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Multi-roll-core structure of lithium battery and assembly method of multi-roll-core structure

A lithium battery, winding core technology, applied in secondary batteries, structural parts, battery pack components, etc., can solve problems such as short circuit of lithium batteries, and achieve the effect of avoiding short circuit, improving process adaptability, and avoiding the risk of short circuit

Pending Publication Date: 2022-03-08
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is: how to solve the problem in the prior art that a large amount of metal dust generated when the connecting piece and the cover plate are welded enters the inside of the winding core and causes a short circuit of the lithium battery and how to realize the assembly operation of any number of winding cores for the lithium battery

Method used

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  • Multi-roll-core structure of lithium battery and assembly method of multi-roll-core structure
  • Multi-roll-core structure of lithium battery and assembly method of multi-roll-core structure
  • Multi-roll-core structure of lithium battery and assembly method of multi-roll-core structure

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Embodiment 1

[0093] refer to figure 1 with figure 2 , a lithium battery multi-core structure disclosed in the present invention comprises two core assemblies 1, a connection assembly 2, a cover plate assembly 3, an insulating tape 4 and an aluminum shell (not shown); the core assembly 1 is connected to The component 2 is fixed, the connecting component 2 and the cover component 3 are fixed, the insulating tape 4 is wrapped on the joint between the core component 1 and the connecting component 2, the core component 1, the connecting component 2 and the cover component 3 are fixed and combined and inserted Inside the aluminum shell, the cover assembly 3 is fixed to the aluminum shell.

[0094] refer to figure 1 , the winding core assembly 1 includes a winding core body 11 and a pole lug, and the pole lug includes a positive pole lug 12 and a negative pole lug 13; the positive pole lug 12 and the negative pole lug 13 are respectively fixed on the two ends of the same end face of the windin...

Embodiment 2

[0110] refer to Figure 15 with Figure 16 , the same as the first embodiment, the difference is that the number of winding core assemblies 1 in this embodiment is three, one of the two connecting plates 21 of the connecting assembly 2 is welded and fixed with two winding core assemblies 1, and the other is welded and fixed There is a winding core assembly 1 .

[0111] The assembly method of a multi-roll core structure of a lithium battery disclosed in this embodiment is the same as that of Embodiment 1, except for step S2;

[0112] S2: Install the winding core assembly 1 on the connection assembly 2, one of the two connection plates 21 of the connection assembly 2 is welded and fixed with two winding core assemblies 1, and the other is welded and fixed with one winding core assembly 1, and the winding core assembly 1 The positive tab 12 on the top is welded and fixed to the positive connecting piece 22 on the connection assembly 2, and the negative tab 13 is welded and fixe...

Embodiment 3

[0114] refer to Figure 17 with Figure 18 , the same as the first embodiment, except that the number of winding core assemblies 1 in this embodiment is four, and the two connecting plates 21 of the connecting assembly 2 are respectively welded and fixed with two winding core assemblies 1 .

[0115] The assembly method of a multi-roll core structure of a lithium battery disclosed in this embodiment is the same as that of Embodiment 1, except for step S2;

[0116] S2: Install the winding core assembly 1 on the connecting assembly 2, the two connecting plates 21 of the connecting assembly 2 are respectively welded and fixed with two winding core assemblies 1, the positive pole lug 12 on the winding core assembly 1 and the positive pole on the connecting assembly 2 The connecting piece 22 is welded and fixed, and the negative electrode ear 13 and the negative electrode connecting piece 23 are welded and fixed; the insulating tape 4 is pasted on the welding area between the tab a...

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Abstract

The invention discloses a multi-roll-core structure of a lithium battery and an assembly method of the multi-roll-core structure, and relates to the technical field of lithium ion batteries. Comprising a plurality of roll core assemblies, a connecting assembly, a cover plate assembly and an aluminum shell, the roll core assembly comprises a pole lug, the connecting assembly comprises a stand column and a bending hole, the cover plate assembly comprises a pole, and a pole hole is formed in the pole; the connecting assembly and the cover plate assembly are fixed through the upright post and the pole post hole in the pole post, the connecting assembly and the pole lug on the roll core assembly are fixed, and the connecting assembly is bent through the bending hole; the roll core assembly, the connecting assembly and the cover plate assembly are combined and then placed in the aluminum shell, and the cover plate assembly is fixed to the aluminum shell. The problem that in the prior art, a large amount of metal dust generated when a connecting piece and a cover plate are welded enters roll cores, and consequently the lithium battery is short-circuited can be solved, and assembling work of any number of roll cores of the lithium battery can be achieved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a multi-roll core structure of lithium batteries and an assembly method thereof. Background technique [0002] The current traditional lithium battery cell assembly method is as follows: ①. Use the "butterfly welding" process to connect two single winding cores together, that is, use the connecting piece to weld the two poles of the same polarity together by ultrasonic waves; ②. The above-mentioned connecting pieces are welded together with the corresponding poles of the same polarity on the cover plate by laser, and the stop frame is buckled at the welding mark; ③. Merge the above two single-roll cores and fix them with binding tape; ④. The battery core is inserted into the aluminum shell, and the cover plate and the aluminum shell are sealed and welded by laser. [0003] This method mainly has the following defects: [0004] 1. During the laser welding process o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/533H01M50/536H01M50/552H01M50/566H01M50/593H01M50/30H01M10/0525H01M10/0587
CPCH01M50/533H01M50/536H01M50/566H01M50/552H01M50/593H01M50/30H01M10/0587H01M10/0525Y02E60/10Y02P70/50
Inventor 高冲程辉吴德
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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