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1. (WO2011148926) POWER SUPPLY DEVICE

Pub. No.:    WO/2011/148926    International Application No.:    PCT/JP2011/061832
Publication Date: Dec 1, 2011 International Filing Date: May 24, 2011
IPC: G01R 31/02
B60L 11/18
H02J 7/00
Applicants: SANYO ELECTRIC CO.,LTD.
三洋電機株式会社
NAKAJIMA, Kaoru
中島 薫
NISHIMURA, Masato
西村 政人
Inventors: NAKAJIMA, Kaoru
中島 薫
NISHIMURA, Masato
西村 政人
Title: POWER SUPPLY DEVICE
Abstract:
Provided is a power supply device that prevents a fuse that is not blown out from being erroneously determined to be blown out and reliably detects a fuse blowout. The power supply device comprises: a driving battery (1) formed by connecting a plurality of battery units (2) in series; a fuse (19) connected to the driving battery (1) in series; a voltage detection circuit (3) using, as the ground line, a line connected to an end of the fuse (19), dividing the voltages of the battery units (2) by using a resistance voltage dividing circuit (11), and detecting the divided voltages; and a blowout detection circuit (4) for detecting the blowout of the fuse (19) from the detection voltages detected by the voltage detection circuit (3). When the detection voltage of a battery unit (2) connected on the side of the fuse (19) with respect to the ground line is within an abnormal range, the blowout detection circuit (4) determines the occurrence of a fuse blowout. Further, the power supply device determines the occurrence of a fuse blowout when the detection voltages of multiple battery units (2) detected by the blowout detection circuit (4) are within an abnormal range.