Patent ID: 7023107

Claim:
A power circuit for a battery, comprising: a first energy storage source; a second energy storage source connected in series with the first energy storage source, the second energy storage source having an allowable input current larger than an allowable input current of the first energy storage source; an electric power conversion circuit for converting electric power between an electric motor which is connected to an axle of a vehicle and the first energy storage source and the second energy storage source; a DC/DC converter for converting electric power between the first energy storage source and the second energy storage source; and control means for controlling the DC/DC converter, wherein the control means includes DC/DC converter control means for, when regenerative electric power generated by the electric motor charges the first energy storage source and the second energy storage source through the electric power conversion circuit, controlling the DC/DC converter so that an input current to the first energy storage source does not exceed the allowable input current of the first energy storage source.