The Chinese automotive group BAIC has announced advancements in its sodium-ion battery development. According to the company, a prototype has completed the development phase. BAIC is using this technology to expand its Aurora battery platform, which now includes lithium-ion, solid-state, and sodium-ion batteries.
The presented battery is based on a prismatic cell format. BAIC claims that the energy density of a single cell exceeds 170 Wh/kg. Additionally, the battery is said to offer fast charging at 4C. The company also highlights the battery’s performance under extreme temperatures. The battery reportedly operates stably within a temperature range of -40 to 60 °C and achieves over 92 percent of its energy output at -20 °C.
BAIC emphasizes that the battery did not catch fire or explode during stress tests involving overcharging, exposure to heat, and mechanical stress. The company views this as exceeding current Chinese safety standards. However, no independent tests or detailed test conditions are mentioned.
According to BAIC, development work on the prototype is complete. Additionally, a production process for the prismatic cells has been defined. The company claims to have filed around 20 patents, including those for materials, electrolytes, and system integration.
Source:
https://cnevpost.com/2026/03/20/baic-unveils-sodium-ion-battery-breakthrough/
