US 11,656,672 B2
Method for controlling a power-down detection circuit, controller and computer readable storage media
Yuqun Zeng, Ningde (CN); Kai Wu, Ningde (CN); Le Chu, Ningde (CN); Jianwei Zhuo, Ningde (CN); and Qiandeng Li, Ningde (CN)
Assigned to Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed by Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed on May 7, 2021, as Appl. No. 17/315,260.
Application 17/315,260 is a continuation of application No. 16/357,552, filed on Mar. 19, 2019, granted, now 11,048,316.
Claims priority of application No. 201811083339.7 (CN), filed on Sep. 17, 2018.
Prior Publication US 2021/0263580 A1, Aug. 26, 2021
Int. Cl. G06F 1/26 (2006.01); G06F 1/30 (2006.01); G06F 1/32 (2019.01); G06F 1/3225 (2019.01); G06F 1/3234 (2019.01)
CPC G06F 1/3225 (2013.01) [G06F 1/263 (2013.01); G06F 1/30 (2013.01); G06F 1/3275 (2013.01)] 13 Claims
OG exemplary drawing
 
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.