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US 8,947,050 B2Granted
Charging of vehicle battery based on indicators of impedance and health
AssigneeFord Global Technologies, LLC
InventorsAllan Roy Gale, Bruce Carvell Blakemore, Paul Theodore Momcilovich, Michael W. Degner
Life of this patent
Estimating the term…
Abstract
A method for charging a battery may include determining a degradation condition of the battery based on impedance parameters of the battery, altering a default charge profile for the battery based on the degradation condition, and charging the battery with the altered charge profile.
Claims9
A vehicle comprising:
- a battery;
- and
- at least one controller configured to
- select a charge voltage and maximum current for the battery based on a rate of change of an impedance parameter of the battery indicative of battery age such that as the rate of change increases the selected charge voltage increases,
- charge the battery at the selected charge voltage,
- detect a sulphation condition of the battery based on a value of the impedance parameter falling within a predefined range of impedance parameter values, a value of a first health term of the battery, Health_Term_1, being less than a predefined range of first health term values, and a value of a second health term of the battery, Health_Term_2, being less than a predefined range of second health term values, and
- in response to the sulphation condition, increase the selected charge voltage.
4 more elements
A method for charging a battery comprising:
- selecting a charge voltage and maximum current for the battery based on a rate of change of an impedance parameter of the battery indicative of battery age such that as the rate of change increases the selected charge voltage increases;
- charging the battery at the selected charge voltage;
- detecting a shorted cell condition of the battery based on a value of the impedance parameter falling within a predefined range of impedance parameter values a value of a first health term of the battery, Health_Term_1, being less than a predefined range of first health term values, and a value of a second health term of the battery, Health_Term_2, falling within a predefined range of second health term values;
- and
- in response to the shorted cell condition, decreasing the selected charge voltage.
2 more elements
A vehicle comprising:
- a battery;
- and
- at least one controller configured to
- select a set point voltage and set point current for the battery based on a rate of change of an impedance parameter of the battery indicative of battery age such that as the rate of change increases the set point voltage and set point current increases,
- charge the battery at the set points,
- detect a dry out condition of the battery based on a value of the impedance parameter being less than a predefined range of impedance parameter values, a value of a first health term of the battery, Health_Term_1, falling within a predefined range of first health term values, and a value of a second health term of the battery, Health_Term_2, falling within a predefined range of second health term values, and
- in response to the dry out condition, increase the set point voltage.
4 more elements
Dependencies are inferred from the claim text.