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 Concept AMG GT XX
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| Mercedes-Benz Concept AMG GT XX |
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<< Prev Page 2 of 3 Next >>  In the nearly 60-year history of the Mercedes-Benz performance and sports car brand, the powertrain has always been the heart of the vehicle, bar none. The team at Affalterbach are continuing this tradition with the CONCEPT AMG GT XX, which introduces a revolutionary drive technology in the form of the innovative axial flux motor.Its technological underpinnings were originally developed by British electric motor specialist YASA – a wholly owned subsidiary of Mercedes-Benz AG. For its application in the CONCEPT AMG GT XX and subsequently in series production, the concept was taken to a whole new level of performance. This was achieved in a collaboration between Mercedes-AMG and the technology experts from YASA. The performance specialists from Affalterbach have also developed the software for the operating strategy, which optimally utilizes the high performance of the motors. The innovative electric motors enable high output from an extremely compact package and enter series production at Mercedes-AMG in 2026. Thanks to a peak output of over 1,341 hp, the CONCEPT AMG GT XX can reach speeds of more than 223 mph. In combination with the new high performance battery, the three axial flux motors attain a completely new level, particularly in respect of continuous output. This allows the CONCEPT AMG GT XX to be pushed to its limits repeatedly, offering a new level of continuous performance that was almost unthinkable in the world of electric mobility – until now. The battery remains in an optimal temperature range even during intense driving, enabling both performance on the road and extremely fast charging. The concept vehicle can charge to approximately 400 kilometers (WLTP)2 of range in around five minutes, which is roughly equivalent to the distance from Affalterbach to Spa-Francorchamps. After fast charging, the vehicle can immediately deliver full output again - an unprecedented capability. Axial flux motors offer many benefits: they are significantly more compact, lighter and, above all, more powerful than conventional electric motors (radial flux motors). The power density of axial flux motors is around three times that of conventional electric motors. At the same time, the innovative motors are around two-thirds lighter and are just one third of the size. This compact motor design offers more flexibility when it comes to drivetrain packaging. Compared with conventional electric motors, the innovative drive delivers a considerably higher sustained power output as well as higher torque. This translates into the highest levels of performance, reproduceable again and again with great frequency. In an axial flux motor, the electromagnetic flux runs parallel to the motor’s axis of rotation. In a conventional electric motor, it runs perpendicular to the axis of rotation. The large components in an axial flux motor are shaped like slim discs. The stator is positioned between two rotors on the left and right sides. This layout of stator and rotors enables optimum power transmission to the rotors through the electric field generated by the stator. In the CONCEPT AMG GT XX, this combination is barely 3.5 inches wide. Each of the two motors at the rear are around just 3.1 inches wide. No fewer than three of these innovative electric motors guarantee outstanding system power in the CONCEPT AMG GT XX with a peak output of more than 1,341 hp. The motors are packaged into two High Performance Electric Drive Units (HP.EDUs) – one at the front and one at the rear. The HP.EDU at the rear has two axial flux motors, each equipped with a compact planetary gearset and one inverter, in a single casing. The motors and transmissions are oil cooled. To save even more space, the necessary pump control unit with hydraulic pumps and suction filters is integrated into the HP.EDU. The two inverters (one per motor) are water cooled. The material properties of silicon carbide offer multiple benefits for demanding applications requiring high voltages, high current, high temperatures and high heat conductivity. The front HP.EDU comprises one axial flux motor, a spur-gear transmission and an inverter. The front electric drive functions as a booster motor for when additional power or traction is required at the front wheels. When the front electric motor is not needed for the driving situation, a Disconnect Unit (DCU) decouples it. During acceleration and recuperation, the DCU engages for optimal performance. During steady driving, low load and coasting, it disengages again, reducing unnecessary drag losses and increasing efficiency. The axial flux motors are produced at the Mercedes‑Benz plant in the Marienfelde area of Berlin. It has been an important part of the global Mercedes‑Benz Powertrain production network for decades and handles the production of various drive components. Axial flux motor production involves approximately 100 processes, of which roughly 65 are new for Mercedes‑Benz and 35 are world firsts. These include new forms of laser technology combined with innovative joining processes and artificial intelligence. These new production processes were developed largely in-house by Mercedes‑Benz, and the innovations led to more than 30 patent applications. All this underscores Berlin-Marienfelde's leading role worldwide in production-process innovations. The high voltage battery in the CONCEPT AMG GT XX is a completely new development. It benefits from all the experience from the AMG ONE and Formula 1® as well as the knowledge of the best engineers from Mercedes‑AMG in Affalterbach and Mercedes‑AMG High Performance Powertrains (HPP) in Brixworth (UK). The High Performance Electric Battery (HP.EB) delivers a high power output with exceptional repeatability, guaranteeing the vehicle’s outstanding overall performance. This is paired with rapid energy absorption and high power density. Contributing to the high system performance are three main aspects: new battery cell developments, direct cooling of the cells and high voltage. The battery features a completely new cell design, developed for exceptionally high performance. The CONCEPT AMG GT XX uses cylindrical cells that are remarkably tall and slim. This format delivers many benefits for cell cooling. The narrow diameter means the distance from the cell core to the casing is particularly small. This enables rapid dissipation of heat generated under load and ensures each individual cell is kept within the optimum temperature window. Also new is the laser-welded aluminum cell housing. It is lighter than the steel housings typically used and has considerably better electrical and heat conductivity. This offers benefits in the targeted thermal control of the cells – with faster cooling or heating on demand. The cells use the full-tab configuration which means the entire surface of the cell tail is electrically and thermally connected to the pole. This enables a significant reduction in the cell’s internal resistance, which facilitates high charging and discharging power. Furthermore, full-tab battery cells are especially robust and also function reliably under demanding load conditions. A further innovation is the optimized operating window. The full-tab cells underwent detailed measurement and testing in advance using a special reference electrode and core temperature sensors. The data gathered was implemented in the software for the battery management system. This enables better modelling of cell behavior and thus a significant increase of charging power at higher temperatures. The cell chemistry was developed specifically for the CONCEPT AMG GT XX. It is based on NCMA (nickel/ /cobalt/manganese/aluminum) in the cathode and an anode with silicon content. This offers a combination of high energy density of 300 Wh/kg (740 Wh/l on cell level), powerful charging performance and long lifespan that is thus far unique. Overall, the combination of a tall, narrow cell format, aluminum housing, full-tab technology and NCMA chemistry lays the foundation for high performance within the individual battery cells, especially in terms of sustained power delivery. The individual cells are packaged into laser-welded plastic modules. Direct cell cooling is integrated into the plastic modules to ensure optimum heat dissipation. A high tech coolant based on an electrically non-conductive oil flows around each individual cell to maintain the optimum temperature. The coolant flows through coolant channels in the modules, which are optimized for equal cooling of all the cells. A special piping system ensures even distribution of the cooling oil. There are more than 3,000 cells in the CONCEPT AMG GT XX. The lithium-ion battery has a high voltage of more than 800 volts, which also contributes to overall performance. The benefits of the high voltage are lower weight due to the lighter cables, higher continuous power output and shorter battery charging times. Charge losses via the charging cable are also considerably less. Temperature control of the HP.EB is intelligently configured for different driving situations. Heating it to the optimum temperature window is fast and precise. Maximum power is delivered across a wide temperature band. The operating strategy is programed to facilitate maximum performance from the battery, followed by a reduction in temperature through the direct cooling system. Intelligent heat management controls the temperature of the coolant for each cell module at precisely the pre-determined value as required (on-demand cooling). As a result, the battery retains its high power reserves, even during dynamic driving with frequent acceleration (battery discharged) and deceleration (battery charged via recuperation). This effective direct cooling in combination with the cell enables the high level of sustained power density. The charging performance likewise sets new benchmarks – again due to direct cooling. This pairs with optimized thermal management of the cells and power lines during charging. The CONCEPT AMG GT XX achieves a very high average charging power of more than 850 kW at 1,000 amps over a wide range of the charging curve. To match the vehicle’s charging performance, the Mercedes‑Benz Charging Unit worked in close collaboration with partner Alpitronic, the European market leader in high power charging. Alpitronic has developed a prototype charging station. It is the first charging station able to transmit such a high current via a standard CCS cable. For the future series-production models, Mercedes-Benz will expand the infrastructure of its own Mercedes‑Benz Charging Network with the next generation of high performance charging stations. Customers will benefit from extremely fast charging times. The body structure of the CONCEPT AMG GT XX is based on the new AMG.EA architecture and is completely new. The intelligent material matrix consisting of aluminum, steel and fiber composite materials combines the exceptional rigidity that is a hallmark of AMG with low weight. Optimized material cross-sections and component design create space for the advanced technology and sophisticated powertrain. The high voltage battery is centrally integrated into the structure of the electric skateboard platform. Its protective housing encases the cell modules, all switch components and the Battery Management System (BMS), which is likewise an exclusive in-house development by AMG. Defined lateral load paths combine high torsional rigidity with low weight and form the basis for a high level of crash safety. The battery housing is part of the vehicle structure and integrated into the crash concept. Battery, high voltage (HV) cables and further HV components are configured and secured to fulfill Mercedes‑Benz’s high safety requirements. With its dynamic fastback, low slung hood and sharply raked windshield, the CONCEPT AMG GT XX is a statement of the brand’s signature sports car performance. This is further underscored by the striking color scheme in sunset beam orange. The AMG specific front grille with ten vertical struts embodies a characteristic AMG design feature. However, it is further developed with its more oval and concave form. The Mercedes star is integrated into the middle. The slender, rectangular auxiliary headlights are recessed into the outer edges of the grille. The vertically arranged main headlights set innovative accents with low beam and high beam stacked one on top of the other. A characteristic feature from motorsport is the two-part air outlets in the hood, each with two fins. These dissipate warm air from the horizontal cooling modules in the front of the vehicle and thus optimize the cooling air path. The front splitter extends far around the front of the car with an integrated air curtain function reaching up to the front wheel arches. The hood encapsulates the front as far as the wheel arches and emphasizes the distinctive sports car DNA of the CONCEPT AMG GT XX with two power domes. The vehicle’s profile is defined by the low-slung front end, from which the fenders flare organically to frame the front wheels. The long, low greenhouse with double-bubble roof and three windows on each side rests on the muscular rear shoulders. The exterior mirrors are elevated on the front doors, in typical sports car fashion. The sill claddings have aerodynamic contours that extend into the rear wheel arches. Aerodynamic fine-tuning is also evident in the recessed door handles. From a bird's eye perspective, the streamlined greenhouse tapers rearward, allowing for particularly wide shoulders. The rear wheel arches also flow organically from the flanks. Another design element at the rear is the wide diffuser in exposed carbon, which sweeps deeply down at either side. Designed to ensure rear stability at high speeds, its form is reminiscent of the AMG ONE. << Prev Page 2 of 3 Next >> |
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