Apparatus, methods and computer program products for estimation of battery reserve life using adaptively modified state of health indicator-based reserve life models
First Claim
1. A method of estimating reserve life for a battery, the method comprising:
- adaptively modifying a model of battery reserve life that a function of a SOH indicator responsive to intermittent capacity tests of the battery;
monitoring the SOH indicator for the battery to generate SOH indicator values; and
generating estimates of reserve life from the generated SOH indicator values according to the adaptively modified model of battery reserve life.
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Accused Products
Abstract
A model of battery reserve life that a function of a SOH indicator is adaptively modified responsive to intermittent capacity tests of a battery, e.g., based on reserve life estimates generated responsive to the capacity tests. The SOH indicator for the battery is monitored to generate SOH indicator values, and estimates of reserve life are generated from the generated SOH indicator values according to the adaptively modified model of reserve life. For example, a capacity test may be performed responsive to detection of a change in reserve life as estimated by the model of reserve life, and the model of reserve life may be modified responsive to the capacity test. The battery reserve life model may, for example, express reserve life as a function of a float voltage, a float current, a temperature, a charge/discharge cycling, an impedance, a conductance, a resistance, and/or a coup de fouet parameter. The invention may be embodied as methods, apparatus and computer program products.
90 Citations
35 Claims
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1. A method of estimating reserve life for a battery, the method comprising:
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adaptively modifying a model of battery reserve life that a function of a SOH indicator responsive to intermittent capacity tests of the battery;
monitoring the SOH indicator for the battery to generate SOH indicator values; and
generating estimates of reserve life from the generated SOH indicator values according to the adaptively modified model of battery reserve life. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of estimating reserve life of a battery, the method comprising:
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generating respective first state of health (SOH) indicator values for respective elapsed times for the battery;
generating respective first estimates of reserve life from the first SOH indicator values according to a battery reserve life model;
performing a capacity test of the battery to generate a second estimate of reserve life responsive to one of the first estimates of reserve life indicating a change in reserve life exceeding a predetermined threshold;
modifying the battery reserve life model based on the second estimate of reserve life;
generating a second SOH indicator value; and
generating a third estimate of reserve life from the second SOH indicator value according to the modified battery reserve life model. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An apparatus for estimating battery reserve life, the apparatus comprising:
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means for adaptively modifying a model of battery reserve life that a function of a SOH indicator responsive to intermittent capacity tests of the battery;
means for monitoring the SOH indicator for the battery to generate SOH indicator values; and
means for generating estimates of reserve life from the generated SOH indicator values according to the adaptively modified model of battery reserve life. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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30. An apparatus, comprising:
an adaptive battery reserve life estimator configured to adaptively modify a model of battery reserve life for a battery that a function of a SOH indicator responsive to intermittent capacity tests of the battery, to monitoring the SOH indicator for the battery to generate SOH indicator values, and to generate estimates of reserve life from the generated SOH indicator values according to the adaptively modified model of battery reserve life.
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31. A computer program product for estimating reserve life of a battery, the computer program product comprising computer program code embodied in a computer readable medium, the computer program code comprising:
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first program code configured to adaptively modify a model of battery reserve life that is a function of a SOH indicator responsive to intermittent capacity tests of the battery;
second program code configured to monitor the SOH indicator for the battery to generate SOH indicator values; and
third program code configured to generate estimates of reserve life from the generated SOH indicator values according to the adaptively modified model of battery reserve life. - View Dependent Claims (32, 33, 34, 35)
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Specification