Method and apparatus for soft-sensor characterization of batteries
First Claim
1. A method for simulating the operation of a rechargeable battery, comprising the steps of:
- a) obtaining (503, 553) a value for at least one parameter that describes an internal state of the battery, b) calculating (504, 505, 554, 555), by using said obtained value, a prediction value for a characteristic of the battery that is observable outside the battery and c) repeating steps a) and b) multitude of times in order to simulate the operation of the battery over a certain period of time, characterized in that it comprises the steps of detecting (507, 556) a difference between a calculated prediction value and a known value of a corresponding characteristic in a corresponding situation, and correcting (507, 558) the obtained value of said at least one parameter before a further prediction value calculating step by an amount that is proportional to said detected difference.
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Abstract
A method and apparatus are disclosed for simulating the operation of a rechargeable battery. There is obtained (503, 553) a value for at least one parameter that describes an internal state of the battery. Said obtained value is used for calculating (504, 505, 554, 555) a prediction value for a characteristic of the battery that is observable outside the battery. These steps are repeated a multitude of times in order to simmulate the operation of the battery over a certain period of time. A difference is detected (507, 556) between a calculated prediction value and a known value of a corresponding characteristic in a corresponding situation. The obtained value of said at least one parameter is corrected (507, 558) before a further prediction value calculating step by an amount that is proportional to said detected difference.
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Citations
8 Claims
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1. A method for simulating the operation of a rechargeable battery, comprising the steps of:
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a) obtaining (503, 553) a value for at least one parameter that describes an internal state of the battery, b) calculating (504, 505, 554, 555), by using said obtained value, a prediction value for a characteristic of the battery that is observable outside the battery and c) repeating steps a) and b) multitude of times in order to simulate the operation of the battery over a certain period of time, characterized in that it comprises the steps of detecting (507, 556) a difference between a calculated prediction value and a known value of a corresponding characteristic in a corresponding situation, and correcting (507, 558) the obtained value of said at least one parameter before a further prediction value calculating step by an amount that is proportional to said detected difference. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for simulating the operation of a rechargeable battery (601, 602, 603, 604), comprising:
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means (616) for obtaining values for parameters that describe an internal state of the battery, means (616) for calculating by using said obtained values, prediction values for characteristics of the battery that are observable outside the battery;
said means (616) being adapted to perform repetitive steps of obtaining values for parameters and calculating prediction values in order to simulate the operation of the battery over a certain period of time, characterized in that it comprises means (616) for detecting a difference between a calculated prediction value and a known value of a corresponding characteristic of the battery in a corresponding situation, and means (616) for correcting an obtained value of a parameter before calculating a further prediction value by an amount that is proportional to a detected difference. - View Dependent Claims (7, 8)
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Specification