Battery pack and charging combination suitable for electric tool

Abstract

The invention discloses a battery pack and charging combination suitable for an electric tool, and the battery pack comprises a battery pack housing which is provided with a combination part used for being connected with the electric tool, and the battery pack is detachably connected to the electric tool through the combination part; the battery cell unit is used for storing electric energy, and the battery cell unit is arranged in the battery pack shell; the power management board is used for controlling the battery pack, and the power management board is arranged in the battery pack shell; the battery pack interface is connected with the electric tool so as to provide power for the electric tool; the wireless charging device is arranged to be matched with wireless charging equipment to charge the battery cell unit, the battery cell unit is a bag-shaped battery cell, and the wireless charging device is connected with the power management board. The battery pack in the charging combination is more convenient to charge, longer in endurance time and smaller in size.

Description

Technical Field

[0001] This application relates to the field of tools, and particularly to a battery pack and charging combination suitable for power tools. Background Art

[0002] Power tools in the related art usually include a tool main body and a battery pack. Existing tool main bodies usually have power tools with a high-voltage platform and power tools with a low-voltage platform. Among them, the energy density of the battery pack in the power tools with a low-voltage platform is relatively low, resulting in a short battery life for these power tools. The battery pack usually needs to be equipped with a dedicated charging interface, which has a complex structure and is inconvenient to charge.

[0003] This section provides background information related to this application, and these background information are not necessarily prior art. Summary of the Invention

[0004] An object of this application is to solve or at least mitigate part or all of the above problems. To this end, an object of this application is to provide a battery pack and charging combination suitable for power tools that is more convenient to charge.

[0005] To achieve the above object, this application adopts the following technical solutions: A battery pack suitable for power tools includes: a battery pack housing formed with a joint for connecting to a power tool; a battery cell unit disposed in the battery pack housing; a power management board disposed in the battery pack housing; a battery pack interface connected to the power tool to supply power to the power tool; a wireless charging device configured to cooperate with a wireless charging device to charge the battery cell unit, wherein the battery cell unit is a pouch-type battery cell, and the wireless charging device is connected to the power management board.

[0006] In some embodiments, the maximum charging power of the wireless charging device is less than or equal to 15W.

[0007] In some embodiments, the maximum charging power of the wireless charging device is greater than 15W.

[0008] In some embodiments, the number of battery cell units includes a plurality, and the plurality of battery cell units are stacked. The wireless charging device includes a receiving coil, and the receiving coil is at least partially disposed at the end of the plurality of stacked battery cell units.

[0009] In some embodiments, the battery pack interface is disposed at the other end of the plurality of stacked battery cell units.

[0010] A charging combination includes a battery pack and a wireless charging device configured to charge the battery pack. The battery pack includes: a battery pack housing; a battery cell unit disposed within the battery pack housing; a power management board disposed within the battery pack housing; a battery pack interface configured to connect to a power tool to supply power to the power tool; and a wireless charging device configured to cooperate with the wireless charging device to charge the battery cell unit. Wherein, the battery pack can be detachably coupled to a power tool to supply power to the power tool. The battery cell unit is a pouch-type battery cell. The wireless charging device includes a power output module that cooperates with the wireless charging device. The power at which the wireless charging device charges the battery pack is greater than or equal to 15W.

[0011] A battery pack suitable for a power tool includes: a battery pack housing formed with a coupling portion for connecting to the power tool; a battery cell unit disposed within the battery pack housing; a power management board disposed within the battery pack housing; a battery pack interface connected to the power tool to supply power to the power tool; and a wireless charging device configured to cooperate with the wireless charging device to charge the battery cell unit. Wherein, the wireless charging device is connected to the power management board, and the battery pack interface is further configured to be detachably connected to a charger so that the charger charges the battery cell unit.

[0012] In some embodiments, the charging power of the battery pack interface is greater than or equal to 30W, and the maximum charging power of the wireless charging device is greater than 15W.

[0013] In some embodiments, the battery cell unit is a pouch-type battery cell.

[0014] In some embodiments, the battery cell unit is a cylindrical battery cell.

[0015] A charging combination, a battery pack, a first charging device, and a second charging device. The battery pack includes: a battery pack housing; a battery cell unit disposed within the battery pack housing; a battery pack interface configured to be connectable to a power tool to supply power to the power tool; a wireless charging device for accessing power to charge the battery cell unit; the first charging device includes a power output module that cooperates with the wireless charging device, and the second charging device includes a second charging interface detachably connected to the battery pack interface. The battery pack interface includes a positive terminal and a negative terminal.

[0016] A battery pack suitable for a power tool includes: a battery pack housing formed with a coupling portion for connecting to the power tool; a battery cell unit disposed within the battery pack housing; a power management board disposed within the battery pack housing; a battery pack interface connected to the power tool to supply power to the power tool; a wireless charging device configured to cooperate with the wireless charging device to charge the battery cell unit; a USB charging interface configured to be connected to a charger to charge the battery cell unit; wherein, the wireless charging device is connected to the power management board.

[0017] In some embodiments, the USB interface is also configured such that the battery pack outputs power to other electrical devices.

[0018] In some embodiments, the cell unit is a pouch cell.

[0019] In some embodiments, the cell unit is a cylindrical cell.

[0020] A charging combination includes: a first battery pack configured to supply power to a power tool, the first battery pack including a first cell unit and a first wireless charging device capable of charging the first cell unit; a second battery pack configured to supply power to the power tool, the second battery pack including a second cell unit and a second wireless charging device capable of charging the second cell unit; and a wireless charging device configured to charge the first battery pack and the second battery pack simultaneously or in a preset order.

[0021] In some embodiments, the first cell unit is a pouch cell and the second cell unit is a pouch cell.

[0022] In some embodiments, the first cell unit is a pouch cell and the second cell unit is a cylindrical cell.

[0023] In some embodiments, the first cell unit is a cylindrical cell and the second cell unit is a cylindrical cell.

[0024] A battery pack suitable for a power tool includes: a battery pack housing formed with a coupling portion for connecting to the power tool, the battery pack being detachably connected to the power tool through the coupling portion; a cell unit for storing electrical energy, the cell unit being disposed within the battery pack housing; a power management board for controlling the battery pack, the power management board being disposed within the battery pack housing; a battery pack interface for connecting to the power tool to supply power to the power tool; and a wireless discharging device configured to cooperate with an electrical device to charge or supply power to the electrical device; wherein the cell unit is a pouch cell and the wireless discharging device is connected to the power management board.

[0025] A battery pack suitable for a power tool includes: a battery pack housing formed with a coupling portion for connecting to the power tool, the battery pack being detachably connected to the power tool through the coupling portion; a cell unit for storing electrical energy, the cell unit being disposed within the battery pack housing; a power management board for controlling the battery pack, the power management board being disposed within the battery pack housing; a battery pack interface for connecting to the power tool to supply power to the power tool; and a wireless charging and discharging device configured to selectively cooperate with an electrical device to charge or supply power to the electrical device or cooperate with a wireless charging device to enable the wireless charging device to charge the cell unit; wherein the cell unit is a pouch cell and the wireless charging and discharging device is connected to the power management board.

[0026] In some embodiments, the wireless charging and discharging device has a charging mode and a discharging mode. When the wireless charging and discharging device is in the charging mode, the battery pack is charged by the wireless charging device. When the wireless charging and discharging device is in the discharging mode, the battery pack charges or supplies power to the electrical device.

[0027] An electric tool includes: 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, and the battery pack includes a battery pack interface that cooperates 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. 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 nominal voltage of the battery pack is greater than or equal to 3V and less than or equal to 9V.

[0028] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V and less than or equal to 9V.

[0029] In some embodiments, the number of battery cell units is less than or equal to 4.

[0030] In some embodiments, a plurality of battery cell units are disposed in the battery pack housing, and the plurality of battery cell units are stacked.

[0031] In some embodiments, the main body housing includes a holding portion, and when the battery pack is combined with the tool main body, a part of the battery pack housing is located within the holding portion.

[0032] In some embodiments, the main body housing includes a holding portion, and when the battery pack is combined with the tool main body, a part of the battery cell units is located within the holding portion.

[0033] In some embodiments, the nominal voltage of the battery pack is less than or equal to 13V.

[0034] A charging combination includes a charger and a battery pack, and the charger is 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 to the battery pack to transmit power to the battery pack to charge the battery pack. The battery pack includes: a battery pack housing; a battery cell unit disposed in the battery pack housing; a battery pack interface that connects to the charging interface when the battery pack is combined with the charger. Wherein, the battery pack interface is electrically connected to the battery cell unit, the battery cell unit is a pouch-type battery cell, and the nominal voltage of the battery pack is less than or equal to 9V.

[0035] A battery pack applicable to power tools, comprising: a battery pack housing; a battery cell unit disposed within the battery pack housing; a battery pack interface for outputting power to a power tool, the battery pack interface being electrically connected to the battery cell unit; wherein the battery pack is configured to be detachably connected to the power tool, the number of battery cell units is less than or equal to 4, the battery cell units are pouch-type battery cells, and the nominal voltage of the battery pack is less than or equal to 9V.

[0036] 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 to the battery cell unit, at least a portion of the plurality of battery cell units are stacked along a stacking direction, and the terminal circuit board is disposed at an end of the plurality of battery cell units stacked along the stacking direction.

[0037] A power 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 a portion of the motor; a battery pack for supplying power to the motor; wherein the battery pack further includes: at least one battery cell unit configured to store electrical energy; the battery cell unit is a pouch-type battery cell, and the nominal voltage of the battery pack is greater than or equal to 3V and less than or equal to 9V.

[0038] A power 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 a portion 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 mounted to 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 within 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.

[0039] In some embodiments, the nominal voltage of the battery pack is less than or equal to 9V.

[0040] In some embodiments, the number of battery cell units is less than or equal to 4, and at least a portion of the plurality of battery cell units are stacked.

[0041] In some embodiments, the main body housing includes: a gripping portion for the user to hold, when the battery pack is coupled to the tool main body, a portion of the battery pack housing is located within the gripping portion.

[0042] In some embodiments, the main body housing includes: a gripping portion for the user to hold, when the battery pack is coupled to the tool main body, a portion of the battery cell units are located within the gripping portion.

[0043] In some embodiments, the main body housing includes a motor receiving portion for receiving a motor and a gripping portion for a user to grip. The extending direction of the motor receiving portion intersects with the extending direction of the gripping portion. The battery pack is coupled to the gripping portion along the extending direction of the gripping portion.

[0044] In some embodiments, the power tool is a screwdriver, a drill, a percussion drill, a sander, or a cutter.

[0045] In some embodiments, the main body housing includes a motor receiving portion for receiving a motor and a gripping portion for a user to grip. The extending direction of the motor receiving portion is substantially the same as the extending direction of the gripping portion. The battery pack is coupled to the gripping portion along the extending direction of the gripping portion.

[0046] In some embodiments, when the battery pack is coupled to the tool main body, the power tool is substantially in the shape of the Chinese character "one".

[0047] A power tool includes: 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 receiving at least a 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 adapted to the main body interface, and when the battery pack is mounted to the tool main body, the main body interface and the battery pack interface are connected. The battery pack further includes: a battery pack housing; at least one battery cell unit disposed in the battery pack housing for storing electrical energy and electrically connected to the battery pack interface; the main body housing includes a motor receiving portion for receiving a motor and a gripping portion for a user to grip. The extending direction of the motor receiving portion is substantially the same as the extending direction of the gripping portion. The battery pack is coupled to the gripping portion along the extending direction of the gripping portion. The battery cell unit is a pouch-type battery cell, and the output power of the battery pack is greater than or equal to 140 W and less than or equal to 750 W.

[0048] A power tool includes: 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 receiving at least a 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 adapted to the main body interface, and when the battery pack is mounted to the tool main body, the main body interface and the battery pack interface are connected. 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 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.

[0049] In some embodiments, the volumetric energy density of the battery pack is greater than or equal to 120 mWh / cm 3 .

[0050] In some embodiments, the weight energy density of the battery pack is greater than or equal to 100 mWh / g.

[0051] In some embodiments, the nominal voltage of the battery pack is 8V.

[0052] In some embodiments, the number of battery cell units in the battery pack housing is 2, and the weight of the battery pack is less than or equal to 200 g.

[0053] In some embodiments, the number of battery cell units in the battery pack housing is 2, and the volume of the battery pack is less than or equal to 200 cm 3 .

[0054] In some embodiments, the capacity of the battery pack is greater than or equal to 1.5 Ah and less than or equal to 5 Ah.

[0055] In some embodiments, the number of battery cell units in the battery pack housing is 4, and 4 battery cell units form a 2P battery cell group.

[0056] In some embodiments, the tool main body housing includes: a motor housing part for accommodating the motor and a gripping part for the user to grip. When the battery pack is coupled to the tool main body, at least part of the battery cell units are located within the gripping part.

[0057] A battery pack suitable for an electric tool, comprising: a battery pack housing formed with a coupling part for connecting to the electric tool; battery cell units disposed within the battery pack housing; a battery pack interface for outputting power to the electric tool, the battery pack interface being electrically connected to the battery cell units; wherein the battery cell units are pouch-type battery cells, and the volume 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 9V.

[0058] 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 tool main body housing for accommodating at least part of the motor; a battery pack for detachably connecting to the tool main body housing to supply power to the motor; wherein the tool main body includes a tool main body interface, the battery pack includes a battery pack interface that mates with the tool main body interface, and when the battery pack is installed on the tool main body, the tool main body interface and the battery pack interface are connected. The battery pack further includes: a battery pack housing; battery cell units disposed within the battery pack housing and electrically connected to the battery pack interface; the battery cell units are pouch-type battery cells, the weight 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 9V.

[0059] 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 cooperates 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 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.

[0060] In some embodiments, the number of battery cell units in the battery pack housing is 2, and the two battery cell units are connected in series.

[0061] 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.

[0062] In some embodiments, the weight energy density of the battery pack is greater than or equal to 100 mWh / g.

[0063] In some embodiments, the number of battery cell units in the battery pack housing is 2, and the weight of the battery pack is less than or equal to 180 g.

[0064] In some embodiments, the capacity of the battery pack is greater than or equal to 1.5 Ah and less than or equal to 5 Ah.

[0065] In some embodiments, the electric tool is a handheld electric tool, the main body housing includes a holding portion for the user to hold, and the battery pack is coupled to the holding portion.

[0066] A battery pack suitable for an electric tool, comprising: a battery pack housing; a battery cell unit disposed in the battery pack housing; a battery pack interface for outputting power to the electric tool, the battery pack interface being electrically connected to the battery cell unit; wherein, the battery pack is configured to be detachably coupled to the electric tool, and the volume energy density of the battery pack is greater than or equal to 100 mWh / cm 3 , the volume of the battery pack is less than or equal to 250 cm 3 .

[0067] 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 adapted to 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 ratio of the output power of the battery pack to the volume of the battery pack is greater than or equal to 1 W / cm 3 , and the volume of the battery pack is less than or equal to 150 cm 3 .

[0068] 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 adapted to 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, the ratio of the output power of the battery pack to the weight of the battery pack is greater than or equal to 1 W / g, and the weight of the battery pack is less than or equal to 180 g.

[0069] 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 adapted to 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 main body housing includes: a motor housing part for accommodating at least part of the motor; a grip part for the user to hold; wherein, the battery cell unit is a pouch-type battery cell, when the battery pack is combined with the tool main body, at least part of the battery cell unit is located in the grip part, the battery pack is combined with the grip part along a first straight line direction, the perimeter of the outer contour of the cross-section of the part of the battery pack located in the grip part 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.

[0070] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V.

[0071] In some embodiments, the number of battery cell units in the battery pack housing is greater than or equal to 2.

[0072] In some embodiments, the extended plane of the pouch-shaped battery cell is substantially parallel to the first straight line.

[0073] In some embodiments, the number of battery 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.

[0074] In some embodiments, the volumetric energy density of the battery pack is greater than or equal to 120 mWh / cm 3 .

[0075] 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 12.5 cm and less than or equal to 16 cm.

[0076] In some embodiments, the gravimetric energy density of the battery pack is greater than or equal to 110 mWh / g.

[0077] 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 for cooperating with the main body interface, and when the battery pack is installed on the tool main body, the main body interface and the battery pack interface are connected. The battery pack further includes: a battery pack housing; battery cell units disposed in the battery pack housing and electrically connected to the battery pack interface; the main body housing includes: a motor housing portion for accommodating at least part of the motor; a holding portion for a user to hold; wherein the battery cell units are pouch-shaped battery cells, and when the battery pack is combined with the tool main body, at least part of the battery cell units are located in the holding portion, the battery pack is combined with the holding portion in the first straight line direction, the perimeter of the outer contour of the 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 volumetric energy density of the battery pack is greater than or equal to 100 mWh / cm 3 .

[0078] 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 a 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 cooperates with the main body interface, and when the battery pack is installed on the tool main body, the main body interface and the battery pack interface are connected. 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 main body housing includes: a motor housing portion for accommodating at least a part of the motor; a grip portion for a user to hold; wherein when the battery pack is combined with the tool main body, at least a part of the battery cell unit is located in the grip portion, the battery pack is combined with the grip portion along a first straight line direction, and the perimeter of the outer contour of the cross-section of the part of the battery pack located in the grip 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 weight energy density of the battery pack is greater than or equal to 100 mWh / g.

[0079] 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 a 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 cooperates with the main body interface, and when the battery pack is installed on the tool main body, the main body interface and the battery pack interface are connected. 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 main body housing includes: a motor housing portion for accommodating at least a part of the motor; a grip portion for a user to hold; wherein the battery cell unit is a pouch-type battery cell, when the battery pack is combined with the tool main body, at least a part of the battery cell unit is located in the grip portion, the battery pack is combined with the grip portion along a first straight line direction, and the area of the cross-section of the part of the battery pack located in the grip 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.

[0080] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V.

[0081] In some embodiments, the number of battery cell units in the battery pack housing is greater than or equal to 2.

[0082] In some embodiments, the extension plane of the pouch-type battery cell is substantially parallel to the first straight line.

[0083] In some embodiments, the number of battery 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.

[0084] In some embodiments, the volumetric energy density of the battery pack is greater than or equal to 120 mWh / cm 3 .

[0085] In some embodiments, the area of the 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.

[0086] In some embodiments, the gravimetric energy density of the battery pack is greater than or equal to 110 mWh / g.

[0087] 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 a 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 adapted to 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 main body housing includes: a motor housing portion for accommodating at least a part of the motor; a holding portion for the user to hold; wherein, the battery cell unit is a pouch-type battery cell, when the battery pack is coupled to the tool main body, at least a part of the battery cell unit is located in the holding portion, the battery pack is coupled to the holding portion along a first straight line direction, the area of the 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 / cm 3 .

[0088] 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 a 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 adapted to 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 main body housing includes: a motor housing portion for accommodating at least a part of the motor; a holding portion for the user to hold; wherein, when the battery pack is coupled to the tool main body, at least a part of the battery cell unit is located in the holding portion, the battery pack is coupled to the holding portion along a first straight line direction, the area of the 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.

[0089] 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 adapted to 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 main body housing includes: a motor housing portion for accommodating at least part of the motor; a grip portion for the user to hold; wherein, when the battery pack is combined with the tool main body, at least part of the battery cell unit is located in the grip portion, the battery pack is combined with the grip portion along a first straight line direction, and the area of the cross-section of the part of the battery pack located in the grip 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 battery cell unit is a pouch-type battery cell.

[0090] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V.

[0091] In some embodiments, the number of battery cell units in the battery pack housing is greater than or equal to 2.

[0092] In some embodiments, the nominal voltage of the battery pack is less than or equal to 9V.

[0093] In some embodiments, the extended plane of the battery cell unit located in the grip portion is substantially parallel to the first straight line direction.

[0094] In some embodiments, the area of the cross-section of the grip 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.

[0095] 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 3.7 cm and less than or equal to 4.7 cm.

[0096] 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 2.7 cm and less than or equal to 3.7 cm.

[0097] In some embodiments, the number of battery cell units in the battery pack housing is 2, and the energy of the battery pack is greater than or equal to 7 Wh and less than or equal to 9 Wh.

[0098] 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 a 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 adapted to the main body interface, when the battery pack is mounted to 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 main body housing includes: a motor housing part for accommodating at least a part of the motor; a grip part for a user to grip; wherein, when the battery pack is coupled to the tool main body, at least a part of the battery cell unit is located in the grip part, the battery pack is coupled to the grip part along a first straight line direction, the width of a cross-section of the part of the battery pack located in the grip part 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, the 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-type battery cell.

[0099] 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 a part of the motor; a battery pack for supplying power to the motor; wherein, the battery pack further includes: at least one battery cell unit configured to store energy; the main body housing includes: a motor housing part for accommodating at least a part of the motor; a grip part for a user to grip; wherein, at least a part of the battery cell unit is located in the grip part, the grip part extends along a first straight line direction, the extension plane of the battery cell unit is parallel to the first straight line, the area of a cross-section of the grip part 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-type battery cell.

[0100] 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 a 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 adapted to the main body interface, when the battery pack is mounted to 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 main body housing includes: a motor housing part for accommodating at least a part of the motor; a grip part for a user to grip; wherein, when the battery pack is coupled to the tool main body, at least a part of the battery cell unit is located in the grip part, the battery pack is coupled to the grip part along a first straight line direction, the perimeter of the outer contour of a cross-section of the part of the battery pack located in the grip part 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-type battery cell.

[0101] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V.

[0102] In some embodiments, the number of battery cell units within the battery pack housing is greater than or equal to 2.

[0103] In some embodiments, the nominal voltage of the battery pack is less than or equal to 9V.

[0104] In some embodiments, the extension plane of the battery cell unit located within the gripping portion is substantially parallel to the first linear direction.

[0105] In some embodiments, the perimeter of the outer contour of the cross-section of the gripping portion in a plane perpendicular to the first straight line is greater than or equal to 12.5 cm and less than or equal to 16 cm.

[0106] 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 3.7 cm and less than or equal to 4.7 cm.

[0107] 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 2.7 cm and less than or equal to 3.7 cm.

[0108] In some embodiments, the number of battery cell units within the battery pack housing is 2, and the energy of the battery pack is greater than or equal to 7 Wh and less than or equal to 9 Wh.

[0109] In some embodiments, the battery cell unit includes a first group of battery cells and a second group of battery cells. When the battery pack is coupled to the tool main body, at least a portion of the first group of battery cells is disposed within the gripping portion, and the second group of battery cells is located outside the gripping portion.

[0110] 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 a portion 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, and when the battery pack is installed on the tool main body, the main body interface and the battery pack interface are connected. The battery pack further includes: a battery pack housing; a battery cell unit disposed within the battery pack housing and electrically connected to the battery pack interface; the main body housing includes: a motor housing portion for accommodating at least a portion of the motor; a gripping portion for being gripped by a user and extending substantially along a first linear direction; the battery cell unit is a pouch-type battery cell, and when the battery pack is coupled to the tool main body, at least a portion of the battery cell unit is located within the gripping portion, and the extension plane of at least a portion of the battery cell unit located within the gripping 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.

[0111] In some embodiments, the battery pack further includes: a power management board, the extended plane of the power management board being substantially parallel to the extended plane of the battery cell unit that is at least partially located within the grip portion.

[0112] In some embodiments, the battery pack further includes: a power management board, the power management board being stacked on the side surface of the battery cell unit that is at least partially located within the grip portion.

[0113] In some embodiments, the battery cell unit that is at least partially located within the grip portion is defined as the first group of battery cells. Along the first linear direction, the first group of battery cells includes a first end close to the host interface and a second end opposite to the first end, and the battery pack interface is disposed at the first end.

[0114] In some embodiments, the battery pack interface includes at least one battery pack terminal, and the battery pack further includes: a terminal circuit board for mounting the battery pack terminal, the terminal circuit board being disposed at the first end.

[0115] In some embodiments, the terminal circuit board extends substantially perpendicular to the first linear direction.

[0116] In some embodiments, the number of battery cell units that are at least partially located within the grip portion is 2.

[0117] In some embodiments, the battery cell unit that is at least partially located within the grip portion is defined as the first group of battery cells. The battery pack further includes a second battery cell unit located outside the grip portion when it is combined with the tool host. The second battery cell unit is a pouch-type battery cell, and the extended plane of the second battery cell unit is substantially perpendicular to the extended plane of the battery cell unit.

[0118] In some embodiments, the battery cell unit that is at least partially located within the grip portion is defined as the first group of battery cells. The battery pack further includes a plurality of second battery cell units located outside the grip portion when it is combined with the tool host. The plurality of second battery cell units are pouch-type battery cells. The battery cell units in the first group of battery cells are connected in series with each other, and the plurality of second battery cell units are connected in series with each other.

[0119] An electric 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 part of the motor; a battery pack for supplying power to the motor; wherein, the battery pack further includes: at least one battery cell unit configured to store energy; the host housing includes: a motor housing portion for accommodating at least part of the motor; a grip portion for the user to hold and extending substantially along a first linear direction; the battery cell unit is a pouch-type battery cell, at least part of the battery cell unit is located within the grip portion, and the extended plane of the battery cell unit that is at least partially located within the grip portion is substantially parallel to the first linear direction.

[0120] A battery pack applicable to a power tool, comprising: a battery pack housing formed with a coupling portion for connecting to the power tool; a battery cell unit disposed within the battery pack housing, the battery cell unit being a pouch-type battery cell that extends substantially along a first plane; a battery pack interface for outputting power to the power tool, the battery pack interface being electrically connected to the battery cell unit; a power management board, the extension plane of the power management board being substantially parallel to the first plane such that the power management board is disposed on the side of the battery cell unit; wherein the coupling portion is configured to detachably connect the battery pack to the power tool, and the battery pack interface includes: at least one battery pack terminal, and at least one battery pack terminal is located at an end of the battery cell unit.

[0121] In some embodiments, the battery pack is configured to be coupled to the power tool along a first linear direction, and the first linear direction is substantially parallel to the first plane.

[0122] In some embodiments, the battery cell unit is substantially rectangular, and at least one battery pack terminal is located at an end of the long side of the rectangle.

[0123] In some embodiments, the battery cell unit is substantially rectangular, the length of the battery 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 battery cell unit is greater than or equal to 2.7 cm and less than or equal to 3.7 cm.

[0124] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V and less than or equal to 9V.

[0125] In some embodiments, the battery pack further includes a terminal circuit board for mounting at least one battery pack terminal, and the terminal circuit board is disposed at an end of the battery cell unit.

[0126] In some embodiments, the terminal circuit board is separately disposed from the power management board.

[0127] A battery pack applicable to a power tool, comprising: a battery pack housing formed with a coupling portion for connecting to the power tool; a battery cell unit disposed within the battery pack housing, the battery cell unit being a pouch-type battery cell that extends substantially along a first plane; a battery pack interface for outputting power to the power tool, the battery pack interface being electrically connected to the battery cell unit, and the battery pack interface includes 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 such that the power management board is disposed on the side of the battery cell unit; a terminal circuit board for supporting the battery pack terminal; wherein the coupling portion is configured to detachably connect the battery pack to the power tool, the terminal circuit board is separately disposed from the power management board, and the extension plane of the terminal circuit board is not parallel to the extension plane of the power management board.

[0128] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V and less than or equal to 9V.

[0129] In some embodiments, the extended plane of the terminal circuit board is perpendicular to the extended plane of the power management board.

[0130] 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.

[0131] In some embodiments, the number of cell units arranged in parallel with the power management board is 2.

[0132] A battery pack applicable to a power tool, comprising: a battery pack housing formed with a joint for connecting to the power tool; a cell unit disposed in the battery pack housing, the cell unit being a pouch cell and extending substantially along a first plane; a battery pack interface for outputting power to the power tool, the battery pack interface being electrically connected to the cell unit, the battery pack interface including at least one battery pack terminal; a power management board, the extended plane of the power management board being substantially parallel to the first plane so that the power management board is disposed on the side of the cell unit; components mounted on the side of the power management board away from the cell unit; the volume of the components being greater than or equal to 100 mm 3 , and the components are disposed on the central axis in the length direction or width direction of the power management board.

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

[0134] 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.

[0135] A charging combination includes a first charger and a battery pack, the first charger being configured to charge the battery pack; the battery pack includes: a battery pack housing; a cell unit disposed in the battery pack housing; a first interface configured to connect to the first charger to introduce power; wherein, the first charger includes a first charging interface detachably connected to the first interface, the cell unit is a pouch cell, and the first interface is a Type-C interface.

[0136] In some embodiments, the battery pack further includes a battery pack interface for connecting to a power tool to supply power to the power tool by the battery pack, and the battery pack interface includes battery pack terminals.

[0137] In some embodiments, the charging combination further includes: a second charger, the second charger including a second charging interface connected to the battery pack interface to charge the battery pack.

[0138] In some embodiments, the charging combination further includes: a controller configured to: prevent power from being accessed through the battery pack interface when the first charger is connected to the battery pack.

[0139] In some embodiments, the charging combination further includes: a controller configured to prevent power access through the first interface when the second charger is connected to the battery pack.

[0140] In some embodiments, the charging power of the second charger for charging the battery cell unit through the battery pack interface is greater than or equal to 30W.

[0141] In some embodiments, the charging power of the first charger for charging the battery cell unit through the first interface is less than or equal to 15W.

[0142] In some embodiments, the charging power of the first charger for charging the battery cell unit through the first interface is greater than or equal to 15W.

[0143] In some embodiments, the charging power of the first charger for charging the battery cell unit through the first interface is greater than or equal to 18W.

[0144] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V and less than or equal to 9V.

[0145] A charging combination includes a first charger and a power tool. The power tool includes: a tool main body including a main body housing and a motor accommodated in the main body housing; a battery pack configured to supply power to the motor; the first charger configured to charge the battery pack; the battery pack includes: at least one battery cell unit configured to store electrical energy; the battery pack is detachably coupled to the tool main body, or the battery pack is built into the main body housing; wherein, the first charger includes a first charging interface electrically connected to the battery pack to charge the battery pack, the battery cell unit is a pouch-type battery cell, and the first charging interface is a Type-C interface.

[0146] In some embodiments, the battery pack is detachably coupled to the tool main body, the battery pack includes a first interface that mates with the first charging interface, and when the battery pack is installed on the tool main body, the first interface is configured to allow the first charger to charge the battery pack.

[0147] 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 adapted to the main body interface, when the battery pack is mounted to 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; a first interface disposed on the battery pack housing for charging the battery pack; the battery cell unit is a pouch-type battery cell, when the battery pack is combined with the tool main body, at least part of the battery cell unit is located inside the main body housing and the first interface is located outside the main body housing, and the first interface is a type-c interface.

[0148] In some embodiments, when the battery pack is mounted to the tool main body, the first interface is configured to allow access to electrical energy to charge the battery pack.

[0149] In some embodiments, the main body housing includes a grip portion for the user to hold, when the battery pack is combined with the tool main body, at least part of the battery cell unit is located inside the grip portion, and the first interface is located outside the grip portion.

[0150] In some embodiments, the grip portion extends along a first linear direction, and the battery pack is combined with the grip portion along the first linear direction.

[0151] In some embodiments, when the battery pack is mounted to the tool main body and the electric tool is operating, the first interface is configured to allow access to electrical energy to charge the battery pack.

[0152] The advantages of the present application are as follows: The battery cell unit of the battery pack is a pouch-type battery cell, so that the energy density of the battery pack is relatively high, the battery life of the battery pack is improved, and the volume of the electric tool can be reduced. The battery pack is charged by a wireless charging device, which is more convenient for the user to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0153] Figure 1 is a plan view of an electric tool system according to an embodiment of the present application; Figure 2 is Figure 1 the plan view of the electric drill in Figure 3 is Figure 2 the plan view when the tool main body and the battery pack of the electric drill in Figure 4 is Figure 2 the perspective view of a part of the grip portion of the electric drill in Figure 5 is Figure 1 a perspective view of the battery pack in Figure 6a is Figure 5 a plan view of the battery pack in Figure 6b is Figure 6a a sectional view of the battery pack along line A-A in Figure 6c is Figure 6a a sectional view of the battery pack along line B-B in Figure 7a is Figure 5 a side view of the battery pack in Figure 7b is Figure 7a a sectional view of the battery pack along line C-C in Figure 8 is Figure 5 an exploded view of the battery pack in Figure 9 is Figure 8 a perspective view of the structure shown from another angle Figure 10 is Figure 8 a plan view of the cell unit, cell bracket and circuit board assembly in Figure 11a is Figure 10 a perspective view of the structure shown when the circuit board assembly is separated from the cell bracket Figure 11b is Figure 11a a perspective view of the structure shown from another angle; Figure 12a is Figure 10 an exploded view of the structure shown Figure 12b is Figure 12a a perspective view of the structure shown from another angle; Figure 13 is Figure 2 a sectional view of the power tool in plane P in Figure 14 a perspective view of a charging combination of the present application in Figure 15 is a module diagram of the charging combination shown in 14; Figure 16 an exploded view of the battery pack of another embodiment of the present application; Figure 17 is a perspective view of another charging combination; Figure 18 is Figure 16 a plan view of the battery pack in Figure 19 isFigure 16 The plan view of the battery pack and a kind of fan in Figure 20 The plan view of the charging combination of another embodiment of the present application; Figure 21 The plan view of another electric tool of the present application; Figure 22 The perspective view of the battery pack of another embodiment of the present application; Figure 23 is Figure 22 The plan view of the battery pack in when the first housing part is separated; Figure 24 is Figure 22 The exploded view of the battery pack in ; Figure 25 is Figure 22 The schematic diagram of the battery cell unit in the battery pack of ; Figure 26 The schematic layout diagram of the battery cell units in another battery pack of the present application is shown; Figure 27 The exploded view of the battery pack of another embodiment is shown; Figure 28 is shown as Figure 27 The charging combination composed of the battery pack in and an electrical device; Figure 29 The system diagram composed of the battery pack, the electrical device and the wireless charging device of another embodiment is shown. Detailed implementation manners

[0154] Before explaining any embodiment of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings.

[0155] In the present application, the terms "comprise", "include", "have" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device including that element.

[0156] In the present application, the term "and / or" is a relational term describing the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the present application, the character " / " generally represents that the associated objects before and after are in an "and / or" relationship.

[0157] In this application, the terms "connected", "combined", "coupled", and "mounted" can be direct connections, combinations, couplings, or mountings, or indirect connections, combinations, couplings, or mountings. Among them, by way of example, a direct connection means that two parts or components are connected together without an intermediate member, and an indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, and can include electrical connections or couplings.

[0158] In this application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or condition (e.g., "about", "approximately", "substantially", etc.) are intended to include the recited value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances resulting from manufacture, assembly, use, etc. associated with a particular value. Such terms should also be considered to disclose a range defined by the absolute values of the two endpoints. The relative term may refer to a plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values without the use of relative terms should also be disclosed as specific values with tolerances. In addition, "substantially" when expressing a relative angular positional relationship (e.g., substantially parallel, substantially perpendicular) may refer to a plus or minus a certain number of degrees (e.g., 1 degree, 5 degrees, 10 degrees or more) from the indicated angle.

[0159] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0160] In this application, the directional terms such as "upper", "lower", "left", "right", "front", "rear", etc. are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that the directional terms such as upper side, lower side, left side, right side, front side, rear side, etc. not only represent the positive direction, but can also be understood as the side direction. For example, the lower side can include directly below, lower left, lower right, lower front, and lower rear, etc.

[0161] In this application, the terms "controller", "processor", "central processing unit", "CPU", and "MCU" are interchangeable. When using the unit "controller", "processor", "central processing unit", "CPU", or "MCU" to perform a specific function, unless otherwise specified, these functions can be performed by a single one of the above units or multiple ones of the above units.

[0162] In this application, the terms "device", "module", or "unit" can be implemented in the form of hardware or software in order to achieve a specific function.

[0163] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or a similar electronic computing device (such as a controller, a processor, etc.).

[0164] As Figure 1 shown, the battery pack 100 is used to supply power to the power tool. The battery pack 100, as an energy storage device, can transmit electric power to the power tool to supply power to the electrical components in the power tool. As Figure 1 shown, the power tool can be a drill 200a, a grinder 200b, a wrench 200c, or a cutting machine 200d. It can be understood that in other embodiments, the power tool can also be a torque output tool such as a screwdriver, a percussion drill, a hammer drill, a ratchet wrench, etc. The power tool can also be a grinding tool such as a bench grinder, a sander, a straight grinder, a polishing machine, etc. The power tool can also be a cutting tool such as a circular saw, a reciprocating saw, a jigsaw, etc. In some embodiments, the battery pack 100 can also be set to be detachably coupled to devices such as an electric fan, a lamp, etc. to supply power to these devices. The battery pack 100 can supply power to the motor 212 that drives the fan blades or the light-emitting element.

[0165] As Figure 2 and Figure 3 shown, the drill 200a is taken as an embodiment of a specific power tool in this embodiment. Hereinafter, the power tool 200a is used instead of the drill 200a.

[0166] The electric tool 200a includes: a tool main body 21, and a battery pack 100 is detachably connected to the tool main body 21 to provide power to the tool main body 21. The tool main body 21 includes: an output member 211, a motor 212 and a main body housing 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 this embodiment, for the electric drill 200a, the output member 211 can be connected to the drill bit to drive the drill bit to rotate. For other electric tools 200a, the output member 211 can also be a bit, a blade, a saw blade, a saw blade, a sanding base plate, a grinding base 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 housing 22. A transmission assembly can also be arranged between the motor 212 and the output member 211.

[0167] The main body housing 22 is used to accommodate the motor 212. The main body housing 22 includes a housing portion 221 for accommodating the motor 212. The battery pack 100 can be detachably connected to the main body housing 22. When the battery pack 100 is connected to the main body housing 22, the battery pack 100 can be electrically connected to the motor 212 to power the motor 212. The tool host 21 may also include a trigger 213 for starting the motor 212. When the trigger 213 is triggered by the user, the battery pack 100 outputs power to the motor 212 to enable the motor 212 to operate.

[0168] like Figure 4 The host housing 22 includes: a coupling portion 222 and a host interface 223. The coupling portion 222 is used to detachably couple the battery pack 100 to the tool host 21, and the host interface 223 is used to form an electrical connection with the battery pack 100. Figure 5 As shown, the battery pack 100 includes: a mating portion 111 and a battery pack interface 12. The mating portion 111 is mated with the bonding portion 222 to guide the battery pack 100 to be coupled to the main body housing 22 along the first straight line 101. The battery pack interface 12 is mated with the main body interface 223, so that when the battery pack 100 is coupled to the main body housing 22, the battery pack 100 is electrically connected to the tool main body 21.

[0169] like Figure 4 and Figure 5 As shown, the main body housing 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 coupled to the main body housing 22, a portion of the battery pack 100 is located in the slot 224, which can reduce the size of the entire power tool 200a, which is conducive to the miniaturization of the power tool 200a. When the battery pack 100 is coupled to the main body housing 22, a portion of the battery pack 100 is located outside the main body housing 22, so that the user can easily install and remove the battery pack 100, and it is also convenient for the user to observe the battery pack 100.

[0170] As Figures 5 to 9 shown, the battery pack 100 includes: a battery pack housing 11, a battery cell unit 13, a battery cell bracket 14, and a circuit board assembly 15. The battery pack housing 11 is used to form a battery cell accommodation cavity 112 for accommodating the battery cell unit 13, the battery cell bracket 14, and the circuit board assembly 15. The number of battery cell units 13 is at least one, and the battery cell unit 13 is used to store electrical energy. For example, in the Figures 5 to 9 embodiment shown, the number of battery cell units 13 is 2. In some embodiments, the number of battery cell units 13 may be multiple, that is, the number of battery cell units 13 is greater than or equal to 2. It can be understood that the number of battery cell units 13 is not limited thereto. The battery cell bracket 14 is used to support the battery cell unit 13. It can be understood that in other embodiments, the battery cell bracket 14 may not be independently provided, and the battery cell bracket 14 may be formed by the battery pack housing 11, and the battery pack housing 11 constitutes the battery cell bracket 14 for supporting the battery cell unit 13. The circuit board assembly 15 is used to control the charging process and the discharging process of the battery pack 100.

[0171] In this embodiment, the battery cell unit 13 is disposed in the battery pack housing 11, and the battery cell unit 13 is electrically connected to the battery pack interface 12, and the battery cell unit 13 supplies power to the motor 212 through the battery pack interface 12. The battery cell unit 13 is a pouch-type battery cell. The pouch-type battery cell includes a packaging bag and an electrolyte disposed in the packaging bag, etc. The pouch-type battery cell is prone to deformation, so the battery cell bracket 14 can play a certain role in fixing the shape of the pouch-type battery cell. The volume energy density of the pouch-type battery cell is greater than or equal to 0.4 Wh / cm³. In some embodiments, the volume energy density of the pouch-type battery cell is greater than or equal to 0.42 Wh / cm³. In some embodiments, the volume energy density of the pouch-type battery cell is greater than or equal to 0.44 Wh / cm³. In some embodiments, the volume energy density of the pouch-type battery cell is greater than or equal to 0.45 Wh / cm³. In some embodiments, the volume energy density of the pouch-type battery cell is greater than or equal to 0.46 Wh / cm³. In some embodiments, the volume energy density of the pouch-type battery cell is greater than or equal to 0.48 Wh / cm³. In some embodiments, the volume energy density of the pouch-type battery cell is greater than or equal to 0.5 Wh / cm³. In some embodiments, the volume energy density of the pouch-type battery cell is greater than or equal to 0.51 Wh / cm³. In some embodiments, the volume energy density of the pouch-type battery cell is greater than or equal to 0.52 Wh / cm³. In some embodiments, the volume energy density of the pouch-type battery cell is greater than or equal to 0.53 Wh / cm³.

[0172] 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. Herein, for the power tool 200a and the battery pack, the nominal voltage generally refers to the voltage specified by the manufacturer or seller on the labels, packages, user manuals, specifications, advertisements, marketing, or other supporting documents of these products, so that users can understand which power tools 200a and battery packs can operate with each other. Alternatively, the nominal voltage of the battery pack 100 can also be obtained by means of detection or calculation. The voltage of a single cell unit 13 is generally between 3.6V and 4.2V. In Figures 5 to 9 In the illustrated embodiment, the battery pack 100 includes two cell units 13, the voltage of each cell unit 13 is basically 4V, and the two cell units 13 are connected in series. Therefore, 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, specifically, it can be considered to be 3.6V, 4V or 4.2V.

[0173] 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, specifically, it 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, specifically, it can be considered to be 14.4V, 16V or 16.8V.

[0174] In this 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 this embodiment, the number of cell units 13 is 2, and the two cell units 13 are connected in series, then the nominal voltage of the battery pack 100 can be considered to be 7.2V to 8.4V, specifically, it can be considered to be 7.2V, 8V or 8.4V.

[0175] 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 with each other. 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 with each other. When the 4 cell units form two cell groups, similarly, the nominal voltage of the battery pack 100 can 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.

[0176] 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 cell units 13 connected in series. In this case, the nominal voltage of the battery pack 100 can be 10.8V, 12V, or 12.6V. As Figure 6b and 6c shown, multiple cell units 13 are stacked and arranged within the battery pack housing 11. Here, we can define the direction perpendicular to the cell unit 13 as the stacking direction 102 of the multiple cell units 13. That is to say, the multiple cell units 13 are stacked together in sequence along the stacking direction 102. In this embodiment, the stacking direction 102 of the multiple cell units 13 is perpendicular to the direction of the first straight line 101 where the battery pack 100 is coupled to the tool main body 21.

[0177] In this embodiment, the battery pack 100 is detachably connected to the tool main body 21. In fact, in other embodiments, it can be understood that the battery pack can also be a battery pack built into the main body housing, and the battery pack is used to supply power to the motor. The battery pack includes at least one cell unit, and the cell unit is used to store electrical energy. The cell unit is arranged within the holding portion, and the extension plane of the cell unit is parallel to the direction of the first straight line. All the technical solutions in this application that can be applied to the battery pack built into the main body housing can also be applied to the power tool with the built-in battery pack. Details are not described herein again.

[0178] As Figure 3 and Figure 4 shown, the power tool 200a is a hand-held power tool 200a. The main body housing 22 further includes a holding portion 225, and the holding portion 225 is for the user to hold. The holding portion 225 is connected to the accommodating portion 221 and extends along the direction of the first straight line 101 from the accommodating portion 221. The extending direction of the holding portion 225 intersects with the extending direction of the accommodating portion 221. The battery pack 100 is coupled to the holding portion 225 along the extending direction of the holding portion 225. One end of the holding portion 225 is connected to the accommodating portion 221, and the other end forms the above-mentioned slot 224. The slot 224 is arranged within the holding portion 225 and is formed by the holding portion 225. Or rather, the slot walls forming the slot 224 constitute a part of the holding portion 225. When the user holds the power tool 200a, the user's hand will hold on the outer wall of the slot 224. When the battery pack 100 is coupled to the tool main body 21, a part of the battery pack housing 11 is arranged within the slot 224 formed by the holding portion 225, and a part of the cell units 13 are also located within the slot 224 formed by the holding portion 225. In this way, a part of the battery pack 100 is located within the holding portion 225. When the user operates the power tool 200a, a part of the battery pack 100 will be located within the holding space surrounded by the user's palm and fingers.

[0179] It can be understood that, as Figure 1 shown, 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". In this way, when the battery pack 100 is coupled to the holding part, a part of the battery pack 100 is located inside the holding part, which can make the volume of the whole power tool smaller, and the whole power tool is also basically in the shape of the Chinese character "one".

[0180] 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 arranged inside the holding part 225, the holding part 225 is still relatively thin, which is convenient for the user to operate the power tool 200a. Moreover, arranging a part of the battery pack 100 inside the holding part 225 can also make full use of the space inside the holding part 225, thereby reducing the size of the whole power tool 200a, which is beneficial to the miniaturization of the power tool 200a.

[0181] In some embodiments, the nominal voltage of the battery pack can also be less than or equal to 17V.

[0182] 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 at this time, 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. In this way, 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.

[0183] In this way, 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, thus improving the adaptability of the battery pack 100.

[0184] 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.

[0185] 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 9V. In this way, for the low-voltage battery pack 100, the battery pack 100 can provide a smaller volume and greater energy, so as to increase the energy of the battery pack 100 while meeting the requirements of the low-voltage platform of the power tool 200a, thereby increasing the battery life of the battery pack 100. Among them, the volumetric energy density is the ratio of the energy of the battery pack 100 to its volume. The volume of the battery pack 100 can refer to the amount of the 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 discharged when the entire sealed battery pack 100 is immersed in water. It can also be measured by other measurement methods commonly used by those skilled in the art for the volume of the battery pack 100.

[0186] 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 In some embodiments, the gravimetric energy density of the battery pack 100 can be further defined as greater than or equal to 100 mWh / g. The gravimetric energy density is the ratio of the energy of the battery pack 100 to its weight. In this way, the overall weight of the battery pack 100 can be reduced while meeting the requirement that the battery pack 100 provides sufficient battery life.

[0187] 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.

[0188] In this embodiment, the number of the battery cell units 13 included in the battery pack 100 is 2, and 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 3 . In some embodiments, the volume of the battery pack is less than or equal to 130 cm3 。

[0189] 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. In this way, the total capacity of the battery pack 100 is relatively large, which can improve the endurance time of the battery pack 100.

[0190] 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 W / cm³. Here, the ratio of the output power of the battery pack 100 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 cell, which can not only improve the output power of the battery pack 100, but also reduce the volume of the battery pack 100. Thus, the power tool 200a can meet the working power while reducing the volume of the battery pack 100 and increasing the endurance time of the battery pack 100.

[0191] 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.

[0192] As Figure 6b shown is a cross-sectional view of the portion of the battery pack 100 located in the slot 224 of the holding portion 225 in a plane P perpendicular to the direction of the first straight line 101. As Figure 6b shown, the cross-section of the battery pack 100 in the plane P perpendicular to the first straight line 101 has an outer contour 11a, and the outer contour 11a is visible Figure 6b as the bold lines in. Among them, 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 string winding method. The length of the string used to wind around the outer contour 11a once can be defined as the perimeter of the outer contour 11a. It can be understood that those skilled in the art can also use other common methods for measuring the perimeter. In this way, for the handheld power tool 200a, the battery pack 100 is relatively thin, making the battery pack 100 more suitable for insertion into the holding portion 225 without increasing the size of the holding portion 225, so that the space inside the holding portion 225 can be effectively utilized. Especially for the power tool 200a with a relatively small voltage platform, it is desired that the power tool 200a can be small enough in size while meeting the 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.

[0193] As Figure 6bAs shown, the area of the outer contour 11a of the cross-section 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. In this way, the size of the battery pack 100 is small enough for the user to hold comfortably, and at the same time, the size of the battery pack 100 is not too small to facilitate the arrangement of internal components such as the battery cell unit 13 and the circuit board assembly 15. Among them, the area can be measured by the measurement methods commonly used by those skilled in the art, such as the grid method. The grid method is to simulate the outer contour 11a and divide it into several grids, then calculate the area of each grid, and sum up the areas of several grids to approximately obtain 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 approximately estimate the area of the outer contour 11a. In some embodiments, the area of the outer contour of the cross-section 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.

[0194] As Figure 13 As shown is a cross-sectional view of the holding portion 225 and the battery pack 100 located therein in the plane P. The thick line inside the cross-sectional view is the outer contour 11a of the battery pack 100, and the thick line outside is the outer contour 225a of the holding portion 225. In this embodiment, since the size of the outer contour 11a of the cross-section of the battery pack 100 in the plane P is small, the outer contour 225a of the cross-section of the holding portion 225 in the plane P can be designed to be correspondingly small. For example, the perimeter of the outer contour 225a of the cross-section of the holding portion 225 in the 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. It can also make the area of the outer contour 225a of the cross-section of the holding portion 225 in the plane P perpendicular to the first straight line 101 greater than or equal to 13 cm² and less than or equal to 18 cm². In this way, it not only prevents the holding portion 225 from being too thin and reducing the holding contact surface, but also prevents the holding portion 225 from being too thick and causing discomfort in holding. In some embodiments, the perimeter of the outer contour 225a of the cross-section of the holding 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 holding 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 As Figure 6bAs shown, the dimension L1 of the cross-section of the battery pack 100 in the plane P in the width direction perpendicular to the first straight line 101 is greater than or equal to 3.7 cm and less than or equal to 4.7 cm. In this way, the width of the holding part 225 can be made suitable for the user to hold comfortably and stably. The dimension L2 of the cross-section of the battery pack 100 in the 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 2.7 cm and less than or equal to 3.7 cm. Among them, 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 of the cross-section in the width direction to the dimension L2 of the cross-section 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 of the cross-section in the width direction to the dimension L2 of the cross-section in the thickness direction is greater than or equal to 1.2 and less than or equal to 1.5. In this way, the cross-section of the battery pack 100 can be made substantially elliptical, which is convenient for designing the holding part 225 for accommodating the battery pack 100 to be approximately elliptical. In some embodiments, the dimension L1 of the cross-section of the battery pack 100 in the plane P in the width direction perpendicular to the first straight line 101 is greater than or equal to 3.9 cm and less than or equal to 4.5 cm, and the dimension L2 of the cross-section of the battery pack 100 in the 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 2.9 cm and less than or equal to 3.5 cm.

[0195] As Figure 13 shown, the dimension L3 of the cross-section of the holding part 225 in the 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. In this way, the width of the holding part 225 can be made suitable for the user to hold comfortably and stably. The dimension L4 of the cross-section of the holding part 225 in the 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. Among them, 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 of the cross-section in the width direction to the dimension L2 of the cross-section 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 of the cross-section in the width direction to the dimension L2 of the cross-section in the thickness direction is greater than or equal to 1.2 and less than or equal to 1.5. In this way, the cross-section of the holding part 225 can be made substantially elliptical, enabling the user to operate the power tool 200a comfortably, considering the ergonomics of the power tool 200a.

[0196] As Figures 4 to 7bAs shown, the battery cell unit 13 is a pouch-type battery cell, and the pouch-type battery cell extends within the extension plane P2. Alternatively, it can be understood that the plane where the largest surface of the pouch-type battery cell is located is the extension plane P2. The extension plane of the battery cell unit 13 is substantially parallel to the first straight line 101. The extending direction of the holding portion 225 is the first straight line 101, and the dimension of the holding portion 225 in the direction of the first straight line 101 is the largest. Since the plane where the largest surface of the battery cell unit 13 is located is the extension plane, by arranging most of the battery cell unit 13 within the holding portion 225 and making the extension plane and the first straight line 101 substantially coincide, the overall volume formed by the holding portion 225 and the battery pack 100 can be reduced, and the battery cell unit 13 can make full use of the space formed by the holding portion 225 in the direction of the first straight line 101.

[0197] As Figure 7b shown, the battery cell unit 13 is substantially 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. Among them, the length L6 of the battery cell unit 13 is the dimension of the battery cell unit 13 in 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 in the 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.

[0198] As Figures 6a to 12b shown, the circuit board assembly 15 is used to control the charging and discharging of the battery pack 100 and protect the battery pack 100, etc. The circuit board assembly 15 is arranged within the battery pack housing 11. A plurality of electronic components are arranged on the circuit board assembly 15.

[0199] The circuit board assembly 15 includes: a power management board 151. The power management board 151 is used to manage the relationship between the plurality of battery cell units 13, and also control the parameters and processes of the charging and discharging of the battery pack 100. The extension plane of the power management board 151 is arranged substantially parallel to the extension plane of the battery cell unit 13 located within the holding portion 225. In this way, the space on both sides of the battery cell unit 13 can be fully utilized, enabling the power management board 151 and the battery cell unit 13 to make full use of the space within the ellipse.

[0200] The power management board 151 is stacked on the side of the battery cell unit 13 located within the holding portion 225, and the extended plane of the power management board 151 is also parallel to the direction of the first straight line 101 of the holding portion 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 extended plane. In this embodiment, both battery cell units 13 are arranged in parallel with the power management board 151.

[0201] In this embodiment, the battery cell unit 13 that is at least partially located within the holding portion 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 that is closer 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 that is farther from the host interface 223. When the battery pack 100 is combined with the holding portion 225, the first end 13b is located within the holding portion 225, and the second end 13c is located outside the holding portion 225. That is to say, when the battery pack 100 is combined with the holding portion 225, the first end 13b is located within the slot 224, and the second end 13c is located outside the slot 224. And the battery pack interface 12 is provided 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 first enters the slot 224. When the battery pack 100 is inserted to the bottom of the slot 224, the battery pack interface 12 located at the first end 13b can first be connected to the host interface 223 located at the bottom of the slot. Thus, when the battery pack 100 is inserted to the bottom of the slot, a stable connection between the battery pack interface 12 and the host interface 223 is achieved. In this way, not only can the connection between the battery pack 100 and the tool host 21 be made more stable, but also the host interface 223 and the battery pack interface 12 can be protected from interference from the external environment.

[0202] The circuit board assembly 15 further includes: a terminal circuit board 152. The battery pack interface 12 includes at least one terminal of the battery pack 100. For example, the battery pack interface 12 may include: a positive terminal 152a, a negative terminal 152b, and may also include a detection terminal 152c, a communication terminal 152d, etc. The terminal circuit board 152 is used to support and install the terminals of the battery pack 100, that is, to 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 to the battery cell unit 13. In this embodiment, the terminal circuit board 152 is provided at the first end 13b of the first group of battery cells 13a. In this way, the battery pack interface 12 can be conveniently provided at a position of the battery pack 100 close to the bottom of the slot 224, and the size of the battery pack 100 in the direction of the plane P perpendicular to the first straight line 101 can be reduced, which is beneficial to designing a holding portion 225 suitable for users to hold.

[0203] Among them, the terminal circuit board 152 extends substantially along a direction perpendicular to the first straight line 101, so as to make full use of the space at the first end 13b of the first group of battery cells 13a. It can be understood that in other embodiments, the terminal circuit board 152 can also be inclined relative to the first straight line 101.

[0204] In this embodiment, the extension plane P2 of the battery cell unit 13 can be defined as the first plane. The power management board 151 and the terminal circuit board 152 are separately arranged. 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. As we know, the terminals of the battery pack 100 usually have a certain length. Therefore, setting the terminals of the battery pack 100 at the end of the battery cell unit 13 instead of the side can reduce the size of the battery pack 100 in the plane P perpendicular to the first straight line 101 and make full use of the space of the holding part 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 this embodiment, the extension plane of the terminal circuit board 152 is substantially perpendicular to the extension plane of the power management board 151. Among them, the terminal circuit board 152 is located at the end of the battery cell units 13 stacked along the stacking direction 102. In this way, the terminals of the battery pack 100 are located at the ends of the long sides of the rectangle.

[0205] As Figure 6b 、 6c and Figure 10 shown, there are components 151a on the power management board 151, and the components 151a are installed 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 100 mm 3 , and the components 151a are also arranged on the central axis 103 in the length direction or width direction of the power management board 151. The dimension L5 of the components 151a in the direction perpendicular to the extension plane is greater than or equal to 3 mm, where 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 this embodiment, the components 151a are arranged on the central axis 103 in the width direction of the power management board 151. In this way, the bulging space in the middle of the ellipse can be fully utilized, so as to increase the volume energy density of the battery pack 100. In this embodiment, the dimension L5 of the components 151a in the direction perpendicular to the extension plane is greater than or equal to 3 mm, so that the height of the components 151a is relatively high. If the components 151a are installed at other positions on the power management board 151, the size of the battery pack 100 will be larger. The components 151a with a relatively high height can be, for example, capacitors, inductors and other devices.

[0206] As Figures 8 to 12bAs shown, the battery cell support 14 is used to support the battery cell unit 13. In this embodiment, the battery cell support 14 includes a first support portion 141 and a second support portion 142, and the first support portion 141 is disposed on four end faces of the battery cell unit 13.

[0207] The first support portion 141 forms a battery cell accommodation cavity 112 around the four end faces of the battery cell unit 13. One side of the battery cell accommodation cavity 112 is open to improve the heat dissipation effect of the battery cell unit 13, and the second support portion 142 is disposed on the other side of the battery cell accommodation cavity 112.

[0208] The second support portion 142 is disposed at one side surface of the battery cell unit 13. The first support portion 141 includes a terminal board support portion 141a disposed at the first end 13b of the battery cell unit 13, and the outer side of the terminal board support portion 141a away from the battery 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 battery cell unit 13, and the outer side of the second support portion 142 is used to mount the power management board 151. A groove 142a and a clamping portion 142b may be formed on the outer side of the second support portion 142. The groove 142a is used to accommodate at least a part of the power management board 151, and the clamping portion 142b is used to fix the power management board 151. A detection device 151b is further disposed on one side of the power management board 151 close to the second support portion 142, and the detection device 151b and the above-mentioned components 151a are respectively disposed on different side surfaces of the power management board 151. The detection device 151b is used to detect the temperature of the battery cell unit 13, and the detection device 151b is disposed on the side of the power management board 151 close to the battery cell unit 13 so that the temperature detection is more accurate. The second support portion 142 is further provided with a through hole 142c, and the through hole 142c enables the spaces on both sides of the second support portion 142 to communicate with each other. The detection device 151b is disposed at a position on the power management board 151 opposite to the position of the through hole 142c. The detection device 151b may be located in the through hole 142c, and even may pass through the through hole 142c and be located on the side of the second support portion 142 close to the battery cell unit 13, so that the distance between the detection device 151b and the surface of the battery cell unit 13 is closer. For example, the detection device 151b may be disposed in contact with the surface of the battery cell unit 13, so that the temperature of the battery cell unit 13 can be detected more accurately.

[0209] Such as Figure 3 、 Figure 8 and Figure 9As shown, the battery pack housing 11 includes a first housing part 111 and a second housing part 112. The first housing part 111 and the second housing part 112 are detachably connected along the direction of the first straight line 101. This facilitates the installation of the battery pack 100. The first housing part 111 forms a first cylindrical part 111a. The first cylindrical part 111a extends along the direction of the first straight line 101. One end of the first cylindrical part 111a close to the second housing part 112 is open, and the terminals of the battery pack 100 are arranged at the end of the first cylindrical part 111a far from the second housing part 112. The end part of the first cylindrical part 111a far from the second housing part 112 is partially closed and forms a through hole 142c allowing the tool terminals or the terminals of the battery pack 100 to pass through. The second housing part 112 forms a second cylindrical part 112a. After the second cylindrical part 112a is butted against the first cylindrical part 111a, a battery cell accommodation cavity 112 for accommodating the battery cell unit 13 is formed. One end of the second cylindrical part 112a close to the first cylindrical part 111a is open, and the other end is at least partially closed. Among them, the dimension of the first housing part 111 in the direction of the first straight line 101 is also larger than the dimension of the second housing part 112 in the direction of the first straight line 101.

[0210] A locking structure 112b is further formed on the outer wall of the second cylindrical part 112a. The locking structure 112b is adapted to the mating structure 226 on the main body housing 22 so that when the battery pack 100 is combined with the main body housing 22, the battery pack 100 can be locked, thereby preventing the battery pack 100 from detaching from the power tool 200a due to vibration and ensuring the stability of the connection between the battery pack interface 12 and the tool interface. Specifically, the locking structure 112b is a buckle.

[0211] As Figure 2 , Figure 5 and Figure 8 shown, the battery pack 100 further includes: a power quantity display component 161 and a first interface 162. The first interface 162 is used to connect an external charging device so that the external charging device charges the power tool 200a. The power quantity display component 161 is used to display the remaining power quantity of the battery pack 100. Both the power quantity display component 161 and the first interface 162 are arranged on the side of the power management board 151 far from the battery cell unit 13. Among them, the first interface 162 is also arranged such that the charging device is combined with the first interface 162 along a direction parallel to the power management board 151 and perpendicular to the first straight line 101.

[0212] The first interface 162 is at least partially arranged in the battery pack housing 11, specifically arranged in the second housing part 112. When the battery pack 100 is combined with the tool main body, the first interface 162 is located outside the main body housing. In this way, the user can charge the battery pack 100 without detaching the battery pack 100. In this embodiment, when the battery pack 100 is combined with the holding part 225, the first interface 162 is located outside the holding part 225.

[0213] Among them, the first interface 162 is a USB charging interface. The USB charging interface can not only be used for charging, but also output electricity to supply power to other electrical devices. In some embodiments, the first interface 162 is a type-c interface. Setting the first interface 162 as a type-c interface enables the battery pack 100 to adapt to more types of charging devices. The charging device can be a dedicated charger manufactured by the manufacturer of the battery pack 100 and matching 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-type battery cell, so that the battery pack 100 has a relatively large volume energy density. Thus, the battery pack 100 can not only supply power to the power tool 200a, but also enable the battery pack 100 to have a long enough battery life to charge other electrical devices. That is to say, the first interface 162 can also output electricity to enable the battery pack 100 to supply power to other electrical devices.

[0214] Such as Figure 14 The charging combination 300 shown includes: a battery pack 100 and a first charger 31. Among them, the battery pack 100 is the Figures 1 to 3 battery pack 100 in. The first charger 31 is adapted to 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.

[0215] In some embodiments, the first charger 31 is a common type-c universal charger on the market, and the type-c universal charger can charge a mobile phone. The charging power of the first charger 31 is less than or equal to 15W.

[0216] Or, in some embodiments, the charging power of the first charger 31 is greater than or equal to 15W. Or, the charging power of the first charger 31 is greater than or equal to 18W. In this way, the charging time of the battery pack 100 can be shortened.

[0217] When the battery pack 100 is installed on the tool main body 21, the first interface 162 is also set to allow access to electric energy to charge the battery pack 100. That is, when the battery pack 100 is installed on the tool main body 21, the first charger 31 can charge the battery pack 100. In this way, the user does not need to unplug the battery pack 100 to directly charge the battery pack 100 through the first charger 31. Or, when the power tool 200a is running, the first interface 162 allows access to electric energy to charge the battery pack 100. In this way, the user can directly charge the non-removable battery pack 100, and the effect of charging and using the battery pack 100 simultaneously can be achieved.

[0218] In some embodiments, the battery pack interface 12 can also be set as a charging interface to connect to an external charging device through it to charge the battery pack 100. As Figure 14 shown, the charging assembly 300 further includes a second charger 32. The second charger 32 includes a second charging interface 321 detachably connected to the battery pack interface 12 to charge the battery pack 100. That is to say, the battery pack interface 12 can be set to output power to charge the power tool 200a, and is also configured to access power to charge the cell unit 13. The charging power of the battery pack interface 12 is greater than or equal to 30W.

[0219] The second charger 32 forms a charging engaging portion 322. The battery pack 100 can be engaged with the charging engaging portion 322. The charging engaging portion 322 is further configured with a charging terminal 323 connected to the terminal of the battery pack 100. The charging engaging portion 322 can be a structure similar to the slot 224 of the above-mentioned holding portion 225. In this way, when the battery pack 100 is engaged with 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.

[0220] As Figure 14 and Figure 15 shown, the charging assembly 300 can further include a controller 33. In this embodiment, the controller 33 is disposed in the battery pack 100. The controller 33 is configured to prevent power from being accessed through the battery pack interface 12 when the first charger 31 is connected to the battery pack 100. That is to say, when the first charger 31 charges the battery pack 100, the second charger 32 is prevented from charging the battery pack 100.

[0221] In other embodiments, the controller 33 can also be configured to prevent power from being accessed through the first interface 162 when the second charger 32 is connected to the battery pack 100. That is to say, when the second charger 32 charges the battery pack 100, the first charger 31 is prevented from charging the battery pack 100.

[0222] In some other embodiments, the charging assembly 300 can only include the battery pack 100 and the above-mentioned first charger 31. That is to say, the battery pack 100 can only be charged by the first charger 31.

[0223] As Figure 16 shown, another battery pack 400. This battery pack 400 is substantially the same as the Figure 5 shown battery pack 100, and the main difference is that it is further provided with a wireless charging device 401. Other Figure 5The structures of the battery pack 100 adapted to this embodiment can all be applied to this embodiment, and will not be elaborated here. The following mainly introduces the differences between this embodiment and Figure 5 the embodiment shown.

[0224] As Figure 16 shown to Figure 19 shown, the wireless charging device 401 is used to access power to charge the battery cell unit 403, and it includes: a receiving coil 402, and the receiving coil 402 is arranged at one end of the stacked multiple battery cell units 403 away from the battery pack interface 404, that is, the receiving coil 402 is arranged at the second end of the first group of battery cells 405. The receiving coil 402 is electrically connected to the power management board 406.

[0225] As Figure 17 shown, it is another charging combination 45 formed by the battery pack 400 and the wireless charging device 43. The wireless charging device 401 is connected to the power management board 406, and the wireless charging device 401 cooperates with the wireless charging device 43 so that the wireless charging device 43 charges the battery cell unit 403.

[0226] 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, and the transmitting coil 433 is matched with the receiving coil 402, and the transmitting coil 433 and the receiving coil 402 can achieve energy transfer. The power interface 432 is used to connect to an external power device. For example, the power interface 432 can be connected to the municipal power grid. The maximum charging power of the wireless charging device 401 is less than or equal to 15W. In this way, the battery pack 400 of this embodiment can be charged by a 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 this embodiment. In this way, when the user purchases the battery pack 400 of this embodiment, they do not need to purchase a wireless charging device 43 separately, but can use the existing wireless charging device 43 at home to charge the battery pack 400, reducing the user's usage cost.

[0227] The transmitting coil and the receiving coil can be designed into various different shapes according to the space inside the battery pack housing. For example, they can be circular, oval, rectangular, etc. Or, in this embodiment, the battery pack housing is generally oval, and correspondingly, the transmitting coil and the receiving coil can also be set to be oval correspondingly, so as to make better use of the space inside the battery pack housing. In some embodiments, the maximum charging power of the wireless charging device 401 is greater than or equal to 15W. In this way, the battery pack 400 can be quickly charged. The user can purchase a dedicated wireless charging device 43 for charging, and the power of the wireless charging device 43 for charging the battery pack 400 is greater than or equal to 20W.

[0228] In the battery pack 400 of another embodiment, the battery pack 400 is substantially the same as the Figure 16 battery pack 400 shown, with the main difference being that the battery cell unit 403 is a cylindrical battery cell. In this way, the wireless charging device 401 can cooperate with the wireless charging device 43 to charge the cylindrical battery cell.

[0229] As Figure 17 and Figure 18 shown, the battery pack 400 includes a positioning structure 407 that can position it to the charging position of the wireless charging device 43. In this embodiment, the positioning structure 407 can be a first magnetic attraction device 408, and the corresponding wireless charging device 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 adsorbed at the charging position, facilitating the user to accurately position the battery pack 400 and ensuring the stability of charging.

[0230] As Figure 19 shown, an external fan 44 can also be adsorbed through the first magnetic attraction device 408. The external fan 44 can cooperate with the air duct structure on the battery pack 400 to dissipate heat from the battery pack 400. A third magnetic attraction device 441 that cooperates with the first magnetic attraction device 408 is provided in the external fan 44.

[0231] In some embodiments, the positioning structure can also be a buckle structure, and the battery pack is positioned to the charging position of the wireless charging device through the buckle structure.

[0232] In some embodiments, the positioning structure can also be specific positioning protrusions or grooves on the surface of the battery pack, and the corresponding wireless charging device is provided with corresponding positioning grooves or protrusions. The battery pack is positioned at the charging position through the cooperation of the protrusions and the grooves.

[0233] In some embodiments, the positioning structure can also be the shape formed on the surface of the battery pack itself, and the wireless charging device is formed with a corresponding matching shape that can cooperate with the shape to position the battery pack to the charging position.

[0234] As Figure 20 shown, another charging combination 500 includes a first battery pack 501, a second battery pack 502, and a wireless charging device 503. The first battery pack 501 can be the same as the Figure 16 battery pack in, and it includes a first battery cell unit and a first wireless charging device that can charge the first battery cell unit. The first battery cell unit is a pouch-shaped battery cell, and its specific structure will not be described in detail. The second battery pack 502 can also be the same as the Figure 16is the same as the battery pack therein, which 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-type battery cell, and its specific structure will not be elaborated here. The wireless charging device 503 is configured 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 packs 501 can be fully charged first, and then the other can be charged, facilitating the user to use the first battery pack 501 in a timely manner.

[0235] In some embodiments, the wireless charging device 503 can also charge the first battery pack 501 and the second battery pack 502 simultaneously. In this way, when some tool hosts that require the use of two battery packs are working, the first battery pack 501 and the second battery pack 502 can be used in a timely manner. Or, when two tool hosts need to work, the first battery pack 501 and the second battery pack 502 can be used separately in a timely manner.

[0236] In some embodiments, the wireless charging device 503 can also first charge the battery pack with a lower power level among the first battery pack 501 and the second battery pack 502, and then, when the battery pack with a lower power level is charged to the same power level as the other battery pack, charge the first battery pack 501 and the second battery pack 502 simultaneously.

[0237] In this embodiment, both the first battery cell unit and the second battery cell unit are pouch-type battery cells. In other embodiments, the first battery cell unit can be a pouch-type battery cell while the second battery cell unit is a cylindrical battery cell. Or, in other embodiments, both the first battery cell unit and the second battery cell unit are cylindrical battery cells.

[0238] In this 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.

[0239] In this 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, which enable the first battery pack 501 and the second battery pack 502 to be charged at any position within a charging area of the wireless charging device 503 instead of being placed at a specific position, thus improving the charging convenience.

[0240] In a power tool according to another embodiment, the power tool includes: a tool main body, a first battery pack, and a second battery pack. The tool main body includes: an output member, a motor, a first tool interface, and a second tool interface. The output member is used to output power, and the motor is used to drive the output member to move. The first tool interface is used for detachably connecting with the first battery pack, and the second tool interface is used for detachably connecting 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 described in detail. The second battery can be the battery pack in Figure 5 or Figure 16 , and the specific structure will not be described in detail. In this embodiment, the first battery pack includes: a first battery pack housing and a first battery cell unit, and the first battery cell unit is disposed in the first battery pack housing. The second battery pack includes a second battery pack housing and a second battery cell unit in the second battery pack housing. The first battery cell unit is a pouch-type battery cell, and the second battery cell unit is a pouch-type battery cell. This enables the volume energy density of both the first battery pack and the second battery pack to be set relatively high. Thus, the endurance of the power tool is improved.

[0241] As shown in Figure 21 and Figure 25 , the present application also provides another battery pack 600 applicable to the tool main body 600a. This battery pack 600 can be adapted to the same tool main body 21 as the battery pack 100 in Figure 5 . The main difference lies in the different number of battery cell units 601 contained in the battery pack 600. 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 form a first group of battery cells 602, also called a 1P group of battery cells. While the number of battery cell units 601 contained in the battery pack 600 in this embodiment is 4. The 4 battery cell units 601 form a 2P battery cell group. Here, two battery cell units 601 identical to the battery cell units 601 in Figure 5 can be 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 this 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 form a 2P battery cell group. Or, 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. In this way, it can also be considered that the 4 battery cell units 601 form a 2P battery cell group.

[0242] In this embodiment, when the battery pack 600 is coupled to the tool main body 600a, at least a part of the first set of battery cells 602 is disposed within the grip portion 604, and the second set of battery cells 603 is located outside the grip portion 604.

[0243] For ease of description, in this embodiment, the battery cell unit 601 in the first set of battery cells 602 can also be defined as the first battery cell unit 605, and the battery cell unit 601 in the second set of battery cells 603 as the second battery cell unit 606. Among them, both the first battery cell unit 605 and the second battery cell unit 606 are pouch-type battery cells. The first battery cell unit 605 is partially or entirely located within the grip portion 604, and the second battery cell unit 606 is located outside the grip portion 604. The extension of the first battery cell unit 605 is parallel to the first straight line 607. The extension plane of the second battery cell unit 606 is perpendicular to the first straight line 607. The extension plane of the second battery cell unit 606 is perpendicular to the extension plane of the first battery cell unit 605. The arrangement of the circuit board assembly 608 and the first set of battery cells 602 is the same as that of the battery pack 100 in Figure 5 . The main difference is that the second set of battery cells 603 is vertically disposed at the first end of the first set of battery cells 602 away from the battery pack interface 609.

[0244] The battery pack housing 610 includes: a first housing portion 611 and a second housing portion 612. The first housing portion 611 is the same as the battery pack 100 in Figure 3 . The first housing portion 611 and the second housing portion 612 form a 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 docked to form a receiving space for the second set of battery cells 603. The battery pack housing 610 is generally 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 generally in the shape of the letter "L".

[0245] As shown in Figure 26 , it can be understood that in some embodiments, the first set of battery cells 701 and the second set of battery cells 702 can also be arranged along the direction of the first straight line 703, that is, the second battery cell unit 704 is disposed below the first battery cell unit 705.

[0246] As shown in Figure 27 for another battery pack 800, this battery pack 800 is substantially the same as the battery pack 100 shown in Figure 5 , the main difference being that an additional wireless discharging device 801 is provided. Other structures of the battery pack 100 in Figure 5 that are adapted to this embodiment can be applied to this embodiment. The same parts will not be described in detail hereinafter. The differences between this embodiment and the embodiment shown in Figure 5 will be mainly introduced below.

[0247] As shown Figure 27 in FIG. 1, the wireless discharge device 801 is used for discharging, and includes: a transmitting coil 802, which is disposed at one end of a plurality of stacked battery cell units 803 away from the battery pack interface 804, that is, the transmitting coil 802 is disposed at the second end of the first group of battery cells 805. The transmitting coil 802 is electrically connected to the power management board 806.

[0248] As shown Figure 28 in FIG. 2, a discharge combination 85 is formed by the battery pack 800 and the electrical device 800a. At this time, the battery pack 800 can be used as a charger for charging the electrical device 800a, or as a power source for supplying power to the electrical device 800a. The wireless discharge device 801 is connected to the power management board 806, and the wireless discharge device 801 cooperates with the electrical device 800a to enable the battery pack 800 to charge or supply power to the electrical device 800a. The electrical device 800a can be, for example, a mobile phone, and the battery pack 800 can charge the mobile phone in a wireless charging manner. Alternatively, the electrical device can also be a lighting lamp, and the battery pack can supply power to the lighting lamp in a wireless power supply manner. In this way, when the user is outdoors without an AC power source, the battery pack can be used to supply power to the lighting lamp in a timely manner.

[0249] The electrical device 800a includes: a power receiving module. The power receiving module is used to cooperate with the wireless discharge device 801. Specifically, the power receiving module includes a receiving coil, and the receiving coil is matched with the transmitting coil 802, and the receiving coil and the transmitting coil 802 can achieve energy transfer. In this way, the battery pack 800 of the present embodiment can charge electrical devices in daily life such as common mobile phones and watches on the market. For users, the battery pack 800 that can supply power to power tools can also charge or supply power to devices such as mobile phones in a wireless charging manner, which brings convenience to the user's work and life and also saves costs.

[0250] The maximum discharge power of the wireless discharge device 801 is less than or equal to 15W. In this way, the battery pack 800 of the present embodiment can charge most of the electrical devices on the market that can be charged by wireless charging.

[0251] In some embodiments, the maximum discharge power of the wireless discharge device is greater than 15W. In this way, the battery pack can quickly charge the electrical device and improve the charging speed.

[0252] As shown Figure 28As shown, the battery pack 800 further includes a bracket 800b. The bracket 800b can be used to support the electrical device 800a, so that the electrical device 800a can better contact with the battery pack 800 or better align the power receiving module of the electrical device 800a with the wireless discharging device 801 of the battery pack 800a. The bracket 800b can have Figure 27 the storage state shown, and Figure 28 the working state shown.

[0253] As Figure 29 shown, another battery pack 900, this battery pack 900 is basically the same as the Figure 27 battery pack 800 shown, the main difference is that it has a wireless charging and discharging device 901. Other Figure 27 structures of the battery pack 800 adapted to the present embodiment in Figure 27 can be applied to the present embodiment, and the same parts will not be described in detail. The following mainly introduces the different parts between the present embodiment and the Figure 27 embodiment shown. Briefly speaking, in the present embodiment, after changing the wireless discharging device 801 of the Figure 27 battery pack 800 shown to the wireless charging and discharging device 901 of the present embodiment, the battery pack 900 of the present embodiment is formed.

[0254] The wireless charging and discharging device 901 can not only enable the battery pack 900 to be charged by the wireless charging device 93, but also enable the battery pack 900 to charge or supply power to the electrical device 900a. The wireless charging and discharging device 901 can have a charging mode and a discharging mode. When the battery pack 900 needs to be charged, the wireless charging and discharging device 901 can switch to the charging mode, and at this time, the battery pack 900 can be charged by the wireless charging device 93. When the wireless charging and discharging device 901 switches to the discharging mode, the electrical device 900a can be charged by the battery pack 900.

[0255] It should be noted that Figure 16 the battery cell unit 403 in Figure 27 the battery cell unit 803 in Figure 29 and the battery cell unit 903 included in Figures 1 to 15 all have the same structure, size, arrangement, function, performance, parameters, etc. as the battery cell unit 103 in the Figures 1 to 15 embodiment shown, and they are all pouch-type battery cells, which will not be described in detail.

[0256] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form. Any technical solutions obtained by using equivalent replacements or equivalent transformations fall within the protection scope of the present application.

Claims

1. A battery pack suitable for an electric tool, comprising: A battery pack housing, formed with a coupling portion for connecting to the electric tool, wherein the battery pack is detachably connected to the electric tool via the coupling portion; A battery cell unit, used for storing electric energy, wherein the battery cell unit is arranged in a battery pack shell; A power management board, used to control the battery pack, wherein the power management board is disposed in the battery pack housing; A battery pack interface, connected to the electric tool to provide power to the electric tool; A wireless charging device, configured to cooperate with a wireless charging device to charge the battery cell unit; Wherein, the battery cell unit is a bag-shaped battery cell, and the wireless charging device is connected to the power management board.

2. The battery pack for electric tools according to claim 1, characterized in that: The maximum charging power of the wireless charging device is less than or equal to 15W.

3. The battery pack for electric tools according to claim 1, characterized in that: The maximum charging power of the wireless charging device is greater than 15W.

4. The battery pack for electric tools according to claim 1, characterized in that: The number of the battery cell units includes a plurality, and the plurality of battery cell units are stacked. The wireless charging device includes a receiving coil, and the receiving coil is at least partially arranged at the ends of the plurality of stacked battery cell units.

5. The battery pack for electric tools according to claim 4, characterized in that: The battery pack interface is arranged at the other end of the plurality of battery core units which are stacked.

6. A charging assembly, comprising a battery pack and a wireless charging device configured to charge the battery pack, wherein the battery pack comprises: Battery pack housing; The battery cell unit is arranged in the battery pack shell; A power management board, disposed in the battery pack housing; a battery pack interface, configured to be connected to an electric tool to provide power to the electric tool; A wireless charging device, configured to cooperate with a wireless charging device to charge the battery cell unit, Among them, the battery pack can be detachably combined with an electric tool to power the electric tool, the battery cell unit is a bag-shaped battery cell, the wireless charging device includes a power output module that cooperates with the wireless charging device, and the power of the wireless charging device to charge the battery pack is greater than or equal to 15W.

7. A battery pack suitable for an electric tool, comprising: A battery pack housing having a coupling portion for connecting to the electric tool; The battery cell unit is arranged in the battery pack shell; A power management board, disposed in the battery pack housing; A battery pack interface, connected to the electric tool to provide power to the electric tool; A wireless charging device, configured to cooperate with a wireless charging device to charge the battery cell unit, Wherein, the wireless charging device is connected to the power management board, and the battery pack interface is also configured to be detachably connected to a charger so that the charger can charge the battery cell unit.

8. The battery pack for electric tools according to claim 7, characterized in that: The charging power of the battery pack interface is greater than or equal to 30W, and the maximum charging power of the wireless charging device is greater than 15W.

9. The battery pack for electric tools according to claim 7, characterized in that: The battery cell unit is a bag-shaped battery cell.

10. The battery pack for electric tools according to claim 7, characterized in that: The battery cell unit is a cylindrical battery cell.

11. A charging combination, a battery pack, a first charging device and a second charging device, wherein the battery pack comprises: Battery pack housing; A battery cell unit, arranged in the battery pack shell; A battery pack interface, configured to be connected to an electric tool to provide power to the electric tool; A wireless charging device, used to access power to charge the battery cell unit; The first charging device includes a power output module that cooperates with the wireless charging device, and the second charging device includes a second charging interface that is detachably connected to the battery pack interface, and the battery pack interface includes a positive terminal and a negative terminal.

12. A battery pack suitable for an electric tool, comprising: A battery pack housing having a coupling portion for connecting to the electric tool; The battery cell unit is arranged in the battery pack shell; A power management board, disposed in the battery pack housing; A battery pack interface, connected to the electric tool to provide power to the electric tool; A wireless charging device, configured to cooperate with a wireless charging device to charge the battery cell unit; A USB charging interface, configured to be connected to a charger to charge the battery unit; Wherein, the wireless charging device is connected to the power management board.

13. The battery pack for electric tools according to claim 12, characterized in that: The USB interface is also configured to enable the battery pack to output power to other power-consuming devices.

14. The battery pack for electric tools according to claim 12, characterized in that: The battery cell unit is a bag-shaped battery cell.

15. The battery pack for electric tools according to claim 12, characterized in that: The battery cell unit is a cylindrical battery cell.

16. A battery pack suitable for an electric tool, comprising: A battery pack housing, formed with a coupling portion for connecting to the electric tool, wherein the battery pack is detachably connected to the electric tool via the coupling portion; A battery cell unit, used for storing electric energy, wherein the battery cell unit is arranged in a battery pack shell; A power management board, used to control the battery pack, wherein the power management board is disposed in the battery pack housing; A battery pack interface, connected to the electric tool to provide power to the electric tool; A wireless discharge device, configured to cooperate with an electrical device to charge or supply power to the electrical device; Wherein, the battery cell unit is a bag-shaped battery cell, and the wireless discharge device is connected to the power management board.

17. A battery pack suitable for an electric tool, comprising: A battery pack housing, formed with a coupling portion for connecting to the electric tool, wherein the battery pack is detachably connected to the electric tool via the coupling portion; A battery cell unit, used for storing electric energy, wherein the battery cell unit is arranged in a battery pack shell; A power management board, used to control the battery pack, wherein the power management board is disposed in the battery pack housing; A battery pack interface, connected to the electric tool to provide power to the electric tool; A wireless charging and discharging device, configured to selectively cooperate with an electric device to charge or supply power to the electric device or cooperate with a wireless charging device to enable the wireless charging device to charge the battery cell unit; Wherein, the battery cell unit is a bag-shaped battery cell, and the wireless charging and discharging device is connected to the power management board.

18. The battery pack for electric tools according to claim 17, characterized in that: The wireless charging and discharging device has a charging mode and a discharging mode. When the wireless charging and discharging device is in the charging mode, the battery pack is charged by the wireless charging device. When the wireless charging and discharging device is in the discharging mode, the battery pack charges or supplies power to the power-consuming device.

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