An SOC estimation approach based on adaptive sliding mode observer and fractional order equivalent circuit model for lithium-ion batteries

作者：Zhong, Fuli^*; Li, Hui; Zhong, Shouming; Zhong, Qishui; Yin, Chun

来源：Communications in Nonlinear Science & Numerical Simulation, 2015, 24(1-3): 127-144.

DOI：10.1016/j.cnsns.2014.12.015

• SOC estimation
• Adaptive sliding mode observer
• Fractional order equivalent circuit model
• Lithium-ion battery

A state of charge (SOC) estimation approach based on an adaptive sliding mode observer (SMO) and a fractional order equivalent circuit model (FOECM) for lithium-ion batteries is proposed in this paper. In order to design the adaptive sliding mode observer (SMO) for the SOC estimation, the state equations based on a FOECM of battery are derived. A new self-adjusting strategy for the observer gains is presented to adjust the observer in the estimating process, which helps to reduce chattering and convergence time. Furthermore, a continuous and smooth function called hyperbolic tangent function is applied to balance the chattering affection and the disturbance. At last, a battery simulation model is established to test the SOC estimation performance of the designed SMOs, and the results show the proposed approach is feasible and effective.

• 出版日期2015-7
• 单位电子科技大学