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Ageing method of liquid electrolyte battery

A liquid electrolyte and battery technology, applied in secondary batteries, electrochemical generators, circuits, etc., can solve problems affecting battery performance, self-discharge bad batteries, etc., to improve battery quality, reduce defective product rate, and improve cycle performance Effect

Inactive Publication Date: 2010-03-31
SHENZHEN BAK BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing aging methods are all static methods, that is, the battery is static during the aging process, and the battery is placed upright or horizontally, so that there is excess electrolyte in some areas of the battery, while the electrolyte in other areas is not enough to make the electrolysis The liquid spreads evenly and fully in all parts of the battery, which affects the performance of the battery. Some batteries with bad self-discharge may not be picked out during this process.

Method used

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  • Ageing method of liquid electrolyte battery
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] For a liquid electrolyte battery of model 18650C4 with a capacity of 2200mAh, during the aging process, the aging temperature is set at 35°C and the aging time is 7 days. Two methods are used for aging comparison. The first method is the existing static aging method; the second method is In the dynamic aging method, the rotation speed of the battery is 10 revolutions per minute. The self-discharge defect rate and cycle test results are shown in Table 1:

[0024] method

[0025] Table 1

Embodiment 1a

[0027] In Example 1, the rotation speed of the battery during aging was changed to 25 rpm, and other parameters were the same, and its self-discharge failure rate and cycle test results are shown in Table 2:

[0028] method

[0029] static aging

[0030] Table 2

Embodiment 1b

[0032] In Example 1, the aging temperature was adjusted to 45°C, and other parameters were the same, and the self-discharge defect rate and cycle test results are shown in Table 3:

[0033] method

[0034] table 3

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Abstract

The invention discloses an ageing method of a liquid electrolyte battery; the battery is placed for aging, in the placing process, the battery is in a variable accelerated motion state; the dynamic aging process of the battery can lead electrolyte liquid to be fully diffused and permeated, thereby improving the battery quality and circulating performance, being helpful to selecting the batter which has poor self-charging performance completely and reducing the defect rate.

Description

technical field [0001] The invention relates to a production process of a liquid electrolyte battery, in particular to an aging method for a liquid electrolyte lithium ion battery. Background technique [0002] After the pre-charging or formation process of liquid electrolyte lithium-ion batteries is completed, an aging process is usually required. This process is also called the storage process. You can choose to eliminate those bad batteries with large self-discharge. The existing aging methods are all static methods, that is, the battery is static during the aging process, and the battery is placed upright or horizontally, so that there is excess electrolyte in some areas of the battery, while the electrolyte in other areas is not enough to make the electrolysis The liquid spreads evenly and fully in all parts of the battery, which affects the performance of the battery. Some batteries with bad self-discharge may not be picked out during this process. [0003] Existing ...

Claims

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Application Information

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IPC IPC(8): H01M10/38
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 唐红辉刘先龙王驰伟唐联兴周冬王弗刚
Owner SHENZHEN BAK BATTERY CO LTD
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