Control device
A control device for controlling a power supply system including a DC-to-DC converter that supplies power of a power supply source to a load, an alternator that is connected in parallel with DC-to-DC converter so as to be capable of supplying power generated by rotation of the engine to the load, and a battery that is connected to the load so as to be capable of supplying power, the control device comprising: an acquisition unit that acquires information regarding a current of the battery; and a control unit that controls an operation of the engine and the alternator based on the information, wherein the control unit prohibits stopping of the engine in operation when the battery is in a discharging state for outputting a current to the load.
1 . A control device that controls a power supply system, the power supply system including a DC-to-DC converter that supplies electric power of a power supply source to a load, an alternator connected with the DC-to-DC converter in such a manner that the alternator is able to supply electric power generated by rotation of an engine to the load, and a battery connected to the load in such a manner that the battery is able to supply electric power to the load, the control device comprising a processor configured to:
acquire battery current information, the battery current information indicating a magnitude of current supplied from the battery; and
control an operation of the engine and an operation of the alternator based on the battery current information, wherein the processor is further configured to:
perform a first determination as to whether the battery is in a discharging state, in which the battery outputs a current to the load, based on the battery current information; and
in response to the first determination that the battery is in the discharging state, prohibit the engine that is running from being stopped.
2 . The control device according to claim 1 , wherein:
the battery current information includes information on an incoming current and an outgoing current of the battery;
the battery current information is acquired sequentially;
the first determination that the battery is in the discharging state is based on a cumulative value of the incoming current and the outgoing current from a predetermined time point up to current.
3 . The control device according to claim 1 , wherein the processor is further configured to:
in response to the first determination that the battery is in the discharging state, start power generation by the alternator;
after the alternator generates electric power for a first time period, stop the power generation by the alternator, and perform a second determination as to whether the battery is in the discharging state based on the battery current information; and
in response to the second determination that the battery is not in the discharging state, control the engine to allow the engine to be stopped.
4 . The control device according to claim 3 , wherein:
the battery current information includes information on an incoming current and an outgoing current of the battery;
the battery current information is acquired sequentially;
in a case where a cumulative value of the incoming current and the outgoing current of the battery during the first time period is equal to or larger than a predetermined threshold, the processor is configured to determine that the battery is not in the discharging state in the second determination.
5 . The control device according to claim 1 , wherein the processor is configured to prohibit the engine that is running from being stopped by setting a predetermined prohibition flag to ON.
6 . The control device according to claim 3 , wherein the processor is configured to control the engine that is running to allow the engine to be stopped by setting a predetermined prohibition flag to OFF.
7 . The control device according to claim 1 , wherein:
the battery current information includes information on a current incoming current and a current outgoing current of the battery; and
the first determination that the battery is in the discharging state is based on the current incoming current and the current outgoing current of the battery.