Patent Description:
With the development of new energy technology, the number of apparatus using batteries has increased. When electrical energy of an electrical device is exhausted, the electrical energy is often supplemented by connecting to a charging device. At the same time, there is also a way to quickly supplement electrical energy by replacing the battery. Usually, a special apparatus (referred to as a battery swap apparatus) is required to replace the battery. The existing battery swap apparatus is inconvenient to operate and has low replacement efficiency. Further background art includes:.

The present application aims to provide a battery swap system comprising a battery swap apparatus to solve the problem of low battery swap efficiency in the prior art.

Examples of the present application are implemented as follows:.

the present application provides a battery swap apparatus for replacing a battery of an electrical device, including:.

When the battery swap apparatus is moved to the electrical device, the exchange mechanism drives the two battery swap mechanisms to correspond to the battery mounting positions of the electrical device respectively, so that the two battery swap mechanisms remove and mount the batteries to the battery mounting positions of the electrical device respectively, and further, the electrical device realizes replacement of the battery; when the battery swap apparatus moves to a battery picking-and-placing apparatus, the exchange mechanism drives the two battery swap mechanisms to exchange positions, so that the two battery swap mechanisms are successively close to the battery picking-and-placing apparatus, so that a fork of the battery picking-and-placing apparatus picks up or places the battery on the two battery swap mechanisms one after the other. Through the above solution, the battery swap apparatus provided by the present application can replace two batteries at the same time by two round trips between the electrical device and the battery picking-and-placing apparatus, while the existing battery swap apparatus cannot realize the simultaneous replacement of two batteries. The existing battery swap apparatus needs at least three round trips to complete the replacement of two batteries. Since the present application meets the requirement of simultaneously replacing two batteries, the number of round trips is reduced compared with the prior art, the battery swap efficiency is improved, and the problem of low battery swap efficiency is solved.

In addition, when only one battery pack needs to be replaced, in the prior art, at least two round trips are required to complete the replacement of one battery, while the battery swap apparatus of the present application uses one battery swap mechanism to remove the battery from the battery mounting position of the electrical device, and uses another battery swap mechanism to mount the battery on the battery mounting position of the electrical device. Since the two battery swap mechanisms can exchange positions, the problem that the battery cannot be picked up and placed in cooperation with the battery picking-and-placing apparatus does not occur, therefore, the battery can be replaced with one round trip. In this way, the battery swap efficiency is improved, and the problem of low battery swap efficiency is solved.

In an embodiment of the present application, the exchange mechanism includes a driving member and a rotating base, the driving member is configured to drive the rotating base to rotate, and the two battery swap mechanisms are mounted on the rotating base and are symmetrically arranged about a rotation axis of the rotating base.

In the above solution, the positions of the two battery swap mechanisms are exchanged by rotating, and the two battery swap mechanisms are symmetrically arranged about the rotation axis of the rotating base. After the rotating base is rotated by <NUM>°, the two battery swap mechanisms are in each other's positions, and the exchange operation is simple and convenient, and it is convenient for the battery picking-and-placing apparatus to pick and place the battery. In addition, when arrangement directions of the battery mounting positions of the electrical device are different, the position of the battery swap mechanism can be changed by rotating the rotating base. This solution is suitable for a variety of electrical devices with different arrangement directions of battery mounting positions, and has wide applicability.

In an embodiment of the present application, the driving member is fixed to the movable base, the exchange mechanism further includes a first gear and a second gear that mesh with each other, the first gear is mounted on an output end of the driving member, and the second gear is fixed on the rotating base.

In the above technical solution, rotation is realized by a gear set driven on the same plane, the distance between the rotating base and the movable base is small, the overall structure of the battery swap apparatus is compact, its center of gravity is low, the movement is stable and the passability is good.

In an embodiment of the present application, the two battery swap mechanisms are arranged at intervals.

In the above technical solution, the two battery swap mechanisms are arranged at intervals so as not to interfere and affect the replacement of batteries respectively.

In an embodiment of the present application, the battery swap mechanism includes a locking and unlocking assembly and a protective enclosure, the locking and unlocking assembly comprises a base plate and a locking and unlocking unit, the locking and unlocking unit is configured for locking or unlocking the battery, the protective enclosure covers a top of the base plate, and the protective enclosure is provided with a first opening through which the locking and unlocking unit extends.

In the above technical solution, the protective enclosure shields the locking and unlocking assembly to play a protective role, and does not affect normal operation of the locking and unlocking unit.

In an embodiment of the present application, the locking and unlocking assembly further includes a positioning member for positioning the battery and a supporting member for supporting the battery, and the protective enclosure is provided with a second opening through which the positioning member extends and a third opening through which the supporting member extends.

In the above technical solution, the battery is supported by the supporting member to reduce the force of the protective enclosure, the battery is positioned on the locking and unlocking assembly by the positioning member, and the locking and unlocking assembly corresponds to the battery mounting position of the electrical device through the positioning member, thereby determining the mounting position of the battery, and ensuring that the battery corresponds to the battery mounting position of the electrical device.

In an embodiment of the present application, a side of the protective enclosure away from the locking and unlocking assembly is provided with a slot, and the slot is configured for insertion of a fork to pick and place the battery.

In the above technical solution, the fork is below a bottom surface of the battery when the fork is in the slot, and the battery can be picked up by lifting the fork upward. By setting the slot, the fork is prevented from rubbing on the bottom surface of the battery and the battery is prevented from wearing.

In an embodiment of the present application, the battery swap mechanism further includes a lift assembly, and the lift assembly is configured to lift the locking and unlocking assembly.

In the above technical solution, by the lift assembly, the height of the battery swap apparatus can be lowered when moving, so that the overall structure of the battery swap apparatus is more compact, its center of gravity is lower, and the passability of the battery swap apparatus is improved; and when the battery swap apparatus reaches the electrical device, the lift assembly lifts the battery swap mechanism, and the locking and unlocking assembly can be brought close to the electrical device to complete the unlocking and locking of the battery, thereby completing the removing and mounting of the battery.

In an embodiment of the present application, the locking and unlocking assembly is floatingly connected to the lift assembly.

In the above technical solution, since the two locking and unlocking assemblies are arranged floatingly respectively, each of the two locking and unlocking assemblies has a horizontal adjustment margin. When there is a horizontal position error of the locking and unlocking assemblies relative to the electrical device, it ensures that the two batteries correspond to the battery positions of the electrical device.

According to a second example, there is provided a battery swap system, including:.

In the battery swap system provided by the present application, its battery swap apparatus has two battery swap mechanisms that can exchange positions, so that the two battery swap mechanisms can be successively close to the battery picking-and-placing apparatus, so that the fork of the battery picking-and-placing apparatus can pick up or place the battery successively at the two battery swap mechanisms to meet the needs of replacing two batteries at the same time, and the battery swap efficiency is improved.

To more clearly describe the technical solutions in embodiments of the present application, the drawings to be used in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation of the scope. For those of ordinary skills in the art, other drawings may also be obtained based on these drawings without making creative work.

Reference numerals: <NUM>-battery swap system; <NUM>-battery; <NUM>-fastening bolt; <NUM>-first pin hole; <NUM>-chassis of vehicle; <NUM>-movable nut; <NUM>-battery swap apparatus; <NUM>-battery picking-and-placing apparatus; <NUM>-fork; <NUM>-battery swap platform; <NUM>-avoidance opening; <NUM>-rail; <NUM>-rack; <NUM>-movable base; <NUM>-base body; <NUM>-roller; <NUM>-traveling drive mechanism; <NUM>-traveling motor; <NUM> -traveling gear; <NUM>-base; <NUM>-bearing; <NUM>-battery swap mechanism; <NUM>-locking and unlocking assembly; <NUM>-base plate; <NUM>-supporting column; <NUM>-chain; <NUM>-locking and unlocking unit; <NUM>-drive motor; <NUM>-bolt sleeve; <NUM>-supporting member; <NUM>-first supporting block; <NUM>-second supporting block; <NUM>-elastic member; <NUM>-positioning member; <NUM>-protective enclosure; <NUM>-first opening; <NUM>-second opening; <NUM>-third opening; <NUM>-slot; <NUM>-lift assembly; <NUM>-scissor-type supporting arm; <NUM>-first supporting rod; <NUM>-first sliding block; <NUM>-second supporting rod; <NUM>-second sliding block; <NUM>-first bearing seat; <NUM>-second bearing seat; <NUM>-first sliding rail; <NUM>-second sliding rail; <NUM>-lift driving member; <NUM>-lift motor; <NUM>-lead screw; <NUM>-nut; <NUM>-mounting seat; <NUM>-exchange mechanism; <NUM>-rotating base; <NUM>-second gear; <NUM>-driving member; <NUM>-first gear; a-rotation axis.

Embodiments of the technical solutions of the present application will be described in detail below in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and therefore are only used as examples and cannot be used to limit the scope of protection of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art belonging to the technical field of the present application; the terms used herein are intended only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms " including" and "having" and any variations thereof in the specification and the claims of the present application and in the description of drawings above are intended to cover non-exclusive inclusion.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only to distinguish between different objects, and are not to be understood as indicating or implying a relative importance or implicitly specifying the number, particular order, or primary and secondary relation of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically defined.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only an association relationship for describing associated objects, indicating that three relationships may exist. For example, A and/or B may represent three situations: A exists alone, both A and B exist, and B exists alone. In addition, the character "/" herein generally means that the associated objects before and after it are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality of" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two) groups, and "multiple sheets" refers to two or more (including two) sheets.

In the description of the embodiments of the present application, the orientation or location relationships indicated by the technical terms "center", "longitudinal", "transverse", "length ", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", " radial", "circumferential" and the like are based on the orientation or location relationships shown in the drawings, and are only for convenience and simplification of the description of the embodiments of the present application, but do not indicate or imply that the referred apparatuses or elements must have particular orientations, be constructed and operated in particular orientations, and therefore cannot be construed as a limitation of the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise expressly specified and limited, the technical terms "mounting," "connected," "connecting," "fixing", and the like shall be understood in a broad sense, which, for example, may be a fixed connection, or a detachable connection or an integral connection, may also be a mechanical connection, or an electrical connection, may be a direct connection, or an indirect connection through an intermediate medium, and may be a communication within two elements or an interactive relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

With the development of new energy technology, the number of devices using batteries has increased. When electrical energy of the electrical device is exhausted, the electrical energy is often supplemented by connecting to a charging device. For example, electric vehicles can be connected to charging piles for charging. Compared with the method of connecting charging device such as charging piles to supplement the electrical energy, replacing the battery can realize supplement of the electrical energy faster. At present, there is also a battery swap system specially used for replacing the battery, the battery swap system is provided with a battery picking-and-placing apparatus and a movable battery swap apparatus, the battery swap apparatus is configured to replace the battery of the electrical device.

The inventor noticed that in order to improve the range ability, the number of batteries of some electrical devices is increased. For example, some electric vehicles are equipped with two batteries. However, the existing battery swap apparatus can only carry one battery at a time. For the vehicle with two batteries, the battery swap apparatus needs to travel at least three round trips between the vehicle and the battery picking-and-placing apparatus. Moreover, every time moving close to the vehicle, the battery swap apparatus needs to be repositioned before the battery is removed or mounted on the vehicle, so that the battery can be removed and mounted accurately, and the replacement efficiency is low.

In order to improve efficiency, the inventor has considered increasing the number of batteries that the battery swap apparatus carries at one time. However, if the battery swap apparatus carries two batteries, it is easy to cause one of the batteries to be outside the working range of the fork of the battery picking-and-placing apparatus, as a result, the battery picking-and-placing apparatus cannot pick up and recycle two batteries on the battery swap apparatus, nor can it place two batteries on the battery swap apparatus.

In order to alleviate the problem of low battery swap efficiency of the existing battery swap apparatus, the present application provides a solution in which the battery swap apparatus is provided with a movable base, an exchange mechanism and two battery swap mechanisms. The exchange mechanism and two battery swap mechanisms are arranged on the movable base, the two battery swap mechanisms respectively carry one battery, and when the movable base drives the battery swap apparatus to move close to the electrical device, the two battery swap mechanisms are aligned with the battery mounting positions of the electrical device respectively, so as to realize simultaneous removal or simultaneous mounting of two batteries for one positioning, the exchange mechanism is configured to drive the two battery swap mechanisms to exchange positions, so that the two battery swap mechanisms are successively within the working range of the fork of the battery picking-and-placing apparatus, so as to complete the recycle and update of the two batteries. Through the above solution, the battery swap apparatus can replace two batteries at the same time, the number of times the battery swap apparatus travels back and forth is reduced, the number of times the battery swap apparatus is positioned is reduced, and the battery swap efficiency is improved.

It should be noted that the battery mounting position refers to the space formed on the used electrical device for accommodating the battery, for example, the upwardly concave groove formed on the chassis of the vehicle, the groove allows the battery to be located in the groove, and the surface of the battery is roughly flush with the rest portions of the chassis.

The battery swap apparatus and the battery swap system disclosed in the embodiments of this present application can be used, but not limited to, to replace the battery of a vehicle, and can also be used to replace the battery of other electrical devices such as ship and aircraft, such as electric toy, power tool, battery car, electric vehicle, boat, spacecraft, etc. Wherein the electric toy may be fixed or mobile, such as game consoles, electric car toys, electric ship toys, electric airplane toys, and the like. An electric tool may be fixed or mobile, such as electric machine tools, electric sweepers, etc. The spacecraft may include airplanes, rockets, space shuttles, spaceships, and the like.

Hereinafter, the battery swap apparatus and the battery swap system will be described by taking the electrical device as a vehicle as an example.

Referring to <FIG>, a battery swap system <NUM> includes a battery swap apparatus <NUM> and a battery picking-and-placing apparatus <NUM>.

The battery swap system <NUM> further includes a battery charging apparatus (not shown in the figure), and the battery charging apparatus is configured for storing the battery <NUM> and charging the battery <NUM>. The battery picking-and-placing apparatus <NUM> can be a robot, a stacker, etc. The battery picking-and-placing apparatus <NUM> is provided with a fork <NUM> (the fork <NUM> can also be replaced with a robot arm), and the fork <NUM> picks up the battery <NUM> to be charged on the battery swap apparatus <NUM> and places it into the battery charging apparatus for recycling, and picks up the fully charged battery <NUM> from the battery charging apparatus and places it on the battery swap apparatus <NUM>.

The battery swap apparatus <NUM> moves between the vehicle and the battery picking-and-placing apparatus <NUM>. The battery swap apparatus <NUM> removes the battery <NUM> to be charged on the vehicle and transports it to the battery picking-and-placing apparatus <NUM>, and mounts the fully charged battery <NUM> updated through the battery picking-and-placing apparatus <NUM> to the vehicle.

When the electrical device is a mobile device, such as a vehicle, the battery swap system <NUM> further includes a battery swap platform <NUM> for parking the vehicle. The battery swap apparatus <NUM> moves between the battery swap platform <NUM> and the battery picking-and-placing apparatus <NUM>. The battery swap platform <NUM> is configured to lift the vehicle as a whole, and the vehicle is located above the battery swap platform <NUM>. The battery swap platform <NUM> is formed with an avoidance opening <NUM>. The battery mounting position of the vehicle (not shown in the figure) corresponds to the avoidance opening <NUM>. The battery swap apparatus <NUM> is parked under the avoidance opening <NUM> for a vehicle. A battery swap mechanism <NUM> on the battery swap apparatus <NUM> removes or mounts the battery <NUM> through the avoidance opening <NUM>.

The battery swap system <NUM> further includes a rail <NUM>, one end of the rail <NUM> extends to the working range of the fork <NUM> of the battery picking-and-placing apparatus <NUM>, and the other end of the rail <NUM> extends to the battery swap platform <NUM>. The battery swap apparatus <NUM> is provided with a roller <NUM> and a traveling drive mechanism <NUM>, the roller <NUM> cooperates with the rail <NUM>, and the traveling drive mechanism <NUM> drives the roller <NUM> to roll on the rail <NUM>.

The traveling drive mechanism <NUM> may be a drive motor, a hydraulic drive rod, etc. As shown in <FIG>, in this embodiment, the traveling drive mechanism <NUM> includes a traveling motor <NUM> and a traveling gear <NUM>. The traveling motor <NUM> is mounted on the battery swap apparatus <NUM>, and the traveling gear <NUM> is arranged at an output end of the traveling motor <NUM>. As shown in <FIG> and <FIG>, the battery swap system <NUM> further includes a rack <NUM>, the rack <NUM> is fixed on the ground and extends along the rail <NUM>, the rack <NUM> meshes with the traveling gear <NUM>, and when the traveling motor <NUM> works, the traveling gear <NUM> is driven to rotate on the rack <NUM>, thereby driving the battery swap apparatus <NUM> to move.

Referring to <FIG>, <FIG> and <FIG>, the battery swap apparatus <NUM> includes a movable base <NUM>, an exchange mechanism <NUM> and two battery swap mechanisms <NUM>. The movable base <NUM> is configured to drive the battery swap apparatus <NUM> to move, that is, to mount the aforementioned roller <NUM> and the traveling drive mechanism <NUM>. The exchange mechanism <NUM> and the two battery swap mechanisms <NUM> are arranged on the movable base <NUM>. The two battery swap mechanisms <NUM> are each configured to carry one battery <NUM>, so that the battery swap apparatus <NUM> can simultaneously replace the two batteries <NUM>. The exchange mechanism <NUM> is configured to drive the two battery swap mechanisms <NUM> to exchange positions.

Replacing two batteries <NUM> by the battery swap apparatus <NUM> only requires two round trips between the battery picking-and-placing apparatus <NUM> and the vehicle. The first round trip: the battery swap apparatus <NUM> is moved to the bottom of the vehicle without load, the two battery swap mechanisms <NUM> are positioned at the same time, and remove the two batteries <NUM> to be charged on the vehicle. Then, the battery swap apparatus <NUM> carries two batteries <NUM> to be charged and moves to be close to the battery picking-and-placing apparatus <NUM>, so that one battery swap mechanism <NUM> is first within the working range of the fork <NUM> of the battery picking-and-placing apparatus <NUM>, and the battery picking-and-placing apparatus <NUM> picks up the battery <NUM> to be charged at the battery swap mechanism <NUM> and places the fully charged battery <NUM>, and then the exchange mechanism <NUM> drives the two battery swap mechanisms <NUM> to exchange positions, so that the other battery swap mechanism <NUM> is within the working range of the fork <NUM> of the battery picking-and-placing apparatus <NUM>, the battery picking-and-placing apparatus <NUM> repeats the action to pick up the battery <NUM> to be charged on another battery swap mechanism <NUM> and places the fully charged battery <NUM>. The second round trip: the battery swap apparatus <NUM> carries two fully charged batteries <NUM> and moves to the bottom of the vehicle, the two battery swap mechanisms <NUM> are positioned at the same time, and mount the two fully charged batteries <NUM> in the battery mounting positions of the vehicle, and then the battery swap apparatus returns to the original position without load and wait for the next work.

Replacing two batteries with the existing battery swap apparatus requires at least three round trips. The existing battery swap apparatus needs to be positioned at the bottom of the vehicle before removing and mounting the battery. During the entire battery swap process, the existing battery swap apparatus needs to be positioned at the bottom of the vehicle four times, only one battery can be replaced at a time. Compared with the existing battery swap apparatus, the battery swap apparatus <NUM> provided in this embodiment can replace two batteries <NUM> at the same time, which reduces the number of round trips, and reduces the number of times that the battery swap apparatus <NUM> is positioned at the bottom of the vehicle, and removing work of the two batteries <NUM> is carried out synchronously, and the mounting work of the two batteries <NUM> is carried out synchronously, which effectively improves the battery swap efficiency and solves the problem of low battery swap efficiency.

The battery swap apparatus <NUM> provided in this embodiment can not only be configured to replace two batteries <NUM> at the same time, but also can improve the battery swap efficiency when replacing the battery for a vehicle carrying one battery <NUM>. One battery swap mechanism <NUM> of the battery swap apparatus <NUM> is unloaded, and the other battery swap mechanism <NUM> carries a fully charged battery <NUM> and moves to the bottom of the vehicle. The unloaded battery swap mechanism <NUM> first locates and removes the battery <NUM> to be charged, and then the exchange mechanism <NUM> drives the two battery swap mechanisms <NUM> to exchange positions, so that the other battery swap mechanism <NUM> carrying the fully charged battery <NUM> is positioned, and the fully charged battery <NUM> is mounted in the vehicle, and then the battery swap apparatus <NUM> carries the battery <NUM> to be charged to move to the battery picking-and-placing apparatus <NUM>. The existing battery swap apparatus requires at least two round trips, but this embodiment only requires one round trip, which effectively improves the battery swap efficiency and solves the problem of low battery swap efficiency. In addition, since the two battery swap mechanisms <NUM> can be exchanged in positions, as long as the unloaded battery swap mechanism <NUM> is positioned accurately, the battery swap mechanism <NUM> carrying the fully charged battery <NUM> can be positioned accurately by directly exchanging positions via the battery swap mechanism <NUM>, so the difficulty of positioning is reduced, the positioning speed is accelerated, and the battery swap efficiency is improved.

As shown in <FIG>, the exchange mechanism <NUM> includes a driving member <NUM> and a rotating base <NUM>. The driving member <NUM> is configured to drive the rotating base <NUM> to rotate on the movable base <NUM>, and the two battery swap mechanisms <NUM> are mounted on the rotating base <NUM>. When the rotating base <NUM> rotates, the two battery swap mechanisms <NUM> realize position exchange. <FIG> shows a rotation axis a of the rotating base <NUM>, and the two battery swap mechanisms <NUM> are symmetrically arranged about the rotation axis a of the rotating base <NUM>.

As shown in <FIG> and <FIG>, one side of the rotating base <NUM> is connected to the movable base <NUM>, the other side of the rotating base <NUM> is configured to mount two battery swap mechanisms <NUM>, the rotation axis a of the rotating base <NUM> is perpendicular to the horizontal plane, and when the rotating base <NUM> rotates, the positions of the two battery swap mechanisms <NUM> are changed.

Due to the symmetry of the two battery swap mechanisms <NUM> about the rotating base <NUM>, the rotating base <NUM> is rotated horizontally by <NUM>°, and the two battery swap mechanisms <NUM> exchange positions, that is, the two battery swap mechanisms <NUM> are at each other's positions, thus, the exchange method is simple and convenient.

In existing vehicles, a length direction of the battery mounting positions of some vehicles is perpendicular to a length direction of the vehicle body (that is, arranged transversely), and the length direction of the battery mounting positions of some vehicles is along the length direction of the vehicle body (that is, arranged longitudinally). In the battery swap apparatus <NUM> provided by the embodiment, when its rotating base <NUM> is rotated by <NUM>°, the batteries <NUM> carried by the two battery swap mechanisms <NUM> can be switched to the corresponding transverse or longitudinal directions. If the battery mounting positions of the vehicle are arranged in other directions relative to the vehicle body, the rotation angle of the rotating base <NUM> can be adjusted to other angles. Therefore, no matter how the battery mounting positions of the vehicle are arranged, the two battery swap mechanisms <NUM> and the batteries <NUM> they carry can be driven to correspond to the arrangement directions of the battery mounting positions of the vehicle body by driving the rotating base <NUM> to rotate at an appropriate angle by the driving member <NUM>, the battery swap apparatus <NUM> provided in this embodiment can not only improve the battery swap efficiency, but also has wider applicability.

In other embodiments of the present application, other ways can also be used to exchange the positions of the two battery swap mechanisms <NUM>. For example, the exchange mechanism <NUM> includes a conveyor belt and a rocker, the conveyor belt is mounted on the movable base <NUM>, and the two battery swap mechanisms <NUM> are located on the conveyor belt and arranged along the moving direction of the conveyor belt. For the convenience of description, the two battery swap mechanisms <NUM> are called the first battery swap mechanism <NUM> and the second battery swap mechanism <NUM> respectively. One end of the rocker is connected to the movable base <NUM>, and the other end thereof is connected to the first battery swap mechanism <NUM>, when the rocker swings, the first battery swap mechanism <NUM> is lifted and disengaged from the conveyor belt to make room, so that the conveyor belt drives the second battery swap mechanism <NUM> to move to the position of the first battery swap mechanism <NUM>, and then the rocker continues to swing to place the first battery swap mechanism <NUM> at the position of the second battery swap mechanism <NUM>.

As shown in <FIG>, the driving member <NUM> is fixed to the movable base <NUM>, the exchange mechanism <NUM> further includes a first gear <NUM> and a second gear <NUM> that mesh with each other, the first gear <NUM> is mounted on an output end of the driving member <NUM>, and the second gear <NUM> is fixed on the rotating base <NUM>.

As shown in <FIG>, the movable base <NUM> includes a base body <NUM> and a base <NUM>, the base <NUM> is arranged on the base body <NUM>, and the base <NUM> is provided with a bearing <NUM>. The aforementioned roller <NUM> and the traveling drive mechanism <NUM> are all mounted on the base body <NUM>, the driving member <NUM> is a servo motor mounted on the base body <NUM>, and an output end of the servo motor is connected to a rotating shaft of the first gear <NUM> to drive the first gear <NUM> to rotate. The second gear <NUM> is fixed on the side of the rotating base <NUM> close to the movable base <NUM>, the second gear <NUM> is connected to the bearing <NUM>, and the second gear <NUM> meshes with the first gear <NUM>. In this way, if the driving member <NUM> drives the first gear <NUM> to rotate, the second gear <NUM> will rotate therewith and drive the rotating base <NUM>.

Since the first gear <NUM> and the second gear <NUM> are arranged on the same plane, a distance between the rotating base <NUM> and the movable base <NUM> is small, the overall structure of the battery swap apparatus <NUM> is compact, its center of gravity is low, the movement thereof is stable, and the passability is good, so that the battery swap apparatus is easy to move to the bottom of the vehicle.

Optionally, an output shaft of the servo motor extends in a horizontal direction, the rotating shaft of the first gear <NUM> extends in a vertical direction, and the output shaft of the servo motor and the rotating shaft of the first gear <NUM> are driven by a bevel gear set to further reduce the vertical space occupied.

In some embodiments, the driving member <NUM> may also be other driving assemblies. For example, the driving member <NUM> includes a cylinder and a rack <NUM>, the rack <NUM> meshes with the first gear <NUM>, and the rack <NUM> is connected to an output end of the cylinder. The output end of the cylinder drives the rack <NUM> to move to drive the first gear <NUM> to rotate.

In some embodiments, as shown in <FIG>, the two battery swap mechanisms <NUM> are arranged at intervals, that is, there is a certain spacing distance between the two battery swap mechanisms <NUM>. The spacing distance can prevent the two battery swap mechanisms <NUM> from interfering with each other, and prevent the two batteries <NUM> carried by the two battery swap mechanisms <NUM> from interfering, ensuring that the two battery swap mechanisms <NUM> can replace the batteries <NUM> independently.

Referring to <FIG>, <FIG>, <FIG> and <FIG>, the battery swap mechanism <NUM> includes a locking and unlocking assembly <NUM>. The locking and unlocking assembly <NUM> includes a base plate <NUM> and a locking and unlocking unit <NUM>. The locking and unlocking unit <NUM> is mounted on the base plate <NUM>. The battery swap mechanism <NUM> further includes a protective enclosure <NUM>, the protective enclosure <NUM> covers a top of the base plate <NUM>, the protective enclosure <NUM> is provided with a first opening <NUM>, and the first opening <NUM> is configured for the locking and unlocking unit <NUM> to extend out, so that the locking and unlocking unit <NUM> can lock or unlock the battery <NUM>, thereby fixing the battery <NUM> to the battery mounting position of the vehicle, or removing the battery <NUM> from the battery mounting position of the vehicle.

As shown in <FIG>, the battery <NUM> is generally provided with a fastening bolt <NUM>, and the vehicle chassis is provided with a movable nut <NUM>. The fastening bolt <NUM> is in screw-thread fit with the movable nut <NUM>, and the locking and unlocking unit <NUM> is configured to screw the fastening bolt <NUM> into the movable nut <NUM> to fix and mount the battery <NUM> at the battery mounting position, and to screw the fastening bolt <NUM> out of the movable nut <NUM> to remove the battery <NUM>. For example, the locking and unlocking unit <NUM> includes a locking and unlocking drive motor <NUM> and a bolt sleeve <NUM>. One end of the bolt sleeve <NUM> is connected to an output end of the locking and unlocking drive motor <NUM>, and the other end of the bolt sleeve <NUM> is matched with the fastening bolt <NUM>. The locking and unlocking drive motor <NUM> drives the bolt sleeve <NUM> to rotate forward or reverse, so as to drive the fastening bolt <NUM> to be screwed into or out of the movable nut <NUM>. In other embodiments, the locking and unlocking unit <NUM> may also adopt other ways of locking and unlocking the battery <NUM>.

The protective enclosure <NUM> covers an outside of the locking and unlocking assembly <NUM> to protect the locking and unlocking assembly <NUM>. For example, when the fork <NUM> of the stacker picks up and places the battery <NUM> on the battery swap mechanism <NUM>, the protective enclosure <NUM> prevents the fork <NUM> from directly colliding with the locking and unlocking assembly <NUM> to avoid damage to the locking and unlocking assembly <NUM>, and the protective enclosure <NUM> does not affect the locking and unlocking unit <NUM> to lock or unlock the battery <NUM>.

As shown in <FIG>, <FIG> and <FIG>, the locking and unlocking assembly <NUM> further includes a positioning member <NUM> and a supporting member <NUM>. The positioning member <NUM> and the supporting member <NUM> are both mounted on the base plate <NUM>, and the protective enclosure <NUM> is provided with a second opening <NUM> and a three opening <NUM>, the positioning member <NUM> extends from the second opening <NUM>, and the supporting member <NUM> extends from the third opening <NUM>. The positioning member <NUM> is configured for positioning the battery <NUM>, and the supporting member <NUM> is configured for supporting the battery <NUM>.

As shown in <FIG>, each battery swap mechanism <NUM> has a plurality of supporting members <NUM>, and the plurality of supporting members <NUM> jointly support one battery <NUM>. Each battery <NUM> is placed on the battery swap mechanism <NUM> by means of multi-point support to ensure that the battery <NUM> is placed stably. Under the action of the supporting member <NUM>, the force of the protective enclosure <NUM> is reduced and is not easily damaged.

As shown in <FIG>, an outer periphery of the battery <NUM> is provided with a first pin hole <NUM>, and the positioning member <NUM> is inserted through the first pin hole <NUM> to position the battery <NUM> relative to the locking and unlocking assembly <NUM>. Optionally, a chassis <NUM> of the vehicle is provided with a second pin hole (not shown in the figure), and the positioning member <NUM> passes through the first pin hole <NUM> and enters the second pin hole to position the battery <NUM> on the chassis <NUM> of the vehicle. The positioning member <NUM> is configured as a pin, an end of the pin is formed as a cone, and an outer periphery of the cone forms a slope to facilitate guiding the pin into the first pin hole <NUM> and the second pin hole, thereby reducing the difficulty of positioning.

Under cooperation of the positioning member <NUM> and the supporting member <NUM>, the locking and unlocking assembly <NUM>, the battery <NUM> and the chassis <NUM> of the vehicle are positioned to ensure that the battery <NUM> corresponds to the battery mounting position on the chassis <NUM> of the vehicle.

Optionally, the supporting member <NUM> includes a first supporting block <NUM>, a second supporting block <NUM> and an elastic member <NUM>, and the elastic member <NUM> is connected between the first supporting block <NUM> and the second supporting block <NUM>. The first supporting block <NUM> is fixedly connected to the base plate <NUM>, the elastic member <NUM> supports the second supporting block <NUM> to elastically extend from the third opening <NUM> of the protective enclosure <NUM>, and the second supporting block <NUM> contacts a bottom surface of the battery <NUM>.

The supporting member <NUM> enables the battery <NUM> and the locking and unlocking unit <NUM> to have a vertical movement margin. When subject to an external force, the supporting member <NUM> is compressed, the battery <NUM> is close to the locking and unlocking unit <NUM>, and the locking and unlocking unit <NUM> cooperates with the fastening bolt <NUM> of the battery <NUM>; and when the external force disappears, the supporting member <NUM> recovers from the deform, the battery <NUM> is relatively away from the locking and unlocking unit <NUM>, and the locking and unlocking unit <NUM> is disengaged from the fastening bolt <NUM>. Under the action of the supporting member <NUM>, it is convenient to control locking and unlocking of the battery <NUM>, and also avoid the interference between the locking and unlocking unit <NUM> and the battery <NUM>, so that the battery <NUM> can be easily removed from or placed into the battery swap mechanism <NUM>.

In order to further protect the locking and unlocking assembly <NUM> and the battery <NUM>, as shown in <FIG>, the protective enclosure <NUM> is further provided with a slot <NUM>. The slot <NUM> is located on a side of the protective enclosure <NUM> away from the locking and unlocking assembly <NUM>. The slot <NUM> is configured for insertion of the fork <NUM> to pick and place the battery <NUM>.

The fork <NUM> of the stacker has two arms (referring to <FIG>). As shown in <FIG>, two parallel and spaced slots <NUM> are formed on each protective enclosure <NUM>. When the battery swap mechanism <NUM> carries the battery <NUM>, the slots <NUM> are located below the battery <NUM> (referring to <FIG>), and both ends of each slot <NUM> are open to allow the two arms of the fork <NUM> to enter horizontally from the ends of the two slots <NUM> respectively, so that the two arms are located at the bottom of the battery <NUM>, and the two arms are raised to lift the battery <NUM> from the battery swap mechanism <NUM>, so as to pick up the battery <NUM>. When the battery <NUM> needs to be placed on the battery swap mechanism <NUM>, the two arms are lowered first so that the battery <NUM> contacts the supporting member <NUM>. At this time, the two arms fall into the two slots <NUM> respectively, then the two arms move horizontally out of the two slots <NUM>, and the battery picking-and-placing apparatus <NUM> completes the action of placing the fully charged battery <NUM> in the battery swap mechanism <NUM>.

By arranging the slot <NUM>, it is convenient for the fork <NUM> to pick and place the battery <NUM>. Further, the fork <NUM> is lowered to be lower than the bottom surface of the battery <NUM> first, and then moves horizontally to enter or exit the slot <NUM>. The fork <NUM> does not contact the bottom surface of the battery <NUM> during the horizontal movement, and will not wear the battery <NUM>.

The battery swap mechanism <NUM> further includes a lift assembly <NUM>, and the lift assembly <NUM> is configured to lift the locking and unlocking assembly <NUM>.

As shown in <FIG> and <FIG>, the lift assembly <NUM> includes a scissor-type supporting arm <NUM>, a lift driving member <NUM> and a mounting seat <NUM>. The locking and unlocking assembly <NUM> is mounted on the mounting seat <NUM>, an upper end of the scissor-type supporting arm <NUM> is connected to the mounting seat <NUM>, a lower end of the scissor-type supporting arm <NUM> is connected to the rotating base <NUM>, and the lift driving member <NUM> is configured to drive the scissor-type supporting arm <NUM> to lift and lower, so as to drive the locking and unlocking assembly <NUM> on the mounting seat <NUM> to rise and fall.

The scissor-type supporting arm <NUM> includes a first supporting rod <NUM>, a second supporting rod <NUM>, a first bearing seat <NUM>, a second bearing seat <NUM>, a first sliding rail <NUM> and a second sliding rail <NUM>. The middle portions of the first supporting rod <NUM> and the second supporting rod <NUM> are connected by a rotating shaft; one end of the first supporting rod <NUM> is connected to the first bearing seat <NUM>, and the other end of the first supporting rod <NUM> is provided with a first sliding block <NUM>. The first sliding block <NUM> is slidably connected to the first sliding rail <NUM>; one end of the second supporting rod <NUM> is connected to the second bearing seat <NUM>, the other end of the second supporting rod <NUM> is provided with a second sliding block <NUM>, and the second sliding block <NUM> is slidably connected to the second sliding rail <NUM>. The first bearing seat <NUM> and the second sliding rail <NUM> are fixed to the rotating base <NUM>, and the second bearing seat <NUM> and the first sliding rail <NUM> are fixed to the mounting seat <NUM>.

The lift driving member <NUM> includes a lift motor <NUM>, a lead screw <NUM> and a nut <NUM>. The lift motor <NUM> and the lead screw <NUM> are mounted on the rotating base <NUM>, and the lead screw <NUM> is parallel to the first sliding rail <NUM> and the second sliding rail <NUM>. An output end of the lift motor <NUM> is connected to the lead screw <NUM> to drive the lead screw <NUM> to rotate, the nut <NUM> is in screw-thread fit with the lead screw <NUM>, and the nut <NUM> is fixedly connected to the second sliding block <NUM>.

When the lift motor <NUM> works, the lead screw <NUM> rotates, the nut <NUM> moves along the lead screw <NUM>, and drives the second sliding block <NUM> to move along the second sliding rail <NUM>, thereby driving the first supporting rod <NUM> and the second supporting rod <NUM>, so that the locking and unlocking assembly <NUM> on the mounting seat <NUM> lifts and lowers.

The lift assembly can also use apparatus for driving the lift, such as a hydraulic cylinder, an air cylinder, an electric cylinder, a lead screw <NUM> and nut <NUM> assembly, that is, the scissor-type supporting arm <NUM> is driven through the hydraulic cylinder, the air cylinder, the electric cylinder, the lead screw <NUM> and nut <NUM> assembly, etc., or the locking and unlocking assembly <NUM> is directly mounted on an output end of the hydraulic cylinder, air cylinder, electric cylinder, lead screw <NUM> and nut <NUM> assembly, etc..

By arranging the lift assembly <NUM>, a height of the battery swap apparatus <NUM> is lowered during the moving process, so that the overall structure of the battery swap apparatus <NUM> is more compact, its center of gravity is lower, and the passability of the battery swap apparatus <NUM> is improved; when the battery swap apparatus <NUM> reaches the electrical device, the lift assembly <NUM> lifts the battery swap mechanism <NUM>, that is, the locking and unlocking assembly <NUM> can be brought close to the chassis <NUM> of the vehicle to perform a positioning action, a unlocking and locking action of the battery <NUM>, thereby completing removing and mounting of the battery <NUM>.

In some embodiments, the locking and unlocking assembly is floatingly connected to the lift assembly <NUM>.

As shown in <FIG>, the base plate <NUM> of the locking and unlocking assembly <NUM> is located above the mounting seat <NUM>, and the base plate <NUM> is spaced from the mounting seat <NUM>. The base plate <NUM> is provided with a plurality of supporting columns <NUM>. The supporting columns <NUM> are bent and extend below the mounting seat <NUM>. The supporting columns <NUM> and the mounting seat <NUM> are connected by chains <NUM>. The length of the chain <NUM> is smaller than the length of the supporting column <NUM>, so as to keep the base plate <NUM> spaced from the mounting seat <NUM>, so that the base plate <NUM> is suspended above the mounting seat <NUM>.

In this embodiment, the base plate <NUM> is rectangular in shape, an area of the mounting seat <NUM> is smaller than that of the base plate <NUM>, a horizontal projection of the base plate <NUM> covers the mounting seat <NUM>, the base plate <NUM> is provided with four supporting columns <NUM>, and the four supporting columns <NUM> are respectively located at four corners of the rectangle. The mounting seat <NUM> is provided with four chains <NUM> correspondingly, each supporting column <NUM> is L-shaped, one end of the L-shape is connected to the base plate <NUM>, and the other end of the L-shape is connected to the chain <NUM>. The four supporting columns <NUM> and the four chains <NUM> work together, so that none of the base plate <NUM> and the four supporting columns <NUM> contacts the mounting seat <NUM>, in order to avoid the floating of the locking and unlocking assembly <NUM> being hindered.

Since the two locking and unlocking assemblies <NUM> are respectively floatingly arranged on the lift assembly <NUM>, the two locking and unlocking assemblies <NUM> each have a horizontal adjustment margin during the positioning process. When there is a position error of the locking and unlocking assembly <NUM> relative to the battery mounting position of the vehicle, the locking and unlocking assembly <NUM> can move horizontally to adjust the position, so as to ensure that the two batteries <NUM> correspond to the battery mounting positions of the vehicle respectively.

According to some embodiments of the present application, the present application provides a battery swap system <NUM>, as shown in <FIG>, including a rail <NUM>, the aforementioned battery swap apparatus <NUM>, a battery swap platform <NUM>, and a battery picking-and-placing apparatus <NUM>. The battery swap platform <NUM> is located at one end of the rail <NUM>, the battery picking-and-placing apparatus <NUM> is located at the other end of the rail <NUM>, and the battery swap apparatus <NUM> is movably disposed on the rail <NUM>.

Because the battery swap apparatus <NUM> can replace two batteries <NUM> at the same time, the battery swap efficiency is high; the battery swap apparatus <NUM> also has high battery swap efficiency when only one battery <NUM> is replaced; the exchange mechanism <NUM> of the battery swap apparatus <NUM> can also adjust the position of the battery swap mechanism <NUM> and the battery <NUM> it carries to adapt to the battery mounting positions of vehicles in different directions. Therefore, the battery swap system <NUM> provided in this embodiment of the present application has a wide range of applications and meets the battery swap needs of various types of vehicles (or other electrical devices), and the battery swap efficiency is high.

According to some embodiments of the present application, with reference to <FIG>, the present application provides a battery swap apparatus <NUM>. The battery swap apparatus <NUM> includes a movable base <NUM>, an exchange mechanism <NUM> and two battery swap mechanisms <NUM>. The exchange mechanism <NUM> and the two battery swap mechanisms <NUM> are arranged on the movable base <NUM>, the two battery swap mechanisms <NUM> are configured to carry two batteries <NUM>, so that the battery swap apparatus <NUM> can replace the two batteries <NUM> at the same time, and the exchange mechanism <NUM> is configured to drive the two battery swap mechanisms <NUM> to exchange positions. Wherein the exchange mechanism <NUM> includes a driving member <NUM> and a rotating base <NUM>. The driving member <NUM> and the rotating base <NUM> are mounted on the movable base <NUM>, and the driving member <NUM> is configured to drive the rotating base <NUM> to rotate on the movable base <NUM> around a vertical rotation axis a. The driving member <NUM> is a servo motor. Referring to <FIG>, the output end of the servo motor is provided with a first gear <NUM>, and the rotating base <NUM> is provided with a second gear <NUM>. The first gear <NUM> meshes with the second gear <NUM>, and the servo motor drives the rotating base <NUM> to rotate via the first gear <NUM> and the second gear <NUM>. Referring to <FIG>, the two battery swap mechanisms <NUM> are arranged on the rotating base <NUM> at intervals, and the two battery swap mechanisms <NUM> are symmetrical about the rotation axis a of the rotating base <NUM>.

Each battery swap mechanism <NUM> includes a lift assembly <NUM>, a locking and unlocking assembly <NUM> and a protective enclosure <NUM>. The lift assembly <NUM> is connected to the rotating base <NUM>, the locking and unlocking assembly <NUM> is connected to the lift assembly <NUM>, and the protective enclosure <NUM> is located on the locking and unlocking assembly <NUM>. The lift assembly <NUM> includes a scissor-type supporting arm <NUM>, a lift driving member <NUM> and a mounting seat <NUM>. The scissor-type supporting arm <NUM> is connected to the rotating base <NUM> and the mounting seat <NUM>, and the lift driving member <NUM> drives the scissor-type supporting arm <NUM> to function, such that the mounting seat <NUM> is raised or lowered relative to the rotating base <NUM>. The locking and unlocking assembly <NUM> includes a base plate <NUM>, four locking and unlocking units <NUM>, four positioning members <NUM> and six supporting members <NUM>, and the four locking and unlocking units <NUM>, four positioning members <NUM> and six supporting members <NUM> are all mounted on the base plate <NUM>. The base plate <NUM> is floatingly connected to the mounting seat <NUM> through the chains <NUM> and the supporting columns <NUM>, so that the entire locking and unlocking assembly <NUM> has a horizontal movement margin relative to the mounting seat <NUM>. The protective enclosure <NUM> is connected to the base plate <NUM>. The protective enclosure <NUM> is provided with four first openings <NUM>, four second openings <NUM> and six third openings <NUM>, wherein the four first openings <NUM> correspond to the positions of the four locking and unlocking units <NUM>, the four second openings <NUM> correspond to the positions of the four positioning members <NUM>, and the six third openings <NUM> correspond to the positions of the six supporting members <NUM>. The six supporting members <NUM> extend from the six third openings <NUM> to support the battery <NUM>, the four positioning members <NUM> extend from the four second openings <NUM> and cooperate with the positioning structures on the vehicle to position the battery <NUM>, the four locking and unlocking units <NUM> extend from the four first openings <NUM> to drive the fastening bolt <NUM> provided outside the battery <NUM> to rotate.

In this embodiment, the six supporting members <NUM> are evenly arranged in a middle of the base plate <NUM> to provide uniform supporting force to the battery <NUM>. Referring to <FIG>, the four supporting members <NUM> are configured to support four corners of the battery <NUM>, the two supporting members <NUM> are configured to support a middle position of the battery <NUM>. The four positioning members <NUM> are distributed on edges of the base plate <NUM> to allow space for placing the battery <NUM>. The four locking and unlocking assemblies <NUM> are disposed near the four supporting members <NUM> so as to be close to the outer periphery of the battery <NUM> to drive the fastening bolt <NUM> disposed outside the battery <NUM>.

As shown in <FIG> and <FIG>, the battery swap process of the battery swap apparatus <NUM> is as follows:.

In this embodiment, the battery swap process of a vehicle in which both batteries <NUM> are arranged transversely is used as an example to describe. In the vehicle in which both batteries <NUM> are arranged transversely, the length direction of the battery <NUM> is perpendicular to the length direction of the vehicle body, and the two batteries <NUM> are arranged along the length direction of the vehicle body. When the vehicle is parked on the battery swap platform <NUM>, the length direction of the vehicle body is perpendicular to the rail <NUM>, and the battery mounting position on the chassis is above the avoidance opening <NUM> of the battery swap platform <NUM>. The length direction of the vehicle body in this present application is the direction from a front of the vehicle to a rear of the vehicle. That is, when the vehicle is parked on the battery swap platform <NUM>, the front of the vehicle is located above one side of the rail <NUM>, the rear of the vehicle is located above the other side of the rail <NUM>, and the two batteries <NUM> are arranged along the direction from the front to the rear of the vehicle and connected to the battery mounting positions on the chassis, and the battery <NUM> is above the avoidance opening <NUM>.

Referring to <FIG>, the battery swap apparatus <NUM> moves along the rail <NUM> to the battery swap platform <NUM> without load until it moves below the avoidance opening <NUM> of the battery swap platform <NUM>, and then the driving member <NUM> drives the rotating base <NUM> to rotate by <NUM>°, and the two battery swap mechanisms <NUM> are adjusted in position, as shown in <FIG>, so that the two battery swap mechanisms <NUM> respectively correspond to the two battery mounting positions arranged transversely on the chassis.

Next, the lift assembly <NUM> lifts the locking and unlocking assembly <NUM>, the positioning member <NUM> on the locking and unlocking assembly <NUM> cooperates with the positioning structure (i.e., the second pin hole) on the chassis, the positioning member <NUM> is a pin with a conical end. When there is an error in the position of the locking and unlocking assembly <NUM>, an inner wall of the second pin hole acts on the conical portion of the pin and generates a guiding force, so that the base plate <NUM> moves horizontally relative to the mounting seat <NUM>, so that the second pin hole aligns with the pin, such that the locking and unlocking assembly <NUM> can be adjusted to the exact position adaptively.

The lift assembly <NUM> continues to lift, and the supporting member <NUM> on the locking and unlocking assembly <NUM> contacts the battery <NUM>. When the lift assembly <NUM> lifts into place, the battery <NUM> compresses the supporting member <NUM>, the locking and unlocking unit <NUM> cooperates with the fastening bolt <NUM> on the battery <NUM>, the locking and unlocking unit <NUM> screws the fastening bolt <NUM> out of the chassis to unlock the battery <NUM> to be charged.

As shown in <FIG>, after the unlocking assemblies <NUM> of the two battery swap mechanisms <NUM> unlock the batteries <NUM> respectively, the lift assembly <NUM> lowers, and the two battery swap mechanisms <NUM> carry the respective unlocked batteries <NUM> to be charged. Next, as shown in <FIG>, the driving member <NUM> drives the rotating base <NUM> to rotate by <NUM>° to adjust the positions of the two battery swap mechanisms <NUM>. The battery swap apparatus <NUM> moves toward the battery picking-and-placing apparatus <NUM> along the rail <NUM>.

As shown in <FIG>, the battery swap apparatus <NUM> is returned to the battery picking-and-placing apparatus <NUM> as a whole along the rail <NUM>. One of the battery swap mechanisms <NUM> is close to the working range of the fork <NUM> of the battery picking-and-placing apparatus <NUM>, and the fork <NUM> is inserted into the slot <NUM> of the protective enclosure <NUM> of the battery swap mechanism <NUM>, lifts the battery <NUM> to be charged up from the battery swap mechanism <NUM>, and places it back into the battery charging apparatus, and then places the fully charged battery <NUM> in the battery swap mechanism <NUM>. During the process of placing the fully charged battery <NUM>, the positioning member <NUM> on the locking and unlocking assembly <NUM> cooperates with the first pin hole <NUM> on the battery <NUM>. When there is an error in the position of the battery <NUM>, inner wall of the first pin hole <NUM> acts on conical portion of the pin and creates a guiding force, so that the base plate <NUM> moves horizontally relative to the mounting seat <NUM>, thereby aligning the first pin hole <NUM> with the pin, thereby enabling accurate positioning of the battery <NUM>.

Then, the driving member <NUM> drives the rotating base <NUM> to rotate by <NUM>°, and the two battery swap mechanisms <NUM> exchange positions, so that the other battery swap mechanism <NUM> is within the working range of the fork <NUM> of the battery picking-and-placing apparatus <NUM>, and the battery picking-and-placing apparatus <NUM> repeats the action to pick up the battery <NUM> to be charged from the other battery swap mechanism <NUM> and place the fully charged battery <NUM>.

After the two batteries <NUM> are updated, the battery swap apparatus <NUM> carries the two fully charged batteries <NUM> and moves along the rail <NUM> to the battery swap platform <NUM>, the driving member <NUM> drives the rotating base <NUM> to rotate by <NUM>°, and the two battery swap mechanisms <NUM> adjust their positions, such that the two battery swap mechanisms <NUM> correspond to the two battery mounting positions on the chassis, respectively again. The lift assembly <NUM> lifts the locking and unlocking assembly <NUM>, and the positioning member <NUM> cooperates with the second pin hole on the chassis to guide the locking and unlocking assembly <NUM> and the battery <NUM> to accurately locate relative to the chassis of the vehicle to ensure that the battery <NUM> enters the battery mounting position. Next, the locking and unlocking unit <NUM> drives the fastening bolt <NUM> on the battery <NUM> to cooperate with the movable nut <NUM> on the chassis to lock the battery <NUM>.

Claim 1:
A battery swap system (<NUM>), comprising: a battery picking-and-placing apparatus (<NUM>); and a battery swap apparatus (<NUM>) for replacing two batteries of an electrical device, comprising:
a movable base (<NUM>) configured to drive the battery swap apparatus (<NUM>) to move between the battery picking-and-placing apparatus and the bottom of the electrical device;
a first and a second battery swap mechanism (<NUM>) arranged on the movable base (<NUM>), the first and second battery swap mechanisms (<NUM>) being each configured to carry one of the two batteries so that the battery swap apparatus (<NUM>) carries the two batteries at the same time;
an exchange mechanism (<NUM>) arranged on the movable base (<NUM>), the exchange mechanism (<NUM>) being configured to drive the first and second battery swap mechanisms (<NUM>) to exchange positions; wherein during the battery swap:
the battery picking-and-placing apparatus (<NUM>) is configured to pick up the battery to be charged at the first battery swap mechanism (<NUM>) and to place a fully charged battery instead;
then, the exchange mechanism (<NUM>) is configured to drive the first and second battery swap mechanisms (<NUM>) to exchange positions;
then, the battery picking-and-placing apparatus (<NUM>) is configured to repeat the action to pick up the battery to be charged on the second battery swap mechanism (<NUM>) and to place a fully charged battery instead.