To address the challenge of balancing modeling accuracy and computational efficiency in battery energy storage systems (BESS) caused by cell parameter dispersion and multi-timescale coupling effects
this paper proposes a multi-time scale simulation method for BESS based on multi-layer dynamic circuit modules. This method comprehensively considers the electro-thermal-aging coupling characteristics of lithium-ion batteries
cell inconsistency
and the state of charge (SOC) equalization control strategy of the battery management system (BMS) to construct a refined multi-time scale model. It realizes the dynamic treatment of differential terms through fourth-order Runge-Kutta numerical integration and proposes a solution method for multi-layer loop currents. Simulation analysis demonstrates that the proposed method accurately characterizes the electrical
thermal
and aging behaviors
as well as cell inconsistency effects during BESS operation
while significantly improving computational efficiency without compromising accuracy.
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