What are the precautions for repairing new energy vehicles?

[Nolan]

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.

[OCooper]

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.

[LeAlan]

When choosing a repair shop, don't just focus on the price; make sure they have official certification. The repair of new energy vehicles' three-electric systems is vastly different from traditional cars, and many ordinary repair shops simply can't handle battery management. I recommend checking whether the shop has a high-voltage repair operation certificate—having certified technicians is the most basic requirement. If the battery pack gets damp or is damaged in a collision, it should be sent to a shop with a temperature-controlled drying room. The workshop must be equipped with specialized new energy vehicle lifting platforms, as the lifting points differ from those of fuel-powered cars—getting it wrong could crush the battery baseplate.

[DiNorah]

The battery is the most expensive part of the entire car, and repairing it comes with an extremely high cost! Minor impacts may not damage the battery structure, but internal injuries can reduce its lifespan. Last time, Uncle Wang's car triggered the insulation fault light, and after being towed to a non-specialized shop for random inspections, he ended up paying nearly 100,000 yuan out of pocket to replace the entire battery set. Remember, never attempt a second start after water exposure—immediately contact an authorized service station for disassembly and inspection. During repairs involving water exposure, strictly monitor the battery's temperature changes. If you notice the battery swelling or deforming, isolate and handle it immediately.

[DiAndrew]

Repairing new energy vehicles is quite demanding on the environment. The workshop must be equipped with specialized insulated flooring, as traditional concrete floors pose electrical conductivity risks. Fire extinguishing equipment must include Class D fire extinguishers specifically designed for lithium batteries, as ordinary dry powder extinguishers are ineffective against battery fires. Lifting platforms require secondary insulation treatment, and repair bays need designated isolation zones. Before operating the air conditioning refrigeration system, refrigerant pressure must be measured, as improper refrigerant recovery can generate flammable gases. My experience suggests ventilating vehicles for half an hour before repairs, especially for recently collision-damaged ones.

[VonAlexandra]

Beyond hardware issues, you also need to understand computer systems. Eighty percent of new energy vehicle faults require connecting to a dedicated diagnostic computer to read data; without the original manufacturer's software, you can't fully read the fault codes. Last month, my car's charging slowed down. I replaced the charging module myself, but the charging power still wouldn't increase. Later, a professional technician used equipment to detect that the software wasn't initialized and matched. After repairs, remember to perform dynamic function tests—features like power steering and regenerative braking should be tested on the road to ensure they're functioning properly. Before any repairs, be sure to back up all vehicle controller data, as restoring factory settings might erase personalized configurations.