Revolutionary new electric drive in the Mercedes-AMG GT 4-Door Coupé
Three axial flux motors
At the heart of the drive concept are three so-called axial flow motors. Two of them operate on the rear axle, and one on the front axle. The basic principle was developed by the British electric motor specialist YASA , which has been wholly owned by Mercedes -Benz AG since 2021 .
Unlike conventional radial flux motors, the electromagnetic flux here runs parallel to the axis of rotation. This results in a particularly compact design with extremely high power density. The motors are constructed as narrow discs in which two rotors sandwich the stator – a so-called H-arrangement.
The advantages of this construction method are considerable:
- significantly higher continuous power output
- higher torque
- more compact design
- improved thermal stability
- Reproducible peak performance even under continuous load
Particularly impressive: The front engine measures just under nine centimeters in width, while the two rear engines are only about eight centimeters wide.
Over 13,000 revolutions per minute
The two rear motors are housed in a shared High Performance Electric Drive Unit (HP.EDU). There, they work together with a compact planetary gearbox, oil-cooled components, and water-cooled silicon carbide inverters.
The rear axle motors spin at more than 13,000 rpm at top speed, while the front motor even exceeds 15,000 rpm. This is made possible by highly developed SiC inverters, which, thanks to the properties of silicon carbide, can handle high voltages, temperatures, and currents with exceptional efficiency.
he front motor acts as an intelligent booster, activating only when additional traction or maximum power is required. A Disconnect Unit (DCU) instantly disconnects the front-wheel drive from the system under light load to minimize drag losses and increase efficiency.
Up to 1,169 hp system output
The combination of three axial flow motors ensures extreme performance values:
- GT 55 4-door coupé 4MATIC+: 600 kW (816 hp)
- GT 63 4-door coupé 4MATIC+: 860 kW (1,169 hp)
According to AMG, the platform is even designed for outputs exceeding 1,000 kW. Particularly noteworthy is its ability to repeatedly deliver this power – a range where many electric vehicles reach their thermal limits.
New AMG High Performance Electric Battery
Equally revolutionary as the drive system is the new AMG High Performance Electric Battery (AMG HP.EB). The battery was completely redesigned and combines expertise from the Mercedes-AMG ONE hypercar , Formula 1, the development department in Affalterbach, and Mercedes-AMG High Performance Powertrains in Brixworth, UK.
The goal was clear: maximum continuous power output, extremely fast charging capability and high thermal stability.
Direct-cooled cylindrical cells with NCMA chemistry
The system uses 2,660 newly developed cylindrical cells, grouped into 18 modules. These cells have an unusual shape: 105 millimeters high and only 26 millimeters in diameter. This design significantly improves heat dissipation because the distance between the cell core and the surface is particularly small.
The cells also possess:
- laser-welded aluminum housings
- Full-tab technology for lower internal resistance
- special NCMA cell chemistry with silicon anode
- Energy density of over 298 Wh/kg
The direct cooling of each individual cell is particularly innovative. An electrically non-conductive oil flows directly around each cylindrical cell, keeping it permanently within its optimal temperature range. This ensures the battery remains efficient even under extreme loads.
Cooling performance at Formula 1 level
Thermal management is one of the most technically sophisticated systems in the vehicle. At the heart of the AMG GT 4-Door Coupé is the so-called Central Coolant Hub (CCH), a highly integrated cooling system consisting of pumps, sensors, and valves.
The battery achieves a cooling capacity of at least 20 kW – a massive improvement over conventional battery systems, which usually only reach between five and eight kilowatts.
In addition, there is an intelligent "on-demand cooling" system. This directs the coolant precisely to where it is currently needed. This ensures consistent performance during acceleration, recuperation, and fast charging.
800-volt technology and ultra-fast charging
The high-voltage battery operates at 800 volts. This enables higher continuous power outputs, lower charging losses, and significantly shorter charging times.
At suitable fast-charging stations, the new AMG GT 4-Door Coupé achieves charging capacities of over 600 kW at more than 800 amps. This allows for a range of approximately 460 kilometers to be added within ten minutes. Charging from 10 to 80 percent takes just eleven minutes. The vehicle also supports various fast-charging standards worldwide, including CCS2, CCS1, GB/T, CHAdeMO, and NACS.
Battery as a load-bearing safety element
The integration of the battery also demonstrates the vehicle's technological sophistication. The battery housing is fully integrated into the vehicle structure and actively plays a role in crash management. The design combines aluminum, steel, and fiber-reinforced composites to achieve maximum rigidity at a low weight.
The high-voltage components not only meet legal requirements, but also the particularly stringent internal safety standards of Mercedes-Benz.
Uncompromising electric performance
With the new Mercedes-AMG GT 4-Door Coupé, AMG shows what electric high-performance vehicles could look like in the future: maximum power, reproducible performance, ultra-fast charging and intelligent thermal management in a practical overall package.
The combination of axial flow motors, direct cooling and 800-volt architecture elevates the sports car to a new technological level – and could become the benchmark for future generations of electric performance vehicles.
Der neue Mercedes-AMG GT 4-Türer Coupé setzt mit Axial-Fluss-Motoren, 1.169 PS, innovativer Direktkühlung und 800-Volt-Batterietechnik neue Maßstäbe bei elektrischer Performance und Ladegeschwindigkeit.
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