Method for improving uniform heat dispersion performance of lithium ion battery electrode piece

Abstract

The invention discloses a method for improving a uniform heat dispersion performance of a lithium ion battery electrode piece, relates to methods for uniform heat dispersion performances of battery electrode pieces and solves the problem that a heat-conducting performance of the plane of a conventional metal current collector adopted in a lithium ion battery is poor, so that the local overheating of an electrode in the charging and discharging processes occurs, and further battery bloating is caused and the service life of the battery is shortened in the prior art. The method has the characteristics that flexible graphite paper is used for replacing an aluminum foil and a copper foil in the lithium ion battery to be used as an electrode material active substance-loaded current collector; and heat at heat points of the electrode piece can be fast and uniformly dispersed by using the high heat-conducting performance of the flexible graphite paper, so that the heat points can be removed, the temperature of a battery cell is uniformly distributed, and further electrolyte decomposing, battery service life shortening and battery damage caused by the local overheating of the battery core can be avoided. The electrochemistry unreactiveness of the flexible graphite paper and the condition that the flexible graphite paper can not react with lithium ions and the electrolyte during over-charging and over-discharging are used, so that the service life of the battery is prolonged, and the safety of the battery is improved; and the method is used in the field of the batteries.

Description

technical field [0001] The invention relates to a method for uniform heat dissipation performance of battery pole pieces. Background technique [0002] With the thinning and bending of the electronic industry, in order to obtain energy storage elements with higher specific energy density and specific power density, people's research focus on lithium-ion batteries is not limited to the positive and negative electrode materials of the battery, electrolysis In terms of liquid and separator, the current collector as the conductive network supporting the active material has also attracted extensive attention. [0003] The current collector as the active material of lithium-ion batteries generally needs to meet: 1. It has a certain mechanical strength, light weight and thinness; 2. It is chemically and electrochemically stable in the electrolyte; 3. It has good electrical conductivity and thermal conductivity. [0004] At present, the commonly used current collectors in the organ...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problem that the current lithium-ion battery adopts the poor thermal conductivity of the plane of the traditional metal current collector, which leads to local overheating of the electrodes during the charging and discharging process, resulting in battery flatulence and reduced service life, and provides a method for improving the uniform heat dissipation of lithium-ion battery pole pieces. method of performance

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