Large soft pack lithium ion battery and preparation method thereof

A technology of lithium-ion batteries and ion batteries, which is applied in the manufacture of electrolyte batteries, large-sized batteries/battery packs, battery pack components, etc., can solve the problem of low stability, poor flatness, and large soft-pack lithium-ion battery production costs Advanced problems, to achieve the effect of good flatness, low cost, improved stability and safety

Pending Publication Date: 2018-07-27
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
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Problems solved by technology

[0005] In order to solve the technical problems of high production cost, poor flatness and low stability of the existing large soft-pack lithium-ion battery

Method used

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  • Large soft pack lithium ion battery and preparation method thereof
  • Large soft pack lithium ion battery and preparation method thereof
  • Large soft pack lithium ion battery and preparation method thereof

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

[0029] Such as Figure 5 Shown is the composition of a preferred embodiment of a large soft pack lithium-ion battery provided by the present invention. The large soft-packed lithium-ion battery includes: at least one full-tab winding core 3, and an insulating gasket 6 is correspondingly provided at the tab welding area 4 of the full-tab winding core, so that the tab welding area The overall thickness of 4 is consistent with the thickness of the main body of the full tab winding core 3 . The thickness of the large soft pack lithium-ion battery can be greater than 10.0mm. There can be two to six all-tab winding cores 3 . The insulating gasket 6 can be selected from one of polyethylene, polypropylene, polyimide, silica gel, polyvinyl alcohol or polypropylene alcohol. In this embodiment, the large soft-packed lithium-ion battery is formed by stackin...

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Abstract

The invention discloses a large soft pack lithium ion battery and a preparation method thereof. The preparation method comprises the steps of providing at least one full-plate lug wound core, whereinthe plate lug welding areas of the full-plate lug wound core are correspondingly provided with insulating gaskets, so that the overall thickness of the plate lug welding areas is identical to the mainbody thickness of the full-plate lug wound core. By means of the insulating gaskets in the plate lug welding area, the preparation method of the large soft pack lithium ion battery overcomes unevenness of recesses and avoids self discharge and short circuit due to excessive compression of encapsulated positive and negative plates, thereby improving the stability and safety of the large soft packlithium ion battery. Meanwhile, the preparation method of the large soft pack lithium ion battery can avoid displacement and short circuit of bent plate lugs relative to positive and negative plate coatings nearby the plate lug welding area during a grouping process to improve the grouping reliability. Besides, the large soft pack lithium ion battery processed through the insulating gaskets is flat in core winding, attractive in appearance and low in cost. The preparation method of the large soft pack lithium ion battery is particularly applicable to preparing relatively thick large soft packbatteries and ensures a battery thickness upper to greater than 10.0 mm.

Description

technical field [0001] The invention relates to the field of lithium-ion battery production, in particular to a relatively thick and large soft-pack lithium-ion battery and a preparation method thereof. Background technique [0002] Compared with cylindrical batteries and aluminum-cased prismatic batteries, pouch batteries using aluminum-plastic film have the advantages of light weight, small size, flexible design of external dimensions, and high safety. Therefore, it has a wide range of applications and is favored by many customers. The application of soft-pack batteries in the field of electric vehicles has been continuously promoted. This is an emerging field that promotes the application of lithium-ion batteries in the market after the application of lithium-ion batteries in the 3C market has basically reached saturation. The application potential of lithium-ion batteries in the field of energy storage is huge, and the energy storage market will be another market that pr...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01M2/02H01M10/058H01M50/10H01M50/531
CPCH01M10/058H01M50/10H01M50/531Y02E60/10Y02P70/50
Inventor 钟宽陈宝荣何意邹十美吴西燚
Owner GREE ELECTRIC APPLIANCES INC
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