In-vehicle backup power supply control device and in-vehicle backup power supply
Provided is an in-vehicle backup power supply control device or an in-vehicle backup power supply configured to generate a notification indicating the state of a power storage unit to an external device. When a main power supply fails, a control device applies a voltage to a backup target load from a power storage unit. The control device is provided with a charging/discharging unit for charging the power storage unit and discharging the power storage unit, a voltage detection unit for detecting a voltage of the power storage unit, a control unit for controlling the operation of the charging/discharging unit, and a signal interruption unit for interrupting the output of the predetermined signal to a device external to the control device in a case where the voltage value (Vout) of the power storage unit detected by the voltage detection unit is smaller than a predetermined first threshold.
1. An in-vehicle backup power supply control device for performing control, in an in-vehicle power supply system provided with a main power supply and a power storage unit, such that the power storage unit supplies power to a backup target load in a case where the main power supply fails, the in-vehicle backup power supply control device comprising:
a charging/discharging unit configured to charge and discharge the power storage unit;
a voltage detection unit configured to detect a charging voltage of the power storage unit;
a control unit configured to output a predetermined signal to a device external to the control device; and
a signal interruption unit configured to interrupt the output of the predetermined signal to the device external to the control device in a case where the charging voltage detected by the voltage detection unit is smaller than a predetermined threshold.
2. The in-vehicle backup power supply control device according to claim 1 , wherein the control unit outputs, to the external device, a signal indicating that the control unit is in a normal state, as the predetermined signal.
3. An in-vehicle backup power supply comprising:
the in-vehicle backup power supply control device according to claim 1 , and
the power storage unit.
4. The in-vehicle backup power supply as set forth in claim 3 , wherein the control unit outputs, to the external device, a signal indicating that the control unit is in a normal state, as the predetermined signal.
5. An in-vehicle backup power supply control device for performing control, in an in-vehicle power supply system provided with a main power supply and a power storage unit, such that the power storage unit supplies power to a backup target load in a case where the main power supply fails, the in-vehicle backup power supply control device comprising:
a charging/discharging unit configured to charge and discharge the power storage unit;
a voltage detection unit configured to detect a charging voltage of the power storage unit;
a current detection unit configured to detect a value of a current that flows to the power storage unit or a current that flows from the power storage unit;
a control unit configured to output a predetermined signal to a device external to the control device; and
a signal interruption unit configured to interrupt the output of the predetermined signal to the device external to the control device in a case where the charging voltage detected by the voltage detection unit is smaller than a predetermined threshold and the current value detected by the current detection unit is smaller than a predetermined current threshold.
6. The in-vehicle backup power supply control device according to claim 5 , wherein the control unit outputs, to the external device, a signal indicating that the control unit is in a normal state, as the predetermined signal.
7. An in-vehicle backup power supply comprising:
the in-vehicle backup power supply control device according to claim 5 , and
the power storage unit.
8. The in-vehicle backup power supply as set forth in claim 7 , wherein the control unit outputs, to the external device, a signal indicating that the control unit is in a normal state, as the predetermined signal.