Cycle life prediction of traction battery based on degradation data |
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Authors: | Meng Xiangfeng Wang Zhenpo |
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Institution: | [1]China Automotive Technology & Research Center, Tianjin 300162, P.R. China [2]School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China |
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Abstract: | The traction battery cycle life prediction method using performance degradation data was proposed. The example battery was a commercialized lithium-ion cell with LiMn2O4/Graphite cell system. The capacity faded with cycle number follows a traction function path. Two cycle life predicting models were established. The possible cycle life was extrapolated, which follows normal distribution well. The distribution parameters were estimated and the battery reliability was evaluated. The models' precision was validated and the effect of the cycle number on the predicting precision was analysed. The cycle life models and reliability evaluation method resolved the difficulty of battery life appraisal, such as long period and high cost. |
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Keywords: | traction lithium-ion battery performance degradation cycle life prediction cycle life model |
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