To precisely detect adherence abnormality when a plurality of temperature sensors are used for monitoring of a battery.
The power supply unit 1 comprises a battery pack for containing a plurality of battery jars 14.0-14.m-1, a plurality of the temperature sensors 12.0-12.m-1 for detecting temperatures of a plurality of the battery jars 14.0-14.m-1 respectively, a current sensor 16 for detecting a current flowing in the battery pack, and a status monitor 6 and an abnormality detecting device 8 of a detecting portion for detecting the abnormality of a plurality of the temperature sensors 12.0-12.m-1. In the detecting portion, charge and discharge are performed in the battery pack, and then the abnormality is reported when the case that a deviation in output values of a plurality of the temperature sensors at a judgment time is larger than a predetermined first value and also a fluctuation range of each of a plurality of the temperature sensors is less smaller than a predetermined second value is detected a plurality of times.
| JP2003149054A | 2003-05-21 | |||
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| JPH04364431A | 1992-12-16 | |||
| JPH11351976A | 1999-12-24 | |||
| JPH11237286A | 1999-08-31 | |||
| JPS63277720A | 1988-11-15 | |||
| JP2003254839A | 2003-09-10 |
Toshio Morita
Takao Matsuyama
Tadashi Muto