○ Working on slave model, equivalent to power battery ○ Working on power-driven condition, the consistent voltage could be supplied to control system. ○ Working on power-driven condition, the energy returns back to DC cable or power system. ○ Work on customized battery resistance wave; simulate output character of electric vehicle on different working condition. 2、Working on Master model, system is equivalent to one power battery meter. ○ Performance test, to test different performance of battery in charging ○ Cycle durability test, to measure the extreme cycle of battery ○ Simulation test, to test battery work condition of electric vehicle on road driving by simulation