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Formation method of lithium battery

A chemical formation method and lithium battery technology, which are applied in the manufacture of secondary batteries, electrochemical generators, and electrolyte storage batteries, can solve problems such as large loss of electrolyte, and achieve excellent chemical formation effects.

Active Publication Date: 2021-10-26
信义电源(苏州)有限公司
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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 a lithium battery formation method, aiming to solve the technical problem of large loss of electrolyte in the lithium ion battery formation process in the prior art

Method used

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  • Formation method of lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] S10: The first charging stage: set the negative pressure at the opening of the lithium battery to -30Kpa and apply 0.2 Mpa to the shell of the lithium battery, and then charge the lithium battery at a charging rate of 0.1C for 7 minutes;

[0049] S20: The second charging stage: set the negative pressure at the opening of the lithium battery to -50Kpa and apply 0.4 Mpa to the shell of the lithium battery, and then charge the lithium battery at a charging rate of 0.26C for 80 minutes;

[0050] S30: The third charging stage: set the negative pressure at the opening of the lithium battery to -20Kpa and apply 0.2 Mpa to the casing of the lithium battery, and then charge the lithium battery at a charging rate of 0.26C for 50 minutes.

Embodiment 2

[0052] S10: The first charging stage: set the negative pressure at the opening of the lithium battery to -20Kpa and apply 0.1 Mpa to the shell of the lithium battery, and then charge the lithium battery at a charging rate of 0.1C for 7 minutes;

[0053] S20: The second charging stage: set the negative pressure at the opening of the lithium battery to -40Kpa and apply 0.3 Mpa to the shell of the lithium battery, and then charge the lithium battery at a charging rate of 0.26C for 80 minutes;

[0054] S30: The third charging stage: set the negative pressure at the opening of the lithium battery to -30Kpa and apply 0.1Mpa to the casing of the lithium battery, and then charge the lithium battery at a charging rate of 0.26C for 50 minutes.

Embodiment 3

[0056] S10: The first charging stage: set the negative pressure at the opening of the lithium battery to -30Kpa and apply 0.2Mpa to the shell of the lithium battery, and then charge the lithium battery at a charging rate of 0.1C for 7 minutes;

[0057] S20: The second charging stage: set the negative pressure at the opening of the lithium battery to -30Kpa and apply 0.2 Mpa to the casing of the lithium battery, and then charge the lithium battery at a charging rate of 0.26C for 80 minutes;

[0058] S30: The third charging stage: set the negative pressure at the opening of the lithium battery to -30Kpa and apply 0.1Mpa to the casing of the lithium battery, and then charge the lithium battery at a charging rate of 0.26C for 50 minutes.

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Abstract

The invention belongs to the technical field of battery production, and in particular relates to a method for forming a lithium battery. The method for forming a lithium battery includes the following steps: first charging stage: the negative pressure at the opening of the lithium battery is set to -10Kpa to -30Kpa and the negative pressure on the lithium battery is Under the first extrusion force applied to the shell, the lithium battery is charged at the first charging rate, and the charging time is the first preset time; the second charging stage: the negative pressure at the opening of the lithium battery is set to -30Kpa ~ -50Kpa And under the second extrusion force applied to the shell of the lithium battery, the lithium battery is charged at the second charging rate, and the charging time is the second preset time; the third charging stage: the negative pressure at the opening of the lithium battery is set to - 10Kpa~-30Kpa and the third pressing force is applied to the shell of the lithium battery, and the lithium battery is charged at the third charging rate, and the charging time is the third preset time. Through the cooperation of the negative pressure in each charging stage and the corresponding extrusion force, the problem of the electrolyte being sucked away due to excessive pressure at the opening of the lithium battery can be solved.

Description

technical field [0001] The invention belongs to the technical field of battery production, and in particular relates to a lithium battery formation method. Background technique [0002] Lithium batteries have the advantages of small size, light weight, high specific energy, and high safety, and are widely used in products such as automobiles, mobile phones, and notebooks; among them, the formation of lithium batteries is a very important step in the production process. The formation is mainly to charge the battery after the liquid injection and set aside for the first time to form a solid electrolyte cross-sectional membrane. Since the formation of the lithium-ion battery is a process of activation for the first time, as the charging progresses, the internal voltage of the battery increases and is accompanied by gas The gas generated at the same time is immediately pumped away, but in the actual operation process, the electrolyte will also be pumped out when the gas is pumpe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/44H01M10/0525H01M10/058
CPCH01M10/0525H01M10/058H01M10/446Y02E60/10Y02P70/50
Inventor 董清世刘海青
Owner 信义电源(苏州)有限公司
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