Soft package power lithium ion battery cathode pole ear structure and preparation method

Abstract

The invention discloses a soft package power lithium ion battery cathode pole ear structure and a preparation method, a pole ear base material is a copper strip with copper content of more than 99.99%; the pole ear is locally coated, and a pole ear glue with a multilayer structure is coated on an uncoated part of the pole ear. The prepared cathode pole ear can avoid the hidden trouble that a chronic corrosion leakage liquid is generated at a bimetallic composite position, the yield and consistency of cell production can be further enhanced, and the usage life of the cell can be simultaneously increased. The preparation method of the invention enables convenient operation, can realize large-scale production, and has the advantages of environmental protection and strong feasibility.

Description

technical field

[0001] The invention relates to the technical field of lithium-ion battery production, in particular to a negative electrode tab structure for a soft pack power lithium-ion secondary battery and a preparation method thereof. Background technique

[0002] In recent years, due to the pressure of environmental pollution and energy shortage, countries are forced to find new green, environmentally friendly and sustainable energy sources. The green, high-energy and environmentally friendly lithium-ion battery that appeared in the 1990s has become one of the most eye-catching power sources due to its high energy density, long cycle life, and high operating voltage. As one of the core materials of the power battery, the tab has an important impact on the battery life, internal resistance and other characteristics. The tab with excellent performance plays an important role in improving the comprehensive performance of the power battery life.

[0003] Since the negati...

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