CN221041456U

CN221041456U - Anti-off-welding connection structure for battery cell electrode

Info

Publication number: CN221041456U
Application number: CN202322568273.3U
Authority: CN
Inventors: 蔡宇; 秦丽; 余明
Original assignee: Wuxi Ailiwang New Energy Co ltd
Current assignee: Wuxi Ailiwang New Energy Co ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-05-28
Anticipated expiration: 2033-09-21

Abstract

The utility model discloses an anti-disengaging welding connection structure of a battery cell electrode, which comprises a conductive structure body bridged between two electrodes, wherein end structures at two ends of the conductive structure body are respectively connected with two electrode terminals; the connecting part between the two end structures is an elastic structure; the elastic structure is provided with a switching structure layer. The utility model ensures the combination and reliability of the welding parts among conductors of different materials, provides the dimensional elasticity, shares the stress and avoids the phenomenon of off-welding caused by the concentration of the stress at the welding parts.

Description

Anti-off-welding connection structure for battery cell electrode

Technical Field

The utility model relates to the technical field of electrode connection structures, in particular to an anti-disengaging welding connection structure of a battery cell electrode.

Background

In the battery module, a plurality of battery cells are connected in series and parallel to form the battery module, two battery cell electrodes to be connected are usually connected through conductor material welding, and a sampling line is usually required to be additionally connected to a protection plate at a connecting position, so that the conductor material at the connecting position is diversified, the welding combination property is relatively poor, in use, when the battery cells are bulged and the like, the generated stress is easily concentrated at the welding position, the welding reliability is low due to the poor combination property, the influence of the stress is large, the welding release phenomenon is easily caused, and the potential safety hazard exists.

Disclosure of Invention

The utility model aims to: in order to overcome the defects in the prior art, the utility model provides an anti-off-welding connection structure of a battery cell electrode, which ensures the combination and reliability of welding positions among conductors of different materials, provides dimensional elasticity, shares stress and avoids off-welding caused by concentration of stress at the welding positions.

The technical scheme is as follows: in order to achieve the above purpose, the anti-disengaging welding connection structure of the battery cell electrode of the utility model comprises a conductive structure body bridged between two electrodes, wherein end structures at two ends of the conductive structure body are respectively connected with two electrode terminals; the connecting part between the two end structures is an elastic structure; the elastic structure is provided with a switching structure layer.

Further, the end structure and the electrode terminal are of the same conductor material.

Further, the elastic structure is a bent groove-shaped structure, the two end structures are fixedly connected to the edges of the groove walls at the two sides respectively, and the switching structure is positioned on the bottom surface of the groove.

Further, the conductive structure is a unitary structure.

Further, the electrode is an aluminum pole, and the conductive structure body adopts an aluminum connecting sheet.

Further, the switching structure layer is a nickel sheet fixedly connected to the elastic structure.

The beneficial effects are that: according to the anti-off-welding connection structure of the battery cell electrode, through the addition of the elastic connection structure, the two connected electrodes have enough size elasticity, so that stress generated by phenomena such as battery bulge and the like can be shared, and the stress cannot be concentrated at a welding position, so that off-welding is avoided. Meanwhile, a connecting sheet which is made of the same material as the electrode is adopted on the structural material, so that the photo-welding combination property is good; selecting a material which is easy to solder on the material of the switching structure layer, thereby ensuring the firm welding of the sampling line; thereby playing the role of preventing the connection between conductors made of various materials from being detached.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model.

Detailed Description

The utility model will be further described with reference to the accompanying drawings.

The anti-disengaging welding connection structure of the battery cell electrode as shown in fig. 1 comprises a conductive structure body 1 bridged between two electrodes, wherein end structures 11 at two ends of the conductive structure body 1 are respectively connected with two electrode terminals; the connecting part between the two end structures 11 is an elastic structure 12; the elastic structure 12 is provided with a transfer structure layer 2.

According to the scheme, the elastic structure is arranged between the end structures connected with the two electrodes, so that elasticity of some sizes can be provided, and when the battery cell bulges, the stress can be shared, so that the phenomenon of off-welding caused by concentration of the stress at the welding position is avoided.

The connection part of the two battery core electrodes is usually required to be connected with a sampling line for connecting with a protection board, so as to play a role of monitoring and protecting a circuit. The switching structure layer is used for connecting the sampling lines.

Preferably, the end structure 11 and the electrode terminals are of the same conductor material. The welding combination property of the same material is better, so that the phenomenon of off-welding is less likely to occur.

The elastic structure 12 is a bent groove-shaped structure, the two end structures 11 are fixedly connected to the edges of the groove walls at the two sides respectively, and the switching structure layer 2 is positioned on the bottom surface of the groove. The groove-shaped structure formed by bending the metal conductor material forms an elastic structure relative to the groove bottom at the groove walls at the two sides, so that the end structures fixedly connected to the groove walls at the two sides respectively have dimensional elasticity, and the purpose of sharing stress and avoiding desoldering is achieved. And when the groove wall is elastically deformed under stress, the influence on the transfer structure layer at the groove bottom is very small, so that the phenomenon of welding off at the transfer sampling line is avoided.

Preferably, the conductive structure 1 is a unitary structure. The electrode can be directly processed by adopting a metal sheet which is made of the same material as the electrode, and after being cut into a proper shape and size, the middle part is bent to form an elastic structure.

Examples:

The electrode is an aluminum pole, and the conductive structure body 1 adopts an aluminum connecting sheet. The switching structure layer 2 is a nickel sheet fixedly connected to the elastic structure 12.

When the aluminum electrode is applied to an electric core electrode which is an aluminum electrode column, the middle part of the aluminum sheet is selected to be bent to form a groove, the groove is positioned between the electrode columns, the aluminum sheets at two sides of the bent part are attached to the end face of the electrode column, and laser welding is adopted, so that the aluminum electrode is good in laser welding combination property and not easy to be influenced by stress. The sampling lines are connected by adopting a soldering process, and the nickel sheet is adopted as a switching structural layer because aluminum is not well soldered, so that soldering and aluminum sheet on the sampling lines are facilitated, and potential safety hazards caused by failure in timely finding abnormality due to desoldering of the sampling lines are avoided.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.

Claims

1. An electric core electrode anticreep welds connection structure, its characterized in that: the electrode structure comprises a conductive structure body (1) bridged between two electrodes, wherein end structures (11) at two ends of the conductive structure body (1) are respectively connected with two electrode terminals; the connecting part between the two end structures (11) is an elastic structure (12); the elastic structure (12) is provided with a transfer structure layer (2).

2. The electrical core electrode anti-disengaging welding connection structure according to claim 1, wherein: the end structure (11) and the electrode terminal are of the same conductor material.

3. The cell electrode anti-disengaging welding connection structure according to claim 2, wherein: the elastic structure (12) is a bent groove-shaped structure, the two end structures (11) are fixedly connected to the edges of groove walls at two sides respectively, and the switching structure layer (2) is positioned on the bottom surface of the groove.

4. A cell electrode anti-disengaging welding connection structure according to claim 3, wherein: the conductive structure body (1) is of an integrated structure.

5. The electrical core electrode anti-disengaging welding connection structure according to claim 4, wherein: the electrode is an aluminum electrode column, and the conductive structure body (1) adopts an aluminum connecting sheet.

6. The electrical core electrode anti-disengaging welding connection structure according to claim 5, wherein: the switching structure layer (2) is a nickel sheet fixedly connected with the elastic structure (12).