Geely's Innovation: Megawatt Charging Without Compromising EV Battery Life







Chinese automakers are rapidly advancing in electric vehicle charging technology, consistently surpassing their Western counterparts. While European and American companies are still developing chargers in the 600-750 kW range, manufacturers like Geely Auto Group and BYD have already introduced charging systems that exceed 1,000 kW for passenger vehicles, sparking a competitive race for even greater speeds.
Achieving such high charging speeds without adversely affecting battery health is a significant challenge. Frequent ultra-fast charging can lead to premature aging and diminished battery performance. Geely Auto Group addressed this concern during the launch of its 2.2-megawatt charger in Ningbo, China, by detailing the innovative measures taken to mitigate battery degradation in its new power units. The company emphasized its commitment to preventing rapid aging, even extending the battery's warranty from 8 years/150,000 km to 8 years/200,000 km as a testament to its confidence in the technology's durability.
Geely's approach to combating battery degradation involves a multi-faceted strategy. Ren Xiangfei, the chief engineering scientist, explained that battery aging primarily stems from lithium plating and extreme temperatures. To counter this, Geely implemented several key innovations: The new Ultra Short Blade Battery features smaller cell sizes (395 mm and 370 mm) compared to standard industry models, reducing the travel distance for ions during charging and discharging. This design minimizes internal resistance and heat generation. Furthermore, structural modifications to both the cathode and anode, utilizing "high entropy elements" and a "flyover" design for the graphite anode, enhance ion mobility and prevent accumulation. A unique "lithium pulse restoration" technology applies micro-amplitude pulse currents to the anode, effectively preventing ion build-up and dendrite formation. For thermal management, an "end-to-end five-point liquid cooling system" works across the entire charging infrastructure, from the energy storage battery to the EV battery. This system is integrated with an AI-powered "Xingrui PowerMind" that anticipates battery temperatures 30 seconds in advance, adjusting charging speeds in real-time to maintain an optimal temperature of 55 degrees Celsius, with a maximum threshold of 65 degrees Celsius, aligning with new national standards in China.
Geely's advancements signify a critical step in making ultra-fast charging a sustainable reality for electric vehicles. By proactively addressing battery degradation, the company not only enhances the user experience but also promotes broader EV adoption. This innovation underscores a commitment to both technological progress and environmental responsibility, setting a new benchmark for the industry to follow.