Research on electrical brake of a series-parallel hybrid electric vehicle

For the sake of high-efficiency energy recycling and brake security for series-parallel hybrid electric vehicle, an integrated brake system with an electric consuming brake subsystem and advanced strategy is proposed. The brake processes in different brake conditions are analyzed. A brake control strategy relying on the brake condition is applied in the series-parallel hybrid electric vehicle. In view of the complexity and dynamic characteristics, a coupled whole vehicle model which combined the driveline model and the thermal management system model is proposed to study the energy flow and utilization in the different electrical brake processes. A simulation of the whole vehicle under an UDDS driving cycle is studied. According to the simulation result, the integrated brake system and control strategy are effective for the series-parallel hybrid electric vehicle. It not only can ensure the security of the vehicle driving and battery energy storage, but also can enhance the energy utilization and prolong the life of mechanical brake device in the brake process.