Electric core structure of lithium battery and producing method thereof

A manufacturing method and technology for lithium batteries, which are applied in secondary batteries, final product manufacturing, non-aqueous electrolyte batteries, etc., can solve the problems of time-consuming and labor-intensive pole piece processing, affecting the overall thickness, and being unsightly, so as to improve production efficiency and improve productivity. Product quality, reduction of low voltage plateau, reduction of the effect of welding toe repair process

Active Publication Date: 2005-04-27
EVE ENERGY CO LTD
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Problems solved by technology

Because the pole pieces are very thin, the superimposed combination is extremely loose, it is difficult to bind and the two ends are lifted after binding, which is not beautiful but also affects the overall thickness, and causes difficulties for the next process; at the same time, the pole pieces of the same pole are independent of each other , the processing of the pole piece is time-consuming and laborious
Therefore, on the basis of the laminated type, a "single-piece" type winding battery cell appears, that is, the three layers after the positive electrode, separator, and negative electrode overlap are wound together around the core to the design value, and the winding method wastes more space. , the lead-out of the tab is also more complicated

Method used

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  • Electric core structure of lithium battery and producing method thereof
  • Electric core structure of lithium battery and producing method thereof
  • Electric core structure of lithium battery and producing method thereof

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Embodiment Construction

[0011] The cell structure and its manufacturing method disclosed in the present invention is an efficient and fast method for liquid flexible packaging or polymer lithium-ion cells, which is compatible with industrial production, and strives to combine the traditional laminated sheet structure after punching with the The combination of winding core structure simplifies the production process in actual production, speeds up the flow operation, and improves the packaging and sealing quality of formed batteries.

[0012] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0013] The invention eliminates the necessary punching process of the traditional stacked pole piece type lithium battery, and adopts the strip pole piece of the core type lithium battery type, so the positive pole piece 1, the negative pole piece 2 and the positive pole piece sandwiched between the positive pole piece and the negative pole piece a...

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Abstract

The present invention is the structure and making process of lithium cell core. The lithium cell core includes positive pole plate, negative pole plate and diaphragm in between, and they are in the same length and width and folded into zigzag. The positive pole plates and the negative pole plates are interpenetrated and arranged alternately in the angle of 90 deg. The present invention has homogeneous electrolyte distribution, fast electrolyte adsorbing speed and may be used in producing high quality lithium cell.

Description

technical field [0001] The invention relates to a lithium battery cell structure and a manufacturing method thereof, in particular to a stacked structure and stacking method between positive and negative electrodes in a lithium battery cell. Background technique [0002] Due to the advantages in many aspects such as capacity and discharge time, the current lithium batteries are mostly lithium-ion / lithium polymer batteries, and with the development of lithium-ion battery technology, their cost-effectiveness continues to increase, resulting in them being widely used in all walks of life. The requirements of various industries continue to promote the development of lithium batteries to large capacity. Large capacity requires lithium batteries to have a large storage volume, which leads to an increase in thickness. For a lithium battery, its basic structure is composed of cells stacked on top of each other, and battery cells are composed of overlapping pole pieces. There is an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/14H01M10/38H01M10/40
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 石峰侯桃丽
Owner EVE ENERGY CO LTD
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