System and method for posteriori adaptation of a state of charge model in a battery
First Claim
1. A method of estimating a state of charge of a battery comprising:
- measuring with a sensor at least one of an input current, input voltage, output current, and output voltage from the battery;
identifying with a processor a first state of charge in the battery at a first time with reference to a first measurement signal from the sensor;
identifying with the processor the first state of charge in the battery at a second time after the battery operates in at least one operating mode with a plurality of states of charge in the battery other than the first state of charge with reference to a second measurement signal from the sensor;
identifying with the processor an estimated state of charge at the second time with reference to a model having a plurality of model parameters stored in a memory corresponding to the first state of charge at the first time, the second time being later than the first time;
identifying with the processor an error between the first state of charge measured for the battery and the estimated state of charge of the battery;
modifying with the processor at least one of the plurality of model parameters with reference to the identified error; and
generating with an output device an output corresponding to an estimate of the state of charge of the battery using the model with the at least one modified parameter while the battery operates in the at least one operating mode after the second time.
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Accused Products
Abstract
A method for estimating a state of charge in a battery includes identifying a first state of charge in the battery at a first time, identifying the first state of charge in the battery at a second time after operation of the battery, identifying an estimated state of charge at the second time with reference to a model having a plurality of model parameters, modifying at least one of the plurality of model parameters with reference to an error between the estimated state of charge and the first state of charge, and generating an output corresponding to an estimate of the state of charge of the battery using the model with the at least one modified parameter while operating the battery in the at least one operating mode after the second time.
9 Citations
21 Claims
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1. A method of estimating a state of charge of a battery comprising:
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measuring with a sensor at least one of an input current, input voltage, output current, and output voltage from the battery; identifying with a processor a first state of charge in the battery at a first time with reference to a first measurement signal from the sensor; identifying with the processor the first state of charge in the battery at a second time after the battery operates in at least one operating mode with a plurality of states of charge in the battery other than the first state of charge with reference to a second measurement signal from the sensor; identifying with the processor an estimated state of charge at the second time with reference to a model having a plurality of model parameters stored in a memory corresponding to the first state of charge at the first time, the second time being later than the first time; identifying with the processor an error between the first state of charge measured for the battery and the estimated state of charge of the battery; modifying with the processor at least one of the plurality of model parameters with reference to the identified error; and generating with an output device an output corresponding to an estimate of the state of charge of the battery using the model with the at least one modified parameter while the battery operates in the at least one operating mode after the second time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for estimating a state of charge in a battery comprising:
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a sensor operatively connected to a battery and configured to measure at least one of an input current, input voltage, output current, and output voltage from the battery; a memory configured to store programmed instructions and a plurality of model parameters associated with the battery; an output device configured to generate an output corresponding to an estimated state of charge in the battery; and a processor operatively connected to the sensor, the memory, and the output device, the processor being configured to; identify a first state of charge in the battery at a first time with reference to a first signal from the sensor; identify the first state of charge in the battery at a second time with reference to a second signal from the sensor after the battery operates in at least one operating mode with a plurality of states of charge in the battery other than the first state of charge, the second time being later than the first time; identify an estimated state of charge at the second time with reference to a model having the plurality of model parameters corresponding to the battery in the first state of charge at the first time; identify an error between the first state of charge and the estimated state of charge of the battery; modify at least one of the plurality of model parameters with reference to the identified error; and generate, with the output device, an output corresponding to an estimate of the state of charge of the battery using the model with the at least one modified parameter while the battery operates in the at least one operating mode after the second time. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification