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Rapid evaluation method for retired power battery

A power battery, fast technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the difficult and difficult problems of evaluating the status of decommissioned power batteries, and achieve the effects of improving efficiency, simplifying switching time, and ensuring accuracy

Active Publication Date: 2017-12-22
SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV
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  • Summary
  • Abstract
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Problems solved by technology

For decommissioned power batteries, the working conditions before decommissioning vary widely, so it is difficult to use a unified battery model and state estimation algorithm to evaluate the state of decommissioned power batteries

Method used

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  • Rapid evaluation method for retired power battery

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Such as figure 1 As shown in Fig. 1, an assembly line test bench is set up for the measurement of decommissioned battery packs, and the actual capacity, voltage consistency, power and internal resistance are measured on different work benches, and the self-discharge rate parameters are evaluated. Set workbench 1, workbench 2, static storage area, and workbench 3 in sequence. Workbench 1 is equipped with a set of power supply and load equipment, the purpose of which is to complete the battery capacity test through charging and discharging; workbench 2 is equipped with power and internal resistance test equipment, the purpose is to complete the battery in the case of low remaining power (SOC). Discharge capacity test; workbench 3 is equipped with a separate load device, the purpose is to complete the self-discharge of the battery after standing for a week.

[00...

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Abstract

The invention relates to the technical field of battery evaluation, and discloses a rapid evaluation method for a retired power battery. The method comprises the steps that 1 a retired battery pack is placed on a test platform, and a charging and discharging device is used to measure the capacity of the retired battery pack; 2 power and the internal resistance are measured when the remaining power of the retired battery pack is 20%; 3 the retired battery pack is fully charged and stands for 1 week; and 4 the self-discharge rate of the retired battery pack is measured. The test time of the retired power battery is reduced from 1 to 2 months to approximately 1 week; the test switching time of evaluation parameters is significantly simplified; the state evaluation efficiency of the retired battery pack is greatly improved; and the acquired state evaluation parameters of the retired battery are greatly accurate.

Description

technical field [0001] The invention relates to the technical field of battery evaluation, in particular to a rapid evaluation method for decommissioned power batteries. Background technique [0002] When the battery has been used for a period of time and the capacity of the battery is less than 80% of the rated capacity of the battery when it is fully charged, the battery should be replaced. Therefore, for the decommissioned battery pack, it is first necessary to determine its actual capacity after decommissioning. With the attenuation of battery capacity, compared with new batteries, the internal resistance of retired battery packs generally increases, the discharge power of batteries will also change, and the consistency of batteries and battery charge retention will deteriorate. [0003] Therefore, the status evaluation of retired battery packs needs to integrate capacity, internal resistance, power, self-discharge rate, and battery consistency to obtain a comprehensive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/389G01R31/392
Inventor 肖伟陈家良康权舒小农李澌翰何岸金晨宁
Owner SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV
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