Automatic determination of baselines for battery testing
First Claim
1. A method for automatically generating baselines for impedance-based battery testing, the method comprising:
- obtaining individual impedance information for each battery unit in a network of batteries by measuring the response of the battery to a defined electrical excitation signal;
calculating an individual-referenced baseline for each battery unit from the individual impedance information;
adjusting the individual-referenced baselines to account for a temperature associated with each battery unit;
adjusting the individual-referenced baselines to account for a calendar age associated with each battery unit, using a microprocessor; and
calculating a first population-referenced baseline from the individual-referenced-baselines as adjusted, for a first point in time.
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Accused Products
Abstract
Baseline values for battery testing are automatically determined for individual batteries, battery cells, or networks of batteries. Impedance information is obtained from individual batteries and adjusted for operating conditions at a site of use (e.g., temperature, age, connection topology and user-entered information). Population-referenced baselines are automatically calculated from the group of individual-referenced baselines. All baselines can be continually updated and improved. SOC and SOH characteristics of batteries in the network can be automatically determined by comparison of measured impedance, and other, values to said baselines.
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Citations
56 Claims
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1. A method for automatically generating baselines for impedance-based battery testing, the method comprising:
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obtaining individual impedance information for each battery unit in a network of batteries by measuring the response of the battery to a defined electrical excitation signal; calculating an individual-referenced baseline for each battery unit from the individual impedance information; adjusting the individual-referenced baselines to account for a temperature associated with each battery unit; adjusting the individual-referenced baselines to account for a calendar age associated with each battery unit, using a microprocessor; and calculating a first population-referenced baseline from the individual-referenced-baselines as adjusted, for a first point in time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for automatically generating baselines for impedance-based battery testing, the method comprising:
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obtaining individual impedance information for each battery unit in a network of batteries by measuring the response of the battery to a defined electrical excitation signal, wherein the impedance information comprises a representation of a dynamic response of an impedance parameter of one of the battery units to a known perturbation, the dynamic response being related to a condition of the battery unit, the perturbation being produced by the usage to which the battery network is subject; calculating an individual-referenced baseline for each battery unit from the individual impedance information; adjusting the individual-referenced baselines to account for a temperature associated with each battery unit; adjusting the individual-referenced baselines to account for a calendar age associated with each battery unit, using a microprocessor; and calculating a first population-referenced baseline from the individual-referenced-baselines as adjusted, for a first point in time. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 39, 40, 41, 42, 43, 44, 45, 46)
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37. The method of 36, further comprising:
determining a distribution of the condition within the network of batteries by comparing impedance information subsequently gathered from the batteries in the network to the population-referenced baseline.
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38. The method of 37, further comprising:
determining a condition for the network of batteries as a whole by assessment of the distribution of the condition within the network of batteries.
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47. A computer program product comprising
program code stored on a non-transitory computer-readable medium for automatically generating baselines for impedance-based battery testing, the computer product comprising program code for: -
obtaining individual impedance information for each battery unit in a network or other population of batteries by utilizing the response of the battery to a defined electrical excitation signal; calculating an individual-referenced baseline for each battery unit from the individual impedance information; adjusting the individual-referenced baselines to account for a temperature associated with each battery unit; adjusting the individual-referenced baselines to account for a calendar age or life fraction associated with each battery unit; and calculating a first population-referenced baseline from the individual-referenced-baselines as adjusted, for a first point in time. - View Dependent Claims (48, 49, 50, 51)
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52. A system for automatically generating baselines for impedance-based battery testing, system comprising:
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means for obtaining individual impedance information for each battery unit in a network or other population of batteries by utilizing the response of the battery to a defined electrical excitation signal; means for calculating an individual-referenced baseline for each battery unit from the individual impedance information; means for adjusting the individual-referenced baselines to account for a temperature associated with each battery unit; means for adjusting the individual-referenced baselines to account for a calendar age or life fraction associated with each battery unit; and means for calculating a first population-referenced baseline from the individual-referenced-baselines as adjusted, for a first point in time. - View Dependent Claims (53, 54, 55, 56)
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Specification