The EVWS series battery simulator designed and manufactured by Shandong Wocen Power Supply, according to the different needs of users for testing, the regular models are battery simulators from 50KW to 500KW, and can also be customized according to the special needs of users. The battery simulator can work in different working modes such as CV/CC/CP, which can meet the precise test requirements of different loads; in addition, this power battery simulator has the function of bidirectional energy flow. During the motor test process, it not only provides a stable DC voltage for the load to meet the normal test function, but also feeds the energy of the motor power generation state back to the grid when the test is abnormal or shut down, so as to prevent load damage caused by energy accumulation.