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Cadillac and its parent company, General Motors, recently revealed more information about the technology behind the Ultium electric vehicle propulsion system. An interesting piece of technology that was revealed today involves heat pumps, which are and will be used in Ultium-powered electric vehicles.
The purpose of a dedicated energy recovery system (in simpler terms, heat pumps) for Ultium vehicles is to capture and reuse waste energy from the vehicle battery. Cadillac refers to the heat pump as an energy recovery system, and its goal is to harness waste energy to reduce the vehicle’s dependence on batteries while delivering heat to passengers, thereby increasing the range of electric vehicles. The heat pump captures the heat generated by the Ultium battery, and reuses moisture and heat from the interior and exterior of the vehicle as well as heat radiated from the passengers.
BEV3 vehicle platform for Cadillac Lyriq, with Ultum battery between axles
Reusing the heat captured by the Ultium energy recovery system helps reduce battery strain that would otherwise be required to maintain high ambient temperatures in the cab of an electric vehicle. According to Cadillac estimates, this can increase the vehicle’s driving range by as much as 10 percent, adding more power and range to the Ultium vehicle compared to other electric vehicles with similar sized batteries that do not have an energy recovery system. The luxury brand also states that energy recovery or heat pump systems can improve charging efficiency by heating the vehicle’s Ultium battery before charging.
Cadillac and GM say that the heat pump will be implemented in all current and future electric vehicles powered by the Ultium system. That includes the Cadillac Lyriq 2023, which uses the new BEV3 platform powered by an Ultium battery. The Lyriq Debut Edition is equipped with a 100.4 kWh Ultium lithium-ion battery and a single Drive Ultium motor mounted on the rear axle. The electric driveline is rated at 340 horsepower and 325 pound-feet of torque, and Cadillac estimates the Lyriq will have a driving range of 300 miles on a full charge.
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