ELECTRIC POWER-SUPPLY APPARATUS AND OVER-DISCHARGE CONTROL METHOD FOR USE THEREWITH
First Claim
1. An electric power-supply apparatus comprising:
- a first electric power-supply unit configured to supply electric power to a load using an external power supply;
a second electric power-supply unit configured to be charged with electric power supplied from the first electric power-supply unit and configured to supply electric power to the load using an auxiliary power supply when supply of electric power to the load by the first electric power-supply unit is stopped;
an auxiliary voltage detection unit configured to operate using the electric power supplied from the first electric power-supply unit or the second electric power-supply unit and configured to detect a voltage output by the second electric power-supply unit; and
a switching unit configured to set, when the auxiliary voltage detection unit detects that the voltage output by the second electric power-supply unit has decreased to less than an auxiliary voltage threshold value, the second electric power-supply unit, the load, and the auxiliary voltage detection unit to a disconnected state in which electric power is not supplied from the second electric power-supply unit to the load and the auxiliary voltage detection unit, and configured to set, when the auxiliary voltage detection unit does not detect that the voltage output by the second electric power-supply unit has decreased to less than the auxiliary voltage threshold value, the second electric power-supply unit, the load, and the auxiliary voltage detection unit to a connected state in which electric power is supplied from the second electric power-supply unit to the load and the auxiliary voltage detection unit.
1 Assignment
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Accused Products
Abstract
A method for controlling over-discharge of a secondary battery that is charged with electric power from a main power supply and that supplies electric power to a load when the supply of electric power to the load by the main power supply is stopped is provided. When a battery voltage detection unit detects that the voltage output by the secondary battery has decreased to less than an auxiliary voltage threshold value, a switching unit sets the second electric power-supply unit, the load, and the auxiliary voltage detection unit to a disconnected state in which electric power is not supplied from the second electric power-supply unit to the load and the auxiliary voltage detection unit, and otherwise sets them to a connected state in which electric power is supplied from the secondary battery to the load and the battery voltage detection unit.
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Citations
9 Claims
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1. An electric power-supply apparatus comprising:
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a first electric power-supply unit configured to supply electric power to a load using an external power supply; a second electric power-supply unit configured to be charged with electric power supplied from the first electric power-supply unit and configured to supply electric power to the load using an auxiliary power supply when supply of electric power to the load by the first electric power-supply unit is stopped; an auxiliary voltage detection unit configured to operate using the electric power supplied from the first electric power-supply unit or the second electric power-supply unit and configured to detect a voltage output by the second electric power-supply unit; and a switching unit configured to set, when the auxiliary voltage detection unit detects that the voltage output by the second electric power-supply unit has decreased to less than an auxiliary voltage threshold value, the second electric power-supply unit, the load, and the auxiliary voltage detection unit to a disconnected state in which electric power is not supplied from the second electric power-supply unit to the load and the auxiliary voltage detection unit, and configured to set, when the auxiliary voltage detection unit does not detect that the voltage output by the second electric power-supply unit has decreased to less than the auxiliary voltage threshold value, the second electric power-supply unit, the load, and the auxiliary voltage detection unit to a connected state in which electric power is supplied from the second electric power-supply unit to the load and the auxiliary voltage detection unit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An over-discharge control method for use with an electric power-supply apparatus including a first electric power-supply unit configured to supply electric power to a load using an external power supply, and a second electric power supply unit configured to be charged with electric power from the first electric power supply unit and configured to supply electric power to the load using an auxiliary power supply when supply of electric power to the load by the first electric power supply unit is stopped, the over-discharge control method comprising:
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detecting a voltage output by the second electric power supply unit using an auxiliary voltage detection unit that operates using electric power supplied by the first electric power supply unit or by the second electric power supply unit; and setting, when the auxiliary voltage detection unit detects that the voltage output by the second electric power supply unit has decreased to less than an auxiliary voltage threshold value, the second electric power-supply unit, the load, and the auxiliary voltage detection unit to a disconnected state in which electric power is not supplied from the second electric power-supply unit to the load and the auxiliary voltage detection unit, and setting, when the auxiliary voltage detection unit does not detect that the voltage output by the second electric power supply unit has decreased to less than the auxiliary voltage threshold value, the second electric power-supply unit, the load, and the auxiliary voltage detection unit to a connected state in which electric power is supplied from the second electric power-supply unit to the load and the auxiliary voltage detection unit. - View Dependent Claims (8, 9)
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Specification