| 摘要 |
In a power source device having a cell unit, a leak detecting circuit in which a line P and a line N extending from the cell are connected to each other by two P-side voltage dividing resistors and two N-side voltage dividing resistors, and the midpoint between the P-side resistors and N-side resistors is grounded. The line P and the line N are also connected to each other by first to third auxiliary voltage dividing resistors. The midpoint between the first and second auxiliary resistors and the midpoint between the P-side first and second resistors are connected to each other by a P-side voltage comparison circuit. The midpoint between the second and third auxiliary resistors and the midpoint between the N-side first and second resistors are connected to each other by an N-side voltage comparison circuit.
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