期刊
ENERGY
卷 193, 期 -, 页码 428-435出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2019.116555
关键词
Electric vehicle; Retired battery; Echelon use; Power characteristic; Capacity test protocol
资金
- Natural Science Foundation of Shanghai [17ZR1411200]
- Alliance Plan of Shanghai Municipal Promotion Association for Transformation of Scientific and Technological Achievements [LM201906]
- Social Science Programs of the Education Ministry [16YJAZH035]
- Open Fund of Jiangsu Engineering Research Center of Power Conversion and Application (China Electric Power Research Institute) [5242001700DM-C]
- State Grid Science and Technology Project [520940170022]
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, China
- Global Environment Facility [150157]
The performance of retired EV battery modules was tested in order to learn their attenuation states and different capacity test protocols of retired modules are compared in order to strike a balance between calibration accuracy and test time. The results show that most modules have no serious capacity fading while a minority of modules whose capacity is less than 80% SOH will bring about the capacity of the whole battery system down to below 80% SOH. Echelon use of EV battery from aspect of modules has more value than that from aspect of packs. The capacity fading of Pack 2 is more than that of Pack 1 due to a rise in temperature because the cold air enters the side of Pack 1 and exits from the side of Pack 2. High capacity is not always related to small resistance, showing that different modules have experienced different ageing processes. The retired modules still have good discharge ability at 25%-200% of rated power, implying that a retired battery energy storage system can be employed to satisfy power demand of electricity grid. The capacity test protocol of 1/3 C constant current process without constant voltage process is proposed for retired modules. (C) 2019 Published by Elsevier Ltd.
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