METHOD AND SYSTEM FOR ESTIMATING BATTERY CAPACITY IN A VEHICLE
First Claim
1. A method for estimating the capacity of a battery element in a vehicle, comprising the steps of:
- (a) determining if one or more threshold conditions have been met;
(b) calculating the internal resistance of the battery element; and
(c) when the threshold conditions have been met, using the calculated internal resistance of the battery element to estimate the capacity of the battery element.
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Accused Products
Abstract
A system and method is provided for estimating the capacity of a battery element in a vehicle, such as a hybrid electric vehicle. In one embodiment, the method determines if one or more threshold conditions have been met (e.g., conditions pertaining to battery temperature or battery state-of-charge (SOC)) and calculates the internal resistance of the battery element. When the threshold conditions have been met, the method uses the calculated internal resistance to estimate the capacity of the battery element. A corresponding battery system is also provided that includes a battery element, one or more battery sensors, and a control module configured to perform the method described above.
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Citations
20 Claims
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1. A method for estimating the capacity of a battery element in a vehicle, comprising the steps of:
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(a) determining if one or more threshold conditions have been met; (b) calculating the internal resistance of the battery element; and (c) when the threshold conditions have been met, using the calculated internal resistance of the battery element to estimate the capacity of the battery element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for estimating the capacity of a battery element in a vehicle, comprising the steps of:
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(a) calculating the internal resistance of the battery element; (b) acquiring one or more values for one or more battery-related parameters that pertain to the battery element; and (c) using the calculated internal resistance of the battery element and the one or more acquired battery-related parameter values to estimate the capacity of the battery element. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A battery system for a vehicle, comprising:
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a battery element; one or more battery sensors configured to detect electrical parameters of the battery element; and a control module electrically coupled to the one or more battery sensors, wherein the control module is configured to; (a) determine if one or more threshold conditions have been met; (b) calculate the internal resistance of the battery element using the detected electrical parameters of the battery element; and (c) when the one or more threshold conditions have been met, estimate the capacity of the battery element based on the calculated internal resistance of the battery element.
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Specification