Battery SOC Estimation Method Based on BP Neural Network Optimized by Genetic Algorithm

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Battery SOC Estimation Method Based on BP Neural Network Optimized by Genetic Algorithm

Ma, Xingyuan / Liu, Yang / Li, Chenxu / Tang, Geng / Zhang, Gang / Qiu, Ruichang

The state of charge (SOC) of battery is an important indicator of battery condition assessment. Accurate SOC estimation can reflect the real-time capacity of battery and effectively extend the service life of battery. In this paper, aiming at the problem that the error function of BP neural network is easy to fall into local optimum and the effect of initial weight and threshold reverse iterative updating is limited, a neural network optimized by genetic algorithm is proposed to improve the estimation accuracy and global fast optimization. By studying the equivalent first-order RC model of the battery and building the simscape simulation model to simulate the charging and discharging process of the battery, the parameters of the battery terminal voltage, current, internal resistance, temperature and battery SOC are obtained. After the data is processed, the voltage, current, internal resistance and temperature are taken as the factors of battery SOC estimation. The experimental results show that the neural network optimized by genetic algorithm can obtain the optimal initial threshold and weight globally, thus establishing a high-precision SOC estimation model of battery, avoiding local optimization and improving the estimation accuracy of battery.

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Title :

Battery SOC Estimation Method Based on BP Neural Network Optimized by Genetic Algorithm

Additional title:

Lect. Notes Electrical Eng.

Contributors:

Qin, Yong (editor) / Jia, Limin (editor) / Liang, Jianying (editor) / Liu, Zhigang (editor) / Diao, Lijun (editor) / An, Min (editor) / Ma, Xingyuan (author) / Liu, Yang (author) / Li, Chenxu (author) / Tang, Geng (author)

Conference:

International Conference on Electrical and Information Technologies for Rail Transportation ; 2021 October 21, 2021 - October 23, 2021

Published in:

Proceedings of the 5th International Conference on Electrical Engineering and Information Technologies for Rail Transportation (EITRT) 2021 ; Chapter : 6 ; 45-56

Lecture Notes in Electrical Engineering ; 868

Publication date :

2022-02-23

Size :

12 pages

ISBN :

978-981-16-9913-9 , 978-981-16-9912-2

ISSN :

1876-1119 , 1876-1100

DOI :

https://doi.org/10.1007/978-981-16-9913-9_6

Type of media :

Article/Chapter (Book)

Type of material :

Electronic Resource

Language :

English

Keywords :

State-of-charge estimation , BP neural network algorithm , Genetic algorithm Engineering , Transportation Technology and Traffic Engineering , Computational Intelligence , Control and Systems Theory , Computer Applications

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