Patent 7821225 was granted and assigned to Industrial Technology Research Institute on October, 2010 by the United States Patent and Trademark Office.
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.