Patent ID: 6781343
Filing Date: 2004-08-24
Classification: B60L,H01M,H02J,Y02E,Y02T

Abstract:
A hybrid power supply device which is provided with a fuel battery and a secondary battery consisting of a plurality of unit secondary batteries connected in series,the secondary battery being charged by the fuel battery and electric power being supplied from the secondary battery to a load, wherein the fuel battery is divided into a plurality of unit fuel batteries, each unit fuel battery consisting of a predetermined number of cells, and each hybrid power supply is constituted by connecting each unit fuel battery with each unit secondary battery in parallel to each other, and wherein said hybrid power supply device is further provided with: each charging switch for connecting or disconnecting the unit secondary battery with/from the unit fuel battery in each unit hybrid power supply; each residual capacity detecting means for detecting the residual capacity of each unit secondary battery; and charging control means for controlling the charging switch independently for each unit hybrid power supply on the basis of the residual capacity of each unit secondary battery to perform charging of the unit secondary battery by the unit fuel battery.