High-grade safety device based on double CPUs (Central Processing Unit) of pure electric vehicle

The invention relates to a high-grade safety device based on double CPUs (Central Processing Unit) of a pure electric vehicle. The CPUs are the core of a vehicle control unit and comprise a master CPU and a slave CPU; the two CPUs are arranged on the same circuit board. The master CPU and the slave CPU collect and master control a key signal, are mutually communicated through an SPI (Serial Peripheral Interface), mutually detect whether abnormity occurs or not, and treat the normal condition in real time, so that the whole system can keep the normal work status. According to the high-grade safety device based on double CPUs of the pure electric vehicle, the safety and the reliability of the vehicle control unit are further improved, and the failure rate of parts of the pure electric vehicle is reduced. Two independent power chips are used to independently supply power to the master CPU and the slave CPU, and the slave CPU judges whether the master CPU meets the conditions of power up and down or not and sends power up and down commands, so that the power supply of the master CPU is not affected when a power supply of the slave CPU is abnormal. The failure and the function abnormity of the whole vehicle cannot be caused no matter which CPU has hardware or software fault.