High-voltage on-off control method for pure electric vehicle

• Main Authors: CHEN LEI, LIU JIANHAO, YANG QIFU, REN JIANHUA, LIU QIDA, ZHANG QINGFENG, ZHANG HUANHUAN
• Format: Patent
• Language: Chinese; English
• Published: 14.07.2023
• Subjects: ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR

The invention discloses a high-voltage on-off control method for a pure electric vehicle, which comprises the following steps of: performing self-inspection on a high-voltage interlocking circuit through a BMS (Battery Management System), judging a fault of the high-voltage interlocking circuit, if the fault does not occur, allowing high-voltage power-on, and if the fault occurs, forbidding high-voltage power-on; the high-voltage interlocking circuit is characterized in that a pin 87 of an MC relay is connected with a pin 9 of a compressor controller; after a pin 9 and a pin 8 in the compressor controller are communicated, the pin 8 of the compressor controller is connected with a pin 11 of the BMS low-voltage connector; after a pin 11 and a pin 12 of the BMS low-voltage connector are communicated in the BMS low-voltage connector, the pin 12 of the BMS low-voltage connector is connected with a pin 15 of the all-in-one low-voltage connector; and after a pin 15 and a pin 26 of the all-in-one low-voltage connect