging device <NUM> is offset upward relative to the center point of the upper coil on the electronic device <NUM>, and an offset distance is |A1 cm-B1 cm|. Because the placement posture of the electronic device <NUM> is horizontal placement with the fourth side facing upward, the lower coil on the electronic device <NUM> is on the left of the upper coil, and it may be determined that the bottom plate rotation direction is counterclockwise.

Obtain offset information of the lower coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM> and the bottom plate rotation information.

An implementation in which the electronic device <NUM> obtains the offset information of the lower coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM> is similar to that of S1603-B, which may be obtained through simple inference. Details are not described again in this embodiment of this application.

The bottom plate rotation direction may be determined according to the placement posture of the electronic device <NUM>. Specifically, because the lower coil on the electronic device <NUM> establishes communication with the charging device <NUM>, if the placement posture of the electronic device <NUM> is horizontal placement with the third side facing upward, the lower coil on the electronic device <NUM> is on the left of the upper coil, and it may be determined that the bottom plate rotation direction is counterclockwise. If the placement posture of the electronic device <NUM> is horizontal placement with the fourth side facing upward, the lower coil on the electronic device <NUM> is on the right of the upper coil, and it may be determined that the bottom plate rotation direction is clockwise.

The bottom plate rotation information includes the bottom plate rotation direction or includes the bottom plate rotation direction and a bottom plate rotation angle. The bottom plate rotation angle may be <NUM>°.

Example <NUM>: Referring to <FIG>, it is assumed that the model of the charging device <NUM> obtained in S1601 is a model A, the coil identifier indicates that the lower coil on the electronic device <NUM> establishes communication with the charging device <NUM>, and the placement posture of the electronic device <NUM> obtained in S1603 is horizontal placement with the third side facing upward. It is queried that a distance from a center point of a lower coil on the charging device <NUM> of the model A to the preset limiting edge is A cm. Because the placement posture of the electronic device <NUM> is horizontal placement with the third side facing upward, a distance from the center point of the lower coil on the electronic device <NUM> to the fourth side is the distance from the center point of the lower coil on the electronic device <NUM> to the preset limiting edge. It is assumed that the distance from the center point of the lower coil on the electronic device <NUM> to the fourth side is B cm, B cm is subtracted from A cm. Assuming that a result is a positive value, as shown in <FIG>, it may be determined that the center point of the lower coil on the charging device <NUM> is offset upward relative to the center point of the lower coil on the electronic device <NUM>, and an offset distance is |A1 cm-B1 cm|. Because the placement posture of the electronic device <NUM> is horizontal placement with the third side facing upward, the lower coil on the electronic device <NUM> is on the left of the upper coil, and it may be determined that the bottom plate rotation direction is counterclockwise.

Example <NUM>: Referring to <FIG>, it is assumed that the model of the charging device <NUM> obtained in S1601 is a model A, the coil identifier indicates that the lower coil on the electronic device <NUM> establishes communication with the charging device <NUM>, and the placement posture of the electronic device <NUM> obtained in S1603 is horizontal placement with the fourth side facing upward. It is queried that a distance from a center point of a lower coil on the charging device <NUM> of the model A to the preset limiting edge is A cm. Because the placement posture of the electronic device <NUM> is horizontal placement with the fourth side facing upward, a distance from the center point of the lower coil on the electronic device <NUM> to the third side is the distance from the center point of the lower coil on the electronic device <NUM> to the preset limiting edge. It is assumed that the distance from the center point of the lower coil on the electronic device <NUM> to the third side is B cm, B cm is subtracted from A cm. Assuming that a result is a positive value, as shown in <FIG>, it may be determined that the center point of the lower coil on the charging device <NUM> is offset upward relative to the center point of the lower coil on the electronic device <NUM>, and an offset distance is |A1 cm-B1 cm|. Because the placement posture of the electronic device <NUM> is horizontal placement with the fourth side facing upward, the lower coil on the electronic device <NUM> is on the right of the upper coil, and it may be determined that the bottom plate rotation direction is clockwise.

In a possible implementation, the offset information may be obtained in the following manner, referring to <FIG>, which specifically includes the following steps.

The electronic device <NUM> obtains a placement posture of the electronic device <NUM>.

If the coil identifier indicates that both the upper coil and the lower coil on the charging device <NUM> establish communication with the electronic device <NUM>, and the placement posture of the electronic device <NUM> is vertical placement with the first side facing upward, it indicates that the electronic device <NUM> is vertically placed upright, and S1604-B is performed.

If the coil identifier indicates that both the upper coil and the lower coil on the charging device <NUM> establish communication with the electronic device <NUM>, and the placement posture of the electronic device <NUM> is vertical placement with the second side facing upward, it indicates that the electronic device <NUM> is vertically placed upside down, and S1604-C is performed.

If the coil identifier indicates that only the lower coil on the charging device <NUM> establishes communication with the electronic device <NUM>, and the placement posture of the electronic device <NUM> is horizontal placement, it is further determined whether an upper coil or a lower coil on the electronic device <NUM> establishes communication with the charging device <NUM>. If the upper coil on the electronic device <NUM> establishes communication with the charging device <NUM>, S1604-D is performed. If the lower coil on the electronic device <NUM> establishes communication with the charging device <NUM>, S1604-E is performed.

Obtain offset information of an upper coil on the charging device <NUM> relative to an upper coil on the electronic device <NUM> and offset information of a lower coil on the charging device <NUM> relative to a lower coil on the electronic device <NUM>.

Obtain offset information of the upper coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM> and offset information of the lower coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM>.

Obtain offset information of the lower coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM>.

Obtain offset information of the lower coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM>.

Implementation processes of S1604-B, S1604-C, S1604-D, and S1604-E are similar to that of S1603-B, which may be obtained through simple inference. Details are not described again in this embodiment of this application.

Obtain the bottom plate rotation information.

In a possible implementation, the bottom plate rotation information may be obtained in the following manner, referring to <FIG>, which specifically includes the following steps.

The electronic device <NUM> obtains a placement posture of the electronic device <NUM>.

The electronic device <NUM> determines the bottom plate rotation information according to the placement posture of the electronic device <NUM>.

If the placement posture of the electronic device <NUM> is vertical placement, the charging device <NUM> does not need to rotate the bottom plate, and the process is directly ended.

If the placement posture of the electronic device <NUM> is horizontal placement, it is further determined whether the upper coil or the lower coil on the electronic device <NUM> establishes communication with the charging device <NUM>.

If the upper coil on the electronic device <NUM> establishes communication with the charging device <NUM>, and the third side of the electronic device <NUM> is facing upward, the lower coil on the electronic device <NUM> is on the right of the upper coil thereof, and it may be determined that the bottom plate rotation direction is clockwise. If the upper coil on the electronic device <NUM> establishes communication with the charging device <NUM>, and the fourth side of the electronic device <NUM> is facing upward, the lower coil on the electronic device <NUM> is on the left of the upper coil thereof, and it may be determined that the bottom plate rotation direction is counterclockwise. For a specific implementation, reference may be made to S1603-D in the foregoing embodiment. Details are not described again in this embodiment of this application.

If the lower coil on the electronic device <NUM> establishes communication with the charging device <NUM>, and the third side of the electronic device <NUM> is facing upward, the lower coil on the electronic device <NUM> is on the left of the upper coil thereof, and it may be determined that the bottom plate rotation direction is counterclockwise. If the lower coil on the electronic device <NUM> establishes communication with the charging device <NUM>, and the fourth side of the electronic device <NUM> is facing upward, the lower coil on the electronic device <NUM> is on the right of the upper coil thereof, and it may be determined that the bottom plate rotation direction is clockwise. For a specific implementation, reference may be made to S1603-E in the foregoing embodiment. Details are not described again in this embodiment of this application.

The electronic device <NUM> sends a control instruction to the charging device <NUM>.

In a case that the charging device <NUM> supports both the coil movement and the coil rotation,.

if the step performed by the electronic device <NUM> is S1603-B, the control instruction carries the offset information of the upper coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM> and the offset information of the lower coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM>.

After receiving the control instruction, the charging device <NUM> controls the bottom plate <NUM> to move according to the offset information of the upper coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM> and the offset information of the lower coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM>.

Corresponding to the example shown in <FIG>, the upper coil on the charging device <NUM> is offset upward relative to the upper coil on the electronic device <NUM>, and the offset distance is |A1 cm-B1 cm|. The lower coil on the charging device <NUM> is also offset upward relative to the lower coil on the electronic device <NUM>, and the offset distance is |A2 cm-B2 cm|. As described above, |A1 cm-B1 cm| is equal to |A2 cm-B2 cm|. After receiving the control instruction, the charging device <NUM> controls the bottom plate <NUM> to move downward by |A1 cm-B1 cm|, to align the center point of the upper coil on the charging device <NUM> with the center point of the upper coil on the electronic device <NUM>, and align the center point of the lower coil on the charging device <NUM> with the center point of the lower coil on the electronic device <NUM>.

If the step performed by the electronic device <NUM> is S1603-C, the control instruction carries the offset information of the upper coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM> and the offset information of the lower coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM>.

After receiving the control instruction, the charging device <NUM> controls the bottom plate <NUM> to move according to the offset information of the upper coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM> and the offset information of the lower coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM>.

Corresponding to the example shown in <FIG>, the upper coil on the charging device <NUM> is offset upward relative to the lower coil on the electronic device <NUM>, and the offset distance is |A1 cm-B1 cm|. The lower coil on the charging device <NUM> is also offset upward relative to the upper coil on the electronic device <NUM>, and the offset distance is |A2 cm-B2 cm|. As described above, |A1 cm-B1 cm| is equal to |A2 cm-B2 cm|. After receiving the control instruction, the charging device <NUM> controls the bottom plate <NUM> to move downward by |A1 cm-B1 cm|, to align the center point of the upper coil on the charging device <NUM> with the center point of the lower coil on the electronic device <NUM>, and align the center point of the lower coil on the charging device <NUM> with the center point of the upper coil on the electronic device <NUM>.

It should be noted that in the scenario described above, the distance between the two receiving coils on the electronic device <NUM> is the same as the distance between the two transmitting coils on the charging device <NUM>. In this case, the offset information of the two transmitting coils relative to the corresponding receiving coils is the same. Therefore, the two transmitting coils can be respectively aligned with the corresponding receiving coils by moving the bottom plate <NUM>. In another embodiment, the distance between the two receiving coils on the electronic device <NUM> is different from the distance between the two transmitting coils on the charging device <NUM>. In this case, the offset information of the two transmitting coils relative to the corresponding receiving coils is different, and the two transmitting coils cannot be respectively aligned with the corresponding receiving coils by moving the bottom plate <NUM>. In this scenario, charging devices <NUM> of different structures may be adopted, for example, the upper coil and the lower coil are respectively fixed to charging devices <NUM> on different bottom plates. Therefore, after receiving the control instruction, the charging devices <NUM> control corresponding bottom plates to move according to the offset information of the two transmitting coils.

If the step performed by the electronic device <NUM> is S <NUM>-D, the control instruction carries the offset information of the lower coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM> and the bottom plate rotation information.

After receiving the control instruction, the charging device <NUM> moves the bottom plate <NUM> according to the offset information of the lower coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM>, and rotates the bottom plate <NUM> according to the bottom plate rotation information.

Corresponding to the example shown in <FIG>, the lower coil on the charging device <NUM> is offset upward relative to the upper coil on the electronic device <NUM>, the offset distance is |A cm-B cm|, and the bottom plate rotation direction is clockwise. After receiving the control instruction, the charging device <NUM> may control the bottom plate <NUM> to move downward by |A cm-B cm|, to align the center point of the lower coil on the charging device <NUM> with the center point of the upper coil on the electronic device <NUM>. In addition, the charging device controls the bottom plate <NUM> to rotate clockwise by <NUM>°. Because the distance between the two receiving coils on the electronic device <NUM> is the same as the distance between the two transmitting coils on the charging device <NUM>, the center point of the upper coil on the charging device <NUM> can also be aligned with the center point of the lower coil on the electronic device <NUM> after rotation.

Corresponding to the example shown in <FIG>, the lower coil on the charging device <NUM> is offset upward relative to the upper coil on the electronic device <NUM>, the offset distance is |A cm-B cm|, and the bottom plate rotation direction is counterclockwise. After receiving the control instruction, the charging device <NUM> may control the bottom plate <NUM> to move downward by |A cm-B cm|, to align the center point of the lower coil on the charging device <NUM> with the center point of the upper coil on the electronic device <NUM>. In addition, the charging device controls the bottom plate <NUM> to rotate counterclockwise by <NUM>°. Because the distance between the two receiving coils on the electronic device <NUM> is the same as the distance between the two transmitting coils on the charging device <NUM>, the center point of the upper coil on the charging device <NUM> can also be aligned with the center point of the lower coil on the electronic device <NUM> after rotation.

If the step performed by the electronic device <NUM> is <NUM>-E, the control instruction carries the offset information of the lower coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM> and the bottom plate rotation information.

After receiving the control instruction, the charging device <NUM> moves the bottom plate <NUM> according to the offset information of the lower coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM>, and rotates the bottom plate <NUM> according to the bottom plate rotation information.

Corresponding to the example shown in <FIG>, the lower coil on the charging device <NUM> is offset upward relative to the lower coil on the electronic device <NUM>, the offset distance is |A cm-B cm|, and the bottom plate rotation direction is counterclockwise. After receiving the control instruction, the charging device <NUM> may control the bottom plate <NUM> to move downward by |A cm-B cm|, to align the center point of the lower coil on the charging device <NUM> with the center point of the lower coil on the electronic device <NUM>. In addition, the charging device controls the bottom plate <NUM> to rotate counterclockwise by <NUM>°. Because the distance between the two receiving coils on the electronic device <NUM> is the same as the distance between the two transmitting coils on the charging device <NUM>, the center point of the upper coil on the charging device <NUM> can also be aligned with the center point of the upper coil on the electronic device <NUM> after rotation.

Corresponding to the example shown in <FIG>, the lower coil on the charging device <NUM> is offset upward relative to the lower coil on the electronic device <NUM>, the offset distance is |A cm-B cm|, the bottom plate rotation direction is clockwise. After receiving the control instruction, the charging device <NUM> may control the bottom plate <NUM> to move downward by |A cm-B cm|, to align the center point of the lower coil on the charging device <NUM> with the center point of the lower coil on the electronic device <NUM>. In addition, the charging device controls the bottom plate <NUM> to rotate clockwise by <NUM>°. Because the distance between the two receiving coils on the electronic device <NUM> is the same as the distance between the two transmitting coils on the charging device <NUM>, the center point of the upper coil on the charging device <NUM> can also be aligned with the center point of the upper coil on the electronic device <NUM> after rotation.

It should be noted that the bottom plate rotation angle may be carried in the bottom plate rotation information or may be a default value. This is not limited in this embodiment of this application.

It should be noted that it is merely an example that the bottom plate <NUM> is first controlled to move and then the bottom plate <NUM> is controlled to rotate in the foregoing. Alternatively, the bottom plate <NUM> may be first controlled to rotate according to the bottom plate rotation direction, and then the bottom plate <NUM> is controlled to move according to the offset information. A sequence is not limited in this embodiment of this application.

In a case that the charging device <NUM> supports only the coil movement,
if the step performed by the electronic device <NUM> is S1604-B, which is the same as S <NUM>-B, the control instruction carries the offset information of the upper coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM> and the offset information of the lower coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM>.

If the step performed by the electronic device <NUM> is S <NUM>-C, which is the same as S1603-C, the control instruction carries the offset information of the upper coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM> and the offset information of the lower coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM>.

If the step performed by the electronic device <NUM> is S <NUM>-D, the control instruction carries the offset information of the lower coil on the charging device <NUM> relative to the upper coil on the electronic device <NUM>.

If the step performed by the electronic device <NUM> is S <NUM>-E, the control instruction carries the offset information of the lower coil on the charging device <NUM> relative to the lower coil on the electronic device <NUM>.

A processing process after the charging device <NUM> receives the control instruction is similar to that in the foregoing embodiments. Details are not described again in this embodiment of this application.

In a case that the charging device <NUM> supports only the coil rotation, the control instruction carries the bottom plate rotation information. A processing process after the charging device <NUM> receives the control instruction is similar to that in the foregoing embodiments. Details are not described again in this embodiment of this application.

Claim 1:
A coil alignment method, applicable to an electronic device, wherein the electronic device is configured to be capable of performing wireless charging with a charging device, the electronic device comprises at least one receiving coil, the charging device comprises at least one transmitting coil and a bottom plate, and the at least one transmitting coil is fixed to the bottom plate, wherein the method comprises:
obtaining, by the electronic device, coil adjustment information after the electronic device establishes communication with the charging device, the coil adjustment information comprising: at least one of coil offset information or bottom plate rotation information, the coil offset information being offset information of a first transmitting coil relative to a first receiving coil, the first transmitting coil being a transmitting coil that establishes communication with the electronic device on the charging device, the first receiving coil being a receiving coil that communicates with the first transmitting coil, and the bottom plate rotation information being rotation information of the bottom plate relative to the electronic device; and
sending (S1606), by the electronic device, a control instruction to the charging device, the control instruction carrying the coil adjustment information, so that the charging device adjusts the transmitting coil on the charging device according to the control instruction,
characterised in that the obtaining, by the electronic device, coil adjustment information comprises:
obtaining (S1601), by the electronic device, a model of the charging device;
determining (S1602), by the electronic device according to the model, whether the charging device supports coil movement and coil rotation;
obtaining (S1604) the coil offset information if the charging device supports only the coil movement;
obtaining (S1605) the bottom plate rotation information if the charging device supports only the coil rotation; and
obtaining (S1603) the coil offset information and the bottom plate rotation information if the charging device supports the coil movement and the coil rotation.