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:
Apr. 07, 2015
Filed:
Mar. 28, 2012
Shintaro Tazaki, Kanagawa, JP;
Shintaro Tazaki, Kanagawa, JP;
Abstract
The relay-welding detection circuit detects welding of relays (RYP, RYN) provided on a charging path from an external power supply (PW) to a first battery (), and is provided with: a second battery () that can supply a welding-detection power supply independently of the external power supply (PW); a transistor switch () that is a circuit in which there is substantially zero current flowing in from the external power supply (PW) side of the relays, and that controls whether or not to supply the welding-detection power supply to the second battery () on the basis of the voltage at the external power supply (PW) side of the relays; and a control unit () that is electrically insulated from the transistor switch (), and that to detects welding of the relays (RYP, RYN) on the basis of whether or not the transistor switch () has supplied the welding-detection power supply.