Design of electric vehicle hybrid power supply discharge control strategy

Abstract:
This paper proposes a new electric vehicle energy supply system, which can provide a more stable power battery output current while ensuring the high current output supply load of the electric vehicle, and protect the battery discharge capacity from exceeding the upper limit. The discharge characteristics of the power battery and the starter battery are highly complementary. According to the operation status of electric vehicles, this paper establishes the circuit model of the energy supply system, establishes the control model and verifies the feasibility of the model by simulation. A high energy density starter battery is combined with a conventional power battery through a DC/DC circuit. Experiments have shown that the energy supply system can meet the smooth operation for a long time and can also meet the sudden increase of current demand.