CN219658935U

CN219658935U - Multi-pin connecting sheet and battery core

Info

Publication number: CN219658935U
Application number: CN202320985134.8U
Authority: CN
Inventors: 霍涛涛; 杨恒峰; 蒋治亿; 占莎
Original assignee: Trina Energy Storage Solutions Jiangsu Co Ltd
Current assignee: Trina Energy Storage Solutions Jiangsu Co Ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-09-08
Anticipated expiration: 2033-04-27

Abstract

The utility model provides a multi-pin connecting sheet and a battery cell, wherein the multi-pin connecting sheet comprises: a connecting piece body; the connecting piece body comprises a supporting part and a plurality of pin parts; the plurality of pin parts are fixedly arranged on the supporting part. Through setting up the connection piece body into a plurality of pin portions and setting up on the supporting part, lighten connection piece self weight when can realizing a plurality of tab welding, the welding of many welding position can be realized to the high-capacity electric core, has reduced the length of tab.

Description

Multi-pin connecting sheet and battery core

Technical Field

The utility model relates to the field of lithium batteries, in particular to a multi-pin connecting sheet and a battery cell.

Background

At present, secondary batteries are developed towards a large capacity, and when the large capacity batteries are designed in a module mode, the number of parts can be saved, the large capacity can be realized by using fewer battery cores, and the advantages of reducing the cost and improving the capacity density of unit volume are achieved.

Limited by the defects of the existing winding technology, when the bare cell is wider, the alignment degree of the positive electrode and the negative electrode in the cell cannot be ensured, so that the separator cannot insulate the positive electrode and the negative electrode, and the risk of internal short circuit exists. Therefore, the realization difficulty of the large battery cell in the width direction is high.

In order to reduce the consumption of the tab during the welding process, the welding area between the tab and the connecting sheet is generally designed to be oblong, and the tab is narrow in width and long in length. At this time, if the electrode lugs of the battery cell are dislocated, special-shaped welding can be caused, the width of the connecting sheet in the width direction can be greatly increased, and the whole weight of the battery cell is not facilitated.

The above problems are currently in need of solution.

Disclosure of Invention

The utility model aims to provide a multi-pin connecting sheet and a battery cell, so that the condition that a large-capacity battery cell has enough welding area in the thickness direction of a core package is satisfied.

In order to solve the above technical problems, the present utility model provides a multi-pin connecting piece, comprising:

a connecting piece body;

the connecting piece body comprises a supporting part and a plurality of pin parts;

the plurality of pin parts are fixedly arranged on the supporting part.

Further, a plurality of the pin portions are provided on one side of the supporting portion.

Further, a plurality of the pin portions are provided on both sides of the supporting portion.

Further, the support portion is provided with a post welding region.

Further, one end of the pin part far away from the supporting part is provided with a tab welding area.

The utility model also provides a battery cell which comprises a plurality of core packages and a plurality of multi-pin connecting sheets.

Further, the plurality of core packages are arranged along the thickness direction of the core packages and/or the width direction of the core packages;

the multi-pin connecting sheet is welded to connect the lugs of the core package in the thickness direction.

Further, the pin part of the multi-pin connecting sheet is welded on the tab of the core pack through ultrasonic welding.

Further, the multi-pin connection sheet is disposed above the core pack.

Further, the battery cell further comprises a plurality of poles;

the polar posts are welded on the supporting parts of the corresponding multi-pin connecting sheets and are arranged above the multi-pin connecting sheets.

Further, the polarities of the adjacent tabs of the adjacent core packages are the same.

Further, the length of the lead part is greater than the length of the tab of the core pack.

The beneficial effects of the utility model are as follows: the utility model provides a multi-pin connecting sheet and a battery cell, wherein the multi-pin connecting sheet comprises: a connecting piece body; the connecting piece body comprises a supporting part and a plurality of pin parts; the plurality of pin parts are fixedly arranged on the supporting part. Through setting up the connection piece body into a plurality of pin portions and setting up on the supporting part, lighten connection piece self weight when can realizing a plurality of tab welding, the welding of many welding position can be realized to the high-capacity electric core, has reduced the length of tab.

Drawings

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

Fig. 1 is a schematic structural diagram of a multi-pin connecting piece according to the present embodiment.

Fig. 2 is a schematic diagram of another structure of the multi-pin connection pad according to the present embodiment.

Fig. 3 is a schematic diagram of a state of the battery cell according to the present embodiment.

Fig. 4 is a schematic diagram of a state of the battery cell after the battery cell is assembled according to the present embodiment.

In the figure: 100. a connecting piece body; 110. a support part; 120. a lead portion; 200. a core pack; 300. a tab; 400. a pole.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

Referring to fig. 1, the embodiment provides a multi-pin connecting piece, which includes: a connecting piece body 100; the connecting piece body 100 includes a supporting portion 110 and a plurality of lead portions 120; the plurality of lead parts 120 are fixedly disposed on the supporting part 110. Through designing the connection piece body 100 to be a plurality of lead portions 120 and setting up on the supporting part 110, the connection piece self weight of lightening when can realizing that a plurality of tabs 300 weld, the welding of many welding position can be realized to the high-capacity electric core, has reduced the length of tab 300.

In this embodiment, the support portion 110 is provided with a welding area of the pole 400. The end of the lead part 120 far away from the supporting part 110 is provided with a tab 300 welding area.

In the present embodiment, the connection piece body 100 is integrally formed.

Embodiment 2 referring to fig. 2, the present embodiment provides a multi-pin connecting piece having the same structure as that of embodiment 1, and further defines the arrangement position of the pin portion 120.

In this embodiment, a plurality of the lead parts 120 are disposed at one side of the supporting part 110.

It should be noted that, the installation position of the lead portion 120 on the supporting portion 110 is adapted to the installation position of the tab 300 of the core pack 200.

Through designing the connection piece body 100 to be a plurality of lead portions 120 and setting up on the supporting part 110, the connection piece self weight of lightening when can realizing that a plurality of tabs 300 weld, the welding of many welding position can be realized to the high-capacity electric core, has reduced the length of tab 300.

Embodiment 3 referring to fig. 1, the present embodiment provides a multi-pin connecting piece having the same structure as that of embodiment 1, and further defines the arrangement position of the pin portion 120.

In this embodiment, a plurality of the lead parts 120 are disposed at both sides of the supporting part 110.

Embodiment 4 referring to fig. 3-4, the present embodiment provides a battery cell, where the battery cell 200 includes a plurality of core packages 200 and a plurality of multi-pin connection pads provided in embodiments 1-3; the plurality of core packages 200 are arranged in a thickness direction of the core package 200 and/or a width direction of the core package 200; the multi-pin connection pad is welded to connect the tabs 300 of the core pack 200 in the thickness direction. Through designing the connection piece body 100 to be a plurality of lead portions 120 and setting up on the supporting part 110, the connection piece self weight of lightening when can realizing that a plurality of tabs 300 weld, the welding of many welding position can be realized to the high-capacity electric core, has reduced the length of tab 300.

Specifically, there are A bare cells in the X direction (the width direction of the core pack 200), and B bare cells in the Y direction (the thickness direction of the core pack 200), wherein A is not less than 1, preferably not less than 2, and B is not less than 1, preferably not less than 2. The single bare cell 20 has a body portion 21 and a positive electrode tab 30022, and a negative electrode tab 30023, wherein the projection positions of the positive electrode tab 300 and the negative electrode tab 300 in the X direction are identical, and the positive electrode tab 300 and the negative electrode tab 300 in the Y direction are arranged in a staggered manner, that is, the positive electrode tab 30022-the negative electrode tab 30023-the positive electrode tab 30022. The arrangement mode of the positive and negative electrode posts 400 is consistent with that of the positive and negative electrode lugs 300, and different battery cells are connected with the positive (negative) connecting sheet 30 (40) in the X & Y direction in a welding mode, so that the bare battery cells can be continuously arranged in the X & Y direction in a wireless mode without limitation. Meanwhile, the battery cell is provided with lower x 'plastic nails 50 and y' sealing aluminum sheets 60. Where x '=x, y' =y. When the battery cell is thicker, the structure can be duplicated in the thickness direction according to the requirement, so that the overall injection, pressure relief and overcurrent effects of the battery cell are ensured.

In this embodiment, the lead portion 120 of the multi-lead tab is welded to the tab 300 of the core pack 200 by ultrasonic welding.

In this embodiment, the multi-pin connection pad is disposed above the core package 200.

In this embodiment, the battery cell further includes a plurality of poles 400; the pole 400 is welded on the supporting portion 110 of the corresponding multi-pin connection piece, and is disposed above the multi-pin connection piece.

In this embodiment, the length of the lead portion 120 is greater than the length of the tab 300 of the core pack 200. Because the tab 300 is dislocated during the winding process, the length of the lead portion 120 is designed to be greater than the length of the tab 300, thereby meeting the welding requirement of the tab 300 and avoiding special-shaped welding.

The utility model provides a multi-pin connecting sheet and a battery cell, wherein the multi-pin connecting sheet comprises: a connecting piece body 100; the connecting piece body 100 includes a supporting portion 110 and a plurality of lead portions 120; the plurality of lead parts 120 are fixedly disposed on the supporting part 110. Through designing the connection piece body 100 to be a plurality of lead portions 120 and setting up on the supporting part 110, the connection piece self weight of lightening when can realizing that a plurality of tabs 300 weld, the welding of many welding position can be realized to the high-capacity electric core, has reduced the length of tab 300.

The components (components not illustrating the specific structure) selected in the present utility model are common standard components or components known to those skilled in the art, and the structures and principles thereof are known to those skilled in the art through technical manuals or through routine experimental methods. Moreover, the software program designed by the utility model is the prior art, and the utility model does not design any improvement on the software program.

In the description of embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims

1. A multi-pin connection pad comprising:

a connecting piece body;

the plurality of pin parts are fixedly arranged on the supporting part.

2. The multi-pin connection pad of claim 1, wherein,

the plurality of pin portions are disposed on one side of the supporting portion.

3. The multi-pin bond pad of claim 2 wherein,

the plurality of pin parts are arranged on two sides of the supporting part.

4. The multi-pin bond pad of any of claim 2 or 3,

the support portion is provided with a post welding region.

5. The multi-pin bond pad of any of claim 2 or 3,

and one end of the pin part, which is far away from the supporting part, is provided with a tab welding area.

6. A battery cell comprising a plurality of cell packs and a plurality of multi-pin bond pads as claimed in any one of claims 1 to 5.

7. The cell of claim 6, wherein the electrode is,

the plurality of core bags are arranged along the thickness direction of the core bags and/or the width direction of the core bags;

8. The cell of claim 7, wherein the pin portion of the multi-pin tab is ultrasonically welded to the tab of the core pack.

9. The cell of claim 8, wherein the multi-pin tab is disposed above the core pack.

10. The cell of claim 9, wherein the cell further comprises a plurality of posts;

11. The cell of claim 7, wherein adjacent tabs of adjacent core packages have the same polarity.

12. The cell of claim 7, wherein the length of the lead portion is greater than the length of the tab of the core pack.