Hongqi Ultra-Fast Charging Battery Reaches 10%-70% SOC in Just 3 Minutes 41 Seconds, Peaking at 12C

FAW Group recently announced that the ultra-fast-charging battery co-developed by its Hongqi brand and China Automotive New Energy has successfully completed charging performance tests under 25°C ambient conditions. Test results show that the battery can be charged from 10% to 70% state of charge (SOC) in just 3 minutes and 41 seconds, and from 10% to 97% SOC in 8 minutes and 3 seconds. The battery employs a high-efficiency ultra-fast-charging anode material that overcomes conventional cell charging rate limitations, achieving a peak charging capability of 12C. It also features a proprietary electrolyte with low desolvation energy, which reduces lithium-ion migration resistance. Through composite carbon-source coating and bulk-phase doping modification technologies, the battery’s internal resistance is reduced by 15% compared to cells of the same chemistry, significantly enhancing charge transfer efficiency and charging response speed. In terms of thermal management, the battery is equipped with an intelligent uniform-temperature liquid cooling system that maintains a pack-wide temperature difference of less than 3°C during fast charging. Combined with a multi-scenario, tiered thermal control strategy, the system adaptively adjusts thermal management modes according to different operating conditions—such as driving or parking—to keep the battery within its optimal operating temperature range and reduce thermal management energy consumption. Additionally, the battery incorporates a safety-boundary-based adaptive fast-charging strategy that continuously monitors and limits the cell temperature rise rate, dynamically adjusting charging power output. The system performs real-time closed-loop verification of cell voltage and state of charge, ensuring minimal charging time while preventing anomalies such as overcharging and overvoltage, thereby establishing a multi-layered safety protection mechanism.