Porsche has released more details of the upcoming Cayenne Electric, which it says will be revealed in a few weeks. After giving us a look at the all-electric SUV’s interior previously, the German carmaker is now focusing on the high-voltage technology found in the powertrain.
According to the company, the Cayenne Electric is built on an updated version of the Premium Platform Electric (PPE) with an 800-volt electrical architecture, similar to the Macan Electric. The lithium-ion battery is integrated into the vehicle structure in the floor and is made up of six interchangeable modules and 192 large-format pouch cells.
Compared to the second-generation Taycan battery, the ratio between the cells and battery housing has improved by 12%, resulting in weight and packaging advantages. A specially developed aluminium structure protects the cells by absorbing energy in a targeted manner in the event of an impact.
The cells feature a graphite-silicon anode and a nickel-manganese-cobalt-aluminium (NMCA) cathode. Porsche says the high nickel content of 86% ensures maximum energy density, while silicon in the anode enhances fast charging, and aluminium increases the rigidity of the cell structure. The result of all this chemistry work is 7% higher energy density compared to the current Taycan battery, with the Cayenne Electric’s battery having a gross energy content of 113 kWh.
That figure sounds encouraging, especially when Porsche quotes a combined WLTP range of “more than 600 km.” Prior to this announcement, journalists in the United States drove prototypes over 563 km on a single battery charge at a maximum permitted speed of 113 km/h.
With an 800-volt system, the Cayenne Electric is capable of DC fast charging at up to 400 kW. This is said to get the battery from a 10-80% state of charge in less than 16 minutes, with 300 km of range being added with just 10 minutes of being plugged in.
Porsche notes that the charging rate consistently remains between 350 and 400 kW at up to about 50% state of charge. Put simply, the Cayenne Electric can sustain a high level of charging power for a considerable period, which isn’t always the case with electric vehicles (EVs).
More impressively, this optimal fast charging curve is achievable from a battery temperature of just 15 degrees Celsius, which is apparently lower than before and more robust under real-world conditions where the climate changes throughout the year. In markets where only 400-volt charging stations are present, the SUV can charge at up to 200 kW without requiring an additional booster
Managing the battery’s thermals and ensuring it operates within an optimal range is a cooling system that regulates the battery’s temperature from both above and below. Porsche says the cooling capacity corresponds to about 100 large household refrigerators and it is using energy-efficient pressures fans for the first time that consume 15% less energy than conventional suction fans.
Another thermal-related system is the new Predictive Thermal Management, which links the vehicle’s cooling and heating circuits and continuously manages both in relation to the environment and driving profile. Its mission is to keep the battery at an optimum temperature at all times, while also working closely with the enhanced Charging Planner. Porsche also recaps that the Cayenne Electric will be offered with a wireless charging system for the first time.
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