CN220492133U

CN220492133U - Multipolar ear coiled core and battery

Info

Publication number: CN220492133U
Application number: CN202123243390.XU
Authority: CN
Inventors: 黄海宁; 陈彦虎; 曹恋; 包瑞奇
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2024-02-13
Anticipated expiration: 2031-12-22

Abstract

The utility model relates to a multi-lug winding core and a battery, wherein the winding core comprises a plurality of groups of lugs arranged side by side, each group of lugs comprises a plurality of lugs (21) which are arranged side by side and have the same height, and the heights of the groups of lugs are distributed in a step shape. Compared with the prior art, the utility model has the advantages of high safety and reliability, low process difficulty and the like.

Description

Multipolar ear coiled core and battery

Technical Field

The utility model relates to the technical field of battery design and manufacturing, in particular to a multi-lug winding core and a battery.

Background

As the square aluminum shell battery cell designed by the prior multipolar lugs mostly firstly folds the lugs and then welds the folded lugs together in an ultrasonic or laser welding mode. Under such a process, there are different tab height requirements for the uppermost tab and the lowermost tab of the winding core, as shown in fig. 3, 4 and 5, the tab folding distance of the outer tab is shorter, the required tab height is smaller, the required folding tab travel of the battery core by the inner tab is longer, and the required tab height is longer. At present, the heights of the lugs of most square aluminum shell battery coil core designs are equal, redundancy exists in the lugs with redundant heights at the places where the lugs are folded in a short way, the lugs are generally concentrated in the outer area of the battery core, the redundant parts of the lugs are easy to contact with the shell, and then internal short circuits occur, and certain welding rosin joint possibly exists in the places where the lugs are folded in a long way, or after the welding is finished, in the process of folding the lugs, the lugs are torn due to insufficient length of the lugs, and further the internal resistance of the coil core is large.

The conventional solution is that after the pole lugs are folded and welded, a procedure is added to cut the folded or folded and pre-welded pole lugs, redundant parts of the pole lugs are cut off, metal scraps are possibly introduced in the cutting process, and risks of short circuit, high self-discharge and the like in the battery cells are further brought.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a multi-lug winding core and a battery, which have high safety and reliability and low process difficulty.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a multipolar ear core of rolling up, includes the utmost point ear group that a plurality of groups set up side by side, and every group utmost point ear group is including a plurality of pieces set up side by side and the utmost point ear that highly is the same, and the height of a plurality of group utmost point ear group is the echelonment and distributes.

Further, the tabs included in each tab group are the same in number.

Further, the heights of the groups of the lugs are distributed in an equal gradient manner.

Further, the number of the tab groups is not less than two.

Further, the heights of the groups of the lugs are increased in a step-like manner.

Further, the heights of the groups of the lugs are gradually decreased in a step shape.

A battery comprising said winding core.

Further, the battery is a square battery.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The multi-lug winding core enables the heights of a plurality of groups of lug groups arranged side by side to be gradually increased or decreased, avoids the abnormal conditions of redundant lugs generated by longer lugs and false welding, lug tearing and breakage generated by shorter lugs, has better improvement effect particularly for thicker winding cores, and can improve the safety and reliability of winding core design and manufacture;

(2) All tabs in the tab group have the same height, so that the process difficulty of processing the tabs can be greatly reduced, the hardware cutting die and the laser die cutting can be conveniently realized, and meanwhile, the equipment monitoring is convenient;

(3) The number of the tab groups is not less than two, the tab groups of each group contain the same number of the tabs, and the heights of the tab groups of the groups are distributed in an equal gradient manner, so that the processing and the equipment monitoring are convenient.

Drawings

FIG. 1 is a perspective view of a multipolar ear winding core;

FIG. 2 is a side view of a multi-lug winding core;

fig. 3 is a front view of a conventional prismatic battery;

FIG. 4 is a section A-A of FIG. 3;

FIG. 5 is an enlarged schematic view of FIG. 4 at B;

the reference numerals in the figures illustrate:

1. and (2) winding the core and 2. The pole lugs.

Detailed Description

The utility model will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present utility model, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present utility model is not limited to the following examples.

Example 1

A multipolar ear winding core, as shown in fig. 1 and 2, comprises a plurality of groups of lugs arranged side by side, each group of lugs comprises a plurality of lugs 2 which are arranged side by side and have the same height, and the heights of the groups of lugs are distributed in a step shape.

The multipolar ear winding core provided by the embodiment enables the heights of a plurality of groups of the pole ear groups arranged side by side to be gradually increased or decreased in a gradient manner, avoids the pole ear redundancy caused by longer pole ears 2 and the abnormal conditions of cold joint, pole ear tearing and breakage caused by shorter pole ears 2, and has better improvement effect particularly for thicker winding cores, and the safety and the reliability of winding core design and manufacture can be improved.

The number of the electrode lugs 2 in each group of electrode lugs can be flexibly adjusted according to the size of the battery cell and the production process.

All lugs 2 in the lug group have the same height, the process difficulty of processing the lugs can be greatly reduced, and the hardware cutting die and the laser die cutting can be conveniently realized, and meanwhile, the equipment monitoring is convenient.

The number of the tab groups is not less than two groups, and the heights of the tab groups of a plurality of groups are increased in a step-shaped manner or increased in an increasing manner.

The number of the lugs 2 contained in each group of lugs is the same, and the heights of a plurality of groups of lugs are distributed in an equal gradient manner, so that the processing and the equipment monitoring are facilitated.

Example 2

A battery comprising a winding core 1 according to embodiment 1, the battery being a prismatic battery.

Embodiment 1 and embodiment 2 propose a multipolar ear and roll up core and battery, to a plurality of groups of pole ear group, the group is inside to unify highly, highly is gradient distribution between the group, effectively improves short pole ear and breaks the problem and the pole ear redundancy problem of high pole ear, especially to thicker roll up the core, improves the effect better, has promoted the fail safe nature of roll up core design and manufacturing.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. The utility model provides a multipolar ear core of rolling up which characterized in that, including a plurality of groups utmost point ear group that set up side by side, every group utmost point ear group includes that a plurality of pieces set up side by side and highly the same utmost point ear (21), the height of the utmost point ear group that a plurality of groups set up side by side is the echelonment and distributes.

2. A multi-tab winding core according to claim 1, characterized in that each group of tabs comprises the same number of tabs (21).

3. The multipole ear winding core according to claim 1, wherein the heights of the groups of the pole ears are distributed in an equal gradient.

4. The multipole ear winding core of claim 1, wherein the number of groups of tabs is not less than two.

5. The multipole ear winding core according to claim 1, wherein the heights of the groups of the pole ears are increased stepwise.

6. The multipole ear winding core according to claim 1, wherein the heights of the groups of the pole ears are decreased stepwise.

7. A battery, characterized in that it comprises a winding core (1) according to any one of claims 1 to 6.

8. A battery according to claim 7, wherein the battery is a prismatic battery.