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Electrolyte wetting method and formation method for flexibly-packaged lithium ion battery

A lithium-ion battery, ion battery technology, applied in non-aqueous electrolyte battery, electrolyte battery manufacturing, sustainable manufacturing/processing and other directions, can solve the problem of long shelving time, improve the infiltration effect, promote the electrode interface reaction, improve the cycle performance effect

Active Publication Date: 2017-06-20
DO FLUORIDE NEW ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an efficient electrolyte infiltration method for soft-pack lithium-ion batteries, which can solve the problem in the prior art that the electrolyte soaks soft-pack lithium-ion batteries for a long time.

Method used

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  • Electrolyte wetting method and formation method for flexibly-packaged lithium ion battery
  • Electrolyte wetting method and formation method for flexibly-packaged lithium ion battery
  • Electrolyte wetting method and formation method for flexibly-packaged lithium ion battery

Examples

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Effect test

Embodiment 1

[0032] The electrolyte infiltration method of the soft-packed lithium-ion battery of this embodiment includes filling the soft-packed lithium-ion battery with an airbag with electrolyte according to the designed amount, vacuumizing the opening of the soft-packed lithium-ion battery, then packaging, and then heating the soft-packed lithium-ion battery at 0°C. Stand in vacuum for 20h.

[0033] The formation method of the soft pack lithium-ion battery of the present embodiment comprises the following steps:

[0034] 1) Charge the above-mentioned soft pack lithium-ion battery after standing in vacuum to 4.2V at a constant current at 0.2C and then charge at a constant voltage to 0.05C;

[0035] 2) Puncture the airbag of the soft-pack lithium-ion battery charged in step 1), and pump air.

[0036] After the soft pack lithium-ion battery of this embodiment is manufactured, the negative electrode interface is disassembled at full charge as shown in figure 1 As shown, it can be seen t...

Embodiment 2

[0038] The electrolyte infiltration method of the soft-pack lithium-ion battery of this embodiment includes filling the soft-pack lithium-ion battery with an airbag with electrolyte according to the designed amount, vacuumizing the opening of the soft-pack lithium-ion battery for 0.02h, then packaging, and then Stand in vacuum at 25°C for 12h.

[0039] The formation method of the soft pack lithium-ion battery of the present embodiment comprises the following steps:

[0040] 1) Charge the above-mentioned soft pack lithium-ion battery after standing in vacuum to 4.2V at a constant current at 0.2C and then charge at a constant voltage to 0.05C;

[0041] 2) Puncture the airbag of the soft-pack lithium-ion battery charged in step 1), and pump air.

[0042] After the production of the soft-pack lithium-ion battery of this embodiment is completed, the negative electrode interface is disassembled at full charge, as shown in figure 2 As shown, it can be seen that the negative electr...

Embodiment 3

[0044] The electrolyte infiltration method of the soft-pack lithium-ion battery of this embodiment includes filling the soft-pack lithium-ion battery with an airbag with electrolyte according to the designed amount, vacuumizing the opening of the soft-pack lithium-ion battery for 0.02h, then packaging, and then Stand in vacuum at 40°C for 8h.

[0045] The formation method of the soft pack lithium-ion battery of the present embodiment comprises the following steps:

[0046] 1) Charge the above-mentioned soft pack lithium-ion battery after standing in vacuum to 4.2V at a constant current at 0.2C and then charge at a constant voltage to 0.05C;

[0047] 2) Puncture the airbag of the soft-pack lithium-ion battery charged in step 1), and pump air.

[0048] After the soft pack lithium-ion battery of this embodiment is manufactured, the negative electrode interface is disassembled at full charge as shown in image 3 As shown, it can be seen that the negative electrode interface is f...

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Abstract

The invention relates to an electrolyte wetting method and a formation method for a flexibly-packaged lithium ion battery, and belongs to the technical field of manufacturing of the lithium ion battery. The electrolyte wetting method for the flexibly-packaged lithium ion battery comprises the steps of packaging the flexibly-packaged lithium ion battery and then performing vacuum standing at a temperature of 0-100 DEG C. According to the electrolyte wetting method for the flexibly-packaged lithium ion battery disclosed by the invention, the step of vacuum standing can be flexibly carried out at any time frames and processes after packaging; in addition, by virtue of vacuum standing, the standing time after packaging can be greatly shortened while production efficiency can be greatly improved; in addition, by adoption of the electrolyte wetting method for the flexibly-packaged lithium ion battery, the wetting effect can be enhanced, an electrode interface reaction of the flexibly-packaged lithium ion battery can be promoted, and the cycling performance of the lithium ion battery is improved.

Description

technical field [0001] The invention relates to an electrolyte infiltration method for a soft-pack lithium-ion battery and a method for forming a soft-pack lithium-ion battery, belonging to the technical field of lithium-ion battery manufacturing. Background technique [0002] After the lithium-ion battery is injected, the electrolyte needs to gradually penetrate into the electrodes and separators. After the injection, it is necessary to complete the infiltration process of the lithium-ion battery. At present, the infiltration process of lithium-ion batteries is a time-consuming process, generally 8 to 60 hours. There are mainly three ways to achieve electrolyte penetration in the infiltration process: 1) The lithium-ion battery after liquid injection is not sealed, and it is infiltrated in a negative pressure environment; 2) The lithium-ion battery is encapsulated by liquid injection or After welding and sealing, put it on hold at normal temperature and pressure, and the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCH01M10/058Y02E60/10Y02P70/50
Inventor 许飞刘兴福赵永锋张向举杨清华韩广欣李梦龙卢鹏翔邵源峰李伟杰
Owner DO FLUORIDE NEW ENERGY TECHNOLOGY CO LTD