Abstract: According to the sodium-nickel chloride battery data published by CESI and based on the discharge relaxation measurement, the parameters of second order RC dynamic model of the sodium-nickel chloride battery was identified. A simulation model was built and the simulation result shows that the parameters obtained is rather precise. The equivalent circuit model can well simulate its dynamic characteristics, and can be used for the battery monitoring and management system.

Key words: sodium-nickel chloride battery, second order RC dynamic model, parameters identification