CPC G06F 1/3225 (2013.01) [G06F 1/263 (2013.01); G06F 1/30 (2013.01); G06F 1/3275 (2013.01)] | 13 Claims |
1. A method for controlling a power-down detection circuit of a vehicle, comprising:
receiving, by a controller of the power-down detection circuit, a power-down signal, wherein the power-down signal is sent from a power-down detection sub-circuit of the power-down detection circuit when it is determined by the power-down detection sub-circuit that an output voltage of a low-voltage side power supply of the power-down detection circuit is smaller than a threshold, and wherein the power-down detection sub-circuit and the controller are powered by the low-voltage side power supply;
controlling, by the controller, a memory of the power-down detection circuit to record fault information, wherein the fault information comprises current information of a high voltage bus sensed by a high-voltage side current sensor of the power-down detection circuit, wherein the high-voltage side current sensor is located in a high-voltage side circuit of the vehicle having the high voltage bus, and wherein the high-voltage side circuit comprises the high-voltage side current sensor, a high-voltage side battery pack and a contact or, wherein the contactor comprises a positive contactor connected to a positive electrode of the high-voltage side battery pack and a negative contactor connected to a negative electrode of the high voltage side battery pack; and
performing, by the controller, a fault diagnosis based on the fault information.
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