In-vehicle control device
An in-vehicle control device ( 10 ) includes a determination unit ( 11 ) that determines whether or not a target contactor ( 21 ) for connecting and disconnecting a high-voltage circuit of a battery ( 2 ) installed in a vehicle is likely to have sticking after the high-voltage circuit is used; and an off control unit ( 12 ) that performs an off control to prohibit current conduction to the target contactor ( 21 ) for a given period of time when the determination unit ( 11 ) determines that the target contactor ( 21 ) is likely to have sticking, whereby attempt to remove a transient short circuiting of the target contactor ( 21 ).
1 . An in-vehicle control device comprising:
a determination unit that determines whether or not a target contactor for connecting and disconnecting a high-voltage circuit of a battery installed in a vehicle is likely to have sticking after the high-voltage circuit is used; and
an off control unit that performs an off control to prohibit current conduction to the target contactor for a given period of time when the determination unit determines that the target contactor is likely to have sticking,
wherein the high-voltage circuit comprises a first contactor interposed on one of positive or negative sides, a second contactor interposed on the other of the positive or negative sides, and a precharge contactor connected in parallel with the first contactor and in series with a resistor,
the vehicle comprises an auxiliary battery that is connected to the battery via each of the first contactor and the second contactor,
the target contactor is the first contactor, and
the off control unit keeps the second contactor and the precharge contactor turned on, and charges the auxiliary battery when a state of charge of the auxiliary battery becomes equal to or lower than a given lower limit value, while the off control is being performed.
2 . The in-vehicle control device according to claim 1 , further comprising
a driving control unit that makes the vehicle ready for driving in response to receiving a start signal requesting the vehicle to start driving,
wherein the off control unit stops the off control in response to receiving the start signal, and
the driving control unit makes the vehicle ready for driving after the off control is stopped and controls the vehicle according to an operation by the user.
3 . The in-vehicle control device according to claim 1 , further comprising
a vibration control unit that performs a vibration control comprising a target vibration control to repeatedly turn on and off the target contactor,
wherein the determination unit determines again whether the target contactor is likely to have sticking or not after the off control unit performs the off control, and
the vibration control unit performs the vibration control when the determination unit determines again that the target contactor is likely to have sticking.