| 摘要 |
<p>In a power supply unit comprising a battery (2) for supplying power to an electric load (6), a current sensor (4) for detecting the current of the battery (2), and a voltage sensor (5) for detecting the voltage of the battery (2), a decision is made that open fault has occurred in the battery (2) if a voltage detected by the voltage sensor (5) is larger than a predetermined first variation and a current detected by the current sensor (4) is smaller than a predetermined second variation, and a decision is made that intermediate fixed fault has occurred in the current sensor (4) if a decision is not made that open fault has occurred in the battery (2) and when the internal resistance of the battery (2) is not lower than a predetermined value.</p> |
