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:
May. 10, 2022
Filed:
Aug. 13, 2020
Yazaki Corporation, Tokyo, JP;
Yoshihiro Kawamura, Makinohara, JP;
YAZAKI CORPORATION, Tokyo, JP;
Abstract
In a ground fault detection apparatus, a first charge voltage of a detection capacitor measured with a positive electrode side of a high-voltage battery connected in series with a positive electrode side end of the detection capacitor and a negative electrode side end of the detection capacitor grounded, is compared with a second charge voltage of the detection capacitor measured with the positive electrode side end of the detection capacitor grounded and the negative electrode side of the high-voltage battery connected in series with the negative electrode side end of the detection capacitor. When the first charge voltage is smaller and degree of smallness is greater than a predetermined reference, it is determined that positive electrode side insulation resistance is decreased. When the second charge voltage is smaller and degree of smallness is greater than a predetermined reference, it is determined that negative electrode side insulation resistance is decreased.