Battery pack, charging system, and method for charging battery pack
AssigneeFdk Corporation
InventorsYasunari Mizoguchi, Yusuke Kusagaya
Life of this patent
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Abstract
A battery pack is provided in which the battery pack itself can recognize a determination of a full charge, which is made by a charger, without using a communication line. A battery pack is provided with a secondary battery, current measurement means for measuring a charging current for charging the secondary battery, and a control circuit which receives an output signal from the current measurement means. The control circuit determines that the secondary battery is fully charged when a reduction rate of the charging current in a unit time exceeds a predetermined value.
Claims8
A battery pack comprising:
- a secondary battery;
- current measurement means for measuring a charging current for charging the secondary battery;
- and
- a control circuit that receives an output signal from the current measurement means,
- wherein the control circuit determines that the secondary battery is fully charged when a reduction rate of the charging current in a unit time exceeds a predetermined value.
A method for charging a battery pack provided with a secondary battery, current measurement means for measuring a charging current for charging the secondary battery, and a control circuit which receives an output signal of the current measurement means, the method comprising:
- determining, by the control circuit, that the secondary battery is fully charged when a reduction rate of the charging current in a unit time exceeds a predetermined value.
Dependencies are inferred from the claim text.