Method and apparatus for correcting voltage of secondary battery, and method and apparatus for estimating state of charge of secondary battery
First Claim
1. A method for correcting a voltage of a secondary battery, the method correcting battery voltages measured in a battery system having plural voltage measurement systems and having plural secondary batteries in each of the voltage measurement systems, and the method comprises steps of:
- calculating representative voltages from battery voltages measured in the respective voltage measurement systems in an electronic control unit;
calculating voltage correction values on the basis of the calculated representative voltages in the electronic control unit;
correcting the measured voltages of the secondary batteries in the voltage measurement systems, on the basis of the voltage correction values; and
controlling a state of charge of the battery system using the corrected measured voltages.
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Accused Products
Abstract
The present invention provides an apparatus for correcting a voltage of a secondary battery, wherein accuracy in measurement of battery voltages between battery blocks in different voltage measurement systems. In a battery ECU (101), the following components are disposed: a first voltage measuring part (102-1), a second voltage measuring part (102-2), a third voltage measuring part (102-3) and a fourth voltage measuring part (102-4) which are disposed in different voltage measurement systems so as to measure voltages of plural battery blocks; a representative voltage calculating part (105) for calculating representative voltages from battery voltages measured by the first to fourth voltage measuring parts; a voltage correction value calculating part (107) for calculating voltage correction values on the basis of the respective representative voltages; and a correction value reflecting part (109) for adding the voltage correction values to measured voltages of battery blocks in the respective corresponding voltage measurement systems.
17 Citations
18 Claims
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1. A method for correcting a voltage of a secondary battery, the method correcting battery voltages measured in a battery system having plural voltage measurement systems and having plural secondary batteries in each of the voltage measurement systems, and the method comprises steps of:
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calculating representative voltages from battery voltages measured in the respective voltage measurement systems in an electronic control unit; calculating voltage correction values on the basis of the calculated representative voltages in the electronic control unit; correcting the measured voltages of the secondary batteries in the voltage measurement systems, on the basis of the voltage correction values; and controlling a state of charge of the battery system using the corrected measured voltages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for estimating a state of charge of a secondary battery, the method comprising steps of:
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calculating representative voltages from battery voltages measured by respective voltage measurement systems in a battery system having plural voltage measurement systems and having plural secondary batteries in each of the voltage measurement systems; calculating voltage correction values on the basis of calculated representative voltages; correcting the measured voltages of the secondary batteries in each of the voltage measurement systems, on the basis of the voltage correction values; calculating state of charge of the secondary batteries on the basis of the battery voltages obtained through a step of correcting the measured voltages; and controlling the state of charge of the secondary battery using at least the calculated state of charge.
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10. An apparatus for correcting a voltage of a secondary battery, the apparatus correcting battery voltages measured in a battery system having plural voltage measurement systems and having plural secondary batteries in each of the voltage measurement systems, wherein the apparatus comprises:
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voltage measuring part provided in the respective voltage measurement systems so as to measure voltages of the secondary batteries; a representative voltage calculating part for calculating representative voltages from battery voltages measured by the voltage measuring part; a voltage correction value calculating part for calculating voltage correction values on the basis of the respective representative voltages; and a correction value reflecting part for correcting the measured voltages of the secondary batteries in each of the voltage measurement systems, on the basis of the voltage correction values. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An apparatus for estimating a state of charge of a secondary battery, comprising:
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voltage measuring part for measuring voltages of secondary batteries in a battery system having plural voltage measurement systems and plural secondary batteries in each of the voltage measurement systems, and the voltage measuring part being provided in the respective voltage measurement systems; a representative voltage calculating part for calculating representative voltages from battery voltages measured by the voltage measuring part; a voltage correction value calculating part for calculating voltage correction values on the basis of the respective representative voltages; a correction value reflecting part for correcting the measured voltages of the secondary batteries in each of the voltage measurement systems on the basis of the voltage correction values; and a state of charge calculating part for calculating state of charge of the secondary batteries on the basis of battery voltages obtained by the correction value reflecting part.
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Specification