Xiaomi SU7 Ultra the Nürburgring Nordschleife World’s Fastest Four-Door Car as of 28th October 2024.
This is described as a CATL Qilin 2.0 battery.
Maximum pack voltage = 897V
If we assume a maximum cell voltage of 4.2V then 897/4.2 = 213.57 now it has to be an integer and the cell maximum voltage might be 4.25V then 897/4.25 = 211.06 looks like the pack is configured as 212s and quite different to the Xiaomi SU7 Max battery.
As one of the most powerful mass-produced battery packs available, it delivers a maximum discharge rate of 16C and a maximum discharge power of 1330kW. When the power is only 20% left, the discharge power can still reach 800kW.
Some quick estimations based on OCV and discharge power capability suggests that the pack resistance would need to be <0.12 Ohm to achieve this. You can estimate this using the Battery Power Demand Solution.
This post has been built based on the support and sponsorship from: Thermo Fisher Scientific, Eatron Technologies, About:Energy, Quarto Technical Services and Alvatek.
Cooling
The battery pack features dual large-surface active cooling to ensure stronger battery heat dissipation capabilities and safety guarantees.
Charging
The highest charging rate is 5.2C, enabling 10% to 80% charging in just 11 minutes. The CLTC range reaches 630km, combing high performance and long range.
Structural
Integrating Xiaomi’s CTB battery technology for higher volume efficiency.
These calculations are based on limited data that has been released for the battery specifications, please do share any references and reports that can extend this analysis.
References
- Xiaomi SU7 Ultra Unveiled: The Ultimate Performance Technology Sedan, mi.com
- Xiaomi SU7 Ultra is 1527bhp super-saloon with Prodrive engineering, Autocar
- Xiaomi SU7 Ultra Prototype, Xiaomi
See also: CATL, Pack Internal Resistance