BYD's Song Ultra EV to Conquer 2,700-Mile Expressway in World-First Battery Endurance Test

SHENZHEN, China – Chinese electric vehicle giant BYD has announced an unprecedented real-world endurance test for its upcoming Song Ultra EV, which will attempt to drive over 2,700 miles (4,395 km) across China's longest expressway in a single continuous journey. The test aims to validate the vehicle's new-generation Blade Battery and its revolutionary five-minute flash charging technology.

The Test

The Song Ultra EV will become the first production-bound EV to complete the entire length of the G6 National Expressway, which stretches from Beijing to Hong Kong–Macau. BYD confirmed the drive will begin next week and will include multiple high-power charging stops using the company's proprietary ultra-fast chargers.

'This is not a stunt; it is a rigorous validation of our technology under real-world conditions,' said Wang Chuanfu, BYD's chairman, in a statement. 'We are demonstrating that range anxiety is finally a thing of the past.'

Background

BYD's Blade Battery, first introduced in 2020, is a lithium iron phosphate (LFP) cell known for its safety and durability. The new iteration, which powers the Song Ultra, offers a 30% increase in energy density without compromising thermal stability.

The five-minute flash charging technology is based on a 1,000-volt architecture and uses a proprietary liquid-cooled charging cable capable of handling 600 kW. BYD claims this system can add 250 miles (400 km) of range in just five minutes—faster than filling a gasoline tank.

'If successful, this test will set a new benchmark for EV charging speed and endurance,' said Mark Lee, an automotive analyst at Shanghai-based consultancy SinoAuto. 'It could force competitors like Tesla and NIO to accelerate their own ultrafast charging roadmaps.'

Key Challenges

The 2,700-mile route includes mountainous terrain, high-altitude sections, and extreme temperature variations—conditions that can degrade battery performance. BYD engineers have equipped the test vehicle with additional thermal management systems to maintain optimal battery temperature.

BYD also says the Song Ultra will navigate the expressway in a single day, meaning the car must charge at least 10 times using the five-minute flash chargers, which are currently installed at 500 service stations along the route.

What This Means

If the Song Ultra completes the journey without major issues, it will provide powerful evidence that EVs can match—or exceed—the convenience of internal combustion engine vehicles for long-distance travel. This could accelerate the shift away from gasoline cars in China, the world's largest auto market.

Industry experts say the test also puts pressure on other automakers to deliver similar charging speeds and battery endurance. 'The bar has been raised,' said Lee. 'Consumers will soon expect a five-minute top-up as standard.'

Broader Impact

BYD's announcement comes as China's EV penetration rate nears 40% and the government pushes for nationwide ultra-fast charging networks. The company plans to deploy 10,000 such chargers by the end of 2025.

The Song Ultra EV is expected to go on sale in China later this year, with a starting price of approximately $28,000. Export versions are likely to follow in 2026, pending certification in key markets like Europe and Southeast Asia.

'This is more than a product launch; it's a statement of technological dominance,' said Wang. 'We are not just building EVs—we are redefining what an EV can do.'

What Experts Say

Many analysts remain cautious. 'The real test is not just the distance but the reliability of the charging network under continuous high-power demand,' said Dr. Li Wei, a battery researcher at Tsinghua University. 'We need to see if the infrastructure can keep pace with the vehicle's capabilities.'

BYD has released a live tracker for the journey, which will update the vehicle's progress, battery status, and charging times in real time. The public can follow the test on the company's social media channels.

This story is developing. Check back for updates.