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Battery cover assembly, its preparation method, single battery and battery pack

一种电池盖板、组件的技术，应用在电池盖/端盖、二次电池制造、电池组零部件等方向，能够解决影响电池输出、安全性能、电极与盖板连接不够稳固、密封性能不够理想等问题，达到减少移动颠簸、增加连接牢固性、利于规模化生产的效果

Active Publication Date: 2016-06-15
SHANGHAI BYD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention overcomes the problems that the connection between the electrode and the cover plate of the battery cover plate assembly in the prior art is not stable enough, the sealing performance is not ideal enough, the electrodes are easy to loosen during transportation and use, and the output and safety performance of the battery are affected.

Method used

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  • Battery cover assembly, its preparation method, single battery and battery pack
  • Battery cover assembly, its preparation method, single battery and battery pack
  • Battery cover assembly, its preparation method, single battery and battery pack

Examples

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preparation example Construction

[0037] The present invention also provides a preparation method for the above-mentioned battery cover plate assembly, including: setting a sealing layer on the surface of the electrode terminal and first performing surface treatment on the surface of the electrode terminal where the sealing layer needs to be set so that it has a microporous structure; setting the hollow rivet On the cover plate, the hollow part of the hollow rivet communicates with the through hole; pass the electrode terminal provided with the sealing layer through the hollow part of the hollow rivet and ensure that the sealing layer on the electrode terminal is at least partly in the hollow rivet; between the sealing layer and the hollow Injection molded insulation between rivets. The high temperature of injection molding makes the sealing layer and insulating parts in a molten state, and the viscous fluid state insulating material is fused with the surface of the molten sealing layer in contact with it under...

Embodiment 1

[0043] Such as figure 1 As shown, the cover plate assembly includes an electrode terminal 1, an insulator 2, a hollow rivet 3, a cover plate 4 and a sealing layer 5, and the cover plate 4 is provided with a through hole. The inner surface of the hollow rivet 3 is etched with concentrated hydrochloric acid for 20 minutes to form a microporous structure with a micropore diameter distribution of 10nm-1μm and an average micropore depth of 50nm-2μm. The inner surface is coated with the prepared oligomer coated polymer material PPS NMP solution, after drying, heated at 340 degrees until the coated polymer material melts, and then sintered for 30 minutes to form a dense sealing layer 5 . After connecting the hollow part of the hollow rivet 3 with the sealing layer 5 on the inner surface to the through hole on the cover plate 4, it is welded with the cover plate 4 to form an integral structure. The aluminum electrode terminal 1 is etched with concentrated hydrochloric acid and alkali...

Embodiment 2

[0045] Such as figure 2 , the cover plate assembly includes electrode terminals 1, insulators 2, hollow rivets 3, cover plate 4 and sealing layer 5, and the cover plate 4 is provided with through holes. The inner surface of the hollow rivet 3 is etched by concentrated hydrochloric acid and alkali for 20 minutes to form a microporous structure with a micropore diameter distribution of 50nm-2μm and a micropore depth of 200nm-2μm. The inner surface of the hollow rivet 3 is coated with The prepared oligomer is coated with an aqueous solution of polymer material PPS, dried, heated to 320° C. to melt the polymer material, and sintered for 30 minutes to form a dense sealing layer 5 . Carve two circles of concave sealing grooves 6 on the surface of the part of the aluminum electrode terminal 1 that needs to be sealed and connected with the cover plate 4, and etch with concentrated hydrochloric acid and alkali for 15 minutes to form a micropore size distribution of 50nm-2μm on the sur...

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Abstract

The invention provides a battery cover plate assembly, a preparation method thereof, a single battery and a battery pack. The battery cover plate assembly comprises a cover plate, a hollow rivet, an electrode terminal, a sealing layer and an insulation part, wherein the sealing layer is arranged between the electrode terminal and the insulation part, the material of the sealing layer comprises polymer, the sealing layer and the insulation part are fused with each other; a microcellular structure is distributed on the contact surface of the electrode terminal and the sealing layer. According to the battery cover plate assembly, the electrode terminal by arranging the sealing layer between the electrode terminal and the insulation part, the possibility of the deformation of the polymer insulation part caused by the various environment factors such as temperature can be reduced, especially, the influence on the sealing combination of the electrode terminal and the cover plate can be lowered, meanwhile, the binding force of organic metal and the cover plate assembly can be further enhanced, and the development demand on the existing battery can be met. The invention provides a single battery and a battery pack which have stable performance.

Description

technical field [0001] The present invention relates to the battery field, and more specifically relates to a battery cover assembly, a method for preparing the battery cover assembly, and a single cell and a battery pack containing the battery cover assembly. Background technique [0002] At present, due to its advantages of high energy and no pollution, batteries are more and more widely used in portable electronic products such as mobile phones and digital cameras, and also as backup energy for large equipment such as automobiles and space stations. , the requirements for its performance are not only improved. [0003] The battery cover assembly generally seals the battery by clamping the insulating member between the hollow rivet and the electrode terminal, or injects an adhesive on the contact surface between the insulating member and the electrode terminal to strengthen the seal. The insulating member is generally completed by direct injection molding, but this kind of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/04H01M2/08H01M10/00
CPCH01M10/04H01M2220/20H01M50/147H01M50/183Y02E60/10
Inventor 潘仪朱建华沈晞张中涛周良
Owner SHANGHAI BYD
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