Analysis on Low Temperature Cold Starting Performance of Parallel Hybrid Electric Vehicle with Ultra-Capacitor

Assessment test on low temperature cold starting performance of Parallel Hybrid Electric Vehicle (PHEV) with ultra-capacitor was carried out in the testing environmental warehouse which can provide constant temperature from -20°C to 0°C. The study focused on: hardware performance of multi-energy management system (MEMS), output torque of Integrated Starter and Generator (ISG) when it was in electric or power generation state, the voltage and current characteristic of its bus bar and the voltage dropping characteristics of ultra-capacitor during charging and discharging process. The experimental results showed that impact starting mode can improve the starting performance of PHEV at low temperature.