On August 5, 2025, BYD officially announced the completion of a major upgrade to its fifth-generation DM technology, reducing NEDC fuel consumption to 2.6L/100km, a further 10% reduction compared to the 2.9L version released in May 2024. The technology has also been certified by the National Automotive Quality Inspection and Testing Center (Guangdong). This breakthrough marks the official entry of Chinese hybrid technology into the "2.5L fuel consumption era," continuing its global lead in plug-in hybrid technology development.
Equipped with a newly optimized hybrid-specific engine, upgraded with split cooling technology and an exhaust gas recirculation system, thermal efficiency has been further improved from 46.06% to the 47% range (specific figures pending official confirmation), with combustion control accuracy reaching 0.1 milliseconds. Tests show that warm-up speed in -30°C extreme cold is 45% faster than that of Japanese competitors.
The interchangeability between the generator and drive motor has been enhanced, and the number of operating modes has been expanded from 11 to 13, with the addition of "Super Economic Cruise Mode" and "Limited Battery Hold Mode." The integrated motor-generator design reduces the vehicle's volume by 18%, freeing up an additional 2.3 kWh of battery capacity.
Based on the upgraded VCU system based on Huawei's MDC computing platform, the deep learning algorithm adds a "terrain prediction" function that can adjust power distribution strategy up to 10 kilometers in advance based on high-precision maps. The latest German TÜV testing shows that this system achieves 21% fuel savings compared to the Honda i-MMD under WLTC conditions.
Sales confirm technological leadership: BYD's monthly sales reached 382,500 units in May 2025, with the Qin L DM-i and Haibao 06 DM-i, equipped with fifth-generation DM technology, contributing over 150,000 units.
Cost Revolution: The Qin PLUS DM-i 2025 model's starting price has dropped to 71,800 yuan, with a measured range of 1,382 kilometers, achieving a "refueling every two months" goal.
Industry Chain Collaboration: CATL's CTP battery pack has increased its energy density to 260Wh/kg, and in conjunction with the electronic control system, it achieves a 98% battery utilization rate.
Data from China's Ministry of Industry and Information Technology (MIIT) in the first half of 2025 shows that hybrid vehicles accounted for 6.6% of the new energy light truck market. BYD's technological breakthroughs are expected to drive this proportion upward. Analysts point out that the continued evolution of fifth-generation DM technology is accelerating the exit of traditional fuel vehicles from the family car market. BYD Executive Vice President Lian Yubo said, "This is not only a breakthrough in fuel consumption figures, but also a victory for the systematization capabilities of China's automotive industry."