BATTERY REMAINING-LIFE ESTIMATION APPARATUS, BATTERY PACK, CAPACITOR, ELECTRIC VEHICLE, AND BATTERY REMAINING-LIFE ESTIMATION METHOD
First Claim
1. A battery remaining-life estimation apparatus, comprising:
- a memory configured to store information about a polarization-voltage curve of a secondary battery, the information being stored with a correlation with a current value and a temperature of the secondary battery; and
a circuit configured to estimate a remaining power of the secondary battery, the remaining power being estimated based on a discharge curve of the secondary battery, andthe circuitobtaining the polarization-voltage curve based on the information in the memory, the polarization-voltage curve being correlated with the current value and the temperature of the secondary battery, andestimating the discharge curve by subtracting the obtained polarization-voltage curve from an open-circuit voltage curve obtained for the secondary battery.
3 Assignments
0 Petitions
Accused Products
Abstract
There is provided a battery remaining-life estimation apparatus that includes a memory, and a circuit. The memory is configured to store information about a polarization-voltage curve of a secondary battery, the information being stored with a correlation with a current value and a temperature of the secondary battery. The circuit is configured to estimate a remaining power of the secondary battery, the remaining power being estimated based on a discharge curve of the secondary battery. The circuit obtains the polarization-voltage curve based on the information in the memory, the polarization-voltage curve being correlated with the current value and the temperature of the secondary battery. The circuit also estimates the discharge curve by subtracting the obtained polarization-voltage curve from an open-circuit voltage curve obtained for the secondary battery.
-
Citations
13 Claims
-
1. A battery remaining-life estimation apparatus, comprising:
-
a memory configured to store information about a polarization-voltage curve of a secondary battery, the information being stored with a correlation with a current value and a temperature of the secondary battery; and a circuit configured to estimate a remaining power of the secondary battery, the remaining power being estimated based on a discharge curve of the secondary battery, and the circuit obtaining the polarization-voltage curve based on the information in the memory, the polarization-voltage curve being correlated with the current value and the temperature of the secondary battery, and estimating the discharge curve by subtracting the obtained polarization-voltage curve from an open-circuit voltage curve obtained for the secondary battery. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A battery pack, comprising:
-
a secondary battery; and a battery remaining-life estimation apparatus including a memory configured to store information about a polarization-voltage curve of the secondary battery, the information being stored with a correlation with a current value and a temperature of the secondary battery, and a circuit configured to estimate a remaining power of the secondary battery, the remaining power being estimated based on a discharge curve of the secondary battery, and the circuit obtaining the polarization-voltage curve based on the information in the memory, the polarization-voltage curve being correlated with the current value and the temperature of the secondary battery, and estimating the discharge curve by subtracting the obtained polarization-voltage curve from an open-circuit voltage curve obtained for the secondary battery.
-
-
9. A capacitor, comprising:
-
a secondary battery; and a battery remaining-life estimation apparatus including a memory configured to store information about a polarization-voltage curve of the secondary battery, the information being stored with a correlation with a current value and a temperature of the secondary battery, and a circuit configured to estimate a remaining power of the secondary battery, the remaining power being estimated based on a discharge curve of the secondary battery, and the circuit obtaining the polarization-voltage curve based on the information in the memory, the polarization-voltage curve being correlated with the current value and the temperature of the secondary battery, estimating the discharge curve by subtracting the obtained polarization-voltage curve from an open-circuit voltage curve obtained for the secondary battery, and supplying a power to a connected power consumption device.
-
-
10. An electric vehicle, comprising:
-
a secondary battery; a battery remaining-life estimation apparatus including a memory configured to store information about a polarization-voltage curve of the secondary battery, the information being stored with a correlation with a current value and a temperature of the secondary battery, and a circuit configured to estimate a remaining power of the secondary battery, the remaining power being estimated based on a discharge curve of the secondary battery; and a transducer configured to convert a power into a driving force for the vehicle, the power being supplied from the secondary battery, and the circuit obtaining the polarization-voltage curve based on the information in the memory, the polarization-voltage curve being correlated with the current value and the temperature of the secondary battery, and estimating the discharge curve by subtracting the obtained polarization-voltage curve from an open-circuit voltage curve obtained for the secondary battery.
-
-
11. A battery remaining-life estimation method, comprising:
-
obtaining a polarization-voltage curve corresponding to a current value and a temperature of a secondary battery based on information thereabout stored in a memory, the information being stored with a correlation with the current value and the temperature of the secondary battery; estimating a discharge curve of the secondary battery by subtracting the obtained polarization-voltage curve from an open-circuit voltage curve obtained for the secondary battery; and estimating a remaining power of the secondary battery based on the discharge curve. - View Dependent Claims (12, 13)
-
Specification