Method and system for determining state-of-health of a nickel-metal hydride battery using an intelligent system
First Claim
1. A method of determining the state-of-health of a nickel-metal hydride battery connected to a load, the method comprising:
- detecting an impedance characteristic of the battery at at least one selected frequency; and
determining the state-of-health of the battery from a fuzzy system trained in a relationship between said impedance characteristic at said at least one frequency and said state-of-health, wherein said state-of-health is a function of and varies with the battery'"'"'s ability to deliver power required by the load and the battery'"'"'s capacity to meet load requirements.
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Abstract
A method and system for determining the state-of-health of a nickel-metal hydride battery connected to a load comprises: detecting at least one of a real and imaginary part of an impedance of the battery at each of a first set of selected frequencies, the first set of selected frequencies including at least one frequency, and determining the state-of-health of the battery from a fuzzy system trained in a relationship between each impedance and the state-of-health, wherein the state-of-health is a function of the battery'"'"'s ability to deliver power required by the load and the battery'"'"'s capacity to meet load requirements.
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Citations
20 Claims
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1. A method of determining the state-of-health of a nickel-metal hydride battery connected to a load, the method comprising:
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detecting an impedance characteristic of the battery at at least one selected frequency; and
determining the state-of-health of the battery from a fuzzy system trained in a relationship between said impedance characteristic at said at least one frequency and said state-of-health, wherein said state-of-health is a function of and varies with the battery'"'"'s ability to deliver power required by the load and the battery'"'"'s capacity to meet load requirements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for detecting a state of health of a nickel metal hydride battery, the system comprising:
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a microcontroller adapted to receive inputs from an impedance measurement device and a voltage measurement device, the microcontroller including software causing the microcontroller to perform operations including;
storing an input value corresponding to an impedance characteristic at at least one selected frequency; and
inputting each said input value into a fuzzy system trained in a relationship between each said value and said state-of-health, said state-of-health being a function of the battery'"'"'s ability to deliver power required by the load and the battery'"'"'s capacity to meet load requirements storing an output value corresponding to said state-of-health of the battery output from the fuzzy system. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification