Xiaomi introduced the SU7 Ultra prototype in July. Rumors have since been circulating online about collaborating with Prodrive, a UK engineering group with 35 years of experience in motorsports known for building race cars for brands like Porsche, BMW, and Subaru. However, Xiaomi confirmed that the SU7 Ultra is developed in-house, featuring their V8s super motor, thermal management system, electric drive, and battery controllers. The SU7 Ultra accelerates from 0 to 100 km/h in just 1.97 seconds and reaches 200 km/h in 5.96 seconds, with a top speed of 350 km/h.
The SU7 Ultra is based on Xiaomi’s SU7 electric architecture, with all core hardware and body structures designed independently by Xiaomi. It includes their track-specific CTB battery pack, developed with CATL, and introduces the second-generation Qilin battery.
High rigidity and shared architecture
Xiaomi’s new electric vehicle architecture provides high integration and exceptional rigidity, with a 51,000 Nm/deg torsional stiffness. The SU7 Ultra utilizes this architecture with a high-rigidity cage body structure made from ultra-high-strength steel, boasting a yield of up to 2000 MPa. Additionally, it features an FIA-spec roll cage welded to the body frame, enhancing passive safety and minimizing deformation under extreme conditions. This design ensures agility and durability, optimizing performance on the track.
Advanced battery technology
The SU7 Ultra incorporates Xiaomi’s CTB (Cell-to-body) battery technology, which achieves up to 77.8% volume efficiency and supports a maximum capacity of 150 kWh. This integrated design increases interior space by 17mm and features a high-power track-specific battery with a maximum output of 1330 kW. Even at a 20% charge, the battery can output over 800 kW, ensuring robust performance, especially at the Nürburgring. The CTB battery pack also includes a dual-surface cooling structure, which enhances cooling capacity by 60% compared to traditional methods.
Cutting-edge motor development
Xiaomi’s super motor series includes first-generation V6 and V6s motors, which are already in production and offer high rotational speeds with power outputs of 220 and 275 kW, respectively. The second-generation V8s motor, debuting on the SU7 Ultra, features a peak rotational speed of 27,200 rpm and a power output of 425 kW (578 PS), with an efficiency of 98.11% and a power density of 10.14 kW/kg. The SU7 Ultra is equipped with a three-motor system, combining two V8s and one V6s motor, delivering a total output of 1138 kW (1548 PS).
Challenging the Nürburgring
The SU7 Ultra is set to undergo rigorous testing on the Nürburgring, a track known for its demanding conditions. While Nürburgring lap times may seem distant from everyday driving, the technologies in the SU7 Ultra also power the Xiaomi SU7, ensuring high performance and reliability for everyday use. This testing will demonstrate the SU7 Ultra’s potential to deliver robust performance even under extreme conditions, making it an exciting prospect for automotive enthusiasts.
Source: IT-Home
