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Battery cover plate assembly, preparation method thereof, single battery and battery pack

A battery cover and component technology, which is applied in the direction of battery cover/end cover, secondary battery manufacturing, battery pack components, etc., can solve the problem of insufficient connection between electrodes and cover plates, affecting battery output, safety performance, and insufficient sealing performance Ideal and other issues, to achieve the effect of reducing moving bumps, increasing connection firmness, and facilitating large-scale production

Inactive Publication Date: 2015-10-07
SHANGHAI BYD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 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 plate assembly, preparation method thereof, single battery and battery pack
  • Battery cover plate assembly, preparation method thereof, single battery and battery pack
  • Battery cover plate assembly, preparation method thereof, single battery and battery pack

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preparation example Construction

[0034] 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

[0041] Such as figure 1 , 2 , 4, the cover assembly includes an electrode terminal 1, an insulator 2, a hollow rivet 3, a cover 4 and a sealing layer 5, and the cover 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 NMP (N-methylpyrrolidone) solution of oligomer coated polymer material PPS (polyphenylene sulfide). After drying, it is heated at 340 degrees until the coated polymer material is melted. Sinter for 30 minutes until a dense sealing layer 5 is formed. 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...

Embodiment 2

[0043] Such as figure 1 , 3 , 4, the cover assembly includes an electrode terminal 1, an insulator 2, a hollow rivet 3, a cover 4 and a sealing layer 5, and the cover 4 is provided with a through hole. 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 surf...

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Abstract

The invention provides a battery cover plate assembly, a preparation method of the battery cover plate assembly, a single battery and a battery pack. The battery cover plate assembly comprises cover plates, hollow rivets, an electrode terminal, sealing layers and insulating parts, wherein the sealing layers are arranged between the electrode terminal and the insulating parts; the sealing layers in a fused state can be fused with the insulating parts; and microcellular structures are distributed on the surfaces contacted with the sealing layers, of the electrode terminal. The battery cover plate assembly has the following advantages: the sealing layers are arranged between the electrode terminal and the insulating parts and the electrode terminal is pretreated, thus reducing the influence of deformation, especially shrinkage of polymer insulating parts due to various environmental factors, such as temperature and the like on sealing combination of the electrode terminal and the cover plate, improving the binding force of the inorganic metals and the organic polymers, not only improving the connection firmness of the electrode terminal and the cover plate, but also further enhancing the sealing performance of the cover plate assembly and meeting the development requirements of the current batteries. The invention provides the single battery with more stable performance and the battery pack.

Description

[0001] related application [0002] This application is a divisional application of Chinese application number CN200910188461.5, filing date: 2009.11.28, invention name: battery cover assembly, its preparation method, single battery and battery pack. technical field [0003] 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 [0004] 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. [0005] The battery cover assembly generally seals the battery by clamping the insulating member between the holl...

Claims

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Application Information

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Patent Type & Authority Applications(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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