What are the precautions for repairing new energy vehicles?
2 Answers
When repairing new energy vehicles, it is necessary to turn off the high-voltage switch before maintenance and follow the safety operation procedures for electrical circuits during maintenance. The following are specific details: Turn off the high-voltage switch before maintenance: If the repair involves the power system during operation, the power supply must be disconnected. To prevent electric shock, it is necessary to wear insulated gloves and insulated shoes, and use insulated tools in accordance with the specified procedures and processes. Follow the safety operation procedures for electrical circuits during maintenance: Due to the characteristics of new energy vehicles, the power battery is the power source of electric vehicles, providing continuous and stable energy for the entire vehicle to ensure normal driving. Currently, ternary lithium-ion batteries are widely used in electric vehicles. The high-voltage electricity in the vehicle's power battery ranges from 380 to 650 volts, so it is essential to follow the safety operation procedures for electrical circuits during maintenance.
Maintenance of new energy vehicles requires extreme caution—high voltage is no joke! I've personally witnessed a mechanic getting injured by a blue electric arc due to improper operation. The first step before working on the vehicle must be to cut off the power—not just turning off the ignition, but also removing the maintenance switch and waiting several minutes for the high-voltage capacitors to discharge completely. It's even safer to disconnect the 12V battery terminals. Never touch the orange high-voltage wiring harnesses carelessly during repairs; always use a multimeter to ensure no residual voltage remains, and wear insulated gloves rated for 1000V or higher. Protective equipment should be tested every six months, and the emergency power-off marking on the roof must be clearly displayed. Remember to place warning signs in the work area and lay down an insulated mat on the ground for added safety.
