Liquid injection device and method of lithium ion battery

A technology of lithium ion battery and liquid injection device, which is applied to secondary batteries, battery pack parts, circuits, etc., can solve the problems of affecting production efficiency, prolonged liquid injection time, slow liquid absorption of pole pieces, etc., so as to improve efficiency , The effect of increasing the wetting speed and reducing the viscosity
CN110021733APending Publication Date: 2019-07-16东莞天予天正新能源科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
东莞天予天正新能源科技有限公司
Publication Date
2019-07-16

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Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a liquid injection device of a lithium ion battery. The liquid injection device comprises a liquid storage tank, a liquid injection pipe and a fixture, wherein the liquid storage tank communicates with the liquid injection pipe, the liquid injection pipe is arranged on the fixture, the liquid storagetank comprises an outer tank wall layer and an inner tank wall layer, a closed first cavity is formed between the outer tank wall layer and the inner tank wall layer, and a first heating body is arranged in the first cavity. By the first heating body, the liquid storage tank and an electrolyte can be heated, the viscosity of the electrolyte is reduced, and the liquid injection efficiency and theimmersion efficiency of a battery cell are improved; and moreover, the heating stability and consistency of the liquid storage tank also can be improved, and influence on uniform heating of the liquidstorage tank and the electrolyte due to overheat is prevented. Moreover, the invention also discloses a liquid injection method of the lithium ion battery.
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Description

technical field

[0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a liquid injection device and method for lithium ion batteries. Background technique

[0002] Lithium-ion battery is a kind of green energy with the advantages of high working voltage, high energy density, long cycle life, and no memory effect. It has been widely used in various industries, especially in recent years, electric vehicles have been greatly developed. The internal demand for power and energy storage lithium-ion batteries has grown significantly, and with the maturity of lithium-ion battery technology, people have put forward higher requirements for the performance of lithium-ion batteries.

[0003] At present, in order to increase the energy density of lithium-ion batteries, the cathode and anode sheets of the battery are usually rolled more tightly so that more materials can be accommodated inside the battery. When liquid is used, there ar...

Claims

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