Method of charging secondary battery, method of calculating remaining capacity rate of secondary battery, and battery pack
First Claim
1. A method of charging a secondary battery, comprising:
- performing a detection of a charging rate of the secondary battery using an integrating method in which a battery capacity is calculated by integrating a current value or a power value of the secondary battery for a certain period of time, and a detection of the charging rate of the secondary battery using a voltage method in which a voltage value of the secondary battery is measured and the charging rate is calculated based on a correlation between the voltage value and the charging rate; and
performing a weighted addition of the charging rate detected by the integrating method and the charging rate detected by the voltage method in accordance with the charging rate of the secondary battery, whereby detecting a final charging rate.
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Abstract
A method of changing a secondary battery, a method of calculating a remaining capacity rate of the secondary battery, and a battery pack are provided. The method of charging a secondary battery includes the steps of: performing a detection of a charging rate of the secondary battery using an integrating method in which a battery capacity is calculated by integrating a current value or a power value of the secondary battery for a certain period of time, and a detection of the charging rate of the secondary battery using a voltage method in which a voltage value of the secondary battery is measured and the charging rate is calculated based on a correlation between the voltage value and the charging rate; and performing a weighted addition of the charging rate detected by the integrating method and the charging rate detected by the voltage method in accordance with the charging rate of the secondary battery, whereby detecting a final charging rate.
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Citations
14 Claims
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1. A method of charging a secondary battery, comprising:
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performing a detection of a charging rate of the secondary battery using an integrating method in which a battery capacity is calculated by integrating a current value or a power value of the secondary battery for a certain period of time, and a detection of the charging rate of the secondary battery using a voltage method in which a voltage value of the secondary battery is measured and the charging rate is calculated based on a correlation between the voltage value and the charging rate; and
performing a weighted addition of the charging rate detected by the integrating method and the charging rate detected by the voltage method in accordance with the charging rate of the secondary battery, whereby detecting a final charging rate. - View Dependent Claims (2, 3)
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4. A battery pack with a secondary battery, the battery pack comprising:
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a measuring unit operable to measure a voltage and current of the secondary battery; and
a battery capacity calculating unit;
wherein the battery capacity calculating unit includes;
detecting means for detecting a charging rate of the secondary battery using an integrating method in which a battery capacity is calculated by integrating a current value or a power value of the secondary battery for a certain period of time;
detecting means for detecting a charging rate of the secondary battery using a voltage method in which a voltage value of the secondary battery is measured and the charging rate is calculated based on a correlation between the voltage value and the charging rate; and
means for performing a weighted addition of the charging rate detected by the integrating method and the charging rate detected by the voltage method in accordance with the charging rate of the secondary battery, whereby detecting a final charging rate. - View Dependent Claims (5, 6)
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7. A method of detecting a remaining capacity rate of a secondary battery, the method comprising:
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performing a detection of a remaining capacity rate of the secondary battery using an integrating method in which a battery capacity is calculated by integrating a current value or a power value of the secondary battery for a certain period of time;
performing a detection of the remaining capacity rate of the secondary battery using a voltage method in which a voltage value of the secondary battery is measured and the remaining capacity rate is calculated based on a correlation between the voltage value and the remaining capacity rate; and
performing a weighted addition of the remaining capacity rate detected by the integrating method and the remaining capacity rate detected by the voltage method in accordance with the remaining capacity rate of the secondary battery, whereby detecting a final remaining capacity rate. - View Dependent Claims (8, 9)
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10. A battery pack with a secondary battery, comprising:
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a measuring unit operable to measure a voltage, current and temperature of the secondary battery; and
a battery capacity calculating unit;
wherein the battery capacity calculating unit includes;
detecting means for detecting a remaining capacity rate of the secondary battery using an integrating method in which a battery capacity is calculated by integrating a current value or a power value of the secondary battery for a certain period of time;
detecting means for detecting a remaining capacity rate of the secondary battery using a voltage method in which a voltage value of the secondary battery is measured and the remaining capacity rate is calculated based on a correlation between the voltage value and the remaining capacity rate; and
means for performing a weighted addition of the remaining capacity rate detected by the integrating method and the remaining capacity rate detected by the voltage method in accordance with the remaining capacity rate of the secondary battery, whereby detecting a final remaining capacity rate. - View Dependent Claims (11, 12)
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13. A battery pack with a secondary battery, the battery pack comprising:
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a measuring unit operable to measure a voltage and current of the secondary battery; and
a battery capacity calculating unit;
wherein the battery capacity calculating unit includes;
a first detector operable to detect a charging rate of the secondary battery using an integrating method in which a battery capacity is calculated by integrating a current value or a power value of the secondary battery for a certain period of time;
a second detector operable to detect a charging rate of the secondary battery using a voltage method in which a voltage value of the secondary battery is measured and the charging rate is calculated based on a correlation between the voltage value and the charging rate; and
a weighted addition device operable to perform a weighted addition of the charging rate detected by the integrating method and the charging rate detected by the voltage method in accordance with the charging rate of the secondary battery, whereby detecting a final charging rate.
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14. A battery pack with a secondary battery, comprising:
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a measuring unit operable to measure a voltage, current and temperature of the secondary battery; and
a battery capacity calculating unit;
wherein the battery capacity calculating unit includes;
a first detector operable to detect a remaining capacity rate of the secondary battery using an integrating method in which a battery capacity is calculated by integrating a current value or a power value of the secondary battery for a certain period of time;
a second detector operable to detect a remaining capacity rate of the secondary battery using a voltage method in which a voltage value of the secondary battery is measured and the remaining capacity rate is calculated based on a correlation between the voltage value and the remaining capacity rate; and
a weighted addition device operable to perform a weighted addition of the remaining capacity rate detected by the integrating method and the remaining capacity rate detected by the voltage method in accordance with the remaining capacity rate of the secondary battery, whereby detecting a final remaining capacity rate.
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Specification