BATTERY CHILLER CONTROL WITH ELECTRONIC EXPANSION DEVICE

• Main Authors: LAMBERT Steven L, EVANS Mark C, JALILEVAND Ali, EVANS Timothy Van, XU Jan, JOHNSTON William Stewart
• Format: Patent
• Language: English
• Published: 14.12.2017
• Subjects: ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING,OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODSSPACES OF VEHICLES; BASIC ELECTRIC ELEMENTS; ELECTRICITY; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TRANSPORTING; VEHICLES IN GENERAL

A climate-control system for a vehicle includes a refrigerant subsystem having a chiller and an electronic expansion valve (EXV) arranged to selectively route refrigerant to the chiller. The vehicle further includes a coolant subsystem having conduit arranged to circulate coolant through a traction battery and the chiller. The coolant subsystem further includes a first temperature sensor configured to measure coolant circulating into an inlet side of the chiller and a second temperature sensor configured to measure coolant circulating out of an outlet side of the chiller. A vehicle controller is configured to, in response to the battery exceeding a threshold temperature and cabin air conditioning being requested, command opening of the EXV to a predetermined position and adjust the position based on a measured coolant temperature difference between the first temperature sensor and the second temperature sensor.