Thermal Management Controls for a Vehicle Having a Rechargeable Energy Storage System
First Claim
1. A method of operating a RESS thermal system in a vehicle having a coolant loop for directing a coolant through a RESS and a refrigerant loop configured to selectively cool the coolant flowing through a chiller in the coolant loop, the method comprising the steps of:
- (a) determining a current target temperature range for the RESS based on at least a current vehicle operating mode and ambient temperature, the target temperature range being variable based on the current vehicle operating mode and ambient temperature;
(b) determining a temperature of the RESS;
(c) determining if the temperature of the RESS needs to increase or decrease to be within the current target temperature range;
(d) if the determination is made that the temperature of the RESS needs to increase, determining if an active heating or a passive heating of the coolant will be employed, the active heating using a greater amount of energy over a shorter time period than the passive heating; and
(e) activating the determined active heating or passive heating of the coolant from step (d).
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Accused Products
Abstract
A method of operating a RESS thermal system in a vehicle having a coolant loop for directing a coolant through a RESS and a refrigerant loop configured to selectively cool the coolant flowing through a chiller in the coolant loop, including: determining a current target temperature range for the RESS based on a current vehicle operating mode and ambient temperature; determining a temperature of the RESS; determining if the temperature of the RESS needs to increase or decrease to be within the current target temperature range; if the determination is made that the temperature of the RESS needs to increase, determining if an active heating or a passive heating of the coolant will be employed, the active heating using a greater amount of energy over a shorter time period than the passive heating; and activating the determined active heating or passive heating of the coolant.
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Citations
20 Claims
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1. A method of operating a RESS thermal system in a vehicle having a coolant loop for directing a coolant through a RESS and a refrigerant loop configured to selectively cool the coolant flowing through a chiller in the coolant loop, the method comprising the steps of:
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(a) determining a current target temperature range for the RESS based on at least a current vehicle operating mode and ambient temperature, the target temperature range being variable based on the current vehicle operating mode and ambient temperature; (b) determining a temperature of the RESS; (c) determining if the temperature of the RESS needs to increase or decrease to be within the current target temperature range; (d) if the determination is made that the temperature of the RESS needs to increase, determining if an active heating or a passive heating of the coolant will be employed, the active heating using a greater amount of energy over a shorter time period than the passive heating; and (e) activating the determined active heating or passive heating of the coolant from step (d). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of operating a RESS thermal system in a vehicle having a coolant loop for directing a coolant through a RESS and a refrigerant loop configured to selectively cool the coolant flowing through a chiller in the coolant loop, the method comprising the steps of:
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(a) powering down the vehicle; (b) determining the RESS temperature at power down; (c) determining an ambient temperature at power down; (d) determining a time period to wait after power down to wakeup the RESS thermal system and provide RESS battery heating or cooling, if needed, based on at least the determined RESS temperature and ambient temperature at power down; (e) waking up the RESS thermal system after the predetermined time period; and (f) providing RESS heating or cooling, as needed, after waking up the RESS thermal system. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification