| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a relay deposition detecting circuit that is configured to have high impedance. <P>SOLUTION: A relay deposition detecting circuit for detecting deposition of relays RYP, RYN provided in a charge path from an external power source PW to a first battery 14 comprises a second battery 15 that can be supplied with deposition detecting power for detecting deposition independently of the external power source PW, a transistor switch 17 as a circuit in which current flowing from the external power source PW side of the relays is substantially equal to zero and which controls on the basis of a voltage at the external power source PW side of the relays whether the deposition detecting power is supplied to the second battery 15, and a controller 18 which is electrically insulated from the transistor switch 17 and performs detection of deposition on the basis of whether the transistor switch 17 supplies the deposition detecting power. <P>COPYRIGHT: (C)2013,JPO&INPIT |
