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Lithium ion battery structure and assembly method thereof

A lithium-ion battery and component technology, applied in the field of lithium-ion battery structure and assembly, can solve problems such as lithium-ion battery short-circuiting, and achieve the effects of saving consumption, avoiding short-circuit, and improving energy density

Pending Publication Date: 2022-03-11
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-ion 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-ion battery

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0066] refer to Figure 1 to Figure 4 , a lithium-ion battery structure disclosed in the present invention comprises two winding core assemblies 1, connecting piece assembly 2, cover plate assembly 3, insulating tape 4, insulating film 5 and aluminum shell assembly 6; winding core assembly 1 and connecting piece The components 2 are fixedly connected, the connecting piece component 2 is fixedly connected with the cover plate component 3, the insulating tape 4 is covered on the joint between the winding core component 1 and the connecting piece component 2, and the insulating film 5 is covered on the outside of the plurality of winding core components 1. 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 .

[0067] refer to Figure 5 The winding core assembly 1 includes a winding co...

Embodiment 2

[0082] refer to Figure 18 with Figure 19 , same as the first embodiment, except that the number of winding core assemblies 1 in this embodiment is four, and in this embodiment, the two positive tabs 12 and the two negative tabs 13 of the two winding core assemblies 1 correspond to close together, and then the two tabs are placed between the connection piece and the small protection piece, and then the two tabs, the connection piece and the protection piece are fixed by welding.

[0083] refer to Figure 1 to Figure 19 , the assembly method of a lithium-ion battery structure disclosed in this embodiment is the same as that of Embodiment 1, the difference is step S3 and step S4;

[0084] S3: if Figure 18 with Figure 19 As shown, first bend the same end of the positive connecting piece 21 and the negative connecting piece 22 by 90 degrees along the bending stress hole 24 toward the front of the cover plate assembly 3. At this time, both core assemblies 1 follow the connec...

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Abstract

The invention discloses a lithium ion 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 connecting piece assembly, a cover plate assembly and an aluminum shell assembly, each roll core assembly comprises a positive lug and a negative lug, each connecting piece assembly comprises a positive connecting piece and a negative connecting piece, bosses and bending stress holes are arranged on the positive connecting pieces and the negative connecting pieces respectively, and a pole is arranged on the cover plate assembly; the connecting sheet assembly and the cover plate assembly are fixed through a boss and a pole, the positive and negative connecting sheets are respectively fixed with the cover plate assembly and are respectively fixed with the positive and negative tabs, and the connecting sheet assembly is bent through a 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. The invention provides the lithium ion battery structure and the assembly method thereof, which can solve the problem of short circuit of the battery caused by a large amount of metal dust which is generated when a connecting sheet and a cover plate are welded into a roll core in the prior art, and can improve the energy density of the battery.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a lithium-ion battery structure and an assembly method thereof. Background technique [0002] The current traditional lithium-ion 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 through the connecting piece by ultrasonic welding; ②. The connecting piece 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. The core is inserted into the aluminum shell, and the sealing welding of the cover plate and the aluminum shell is completed by laser. [0003] This method mainly has the following defects: [0004] 1. During the laser welding process of the connecting piece and the cover ...

Claims

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Application Information

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IPC IPC(8): H01M10/0587H01M50/531H01M50/536H01M50/147H01M50/166H01M50/119
CPCH01M10/0587H01M50/531H01M50/536H01M50/147H01M50/166H01M50/119Y02E60/10Y02P70/50
Inventor 高冲程辉吴德
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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