Power supply device
First Claim
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1. A power supply device for supplying power to a load by combining a rechargeable battery and a capacitor, comprising:
- a first DC-DC converter connected between the capacitor and the load and configured to enable a voltage of the capacitor to be stepped up and supplied to the load;
a bypass switch enabling power to be directly supplied to the load from the capacitor by bypassing the first DC-DC converter when switched to a connected state; and
a controller configured to control the first DC-DC converter and a connecting state of the bypass switch;
wherein the rechargeable battery is connected to the load without going through the first DC-DC converter; and
wherein the controller is configured to;
switch the bypass switch to the connected state to directly supply power to the load from the capacitor when a voltage of the capacitor is a voltage capable of driving the load,control the first DC-DC converter to step up the voltage of the capacitor to supply power to the load when the voltage of the capacitor drops below a minimum voltage capable of driving the load, andswitch the bypass switch to the connected state to directly supply a regenerative power to the rechargeable battery from the load when the voltage of the capacitor drops below the minimum voltage capable of driving the load.
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Abstract
A power supply device for supplying power to a load by combining a secondary battery and a capacitor includes a bypass switch which enables power to be directly supplied to the load from the capacitor by being switched to a connected state when a voltage of the capacitor is a voltage capable of driving the load, and a first DC-DC converter which enables the voltage of the capacitor to be stepped up and supplied to the load when the voltage of the capacitor drops below a minimum voltage capable of driving the load.
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Citations
10 Claims
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1. A power supply device for supplying power to a load by combining a rechargeable battery and a capacitor, comprising:
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a first DC-DC converter connected between the capacitor and the load and configured to enable a voltage of the capacitor to be stepped up and supplied to the load; a bypass switch enabling power to be directly supplied to the load from the capacitor by bypassing the first DC-DC converter when switched to a connected state; and a controller configured to control the first DC-DC converter and a connecting state of the bypass switch; wherein the rechargeable battery is connected to the load without going through the first DC-DC converter; and wherein the controller is configured to; switch the bypass switch to the connected state to directly supply power to the load from the capacitor when a voltage of the capacitor is a voltage capable of driving the load, control the first DC-DC converter to step up the voltage of the capacitor to supply power to the load when the voltage of the capacitor drops below a minimum voltage capable of driving the load, and switch the bypass switch to the connected state to directly supply a regenerative power to the rechargeable battery from the load when the voltage of the capacitor drops below the minimum voltage capable of driving the load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification