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Power battery echelon-use assessment method

A power battery and step-by-step technology, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., to achieve the effect of improving the matching effect, reliability and reliability

Inactive Publication Date: 2016-06-15
HIGER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a battery screening and grouping method for cascaded utilization, which can not only ensure the reliability of analysis and the reliability of use after grouping, It does not require expensive equipment and complicated detection and analysis

Method used

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  • Power battery echelon-use assessment method

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Effect test

Embodiment 1

[0031] For the battery of pure electric vehicles, the capacity and internal resistance evolution mode are counted separately, and the fault and temperature history are counted. First, the bad cells are eliminated according to the fault, temperature abnormality, and evolution discontinuity. According to the same capacity, internal resistance and evolution mode, Refer to the new battery configuration parameters for configuration. In the cascade utilization process, if the use effect is not as expected, take the battery cells with outstanding attenuation for CT imaging, appearance test and disassembly analysis, correct the evolution mode, and revise the standard for removing bad cells. Such a cycle forms a better cascade utilization evaluation and grouping method.

Embodiment 2

[0033] For the batteries of hybrid electric vehicles, the individual voltage / whole group SOC and internal resistance evolution mode are counted separately, and the fault and temperature history are counted. Same as the evolution mode, refer to the new battery configuration parameters for configuration. In the cascade utilization process, if the use effect is not as expected, take the battery cells with outstanding attenuation for CT imaging, appearance test and disassembly analysis, correct the evolution mode, and revise the standard for removing bad cells. Such a cycle forms a better cascade utilization evaluation and grouping method.

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Abstract

The invention discloses a power battery echelon-use assessment method, and provides an echelon-used battery core screening and assembling method which aims at defects of a current echelon-use judgment method and an assembling use method. The analysis credibility and the used reliability after the assembly is performed can be ensured without expensive instruments and equipment or complicated detection and analysis. The power battery echelon-use assessment method establishes a unique tracing code for each new battery core, calculates an evolution mode of the battery core, forms a bad battery core removal standard, and removes the back battery core. The batteries out of service are assembled and used. An analysis method of the evolution mode of a remote monitoring server and the bad battery core removal standard are corrected. The power battery echelon-use assessment method uses the whole historical data of the battery cores for analysis. Based on evolution predicted consistency, in comparison with state parameter matching groups, a life of an echelon-use battery pack gets maximum play, and the matching group effect, the credibility and the reliability can be continuously raised without expensive matching groups or complicated tests.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to an evaluation method for cascade utilization of power batteries. Background technique [0002] Under the situation of environmental pressure and energy crisis, electric vehicle is a new vehicle product that is gradually being developed and promoted worldwide. Electric vehicles generally use lithium-ion batteries as energy storage units. It is generally stipulated that the power battery capacity is no longer suitable for use in electric vehicles after the capacity has decayed to 80% of the initial capacity. As the number of electric vehicles gradually increases, the replaced batteries More and more, how to utilize and dispose of decommissioned power batteries has become an urgent problem to be solved. If they are all scrapped as garbage, and the residual value of the power battery is not maximized, the cost of electric vehicles will be increased. Therefore, the research on cascad...

Claims

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Application Information

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IPC IPC(8): G01R31/36
CPCG01R31/382
Inventor 王世强熊金峰王秋飞周恒祥李浩晨张卫林
Owner HIGER
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