Balancing battery heating and cabin heating with shared thermal-management system

A vehicle comprising:

• a traction battery;
• an electric machine powered by the traction battery and configured to power wheels of the vehicle;
• a thermal-management system including:
• a battery loop configured to circulate coolant through the traction battery,
• a cabin heating loop configured to circulate coolant through a heater and a heater core,
• a blower configured to circulate air through the heater core to heat a passenger cabin of the vehicle, and
• a valve configured to fluidly connect the battery loop and the heating loop when the valve is in a first position and configured to fluidly isolate the battery loop and the heating loop when the valve is in a second position;
• and
• a controller programmed to:
• responsive to (i) battery heating being requested, (ii) a temperature of the battery being between upper and lower thresholds, and (iii) cabin heating being requested, actuate the valve to the second position and energize the blower and the heater to provide heating to the passenger cabin but not the battery,
• responsive to (i) battery heating being requested, (ii) the temperature of the battery being greater than the lower threshold, and (iii) cabin heating being requested, actuate the valve to the first position, energize the blower and the heater to provide heating to the cabin and the battery, and actuate a blend door to a recirculation position.

A vehicle comprising:

• a traction battery;
• an electric machine powered by the traction battery and configured to power wheels of the vehicle;
• a thermal-management system including a battery loop, a cabin heating loop, and a valve configured to fluidly connect the battery loop and the cabin heating loop when in a first position and configured to fluidly isolate the battery loop and the cabin heating loop when in a second position;
• and
• a controller programmed to:
• responsive to (i) battery heating being requested, (ii) a temperature of the battery being greater than a lower threshold, and (iii) cabin heating being requested, actuate the valve to the first position to heat a cabin and the battery,
• limit a speed of the blower to a speed threshold, and
• responsive to a request to increase the speed above the speed threshold, actuate the valve to the second position.