Method for rapidly screening self discharge of lithium iron phosphate battery

A lithium iron phosphate battery and self-discharge technology, applied in the field of flanges, can solve the problems of labor and equipment waste, long cycle time, large manufacturer capital and warehouse occupation, etc., and achieve the effect of short process time, good accuracy and comparability

Inactive Publication Date: 2013-01-30
合普新能源科技徐州有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, it takes a long time to do this. It often takes more than one month for the battery to be shipped from production to final

Method used

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Experimental program
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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] As shown in Figure 1, a method for quickly screening the self-discharge of lithium iron phosphate batteries is: when the charging of lithium iron phosphate batteries is completed in separate steps, prolong the storage time, and record the voltage of the battery at each time point during storage; , extend the storage time, and record the voltage of the battery at each time point during storage; select the voltage value corresponding to a specific time point as the basis for screening self-discharge.

[0019] The screening steps are as follows:

[0020] The first step is to charge the lithium iron phosphate battery: charge at a constant current of 0.2C~1C to 3.65V~3.85V, turn to constant voltage charging until the current drops to 0.01C~0.05C, and end charging;

[0021] The second step is to put the charged lithium iron phosphate battery ...

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Abstract

The invention discloses a method for rapidly screening self discharge of a lithium iron phosphate battery. The method comprises the following steps of: prolonging the laying time when the capacity grading working procedure charging of the lithium iron phosphate battery is finished, and recording the voltage of the battery at each time point in laying; prolonging the laying time when discharging is finished, and recording the voltage of the battery at each time point in laying; and selecting the voltage value corresponding to the specific time point as the basis for screening self discharge. The method has the beneficial effects that the self discharge screening is carried out through prolonging the technology time during the production process, and the data test record is directly completed on a test cabinet, thus the technology time is short, and the data accuracy and comparability are better.

Description

technical field [0001] The invention relates to a method for quickly screening the self-discharge of lithium iron phosphate batteries, which belongs to the field of flanges. Background technique [0002] The depletion of petroleum resources and the increasing environmental pressure have brought huge business opportunities for the development of new energy industries, among which power batteries are one of the new energy industries that countries vigorously support and develop. [0003] At present, all countries are stepping up research on various advanced energy storage technologies, and developing various power batteries with high specific energy, long cycle life and low price. According to the current technical development and comprehensive analysis and actual verification of power battery performance, lithium-ion power batteries, especially lithium-ion power batteries based on lithium iron phosphate, are the preferred power batteries at this stage. At present, many devel...

Claims

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Application Information

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IPC IPC(8): H01M10/058B07C5/344
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 马猛薄忠成焦学波张如刚
Owner 合普新能源科技徐州有限公司
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