What are the common high-voltage safety protections for new energy vehicles? What's the difference between it and traditional car protection?

The main difference of new energy vehicles lies in focusing on the protection of power supply. For power safety, an important aspect of a series of high-voltage protection, self-insulation design and high-voltage safety is the insulation level of the system. The high-voltage system of electric vehicle includes battery pack, motor and motor controller, and a series of on-board appliances. As required, high-voltage components are distributed throughout the automobile chassis, between the live part of the high-voltage circuit and its own shell, and between the high-voltage circuit and the vehicle chassis.

Conflict interrupt strategy

The first collision power-off strategy is the collision power-off realized by airbag and vehicle controller. The collision sensor is installed on the vehicle body. After the accident, the sensor immediately transmits the information to the airbag through the hard wire.

The airbag judges whether the collision is true or not, and if it is true, it sends a hard-wired signal to the vehicle controller. After the vehicle controller detects the collision signal, it continuously sends the collision power-off instruction to the battery pack. After the battery pack receives the same collision power-off instruction several times in a row, it cuts off the relay of the main circuit of the power supply. At this time, there is no high voltage inside the battery pack.