Back to results
US 7,821,225 B2Granted
Hybrid power supply and power management method thereof
AssigneeIndustrial Technology Research Institute
InventorsYuh-Fwu Chou, Chiou-Chu Lai, Sheng-Yong Shen
Life of this patent
Estimating the term…
Abstract
The invention provides a power management method for a hybrid power supply, comprising providing a primary power source, providing a rechargeable battery, providing a DC-DC converter, acquiring an amount of the power stored in the rechargeable battery, and when the energy level of the rechargeable battery does not exceed a first predetermined value, the DC-DC converter controls the primary power source to output a first value of a first electrical parameter.
Claims17
A power management method for a hybrid power supply, comprising:
- providing a rechargeable battery;
- providing a fuel cell;
- providing a DC-DC converter directly connected to the fuel cell;
- providing a control unit;
- acquiring an amount of energy stored in the rechargeable battery to determine an energy level of the rechargeable battery;
- when the energy level of the rechargeable battery does not exceed a first predetermined value, controlling the fuel cell to output a first voltage to the DC-DC converter;
- and
- controlling the DC-DC converter to output a second voltage to the rechargeable battery when the energy level of the rechargeable battery is equal to or exceeds a second predetermined value,
- wherein when the energy level of the rechargeable battery is between the first predetermined value and the second predetermined value, the control unit controls the fuel cell to increase the voltage output of the fuel cell to the DC-DC converter according to the increasing energy level of the rechargeable battery.
6 more elements
A hybrid power supply device, comprising:
- a fuel cell having an energy output terminal;
- a rechargeable battery having an energy input/output terminal;
- a control unit acquiring an electrical state of the fuel cell and an energy level of the rechargeable battery to output a control signal;
- and
- a DC-DC converter having a first input terminal directly connected to the energy output terminal of the fuel cell, a first output terminal coupled to the energy input terminal of the rechargeable battery, a control terminal receiving the control signal from the control unit, wherein when the energy level of the rechargeable battery does not exceed a first predetermined value, the control unit controls the fuel cell to output a first voltage to the first input terminal of DC/DC converter, and when the energy level of the rechargeable battery is equal to or exceeds a second predetermined value, the control unit controls the DC-DC converter to output a second voltage to the rechargeable battery,
- wherein when the energy level of the rechargeable battery is between the first predetermined value and the second predetermined value, the control units generates the control signal to control the fuel cell to increase the voltage output of the fuel cell to the DC-DC converter according to the increasing energy level of the rechargeable battery.
3 more elements
A hybrid power supply device, comprising:
- a fuel cell;
- an input measurement unit electrically connected to the fuel cell to output a first signal according to the voltage of the primary power source;
- a rechargeable battery having one or a plurality of secondary cell units;
- an output measurement unit electrically connected to the rechargeable battery to output a second signal according to the energy level of the rechargeable battery;
- a control unit receiving the first signal and the second signal to output a third signal, wherein the third signal is one of the first and the second signals;
- and
- a DC-DC converter directly and electrically connected to the fuel cell and the rechargeable battery, wherein the DC-DC converter receives an input voltage from the fuel cell and an output voltage of the DC-DC converter is adjusted based on the third signal;
- when the energy level of the rechargeable battery does not exceed a first predetermined value, the DC-DC converter controls the fuel cell to output a first voltage based on the third signal, when the energy level of the rechargeable battery exceeds a second predetermined value, the DC-DC converter outputs a second voltage based on the third signal,
- wherein when the energy level of the rechargeable battery is between the first predetermined value and the second predetermined value, the third signal controls the DC-DC converter to increase the voltage output of the fuel cell to the DC-DC converter.
6 more elements
Dependencies are inferred from the claim text.