Method for solving residue of internal gas and electrolyte in formation of hard-shell lithium battery

Abstract

The invention belongs to the technical field of a lithium battery, and particularly relates to a method for solving the residue of internal gas and electrolyte in the formation of a hard-shell lithium battery, which mainly solves the problems that the surplus electrolyte inside the battery cannot be discharged when the hard-shell lithium ion battery discharges the gas and the property and the service life of the battery are influenced. The technical scheme is as follows: the method for solving the residue of the internal gas and electrolyte in the formation of the hard-shell lithium battery comprises the following steps of (1) placing the hard-shell lithium battery on a battery positioning mechanism, adjusting the negative pressure P1 and the positive pressure P2 on the battery positioning mechanism, the time T1 of a vacuum controller and the time T2 of a nitrogen controller; (2) turning on a switch of the battery positioning mechanism; (3) turning on a starting switch of the battery positioning mechanism; and (4) ascending a battery pressure head, taking out the battery, and installing a battery explosion-proof valve by an operator when the pressure retention time T4 is reached. The method has the advantages of stable property and convenience in application.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a method for solving the problem of internal gas and electrolyte residue during formation of a hard-shell lithium battery. Background technique [0002] At present, large-capacity hard-shell lithium-ion batteries are mainly used in power and energy storage systems. The reason is that lithium-ion batteries have the advantages of high energy density, long life and low pollution. However, in the actual production process, it is found that the hard-shell lithium-ion battery produces more gas inside the battery after formation, and there is excess electrolyte residue, which seriously affects the performance of the battery. Now, for the method of dealing with the gas generated during the formation of hard-shell batteries, use a syringe to insert on the explosion-proof valve of the battery during the formation, and discharge the gas generated during the formation, ...

AI Technical Summary

Problems solved by technology

[0003] The invention mainly aims at the problem that the hard-shell lithium-ion battery cannot discharge excess electrolyte inside the battery when discharging gas, and the use of a syringe will communicate with the atmosphere, and moisture will enter the inside of the battery, which will affect the performance and life of the battery. The method of internal gas and electrolyte remaining when shell lithium battery is formed