Using SoC Online Correction Method Based on Parameter Identification to Optimize the Operation Range of NI-MH Battery for Electric Boat

Bumin Meng, Yaonan Wang, Jianxu Mao, Jianwen Liu, Guochang Xu and Jian Dai
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Bumin Meng: The College of Electrical and Information Engineering, Hunan University, Changsha 410082, Hunan, China
Yaonan Wang: The College of Electrical and Information Engineering, Hunan University, Changsha 410082, Hunan, China
Jianxu Mao: The College of Electrical and Information Engineering, Hunan University, Changsha 410082, Hunan, China
Jianwen Liu: The College of Electrical and Information Engineering, Hunan University, Changsha 410082, Hunan, China
Guochang Xu: The National Engineering Research Center of Advanced Energy Storage Materials, Changsha 410205, Hunan, China
Jian Dai: The National Engineering Research Center of Advanced Energy Storage Materials, Changsha 410205, Hunan, China

Energies, 2018, vol. 11, issue 3, 1-20

Abstract: This paper discusses a design of a Battery Management System (BMS) solution for extending the life of Nickel-Metal Hydride (NI-MH) battery. Combined with application of electric boat, a State of Charge (SoC) optimal operation range control method based on high precision energy metering and online SoC correction is proposed. Firstly, a power metering scheme is introduced to reduce the original energy measurement error. Secondly, by establishing a model based parameter identification method and combining with Extended Kalman Filter (EKF) method, the estimation accuracy of SoC is guaranteed. Finally, SoC optimal operation range control method is presented to make battery running in the optimal range. After two years of operation, the battery managed by proposed method has much better status, compared to batteries that use AH integral method and fixed SoC operating range. Considering the SoC estimation of NI-MH battery is more difficult becausing special electrical characteristics, proposed method also would have a very good reference value for other types of battery management.

Keywords: NI-MH battery; pure electric boat; state of charge; battery management systems; battery state estimation model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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