Compared with traditional vehicles, pure electric vehicles use large-capacity, high-voltage power batteries, high-voltage motors and electric drive control systems, and use a large number of high-voltage accessory equipment, such as: electric air conditioners, PTC electric heaters and DC/ DC converter, etc. The hidden high-voltage safety hazards and the high-voltage damage caused by this are completely different from traditional fuel vehicles.
According to the special structure and circuit complexity of pure electric vehicles, and considering the high-voltage safety issues of pure electric vehicles, it is necessary to carry out safe and reasonable planning and design and necessary monitoring of the high-voltage system, which is necessary for the safe operation of electric vehicles. ensure.
As the safety management unit of the pure electric vehicle high-voltage system, a reasonable functional layout and a safe and reliable control strategy are important guarantees for the realization of the system’s functions.
The overall goal of high-voltage electrical system control and safety management and fault diagnosis is to ensure the safety of high-voltage power consumption in the whole process of pure electric vehicles, including stationary, running and charging.