Adaptive algorithm to control and characterize super-capacitor performance
First Claim
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1. A method of managing power in a vehicle system incorporating a super-capacitor (SC) energy storage device, comprising:
- modeling said SC energy storage device with an equivalent circuit having first and second parameters;
estimating a value of said first and second parameters based on a measured voltage; and
determining an available instantaneous power of said SC energy storage device based on said measured voltage and said estimated first and second parameters.
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Abstract
A method for determining a state of charge (SOC) of a super-capacitor (SC) system includes modeling the SC system with an equivalent circuit having first and second parameters. The method further includes estimating a value of the first and second parameters based on a measured voltage and determining the SOC based on the first and second parameters.
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Citations
26 Claims
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1. A method of managing power in a vehicle system incorporating a super-capacitor (SC) energy storage device, comprising:
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modeling said SC energy storage device with an equivalent circuit having first and second parameters;
estimating a value of said first and second parameters based on a measured voltage; and
determining an available instantaneous power of said SC energy storage device based on said measured voltage and said estimated first and second parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A vehicle power management system, comprising:
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an energy storage device including a super-capacitor;
a voltage measuring device that determines a measured voltage; and
a controller that estimates a value of first and second parameters based on an equivalent circuit of said energy storage device and said measured voltage and that determines an available instantaneous power of said energy storage device based on said measured voltage and said estimated first and second parameters. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for determining a state of charge (SOC) of a super-capacitor (SC) system, comprising:
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modeling said SC system with an equivalent circuit having first and second parameters;
estimating a value of said first and second parameters based on a measured voltage;
calculating a voltage-based component of said SOC based on said estimated first and second parameters and minimum and maximum voltages of said SC system under a zero current condition;
calculating a current-based component of said SOC based on said second parameter; and
determining said SOC based on said voltage-based component of said SOC and said current-based component of said SOC. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification