Lithium ion battery liquid injection control valve

Abstract

The invention provides a liquid injection control valve of a lithium ion battery, relates to the field of liquid injection equipment of the lithium ion battery, and solves the problems that an existing liquid injection valve of the lithium ion battery is not resistant to electrolyte and short in service life, and a passage is easily blocked due to crystallization. The valve comprises a valve body, a liquid inlet channel and a liquid outlet channel are formed in the valve body, a valve element cavity communicated with the liquid inlet channel and the liquid outlet channel is formed in the valve body, a valve element assembly used for controlling the liquid inlet channel and the liquid outlet channel to be connected and disconnected is arranged in the valve element cavity, and the valve element assembly comprises an upper ceramic rotating piece and a lower ceramic fixing piece which are matched up and down; the lower ceramic fixing piece is fixed to a liquid inlet of the liquid outlet channel, at least one liquid outlet hole penetrating through the upper end face and the lower end face is evenly formed in the lower ceramic fixing piece, liquid inlet groove holes used for being matched with the liquid outlet holes are formed in the upper ceramic rotating piece, and the rotating shaft is in transmission connection with a driving device used for driving the rotating shaft to rotate. The invention has the advantages of electrolyte resistance, long service life and low probability of crystallization in channels.

Description

technical field [0001] The invention relates to the field of liquid injection equipment for lithium ion batteries, in particular to a liquid injection control valve for lithium ion batteries. Background technique [0002] In the manufacturing process of existing lithium-ion batteries, in the liquid injection process, it is first necessary to vacuumize the battery cell first, and then inject the electrolyte. The traditional liquid injection method adopts the "cup-in-rod" structural liquid injection method, that is, there is a movable rod in the hollow of the liquid injection cup, the top of the movable rod is provided with a sealing plug structure, and the tail is provided with a movable sealing structure. To control the movement of the movable rod, when injecting liquid, firstly, the liquid injection cup is sealed with the outer ring of the liquid injection port of the battery, and then the cylinder drives the movable rod to move upward, and the inner cavity of the battery c...

AI Technical Summary

Problems solved by technology

[0009] The invention proposes a lithium-ion battery injection control valve, which solves the defects in the prior art that the lithium-ion battery injection valve is not resistant to electrolyte, has a low lifespan, and the channel is easily blocked due to the formation of crystals.

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