| 摘要 |
PROBLEM TO BE SOLVED: To provide a voltage detecting device for a combined battery which can improve circuit protectiveness, without making a voltage measurement time longer. SOLUTION: A 1st initial-stage amplifier 4 and a 2nd initial-stage amplifier 5, which have low impedance are arranged between multiplexers 2 and 3 which select and output potentials of electrical cells 11 to 15 in the order and a capacitor 6. Voltage follower circuits 4 and 5 output electric-cell voltages, inputted from the multiplexers 2 and 3 to the capacitor 6 having low-output impedance. Consequently, even if internal resistances of analog switches SW1 to SW6 and resistance values of current-limiting resistances R1 to R6 inserted in series with the analog switches SW1 to SW6 being large, measurements can be taken quickly, and the safety of the circuit is improved. |
