Patent ID: 7723948

Claim:
A power source system utilizing time detection means to provide optimum charge to a secondary battery from a fuel cell comprising, a fuel cell which generates power by an electromechanical reaction between a fuel and an oxidizing agent, a secondary battery with is charged and discharged, and a charge controller for charging the secondary battery with the power generated by the fuel cell, having an illumination detector for detecting brightness of a surrounding area, a time limit unit, and a microcomputer, wherein the microcomputer has been set at a first mode of charging the secondary battery by the fuel cell at a first charging rate and a first charge ratio when the illumination detector turns on by detecting predetermined illumination and the time limit unit detects the daytime, at a second mode of charging the secondary battery by the fuel cell at a second charging rate which is lower than the first charging rate when the illumination detector turns off by not detecting predetermined illumination and the time limit unit detects the daytime, at a third mode of charging the secondary battery by the fuel cell at a second charge ratio lower than the first charge ratio when the illumination detector turns on and the time limit unit detects the night time, and at a fourth mode of charging the secondary battery by the fuel cell at a third charging rate which is lower than the first charging rate and a third charging ratio which is lower than the first charge ratio when the illumination detector turns off and the time limit unit detects the nighttime.