CN218568949U

CN218568949U - Battery pack

Info

Publication number: CN218568949U
Application number: CN202221518535.4U
Authority: CN
Inventors: 许乃前
Original assignee: Zhejiang Qixiang Technology Co Ltd
Current assignee: Zhejiang Qixiang Technology Co Ltd
Priority date: 2021-09-10
Filing date: 2022-06-16
Publication date: 2023-03-03
Anticipated expiration: 2032-06-16
Also published as: CN219086045U; CN115799668A; CN115799669A

Abstract

The present disclosure provides a battery pack applied to an electric tool. The battery pack includes a housing and a charging terminal of the housing configured to power the battery pack. The height of the shell is C and an accommodating space is formed by enclosing. The accommodating space is internally provided with a battery pack, a first electric connector and a second electric connector. The battery pack comprises a plurality of battery cell components which are distributed side by side along the length direction of the shell, and the height of the battery pack along the height direction of the shell is c. The first electrical connector is electrically connected to the battery pack and configured to charge the power tool. The second electrical connector is electrically connected to the battery pack and configured to charge an electronic device. Wherein C is more than C and less than or equal to 1.5C. The battery pack in the technical scheme is provided with a charging end, is compact in structure and can be directly adapted to the existing electric tool.

Description

Battery pack

Technical Field

The present disclosure relates to the field of electric tools, and more particularly, to a battery pack for an electric tool.

Background

In recent years, with the increasing dependence on electric tools, battery packs have become popular that can free the normal operation of electric tools from the positional restrictions of power plugs.

In the initial development stage of the battery pack, the battery pack is mainly used for charging an electric tool for multi-scene operation such as a pruning machine, a chain saw, a blower, a mower, an angle grinder, an electric drill, an electric hammer, a cutter and the like, so that the universality of the electric tool is improved, and the working range of the electric tool is not limited by the position of a socket.

The battery pack is used as an energy storage component, and the battery pack also needs to be charged frequently, and a current common charging mode is to charge by using a direct current charger. An electronic device for converting alternating current into direct current is arranged in the direct current charger, the input end of the direct current charger is inserted into an alternating current power socket, and the output end of the direct current charger is connected with the battery pack, so that the battery pack can be charged. However, sometimes the battery pack cannot be charged without carrying the dc charger, which causes inconvenience to the use of the battery pack.

Accordingly, in a prior application of the present application, there is provided a battery pack; the battery pack has a charging end, and a direct-current charger is not required to be configured, so that the problem of poor convenience of the traditional battery pack is solved.

However, the battery pack is large in size and inconvenient to carry.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a battery pack, which has a charging terminal, and is compact in structure and convenient to carry.

The technical scheme is as follows:

according to a first aspect of an embodiment of the present disclosure, there is provided a battery pack applied to an electric tool; the battery pack includes:

a housing enclosing an accommodating space; the height of the shell is C;

the battery pack is positioned in the accommodating space and comprises a plurality of electric core pieces distributed side by side along the length direction of the shell; the height of the battery pack along the height direction of the shell is c;

a charging terminal mounted to the housing and configured to supply power to the battery pack;

a first electrical connector located in the receiving space; the first electrical connector is electrically connected with the battery pack and configured to charge the power tool;

a second electrical connector located in the receiving space; the second electrical connector is electrically connected with the battery pack and is configured to charge an electronic device;

wherein C is more than C and less than or equal to 1.5C.

Optionally, the housing includes a base, a middle frame and a cover; the base and the cover body are respectively assembled on two opposite sides of the middle frame to form the accommodating space in a surrounding manner;

wherein the middle frame comprises an outer frame body; the outer frame body includes a first opening for assembling the first electrical connector, a second opening for assembling the second electrical connector, and a third opening for assembling the charging terminal.

Optionally, the middle frame further comprises; the mounting rack is positioned in the accommodating space and connected to the outer frame body;

the battery pack further includes a pair of mounting brackets; the positive end and the negative end of the electric core piece are respectively assembled on the pair of mounting brackets;

the mounting bracket is fixedly mounted on the mounting rack.

Optionally, the mounting bracket includes a mounting post and a plurality of sleeve portions corresponding to the electrical core pieces one to one; one end of the electric core piece is disposed inside the sleeve portion;

the mounting column is arranged between two adjacent sleeve parts, and the bottom end of the mounting column does not exceed the sleeve parts; the mounting column is fixedly mounted on the mounting frame through a fastener.

Optionally, the mounting frame further comprises a support main body and a plurality of connecting strips arranged around the support main body; the connecting strip is arranged between the supporting main body and the outer frame body in a connecting mode; first hollow-out areas for accommodating a part of the battery pack are formed between two adjacent connecting strips and between the connecting strips and the first separating member.

Optionally, the outer frame body sequentially includes a first side wall, a second side wall, a third side wall and a fourth side wall which enclose a circle; the first opening and the second opening are both located on the first side wall; the third opening is positioned on the first side wall and/or the second side wall; two ends of the supporting main body are respectively connected with the second side wall and the fourth side wall;

wherein the height of the first side wall is greater than that of the third side wall, and the heights of the second side wall and the fourth side wall are gradually reduced along the direction that the first side wall points to the third side wall.

Optionally, the charging terminal comprises an AC pin;

and/or, the first electrical connector comprises a three-wire power interface;

and/or the second electric connector comprises a USB interface, a Type-C interface or a lighting interface.

Optionally, the width of the housing is B; wherein, C is more than or equal to 0.4B and less than B.

Optionally, the height C of the housing is greater than or equal to 30mm and less than or equal to 40mm, and the width B of the housing is greater than or equal to 70mm and less than or equal to 90mm.

According to a second aspect of the embodiments of the present disclosure, there is provided a battery pack applied to an electric power tool; the battery pack includes:

a housing enclosing an accommodating space; the length of the shell is A;

the battery pack is positioned in the accommodating space and comprises at least two groups of electric core packs stacked along the height direction of the shell, and the electric core packs comprise four electric core pieces which are distributed side by side along the length direction of the shell; the length of the battery pack along the length direction of the shell is a;

wherein a is more than A and less than or equal to 1.4a.

Optionally, the battery pack further includes a first circuit board assembly for converting ac power into dc power; the first circuit board assembly is mounted in the accommodating space;

wherein the first circuit board assembly includes a rectifier; the rectifier is electrically connected to the charging terminal and the battery pack, respectively.

Optionally, the housing comprises a first divider; the first partition is configured to divide the accommodating space into a first accommodating space and a second accommodating space in a length direction of the case; the battery pack is positioned in the first accommodating space, and the second circuit board assembly, the first electric connector and the second electric connector are positioned in the second accommodating space;

the length of the first accommodating space in the length direction of the shell is D, and the length of the second accommodating space in the length direction of the shell is E; wherein E is less than 0.5D.

Optionally, the width of the housing is B; wherein, B is more than A and less than or equal to 1.6B.

Optionally, the length a of the housing is greater than or equal to 120mm and less than or equal to 140mm, and the width B of the housing is greater than or equal to 70mm and less than or equal to 90mm.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the technical scheme, the arrangement direction of the electric core pieces in the battery pack is adjusted, so that the distribution of all electronic elements and circuits in the battery pack is more reasonable, the structure of the battery pack is more compact, and the height of a shell of the battery pack is not more than 150% of the height of the battery pack; thereby reducing the volume of the battery pack and facilitating carrying.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

Brief description of the drawingsthe accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not intended to limit the disclosure.

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic block diagram of a circuit in accordance with a first exemplary embodiment of the present invention;

fig. 2 is a first schematic structural diagram of a battery pack according to a first exemplary embodiment of the present invention;

fig. 3 is a schematic layout diagram of an internal circuit board of a battery pack according to a first exemplary embodiment of the present invention;

fig. 4 is another layout diagram of the internal circuit board of a battery pack according to a first exemplary embodiment of the present invention;

fig. 5 is a schematic structural diagram of a battery pack according to a first exemplary embodiment of the present invention;

fig. 6 is a schematic diagram of a battery pack charging period and a power supply for charging an electronic product according to a first exemplary embodiment of the invention;

fig. 7 is a schematic diagram illustrating a charging state of a battery pack connected to an AC wall plug via a charging terminal according to a first exemplary embodiment of the present invention;

fig. 8 is a schematic diagram illustrating a battery pack connected to an AC wall plug charging state through a bidirectional charging/discharging interface according to a first exemplary embodiment of the present invention;

fig. 9 is a schematic diagram illustrating a charging state of a battery pack connected to a DC power source via a bi-directional charging/discharging interface according to a first exemplary embodiment of the present invention;

fig. 10 is a schematic diagram illustrating a state of charge of a battery pack simultaneously via a bi-directional charging/discharging interface and a charging terminal according to a first exemplary embodiment of the present invention;

fig. 11 is a first schematic structural diagram of a battery pack according to a second exemplary embodiment of the present invention;

fig. 12 is a second schematic structural view of a battery pack according to a second exemplary embodiment of the present invention (base and cover are omitted);

fig. 13 is a third schematic structural view of a battery pack according to a second exemplary embodiment of the present invention (omitting the base, the cover, and the second circuit board);

fig. 14 is a schematic structural view of a battery pack according to a second exemplary embodiment of the present invention;

FIG. 15 is a diagram illustrating a structure of a middle frame according to a second exemplary embodiment of the present invention;

fig. 16 is a schematic layout diagram of an internal circuit board of a battery pack according to a second exemplary embodiment of the present invention;

fig. 17 is a schematic structural diagram of a battery pack according to a third exemplary embodiment of the present invention.

Description of the reference numerals: 10. a housing; 11. a base; 12. a middle frame; 13. a cover body; 120. an outer frame body; 121. a first opening; 122. a second opening; 123. a third opening; 124. a mounting frame; 1240. a first separator; 14. a first accommodating space; 15. a second accommodating space; 1241. a support body; 1242. a connecting strip; 1243. a first hollowed-out area; 1244. a second separator; 125. a first side wall; 126. a second side wall; 127. a third side wall; 128. a fourth side wall; 129. a fourth opening;

20. a battery pack; 21. an electrical core member; 22. mounting a bracket; 220. mounting a column; 221. a sleeve portion;

40. a charging terminal;

50. a first circuit board; 51. a rectifier;

60. a second circuit board; 61. a first electrical connector; 62. a second electrical connector; 63. a third electrical connector; 64. a fourth electrical connector.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more clearly understood, the following detailed description of the present disclosure is made with reference to the accompanying drawings and the detailed description of the present disclosure. It should be understood that the detailed description and specific examples, while indicating the scope of the disclosure, are intended for purposes of illustration only and are not intended to limit the scope of the disclosure.

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

Exemplary embodiment one:

a battery pack 100 for a cordless power tool, comprising:

a housing 10;

a battery or a battery pack 20 accommodated in the case 10;

a control circuit electrically connected to the battery or battery pack 20;

a discharge end 30 electrically connected to the control circuit and adapted to be used by the power tool;

it also includes a charging terminal 40 electrically connected to the control circuit and configured to be mechanically connected to the housing 10 and adapted to be directly connected to an external AC power source for recharging the battery or batteries 20.

The battery pack has at least two batteries connected to each other to supply power therefrom.

The following are specifically mentioned: the electric tool is not limited to the cordless hand-held electric tool, and also comprises power operation equipment using a secondary battery as a power source, such as a garden tool, a cordless dust collector, a direct current air compressor and the like.

In some embodiments, as shown in fig. 1, the control circuit includes a rectified step-down module 200 disposed inside the housing 10 and connected to the charging terminal 40, and configured to convert the external AC current into a DC current suitable for recharging the battery or battery pack 20.

The BMS protection board is only arranged in the battery pack for the traditional adaptive electric tool, and the rectifying and voltage-reducing module 200 is independently arranged in a special charger, namely, a user needs to buy a matched charger when buying the battery pack.

In addition, the control circuit further includes a lithium battery management module 300 disposed inside the housing 10 and connected to the discharge end 30, and configured to monitor at least the voltage of the battery or the battery pack 20.

The lithium battery management module 300 is commonly used in a tool battery pack application, and generally has protection functions such as overcurrent, short circuit, over-discharge, over-charge, output overvoltage, high and low temperature charge and discharge, signal interference, and the like.

More specifically, the lithium battery management module 300 includes a management chip 300a electrically connected to the battery or the battery pack 20, and an MCU master 300b connected to the management chip 300a, wherein the MCU master 300b is connected to the rectifying and dropping module 200.

In order to reduce power consumption, the MCU master 300b has a sleep function, and when the charging terminal 40 is connected to the AC power, it is adapted to generate a high level signal to trigger the MCU master 300b to wake up, and the MCU master 300b starts to operate.

In addition, the rectified step down module 200 also includes a voltage detection circuit adapted to detect the presence of AC power access during AC charging and, if so, to activate a charging circuit to recharge the battery or battery pack.

In addition, the rectification step-down module 200 may further include another voltage detection circuit, and when the another voltage detection circuit detects that the input voltage after rectification step-down is higher than the preset threshold, the charging circuit is turned off to stop charging, so that the charging protection function is provided.

In some embodiments, the charging terminal includes an AC pin, and is configured to be rotatably disposed in the housing, and has a first state (shown in fig. 2) received in the housing and a second state (shown in fig. 5) protruding from the housing. When the charging terminal is in the second state, the charging terminal can be directly inserted into the socket so as to enable the battery pack to be in the charging state; when the charging end is in the first state, the battery pack is conveniently inserted into the slot of the electric tool to charge the electric tool.

With continued reference to fig. 2 and fig. 3, the battery pack 100 for the cordless power tool further includes a first circuit board 50 and a second circuit board 60 disposed in the housing 10 and electrically connected to each other;

a first circuit board 50 connected to the charging terminal 40 and configured to convert an external AC current into a DC current suitable for recharging the battery or battery pack 20; the second circuit board 60 is connected to the positive and negative poles of the battery or battery pack 20, and is configured to monitor at least the voltage of the battery or battery pack 20.

Specifically, the rectifying and voltage-reducing module 200 is disposed on the first circuit board 50, and the lithium battery management module 300 including the management chip 300a and the MCU master 300b is disposed on the second circuit board 60.

The MCU master 300b is connected to the rectifying and dropping module 200, so that an electrical connection is required between the first circuit board 50 and the second circuit board 60, wherein the electrical connection may be a wire connection, and preferably a bridge board 500, as shown in fig. 3, and the bridge board 500 performs an electrical connection between the first circuit board 50 and the second circuit board 60 on the one hand, and also performs a mechanical supporting function between the two on the other hand.

With continued reference to fig. 3, the charging terminal 40 is adjacent to the discharging terminal 30, and the first circuit board 50 and the second circuit board 60 are at least partially stacked and spaced apart, and due to the limited stacking distance, in order to avoid the high voltage region of the first circuit board 50 from interfering with the low voltage discharge of the second circuit board 60, the stacked and spaced apart region is provided with an insulating plate 70.

Specifically, the second circuit board 60 partially covers the battery or battery pack 20 as shown by 60b in fig. 2, and extends to protrude beyond the battery or battery pack 20 and is stacked and spaced apart from the second circuit board 60 as shown by 60a in fig. 2.

With continued reference to fig. 3, the discharge end 30 includes a tool interface 30a connected to the second circuit board 60, the tool interface 30a being disposed between the insulating plate 70 and the second circuit board 60.

Specifically, the tool interface 30a includes at least positive and negative discharge terminals adapted to mate with corresponding terminals of an interface of a power tool, such as a male blade and female socket design or a male pin and female socket design.

Referring to another circuit board layout shown in fig. 4, the charging terminal 40 is far from the discharging terminal 30, and the first circuit board 50 and the second circuit board 60 are not stacked, which can avoid interference between the AC high voltage and the discharging low voltage.

Further, the battery pack 100 for the cordless power tool further includes a USB interface 80 electrically connected to the control circuit, adapted for the use of 3C electronic products, preferably using a type-C interface.

The control circuit further includes a PD module 400 disposed inside the housing 10 and sharing a circuit board with the discharge end 30, wherein the PD module 400 has a PD protocol and a buck-boost integrated chip 400a, as shown in fig. 1.

In summary, the battery pack 100 for the cordless power tool is directly provided with a charging terminal capable of being directly connected to an external AC power source, and when the battery pack 100 runs out of power and needs to be charged, the battery pack is directly connected to the external AC power source through the charging terminal, so that the battery or the battery pack can be recharged without a dedicated charger.

As shown in fig. 6 to 10, the battery pack 100 for the cordless power tool has at least one of the following states of use:

a first state in which the battery pack 100 for the cordless power tool is connected to the power tool and the power for the power tool is supplied through the discharge terminal 30;

in the second state, the battery pack 100 for the cordless electric tool is connected to the 3C electronic product and supplies power to the electronic equipment through the USB interface 80;

a third state in which the battery pack 100 for the cordless power tool is connected to an external AC power source, and the battery or the battery pack 20 is recharged through the charging terminal 40;

in the fourth state, the battery pack 100 for the cordless power tool is connected to an external AC power source, and the battery or battery pack 20 is recharged through the charging terminal 40, and the electronic device is also powered through the USB interface 80.

On one hand, the power consumption of the electric tool can be met, and the power consumption of the electronic equipment can also be met;

on the other hand, a charging terminal capable of being directly connected with an external AC power supply is directly arranged on the battery pack for the cordless electric tool, and when the battery pack is exhausted and needs to be charged, the charging terminal is directly connected with the external AC power supply through the charging terminal so as to recharge the battery or the battery pack without arranging a special charger.

Exemplary embodiment two:

the exemplary embodiment of the present disclosure differs from the first exemplary embodiment in that:

the battery pack 20 in the exemplary embodiment of the present disclosure includes a plurality of electric core members 21 distributed side by side along a length direction of the case 10; therefore, all parts in the battery pack are more conveniently arranged, and the battery pack is compact in structure so as to reduce the volume of the battery pack.

In some embodiments, a battery pack, as shown in fig. 11-13, is used in a power tool; the battery pack includes:

a housing 10 enclosing an accommodation space; the height of the housing 10 is C;

a battery pack 20 located in the accommodation space and including a plurality of electric core members 21 distributed side by side in a longitudinal direction of the case 10; as shown in fig. 14, the height of the battery pack 20 in the height direction of the case 10 is c;

a charging terminal 40 mounted to the housing 10 and configured to supply power to the battery pack 20;

a first electrical connector 61 located in the receiving space; the first electrical connector 61 is electrically connected to the battery pack 20 and configured to charge the power tool;

wherein C is less than or equal to 1.5C.

According to the technical scheme, the arrangement direction of the electric core pieces in the battery pack is adjusted, so that the distribution of all electronic elements and circuits in the battery pack is more reasonable, the structure of the battery pack is more compact, and the height of the battery pack shell is not more than 150% of the height of the battery pack. Thereby reducing the volume of the battery pack and facilitating carrying.

In the above embodiment, the second electrical connector 62 is further included for charging the electronic device, so that the battery pack can also be used as a mobile power source, and the battery pack is multifunctional.

It should be noted that the electric tools include, but are not limited to, garden tools, pruners, chain saws, hair dryers, lawn mowers, angle grinders, electric hammers, cutting machines, dust collectors, hand-held electric saws, hand-held electric drills, dc air compressors, etc., and all of the electric tools use three-wire interfaces to obtain adaptive higher voltages. The electronic device includes, but is not limited to, a smart phone, a smart home, a smart wearable device, etc., and the electronic device adopts a USB interface, a Type-C interface, or a lighting interface to obtain a lower voltage suitable for the electronic device.

In some embodiments, the width of the housing 10 is B. Wherein, C is more than or equal to 0.4B and less than B. By defining the height to width ratio of the housing 10 of the battery pack, the battery pack can better fit the size of the slot or battery compartment on the power tool.

In some embodiments, the height C of the housing 10 is equal to or greater than 30mm and equal to or less than 40mm, and the width B of the housing 10 is equal to or greater than 70mm and equal to or less than 90mm. In an alternative embodiment, the height C of the housing 10 is 35.5mm and the width of the housing 10 is 80.5mm. Through setting up like this, the volume of battery package is less, conveniently carries.

In some embodiments, as shown in fig. 13 and 16, the battery pack further includes:

a second electrical connector 62 electrically connected to the battery pack 20 and configured to charge the electronic device.

A third electrical connector 63 electrically connected to the battery pack 20 and configured to charge the battery pack 20.

A fourth electrical connector 64 electrically connected to the battery pack 20 and configured to charge the electronic device.

In the above embodiments, the second electrical connector 62 and the fourth electrical connector 64 are both configured to charge an electronic device. But the output voltage between the two is different, so that the charging method is corresponding to the conventional fast charging method and slow charging method. The second electrical connector 62 includes a USB interface. The fourth electrical connector 64 includes a data line, and the data line includes a microsusb interface, a Type-C interface, or a lighting interface.

In the above embodiment, the third electrical connector 63 includes a MicroUSB interface, a Type-C interface, or a Lighting interface. Therefore, the battery pack can be charged directly through the charging terminal 40, i.e. the AC plug, or can be charged through the external charger plugged into the interface of the third connector. And the two modes can be simultaneously carried out so as to improve the charging efficiency of the battery pack.

In the above embodiment, the second electrical connector 62 and the third electrical connector 63 are mounted on the second circuit board 60, and the fourth electrical connector 64 is mounted on the housing 10. The second electrical connector 62, the third electrical connector 63, and the fourth electrical connector 64 are all electrically connected to the battery pack 20 through the second circuit board 60.

In some embodiments, the battery pack further includes a rectifier 51 positioned in the receiving space. The rectifier 51 is electrically connected to the charging terminal 40 and the battery pack 20, respectively, and converts the alternating current into direct current that can be adapted to the use of the battery pack 20. The rectifier 51 is mounted on the first circuit board 50 and electrically connected to the battery pack 20 through the first circuit board 50.

In some embodiments, as shown in fig. 11, the housing 10 includes a base 11, a middle frame 12, and a cover 13. The base 11 and the cover 13 are detachably connected to two opposite sides of the middle frame 12 to form an accommodating space. Thereby facilitating the assembly of the battery pack.

In the above embodiment, as shown in fig. 15, the middle frame 12 includes the outer frame body 120 and the mounting bracket 124 for mounting the battery pack 20. The mount 124 includes a first divider 1240. The first partition 1240 is configured to divide the accommodating space into the first accommodating space 14 and the second accommodating space 15 in the length direction of the case 10. The battery pack 20, a part of the second circuit board 60 and the management chip 300a, the MCU master control 300b and the lithium battery management module 300 on the second circuit board 60 are located in the first accommodating space 14, and the other part of the second circuit board 60 and the first electrical connector 61 and the second electrical connector 62 on the second circuit board 60, and the first circuit board 50 and the rectifier 51 on the first circuit board 50 are located in the second accommodating space 15. And the first circuit board 50 and the second circuit board 60 are disposed at intervals in the thickness direction of the housing 10. And then the components and parts in the whole accommodation space are arranged neatly, which is beneficial to the structure compactness of the battery pack, thereby reducing the volume of the battery pack.

Meanwhile, the first circuit board 50 and the second circuit board 60, which have different operating voltages, are spaced apart from each other, so that a creepage distance is formed between the first circuit board 50 and the second circuit board 60. The electromagnetic interference of the rectifier 51 on the first circuit board 50 to the respective electronic components on the second circuit board 60 is reduced.

In the above embodiment, the mounting frame 124 further includes the second spacer 1244, and both sides of the second spacer 1244 are connected to the first spacer 1240 and the outer frame 120, respectively, to separate the electronic components on the first circuit board 50 and the first circuit board 50 from the electronic components on the second circuit board 60 and the second circuit board 60. Further reducing the electromagnetic interference of the rectifier 51 on the first circuit board 50 to the electronic components on the second circuit board 60.

In some embodiments, the outer frame 120 includes a first opening 121 for assembling the first electrical connector 61, a second opening 122 for assembling the second electrical connector 62, a third opening 123 for assembling the charging terminal 40, and a fourth opening 129 for assembling the third electrical connector 63. As an alternative embodiment, the outer frame body 120 includes a first sidewall 125, a second sidewall 126, a third sidewall 127, and a fourth sidewall 128 enclosing a circle in sequence. The first opening 121, the second opening 122, and the fourth opening 129 are all located on the first sidewall 125. The third opening 123 is located in the second sidewall 126. The support body is connected at both ends to a second side wall 126 and a fourth side wall 128, respectively. Wherein the height of the first sidewall 125 is greater than the height of the third sidewall 127, and the heights of the second sidewall 126 and the fourth sidewall 128 gradually decrease in a direction in which the first sidewall 125 points to the third sidewall 127.

It should be noted that, along the direction from the first side wall 125 to the third side wall 127, the gradually decreasing height of the middle frame 12 is compensated by the base 11 and the cover 13 together, so that the housing 10 still has a regular hexahedron shape. With this arrangement, first, the structural strength of the case 10 and the base 11, which are in contact with the outside, can be increased, thereby enhancing the structural strength of the battery pack at the same height of the case 10. Secondly, the base 11 and the cover 13 can be easily detachably attached to the middle frame 12. Finally, the first accommodating space 14 is close to the higher first sidewall 125, there can be enough space to arrange the rectifier 51, the first electrical connector 61, the second electrical connector 62, the third electrical connector 63, and the like, and the ends of the first sidewall 125 and the second sidewall 126 close to the first sidewall 125 can also have enough area to arrange the first opening 121, the second opening 122, the third opening 123, the fourth opening 129, and the groove for accommodating the fourth electrical connector 64. Thereby maximizing the use of the case 10 and the receiving space inside the case 10 and thus reducing the volume of the battery pack.

In some embodiments, the battery pack 20 also includes a pair of mounting brackets 22. The positive and negative ends of the electric core member 21 are respectively assembled to a pair of mounting brackets 22. The bottom end of the mounting bracket 22 is fixedly mounted to the mounting bracket 124. The second circuit board 60 is mounted to the top end of the mounting bracket 22.

As an alternative embodiment, the electrical core component 21 is selected from the 21700 or 18650 model specification. A plurality of the electric core members 21 are connected in series and/or in parallel so that the output voltage of the battery pack can satisfy the requirements of the electric power tool and the electronic equipment.

In the above embodiment, the mounting bracket 22 includes the mounting posts 220 and the several sleeve portions 221 in one-to-one correspondence with the electrical core pieces 21. One end of the electric core member 21 is disposed inside the sleeve portion 221. The mounting post 220 is disposed between two adjacent sleeve portions 221, and a bottom end of the mounting post 220 does not exceed the sleeve portions 221. The mounting post 220 is fixedly mounted to the mounting bracket 124 by fasteners. Alternatively, the mounting posts 220 may be provided with longitudinally extending threaded holes for bolting the mounting bracket 22 to the mounting bracket 124. With such an arrangement, the gap between the two electrical core members 21 is fully utilized, so that the mounting post 220 does not occupy additional height space, thereby achieving the purpose of reducing the overall height of the housing 10.

In the above embodiment, the mounting frame 124 further includes a support body 1241 and a plurality of connection bars 1242 disposed around the support body 1241. The connection bar 1242 is connected between the support main body 1241 and the outer frame 120. First hollow areas 1243 for accommodating part of the battery pack 20 are formed between two adjacent connection bars 1242 and between the connection bars 1242 and the first separator 1240. As an alternative embodiment, the connecting bar 1242 near the second side wall 126 and the fourth side wall 128 is located between two adjacent sleeve portions 221, so that the bottom ends of the sleeve portions 221 can be disposed in the first hollow-out area 1243, thereby reducing the overall height of the casing 10.

In some embodiments, the base 11 includes a first snap feature. The cover 13 includes a second snap structure. First buckle structure and second buckle structure all are located accommodation space, and one in first buckle structure and the second buckle structure and center 12 grafting cooperation. The first buckle structure and the second buckle structure are fixed in a buckle mode. In the process of assembling the casing 10, one of the base 11 and the cover 13 is inserted into the middle frame 12, and then the other of the base 11 and the cover 13 is fixed by the first fastening structure and the second fastening structure, so that the outer surface of the casing 10 is simple and smooth. Meanwhile, the first buckle structure and the second buckle structure do not increase the extra height of the battery pack. Thereby enabling to further reduce the overall height of the housing 10.

It should be noted that the first or second fastening structure passes through the first hollow-out area 1243 when being inserted into the middle frame 12. And, the first and second snap structures may be any one of the existing snap fixing structures, and will not be described in detail herein.

Exemplary embodiment three:

the exemplary embodiment of the present disclosure is different from the second exemplary embodiment in that:

the battery pack 20 (in the first embodiment) in the exemplary embodiment of the present disclosure includes at least two sets of electric core packs stacked in the height direction of the case 10, and the electric core packs include four electric core members 21 arranged side by side in the length direction of the case 10. Therefore, all parts in the battery pack are more conveniently arranged, and the battery pack is compact in structure so as to reduce the volume of the battery pack.

A battery pack as shown in fig. 17, comprising:

the shell 10 encloses an accommodating space, and the length of the shell 10 is A;

the battery pack 20 is positioned in the accommodating space and comprises at least two groups of electric core groups which are stacked along the height direction of the shell 10, the electric core groups comprise four electric core pieces 21 which are distributed side by side along the length direction of the shell 10, and the length of the battery pack 20 along the length direction of the shell 10 is a;

and a first electrical connector 61 located in the receiving space. The first electrical connector 61 is electrically connected to the battery pack 20 and configured to charge the power tool;

and a second electrical connector 62 located in the receiving space. The second electrical connector 62 is electrically connected to the battery pack 20 and is configured to charge the electronic device;

wherein a is more than A and less than or equal to 1.4a.

For a power tool that operates at a high operating voltage, the battery pack 20 in the battery pack needs to be provided with a large number of electric core members 21. If all the electric core members 21 are arranged in a single row, the length of the battery pack becomes too long. The stability of the battery pack structure is not facilitated, and certain potential safety hazards can be avoided. In the conventional battery pack 20, four electric core members 21 are often arranged in a single row and then sequentially stacked. On the basis of the battery pack, the length of the shell 10 is reduced as much as possible, so that the battery pack is compact in structure.

In some embodiments, the width of the housing 10 is B. Wherein B is less than A and less than or equal to 1.6B. As an alternative embodiment, the length a of the housing 10 is equal to or greater than 120mm and equal to or less than 140mm, and the width B of the housing 10 is equal to or greater than 70mm and equal to or less than 90mm. As an alternative embodiment, the length A of the housing 10 is 127.5mm and the width of the housing 10 is 80.5mm. Through setting up like this, the volume of battery package is less, conveniently carries.

It should be noted that the "first connecting body" may be a "part of the connecting piece", that is, the "first connecting body" and "other parts of the connecting piece, such as the second connecting body" are integrally formed; or can be separated from other parts of the connecting piece, such as the second connecting body, to form a separate component, namely, the first connecting body can be manufactured separately and then combined with other parts of the connecting piece, such as the second connecting body, to form a whole.

Equivalently, the "body" and the "certain part" can be parts of the corresponding "component", i.e., the "body" and the "certain part" are integrally manufactured with other parts of the "component"; the "part" can be made separately from the "other part" and then combined with the "other part" into a whole. The expression "a certain body" or "a certain portion" in the present disclosure is only one example, and is not intended to limit the scope of the present disclosure, so long as the above features are included and the same function is understood to be equivalent to the present disclosure.

It should be noted that the "battery compartment" may be one of the parts of the module, i.e., the "protective case" and the other components of the "protective case" are assembled into a module, and then the modular assembly is performed; or can be relatively independent from other components of the protective shell and can be respectively installed, namely the device and other components of the protective shell form a whole.

Equivalently, the components included in the "unit", "assembly", "mechanism" and "device" of the present disclosure can also be flexibly combined, i.e., can be produced in a modularized manner according to the actual situation, and can be assembled in a modularized manner as an independent module; the modules may be assembled separately, and one module may be constructed in the present apparatus. The division of the above-mentioned components in the present disclosure is only one embodiment, which is convenient for reading and not limiting the scope of protection of the present disclosure, and the technical solutions equivalent to the present disclosure should be understood as if they are included and the functions are the same.

In the description of the present disclosure, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present disclosure and to simplify the description, but are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present disclosure.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include at least one of the feature. In the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.

In the present disclosure, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral with; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In the present disclosure, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "fixed," "disposed," "secured" or "disposed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is regarded as being fixedly connected with the other element in a transmission manner, the two elements can be detachably connected and also can be fixed in an undetachable manner, power transmission can be achieved, such as sleeving, clamping, integrally-formed fixing, welding and the like, and the traditional technology can achieve the purpose of no encumbrance. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

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

The above examples only show several embodiments of the present disclosure, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the inventive concept of the present disclosure, which is intended to be within the scope of the present disclosure.

Claims

1. A battery pack is applied to an electric tool; characterized in that, the battery package includes:

a housing (10) enclosing an accommodation space; the height of the housing (10) is C;

the battery pack (20) is positioned in the accommodating space and comprises a plurality of battery cell components (21) which are distributed side by side along the length direction of the shell (10); the height of the battery pack (20) in the height direction of the housing (10) is c;

a charging terminal (40) mounted to the housing (10) and configured to supply power to the battery pack (20);

a first electrical connector (61) located in the receiving space; the first electrical connector (61) is electrically connected with the battery pack (20) and configured to charge the power tool;

a second electrical connector (62) located in the receiving space; the second electrical connector (62) is electrically connected with the battery pack (20) and configured to charge an electronic device;

wherein C is less than or equal to 1.5C.

2. The battery pack according to claim 1, wherein the case (10) includes a base (11), a middle frame (12), and a cover (13); the base (11) and the cover body (13) are respectively assembled on two opposite sides of the middle frame (12) to form the accommodating space in a surrounding manner;

wherein the middle frame (12) comprises an outer frame body (120); the outer frame (120) includes a first opening (121) for assembling the first electrical connector (61), a second opening (122) for assembling the second electrical connector (62), and a third opening (123) for assembling the charging terminal (40).

3. The battery pack according to claim 2, wherein the center frame (12) further comprises a mounting bracket (124) for mounting the battery pack (20); the mounting rack (124) is positioned in the accommodating space and connected to the outer frame body (120);

the battery pack (20) further includes a pair of mounting brackets (22); the positive and negative ends of the electric core member (21) are respectively assembled on the pair of mounting brackets (22);

the mounting bracket (22) is fixedly mounted to the mounting bracket (124).

4. The battery pack according to claim 3, wherein the mounting bracket (22) includes a mounting post (220) and a plurality of sleeve portions (221) in one-to-one correspondence with the electric core members (21); one end of the electric core member (21) is disposed inside the sleeve portion (221);

wherein the mounting column (220) is arranged between two adjacent sleeve portions (221), and the bottom end of the mounting column (220) does not exceed the sleeve portions (221); the mounting post (220) is fixedly mounted to the mounting bracket (124) by a fastener.

5. A battery pack according to claim 3, wherein the mounting frame (124) further comprises a support body (1241) and a number of connecting bars (1242) arranged around the support body (1241); the connecting strip (1242) is connected and arranged between the supporting main body (1241) and the outer frame body (120); a first hollow-out area (1243) for accommodating a part of the battery pack (20) is formed between two adjacent connecting strips (1242).

6. The battery pack according to claim 5, wherein the outer frame (120) comprises a first sidewall (125), a second sidewall (126), a third sidewall (127), and a fourth sidewall (128) enclosing a circle in this order; the first opening (121) and the second opening (122) are both located on the first side wall (125); the third opening (123) is located at the first sidewall (125) and/or the second sidewall (126); the two ends of the support body (1241) are respectively connected with the second side wall (126) and the fourth side wall (128);

wherein the height of the first side wall (125) is greater than the height of the third side wall (127), and the heights of the second side wall (126) and the fourth side wall (128) are gradually reduced along the direction in which the first side wall (125) points to the third side wall (127).

7. The battery pack according to claim 1, wherein the charging terminal (40) includes an AC pin;

and/or, the first electrical connector (61) comprises a three-wire power interface;

and/or the second electrical connector (62) comprises a USB interface, a Type-C interface or a lighting interface.

8. The battery pack according to any one of claims 1 to 7, wherein the housing (10) has a width B; wherein, C is more than or equal to 0.4B and less than B.

9. The battery pack according to claim 8, wherein the height C of the case (10) is equal to or greater than 30mm and equal to or less than 40mm, and the width B of the case (10) is equal to or greater than 70mm and equal to or less than 90mm.

10. A battery pack is applied to an electric tool; characterized in that, the battery package includes:

a housing (10) enclosing an accommodation space; the length of the shell (10) is A;

the battery pack (20) is positioned in the accommodating space and comprises at least two groups of electric core groups which are stacked along the height direction of the shell (10), and the electric core groups comprise four electric core components (21) which are distributed side by side along the length direction of the shell (10); the length of the battery pack (20) along the length direction of the shell (10) is a;

wherein a is more than A and less than or equal to 1.4a.

11. The battery pack according to claim 10, further comprising a rectifier (51) located in the receiving space; the rectifier (51) is electrically connected to the charging terminal (40) and the battery pack (20), respectively.

12. The battery pack according to claim 11, wherein the case (10) includes a first separator (1240); the first divider (1240) is configured to divide the accommodating space into a first accommodating space (14) and a second accommodating space (15) in a length direction of the case (10); the battery pack (20) is positioned in the first accommodating space (14), and the rectifier (51), the first electrical connector (61) and the second electrical connector (62) are all positioned in the second accommodating space (15);

the length of the first accommodating space (14) along the length direction of the shell (10) is D, and the length of the second accommodating space (15) along the length direction of the shell (10) is E; wherein E <0.5D.

13. A battery pack according to any one of claims 10-12, wherein the housing (10) has a width B; wherein B is more than A and less than or equal to 1.6B.

14. The battery pack according to claim 13, wherein the length a of the case (10) is 120mm or more and 140mm or less, and the width B of the case (10) is 70mm or more and 90mm or less.