CN215580414U

CN215580414U - Direct current power supply

Info

Publication number: CN215580414U
Application number: CN202120558005.1U
Authority: CN
Inventors: 何明明; 陈小勇
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2020-03-18
Filing date: 2021-03-18
Publication date: 2022-01-18
Anticipated expiration: 2031-03-18
Also published as: CN216928756U; CN113497473B; WO2021185307A1; CN217589271U; CN113497473A; CN113497471B; CN113497471A

Abstract

The utility model relates to a direct current power supply which can supply power to an electric tool, and the direct current power supply comprises: the energy storage module is used for setting the nominal full charge voltage as a first preset voltage; the electronic equipment interface receives the input of an external power supply; the power supply input by the electronic equipment interface is lower than the first preset voltage; the charging circuit is connected with the electronic equipment interface, and is used for lifting a power supply input by the electronic equipment interface to the first preset voltage to charge the energy storage module; and when the charging circuit judges that the energy storage module is full and stops charging, the capacity received by the energy storage module reaches more than 80% of the nominal capacity. The utility model can fully charge the DC power supply by using the lower charging voltage even if the charging voltage output by the external electronic equipment charger is lower than the full charging voltage of the DC equipment.

Description

Direct current power supply

Technical Field

The utility model relates to a direct current power supply, in particular to a direct current power supply for an electric tool.

Background

The dc power supply for the electric power tool already available on the market is generally charged only by the charger for the electric power tool. Such a charger is characterized in that the voltage output to the dc power supply must be higher than the full charge voltage of the dc power supply. At present, household electronic equipment is very common, the charger of the household electronic equipment such as a mobile phone, a tablet personal computer, a notebook computer and the like can output charging voltage of 5-20V, and the direct current power supply for the electric tool generally requires the charging voltage of more than 20V due to the requirement of high-power use, so that the direct current power supply for the electric tool cannot be charged by the household electronic equipment charger.

Disclosure of Invention

The utility model provides a DC power supply for an electric tool, which can fully charge the DC power supply with a lower charging voltage even if the charging voltage output by an external electronic equipment charger is lower than the full charging voltage of the DC power supply.

A dc power supply operable to power a power tool, the dc power supply comprising: the energy storage module is used for setting the nominal full charge voltage as a first preset voltage; the electronic equipment interface receives the input of an external power supply; the power supply input by the electronic equipment interface is lower than the first preset voltage; the charging circuit is connected with the electronic equipment interface, and is used for raising the power supply voltage input by the electronic equipment interface to the first preset voltage to charge the energy storage module; and when the energy storage module finishes charging, the charging capacity of the energy storage module reaches more than 80% of the nominal capacity of the energy storage module.

Optionally, the charging circuit includes a main control module, and a first charging branch and a second charging branch which are connected in parallel, the first charging branch directly outputs the power voltage input by the electronic device interface to the energy storage module, the second charging branch boosts the power voltage input by the electronic device interface to the first preset voltage and then outputs the first preset voltage to the energy storage module, and the main control module monitors the charging state of the energy storage module and controls the first charging branch and the second charging branch to be selectively switched on according to the charging state.

Optionally, the second charging branch comprises a first switch and a DC-DC circuit connected in series; the controlled end of the first switch is connected with the main control module and used for conducting the DC-DC circuit when the main control module controls the conduction of the main control module so as to boost the power supply voltage input by the electronic equipment interface to the first preset voltage.

Optionally, the main control module is configured to monitor a charging current of the energy storage module and a real-time voltage of the energy storage module, and determine that the energy storage module is full when the charging current reaches a first preset current or the real-time voltage reaches the first preset voltage.

Optionally, the main control module is configured to control the second charging branch to be turned on when charging is started.

Optionally, after charging is started, the main control module is further configured to monitor a power supply voltage input by the electronic device interface, and when the power supply voltage is greater than the real-time voltage, the first charging branch is controlled to be switched on.

Optionally, the main control module is further configured to control switching of the conduction of the second charging branch when the first charging branch is conducted and the charging current reaches a second preset current; wherein the electrical second predetermined current is greater than the first predetermined current.

Optionally, the main control module is further configured to control switching of the conduction of the second charging branch when the first charging branch is conducted and the real-time voltage reaches a second preset voltage; wherein the second preset voltage is less than the first preset voltage.

Optionally, the main control module is further configured to control the second charging branch to be turned on when the first charging branch is turned on, the real-time voltage reaches a second preset voltage, and the charging current reaches the second charging current; the second preset current is greater than the first preset current, and the second preset voltage is less than the first preset voltage.

Optionally, in the dc power supply of any one of the above embodiments, the electronic device interface is a USB TYPE-C interface.

The present invention also provides another dc power supply for supplying power to a power tool, the dc power supply comprising: the energy storage module is used for setting the nominal full charge voltage as a first preset voltage; the electronic equipment interface receives the input of an external power supply; the charging circuit is connected with the electronic equipment interface, converts a power supply input by the electronic equipment interface into a power supply suitable for charging the energy storage module and charges the energy storage module; when the charging circuit judges that the energy storage module is full and stops charging, the capacity received by the energy storage module reaches more than 80% of the nominal capacity of the energy storage module.

Optionally, the charging circuit includes a voltage boost circuit, and the voltage boost circuit boosts the power supply input by the electronic device interface to the first preset voltage.

Optionally, the charging circuit includes a main control module, and a first charging branch and a second charging branch which are connected in parallel, the first charging branch directly outputs the power input by the electronic device interface to the energy storage module, the second charging branch outputs the power input by the electronic device interface to the energy storage module after boosting through the boosting circuit, the main control module detects the charging state of the direct current power supply, and controls the first charging circuit and the second charging circuit to be selectively switched on according to the charging state.

Optionally, when the charging current is greater than a preset value, the main control module controls the first charging branch to be conducted, and when the charging current is not greater than the preset value, the main control module controls the second charging branch to be conducted.

Optionally, the boost circuit is implemented by a dedicated charging chip, and the charging current output by the dedicated charging chip is smaller than the ratio of the capacity of the dc power supply to the hour.

Optionally, the dc power supply is a battery pack, and the battery pack is detachably connected to the electric tool and supplies power to the electric tool.

Optionally, the battery pack includes adapter and battery module, the battery module with the detachable cooperation of adapter.

Optionally, the dc power supply is a battery module for forming a battery pack, the battery pack is detachably connected to the electric tool, the electric tool supplies power, and the battery module comprises a shell and an electric core group accommodated in the shell.

Optionally, the electronic device interface is disposed on the battery module.

Optionally, the electronic device interface is a USB TYPE-C interface, the input voltage of the USB TYPE-C interface is 20V, and the first preset voltage is between 20V and 21V.

The present invention also provides a third dc power supply for powering an electric tool, the dc power supply comprising: the energy storage module is used for outputting the highest voltage which is a first preset voltage; the electronic equipment interface receives the input of an external power supply; the charging circuit is connected with the electronic equipment interface, converts a power supply input by the electronic equipment interface into a power supply suitable for charging the energy storage module and charges the energy storage module; the power input by the electronic equipment interface is not higher than 80% of the first preset voltage, and the direct current power supply can fully charge more than 80% of the capacity of the direct current power supply when charging is finished.

Preferably, the charging circuit includes a voltage boost circuit, and the voltage boost circuit boosts the power supply input by the electronic device interface to above the first preset voltage.

Preferably, the charging circuit comprises a main control module, a first charging branch and a second charging branch which are connected in parallel, the first charging branch directly outputs the power input by the electronic device interface to the energy storage module, the second charging branch outputs the power input by the electronic device interface to the energy storage module after boosting through the boosting circuit, the main control module detects the charging state of the direct-current power supply, and controls the first charging circuit and the second charging circuit to be selected and switched on according to the charging state.

Preferably, when the charging current is greater than a preset value, the main control module controls the first charging branch circuit to be conducted, and when the charging current is not greater than the preset value, the main control module controls the second charging branch circuit to be conducted.

Preferably, the boost circuit is implemented by a dedicated charging chip, and the time required for the dedicated charging chip to fully charge the energy storage module is longer than 1 hour.

Preferably, the dc power supply is a battery pack, and the battery pack is detachably connected to the electric tool to supply power to the electric tool.

Preferably, the battery pack comprises an adapter and a battery module, and the battery module is detachably matched with the adapter.

Preferably, the dc power supply is a battery module, the battery module is detachably connected to an adapter, and the adapter is detachably connected to the electric tool to supply power to the electric tool.

Preferably, the electronic device interface is a USB TYPE-C interface, the input voltage of the USB TYPE-C interface is 20V, and the first preset voltage is between 20V and 21V.

The direct current power supply provided by the utility model can receive the output of an external electronic equipment charger to charge the direct current power supply, and can fully charge the capacity of the direct current power supply to more than 80% of the nominal capacity even if the charging voltage output by the charger is lower than the full charging voltage of the direct current power supply.

The present invention also provides an adapter, comprising: the tool power supply terminal group is detachably matched with the electric tool; the adapter first power terminal group is detachably connected with the first battery module and used for supplying the electric energy of the first battery module to the electric tool; the adapter second power terminal group is connected with the adapter first power terminal group in parallel, is detachably matched with the second battery module, and provides the electric power of the second battery module to the electric tool; the adapter also comprises a first switch component, a second switch component and a main control module; the first switch assembly is disposed between the adapter first power terminal set and the tool power terminal set, and the second switch assembly is disposed between the adapter second power terminal set and the tool power terminal set; the main control module obtains a voltage difference value between the voltage of the first battery module and the voltage of the second battery module, and controls the first switch assembly and the second switch assembly to be closed when the voltage difference value is smaller than a preset voltage value.

Optionally, the main control module obtains a voltage of the first battery module and a voltage of the second battery module, and obtains the voltage difference according to the voltage of the first battery module and the voltage of the second battery module.

Optionally, the adapter includes a first signal terminal group of the adapter and a second signal terminal group of the adapter, and receives state information of the first battery module and the second battery module respectively, and the main control module obtains voltage values of the first battery module and the second battery module according to the state information obtained by the first signal terminal group of the adapter and the second signal terminal group of the adapter.

Optionally, the main control module controls the first switch assembly to be closed and the second switch assembly to be opened, the voltage value of the first battery module is acquired through the first power terminal group of the adapter, the main control module controls the first switch assembly to be opened and the second switch assembly to be closed, and the voltage value of the second battery module is acquired through the second power terminal group of the adapter.

Optionally, the main control module obtains a voltage difference between two ends of the first switch assembly and a voltage difference between two ends of the second switch assembly, and obtains a voltage difference between a voltage of the first battery module and a voltage of the second battery module according to the voltage difference between the two ends of the first switch assembly and the voltage difference between the two ends of the second switch assembly.

Optionally, the main control module determines that the voltage difference exceeds a preset voltage value, and controls the first switch assembly to be closed and the second switch assembly to be opened when the voltage of the first battery module is higher than the voltage of the second battery module.

Optionally, the main control module determines that the voltage difference exceeds a preset voltage value, and controls the first switch assembly to be closed and the second switch assembly to be intermittently closed when the voltage of the first battery module is higher than the voltage of the second battery module.

Optionally, the first switch component includes two P-MOS transistors, and the two transistors are connected in series.

Optionally, the adapter further includes a tool signal terminal group detachably connected to the electric tool, and a power-on self-locking circuit arranged between the main control module and the first power terminal group of the adapter and the second power terminal group of the adapter, wherein the power-on self-locking circuit includes an open state and a closed state, the main control module is in a power-off state and enters a sleep mode, the main control module is in a power-on state and starts working in the closed state, when the starting switch of the electric tool is closed, the tool signal terminal group receives a trigger signal, and the power-on self-locking circuit is switched from the open state to the closed state.

Optionally, when the main control module determines that the second power terminal group of the adapter is not connected to the second battery module, the first switch assembly is controlled to be closed, and the second switch assembly is controlled to be opened.

Correspondingly, the utility model also provides a battery pack, which comprises a first battery module, a second battery module and the adapter, wherein the first battery module is detachably mounted on the adapter and comprises a first battery module power terminal group connected with the first power terminal group of the adapter; and the second battery module is detachably arranged on the adapter and comprises a second battery module power terminal group connected with the second power terminal group of the adapter.

Correspondingly, the utility model also provides an electric tool, which comprises a motor, a starting switch and a battery pack for supplying power to the motor, wherein the battery pack is as described above, and when the starting switch is closed, the motor acquires the electric energy of the battery pack and starts to work.

The adapter, the battery pack and the electric tool provided by the utility model have the advantages that when the plurality of battery modules are discharged in parallel by the control circuit in the adapter, the potential safety hazard caused by mutual charging due to voltage difference can be avoided. Meanwhile, the control circuit in the adapter can automatically enter a low-power-consumption state when the adapter does not need to work, and the electric energy of the battery module is prevented from being excessively consumed.

The present invention also provides another adapter, comprising: the tool power supply terminal group is detachably matched with the electric tool; the first power terminal group of the adapter and the first signal terminal group of the adapter are detachably connected with the first battery module and provide the electric energy of the first battery module to the electric tool, and the first battery module comprises a first charging power module for receiving external charging energy to charge the first battery module; the second power terminal group of the adapter and the second signal terminal group of the adapter are detachably connected with the second battery module and provide the electric energy of the second battery module to the electric tool, and the second battery module comprises a second charging power module for receiving external charging energy to charge the second battery module; the adapter also comprises a switch assembly and a main control module; the first power supply terminal group of the adapter and the second power supply terminal group of the adapter are connected in parallel through the switch assembly; when one of the first charging power supply module and the second charging power supply module receives external charging energy input, the first signal terminal group of the adapter or the second signal terminal group of the adapter receives a trigger signal from the first battery module or the second battery module, and the main control module controls the switch assembly to be closed.

Optionally, before the main control module controls the switch assembly to be closed, the voltage of the first battery module and the voltage of the second battery module are obtained, whether the voltage of the first battery module and the voltage of the second battery module meet preset conditions is judged, and when the judgment result is yes, the switch assembly is controlled to be closed; and when the judgment result is negative, controlling the switch assembly to be switched off.

Optionally, when the main control module determines that the trigger signal is from the first battery module signal terminal group, the preset condition is whether the voltage of the first battery module is not lower than the voltage of the second battery module, and when the main control module determines that the start signal is from the second battery module signal terminal group, the preset condition is whether the voltage of the second battery module is not lower than the voltage of the first battery module.

Optionally, the switch assembly includes a first switch assembly and a second switch assembly, the first switch assembly is disposed between the first power terminal group of the adapter and the tool power terminal group, the second switch assembly is disposed between the first power terminal group of the adapter and the tool power terminal group, and the first power terminal group of the adapter and the second power terminal group of the adapter are connected in parallel via the first switch assembly and the second switch assembly.

Optionally, the main control module controls the first switch assembly to be closed and the second switch assembly to be opened, the voltage value of the first battery module is obtained through the first battery module power terminal group, the main control module controls the first switch assembly to be opened and the second switch assembly to be closed, and the voltage value of the second battery module is obtained through the second battery module power terminal group.

Optionally, when the main control module determines that the trigger signal is from the first battery module signal terminal group and the main control module determines that the second battery module is fully charged according to the signal transmitted by the second battery module signal terminal, the main control module controls the switch assembly to be switched off; and when the main control module judges that the trigger signal comes from the second battery module signal terminal group and the main control module judges that the first battery module is full of charge according to the signal transmitted by the first battery module signal terminal, the main control module controls the switch assembly to be switched off.

Optionally, the adapter further includes a power-on self-locking circuit disposed between the first power terminal group of the adapter and the second power terminal group of the adapter and the main control module, the power-on self-locking circuit is in an off state when not receiving a trigger signal of the first signal terminal group of the adapter or the second signal terminal group of the adapter, the main control module is in a power-off state and enters a sleep mode, the power-on self-locking circuit is in a closed state when receiving the trigger signal of the first signal terminal group of the adapter or the second signal terminal group of the adapter, and the main control module is in a power-on state and starts to work.

Optionally, when the main control module determines that the trigger signal is from the first battery module and the second battery module is not connected, the main control module controls the power-on self-locking module to be switched from a closed state to an open state.

Correspondingly, the utility model also provides a battery pack, which comprises a first battery module, a second battery module and the adapter, wherein the first battery module is detachably mounted on the adapter and comprises a first battery module power terminal group connected with the first power terminal group of the adapter, a first battery module signal terminal group connected with the first signal terminal group of the adapter and a first charging power module for receiving external charging energy to charge the first battery module; the second battery module is detachably installed on the adapter and comprises a second battery module power terminal group connected with the second power terminal group of the adapter, a second battery module signal terminal group connected with the second signal terminal group of the adapter and a second charging power module for receiving external charging energy to charge the second battery module.

Optionally, the first battery module further includes a first battery module charging management module connected to the first charging power supply module, where the first battery module charging management module monitors a state of the first battery module and controls a charging process of the first battery module by the first charging power supply module; the second battery module further comprises a second battery module charging management module connected with the second charging power supply module, and the second battery module charging management module monitors the state of the second battery module and controls the charging process of the second battery module by the second charging power supply module.

Optionally, the first charging power supply module and the second charging power supply module comprise a USB TYPE C energy transmission protocol, receive power input of an external USB TYPE C interface, and convert the power input into energy suitable for charging the battery module.

Optionally, the first charging power supply module and the second charging power supply module include a wireless charging receiving module, and receive energy sent by an external wireless charging transmitting module, and convert the energy into energy suitable for charging the battery module.

Correspondingly, the utility model also provides an electric tool, which comprises a motor, a starting switch and a battery pack for supplying power to the motor, wherein the battery pack is as described in any one of the previous items, and when the starting switch is closed, the motor acquires the electric energy of the battery pack to start the electric tool.

The adapter, the battery pack and the electric tool provided by the utility model have the advantages that when any one of the battery modules is connected with the charging power supply through the control circuit in the adapter, the charging power supply can charge all the battery modules connected with the adapter. Meanwhile, the control circuit in the adapter can automatically enter a low-power-consumption state when the adapter does not need to work, and the electric energy of the battery module is prevented from being excessively consumed.

The present invention also provides a third adapter detachably connected to a power tool and detachably connected to the battery module, for supplying power of the battery module to the power tool, the adapter including: the adapter power terminal group and the adapter signal terminal group are detachably connected with the battery module; the tool power supply terminal group and the tool signal terminal group are detachably connected with the electric tool; the main control module consumes the electric energy of the battery module to start work; the power-on self-locking circuit is arranged between the main control module and the adapter power terminal group and can be selectively in an open state or a closed state, when the power-on self-locking circuit is in the open state, the main control module is in a power-off state and enters a sleep mode, and when the power-on self-locking circuit is in the closed state, the main control module is in a power-on state and starts to work.

Optionally, when the tool signal terminal group receives a trigger signal for turning on a start switch of the electric tool, the power-on self-locking circuit is switched from an off state to an on state.

Optionally, the battery module further includes a charging power supply module for receiving external charging energy to charge the battery module, when the charging power supply module receives the external charging energy, the battery module signal terminal group outputs a trigger signal to the adapter signal terminal group, and when the adapter signal terminal group receives the trigger signal, the power-on self-locking circuit is switched from an open state to a closed state.

Optionally, the adapter power terminal group includes a first adapter power terminal group and a second adapter power terminal group which are connected in parallel, the adapter signal terminal group includes a first adapter signal terminal group and a second adapter signal terminal group, and when the main control module determines that the trigger signal comes from the adapter signal terminal group and the second battery module is not connected to the adapter, the power-on self-locking circuit is controlled to be switched from a closed state to an open state.

Correspondingly, the utility model also provides a battery pack, which comprises a battery module and the adapter as described in any one of the above, wherein the battery module comprises a plurality of battery cores, a battery module power terminal group for outputting electric energy outwards, and a battery module signal terminal group for outputting electric signals outwards, the battery module power terminal group is matched and connected with the adapter power terminal group, and the battery module signal terminal group is matched and connected with the adapter signal terminal group.

Correspondingly, the utility model also provides an electric tool, which comprises a starting switch, a motor and a battery pack for supplying power to the motor, wherein when the starting switch is closed, the motor acquires the electric energy of the battery pack and starts to work.

The adapter, the battery pack and the electric tool have the advantages that the control circuit in the adapter automatically enters a low-power-consumption state when the control circuit does not need to work, and the electric energy of the battery module is prevented from being excessively consumed.

The present invention also provides a battery module detachably engaged with an adapter for supplying electric power to an electric tool via the adapter, the battery module including: the shell comprises six surfaces, and at least one surface is rectangular; the battery cores are accommodated in the shell and are connected in series and/or in parallel; the battery module positive terminal is connected with the positive electrode of the electric core group; the battery module negative terminal is connected with the negative electrode of the battery core group; and the control module is used for blocking the electric energy output of the electric core group when the positive terminal of the battery module and the negative terminal of the battery module are in short circuit.

Optionally, the control module includes a switch circuit connected in series between the positive terminal of the battery module and the positive electrode of the electric core group, or connected in series between the negative terminal of the battery module and the negative electrode of the electric core group.

Optionally, the switch circuit is a fuse.

Optionally, the switch circuit is a P-MOS switch transistor, the battery module interface further includes a battery module signal terminal, the battery module signal terminal is connected with the signal terminal of the adapter, the gate G of the P-MOS transistor is connected with the battery module signal terminal, the source S is connected with one of the positive electrode of the electric core set or the negative electrode of the electric core set, and the drain D is connected with one of the positive electrode terminal of the battery module or the negative electrode terminal of the electric core set.

The battery module provided by the utility model can exist and be transported independently, and no danger is generated.

The present invention also provides another battery module, including: the shell comprises six surfaces, and at least one surface is rectangular; the battery cores are accommodated in the shell and are connected in series and/or in parallel; the battery module interface is detachably matched with an adapter, and the battery module interface supplies electric energy to the electric tool or receives the electric energy of an electric tool charger to charge the battery pack through the adapter; the electronic equipment interface selectively provides electric energy for external electronic equipment or receives electric energy input of an external power supply to charge the cell pack, and the electronic equipment interface is a USB Type-c interface; and the control module is used for monitoring the state of the cell group and controlling the process that the cell group discharges to the electronic equipment through the electronic equipment interface or the process that the external power supply charges the cell group.

Optionally, the battery module includes a wireless charging receiving module, and the wireless charging receiving module receives energy sent by an external wireless charging transmitting module and charges the battery module.

Optionally, the control module controls the process of discharging the electric core pack to the electric tool through the battery module interface or the process of charging the electric core pack by the electric tool charger.

The battery module provided by the utility model can charge the battery module when a charging power supply is accessed, and can supply power to power consumption equipment when the power consumption equipment is accessed.

The present invention also provides an adapter, comprising: the adapter interface is detachably matched with the battery module and receives the electric energy of the battery module; the tool interface is detachably matched with the electric tool or the electric tool charger and used for supplying the received electric energy to the electric tool or receiving the electric energy of the electric tool charger to charge the battery module; the adapter includes at least one of the following three components: the wireless charging device comprises an electronic device interface, a wireless charging receiving module and a control circuit; the electronic device interface has at least one of the following three functions: supplying power to the electronic equipment connected with the power supply; receiving external power input and charging a battery module connected with the external power input; carrying out data exchange with an external electronic device; the wireless charging receiving module can receive energy sent by an external wireless charging transmitting module and charge the battery module; the control circuit has at least one of the following functions: monitoring the state information of the battery module and sending the monitoring result to the outside; monitoring state information of a battery module and controlling a process of charging the battery module through the electronic equipment interface; monitoring state information of the battery module and controlling the process of discharging the battery module through the electronic equipment interface; monitoring state information of a battery module and controlling a process of charging the battery module through the tool interface; and monitoring the state information of the battery module and controlling the discharging process of the battery module through the tool interface.

Optionally, the electronic device interface is a USB TYPE-C interface.

The present invention also provides a battery pack, including: an adapter including a tool interface and an adapter interface, the tool interface being removably matable with the power tool to provide power received from the adapter interface to the power tool; the battery module is detachably arranged on the adapter and comprises a battery module interface, and the battery module interface is detachably connected with the adapter interface and supplies electric energy to the adapter interface; and the USB type-c interface is used for receiving the input of an external power supply and charging the battery pack.

Optionally, the USB type-c interface is disposed on the adapter. Optionally, the USB type-c interface is disposed on the battery module.

Optionally, the USB type-c interface is selectively connected to an external electronic device to supply power to the electronic device.

Optionally, the battery pack further includes a wireless charging receiving module, where the wireless charging receiving module receives energy sent by an external wireless charging transmitting module and charges the battery module.

The present invention also provides a battery pack system, including: an adapter including a tool interface and an adapter interface, the tool interface being removably matable with the power tool to provide power received from the adapter interface to the power tool; the first battery module is detachably mounted on the adapter and comprises a first battery module interface, the first battery module interface is detachably connected with the adapter interface, and the first battery module supplies electric energy to the adapter interface through the first battery module interface; the second battery module is detachably mounted on the adapter and comprises a second battery module interface, the second battery module interface is detachably connected with the adapter interface, the second battery module provides electric energy for the adapter interface through the second battery module interface, and the number of battery cells contained in the second battery module is different from the number of battery cells contained in the first battery module; the adapter is selectively coupled to one of the first battery module and the second battery module.

Optionally, the voltage of the first battery module is the same as the voltage of the second battery module, and the capacity of the first battery module is different from the capacity of the second battery module.

The present invention also provides another battery pack system, including: an adapter comprising a first adapter and a second adapter; the first adapter includes a first tool interface and a first adapter interface, the first tool interface being removably matable with the power tool to provide power received from the first adapter interface to the power tool; the second adapter includes a second tool interface and a second adapter interface, the second tool interface removably matable with the power tool to provide power received from the second adapter interface to the power tool; the battery module comprises a first battery module and a second battery module; the first battery module is detachably mounted on the first adapter or the second adapter and comprises a first battery module interface, and the first battery module interface is detachably connected with the first adapter interface or the second adapter interface and supplies electric energy to the first adapter interface or the second adapter interface; the second battery module is detachably mounted on the first adapter or the second adapter and comprises a second battery module interface, and the second battery module interface is detachably connected with the first adapter interface or the second adapter interface and supplies electric energy to the first adapter interface or the second adapter interface; the first adapter can alternatively install the first battery module or the second battery module, and the second adapter can simultaneously install the first battery module and the second battery module.

Optionally, the adapter includes a USB interface, the USB interface with adapter interface electric connection, the warp the adapter interface charges or outwards transmits the electric energy of battery module to the battery module.

Optionally, the adapter includes a wireless charging receiving module electrically connected to the adapter interface, and the wireless charging receiving module receives an input of an external wireless charging power source, and charges the battery module through the adapter interface.

Optionally, the adapter includes a control circuit, and the control circuit monitors state information of the battery module through the adapter interface, and transmits the information to the tool interface, and transmits the information to an external device connected to the tool interface through the tool interface.

Optionally, the first battery module and the second battery module are connected in parallel or in series to the second adapter interface.

Optionally, the second adapter includes the circuit of preventing charging each other, first battery module and second battery module warp prevent charging each other circuit parallel connection in the second adapter interface, prevent charging each other the circuit and prevent that the battery module that voltage is high in first battery module and the second battery module from charging to the battery module that voltage is low.

Optionally, the battery module includes a USB interface, and the USB interface receives an external power input to charge the battery module, or transmits electric energy of the battery module to the outside via the USB interface.

Optionally, the second adapter further includes a parallel charging circuit, the parallel charging circuit is connected to the USB interfaces of the plurality of battery modules or the wireless charging receiving modules, and when any one of the USB interfaces or the wireless charging receiving modules receives an input of energy, the parallel charging circuit outputs the received electric energy to all the battery modules.

Optionally, the battery module includes a control circuit, and the control circuit monitors state information of the battery module, and transmits the state information of the battery pack to the outside or controls the charging and discharging processes of the battery module according to the state information.

The present invention also provides another battery pack, including: an adapter including a tool interface and an adapter interface, the tool interface being detachably mated with the power tool to supply power received from the adapter interface to the power tool, the tool interface being detachably connected to a power tool charger to charge the battery pack; the battery module is detachably arranged on the adapter and comprises a battery module interface and an electronic equipment interface, the battery module interface is detachably connected with the adapter interface, the battery module provides electric energy for the adapter interface through the battery module interface, and the electronic equipment interface can selectively supply power to external electronic equipment or be connected to external power supply equipment to charge the battery module; the first control module is arranged on the adapter and used for monitoring state parameters when the battery module discharges to the electric tool or the electric tool charger charges the electric tool; and the second control module is arranged on the battery module, monitors state parameters when the battery module discharges to the electronic equipment or the external power supply equipment charges the electronic equipment, and controls the discharging process of the battery module to the electronic equipment and the charging process of the external power supply equipment to the electronic equipment.

Optionally, the first control module controls at least one of a discharging process of the battery module to the electric tool or a charging process of the electric tool charger to the electric tool according to the monitored state parameter.

The utility model also provides an electric tool which is characterized by comprising a motor and a battery pack for supplying power to the motor, wherein the battery pack is as described in any one of the preceding items.

The present invention also provides another battery pack, including: an adapter including a tool interface and an adapter interface, the tool interface being removably matable with the power tool to provide power received from the adapter interface to the power tool; the battery module is detachably arranged on the adapter and comprises a battery module interface, the battery module interface is detachably connected with the adapter interface, and the battery module supplies electric energy to the adapter interface through the battery module interface; the installation space of the adapter is expandable, the first installation space is arranged in the first state, the second installation space is arranged in the second state, the first installation space is smaller than the second installation space, the battery module comprises a first battery module and a second battery module, the adapter can alternatively install one of the first battery module and the second battery module in the first state, and the adapter can simultaneously install the first battery module and the second battery module in the second state.

Optionally, the first battery module and the second battery module are connected in parallel to the adapter interface.

The present invention also provides another electric power tool including: a motor; the energy connecting part comprises an energy interface and is used for receiving external electric energy input to supply power for the motor; the battery module, including six faces, at least one face is the rectangle, detachably connect in the energy connecting portion, including the battery module interface, the battery module interface with energy interface detachably connects, the warp the energy interface provides the electric energy to the motor, battery module detachably connects with an adapter, the warp the adapter supplies power to second electric tool, second electric tool detachably is connected with the battery package, by the battery package power supply.

Optionally, the battery module includes a housing, the housing includes an upper housing and a lower housing, and two parallel guide rails are disposed on a top surface of the upper housing.

Optionally, the energy connecting portion and the adapter are provided with sliding grooves matched with the guide rails.

The present invention also provides another battery pack, including: an adapter including a tool interface and an adapter interface, the tool interface being removably matable with the power tool to provide power received from the adapter interface to the power tool; the battery module is detachably arranged on the adapter and comprises a battery module interface, and the battery module interface is detachably connected with the adapter interface and supplies electric energy to the adapter interface; and the electronic equipment interface is used for receiving the input of an external power supply and charging the battery pack.

Preferably, the electronic device interface is a USB type-c interface.

Preferably, the electronic device interface is provided on the adapter.

Preferably, the electronic device interface is disposed on the battery module.

The present invention also provides another battery pack, including: an adapter including a tool interface and an adapter interface, the tool interface being removably matable with the power tool to provide power received from the adapter interface to the power tool; the first battery module is detachably mounted on the adapter and comprises a first battery module interface, the first battery module interface is detachably connected with the adapter interface, and the first battery module supplies electric energy to the adapter interface through the first battery module interface; the second battery module is detachably installed on the adapter and comprises a second battery module interface, the second battery module interface is detachably connected with the adapter interface, the second battery module is powered by the second battery module interface, and the first battery module interface and the second battery module interface are connected in parallel to the adapter interface.

Preferably, the battery pack further comprises a third battery module, the third battery module is detachably mounted on the adapter and comprises a third battery module interface, the third battery module interface is detachably connected with the adapter interface, the third battery module is connected with the adapter interface through the third battery module interface, and the third battery module interface is connected with the second battery module interface in parallel to the adapter interface.

Preferably, the first battery module and the second battery module are stacked.

The present invention also provides a battery pack system, including: an adapter comprising a first adapter and a second adapter; the first adapter includes a first tool interface and a first adapter interface, the first tool interface being removably matable with the power tool to provide power received from the first adapter interface to the power tool; the second adapter includes a second tool interface and a second adapter interface, the second tool interface removably matable with the power tool to provide power received from the second adapter interface to the power tool; the battery module comprises a first battery module and a second battery module; the first battery module is detachably mounted on the first adapter or the second adapter and comprises a first battery module interface, and the first battery module interface is detachably connected with the first adapter interface or the second adapter interface and supplies electric energy to the first adapter interface or the second adapter interface; the second battery module is detachably mounted on the first adapter or the second adapter and comprises a second battery module interface, and the second battery module interface is detachably connected with the first adapter interface or the second adapter interface and supplies electric energy to the first adapter interface or the second adapter interface; the first adapter can alternatively install the first battery module or the second battery module, and the second adapter can simultaneously install the first battery module and the second battery module.

Preferably, the adapter includes a USB interface, the USB interface is electrically connected to the adapter interface, and the adapter interface charges the battery module or transmits the electric energy of the battery module to the outside.

Preferably, the adapter includes a wireless charging receiving module electrically connected to the adapter interface, and the wireless charging receiving module receives an input of an external wireless charging power source and charges the battery module through the adapter interface.

Preferably, the adapter comprises a control circuit, and the control circuit monitors the state information of the battery module through the adapter interface, transmits the information to the tool interface, and transmits the information to the external equipment connected with the tool interface through the tool interface.

Preferably, the first battery module and the second battery module are connected in parallel or in series to the second adapter interface.

Preferably, the second adapter includes a mutual charge preventing circuit, the first battery module and the second battery module are connected in parallel to the second adapter interface through the mutual charge preventing circuit, and the mutual charge preventing circuit prevents the battery module with high voltage from charging to the battery module with low voltage in the first battery module and the second battery module.

Preferably, the battery module comprises a USB interface, and the USB interface receives an external power input to charge the battery module, or transmits electric energy of the battery module to the outside through the USB interface.

Preferably, the battery module comprises a wireless charging receiving module, and the wireless charging receiving module receives energy sent by an external wireless charging transmitting module and charges the battery module.

Preferably, the second adapter further comprises a parallel charging circuit, the parallel charging circuit is connected with the USB interfaces or the wireless charging receiving modules of the plurality of battery modules, and when any one of the USB interfaces or the wireless charging receiving modules receives an energy input, the parallel charging circuit outputs the received electric energy to all the battery modules.

Preferably, the battery module comprises a control circuit, and the control circuit monitors the state information of the battery module and transmits the state information of the battery pack to the outside or controls the charging and discharging processes of the battery module according to the state information.

Preferably, the first battery module and the second battery module are connected in parallel to the adapter interface.

The utility model also provides an electric tool comprising a motor and a battery pack for supplying power to the motor, wherein the battery pack is as described in any one of the preceding items.

The present invention also provides a battery module, including: a housing having a shape similar to a rectangular parallelepiped; the battery cores are accommodated in the shell and are connected in series and/or in parallel; the control module monitors the state of the electric core group and controls the charging and discharging processes of the electric core group; the battery module interface is detachably matched with an adapter and supplies electric energy to the electric tool through the adapter; the electronic equipment interface charges to the electric core group to the electronic equipment provides the electric energy and receives external power supply's electric energy, the electronic equipment interface is USBType-c interface.

The present invention also provides another battery module, including: a housing having a shape similar to a rectangular parallelepiped; the battery cores are accommodated in the shell and are connected in series and/or in parallel; the battery module interface comprises a battery module positive terminal connected with the positive electrode of the battery core pack and a battery module negative terminal connected with the negative electrode of the battery core pack, is detachably matched with an adapter, and supplies electric energy to the electric tool through the adapter; and the control module is used for blocking the electric energy output of the electric core group when the positive terminal of the battery module and the negative terminal of the battery module are in short circuit.

Preferably, the control module comprises a switch circuit connected in series between the positive terminal of the battery module and the positive electrode of the electric core group or between the negative terminal of the battery module and the negative electrode of the electric core group.

Preferably, the switching circuit is a fuse.

Preferably, the switching circuit is a P-MOS switching transistor, the battery module interface further includes a battery module signal terminal, the battery module signal terminal is connected with the signal terminal of the adapter, the gate G of the P-MOS transistor is connected with the battery module signal terminal, the source S is connected with one of the positive electrode of the electric core set or the negative electrode of the electric core set, and the drain D is connected with one of the positive electrode terminal of the battery module or the negative electrode terminal of the electric core set.

The present invention also provides another electric power tool including: a motor; the energy connecting part comprises an energy interface and is used for receiving external electric energy input to supply power for the motor; the battery module, detachably connect in energy connecting portion, including battery module interface, battery module interface with energy interface detachably connects, the warp energy interface provides the electric energy to the motor, battery module detachably connects with an adapter, the warp the adapter supplies power to second electric tool, second electric tool detachably is connected with the battery package, by the battery package power supply.

The present invention also provides an adapter, comprising: a tool interface detachably engaged with the power tool for supplying the received power to the power tool; the adapter interface is detachably matched with the battery module and receives the electric energy of the battery module; the adapter includes at least one of the following three components: the wireless charging device comprises an electronic device interface, a wireless charging receiving module and a control circuit; the electronic device interface has at least one of the following three functions: the received electric energy can be provided for the external equipment connected with the power supply device; the device can also receive the input of an external power supply and charge the battery module connected with the device; data exchange can be carried out with external electronic equipment; the wireless charging receiving module can receive energy sent by an external wireless charging transmitting module and charge the battery module; the control circuit has at least one of the following functions: monitoring the state information of the battery module and sending the monitoring result to the outside; monitoring the state information of the battery module and controlling the charging process of the battery module according to the state information; and monitoring the state information of the battery module and controlling the discharging process of the battery module according to the state information.

Preferably, the electronic device interface is a USB TYPE-C interface.

Compared with the prior art, the battery pack, the battery module and the adapter provided by the utility model have the advantages that: the battery package can be through the battery module of series connection or parallelly connected different quantity on the adapter, realizes the battery package in voltage or the different changes in capacity, satisfies different electric tool to the demand of battery package, and the battery module in the battery package can be dismantled alone simultaneously, supplies with consumer electronics or household electrical appliances use. In addition, because the battery module is similar to a universal charger in the market in performance and appearance, and the battery pack formed by the adapter and the battery module is similar to a universal electric tool battery pack in the market in performance and appearance, when the battery pack supplies power to different electric tools or consumer electronic products or household appliances, the requirements of the products of various types on the performance and the appearance of a power supply can be met, and the appearance of the products of various types cannot be changed or the use habit of a user cannot be influenced. Therefore, the compatibility of the battery pack is greatly improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a first preferred embodiment of a power tool.

Fig. 2 is a schematic structural diagram of a second preferred embodiment of the power tool.

Fig. 3 is an exploded view of the battery pack according to the first preferred embodiment.

Fig. 4 is an exploded view of a battery pack according to a second preferred embodiment.

Fig. 5 is an exploded view of the battery module according to the first preferred embodiment.

Fig. 6 is a circuit block diagram of a battery pack including a battery module according to a fourth preferred embodiment.

Fig. 7 is a circuit block diagram of a battery pack including two battery modules according to a fourth preferred embodiment.

Fig. 8 is a circuit block diagram of a battery pack according to a sixth preferred embodiment.

FIG. 9a is a block diagram of the DC power circuit according to the first preferred embodiment.

FIG. 9b is a block diagram of a DC power circuit according to the second preferred embodiment.

FIG. 9c is a block diagram of a DC power circuit according to the third preferred embodiment.

FIG. 9d is a block diagram of a DC power circuit according to the fourth preferred embodiment.

Fig. 10 is a dc power supply charging graph.

Fig. 11 is a schematic view of a battery pack according to an eighth preferred embodiment.

FIG. 12 is a circuit schematic of a preferred embodiment of the adapter.

Fig. 13a is a flow chart of the first preferred embodiment of the battery pack shown in fig. 11.

Fig. 13b is a flow chart of the second preferred embodiment of the battery pack shown in fig. 11.

Fig. 14 is a schematic view of a battery pack according to a ninth preferred embodiment.

Fig. 15 is a circuit block diagram of a preferred embodiment of the battery module shown in fig. 14.

Fig. 16 is a flow chart of the first preferred embodiment of the battery pack shown in fig. 14.

FIG. 17 is a schematic diagram of a power tool system according to a preferred embodiment.

Fig. 18 is an exploded view of the battery module shown in fig. 17.

Fig. 19 is a schematic structural view of a third preferred embodiment of the power tool.

Fig. 20 is a schematic view showing the battery module shown in fig. 19 fitted with a charger.

Fig. 21 is a flow chart illustrating a charging step of the dc power supply shown in fig. 9 c.

Fig. 22 is a schematic flow chart of the charging step of the dc power supply shown in fig. 9 d.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first switch may be referred to as a second switch, and similarly, a second switch may be referred to as a first switch, without departing from the scope of the present application. The first switch and the second switch are both switches, but they are not the same switch.

It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.

As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Fig. 1 shows an electric tool 100 according to a first preferred embodiment of the present invention. The power tool 100 includes a housing, a motor located within the housing, and a battery pack interface 102 that removably couples with a battery pack 200. The battery pack interface 102 draws power from the battery pack 200 to power the motor. The battery pack 200 includes an adapter 204, and a battery module 202 housed in the adapter 204. The battery module 202 is detachably mounted in the adapter 204, i.e., an operator can load the battery module 202 into the adapter 204 or remove the battery module 202 from the adapter 204. The adapter 204 includes a tool interface 206 and an adapter interface (not shown). The tool interface 206 removably mates with the battery pack interface 102 of the power tool 100. The adapter interface is detachably engaged with the battery module 202 to receive power of the battery module 202. The tool interface 206 includes a tool terminal set 215. The adapter interface includes an adapter terminal set 217. The battery module 202 includes a battery module interface that includes a battery module terminal set 216. The adapter terminal set 217 is electrically connected to the battery module terminal set 216 in a detachable manner, and transmits the electric power of the battery module 202 to the tool terminal set 215. The tool terminal set 215 supplies the electric power of the battery module 202 to the electric power tool 100. The adapter 204 can mount at least 1 battery module 202. The user can selectively load one

battery module

202 or 2 battery modules 202 or other numbers of battery modules 202 according to specific usage scenarios. The battery pack 200 can be discharged to the outside regardless of the number of battery modules 202 mounted therein, with the difference in voltage or capacity when discharged to the outside.

Referring now to fig. 2, a second preferred embodiment of the power tool 100 is provided in which the adapter 204 is not removable from the power tool 100. In this embodiment, the power tool 100 includes a motor, an energy connecting portion 104, and a battery module 202. The power connection 104 includes a power interface that receives external power input to power the motor. The battery module 202 is removably coupled to the energy source connection 104, including the battery module interface. The battery module interface is detachably connected with the energy interface and provides electric energy for the motor through the energy interface. The energy source connection 104 of this embodiment is similar in structure to the adapter 204 of the first preferred embodiment, but is not detachable from the power tool 100. The energy source interface corresponds to the adapter interface in the first preferred embodiment. The structure of the battery module 202 is the same as that of the battery module 202 in the first preferred embodiment.

A first preferred embodiment of the battery pack 200 shown in fig. 1 will be described with reference to fig. 3. The battery pack 200 includes an adapter 204, and a battery module 202 housed in the adapter 204. The adapter 204 includes an upper cover 208, a bottom cover 210, openable side covers 212, and a circuit board assembly 214. The upper cover 208 and the bottom cover 210 form a receiving cavity. The openable side cover 212 may close or open the receiving cavity. When the side cover 212 is opened, an operator may load the battery module 202 into the receiving cavity or remove the battery module 202 from the receiving cavity. The adapter 204 includes a tool interface 206 and an adapter interface. The tool interface 206 removably mates with the battery pack interface 102 of the power tool 100. The adapter interface is detachably engaged with the battery module 202 to receive power of the battery module 202. The tool interface 206 includes a tool terminal set 215. The adapter interface includes an adapter terminal set 217. The tool terminal set 215 and the adapter terminal set 217 are mounted on the circuit board assembly 214. The battery module 202 includes a battery module interface that includes a battery module terminal set 216. The adapter terminal set 217 is electrically connected to the battery module terminal set 216 in a detachable manner, and transmits the electric power of the battery module 202 to the tool terminal set 215. The tool terminal set 215 supplies the electric power of the battery module 202 to the electric power tool 100. In this embodiment, the receiving space of the adapter 204 can receive only one battery module 202. In other alternative embodiments, the bottom cover 210 of the adapter 204 is a retractable bottom cover 210, and the adapter 204 can receive only one battery module 202 when the bottom cover 210 is in the retracted first state and the adapter 204 can receive two battery modules 202 when the adapter 204 is in the extended second state. In other embodiments, the adapter 204 may be in a third state of extension, in which case the adapter 204 may accommodate three or more battery modules 202.

A second preferred embodiment of the battery pack 200 shown in fig. 1 will be described with reference to fig. 4. In this embodiment, the structure of the battery pack 200 is substantially the same as that of the first preferred embodiment, except that in this embodiment, the adapter 204 can accommodate two battery modules 202. The battery module 202 includes a first battery module 202 and a second battery module 202. The first battery module 202 and the second battery module 202 are connected in parallel or in series with each other. The circuit board assembly 214 includes a connection circuit that connects the first battery module 202 and the second battery module 202. The connection circuit in this embodiment realizes the parallel connection of the first battery module 202 and the second battery module 202. Optionally, the battery pack 200 also includes a spacer disposed within the adapter 204. The partition is vertically disposed relative to the side cover 212, and divides the accommodating cavity into a first accommodating cavity located above and a second accommodating cavity located below. The space of the first containing cavity is basically equivalent to that of the second containing cavity. The first receiving cavity receives the first battery module 202, and the second receiving cavity receives the second battery module 202. Further, the partition and the bottom cover 210 are provided with guide rails. The bracket 226 of the battery module 202 is provided with a slide groove. The guide rail and the sliding groove both extend along the axial direction of the battery core, and the positions correspond, so that the battery module 202 can be accurately installed in the adapter 204 along the guide rail. The battery module 202 may be housed in both the first housing chamber and the second housing chamber, or only one of the first housing chamber and the second housing chamber may be housed in the battery module 202. The battery pack 200 can be discharged to the outside regardless of the number of battery modules 202 mounted therein. The difference is in voltage or capacity upon external discharge.

In the above embodiment, the battery module 202 is completely received in the adapter 204. In other embodiments, the battery module 202 may be partially received in the adapter 204. For example, when the adapter 204 does not include the bottom cover 210, the first battery module 202 is directly mounted to the adapter 204, and the second battery module 202 is mounted to the rear surface of the first battery module 202 to form a stacked structure.

In the embodiment shown in fig. 4, the first battery module 202 is connected in parallel with the second battery module 202. Specifically, the adapter terminal group 217 includes an adapter positive terminal and an adapter negative terminal. The connection circuit includes a first positive connection terminal and a first negative connection terminal, and a second positive connection terminal and a second negative connection terminal. The first positive connecting terminal is connected with the second positive connecting terminal in parallel, and the first negative connecting terminal is connected with the second negative connecting terminal in parallel. The terminal set of the first battery module 202 includes a first battery module positive terminal and a first battery module negative terminal. The terminal set of the second battery module 202 includes a second battery module positive terminal and a second battery module negative terminal. After the first battery module 202 and the second battery module 202 are installed in the adapter 204, the first positive connecting terminal and the first negative connecting terminal are electrically connected with the first battery module positive terminal and the first battery module negative terminal correspondingly, and the second positive connecting terminal and the second negative connecting terminal are electrically connected with the second battery module positive terminal and the second battery module negative terminal correspondingly, so that the first battery module 202 and the second battery module 202 are connected in parallel. Alternatively, when the connection circuit connects the first negative connection terminal and the second positive connection terminal in series, the series connection of the first battery module 202 and the second battery module 202 is realized. Alternatively, the connection circuit may switch the first battery module 202 and the second battery module 202 in series or in parallel. Alternatively, the connection circuit may only enable one of the first battery module 202 and the second battery module 202 to be in parallel or in series.

Alternatively, the connection circuit is elastically connected to the battery module 202, and the elastic connection is released when the side cover 212 is opened. The two battery modules 202 are disconnected from the connection circuit. When the side cover 212 is closed, the elastic connection is compressed, and the connection of the two battery modules 202 to the connection circuit is closed. Alternatively, the elastic connection is implemented by a spring disposed between the connection circuit and the battery module 202.

In the third preferred embodiment of the battery pack 200 shown in fig. 1, the adapter 204 includes a first adapter 204 and a second adapter 204, the first adapter 204 can only mount one battery module 202, and the second adapter 204 can only mount two battery modules 202. When the battery module 202 is mounted to the first adapter 204, a battery pack 200 similar to the first preferred embodiment is formed. When the battery module 202 is mounted to the second adapter 204, a battery pack 200 similar to the second preferred embodiment is formed. Other structures, refer to the foregoing embodiments.

Fig. 5 shows a first preferred embodiment of the battery module 202 shown in fig. 1 to 4. When it is considered that the battery module 202 includes one or more battery modules 202, the structure of each battery module 202 is the same. Therefore, the components of the battery module 202 will be described by taking the minimum unit battery module 202 as an example. The battery module 202 includes a housing, and a battery cell pack 220 received in the housing. The housing is generally rectangular in shape and includes an upper shell 222 and a lower shell 224, which upper and

lower shells

222 and 224 are closed to form six substantially smooth surfaces. The appearance is similar to that of a mobile power supply for electronic equipment on the market. It is possible for the battery module 202 to be used as a mobile power source for electronic equipment or other household electric appliances. The battery pack 220 includes at least three battery cells connected in series. The first electricity-saving core is provided with a central axis X1, the second electricity-saving core is provided with a central axis X2, and the third electricity-saving core is provided with a central axis X3. Optionally, the first cell section, the second cell section, and the third cell section are arranged in parallel, so that the central axes X1, X2, and X3 are all located in the same plane. The battery module 202 further includes a bracket 226 for supporting the cells and a connecting piece 228 for connecting each cell. Optionally, the first battery module 202 includes 5 lithium batteries connected in series, and a nominal voltage of the lithium batteries is 3.6V. In other embodiments, the battery module 202 includes other number of lithium batteries, and the lithium batteries may be connected in at least one of series connection and parallel connection. In other embodiments, the battery modules 202 include other numbers of battery modules 202, and the space of the receiving cavity is correspondingly increased to accommodate the corresponding number of battery modules 202, such as 3, 4, 5, etc. The battery module 202 further includes a battery module interface, the battery module interface includes a battery module terminal set 216, the battery module terminal set 216 includes a battery module positive terminal and a battery module negative terminal respectively connected to the positive electrode and the negative electrode of the battery pack 220, and when the battery module 202 is installed in the adapter 204, the battery module is electrically connected to the adapter terminal set 217 correspondingly, so that the electric energy of the battery module 202 is transmitted to the tool terminal set 215 of the adapter 204, so that the battery pack 200 can be externally powered.

A fourth preferred embodiment of the battery pack 200 according to the present invention will be described with reference to fig. 3 to 6. The battery pack 200 includes an adapter 204, and a battery module 202 housed in the adapter 204. The adapter 204 and the battery module 202 are constructed as described above with reference to the aforementioned embodiments. The present embodiment features the circuit board assembly 214 of the adapter 204 including control circuitry that at least one of detects or controls the status of the battery module 202. As shown in fig. 6, a circuit diagram of the connection between the battery module 202 and the adapter 204 is shown. As shown in fig. 6, a circuit diagram is shown in which two battery modules 202 are connected to an adapter 204. In the figure, each battery module 202 includes a battery module terminal set 216 and a temperature sensor 232. The battery module terminal set 216 includes a first signal terminal of the battery module 202 connected to the temperature sensor 232, a positive terminal of the battery module and a negative terminal of the battery module respectively connected to the positive and negative electrodes of the battery core set. The control circuit in the adapter 204 includes an adapter terminal group 217 connected to the battery module terminal group 216, and specifically, the adapter terminal group 217 includes an adapter positive terminal, an adapter negative terminal, and an adapter signal terminal. The adapter terminal set 217 is electrically connected to the tool terminal set 215 of the adapter 204, and specifically, the tool terminal set 215 includes a tool positive terminal, a tool negative terminal, and a tool signal terminal. The control circuit collects signals from the temperature sensor 232 and transmits them to the outside via the tool signal terminals for use by the peripheral devices connected to the adapter 204. The control circuit transmits the power of the battery module 202 to the outside through the tool positive terminal and the tool negative terminal for use by the peripheral devices connected to the adapter 204.

In this embodiment, the battery module 202 further includes a discharge lock circuit, and the adapter 204 further includes a discharge unlock circuit. When the battery module is placed alone, the discharge locking circuit is disconnected, so that the battery module 202 is prevented from directly discharging outwards, and the requirement of the national safety standard on the use safety of the power supply module is not met. When the battery module 202 is mounted in the adapter 204, it cooperates with the discharge unlock circuit in the adapter 204, so that the discharge lock circuit is closed and the battery module 202 can discharge to the outside. Specifically, as shown in fig. 6 and 7, a discharge locking circuit is provided between the positive terminal of the battery module and the positive electrode of the electric core pack 220. Optionally, the discharge locking circuit includes a P-MOS switch transistor, and a second signal terminal of the battery module connected to the P-MOS switch transistor. The grid G of the P-MOS is connected with the second signal terminal of the battery module, the source S is connected with the anode of the battery pack 220, and the drain D is connected with the anode terminal of the battery module. When the battery module 202 is placed alone, the P-MOS is turned off, so that the positive terminal of the battery module is disconnected from the positive electrode of the battery pack 220, and the voltage between the positive terminal and the negative terminal of the battery module is zero. The adapter 204 also includes an adapter second signal terminal that is connected to the adapter negative terminal. When the battery module 202 is installed in the adapter 204, the four terminals of the adapter 204 are electrically connected with the four terminals of the battery module 202, wherein the connection of the second signal terminal of the adapter 204 with the second signal terminal of the battery module closes the P-MOS, so that the voltage of the battery module 202 is applied to the positive terminal of the adapter and the negative terminal of the adapter, and further applied to the positive terminal of the tool and the positive terminal of the tool, thereby discharging the battery pack 200 to the outside.

In this embodiment, preferably, the positive terminal of the battery module and the negative terminal of the battery module have a first length, the first signal terminal of the battery module and the second signal terminal of the battery module have a second length, and the first length is greater than the second length. The design is such that the battery module positive terminal and the battery module negative terminal contact the adapter positive terminal and the adapter negative terminal at a first point in time, the battery module first signal terminal and the battery module second signal terminal contact the adapter first signal terminal and the adapter second signal terminal at a second point in time, the first point in time being earlier than the second point in time. The advantage lies in, battery module positive terminal and battery module negative terminal and adapter positive terminal and adapter negative terminal contact back, and the locking circuit that discharges just closes, and battery module 202's voltage is just applyed to adapter positive terminal and adapter negative terminal, has avoided battery module positive terminal and battery module negative terminal and adapter positive terminal and adapter negative terminal contact to strike sparks.

In order to ensure the safety of the battery module and meet the safety requirements, the utility model provides that the battery module further comprises a control circuit. When the positive terminal of the battery module and the negative terminal of the battery module are in short circuit, the control circuit blocks the electric energy output of the electric core group. Optionally, the control circuit comprises a switch circuit connected in series between the positive terminal of the battery module and the positive electrode of the electric core group, or the control circuit comprises a switch circuit connected in series between the negative terminal of the battery module and the negative electrode of the electric core group. In one embodiment, the switching circuit is the discharge lock circuit described in the previous embodiments. Before the adapter is not connected, the discharge locking circuit is in a disconnected state, and no danger occurs when the positive terminal of the battery module and the negative terminal of the battery module are in short circuit. In another alternative embodiment, the switch circuit is a fuse, and when the positive terminal of the battery module is short-circuited with the negative terminal of the battery module, the fuse is fused, so that the battery module is not in danger.

Fig. 7 is a circuit diagram illustrating the connection between two battery modules 202 and the adapter 204. According to the operation principle of the discharge locking circuit described above, after the two battery modules 202 are coupled to the adapter 204, the voltage of the battery modules 202 is applied to the tool terminal set 215 of the adapter 204, so that the battery pack 200 can be discharged to the outside. In this embodiment, the two battery modules 202 are connected in parallel to supply power to the outside. In other alternative embodiments, two battery modules 202 may also be connected in series to supply power to the outside.

The adapter 204 in this embodiment also includes an electronic device interface 218. The electronics interface 218, unlike the tool interface 206, removably connects with external electronics of the non-power tool 100. In an alternative embodiment, the circuitry within the battery pack 200 is shown in fig. 6, and the electronics interface 218 is coupled to the control circuitry. When the electronic device is a charging device, the electric energy of the charging device is transmitted to the control circuit through the electronic device interface 218, and the control circuit is further transmitted to the battery module 202, so that the electronic device interface 218 charges the battery pack 200. When the electronic device is a power-consuming product, such as a mobile phone, a Pad, a computer, etc., the electric energy of the battery module 202 is transmitted to the electronic device interface 218 through the control circuit, so as to supply power to the external electronic device. When the electronic device includes the data transmission module, the status signal of the battery module 202 is transmitted to the electronic device interface 218 via the control circuit, so as to transmit data to the electronic device in a unidirectional manner or perform data exchange with the electronic device in a bidirectional manner.

Optionally, the electronic device interface 218 is a USB interface. Optionally, the electronic device interface 218 is a USB Type-C interface. The default 5V power supply of the USB Type-C interface is backward compatible with the previous USB interface. Furthermore, the brand-new USB Type-C interface contains 4 pins dedicated to power supply and ground, respectively. The USB Type-C interface can support up to 20V and 5A current. In an alternative embodiment, the nominal voltage of the battery pack 200 is 18V and the full charge voltage is 21V. At this time, the USB Type-C interface can only output 20V at most, so that the 18V battery pack 200 can be fully charged by about 80%. To enable the battery pack 200 to be fully charged, a boost circuit may be provided in the adapter 204 to boost the 20V output by the USB Type-C to 21V. The specific implementation circuit will be described in detail in the following embodiments.

When the battery pack 200 includes two battery modules 202, the internal circuit diagram is shown in fig. 7. At this time, the charging power source accessed through the USB Type-C interface is simultaneously input to the two battery modules 202, and the two battery modules 202 are charged in parallel.

In this embodiment, the adapter 204 further includes a wireless charging receiving module. The wireless charging receiving module is disposed between the bottom cover 210 and the battery module 202. In an alternative embodiment, the circuit diagram inside the battery pack 200 is as shown in fig. 6 and 7, and the wireless charging receiving module is connected to the control circuit inside the adapter 204, and outputs the received charging energy to the battery module 202 through the control circuit to charge the battery module 202. When the two battery modules 202 are connected in parallel, the wireless charging receiving module receives the charging energy converted from the energy transmitted by the external wireless charging transmitting module and applies the charging energy to the two battery modules 202 at the same time, so as to charge the two battery modules 202 in parallel.

As shown in fig. 7, when the battery pack 200 includes two parallel battery modules 202, in order to prevent a voltage difference between the two battery modules 202 from causing one battery module 202 to charge the other battery module 202, and damage or even danger to the battery module 202 occurs, in this embodiment, the adapter 204 further includes an anti-mutual charging circuit.

In this embodiment, the battery pack 200 can select a conventional charger to charge the battery module 202 through the tool interface 206, can select a USB charger to charge the battery module 202 through the USB type-c interface, and can select a wireless charger to charge the battery module 202 through the wireless charging receiving module. The control circuit further comprises a charging detection module, and when the charging detection module detects that the existing charging power supply is accessed, other charging power supplies are forbidden to be accessed. This has the effect that when all three charging modes are switched in, the control circuit detects that only the charging power supply switched in earliest is allowed to be charged, and the charging power supply switched in later is forbidden to be charged.

The present invention also provides a fifth embodiment of a battery pack 200. The battery pack 200 in this embodiment includes only a part of the components in the fourth embodiment. Optionally, in this embodiment, the battery module 202 does not include a discharge lock circuit. Optionally, in this embodiment, the adapter 204 does not include at least one of the wireless charging receiving module, the USB interface, and the control circuit.

A sixth preferred embodiment of a battery pack 200 according to the present invention will be described with reference to fig. 8. In this embodiment, the battery pack 200 includes an adapter 204, and a battery module 202 housed in the adapter 204. The difference between the present embodiment and the previous embodiment is that the battery module 202 further includes a control circuit. Since the control circuit is provided in the battery module 202, the adapter 204 will not need to be provided with the control circuit. The control circuit monitors parameters such as the current voltage of each cell in the battery module 202, the temperature of the battery module 202, and the charging current, and controls the charging and discharging processes of the battery module 202 according to the detection result. Because the control circuit is arranged in the battery module 202, the battery module 202 can automatically manage charging and discharging, the state signal of the battery module 202 does not need to be transmitted outwards, and the battery module terminal group 216 does not need to be provided with a signal terminal. The battery module terminal set 216 in this embodiment includes a battery module positive terminal and a battery module negative terminal. The adapter terminal group 217 includes an adapter positive terminal and an adapter negative terminal. When the battery module 202 is installed in the adapter 204, the battery module terminal set 216 is electrically connected to the adapter terminal set 217, so that the power of the battery module 202 is supplied to the tool terminal set 215 to supply power to the outside.

In this embodiment, the battery module 202 further includes an electronic device interface 218. For a specific form of the electronic device, reference is made to the foregoing embodiments, which are not described herein again. The electronic device interface 218 is configured to enable external electronic devices to be charged via the electronic device interface 218, the battery module 202 to be charged via the electronic device interface 218, and data to be transferred between the external devices via the electronic device interface 218, regardless of whether the battery module 202 is installed in the adapter 204. In the battery module 202 of the present embodiment, the battery module 202 does not need to be mounted in the adapter 204 as in the fifth embodiment to realize the above functions, and the usage scenario of the battery module 202 is expanded. The advantages brought by this are that when the battery module 202 is not installed in the adapter 204, it can be used as a completely independent power supply to realize external discharge and internal charging, and meanwhile, because the battery module 202 has a flat and smooth shape, it is especially convenient to carry and supplies power for various electronic devices; when the battery module 202 is installed in the adapter 204, a complete battery pack for the electric tool is formed, and power can be supplied to the electric tool, so that the battery pack 200 can supply power to the electric tool 100 and electronic equipment, meet the appearance requirement of the traditional battery pack for the electric tool 100 and meet the appearance requirement of the traditional mobile power supply for the electronic equipment, and the universality of the battery pack 200 is improved.

In this embodiment, when two battery modules 202 are simultaneously loaded into the adapter 204 to form the battery pack 200, although the battery pack 200 has two electronic device interfaces 218, as long as any one of the electronic device interfaces 218 is connected to the charging power source, the two battery modules 202 should be charged simultaneously. Based on this, as shown in fig. 8, the adapter 204 further includes a parallel charging circuit, one end of the parallel charging circuit is connected to the electronic device interface 218 of the first battery module 202, and the other end of the parallel charging circuit is connected to the electronic device interface 218 of the second battery module 202. When the electronics interface 218 of any one battery module 202 is connected to a charging power source, the parallel charging circuit synchronously directs the charging power source to another battery module 202, so that the charging power source from one battery module 202 can charge both battery modules 202 simultaneously.

In this embodiment, the battery module 202 further includes a wireless charging receiving module. Due to the wireless charging receiving module, the battery module 202 can be charged through the wireless charging receiving module and also through the electronic device interface 218. When the battery module 202 is installed in the adapter 204, the battery pack 200 can be connected to a conventional charger of the power tool 100 through the tool interface 206 to charge the battery module 202, in addition to the above two charging methods. As shown in fig. 8, when a plurality of battery modules 202 are loaded into the adapter 204, the wireless charging receiving module of any battery module 202 receives the energy transmitted by the wireless charging transmitting module or the electronic device interface 218 receives the charging power, and the charging power can be introduced into other battery modules 202 through the parallel charging circuit to charge all the battery modules 202 in the adapter 204 together.

The present invention also provides a seventh preferred embodiment of the battery pack 200. The battery pack 200 in this embodiment includes only a part of the components in the sixth embodiment. Optionally, in this embodiment, the battery module 202 does not include at least one of a wireless charging receiving module, a USB interface, and a control circuit.

The present invention also provides an embodiment as shown in fig. 17 and 18. The present embodiment is characterized in that the adapter is used to connect a battery module including two groups of battery packs, instead of connecting 2 battery modules to the adapter, so as to increase the capacity or voltage of the battery pack. Specifically, as shown in fig. 17, the battery pack system includes the adapter 104, a first battery module 202', and a second battery module 202. The first battery module 202' is removably mounted to the adapter 104 and includes a first battery module interface. The first battery module interface is detachably connected with the adapter interface. The first battery module 202' provides power to the adapter interface via the first battery module interface. The second battery module 202 is removably mounted to the adapter 104 and includes a second battery module interface. The second battery module interface is detachably connected with the adapter interface. The second battery module 202 provides power to the adapter interface via the second battery module interface. The number of cells that the second battery module contained is different from the number of cells that the first battery module contained. The adapter includes a tool interface that removably mates with the power tool 100 and an adapter interface that provides power received from the adapter interface to the power tool 100. The adapter is selectively coupled with one of the first and second battery modules 202' and 202. An explosion diagram of the first battery module 202' is shown in fig. 18(a), and an explosion diagram of the second battery module 202 is shown in fig. 18 (b). Illustratively, the first battery module 202' includes a battery pack composed of 5 battery cells. The second battery module 202 includes a battery pack including 10 battery cells. If 10 batteries are connected in series every 5 batteries to form one group, and then two groups are connected in parallel, the capacity of the second battery module is 2 times of the capacity of the first battery module. If 10 battery cells are connected in series with each other, the voltage of the second battery module is 2 times that of the first battery module. In other embodiments, the first battery module and the second battery module may include other numbers of cells, so as to form capacities or voltages in other proportional relationships. The capacity or voltage of the battery pack is increased by replacing the first battery module with the second battery module, namely, the capacity or voltage is increased by changing the number of battery cells contained in the battery module matched and connected with the adapter. Instead of increasing the capacity or voltage by increasing the number of battery modules in the aforementioned embodiment. In the embodiment of increasing capacity or voltage through the mode that increases battery module quantity, every battery module can the exclusive use, consequently there must be the difference in every battery module number of times of use, service condition etc. consequently, it has the difference to lead to a plurality of battery module's present residual capacity to have the difference easily, the available capacity after filling up to have the difference etc.. At this time, under the unknown condition, the battery modules with great differences are combined together for use, so that the difficulty is increased for the charging and discharging management of the battery pack. In the scheme provided by the embodiment, one battery module is used for replacing another battery module to change the capacity or voltage of the battery pack, and the problem of mixed use of the battery modules in different initial states and use states does not exist, so that the difficulty in charging and discharging management of the battery pack is effectively reduced.

In some embodiments of the present invention, the battery module 202 includes a control circuit. Optionally, the control circuit includes a first control module and a second control module. The first control module controls a discharging process when the battery pack 200 is connected to the electric tool 100 and a charging process when connected to a conventional electric tool charger. The second control module controls the discharging process when the battery pack 200 or the battery module 202 is connected to the electronic device and the charging process when the battery pack or the battery module is charged through the USB interface or the wireless charging receiving module. Optionally, a first control module is disposed in the adapter 204 and a second control module is disposed in the battery module 202.

The present invention also provides a power tool 400 as shown in fig. 19, wherein the power tool 400 includes a housing, a motor disposed in the housing, and a battery pack interface 402 detachably coupled to a battery pack, wherein the battery pack interface 402 receives power from the battery pack to power the motor. The battery pack is composed of an adapter 600 and a battery module 500, and the adapter 600 is detachably connected with the battery module 500 in a sliding manner. The battery module 500 includes a case including an upper case 510a and a lower case 510b, and a battery cell pack received in the case, and the top surface of the upper case is provided with two parallel guide rails 511a and 511 b. The adapter 600 includes a tool interface 601 that removably couples to the battery pack interface 402. The adapter 600 further includes a battery interface 602, and the battery interface 602 has sliding grooves that cooperate with the guide rails 511a and 511b of the battery module 500, so that the battery module 500 can smoothly slide along the sliding grooves to a proper position on the adapter 600 for mating with the adapter 600. When the tool interface 601 of the adapter 600 is mated with the battery pack interface 402 of the power tool 400, the battery module 500 can provide power to the power tool 400 through the adapter 600. In other embodiments, the guide rails 511a and 511b may also be provided at the side or bottom of the case of the battery module 500.

In the embodiment shown in fig. 19, the battery module 500 further includes an electronic device interface 515 disposed on the housing, and as shown in fig. 20, the battery module 500 can be connected to an external electronic device charger through the electronic device interface 515 to charge the internal battery pack. Optionally, the electronic device interface 515 is a USB interface, such as a USB TYPE-a or USB TYPE-C interface. Typically, the electronic device product is an electronic product with a USB port, such as a mobile phone, a tablet computer, a notebook computer, and a USB-powered desk lamp.

The working current of the electric tool is generally 6-8A when the working current is small, 10-20A when the working current is large, and even 30-50A when the working current is large. Therefore, the energy storage module that can supply power to the power tool generally has a relatively strong discharge capability. As mentioned above, when the nominal full charge voltage of the battery pack 220 is higher than 20V, the power output through the electronic device interface is insufficient to fully charge the battery pack 220 supplying power to the power tool 100. The current voltage of the cell group 220 is fully charged to the nominal full charge voltage, and the received charge capacity reaches above the first preset proportion of the nominal capacity. Optionally the first predetermined proportion is 80%, optionally the first predetermined proportion is 90%. Illustratively, the battery pack 220 consists of 5 lithium battery cells connected in series. The following table 1 is a description of the nominal specification of a lithium battery cell in a specification of a lithium battery cell of a specific model provided by a certain cell manufacturer. The nominal full charge voltage is the highest voltage of the electric core group in the specification of the electric cores forming the electric core group in the standard charging mode, and the nominal capacity is the nominal discharge capacity of the electric cores in the specification. As can be seen from Table 1, the nominal full charge voltage of a single lithium battery cell is 4.15V-4.25V, and the nominal capacity is 2000 mAh. Based on this, the nominal full charge voltage of the energy storage module is 5 × V/cell (4.15-4.25) 20.75V-21.25V, and the nominal capacity of the energy storage module is 2000 mAh. When the electric core set 220 is full, the voltage of the whole package needs to reach 21V, and the charging capacity needs to reach 2000mAH 80% ~ 1600mAH or above.

Table 1: nominal specification of lithium battery cell

The present invention also provides a dc power supply as shown in fig. 9a-9d, the dc power supply comprising an energy storage module, an electronic device interface, and a charging circuit. The nominal full-charge voltage of the energy storage module is a first preset voltage, and the power voltage input by the electronic equipment interface is lower than the first preset voltage; the charging circuit is connected with the electronic equipment interface, and is used for raising the power supply voltage input by the electronic equipment interface to a first preset voltage to charge the energy storage module; and when the energy storage module finishes charging, the charging capacity of the energy storage module reaches more than 80% of the nominal capacity. According to the direct-current power supply provided by the utility model, when the charging voltage input from the outside is lower than the full charging voltage of the energy storage module, the energy storage module can still be fully charged.

The dc power supply provided by the present invention may be a conventional battery pack for an electric power tool, the battery pack 200 described in the foregoing embodiment of the present invention, the battery module 202 described in the foregoing embodiment of the present invention, the battery module 500, or any other repeatedly chargeable and dischargeable power supply. The dc power source can directly or indirectly power the power tool.

The dc power supply provided by the present invention is described below with reference to fig. 9a to 9 d. Illustratively, the energy storage module includes 5 electric core groups 220 that lithium electricity core is established ties and is constituteed, and energy storage module's full charge voltage is more than 20V, and the electronic equipment interface is the USB interface. The dc power supply further includes a charging circuit that interfaces with the electronic device. The USB interface receives external power input and charges the energy storage module through the charging circuit. The input voltage of the common USB interface is about 5V, and the input voltage of the USB type-c interface is about 20V. That is, the input voltage of the USB interface is lower than the full charge voltage of the dc power supply, but the dc power supply provided by the present invention can fill more than 80% of its nominal capacity at the end of charging. In order to achieve the effect, the utility model provides that a booster circuit is arranged in the direct current power supply to boost the electric energy received by the USB interface to the voltage reached when the direct current power supply is fully charged.

Fig. 9a shows a first preferred embodiment of the dc power charging circuit. The charging circuit in the direct current power supply comprises a PD module 340, a booster circuit arranged between the PD module 340 and the cell group 220, and a detection circuit for monitoring the charging state of the cell. Wherein the PD module 340 is a power transfer module that complies with a USB transfer protocol. The PD module 340 receives the cell state signal detected by the current detection circuit, and controls the output of the PD module 340 according to the detection signal. The output of the PD module is output to the electric core set 220 after passing through the voltage boost circuit, and charges the electric core set 220. In this embodiment, the charging circuit includes a dedicated charging chip, and the dedicated charging chip integrates a detection circuit (including a current detection circuit and a voltage detection circuit) and a voltage boost circuit. When the voltage of the electric core group 220 is nominally 18V and the full charge is 21V, the special charging chip outputs the highest 21V voltage, and the output current is designed according to the capacity of the electric core group 220, such as 2A, 2.5A, 3A, and the like.

Fig. 9b shows a second preferred embodiment of the dc power charging circuit. The difference between this embodiment and the first preferred embodiment is mainly that the boost circuit is not active at any time during the charging process, but only when the charging power is small. That is, when the charging power is large, the electric core set 220 is directly charged by the output of the USB PD module, and when the charging power is small, the output of the USB PD module (also referred to as PD module) passes through the voltage boosting circuit and then charges the electric core set 220.

Specifically, as shown in fig. 9b, the charging circuit of the dc power supply includes a PD module 340, a main control module 310, a first charging branch 330, and a second charging branch 320. The first charging branch 330 includes a switch S2, the second charging branch 320 includes a switch S1 and a voltage boosting circuit 321, and the first charging branch 330 and the second charging branch 320 are connected in parallel with each other. The first charging branch 330 directly transmits the output power of the PD module 340 to the cell group 220. The second charging branch 320 includes a voltage boosting circuit 321, which boosts the output power of the PD module 340 and transmits the boosted output power to the cell group 220. The energy storage module further comprises a detection circuit for detecting the state parameters of the cell group 220, the main control module 310 is connected with the detection circuit to acquire the parameters of the real-time charging current, the charging voltage, the real-time voltage, the current temperature, the current capacity and the like of the cell group 220 so as to monitor the charging state of the cell group 220, and the main control module 310 controls the first charging branch 330 and the second charging branch 320 to be alternatively switched on according to the charging state of the cell group 220 in the charging process. In the charging process of the electric core group 220, when the main control module monitors that the current charging current of the electric core group 220 reaches the minimum charging current, namely the first preset current, or the real-time voltage of the electric core group 220 reaches the full charging voltage, namely the first preset voltage, the electric core group 220 is judged to reach the full charging state, the control switch S1 or S2 is turned off, the connection between the electric core group 220 and the input power supply is cut off, and the charging is finished.

When the charging is started initially, the USB PD module 340 communicates with the charger to obtain the output voltage of the charger, gradually increase the output voltage of the USB interface to the output voltage of the charger, and the main control module 310 controls the switch S1 to be closed, so as to turn on the second charging branch 320; after charging is started, when the main control module 310 monitors that the charging current of the cell group 220 is greater than a second preset current greater than the first preset current, the cell group 220 is controlled to be switched to be charged directly by the output of the PD module 340 (i.e., the charging is performed through the first charging branch 330); when the second charging branch 320 is turned on, the output of the PD module 340 is boosted to the full charging voltage of the cell group 220 by the boost circuit 350 to charge the cell group 220 (i.e., the second charging branch 320 is used for charging); when the first charging branch 330 is turned on, if the main control module 310 monitors that the charging current of the cell group 220 reaches a second preset current, the control is switched to the second charging branch 320 to charge the cell group 220. The second preset current is larger than the first preset current.

For example, the maximum charging voltage of the charger of the general USB-type C interface is lower than the full charging voltage of the battery pack, and the battery pack cannot be fully charged, and the battery pack can be effectively fully charged by the boost circuit 350. Because the volume of the booster circuit is multiplied along with the increase of the output power of the booster circuit, when the power of the booster circuit is smaller, the volume of the booster circuit can be smaller, so that the booster circuit can be installed in a direct-current power supply, the volume of the direct-current power supply is not excessively increased, and the compactness of the direct-current power supply is kept; taking a 18V dc power supply as an example, referring to fig. 10, in a large current charging stage, i.e. a constant current charging stage, the charging power is relatively high, but the voltage requirement is not high, at this time, the output of the PD module is directly utilized to charge, at this time, the charging power is large, the charging speed is fast, in a small current charging stage, i.e. a constant voltage charging stage, the output of the voltage boosting PD module does not meet the voltage requirement of the electric core set 220, the boost circuit is required to start up, but the charging current is small at this time, the overall charging power is not high, therefore, the power of the voltage regulating circuit is not high, so that the boost circuit with small power can just meet the charging requirement of the electric core set 220, and the charging efficiency is not affected.

Fig. 9c shows a third preferred embodiment of the dc power supply, which includes an energy storage module, an electronic device interface and a charging circuit. The charging circuit includes a PD module 340, a main control module 310, a first charging circuit 330, a second charging circuit 320, a current detection circuit, and a voltage detection circuit. The energy storage module is 5 electric core groups 220 that lithium electricity core series connection is constituteed, and full charge voltage is more than 20V, does not include detection circuitry, comprises detection circuitry by the voltage detection circuit among the charging circuit and current detection circuit. The electronic equipment interface is a USB-type C interface (hereinafter referred to as a USB-C interface), and the input voltage of the USB-C interface is about 20V, namely the input voltage of the USB interface is lower than the full charge voltage of the cell pack 220. The electric core group 220 cannot be fully charged by directly utilizing the power voltage input by the USB interface, in order to fully charge the electric core group 220, a first charging branch 330 and a second charging branch 320 which are connected in parallel are arranged in the direct-current power supply, the first charging branch 330 only comprises an on-off switch S2, and the charging voltage output by the USB-C interface is received to directly charge the electric core group 220. The second charging circuit 320 includes an on-off switch S1 and a boosting circuit 321 connected in series, and the boosting circuit is a DC-DC circuit in this embodiment.

In this embodiment, the main control module 310 is an MCU, and the MCU is connected to the voltage detection circuit and the current detection circuit, receives signals transmitted by the voltage detection circuit and the current detection circuit, and controls one of the first charging branch 330 and the second charging branch 320 to be turned on or off based on the signals. The first charging branch 330 and the second charging branch 320 are switched to be alternately switched on or off in the charging process, so that the direct-current power supply provided by the utility model can be fully charged even if the input voltage of the USB interface is lower than the full-charging voltage of the direct-current power supply.

In the charging process, the main control module 310 monitors the charging state of the cell group 220 by connecting the current detection circuit and the voltage detection circuit in the charging circuit, detects the magnitude of the charging current of the cell group 220 through the current detection circuit, detects the magnitude of the real-time voltage of the cell group through the voltage detection circuit, and the main control module 310 transmits the acquired voltage signal and current signal to the PD module 340. When the current charging current of the electric core group 220 reaches the minimum charging current, i.e., the first preset current, or the real-time voltage of the electric core group 220 reaches the full charging voltage, i.e., the first preset voltage, the PD module 340 judges that the electric core group 220 reaches the full charging state, communicates with the PD module 360 in the charger, and the external electronic device charger stops inputting the power source, thereby ending the charging of the electric core group 220. Compared with the second preferred embodiment, the dc power supply of this embodiment terminates charging by cutting off the power supply of the external power supply, thereby avoiding the problem of overcharging of the cell pack 220 caused by the failure of the internal switch.

When the dc power supply is connected to the charger, the PD module 340 communicates with the external charger PD module 360 via the USB-C interface to obtain the input voltage of the external power supply, and the PD module controls the power supply voltage output by the USB-C interface to gradually increase to the input of the external power supply. When the charging is started initially, the main control module 310 controls the second charging branch 320 to be conducted, is connected to the PD module to obtain the output voltage of the charger, and performs voltage regulation control on the second charging branch according to the output voltage of the charger. After charging is started, when the power voltage output by the USB-C interface is greater than the real-time voltage of the energy storage module, the cell group 220 is switched to be directly charged by the output of the PD module (i.e., charging is performed through the first charging branch 330); the main control module 310 is further configured to control switching to a second charging branch circuit to be turned on when the first charging branch circuit is turned on and the charging current reaches a second current preset value larger than the minimum charging current; in another embodiment, the main control module 310 is further configured to control to switch to the second charging branch for conduction when the real-time voltage reaches a second preset voltage smaller than the full charging voltage of the cell pack 220; in another embodiment, the main control module 310 is further configured to control the second charging branch to be turned on when the real-time voltage reaches a second preset voltage smaller than the full-charge voltage of the battery cell group 220 and the charging current reaches a second preset current value larger than the minimum charging current. The minimum charging current of the battery cell group is the minimum charging current limited by the PD protocol.

Since the real-time voltage of the battery cell group 220 will continuously increase during the charging process, the charging current will continuously decrease, and the PD chip will end the charging by default when the charging current is less than the minimum current (e.g. 50mA or 100mA) limited by the PD protocol. When the cell group 220 is charged through the first charging branch 330 directly connected to the USB interface, since the power voltage output by the USB interface is less than the full charging voltage of the cell group 220, when the charging current on the first charging branch 330 reaches the minimum charging current, the PD module will control the charging to be finished, the real-time voltage of the cell group is less than the full charging voltage when the charging is finished, and the cell group cannot reach the full charging state. Therefore, in order to prevent the charging from ending before the electric core group is fully charged, the second charging branch circuit needs to be switched to perform boost charging before the charging current reaches the minimum charging current, so as to ensure that the direct current power supply can normally charge the battery pack until the charging current is less than a certain value (for example, 100mA), which indicates that the battery pack is fully charged, and then the charging is ended.

When the second charging branch 320 is turned on, if the current charging voltage of the dc power supply is less than the real-time voltage of the energy storage module, the output of the PD module is boosted to the full charging voltage of the cell group 220 through the boost circuit 321, and then the cell group 220 is charged (i.e. the charging is performed through the second charging branch 320). Therefore, the first charging branch circuit and the second charging branch circuit are controlled to be switched to be selected and conducted, when the power supply voltage input by the electronic equipment interface is smaller than the full charging voltage of the energy storage module, the energy storage module can be fully charged through the charging circuit in the direct current power supply of the embodiment, and when the direct current power supply finishes charging, the charging capacity received by the energy storage module reaches more than 80% of the nominal capacity of the energy storage module by setting the difference of the full charging cut-off to the current.

The following describes in detail a specific charging process of the dc power supply shown in fig. 9c with reference to fig. 21, where the charging process is as follows:

after the charger is plugged in, the charger PD module 350 communicates with the PD module 340 in the dc power supply, and meanwhile, the PD module establishes communication with the main control module 310, and at this time, the charging is started, and the following steps are performed:

s100, the main control module 310 controls the switch S1 to be closed, S2 to be open, the second charging branch 320 to be connected, the power voltage output by the USB interface 360 is regulated to a first preset voltage by the boost circuit 321 to charge the electric core pack 220, and the first preset voltage is equal to the nominal full-charge voltage of the electric core pack 220;

s200, the PD module 340 acquires power voltage output by the charger and transmits the power voltage to the main control module 310, and meanwhile, the main control module 310 acquires real-time voltage and charging current of the cell group 220 by connecting the current detection circuit and the voltage detection circuit;

s300, the main control module 310 judges whether the power supply voltage is greater than the real-time voltage of the cell group 220, and if so, executes the step S400; if not, executing step S600;

s400, the main control module 310 controls the switch S1 to be opened and the switch S2 to be closed;

s500, the first charging branch is conducted, the electric core group 220 is charged by the first charging branch, and the power supply voltage output by the USB interface 360 is directly output to the electric core group 220 for charging;

s600, the main control module 310 monitors the charging state of the cell pack 220, judges whether the current charging state reaches a charging switching condition, and if so, executes the step S700; if not, executing step S500;

the charging switching condition in step S600 is that the charging current of the electric core set 220 reaches a second preset current, or the real-time voltage of the electric core set 220 reaches any one of the second preset voltages, or a combination of the two conditions, wherein the second preset current is greater than the minimum charging current limited by the PD module 340, and the second preset voltage is less than the full-charge voltage of the electric core set 220. Alternatively, in an embodiment, the full-charge voltage of the battery cell group 220 is 21V, the second preset voltage is 20V, the second preset current value is 100mA, and the minimum charge current limited by the PD module is 50 mA.

S700, the main control module 310 controls the switch S2 to be opened and the switch S1 to be closed;

s800, the second charging branch is conducted, and the power supply voltage output by the USB interface 360 is regulated to a first preset voltage through the booster circuit 321 to charge the cell group 220;

s900, the main control module 310 judges whether the charging state of the cell group 220 meets the charging end condition, if so, the PD module 340 controls the USB interface to stop outputting electric energy, so that the cell group finishes charging; if not, the process returns to step S800.

In step S900, the charging end condition is any one of the condition that the charging current of the electric core set 220 reaches the minimum charging current limited by the PD module, or the condition that the real-time voltage of the electric core set 220 reaches the full charging voltage of the electric core set, or the combination of the two conditions.

As shown in fig. 9d, a fourth preferred embodiment of the dc power supply is different from the third preferred embodiment in that the main control module is integrated in the PD module 340, that is, the PD module with the function of the main control module is adopted, and the PD module is connected to the detection circuit, receives signals transmitted by the voltage detection circuit and the current detection circuit, and controls the first charging branch 330 and the second charging branch 320 to be turned on or off based on the signals.

The specific charging process of the dc power supply shown in fig. 9d is described in detail below with reference to fig. 22, and the charging process is as follows:

after the charger is plugged in, the charger PD module 350 communicates with the PD module 340 in the dc power supply, and at this time, starts charging, and performs the following steps:

s100, the PD module 340 controls the switch S1 to be closed, the second charging branch 320 is turned on, and the power supply voltage output by the USB interface 360 is regulated to the first preset voltage by the voltage boost circuit 321 to charge the electric core pack 220;

s200, the PD module 340 acquires the power supply voltage of the charger and the real-time voltage of the cell group;

s300, the PD module 340 judges whether the power supply voltage is greater than the voltage of the cell group, if so, the step S400 is executed; if not, executing step S600;

s400, when the voltage of the charger is greater than the voltage of the cell group, the PD module 340 controls the switch S1 to be switched off, the switch S2 is switched on, and the first charging branch is switched to charge;

s600, the PD module 340 monitors the charging state of the cell pack 220, judges whether the current charging state reaches a charging switching condition, and if so, executes the step S700; if not, executing step S500;

S700, the PD module 340 controls the switch S2 to be opened and the switch S1 to be closed;

s900, the PD module 340 judges whether the charging state of the cell group 220 meets the charging end condition, if so, the PD module 340 controls the USB interface to stop outputting electric energy, so that the cell group finishes charging; if not, the process returns to step S800.

The charging circuit provided in the dc power supply of the present invention is not limited to the above-described external power input type and the above-described dc power output voltage. The USB interface can be a common USB interface or a USB TYPE-C interface, and can also be an electronic equipment interface of other TYPEs, and the maximum output voltage of the direct-current power supply can also be the voltage of other values. The point is that the nominal full charge voltage of the energy storage module is higher than the input supply voltage of the electronic device interface. The nominal full-charge voltage of the energy storage module is defined as a first preset voltage, and optionally, the power input by the electronic device interface is lower than the first preset voltage. Optionally, the power input by the electronic device interface is about 80% of the first preset voltage. When the power supply voltage input by the electronic equipment interface is closer to the first preset voltage, the smaller the volume of the charging circuit is, and the more compact the size of the direct-current power supply is.

In order to fully charge a DC power supply when an input voltage of an electronic device interface is less than a maximum output voltage of the DC power supply, the utility model provides a charging circuit including a boosting circuit. However, in order to avoid an excessive increase in the size of the dc power supply by providing the booster circuit inside the dc power supply, the size of the charging circuit inside the dc power supply should be reduced as much as possible. An alternative embodiment is that shown in figures 9b and 9 c. Another alternative embodiment is to reduce the charging power of the dc power supply, thereby reducing the size of the dedicated charging chip as much as possible. The capacity of a single energy storage module is defined as X ampere hour, and the single energy storage module can be charged by charging the single energy storage module for 1 hour by using X current in 1C charging mode. Optionally, the maximum output charging current of the dedicated charging chip is smaller than the 1.5C charging current of a single energy storage module. Optionally, the maximum output charging current of the dedicated charging chip is 1C charging current of a single energy storage module, and thus the time required for fully charging the energy storage module is greater than or equal to 1 hour. Optionally, the DC-DC integrated circuit includes a 30W DC-DC chip, which is small and has little impact on the overall size of the DC power supply.

It should be noted that the "first preset voltage" and the "second preset voltage" in the embodiment of the present application are only used to distinguish the judgment conditions for the voltages under different conditions, and are not limited to the voltages, and according to the actual conditions, the magnitude relationship between the "first preset voltage" and the "second preset voltage" may be specifically set, for example, the first preset voltage and the second preset voltage may be equal and different, and for example, the first preset voltage may be greater than the second preset voltage.

Fig. 11 shows an eighth preferred embodiment of the battery pack. This embodiment focuses on the technical scheme of how to prevent the two battery modules from being charged when the battery pack includes the two battery modules connected in parallel. The battery pack includes an adapter and a battery module detachably mounted to the adapter. The battery module comprises a first battery module and a second battery module. The adapter comprises a tool power terminal group (T +/T-) detachably matched with the electric tool, an adapter first power terminal group (A1+/A1-) detachably matched with the first battery module, and an adapter second power terminal group (A2+/A2-) detachably matched with the second battery module. The first power supply terminal group A1+/A1-) and the second power supply terminal group (A2+/A2-) are connected in parallel to the tool power supply terminal group (T +/T-) and supply the electric energy of the first battery module and the second battery module to the electric tool in parallel.

The adapter also includes a control circuit disposed between the battery module and the power tool. As shown in fig. 12, the control circuit includes a first switch assembly, a second switch assembly, and a main control module. The first switch assembly is disposed between the adapter first power terminal set and the tool power terminal set. The second switch assembly is disposed between the adapter second power terminal set and the tool power terminal set. The main control module obtains a voltage difference value of the voltage of the first battery module and the voltage of the second battery module, when the voltage difference value of the first battery module and the second battery module is smaller than a preset voltage value, the first switch assembly and the second switch assembly are controlled to be closed, and the first battery module and the second battery module are connected in parallel to supply power to the electric tool. The main control module judges that the voltage difference value of the voltage of the first battery module and the voltage of the second battery module exceeds a preset voltage value, and controls the first switch assembly to be closed and the second switch assembly to be opened when the voltage of the first battery module is higher than the voltage of the second battery module, so that the first battery module with high voltage discharges firstly. Otherwise, the main control module judges that the voltage difference value between the voltage of the first battery module and the voltage of the second battery module exceeds a preset voltage value, and controls the second switch assembly to be closed and the first switch assembly to be opened when the voltage of the second battery module is higher than the voltage of the first battery module, so that the second battery module with high voltage discharges firstly. And when the master control module monitors that the voltage difference value between the first battery module and the second battery module is smaller than a preset voltage value, the first switch assembly and the second switch assembly are controlled to be both closed, and the first battery module and the second battery module are connected in parallel to supply power for the electric tool.

In other optional embodiments, when the main control module determines that the voltage difference between the first battery module and the second battery module exceeds the preset voltage value and the voltage of the first battery module is higher than the voltage of the second battery module, the main control module controls the first switch assembly to be closed and the second switch assembly to be intermittently closed. Otherwise, the main control module judges that the voltage difference value between the voltage of the first battery module and the voltage of the second battery module exceeds a preset voltage value, and controls the second switch assembly to be closed and the first switch assembly to be intermittently closed when the voltage of the second battery module is higher than the voltage of the first battery module. And when the master control module monitors that the voltage difference value of the first battery module and the second battery module is smaller than a preset voltage value, the first switch assembly and the second switch assembly are controlled to be continuously closed, and the first battery module and the second battery module are connected in parallel to supply power for the electric tool.

There are various methods for the main control module to obtain the voltage difference between the voltage of the first battery module and the voltage of the second battery module. The method comprises a scheme of directly obtaining the voltage difference value and a scheme of indirectly obtaining the voltage difference value. The scheme of directly obtaining the voltage difference value mainly obtains the voltage difference value of the first battery module and the second battery module by directly obtaining the voltage of the first battery module and the voltage of the second battery module. Optionally, the first battery module further includes a first battery module signal terminal group (BS) for transferring a state of the battery module to the outside, the second battery module further includes a second battery module signal terminal group (BS) for transferring a state of the battery module to the outside, the adapter includes an adapter first signal terminal group (AS1) and an adapter second signal terminal group (AS2) which are detachably and electrically connected to the first battery module signal terminal group and the second battery module signal terminal group, and the main control module obtains voltage values of the first battery module and the second battery module according to signals transferred by the adapter first signal terminal group (AS1) and the adapter second signal terminal group (AS 2). In another optional embodiment, the main control module controls the first switch assembly to be closed and the second switch assembly to be opened, the voltage value of the first battery module is acquired through the first power terminal group of the adapter, then the main control module controls the first switch assembly to be opened and the second switch assembly to be closed, and the voltage value of the second battery module is acquired through the second power terminal group of the adapter. The indirect obtaining of the voltage difference between the first battery module and the second battery module can be indirectly obtained by measuring the voltage difference between the two ends of the first switch component and the voltage difference between the two ends of the second switch component. When the voltage difference between the two ends of the first switch component and the voltage difference between the two ends of the second switch component are both smaller than a second preset voltage value, the voltage difference between the voltage of the first battery module and the voltage of the second battery module is smaller than a first preset voltage value, the main control module controls the first switch component and the second switch component to be closed, and the two battery modules are connected in parallel to supply power for the electric tool. When the voltage difference between the two ends of the first switch component is greater than the second preset voltage value, the voltage difference between the voltage of the first battery module and the voltage of the second battery module is greater than the first preset voltage value, and the voltage of the first battery module is higher than the voltage of the second battery module. When the voltage difference between the two ends of the second switch component is greater than the second preset voltage value, the voltage difference between the voltage of the first battery module and the voltage of the second battery module is greater than the first preset voltage value, and the voltage of the second battery module is higher than the voltage of the first battery module.

As shown in fig. 12, the first switching element includes two P-MOS transistors, which are connected in series with each other. The second switching component comprises two P-MOS transistors which are connected in series with each other. Since one transistor includes a parasitic diode directed from the D-pole to the S-pole and one transistor includes a parasitic diode directed from the S-pole to the D-pole, two back-to-back diodes are formed, preventing the first battery module and the second battery module from being charged with each other in the standby state.

As shown in fig. 12, the adapter further includes a tool signal Terminal Set (TS) for detachable connection to the power tool and a power-on self-locking circuit. A tool signal Terminal Set (TS) is used for transmitting electric signals between the adapter and the electric tool. The power-on self-locking circuit is arranged between the main control module and the first power supply terminal group of the adapter as well as between the main control module and the second power supply terminal group of the adapter. The power-on self-locking circuit comprises an open state and a closed state. And under the disconnection state, the main control module is in a power-down state and enters a sleep mode. And in the closed state, the main control module is in a power-on state and starts to work. When a starting switch (S1) of the electric tool is closed, the tool signal terminal group receives a trigger signal, and the power-on self-locking circuit is switched from an open state to a closed state. Specifically, the power-on self-locking circuit comprises a first electronic switch Q5 and a second electronic switch T3. The switch Q5 is disposed between the adapter first and second power terminal sets and the DC/DC module. The DC/DC module is used for converting the voltage of the battery module into a voltage suitable for supplying power to the main control module. When the switch Q5 is in an off state, the DC/DC module cannot obtain the electric energy of the battery module, and the main control module is in a power-down state and enters a sleep mode. When the switch Q5 is in a closed state, the DC/DC module obtains the power of the battery module and converts the power into a voltage suitable for supplying power to the main control module, and the main control module obtains the power and starts working. As shown in fig. 12, at the instant when the start switch S1 of the power tool is closed, the G pole of the switch Q5 is in a low state via the tool signal terminal group, thereby triggering the switch Q5 to close. Meanwhile, once the switch Q5 is closed, after the main control module is powered on, a control signal is sent out to enable the switch T3 to be in a closed state, so that the G pole of the switch Q5 is kept in a low level state, the switch Q5 is locked in the closed state, the main control module is continuously powered on, and the operations are started, such as obtaining a voltage difference value between the first battery module and the second battery module, controlling the states of the first switch assembly and the second switch assembly, and the like.

In this embodiment, when only one battery module is mounted on the adapter, or only one battery module is in good contact with the adapter although a plurality of battery modules are mounted on the adapter, or only one battery module satisfies the discharge condition although a plurality of battery modules are mounted on the adapter, the main control module controls the switch assembly corresponding to the battery module to be closed and the other switch assemblies to be opened when the main control module recognizes the above condition through the adapter signal terminal group or the adapter power terminal group, and the battery module supplies power to the electric power tool. Therefore, even under the condition that only one battery module can work, the battery pack can still supply power to the electric tool.

The operation flow of the present embodiment will be described below with reference to fig. 13a and 13 b.

Fig. 13a is a first preferred embodiment of the working procedure of this embodiment. Before a trigger signal of the electric tool is not received, namely before a starting switch of the electric tool is closed, the battery pack is in a sleep mode, and consumes little electric quantity. As shown in steps S0 and S2, once the start switch of the power tool is closed, the tool signal terminal set outputs a low-level trigger signal, which is sent to the power-on self-locking circuit, the power-on self-locking circuit is switched from the open state to the closed state, and the main control module is powered on to start working. Subsequently, the flow proceeds to step S4.

Step S4, determine whether the first battery module and the second battery module are both connected to the adapter, if not, go to step S10. If the determination result is yes, the process proceeds to step S8. If the judgment result is negative, it indicates that one of the first battery module and the second battery module is accessed to the adapter, and the other battery module is not accessed to the adapter, and it is not the case that both the two battery modules are not accessed to the adapter. There are many ways to determine whether the battery module is connected to the adapter, for example, by determining whether the signal terminal set of the adapter receives a predetermined signal, or by determining whether the power terminal set of the adapter receives a predetermined voltage, or by providing an inductive element in the battery module and the adapter, it is determined whether the adapter is connected to the battery module in a non-contact manner.

And step S10, controlling the first switch component or the second switch component to be closed, so that the battery module connected into the adapter supplies power to the electric tool. Subsequently, the flow proceeds to step S12.

Step S12, determine whether the battery module has reached the over-discharge protection condition. Over-discharge protection conditions include, but are not limited to, at least one of: 1) the whole package voltage of the battery module is lower than the preset voltage; 2) the voltage of a single battery cell in the battery module is lower than a preset voltage; 3) The discharging current of the battery module is greater than the preset current; 4) the temperature of the battery module is higher than a preset temperature. If yes, the over-discharge protection of the battery module is required, and the process goes to step S14 to stop discharging the battery module, i.e., to control the first switch assembly or the second switch assembly to be turned off. When the determination result is no, the process returns to step S10.

After the step S14, the process proceeds to a step S16, and the main control module enters a sleep state. Specifically, as shown in fig. 12, the main control module sends a control signal to control the switch T3 to be turned off, so as to control the switch Q5 to be turned off, so that the electronic lock circuit is turned off, and the main control module enters a sleep state after power failure, thereby reducing power consumption of the battery module.

In step S8, it is determined whether the difference between the voltage of the first battery module and the voltage of the second battery module exceeds a predetermined voltage value. The determination method is as described above and will not be described herein again. If the determination result is no, the process proceeds to step S18. If the determination result is yes, the process proceeds to step S22.

Step S18, the first switch assembly and the second switch assembly are closed, so that the first battery module and the second battery module supply power to the electric tool in parallel. Subsequently, the flow proceeds to step S20.

Step S20, it is determined whether the first battery module and the second battery module reach the over-discharge protection condition. The overdischarge protection conditions were as described above. If the determination result is yes, the process proceeds to step S14. When the determination result is no, the process returns to step S18.

In step S22, it is determined whether the voltage of the first battery module is greater than the voltage of the second battery module. If the result is yes, it indicates that the voltage of the first battery module is greater than the voltage of the second battery module, and the voltage difference between the first battery module and the second battery module exceeds the preset voltage value, then the process goes to step S24. In step S24, the first switch assembly is closed and the second switch assembly is opened. The beneficial effect of doing so is that only first battery module discharges, and the second battery module does not discharge, effectively avoids when both connect in parallel and discharge simultaneously, and first battery module charges to the second battery module, causes the damage of battery module. If the determination result in the step S22 is "no", it indicates that the voltage of the second battery module is greater than the voltage of the first battery module, and the voltage difference between the two exceeds the predetermined voltage value, and then the process proceeds to a step S32. In step S32, the second switch assembly is closed and the first switch assembly is opened. The beneficial effect of doing so is that only the second battery module discharges, and first battery module does not discharge, effectively avoids when both connect in parallel and discharge simultaneously, and the second battery module charges to first battery module, causes the damage of battery module.

After step S24, the flow proceeds to step S26. In step S26, it is determined whether the first battery module has reached the overdischarge protection condition.

If the determination result is yes, the process proceeds to step S28. When the determination result is no, the process returns to step S24.

In step S28, the first switch assembly is opened and the second switch assembly is closed. That is, the discharge of the first battery module is stopped, and the discharge of the second battery module is started. Subsequently, the process proceeds to step S30, where it is determined whether the second battery module has reached the over-discharge protection condition. If the determination result at step S30 is yes, the process proceeds to step S14. If the determination result in step S30 is no, the process returns to step S28.

After step S32, the flow proceeds to step S34. In step S34, it is determined whether the second battery module has reached the over-discharge protection condition.

If the determination result is yes, the process proceeds to step S36. When the determination result is no, the process returns to step S32.

In step S36, the second switch assembly is opened and the first switch assembly is closed. That is, the discharge of the second battery module is stopped, and the discharge of the first battery module is started. Subsequently, the process proceeds to step S38, where it is determined whether the first battery module meets the over-discharge protection condition. If the determination result at step S38 is yes, the process proceeds to step S14. If the determination result in step S38 is no, the process returns to step S36.

Fig. 13b shows a second preferred embodiment of the working procedure of this embodiment. The flowchart of the present embodiment is substantially the same as the flowchart shown in fig. 13b, except for steps S24, S26, S32, and S34. Specifically, in step S24 of this embodiment, the first switch assembly is continuously closed, and the second switch assembly is intermittently closed. The effect of realization is that the higher first battery module of voltage lasts for the electric tool power supply, and the lower second battery module of voltage is intermittent type and is supplied power for electric tool, and second battery module is intermittent type promptly and is parallelly connected with first battery module and supplies power to electric tool. Even if the first battery module discharges to the second battery module due to the voltage difference between the first battery module and the second battery module, the average discharge current is small because the discharge is intermittent, and the battery modules cannot be damaged greatly. After step S24, the flow proceeds to step S26. In step S26, it is determined whether the first battery module and the second battery module reach the over-discharge protection condition, and if yes, the process proceeds to step S14 to stop discharging of the electric tool by the battery modules. In step S26, if the determination result is negative, the process returns to step S24. In step S32, the second switch assembly is continuously closed, and the first switch assembly is intermittently closed. The effect of realization is that the second battery module that voltage is higher lasts for the electric tool power supply, and the first battery module that voltage is lower intermittent type gives the electric tool power supply, and first battery module intermittent type promptly is parallelly connected with the second battery module and is supplied power to the electric tool. Even if the second battery module discharges to the first battery module due to the voltage difference between the second battery module and the first battery module, the average discharge current is small because the discharge is intermittent, and the battery modules cannot be damaged greatly. Step S32 is followed by step S34. In step S34, it is determined whether the first battery module and the second battery module reach the over-discharge protection condition, and if yes, the process proceeds to step S14 to stop discharging of the electric tool by the battery modules. In step S34, if the determination result is negative, the process returns to step S32.

Fig. 14 shows a ninth preferred embodiment of the battery pack. In this embodiment, it is emphasized that the battery pack includes two battery modules connected in parallel, and each battery module includes a charging power supply module, where one of the charging power supply modules receives an external power input, and the other charging power supply module does not receive the external power input, and how to charge the two battery modules simultaneously. The battery pack comprises an adapter, a first battery module and a second battery module, and the electric energy of the first battery module and the electric energy of the second battery module are supplied to the electric tool through the adapter. The adapter comprises a tool power terminal group (T +/T-) detachably matched with the electric tool, an adapter first power terminal group (A1+/A1-) and an adapter first signal terminal group (AS1) detachably matched with the first battery module, and an adapter second power terminal group (A2+/A2-) and an adapter second signal terminal group (AS2) detachably matched with the second battery module. The first battery module is detachably mounted on the adapter and comprises a first battery module power terminal group (B +/B-) connected with the first power terminal group of the adapter, a first battery module signal terminal group (BS) connected with the first signal terminal group of the adapter and a first charging power module for receiving external charging energy to charge the first battery module. The first power terminal group is connected with the positive and negative electrodes of the first battery module. The first battery module signal terminal group transmits the state signal of the first battery module to the outside. The second battery module is detachably mounted on the adapter and comprises a second battery module power terminal group connected with the second power terminal group of the adapter, a second battery module signal terminal group connected with the second signal terminal group of the adapter and a second charging power module for receiving external charging energy to charge the second battery module. The second power supply terminal group is connected with the positive electrode and the negative electrode of the second battery module. The second battery module signal terminal group transmits the state signal of the second battery module to the outside. The adapter also includes a master control module and a switch assembly. The first power supply terminal group of the adapter and the second power supply terminal group of the adapter are connected in parallel through the switch assembly. When the first charging power supply module receives external charging energy input and the second charging power supply module does not receive the external charging energy input, the first battery module signal terminal group sends a trigger signal to the first signal terminal group of the adapter connected with the first battery module signal terminal group, and the main control module controls the switch assembly to be closed, so that the first charging power supply module can charge the first battery module and also can charge the second battery module. On the contrary, when the second charging power supply module receives external charging energy input and the first charging power supply module does not receive the external charging energy input, the second battery module signal terminal group sends a trigger signal to the second signal terminal group of the adapter connected with the second battery module signal terminal group, and the main control module controls the switch assembly to be closed, so that the second charging power supply module can charge the second battery module and also can charge the first battery module.

Fig. 15 is a block circuit diagram of an alternative embodiment of the battery module, to which reference is made for the block circuit diagrams of the first battery module and the second battery module. The battery module comprises a battery pack, a charging management module, a charging power supply module, a trigger signal generation module and an adapter interface. The battery module interface comprises a battery module power terminal group and a battery module signal terminal group. The charging management module in the battery module is electrically connected with the charging power supply module, when the battery module receives input of external charging energy, the trigger signal generation module outputs a high level signal, and the high level signal is the trigger signal. The trigger signal is transmitted to the adapter signal terminal group through the battery module signal terminal group. Optionally, the battery module signal terminal group includes an S signal terminal and a D signal terminal, and the two terminals may be independently arranged or one terminal may be time-division multiplexed. The S signal terminal passes analog signals, such as high level signals. And the D signal terminal transmits a digital signal, such as a signal of the current charge-discharge state of the battery core in the battery module. The S-signal terminal and the D-signal terminal also correspondingly receive signals delivered thereto by the adapter.

In the particular implementation shown in fig. 12, the switch assembly includes a first switch assembly and a second switch assembly, the first switch assembly being disposed between the adapter first power terminal set and the tool power terminal set. The second switch assembly is disposed between the first power terminal set of the adapter and the tool power terminal set. The adapter includes a first power terminal group and a second power terminal group. The second power terminal group of the adapter is connected in parallel through the first switch assembly and the second switch assembly.

Before the main control module controls the first switch assembly and the second switch assembly to be closed, acquiring the voltage of the first battery module and the voltage of the second battery module, judging whether the voltage of the first battery module and the voltage of the second battery module meet preset conditions or not, and when the judgment result is yes, controlling the first switch assembly and the second switch assembly to be closed; and when the judgment result is negative, controlling the first switch assembly and the second switch assembly to be disconnected. There are various ways for the main control module to obtain the voltages of the first battery module and the second battery module. Optionally, the main control module controls the first switch assembly to be closed and the second switch assembly to be opened, and the voltage value of the first battery module is obtained through the first battery module power terminal set. The main control module controls the first switch assembly to be disconnected and the second switch assembly to be closed, and the voltage value of the second battery module is obtained through the power terminal group of the second battery module. The main control module can also directly acquire the voltage of the first battery module through the signal transmitted by the first battery module signal terminal group, and acquire the voltage of the second battery module through the signal transmitted by the second battery module signal terminal group. As shown in fig. 12, the main control module is provided with different ports to receive the trigger signal of the first battery module signal terminal group and the trigger signal of the second battery module signal terminal group, so as to identify which battery module sends the trigger signal to the adapter. When the main control module judges that the trigger signal comes from the first battery module signal terminal group, the preset condition is whether the voltage of the first battery module is not lower than the voltage of the second battery module. When the main control module judges that the trigger signal comes from the second battery module signal terminal group, the preset condition is whether the voltage of the second battery module is not lower than the voltage of the first battery module.

A first battery module charging management module in the first battery module monitors the state of the first battery module and controls the charging process of the first charging power supply module on the first battery module. And the second battery module charging management module monitors the state of the second battery module and controls the charging process of the second battery module by the second charging power supply module. When the first charging power supply module receives external charging energy input and the second charging power supply module does not receive the external charging energy input, the charging management of the first battery module is completed by the first battery module charging management module, and the charging management of the second battery module is completed by the main control module. Otherwise, when the second charging power supply module receives external charging energy input and the first charging power supply module does not receive the external charging energy input, the charging management of the second battery module is completed by the second battery module charging management module, and the charging management of the first battery module is completed by the main control module. The main control module is used for managing the charging of the battery module and controlling at least one of the first switch assembly and the second switch assembly to be disconnected when the first charging power supply module receives external charging energy input and the main control module judges that the second battery module is full according to a signal transmitted by a signal terminal of the second battery module. When the second charging power supply module receives external charging energy input and the main control module judges that the first battery module is fully charged according to a signal transmitted by the signal terminal of the first battery module, at least one of the first switch assembly and the second switch assembly is controlled to be disconnected.

As shown in fig. 15, the first charging power supply module and the second charging power supply module include USB-C PD modules, i.e., USB TYPE C energy transfer protocol. The USB TYPE C energy transmission protocol receives power input of an external USB-C (namely, USB TYPE C) interface and converts the power input into energy suitable for charging the battery module. As shown in fig. 15, the first charging power supply module and the second charging power supply module further include a wireless charging receiving module. The wireless charging receiving module receives energy sent by the external wireless charging transmitting module and converts the energy into energy suitable for charging the battery module.

Referring to fig. 12, the adapter further includes a power-on self-locking circuit disposed between the first power terminal group and the second power terminal group of the adapter and the main control module. When the power-on self-locking circuit does not receive the trigger signal of the first signal terminal group or the second signal terminal group of the adapter, the switch T4 is in an off state, so that the switch Q5 is in an off state, and therefore, the power-on self-locking circuit is in the off state. The electric energy provided by the battery module cannot be transmitted to the DC/DC module, so that the power supply for the main control module cannot be realized, and the main control module is in a power-down state and enters a sleep mode. When the power-on self-locking circuit receives a trigger signal of the first signal terminal group or the second signal terminal group of the adapter, the switch T4 is in a closed state, so that the switch Q5 is in a closed state, and therefore the power-on self-locking circuit is in a closed state. The electric energy provided by the battery module supplies power to the main control module through the DC/DC module, and the main control module is in a power-on state and starts to work. That is to say, before receiving the trigger signal from the signal terminal group of the battery module, the main control module is in a power-down state, and consumes little electric energy, so that the battery pack consumes little power in a non-working standing state, and the standby time is prolonged. In addition, when the main control module judges that the trigger signal comes from the first battery module and the second battery module is not connected, the power-on self-locking module is controlled to be switched from a closed state to an open state; or when the main control module judges that the trigger signal comes from the second battery module and the first battery module is not connected, the power-on self-locking module is controlled to be switched from a closed state to an open state. Because the charging management of the battery module is managed and controlled by the charging management module inside the battery module, the battery pack does not need the main control module to participate in any work.

The operation flow of the present embodiment will be described below with reference to fig. 16. Before the trigger signal from the first battery module signal terminal group or the second battery module signal terminal group is not received, the battery pack is in a dormant mode, and consumes little electric quantity. As shown in steps S0 and S2, once the first charging power supply module or the second charging power supply module receives the external charging energy input, the corresponding first battery module signal terminal set or the second battery module signal terminal set sends a high-level trigger signal to the adapter. The high-level trigger signal enables the power-on self-locking circuit to be switched from an open state to a closed state, and the main control module is powered on to start working. Subsequently, the flow proceeds to step S4.

Step S4, it is determined whether the first battery module and the second battery module are both connected to the adapter. If the judgment result is negative, it indicates that only one battery module is accessed, the other battery module is not accessed to the adapter, the battery module of the intervention adapter receives external charging energy input, and no other battery module needs to be charged by the charging power supply module in the battery module, so that the main control module in the adapter does not need to work continuously. At this time, step S18 is entered, and the main control module enters a sleep state of power down, i.e. a low power consumption state. If the determination result in the step S4 is yes, the process proceeds to a step S6. If the judgment result is negative, the two battery modules do not access the adapter, and because the main control module cannot be powered on if the two battery modules do not access the adapter, the judgment of whether the battery modules access the adapter cannot be executed. There are many ways to determine whether the battery module is connected to the adapter, for example, by determining whether the signal terminal set of the adapter receives a predetermined signal, or by determining whether the power terminal set of the adapter receives a predetermined voltage, or by providing an inductive element in the battery module and the adapter, it is determined whether the adapter is connected to the battery module in a non-contact manner.

In step S6, it is determined whether the trigger signal is from the first battery module. The main control module judges whether the trigger signal comes from the first battery module according to which input port the trigger signal comes from. And if so, indicating that the first battery module and the second battery module are both connected to the adapter, and the first charging power supply module receives external charging energy input to prepare for starting charging of the first battery module. Considering that the second charging power module does not receive external charging energy input, the second battery module needs to be charged by introducing the electric energy of the first charging power module to the second battery module through the adapter. Before the electric energy of the first charging power supply module is introduced into the second battery module, it needs to be judged whether the first charging power supply module is suitable for simultaneously charging the first battery module and the second battery module. Therefore, if the determination result in the step S6 is yes, the process proceeds to a step S8. If the determination result in the step S6 is negative, it indicates that the first battery module and the second battery module are both connected to the adapter, and the second charging power module receives external charging energy input to prepare for starting charging of the second battery module. Considering that the first charging power module does not receive external charging energy input, the first battery module needs to be charged by introducing the electric energy of the second charging power module into the first battery module through the adapter. Before the electric energy of the second charging power supply module is introduced into the first battery module, it needs to be judged whether the second charging power supply module is suitable for simultaneously charging the first battery module and the second battery module. Therefore, if the determination result in the step S6 is negative, the process proceeds to a step S20.

Step S8 and step S20 are both to acquire the voltage of the first battery module and the voltage of the second battery module, and to determine that the voltages of the first battery module and the second battery module satisfy the preset conditions. The voltage of the first battery module and the voltage of the second battery module are acquired as described above. The preset condition in step S8 is whether the voltage of the first battery module is not lower than the voltage of the second battery module. The preset condition in step S20 is whether the voltage of the second battery module is not lower than the voltage of the first battery module. In step S8, if the determination result is negative, the process proceeds to step S9; if the determination result is yes, the process proceeds to step S10. In step S20, if the determination result is negative, the process proceeds to step S28; if the determination result is yes, the process proceeds to step S22.

Step S10, the first switch assembly and the second switch assembly are closed, the first charging power supply module simultaneously charges the first battery module and the second battery module, and then the process proceeds to step S12. Step S22, the first switch assembly and the second switch assembly are closed, the second charging power supply module simultaneously charges the first battery module and the second battery module, and then the process proceeds to step S24.

Both of the step S9 and the step S28 acquire the voltage of the first battery module and the voltage of the second battery module. And then returning to the steps S8 and S20, respectively, to continuously determine that the voltage of the first battery module and the voltage of the second battery module satisfy the preset conditions.

In step S12, the main control module obtains the charging state of the second battery module. The acquisition mode is through the adapter second power terminal group or the adapter second signal terminal group. Then, in step S14, the main control module determines whether the second battery module is fully charged based on the charging status of the second battery module. The reason why whether the second battery module is fully charged is controlled by the main control module, rather than the second charging management module therein, is that whether the first charging power module charges the second battery module is controlled by the main control module. Meanwhile, the charging process of the first battery module is controlled by the first charging management module in the first battery module, and the main control module is not required to participate. In step S24, the main control module obtains the charging state of the first battery module. The acquisition mode is through the first power terminal group of adapter or the first signal terminal group of adapter. Then, in step S26, the main control module determines whether the first battery module is fully charged based on the charging status of the first battery module. The reason why whether the first battery module is fully charged is controlled by the main control module, rather than the first charging management module therein, is that whether the second charging power module charges the first battery module is controlled by the main control module. Meanwhile, the charging process of the second battery module is controlled by the second charging management module in the second battery module, and the main control module is not required to participate.

If the determination results in step S14 and step S26 are yes, the process proceeds to step S16. When the determination results in step S14 and step S26 are no, the process returns to step S12 and step S24, respectively.

In step S16, the master control turns off the first switch assembly and the second switch assembly. And then controlling the power-on self-locking circuit to enter a disconnected state, powering down the main control module, and entering a dormant state, as shown in step S18.

The present invention also provides a tenth embodiment of a battery pack. The tenth embodiment will be described below with reference to fig. 12 and 14. The battery pack includes an adapter and a battery module, and the battery module is detachably mounted to the adapter. The battery module comprises a plurality of battery cores, a battery module power terminal group for outputting electric energy outwards and a battery module signal terminal group for outputting an electric signal outwards. The adapter is detachably connected with the electric tool and supplies the electric power of the battery module to the electric tool. The adapter also comprises an adapter power terminal group detachably connected with the battery module power terminal group, an adapter signal terminal group detachably connected with the battery module signal terminal group, a tool power terminal group detachably connected with the electric tool, a tool signal terminal group detachably connected with the electric tool, a main control module and a power-on self-locking circuit. The main control module consumes the electric energy of the battery module to start work. The power-on self-locking circuit is arranged between the main control module and the adapter power terminal group and can be selectively in an open state or a closed state. When the power-on self-locking circuit is in a disconnected state, the main control module is in a power-off state and enters a sleep mode. When the power-on self-locking circuit is in a closed state, the main control module is in a power-on state and starts to work. When the power-on self-locking circuit receives an external trigger signal, the power-off state is switched to the closed state, and correspondingly, the main control module is switched to the power-on state from the power-off state and starts working. The trigger condition for switching the power-on self-locking circuit from the open state to the closed state is described below with reference to fig. 12.

As shown in fig. 12, when the start switch S1 of the power tool is closed, the group of tool signal terminals connects the diode D6 of the power-on self-locking circuit to ground, the G pole of the switch Q5 receives a low-level signal instantaneously, so that the switch Q5 is closed, and the power-on self-locking circuit is switched from the open state to the closed state. With reference to fig. 12, when the first charging power supply module receives an external charging energy input, the first signal terminal group of the adapter outputs a high-level trigger signal to the power-up self-locking circuit, so that the switch T4 is instantly closed, the G pole of the switch Q5 instantly obtains a low-level signal, the switch Q5 is caused to be closed, and the power-up self-locking circuit is switched from the open state to the closed state. Similarly, when the second charging power supply module receives external charging energy input, the second signal terminal group of the adapter outputs a high-level trigger signal to the power-on self-locking circuit, so that the switch T4 is instantly closed, the G pole of the switch Q5 instantly obtains a low-level signal, the switch Q5 is prompted to be closed, and the power-on self-locking circuit is switched from an open state to a closed state.

After any one of the above conditions triggers the power-on self-locking circuit to switch from the off state to the on state, the main control module starts to work and sends a control signal to the switch T3 of the power-on self-locking circuit, so that the power-on self-locking circuit is continuously in the on state, the G pole of the switch Q5 continuously obtains a low level signal, the power-on self-locking circuit is continuously in the on state, and the main control module continuously works. And once the main control module needs to enter the sleep state, the main control module sends a control signal to the switch T3 of the power-on self-locking circuit, so that the power-on self-locking circuit is switched from the closed state to the open state, the switch Q5 is switched off, and the power-on self-locking circuit is switched from the closed state to the open state. The following describes the triggering condition that the master control module needs to enter the sleep state with reference to fig. 12, 13a, 13b, and 16, respectively.

As shown in fig. 12, when the start switch S1 of the power tool is turned off, the main control module detects that the start switch is turned off through the tool signal terminal set, and determines that the discharging process of the battery pack is finished and the main control module needs to enter the sleep state.

As shown in fig. 12-13b, after the main control module determines that the battery module reaches the over-discharge protection condition, the main control module stops discharging the battery module and then enters the sleep state.

As shown in fig. 12 and 16, the main control module determines that only one battery module is connected, and when the trigger signal is from the adapter signal terminal set and the tool signal terminal set is not, it indicates that the battery module is about to enter the charging mode or the non-discharging mode, and the charging power of the battery module is from its own charging power module. At this time, the main control module enters a dormant state without continuously working.

In the above embodiment, the battery package can directly supply power for electric tool, and the battery module in the battery package can supply power for domestic equipment for the battery package can supply power for electric tool, can supply power for domestic equipment again, has improved the commonality of battery package, and need not change current electric tool and domestic equipment appearance, does not influence the pleasing to the eye of each product.

In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A dc power supply, comprising:

an adapter including a tool interface and an adapter interface, the tool interface being removably matable with the power tool to provide power received from the adapter interface to the power tool;

the battery module is detachably arranged on the adapter and comprises a battery module interface, and the battery module interface is detachably connected with the adapter interface and supplies electric energy to the adapter interface;

and the electronic equipment interface receives the input of an external power supply and charges the direct-current power supply.

2. The dc power supply of claim 1, wherein the electronic device interface is a USB type-c interface.

3. The dc power supply of claim 2, wherein the electronics interface is disposed on an adapter.

4. The dc power supply of claim 2, wherein the electronics interface is disposed on the battery module.