Lithium ion battery pole piece structure

Abstract

The invention provides a lithium ion battery pole piece structure. The structure comprises a positive pole piece and a negative pole piece, the negative pole piece comprises a negative pole piece inactive part and a negative pole piece active part which are located on the same substrate, and the negative pole piece inactive part is fixedly connected with a negative pole piece tab; the positive plate comprises positive plate inactive parts and positive plate active parts which are positioned on the same substrate, the at least two positive plate inactive parts are separated by the positive plate active parts, and the positive plate first tab and the positive plate second tab are fixedly connected with different positive plate inactive parts respectively; and when the positive plate and the negative plate are arranged in the battery cell, the positive plate first tab and the negative plate tab are arranged at the same end of the battery cell, and the positive plate first tab and the positive plate second tab are arranged at different ends of the battery cell. According to the invention, the high-temperature performance of the battery can be improved, the method is suitable for batteries of systems such as a lithium cobalt oxide system, a ternary system, a lithium manganate system and the like, and the use environment of the battery can be improved by 5-15 DEG C by using the scheme.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, relates to the temperature control of lithium batteries, and in particular to a pole piece structure of lithium ion batteries. Background technique [0002] Ternary material system batteries are prone to gas generation under high voltage or high temperature conditions, which may cause battery failure. There are two main reasons for the temperature rise inside the battery, one is the temperature of the external environment, and the other is the heat generated inside the battery. In order to reduce the temperature of the battery and improve the battery life, the document CN111509285A discloses a battery and a method for making the battery. The battery includes a casing, a battery cell and at least one hollow tube. At least one hollow tube runs through the cell and the shell of the battery, and is sealed and connected with the shell of the battery. At least one hollow tube is arranged ne...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem in the prior art that the heat generated inside the battery is difficult to derive, the present invention provides a lithium-ion battery pole piece structure

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