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Semi-Solid State Battery Technology is Ready for the China Market On August 5, 2025, Chinese automaker SAIC unveiled the 2nd generation of its MG4, which can be powered by a semi-solid-state battery jointly developed by SAIC and Qingtao New Energy. In December, SAIC MG announced it had delivered the first MG4 with the new technology at a price point of $14.5k. The positive electrode uses lithium-rich manganese-based materials (LMO). The company claims that liquid electrolyte content is reduced to 5%, which will significantly reduce the risk of combustion and improve cycle life.
Electrical Performance
Safety Performance
Power: -20 °C, power is not limited between 25% and 100% SOC; Charging: -20°C, from 10% to 80%, within 43.2 minutes; Retention: -20 °C, 1C discharge, the capacity retention > 100%, and the energy retention > 91%; Cycle life: 3,000 cycles at room temperature with a 1C charge and discharge.
Source: BiliBili - MG4预售发布会
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