Electric tool

Abstract

The invention discloses an electric tool which comprises a tool main machine, a power source, a power source and a power source. And a battery pack. The tool host comprises a host interface, and the battery pack comprises a battery pack body matched with the host interface. The battery pack further comprises a battery pack shell; and the battery cell unit is arranged in the battery pack shell and is electrically connected with the battery pack interface. The host housing comprises: a motor housing part for accommodating at least part of the motor; and the holding part is used for being held by a user. The battery cell unit is a bag-shaped battery cell, when the battery pack is combined to the tool main machine, at least part of the battery cell unit is located in the holding part, the battery pack is combined to the holding part in the first straight line direction, and the perimeter of the outer contour of the section, in a plane perpendicular to a first straight line, of the part, located in the holding part, of the battery pack is larger than or equal to 10 cm and smaller than or equal to 14 cm; the ratio of the output power of the battery pack to the volume of the battery pack is greater than or equal to 1W / cm. The electric tool is long in endurance time and small in size.

Description

Technical Field

[0001] The present application relates to the field of tools, and in particular to an electric tool. Background Art

[0002] The electric tools in the related art usually include a tool host and a battery pack. The existing tool hosts usually include high-voltage platform electric tools and low-voltage platform electric tools. Among them, the energy density of the battery pack in the low-voltage platform electric tools is low, which makes the battery life of these electric tools short, and the electric tools are large in size, which is inconvenient for users to operate.

[0003] This section provides background information related to the present application which is not necessarily prior art. Summary of the invention

[0004] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide an electric tool with a long battery life and convenient operation for users.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions: A power tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack for being detachably connected to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface cooperating with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, the battery pack further comprises: a battery pack housing; a battery cell unit arranged in the battery pack housing and electrically connected to the battery pack interface; the host housing comprises: a motor housing portion for accommodating at least part of the motor; a grip portion for being gripped by a user; wherein the battery cell unit is a bag-shaped battery cell, when the battery pack is coupled to the tool host, at least part of the battery cell unit is located in the grip portion, the battery pack is coupled to the grip portion along a first straight line direction, the perimeter of the outer contour of the cross-section of the portion 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 volume energy density of the battery pack is greater than or equal to 100 mWh / cm 3 .

[0006] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack for being detachably connected to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface cooperating with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit arranged in the battery pack housing and electrically connected to the battery pack interface; the host housing comprises: a motor housing portion for accommodating at least part of the motor; a grip portion for being gripped by a user; wherein, when the battery pack is coupled to the tool host, at least part of the battery cell unit is located in the grip portion, the battery pack is coupled to the grip portion along a first straight line direction, the perimeter of the outer contour of the cross-section of the portion 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.

[0007] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack for being detachably connected to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that cooperates with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged in the battery pack housing and electrically connected to the battery pack interface; the host housing comprises: a motor housing portion for accommodating at least part of the motor; a grip portion for being gripped by a user; wherein the battery cell unit is a bag-shaped battery cell, when the battery pack is coupled to the tool host, at least part of the battery cell unit is located in the grip portion, the battery pack is coupled to the grip portion along a first straight line direction, the cross-sectional area of ​​the portion 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.

[0008] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V.

[0009] In some embodiments, the number of battery cell units in the battery pack housing is greater than or equal to 2.

[0010] In some embodiments, the extension plane of the pouch-shaped battery cell is substantially parallel to the first straight line.

[0011] 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.

[0012] In some embodiments, the volume energy density of the battery pack is greater than or equal to 120 mWh / cm 3 .

[0013] In some embodiments, an area of ​​a 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.

[0014] In some embodiments, the gravimetric energy density of the battery pack is greater than or equal to 110 mWh / g.

[0015] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack for being detachably connected to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface cooperating with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, the battery pack further comprises: a battery pack housing; a battery cell unit arranged in the battery pack housing and electrically connected to the battery pack interface; the host housing comprises: a motor housing portion for accommodating at least part of the motor; a grip portion for being gripped by a user; wherein the battery cell unit is a bag-shaped battery cell, when the battery pack is coupled to the tool host, at least part of the battery cell unit is located in the grip portion, the battery pack is coupled to the grip portion along a first straight line direction, the cross-sectional area of ​​the portion 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 volume energy density of the battery pack is greater than or equal to 100 mWh / cm 3 .

[0016] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack for being detachably connected to the host housing to power the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that cooperates with the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged in the battery pack housing and electrically connected to the battery pack interface; the host housing comprises: a motor housing portion for accommodating at least part of the motor; a grip portion for being gripped by a user; wherein, when the battery pack is coupled to the tool host, at least part of the battery cell unit is located in the grip portion, the battery pack is coupled to the grip portion along a first straight line direction, the cross-sectional area of ​​the portion 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 weight energy density of the battery pack is greater than or equal to 100 mWh / g.

[0017] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack for detachably connecting to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface cooperating with the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit arranged in the battery pack housing and electrically connected to the battery pack interface; the host housing comprises: a motor housing portion for accommodating at least part of the motor; a grip portion for being gripped by a user; wherein, when the battery pack is coupled to the tool host, at least part of the battery cell unit is located in the grip portion, the battery pack is coupled to the grip portion along a first straight line direction, the cross-sectional area of ​​the portion 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 bag-shaped battery cell.

[0018] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V.

[0019] In some embodiments, the number of battery cell units in the battery pack housing is greater than or equal to 2.

[0020] In some embodiments, the nominal voltage of the battery pack is less than or equal to 9V.

[0021] In some embodiments, the extension plane of the battery cell unit located in the grip portion is substantially parallel to the first straight line direction.

[0022] In some embodiments, the cross-sectional area of ​​the gripping 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.

[0023] In some embodiments, a 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.

[0024] In some embodiments, a 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.

[0025] 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 7Wh and less than or equal to 9Wh.

[0026] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack for being detachably connected to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that cooperates with the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged in the battery pack housing and electrically connected to the battery pack interface; the host housing comprises: a motor housing portion for accommodating at least part of the motor; a grip portion for being gripped by a user; wherein, when the battery pack is coupled to the tool host, at least part of the battery cell unit is located in the grip portion, the battery pack is coupled to the grip portion along a first straight line direction, the width of a cross section of a portion of the battery pack located in the grip portion in a plane perpendicular to the first straight line is greater than or equal to 3.7 cm and less than or equal to 4.7 cm, and 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 bag-shaped battery cell.

[0027] An electric tool comprises: a tool host, including an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack for supplying power to the motor; wherein the battery pack also comprises: at least one battery cell unit, configured to store energy; the host housing comprises: a motor housing portion for accommodating at least part of the motor; a grip portion for being gripped by a user; wherein at least part of the battery cell unit is located in the grip portion, the grip portion extends in the direction of a first straight line, an extension plane of the battery cell unit is parallel to the first straight line, an area of ​​a 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, and the battery cell unit is a bag-shaped battery cell.

[0028] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack for being detachably connected to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that cooperates with the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged in the battery pack housing and electrically connected to the battery pack interface; the host housing comprises: a motor housing portion for accommodating at least part of the motor; a grip portion for being gripped by a user; wherein, when the battery pack is coupled to the tool host, at least part of the battery cell unit is located in the grip portion, the battery pack is coupled to the grip portion along a first straight line direction, the perimeter of the outer contour of the cross-section of the portion 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 battery cell unit is a bag-shaped battery cell.

[0029] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V.

[0030] In some embodiments, the number of battery cell units in the battery pack housing is greater than or equal to 2.

[0031] In some embodiments, the nominal voltage of the battery pack is less than or equal to 9V.

[0032] In some embodiments, the extension plane of the battery cell unit located in the grip portion is substantially parallel to the first straight line direction.

[0033] In some embodiments, a perimeter of an outer contour of a cross section of the gripped 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.

[0034] In some embodiments, a 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.

[0035] In some embodiments, a 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.

[0036] 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 7Wh and less than or equal to 9Wh.

[0037] 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 host, the first group of battery cells is at least partially disposed within the grip portion, and the second group of battery cells is located outside the grip portion.

[0038] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack, which is detachably connected to the host housing to power the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that matches the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged in the battery pack housing and is electrically connected to the battery pack interface; the host housing comprises: a motor housing portion, which is used to accommodate at least part of the motor; a grip portion, which is used for a user to grip and extends substantially along a first straight line; the battery cell unit is a bag-shaped battery cell, and when the battery pack is coupled to the tool host, at least part of the battery cell unit is located in the grip portion, and the extension plane of at least part of the battery cell unit located in the grip 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.

[0039] In some embodiments, the battery pack further includes: a power management board, wherein an extension plane of the power management board is substantially parallel to an extension plane of the battery cell unit at least partially located in the grip portion.

[0040] In some embodiments, the battery pack further includes: a power management board, which is stacked to a side of the battery cell unit at least partially located in the grip portion.

[0041] In some embodiments, the battery cell units at least partially located in the grip portion are defined as a first group of battery cells. Along a first straight line 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 arranged at the first end.

[0042] 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, and the terminal circuit board is disposed at the first end.

[0043] In some embodiments, the terminal circuit board extends substantially in a direction perpendicular to the first straight line.

[0044] In some embodiments, the number of battery cell units at least partially located in the grip portion is 2.

[0045] In some embodiments, a battery cell unit at least partially located within the holding portion is defined as a first group of battery cells, and the battery pack also includes a second battery cell unit located outside the holding portion when the battery pack is coupled to the tool host, the second battery cell unit is a bag-shaped battery cell, and an extension plane of the second battery cell unit is substantially perpendicular to an extension plane of the battery cell unit.

[0046] In some embodiments, the battery cell units at least partially located in the holding portion are defined as a first group of battery cells, and the battery pack also includes a plurality of second battery cell units located outside the holding portion when the battery pack is combined with the tool host, the plurality of second battery cell units are bag-shaped 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.

[0047] An electric tool comprises: 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 accommodating at least part of the motor; a battery pack for supplying power to the motor; wherein the battery pack also comprises: at least one battery cell unit configured to store energy; the main body housing comprises: a motor housing portion for accommodating at least part of the motor; a grip portion for being gripped by a user and extending substantially along a first straight line; the battery cell unit is a bag-shaped battery cell, at least part of the battery cell unit is located in the grip portion, and the extension plane of at least part of the battery cell unit located in the grip portion is substantially parallel to the first straight line.

[0048] A battery pack suitable for an electric tool comprises: a battery pack shell, formed with a coupling portion for connecting to the electric tool; a battery cell unit, arranged in the battery pack shell, the battery cell unit is a bag-shaped battery cell, and the battery cell unit basically extends along a first plane; a battery pack interface, used to output power to the electric tool, the battery pack interface is electrically connected to the battery cell unit; a power management board, the extension plane of the power management board is basically parallel to the first plane so that the power management board is arranged on the side of the battery cell unit; wherein the coupling portion is configured to enable the battery pack to be detachably connected to the electric tool, and the battery pack interface comprises: at least one battery pack terminal, and at least one battery pack terminal is located at the end of the battery cell unit.

[0049] 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.

[0050] In some embodiments, the battery cell unit is substantially rectangular, and at least one battery pack terminal is located at an end of a long side of the rectangle.

[0051] 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.

[0052] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V and less than or equal to 9V.

[0053] 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.

[0054] In some embodiments, the terminal circuit board is provided separately from the power management board.

[0055] A battery pack suitable for an electric tool comprises: a battery pack shell, formed with a coupling portion for connecting to the electric tool; a battery cell unit, arranged in the battery pack shell, the battery cell unit is a bag-shaped battery cell, and the battery cell unit basically extends along a first plane; a battery pack interface, used to output power to the electric tool, the battery pack interface is 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 is basically parallel to the first plane so that the power management board is arranged on the side of the battery cell unit; a terminal circuit board, used to support the battery pack terminals; wherein the coupling portion is arranged to enable the battery pack to be detachably connected to the electric tool, the terminal circuit board is separately arranged 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.

[0056] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V and less than or equal to 9V.

[0057] In some embodiments, an extension plane of the terminal circuit board is perpendicular to an extension plane of the power management board.

[0058] 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.

[0059] In some embodiments, the number of battery cell units arranged in parallel with the power management board is 2.

[0060] A battery pack suitable for an electric tool comprises: a battery pack shell, formed with a joint for connecting with the electric tool; a battery cell unit, arranged in the battery pack shell, the battery cell unit is a bag-shaped battery cell, and the battery cell unit basically extends along a first plane; a battery pack interface, used to output power to the electric tool, the battery pack interface is 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 is basically parallel to the first plane so that the power management board is arranged on the side of the battery cell unit; components, installed on the side of the power management board away from the battery cell unit; the volume of the components is greater than or equal to 100mm 3 , the components are arranged on the central axis of the length direction or width direction of the power management board.

[0061] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V and less than or equal to 9V.

[0062] In some embodiments, the number of battery cell units arranged in parallel with the power management board in the battery pack housing is less than or equal to 2.

[0063] A charging combination includes a first charger and a battery pack, wherein the first charger is configured to charge the battery pack; the battery pack includes: a battery pack shell; a battery cell unit, which is arranged in the battery pack shell; and a first interface, which is configured to be connected to the first charger to introduce power; wherein the first charger includes a first charging interface detachably connected to the first interface, the battery cell unit is a bag-shaped battery cell, and the first interface is a Type-C interface.

[0064] In some embodiments, the battery pack further includes a battery pack interface for connecting to the electric power tool so that the battery pack supplies power to the electric power tool, and the battery pack interface includes battery pack terminals.

[0065] In some embodiments, the charging combination further includes: a second charger including a second charging interface connected to the battery pack interface to charge the battery pack.

[0066] In some embodiments, the charging assembly further comprises: a controller configured to: block access to power through the battery pack interface when the first charger is connected to the battery pack.

[0067] In some embodiments, the charging assembly further comprises: a controller configured to: block access to power through the first interface when the second charger is connected to the battery pack.

[0068] In some embodiments, the charging power of the second charger to charge the battery cell unit through the battery pack interface is greater than or equal to 30W.

[0069] In some embodiments, the charging power of the first charger to charge the battery cell unit through the first interface is less than or equal to 15W.

[0070] In some embodiments, the charging power of the first charger to charge the battery cell unit through the first interface is greater than or equal to 15W.

[0071] In some embodiments, the charging power of the first charger to charge the battery cell unit through the first interface is greater than or equal to 18W.

[0072] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V and less than or equal to 9V.

[0073] A charging combination includes a first charger and an electric tool, wherein the electric tool includes: a tool host, including a host shell and a motor accommodated in the host shell; a battery pack, configured to supply power to the motor; the first charger is configured to charge the battery pack; the battery pack includes: at least one battery cell unit, configured to store energy; the battery pack is detachably coupled to the tool host, or the battery pack is built into the host shell; 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 bag-shaped battery cell, and the first charging interface is a Type-C interface.

[0074] In some embodiments, the battery pack is detachably coupled to the tool host, the battery pack includes a first interface that cooperates with the first charging interface, and when the battery pack is installed on the tool host, the first interface is configured to allow the first charger to charge the battery pack.

[0075] An electric tool comprises: a tool host, including an output member for outputting power, a motor for driving the output member to move, and a host housing that accommodates at least part of the motor; a battery pack, which is used to be detachably connected to the host housing to power the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that cooperates with the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged in the battery pack housing and is electrically connected to the battery pack interface; a first interface, which is arranged in the battery pack housing to charge the battery pack; the battery cell unit is a bag-shaped battery cell, and when the battery pack is combined with the tool host, at least part of the battery cell unit is located in the host housing and the first interface is located outside the host housing, and the first interface is a Type-C interface.

[0076] In some embodiments, when the battery pack is installed on the tool host, the first interface is configured to allow access to electrical energy to charge the battery pack.

[0077] In some embodiments, the host housing includes a grip portion for a user to hold, and when the battery pack is combined with the tool host, at least part of the battery cell unit is located in the grip portion, and the first interface is located outside the grip portion.

[0078] In some embodiments, the grip portion extends along a first linear direction, and the battery pack is coupled to the grip portion along the first linear direction.

[0079] In some embodiments, when the battery pack is installed on the tool host and the power tool is running, the first interface is configured to allow access to electrical energy to charge the battery pack.

[0080] A battery pack suitable for an electric tool comprises: a battery pack shell, formed with a joint for connecting to the electric tool; a battery cell unit, arranged in the battery pack shell; a power management board, arranged in the battery pack shell; a battery pack interface, connected to the electric tool to provide power to the electric tool; and 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.

[0081] In some embodiments, the maximum charging power of the wireless charging device is less than or equal to 15W.

[0082] In some embodiments, the maximum charging power of the wireless charging device is greater than 15W.

[0083] In some embodiments, 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 disposed at ends of the plurality of stacked battery cell units.

[0084] In some embodiments, the battery pack interface is disposed at the other end of the plurality of battery cell units that are stacked.

[0085] A charging combination includes a battery pack and a wireless charging device configured to charge the battery pack, wherein the battery pack includes: a battery pack shell; a battery cell unit, which is arranged in the battery pack shell; a power management board, which is arranged in the battery pack shell; a battery pack interface, which is configured to be connected to an electric tool to provide power to the electric tool; and a wireless charging device, which is configured to cooperate with the wireless charging device to charge the battery cell unit, wherein the battery pack can be detachably coupled to an electric tool to supply power to the electric tool, the battery cell unit is a bag-shaped battery cell, and 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.

[0086] A battery pack suitable for an electric tool comprises: a battery pack shell, formed with a coupling portion for connecting to the electric tool; a battery cell unit, arranged in the battery pack shell; a power management board, arranged in the battery pack shell; a battery pack interface, connected to the electric tool to provide power to the electric tool; and 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.

[0087] 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.

[0088] In some embodiments, the battery cell unit is a pouch-shaped battery cell.

[0089] In some embodiments, the battery cell unit is a cylindrical battery cell.

[0090] A charging combination, a battery pack, a first charging device and a second charging device, the battery pack comprising: a battery pack shell; a battery cell unit arranged in the battery pack shell; a battery pack interface, which is configured to be connected to an electric tool to provide power to the electric tool; a wireless charging device, which is used to access power to charge the battery cell unit; the first charging device comprises a power output module that cooperates with the wireless charging device, the second charging device comprises a second charging interface that is detachably connected to the battery pack interface, and the battery pack interface comprises a positive terminal and a negative terminal.

[0091] A battery pack suitable for an electric tool comprises: a battery pack shell, formed with a joint for connecting to the electric tool; a battery cell unit, arranged in the battery pack shell; a power management board, arranged in the battery pack shell; 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; and a USB charging interface, configured to connect to a charger to charge the battery cell unit; wherein the wireless charging device is connected to the power management board.

[0092] In some embodiments, the USB interface is further configured to enable the battery pack to output power to other power-consuming devices.

[0093] In some embodiments, the battery cell unit is a pouch-shaped battery cell.

[0094] In some embodiments, the battery cell unit is a cylindrical battery cell.

[0095] A charging combination includes: a first battery pack, which is configured to power an electric tool, the first battery pack includes a first battery unit and a first wireless charging device that can charge the first battery unit; a second battery pack, which is configured to power the electric tool, the second battery pack includes a second battery unit and a second wireless charging device that can charge the second battery unit; and a wireless charging device, which is configured to charge the first battery pack and the second battery pack simultaneously or in a preset order.

[0096] In some embodiments, the first battery cell unit is a pouch-shaped battery cell, and the second battery cell unit is a pouch-shaped battery cell.

[0097] In some embodiments, the first battery cell unit is a pouch-shaped battery cell, and the second battery cell unit is a cylindrical battery cell.

[0098] In some embodiments, the first battery cell unit is a cylindrical battery cell, and the second battery cell unit is a cylindrical battery cell.

[0099] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack, which is used to be detachably connected to the host housing to power the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that cooperates with the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged in the battery pack housing and electrically connected to the battery pack interface; the battery cell unit is a bag-shaped battery cell, and the nominal voltage of the battery pack is greater than or equal to 3V and less than or equal to 9V.

[0100] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V and less than or equal to 9V.

[0101] In some embodiments, the number of battery cell units is less than or equal to 4.

[0102] In some embodiments, a plurality of battery cell units are disposed in the battery pack shell, and the plurality of battery cell units are stacked.

[0103] In some embodiments, the host housing includes a grip portion, and when the battery pack is coupled to the tool host, a portion of the battery pack housing is located within the grip portion.

[0104] In some embodiments, the host housing includes a grip portion, and when the battery pack is coupled to the tool host, part of the battery cell unit is located within the grip portion.

[0105] In some embodiments, the nominal voltage of the battery pack is less than or equal to 13V.

[0106] A charging combination includes a charger and a battery pack, wherein the charger is configured to charge the battery pack; the charger includes: a charger housing formed with a charging coupling portion for detachably coupling with the battery pack; a charging interface for electrically connecting with the battery pack to transmit power to the battery pack to charge the battery pack; the battery pack includes: a battery pack housing; a battery cell unit disposed in the battery pack housing; a battery pack interface connected to the charging interface when the battery pack is coupled to the charger; wherein the battery pack interface is electrically connected to the battery cell unit, the battery cell unit is a bag-shaped battery cell, and the nominal voltage of the battery pack is less than or equal to 9V.

[0107] A battery pack suitable for an electric tool, comprising: a battery pack shell; a battery cell unit disposed in the battery pack shell; 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 connected to the electric tool, the number of the battery cell units is less than or equal to 4, the battery cell units are bag-shaped batteries, and the nominal voltage of the battery pack is less than or equal to 9V.

[0108] 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 part of the multiple battery cell units are stacked along a stacking direction, and the terminal circuit board is arranged at the ends of the multiple battery cell units stacked along the stacking direction.

[0109] An electric tool comprises: 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 accommodating at least part of the motor; a battery pack for supplying power to the motor; wherein the battery pack further comprises: at least one battery cell unit configured to store electrical energy; the battery cell unit is a bag-shaped battery cell, and the nominal voltage of the battery pack is greater than or equal to 3V and less than or equal to 9V.

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

[0111] In some embodiments, the nominal voltage of the battery pack is less than or equal to 9V.

[0112] In some embodiments, the number of battery cell units is less than or equal to 4, and at least part of the plurality of battery cell units are stacked.

[0113] In some embodiments, the main body housing includes: a holding portion for the user to hold, when the battery pack is combined with the tool main body, part of the battery pack housing is located within the holding portion.

[0114] In some embodiments, the main body housing includes: a holding portion for the user to hold, when the battery pack is combined with the tool main body, part of the battery cell units are located within the holding portion.

[0115] In some embodiments, the main body housing includes: a motor accommodating portion for accommodating the motor and a holding portion for the user to hold, the extending direction of the motor accommodating portion intersects with the extending direction of the holding portion, and the battery pack is combined with the holding portion along the extending direction of the holding portion.

[0116] In some embodiments, the electric tool is a screwdriver, an electric drill, an impact drill, a sander, or a cutter.

[0117] In some embodiments, the main body housing includes: a motor accommodating portion for accommodating the motor and a holding portion for the user to hold, the extending direction of the motor accommodating portion is substantially the same as the extending direction of the holding portion, and the battery pack is combined with the holding portion along the extending direction of the holding portion.

[0118] In some embodiments, when the battery pack is combined with the tool main body, the electric tool is substantially in the shape of the Chinese character "one".

[0119] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing that accommodates at least part of the motor; a battery pack for detachably connecting to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that cooperates with the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; at least one battery cell unit, which is configured to store electrical energy in the battery pack housing and is electrically connected to the battery pack interface; the host housing comprises: a motor accommodating portion for accommodating the motor and a gripping portion for a user to hold, the extension direction of the motor accommodating portion is substantially the same as the extension direction of the gripping portion, the battery pack is coupled to the gripping portion along the extension direction of the gripping portion, the battery cell unit is a bag-shaped battery cell, and the output power of the battery pack is greater than or equal to 140W and less than or equal to 750W.

[0120] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack, which is detachably connected to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that matches the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged in the battery pack housing and electrically connected to the battery pack interface; the battery cell unit is a bag-shaped battery cell, and the volume energy density of the battery pack is greater than or equal to 100mWh / cm 3 , the nominal voltage of the battery pack is less than or equal to 9V.

[0121] In some embodiments, the volume energy density of the battery pack is greater than or equal to 120 mWh / cm 3 .

[0122] In some embodiments, the gravimetric energy density of the battery pack is greater than or equal to 100 mWh / g.

[0123] In some embodiments, the nominal voltage of the battery pack is 8V.

[0124] 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.

[0125] In some embodiments, the number of battery cells in the battery pack housing is 2, and the volume of the battery pack is less than or equal to 200 cm 3 .

[0126] 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.

[0127] In some embodiments, the number of battery cell units in the battery pack shell is 4, wherein the 4 battery cell units constitute a 2P battery cell group.

[0128] In some embodiments, the main body housing includes: a motor accommodating portion for accommodating the motor and a gripping portion for a user to hold. When the battery pack is coupled to the tool main body, at least part of the battery cell unit is located in the gripping portion.

[0129] A battery pack suitable for an electric tool comprises: a battery pack housing, formed with a joint portion for connecting to the electric tool; a battery cell unit, arranged in the battery pack housing; a battery pack interface, used for outputting power to the electric tool, the battery pack interface being electrically connected to the battery cell unit; wherein the battery cell unit is a bag-shaped battery cell, and the volume energy density of the battery pack is greater than or equal to 100 mWh / cm 3 , the nominal voltage of the battery pack is less than or equal to 9V.

[0130] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack, which is used to be detachably connected to the host housing to power the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that cooperates with the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged in the battery pack housing and electrically connected to the battery pack interface; the battery cell unit is a bag-shaped battery cell, the weight energy density of the battery pack is greater than or equal to 100mWh / g, and the nominal voltage of the battery pack is less than or equal to 9V.

[0131] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack, which is used to be detachably connected to the host housing to power the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that cooperates with the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged 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 1W / cm³, and the volume of the battery pack is less than or equal to 150cm³.

[0132] 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.

[0133] In some embodiments, the output power of the battery pack is greater than or equal to 140W and less than or equal to 750W.

[0134] In some embodiments, the gravimetric energy density of the battery pack is greater than or equal to 100 mWh / g.

[0135] 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.

[0136] 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.

[0137] In some embodiments, the power tool is a handheld power tool, the main body housing includes a grip portion for a user to hold, and the battery pack is coupled to the grip portion.

[0138] A battery pack suitable for an electric tool, comprising: a battery pack housing; a battery cell unit arranged 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 250cm 3 .

[0139] An electric tool, comprising: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack, which is detachably connected to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that cooperates with the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged 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 1W / cm 3 , the volume of the battery pack is less than or equal to 150cm 3 .

[0140] An electric tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack, which is used to be detachably connected to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that cooperates with the host interface, and when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged in the battery pack housing and electrically connected to the battery pack interface; the battery cell unit is a bag-shaped 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 1W / g, and the weight of the battery pack is less than or equal to 180g.

[0141] A power tool comprises: a tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing accommodating at least part of the motor; a battery pack for being detachably connected to the host housing to supply power to the motor; wherein the tool host comprises a host interface, the battery pack comprises a battery pack interface that cooperates with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack further comprises: a battery pack housing; a battery cell unit, which is arranged in the battery pack housing and electrically connected to the battery pack interface; the host housing comprises: a motor housing portion for accommodating at least part of the motor; a grip portion for being gripped by a user; wherein the battery cell unit is a bag-shaped battery cell, when the battery pack is coupled to the tool host, at least part of the battery cell unit is located in the grip portion, the battery pack is coupled to the grip portion along a first straight line direction, the perimeter of the outer contour of the cross-section of the portion 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 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.

[0142] In some embodiments, the nominal voltage of the battery pack is greater than or equal to 7V.

[0143] In some embodiments, the number of battery cell units in the battery pack housing is greater than or equal to 2.

[0144] In some embodiments, the extension plane of the pouch-shaped battery cell is substantially parallel to the first straight line.

[0145] 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.

[0146] In some embodiments, the volume energy density of the battery pack is greater than or equal to 120 mWh / cm 3 .

[0147] In some embodiments, a perimeter of an outer contour of a cross section of the grip 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.

[0148] In some embodiments, the gravimetric energy density of the battery pack is greater than or equal to 110 mWh / g.

[0149] The benefit of the present application lies in that the cell units of the battery pack in the electric tool are bag-shaped cells, so that the energy density of the battery pack is higher, the battery life of the battery pack is improved and the size of the electric tool can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0150] Figure 1 is a plan view of a power tool system according to an embodiment of the present application; Figure 2 yes 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 are separated; Figure 4 is Figure 2 The perspective view of a partial holding part of the electric drill in ; Figure 5 is Figure 1 The perspective view of the battery pack in ; Figure 6a is Figure 5 The plan view of the battery pack in ; Figure 6b is Figure 6a The sectional view of the battery pack in along line A - A; Figure 6c is Figure 6a The sectional view of the battery pack in along line B - B; Figure 7a is Figure 5 The side view of the battery pack in ; Figure 7b is Figure 7a The sectional view of the battery pack in along line C - C; Figure 8 is Figure 5 The exploded view of the battery pack in ; Fig. 9 is Figure 8 The perspective view of another angle of the structure shown in ; Fig.10 is Figure 8 The plan view of the cell unit, cell bracket and circuit board assembly in ; Fig.11a is Fig.10 The perspective view when the circuit board assembly and the cell bracket of the structure shown in are separated; Fig.11b is Fig.11a The perspective view of another angle of the structure shown in ; Fig.12a is Fig.10 The exploded view of the structure shown in ; Figure 12b is Fig.12a The perspective view of another angle of the structure shown in ; Fig.13 is Figure 2 The sectional view of the power tool in in plane P; Fig.14 The perspective view of a charging combination of the present application in ; Fig.15 is the module diagram of the charging combination shown in 14; Fig.16An exploded view of a battery pack according to another embodiment of the present application; Fig.17 It is a stereogram of another charging combination; Fig.18 yes Fig.16 A plan view of the battery pack in FIG. Fig.19 yes Fig.16 A plan view of a battery pack and a fan; Fig. 20 is a plan view of a charging assembly according to another embodiment of the present application; Fig.21 is a plan view of another electric tool of the present application; Fig. 22 is a three-dimensional diagram of a battery pack according to another embodiment of the present application; Fig.23 yes Fig. 22 A plan view of the battery pack when the first housing portion is separated; Fig.24 yes Fig. 22 An exploded view of the battery pack in Figure 1; Fig.25 yes Fig. 22 A schematic diagram of a cell unit in a battery pack; Fig.26 Shown is a schematic diagram of the arrangement of battery cell units in another battery pack in the present application. DETAILED DESCRIPTION

[0151] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0152] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0153] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0154] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0155] In this application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, etc. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0156] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0157] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0158] In this application, the terms "controller", "processor", "central processing unit", "CPU", and "MCU" are interchangeable. When a unit "controller", "processor", "central processing unit", "CPU", or "MCU" is used to perform a specific function, unless otherwise specified, these functions can be performed by a single unit or multiple units.

[0159] In the present application, the terms “device”, “module” or “unit” may be implemented in the form of hardware or software to achieve specific functions.

[0160] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0161] like Figure 1 The battery pack 100 shown is used to power an electric tool. The battery pack 100 is an energy storage device that can transmit power to the electric tool to power the electrical components in the electric tool. Figure 1 As shown, the power tool can be an electric drill 200a, a grinder 200b, a wrench 200c, or a cutter 200d. It is understandable that in other embodiments, the power tool can also be a torque output tool such as a screwdriver, an impact drill, an electric hammer, a ratchet wrench, etc. The power tool can also be a grinding tool such as an angle grinder, a sander, a straight grinder, a polisher, etc. The power tool can also be a cutting tool such as an electric circular saw, a reciprocating saw, a jigsaw, etc. In some embodiments, the battery pack 100 can also be configured to be detachably coupled to an electric fan, a lamp, etc. to power these devices, and the battery pack 100 can power the motor 212 that drives the fan blades, or the light-emitting element.

[0162] like Figure 2 and Figure 3 As shown, an electric drill 200a is used as a specific example of an electric tool in this embodiment. In the following, the electric tool 200a is used to replace the electric drill 200a.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] like Figures 5 to 9 As shown, the battery pack 100 includes: a battery pack housing 11, a battery cell unit 13, a battery cell holder 14 and a circuit board assembly 15. The battery pack housing 11 is used to form a battery cell accommodating cavity 112 for accommodating the battery cell unit 13, the battery cell holder 14 and the circuit board assembly 15. The number of the battery cell unit 13 is at least one, and the battery cell unit 13 is used to store electrical energy. For example, Figures 5 to 9 In the illustrated embodiment, the number of the battery cell units 13 is 2. In some embodiments, the number of the battery cell units 13 may be multiple, that is, the number of the battery cell units 13 is greater than or equal to 2. It is understandable that the number of the battery cell units 13 is not limited thereto. The battery cell holder 14 is used to support the battery cell unit 13. It is understandable that in other embodiments, the battery cell holder 14 may not be independently provided, and the battery cell holder 14 may be formed by the battery pack shell 11, and the battery pack shell 11 constitutes the battery cell holder 14 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.

[0168] In this embodiment, the battery cell unit 13 is arranged in the battery pack shell 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 bag-shaped battery cell. The bag-shaped battery cell includes a packaging bag, and an electrolyte disposed in the packaging bag. The bag-shaped battery cell is easy to deform, so the battery cell holder 14 can play a certain role in fixing the shape of the bag-shaped battery cell. The volume energy density of the bag-shaped battery cell is greater than or equal to 0.4 Wh / cm³. In some embodiments, the volume energy density of the bag-shaped battery cell is greater than or equal to 0.42 Wh / cm³. In some embodiments, the volume energy density of the bag-shaped battery cell is greater than or equal to 0.44 Wh / cm³. In some embodiments, the volume energy density of the bag-shaped battery cell is greater than or equal to 0.45 Wh / cm³. In some embodiments, the volume energy density of the bag-shaped battery cell is greater than or equal to 0.46 Wh / cm³. In some embodiments, the volume energy density of the bag-shaped battery cell is greater than or equal to 0.48 Wh / cm³. In some embodiments, the volume energy density of the pouch-shaped battery cell is greater than or equal to 0.5 Wh / cm³. In some embodiments, the volume energy density of the pouch-shaped battery cell is greater than or equal to 0.51 Wh / cm³. In some embodiments, the volume energy density of the pouch-shaped battery cell is greater than or equal to 0.52 Wh / cm³. In some embodiments, the volume energy density of the pouch-shaped battery cell is greater than or equal to 0.53 Wh / cm³.

[0169] 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. Among them, for power tools 200a and battery packs, the nominal voltage generally refers to the voltage specified by the manufacturer or seller on the labels, packaging, user manuals, instructions, 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 detection or calculation. The voltage of a single battery cell 13 is generally between 3.6V and 4.2V. Figures 5 to 9 In the illustrated embodiment, the battery pack 100 includes two battery cells 13, each of which has a voltage of 4V, and the two battery cells 13 are connected in series, so the nominal voltage of the battery pack 100 can be considered to be 8V. It can be understood that the nominal voltage of the battery pack 100 is related to the number of battery cells 13 connected in series in the battery pack 100. For example, when the number of battery cells 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 3.6V, 4V or 4.2V.

[0170] 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 battery cells 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 10.8V, 12V or 12.6V. Similarly, when the number of battery cells 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 14.4V, 16V or 16.8V.

[0171] In this embodiment, the nominal voltage of the battery pack 100 is greater than or equal to 7 V and less than or equal to 9 V. For example, in this embodiment, the number of the battery cell units 13 is 2, and two battery cell units 13 are connected in series, then the nominal voltage of the battery pack 100 can be considered to be 7.2 V to 8.4 V, specifically 7.2 V, 8 V or 8.4 V.

[0172] In some other embodiments, the number of battery cell units 13 of the battery pack 100 is less than or equal to 4, and the four battery cell units 13 can be connected in series. Alternatively, the four battery cell units 13 can also form two battery cell groups, the two battery cell groups are connected in parallel, and the two battery cell units 13 in each battery cell group are connected in series. When the four battery cell units form two battery 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.

[0173] In some embodiments, the nominal voltage of the battery pack 100 is less than or equal to 13 V. For example, the battery pack 100 includes three battery cells 13 connected in series, and the nominal voltage of the battery pack 100 can be 10.8 V, 12 V, or 12.6 V. Figure 6b and 6c As shown, a plurality of battery cell units 13 are stacked and arranged in the battery pack housing 11. Here, we can define the direction perpendicular to the battery cell units 13 as the stacking direction 102 of the plurality of battery cell units 13, that is, the plurality of battery cell units 13 are stacked together in sequence along the stacking direction 102. In this embodiment, the stacking direction 102 of the plurality of battery cell units 13 is perpendicular to the first straight line 101 direction of the battery pack 100 combined with the tool host 21.

[0174] In this embodiment, the battery pack 100 is detachably connected to the tool host 21. In fact, in other embodiments, it can be understood that the battery pack can also be a battery pack built into the host housing, and the battery pack is used to power the motor. The battery pack includes at least one battery cell unit, which is used to store electrical energy. The battery cell unit is arranged in the grip portion, and the extension plane of the battery cell unit is parallel to the first straight line direction. All technical solutions in this application that can be applied to the battery pack built into the host housing can be applied to the power tool with a built-in battery pack. The details will not be repeated.

[0175] like Figure 3 and Figure 4 As shown, the power tool 200a is a handheld power tool 200a, and the main body housing 22 also includes a gripping portion 225, and the gripping portion 225 is used for the user to hold. The gripping portion 225 is connected to the accommodating portion 221, and extends from the accommodating portion 221 along the direction of the first straight line 101. The extension direction of the gripping portion 225 intersects with the extension direction of the accommodating portion 221. The battery pack 100 is coupled to the gripping portion 225 along the extension direction of the gripping portion 225. One end of the gripping portion 225 is connected to the accommodating portion 221, and the other end forms the above-mentioned slot 224. The slot 224 is disposed in the gripping portion 225 and is formed by the gripping portion 225. In other words, the slot wall forming the slot 224 constitutes a part of the gripping portion 225. When the user holds the power tool 200a, the user's hand will hold the outer wall of the slot 224. When the battery pack 100 is coupled to the tool host 21, part of the battery pack housing 11 is disposed in the slot 224 formed by the grip 225, and part of the battery cell unit 13 is also located in the slot 224 formed by the grip 225. In this way, part of the battery pack 100 is located in the grip 225. When the user operates the power tool 200a, part of the battery pack 100 is located in the grip space formed by the user's palm and fingers.

[0176] Understandable, such as Figure 1 As 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 substantially the same as that of the holding part, and the main body housing is substantially 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 substantially in the shape of the Chinese character "one". Thus, when the battery pack 100 is coupled to the holding part, a part of the battery pack 100 is located within the holding part, which can make the volume of the entire power tool smaller, and the entire power tool is also substantially in the shape of the Chinese character "one".

[0177] In this embodiment, the battery cell unit 13 is a pouch-type battery cell, and the nominal voltage of the battery pack 100 is less than or equal to 9V. This makes the volume of the battery pack 100 smaller, so that when a part of the battery pack 100 is disposed within the holding part 225, the holding part 225 is still relatively thin, facilitating the user to operate the power tool 200a. Moreover, when a part of the battery pack 100 is disposed within the holding part 225, the space within the holding part 225 can be fully utilized, thereby reducing the size of the entire power tool 200a, which is beneficial to the miniaturization of the power tool 200a.

[0178] In some embodiments, the nominal voltage of the battery pack can also be less than or equal to 17V.

[0179] In this embodiment, the output power of the battery pack 100 is greater than or equal to 140W and less than or equal to 750W. The output power is calculated based on the rated current of the battery pack 100 and the nominal voltage of the battery pack 100. The rated current of the battery pack 100 can be the average working current of the power tool 200a. Similarly, it can be understood that the output power of the battery pack 100 can also be regarded as the working power of the power tool 200a. For the power tool 200a, the average working current is usually within a certain range, and the corresponding working power can also vary within a certain range. For example, in this embodiment, the power tool 200a is a drill 200a, the average current of the drill 200a is 21A to 48A, and the nominal voltage of the battery pack 100 is 8V. Thus, the working power of the power tool 200a is 168W to 384W, and at this time, the output power of the battery pack 100 can be regarded as 168W to 384W.

[0180] Thus, with the nominal voltage of the battery pack 100 being 8V, the battery pack 100 can meet the requirements of a power tool 200a with a relatively large power, thereby improving the adaptability of the battery pack 100.

[0181] 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.

[0182] In some embodiments, the volume energy density of the battery pack 100 is greater than or equal to 100 mWh / cm 3 , the nominal voltage is less than or equal to 9V. In this way, for a 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 volume energy density is the ratio of the energy to the volume of the battery pack 100. The volume of the battery pack 100 can refer to the amount of three-dimensional (3D) space occupied by the entire battery pack 100, expressed in cubic units (for example, 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. The volume of the battery pack 100 can also be measured in other ways commonly used by those skilled in the art.

[0183] In some embodiments, the volume energy density of the battery pack 100 is greater than or equal to 120 mWh / cm 3 In some embodiments, the volume energy density of the battery 100 is greater than or equal to 130 mWh / cm 3 In some embodiments, the weight energy density of the battery pack 100 may be further defined as being greater than or equal to 100 mWh / g. The weight energy density is the ratio of the energy to the weight of the battery pack 100. This can reduce the overall weight of the battery pack 100 while ensuring that the battery pack 100 provides sufficient battery life.

[0184] In some embodiments, the weight energy density of the battery pack is greater than or equal to 110 mWh / g. In some implementations, the weight energy density of the battery pack is greater than or equal to 120 mWh / g.

[0185] 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 .

[0186] In some embodiments, the capacity of the battery pack 100 is greater than or equal to 1.5Ah and less than or equal to 5Ah. The energy of the battery pack 100 is greater than or equal to 7Wh and less than or equal to 9Wh. In this way, the total capacity of the battery pack 100 is larger, which can increase the battery life of the battery pack 100.

[0187] 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 1W / 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 battery cell unit 13 is a bag-shaped battery cell, which can increase the output power of the battery pack 100 while reducing the volume of the battery pack 100. As a result, the power tool 200a can reduce the volume of the battery pack 100 and increase the battery life of the battery pack 100 while meeting the working power.

[0188] In some embodiments, a 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.

[0189] like Figure 6b FIG. 1 is a cross-sectional view of a portion of the battery pack 100 located in the slot 224 of the grip portion 225 in a plane P perpendicular to the direction of the first straight line 101. Figure 6b As shown, the cross section of the battery pack 100 in the plane P perpendicular to the first straight line 101 has an outer contour 11a. Figure 6b The bold lines. Among them, the circumference of the outer contour 11a is greater than or equal to 10cm and less than or equal to 14cm. Among them, the circumference of the outer contour 11a can be measured by the rope winding method, and the length of a rope used to wrap a rope around the outer contour 11a can be defined as the circumference of the outer contour 11a. It can be understood that those skilled in the art can also use other common methods of measuring the circumference. In this way, for the handheld power tool 200a, the battery pack 100 is relatively thin, so that the battery pack 100 is more suitable for inserting into the grip 225 without increasing the size of the grip 225, so that the space in the grip 225 can be effectively utilized. In particular, for the power tool 200a with a smaller voltage platform, it is hoped that the size of the power tool 200a can be small enough while meeting the working power. In some embodiments, the circumference of the outer contour 11a is greater than or equal to 11cm and less than or equal to 13.5cm.

[0190] like 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 8cm² and less than or equal to 14cm². In this way, the size of the battery pack 100 is small and convenient for users to hold, and the size of the battery pack 100 is not too small to be convenient for setting internal battery cells 13, circuit board assemblies 15 and other components. Among them, the area can be measured using a measurement method commonly used by technicians in this field, such as the grid method. The grid method is to simulate the outer contour 11a and divide it into several squares, then calculate the area of ​​each square, and then sum the areas of several squares to approximately obtain the area of ​​the outer contour 11a. Of course, those skilled in the art may 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 10cm² and less than or equal to 12.5cm².

[0191] like Fig.13 The figure shows a cross-sectional view of the grip portion 225 and the battery pack 100 located in the grip portion 225 in the plane P. The inner thick line in the cross-sectional view is the outer contour 11a of the battery pack 100, and the outer thick line is the outer contour 225a of the grip portion 225. In this embodiment, because the outer contour 11a of the cross section of the battery pack 100 in the plane P is smaller, the outer contour 225a of the cross section of the grip portion 225 in the plane P can be designed to be smaller accordingly. For example, the perimeter of the outer contour 225a of the cross section of the grip 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 is also possible to make the area of ​​the outer contour 225a of the cross section of the grip 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, so that not only the grip portion 225 is too thin to reduce the grip contact surface, but also the grip portion 225 is not too thick and uncomfortable to hold. In some implementations, the perimeter of the outer contour 225a of the cross section of the grip 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 grip 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 like 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 grip 225 can be 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 basically an ellipse, which is convenient for designing the grip 225 that accommodates the battery pack 100 to be approximately elliptical. In some embodiments, a dimension L1 of a cross-section of the battery pack 100 in plane P in a 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 a dimension L2 of a cross-section of the battery pack 100 in plane P in a 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.

[0192] like Fig.13 As shown, the dimension L3 of the cross section of the grip portion 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 grip portion 225 can be made suitable for the user to hold comfortably and stably. The dimension L4 of the cross section of the grip portion 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 grip portion 225 can be made to be basically an ellipse, so that the user can comfortably operate the power tool 200a, taking into account the ergonomics of the power tool 200a.

[0193] like Figures 4 to 7bAs shown, the battery cell unit 13 is a bag-shaped battery cell, and the bag-shaped battery cell extends within the extension plane P2. Alternatively, it can be understood that the plane where the largest surface of the bag-shaped battery cell is located is the extension plane P2. The extension plane of the battery cell unit 13 is basically parallel to the first straight line 101. The extension direction of the gripping portion 225 is the first straight line 101, and the gripping portion 225 has the largest size in the direction of the first straight line 101, and the plane where the largest surface of the battery cell unit 13 is located is the extension plane. In this way, by making most of the battery cell units 13 located in the gripping portion 225 and the extension plane being basically consistent with the first straight line 101, the overall volume of the gripping portion 225 and the battery pack 100 can be reduced, and the battery cell unit 13 can fully utilize the space formed by the gripping portion 225 in the direction of the first straight line 101.

[0194] like Figure 7b As 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. The length L6 of the battery cell unit 13 is the dimension of the battery cell unit 13 along the direction of the first straight line 101, and the width L7 of the battery cell unit 13 is the dimension of the battery cell unit 13 along 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.

[0195] like Figures 6a to 12b As shown, the circuit board assembly 15 is used to control the charge and discharge of the battery pack 100 and protect the battery pack 100. The circuit board assembly 15 is disposed in the battery pack housing 11. A plurality of electronic components are disposed on the circuit board assembly 15.

[0196] The circuit board assembly 15 includes: a power management board 151. The power management board 151 is used to manage the relationship between the multiple battery cells 13, and also controls the parameters and process of charging and discharging the battery pack 100. The extension plane of the power management board 151 is substantially parallel to the extension plane of the battery cell 13 located in the grip portion 225. In this way, the space on the left and right sides of the battery cell 13 can be fully utilized, so that the power management board 151 and the battery cell 13 fully utilize the space within the ellipse.

[0197] The power management board 151 is stacked on the side of the battery cell unit 13 in the grip portion 225, and the extension plane of the power management board 151 is also parallel to the first straight line 101 of the grip portion 225. It should be noted that the side of the battery cell unit 13 can be understood as the area on both sides of the extension plane of the battery cell unit 13. In this embodiment, the two battery cell units 13 are arranged parallel to the power management board 151.

[0198] In this embodiment, the battery cell unit 13 at least partially located in the grip 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 close to the host interface 223, the second end 13c is opposite to the first end 13b, and the second end 13c is the end of the first group of battery cells 13a away from the host interface 223. When the battery pack 100 is combined with the grip portion 225, the first end 13b is located in the grip portion 225, and the second end 13c is located outside the grip portion 225. In other words, when the battery pack 100 is combined with the grip portion 225, the first end 13b is located in the slot 224, and the second end 13c is located outside the slot 224. The battery pack interface 12 is 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 into the bottom of the slot 224, the battery pack interface 12 at the first end 13b can first connect with the host interface 223 at the bottom of the slot. Thus, when the battery pack 100 is inserted into 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 more stable, but the host interface 223 and the battery pack interface 12 can also be protected from interference from the external environment.

[0199] The circuit board assembly 15 also includes: a terminal circuit board 152. The battery pack interface 12 includes at least one battery pack 100 terminal. For example, the battery pack interface 12 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 battery pack 100 terminals, 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 arranged at the first end 13b of the first group of battery cells 13a, so that the battery pack interface 12 can be conveniently arranged at the bottom of the slot 224 of the battery pack 100, and the size of the battery pack 100 in the direction perpendicular to the plane P of the first straight line 101 can be reduced, which is conducive to designing a grip 225 suitable for the user to hold.

[0200] The terminal circuit board 152 extends substantially in a direction perpendicular to the first straight line 101 , so as to fully utilize the space at the first end 13b of the first group of cells 13a . It is understandable that in other embodiments, the terminal circuit board 152 may also be arranged obliquely relative to the first straight line 101 .

[0201] 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 is separately arranged from the terminal circuit board 152, and the power management board 151 is arranged on the side of the first group of batteries 13a and is parallel to the first plane. As we know, the battery pack 100 terminal usually has a certain length, so the battery pack 100 terminal is arranged at the end of the battery cell unit 13 instead of the side, which 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 gripping portion 225 in the direction of the first straight line 101. The extension plane of the terminal circuit board 152 is not parallel to the extension plane of the power management board 151. For example, in 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 unit 13 stacked along the stacking direction 102, so that the battery pack 100 terminal is located at the end of the long side of the rectangle.

[0202] like Figure 6b , 6c and Fig.10 As shown, the power management board 151 has a component 151a, and the component 151a is installed on the side of the power management board 151 away from the battery cell unit 13. The volume of the component 151a is greater than or equal to 100mm 3 , the component 151a is 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 component 151a in the direction perpendicular to the extension plane is greater than or equal to 3mm, wherein the length direction is consistent with the direction of the first straight line 101, and the length direction is also perpendicular to the width direction and the thickness direction. For example, in this embodiment, the component 151a is arranged on the central axis 103 in the width direction of the power management board 151, so that the bulging space in the middle of the ellipse can be fully utilized, thereby increasing the volume energy density of the battery pack 100. In this embodiment, the dimension L5 of the component 151a in the direction perpendicular to the extension plane is greater than or equal to 3mm, so that the height of the component 151a is relatively high. If the component 151a is installed at other positions on the power management board 151, the size of the battery pack 100 will be relatively large. The component 151a with a relatively high height can be, for example, a capacitor, an inductor, or other device.

[0203] like Figures 8 to 12bAs shown, the cell support 14 is used to support the cell unit 13. In this embodiment, the 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 surfaces of the cell unit 13.

[0204] The first support portion 141 surrounds the four end surfaces of the battery cell unit 13 to form a battery cell receiving chamber 112. One side of the battery cell receiving chamber 112 is open to improve the heat dissipation effect of the battery cell unit 13, and the other side of the battery cell receiving chamber 112 is provided with a second support portion 142.

[0205] The second support portion 142 is disposed at one side 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 install 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 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 also provided 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 arranged on different sides of the power management board 151. The detection device 151b is used to detect the temperature of the battery cell unit 13. The detection device 151b is arranged on the side of the power management board 151 close to the battery cell unit 13 to make the temperature detection more accurate. The second support portion 142 is also provided with a through hole 142c, and the through hole 142c makes the space on both sides of the second support portion 142 connected. The detection device 151b is arranged at a position of the power management board 151 that is directly opposite to the position of the through hole 142c. The detection device 151b can be located in the through hole 142c, and can even 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 can be arranged 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.

[0206] like Figure 3 , Figure 8 and Fig. 9As shown, the battery pack housing 11 includes a first housing portion 111 and a second housing portion 112, and the first housing portion 111 and the second housing portion 112 form a detachable connection along the direction of the first straight line 101. In this way, the battery pack 100 can be easily installed. The first housing portion 111 forms a first barrel portion 111a, and the first barrel portion 111a extends along the direction of the first straight line 101. The end of the first barrel portion 111a close to the second housing portion 112 is open, and the end of the first barrel portion 111a away from the second housing portion 112 is provided with the battery pack 100 terminal. The end of the first barrel portion 111a away from the second housing portion 112 is partially closed and forms a through hole 142c that allows the tool terminal or the battery pack 100 terminal to pass through. The second housing portion 112 forms a second barrel portion 112a, and the second barrel portion 112a is connected to the first barrel portion 111a to form a battery cell accommodating chamber 112 for accommodating the battery cell unit 13. The end of the second barrel portion 112a close to the first barrel portion 111a is open, and the other end is at least partially closed. The dimension of the first housing portion 111 along the direction of the first straight line 101 is greater than the dimension of the second housing portion 112 along the direction of the first straight line 101 .

[0207] The outer wall of the second barrel 112a also forms a locking structure 112b, which is adapted to the matching structure 226 on the main body housing 22 so that the battery pack 100 can be locked when it is combined with the main body housing 22, thereby preventing the battery pack 100 from being separated from the power tool 200a due to vibration, and also ensuring the stability of the connection between the battery pack interface 12 and the tool interface. Specifically, the locking structure 112b is a buckle.

[0208] like Figure 2 , Figure 5 as well as Figure 8 As shown, the battery pack 100 further includes: a power display component 161 and a first interface 162, wherein the first interface 162 is used to connect an external charging device so that the external charging device can charge the power tool 200a. The power display component 161 is used to display the remaining power of the battery pack 100, and the power display component 161 and the first interface 162 are both arranged on a side of the power management board 151 away from the battery cell unit 13. The first interface 162 is also arranged so that the charging device is coupled to the first interface 162 in a direction parallel to the power management board 151 and perpendicular to the first straight line 101.

[0209] The first interface 162 is at least partially disposed on the battery pack housing 11, specifically, on the second housing portion 112. When the battery pack 100 is coupled to the tool host, the first interface 162 is located outside the host housing. In this way, the user can charge the battery pack 100 without disassembling the battery pack 100. In this embodiment, when the battery pack 100 is coupled to the grip portion 225, the first interface 162 is located outside the grip portion 225.

[0210] Among them, the first interface 162 is a USB charging interface, which can not only be used for charging, but also output power to power 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 to match the battery pack 100, or it can be a common type-c universal charger on the market. In this embodiment, the battery cell unit 13 in the battery pack 100 is a bag-shaped battery cell, so that the volume energy density of the battery pack 100 is relatively large, so that the battery pack 100 can not only power the power tool 200a, but also allow the battery pack 100 to have a sufficiently long battery life to charge other electrical devices. That is to say, the first interface 162 can also output power so that the battery pack 100 can power other electrical devices.

[0211] like Fig.14 The charging assembly 300 shown includes: a battery pack 100 and a first charger 31. The battery pack 100 is Figures 1 to 3 The battery pack 100 in the embodiment of the present invention. 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.

[0212] In some embodiments, the first charger 31 is a common type-c universal charger on the market, which can charge mobile phones. The charging power of the first charger 31 is less than or equal to 15W.

[0213] Alternatively, in some embodiments, the charging power of the first charger 31 is greater than or equal to 15 W. Alternatively, the charging power of the first charger 31 is greater than or equal to 18 W. In this way, the charging time of the battery pack 100 can be shortened.

[0214] When the battery pack 100 is installed in the tool host 21, the first interface 162 is also configured to allow access to electric energy to charge the battery pack 100. That is, when the battery pack 100 is installed in the tool host 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. Alternatively, when the power tool 200a is running, the first interface 162 allows access to electric energy to charge the battery pack 100, so that the user can achieve the effect of charging and using the battery pack 100 by directly charging the battery pack 100 without disassembling it.

[0215] In some embodiments, the battery pack interface 12 may also be configured as a charging interface, through which the battery pack 100 is connected to an external charging device to charge the battery pack 100. Fig.14 As shown, the charging assembly 300 further includes a second charger 32, and the second charger 32 includes a second charging interface 321 detachably connected to the battery pack interface 12 to charge the battery pack 100. In other words, the battery pack interface 12 can be configured to output power to charge the power tool 200a, and is also configured to receive power to charge the battery cell unit 13. The charging power of the battery pack interface 12 is greater than or equal to 30W.

[0216] The second charger 32 is formed with a charging coupling portion 322, to which the battery pack 100 can be coupled, and the charging coupling portion 322 is also configured with a charging terminal 323 connected to the terminal of the battery pack 100. The charging coupling portion 322 can be a structure similar to the slot 224 of the above-mentioned grip portion 225. In this way, when the battery pack 100 is coupled to the second charger 32, the battery pack interface 12 is electrically connected to the second charging interface 321. The charging power of the second charger 32 is greater than or equal to 30W. In some embodiments, the charging power of the second charger 32 is greater than or equal to 40W.

[0217] like Fig.14 and Fig.15 As shown, the charging assembly 300 may 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 the access to power through the battery pack interface 12 when the first charger 31 is connected to the battery pack 100, that is, when the first charger 31 is charging the battery pack 100, the second charger 32 is prevented from charging the battery pack 100.

[0218] In other embodiments, the controller 33 may 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 . In other words, the first charger 31 is prevented from charging the battery pack 100 when the second charger 32 is charging the battery pack 100 .

[0219] In some other embodiments, the charging assembly 300 may only include the battery pack 100 and the first charger 31 , that is, the battery pack 100 can only be charged by the first charger 31 .

[0220] like Fig.16 Another battery pack 400 is shown. Figure 5 The battery pack 100 shown is basically the same, the main difference is that a wireless charging device 401 is provided. Figure 5The structure of the battery pack 100 in the embodiment that is compatible with the present embodiment can be applied to the present embodiment, and the details will not be repeated. The following mainly introduces the present embodiment and Figure 5 Differences of the embodiments shown.

[0221] like Fig.16 Shown to Fig.19 As shown, the wireless charging device 401 is used to access power to charge the battery cell unit 403, and includes: a receiving coil 402, which is arranged at one end of the stacked multiple battery cells 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.

[0222] like Fig.17 As shown, another charging combination 45 is formed by a battery pack 400 and a wireless charging device 43. The wireless charging device 401 is connected to a 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 403.

[0223] The wireless charging device 43 includes: a power output module and a power interface 432. The power output module is used to cooperate with the wireless charging device 401. Specifically, the power output module includes a transmitting coil 433, which matches the receiving coil 402, and the transmitting coil 433 and the receiving coil 402 can realize energy transfer. The power interface 432 is used to connect to an external power device. For example, the power interface 432 can be connected to the mains 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 using conventional wireless charging devices 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, there is no need to purchase a wireless charging device 43 separately, but the user can use the wireless charging device 43 already available at home to charge the battery pack 400, thereby reducing the user's use cost.

[0224] 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 fully charged quickly. The user can purchase a dedicated wireless charging device 43 for charging, and the power of the wireless charging device 43 to charge the battery pack 400 is greater than or equal to 20W.

[0225] In another embodiment of the battery pack 400, the battery pack 400 and Fig.16The battery pack 400 shown is substantially the same, the main difference being that the battery cell unit 403 is a cylindrical battery cell. Thus, the wireless charging device 401 can cooperate with the wireless charging device 43 to charge the cylindrical battery cell.

[0226] like Fig.17 and Fig.18 As 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 device 408, and the corresponding wireless charging device 43 is provided with a corresponding second magnetic device 434 at the charging position. Through the cooperation of the first magnetic device 408 and the second magnetic device 434, the battery pack 400 can be adsorbed at the charging position, so as to facilitate the user to accurately position the battery pack 400 and ensure the stability of charging.

[0227] like Fig.19 As shown, an external fan 44 can also be adsorbed by 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 for the battery pack 400. The external fan 44 is provided with a third magnetic attraction device 441 that cooperates with the first magnetic attraction device 408.

[0228] In some embodiments, the positioning structure may also be a snap-fit ​​structure, and the battery pack is positioned at the charging position of the wireless charging device through the snap-fit ​​structure.

[0229] In some embodiments, the positioning structure can also be a specific positioning protrusion or groove on the surface of the battery pack. The corresponding wireless charging device is provided with a corresponding positioning groove or protrusion. The battery pack is positioned in the charging position through the cooperation of the protrusion and the groove.

[0230] In some embodiments, the positioning structure may also be an outer shape formed on the surface of the battery pack itself, and the wireless charging device is formed with a corresponding matching outer shape that can cooperate with the outer shape to position the battery pack to the charging position.

[0231] like Fig. 20 Another charging assembly 500 shown in FIG. 5 includes a first battery pack 501, a second battery pack 502, and a wireless charging device 503. The first battery pack 501 can be connected to Fig.16 The second battery pack 502 may also be connected to the wireless charging device 503 of FIG. 5 , which includes a first battery cell unit and a first wireless charging device capable of charging the first battery cell unit. The first battery cell unit is a bag-shaped battery cell, and the specific structure is not repeated here. Fig.16The wireless charging device 503 is the same as the battery pack in the embodiment of the present invention, 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 bag-shaped battery cell, and the specific structure is not repeated 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, so that the user can use the first battery pack 501 in a timely manner.

[0232] In some embodiments, the wireless charging device 503 can also charge the first battery pack 501 and the second battery pack 502 at the same time, so that when some tool hosts that need to use two battery packs are working, the first battery pack 501 and the second battery pack 502 can be used in time. Alternatively, when two tool hosts need to work, the first battery pack 501 and the second battery pack 502 can be used in time respectively.

[0233] In some embodiments, the wireless charging device 503 may also first charge the battery pack with lower power among the first battery pack 501 and the second battery pack 502, and then when the battery pack with lower power is charged to the same power as the other battery pack, charge the first battery pack 501 and the second battery pack 502 at the same time.

[0234] In this embodiment, both the first battery cell unit and the second battery cell unit are pouch-shaped battery cells. In other embodiments, the first battery cell unit may be a pouch-shaped battery cell, while the second battery cell unit may be a cylindrical battery cell. Alternatively, in other embodiments, both the first battery cell unit and the second battery cell unit may be cylindrical battery cells.

[0235] 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.

[0236] 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 is understandable that in other embodiments, the wireless charging device 503 is also provided with multiple charging positions, and the multiple charging positions make it unnecessary for the first battery pack 501 and the second battery pack 502 to be placed in a specific position for charging, but can be charged at any position within a charging area of ​​the wireless charging device 503, thereby improving the convenience of charging.

[0237] In another embodiment of the electric tool, the electric 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 to be detachably connected to the first battery pack, and the second tool interface is used to be detachably connected to the second battery pack. The first battery pack can be Figure 5 ,or Fig.16 The specific structure of the battery pack in the embodiment will not be described in detail. The second battery can be Figure 5 or Fig.16 The specific structure of the battery pack in the embodiment is not repeated here. In the present embodiment, the first battery pack includes: a first battery pack shell and a first battery cell unit, and the first battery cell unit is arranged in the first battery pack shell. The second battery pack includes a second battery pack shell and a second battery cell unit in the second battery pack shell. The first battery cell unit is a bag-shaped battery cell, and the second battery cell unit is a bag-shaped battery cell. In this way, the volume energy density of the first battery pack and the second battery pack can be set relatively high. Thereby improving the endurance of the power tool.

[0238] like Fig.21 and Fig.25 As shown, the present application also provides another battery pack 600 suitable for a tool host 600a, the battery pack 600 and Figure 5 The battery pack 100 in the embodiment can be adapted to the same tool host 21, the main difference being the number of battery cells 601 contained in the battery pack 600. Figure 5 In the battery pack 100 shown, the number of battery cells 601 is 2, and two battery cells 601 are connected in series, so that the two battery cells 601 constitute a first group of battery cells 602, also called a 1P group of battery cells. The number of battery cells 601 included in the battery pack 600 in this embodiment is 4. The four battery cells 601 constitute a 2P battery group, which can be defined as Figure 5 The two battery cells 601 having the same battery cell 601 are the first group of battery cells 602, and the other two battery cells 601 are the second group of battery cells 603. In this embodiment, the two battery cells 601 in the first group of battery cells 602 are connected in series, the two battery cells 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 four battery cells 601 constitute a 2P battery cell group. Alternatively, in some embodiments, the two battery cells 601 in the first group of battery cells 602 are connected in parallel, the two battery cells 601 in the second group of battery cells 603 are connected in parallel, and the first group of battery cells 602 and the second group of battery cells 603 are connected in series, so that the four battery cells 601 can also be considered to constitute a 2P battery cell group.

[0239] In this embodiment, when the battery pack 600 is coupled to the tool host 600 a , the first group of battery cells 602 is at least partially disposed in the grip portion 604 , and the second group of battery cells 603 is located outside the grip portion 604 .

[0240] For the convenience of explanation, in this embodiment, the battery cell unit 601 in the first group of battery cells 602 can also be defined as the first battery cell unit 605, and the battery cell unit 601 in the second group of battery cells 603 can be defined as the second battery cell unit 606. Among them, the first battery cell unit 605 and the second battery cell unit 606 are both bag-shaped battery cells. The first battery cell unit 605 is partially or completely located in the holding portion 604, and the second battery cell unit 606 is located outside the holding 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 group of battery cells 602 is the same as Figure 5 The main difference is that the second group of battery cells 603 is vertically arranged at the first end of the first group of battery cells 602 away from the battery pack interface 609.

[0241] The battery pack housing 610 includes a first housing portion 611 and a second housing portion 612. Figure 3 The battery pack 100 in the embodiment of the present invention is the same as the battery pack 100 in the embodiment of the present invention, and 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, and the left housing portion 613 and the right housing portion 614 are connected to form an accommodating space for accommodating the second group of battery cells 603. The battery pack housing 610 is substantially in the shape of the letter T, so that the volume of the battery pack 600 can be reduced while increasing the capacity of the battery pack 600. Alternatively, in some embodiments, the battery pack housing 610 can also be substantially in the shape of the letter L.

[0242] like Fig.26 As shown, it can be understood that in some embodiments, the first group of battery cells 701 and the second group of battery cells 702 can be arranged along the first straight line 703 , that is, the second battery cell unit 704 is arranged below the first battery cell unit 705 .

[0243] 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, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. An electric tool, comprising: A tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing for accommodating at least a portion of the motor; A battery pack, for detachably connecting to the host housing to supply power to the motor; The tool host includes a host interface, the battery pack includes a battery pack interface that cooperates with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack also includes: Battery pack housing; A battery cell unit, disposed in the battery pack housing and electrically connected to the battery pack interface; The host housing comprises: A motor housing portion, used to accommodate at least a portion of the motor; A grip portion, for a user to hold; Wherein, the battery cell unit is a bag-shaped battery cell. When the battery pack is combined with the tool host, at least part of the battery cell unit is located in the holding portion, and the battery pack is combined with the holding portion along a first straight line direction. The circumference 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 ratio of the output power of the battery pack to the volume of the battery pack is greater than or equal to 1W / cm³.

2. The electric tool according to claim 1, characterized in that: The extended plane of the pouch-shaped battery core is substantially parallel to the first straight line.

3. The electric tool according to claim 1, characterized in that: The number of battery cell units in the battery pack shell is 2, and the capacity of the battery pack is greater than or equal to 1.5Ah.

4. The electric tool according to claim 1, characterized in that: The volume energy density of the battery pack is greater than or equal to 120mWh / cm 3 .

5. The electric tool according to claim 1, characterized in that: A perimeter of an outer contour of a 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.

6. An electric tool comprising: A tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing for accommodating at least a portion of the motor; A battery pack, for detachably connecting to the host housing to supply power to the motor; The tool host includes a host interface, the battery pack includes a battery pack interface that cooperates with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack also includes: Battery pack housing; A battery cell unit, disposed in the battery pack housing and electrically connected to the battery pack interface; The host housing comprises: A motor housing portion, used to accommodate at least a portion of the motor; A grip portion, for a user to hold; The battery cell unit is a bag-shaped battery cell. When the battery pack is combined with the tool host, at least part of the battery cell unit is located in the gripping portion. The battery pack is combined with the gripping portion along a first straight line. The perimeter of the outer contour of the cross section of the portion of the battery pack located in the gripping 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. The volume energy density of the battery pack is greater than or equal to 100 mWh / cm 3 .

7. An electric tool comprising: A tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing for accommodating at least a portion of the motor; A battery pack, for detachably connecting to the host housing to supply power to the motor; The tool host includes a host interface, the battery pack includes a battery pack interface that cooperates with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack also includes: Battery pack housing; A battery cell unit, disposed in the battery pack housing and electrically connected to the battery pack interface; The host housing comprises: A motor housing portion, used to accommodate at least a portion of the motor; A grip portion, for a user to hold; Wherein, when the battery pack is combined with the tool host, at least part of the battery cell unit is located in the holding portion, the battery pack is combined with the holding portion along a first straight line direction, the circumference 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 weight energy density of the battery pack is greater than or equal to 100 mWh / g.

8. An electric tool comprising: A tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing for accommodating at least a portion of the motor; A battery pack, for detachably connecting to the host housing to supply power to the motor; The tool host includes a host interface, the battery pack includes a battery pack interface that cooperates with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack also includes: Battery pack housing; A battery cell unit, disposed in the battery pack housing and electrically connected to the battery pack interface; The host housing comprises: A motor housing portion, used to accommodate at least a portion of the motor; A grip portion, for a user to hold; Wherein, the battery cell unit is a bag-shaped battery cell. When the battery pack is combined with the tool host, at least part of the battery cell unit is located in the holding part. The battery pack is combined with the holding part along a first straight line. The cross-sectional area of ​​the part of the battery pack located in the holding part in a plane perpendicular to the first straight line is greater than or equal to 8cm² and less than or equal to 14cm². The ratio of the output power of the battery pack to the volume of the battery pack is greater than or equal to 1W / cm³.

9. The electric tool according to claim 8, characterized in that: The nominal voltage of the battery pack is greater than or equal to 7V.

10. An electric tool comprising: A tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing for accommodating at least a portion of the motor; A battery pack, for detachably connecting to the host housing to supply power to the motor; The tool host includes a host interface, the battery pack includes a battery pack interface that cooperates with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack also includes: Battery pack housing; A battery cell unit, disposed in the battery pack housing and electrically connected to the battery pack interface; The host housing comprises: A motor housing portion, used to accommodate at least a portion of the motor; A grip portion, for a user to hold; The battery cell unit is a bag-shaped battery cell. When the battery pack is combined with the tool host, at least part of the battery cell unit is located in the gripping portion. The battery pack is combined with the gripping portion along a first straight line. The cross-sectional area of ​​the portion of the battery pack located in the gripping 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. The volume energy density of the battery pack is greater than or equal to 100 mWh / cm 3 .

11. An electric tool comprising: A tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing for accommodating at least a portion of the motor; A battery pack, for detachably connecting to the host housing to supply power to the motor; The tool host includes a host interface, the battery pack includes a battery pack interface that cooperates with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack also includes: Battery pack housing; A battery cell unit, disposed in the battery pack housing and electrically connected to the battery pack interface; The host housing comprises: A motor housing portion, used to accommodate at least a portion of the motor; A grip portion, for a user to hold; Wherein, when the battery pack is combined with the tool host, at least part of the battery cell unit is located in the holding part, the battery pack is combined with the holding part along a first straight line direction, the cross-sectional area of ​​the part of the battery pack located in the holding part in a plane perpendicular to the first straight line is greater than or equal to 8cm² and less than or equal to 14cm², and the weight energy density of the battery pack is greater than or equal to 100mWh / g.

12. An electric tool comprising: A tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing for accommodating at least a portion of the motor; A battery pack, for detachably connecting to the host housing to supply power to the motor; The tool host includes a host interface, the battery pack includes a battery pack interface that cooperates with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack also includes: Battery pack housing; A battery cell unit, disposed in the battery pack housing and electrically connected to the battery pack interface; The host housing comprises: A motor housing portion, used to accommodate at least a portion of the motor; A grip portion, for a user to hold; Wherein, when the battery pack is combined with the tool host, at least part of the battery cell unit is located in the holding part, the battery pack is combined with the holding part along a first straight line direction, the cross-sectional area of ​​the part of the battery pack located in the holding part 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 bag-shaped battery cell.

13. The electric tool according to claim 12, characterized in that: The nominal voltage of the battery pack is less than or equal to 9V.

14. The electric tool according to claim 12, characterized in that: 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.

15. The electric tool according to claim 14, characterized in that: 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.

16. An electric tool comprising: A tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing for accommodating at least a portion of the motor; A battery pack, used to supply power to the motor; Wherein, the battery pack further comprises: At least one battery cell, configured to store energy; The host housing comprises: A motor housing portion, used to accommodate at least a portion of the motor; A grip portion, for a user to hold; Among them, at least part of the battery cell unit is located in the holding portion, the holding portion extends along a first straight line direction, the extension plane of the battery cell unit is parallel to the first straight line, the cross-sectional area of ​​the holding portion in a plane perpendicular to the first straight line is greater than or equal to 13 cm² and less than or equal to 18 cm², and the battery cell unit is a bag-shaped battery cell.

17. An electric tool comprising: A tool host, comprising an output member for outputting power, a motor for driving the output member to move, and a host housing for accommodating at least a portion of the motor; A battery pack, for detachably connecting to the host housing to supply power to the motor; The tool host includes a host interface, the battery pack includes a battery pack interface that cooperates with the host interface, when the battery pack is installed on the tool host, the host interface and the battery pack interface are connected, and the battery pack also includes: Battery pack housing; A battery cell unit, disposed in the battery pack housing and electrically connected to the battery pack interface; The host housing comprises: A motor housing portion, used to accommodate at least a portion of the motor; A grip portion, for a user to hold; Wherein, when the battery pack is combined with the tool host, at least part of the battery cell unit is located in the holding portion, the battery pack is combined with the holding portion along a first straight line direction, and the circumference 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 battery cell unit is a bag-shaped battery cell.

18. The electric tool according to claim 17, characterized in that: The nominal voltage of the battery pack is less than or equal to 9V.

19. The electric tool according to claim 17, characterized in that: 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.

20. The electric tool according to claim 17, characterized in that: The battery cell unit includes a first group of battery cells and a second group of battery cells. When the battery pack is combined with the tool host, the first group of battery cells is at least partially arranged in the gripping portion, and the second group of battery cells is located outside the gripping portion.

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