How to start the BAIC EU5 when the auxiliary battery is dead?

[LeJuliet]

Open the front hoods of both vehicles, connect the negative terminal of the jumper cable to the negative terminal of the car, and the other end to the negative terminal of the other vehicle. Use a tow rope to securely fasten the front and rear sections of both vehicles. When starting, do so slowly to ensure synchronized speeds between the two cars.

[MacEvangeline]

I've helped my old neighbor with this several times. When the EU5's auxiliary battery is dead, the most common solution is a jump start. Find a fuel-powered car or a charged new energy vehicle, and open the front hood. The jump-start terminals on the EU5 are under the black cover on the left side of the engine bay. Connect the red positive clamp to the EU5 battery's positive terminal, and the black negative clamp to the metal frame of the body—avoid connecting it to the battery's negative terminal. After starting the rescue vehicle's engine, wait five minutes before attempting to start the EU5. If the auxiliary battery is severely aged, it's best to replace it as soon as possible. The EU5 was designed with jump-starting in mind, so the battery location is easier to find than in traditional cars. Use jumper cables with a cross-section of at least 2 square millimeters for safety. After jump-starting, it's advisable to drive the car for half an hour to recharge the auxiliary battery, or simply replace it with a new one for peace of mind.

[StRyan]

Last time someone in my car club encountered this, the EU5's auxiliary battery was dead, but you can use the mechanical key to open the door. There's a small hole under the driver's door handle—insert the key to pry open the cover and twist to unlock. After entering the car, don’t press the start button. Instead, open the trunk emergency switch, located behind the center backrest of the rear seats. Remove the cover and pull the cord. Then, use an emergency jump starter to connect to the auxiliary battery—these portable power banks are much more convenient than jumper cables. Once connected, you can start the vehicle directly. The key is to choose one that supports 45 seconds of continuous power supply for reliability. If the battery is severely drained, you may need to recharge it repeatedly for a few minutes to be effective.

[McAnna]

The easiest solution is to keep a dedicated emergency power supply for new energy vehicles. Choose one with clips and a 12V voltage. Open the front hood to locate the battery, attach the red clip to the positive terminal, and the black clip to a metal part of the car body. After connecting the power, sit in the car, press the brake pedal, and directly press the start button. This emergency power supply can usually be stored in the glove box, and it's only slightly larger than a power bank. Note that the EU5 requires a higher current to start, so choose a power supply with a rated current of over 300A. After a successful start, drive immediately to a service center to check the battery's condition.

[DelMakayla]

I've tried using another electric vehicle for emergency jump-starting. First, find an EV with sufficient battery, then connect the two cars' batteries in the front compartment using jumper cables. For the EU5, pay attention to the connection method: positive to positive (red), negative to the metal bracket on the car body (black). Keep the rescue vehicle running for ten minutes before attempting to start the EU5. The key point is that the EU5's charging management system requires the auxiliary battery to have basic voltage to function, so you must wait long enough during the jump-start. If the auxiliary battery is completely aged, this method might not work. After starting, go to the 4S shop as soon as possible for inspection, as the battery might need replacement.

[Remington]

In such situations, there's a professional method: using a DC fast charging pile to directly charge the power battery. Even though the small battery is dead, the high-voltage contacts at the charging port still respond. After connecting the charging gun, the electricity charged into the main battery will be shared with the small battery. However, this operation is challenging and requires ensuring there's mobile phone signal near the charging pile. State Grid fast charging piles have a higher success rate, and just three minutes of charging can wake up the system. Nevertheless, it's difficult for ordinary users to operate, so it's recommended to prioritize using jump-starting or an emergency power supply. Remember, the EU5's fast charging port is located on the left rear fender, so pay special attention to safety during operation.