Key Takeaways
1. Dongfeng’s solid-state battery achieves an energy density of 350 Wh/kg, enabling mass production by 2026, despite being lower than the theoretical maximum of 500 Wh/kg.
2. The battery is designed to provide an electric vehicle range of 1,000 km, potentially exceeding 400 miles in U.S. conditions.
3. Solid-state batteries enhance safety by eliminating volatile liquid electrolytes and perform better in extreme temperatures, with 72% capacity retention at -30°C.
4. The new battery successfully endured high-temperature tests up to 170°C, well above the required threshold.
5. Dongfeng is developing a fast-charging version compatible with 2 MW chargers and aims for a battery approaching 500 Wh/kg energy density by 2027, in line with other industry leaders.
A new solid-state battery created by a prominent automaker from China has successfully completed key performance and safety evaluations and is now entering pilot production.
Battery Performance and Specifications
Dongfeng’s inaugural solid-state battery generation boasts an energy density of 350 Wh/kg. While this figure is lower than the theoretical maximum of 500 Wh/kg for this technology, it is reportedly stable and economically viable enough to commence mass production by 2026. This is arguably more significant for proving the practicality of solid-state batteries in electric vehicle powertrains than merely pursuing the highest specifications with lab prototypes.
Dongfeng claims that its initial solid-state battery will enable an electric vehicle range of 1,000 km while maintaining the same size as current batteries utilizing liquid electrolytes. This range is likely based on China’s CLTC cycle, which is roughly one-third less stringent than the EPA’s standards, suggesting that the equivalent range in the U.S. could exceed 400 miles on a single charge in real-world conditions.
Advantages of Solid-State Batteries
Beyond their higher energy density, solid-state batteries offer numerous other benefits. Their design eliminates the volatile liquid electrolyte, enhancing safety. Additionally, they can be charged more quickly and maintain their capacity much more effectively in extreme temperatures. For Dongfeng’s solid-state battery, which is set to begin mass production next year, tests at cold temperatures showed a remarkable capacity retention of 72% at -30°C (-22 degrees Fahrenheit). This performance is 20% better than conventional lithium batteries with liquid electrolytes, making it suitable for electric vehicles in colder regions.
The new solid-state battery has also successfully undergone high-temperature testing, known as the hot box test, and demonstrated its ability to endure temperatures as high as 170°C (338 degrees Fahrenheit), significantly exceeding the required threshold of 130°C.
Future Developments
Dongfeng indicates that it is also developing a fast-charging version of its solid-state battery, which will be compatible with 2 MW chargers. Additionally, the company is working toward a solid-state battery that approaches the theoretical 500 Wh/kg energy density of sulfide-based technology, although production of this model isn’t anticipated until after 2027. This timeline aligns with other major industry players, such as CATL, Samsung, and Toyota, who have committed to launching vehicles equipped with true solid-state batteries in the same period.
Source:
Link
Leave a Reply