基于容量修正的安时积分SOC估算方法研究*

doi:10.19562/j.chinasae.qcgc.2020.05.017

Abstract

Abstract: In view of the error caused by that the SOC estimation algorithm based on traditional ampere-hour integral method regards battery capacity as constant, a modified ampere-hour integral method with capacity correction is proposed, in which the initial SOC value of battery is determined by open circuit voltage and then corrected by correction factors related to charge/discharge current, coulombic efficiency and temperature, obtained by the charge and discharge tests of battery pack. The results of simulation and tests show that the modified ampere-hour integral method can effectively eliminate various errors and get more accurate estimation results, so it can be used in real time estimation of SOC or as a reference for the evaluation of other SOC estimation strategies

Key words: battery management system, SOC estimation, ampere-hour integral method, charge/discharge test

Luo Yong, Qi Pengwei, Huang Huan, Wang Jianan, Wang Yi, Li Peiran. Study on Battery SOC Estimation by Ampere-hour Integral Method with Capacity Correction[J].Automotive Engineering, 2020, 42(5): 681-687.

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Study on Battery SOC Estimation by Ampere-hour Integral Method with Capacity Correction

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