Series Hybrid Electric Vehicle Energy Control Strategy

The energy control strategy for series hybrid electric vehicles encompasses thermostat control strategy and coordination mechanisms between electric motor and engine operations. When the battery State of Charge (SOC) remains within the optimal operating range, the vehicle's propulsion energy is primarily supplied by the electric motor, with engine activation determined by real-time energy requirements. Implementation typically involves SOC threshold monitoring through battery management system (BMS) sensors and decision-making algorithms. When SOC falls below the lower limit, the control system activates the engine through ECU commands to provide propulsion power, while surplus energy generated is converted through power electronics and stored in the battery via charging circuits. Conversely, when SOC exceeds the upper threshold, the engine management system receives shutdown signals, transferring all propulsion duties to the electric motor powered by the battery. The coordination strategy employs fuzzy logic or rule-based controllers that continuously monitor vehicle speed, acceleration demands, and road conditions to dynamically adjust power distribution ratios. These adaptive algorithms ensure optimized energy efficiency and stable vehicle performance across diverse driving scenarios, with real-time adjustments made through CAN bus communication between powertrain components.