CATL Introduces Sodium-Ion Batteries with Exceptional Cold Resistance for Electric Vehicles

• January 24, 2026

CATL has announced a new development in battery technology with the introduction of its Tianxing II sodium-ion batteries, designed to maintain performance in extremely low temperatures. These batteries reportedly preserve up to 90% of their nominal capacity even at minus 40 degrees Celsius, representing a significant advancement for electric vehicles (EVs) operating in cold climates.

The Tianxing II model builds on the advantages of sodium-ion battery chemistry, which has demonstrated superior resilience in freezing conditions compared to many lithium-ion variants. While solid-state battery production faces ongoing challenges with mass manufacturing, sodium-ion batteries offer a practical alternative that addresses cold weather limitations.

CATL’s announcement highlights the growing focus on developing traction batteries capable of reliable operation in harsh environments. By ensuring close to full capacity retention down to -40°C, these batteries aim to improve EV range and usability in markets with extreme winters, where existing battery technologies often suffer significant performance losses.

While exact details such as production volumes, cost, or deployment timelines were not disclosed, CATL’s sodium-ion solution is positioned for integration into passenger electric vehicles, marking a step toward wider adoption of cold-resistant battery systems.

Advancing Battery Solutions Amid Industry Trends

The electric vehicle battery sector is currently exploring multiple approaches to overcome limitations of traditional lithium-ion cells. These challenges include energy density, safety, and environmental constraints. Sodium-ion batteries have emerged as a notable contender due to abundant raw materials and favorable low-temperature characteristics. Major battery manufacturers and automakers are increasingly investing in alternative chemistries to diversify supply chains and enhance performance in a variety of operating conditions.

CATL’s development reflects a broader industry trend to innovate beyond lithium-ion technology to meet evolving EV market demands. As customers in regions with harsh winters seek dependable vehicle performance, cold-tolerant batteries may become a key differentiator. The announcement positions sodium-ion batteries as a strategic option while efforts toward commercial-scale solid-state battery production continue.

Looking ahead, the adoption of Tianxing II batteries in passenger EVs will be an important milestone to watch. Updates regarding manufacturing scale, vehicle integration, and commercial availability will provide further insights into how CATL’s sodium-ion technology impacts the competitive landscape of electric mobility solutions.

CATL unveils Tianxing II sodium-ion batteries retaining up to 90% capacity at minus 40°C, targeting enhanced EV performance in extreme cold.