Patent ID: 9590451
Date: 2017-03-07
CPC Classifications: H02J

Claim:
1. An autonomous power supply system for supplying electric power generated by a power generation element to a loading device, comprising: a generation control circuit which controls power generation efficiency of the power generation element; a storage element group which charges the electric power generated by the power generation element; and a charging control circuit which controls a charging operation and a discharging operation of the storage element group, wherein the storage element group includes a primary storage element for supplying electric power to the generation control circuit and the charging control circuit, and a secondary storage element for supplying electric power to the loading device; and the primary storage element is first charged with the electric power generated by the power generation element until a voltage of the primary storage element reaches a first predetermined threshold value, and when the first predetermined threshold value is reached, the secondary storage element is subsequently charged by charge supplied from the primary storage element until the voltage of the primary storage element reaches a second predetermined threshold value.