| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated voltage detection device which detects voltages from a plurality of voltage sources respectively and highly accurately in a short period of time with few switch control signals. SOLUTION: Analog switches T1-T5 for reading are put into the cut-off state respectively and analog switches S1-S5 for charging are put into the connection state respectively, and thereby when capacitors C1-C4 are charged by corresponding unit batteries E1-E4, respectively, the analog switches S1-S5 for charging are put into the cut-off states respectively, and each voltage of the capacitors C1-C4 is held, and the analog switches T1-T5 for reading are put into the connection states respectively in this state, and each potential of specific terminals A2-A5 in a series capacitor circuit 1 is measured by A/D converters A/D1-A/D4. A voltage of the unit battery E1 is detected by the potential acquired by the A/D converter A/D1, and each voltage of the unit batteries E2-E4 is detected from each difference between each potential acquired by the A/D converters A/D2-A/D4 and each potential acquired by the A/D converters A/D1-A/D3. COPYRIGHT: (C)2008,JPO&INPIT
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