# CBAK Energy sodium-ion battery production expansion > Live situation record from CLSTR: https://clstr.news/situations/cbak-energy-sodium-ion-battery-production-expansion > Updated: 2026-09-23T21:39:40.000Z. Sources: 5. Developments: 2. CBAK Energy Technology Limited has initiated plans to expand its battery production capacity, specifically targeting a 12 GWh annual output for sodium-ion batteries. The company reported successful internal testing of its 32140 NH-7Ah sodium-ion cells, which utilize a sodium iron phosphate pyrophosphate cathode and demonstrated performance across a temperature range of −40°C to 70°C. Following these technical developments, CBAK Energy signed a conditional investment agreement with the Nanjing Gaochun Economic Development Zone to establish a 12 GWh project in Nanjing, China. This new facility is designed for manufacturing flexibility, allowing production lines to switch between sodium-ion and lithium-ion cells based on market demand. The company estimates that at full capacity, the project could generate annual revenue between RMB 4.8 billion and RMB 5 billion. This project is distinct from an existing expansion at the company’s current Nanjing site, which aims to increase capacity from 4.5 GWh to 10.5 GWh by the end of 2026. ## Timeline ### 2026-09-23: CBAK Energy signs agreement for 12GWh battery project in Nanjing CBAK Energy has signed an agreement for a 12GWh battery project in Nanjing, featuring flexible production lines for both sodium-ion and lithium-ion cylindrical cells. 2 sources. https://clstr.news/cluster/cbak-energy-signs-agreement-for-12gwh-battery-project-in-nanjing ### 2026-09-17: CBAK Energy outlines 12 GWh sodium-ion battery production plan CBAK Energy announced plans for 12 GWh of annual sodium-ion battery capacity, as the industry shifts toward sodium-ion technology to mitigate lithium price volatility and diversify supply chains. 3 sources. https://clstr.news/cluster/cbak-energy-outlines-12-gwh-sodium-ion-battery-production-plan --- Cite as: CBAK Energy sodium-ion battery production expansion. CLSTR, https://clstr.news/situations/cbak-energy-sodium-ion-battery-production-expansion