Hybrid electric vehicle battery thermal management
AssigneeEaton Corporation
InventorsThomas R. Connolly, Xiaosong Kang, George A. Brunemann
Life of this patent
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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.
Claims19
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.
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:
- 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.
Dependencies are inferred from the claim text.