METHOD, DEVICE AND SYSTEM FOR ESTIMATING THE STATE OF HEALTH OF A BATTERY IN AN ELECTRIC OR HYBRID VEHICLE DURING OPERATION THEREOF, AND METHOD FOR CREATING MODEL FOR ESTIMATION OF SAID TYPE
First Claim
1. A method for estimating the state of health of a battery of an electric or hybrid vehicle in conditions of use, comprising the following steps:
- a) during the operation of said battery, acquiring a time series of measurements of speed or of acceleration of said vehicle and, simultaneously, at least one time series of measurements of a quantity chosen from;
a current or a power delivered by said battery, and a voltage at its terminals;
b) extracting segments of said time series corresponding to speed or acceleration patterns that satisfy at least one predefined condition; and
c) determining estimations of the state of health of said battery by application of at least one continuous estimation or classification model to said segments of said time series.
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Abstract
A method for estimating the state of health of a battery of an electric or hybrid vehicle in conditions of use, comprises the following steps: a) during the operation of the battery, acquiring a time series of measurements of speed or of acceleration of the vehicle and, simultaneously, at least one time series of measurements of a quantity chosen from: a current or a power delivered by the battery, and a voltage at its terminals; b) extracting segments of the time series corresponding to speed or acceleration patterns that satisfy at least one predefined condition; and c) determining estimations of the state of health of the battery by application of at least one continuous estimation or classification model to the segments of the time series. A device and system for implementing such a method and a method for constructing a continuous estimation or classification model are provided.
38 Citations
15 Claims
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1. A method for estimating the state of health of a battery of an electric or hybrid vehicle in conditions of use, comprising the following steps:
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a) during the operation of said battery, acquiring a time series of measurements of speed or of acceleration of said vehicle and, simultaneously, at least one time series of measurements of a quantity chosen from;
a current or a power delivered by said battery, and a voltage at its terminals;b) extracting segments of said time series corresponding to speed or acceleration patterns that satisfy at least one predefined condition; and c) determining estimations of the state of health of said battery by application of at least one continuous estimation or classification model to said segments of said time series. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for constructing a model for estimating the state of health of a battery of an electric or hybrid vehicle in conditions of use, comprising the following steps:
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A) over a plurality of periods of operation of said battery, acquiring a time series of measurements of speed (v) or of acceleration of said vehicle and, simultaneously, at least one time series of measurements of a quantity chosen from;
a current or a power delivered by said battery, and a voltage at its terminals;B) extracting segments of said time series corresponding to speed or acceleration patterns that satisfy at least one predefined condition; C) determining reference states of health of said battery during said periods of operation by interpolation of estimations of said state of health obtained by means of offline characterization performed between said periods of operation; and D) constructing at least one continuous estimation or classification model from said segments of said time series and from the corresponding reference states of health. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification