Fast-charging battery from GAC thanks to graphene
80 percent charge for e-car in 8 minutes
Chinese manufacturer GAC has reportedly achieved a breakthrough in the industrialization of batteries with graphene at the anode: In September 2021, the electric car Aion V with the super battery is to go into series production and enable charging at “tank speed” with 600 amps.
Back in the summer of 2020, GAC promised a breakthrough in fast charging capability. GAC Group ( Guangzhou Automobile Group) has been researching large-scale graphene production since 2014 and holds numerous patents, the Chinese automaker said at the time. GAC launched its first model in 2010 under the Trumpchi sub-brand. In 2019, the Chinese launched the GAC Aion label for electric vehicles. The first model was the Aion S sedan, followed by the LX SUV, and in June 2020, the Aion V, another SUV around 4.60 meters long, was launched.
GAC sells electric cars under the Aion name, here the larger LX (4.79 meters long).
Faster charging instead of just more range
For the GAC now promises the new battery, which, according to the manufacturer, has already passed the most stringent safety test – the “Battery Shooting Test”. This graphene-based battery, it says, has a 6C fast-charge capability and can be charged to 80% capacity within 8 minutes when combined with a 600A high-power charger. 1C means that a battery is completely charged or discharged within 1 hour – charging or discharging current are related to the maximum capacity of the battery. 6C therefore means that the GAC battery could be fully charged six times in one hour – or to 100 percent in one sixth of an hour, i.e. 10 minutes. An empty 100-kWh battery would therefore be full again after 10 minutes or 80 percent after 8 minutes. However, this is only possible if the appropriate high-performance charger is available – and the correspondingly powerful connection: Professor Maximilian Fichtner, Professor of Solid State Chemistry at the University of Ulm, points out: “If you want to charge 60 kWh in 8 minutes, you need 0.5 megawatts of power” – enough to run 150 ovens simultaneously.
Currently, the Aion V has lithium-ion batteries from CATL; the version with the largest battery (Aion V 80) is said to be capable of 600 kilometers of range. An Aion V with a 100-kWh Graphene battery could then have a range of 750 kilometers – according to a cycle that is not very realistic, because that would correspond to a consumption of just over 13 kWh per 100 kilometers, which would be very little. But the pure range seems secondary in view of the fast-charging capability of the graphene battery.