Research on Control Strategy for Braking Energy Recovery of Dual Energy Source Pure Electric Vehicles
This article takes the dual energy source pure electric vehicle driven by a permanent magnet DC motor as the research object,with the aim of developing a reasonable and efficient braking energy recovery system for pure electric vehicles and designing corresponding control strategies.The mathematical models of components such as bat-teries,supercapacitors,and bidirectional DC/DC converters are established,and the main circuit of the dual energy source system and the constant current and constant voltage dual closed-loop PI controller are designed and studied,a simulation model of the system was established and simulated.The simulation results showed that the PI controller can effectively achieve constant current and constant voltage charging and discharging processes.Constant current charging is used to limit the charging current,and constant voltage charging is carried out when the battery reaches the rated voltage or the supercapacitor SOC saturation,achieving the goal of protecting the energy storage components and fully charging them.
electric vehiclesdual energy sourceconstant current and constant voltage dual closed-loop controlbrake energy recovery
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