A BMW iX3 Long Wheelbase prototype completed a public-road loop of more than 497 miles (800 kilometers) around Qinghai Lake in China without recharging, finishing with 2% battery capacity remaining. The iX3 50L xDrive test vehicle, fitted with 21-inch aerodynamic wheels, averaged roughly 4.9 miles per kWh (12.6 kWh per 100 kilometers) over the route, according to BMW Group. The company reports the result indicates a total range potential of 519 to 522 miles (835 to 840 kilometers) under the conditions of the challenge.
Highlights
- The prototype departed Xining and returned to its starting point after more than 497 miles (800 km) of driving on public roads, finishing with 2% battery capacity remaining.
- BMW reports average energy consumption of 12.6 kWh per 100 kilometers, equivalent to roughly 4.9 miles per kWh.
- The route climbed from approximately 7,200 feet (2,200 meters) above sea level to nearly 13,100 feet (4,000 meters), with repeated ascents and descents.
- The vehicle carries BMW’s sixth-generation high-voltage battery with 108.7 kWh of usable energy.
How Demanding Were the Test Conditions?
The challenge ran entirely on public roads under live traffic conditions, an environment BMW says was designed to reflect everyday customer use. Starting in Xining, the vehicle climbed and descended across an altitude difference of almost 6,600 feet (2,000 meters), placing continuous load on drivetrain efficiency, energy management, and thermal control.
Weather compounded the difficulty. The vehicle encountered heavy snowfall, intense rain, and strong high-altitude sunshine, with ambient temperatures ranging from 34°F to 70°F (1°C to 21°C). The entire route was driven in Efficient mode, which the company says balances comfort and energy efficiency in line with long-distance everyday driving.
Neue Klasse Technologies Behind the Result
BMW attributes the outcome to the integrated systems of the Neue Klasse platform rather than any single technology. Key contributors, per the company:
- Aerodynamic concept that minimizes energy losses at higher speeds.
- Energy Master, BMW’s in-house energy management system, which distributes energy based on route profile, temperature, and driving conditions.
- Sixth-generation high-voltage battery with newly developed cylindrical cells and 108.7 kWh of usable energy, which BMW says delivers higher energy density while improving packaging, weight, and vehicle rigidity.
- Newly developed drivetrain pairing an electrically excited synchronous motor with an asynchronous motor, which the company reports cuts energy losses by up to 40% and lifts overall drivetrain efficiency by up to 20%.
Recuperation and Thermal Management
The Heart of Joy control system works with the vehicle’s energy recuperation technology to recover energy during deceleration and downhill driving. BMW says recuperation alone can handle braking in up to 98% of everyday driving situations.
Thermal management carried particular weight on this route, where cold mornings, warmer afternoons, and rapid transitions between rain and snow demanded precise responses from battery and cabin systems. The integrated thermal management system maintains stable operating conditions, supporting both occupant comfort and consistent range, according to the company.
The iX3 is the first model of the BMW Neue Klasse, and BMW positions the Qinghai result as real-world validation of the generation’s system-level efficiency approach.
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