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Lithium battery structure and assembly method thereof

A lithium battery and component technology, applied in the field of lithium battery structure and assembly, can solve the problems of lithium battery short circuit lithium battery, etc., to achieve the effect of improving energy density, saving consumption, 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 of short circuit of the lithium battery caused by a large amount of metal dust generated when the connecting piece and the cover plate are welded into the core in the prior art and how to improve the energy density of the lithium battery

Method used

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  • Lithium battery structure and assembly method thereof
  • Lithium battery structure and assembly method thereof
  • Lithium battery structure and assembly method thereof

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Embodiment 1

[0069] see Figure 1 to Figure 8 , a lithium battery structure disclosed in the present invention includes two winding core components 1, a connecting piece component 2, a cover plate component 3, an insulating tape 4, an insulating film 5 and an aluminum shell component 6; the winding core component 1 and the connecting piece component 6; 2 is fixedly connected, the connecting piece assembly 2 is fixedly connected with the cover plate assembly 3, the insulating tape 4 covers the connection between the winding core assembly 1 and the connecting piece assembly 2, and the insulating film 5 covers the outside of the multiple winding core assemblies The winding core assembly 1 , the connecting piece assembly 2 , the insulating tape 4 and the insulating film 5 are all placed in the aluminum shell assembly 6 , and the aluminum shell assembly 6 is fixedly connected with the cover plate assembly 3 .

[0070] see Figure 9 , the core assembly 1 includes a core body 11 and a pole lug, ...

Embodiment 2

[0085] see Figure 22 and Figure 23 , the same as the first embodiment, the difference is that the number of winding core assemblies 1 in this embodiment is four; Close together, and then the two tabs are placed between the connecting piece and the protective piece, and then the two tabs, the connecting piece and the protective piece are fixed by welding.

[0086] see Figure 1 to Figure 23 , the assembling method of a lithium battery structure disclosed in this embodiment is the same as that of the first embodiment, and the difference is step S3 and step S4;

[0087] S3: as Figure 22 and Figure 23 As shown, first bend the same end of the positive electrode connecting piece 21 and the negative electrode connecting piece 22 along the bending stress hole 23 toward the back of the cover plate assembly 3 by 90 degrees. At this time, the two core assemblies 1 follow the connecting piece. The bending is also folded 90 degrees toward the back of the cover plate assembly 3, an...

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Abstract

The invention discloses a lithium battery structure and an assembly method thereof, and relates to the technical field of lithium ion batteries. Comprising a plurality of roll core assemblies, a cover plate assembly, a connecting piece assembly and an aluminum shell assembly. The roll core assembly comprises a tab, the connecting sheet assembly comprises a boss and a bending stress hole, and the cover plate assembly comprises a pole; the terminal post is provided with a terminal post hole, the connecting piece assembly and the cover plate assembly are fixed through the boss and the terminal post hole in the terminal post, the connecting piece assembly and the tab on the roll core assembly are fixed, and the connecting piece assembly is bent through the bending stress hole; the multiple roll core assemblies and the connecting piece assemblies are arranged in the aluminum shell assembly together, and the aluminum shell assembly is fixed to the cover plate assembly. According to the lithium battery structure and the assembling method thereof, 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 a roll core to cause short circuit of a lithium battery can be solved, and the energy density of the lithium battery can be improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium battery structure and an assembly method thereof. Background technique [0002] The current traditional lithium battery assembly method is as follows: ①. Use the "butterfly welding" process to connect two single winding cores together, that is, weld the two poles of the same polarity together through the connecting piece by ultrasonic welding; ②. The sheet is welded together with the corresponding pole 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. Insert it into the aluminum shell, and complete the sealing welding of the cover plate and the aluminum shell by laser. [0003] This method mainly has the following defects: [0004] 1. During the laser welding process of the connecting piece and the cover plate, a large amount of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M10/058H01M10/0587
CPCH01M10/052H01M10/058H01M10/0587Y02E60/10Y02P70/50
Inventor 高冲程辉吴德
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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