CN220291015U

CN220291015U - Connection piece, battery module and vehicle

Info

Publication number: CN220291015U
Application number: CN202321758797.2U
Authority: CN
Inventors: 徐爱华
Original assignee: Xingheng Power Supply Chuzhou Co ltd
Current assignee: Xingheng Power Supply Chuzhou Co ltd
Priority date: 2023-07-05
Filing date: 2023-07-05
Publication date: 2024-01-02
Anticipated expiration: 2033-07-05

Abstract

The utility model discloses a connecting sheet, a battery module and a vehicle, wherein the connecting sheet comprises: the connecting piece body is bent in the direction perpendicular to the connecting piece body, and then forms a bending part and a welding part; wherein, a connecting structure is formed on the bending part, and a bent buffer structure is formed at the part between the connecting structure and the welding part; the utility model can solve the problem that the welding position of the connecting sheet and the battery core is subjected to unwelding or tearing due to the increase of the distance between adjacent battery cores caused by the expansion of the battery cores.

Description

Connection piece, battery module and vehicle

Technical Field

The utility model relates to the technical field of batteries, in particular to a connecting sheet, a battery module and a vehicle.

Background

The battery cell group is used as an energy supply device of the electric automobile, is one of important components of the electric automobile, is increasingly popular along with development of electric automobile technology, is a most concerned problem, and is required to be connected with each battery cell of the integrated circuit board by using a connecting sheet when collecting information such as voltage, temperature and the like of each battery cell. However, since the cells expand during long-term use of the battery, the spacing between the cells increases, which results in a weld joint between the tab and the cells becoming detached or torn.

In view of this, the present application proposes a connecting piece with a buffer structure to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to solve the technical problem that the welding position of the connecting sheet and the battery cell is subjected to unwelding or tearing due to the fact that the interval between adjacent battery cells is increased due to expansion of the battery cells.

In a first aspect, the present utility model provides a connecting tab comprising:

the connecting piece body is bent in the direction perpendicular to the connecting piece body, and then forms a bending part and a welding part;

the connecting structure is formed on the bending portion, and a bent buffer structure is formed at a portion between the connecting structure and the welding portion.

When the battery cell expands, the interval between adjacent battery cells increases to can cause the interval increase between two welding parts of welding connection piece body on the adjacent battery cell, at this moment, because the connection structure of bending part is restricted on the PCB board, receive the pulling force between connection structure and the welding part, thereby make buffer structure to expand, in order to avoid the welding part to appear tearing or the problem of unwelding on the battery cell, effectively improve the result of use of this application, possess the practicality.

In a preferred embodiment of the connecting piece, a connecting unit is formed at an end of the connecting structure in an extending manner.

In the preferred technical scheme of the connecting sheet, a notch is formed in the connecting unit. Through set up the breach on connecting unit, but increase connecting unit and PCB board's area of contact reduces the connection piece body and breaks away from the risk of PCB board, improves the result of use of this application.

In the preferred technical scheme of the connecting sheet, the bending part of the buffer structure is in arc transition. Through setting up circular arc structure, can guarantee the overflow ability of connection piece body, improve the result of use of this application.

In a preferred embodiment of the above connection piece, the portion between the welded portion and the cushioning structure is inclined at an angle of 10-15 ° with respect to the welded portion.

In the preferable technical scheme of the connecting sheet, the thickness of the connecting sheet body is 0.3-0.5mm.

In the preferred technical scheme of the connecting sheet, the connecting sheet body is integrally formed.

In the preferred technical scheme of the connecting sheet, the connecting sheet body is a nickel sheet.

In a second aspect, the utility model further provides a battery module, which comprises the connecting sheet, a battery core and a PCB, wherein the connecting sheet is used for connecting the battery core and the PCB.

In a third aspect, the present utility model also provides a vehicle, which includes the above battery module.

The beneficial effects of the utility model are as follows: this application is through setting up buffer structure on the connection piece to when making the adjacent electric core interval increase of electric core appearance inflation, interval increase between two welded parts, the tensile that receives between connection structure and the welded part, buffer structure can expand, can effectively avoid the welded part to appear tearing or the problem of unwelding on the electric core, effectively improves the result of use of this application, possesses the practicality.

Drawings

FIG. 1 is a first schematic structural view of a connecting piece;

FIG. 2 is a second schematic structural view of the connecting piece;

fig. 3 is a schematic structural view of a battery module;

fig. 4 is a top view of the battery module;

in the figure:

the connecting piece comprises a connecting piece body 1, a bending part 11, a welding part 12, a connecting structure 13, a connecting unit 131, a notch 132 and a buffer structure 14;

a battery cell 2;

and a PCB 3.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

As shown in fig. 1 to 2, the connecting piece of the present utility model comprises a connecting piece body 1, wherein after the connecting piece body 1 is bent in a direction perpendicular to the connecting piece body 1, the connecting piece body 1 forms a bending part 11 and a welding part 12; wherein, a connecting structure 13 is formed on the bending part 11, and a bent buffer structure 14 is formed at a part between the connecting structure 13 and the welding part 12.

Referring to fig. 1 and 2, two sides of the connecting sheet body 1, which are close to the end parts, are kept horizontal, the middle part of the connecting sheet body 1 is bent towards the direction perpendicular to the connecting sheet body 1, so that a bending part 11 and two welding parts 12 are formed on the connecting sheet body 1, the welding parts 12 are used for being connected with the battery core 2, the connection mode is welding, a connecting structure 13 is formed at the middle part of the bending part 11, the connecting structure 13 is in contact with the PCB 3, thereby realizing the acquisition of voltage by the PCB 3, a buffer structure 14 is formed between the connecting structure 13 and the welding parts 12, and the buffer structure 14 provides a certain elastic space for stretching between the welding parts 12 and the connecting structure 13.

It will be appreciated that the buffer structure 14 may be disposed near the connection structure 13, may be disposed near the soldering portion 12, or may be disposed in the middle of the middle portion of the soldering portion 12 and the connection structure 13, which is not particularly limited, and only when the distance between the two soldering portions 12 is increased, the buffer structure 14 may provide a buffer effect between the soldering portion 12 and the connection structure 13, so as to avoid the problem of tearing or desoldering at the soldering portion between the soldering portion 12 and the battery cell 2.

Referring to fig. 1 to 4, in the case of long-term use of the battery cell assembly, when the battery cell 2 expands, the distance between the adjacent battery cells 2 increases, so that the distance between the two welding parts 12 of the welding connection piece body 1 on the adjacent battery cell 2 increases, at this time, since the connection structure 13 of the bending part 11 is limited on the PCB board 3, the connection structure 13 and the welding part 12 are subject to tensile force, so that the buffer structure 14 can be unfolded, and then the problem that the welding part 12 tears or is unwelded on the battery cell 2 is avoided, thereby effectively improving the use effect of the present application and having practicability.

In one embodiment, the bend of the buffer structure 14 is a circular arc transition.

Referring to fig. 1 and 2, it can be understood that the connecting piece is used for connecting the PCB board 3 and the battery cell 2, and the connecting piece plays the overcurrent role, and through setting up the circular arc structure, the overcurrent capacity of the connecting piece body 1 can be guaranteed, the result of use of this application is improved.

It should be noted that the shape of the buffer structure 14 may be a convex arc structure or a continuous wave structure.

In one embodiment, the end of the connection structure 13 is extended to form a connection unit 131.

Referring to fig. 1 and 2, the connection unit 131 is used as an extension of the connection structure 13 to connect with the PCB 3 in a solder connection manner, and a solder-covered portion of the connection unit 131 and the PCB 3 is a voltage collection point.

In one embodiment, the connection unit 131 is provided with a notch 132.

Referring to fig. 1 and 2, the notch 132 may be a sector, a circle, a triangle, etc., and the shape of the notch 132 is not limited. Through set up breach 132 on connecting unit 131, can increase connecting unit 131 and PCB board 3's area of contact, reduce the risk that connection piece body 1 breaks away from PCB board 3, improve the result of use of this application.

In one embodiment, the connecting piece body 1 is integrally formed. The connecting piece body 1 is integrally formed by stamping, and in this way, the connection strength and toughness of the connecting piece body 1 can be ensured.

In one embodiment, the portion between the weld 12 and the buffer structure 14 is inclined 10-15 ° relative to the weld 12; alternatively, the portion between the connecting structure 13 and the buffer structure 14 is inclined by 10 to 15 ° with respect to the welded portion 12; alternatively, the portion between the welded portion 12 and the connection structure 13 is inclined by 10 to 15 ° with respect to the welded portion 12.

It can be appreciated that, through this kind of mode, can be convenient for connection piece body 1 to punch a press, simultaneously, when the interval between two welded parts 12 increases, set up the part between welded part 12 and the connection structure 13 through the slope, can be convenient for buffer structure 14 to stretch and expand, effectively guarantee the joint strength between connecting piece body and the electric core 2.

In one embodiment, the thickness of the connecting piece body 1 is 0.3-0.5mm.

Referring to fig. 1 and 2, according to actual production requirements, the connecting piece with the thickness of the connecting piece body 1 being 0.3mm or 0.5mm can be selected, and the connecting piece is not particularly limited.

In one embodiment, the connecting piece body 1 is a nickel piece.

Referring to fig. 1 and 2, the nickel sheet is used as the connecting sheet body 1, so that the detection of the battery cell 2 with small overcurrent capacity can be met, and the nickel sheet has the characteristics of high specific capacity and excellent circulating function, and meets the use requirement.

Further, the utility model also provides a battery module, which is provided with the connecting sheet in any embodiment, the battery cell 2 and the PCB 3, and the connecting sheet is used for connecting the battery cell 2 and the PCB 3.

Further, the utility model also provides a vehicle provided with the battery module.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. A connecting tab, comprising:

2. The connection piece according to claim 1, characterized in that: the end of the connecting structure is extended to form a connecting unit.

3. The connection piece according to claim 2, characterized in that: the connecting unit is provided with a notch.

4. The connection piece according to claim 1, characterized in that: the bending part of the buffer structure is in arc transition.

5. The connection piece according to claim 1, characterized in that: the portion between the welded portion and the cushioning structure is inclined at 10-15 ° with respect to the welded portion.

6. The connection piece according to claim 1, characterized in that: the thickness of the connecting sheet body is 0.3-0.5mm.

7. The connection piece according to claim 1, characterized in that: the connecting sheet body is integrally formed.

8. A connecting piece according to any one of claims 1-7, characterized in that: the connecting sheet body is a nickel sheet.

9. A battery module comprising the connecting piece of any one of claims 1-8, and a battery cell and a PCB board, wherein the connecting piece is used for connecting the battery cell and the PCB board.

10. A vehicle comprising the battery module according to claim 9.