To provide a high reliability power storage device which is adapted to enable determination of a fault in its switching circuit part.
A power storage side FET 37 and a load side FET 39 are connected in series between a power storage unit 21 and a load 15. A control unit 29, before charging the power storage unit 21 after it started and while power is supplied to the load 15 via a bypass path having a main power supply side bypass FET 31 which supplies power for a main power supply 13 and the power storage side FET 37 and the load side FET 39 remain turned off, determines, based on voltage (Vd) at a contact point between the power storage side FET 37 and the load side FET 39, that the load side FET 39 has a short-circuit failure therein. Next, after charging the power storage unit 21, the control unit 29 determines a short-circuit failure in the power storage side FET 37 and an open-circuit failure in the power storage side FET 37 and the load side FET 39.
HAMAI HIDEAKI
MITANI YASUSUKE
| JPH09308131A | 1997-11-28 | |||
| JP2005261142A | 2005-09-22 | |||
| JPH0917455A | 1997-01-17 | |||
| JP2007145208A | 2007-06-14 |
Daisuke Nagano
Kentaro Fujii