Patent ID: 9620962
Date: 2017-04-11
CPC Classifications: H02J

Claim:
1. A power supply device configured to be connected to an external power supply and configured to supply electric power to a load, the power supply device comprising: a battery terminal configured to connect to a secondary battery; a superposition unit configured to superpose second electric power output from the secondary battery on first electric power supplied from the external power supply, and to output resultant electric power, including (i) the second electric power output from the secondary battery superposed on (ii) the first electric power supplied from the external power supply, to the load; a power consumption amount retrieve unit including a communication unit to receive an expected power consumption amount from the load; and a controller configured to control an amount of the second electric power to be output from the secondary battery, based on the power consumption amount received by the communication unit, the controller determining whether the power consumption amount can be supplied to the load, and the communication unit transmitting a determination result, by the controller, of whether the power consumption amount can be supplied to the load, wherein the controller provides a control output to the superposition unit to cause the superposition unit to (i) superpose second electric power output from the secondary battery on first electric ewer su lied from the external power supply and output the resultant electric power to the load, and (ii) when an amount of power consumed by the load increases, increase the amount of power supplied from the superposition unit to the load.