断开电池与整车的连接线路（高压与低压线路），使用AC500V 绝缘表检

Disconnect the connection lines between the battery and the vehicle (high voltage and low voltage lines), and use an AC500V insulation meter to test the insulation resistance of the positive or negative battery to the car body. If the insulation resistance is less than 20 MΩ, you need to check the insulation between the box and the car body. Whether the part is damaged or there is water, replace the damaged parts in time, or remove the water marks on it, if it still can't be solved, notify the manufacturer or supplier in time.

Disconnect the connecting line between the battery and the whole vehicle (high voltage and low voltage lines), use Ac500V insulation meter to detect the insulation resistance of the positive or negative pole of the battery to the vehicle body. If the insulation resistance is less than 20 m Ω, it is necessary to check whether the insulation part connected between the box and the vehicle body is damaged or has water, replace the damaged parts in time, or remove the water stains on it. If it cannot be solved, timely notify the manufacturer or supplier for treatment.

Disconnect the connection lines (high voltage and low voltage lines) between the battery and the whole vehicle, and use AC500V insulation meter to detect the insulation resistance of the positive or negative electrode of the battery to the vehicle body. If the insulation resistance is less than 20 MΩ, it is necessary to check whether there is any damage or water in the insulation part between the box body and the vehicle body, replace the damaged parts in time, or remove the water marks on it. If it can't be solved, notify the manufacturer or supplier in time.