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Method for overcomingwrinkles of lithium battery diaphragm

A lithium battery diaphragm and wrinkle technology, which is applied in the battery field, can solve problems such as dry-process diaphragm wrinkles, achieve the effects of improving quality, improving dry-process diaphragm wrinkles, and improving safety performance

Inactive Publication Date: 2020-09-22
昆山聚创新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, an object of the present invention is to propose a method for improving the wrinkles of the lithium battery diaphragm, which can significantly improve the problem of the dry process diaphragm wrinkles inside the lithium battery, thereby improving the quality of the lithium battery and improving the safety performance of the lithium battery

Method used

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  • Method for overcomingwrinkles of lithium battery diaphragm
  • Method for overcomingwrinkles of lithium battery diaphragm
  • Method for overcomingwrinkles of lithium battery diaphragm

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Embodiment Construction

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0027] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the ...

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Abstract

The invention discloses a method for overcoming wrinkles of a lithium battery diaphragm. The method comprises the following steps: (1) laminating a positive plate, a negative plate and a diaphragm, and then carrying out tab welding, packaging and baking to obtain a battery cell; (2) putting the battery cell into a vacuum cavity, clamping the battery cell by using a first clamp, applying a predetermined pressure to the battery cell, then injecting an electrolyte into the battery cell in a vacuum environment, and carrying out vacuum packaging on the battery cell after liquid injection; (3) pressurizing and standing the battery cell obtained in the step (2) by adopting a second clamp; and (4) carrying out formation on the battery cell obtained in the step (3). The method can significantly overcomethe problem of wrinkles of the dry-method diaphragm in the lithium battery, thereby improving the quality of the lithium battery and improving the safety performance of the lithium battery.

Description

technical field [0001] The invention belongs to the field of batteries, and in particular relates to a method for improving the wrinkles of lithium battery separators. Background technique [0002] In the structure of lithium batteries, the separator is one of the key inner components. Lithium battery series, since the electrolyte is an organic solvent system, a separator material that is resistant to organic solvents is required, and a high-strength thin-film polyolefin porous membrane is generally used. In the battery production process, the separator is used in the lamination process. The process includes: positive electrode sheet - lamination - welding - glue sticking - packaging - baking - liquid injection - standing - formation - degas - capacity separation - self-discharge test And other processes, in which the diaphragm will swell slightly after being soaked in the electrolyte during the liquid injection and standing processes, and the stress will be distributed twi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0585H01M10/052
CPCH01M10/052H01M10/0585Y02E60/10Y02P70/50
Inventor 张明杰李奎谢世平
Owner 昆山聚创新能源科技有限公司