Method for estimation of the rehabilitation time of the performance of a traction battery of a hybrid vehicle
First Claim
1. A method for estimating a duration of a battery performance rehabilitation phase for a traction battery of a hybrid vehicle including a combustion engine and at least one electric motor, comprising:
- activating the battery performance rehabilitation phase when a power available in the battery is below a required minimum power level to launch the vehicle from a stop using only the electric motor until a target speed at which the combustion engine can cut in, said phase making it possible to bring said battery to state-of-charge and temperature conditions enabling the battery to supply said required minimum power level;
supplying a model of operation of the battery including, in a plane (BSOC, T) where BSOC denotes a state of charge of the battery and where T denotes a temperature of the battery, an isopower curve representing, in said plane, operating points of the battery enabling the battery to substantially deliver said required minimum power level to launch the vehicle from a stop using only the electric motor until the target speed at which the combustion engine can cut in, said curve separating the operating points making it possible to deliver a power level above the required minimum power level from the operating points enabling the battery to deliver only a power level below the required minimum power level; and
estimating the duration of said battery performance rehabilitation phase, which represents the duration for the battery to be charged from the power available to the required minimum power level to launch the vehicle from a stop using only the electric motor until the target speed at which the combustion engine can cut in, from said model of operation supplied.
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Abstract
A method estimates a duration of a battery performance rehabilitation phase. The method includes activating the battery performance rehabilitation phase when a power available in a battery is below a required minimum power level. The method also includes supplying a model of operation of the battery including, in a plane (BSOC, T) where BSOC denotes a state of charge of the battery and where T denotes a battery temperature, an isopower curve representing operating points of the battery enabling the battery to substantially deliver the required minimum power level, the curve separating operating points making it possible to deliver a power level above the required minimum power level from operating points enabling the battery to deliver only a power level below the required minimum power level. The method also includes estimating the duration of the battery performance rehabilitation phase from the model of operation supplied.
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Citations
12 Claims
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1. A method for estimating a duration of a battery performance rehabilitation phase for a traction battery of a hybrid vehicle including a combustion engine and at least one electric motor, comprising:
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activating the battery performance rehabilitation phase when a power available in the battery is below a required minimum power level to launch the vehicle from a stop using only the electric motor until a target speed at which the combustion engine can cut in, said phase making it possible to bring said battery to state-of-charge and temperature conditions enabling the battery to supply said required minimum power level; supplying a model of operation of the battery including, in a plane (BSOC, T) where BSOC denotes a state of charge of the battery and where T denotes a temperature of the battery, an isopower curve representing, in said plane, operating points of the battery enabling the battery to substantially deliver said required minimum power level to launch the vehicle from a stop using only the electric motor until the target speed at which the combustion engine can cut in, said curve separating the operating points making it possible to deliver a power level above the required minimum power level from the operating points enabling the battery to deliver only a power level below the required minimum power level; and estimating the duration of said battery performance rehabilitation phase, which represents the duration for the battery to be charged from the power available to the required minimum power level to launch the vehicle from a stop using only the electric motor until the target speed at which the combustion engine can cut in, from said model of operation supplied. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device for estimating a duration of a battery performance rehabilitation phase for a traction battery of a hybrid vehicle including a combustion engine and at least one electric motor, making it possible to bring a battery into state-of-charge and temperature conditions enabling the battery to supply a required minimum power level, said device comprising:
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means for storing a model of operation of the battery including, in a plane (BSOC, T) where BSOC denotes a state of charge of the battery and where T denotes a temperature of the battery, an isopower curve representing, in said plane, operating points of the battery enabling the battery to substantially deliver said required minimum power level to launch the vehicle from a stop using only the electric motor until a target speed at which the combustion engine can cut in, said curve separating the operating points making it possible to deliver a power level above the required minimum power level from the operating points enabling the battery to deliver only a power level below the required minimum power level, and a computer to estimate the duration of said charging phase, which represents the duration for the battery to be charged from the power available to the required minimum power level to launch the vehicle from a stop using only the electric motor until the target speed at which the combustion engine can cut in, from said model of operation supplied. - View Dependent Claims (10, 11, 12)
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Specification