CATL Sodium-ion Battery technology is moving beyond pilot lines and into mass production. CATL and Changan say a passenger vehicle with sodium-ion batteries will reach the market in mid-2026. That launch signals an important step for Electric Vehicles. It also shows how sodium-ion and Lithium-ion can work together in a practical dual-chemistry system.
At the center of this effort is CATL’s Naxtra architecture. The company says its Naxtra sodium-ion battery reaches up to 175 Wh/kg. In addition, its Cell-to-Pack design and battery management system support an electric driving range of more than 400 km. CATL also expects future pure-electric variants to reach 500 km to 600 km as the supply chain matures.
CATL sodium-ion battery reaches key performance levels
CATL designed Naxtra to deliver strong performance in real-world conditions. First, the battery offers up to 175 Wh/kg energy density. That figure places sodium-ion closer to mainstream EV use. Second, the system delivers more than 400 km of range today. Moreover, CATL sees a path to 500 km to 600 km in future versions.
The company also focuses on low-temperature performance. According to CATL, the battery delivers nearly three times the discharge power of similar LFP batteries at -30 °C. It also retains more than 90% of its capacity at -40 °C. Even at -50 °C, it maintains stable power delivery. As a result, the chemistry fits regions with harsh winters and demanding operating environments.
How CATL sodium-ion battery improves cold-weather EV performance
Cold weather often reduces battery efficiency. However, sodium-ion chemistry handles low temperatures well. Sodium ions form weaker bonds with the electrolyte than lithium ions do. Therefore, sodium ions can move more easily when the electrolyte thickens in the cold.
This behavior helps the battery sustain output in winter conditions. It also supports steadier vehicle performance when temperatures drop. For drivers, that means more dependable power delivery in cold climates. Consequently, CATL positions sodium-ion as a strong complement to lithium-ion in EV packs.
CATL does not treat sodium-ion as a standalone replacement in every case. Instead, it combines sodium-ion and lithium-ion to use the strengths of both chemistries. Lithium-ion still brings high energy density. Meanwhile, sodium-ion adds strong low-temperature behavior. Together, they create a more flexible battery strategy.
How CATL sodium-ion battery fits existing manufacturing
Another reason Naxtra stands out is manufacturing compatibility. Sodium-ion batteries share a similar cell structure with commercial lithium-ion batteries. Each battery uses four core parts: a cathode, an anode, an electrolyte, and a separator. Because of that similarity, manufacturers can adapt much of today’s battery production equipment with only minor changes.
During charging, sodium ions move from the cathode to the anode. At the same time, current flows through the external circuit in the opposite direction. During discharge, the ions return to the cathode. This process is known as the rocking-chair principle. Notably, lithium-ion batteries use the same basic mechanism. Therefore, sodium-ion can scale more efficiently within existing battery factories.
CATL also benefits from a lower-cost material choice. Lithium-ion batteries need copper foil on the anode because lithium alloys with aluminum at low voltages. Sodium behaves differently. It does not alloy with aluminum in the same way. As a result, sodium-ion batteries can use aluminum foil for both the cathode and the anode.
That change brings two clear benefits. First, aluminum lowers battery weight. Second, it cuts collector cost by about 70%. Those savings can support broader adoption and more efficient manufacturing economics.
CATL sodium-ion battery and Naxtra architecture enable a dual-chemistry future
CATL’s battery management system plays a central role in this design. The BMS manages both sodium-ion and lithium-ion chemistries inside the vehicle system. It balances their performance characteristics in real time. In practice, that means the vehicle can draw on lithium’s energy density and sodium’s cold-weather strength when needed.
In addition, CATL pairs this chemistry strategy with Cell-to-Pack integration. That pack-level design helps improve space use and supports competitive vehicle range. When combined with smart BMS control, the Naxtra architecture shows how battery systems can become more adaptable without straying from proven manufacturing methods.
Overall, CATL and Changan present a clear path for sodium-ion commercialization. The Naxtra platform combines 175 Wh/kg energy density, more than 400 km of range, and strong performance from -30 °C to -50 °C. Furthermore, it uses familiar production methods and lower-cost aluminum collectors. For the EV market, that makes sodium-ion more than a lab concept. It makes it a practical battery option for mass-produced vehicles in 2026 and beyond.
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