STATE OF HEALTH RECOGNITION OF SECONDARY BATTERIES
First Claim
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1. A method for determining a state of health of a battery, comprising the operations of:
- applying a predefined load profile to a battery;
obtaining a plurality of battery response voltage data corresponding to points along the predefined load profile;
calculating a matrix of parameters from the battery response voltage data, wherein the matrix of parameters includes battery ohm resistance data, battery chemical resistance data, and battery electrical double layer capacity data; and
determining from the matrix of parameters the state of health of the battery.
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Abstract
An invention is provided for determining a state of health of a battery. The invention includes applying a predefined load profile to a battery, and obtaining a plurality of battery response voltage data corresponding to points along the predefined load profile. A matrix of parameters, which includes, among other data, battery ohm resistance data, battery chemical resistance data, and battery electrical double layer capacity data, is calculated from the battery response voltage data. Thereafter, the matrix of parameters is utilized to determine the state of health of the battery.
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Citations
20 Claims
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1. A method for determining a state of health of a battery, comprising the operations of:
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applying a predefined load profile to a battery;
obtaining a plurality of battery response voltage data corresponding to points along the predefined load profile;
calculating a matrix of parameters from the battery response voltage data, wherein the matrix of parameters includes battery ohm resistance data, battery chemical resistance data, and battery electrical double layer capacity data; and
determining from the matrix of parameters the state of health of the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for determining a state of health of a battery, comprising the operations of:
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generating a state of charge profile for a battery, wherein the state of charge profile indicates matrix of parameter data values corresponding to a plurality of battery state of charge percentages;
calculating a current matrix of parameters for the battery from current battery response voltage data, wherein the current matrix of parameters includes battery ohm resistance data, battery chemical resistance data, and battery electrical double layer capacity data;
comparing the current matrix of parameters to the state of charge profile to determine the current battery state of charge;
determining the state of health of the battery based on the current battery state of charge. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A system for determining a state of health of a battery, comprising:
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a switching circuit coupled to a power source and a battery load, the switching circuit capable of applying a predefined load profile to a battery; and
a battery management module coupled to the switching circuit, the battery management module comprising;
logic that obtains a plurality of battery response voltage data corresponding to points along the predefined load profile;
logic that calculates a matrix of parameters from the battery response voltage data, wherein the matrix of parameters includes battery ohm resistance data, battery chemical resistance data, and battery electrical double layer capacity data; and
logic that determines from the matrix of parameters the state of health of the battery. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification