Patent ID: 9014866
Filing Date: 2015-04-21
Classification: G05B,G05F,G06F,H01M,H02J,H04L,Y02E,Y04S

Abstract:
1. A power supply device comprising: (a) a power supply unit group composed of a plurality of power supply units and connected with a power consuming appliance; and (b) a control device configured to control the power supply unit group, wherein the control device and each of the power supply units are connected to each other by a communicating circuit, wherein when a power supply unit is removed from the power supply unit group, the control device updates a cryptographic key shared to perform communication between the control device and each of the power supply units, wherein when the power supply unit is returned to the power supply unit group, the control device checks whether the power supply unit returned to the power supply unit group is the power supply unit removed from the power supply unit group, and when the power supply unit returned to the power supply unit group is the power supply unit removed from the power supply unit group, the control device sends the cryptographic key to the power supply unit returned to the power supply unit group, and wherein when a power supply unit that is not the power supply unit removed from the power supply unit group is incorporated into the power supply unit group, the control device checks whether the power supply unit that is not the power supply unit removed from the power supply unit group is an authorized or an unauthorized power supply unit, wherein, when the power supply unit that is not the power supply unit removed from the power supply unit group is an authorized power supply unit, the control device sends the cryptographic key to the power supply unit that is not the power supply unit removed from the power supply unit group, and when the power supply unit that is not the power supply unit removed from the power supply unit group is an unauthorized power supply unit, the control device does not send the cryptographic key to the power supply unit that is not the power supply unit removed from the power supply unit group and blocks communication between the control device and the power supply unit that is not the power supply unit removed from the power supply unit group.