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Method for measuring mass of free electrolyte in lithium ion battery

A technology of lithium ion battery and measurement method, applied in the field of lithium ion battery manufacturing, can solve problems such as increase of electrolyte solution and hidden danger of battery safety, and achieve the effects of reducing waste, saving manufacturing cost and accurate measurement result.

Active Publication Date: 2021-04-16
浙江锂威能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the liquid injection volume increases, the free electrolyte may also increase, which also brings a series of safety hazards to the battery.

Method used

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  • Method for measuring mass of free electrolyte in lithium ion battery
  • Method for measuring mass of free electrolyte in lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A method for measuring the quality of free electrolyte in a lithium ion battery, comprising the following steps:

[0028] 1), weigh the total mass M of the lithium-ion battery 总 ;

[0029] 2) Disassemble the lithium-ion battery, wipe off the electrolyte on the outer surface of the battery cell and the inner and outer surfaces of the packaging case, and weigh the total mass M of the dried battery cell and the packaging case. 干 ;

[0030] 3), calculate the mass m of the free state electrolyte in the lithium-ion battery, m=M 总 -M 干 .

[0031] Preferably, the lithium-ion battery is a soft-packed lithium-ion battery, an aluminum shell battery or a steel shell battery with the air bag removed. The packaging shell is aluminum plastic film, aluminum shell or steel shell.

[0032] Preferably, an electronic balance is used for weighing, and the electronic balance is first balanced and zeroed before use.

[0033] Preferably, the weighing accuracy of the electronic balance i...

Embodiment 2

[0035] A method for measuring the quality of free electrolyte in a lithium ion battery, comprising the following steps:

[0036] 1), weigh the total mass M of the lithium-ion battery 总 ;

[0037] 2), cut off the air bag along the two edges of the lithium-ion battery, and weigh the quality M of the air bag respectively 气袋 and the mass of the battery body M 主体 ;

[0038] 3) Wipe off the residual electrolyte inside and outside the air bag, and weigh the mass M of the air bag after drying. 干气袋 ;

[0039] 4) Disassemble the main body of the battery, wipe off the electrolyte on the outer surface of the battery cell and the inner and outer surfaces of the packaging case, and weigh the total mass M of the dried battery cell and the packaging case 干主体 ;

[0040] 5), respectively calculate the mass m of the free electrolyte in the air bag 1 , the mass of free electrolyte in the battery body m 2 and the total mass m of the free electrolyte in the lithium-ion battery, where m 1 =...

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Abstract

The invention belongs to the field of lithium ion batteries, and particularly relates to a method for measuring the mass of a free-state electrolyte in a lithium ion battery, which comprises the following steps: weighing the total mass of the lithium ion battery; disassembling the lithium ion battery, wiping the electrolyte on the outer surface of the battery cell and the inner and outer surfaces of the packaging shell, and weighing the total mass of the wiped battery cell and the packaging shell; calculating the mass of the free-state electrolyte in the lithium ion battery; or the method comprises the following steps: weighing the total mass of the lithium ion battery; cutting off the air bag along the two sealing edges of the lithium ion battery; wiping residual electrolyte inside and outside the air bag, and weighing the mass of the wiped air bag; disassembling the battery main body, wiping the electrolyte on the outer surface of the battery cell and the inner and outer surfaces of the packaging shell, and weighing the total mass of the wiped battery cell and the packaging shell; and calculating the total mass of the free electrolyte in the lithium ion battery. Compared with the prior art, the method is convenient for measurement and calculation and accurate and reliable in measurement result.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery manufacturing, and in particular relates to a method for measuring the quality of a free electrolyte in a lithium-ion battery. Background technique [0002] With the development of lithium battery science and technology and the continuous improvement of the public's material and cultural living standards, countries are gradually demanding a small, light, high-energy, reliable, safe, pollution-free, and reusable clean energy -- lithium-ion batteries. getting bigger. At the same time, people's requirements for the electrical performance of lithium-ion batteries are getting higher and higher, so there is an urgent need to improve the cycle performance of high-energy density and large-capacity lithium-ion batteries, which requires more electrolyte to be injected into the battery. [0003] The electrolyte, as the intermediary of lithium ion transmission in lithium ion batteries, is the bri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01G17/04
CPCY02E60/10
Inventor 杨山山谢安河赵云龙黄起省陈杰杨山李载波
Owner 浙江锂威能源科技有限公司
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