ABSTRACT
Abstract
A battery pack includes a battery housing; a battery module disposed in the battery housing, where the battery module includes multiple battery cells, and at least one of the battery cells is a solid-state battery; and a control circuit disposed in the battery housing and configured to use the battery module to supply the electric power to the power tool. The energy W of the battery pack and the volume V 1 of the battery pack satisfy the following: when the energy W is greater than or equal to 200 Wh, the volume V 1 is less than or equal to 400 cm 3 ; or when the energy W is greater than or equal to 300 Wh, the volume V 1 is less than or equal to 800 cm 3 ; or when the energy W is greater than or equal to 700 Wh, the volume V 1 is less than or equal to 2500 cm 3 .
Description
RELATED APPLICATION INFORMATION
This application is a continuation of International Application Number PCT/CN2023/123875, filed on Oct. 11, 2023, through which this application also claims the benefit under 35 U.S.C. § 119(a) of Chinese Patent Application No. 202211395477.5, filed on Nov. 9, 2022, Chinese Patent Application No. 202311255477.X, filed on Sep. 26, 2023, and Chinese Patent Application No. 202311252928.4, filed on Sep. 26, 2023, which applications are incorporated herein by reference in their entireties.
TECHNICAL FIELD
The present application relates to a battery pack and a power tool, for example, a battery pack that supplies electric power to a power tool, a power tool, a power tool system, a mower, and a sander.
BACKGROUND
With the development of battery technology, engine tools are gradually replaced with power tools. In order that a cordless power tool has a better use effect, a battery pack is required to have higher output characteristics. For example, to achieve a working effect and a battery lifetime similar to those of an engine tool, increasingly higher requirements are placed on the performance of the battery pack, such as the safety performance, power density, energy density, and life.
SUMMARY
The present application provides a battery pack for supplying electric power to a power tool. The battery pack includes a battery housing, a battery module, and a control circuit. The battery module is disposed in the battery housing, where the battery module includes multiple battery cells, and at least one of the battery cells is a solid-state battery. The control circuit is disposed in the battery housing and configured to use the battery module to supply the electric power to the power tool. The energy W of the battery pack and the volume V 1 of the battery pack satisfy the following: in the case where the energy W of the battery pack is greater than or equal to 200 watt-hours, the volume V 1 of the battery pack is less than or equal to 400 cm 3 ; or in the case where the energy W of the battery pack is greater than or equal to 300 watt-hours, the volume V 1 of the battery pack is less than or equal to 800 cm 3 ; or in the case where the energy W of the battery pack is greater than or equal to 700 watt-hours, the volume V 1 of the battery pack is less than or equal to 2500 cm 3 .
In some examples, in the case where the energy W of the battery pack is greater than or equal to 350 watt-hours, the weight M 1 of the battery pack is less than or equal to 10 kg.
In some examples, the voltage of the battery pack is higher than or equal to 18 volts.
In some examples, the ratio of the energy W of the battery pack to the volume V 1 of the battery pack satisfies the relation: 0.2 Wh/cm 3 â¤W/V 1 â¤1 Wh/cm 3 .
In some examples, the ratio of the energy W of the battery pack to the weight M 1 of the battery pack satisfies the relation: 35 Wh/kgâ¤W/M 1 â¤1 Wh/kg.
In some examples, the ratio of the volume V 1 of the battery pack to the volume V 2 of the battery module satisfies the relation: 1â¤V 1 /V 2 â¤5.
In some examples, the length L 2 , width W 2 , and height H 2 of the battery module satisfy the relations: 1â¤L 2 /W 2 â¤2, 1â¤L 2 /H 2 â¤2, and 0.5â¤W 2 /H 2 â¤1.5.
In some examples, the length L 2 , width W 2 , and height H 2 of the battery module satisfy the relations: 6 cmâ¤L 2 â¤20 cm, 5 cmâ¤H 2 â¤15 cm, and 5 cmâ¤W 2 â¤15 cm.
In some examples, the length L 3 , width W 3 , and height H 3 of each of the multiple battery cells satisfy the relations: 10â¤L 3 /W 3 â¤100, 10â¤L 3 /H 3 â¤100, and 0.5â¤W 3 /H 3 â¤2.
In some examples, the length L 3 , width W 3 , and height H 3 of each of the multiple battery cells satisfy the relations: 300 mmâ¤L 3 â¤900 mm, 10 mmâ¤H 3 â¤40 mm, and 10 mmâ¤W 3 â¤40 mm.
The present application provides a battery pack for supplying electric power to a power tool. The battery pack includes a battery housing, a battery module, a first interface, a second interface, and a control circuit. The battery module is disposed in the battery housing, where the battery module includes multiple battery cells, and at least one of the battery cells is a solid-state battery. The first interface is configured to connect the power tool. The second interface is configured to access external electric power for the battery pack. The control circuit is disposed in the battery housing, where the control circuit is electrically connected to the battery module, the first interface, and the second interface separately and is configured to use the battery module or the external electric power to supply the electric power to the power tool.
In some examples, the external electric power is an alternating current.
In some examples, the external electric power is a direct current supplied by an external energy storage device, and the external energy storage device is independent of the battery pack.
In some examples, the external energy storage device is a lithium-ion battery pack.
In some examples, the external energy storage device is a sodium-ion battery pack.
In some examples, the external energy storage device is a battery pack constituted of both a lithium-ion battery and a sodium-ion battery.
In some examples, the external energy storage device is a solid-state battery pack.
In some examples, the first interface and the second interface are on different planes.
In some examples, the first interface and the second interface are on two opposite surfaces of the battery housing.
In some examples, the control circuit is configured to, after the second interface accesses the external electric power, control part of the external electric power to supply electric power to the power tool, control the battery pack to stop supplying the electric power to the power tool, and control part of the external electric power to charge the battery pack.
The present application provides a power tool. The power tool includes a tool body and the battery pack in any one of the preceding examples. The tool body includes a tool housing, an electric motor, and a driver circuit. The electric motor is disposed in the tool housing. The driver circuit is electrically connected to the electric motor and is configured to drive the electric motor. The battery pack is configured to power the driver circuit.
In some examples, the weight of the battery pack is less than or equal to 70% of the weight of the tool body.
In some examples, the tool body further includes a transmission unit configured to transmit power outputted by the electric motor.
In some examples, a projection of the center of gravity of the power tool on a horizontal plane falls within the range of a projection of the battery pack on the horizontal plane.
In some examples, the operable temperature range of the power tool is from â50 degrees Celsius to 90 degrees Celsius.
In some examples, the tool housing includes a grip to be held.
In some examples, the battery pack partially overlaps the grip.
In some examples, the battery pack and the tool body are detachable and mountable relative to each other.
In some examples, the electric motor is a direct current motor.
The present application provides a power tool. The power tool includes a tool body and a battery pack. The tool body includes a tool housing, an electric motor, and a driver circuit. The electric motor is disposed in the tool housing. The driver circuit is electrically connected to the electric motor and is configured to drive the electric motor. The battery pack is configured to power the driver circuit. The battery pack includes a battery housing, a battery module, and a control circuit. The battery module is disposed in the battery housing, where the battery module includes multiple battery cells, and at least one of the battery cells is a solid-state battery. The control circuit is disposed in the battery housing and configured to use the battery module to supply electric power to the power tool. The weight of the battery pack is less than or equal to 70% of the weight of the tool body.
The present application provides a power tool. The power tool includes a tool body and a battery pack assembly. The tool body includes a tool housing, an electric motor, and a driver circuit. The electric motor is disposed in the tool housing. The driver circuit is electrically connected to the electric motor and is configured to drive the electric motor. The battery pack assembly is configured to power the driver circuit. The battery pack assembly includes a first battery pack and a second battery pack. The first battery pack is configured to power at least the driver circuit, the first battery pack includes multiple battery cells, and at least one of the battery cells is configured as a solid-state battery. The second battery pack is configured to power at least one of the first battery pack and the driver circuit.
In some examples, the second battery pack includes multiple battery cells, and at least one of the battery cells is configured as a solid-state battery.
In some examples, the second battery pack includes multiple battery cells, and at least one of the battery cells is configured as a liquid-state battery.
The present application provides a power tool system. The power tool system includes a tool body, a first battery pack, and a second battery pack. The tool body includes a tool interface configured to access electric power. The first battery pack includes a first battery pack housing and a first battery module disposed in the first battery pack housing, where the first battery module includes at least one first battery cell, and each of the at least one first battery cell is a liquid-state battery. The second battery pack includes a second battery pack housing and a second battery module disposed in the second battery pack housing, where the second battery module includes at least one second battery cell, and each of the at least one second battery cell is a solid-state battery. The first battery pack has a first battery interface that matches the tool interface to allow the first battery pack to power the tool body, and the second battery pack has a second battery interface that matches the tool interface to allow the second battery pack to power the tool body.
The present application provides a power tool. The power tool includes a tool body and a second battery pack. The tool body is configured to match a first battery pack so that the tool body is powered through the first battery pack, where the first battery pack includes a first battery pack housing and a first battery module disposed in the first battery pack housing, the first battery module includes at least one first battery cell, and each of the at least one first battery cell is a liquid-state battery. The second battery pack includes a second battery pack housing and a second battery module disposed in the second battery pack housing, the second battery module includes at least one second battery cell, and each of the at least one second battery cell is a solid-state battery. The second battery pack has a second battery interface that matches a tool interface on the tool body to allow the second battery pack to power the tool body.
The present application provides a mower. The mower includes a machine housing, a first electric motor, a travelling device, a second electric motor, a cutting assembly, and an energy storage device. The first electric motor is accommodated in the machine housing, where the first electric motor is a direct current motor. The travelling device includes driving wheels, where the driving wheels are driven by the first electric motor. The second electric motor is accommodated in the machine housing, where the second electric motor is a direct current motor. The cutting assembly includes a blade, where the blade is driven by the second electric motor. The energy storage device is configured to power the first electric motor and the second electric motor. The energy storage device includes an energy storage unit. The energy storage unit includes a solid-state battery.
In some examples, the operable temperature range of the mower is from â20 degrees Celsius to 90 degrees Celsius.
In some examples, the mower further includes a charging port, where the charging port is configured to be connected to another electrical energy source for charging.
In some examples, a charging rate of the mower is from 3 C to 10 C.
In some examples, the energy storage device is a sealed device.
In some examples, the mower is configured to determine an electric quantity of the energy storage device, and in the case where the energy storage device has a small electric quantity, the mower is capable of automatically travelling to a charging pile to be charged.
The present application provides a sander. The sander includes a sander body and a battery pack. The sander body includes a tool housing, an electric motor, and a battery pack interface. The tool housing includes a grip. The electric motor is disposed in the tool housing. The battery pack interface is disposed on the tool housing. The battery pack includes a battery cell and a tool interface. The battery cell includes a solid-state battery. The tool interface is configured to be coupled to the battery pack interface.
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RELATED APPLICATION INFORMATION
This application is a continuation of International Application Number PCT/CN2023/123875, filed on Oct. 11, 2023, through which this application also claims the benefit under 35 U.S.C. § 119(a) of Chinese Patent Application No. 202211395477.5, filed on Nov. 9, 2022, Chinese Patent Application No. 202311255477.X, filed on Sep. 26, 2023, and Chinese Patent Application No. 202311252928.4, filed on Sep. 26, 2023, which applications are incorporated herein by reference in their entireties.
TECHNICAL FIELD
The present application relates to a battery pack and a power tool, for example, a battery pack that supplies electric power to a power tool, a power tool, a power tool system, a mower, and a sander.
BACKGROUND
With the development of battery technology, engine tools are gradually replaced with power tools. In order that a cordless power tool has a better use effect, a battery pack is required to have higher output characteristics. For example, to achieve a working effect and a battery lifetime similar to those of an engine tool, increasingly higher requirements are placed on the performance of the battery pack, such as the safety performance, power density, energy density, and life.
SUMMARY
The present application provides a battery pack for supplying electric power to a power tool. The battery pack includes a battery housing, a battery module, and a control circuit. The battery module is disposed in the battery housing, where the battery module includes multiple battery cells, and at least one of the battery cells is a solid-state battery. The control circuit is disposed in the battery housing and configured to use the battery module to supply the electric power to the power tool. The energy W of the battery pack and the volume V 1 of the battery pack satisfy the following: in the case where the energy W of the battery pack is greater than or equal to 200 watt-hours, the volume V 1 of the battery pack is less than or equal to 400 cm 3 ; or in the case where the energy W of the battery pack is greater than or equal to 300 watt-hours, the volume V 1 of the battery pack is less than or equal to 800 cm 3 ; or in the case where the energy W of the battery pack is greater than or equal to 700 watt-hours, the volume V 1 of the battery pack is less than or equal to 2500 cm 3 .
In some examples, in the case where the energy W of the battery pack is greater than or equal to 350 watt-hours, the weight M 1 of the battery pack is less than or equal to 10 kg.
In some examples, the voltage of the battery pack is higher than or equal to 18 volts.
In some examples, the ratio of the energy W of the battery pack to the volume V 1 of the battery pack satisfies the relation: 0.2 Wh/cm 3 â¤W/V 1 â¤1 Wh/cm 3 .
In some examples, the ratio of the energy W of the battery pack to the weight M 1 of the battery pack satisfies the relation: 35 Wh/kgâ¤W/M 1 â¤1 Wh/kg.
In some examples, the ratio of the volume V 1 of the battery pack to the volume V 2 of the battery module satisfies the relation: 1â¤V 1 /V 2 â¤5.
In some examples, the length L 2 , width W 2 , and height H 2 of the battery module satisfy the relations: 1â¤L 2 /W 2 â¤2, 1â¤L 2 /H 2 â¤2, and 0.5â¤W 2 /H 2 â¤1.5.
In some examples, the length L 2 , width W 2 , and height H 2 of the battery module satisfy the relations: 6 cmâ¤L 2 â¤20 cm, 5 cmâ¤H 2 â¤15 cm, and 5 cmâ¤W 2 â¤15 cm.
In some examples, the length L 3 , width W 3 , and height H 3 of each of the multiple battery cells satisfy the relations: 10â¤L 3 /W 3 â¤100, 10â¤L 3 /H 3 â¤100, and 0.5â¤W 3 /H 3 â¤2.
In some examples, the length L 3 , width W 3 , and height H 3 of each of the multiple battery cells satisfy the relations: 300 mmâ¤L 3 â¤900 mm, 10 mmâ¤H 3 â¤40 mm, and 10 mmâ¤W 3 â¤40 mm.
The present application provides a battery pack for supplying electric power to a power tool. The battery pack includes a battery housing, a battery module, a first interface, a second interface, and a control circuit. The battery module is disposed in the battery housing, where the battery module includes multiple battery cells, and at least one of the battery cells is a solid-state battery. The first interface is configured to connect the power tool. The second interface is configured to access external electric power for the battery pack. The control circuit is disposed in the battery housing, where the control circuit is electrically connected to the battery module, the first interface, and the second interface separately and is configured to use the battery module or the external electric power to supply the electric power to the power tool.
In some examples, the external electric power is an alternating current.
In some examples, the external electric power is a direct current supplied by an external energy storage device, and the external energy storage device is independent of the battery pack.
In some examples, the external energy storage device is a lithium-ion battery pack.
In some examples, the external energy storage device is a sodium-ion battery pack.
In some examples, the external energy storage device is a battery pack constituted of both a lithium-ion battery and a sodium-ion battery.
In some examples, the external energy storage device is a solid-state battery pack.
In some examples, the first interface and the second interface are on different planes.
In some examples, the first interface and the second interface are on two opposite surfaces of the battery housing.
In some examples, the control circuit is configured to, after the second interface accesses the external electric power, control part of the external electric power to supply electric power to the power tool, control the battery pack to stop supplying the electric power to the power tool, and control part of the external electric power to charge the battery pack.
The present application provides a power tool. The power tool includes a tool body and the battery pack in any one of the preceding examples. The tool body includes a tool housing, an electric motor, and a driver circuit. The electric motor is disposed in the tool housing. The driver circuit is electrically connected to the electric motor and is configured to drive the electric motor. The battery pack is configured to power the driver circuit.
In some examples, the weight of the battery pack is less than or equal to 70% of the weight of the tool body.
In some examples, the tool body further includes a transmission unit configured to transmit power outputted by the electric motor.
In some examples, a projection of the center of gravity of the power tool on a horizontal plane falls within the range of a projection of the battery pack on the horizontal plane.
In some examples, the operable temperature range of the power tool is from â50 degrees Celsius to 90 degrees Celsius.
In some examples, the tool housing includes a grip to be held.
In some examples, the battery pack partially overlaps the grip.
In some examples, the battery pack and the tool body are detachable and mountable relative to each other.
In some examples, the electric motor is a direct current motor.
The present application provides a power tool. The power tool includes a tool body and a battery pack. The tool body includes a tool housing, an electric motor, and a driver circuit. The electric motor is disposed in the tool housing. The driver circuit is electrically connected to the electric motor and is configured to drive the electric motor. The battery pack is configured to power the driver circuit. The battery pack includes a battery housing, a battery module, and a control circuit. The battery module is disposed in the battery housing, where the battery module includes multiple battery cells, and at least one of the battery cells is a solid-state battery. The control circuit is disposed in the battery housing and configured to use the battery module to supply electric power to the power tool. The weight of the battery pack is less than or equal to 70% of the weight of the tool body.
The present application provides a power tool. The power tool includes a tool body and a battery pack assembly. The tool body includes a tool housing, an electric motor, and a driver circuit. The electric motor is disposed in the tool housing. The driver circuit is electrically connected to the electric motor and is configured to drive the electric motor. The battery pack assembly is configured to power the driver circuit. The battery pack assembly includes a first battery pack and a second battery pack. The first battery pack is configured to power at least the driver circuit, the first battery pack includes multiple battery cells, and at least one of the battery cells is configured as a solid-state battery. The second battery pack is configured to power at least one of the first battery pack and the driver circuit.
In some examples, the second battery pack includes multiple battery cells, and at least one of the battery cells is configured as a solid-state battery.
In some examples, the second battery pack includes multiple battery cells, and at least one of the battery cells is configured as a liquid-state battery.
The present application provides a power tool system. The power tool system includes a tool body, a first battery pack, and a second battery pack. The tool body includes a tool interface configured to access electric power. The first battery pack includes a first battery pack housing and a first battery module disposed in the first battery pack housing, where the first battery module includes at least one first battery cell, and each of the at least one first battery cell is a liquid-state battery. The second battery pack includes a second battery pack housing and a second battery module disposed in the second battery pack housing, where the second battery module includes at least one second battery cell, and each of the at least one second battery cell is a solid-state battery. The first battery pack has a first battery interface that matches the tool interface to allow the first battery pack to power the tool body, and the second battery pack has a second battery interface that matches the tool interface to allow the second battery pack to power the tool body.
The present application provides a power tool. The power tool includes a tool body and a second battery pack. The tool body is configured to match a first battery pack so that the tool body is powered through the first battery pack, where the first battery pack includes a first battery pack housing and a first battery module disposed in the first battery pack housing, the first battery module includes at least one first battery cell, and each of the at least one first battery cell is a liquid-state battery. The second battery pack includes a second battery pack housing and a second battery module disposed in the second battery pack housing, the second battery module includes at least one second battery cell, and each of the at least one second battery cell is a solid-state battery. The second battery pack has a second battery interface that matches a tool interface on the tool body to allow the second battery pack to power the tool body.
The present application provides a mower. The mower includes a machine housing, a first electric motor, a travelling device, a second electric motor, a cutting assembly, and an energy storage device. The first electric motor is accommodated in the machine housing, where the first electric motor is a direct current motor. The travelling device includes driving wheels, where the driving wheels are driven by the first electric motor. The second electric motor is accommodated in the machine housing, where the second electric motor is a direct current motor. The cutting assembly includes a blade, where the blade is driven by the second electric motor. The energy storage device is configured to power the first electric motor and the second electric motor. The energy storage device includes an energy storage unit. The energy storage unit includes a solid-state battery.
In some examples, the operable temperature range of the mower is from â20 degrees Celsius to 90 degrees Celsius.
In some examples, the mower further includes a charging port, where the charging port is configured to be connected to another electrical energy source for charging.
In some examples, a charging rate of the mower is from 3 C to 10 C.
In some examples, the energy storage device is a sealed device.
In some examples, the mower is configured to determine an electric quantity of the energy storage device, and in the case where the energy storage device has a small electric quantity, the mower is capable of automatically travelling to a charging pile to be charged.
The present application provides a sander. The sander includes a sander body and a battery pack. The sander body includes a tool housing, an electric motor, and a battery pack interface. The tool housing includes a grip. The electric motor is disposed in the tool housing. The battery pack interface is disposed on the tool housing. The battery pack includes a battery cell and a tool interface. The battery cell includes a solid-state battery. The tool interface is configured to be coupled to the battery pack interface.
In some examples, the battery pack partially overlaps the grip.
In some examples, the battery pack and the sander body are detached and mounted relative to each other.
In some examples, the electric motor is a direct current motor.
In the examples of the present application, the battery pack includes the multiple battery cells, and at least one of the battery cells is the solid-state battery.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic view of application scenarios of a battery pack in the present application;
FIG. 2 is a perspective view of a power tool according to an example of the present application from a viewing angle;
FIG. 3 is a plan view of the power tool in FIG. 2 from a viewing angle;
FIG. 4 is a structural view of the power tool in FIG. 2 from a viewing angle;
FIG. 5 is a perspective view of a battery pack according to an example of the present application from a viewing angle;
FIG. 6 is an exploded view of a battery pack according to an example of the present application from a viewing angle;
FIG. 7 is a perspective view of a battery cell in FIG. 6 from a viewing angle;
FIG. 8 is a perspective view of a battery pack according to an example of the present application from a viewing angle;
FIG. 9 is an exploded view of a battery pack according to an example of the present application from a viewing angle;
FIG. 10 is a plan view of a power tool according to an example of the present application from a viewing angle;
FIG. 11 is a perspective view of a tool body in FIG. 10 from a viewing angle;
FIG. 12 is a perspective view of a power tool system according to an example of the present application from a viewing angle;
FIG. 13 is a plan view of a power tool according to an example of the present application from a viewing angle;
FIG. 14 is a perspective view of a mower according to an example of the present application from a viewing angle;
FIG. 15 is a schematic view showing part of the structures of the mower in FIG. 14 ;
FIG. 16 is a schematic view of a sander operated manually according to an example of the present application;
FIG. 17 is a perspective view of a sander according to an example of the present application from a viewing angle; and
FIG. 18 is a sectional view of the sander in FIG. 17 .
DETAILED DESCRIPTION
The present application is described below in conjunction with drawings and examples.
It is to be understood by those skilled in the art that in the disclosure of the present application, orientations or position relations indicated by terms such as âupâ, âdownâ, âfrontâ, ârearâ, âleftâ, and ârightâ are based on the drawings. These orientations or position relations are intended only to facilitate and simplify the description of the present application and not to indicate or imply that a device or element referred to must have such particular orientations or must be configured or operated in such particular orientations. Thus, the terms are not to be construed as limiting the present application.
As shown in FIG. 1 , a power tool 10 in the present application may be a handheld power tool, a garden tool, or a garden vehicle such as a vehicle-type mower, which is not limited herein. The power tool 10 in the present application includes, but is not limited to, a power tool that requires speed regulation, such as a screwdriver, an electric drill, a wrench, and an angle grinder, a sander and another power tool that may be used for grinding workpieces, a reciprocating saw, a circular saw, a jigsaw and the like that may be used for cutting workpieces, and an electric hammer and another power tool that may be used for impact. These tools may also be garden tools, such as pruners, chainsaws, and vehicle-type mowers. As long as these power tools can adopt the essence of the technical solutions disclosed below, these power tools are within the scope of the present application.
As shown in FIGS. 1 to 4 , the power tool 10 includes a battery pack 100 and a tool body 200 . The battery pack 100 is configured to supply electric power to the tool body 200 . As shown in FIG. 4 , the tool body 200 of the power tool 10 includes at least a tool housing 210 , an electric motor 220 , and a driver circuit 230 . The electric motor 220 is disposed in the tool housing 210 . The driver circuit 230 is electrically connected to the electric motor 220 and drives the electric motor 220 . As shown in FIGS. 5 to 7 , as an energy storage device, the battery pack 100 is configured to store electrical energy to power the power tool 10 . The present application does not limit the shape of the battery pack 100 . The battery pack 100 may be in the shape shown in FIG. 5 , may be similar to a cuboid, or may be a cylinder or another three-dimensional structure.
In this example, as shown in FIG. 5 , the battery pack 100 has a battery housing 110 . A terminal assembly 120 is disposed on the battery housing 110 . The terminal assembly 120 is connectable to terminals on the power tool 10 , a charger, or an adapter to output the electrical energy stored in the battery pack 100 to the power tool 10 or to charge the battery pack 100 through the charger. In an example, the terminal assembly 120 may include connecting terminals such as a positive terminal, a negative terminal, and a communication terminal. In this example, the terminal assembly 120 is electrically connected to a battery module 130 in the battery pack 100 so that electric power stored in battery cells 131 can be transmitted to the power tool 10 connected to the terminal assembly 120 or electric power transmitted by the charger is transmitted to the battery cells 131 to charge the battery cells 131 . In an example, as shown in FIG. 4 , the battery pack 100 also has a control circuit 140 . The control circuit 140 is disposed in the battery housing 110 . The control circuit 140 is electrically connected to the battery module 130 and the tool body 200 . The control circuit 140 uses the battery module 130 to supply the electric power to the tool body 200 .
In an example, the battery pack 100 may include the battery module 130 . The battery module 130 may be understood as an intermediate unit constituted by the multiple battery cells 131 connected in series and parallel, where the intermediate unit is between a battery cell 131 and the battery pack 100 . Each of the battery cells 131 , also referred to as a cell, is the smallest unit of a battery system and is mainly constituted by a positive electrode, a negative electrode, an electrolyte, a separator, and a cell housing. The present application does not limit the shape of each of the battery cells 131 . Each of the battery cells 131 may be in the shapes shown in FIGS. 6 and 7 , may be similar to a cuboid, or may be a cylinder or another three-dimensional structure.
According to the materials of the electrolytes in the battery cells 131 , the batteries may be classified into solid-state batteries and liquid-state batteries. A solid-state battery refers to a battery that uses a solid electrolyte. A liquid-state battery refers to a battery that uses a liquid electrolyte. Most of the battery packs used in power tools on the market are liquid-state lithium-ion batteries. Compared with traditional liquid-state lithium-ion batteries, solid-state batteries have the characteristics of being non-flammable, high temperature-resistant, non-corrosive, and non-volatile, avoiding phenomena such as electrolyte leakage and a short circuit of electrodes in traditional liquid-state batteries. Thus, the sensitivity of the battery module to a temperature is reduced, thereby significantly reducing safety risks.
In the examples of the present application, the battery pack 130 includes the multiple battery cells 131 , and at least one of the battery cells 131 is a solid-state battery. A battery pack with solid-state batteries has the advantages of high energy density, good safety performance, and a long cycle life. Therefore, the battery pack 100 provided by the present application can supply a larger electric quantity to the power tool 10 , has a long service life, and provides safer user experience than a traditional battery pack in the same volume.
The energy of a battery refers to electrical energy outputted by the battery doing work under a certain discharging condition, commonly expressed in a watt-hour (W·h) or a kilowatt-hour (kW·h). The battery pack is used as a power source of the power tool, so the energy and volume of the battery pack are two critical factors that affect user experience. A battery pack with a small volume and a large amount of energy is more convenient for a user to use. In the present application, the solid-state batteries are used as the energy storage device so that the battery pack 100 has a small volume. In addition, the battery pack 100 including the solid-state batteries is used as the power source of the power tool 10 , which favors the miniaturization and light loading of the power tool 10 and thus favors the use of the user.
In the examples of the present application, if the energy W of the battery pack 100 is set to be greater than or equal to 350 watt-hours and the volume V 1 of the battery pack 100 is set to be less than or equal to 700 cm 3 , the power tool 10 can satisfy both the user's energy requirement and the user's volume requirement on the power tool 10 . Moreover, further facilitation of the miniaturization of the power tool 10 is favored.
In some examples, when the energy W of the battery pack 100 is greater than or equal to 200 Wh, the volume V 1 of the battery pack 100 is less than or equal to 400 cm 3 . In an example, the voltage of the battery pack 100 may be 18 volts (V) or 20 volts, the capacity of the battery pack 100 may be 8 ampere-hours (A·h), and the volume of the battery pack 100 may be less than or equal to 370 cm 3 . In other examples, optionally, the energy of the battery pack 100 may be 100 Wh, 144 Wh, 150 Wh, 160 Wh, or 200 Wh, and the volume of the battery pack 100 may be 200 cm 3 , 288 cm 3 , 300 cm 3 , 320 cm 3 , 350 cm 3 , or 400 cm 3 .
In some examples, when the energy W of the battery pack 100 is greater than or equal to 300 Wh, the volume V 1 of the battery pack 100 is less than or equal to 800 cm 3 . In an example, the voltage of the battery pack 100 may be 24 volts, the capacity of the battery pack 100 may be 12 ampere-hours, and the volume of the battery pack 100 may be less than or equal to 800 cm 3 . In other examples, optionally, the energy of the battery pack 100 may be 288 Wh, 300 Wh, 350 Wh, or 400 Wh, and the volume of the battery pack 100 may be 700 cm 3 , 768 cm 3 , 780 cm 3 , or 800 cm 3 .
In some examples, when the energy W of the battery pack 100 is greater than or equal to 700 Wh, the volume V 1 of the battery pack 100 is less than or equal to 2500 cm 3 . In an example, the voltage of the battery pack 100 may be 56 volts, the capacity of the battery pack 100 may be 12 ampere-hours, and the volume of the battery pack 100 may be less than or equal to 2500 cm 3 . In other examples, optionally, the energy of the battery pack 100 may be 700 Wh, 800 Wh, 900 Wh, or 1000 Wh, and the volume of the battery pack 100 may be 1500 cm 3 , 1780 cm 3 , 2000 cm 3 , or 2500 cm 3 .
The preceding examples can also enable the power tool 10 to satisfy both the user's energy requirement and the user's volume requirement on the power tool 10 . Moreover, the further facilitation of the miniaturization of the power tool is favored.
In the examples of the present application, if the energy W of the battery pack 100 is set to be greater than or equal to 350 watt-hours and the weight M 1 of the battery pack 100 is set to be less than or equal to 10 kg, the power tool 10 can satisfy both the user's energy requirement and the user's volume requirement on the power tool 10 . Moreover, further facilitation of lightweight design of the power tool 10 is favored.
The battery pack is a mature energy storage device, so it is very difficult to change the structure or manufacturing process of the battery pack. In the examples of the present application, if the ratio of the energy W of the battery pack 100 to the volume V 1 of the battery pack 100 is set to satisfy the relation: 0.1 Wh/cm 3 â¤W/V 1 â¤1 Wh/cm 3 , or the ratio of the energy W of the battery pack 100 to the weight M 1 of the battery pack 100 is set to satisfy the relation: 1 Wh/kgâ¤W/M 1 â¤35 Wh/kg, the user's requirements for the miniaturization and light loading of the power tool 10 can be not only satisfied but also are not difficult to fulfil since the requirements are not excessively high. In some examples, the ratio of the energy W of the battery pack 100 to the volume V 1 of the battery pack 100 may be set to 0.1 Wh/cm 3 , 0.17 Wh/cm 3 , 0.21 Wh/cm 3 , 0.24 Wh/cm 3 , 0.26 Wh/cm 3 , 0.28 Wh/cm 3 , 0.33 Wh/cm 3 , 0.36 Wh/cm 3 , 0.41 Wh/cm 3 , 0.43 Wh/cm 3 , 0.45 Wh/cm 3 , 0.53 Wh/cm 3 , 0.62 Wh/cm 3 , 0.71 Wh/cm 3 , 0.83 Wh/cm 3 , or 0.92 Wh/cm 3 .
The higher the voltage of the battery pack 100 , the higher the power of the power tool 10 . In the examples of the present application, if the voltage of the battery pack 100 is set to be higher than or equal to 18 volts, the working requirements of the power tool 10 in most working conditions can be satisfied.
In addition to the battery module 130 , functional components are also typically included in the battery pack 100 such as the terminal assembly 120 , a battery monitoring and management device, a current transmission member, and assemblies for collecting and transmitting electrical signals and temperature signals. These functional components occupy part of the volume of the battery pack 100 , and the battery module 130 occupies the remaining majority of the volume. For the battery pack 100 , the higher the ratio of the volume V 2 of the battery module 130 to the volume V 1 of the battery pack 100 , the higher the volumetric energy density of the battery pack 100 . However, this also imposes stricter requirements for the miniaturization of the functional components in the battery pack 100 , making it more difficult to improve the structure in the existing <figure-callout id="100" label
CLAIMS
Claims ( 20 )
What is claimed is:
1 . A battery pack for supplying electric power to a power tool, comprising:
a battery housing; a battery module disposed in the battery housing and comprising a plurality of battery cells at least one of which is a solid-state battery; and a control circuit disposed in the battery housing and configured to use the battery module to supply the electric power to the power tool; wherein an energy W of the battery pack and a volume V 1 of the battery pack satisfy the following: when the energy W of the battery pack is greater than or equal to 200 Wh, the volume V 1 of the battery pack is less than or equal to 400 cm 3 ; or when the energy W of the battery pack is greater than or equal to 300 Wh, the volume V 1 of the battery pack is less than or equal to 800 cm 3 ; or when the energy W of the battery pack is greater than or equal to 700 Wh, the volume V 1 of the battery pack is less than or equal to 2500 cm 3 .
2 . The battery pack according to claim 1 , wherein, when the energy W of the battery pack is greater than or equal to 350 Wh, a weight M 1 of the battery pack is less than or equal to 10 kg.
3 . The battery pack according to claim 1 , wherein a voltage of the battery pack is higher than or equal to 18 volts.
4 . The battery pack according to claim 1 , wherein a ratio of the energy W of the battery pack to the volume V 1 of the battery pack satisfies a relation: 0.2 Wh/cm 3 â¤W/V 1 â¤1 Wh/cm 3 .
5 . The battery pack according to claim 1 , wherein a ratio of the energy W of the battery pack to a weight M 1 of the battery pack satisfies a relation: 1 Wh/kgâ¤W/M 1 â¤35 Wh/kg.
6 . The battery pack according to claim 1 , wherein a ratio of the volume V 1 of the battery pack to a volume V 2 of the battery module satisfies a relation: 1â¤V 1 /V 2 â¤5.
7 . The battery pack according to claim 1 , wherein a length L 2 , a width W 2 , and a height H 2 of the battery module satisfy relations: 1â¤L 2 /W 2 â¤2, 1â¤L 2 /H 2 â¤2, and 0.5â¤W 2 /H 2 â¤1.5.
8 . The battery pack according to claim 1 , wherein a length L 2 , a width W 2 , and a height H 2 of the battery module satisfy relations: 6 cmâ¤L 2 â¤20 cm, 5 cmâ¤H 2 â¤15 cm, and 5 cmâ¤W 2 â¤15 cm.
9 . The battery pack according to claim 1 , wherein a length L 3 , a width W 3 , and a height H 3 of each of the plurality of battery cells satisfy relations: 10â¤L 3 /W 3 â¤100, 10â¤L 3 /H 3 â¤100, and 0.5â¤W 3 /H 3 â¤2.
10 . The battery pack according to claim 1 , wherein a length L 3 , a width W 3 , and a height H 3 of each of the plurality of battery cells satisfy relations: 300 mmâ¤L 3 â¤900 mm, 10 mmâ¤H 3 â¤40 mm, and 10 mmâ¤W 3 â¤40 mm.
11 . The battery pack according to claim 1 , wherein the plurality of battery cells further includes a least one liquid-state battery.
12 . A battery pack for supplying electric power to a power tool, comprising:
a battery housing; a battery module disposed in the battery housing and comprising a plurality of battery cells at least one of which is a solid-state battery; a first interface configured to connect the power tool; a second interface configured to access external electric power for the battery pack; and a control circuit disposed in the battery housing, electrically connected to the battery module, the first interface, and the second interface separately, and configured to use the battery module or the external electric power to supply the electric power to the power tool.
13 . The battery pack according to claim 12 , wherein the external electric power is an alternating current.
14 . The battery pack according to claim 12 , wherein the external electric power is a direct current supplied by an external energy storage device, and the external energy storage device is independent of the battery pack.
15 . The battery pack according to claim 14 , wherein the external energy storage device is a lithium-ion battery pack, or a sodium-ion battery pack, or a battery pack constituted of both a lithium-ion battery and a sodium-ion battery, or a solid-state battery pack.
16 . The battery pack according to claim 12 , wherein the control circuit is configured to, after the second interface accesses the external electric power, control part of the external electric power to supply electric power to the power tool, control the battery pack to stop supplying the electric power to the power tool, and control part of the external electric power to charge the battery pack.
17 . A power tool, comprising:
a tool body comprising a tool housing, an electric motor disposed in the tool housing, and a driver circuit electrically connected to the electric motor and configured to drive the electric motor; and a battery pack, configured to power the tool body, comprising a battery housing, a battery module disposed in the battery housing and comprising a plurality of battery cells at least one of which is a solid-state battery, and a control circuit disposed in the battery housing and configured to use the battery module to supply the electric power to the power tool.
18 . The power tool according to claim 17 , wherein a weight of the battery pack is less than or equal to 70% of a weight of the tool body.
19 . The power tool according to claim 17 , further comprising a second battery pack, configured to power at least one of the battery pack and the driver circuit, comprising a plurality of second battery cells at least one of which is configured as a liquid-state battery.
20 . The power tool according to claim 17 , further comprising a second battery pack comprising a second battery pack housing and a second battery module, disposed in the second battery pack housing, comprising a least one second battery cell, wherein the at least one second battery cell is a liquid-state battery, the battery pack has a first battery interface that matches the tool body to allow the battery pack to power the tool body, and the second battery pack has a second battery interface that matches the tool body to allow the second battery pack to power the tool body.
US19/088,132
2022-11-09
2025-03-24
Battery pack and power tool
Pending
US20250226511A1
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2022-11-09
CN202211395477
2022-11-09
CN202311252928.4
2023-09-26
CN202311252928.4A
CN118017118A
( en )
2022-11-09
2023-09-26
Power tools and power tool systems
CN202311255477.XA
CN118017114A
( en )
2022-11-09
2023-09-26
Power tools, battery packs for powering power tools
CN202311255477.X
2023-09-26
PCT/CN2023/123875
WO2024099018A1
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2022-11-09
2023-10-11
Battery pack, electric tool, electric tool system, lawn mower and sanding machine
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Battery pack, electric tool, electric tool system, lawn mower and sanding machine
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2024-05-16
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