Patent attributes
A vehicle includes a traction battery arranged to be cooled by a chiller of a refrigerant system, and a radiator of a coolant system. The coolant system includes a proportioning valve having a pair of first and second outlets that each selectively receives a proportion of coolant flowing into the valve depending upon a position of the valve. The coolant system further includes a chiller loop connected to the first outlet and arranged to convey coolant to the chiller, and a radiator loop connected to the second outlet and arranged to convey coolant to the radiator. A controller is configured to, in response to the refrigerant system being ON, actuate the proportioning valve to proportion the coolant between the first and second outlets such that heat transfer through the chiller is limited to a chiller capacity.
