METHOD AND APPARATUS FOR REAL-TIME LIFE ESTIMATION OF AN ELECTRIC ENERGY STORAGE DEVICE IN A HYBRID ELECTRIC VEHICLE
First Claim
1. Method to determine state-of-life of an electrical energy storage device operative to exchange electrical energy with a hybrid vehicular powertrain including first and second electric machines each machine operable to impart torque to a two-mode, compound-split electromechanical transmission having four fixed gear ratios and two continuously variable operating modes, comprising:
- monitoring electrical current through the electrical energy storage device;
monitoring a state-of-charge of the electrical energy storage device;
monitoring temperature of the electrical energy storage device during periods to of vehicle activity;
monitoring temperature of the electrical energy storage device during periods of vehicle inactivity; and
,determining a state-of-life of the electrical energy storage device based upon the electrical current, the state-of-charge, and the temperature of the electrical energy storage device during periods of vehicle activity and during periods of vehicle inactivity.
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0 Petitions
Accused Products
Abstract
A hybrid vehicular powertrain includes an electrical energy storage device. State-of-life for the electrical energy storage device is predictively determined based on electrical current, state-of-charge, and temperature of the electrical energy storage device during active and quiescent periods of operation.
157 Citations
14 Claims
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1. Method to determine state-of-life of an electrical energy storage device operative to exchange electrical energy with a hybrid vehicular powertrain including first and second electric machines each machine operable to impart torque to a two-mode, compound-split electromechanical transmission having four fixed gear ratios and two continuously variable operating modes, comprising:
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monitoring electrical current through the electrical energy storage device; monitoring a state-of-charge of the electrical energy storage device; monitoring temperature of the electrical energy storage device during periods to of vehicle activity; monitoring temperature of the electrical energy storage device during periods of vehicle inactivity; and
,determining a state-of-life of the electrical energy storage device based upon the electrical current, the state-of-charge, and the temperature of the electrical energy storage device during periods of vehicle activity and during periods of vehicle inactivity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus for determining state-of-life of an electrical energy storage device operative to exchange electrical energy with a hybrid vehicular powertrain including first and second electric machines each machine operable to impart torque to a two-mode, compound-split electromechanical transmission having four fixed gear ratios and two continuously variable operating modes, comprising:
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a temperature sensor adapted for sensing temperature of the energy storage device; and a computer based controller adapted to receive a signal indicative of sensed energy storage device temperature; said computer based controller including a storage medium having a computer program encoded therein, said computer program comprising; code for monitoring electrical current through the electrical energy storage device; code for monitoring a state-of-charge of the electrical energy storage device; code for monitoring temperature of the electrical energy storage device during periods of vehicle activity; code for monitoring temperature of the electrical energy storage device during periods of vehicle inactivity; code for monitoring a state-of-life of the electrical energy storage device based upon the electrical current, the state-of-charge, and the temperature of the electrical energy storage device during periods of vehicle activity and during periods of vehicle inactivity; and code to determine state-of-life of the electrical energy storage device, based upon the electrical current, the state-of-charge of the electrical energy storage device, and the temperature of the electrical energy storage device during periods of vehicle activity and during periods of vehicle inactivity. - View Dependent Claims (11, 12, 13, 14)
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Specification