A kind of anti-aging lithium-ion battery separator and manufacturing method thereof
A lithium ion battery and a manufacturing method technology are applied in the field of aging-resistant lithium ion battery separator and its manufacturing, which can solve the problems of aging of lithium ion battery separator and easy peeling off of coating layer, so as to reduce the probability of coating peeling off and reduce micro-short circuit. , The effect of preventing the coating layer from falling off
Active Publication Date: 2022-05-13
湖南博盛新能源技术有限公司
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Problems solved by technology
[0004] For this reason, the present invention provides a kind of aging-resistant lithium-ion battery diaphragm manufacturing method, in order to overcome the lithium-ion battery diaphragm multi-layer coating in the prior art, coating layer is easy to fall off, causes the problem of lithium-ion battery diaphragm aging
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[0043] In order to make the objects and advantages of the present invention clearer, the present invention will be further described below in conjunction with the examples; it should be understood that the specific examples described here are only for explaining the present invention, and are not intended to limit the present invention.
[0044] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.
[0045] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "inner", "outer" and other indicated directions or positional relationships are based on the terms shown in the accompanying drawings. The direction or positional relationship shown is ...
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The present invention relates to a method for manufacturing an aging-resistant lithium-ion battery diaphragm, and relates to the technical field of lithium-ion battery diaphragms, comprising: step S1, coating a coating material on the surface of a base film, and controlling the irradiation duration of irradiation and drying according to the thickness of the initial coating for drying , forming a primary coating film; step S2, adjusting the stretching ratio of the primary coating film according to the initial drying thickness, and stretching the primary coating film to form a primary stretching film; step S3, by detecting the light transmission of the primary stretching film rate, to determine the secondary coating or repeated stretching of the primary stretched film; step S4, correct the preset coating amount of the secondary coating, repeat steps S1 to S3, and perform the next coating on the primary stretched film Cover and stretch. In the present invention, by repeatedly coating and stretching the base film of the ion battery diaphragm, the coating material is semi-embedded in the base film, reducing the peeling off of the coating layer, slowing down the aging degree of the lithium ion battery diaphragm, and greatly improving the efficiency of the lithium ion battery. battery quality.
Description
technical field [0001] The invention relates to the technical field of lithium-ion battery separators, in particular to an aging-resistant lithium-ion battery separator and a manufacturing method thereof. Background technique [0002] In the structure of lithium batteries, the diaphragm is one of the key inner components. The performance of the diaphragm determines the interface structure, internal resistance, etc. of the battery, which directly affects the capacity, cycle and safety performance of the battery. A diaphragm with excellent performance is of great importance to improve the performance of the battery. The comprehensive performance of the separator plays an important role. The main function of the separator is to separate the positive and negative electrodes of the battery to prevent short circuit caused by contact between the two electrodes. In addition, it also has the function of allowing electrolyte ions to pass through. The separator material is non-conductiv...
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IPC IPC(8): H01M50/403H01M50/449
CPCH01M50/403H01M50/449Y02E60/10
Inventor 顾军叶淼黄科研
Owner 湖南博盛新能源技术有限公司