High reliability of dual power supply based on semiconductor devices. For the single-circuit open-circuit fault of the dual-power design (including dual-power input and dual-power output), the semiconductor design is the same as the fuse in terms of safety, but for the single-circuit short-circuit fault, the protection action speed of the semiconductor device is much higher than that of the fuse. So it’s safer. The fusion of control and execution. The physical concept of the power distribution box is diluted. FBCM, LBCM and RBCM are themselves an ECU and also play the role of a power distribution box. The functions of the two are integrated, and the BCM can directly control any load.