Traction battery cooling system with coolant proportional valve
AssigneeFord Global Technologies, LLC
InventorsTimothy Noah Blatchley, Angel Fernando Porras
Life of this patent
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Abstract
A cooling system is provided for a traction battery of an electrified motor vehicle. That cooling system includes a cooling circuit, a refrigerant circuit, a plurality of flow control valves and a control system. That control system includes a controller configured to (a) control operation of the plurality of flow control valves, including a coolant proportional valve, and (b) prioritize cabin cooling over traction battery cooling.
Claims20
A cooling system for an electrified motor vehicle, comprising:
- a coolant circuit circulating coolant between a traction battery and either a battery radiator or a chiller;
- a refrigerant circuit circulating refrigerant between a compressor, a condenser and either a first evaporator or said chiller;
- a plurality of flow control valves in said coolant circuit and said refrigerant circuit;
- and
- a control system including a controller configured to (a) control operation of said plurality of flow control valves and (b) prioritize cabin cooling over traction battery cooling when the traction battery is at a normal operating temperature;
- wherein, said coolant circuit further includes a coolant bypass and said plurality of flow control valves includes a coolant proportional valve in said coolant circuit between said traction battery and said chiller controlling flow of said coolant through said chiller.
A method of controlling traction battery cooling while limiting temperature swings of conditioned air into a cabin of an electrified motor vehicle, comprising:
- prioritizing, by a controller, cabin cooling over traction battery cooling based upon HVAC load and evaporator error;
- and
- controlling flow of battery coolant to a chiller by means of a coolant proportional valve under control of said controller.
Dependencies are inferred from the claim text.