The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 2021
Filed:
Mar. 19, 2019
Contemporary Amperex Technology Co., Limited, Fujian, CN;
Yuqun Zeng, Ningde, CN;
Kai Wu, Ningde, CN;
Le Chu, Ningde, CN;
Jianwei Zhuo, Ningde, CN;
Qiandeng Li, Ningde, CN;
Contemporary Amperex Technology Co., Limited, Ningde, CN;
Abstract
The present application provides a power-down detection circuit and a control method. A low-voltage side power supply is connected to provide an output voltage of the low-voltage side power supply to a power-down detection sub-circuit and provide a standard supply voltage to the power-down detection sub-circuit, a controller and a memory via a voltage conversion circuit. The power-down detection sub-circuit is configured to obtain the output voltage of the low-voltage side power supply, and determine, according to the output voltage of the low-voltage side power supply, whether a power-down event occurs in the low-voltage side power supply. If it is determined that a power-down event occurs, a power-down signal is sent to the controller. The controller receives the power-down signal, and controls the memory to record current information of a high voltage bus sensed by a high-voltage side current sensor.