关键词: 车辆工程, 滑模观测器, SOC估计, Thevenin模型, 锂离子动力电池, 电动汽车

Abstract:

The parameters of equivalent circuit of lithium-ion power battery were obtained from the hybrid pulre power characterization test data model, a state-of-charge(SOC) estimation method for the lithium-ion power battery was proposed using a sliding mode observer. The sliding mode observer was designed and descriled in detail. Its algorithm was verified and evaluated by experiments and comparisons with the traditional method. The results show that under the FUDS condition, SOC estimation with the sliding mode observer gives the maximum error of 1.17% with variance of 0.000 04,which is more accurate and robust than the traditional algorithm.

Key words: vehicle engineering, sliding mode observer, state-of-charge estimation, thevenin model, lithium-ion power battery, electric vehicles