Liquid filling method for flexible package lithium ion battery

Abstract

The invention relates to a liquid filling method for a flexible package lithium ion battery. The liquid filling method comprises the following steps of: conveying the flexible package lithium ion battery and a battery clamp to liquid filling stations for positioning, pressing a liquid filling vacuum chamber downwards, and sealing the liquid filling vacuum chamber with the battery clamp; performing vacuumizing on the liquid filling vacuum chamber, a liquid filling cup, and a vacuum buffering tank communicated with the liquid filling cup simultaneously; after finishing the vacuumizing of the liquid filling cup, the vacuum buffering tank and the liquid filling vacuum chamber, switching on a mouth valve of the liquid filling cup to enable electrolyte in the liquid filling cup to flow out, so as to finish the liquid filling; and performing vacuum breaking on the liquid filling vacuum chamber, the liquid filling cup and the vacuum buffering tank, lifting the liquid filling vacuum chamber, and transferring the battery clamp and the flexible package lithium ion battery. According to the method, the vacuum buffering tank is additionally arranged, so that the stability when the electrolyte is filled in the battery during the liquid filling of the flexible package lithium ion battery is enhanced, and the liquid filling efficiency of the battery can be improved.

Description

technical field [0001] The invention relates to a method for maintaining stable and rapid vacuum liquid injection of a lithium ion battery, in particular to a liquid injection method for a lithium ion battery in a soft package. Background technique [0002] The high energy density, long cycle life and environmental protection characteristics of lithium-ion batteries make it more and more widely used, and the thin sheet of lithium-ion battery body in flexible packaging and the characteristics of easy control of shape make it used in more and more fields , especially in consumer electronics. How to quickly manufacture high-quality flexible-packaged lithium-ion batteries has become an urgent need. The liquid injection process of commonly used flexible-packaged lithium-ion batteries mainly consists of normal liquid injection→standstill→sealing→normal standstill→the next process. The time spent in normal standing is more than 10-24. In order to shorten the time of normal standin...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a vacuum liquid injection method that keeps the flow rate stable and fast when injecting liquid, so as to solve the problems of low injection efficiency and injection accuracy in the current liquid injection method

Images