Method for heating a battery in a hybrid electric vehicle
First Claim
1. A method for heating a battery in a hybrid electric vehicle, the hybrid electric vehicle having an engine, a battery, and a control module for monitoring and controlling the hybrid electric vehicle, the method comprising the steps of:
- determining whether a temperature of the battery is below a predetermined value;
determining whether a triggering event has occurred; and
reversing polarity of a battery current when the temperature of the battery is below the predetermined value and the triggering event has occurred, wherein reversing polarity of the battery occurs at a first slew rate for a tip-in event and a second slew rate for a terminal voltage event.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for heating a battery in a hybrid electric vehicle. The hybrid electric vehicle has an engine, a battery, a motor generator powered by the engine or the battery, and a control module. The method includes the steps of determining a battery temperature and determining whether a tip-in event, a tip-out event, or a terminal voltage event has occurred. The polarity of the battery is reversed if the battery temperature is below a predetermined value and if a tip-in event, a tip-out event, or a terminal voltage event has occurred.
-
Citations
20 Claims
-
1. A method for heating a battery in a hybrid electric vehicle, the hybrid electric vehicle having an engine, a battery, and a control module for monitoring and controlling the hybrid electric vehicle, the method comprising the steps of:
-
determining whether a temperature of the battery is below a predetermined value; determining whether a triggering event has occurred; and reversing polarity of a battery current when the temperature of the battery is below the predetermined value and the triggering event has occurred, wherein reversing polarity of the battery occurs at a first slew rate for a tip-in event and a second slew rate for a terminal voltage event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for heating a battery in a hybrid electric vehicle, the hybrid electric vehicle having an engine, a battery, a motor-generator powered by the engine or the battery and adapted to drive a vehicle wheel, and a control module for monitoring and controlling the hybrid electric vehicle, the method comprising the steps of:
-
determining if a temperature of the battery is below a predetermined value; determining whether a previous polarity reversal has been completed; determining whether a tip-in event has occurred; determining whether a tip-out event has occurred; determining whether a terminal voltage event has occurred; and reversing polarity of a battery current if the temperature of the battery is below the predetermined value and the previous polarity reversal has been completed and a tip-in event, tip-out event, or a terminal voltage event has occurred. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A method for heating a battery in a hybrid electric vehicle, the hybrid electric vehicle having an engine, a battery, a motor-generator powered by the engine or the battery and adapted to drive a vehicle wheel, and a control module for monitoring and controlling the hybrid electric vehicle, the method comprising the steps of:
-
determining if a temperature of the battery is below a predetermined value; determining whether a previous polarity reversal has been completed and preventing a subsequent polarity reversal from being implemented until the previous polarity reversal has been completed; determining whether the battery is charging or discharging; determining whether a terminal voltage event has occurred and reversing polarity of a battery current at a first slew rate if the terminal voltage event has occurred; determining whether a tip-in event has occurred and reversing the polarity of the battery current at a second slew rate if the tip-in event has occurred; and determining whether a tip-out event has occurred and reversing the polarity of the battery current at a second slew rate if the tip-out event has occurred.
-
Specification