On January 15, 2026, Dongfeng Motor Corporation Passenger Vehicle Company officially announced last night that the launch ceremony for the winter testing of the Dongfeng solid-state battery prototype was held in Wuhan. The prototype vehicle, equipped with Dongfeng Automobile's 350Wh/kg solid-state battery, officially departed for the Mohe cold region test base in Northeast China, beginning several weeks of extreme cold weather testing in temperatures ranging from -40℃ to -30℃. This test marks a crucial step in the development of China's solid-state battery technology, moving from the laboratory to real-world climate validation, and lays a solid foundation for mass production and vehicle integration in September 2026.
|
project |
parameter |
Technical Specifications |
|
Battery energy density |
350Wh/kg |
It adopts a high-capacity ternary cathode + silicon-carbon anode + oxide polymer composite solid electrolyte, which improves efficiency by more than 50% compared with mainstream liquid lithium batteries. |
|
Overall vehicle range |
Over 1000 kilometers |
Taking a 600kg battery pack as an example, the capacity can reach over 200kWh, completely eliminating range anxiety. |
|
Low-temperature energy retention rate |
72% at -30℃ |
With a power efficiency far exceeding that of traditional ternary lithium batteries (60% higher), heating in northern winters will no longer "drop power." |
|
Charging speed |
80% energy replenishment in 10 minutes |
Equipped with a Mach-level ultra-1000V pure electric platform, supporting a 1200V high-voltage architecture and 1700V silicon carbide modules, it can achieve a range of 450 kilometers with a minimum of 5 minutes of charging. |
|
Safety performance |
in a 170℃hot box |
The national standard is 130℃. This battery does not burn or explode under extreme conditions such as nail penetration and 50% compression, and is inherently safe. |
|
Cycle life |
≥1000 cycles |
Even after 20 years of use, the battery's health rate remains above 80%, far exceeding the lifespan of traditional batteries. |
|
Expectedmass production time |
September 2026 |
A 0.2GWh pilot production line has been built, and the cell qualification rate has remained stable at over 98%. |
This winter test was conducted in Mohe, covering three core dimensions: low-temperature range, low-temperature charging, and low-temperature durability. Over 70 rigorous tests were completed:
Range Stability: In a -40℃ environment, the vehicle's actual range achievement rate remained above 70%, without any "cliff-like decline";
Low-Temperature Charging Efficiency: The DC fast charging rate retention rate reached as high as 85%, far superior to the typical level of less than 50% for traditional batteries at -25℃;
System Synergy: The vehicle's thermal management system precisely controlled the battery temperature, maintaining the optimal operating range with only a small amount of energy consumption;
Structural Reliability: After repeated hot and cold cycles, the battery pack showed no cracking, no leakage, and no performance degradation, demonstrating excellent structural integrity. “This isn't laboratory data; these are results from real-world road tests.” – Head of Dongfeng R&D Team
Dongfeng Automobile is not a newcomer to this field:
December 2021: Obtained the first domestic approval for a solid-state battery passenger car, equipped in the Dongfeng Fengshen E70;
January 2022: The high-energy-density solid-state battery jointly developed with Ganfeng Lithium passed the MIIT's approval and received the "New Energy Vehicle Model Exempt from Vehicle Purchase Tax" certification;
Cumulative road tests: By the end of 2025, over 2.3 million kilometers of real-vehicle testing had been completed in five provinces and ten cities, including Heilongjiang, Jilin, and Inner Mongolia, covering high-temperature, high-humidity, and extreme cold conditions, setting a global record.
The MIIT's "Action Plan for High-Quality Development of the New Energy Storage Manufacturing Industry" explicitly supports solid-state battery technology research. As the only enterprise to achieve a complete closed loop of "approval + demonstration operation + pilot production," Dongfeng has established its leading position in the industry.
|
enterprise |
technical route |
Energy density |
Expected mass production time |
Features |
|
DongFeng Automobile |
Oxide polymer composite solid |
350Wh / kg |
September 2026 |
Prioritizing safety, controlling costs, and adapting to mass production, it primarily targets the home market. |
|
BYD |
Sulfide + High Nickel Ternary |
400Wh/kg |
2027 |
High energy density, but with significant cost and technological challenges. |
|
Gotion High-tech |
Sulfide electrolytes |
350Wh/kg |
Small batches in 2027 |
The material cost is low, but its air stability still needs to be optimized. |
|
CATL |
sulfides |
350–400Wh/kg |
2027 |
Joint testing with Mercedes-Benz and BMW, focusing on the high-end market. |
|
CHERT |
All solid state |
600Wh/kg |
Verified in 2027 |
Significant breakthroughs have been achieved in the laboratory, but the path to industrialization remains unclear. |
Dongfeng's choice of 350Wh/kg is not a technological compromise, but the optimal solution for industrialization: achieving a golden balance between safety, cost, lifespan, and performance, paving the way for the 150,000 RMB-level household market.
Future plans: The path from semi-solid to all-solid-state batteries
September 2026: Mass production of 350Wh/kg semi-solid-state batteries, first launched in Dongfeng eπ 007/008 models;
December 2027: Pilot production of fast-charging 350Wh/kg all-solid-state batteries;
From 2028 onwards: The research results of 500Wh/kg sulfide all-solid-state batteries will be gradually implemented, with a driving range exceeding 1200 kilometers.
Dongfeng did not chase the "numerical competition" of 500Wh/kg, but instead spent seven years transforming laboratory solid-state batteries into "real cars" that can withstand the harsh winds of Mohe and be driven by thousands of households. While others are still talking about "energy density," Dongfeng has redefined the ultimate electric vehicle experience with safety, cold-weather performance, fast charging, and affordability.
By 2026, China's new energy vehicles may truly usher in an era of "anxiety-free driving."
