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Folding lithium ion battery polar group and its producing method

A lithium-ion battery, foldable technology, applied in the field of lithium-ion batteries, can solve the problem of difficult control of pole piece alignment, achieve the effect of solving the difficulty of pole piece alignment, improving utilization rate, and reducing design difficulty

Inactive Publication Date: 2006-03-22
TIANJIN LISHEN BATTERY
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AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a lithium-ion battery pole group and a manufacturing method in order to solve the pole group production under high coating amount, so as to overcome the problem of difficulty in controlling the alignment of pole pieces in manual and machine production

Method used

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  • Folding lithium ion battery polar group and its producing method
  • Folding lithium ion battery polar group and its producing method
  • Folding lithium ion battery polar group and its producing method

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Embodiment Construction

[0031] The present invention will be further described in detail according to the accompanying drawings and embodiments.

[0032] The electrode of the lithium-ion battery is much larger than the positive electrode LiCoO due to the specific capacity of the negative electrode graphite 2 Therefore, it is the positive electrode sheet that enhances the uncoilability of the electrode under a high coating amount, and the winding of the negative electrode sheet is no problem. Therefore, the first consideration of the present invention is to stack the positive electrode sheet, and the negative electrode sheet does not Changed pole group production mode. However, it is not feasible to wind the negative electrode sheet, because the size of the positive electrode will be uneven, and there will be many difficulties in the manufacture of such a positive electrode sheet, although this will solve the positioning problem of the positive electrode sheet. Therefore, the negative electrode sheet...

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Abstract

This invented ionic battery pole group includes strip-like negative pole plates, multiple sheet positive pole plates, membranes, ears of positive and the negative poles, in which, the hems at one end of the negative plates are fixed to a lamination state, the positive plates are set at the folded place of the negative and their collectors are fixed together, the lamination is even, a positive pole plate covered by the membrane is set at each folded place, the ear of the negative is fixed on the collector of the negative, the ear of the positive is fixed at the collector of any positive pole plate and the entire group is wrapped by a membrane. This invention also provides a manufacturing method for the pole group, which solves the problem of positioning of the pole plates and their alignment.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to an electrode group of the lithium ion battery. Background technique [0002] The production of battery electrode group is the basic step of battery production, which directly affects the performance of the battery. The production of battery pole groups mainly includes winding and laminated technologies. Both of these two technologies can be produced by hand or by automated mass production. Both of these technologies still exist in the production of batteries today; the laminated type is similar to the winding type in operation due to automation ; There is not much difference in the appearance of wound batteries and laminated batteries, but there are differences in electrical properties such as safety performance, but the requirements for their electrical properties as commercialized batteries are the same, and they should all meet existing safety standards. [0003] The production of w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/00H01M4/04H01M10/38H01M10/40H01M4/13H01M4/139
CPCY02E60/122Y02E60/10
Inventor 马忠龙卢鑫孙菲张丽娜任长媛
Owner TIANJIN LISHEN BATTERY
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