Method for preparing lithium battery current collector by electrostatic coating polymer composite PTC powder

An electrostatic coating and polymer technology, applied in electrode carriers/current collectors, batteries, electrode manufacturing, etc., can solve the problems of difficult process uniformity control, limited application of PTC materials, etc., to solve the problem of rapid temperature rise and chain reaction caused by combustion And explosion, improve production efficiency and good yield, accurate and convenient effect
CN103794802AInactive Publication Date: 2014-05-14ZHONGYUAN ENGINEERING COLLEGE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHONGYUAN ENGINEERING COLLEGE
Publication Date
2014-05-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing lithium battery current collector by electrostatic coating polymer composite PTC powder. The method comprises the steps of (1) preparing the polymer composite PTC powder; (2) heating the lithium battery current collector up to 100-300 DEG C by a heating device, and coating the lithium battery current collector with the polymer composite PTC powder obtained in the step (1) through an electrostatic coating device to form a polymer composite PTC powder coating on the lithium battery current collector; (3) baking the lithium battery current collector coated with the polymer composite PTC powder coating in the step (2), and carrying out a recrystallization technology to obtain the lithium battery current collector provided with the polymer composite PTC powder coating. After the method is adopted, the problems of damage and explosion caused by heating of a lithium battery can be solved, so that the problems of combustion and explosion caused by rapid heating and chain reaction since the current of the current collector is overhigh due to overheating of the interior of the lithium battery can be further solved.
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Description

Technical field

[0001] The invention relates to the field of preparation of lithium battery current collectors, in particular to a method for preparing a lithium battery current collector by electrostatically coating polymer composite PTC powder. Background technique

[0002] In the process of lithium battery application, when a short circuit such as a needle stick or a severe collision occurs inside the battery, the instantaneous current increases sharply, causing the battery to heat up, which causes a series of chain reactions, and finally causes the lithium battery to catch fire and explode. A phenomenon, some people use PTC sensors to stick to the connection circuit of the battery or the battery shell for prevention. Because these devices and components are outside the lithium battery, it is impossible to obtain the temperature rise information inside the lithium battery in time and respond in time, resulting in prevention Lag, can not meet the purpose of safety protection of...

Claims

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