| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a relay contact welding detection circuit that can detect welding of the relay contact, while controlling the increase of the number of parts, and to provide a vehicle and a relay contact welding detection method. <P>SOLUTION: In the vehicle 100, the welding detection of relays RX1, RY2 and RY3 of a receipt part separation relay device RX1, and relays RY6, RY7 and RY8 of a motor part separation relay device RX2 is performed by using an existing voltage sensor 21 for the charge control or a voltage sensor 11 for step-up control. The voltage that is PWM controlled and stepped down by an inverter 20 is applied to the relays RY1-RY6 each. The welding detection of relay contact can be made without adding new components by detecting the fluctuation of the voltage applied to each of the relays RY1-RY6 OFF controlled among the relays R1-R6 by a voltage sensor 21 for charge control or a voltage sensor 11 for step-up control that locates the other side of the inverter 20. <P>COPYRIGHT: (C)2013,JPO&INPIT |
