Hybrid electric vehicle battery thermal management
First Claim
1. A method of operating a vehicle powertrain system, the powertrain system including a fuel controlled engine, an electric motor, and a battery, the fuel controlled engine and the electric motor capable of powering the powertrain system, the powertrain system capable of operating in a plurality of operational modes, the method comprising:
- detecting a current value representative of a current flowing through a portion of the battery;
calculating a first value representative of the current over a predetermined amount of time; and
de-rating at least one of the plurality of operational modes in response to the calculated first value;
determining a battery torque capability value based upon the first value;
wherein the de-rating of the at least one of the plurality of operational modes is based upon the battery torque capability value and wherein de-rating the at least one of the plurality of operational modes includes comparing the battery torque capability value to a first preselected limit for each operational mode.
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Accused Products
Abstract
A method of operating a vehicle powertrain system where the powertrain system includes a fuel controlled engine, an electric motor, and a battery, the fuel, controlled engine and the electric motor capable of powering the powertrain system. The powertrain system is capable of operating in a plurality of operational modes. The method includes detecting a current value representative of a current flowing through a portion of the battery, calculating a first value representative of the current over a predetermined amount of time, and de-rating at least one of the plurality of operational modes in response to the calculated first value.
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Citations
19 Claims
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1. A method of operating a vehicle powertrain system, the powertrain system including a fuel controlled engine, an electric motor, and a battery, the fuel controlled engine and the electric motor capable of powering the powertrain system, the powertrain system capable of operating in a plurality of operational modes, the method comprising:
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detecting a current value representative of a current flowing through a portion of the battery; calculating a first value representative of the current over a predetermined amount of time; and de-rating at least one of the plurality of operational modes in response to the calculated first value;
determining a battery torque capability value based upon the first value;
wherein the de-rating of the at least one of the plurality of operational modes is based upon the battery torque capability value and wherein de-rating the at least one of the plurality of operational modes includes comparing the battery torque capability value to a first preselected limit for each operational mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of operating a vehicle powertrain system, the powertrain system including a fuel controlled engine, an electric motor and a battery, the fuel controlled engine and the electric motor capable of powering a drive train system, the powertrain system operating in a plurality of operational modes, the method comprising:
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supplying torque from the motor to the powertrain system; determining a first value representative of thermal energy associated with a current flow through a portion of the battery over a predetermined amount of time; and de-rating at least one of the plurality of operational modes in response to the determined first value; and
determining a battery torque capability value based upon the determined first value;
wherein the de-rating of the at least one of the plurality of operational modes is based upon the battery torque capability value. - View Dependent Claims (16, 17, 18, 19)
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Specification