Remaining capacity calculation method for secondary battery, and battery pack
First Claim
1. A remaining capacity calculation method for a secondary battery comprising:
- calculating a used electric power by integration of voltage and current measured at a preset time interval when using the secondary battery;
calculating an available dischargeable electric power by subtracting an energy loss and unavailable energy from a discharge electric power of the secondary battery; and
calculating a remaining capacity rate from a ratio between the calculated electric power and the dischargeable electric power.
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Accused Products
Abstract
A remaining capacity calculation method for a secondary battery and a battery pack are provided. Dischargeable electric power is accurately calculated and accuracy of a remaining capacity rate found by an electric power integration method may be improved by providing a remaining capacity calculation method for a secondary battery. The method includes calculating a consumed electric power by way of integration of voltage and current measured at a preset time interval when using the secondary battery; calculating an available dischargeable electric power by subtracting an energy loss and unavailable energy from a discharge electric power of the secondary battery; and calculating a remaining capacity rate from a ratio between the calculated electric power and the dischargeable electric power.
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Citations
7 Claims
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1. A remaining capacity calculation method for a secondary battery comprising:
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calculating a used electric power by integration of voltage and current measured at a preset time interval when using the secondary battery;
calculating an available dischargeable electric power by subtracting an energy loss and unavailable energy from a discharge electric power of the secondary battery; and
calculating a remaining capacity rate from a ratio between the calculated electric power and the dischargeable electric power. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A battery pack of a secondary battery, comprising a measurement unit for measuring voltage and current of the secondary battery, and a remaining capacity calculation unit;
- wherein the remaining capacity calculation unit measures the voltage and current when using the secondary battery at preset time interval, and integrates the used electric power by way of integration of the voltage and the current;
calculates an available dischargeable electric power by subtracting an energy loss and unavailable energy from a discharge electric power of the secondary battery; and
calculates a remaining capacity rate from a ratio between the integrated electric power and the dischargeable electric power.
- wherein the remaining capacity calculation unit measures the voltage and current when using the secondary battery at preset time interval, and integrates the used electric power by way of integration of the voltage and the current;
Specification