BATTERY RESIDUAL CAPACITANCE CALCULATION DEVICE AND BATTERY RESIDUAL CAPACITANCE CALCULATION METHOD
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Abstract
A residual capacity calculation apparatus for a battery includes: a current detection device to detect a charge/discharge current of the battery; a voltage detection device to detect a terminal voltage of the battery; a first residual capacity calculation unit to calculate a first residual capacity based on an integrated value of the charge/discharge current of the battery; a second residual capacity calculation unit to calculate a second residual capacity based on an open circuit voltage of the battery; a blend rate setting unit to determine a blend rate of the second residual capacity based on a deviation between the first residual capacity and the second residual capacity; and a third residual capacity calculation unit to calculate a post-combination residual capacity by subjecting the first residual capacity and the second residual capacity to weighted combination with use of the blend rate, in which the blend rate setting unit is configured to increase the blend rate as the deviation between the first residual capacity and the second residual capacity increases.
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Citations
8 Claims
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1-4. -4. (canceled)
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5. A residual capacity calculation apparatus for a battery, comprising:
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a current detection device adapted to detect a charge/discharge current of the battery; a voltage detection device adapted to detect a terminal voltage of the battery; a first residual capacity calculation unit adapted to calculate a first residual capacity based on an integrated value of the charge/discharge current of the battery; a second residual capacity calculation unit adapted to calculate a second residual capacity based on an open circuit voltage of the battery; a blend rate setting unit adapted to determine a blend rate of the second residual capacity based on a deviation between the first residual capacity and the second residual capacity; and a third residual capacity calculation unit adapted to calculate a post-combination residual capacity by subjecting the first residual capacity and the second residual capacity to weighted combination with use of the blend rate, wherein the blend rate setting unit is configured to increase the blend rate as the first residual capacity increases relative to the second residual capacity during discharging or as the second residual capacity increases relative to the first residual capacity during charging. - View Dependent Claims (6)
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7. A residual capacity calculation apparatus for a battery, comprising:
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current detection means for detecting a charge/discharge current of the battery; voltage detection means for detecting a terminal voltage of the battery; first residual capacity calculation means for calculating a first residual capacity based on an integrated value of the charge/discharge current of the battery; second residual capacity calculation means for calculating a second residual capacity based on an open circuit voltage of the battery; blend rate setting means for determining a blend rate of the second residual capacity based on a deviation between the first residual capacity and the second residual capacity; and third residual capacity calculation means for calculating a post-combination residual capacity by subjecting the first residual capacity and the second residual capacity to weighted combination with use of the blend rate, wherein the blend rate setting means is configured to increase the blend rate as the first residual capacity increases relative to the second residual capacity during discharging or as the second residual capacity increases relative to the first residual capacity during charging.
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8. A residual capacity calculation method for a battery, the battery comprising current detection device adapted to detect a charge/discharge current of the battery, and voltage detection device adapted to detect a terminal voltage of the battery;
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the residual capacity calculation method comprising; a first residual capacity calculation step of calculating a first residual capacity based on an integrated value of the charge/discharge current of the battery; a second residual capacity calculation step of calculating a second residual capacity based on an open circuit voltage of the battery; a step of setting a blend rate larger as the first residual capacity increases relative to the second residual capacity during discharging or as the second residual capacity increases relative to the first residual capacity during charging; and a third residual capacity calculation step of calculating a post-combination residual capacity by subjecting the first residual capacity and the second residual capacity to weighted combination with use of the blend rate.
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Specification