CN215497001U

CN215497001U - Battery pack and electric equipment

Info

Publication number: CN215497001U
Application number: CN202121857257.0U
Authority: CN
Inventors: 唐俊伟; 吴明杰; 夏君
Original assignee: Dongguan Poweramp Technology Ltd
Current assignee: Dongguan Poweramp Technology Ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-01-11
Anticipated expiration: 2031-08-10

Abstract

A battery pack includes a plurality of cells stacked in a first direction, a circuit board, and a connector. The battery cell includes a first terminal and a second terminal. The first terminal and the second terminal have opposite polarities. The first terminal of a cell is connected to the second terminal of an adjacent cell. The connector is connected to the first and second terminals and the circuit board which are connected to each other. The battery pack and the electric equipment are directly connected to the first terminal, the second terminal and the circuit board which are connected with one another through the connecting pieces, the using number of the copper sheets is reduced, welding areas on the circuit board are reduced, and then the area of cloth pieces on the circuit board is increased.

Description

Battery pack and electric equipment

Technical Field

The application relates to the technical field of energy storage, especially, relate to a group battery and consumer.

Background

The battery cell in the battery pack is usually connected with the circuit board through a plurality of copper sheets, the plurality of copper sheets are respectively welded with the battery cell and the circuit board, and then the copper sheets are welded, so that the welding times are large, the occupied welding area on the circuit board is large, and the cloth space on the circuit board is insufficient.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a battery pack and an electric device, which can reduce the area of the circuit board.

Embodiments of the present application provide a battery pack. The battery pack comprises a plurality of battery cells, a circuit board and a connecting piece, wherein the battery cells are stacked along a first direction. The battery cell includes a first terminal and a second terminal. The first terminal and the second terminal have opposite polarities. The first terminal of a cell is connected to the second terminal of an adjacent cell. The connector is connected to the first and second terminals and the circuit board which are connected to each other.

The embodiment of the application comprises the following technical effects: the battery pack is directly connected to the first terminal, the second terminal and the circuit board which are connected with each other through the connecting piece, the using number of copper sheets is reduced, the welding area of the copper sheets on the circuit board is reduced, and the cloth area of the circuit board is increased.

Further, in some embodiments of the present application, the circuit board is disposed to extend along a first direction, the circuit board includes a first side, the first side is provided with a first opening, and the connecting member is at least partially disposed in the first opening.

The embodiment of the application comprises the following technical effects: the connecting piece is arranged in the first opening, so that the position of the connecting piece is convenient to position.

Further, in some embodiments of the present application, a width of the first opening is greater than a width of the connector in the first direction.

Further, in some embodiments of the present application, the connector includes a first section and a second section. The first section is connected to the circuit board. The second section is connected to the first and second terminals that are connected to each other.

Further, in some embodiments of the present application, a distance between the first section and the second section is greater than or equal to a thickness of the circuit board, and the first section and the second section are disposed on opposite sides of the circuit board along a second direction perpendicular to the first direction.

Further, in some embodiments of the present application, the cell includes a cell casing and an electrode assembly disposed within the cell casing. The first and second terminals are connected to the electrode assembly and extend outwardly from the cell housing. The cell casing includes a first portion for receiving the electrode assembly and a second portion extending outwardly from the first portion, the cell casing including an aluminum plastic film.

Further, in some embodiments of the present application, the first section is soldered to the circuit board.

Further, in some embodiments of the present application, the connector further comprises a third section. The third section is connected with the first section and the second section, the first section, the second section and the third section are of an integrally formed structure, and at least part of the third section is arranged in the first opening.

The embodiment of the application comprises the following technical effects: the number of copper sheets is reduced, the material cost is reduced, the welding times are reduced, and the process manufacturing cost is reduced.

Further, in some embodiments of the present application, the first terminal and the second terminal connected to each other are respectively connected to be bent toward each other. The second section is connected in contact with the first terminal and/or the second terminal.

Further, in some embodiments of the present application, the second section is connected to a side of the interconnected first and second terminals facing away from the circuit board.

The embodiment of the application comprises the following technical effects: so as to reduce the height of the battery pack along the second direction Y, and further reduce the volume of the battery pack.

An embodiment of the present application further provides an electric device, including the battery pack in any of the above embodiments.

Drawings

Fig. 1 shows a schematic diagram of the structure of a battery pack in some embodiments.

Fig. 2 shows an exploded view of a battery pack in some embodiments.

Fig. 3 shows a schematic diagram of the structure of stacked cells in some embodiments.

Fig. 4 shows a schematic structural diagram of a cell in some embodiments.

Fig. 5 shows a schematic diagram of a circuit board in some embodiments.

Fig. 6 shows a schematic view of the structure of the connector in some embodiments.

Fig. 7 shows a state diagram of another view of stacked cells in some embodiments.

Fig. 8 shows a schematic structural diagram of an electric device in an embodiment.

Description of the main element symbols:

battery pack 100

Battery cell 10

Cell shell 11

Second part 111

First portion 112

Recess 11a

First terminal 12

The overall positive terminal 12a

Second terminal 13

Total negative terminal 13a

Circuit board 20

First side 21

Second side 22

First opening 20a

Third side 23

Fourth side 24

Second opening 20b

Connecting piece 30

First section 31

Second section 32

Third section 33

Power utilization device 200

First direction X

Second direction Y

Third direction Z

The following specific examples will further illustrate the application in conjunction with the above figures.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

It will be understood that when two elements are disposed in the same direction when they are disposed in parallel/perpendicular, there can be an angle between the elements, a tolerance of 0- ± 5% between the elements, and a tolerance of 0- ± 10% greater, equal or less than the tolerance allowed.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following embodiments, features of the embodiments may be combined with each other without conflict.

Referring to fig. 1 and fig. 2, an embodiment of the present application provides a battery pack 100, where the battery pack 100 includes a plurality of battery cells 10 stacked in a first direction X, a circuit board 20, and a connecting member 30. The connecting members 30 connect the battery cell 10 and the circuit board 20, respectively. In an embodiment, the battery pack 100 further includes a housing (not shown), and the battery cell 10, the circuit board 20 and the connector 30 are disposed in the housing.

Referring to fig. 3 and 4, in an embodiment, the battery cell 10 includes a cell casing 11, an electrode assembly (not shown), a first terminal 12, and a second terminal 13, where the electrode assembly is accommodated in the cell casing 11, and the first terminal 12 and the second terminal 13 are connected to the electrode assembly and extend outward out of the cell casing 11. The electrode assembly includes a winding type structure formed by winding a positive electrode tab, a negative electrode tab, and a separator. Further, the cell casing 11 includes a second portion 111 and a first portion 112 connected to each other, the second portion 111 is located at an edge of the first portion 112 and extends outward from the first portion 112 along a second direction Y perpendicular to the first direction X, the electrode assembly is accommodated in the first portion 112, and the first terminal 12 and the second terminal 13 protrude from the second portion 111.

The first terminal 12 and the second terminal 13 have opposite polarities, and one of the first terminal 12 and the second terminal 13 is a positive terminal and the other is a negative terminal. In some embodiments, the cell casing 11 includes an aluminum plastic film. In this embodiment, the first terminal 12 is described as a positive terminal, and the second terminal 13 is described as a negative terminal.

The first terminal 12 of the battery cell 10 is connected to the second terminal 13 of the battery cell 10 adjacent to the first terminal 12, further, the first terminal 12 and the second terminal 13 are folded and stacked in opposite directions, and the connecting member 30 connects one of the first terminal 12 and the second terminal 13, which are connected to each other, and the circuit board 20.

In the first direction X, the first terminal 12 of one of the outermost battery cells 10 is an overall positive terminal 12a, the second terminal 13 of the other outermost battery cell 10 is an overall negative terminal 13a, and the overall positive terminal 12a and the overall negative terminal 13a are connected to the circuit board 20.

In an embodiment, along the second direction Y, the projection of the second portion 111 is located at the middle position of the projection of the first portion 112, so as to form two recesses 11a in cooperation with the first portion 112, and the connection member 30 is disposed in the recesses 11a of two adjacent battery cells 10 and connected to the first terminal 12 and the second terminal 13 which are connected in a stacked manner after being bent.

Referring to fig. 1 and fig. 5, in an embodiment, the circuit board 20 extends along a first direction X to be connected to the battery cells 10 stacked along the first direction X. The circuit board comprises a first side 21 and a second side 22 which are arranged along a third direction Z perpendicular to the first direction X and the second direction Y, the first side 21 and/or the second side 22 are/is provided with a first opening 20a, and the connecting piece 30 is arranged at the first opening 20a and can be used for positioning the position of the connecting piece 30.

In one embodiment, the width of the first opening 20a is greater than the width of the connector 30 along the first direction X, so as to facilitate the connector 30 to be disposed in the first opening 20a and the connector 30 to be soldered on the circuit board 20.

In one embodiment, along the first direction X, the circuit board 20 includes a third side 23 and a fourth side 24, the third side 23 and the fourth side 24 are provided with a second opening 20b, and the overall positive terminal 12a and the overall negative terminal 13a are provided in the second opening and connected to the circuit board 20.

Referring to fig. 3 and 6, in one embodiment, the connecting member 30 includes a first section 31, a second section 32, and a third section 33. The third section 33 is respectively connected with the first section 31 and the second section 32, the first section 31, the second section 32 and the third section 33 are of an integrally formed structure, the number of copper sheets is reduced, the material cost is reduced, the welding times are reduced, and the process manufacturing cost is reduced. The first section 31 and the second section 32 are disposed substantially in parallel, a distance between the first section 31 and the second section 32 is greater than or equal to a thickness of the circuit board 20, the third section 33 is disposed in the first opening 20a, and the first section 31 and the second section 32 are disposed on opposite sides of the circuit board 20 along the second direction Y, wherein the first section 31 is connected to the circuit board 20, and the second section 32 is connected to one of the first terminal 12 and the second terminal 13.

In one embodiment, the second section 32 is connected to a side of the first terminal 12 and the second terminal 13 away from the circuit board 20, so as to reduce the height of the battery pack 100 along the second direction Y, and thus reduce the volume of the battery pack 100.

Referring to fig. 7, in an embodiment, the second segment 32 is disposed in the recess 11a of two adjacent battery cells 10 and connected to the first terminal 12 and the second terminal 13 which are connected in a stacked manner after being bent.

Referring to fig. 8, the present application further provides an electric device 200 using the battery pack 100, which can be used by connecting the circuit board 20 through a circuit. In one embodiment, the electric device 200 of the present application may be, but is not limited to, a portable facsimile machine, a portable copier, a portable printer, a video recorder, a liquid crystal television, a handheld cleaner, a transceiver, a backup power source, a motor, an electric car, an electric motorcycle, an electric power assisted bicycle, an electric power tool, a large household battery, and the like.

The battery pack 100 and the electric equipment 200 are directly connected to the first terminal 12 and the second terminal 13 which are connected with each other and the circuit board 20 through the connecting piece 30, so that the using number of copper sheets is reduced, the material cost is reduced, the steps of welding the copper sheets are reduced, the process manufacturing cost is reduced, the welding area on the circuit board 20 is also reduced, and the cloth area on the circuit board is further increased.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present application and are not to be taken as limiting the present application, and that suitable changes and modifications to the above embodiments are within the scope of the present disclosure as long as they are within the spirit and scope of the present application.

Claims

1. A battery pack, comprising:

a plurality of cells stacked in a first direction, the cells including first and second terminals of opposite polarity, the first terminals of the cells being connected to the second terminals of adjacent cells; and

a circuit board;

characterized in that the battery pack further comprises:

and a connector connected to the first and second terminals and the circuit board connected to each other.

2. The battery pack of claim 1, wherein the circuit board extends in the first direction, the circuit board includes a first side, the first side defines a first opening, and the connector is at least partially disposed in the first opening.

3. The battery of claim 2, wherein a width of the first opening is greater than a width of the connector in the first direction.

4. The battery pack of claim 2, wherein the connector comprises:

a first section connected to the circuit board;

a second section connected to the first terminal and the second terminal connected to each other.

5. The battery pack of claim 4, wherein the distance between the first and second sections is greater than or equal to the thickness of the circuit board, the first and second sections being disposed on opposite sides of the circuit board in a second direction perpendicular to the first direction.

6. The battery pack of claim 5, wherein the cell comprises a cell casing and an electrode assembly disposed within the cell casing, and the first and second terminals are coupled to the electrode assembly and extend outwardly from the cell casing;

the cell casing comprises a first portion and a second portion, the first portion is used for accommodating the electrode assembly, the second portion extends outwards from the first portion, and the cell casing comprises an aluminum plastic film.

7. The battery pack of claim 5, wherein the first section is soldered to the circuit board.

8. The battery pack of claim 4, wherein the connector further comprises:

the third section is connected with the first section and the second section, the first section, the second section and the third section are of an integrally formed structure, and the third section is at least partially arranged in the first opening.

9. The battery pack according to claim 4, wherein the first terminal and the second terminal connected to each other are connected to each other while being bent toward each other, and the second segment is connected to the first terminal and/or the second terminal in a contact manner.

10. An electric device characterized by comprising the battery pack according to any one of claims 1 to 9.