Device and method for estimating the inputtable/outputtable power of a secondary battery
First Claim
1. A power estimating device for estimating a power associated with a secondary battery, the power comprising at least one of an inputtable power to charge the battery and an outputtable power discharged from the battery, the device comprising:
- a controller including;
a maximum possible current estimating part operable to estimate a maximum possible current through the secondary battery when the terminal voltage of the secondary battery reaches one of an upper limit voltage when the secondary battery is charged continuously for a first period of time and a lower limit voltage when the secondary battery is discharged continuously for a second period of time; and
a power estimating part operable to estimate the power based on the maximum possible current and the one of the upper limit voltage and the lower limit voltage.
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Accused Products
Abstract
An inputtable/outputtable power estimating device and method that can correctly estimate maximum inputtable and/or outputtable power of a secondary battery that can continue for a prescribed period of time. When the secondary battery is continuously charged or discharged for a prescribed period of time, the estimated value of a maximum possible charge and/or discharge current is estimated such that the terminal voltage of the secondary battery reaches a predetermined upper limit voltage or lower limit voltage. The inputtable and/or outputtable power is estimated as the power that can be used to charge the secondary battery or be discharged from it on the basis of the estimated maximum possible current(s) and the respective upper limit voltage or lower limit voltage.
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Citations
20 Claims
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1. A power estimating device for estimating a power associated with a secondary battery, the power comprising at least one of an inputtable power to charge the battery and an outputtable power discharged from the battery, the device comprising:
a controller including;
a maximum possible current estimating part operable to estimate a maximum possible current through the secondary battery when the terminal voltage of the secondary battery reaches one of an upper limit voltage when the secondary battery is charged continuously for a first period of time and a lower limit voltage when the secondary battery is discharged continuously for a second period of time; and
a power estimating part operable to estimate the power based on the maximum possible current and the one of the upper limit voltage and the lower limit voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A power estimating device that estimates at least one of a inputtable and a outputtable power of a secondary battery, comprising:
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current estimating means for estimating at least one of a maximum possible charge current when a terminal voltage of the secondary battery reaches an upper limit voltage when the secondary battery is continuously charged for a first period of time, and a maximum possible discharge current when the terminal voltage of the secondary battery reaches a lower limit voltage when the secondary battery is continuously discharged for a second period of time; and
power estimating means for estimating at least one of the inputtable power based on the maximum possible charge current, and the upper limit voltage and the outputtable power based on the maximum possible discharge current and the lower limit voltage. - View Dependent Claims (14, 15, 16)
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17. A power estimating method for estimating a power of a secondary battery, the power representing at least one of a charge power and a discharge power of a secondary battery, the method comprising:
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estimating a maximum possible current when a terminal voltage of the secondary battery reaches an upper limit voltage when the secondary battery is continuously charged for a first period of time, or a lower limit voltage when the secondary battery is continuously discharged for a second period of time, wherein the maximum possible current is one of a maximum possible charging current and a maximum possible discharging current; and
estimating the charge power based on the maximum possible charging current and the upper limit voltage, or the discharge power based on the maximum possible discharging current and the lower limit voltage. - View Dependent Claims (18, 19, 20)
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Specification