Charging combination and electric tool

Abstract

The utility model discloses a charging combination and an electric tool, the charging combination comprises a first charger and a battery pack, the first charger is configured to charge the battery pack, and the battery pack is configured to supply power to the electric tool. The battery pack comprises a battery pack interface which can be detachably connected to the first charger or the electric tool, and the battery pack interface comprises a battery pack terminal. The battery pack further comprises a battery pack shell; the battery cell unit is arranged in the battery pack shell; a first interface provided to be connected with the first charger to introduce power; wherein the first charger comprises a first charging interface detachably connected with the first interface, the battery cell unit is a bag-shaped battery cell, and the first interface is a Type-C interface. The battery pack for supplying power to the electric tool in the charging combination can be charged more quickly, the efficiency is higher, the endurance time is longer, and the size is smaller.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tools, in particular to a charging combination and a power tool. BACKGROUND

[0002] The power tool in the related art generally includes a tool main machine and a battery pack. The existing tool main machine generally has a high-voltage platform power tool and a low-voltage platform power tool. Among them, the energy density of the battery pack in the low-voltage platform power tool is low, so that the endurance time of these power tools is short. The charging efficiency of the charger for charging the battery pack is low.

[0003] This part provides background information related to the present application, which may not be prior art. UTILITY MODEL CONTENT

[0004] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide a charging combination with a battery pack having higher charging efficiency and longer endurance time.

[0005] In order to achieve the above object, the technical scheme adopted by the present application is as follows:

[0006] A charging combination includes a first charger and a power tool, the power tool includes: a tool main machine including a main machine shell and a motor contained in the main machine shell; a battery pack configured to power the motor; the first charger is configured to charge the battery pack; the battery pack includes: at least one cell unit configured to store energy; the battery pack is detachably combined to the tool main machine, or the battery pack is built-in in the main machine shell; wherein the first charger includes a first charging interface electrically connected to the battery pack to charge the battery pack, the cell unit is a bag-shaped cell, and the first charging interface is a Type-C interface.

[0007] In some embodiments, the battery pack is detachably combined to the tool main machine, and the battery pack includes a first interface matched with the first charging interface, the first interface is configured to allow the first charger to charge the battery pack when the battery pack is installed to the tool main machine.

[0008] An electric power tool, comprising: a tool main body including an output member for outputting power, an electric motor for driving the output member to move, and a main body housing accommodating at least part of the electric motor; a battery pack for detachably connecting to the main body housing to supply power to the electric motor; wherein the tool main body includes a main body interface, the battery pack includes a battery pack interface cooperating with the main body interface, the main body interface and the battery pack interface are connected when the battery pack is mounted to the tool main body, the battery pack further includes: a battery pack housing; a cell unit arranged in the battery pack housing and electrically connected with the battery pack interface; a first interface arranged on the battery pack housing for charging the battery pack; the cell unit is a pouch cell, at least part of the cell unit is located in the main body housing and the first interface is located outside the main body housing when the battery pack is combined with the tool main body, and the first interface is a type-c interface.

[0009] In some embodiments, the first interface is arranged to allow access to electrical energy for charging the battery pack when the battery pack is mounted to the tool main body.

[0010] In some embodiments, the main body housing includes a holding portion for a user to hold, at least part of the cell unit is located in the holding portion and the first interface is located outside the holding portion when the battery pack is combined with the tool main body.

[0011] In some embodiments, the holding portion extends along a first linear direction, and the battery pack is combined with the holding portion along the first linear direction.

[0012] In some embodiments, the first interface is arranged to allow access to electrical energy for charging the battery pack when the battery pack is mounted to the tool main body and the electric power tool is running.

[0013] A battery pack suitable for an electric power tool, comprising: a battery pack housing formed with a combination portion for connecting with an electric power tool; a cell unit arranged in the battery pack housing; a power management board arranged in the battery pack housing; a battery pack interface for connecting with the electric power tool to supply power to the electric power tool; a wireless charging device arranged to cooperate with a wireless charging apparatus to charge the cell unit, wherein the cell unit is a pouch cell, and the wireless charging device is connected with the power management board.

[0014] In some embodiments, the maximum charging power of the wireless charging device is less than or equal to 15W.

[0015] In some embodiments, the maximum charging power of the wireless charging device is greater than 15W.

[0016] In some embodiments, the number of the cell units includes a plurality, the plurality of the cell units are stacked, the wireless charging device includes a receiving coil, and the receiving coil is disposed at least partially at an end of the plurality of the cell units.

[0017] In some embodiments, the battery pack interface is disposed at another end of the plurality of the cell units.

[0018] A charging assembly includes a battery pack and a wireless charging device configured to charge the battery pack, the battery pack including a battery pack housing, cell units disposed within the battery pack housing, a power management board disposed within the battery pack housing, a battery pack interface configured to connect with a power tool to provide power to the power tool, and a wireless charging device configured to cooperate with the wireless charging device to charge the cell units, wherein the battery pack is detachably coupled to the power tool to provide power to the power tool, the cell units are pouch cells, the wireless charging device includes a power output module configured to cooperate with the wireless charging device, and the wireless charging device is configured to provide power to the battery pack at a power greater than or equal to 15 W.

[0019] A battery pack for a power tool includes a battery pack housing formed with a coupling portion configured to connect with the power tool, cell units disposed within the battery pack housing, a power management board disposed within the battery pack housing, a battery pack interface configured to connect with the power tool to provide power to the power tool, and a wireless charging device configured to cooperate with a wireless charging device to charge the cell units, wherein the wireless charging device is connected to the power management board, and the battery pack interface is further configured to be detachably connected with a charger to allow the charger to charge the cell units.

[0020] In some embodiments, the battery pack interface is configured to provide power to the power tool at a power greater than or equal to 30 W, and the wireless charging device is configured to provide power to the battery pack at a power greater than 15 W.

[0021] In some embodiments, the cell units are pouch cells.

[0022] In some embodiments, the cell units are cylindrical cells.

[0023] A charging assembly includes a battery pack, a first charging device, and a second charging device, the battery pack including a battery pack housing, cell units disposed within the battery pack housing, a battery pack interface configured to connect with a power tool to provide power to the power tool, and a wireless charging device configured to access power to charge the cell units, the first charging device including a power output module configured to cooperate with the wireless charging device, the second charging device including a second charging interface configured to detachably connect with the battery pack interface, and the battery pack interface including a positive terminal and a negative terminal.

[0024] A battery pack for a power tool, comprising: a battery pack housing formed with a joint for connecting with the power tool; a cell unit disposed in the battery pack housing; a power management board disposed in the battery pack housing; a battery pack interface for connecting with the power tool to provide power to the power tool; a wireless charging device configured to cooperate with a wireless charging apparatus to charge the cell unit; a USB charging interface configured to connect with a charger to charge the cell unit; wherein the wireless charging device is connected with the power management board.

[0025] In some embodiments, the USB interface is further configured to output power from the battery pack to other power consuming devices.

[0026] In some embodiments, the cell unit is a pouch cell.

[0027] In some embodiments, the cell unit is a cylindrical cell.

[0028] A charging combination, comprising: a first battery pack configured to power a power tool, the first battery pack comprising a first cell unit and a first wireless charging device configured to charge the first cell unit; a second battery pack configured to power the power tool, the second battery pack comprising a second cell unit and a second wireless charging device configured to charge the second cell unit; and a wireless charging apparatus configured to charge the first battery pack and the second battery pack simultaneously or in a predetermined sequence.

[0029] In some embodiments, the first cell unit is a pouch cell and the second cell unit is a pouch cell.

[0030] In some embodiments, the first cell unit is a pouch cell and the second cell unit is a cylindrical cell.

[0031] In some embodiments, the first cell unit is a cylindrical cell and the second cell unit is a cylindrical cell.

[0032] A power tool, comprising: a tool main body comprising an output member for outputting power, a motor for driving the output member to move, and a main body housing accommodating at least part of the motor; and a battery pack configured to be detachably connected to the main body housing to power the motor; wherein the tool main body comprises a main body interface, and the battery pack comprises a battery pack interface configured to cooperate with the main body interface, the main body interface and the battery pack interface being connected when the battery pack is mounted to the tool main body, the battery pack further comprising: a battery pack housing; and a cell unit disposed in the battery pack housing and electrically connected with the battery pack interface, the cell unit being a pouch cell, and a nominal voltage of the battery pack being greater than or equal to 3V and less than or equal to 9V.

[0033] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V and less than or equal to 9V.

[0034] In some embodiments, the number of the cell units is less than or equal to 4.

[0035] In some embodiments, the battery pack housing is configured to accommodate a plurality of cell units, and the plurality of cell units are stacked.

[0036] In some embodiments, the host housing includes a holding portion, and when the battery pack is coupled to the tool host, a portion of the battery pack housing is located in the holding portion.

[0037] In some embodiments, the host housing includes a holding portion, and when the battery pack is coupled to the tool host, a portion of the cell units is located in the holding portion.

[0038] In some embodiments, the nominal voltage of the battery pack is less than or equal to 13V.

[0039] A charging assembly includes a charger and a battery pack, the charger being configured to charge the battery pack; the charger includes a charger housing formed with a charging coupling portion for detachably coupling the battery pack; a charging interface for electrically connecting with the battery pack to transmit power to the battery pack to charge the battery pack; the battery pack includes a battery pack housing; cell units disposed in the battery pack housing; a battery pack interface for connecting with the charging interface when the battery pack is coupled to the charger; wherein the battery pack interface is electrically connected with the cell units, the cell units are pouch cells, and the nominal voltage of the battery pack is less than or equal to 9V.

[0040] A battery pack for an electric power tool includes a battery pack housing; cell units disposed in the battery pack housing; a battery pack interface for outputting power to the electric power tool, the battery pack interface being electrically connected with the cell units; wherein the battery pack is configured to be detachably coupled to the electric power tool, the number of the cell units is less than or equal to 4, the cell units are pouch cells, and the nominal voltage of the battery pack is less than or equal to 9V.

[0041] In some embodiments, the battery pack interface includes a positive terminal, a negative terminal, and a terminal circuit board, the positive terminal and the negative terminal are mounted to the terminal circuit board, the positive terminal and the negative terminal are connected with the cell units, at least a portion of the plurality of cell units are stacked in a stacking direction, and the terminal circuit board is disposed at an end portion of the plurality of cell units stacked in the stacking direction.

[0042] An electric power tool includes a tool host including an output member for outputting power, a motor for driving the output member to move, and a host housing for accommodating at least a portion of the motor; a battery pack for supplying power to the motor; wherein the battery pack further includes at least one cell unit configured to store electrical energy; the cell unit is a pouch cell, and the nominal voltage of the battery pack is greater than or equal to 3V and less than or equal to 9V.

[0043] An electric tool, comprising: a tool main body, including an output member for outputting power, a motor for driving the output member to move, and a main body housing for accommodating at least part of the motor; a battery pack for detachably connecting to the main body housing to supply power to the motor; wherein, the tool main body includes a main body interface, the battery pack includes a battery pack interface that mates with the main body interface, when the battery pack is installed on the tool main body, the main body interface and the battery pack interface are connected, and the battery pack further includes: a battery pack housing; a battery cell unit disposed in the battery pack housing and electrically connected to the battery pack interface; the battery cell unit is a pouch-type battery cell, and the output power of the battery pack is greater than or equal to 140W and less than or equal to 750W.

[0044] In some embodiments, the nominal voltage of the battery pack is less than or equal to 9V.

[0045] In some embodiments, the number of battery cell units is less than or equal to 4, and at least part of the multiple battery cell units are stacked.

[0046] In some embodiments, the main body housing includes a gripping portion for the user to hold, and when the battery pack is combined with the tool main body, part of the battery pack housing is located within the gripping portion.

[0047] In some embodiments, the main body housing includes a gripping portion for the user to hold, and when the battery pack is combined with the tool main body, part of the battery cell units are located within the gripping portion.

[0048] In some embodiments, the main body housing includes a motor accommodating portion for accommodating the motor and a gripping portion for the user to hold, the extending direction of the motor accommodating portion intersects with the extending direction of the gripping portion, and the battery pack is combined with the gripping portion along the extending direction of the gripping portion.

[0049] In some embodiments, the electric tool is a screwdriver, an electric drill, an impact drill, a sander, or a cutter.

[0050] In some embodiments, the main body housing includes a motor accommodating portion for accommodating the motor and a gripping portion for the user to hold, the extending direction of the motor accommodating portion is substantially the same as the extending direction of the gripping portion, and the battery pack is combined with the gripping portion along the extending direction of the gripping portion.

[0051] In some embodiments, when the battery pack is combined with the tool main body, the electric tool is substantially in the shape of the Chinese character "one".

[0052] An electric power tool comprises: a tool main body comprising an output member for outputting power, a motor for driving the output member to move, and a main body housing for accommodating at least part of the motor; and a battery pack for detachably connecting to the main body housing to supply power to the motor; wherein the tool main body comprises a main body interface, and the battery pack comprises a battery pack interface for cooperating with the main body interface, the main body interface and the battery pack interface are connected when the battery pack is mounted to the tool main body, the battery pack further comprises: a battery pack housing; and at least one cell unit arranged to store electric energy in the battery pack housing and electrically connected with the battery pack interface; the main body housing comprises a motor accommodating portion for accommodating the motor and a holding portion for being held by a user, an extending direction of the motor accommodating portion is substantially the same as an extending direction of the holding portion, the battery pack is combined to the holding portion along the extending direction of the holding portion, the cell unit is a pouch cell, and an output power of the battery pack is greater than or equal to 140 W and less than or equal to 750 W.

[0053] An electric power tool comprises: a tool main body comprising an output member for outputting power, a motor for driving the output member to move, and a main body housing for accommodating at least part of the motor; and a battery pack for detachably connecting to the main body housing to supply power to the motor; wherein the tool main body comprises a main body interface, and the battery pack comprises a battery pack interface for cooperating with the main body interface, the main body interface and the battery pack interface are connected when the battery pack is mounted to the tool main body, the battery pack further comprises: a battery pack housing; and at least one cell unit arranged to store electric energy in the battery pack housing and electrically connected with the battery pack interface; the cell unit is a pouch cell, and a volumetric energy density of the battery pack is greater than or equal to 100 mWh / cm 3 , and a nominal voltage of the battery pack is less than or equal to 9 V.

[0054] In some embodiments, the volumetric energy density of the battery pack is greater than or equal to 120 mWh / cm 3 .

[0055] In some embodiments, a gravimetric energy density of the battery pack is greater than or equal to 100 mWh / g.

[0056] In some embodiments, the nominal voltage of the battery pack is 8 V.

[0057] In some embodiments, a number of the cell units in the battery pack housing is 2, and a weight of the battery pack is less than or equal to 200 g.

[0058] In some embodiments, a number of the cell units in the battery pack housing is 2, and a volume of the battery pack is less than or equal to 200 cm 3 .

[0059] In some embodiments, a capacity of the battery pack is greater than or equal to 1.5 Ah and less than or equal to 5 Ah.

[0060] In some embodiments, the number of the battery cell units in the battery pack housing is 4, wherein the 4 battery cell units form 2P battery cell groups.

[0061] In some embodiments, the host housing comprises a motor accommodating portion for accommodating the motor and a holding portion for being held by a user, and at least part of the battery cell units are located in the holding portion when the battery pack is combined to the tool host.

[0062] A battery pack suitable for electric power tools, comprising: a battery pack housing formed with a combination portion for connecting with an electric power tool; battery cell units arranged in the battery pack housing; a battery pack interface for outputting electric power to the electric power tool, the battery pack interface being electrically connected with the battery cell units; wherein the battery cell units are pouch-shaped battery cells, the volumetric energy density of the battery pack is greater than or equal to 100 mWh / cm 3 , and the nominal voltage of the battery pack is less than or equal to 9 V.

[0063] An electric power tool, comprising: a tool host comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack for being detachably connected to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface cooperating with the host interface, the host interface and the battery pack interface are connected when the battery pack is mounted to the tool host, and the battery pack further comprises: a battery pack housing; battery cell units arranged in the battery pack housing and electrically connected with the battery pack interface; the battery cell units are pouch-shaped battery cells, the gravimetric energy density of the battery pack is greater than or equal to 100 mWh / g, and the nominal voltage of the battery pack is less than or equal to 9 V.

[0064] An electric power tool, comprising: a tool host comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack for being detachably connected to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface cooperating with the host interface, the host interface and the battery pack interface are connected when the battery pack is mounted to the tool host, and the battery pack further comprises: a battery pack housing; battery cell units arranged in the battery pack housing and electrically connected with the battery pack interface; the ratio of the output power of the battery pack to the volume of the battery pack is greater than or equal to 1 W / cm³, and the volume of the battery pack is less than or equal to 150 cm³.

[0065] In some embodiments, the number of the battery cell units in the battery pack housing is 2, and the two battery cell units are connected in series.

[0066] In some embodiments, the output power of the battery pack is greater than or equal to 140 W and less than or equal to 750 W.

[0067] In some embodiments, the gravimetric energy density of the battery pack is greater than or equal to 100 mWh / g.

[0068] In some embodiments, the number of the electric cell units in the battery pack housing is 2, and the weight of the battery pack is less than or equal to 180g.

[0069] In some embodiments, the capacity of the battery pack is greater than or equal to 1.5Ah and less than or equal to 5Ah.

[0070] In some embodiments, the power tool is a hand-held power tool, the main machine housing includes a holding portion for a user to hold, and the battery pack is combined to the holding portion.

[0071] A battery pack suitable for a power tool, comprising: a battery pack housing; electric cell units arranged in the battery pack housing; a battery pack interface for outputting electric power to the power tool, the battery pack interface being electrically connected with the electric cell units; wherein the battery pack is arranged to be detachably combined to the power tool, the volumetric energy density of the battery pack is greater than or equal to 100mWh / cm 3 , and the volume of the battery pack is less than or equal to 250cm 3 .

[0072] A power tool, comprising: a tool main machine including an output member for outputting power, an electric machine for driving the output member to move, and a main machine housing accommodating at least part of the electric machine; a battery pack for detachably connecting to the main machine housing to supply power to the electric machine; wherein the tool main machine includes a main machine interface, the battery pack includes a battery pack interface matched with the main machine interface, the main machine interface and the battery pack interface are connected when the battery pack is mounted to the tool main machine, and the battery pack further includes: a battery pack housing; electric cell units arranged in the battery pack housing and electrically connected with the battery pack interface; the ratio of the output power of the battery pack to the volume of the battery pack is greater than or equal to 1W / cm 3 , and the volume of the battery pack is less than or equal to 150cm 3 .

[0073] A power tool, comprising: a tool main machine including an output member for outputting power, an electric machine for driving the output member to move, and a main machine housing accommodating at least part of the electric machine; a battery pack for detachably connecting to the main machine housing to supply power to the electric machine; wherein the tool main machine includes a main machine interface, the battery pack includes a battery pack interface matched with the main machine interface, the main machine interface and the battery pack interface are connected when the battery pack is mounted to the tool main machine, and the battery pack further includes: a battery pack housing; electric cell units arranged in the battery pack housing and electrically connected with the battery pack interface; the electric cell units are pouch cells, the ratio of the output power of the battery pack to the weight of the battery pack is greater than or equal to 1W / g, and the weight of the battery pack is less than or equal to 180g.

[0074] An electric power tool, comprising: a tool main body comprising an output member for outputting power, a motor for driving the output member to move, and a main body housing for accommodating at least part of the motor; a battery pack for detachably connecting to the main body housing to supply power to the motor; wherein the tool main body comprises a main body interface, and the battery pack comprises a battery pack interface cooperating with the main body interface, the main body interface and the battery pack interface are connected when the battery pack is mounted to the tool main body, the battery pack further comprises: a battery pack housing; a cell unit arranged in the battery pack housing and electrically connected with the battery pack interface; the main body housing comprises: a motor housing portion for accommodating at least part of the motor; a holding portion for a user to hold; wherein the cell unit is a pouch cell, at least part of the cell unit is located in the holding portion when the battery pack is combined to the tool main body, the battery pack is combined to the holding portion along a first straight line direction, the length of the outer contour of the section of the part of the battery pack located in the holding portion in a plane perpendicular to the first straight line is greater than or equal to 10 cm and less than or equal to 14 cm, and the ratio of the output power of the battery pack to the volume of the battery pack is greater than or equal to 1 W / cm3.

[0075] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7 V.

[0076] In some embodiments, the number of cell units in the battery pack housing is greater than or equal to 2.

[0077] In some embodiments, the extension plane of the pouch cell is substantially parallel to the first straight line.

[0078] In some embodiments, the number of cell units in the battery pack housing is 2, the capacity of the battery pack is greater than or equal to 1.5 Ah and less than or equal to 5 Ah.

[0079] In some embodiments, the volumetric energy density of the battery pack is greater than or equal to 120 mWh / cm3. 3 .

[0080] In some embodiments, the length of the outer contour of the section of the holding portion in the plane perpendicular to the first straight line is greater than or equal to 12.5 cm and less than or equal to 16 cm.

[0081] In some embodiments, the gravimetric energy density of the battery pack is greater than or equal to 110 mWh / g.

[0082] An electric power tool comprises: a tool main body comprising an output member for outputting power, a motor for driving the output member to move, and a main body housing for accommodating at least part of the motor; and a battery pack for detachably connecting to the main body housing to supply power to the motor; wherein the tool main body comprises a main body interface, and the battery pack comprises a battery pack interface for cooperating with the main body interface, the main body interface and the battery pack interface are connected when the battery pack is mounted to the tool main body, and the battery pack further comprises: a battery pack housing; and a cell unit arranged in the battery pack housing and electrically connected to the battery pack interface; the main body housing comprises: a motor housing portion for accommodating at least part of the motor; and a holding portion for being held by a user; wherein the cell unit is a pouch cell, at least part of the cell unit is located in the holding portion when the battery pack is combined to the tool main body, the battery pack is combined to the holding portion along a first straight line direction, and a perimeter of an outer contour of a cross section of the part of the battery pack located in the holding portion in a plane perpendicular to the first straight line is greater than or equal to 10 cm and less than or equal to 14 cm, and a volumetric energy density of the battery pack is greater than or equal to 100 mWh / cm 3 .

[0083] An electric power tool comprises: a tool main body comprising an output member for outputting power, a motor for driving the output member to move, and a main body housing for accommodating at least part of the motor; and a battery pack for detachably connecting to the main body housing to supply power to the motor; wherein the tool main body comprises a main body interface, and the battery pack comprises a battery pack interface for cooperating with the main body interface, the main body interface and the battery pack interface are connected when the battery pack is mounted to the tool main body, and the battery pack further comprises: a battery pack housing; and a cell unit arranged in the battery pack housing and electrically connected to the battery pack interface; the main body housing comprises: a motor housing portion for accommodating at least part of the motor; and a holding portion for being held by a user; wherein at least part of the cell unit is located in the holding portion when the battery pack is combined to the tool main body, the battery pack is combined to the holding portion along a first straight line direction, a perimeter of an outer contour of a cross section of the part of the battery pack located in the holding portion in a plane perpendicular to the first straight line is greater than or equal to 10 cm and less than or equal to 14 cm, and a gravimetric energy density of the battery pack is greater than or equal to 100 mWh / g.

[0084] An electric power tool, comprising: a tool main body comprising an output member for outputting power, an electric motor for driving the output member to move, and a main body housing for accommodating at least part of the electric motor; a battery pack for detachably connecting to the main body housing to supply power to the electric motor; wherein the tool main body comprises a main body interface, and the battery pack comprises a battery pack interface cooperating with the main body interface, the main body interface and the battery pack interface are connected when the battery pack is mounted to the tool main body, the battery pack further comprises: a battery pack housing; and a cell unit arranged in the battery pack housing and electrically connected with the battery pack interface; the main body housing comprises: an electric motor housing portion for accommodating at least part of the electric motor; and a holding portion for a user to hold; wherein the cell unit is a pouch cell, at least part of the cell unit is located in the holding portion when the battery pack is combined to the tool main body, the battery pack is combined to the holding portion along a first straight line direction, the area of a cross section of the part of the battery pack located in the holding portion in a plane perpendicular to the first straight line is greater than or equal to 8 cm² and less than or equal to 14 cm², and the ratio of the output power of the battery pack to the volume of the battery pack is greater than or equal to 1 W / cm³.

[0085] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7 V.

[0086] In some embodiments, the number of cell units in the battery pack housing is greater than or equal to 2.

[0087] In some embodiments, the extension plane of the pouch cell is substantially parallel to the first straight line.

[0088] In some embodiments, the number of cell units in the battery pack housing is 2, and the capacity of the battery pack is greater than or equal to 1.5 Ah and less than or equal to 5 Ah.

[0089] In some embodiments, the volumetric energy density of the battery pack is greater than or equal to 120 mWh / cm³. 3 .

[0090] In some embodiments, the area of the cross section of the holding portion in the plane perpendicular to the first straight line is greater than or equal to 13 cm² and less than or equal to 18 cm².

[0091] In some embodiments, the gravimetric energy density of the battery pack is greater than or equal to 110 mWh / g.

[0092] An electric power tool comprises: a tool main body comprising an output member for outputting power, a motor for driving the output member to move, and a main body housing for accommodating at least part of the motor; and a battery pack for detachably connecting to the main body housing to supply power to the motor; wherein the tool main body comprises a main body interface, and the battery pack comprises a battery pack interface for cooperating with the main body interface, the main body interface and the battery pack interface are connected when the battery pack is mounted to the tool main body, and the battery pack further comprises: a battery pack housing; and a cell unit arranged in the battery pack housing and electrically connected to the battery pack interface; the main body housing comprises: a motor housing portion for accommodating at least part of the motor; and a holding portion for being held by a user; wherein the cell unit is a pouch cell, at least part of the cell unit is located in the holding portion when the battery pack is combined to the tool main body, the battery pack is combined to the holding portion along a first straight line direction, and the area of a cross section of the part of the battery pack located in the holding portion in a plane perpendicular to the first straight line is greater than or equal to 8 cm2 and less than or equal to 14 cm2, and the volumetric energy density of the battery pack is greater than or equal to 100 mWh / cm3. 3 .

[0093] An electric power tool comprises: a tool main body comprising an output member for outputting power, a motor for driving the output member to move, and a main body housing for accommodating at least part of the motor; and a battery pack for detachably connecting to the main body housing to supply power to the motor; wherein the tool main body comprises a main body interface, and the battery pack comprises a battery pack interface for cooperating with the main body interface, the main body interface and the battery pack interface are connected when the battery pack is mounted to the tool main body, and the battery pack further comprises: a battery pack housing; and a cell unit arranged in the battery pack housing and electrically connected to the battery pack interface; the main body housing comprises: a motor housing portion for accommodating at least part of the motor; and a holding portion for being held by a user; wherein at least part of the cell unit is located in the holding portion when the battery pack is combined to the tool main body, the battery pack is combined to the holding portion along a first straight line direction, the area of a cross section of the part of the battery pack located in the holding portion in a plane perpendicular to the first straight line is greater than or equal to 8 cm2 and less than or equal to 14 cm2, and the gravimetric energy density of the battery pack is greater than or equal to 100 mWh / g.

[0094] An electric power tool, comprising: a tool main body comprising an output member for outputting power, an electric motor for driving the output member to move, and a main body housing accommodating at least part of the electric motor; a battery pack for detachably connecting to the main body housing to supply power to the electric motor; wherein the tool main body comprises a main body interface, and the battery pack comprises a battery pack interface cooperating with the main body interface, the main body interface and the battery pack interface being connected when the battery pack is mounted to the tool main body, the battery pack further comprising: a battery pack housing; a cell unit arranged in the battery pack housing and electrically connected with the battery pack interface; the main body housing comprising: an electric motor housing portion for accommodating at least part of the electric motor; a holding portion for a user to hold; wherein, when the battery pack is combined to the tool main body, at least part of the cell unit is located in the holding portion, the battery pack is combined to the holding portion along a first straight line direction, and the part of the battery pack located in the holding portion has an area of a cross section in a plane perpendicular to the first straight line greater than or equal to 8 cm² and less than or equal to 14 cm², and the cell unit is a pouch cell.

[0095] In some embodiments, the battery pack has a nominal voltage greater than or equal to 7 V.

[0096] In some embodiments, the number of cell units in the battery pack housing is greater than or equal to 2.

[0097] In some embodiments, the battery pack has a nominal voltage less than or equal to 9 V.

[0098] In some embodiments, the extension plane of the cell unit located in the holding portion is substantially parallel to the first straight line direction.

[0099] In some embodiments, the holding portion has an area of a cross section in a plane perpendicular to the first straight line greater than or equal to 13 cm² and less than or equal to 18 cm².

[0100] In some embodiments, the cross section has a dimension in a width direction perpendicular to the first straight line greater than or equal to 3.7 cm and less than or equal to 4.7 cm.

[0101] In some embodiments, the cross section has a dimension in a thickness direction perpendicular to the first straight line and perpendicular to the width direction greater than or equal to 2.7 cm and less than or equal to 3.7 cm.

[0102] In some embodiments, the number of cell units in the battery pack housing is 2, and the battery pack has an energy greater than or equal to 7 Wh and less than or equal to 9 Wh.

[0103] An electric power tool comprises: a tool main body comprising an output member for outputting power, a motor for driving the output member to move, and a main body housing for accommodating at least part of the motor; and a battery pack for detachably connecting to the main body housing to supply power to the motor; wherein the tool main body comprises a main body interface, and the battery pack comprises a battery pack interface matched with the main body interface, the main body interface and the battery pack interface are connected when the battery pack is mounted to the tool main body, and the battery pack further comprises: a battery pack housing; and a battery cell unit arranged in the battery pack housing and electrically connected with the battery pack interface; the main body housing comprises: a motor housing portion for accommodating at least part of the motor; and a holding portion for a user to hold; wherein, when the battery pack is combined to the tool main body, at least part of the battery cell unit is located in the holding portion, the battery pack is combined to the holding portion along a first straight line direction, and a width of a cross section of the part of the battery pack located in the holding portion in a plane perpendicular to the first straight line is greater than or equal to 3.7 cm and less than or equal to 4.7 cm, and a thickness of the cross section is greater than or equal to 2.7 cm and less than or equal to 3.7 cm, and the battery cell unit is a pouch cell.

[0104] An electric power tool comprises: a tool main body comprising an output member for outputting power, a motor for driving the output member to move, and a main body housing for accommodating at least part of the motor; and a battery pack for supplying power to the motor; wherein the battery pack further comprises: at least one battery cell unit arranged to store energy; and the main body housing comprises: a motor housing portion for accommodating at least part of the motor; and a holding portion for a user to hold; wherein, at least part of the battery cell unit is located in the holding portion, the holding portion extends along a first straight line direction, an extension plane of the battery cell unit is parallel to the first straight line, and an area of a cross section of the holding portion in a plane perpendicular to the first straight line is greater than or equal to 13 cm² and less than or equal to 18 cm², and the battery cell unit is a pouch cell.

[0105] An electric power tool comprises: a tool main body comprising an output member for outputting power, a motor for driving the output member to move, and a main body housing for accommodating at least part of the motor; and a battery pack for detachably connecting to the main body housing to supply power to the motor; wherein the tool main body comprises a main body interface, and the battery pack comprises a battery pack interface matched with the main body interface, the main body interface and the battery pack interface are connected when the battery pack is mounted to the tool main body, and the battery pack further comprises: a battery pack housing; and a battery cell unit arranged in the battery pack housing and electrically connected with the battery pack interface; the main body housing comprises: a motor housing portion for accommodating at least part of the motor; and a holding portion for a user to hold; wherein, when the battery pack is combined to the tool main body, at least part of the battery cell unit is located in the holding portion, the battery pack is combined to the holding portion along a first straight line direction, and a perimeter of an outer contour of a cross section of the part of the battery pack located in the holding portion in a plane perpendicular to the first straight line is greater than or equal to 10 cm and less than or equal to 14 cm, and the battery cell unit is a pouch cell.

[0106] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V.

[0107] In some embodiments, the number of the cell units inside the battery pack housing is greater than or equal to 2.

[0108] In some embodiments, the nominal voltage of the battery pack is less than or equal to 9V.

[0109] In some embodiments, the extension plane of the cell units inside the holding portion is substantially parallel to the first straight line direction.

[0110] In some embodiments, the perimeter of the outer contour of the cross section of the holding portion in a plane perpendicular to the first straight line is greater than or equal to 12.5cm and less than or equal to 16cm.

[0111] In some embodiments, the dimension of the cross section in a width direction perpendicular to the first straight line is greater than or equal to 3.7cm and less than or equal to 4.7cm.

[0112] In some embodiments, the dimension of the cross section in a thickness direction perpendicular to the first straight line and perpendicular to the width direction is greater than or equal to 2.7cm and less than or equal to 3.7cm.

[0113] In some embodiments, the number of the cell units inside the battery pack housing is 2, and the energy of the battery pack is greater than or equal to 7Wh and less than or equal to 9Wh.

[0114] In some embodiments, the cell units include a first group of cell units and a second group of cell units, the first group of cell units is at least partially disposed inside the holding portion when the battery pack is coupled to the tool host, and the second group of cell units is outside the holding portion.

[0115] An electric power tool, comprising: a tool host including an output member for outputting power, an electric motor for driving the output member to move, and a host housing for accommodating at least part of the electric motor; and a battery pack for detachably connecting to the host housing to supply power to the electric motor; wherein the tool host includes a host interface, and the battery pack includes a battery pack interface for mating with the host interface, the host interface and the battery pack interface are connected when the battery pack is mounted to the tool host, and the battery pack further includes: a battery pack housing; and cell units disposed inside the battery pack housing and electrically connected to the battery pack interface; the host housing includes: an electric motor housing portion for accommodating at least part of the electric motor; and a holding portion for a user to hold and substantially extend along a first straight line direction; the cell units are pouch cells, at least part of the cell units are inside the holding portion when the battery pack is coupled to the tool host, and the extension plane of the cell units at least partially inside the holding portion is substantially parallel to the first straight line. In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V and less than or equal to 9V.

[0116] In some embodiments, the battery pack further comprises a power management board, a plane of extension of the power management board is substantially parallel to a plane of extension of the at least one battery cell unit located at least partially within the holding portion.

[0117] In some embodiments, the battery pack further comprises a power management board, the power management board is stacked to a side of the at least one battery cell unit located at least partially within the holding portion.

[0118] In some embodiments, the at least one battery cell unit located at least partially within the holding portion is defined as a first group of battery cell units, the first group of battery cell units comprises a first end proximate to the host interface and a second end opposite to the first end along a first linear direction, the battery pack interface is disposed at the first end.

[0119] In some embodiments, the battery pack interface comprises at least one battery pack terminal, the battery pack further comprises a terminal circuit board for mounting the battery pack terminal, the terminal circuit board is disposed at the first end.

[0120] In some embodiments, the terminal circuit board extends substantially perpendicular to the first linear direction.

[0121] In some embodiments, the number of the at least one battery cell unit located at least partially within the holding portion is two.

[0122] In some embodiments, the at least one battery cell unit located at least partially within the holding portion is defined as a first group of battery cell units, the battery pack further comprises a second battery cell unit located outside the holding portion when the battery pack is coupled to the tool host, the second battery cell unit is a pouch cell, a plane of extension of the second battery cell unit is substantially perpendicular to a plane of extension of the battery cell unit.

[0123] In some embodiments, the at least one battery cell unit located at least partially within the holding portion is defined as a first group of battery cell units, the battery pack further comprises a plurality of second battery cell units located outside the holding portion when the battery pack is coupled to the tool host, the plurality of second battery cell units are pouch cells, the battery cell units in the first group of battery cell units are connected in series with each other, the plurality of second battery cell units are connected in series with each other.

[0124] An electric power tool, comprising: a tool host comprising an output for outputting power, a motor for driving the output to move, and a host housing for accommodating at least part of the motor; a battery pack for supplying power to the motor; wherein the battery pack further comprises: at least one battery cell unit configured to store energy; the host housing comprises: a motor housing portion for accommodating at least part of the motor; a holding portion for a user to hold and extending substantially along a first linear direction; the battery cell unit is a pouch cell, at least part of the battery cell unit is located within the holding portion, a plane of extension of the at least one battery cell unit located at least partially within the holding portion is substantially parallel to the first linear direction.

[0125] A battery pack for power tools, comprising: a battery pack housing formed with a joint for connecting with a power tool; a cell unit arranged in the battery pack housing, the cell unit being a pouch cell, the cell unit extending substantially along a first plane; a battery pack interface for outputting power to the power tool, the battery pack interface being electrically connected with the cell unit; a power management board, a plane of extension of the power management board being substantially parallel to the first plane so that the power management board is arranged at a side of the cell unit; wherein the joint is arranged so that the battery pack is detachably connected to the power tool, the battery pack interface comprising: at least one battery pack terminal, the at least one battery pack terminal being located at an end of the cell unit.

[0126] In some embodiments, the battery pack is arranged to be connected to the power tool along a first linear direction, the first linear direction being substantially parallel to the first plane.

[0127] In some embodiments, the cell unit is substantially rectangular, the at least one battery pack terminal being located at an end of a long side of the rectangular.

[0128] In some embodiments, the cell unit is substantially rectangular, a length of the cell unit being greater than or equal to 5.7 cm and less than or equal to 6.7 cm, and a width of the cell unit being greater than or equal to 2.7 cm and less than or equal to 3.7 cm.

[0129] In some embodiments, the battery pack has a nominal voltage greater than or equal to 7 V and less than or equal to 9 V.

[0130] In some embodiments, the battery pack further comprises a terminal circuit board for mounting the at least one battery pack terminal, the terminal circuit board being arranged at the end of the cell unit.

[0131] In some embodiments, the terminal circuit board is arranged separately from the power management board.

[0132] A battery pack for power tools, comprising: a battery pack housing formed with a joint for connecting with a power tool; a cell unit arranged in the battery pack housing, the cell unit being a pouch cell, the cell unit extending substantially along a first plane; a battery pack interface for outputting power to the power tool, the battery pack interface being electrically connected with the cell unit, the battery pack interface comprising at least one battery pack terminal; a power management board, a plane of extension of the power management board being substantially parallel to the first plane so that the power management board is arranged at a side of the cell unit; a terminal circuit board for supporting the battery pack terminal; wherein the joint is arranged so that the battery pack is detachably connected to the power tool, the terminal circuit board being arranged separately from the power management board, and a plane of extension of the terminal circuit board being non-parallel to the plane of extension of the power management board.

[0133] In some embodiments, the battery pack has a nominal voltage greater than or equal to 7 V and less than or equal to 9 V.

[0134] In some embodiments, the extension plane of the terminal circuit board is perpendicular to the extension plane of the power management board.

[0135] In some embodiments, the cell unit is substantially rectangular, the length of the cell unit is greater than or equal to 5.7 cm and less than or equal to 6.7 cm, and the width of the cell unit is greater than or equal to 2.7 cm and less than or equal to 3.7 cm.

[0136] In some embodiments, the number of cell units arranged in parallel with the power management board is 2.

[0137] A battery pack suitable for a power tool, comprising: a battery pack housing formed with a joint for connecting with the power tool; a cell unit arranged in the battery pack housing, the cell unit being a pouch cell, the cell unit extending substantially along a first plane; a battery pack interface for outputting power to the power tool, the battery pack interface being electrically connected with the cell unit, the battery pack interface comprising at least one battery pack terminal; a power management board, the extension plane of the power management board being substantially parallel to the first plane so that the power management board is arranged on the side of the cell unit; a component mounted to the side of the power management board away from the cell unit, the volume of the component being greater than or equal to 100 mm 3 , the component being arranged on the central axis of the length direction or the width direction of the power management board.

[0138] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7 V and less than or equal to 9 V.

[0139] In some embodiments, the number of cell units arranged in parallel with the power management board in the battery pack housing is less than or equal to 2.

[0140] A charging combination, comprising a first charger and a battery pack, the first charger being arranged to charge the battery pack; the battery pack comprising: a battery pack housing; a cell unit arranged in the battery pack housing; a first interface arranged to connect with the first charger to introduce power; wherein the first charger comprises a first charging interface detachably connected with the first interface, the cell unit being a pouch cell, and the first interface being a Type-C interface.

[0141] In some embodiments, the battery pack further comprises a battery pack interface for connecting with the power tool so that the battery pack supplies power to the power tool, the battery pack interface comprising a battery pack terminal.

[0142] In some embodiments, the charging combination further comprises: a second charger, the second charger comprising a second charging interface connected with the battery pack interface to charge the battery pack.

[0143] In some embodiments, the charging combination further comprises: a controller arranged to prevent access to power through the battery pack interface when the first charger is connected with the battery pack.

[0144] In some embodiments, the charging combination further comprises a controller configured to prevent access to power through the first interface when the second charger is connected to the battery pack.

[0145] In some embodiments, the second charger charges the cell units through the battery pack interface with a charging power greater than or equal to 30W.

[0146] In some embodiments, the first charger charges the cell units through the first interface with a charging power less than or equal to 15W.

[0147] In some embodiments, the first charger charges the cell units through the first interface with a charging power greater than or equal to 15W.

[0148] In some embodiments, the first charger charges the cell units through the first interface with a charging power greater than or equal to 18W.

[0149] In some embodiments, the battery pack has a nominal voltage greater than or equal to 7V and less than or equal to 9V.

[0150] The present application has the advantage that the cell units of the battery pack in the charging combination are pouch cells, so that the energy density of the battery pack is higher, the endurance time of the battery pack is improved, and the volume of the battery pack is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0151] Figure 1 is a plan view of an electric tool system according to an embodiment of the present application;

[0152] Figure 2 is a plan view of an electric drill in Figure 1 ;

[0153] Figure 3 is a plan view of the tool main body and the battery pack of the electric drill in Figure 2 separated;

[0154] Figure 4 is a perspective view of a part of the holding portion of the electric drill in Figure 2 ;

[0155] Figure 5 is a perspective view of the battery pack in Figure 1 ;

[0156] Figure 6a is a plan view of the battery pack in Figure 5 ;

[0157] Figure 6b is a cross-sectional view of the battery pack in Figure 6a along line A-A;

[0158] Figure 6c isFigure 6a Cross-sectional view of the battery pack along line BB;

[0159] Figure 7a yes Figure 5 Side view of the battery pack in the middle;

[0160] Figure 7b yes Figure 7a Cross-sectional view of the battery pack along the CC line;

[0161] Figure 8 yes Figure 5 Exploded view of the battery pack in the image;

[0162] Figure 9 yes Figure 8 A three-dimensional view of the structure shown from another perspective;

[0163] Figure 10 yes Figure 8 A plan view of the battery cell unit, battery cell bracket, and circuit board assembly;

[0164] Figure 11a yes Figure 10 The diagram shows a three-dimensional view of the structure when the circuit board assembly is separated from the cell support.

[0165] Figure 11b yes Figure 11a A three-dimensional view of the structure shown from another perspective;

[0166] Figure 12a yes Figure 10 Exploded view of the structure shown;

[0167] Figure 12b yes Figure 12a A three-dimensional view of the structure shown from another perspective;

[0168] Figure 13 yes Figure 2 A cross-sectional view of the power tool in plane P;

[0169] Figure 14 A perspective view of a charging assembly according to this application;

[0170] Figure 15 This is a module diagram of the charging assembly shown in Figure 14;

[0171] Figure 16 Exploded view of a battery pack according to another embodiment of this application;

[0172] Figure 17 This is a 3D diagram of another charging combination;

[0173] Figure 18 yes Figure 16 A plan view of the battery pack in the middle;

[0174] Figure 19 is Figure 16 is a plan view of a battery pack and a fan in

[0175] Figure 20 is a plan view of a charging combination of another embodiment of the present application;

[0176] Figure 21 is a plan view of another power tool of the present application;

[0177] Figure 22 is a perspective view of a battery pack of another embodiment of the present application;

[0178] Figure 23 is a plan view of a battery pack in Figure 22 when the first housing part is separated;

[0179] Figure 24 is an exploded view of a battery pack in Figure 22

[0180] Figure 25 is a schematic view of a battery cell unit in the battery pack of Figure 22

[0181] Figure 26 is a schematic view of the arrangement of battery cell units in another battery pack of the present application. DETAILED DESCRIPTION

[0182] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0183] In the present application, the terms "comprise", "contain", "have" or any other variant thereof are intended to cover a non-exclusive inclusion, so that a process, method, article or apparatus that comprises a list of elements does not only include those elements, but also includes other elements not expressly listed or inherent to such process, method, article or apparatus. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.

[0184] In the present application, the term "and / or", is a description of the association relationship between the associated objects, which means that there can be three kinds of relationships. For example, A and / or B, can represent the following three cases: A exists alone, A and B exist together, B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects are in a "and / or" relationship.

[0185] ​​In this application, the terms "connect," "couple," "coupled," "mount," and "mounting" can be direct or indirect, and can include mechanical, electrical, and / or magnetic connections or couplings. In addition, "connect" and "coupled" are not restricted to physical or mechanical connections or couplings, and can include electrical connections or couplings.

[0186] In this application, the term "about" is used to indicate that a value includes the inherent variation of error for the device, the method being employed to determine the value, or the variation that exists in the materials used. "About" as used herein can include a degree of error regarding a value of up to 1%, 5%, 10%, or up to 20% in some scenarios. When the term "substantially" is used, the term "substantially" is used to describe a value that is close to the stated value. For example, "substantially parallel" can mean that the two objects are parallel to each other within 1 degree, 5 degrees, 10 degrees, or up to 20 degrees in some scenarios. When the term "substantially" is used, the term "substantially" is used to describe a value that is close to the stated value. For example, "substantially parallel" can mean that the two objects are parallel to each other within 1 degree, 5 degrees, 10 degrees, or up to 20 degrees in some scenarios.

[0187] In this application, the term "about" is used to indicate that a value includes the inherent variation of error for the device, the method being employed to determine the value, or the variation that exists in the materials used. "About" as used herein can include a degree of error regarding a value of up to 1%, 5%, 10%, or up to 20% in some scenarios. When the term "substantially" is used, the term "substantially" is used to describe a value that is close to the stated value. For example, "substantially parallel" can mean that the two objects are parallel to each other within 1 degree, 5 degrees, 10 degrees, or up to 20 degrees in some scenarios. When the term "substantially" is used, the term "substantially" is used to describe a value that is close to the stated value. For example, "substantially parallel" can mean that the two objects are parallel to each other within 1 degree, 5 degrees, 10 degrees, or up to 20 degrees in some scenarios.

[0188] In this application, the terms "upper," "lower," "left," "right," "front," "back," and the like describe a relative position or location as shown by the figures, and are not meant to be limiting. In addition, it is to be understood that when an element is referred to as being "on" or "under" another element, it can be directly on or under the other element or intervening elements can be present. Also, it is to be understood that the terms "upper," "lower," "left," "right," "front," "back," and the like are used in relation to the orientation of the figures, and are not meant to be limiting. For example, "lower" can include "lower," "lower left," "lower right," "front lower," and "back lower."

[0189] In this application, the terms "controller," "processor," "central processing unit," "CPU," and "MCU" are used interchangeably. When using the unit "controller," "processor," "central processing unit," "CPU," or "MCU" to perform a specific function, unless otherwise stated, these functions may be performed by a single or multiple of the aforementioned units.

[0190] In this application, the terms "device," "module," or "unit" are used to describe devices that can be implemented in hardware or software to perform a specific function.

[0191] In this application, the terms “calculation,” “judgment,” “control,” “determine,” “identify,” etc., refer to the operation and process of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0192] like Figure 1 The battery pack 100 shown is used to power power tools. As an energy storage device, the battery pack 100 can transfer electricity to the power tools to power the electrical components within them. Figure 1 As shown, the power tools can be an electric drill 200a, a grinder 200b, a wrench 200c, or a cutter 200d. It is understood that in other embodiments, the power tools can also be torque output tools such as screwdrivers, impact drills, electric hammers, and ratchet wrenches. Power tools can also be grinding tools such as angle grinders, sanders, straight grinders, and polishers. Power tools can also be cutting tools such as circular saws, reciprocating saws, and jigsaws. In some embodiments, the battery pack 100 can also be detachably connected to devices such as electric fans and lights to power these devices; the battery pack 100 can power the motor 212 that drives the fan blades or the light-emitting element.

[0193] like Figure 2 and Figure 3 As shown, electric drill 200a is used as a specific example of a power tool in this embodiment. Hereinafter, power tool 200a will be used to refer to electric drill 200a.

[0194] The electric tool 200a comprises a tool main body 21, and the battery pack 100 is detachably connected to the tool main body 21 to provide electric energy for the tool main body 21. The tool main body 21 comprises an output member 211, a motor 212 and a main body shell 22. The output member 211 is used to realize the function of the electric tool 200a, and the output member 211 outputs power. The output member 211 can rotate or reciprocate. In the embodiment, for the electric drill 200a, the output member 211 can be connected to a drill bit to drive the drill bit to rotate. For other electric tools 200a, the output member 211 can also be a chuck, a blade, a saw blade, a saw strip, a sanding bottom plate, a grinding bottom plate, etc. The motor 212 is used to drive the output member 211 to rotate, and the motor 212 is arranged in the main body shell 22. A transmission assembly can also be arranged between the motor 212 and the output member 211.

[0195] The main body shell 22 is used to accommodate the motor 212. The main body shell 22 comprises an accommodation portion 221 used to accommodate the motor 212. The battery pack 100 can be detachably connected to the main body shell 22. When the battery pack 100 is connected to the main body shell 22, the battery pack 100 can be electrically connected with the motor 212 to supply electric energy for the motor 212. The tool main body 21 can also comprise a trigger 213 used to start the motor 212. When the trigger 213 is triggered by a user, the battery pack 100 outputs electric energy to the motor 212 to drive the motor 212 to operate.

[0196] As shown in Figure 4 , the main body shell 22 comprises a combination portion 222 and a main body interface 223. The combination portion 222 is used to detachably combine the battery pack 100 with the tool main body 21, and the main body interface 223 is used to electrically connect with the battery pack 100. Correspondingly, as shown in Figure 5 , the battery pack 100 comprises a matching portion 111 and a battery pack interface 12. The matching portion 111 matches with the combination portion 222 to guide the battery pack 100 to be combined with the main body shell 22 along the first straight line 101. The battery pack interface 12 matches with the main body interface 223 to electrically connect the battery pack 100 with the tool main body 21 when the battery pack 100 is combined with the main body shell 22.

[0197] As shown in Figure 4 and Figure 5 , the main body shell 22 is formed with a slot 224, and the battery pack 100 is inserted into the slot 224 along the first straight line 101. When the battery pack 100 is combined with the main body shell 22, a part of the battery pack 100 is located in the slot 224, so that the size of the whole electric tool 200a can be reduced, which is beneficial to the miniaturization development of the electric tool 200a. When the battery pack 100 is combined with the main body shell 22, another part of the battery pack 100 is located outside the main body shell 22, so that the user can conveniently install and detach the battery pack 100, and the user can also conveniently observe the battery pack 100.

[0198] As shown in Figures 5 to 9 The battery pack 100 includes a battery pack housing 11, a battery cell unit 13, a battery cell support 14, and a circuit board assembly 15. The battery pack housing 11 is configured to form a battery cell accommodating cavity 112 for accommodating the battery cell unit 13, the battery cell support 14, and the circuit board assembly 15. The battery cell unit 13 is configured to store electrical energy. For example, in the embodiment shown in Figures 5 to 9 The number of the battery cell unit 13 can be more than or equal to 2. It can be appreciated that the number of the battery cell unit 13 is not limited to this. The battery cell support 14 is configured to support the battery cell unit 13. It can be appreciated that in other embodiments, the battery cell support 14 can not be provided independently, and the battery cell support 14 can be formed by the battery pack housing 11, which constitutes the battery cell support 14 for supporting the battery cell unit 13. The circuit board assembly 15 is configured to control the charging process and the discharging process of the battery pack 100.

[0199] In the present embodiment, the battery cell unit 13 is provided in the battery pack housing 11, and the battery cell unit 13 is electrically connected to the battery pack interface 12 to supply power to the motor 212 through the battery pack interface 12. The battery cell unit 13 is a pouch cell. The pouch cell includes a packaging bag and an electrolyte provided in the packaging bag. The pouch cell is prone to deformation, and thus the shape of the pouch cell can be fixed to a certain extent by the battery cell support 14. The volumetric energy density of the pouch cell is greater than or equal to 0.4 Wh / cm³. In some embodiments, the volumetric energy density of the pouch cell is greater than or equal to 0.42 Wh / cm³. In some embodiments, the volumetric energy density of the pouch cell is greater than or equal to 0.44 Wh / cm³. In some embodiments, the volumetric energy density of the pouch cell is greater than or equal to 0.45 Wh / cm³. In some embodiments, the volumetric energy density of the pouch cell is greater than or equal to 0.46 Wh / cm³. In some embodiments, the volumetric energy density of the pouch cell is greater than or equal to 0.48 Wh / cm³. In some embodiments, the volumetric energy density of the pouch cell is greater than or equal to 0.5 Wh / cm³. In some embodiments, the volumetric energy density of the pouch cell is greater than or equal to 0.51 Wh / cm³. In some embodiments, the volumetric energy density of the pouch cell is greater than or equal to 0.52 Wh / cm³. In some embodiments, the volumetric energy density of the pouch cell is greater than or equal to 0.53 Wh / cm³.

[0200] In some embodiments, the nominal voltage of the battery pack 100 is greater than or equal to 3V and less than or equal to 9V. In some embodiments, the nominal voltage is usually referred to as the voltage specified by the manufacturer or seller on the label, package, user manual, instruction, advertisement, marketing or other supporting documents of the power tool 200a and the battery pack, so that the user knows which power tool 200a and battery pack can be operated together. Alternatively, the nominal voltage of the battery pack 100 can also be obtained by detection or calculation. The voltage of a single cell unit 13 is usually 3.6V to 4.2V. In the embodiment shown, the battery pack 100 includes two cell units 13, each cell unit 13 has a voltage of about 4V, and the two cell units 13 are connected in series, so the nominal voltage of the battery pack 100 can be considered to be 8V. It can be understood that the nominal voltage of the battery pack 100 is related to the number of cell units 13 connected in series in the battery pack 100. For example, when the number of cell units 13 in the battery pack 100 is 1, the nominal voltage of the battery pack 100 can be considered to be 3.6V to 4.2V, and can be considered to be 3.6V, 4V or 4.2V. Figures 5 to 9 In the embodiment shown, the battery pack 100 includes two cell units 13, each cell unit 13 has a voltage of about 4V, and the two cell units 13 are connected in series, so the nominal voltage of the battery pack 100 can be considered to be 8V. It can be understood that the nominal voltage of the battery pack 100 is related to the number of cell units 13 connected in series in the battery pack 100. For example, when the number of cell units 13 in the battery pack 100 is 1, the nominal voltage of the battery pack 100 can be considered to be 3.6V to 4.2V, and can be considered to be 3.6V, 4V or 4.2V.

[0201] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 3V and less than or equal to 17V. Similarly, when the number of cell units 13 connected in series in the battery pack 100 is 3, the nominal voltage of the battery pack 100 can be considered to be 10.8V to 12.6V, and can be 10.8V, 12V or 12.6V. Similarly, when the number of cell units 13 connected in series in the battery pack 100 is 4, the nominal voltage of the battery pack 100 can be considered to be 14.4V to 16.8V, and can be considered to be 14.4V, 16V or 16.8V.

[0202] In the embodiment, the nominal voltage of the battery pack 100 is greater than or equal to 7V and less than or equal to 9V. For example, in the embodiment, the number of cell units 13 is 2, and the two cell units 13 are connected in series, so the nominal voltage of the battery pack 100 can be considered to be 7.2V to 8.4V, and can be considered to be 7.2V, 8V or 8.4V.

[0203] In some other embodiments, the number of cell units 13 of the battery pack 100 is less than or equal to 4, and the 4 cell units 13 can be connected in series. Alternatively, the 4 cell units 13 can also form two cell groups, and the two cell groups are connected in parallel, and the two cell units 13 in each cell group are connected in series. When the 4 cell units form two cell groups, the nominal voltage of the battery pack 100 can also be considered to be 8V. In some embodiments, the nominal voltage of the battery pack 100 is less than or equal to 9V. In some embodiments, the nominal voltage of the battery pack 100 is greater than or equal to 7V.

[0204] In some embodiments, the nominal voltage of the battery pack 100 is less than or equal to 13V. For example, the battery pack 100 includes three battery cells 13 connected in series, and the nominal voltage of the battery pack 100 can be 10.8V, 12V or 12.6V. As shown in Figure 6b and 6c The plurality of battery cells 13 are stacked in the battery pack housing 11. Here, we can define a stacking direction 102 of the plurality of battery cells 13 as a direction perpendicular to the battery cells 13, i.e. the plurality of battery cells 13 are stacked in sequence along the stacking direction 102. In the present embodiment, the stacking direction 102 of the plurality of battery cells 13 is perpendicular to the first straight line 101 direction in which the battery pack 100 is coupled to the tool host 21.

[0205] In the present embodiment, the battery pack 100 is detachably coupled to the tool host 21. In fact, in other embodiments, it is understood that the battery pack can also be a battery pack built into the host housing, and the battery pack is used to power the motor. The battery pack includes at least one battery cell for storing electrical energy, and the battery cell is disposed in the holding portion with its extension plane parallel to the first straight line direction. All the technical solutions in the present application that are applicable to the battery pack built into the host housing can be applied to the power tool with the built-in battery pack. Details are not repeated.

[0206] As shown in Figure 3 and Figure 4 The power tool 200a is a handheld power tool 200a, and the host housing 22 further includes a holding portion 225 for a user to hold. The holding portion 225 is connected to the receiving portion 221 and extends from the receiving portion 221 along the first straight line 101 direction. The extension direction of the holding portion 225 intersects with the extension direction of the receiving portion 221. The battery pack 100 is coupled to the holding portion 225 along the extension direction of the holding portion 225. One end of the holding portion 225 is connected to the receiving portion 221, and the other end forms the above-mentioned slot 224. The slot 224 is disposed in the holding portion 225 and is formed by the holding portion 225. Or, the slot wall forming the slot 224 constitutes a part of the holding portion 225. When the user holds the power tool 200a, the user's hand will hold the outer wall of the slot 224. When the battery pack 100 is coupled to the tool host 21, part of the battery pack housing 11 and part of the battery cells 13 are disposed in the slot 224 formed by the holding portion 225. In this way, part of the battery pack 100 is located in the holding portion 225. When the user operates the power tool 200a, the battery pack 100 will be partially located in the holding space surrounded by the user's palm and fingers.

[0207] It is understood that, as shown in Figure 1 the power tool is Figure 1When using the ratchet wrench 200c or the cutting machine 200d, the extending direction of the accommodating part is basically the same as that of the holding part, and the main body housing of the power tool is basically in the shape of the Chinese character "one". The battery pack 100 is coupled to the holding part along the extending direction of the holding part. In this embodiment, the battery pack 100 is also basically in the shape of the Chinese character "one". Thus, when the battery pack 100 is coupled to the holding part, a part of the battery pack 100 is located within the holding part, which can make the overall size of the power tool smaller, and the overall power tool is also basically in the shape of the Chinese character "one".

[0208] In this embodiment, the battery cell unit 13 is a pouch-type battery cell, and the nominal voltage of the battery pack 100 is less than or equal to 9V. This makes the volume of the battery pack 100 smaller, so that when a part of the battery pack 100 is disposed within the holding part 225, the holding part 225 is still relatively thin, facilitating the user to operate the power tool 200a. Moreover, when a part of the battery pack 100 is disposed within the holding part 225, the space within the holding part 225 can be fully utilized, thereby reducing the size of the overall power tool 200a, which is beneficial to the miniaturization of the power tool 200a.

[0209] In some embodiments, the nominal voltage of the battery pack can also be less than or equal to 17V.

[0210] In this embodiment, the output power of the battery pack 100 is greater than or equal to 140W and less than or equal to 750W. The output power is calculated based on the rated current of the battery pack 100 and the nominal voltage of the battery pack 100. The rated current of the battery pack 100 can be the average working current of the power tool 200a. Similarly, it can be understood that the output power of the battery pack 100 can also be regarded as the working power of the power tool 200a. For the power tool 200a, the average working current is usually within a certain range, and the corresponding working power can also vary within a certain range. For example, in this embodiment, the power tool 200a is a drill 200a, the average current of the drill 200a is 21A to 48A, and the nominal voltage of the battery pack 100 is 8V. Thus, the working power of the power tool 200a is 168W to 384W, and at this time, the output power of the battery pack 100 can be regarded as 168W to 384W.

[0211] Thus, with the nominal voltage of the battery pack 100 being 8V, the battery pack 100 can meet the requirements of power tools 200a with relatively high power, thereby improving the adaptability of the battery pack 100.

[0212] In some embodiments, the output power of the battery pack 100 is greater than or equal to 140W and less than or equal to 600W. In some embodiments, the output power of the battery pack 100 is greater than or equal to 150W and less than or equal to 550W.

[0213] In some embodiments, the volumetric energy density of the battery pack 100 is greater than or equal to 100 mWh / cm 3 and the nominal voltage is less than or equal to 9 V. In this way, for a low voltage battery pack 100, the battery pack 100 can be enabled to provide a smaller volume, greater energy to improve the energy of the battery pack 100, and thus the runtime of the battery pack 100, while meeting the needs of the low voltage platform of the power tool 200a. The volumetric energy density is the ratio of the energy to the volume of the battery pack 100. The volume of the battery pack 100 can refer to the amount of three-dimensional (3D) space occupied by the entire battery pack 100, expressed in cubic units (e.g., cubic centimeters (cm 3 ), or cubic millimeters (mm 3 )). The total volume of the battery pack 100 can be measured in different ways, including the volume of water displaced when the entire sealed battery pack 100 is submerged in water. Other ways of measuring the volume of the battery pack 100 can also be used by those skilled in the art.

[0214] In some embodiments, the volumetric energy density of the battery pack 100 is greater than or equal to 120 mWh / cm 3 . In some embodiments, the volumetric energy density of the battery pack 100 is greater than or equal to 130 mWh / cm 3

[0215] In some embodiments, the gravimetric energy density of the battery pack 100 can also be further defined as being greater than or equal to 100 mWh / g. The gravimetric energy density is the ratio of the energy to the weight of the battery pack 100. In this way, the entire weight of the battery pack 100 can be reduced while still providing sufficient runtime for the battery pack 100.

[0216] In some embodiments, the gravimetric energy density of the battery pack is greater than or equal to 110 mWh / g. In some embodiments, the gravimetric energy density of the battery pack is greater than or equal to 120 mWh / g.

[0217] In the present embodiment, the number of battery cell units 13 included in the battery pack 100 is 2, the volume of the battery pack 100 is less than or equal to 250 cm 3 . The weight of the battery pack 100 is less than or equal to 200 g. In some embodiments, the weight of the battery pack is less than or equal to 180 g. In some embodiments, the weight of the battery pack is less than or equal to 150 g. In some embodiments, the weight of the battery pack is less than or equal to 140 g. In some embodiments, the volume of the battery pack is less than or equal to 200 cm 3 . In some embodiments, the volume of the battery pack is less than or equal to 180 cm 3 . In some embodiments, the volume of the battery pack is less than or equal to 150 cm 3In some embodiments, the volume of the battery pack is less than or equal to 130 cm³. 3 .

[0218] In some embodiments, the capacity of the battery pack 100 is greater than or equal to 1.5 Ah and less than or equal to 5 Ah. The energy of the battery pack 100 is greater than or equal to 7 Wh and less than or equal to 9 Wh. Thus, the total capacity of the battery pack 100 is large, which can improve the battery pack 100's driving range.

[0219] In some embodiments, the ratio of the output power to the volume of the battery pack 100 is greater than or equal to 1 W / cm³. Here, the ratio of the output power to the volume of the battery pack 100 can be defined as the power density. In this embodiment, the cell unit 13 is a pouch-shaped cell, which increases the output power of the battery pack 100 while reducing its volume. This allows the power tool 200a to meet its operating power requirements while reducing the size of the battery pack 100 and increasing its runtime.

[0220] In some embodiments, the ratio of the output power of the battery pack 100 to the volume of the battery pack 100 is greater than or equal to 1.1 W / cm³.

[0221] like Figure 6b The image shows a cross-sectional view of the portion of the battery pack 100 located within the slot 224 of the grip portion 225 in a plane P perpendicular to the direction of the first straight line 101. Figure 6b As shown, the battery pack 100 has an outer contour 11a in its cross-section within a plane P perpendicular to the first straight line 101, and the outer contour 11a is visible. Figure 6b The lines are thickened in the middle. The perimeter of the outer contour 11a is greater than or equal to 10 cm and less than or equal to 14 cm. The perimeter of the outer contour 11a can be measured by the rope-wrapping method; the length of rope used to wrap around the outer contour 11a once can be defined as the perimeter of the outer contour 11a. It is understood that those skilled in the art can also use other common methods for measuring perimeter. Thus, for the handheld power tool 200a, the battery pack 100 is relatively thin, making it suitable for insertion into the grip 225 without increasing the size of the grip 225, thereby effectively utilizing the space within the grip 225. Especially for the power tool 200a with a small voltage platform, it is desirable for the power tool 200a to be sufficiently small in size while meeting the required working power. In some embodiments, the perimeter of the outer contour 11a is greater than or equal to 11 cm and less than or equal to 13.5 cm.

[0222] like Figure 6bAs shown, the area of ​​the outer contour 11a of the battery pack 100 in the plane perpendicular to the first straight line 101 is greater than or equal to 8 cm² and less than or equal to 14 cm². This makes the battery pack 100 smaller and easier for users to hold, while also ensuring that the battery pack 100 is not too small to facilitate the placement of internal components such as the battery cell unit 13 and circuit board assembly 15. The area can be measured using methods commonly used by those skilled in the art, such as the grid method. The grid method involves simulating the outer contour 11a, dividing it into several squares, calculating the area of ​​each square, and then summing the areas of several squares to approximate the area of ​​the outer contour 11a. Of course, those skilled in the art can also use other measurement methods, as long as they can approximate the area of ​​the outer contour 11a. In some embodiments, the area of ​​the outer contour of the battery pack in the plane perpendicular to the first straight line is greater than or equal to 10 cm² and less than or equal to 12.5 cm².

[0223] like Figure 13 The diagram shows a cross-sectional view of the grip portion 225 and the battery pack 100 located within the grip portion 225 in plane P. The thick inner line in the cross-sectional view represents the outer contour 11a of the battery pack 100, and the thick outer line represents the outer contour 225a of the grip portion 225. In this embodiment, because the outer contour 11a of the battery pack 100 in plane P is relatively small, the outer contour 225a of the grip portion 225 in plane P can be designed to be correspondingly smaller. For example, the perimeter of the outer contour 225a of the grip portion 225 in plane P perpendicular to the first straight line 101 is greater than or equal to 12.5 cm and less than or equal to 16 cm. The area of ​​the outer contour 225a of the grip portion 225 in plane P perpendicular to the first straight line 101 can also be greater than or equal to 13 cm² and less than or equal to 18 cm². This not only prevents the grip portion 225 from being too thin, reducing the gripping contact area, but also prevents the grip portion 225 from being too thick, which would make it uncomfortable to hold. In some embodiments, the perimeter of the outer contour 225a of the cross-section of the gripping portion 225 in the plane P perpendicular to the first straight line 101 is greater than or equal to 13 cm and less than or equal to 15 cm. In some embodiments, the area of ​​the outer contour 225a of the cross-section of the gripping portion 225 in the plane P perpendicular to the first straight line 101 is greater than or equal to 14 cm² and less than or equal to 16.5 cm².

[0224] like Figure 6bAs shown, the cross-section of the battery pack 100 in plane P has a width dimension L1 that is greater than or equal to 3.7 cm and less than or equal to 4.7 cm in the width direction perpendicular to the first straight line 101. This allows the width of the grip portion 225 to be suitable for a comfortable and stable grip by the user. The cross-section of the battery pack 100 in plane P has a thickness dimension L2 that is greater than or equal to 2.7 cm and less than or equal to 3.7 cm in the thickness direction perpendicular to the first straight line 101 and the width direction. The width dimension of the cross-section is also greater than the thickness dimension; for example, the ratio of the width dimension L1 to the thickness dimension L2 is greater than or equal to 1.1 and less than or equal to 1.5. In some embodiments, the ratio of the width dimension L1 to the thickness dimension L2 is greater than or equal to 1.2 and less than or equal to 1.5. This allows the cross-section of the battery pack 100 to be substantially elliptical, facilitating the design of the grip portion 225, which houses the battery pack 100, to also be approximately elliptical. In some embodiments, the cross-section of the battery pack 100 in plane P has a dimension L1 in the width direction perpendicular to the first straight line 101 that is greater than or equal to 3.9 cm and less than or equal to 4.5 cm, and the cross-section of the battery pack 100 in plane P has a dimension L2 in the thickness direction perpendicular to the first straight line 101 and perpendicular to the width direction that is greater than or equal to 2.9 cm and less than or equal to 3.5 cm.

[0225] like Figure 13 As shown, the dimension L3 of the cross-section of the grip portion 225 in plane P, in the width direction perpendicular to the first straight line 101, is greater than or equal to 4.5 cm and less than or equal to 5.3 cm. This allows the width of the grip portion 225 to be suitable for a comfortable and stable grip by the user. The dimension L4 of the cross-section of the grip portion 225 in plane P, in the thickness direction perpendicular to the first straight line 101 and perpendicular to the width direction, is greater than or equal to 3.5 cm and less than or equal to 4.5 cm. The dimension of the cross-section in the width direction is also greater than the dimension in the thickness direction; for example, the ratio of the dimension L1 in the width direction to the dimension L2 in the thickness direction is greater than or equal to 1.1 and less than or equal to 1.5. In some embodiments, the ratio of the dimension L1 in the width direction to the dimension L2 in the thickness direction is greater than or equal to 1.2 and less than or equal to 1.5. This allows the cross-section of the grip portion 225 to be substantially elliptical, enabling comfortable operation of the power tool 200a by the user, thus addressing the ergonomic considerations of the power tool 200a.

[0226] like Figures 4 to 7bAs shown, the cell unit 13 is a pouch-shaped cell that extends within the extension plane P2. Alternatively, it can be understood that the plane containing the largest surface area of ​​the pouch-shaped cell is the extension plane P2. The extension plane of the cell unit 13 is substantially parallel to the first straight line 101. The extension direction of the grip portion 225 is the first straight line 101, and the grip portion 225 has the largest dimension in the direction of the first straight line 101. Since the plane containing the largest surface area of ​​the cell unit 13 is the extension plane, by ensuring that most of the cell unit 13 is located within the grip portion 225 and that the extension plane is substantially aligned with the first straight line 101, the overall volume of the grip portion 225 and the battery pack 100 can be reduced, and the cell unit 13 can fully utilize the space formed by the grip portion 225 in the direction of the first straight line 101.

[0227] like Figure 7b As shown, the battery cell unit 13 is generally rectangular. The length L6 of the battery cell unit 13 is greater than or equal to 5.7 cm and less than or equal to 6.7 cm, and the width L7 of the battery cell unit 13 is greater than or equal to 2.7 cm and less than or equal to 3.7 cm. The length L6 of the battery cell unit 13 is the dimension of the battery cell unit 13 along the direction of the first straight line 101, and the width L7 of the battery cell unit 13 is the dimension of the battery cell unit 13 along a direction perpendicular to the first straight line 101 and parallel to the extension plane of the battery cell unit 13. In some embodiments, the length L6 of the battery cell unit 13 is greater than or equal to 5.9 cm and less than or equal to 6.9 cm, and the width L7 of the battery cell unit 13 is greater than or equal to 2.9 cm and less than or equal to 3.9 cm.

[0228] like Figures 6a to 12b As shown, the circuit board assembly 15 is used to control the charging and discharging of the battery pack 100 and to protect the battery pack 100. The circuit board assembly 15 is disposed inside the battery pack housing 11. Multiple electronic components are disposed on the circuit board assembly 15.

[0229] The circuit board assembly 15 includes a power management board 151. The power management board 151 manages the relationships between multiple battery cell units 13 and controls the charging and discharging parameters and processes of the battery pack 100. The extended plane of the power management board 151 is substantially parallel to the extended plane of the battery cell units 13 located within the grip portion 225. This allows for full utilization of the space on both sides of the battery cell units 13, enabling the power management board 151 and the battery cell units 13 to fully utilize the space within the ellipse.

[0230] The power management board 151 is stacked to the side of the battery cell unit 13 located in the holding part 225, and the extension plane of the power management board 151 is also parallel to the direction of the first straight line 101 of the holding part 225. It should be noted that the side of the battery cell unit 13 can be understood as the area of the battery cell unit 13 located on both sides of the extension plane. In the embodiment, both of the battery cell units 13 are arranged parallel to the power management board 151.

[0231] In the embodiment, the battery cell unit 13 located at least partially in the holding part 225 is defined as the first group of battery cells 13a. Along the direction of the first straight line 101, the first group of battery cells 13a includes: a first end 13b and a second end 13c, the first end 13b is the end of the first group of battery cells 13a close to the host interface 223, and the second end 13c is opposite to the first end 13b, the second end 13c is the end of the first group of battery cells 13a away from the host interface 223. When the battery pack 100 is combined to the holding part 225, the first end 13b is located in the holding part 225, and the second end 13c is located outside the holding part 225. That is, when the battery pack 100 is combined to the holding part 225, the first end 13b is located in the slot 224, and the second end 13c is located outside the slot 224. The battery pack interface 12 is arranged at the first end 13b of the first group of battery cells 13a. In this way, when the battery pack 100 is inserted into the slot 224, the battery pack interface 12 enters the slot 224 first. When the battery pack 100 is inserted into the bottom of the slot 224, the battery pack interface 12 located at the first end 13b can be connected with the host interface 223 located at the bottom of the slot first. Thus, when the battery pack 100 is inserted into the bottom of the slot, the stable connection between the battery pack interface 12 and the host interface 223 is achieved. In this way, not only the connection between the battery pack 100 and the tool host 21 is more stable, but also the host interface 223 and the battery pack interface 12 are protected from the interference of the external environment.

[0232] The circuit board assembly 15 further includes a terminal circuit board 152. The battery pack interface 12 includes at least one battery pack 100 terminal. For example, the battery pack interface 12 can include a positive terminal 152a, a negative terminal 152b, and can further include a detection terminal 152c, a communication terminal 152d, etc. The terminal circuit board 152 is used to support and install the battery pack 100 terminals, i.e., install the positive terminal 152a, the negative terminal 152b, the detection terminal 152c, and the communication terminal 152d. The positive terminal 152a and the negative terminal 152b are connected with the battery cell unit 13. In the embodiment, the terminal circuit board 152 is arranged at the first end 13b of the first group of battery cells 13a, so that the battery pack interface 12 can be conveniently arranged at the part of the battery pack 100 close to the bottom of the slot 224, and the size of the battery pack 100 in the direction perpendicular to the first straight line 101 can be reduced, which is beneficial to design the holding part 225 suitable for the user to hold.

[0233] The terminal circuit board 152 extends substantially in a direction perpendicular to the first straight line 101, so that the space at the first end 13b of the first group of battery cells 13a can be fully utilized. It can be appreciated that in other embodiments, the terminal circuit board 152 can also be arranged obliquely relative to the first straight line 101.

[0234] In the present embodiment, the extension plane P2 of the battery cell unit 13 can be defined as a first plane. The power management board 151 is arranged separately from the terminal circuit board 152, and the power management board 151 is arranged on the side of the first group of battery cells 13a and is parallel to the first plane. It is known that the battery pack 100 terminals usually have a certain length, so that the battery pack 100 terminals are arranged at the end of the battery cell unit 13 rather than on the side, which can reduce the size of the battery pack 100 in the plane P perpendicular to the first straight line 101, and fully utilize the space of the holding portion 225 in the direction of the first straight line 101. The extension plane of the terminal circuit board 152 is not parallel to the extension plane of the power management board 151. For example, in the present embodiment, the extension plane of the terminal circuit board 152 is substantially perpendicular to the extension plane of the power management board 151. The terminal circuit board 152 is located at the end of the battery cell unit 13 arranged in the stacking direction 102, so that the battery pack 100 terminals are located at the end of the long side of the rectangle.

[0235] As shown in Figure 6b , 6c and Figure 10 , the power management board 151 has components 151a thereon, and the components 151a are mounted on the side of the power management board 151 away from the battery cell unit 13. The volume of the components 151a is greater than or equal to 100mm 3 , and the components 151a are also arranged on the central axis 103 of the power management board 151 in the length direction or the width direction. The size L5 of the components 151a in the direction perpendicular to the extension plane is greater than or equal to 3mm, wherein the length direction is consistent with the direction of the first straight line 101, and the length direction is also perpendicular to the width direction and the thickness direction. For example, in the present embodiment, the components 151a are arranged on the central axis 103 of the power management board 151 in the width direction, so that the space in the middle of the ellipse can be fully utilized, thereby increasing the volumetric energy density of the battery pack 100. In the present embodiment, the size L5 of the components 151a in the direction perpendicular to the extension plane is greater than or equal to 3mm, so that the height of the components 151a is relatively high. If the components 151a are mounted at other positions on the power management board 151, the size of the battery pack 100 will be larger. The high-height components 151a can be, for example, capacitors, inductors, etc.

[0236] As shown in Figures 8 to 12bAs shown, the cell holder 14 is used to support the cell unit 13. In the present embodiment, the cell holder 14 comprises a first support portion 141 and a second support portion 142, the first support portion 141 is disposed on four end faces of the cell unit 13.

[0237] The first support portion 141 forms a cell accommodating cavity 112 around the four end faces of the cell unit 13. One side of the cell accommodating cavity 112 is open to improve the heat dissipation effect of the cell unit 13, and the other side of the cell accommodating cavity 112 is provided with the second support portion 142.

[0238] The second support portion 142 is disposed at one side of the cell unit 13. The first support portion 141 comprises a terminal plate support portion 141a disposed at the first end 13b of the cell unit 13, the outer side of the terminal plate support portion 141a away from the cell unit 13 is used to support the terminal circuit board 152. The inner side of the second support portion 142 is close to the surface of the cell unit 13, and the outer side of the second support portion 142 is used to mount the power management board 151. The outer side of the second support portion 142 can be formed with a groove 142a and a clamping portion 142b. The groove 142a is used to accommodate at least part of the power management board 151, and the clamping portion 142b is used to fix the power management board 151. The side of the power management board 151 close to the second support portion 142 is also provided with a detection device 151b, and the detection device 151b and the above-mentioned component 151a are respectively disposed on different sides of the power management board 151. The detection device 151b is used to detect the temperature of the cell unit 13, and the detection device 151b is disposed on the side of the power management board 151 close to the cell unit 13 to make the temperature detection more accurate. The second support portion 142 is also provided with a through hole 142c, the through hole 142c makes the space on both sides of the second support portion 142 communicate, and the detection device 151b is disposed at a position of the power management board 151 opposite to the position of the through hole 142c. The detection device 151b can be located in the through hole 142c, or even can pass through the through hole 142c and be located on the side of the second support portion 142 close to the cell unit 13, so that the distance between the detection device 151b and the surface of the cell unit 13 is closer. For example, the detection device 151b can be disposed in contact with the surface of the cell unit 13, so that the temperature of the cell unit 13 can be detected more accurately.

[0239] As Figure 3 , Figure 8 and Figure 9As shown, the battery pack housing 11 includes a first housing portion 111 and a second housing portion 112, which form a detachable connection along a first straight line 101. This facilitates the installation of the battery pack 100. The first housing portion 111 forms a first cylindrical portion 111a, which extends along the first straight line 101. The end of the first cylindrical portion 111a near the second housing portion 112 is open, and the end of the first cylindrical portion 111a away from the second housing portion 112 is provided with the battery pack 100 terminal. The end of the first cylindrical portion 111a away from the second housing portion 112 is partially closed and forms a through hole 142c that allows tool terminals or battery pack 100 terminals to pass through. The second housing portion 112 forms a second cylindrical portion 112a, which, after mating with the first cylindrical portion 111a, forms a cell receiving cavity 112 for accommodating the cell unit 13. The end of the second cylindrical portion 112a near the first cylindrical portion 111a is open, and the other end is at least partially closed. The dimension of the first housing portion 111 along the first straight line 101 is also larger than the dimension of the second housing portion 112 along the first straight line 101.

[0240] The outer wall of the second cylindrical portion 112a also forms a locking structure 112b, which is adapted to the mating structure 226 on the main housing 22 so that the battery pack 100 is locked when it is attached to the main housing 22, thereby preventing the battery pack 100 from disengaging from the power tool 200a due to vibration, and also ensuring the stability of the connection between the battery pack interface 12 and the tool interface. Specifically, the locking structure 112b is a snap-fit.

[0241] like Figure 2 , Figure 5 as well as Figure 8 As shown, the battery pack 100 also includes a power display component 161 and a first interface 162, which is used to connect an external charging device to charge the power tool 200a. The power display component 161 is used to display the remaining power of the battery pack 100. Both the power display component 161 and the first interface 162 are located on the side of the power management board 151 away from the battery cell unit 13. The first interface 162 is also configured such that the charging device is connected to the first interface 162 in a direction parallel to the power management board 151 and perpendicular to the first straight line 101.

[0242] The first interface 162 is at least partially disposed in the battery pack housing 11, specifically in the second housing portion 112. When the battery pack 100 is attached to the main tool unit, the first interface 162 is located outside the main unit housing. This allows the user to charge the battery pack 100 without disassembling it. In this embodiment, when the battery pack 100 is attached to the grip portion 225, the first interface 162 is located outside the grip portion 225.

[0243] The first interface 162 is a USB charging interface, which can be used for charging and also can output power to supply other power-consuming devices. In some embodiments, the first interface 162 is a type-c interface. The type-c interface of the first interface 162 enables the battery pack 100 to be compatible with more types of charging devices, which can be a dedicated charger specially designed for the battery pack 100 by the manufacturer of the battery pack 100, or a common type-c universal charger on the market. In this embodiment, the battery cell unit 13 in the battery pack 100 is a pouch battery cell, so that the battery pack 100 has a large volumetric energy density, and thus the battery pack 100 can not only supply power to the power tool 200a, but also has a long enough endurance time to charge other power-consuming devices, that is, the first interface 162 can also output power to enable the battery pack 100 to supply power to other power-consuming devices.

[0244] As shown in FIG. 3, the charging combination 300 includes the battery pack 100 and the first charger 31. The battery pack 100 is the battery pack 100 in Figure 14 The first charger 31 is compatible with the first interface 162, and the first charger 31 includes a first charging interface 311 detachably connected to the first interface 162. The first charger 31 is a type-c charger, and the first charging interface 311 is a type-c interface. Figures 1 to 3

[0245] In some embodiments, the first charger 31 is a common type-c universal charger on the market, which can charge a mobile phone. The charging power of the first charger 31 is less than or equal to 15 W.

[0246] Alternatively, in some embodiments, the charging power of the first charger 31 is greater than or equal to 15 W. Alternatively, the charging power of the first charger 31 is greater than or equal to 18 W. In this way, the charging time of the battery pack 100 can be shortened.

[0247] When the battery pack 100 is installed in the tool main body 21, the first interface 162 is also configured to allow access to electrical energy to charge the battery pack 100. That is, when the battery pack 100 is installed in the tool main body 21, the first charger 31 can charge the battery pack 100. In this way, the user can directly charge the battery pack 100 through the first charger 31 without removing the battery pack 100. Alternatively, when the power tool 200a is running, the first interface 162 allows access to electrical energy to charge the battery pack 100, so that the user can directly charge the battery pack 100 without disassembly, and the effect of charging while using the battery pack 100 can be achieved.

[0248] ​In some embodiments, the battery pack interface 12 can also be configured as a charging interface, through which it connects to an external charging device to charge the battery pack 100. For example... Figure 14 As shown, the charging assembly 300 also includes a second charger 32, which includes a second charging interface 321 detachably connected to the battery pack interface 12 to charge the battery pack 100. That is, the battery pack interface 12 can be configured to output power to charge the power tool 200a, and also configured to receive power to charge the battery cell unit 13. The charging power of the battery pack interface 12 is greater than or equal to 30W.

[0249] The second charger 32 has a charging connection portion 322 to which the battery pack 100 can be connected. The charging connection portion 322 is also provided with charging terminals 323 that connect to the terminals of the battery pack 100. The charging connection portion 322 can be a structure similar to the slot 224 of the grip portion 225 described above. Thus, when the battery pack 100 is connected to the second charger 32, the battery pack interface 12 is electrically connected to the second charging interface 321. The charging power of the second charger 32 is greater than or equal to 30W. In some embodiments, the charging power of the second charger 32 is greater than or equal to 40W.

[0250] like Figure 14 and Figure 15 As shown, the charging assembly 300 may further include a controller 33, which in this embodiment is disposed in the battery pack 100. The controller 33 is configured to prevent power from being supplied through the battery pack interface 12 when the first charger 31 is connected to the battery pack 100; that is, it prevents the second charger 32 from charging the battery pack 100 when the first charger 31 is charging the battery pack 100.

[0251] In other embodiments, the controller 33 may also be configured to prevent power from being supplied through the first interface 162 when the second charger 32 is connected to the battery pack 100. That is, it prevents the first charger 31 from charging the battery pack 100 while the second charger 32 is charging the battery pack 100.

[0252] In some other embodiments, the charging assembly 300 may consist only of the battery pack 100 and the first charger 31 described above, that is, the battery pack 100 can only be charged by the first charger 31.

[0253] like Figure 16 Another battery pack 400 is shown, which is related to Figure 5 The battery pack 100 shown is basically the same, the main difference being the addition of a wireless charging device 401. Other... Figure 5The structure of the battery pack 100 in the foregoing embodiments can be applied to the battery pack 400 of the present embodiment, and details are not described herein again. The following mainly introduces the difference between the present embodiment and the embodiments shown in FIGS. 1 to 8. Figure 5

[0254] As shown in FIG. 9, the wireless charging device 401 is used to access power to charge the battery cell units 403, which includes a receiving coil 402. The receiving coil 402 is arranged at one end of the stacked plurality of battery cell units 403 away from the battery pack interface 404, i.e., the receiving coil 402 is arranged at the second end of the first group of battery cell units 405. The receiving coil 402 is electrically connected with the power management board 406. Figure 16 Figure 19 As shown in FIG. 10, the wireless charging device 401 is used to access power to charge the battery cell units 403, which includes a receiving coil 402. The receiving coil 402 is arranged at one end of the stacked plurality of battery cell units 403 away from the battery pack interface 404, i.e., the receiving coil 402 is arranged at the second end of the first group of battery cell units 405. The receiving coil 402 is electrically connected with the power management board 406.

[0255] As shown in FIG. 11, the battery pack 400 and the wireless charging device 43 constitute another charging combination 45. The wireless charging device 401 is connected with the power management board 406, and the wireless charging device 401 cooperates with the wireless charging device 43 to enable the wireless charging device 43 to charge the battery cell units 403. Figure 17

[0256] The wireless charging device 43 includes a power output module and a power interface 432. The power output module is used to cooperate with the wireless charging device 401. Specifically, the power output module includes a transmitting coil 433, which is matched with the receiving coil 402, and the transmitting coil 433 and the receiving coil 402 can realize energy transfer. The power interface 432 is used to connect with external power devices, for example, the power interface 432 can be connected with a power grid. The maximum charging power of the wireless charging device 401 is less than or equal to 15 W. In this way, the battery pack 400 of the present embodiment can be charged by using the conventional wireless charging device 43 on the market, for example, some wireless charging devices 43 for charging mobile phones can also be used to charge the battery pack 400 of the present embodiment. In this way, when purchasing the battery pack 400 of the present embodiment, the user can not need to separately purchase the wireless charging device 43, but can use the existing wireless charging device 43 at home to charge the battery pack 400, thereby reducing the use cost of the user.

[0257] In some embodiments, the maximum charging power of the wireless charging device 401 is greater than or equal to 15 W. In this way, the battery pack 400 can be quickly charged. The user can purchase a dedicated wireless charging device 43 to charge, and the power of the wireless charging device 43 to charge the battery pack 400 is greater than or equal to 20 W.

[0258] In another embodiment of the battery pack 400, the battery pack 400 and the wireless charging device 43 constitute a charging combination 45. The wireless charging device 401 is connected with the power management board 406, and the wireless charging device 401 cooperates with the wireless charging device 43 to enable the wireless charging device 43 to charge the battery cell units 403. Figure 16 ​​​The battery pack 400 shown is basically the same, the main difference is that the cell unit 403 is a cylindrical cell. In this way, the wireless charging device 401 can cooperate with the wireless charging apparatus 43 to charge the cylindrical cell.

[0259] As shown in Figure 17 and Figure 18 , the battery pack 400 includes a positioning structure 407 that can position it to the charging position of the wireless charging apparatus 43. In this embodiment, the positioning structure 407 can be a first magnetic attraction device 408, and the corresponding wireless charging apparatus 43 is provided with a corresponding second magnetic attraction device 434 at the charging position. Through the cooperation of the first magnetic attraction device 408 and the second magnetic attraction device 434, the battery pack 400 can be attracted to the charging position, thereby facilitating the user to accurately position the battery pack 400, and ensuring the stability of the chargeable.

[0260] As shown in Figure 19 , the first magnetic attraction device 408 can also attract an external fan 44, which can cooperate with the air path structure on the battery pack 400 to dissipate heat from the battery pack 400. The external fan 44 is provided with a third magnetic attraction device 441 that cooperates with the first magnetic attraction device 408.

[0261] In some embodiments, the positioning structure can also be a buckle structure, which positions the battery pack to the charging position of the wireless charging apparatus through the buckle structure.

[0262] In some embodiments, the positioning structure can also be a specific positioning protrusion or groove on the surface of the battery pack, and the corresponding wireless charging apparatus is provided with a corresponding positioning groove or protrusion, and the cooperation of the protrusion and the groove realizes the positioning of the battery pack at the charging position.

[0263] In some embodiments, the positioning structure can also be the shape formed by the surface of the battery pack itself, and the wireless charging apparatus is formed with a matching shape that can cooperate with the shape to position the battery pack to the charging position.

[0264] As shown in Figure 20 , another charging combination 500 includes a first battery pack 501, a second battery pack 502, and a wireless charging apparatus 503. The first battery pack 501 can be the same as the battery pack in Figure 16 , which includes a first cell unit and a first wireless charging device capable of charging the first cell unit, and the first cell unit is a bag-shaped cell, and the specific structure is not repeated. The second battery pack 502 can also be the same as the battery pack in Figure 16The second battery pack 502 is the same as the first battery pack 501 in the embodiment, and includes a second battery cell unit and a second wireless charging device capable of charging the second battery cell unit. The second battery cell unit is a pouch-shaped battery cell, and details are not repeated here. The wireless charging device 503 is arranged to charge the first battery pack 501 and the second battery pack 502 in a preset order. In this way, one of the first battery pack 501 can be fully charged first, and then the other one is charged, so as to facilitate the user to use the first battery pack 501 in time.

[0265] In some embodiments, the wireless charging device 503 can also charge the first battery pack 501 and the second battery pack 502 at the same time, so that the first battery pack 501 and the second battery pack 502 can be used in time when some tool host needs to work using both of the battery packs. Alternatively, the first battery pack 501 and the second battery pack 502 can be used in time respectively when two tool hosts need to work.

[0266] In some embodiments, the wireless charging device 503 can also charge the first battery pack 501 and the second battery pack 502 in the order of the one with lower power first, and then charge both of them when the one with lower power is charged to the same level as the other one.

[0267] In the embodiment, both the first battery cell unit and the second battery cell unit are pouch-shaped battery cells. In other embodiments, the first battery cell unit can be a pouch-shaped battery cell, and the second battery cell unit can be a cylindrical battery cell. Alternatively, in other embodiments, both the first battery cell unit and the second battery cell unit are cylindrical battery cells.

[0268] In the embodiment, the wireless charging device 503 can charge the first battery pack 501 and the second battery pack 502. It can be understood that in other embodiments, the wireless charging device 503 can also charge more battery packs.

[0269] In the embodiment, the wireless charging device 503 has a first charging position for charging the first battery pack 501, and a second charging position for charging the second battery pack 502. It can be understood that in other embodiments, the wireless charging device 503 is also provided with multiple charging positions, so that the first battery pack 501 and the second battery pack 502 do not need to be placed in a specific position for charging, but can be charged at any position in a charging area of the wireless charging device 503, thereby improving the convenience of charging.

[0270] In another embodiment of the power tool, the power tool comprises: a tool main body, a first battery pack and a second battery pack. The tool main body comprises: an output, a motor, a first tool interface and a second tool interface. The output is configured to output power, and the motor is configured to drive the output to move. The first tool interface is configured to detachably connect with the first battery pack, and the second tool interface is configured to detachably connect with the second battery pack. The first battery pack can be the battery pack in Figure 5 , or Figure 16 , and the specific structure will not be repeated. The second battery can be the battery pack in Figure 5 or Figure 16 , and the specific structure will not be repeated. In the embodiment, the first battery pack comprises: a first battery pack shell and a first battery cell unit arranged in the first battery pack shell. The second battery pack comprises: a second battery pack shell and a second battery cell unit arranged in the second battery pack shell. The first battery cell unit is a pouch battery cell, and the second battery cell unit is a pouch battery cell. In this way, the volume energy density of the first battery pack and the second battery pack can be set to be relatively high. Thus, the endurance of the power tool is improved.

[0271] As shown in Figure 21 and Figure 25 , the application also provides another battery pack 600 suitable for the tool main body 600a, which can be adapted to the same tool main body 21 as the battery pack 100 in Figure 5 , and the main difference is that the number of battery cell units 601 contained in the battery pack 600 is different. For example, in the battery pack 100 shown in Figure 5 , the number of battery cell units 601 is 2, and the two battery cell units 601 are connected in series, so that the two battery cell units 601 constitute a first group of battery cells 602, also known as a 1P group of battery cells. In the battery pack 600 in the embodiment, the number of battery cell units 601 contained is 4. The 4 battery cell units 601 constitute a 2P battery cell group. Here, the same two battery cell units 601 as in Figure 5 are defined as the first group of battery cells 602, and the other two battery cell units 601 are the second group of battery cells 603. In the embodiment, the two battery cell units 601 in the first group of battery cells 602 are connected in series, the two battery cell units 601 in the second group of battery cells 603 are connected in series, and the first group of battery cells 602 and the second group of battery cells 603 are connected in parallel, so that the 4 battery cell units 601 constitute a 2P battery cell group. Alternatively, in some embodiments, the two battery cell units 601 in the first group of battery cells 602 are connected in parallel, the two battery cell units 601 in the second group of battery cells 603 are connected in parallel, and the first group of battery cells 602 and the second group of battery cells 603 are connected in series, so that the 4 battery cell units 601 are also considered to constitute a 2P battery cell group.

[0272] In the embodiment, when the battery pack 600 is combined with the tool host 600a, the first group of battery cells 602 is at least partially disposed within the holding portion 604, and the second group of battery cells 603 is disposed outside the holding portion 604.

[0273] For the convenience of description, in the embodiment, the battery cell units 601 in the first group of battery cells 602 can be defined as first battery cell units 605, and the battery cell units 601 in the second group of battery cells 603 can be defined as second battery cell units 606. The first battery cell units 605 and the second battery cell units 606 are both pouch-shaped battery cells. The first battery cell units 605 are partially or entirely disposed within the holding portion 604, and the second battery cell units 606 are disposed outside the holding portion 604. The extension plane of the first battery cell units 605 is parallel to the first straight line 607. The extension plane of the second battery cell units 606 is perpendicular to the first straight line 607. The extension plane of the second battery cell units 606 is perpendicular to the extension plane of the first battery cell units 605. The arrangement of the circuit board assembly 608 and the first group of battery cells 602 is the same as that of the battery pack 100 in Figure 5 The main difference is that the second group of battery cells 603 is disposed perpendicularly to the first end of the first group of battery cells 602 away from the battery pack interface 609.

[0274] The battery pack housing 610 includes a first housing portion 611 and a second housing portion 612. The first housing portion 611 and the second housing portion 612 are detachably connected. Figure 3 The first housing portion 611 and the second housing portion 612 constitute detachable connection. The second housing portion 612 includes a left housing portion 613 and a right housing portion 614. The left housing portion 613 and the right housing portion 614 are butted to form a containing space for containing the second group of battery cells 603. The battery pack housing 610 is substantially in the shape of the letter T, so that the volume of the battery pack 600 can be reduced while increasing the capacity of the battery pack 600. Alternatively, in some embodiments, the battery pack housing 610 can also be substantially in the shape of the letter L.

[0275] As shown in Figure 26 It can be understood that, in some embodiments, the first group of battery cells 701 and the second group of battery cells 702 can also be arranged along the first straight line 703, i.e., the second battery cell units 704 are disposed below the first battery cell units 705.

[0276] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the above embodiments do not limit the present application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. A charging combination comprising a first charger and a battery pack, the first charger configured to charge the battery pack, characterized in that, The battery pack is configured to power the power tool, the battery pack comprising a battery pack interface configured to be removably coupled to the first charger or the power tool, the battery pack interface comprising a battery pack terminal; The battery pack further comprises: a battery pack housing; a cell unit disposed within the battery pack housing; a first interface configured to be coupled to the first charger to introduce power; wherein the first charger comprises a first charging interface removably coupled to the first interface, the cell unit is a pouch cell, and the first interface is a Type-C interface.

2. The charging combination of claim 1, wherein, The charging combination further comprises a second charger, the second charger comprising a second charging interface configured to be coupled to the battery pack interface to charge the battery pack.

3. The charging combination of claim 2, wherein, The charging combination further comprises a controller configured to prevent access to power through the battery pack interface when the first charger is coupled to the battery pack.

4. The charging combination of claim 2, wherein, The charging combination further comprises a controller configured to prevent access to power through the first interface when the second charger is coupled to the battery pack.

5. The charging combination of claim 2, wherein, The second charger is configured to charge the cell unit through the battery pack interface at a charging power greater than or equal to 30W.

6. The charging combination of claim 1, wherein, The first charger is configured to charge the cell unit through the first interface at a charging power greater than or equal to 15W.

7. The charging combination of claim 1, wherein, The first charger is configured to charge the cell unit through the first interface at a charging power greater than or equal to 18W.

8. A charging combination comprising a first charger and a power tool, the power tool comprising: a tool main body comprising a main body housing and a motor housed within the main body housing; a battery pack configured to power the motor; the first charger configured to charge the battery pack; characterized in that the battery pack comprises: at least one cell unit configured to store electrical energy; the battery pack is removably coupled to the tool main body or the battery pack is built-in within the main body housing; wherein the first charger comprises a first charging interface electrically coupled to the battery pack to charge the battery pack, the cell unit is a pouch cell, and the first charging interface is a Type-C interface.

9. The charging combination of claim 8, wherein, The battery pack is removably coupled to the tool main body, the battery pack comprises a first interface mating with the first charging interface, and the first interface is configured to allow the first charger to charge the battery pack when the battery pack is installed to the tool main body.

10. A power tool comprising: a tool main body comprising an output configured to output power, a motor configured to drive the output, and a main body housing configured to house at least part of the motor; a battery pack configured to be removably coupled to the main body housing to power the motor; characterized in that the tool main body comprises a main body interface, the battery pack comprises a battery pack interface mating with the main body interface, the main body interface and the battery pack interface are coupled when the battery pack is installed to the tool main body, and the battery pack further comprises: a battery pack housing; a cell unit disposed within the battery pack housing and electrically coupled to the battery pack interface; A first interface is provided on the battery pack housing to charge the battery pack; The battery cell unit is a pouch cell, and when the battery pack is combined with the tool main body, at least part of the battery cell unit is located in the main body housing and the first interface is located outside the main body housing, and the first interface is a type-c interface.

11. The power tool of claim 10, wherein, When the battery pack is installed in the tool main body, the first interface is arranged to allow access to electrical energy to charge the battery pack.

12. The power tool of claim 10, wherein, The main body housing includes a holding portion for a user to hold, and when the battery pack is combined with the tool main body, at least part of the battery cell unit is located in the holding portion and the first interface is located outside the holding portion.

13. The power tool of claim 12, wherein, The holding portion extends along a first linear direction, and the battery pack is combined with the holding portion along the first linear direction.

14. The power tool of claim 10, wherein, When the battery pack is installed in the tool main body and the power tool is running, the first interface is arranged to allow access to electrical energy to charge the battery pack.

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