| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce an increasing width of a detection time of a voltage of a battery module. <P>SOLUTION: In the voltage detection device 20 with a differential amplifier DA with an input terminal comprising a noninverting input terminal (+) and an inverting input terminal (-), and a series circuit pair which is a pair of series circuits of switches S1, S2, etc., and resistors R1, R2, etc., connected between both ends of each battery module and both ends of the input terminal, the ON-time of a switch pair S3, S4 to be switched on next is overlapped on the ON-time of a switch pair S1, S2 which is a switch pair constituting a series circuit pair of a prescribed number. In this case, if some of the switches S1, S2, S3, S4 is open-failed, a potential difference between the input terminals of the differential amplifier is fluctuated greatly. <P>COPYRIGHT: (C)2009,JPO&INPIT |
