Study on High Voltage power up down control strategy of pure electric vehicles

The research of electric vehicles has attracted more and more attention. High voltage (Hv) power up/down control strategy which sometimes could be complicated yet confused, is very important part of pure electrical vehicle algorithm. This study gives an Hv power up/down control strategy which divides the high voltage power up/down control into five stages. In each stage, the operation mode is set reasonably based on various system situations. The diagnosis and fault handling procedure were also developed and put inside the control strategy algorithm too. A simulation was setup and run, the test result could prove that the proposed control strategy has very good efficiency and reliability.