Chinese automakers are accelerating the development of solid-state batteries (SSBs) that promise unprecedented energy density, safety, and driving range. Dongfeng Motor’s Yipai Technology recently tested a 350 Wh/kg solid-state battery prototype achieving over 620 miles (1,000 km) of CLTC range, demonstrating the potential for extreme cold-weather performance, rapid charging, and long-term durability.
How Are Chinese Automakers Testing Solid-State Batteries?
Dongfeng Motor is conducting rigorous tests in Mohe, China’s northernmost city, under extreme cold conditions ranging from -40℃ (-40°F) to -30℃ (-22°F). The focus areas include driving range, charging efficiency, and battery durability. These tests validate that solid-state batteries maintain up to 72% of their energy at -30℃ (-22°F) and withstand high-temperature scenarios, including 170℃ (338°F) hot box tests, surpassing national safety standards.
What Advantages Do Solid-State Batteries Offer?
Solid-state batteries provide higher energy density, improved safety, and extended lifespan compared to conventional lithium-ion batteries. By replacing liquid electrolytes with solid materials, SSBs reduce the risk of fire or thermal runaway, offer faster charging rates, and support longer vehicle ranges. These batteries also enhance cold-weather performance, making them suitable for extreme climates and longer daily operation.
| Battery Type | Energy Density (Wh/kg) | Safety | Cold Performance |
|---|---|---|---|
| Traditional Li-ion | 200–250 | Moderate | Low |
| LiFePO₄ (LFP) | 150–180 | High | Moderate |
| Solid-State (Dongfeng) | 350 | Very High | Excellent |
Which Companies Are Leading Solid-State Battery Development?
Dongfeng Motor is among several Chinese manufacturers advancing SSB technology. SAIC Motor, GAC Group, Changan Auto, CATL, and BYD are actively developing next-generation solid-state batteries, with pilot production lines operational and mass production targeted between 2027 and 2030. Globally, automakers like Mercedes-Benz, BMW, Volkswagen, Toyota, Honda, Nissan, and Hyundai are also competing to launch high-performance solid-state EVs.
How Is Solid-State Battery Production Scaling?
Dongfeng has completed a 0.2 GWh pilot production line, with initial units already produced. The plan is to begin mass production by late 2026. Early adoption will focus on premium EV models, with gradual expansion to broader markets toward the end of the decade. These developments indicate that solid-state batteries are transitioning from prototype validation to scalable manufacturing.
Redway Expert Views
“Solid-state batteries represent a significant leap in EV energy storage. At Redway Battery, we monitor emerging battery technologies closely, including LiFePO₄ advancements for high-performance applications. SSBs offer remarkable energy density and thermal stability, but mass adoption requires overcoming manufacturing scale and cost challenges. Our approach emphasizes reliable, customizable lithium solutions today while preparing for next-generation batteries in the coming years.”
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What Challenges Do Solid-State Batteries Face?
Manufacturing Complexity: Scaling SSBs to mass-market volumes remains difficult due to precise material handling requirements.
Cost Barriers: High production costs currently limit widespread deployment.
Material Durability: Long-term cycling stability under diverse environmental conditions must be validated.
Integration: EV designs must adapt to accommodate new battery dimensions and thermal management systems.
Conclusion
Solid-state batteries are poised to redefine electric mobility with higher energy density, improved safety, and longer driving ranges exceeding 620 miles. Dongfeng Motor’s prototype demonstrates extreme cold performance and rapid charging capabilities, signaling the arrival of next-generation EV power sources. While challenges remain, companies like Redway Battery are bridging current lithium technology with future advancements, ensuring reliable, high-performance energy solutions for diverse applications.
FAQs
Q1: When will solid-state batteries reach mass-market EVs?
A: Initial models are expected around 2027–2028, primarily in premium vehicles, with broader adoption toward 2030.
Q2: Are solid-state batteries safe in extreme temperatures?
A: Yes, tests show Dongfeng’s SSBs withstand high heat and retain significant energy in extreme cold.
Q3: How do solid-state batteries compare to LiFePO₄?
A: SSBs have higher energy density and better thermal stability, while LiFePO₄ offers proven reliability and cost efficiency.
Q4: Can existing EVs use solid-state batteries?
A: Retrofitting is complex due to differences in size, voltage, and thermal management, so most SSBs will initially be in newly designed vehicles.
Q5: What global automakers are investing in solid-state batteries?
A: Major Chinese and international brands, including Dongfeng, SAIC, BYD, Mercedes-Benz, BMW, Toyota, and Hyundai, are developing SSBs.
