Vehicular battery temperature estimation
First Claim
1. A method of determining an internal temperature estimate of a vehicle battery comprising:
- estimating an initial internal temperature of the battery;
determining a heat source temperature that is indicative of a temperature of an engine block;
determining a transfer function of airflow;
determining an integration function of the transfer function of airflow and the heat source temperature; and
updating a current internal temperature of the battery based on the integration function and the initial internal temperature.
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Abstract
A method of estimating an internal temperature of a vehicle battery is based on heat transfer between a heat source and the battery. In addition to the heat source, airflow generated by vehicle movement and radiator fans affects the internal temperature of the battery. The method estimates an initial internal temperature of the battery at engine startup based on how long the engine was off. The temperature of the heat source is determined. A transfer function is determined to represent the effect of the airflow. The method updates a current internal temperature of the battery based on the initial internal temperature and an integration of the transfer function and the heat source temperature.
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Citations
14 Claims
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1. A method of determining an internal temperature estimate of a vehicle battery comprising:
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estimating an initial internal temperature of the battery;
determining a heat source temperature that is indicative of a temperature of an engine block;
determining a transfer function of airflow;
determining an integration function of the transfer function of airflow and the heat source temperature; and
updating a current internal temperature of the battery based on the integration function and the initial internal temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification