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

Pending Publication Date: 2019-07-16
东莞天予天正新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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 the liquid is used, the problem of slow liquid absorption and insufficient liquid absorption of the pole piece, at the same time, the liquid injection time is relatively prolonged, which seriously affects the production efficiency

Method used

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  • Liquid injection device and method of lithium ion battery
  • Liquid injection device and method of lithium ion battery
  • Liquid injection device and method of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as Figure 1~3 As shown, a liquid injection device for a lithium ion battery includes a liquid storage tank 1, a liquid injection pipe 2 and a clamp 3, the liquid storage tank 1 communicates with the liquid injection pipe 2, the liquid injection pipe 2 is arranged above the clamp 3, and the liquid storage tank 1 includes an outer tank wall layer 11 and an inner tank wall layer 12, a closed first cavity is formed between the outer tank wall layer 11 and the inner tank wall layer 12, and a first heating element 13 is provided in the first cavity.

[0034] In the actual operation of the present invention, the liquid storage tank 1 is heated by energizing the first heating element 13, the temperature of the liquid storage tank 1 rises, and the heat heats the electrolyte in the liquid storage tank 1 through the action of heat conduction, and electrolysis As the temperature of the liquid increases, its viscosity will also decrease, and its fluidity will become better, so...

Embodiment 2

[0041] Such as Figure 1~3 Shown, a kind of lithium ion battery filling method comprises the following steps:

[0042] Step 1) heating the battery cell, heating the battery cell to 10°C, and then loading the battery cell into the holding tank 32 of the fixture 3;

[0043] Step 2) Heating the electrolyte, using the first heating element 13 in the liquid storage tank 1 to heat the electrolyte stored in the liquid storage tank 1 by 10°C, and maintaining a constant temperature;

[0044] Step 3) Heat the liquid injection pipe 2, use the second heating element 23 in the liquid injection pipe 2 to heat the liquid injection pipe 2 by 10°C, and keep the temperature constant;

[0045] Step 4) Inject liquid, press down the liquid injection nozzle of the liquid injection pipe 2 to seal the liquid injection nozzle and the liquid injection port of the battery cell, and then inject the electrolyte in the liquid storage tank 1 into the battery core;

[0046] Above step 1), step 2) and step ...

Embodiment 3

[0048] A liquid injection method for a lithium ion battery, comprising the following steps:

[0049] Step 1) heating the electric core, heating the electric core to 30°C, and then loading the electric core into the holding tank 32 of the fixture 3;

[0050] Step 2) heating the electrolyte, using the first heating element 13 in the liquid storage tank 1 to heat the electrolyte stored in the liquid storage tank 1 to 30°C, and keeping the constant temperature;

[0051] Step 3) Heat the liquid injection pipe 2, use the second heating element 23 in the liquid injection pipe 2 to heat the liquid injection pipe 2 to 30°C, and keep the temperature constant;

[0052] Step 4) Inject liquid, press down the liquid injection nozzle of the liquid injection pipe 2 to seal the liquid injection nozzle and the liquid injection port of the battery cell, and then inject the electrolyte in the liquid storage tank 1 into the battery core;

[0053] Above step 1), step 2) and step 3) are carried out...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/36H01M10/0525H01M50/609
CPCH01M10/0525H01M50/60Y02E60/10
Inventor 叶帅
Owner 东莞天予天正新能源科技有限公司
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