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:
Nov. 05, 2013
Filed:
Feb. 25, 2011
Masaki Yugou, Kakogawa, JP;
Yutaka Yamauchi, Himeji, JP;
Masaki Yugou, Kakogawa, JP;
Yutaka Yamauchi, Himeji, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A power supply device includes a battery, positive and negative-side contactors and a controller. The battery supplies power to a load. The positive-side contactor is serially connected to the positive side of the battery, and the negative-side contactor is serially connected to the negative side of the battery. The controller determines whether the load connected to the output sides of the positive-side contactor and the negative-side contactor is in a connected or non-contact state. The controller includes a voltage detecting circuit that detects the capacitor voltage of a capacitor connected to the output sides of the positive-side contactor and the negative-side contactor, and a determination circuit that compares the detected voltage with a predetermined voltage and determines the connected state of the load.