Patent ID: 8683235
Filing Date: 2014-03-25
Classification: H02J

Abstract:
1. A server device, comprising: a server component including a CPU that consumes electrical power, a memory and a hard disk; a power supply unit that supplies electrical power from a commercial power source to the server component; a secondary battery to be charged with electrical power supplied from the power supply unit; a first switch connected to a power supply channel from the power supply unit to the server component; a second switch connected to a charging power supply channel from the power supply unit to the secondary battery; a third switch connected to a power supply channel from the secondary battery to the server component; a power source control device connected to the server component, the power supply unit, the secondary battery, the first switch, the second switch and the third switch, and wherein the power source control device which, in a state where the first switch is on and the third switch is off, when power consumption of the server component exceeds a first threshold, if remaining capacity of the secondary battery exceeds a second threshold, turns on the third switch; whereas if the remaining capacity of the secondary battery is not more than the second threshold, in a case of charging the secondary battery is not performed, switches operation of the power supply unit to a first low power consuming operation in which a maximum power consumption of the server component is not more than a maximum available power supply of the power supply unit and turns off the second switch, and whereas in a case of charging the secondary battery is performed, switches operation of the power supply unit to a second low power consuming operation in which a maximum power consumption of the server component is not more than a value obtained by deducting a predetermined amount of power for charging the secondary battery from the maximum available power supply of the power supply unit, and turns on the second switch.