Research on Extraction of Discharge Behavior Parameters of Valve-regulated Lead-acid Battery Based on Dynamic Equivalent Circuit Model

In order to realize the real-time control of the charging and discharging process of lead-acid batteries in substations, this paper takes 2V, 200Ah valve-regulated lead-acid batteries as the research object. Based on experimental data and existing data information, the establishment considers electricity, heat, nonlinear behavior and temperature estimation, The nonlinear dynamic equivalent circuit model of VRLA battery. Study the influence of different discharge rates on the battery capacity; study the function of the non-linear parameters of the battery and the battery current and open circuit voltage, and study the influence of the battery temperature on the internal parameters. The experimental results show that the model results match the experimental results completely.