Power supply device
AssigneeSumitomo Heavy Industries, Ltd.
InventorKazuhiro Hirata
Life of this patent
Estimating the term…
Abstract
A power supply device includes an input terminal to which an electric power is supplied from a commercial power source; an output terminal connected to an electric load; a power storage device to be charged by the electric power supplied from the input terminal and supplying the electric power to the output terminal; a primary battery; and a controller supplying an output of the primary battery to the output terminal, when monitoring a voltage of the commercial power source, which is applied to the input terminal, and a charged state of the power storage device, and detecting that the voltage of the commercial power source falls to a specified voltage value or less and the charged state of the power storage device indicates a specified value or less.
Claims6
A power supply device comprising:
- an input terminal to which an electric power is supplied from a commercial power source;
- an output terminal connected to an electric load;
- an electric power transmission circuit which is connected between the input terminal and the output terminal;
- a power storage device which is connected to the electric power transmission circuit and is charged by the electric power supplied from the input terminal;
- a metal-air battery which is connected to the electric power transmission circuit and is maintained in a standby state where a material of an electrolytic solution is separated from a negative electrode active material of the metal-air battery;
- a tank accumulating a material of the electrolytic solution separated from the negative electrode active material, the tank being connected to the metal-air battery via a valve;
- and a controller which controls the valve to supply the material of the electrolytic solution accumulated in the tank into the metal-air battery when a normal power supply from the commercial power source is stopped,
- wherein the metal-air battery is connected to the electric power transmission circuit via a switching element, and wherein the controller switches on the switching element when the controller detects that the voltage across the terminals of the metal-air battery reaches the rated open circuit voltage after supplying the material of the electrolytic solution into the metal-air battery.
Dependencies are inferred from the claim text.