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:
Dec. 01, 2020
Filed:
Feb. 14, 2018
Contemporary Amperex Technology Co., Limited, Fujian, CN;
Xiang Ao, Fujian, CN;
Contemporary Amperex Technology Co., Limited, Ningde, CN;
Abstract
The present invention discloses a relay diagnostic circuit for a number of relays connected in series between an electric vehicle power supply end and a load or a charging end. The relay diagnostic circuit includes a number of voltage divider branches connected to a same reference ground, an isolation unit and a judgment unit. Each of the voltage divider branches is configured to obtain the voltage of one end of each relay and output the voltage after dividing the voltage. The isolation unit is configured to isolate and convert a number of divider voltages output from the number of voltage divider branches and output the voltages to the judgment unit. The judgment unit is configured to compare a comparison information of divided voltages at two ends of each relay with a corresponding driving state of the relay and obtain the diagnosis result of each relay.