An Energy Management Strategy Based on Equivalent Consumption Minimum for Hybrid-Electric Aircraft with Battery Cooling System

With the advantage of non-pollution and high energy density, hybrid-electric aircraft has a good development prospect under the background of energy crisis. Considering that energy management strategies (EMS) and thermal management have a great impact on flight performance and energy consumption, this paper establishes a electrical-thermal coupling model of powertrain and thermal management system of hybrid-electric aircraft. Aiming at optimizing energy consumption, improving system efficiency and component thermal management, an optimized integrated energy management strategy is designed and verified by joint simulation with Simulink and AMESim. The result shows great performance in fuel economy and system efficiency. At ground temperature of 20°C, 30°C and 40°C, the equivalent energy consumption is reduced by 17.3%, 15.4% and 11.5% respectively compared with common rule-based EMS. In addition, the optimized strategy can improve the heat dissipation performance and reduce the temperature fluctuation of lithium battery.