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Formation technology of flexible package lithium ion battery

A lithium-ion battery and flexible packaging technology, applied in the field of the formation process of flexible-packaged lithium-ion batteries, can solve the problems of electrolyte gushing, shortening battery cycle life, difficult to control gas production speed, etc., so as to reduce oxygen partial pressure and avoid battery expansion. Deformation and prevention of flatulence and deformation

Active Publication Date: 2018-11-13
JIANGXI DIBIKE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the formation process of flexible packaging lithium-ion batteries, in order to discharge the gas generated during the formation, the opening formation is generally used. In the opening formation, because the gas production rate is difficult to control, the electrolyte will follow the gas from the liquid injection during the formation process. hole gush
At the same time, the battery formed by opening is easily affected by oxygen in the atmosphere, which shortens the cycle life of the battery

Method used

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  • Formation technology of flexible package lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1) Place the soft-packaged lithium-ion battery to be injected between two hot platens, heat the battery, and heat the battery to 45°C;

[0049] 2), maintaining the temperature of the battery, injecting part of the electrolyte into the battery, the amount of the part of the electrolyte being 60% of the total amount of the electrolyte;

[0050] 3), put the battery into a glove box, feed protective gas, adjust the oxygen content in the glove box to 80ppm, take out the lithium ion battery after sealing, the protective gas is nitrogen and Mixed gas of carbon dioxide, the content of carbon dioxide is 5%;

[0051] 4) Place the battery between two hot pressing plates, apply pressure to the battery, the pressure is 0.1MPa, after the temperature of the battery drops to normal temperature, charge it with a constant current of 0.02C, charging the battery to a first set voltage, where the first set voltage is 2.9V;

[0052]5) Charge the battery with a constant current of 0.05C to ...

Embodiment 2

[0061] 1) Place the soft-packaged lithium-ion battery to be injected between two hot platens, heat the battery, and heat the battery to 60°C;

[0062] 2), maintaining the temperature of the battery, injecting part of the electrolyte into the battery, the amount of the part of the electrolyte being 80% of the total amount of the electrolyte;

[0063] 3), put the battery into a glove box, feed protective gas, adjust the oxygen content in the glove box to 80ppm, take out the lithium ion battery after sealing, the protective gas is nitrogen and Mixed gas of carbon dioxide, the content of carbon dioxide is 30%;

[0064] 4) Place the battery between two hot pressing plates, apply pressure to the battery, the pressure is 0.2MPa, after the temperature of the battery drops to normal temperature, charge it with a constant current of 0.05C, charging the battery to a first set voltage, where the first set voltage is 3.0V;

[0065] 5) Charge the battery with a constant current of 0.1C to...

Embodiment 3

[0074] 1) Place the soft-packaged lithium-ion battery to be injected between two hot platens, heat the battery, and heat the battery to 50°C;

[0075] 2), maintaining the temperature of the battery, injecting part of the electrolyte into the battery, the amount of the part of the electrolyte being 70% of the total amount of the electrolyte;

[0076] 3), put the battery into a glove box, feed protective gas, adjust the oxygen content in the glove box to 80ppm, take out the lithium ion battery after sealing, the protective gas is nitrogen and Mixed gas of carbon dioxide, the content of carbon dioxide is 10%;

[0077] 4) Place the battery between two hot pressing plates, apply pressure to the battery, the pressure is 0.2MPa, after the temperature of the battery drops to normal temperature, charge it with a constant current of 0.03C, charging the battery to a first set voltage, where the first set voltage is 2.9V;

[0078] 5) Charge the battery with a constant current of 0.05C t...

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Abstract

The invention provides a formation technology of a flexible package lithium ion battery. The formation technology comprises the following steps: heating and pressing the lithium ion battery in the formation process, and controlling the atmosphere to form current and voltage, so that a compact SEI film is formed on the electrode surface of the flexible package lithium ion battery, the cycle life ofthe battery is prolonged, and the capacity retentivity of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of soft-packaged lithium-ion batteries, in particular to a formation process for soft-packaged lithium-ion batteries. Background technique [0002] In order to discharge the gas generated during the formation process of flexible packaging lithium-ion batteries, opening formation is generally used. In opening formation, because the gas production rate is difficult to control, the electrolyte will follow the gas from the liquid injection during the formation process. The hole gushes out. At the same time, the battery formed by opening is easily affected by oxygen in the atmosphere, which shortens the cycle life of the battery. At the same time, the formation process is the process of forming the SEI film. Therefore, the atmosphere, current, voltage, temperature, pressure and other factors in the formation will affect the performance of the battery. Contents of the invention [0003] The invention provides ...

Claims

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Application Information

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IPC IPC(8): H01M10/44H01M10/0525
CPCH01M10/0525H01M10/446Y02E60/10
Inventor 袁永华
Owner JIANGXI DIBIKE
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