Power circuit for battery
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTatsuya Okuda, Takahiro Urakabe
Life of this patent
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Abstract
A power circuit for a battery for, even when an idle-stop operation is continuously performed, preventing reduction of an electric power supplied to a motor at start-up to obtain a set engine rpm. The power circuit includes a series-connected power supply in which a battery having a load and a capacitor group are connected in series with each other, a DC/DC converter for shifting electric power between the battery and the capacitor group, and between the battery and the load, and a controller for controlling the DC/DC converter. The controller detects the voltage of the capacitor group, and when the voltage detected is lower than a first threshold voltage, controls the DC/DC converter so that the capacitor group is charged with electricity.
Claims6
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.
Dependencies are inferred from the claim text.