Liquid injection head of polymer battery electrolyte

Abstract

The invention discloses a liquid injection head of a polymer battery electrolyte. The liquid injection head comprises an upper cover and a main body, wherein the upper cover is made of polyethylene or polypropylene; a first hollow cavity is arranged in the upper cover; an inner thread is arranged in the surface of the first hollow cavity; a gas pressure pipe and a liquid injection pipe communicating with the first hollow cavity separately are fixedly arranged on the upper surface of the upper cover; an outer thread matched with the inner thread is arranged in the side surface of the upper part of the main body and a second hollow cavity is arranged in the main body; an electrolyte filter net is arranged in the second hollow cavity; filter paper covers the surface of the electrolyte filter net; a liquid outlet pipe communicating with the second hollow cavity is arranged on the lower surface of the main body; a guard cover is arranged on the surface of the tail end of the liquid outlet pipe; and a plurality of discharge through holes are arranged in the guard cover. The liquid injection head is reasonable in structure and convenient to use; the condition that the electrolyte is not affected by external dust in a liquid injection process is ensured; the electrolyte filter net and the filter paper can filter out tiny dust existing in the electrolyte in the liquid injection process; and the use requirements of liquid injection of the electrolyte are met.

Description

technical field [0001] The invention relates to the technical field of polymer lithium-ion battery production equipment, in particular to a liquid injection head for polymer battery electrolyte. Background technique [0002] During the production and processing of polymer lithium-ion batteries, the perfusion of electrolyte is carried out in a closed and dry environment, and it takes a long time to soak in the electrolyte to ensure good contact between the battery cell and the electrolyte. The current electrolyte injection head generally chooses the direct injection method, because the electrolyte itself is easy to produce fine dust inside the electrolyte due to the production environment, and secondly, in the injection process, the injection environment may cause the electrolyte to be exposed to dry air. Cause the dust in the air to enter the electrolyte again, causing secondary pollution. In addition, since the electrolyte soaks the cell for a long time, the aluminum-plast...

AI Technical Summary

Problems solved by technology

The current electrolyte injection head generally chooses the direct injection method. Because the environment of the electrolyte itself is easy to cause fine dust inside the electrolyte, and secondly in the injection process, the injection environment may cause the electrolyte to be exposed to dry air. Cause the dust in the air to enter the electrolyte again, causing secondary pollution

In addition, because the electrolyte soaks the battery cell for a long time, the aluminum-plastic film encapsulating the electrolyte and the electrolyte will be in contact for too long, which will affect the battery packaging effect.

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