Equalization Charge-discharge Control Strategy for Series-connected Vanadium Redox Flow Batteries Based on LC Oscillation Circuit

Research on series-connection vanadium redox flow batteries (S-VRBs) energy storage technology, an equalization scheme based on LC oscillation circuit is proposed. The inductor and capacitor are used to store energy and the state of charge (SOC) is used as an equalization criterion. The energy is transferred from the highest voltage VRB to the lowest voltage VRB. We build a simulation model of LC oscillation circuit in MATLAB/SUMLINK to verify the feasibility of the equalization scheme; and the VRB with different parameters is connected in series for charging and discharging equalization experiments. Simulations show that the LC oscillator circuit equalization control strategy can achieve VRB charge and discharge equalization, and the equalization speed is fast.