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A kind of formation method of high and low temperature lithium ion battery

A lithium ion battery and a technology of a chemical formation method are applied in the field of chemical formation of high and low temperature lithium ion batteries, which can solve problems such as poor low temperature performance, and achieve the effects of improving high temperature performance, improving compatibility, and good electrical conductivity.

Active Publication Date: 2021-04-27
ZHANGZHOU HUARUI PHOTOELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Facing the current complex battery use environment, batteries are often used alternately at high temperature and low temperature, and the current additives are mostly divided into high temperature additives and low temperature additives. Lithium-ion batteries suitable for high temperature use often have poor low temperature performance, and vice versa. However, therefore, it is necessary to study a new battery that can perform well in both high temperature and low temperature environments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Put the assembled cell into the battery casing, and then inject the electrolyte, wherein the content of methylene disulfonate (MMDS) is 2.2% by volume, and the content of ethylene carbonate (VEC) is 1.8% by volume; the content of phenyl sulfone (PS) is 0.8% by volume, let stand for 2h;

[0028] 2) 0.01C constant current charging to 4.30V;

[0029] 3) Lower the battery temperature to -5°C;

[0030] 4) Charge and discharge cycle 5 times with 0.01C constant current between 4.30V and 4.10V;

[0031] 5) 0.02C discharge to 2.85V;

[0032] 6) Adjust the battery temperature to 40°C;

[0033] 7) Charge and discharge cycle 5 times with 0.01C constant current between 2.85V and 2.70V;

[0034] 8) Adjust the battery to 25°C, charge and discharge at 0.2C constant current between 4.30V and 2.70V for 3 times;

[0035] 9) Vacuumize and seal.

Embodiment 2

[0037] 1) Put the assembled cell into the battery casing, and then inject the electrolyte, wherein the content of methylene disulfonate (MMDS) is 2.4% by volume, and the content of ethylene carbonate (VEC) is 2.0% by volume; the content of phenyl sulfone (PS) is 1% by volume, let stand for 2h;

[0038] 2) 0.02C constant current charging to 4.30V;

[0039] 3) Lower the battery temperature to 5°C;

[0040] 4) Charge and discharge at a constant current of 0.02C between 4.30V and 4.15V for 5 times;

[0041] 5) 0.02C discharge to 2.95V;

[0042] 6) Adjust the battery temperature to 50°C;

[0043] 7) Charge and discharge cycle 5 times with 0.02C constant current between 2.95V and 2.70V;

[0044] 8) Adjust the battery to 25°C, charge and discharge at 0.2C constant current between 4.30V and 2.70V for 3 times;

[0045] 9) Vacuumize and seal.

Embodiment 3

[0047] 1) Put the assembled cell into the battery casing, and then inject the electrolyte, wherein the content of methylene disulfonate (MMDS) is 2.3% by volume, and the content of ethylene carbonate (VEC) is 1.9% by volume; the content of phenyl sulfone (PS) is 0.9% by volume, let stand for 2h;

[0048] 2) 0.01C constant current charging to 4.30V;

[0049] 3) Lower the battery temperature to 0°C;

[0050] 4) Charge and discharge cycle 5 times with 0.01C constant current between 4.30V and 4.10V;

[0051] 5) 0.02C discharge to 2.9V;

[0052] 6) Adjust the battery temperature to 45°C;

[0053] 7) Charge and discharge at a constant current of 0.02C between 2.9V and 2.70V for 5 times;

[0054] 8) Adjust the battery to 25°C, charge and discharge at 0.2C constant current between 4.30V and 2.70V for 3 times;

[0055] 9) Vacuumize and seal.

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PUM

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Abstract

The invention provides a method for forming a high-low temperature lithium-ion battery. The electrolyte of the lithium-ion battery contains additives, and the additives include methylene methyl disulfonate (MMDS), vinyl ethylene carbonate (VEC ) and phenylsulfone (PS) three additives, wherein the content of methylene disulfonate (MMDS) is 2.2-2.4% by volume, and the content of ethylene carbonate (VEC) is 1.8-2.0% by volume The content of phenylsulfone (PS) is 0.8-1% by volume; the formation method includes a low-temperature formation step and a high-temperature formation step, and the battery obtained through the formation method of the present invention has good high-temperature cycle performance and low-temperature cycle performance.

Description

technical field [0001] The invention relates to a method for forming a high-low temperature lithium ion battery. Background technique [0002] Facing the current complex battery use environment, batteries are often used alternately at high temperature and low temperature, and the current additives are mostly divided into high temperature additives and low temperature additives. Lithium-ion batteries suitable for high temperature use often have poor low temperature performance, and vice versa. However, therefore, it is necessary to study a new battery that can have good performance in both high temperature and low temperature environments. Contents of the invention [0003] The invention provides a method for forming a high-low temperature lithium-ion battery. The electrolyte of the lithium-ion battery contains additives, and the additives include methylene methyl disulfonate (MMDS), vinyl ethylene carbonate (VEC ) and phenylsulfone (PS) three additives, wherein the conten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M10/0525H01M10/0567H01M10/0569
CPCH01M10/0525H01M10/0567H01M10/0569H01M10/058H01M2300/0025H01M2300/004Y02E60/10Y02P70/50
Inventor 金妍
Owner ZHANGZHOU HUARUI PHOTOELECTRIC TECH
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