Research on Multi-Parameter Evaluation of Electric Vehicle Power Battery Consistency Based on Principal Component Analysis |
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| Authors: | Liye Wang Lifang Wang Chenglin Liao Wenjie Zhang |
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| Affiliation: | 1.Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing,China;2.Beijing Co-Innovation Center for Electric Vehicles,Beijing,China |
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| Abstract: | Electric vehicle power battery consistency is the key factor affecting the performance of power batteries. it is not scientific to evaluate the consistency of the battery depending on voltage or capacity. In this paper, multi-parameter evaluation method for battery consistency based on principal component analysis is proposed. Firstly, the characteristic parameters of battery consistency are analyzed, the principal component score can be used as the basis for evaluating the consistency of the battery. Then, the function that multi-parameter evaluation of battery consistency is established. Finally, battery balancing strategy based on fuzzy control is developed. The basic principle of fuzzy control is to fuzzy the input quantity based on expert knowledge, and the fuzzy control quantity is obtained by fuzzy control rule. The results are verified by test. |
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