Liquid injecting device and liquid injecting method

Abstract

The invention belongs to the technique field of lithium ion battery production equipment, and especially relates to a liquid injecting device. The liquid injecting device comprises liquid injecting cup cavities, an upper fixing plate, a lower fixing plate, liquid injecting nozzles, liquid injecting openings, first blocking rods, second blocking rods, a first drive assembly and a second drive assembly; the upper end faces and lower end faces of the liquid injecting cup cavities are in close contact with the upper fixing plate and the lower fixing plate; the liquid injecting openings are formed in the upper fixing plate and communicate with the liquid injecting cup cavities; the liquid injecting nozzles are located under the lower fixing plate and communicate with the liquid injecting cup cavities; a through hole communicated with the liquid injecting cup cavities is formed in the upper fixing plate; an air tap is connected to the end of the through hole. According to the invention, the liquid injecting principle of the existing liquid injecting device of lithium ion batteries is improved, and existing single liquid injection is changed into reciprocating small-amplitude repeated liquid injection so as to prevent residual air bubbles at dead angles in the battery core, therefore the qualified rate of the liquid injection process of the battery cores is greatly improved and quality of the battery cores in the liquid injection process is improved without influencing the overall productivity.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery production equipment, and in particular relates to a liquid injection device and a liquid injection method. Background technique [0002] In the lithium-ion battery manufacturing industry, it is necessary to inject liquid into the battery cells so that the cells can fully contact and absorb the electrolyte before the next step of packaging can be performed. However, a small amount of air bubbles will be generated during the liquid injection process, and the residual air bubbles will seriously affect the quality of the battery itself and the safety of the subsequent process. [0003] In the existing liquid injection process of lithium-ion batteries, after the electrolyte is injected into the battery cell from the liquid injection cup, the residual liquid is vacuum-extracted at one time, and then directly enters the next process. Because the liquid injection system of the existing lithi...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a liquid injection device for the deficiencies of the prior art to solve the problem of residual bubbles in the liquid injection of the lithium-ion battery cell during the liquid injection process, thereby improving the battery life to a large extent. Product quality at core injection stage

Images