Patent Description:
With the development of power equipment, power tools or lighting devices have been increasingly used in different fields such as industry, construction, and garden machinery and people have higher and higher requirements for the power equipment. In the related art, the power equipment is generally powered by a battery pack or a built-in cell, and when the battery pack or the cell is exhausted, the power equipment can continue to operate only after the battery pack or the cell is fully charged. Secondly, portable equipment generally can only accept the input of external power, and an existing power tool needs to be equipped with a special charger for charging the battery pack so that in an emergency, the equipment cannot be adapted to the power supply of an external electronic device, thereby limiting the use of the equipment. In addition, the power tool needs to be equipped with a special adapter connected to the external electronic device. However, an existing charger and adapter have relatively complicated structures and relatively high manufacturing costs and are bulky and inconvenient to <CIT> and <CIT> disclose battery driven power tools.

To solve defects in the related art, an object of the present application is to provide an adapter and a combination of a battery pack and an adapter, which have relatively low costs, are convenient to carry, and can expand the use of a battery pack of a power tool.

To achieve the preceding object, the present application adopts technical solutions described below. Therefore, aspects of the invention are disclosed in independent claim <NUM>. The dependent claims disclose respective embodiments of the invention.

A power tool includes a power module, a direct current interface, and a two-way control module.

The power module includes a motor and a cell, where the motor is configured to drive an output unit to output power to an outside, and the cell supplies electric power to the motor.

The direct current interface is configured to be capable of being selectively connected to an external power consumption device or an external power supply device.

The two-way control module is connected in series between the direct current interface and the power module, where the two-way control module is configured to adjust electric power of the external power supply device according to a control signal of the direct current interface to form an electric power input adapted to the cell and/or the motor so that the external power supply device supplies power to the cell and/or the motor; or the two-way control module is configured to match a discharge voltage of the cell with a charge voltage required by the external power consumption device according to the control signal of the direct current interface so that the external power consumption device is charged.

Optioanlly, the two-way control module includes a voltage conversion circuit, a main controller, and a two-way power supply controller.

The voltage conversion circuit is connected to an adapter interface, where the voltage conversion circuit is configured to convert the electric power of the external power supply device into the electric power input adapted to the cell and/or the motor; or the voltage conversion circuit is configured to convert an electric power of the cell into an electric power output adapted to the external power consumption device.

The main controller is connected to the direct current interface, where the main controller is configured to output a control signal to a two-way power supply controller according to a state signal of the direct current interface and a state signal of the adapter interface.

The two-way power supply controller is connected to the voltage conversion circuit and the main controller, respectively, where the two-way power supply controller is configured to control a current direction and an output voltage of the voltage conversion circuit according to the control signal of the main controller so that the external power supply device supplies power to the cell and/or the motor or the cell is discharged to supply power to the external power consumption device.

Optionally, the main controller further includes a communication terminal communicatively connected to the motor, and the main controller controls the current direction of the voltage conversion circuit according to communication information of the motor so that the external power supply device supplies power to the motor.

Optionally, the direct current interface includes a detection terminal and an electric power terminal, where the detection terminal detects the state signal of the direct current interface, and the electric power terminal is configured to output or input electric power.

Optionally, the electric power terminal includes at least two power positive terminals, where the at least two power positive terminals are connected to a positive electrode of the external power consumption device or a positive electrode of the external power supply device.

Optionally, the state signal includes at least a charge signal and a discharge signal.

Optionally, in the case where the direct current interface is connected to the external power supply device, the detection terminal detects the charge signal of the direct current interface and sends a charge control signal to the main controller so that the main controller controls the current direction of the voltage conversion circuit and thus the external power supply device charges the cell.

Optionally, in the case where the detection terminal detects a high level, it is determined that the direct current interface receives the charge signal.

Optionally, in the case where the direct current interface is connected to the external power consumption device, the detection terminal detects the discharge signal of the direct current interface and sends a discharge control signal to the main controller so that the main controller controls the current direction of the voltage conversion circuit and thus the cell is discharged to supply power to the external power consumption device.

Optionally, in the case where the detection terminal detects a low level, it is determined that the direct current interface receives the discharge signal.

The present application has beneficial effects described below.

The power tool in the present application is provided with the direct current interface and the two-way control module, which expands the use of the power tool and is convenient for a user to use. It is to be understood that since a design circuit architecture of the two-way power supply controller is adopted in the power tool, the charge and discharge control can be achieved through the same controller, which reduces the introduction of other operational amplifier circuits and simplifies the circuit structure.

The present application will be described below in detail in conjunction with drawings and embodiments.

As shown in <FIG>, a combination of a battery pack <NUM> and a tool lamp <NUM> in an embodiment of the present application includes the battery pack <NUM> and the tool lamp <NUM>. The battery pack <NUM> is configured to supply power to the tool lamp <NUM> and includes a cell for storing electric power and at least one battery pack interface <NUM> that can be detachably connected to the tool lamp <NUM>, where the battery pack interface <NUM> is provided with a battery pack terminal electrically connected to the tool lamp <NUM>.

As shown in <FIG>, the tool lamp <NUM> is specifically a hand-held lighting lamp. Referring to <FIG>, the tool lamp <NUM> includes a lighting module <NUM>, an adapter interface <NUM>, a direct current interface <NUM>, and a circuit board unit <NUM>.

The lighting module <NUM> is a light-emitting diode (LED) light-emitting module. Of course, the lighting module <NUM> may also be configured to be other light-emitting units, as long as a lighting function is satisfied, which is not limited herein.

The adapter interface <NUM> is configured to be detachably connected to the battery pack interface <NUM> of the battery pack <NUM>. The adapter interface <NUM> includes an adapter positive terminal <NUM>, an adapter negative terminal <NUM>, and an adapter communication terminal <NUM>, where the adapter positive terminal <NUM> and the adapter negative terminal <NUM> are electrically connected to the battery pack terminal.

Referring to <FIG>, the direct current interface <NUM> is configured to be capable of being selectively connected to an external power consumption device or an external power supply device. In the case where the direct current interface <NUM> is in a charge state, electric power from the external power supply device is received; and in the case where the direct current interface <NUM> is in a discharge state, electric power of the battery pack <NUM> is supplied to the external power consumption device.

The direct current interface <NUM> includes a detection terminal <NUM> and an electric power terminal, where the detection terminal <NUM> detects a state signal of the direct current interface <NUM>, and the electric power terminal is configured to output or input electric power.

The electric power terminal of the direct current interface <NUM> includes at least two power positive terminals. Two power positive terminals are a first electric power terminal <NUM> and a second electric power terminal <NUM>, respectively, such as Vbus1 and Vbus2. The first electric power terminal <NUM> and the second electric power terminal <NUM> can be connected to a positive terminal of the external power consumption device or a positive terminal of the external power supply device and are configured to input or output electric power.

The output or input power of the direct current interface is P, where P ≤ <NUM> W; or <NUM> W ≤ P ≤ <NUM> W; or <NUM> W ≤ P ≤ <NUM> W.

The output or input voltage of the direct current interface is U, where U ≤ <NUM> V; or <NUM> V ≤ U ≤ <NUM> V; <NUM> V ≤ U ≤ 100V.

The direct current interface <NUM> further includes the detection terminal <NUM> such as CC1. The detection terminal <NUM> is configured to detect the state signal of the direct current interface <NUM>, where the direct current interface <NUM> has the charge state, the discharge state, and an empty state.

Specifically, in the case where the direct current interface <NUM> is connected to the external power supply device, the detection terminal <NUM> detects a high level, the external power supply device is equivalent to a pull-up resistor, it is determined that the direct current interface <NUM> is a power supply side, the battery pack <NUM> is equivalent to a pull-down resistor and determined as a power receiving side, and the detection terminal <NUM> determines that the direct current interface <NUM> is in the charge state and sends a charge control signal to the circuit board unit <NUM> so that the external power supply device charges the battery pack <NUM>.

In the case where the direct current interface <NUM> is connected to the external power consumption device, the detection terminal <NUM> detects a low level, the external power consumption device is equivalent to a pull-down resistor, it is determined that the direct current interface <NUM> is a power receiving side, the battery pack <NUM> is equivalent to a pull-up resistor and determined as a power supply side, and the detection terminal <NUM> determines that the direct current interface <NUM> is in the discharge state and sends a discharge control signal to the circuit board unit <NUM> so that the battery pack <NUM> is discharged to supply power to the external power consumption device.

The circuit board unit <NUM> is connected in series between the adapter interface <NUM> and the direct current interface <NUM>; the circuit board unit <NUM> includes a two-way control module and a one-way control module. The circuit board unit <NUM> may be one circuit board or may be integrated by multiple circuit boards, which is not limited herein.

The two-way control module is connected in series between the direct current interface <NUM> and the adapter interface <NUM>, where the two-way control module is configured to adjust electric power of the external power supply device according to a control signal of the direct current interface <NUM> to form an electric power input adapted to the battery pack <NUM> so that the external power supply device charges the battery pack <NUM>; or the two-way control module is configured to match a discharge voltage of the battery pack <NUM> with a power supply voltage required by the external power consumption device according to the control signal of the direct current interface <NUM> so that the external power consumption device is powered.

As a specific embodiment, the two-way control module includes a main controller <NUM>, a two-way power supply controller <NUM>, and a voltage conversion circuit <NUM> that are disposed on the circuit board unit <NUM>.

In the case where the direct current interface <NUM> is connected to the external power supply device, the detection terminal <NUM> detects a charge signal and determines that the direct current interface <NUM> is in the charge state, and the detection terminal <NUM> sends the charge control signal to the main controller <NUM>; the main controller <NUM> outputs a control signal to the two-way power supply controller <NUM> according to the charge control signal; the two-way power supply controller <NUM> receives the control signal from the main controller <NUM> and outputs a power supply control signal to the voltage conversion circuit <NUM> to control a current direction of the voltage conversion circuit <NUM> and control the voltage conversion circuit <NUM> to adjust the electric power of the external power supply device to form the electric power input adapted to the battery pack <NUM> so that the external power supply device supplies power to the battery pack <NUM>.

The main controller <NUM> can also receive related communication signals from the communication terminal <NUM> of the battery pack <NUM> to send power supply information adapted to the battery pack <NUM> to the main controller <NUM>, such as voltage and current information. The main controller <NUM> sends the control signal to the two-way power supply controller <NUM> according to the power supply information, and finally, the two-way power supply controller <NUM> outputs the power supply control signal to the voltage conversion circuit <NUM> to adjust electric power input by the external power supply device to the battery pack <NUM>.

In the case where the direct current interface <NUM> is connected to the external power consumption device, the detection terminal <NUM> detects a direction signal and determines that the direct current interface <NUM> is in the discharge state, and the detection terminal <NUM> sends the discharge control signal to the main controller <NUM>; the main controller <NUM> outputs a control signal to the two-way power supply controller <NUM> according to the discharge control signal; the two-way power supply controller <NUM> receives the control signal from the main controller <NUM> and outputs a power supply control signal to the voltage conversion circuit <NUM> to control a current direction of the voltage conversion circuit <NUM>, and the voltage conversion circuit <NUM> matches the discharge voltage of the battery pack <NUM> with the power supply voltage required by the external power consumption device so that the external power consumption device is powered.

In this manner, an external power supply device of a smartphone or a laptop available on site may be used to supply power to the battery pack <NUM> through the direct current interface, and the battery pack <NUM> may also output the electric power stored in the cell to supply power to an external power consumption device such as the smartphone or the laptop. It is to be understood that the power supply includes a case where electric power is directly supplied to the external power consumption device for its use and a case where the external power consumption device is charged.

The tool lamp in the present application is provided with the direct current interface, the two-way control module, and the one-way control module, which expands the use of the tool lamp and is convenient for a user to use. It is to be understood that since a design circuit architecture of the two-way power supply controller is adopted in the tool lamp, the charge and discharge control can be achieved through the same controller, which reduces the introduction of other operational amplifier circuits and simplifies the circuit structure.

The one-way control module is connected in series between the direct current interface <NUM> and the lighting module <NUM> and connected in series between the adapter interface <NUM> and the lighting module <NUM>, where the one-way control module is configured to convert the electric power of the external power supply device or the electric power of the battery pack <NUM> into an electric power input adapted to the lighting module <NUM>.

The one-way control module includes a one-way power supply controller <NUM> disposed on the circuit board unit <NUM> and connected in series between the direct current interface <NUM> and the lighting module <NUM>. In the case where the direct current interface <NUM> is connected to the external power supply device, the one-way power supply controller <NUM> receives and adjusts the electric power from the external power supply device to form the electric power input adapted to the lighting module <NUM> so that the external power supply device supplies power to the lighting tool <NUM>.

The one-way power supply controller <NUM> is also connected in series between the voltage conversion circuit <NUM> and the lighting module <NUM>. In the case where the adapter interface <NUM> is connected to the battery pack <NUM>, the one-way power supply controller <NUM> receives and adjusts the electric power of the battery pack <NUM> to form the electric power input adapted to the lighting module <NUM> so that the battery pack <NUM> supplies power to the lighting tool <NUM>.

It is to be understood that the tool lamp may be connected to the external power supply device or the external power consumption device through an adapter, and the adapter can make the tool lamp output electric power and can also supply electric power to charge the tool lamp and/or the battery pack. As shown in <FIG>, the adapter may include a power plug and an output interface; of course, the adapter may also include an input interface and an output interface that are configured to be connected to the tool lamp and the external power supply device or the external power consumption device, respectively.

An operation process of the tool lamp in the present application is described below.

If the battery pack <NUM> is not connected to the adapter interface <NUM>, the external power supply device supplies power to the lighting module <NUM> through the one-way control module, and the lighting module <NUM> can perform lighting. In this case, the adapter interface <NUM> is not powered on.

If the battery pack <NUM> is connected to the adapter interface <NUM>, the main controller <NUM> receives a signal from the adapter communication terminal <NUM> of the battery pack <NUM>, the external power supply device supplies power to the lighting module <NUM> through the one-way control module, and the external power supply device charges the battery pack <NUM> through the two-way control module. For a process of charging the battery pack <NUM> by the external power supply device, reference may be made to the preceding related description, which is not repeated herein.

B: the case where the direct current interface is connected to the external power consumption device.

In this case, the battery pack <NUM> is connected to the adapter interface <NUM>, and the battery pack <NUM> supplies power to the external power consumption device through the two-way control module; when there is a requirement for lighting, the battery pack <NUM> can also supply power to the lighting module <NUM> through the one-way control module, and the lighting module <NUM> can perform lighting.

C: the case where no device is connected to the direct current interface.

In this case, the battery pack <NUM> supplies power to the lighting module <NUM>. In the case where the battery pack <NUM> is connected to the adapter interface <NUM>, the lighting module <NUM> can perform lighting.

As shown in <FIG>, a power tool <NUM> in another embodiment of the present application is provided. Referring to <FIG>, the power tool <NUM> includes a power module, an output unit (not shown in the figure), a cell <NUM>, a direct current interface <NUM>, and a two-way control module <NUM>.

As shown in <FIG>, the powre tool <NUM> is a hand-held power tool such as an electric drill, a screwdriver, a nail gun, a wrench, and an angle grinder. Although this embodiment relates to a hand-held power tool, it is to be understood that the present application is not limited to the disclosed embodiment and can be applied to other types of power tools, including but not limited to garden power tools such as a vehicle-type lawn mower and a hair dryer.

Referring to <FIG>, the power module includes a motor <NUM> and the cell <NUM>. The motor <NUM> may be powered by the cell <NUM> or an external power supply device. The motor <NUM> is configured to drive the output unit to output power to an outside. For example, in the case where the power tool is the screwdriver, an output mechanism is an output shaft driven by the motor.

The cell <NUM> is configured to store power and can be repeatedly charged and discharged; the cell <NUM> may be a lithium-ion battery or a graphene battery.

The direct current interface <NUM> is configured to be capable of being selectively connected to an external power consumption device or an external power supply device. In the case where the direct current interface <NUM> is in a charge state, electric power from the external power supply device is received; and in the case where the direct current interface <NUM> is in a discharge state, electric power of the cell <NUM> is supplied to the external power consumption device.

Referring to <FIG>, the direct current interface <NUM> includes a detection terminal <NUM> and an electric power terminal, where the electric power terminal is configured to output or input electric power. The electric power terminal of the direct current interface <NUM> includes at least two power positive terminals. Two power positive terminals are a first electric power terminal <NUM> and a second electric power terminal <NUM>, respectively, such as Vbus1 and Vbus2. The first electric power terminal <NUM> and the second electric power terminal <NUM> can be connected to a positive terminal of the external power consumption device or a positive terminal of the external power supply device and are configured to input or output electric power.

The direct current interface <NUM> further includes the detection terminal <NUM> such as CC1; the detection terminal <NUM> detects a state signal of the direct current interface <NUM>. The detection terminal <NUM> is configured to detect the state signal of the direct current interface <NUM>, where the direct current interface <NUM> has the charge state, the discharge state, and an empty state.

Specifically, in the case where the direct current interface <NUM> is connected to the external power supply device, the detection terminal <NUM> detects a high level, the external power supply device is equivalent to a pull-up resistor, it is determined that the direct current interface <NUM> is a power supply side, the cell <NUM> is equivalent to a pull-down resistor and determined as a power receiving side, and the detection terminal <NUM> determines that the direct current interface <NUM> is in the charge state and sends a charge control signal to the two-way control module <NUM> so that the external power supply device charges the cell <NUM>.

In the case where the direct current interface <NUM> is connected to the external power consumption device, the detection terminal <NUM> detects a low level, the external power consumption device is equivalent to a pull-down resistor, it is determined that the direct current interface <NUM> is a power receiving side, the cell <NUM> is equivalent to a pull-up resistor and determined as a power supply side, and the detection terminal <NUM> determines that the direct current interface <NUM> is in the discharge state and sends a discharge control signal to the two-way control module <NUM> so that the cell <NUM> is discharged to supply power to the external power consumption device.

The two-way control module <NUM> is connected in series between the power module <NUM> and the direct current interface <NUM>, where the two-way control module is configured to adjust electric power of the external power supply device according to a control signal of the direct current interface <NUM> to form an electric power input adapted to the cell <NUM> so that the external power supply device charges the cell <NUM>; or the two-way control module is configured to adjust the electric power of the external power supply device according to a signal of the motor <NUM> to form an electric power input adapted to the motor <NUM> so that the external power supply device supplies power to the motor <NUM>; the two-way control module <NUM> may also be configured to match a discharge voltage of the cell <NUM> with a power supply voltage required by the external power consumption device according to the control signal of the direct current interface <NUM> so that the external power consumption device is powered.

As a specific embodiment, the two-way control module may be one circuit board or may be integrated by multiple circuit boards, which is not limited herein. The two-way control module in the present application includes a main controller <NUM>, a two-way power supply controller <NUM>, and a voltage conversion circuit <NUM> that are disposed on a circuit board.

Specifically, in the case where the direct current interface <NUM> is connected to the external power supply device, the detection terminal <NUM> detects a charge signal and determines that the direct current interface <NUM> is in the charge state, and the detection terminal <NUM> sends the charge control signal to the main controller <NUM>. The main controller <NUM> outputs a control signal to the two-way power supply controller <NUM> according to the charge control signal; the two-way power supply controller <NUM> receives the control signal from the main controller <NUM> and outputs a power supply control signal to the voltage conversion circuit <NUM> to control a current direction of the voltage conversion circuit <NUM> and control the voltage conversion circuit <NUM> to adjust the electric power of the external power supply device to form an electric power output adapted to the cell <NUM> or the motor <NUM> so that the external power supply device supplies power to the cell <NUM> or the motor <NUM>.

It is to be understood that the main controller <NUM> further includes a communication terminal communicatively connected to the motor, and the main controller <NUM> can receive a communication signal from the motor <NUM> to send power supply information adapted to the motor <NUM> to the main controller <NUM>, such as voltage and current information; the main controller <NUM> sends the control signal to the two-way power supply controller <NUM> according to the power supply information, and finally, the two-way power supply controller <NUM> outputs the power supply control signal to the voltage conversion circuit <NUM> to adjust electric power input by the external power supply device to the motor <NUM>.

In the case where the direct current interface <NUM> is connected to the external power consumption device, the detection terminal <NUM> detects a discharge signal and determines that the direct current interface <NUM> is in the discharge state, the detection terminal <NUM> sends the discharge control signal to the main controller <NUM>, and the main controller <NUM> outputs the control signal to the two-way power supply controller <NUM> according to the discharge control signal. The two-way power supply controller <NUM> receives the control signal and controls the current direction of the voltage conversion circuit <NUM>, and the voltage conversion circuit <NUM> matches the discharge voltage of the cell <NUM> with the power supply voltage required by the external power consumption device so that the external power consumption device is powered.

In this manner, an external power supply device of a smartphone or a laptop available on site may be used to charge the battery pack <NUM> through the direct current interface, and the battery pack <NUM> may also output the electric power stored in the cell to supply power to an external power consumption device such as the smartphone or the laptop. It is to be understood that the power supply includes a case where electric power is directly supplied to the external power consumption device for its use and a case where the external power consumption device is charged.

It is to be understood that the power tool may be connected to the external power supply device or the external power consumption device through an adapter, and the adapter can make the battery pack output electric power and can also supply electric power to charge the power tool and/or the cell. As shown in <FIG>, the adapter may include a power plug and an output interface; of course, the adapter may also include an input interface and an output interface that are configured to be connected to the power tool and the external power supply device or the external power consumption device, respectively.

An operation process of the power tool in the present application is described below.

The main controller <NUM> receives a signal from the communication terminal of the motor <NUM>, the external power supply device supplies power to the motor <NUM> through the two-way control module, and the external power supply module may also charge the cell <NUM> through the two-way control module <NUM>. For a process of supplying power to the cell or the motor by the external power supply device, reference may be made to the preceding related description, which is not repeated herein.

Of course, in the case where the direct current interface <NUM> is connected to the external power supply device, the external power supply device may be configured to only supply power to the motor or only charge the cell. The preceding configuration may be implemented by a predetermined program set on the main controller <NUM>.

In this case, the cell <NUM> supplies power to the external power consumption device through the two-way control module <NUM>; and the cell <NUM> may also supply power to the motor, and the power tool <NUM> can operate normally.

In this case, the cell <NUM> supplies power to the motor <NUM>, and the power tool can operate normally.

Claim 1:
A power tool (<NUM>), comprising:
a power module (<NUM>) comprising a motor (<NUM>), wherein the motor (<NUM>) is configured to drive an output unit to output power to an outside;
a direct current interface (<NUM>) configured to be capable of being connected to an external power supply device; and
a two-way control module (<NUM>) connected in series between the direct current interface (<NUM>) and the power module (<NUM>), wherein the two-way control module (<NUM>) is configured to adjust electric power of the external power supply device according to a control signal (<NUM>) of the direct current interface (<NUM>) to form an electric power input adapted to a cell (<NUM>) and/or the motor (<NUM>) when said direct current interface (<NUM>) is connected to said external power supply device, so that the external power supply device supplies power to the cell (<NUM>) and/or the motor (<NUM>), wherein said cell (<NUM>) supplies electric power to said motor (<NUM>);
characterized in that
said power module (<NUM>) comprises said cell (<NUM>);
said direct current interface (<NUM>) is configured to be selectively connectable to said external power supply device or an external power consumption device;
wherein the two-way control module (<NUM>) is configured to match a discharge voltage of the cell (<NUM>) with a power supply voltage required by the external power consumption device according to the control signal (<NUM>) of the direct current interface (<NUM>) when said direct current interface (<NUM>) is connected to said external power consumption device, so that the external power consumption device is powered.