Battery charging method with mutiple constant voltages and battery charging apparatus employing the same
AssigneeSamsung SDI Co., Ltd.
InventorsYoohong Jang, Seungyeon Kang, Hoyul Baek, Hyunju Oh, Jake Kim
Life of this patent
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Abstract
A method of charging a battery, wherein the battery comprises a plurality of battery cells, includes charging the battery with a first voltage for a first time period, which charging is first charging, charging the battery with a second voltage for a second time period, which charging is second charging, and charging the battery with a third voltage for a third time period, which charging is third charging, wherein lengths of the first to third time periods are determined in correspondence with a magnitude of charging current of the battery.
Claims10
A method of charging a battery, wherein the battery comprises a plurality of battery cells, the method comprising:
- determining magnitudes of a first voltage, a second voltage, and a third voltage, wherein the determining of the magnitudes of the first, second and third voltages, comprises determining the magnitudes of the first to third voltages as voltage values, each of the voltage values corresponding to a peak point in a temporal variation curve of internal resistance, against voltage, of the battery;
- charging the battery with the first voltage for a first time period, which constitutes a first charging period;
- charging the battery with the second voltage for a second time period, which constitutes a second charging period;
- and
- charging the battery with the third voltage for a third time period, which constitutes a third charging period,
- wherein lengths of the first to third time periods are determined in correspondence with a magnitude of charging current of the battery.
A battery charging apparatus for a battery, wherein the battery comprises a plurality of battery cells, the battery charging apparatus comprising:
- a memory configured to store information about magnitudes of a first voltage, a second voltage, and a third voltage that are charging voltages for charging the battery,
- wherein the battery is charged with the first voltage, the second voltage, and the third voltage respectively within a first time period, a second time period, and a third time period, and lengths of the first to third time periods correspond with a magnitude of charging current of the battery, and wherein magnitudes of the first to third voltages are voltage values, each of the voltage values corresponding to a peak point in a temporal variation curve of internal resistance, against voltage, of the battery.
Dependencies are inferred from the claim text.