CATL Targets Battery Swap Stations to Overcome Sodium-Ion Range Limitations

Battery giant CATL is tackling the primary drawback of sodium-ion technology—lower energy density and restricted driving range—by integrating these packs into its proprietary Choco-Swap network. Speaking at a Benchmark Mineral Intelligence event in Shanghai, Chairman Robin Zeng explained that while sodium-ion cells comfortably manage daily urban commuting, battery swap infrastructure can efficiently service longer weekend journeys without requiring long charging stops.

Sodium-ion chemistry offers notable advantages, including cost parity with LFP cells, resistance to lithium price volatility, enhanced safety due to non-flammable electrolytes, and strong cold-weather performance. Notably, the sodium-ion cells revealed in a vehicle partnership with Changan in February achieve up to 175 Wh/kg for a range exceeding 400 kilometers (around 249 miles) and retain over 90% capacity at -40°C (-40°F). By utilizing rapid battery swapping instead of stationary charging, the impact of lower energy density is effectively minimized.

To support this infrastructure push, CATL operates swap stations in approximately 200 Chinese cities and aims to scale its Choco-Swap network past 3,000 passenger car stations nationwide by the conclusion of 2026. This builds on an existing footprint of 1,020 stations across 45 cities recorded in December 2025. Although production volumes remain modest—with 10,000 to 20,000 electric vehicles projected to adopt sodium-ion batteries in 2026—CATL has backed its strategy with a $735 million investment dedicated to 40 GWh of manufacturing capacity.