Power supply control device
AssigneesAutonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
InventorsShunichi Sawano, Masayuki Kato, Shinnosuke Nakaguchi
Life of this patent
Estimating the term…
Abstract
In a power supply control device, a temperature calculation circuit calculates a wire temperature of a wire based on the current value of a current flowing through the wire. If the wire temperature calculated by the temperature calculation circuit is lower than a temperature threshold value, a drive unit switches on or off a switch in accordance with content indicated by a control signal output by a communication unit. When the wire temperature calculated by the temperature calculation circuit rises to the temperature threshold value or higher, the drive unit switches off the switch independently of content indicated by a control signal output by the communication unit.
Claims5
A power supply control device for supplying electrical power to a load, the power supply control device includes a switching unit that switches on or off a switch disposed on a wire connecting the power supply control device to the load, comprising:
- an output unit that outputs a control signal indicating whether the switch is to be on or off;
- and
- a first temperature calculation unit that calculates a wire temperature of the wire based on a current value of a current flowing through the wire, the first temperature calculation unit interposed between the output unit and the switch,
- wherein, if the wire temperature calculated by the first temperature calculation unit is lower than a temperature threshold value, the switching unit switches on or off the switch in accordance with content indicated by the control signal output by the output unit, and
- if the wire temperature calculated by the first temperature calculation unit is higher than or equal to the temperature threshold value, the switching unit switches off the switch independently of the content indicated by the control signal output by the output unit.
Dependencies are inferred from the claim text.