Rigorous testing refines excellent technology, and the extreme cold challenge witnesses ultimate quality. In recent years, winter testing has become an essential part of evaluating the overall performance of new energy vehicle models. Starting from December 2023, BYD Commercial Vehicles assembled a lineup of 21 main models, including pure electric buses, seated coaches, tour buses, light trucks, school buses, tractors, mixers, and dump trucks, for a daring expedition into the extreme cold of Heihe City, Heilongjiang Province, China. The 138-day high-altitude extreme challenge involved comprehensive reliability and adaptability tests in all-weather extreme cold weather and various road conditions, validating the limit performance of new energy products.
As the preferred location for national cold zone automobile winter testing, Heihe is covered in snow, with temperatures plummeting to -40°C. To fully verify product performance and overcome challenges, the BYD Commercial Vehicles engineering team ensured the completion of more than 80 detailed test procedures across nine categories, including overall vehicle subjective evaluation, heating performance, braking tests, energy consumption and range, low-temperature charging, sealing tests, battery thermal management performance, and low-temperature storage.
Among them, low-temperature charging and vehicle range, the most concerning product performance for users in winter scenarios, were addressed by BYD Commercial Vehicles with the new generation battery liquid cooling and heating management system. This system enables the blade battery to maintain optimal charging performance even in extreme cold conditions, ensuring the best operation of the battery pack and effectively guaranteeing the overall vehicle range.
In addition to previous extreme cold testing projects, BYD added new items such as ice driving anti-skid, ice ring tests, slope parking, and more. The results were satisfying: for example, the all-new hybrid light truck T5DM, equipped with the standard electronic stability control system, intervened precisely under extremely low traction coefficient conditions, ensuring stable driving. In snow testing, thanks to BYD’s industry-first BSC brake system for light trucks, the T5DM’s braking capability significantly improved, response speed increased fourfold, and emergency braking performance increased by 50%.
With meticulous attention to detail, the 21 models performed excellently, completing various scenario-based tests and proving to the market that BYD Commercial Vehicles’ current flagship products meet the driving and operational needs of complex winter road conditions, ensuring reliable and trustworthy products for every user.
Driven by technological innovation, the new quality productivity is a powerful force propelling the high-quality development of China’s new energy commercial vehicle industry. The Heihe ice and snow journey once again verified BYD Commercial Vehicles’ comprehensive leadership in product performance, reliability, safety, and adaptability. In the future, BYD will continue to uphold technology supremacy, continuously expand the scale of new energy commercial vehicle development, delve into green technology, and illuminate more green dreams worldwide.
