Hyundai E-GMP (''Electric Global Modular Platform'') is a dedicated

battery electric vehicle A battery electric vehicle (BEV), pure electric vehicle, only-electric vehicle, fully electric vehicle or all-electric vehicle is a type of electric vehicle (EV) that exclusively uses chemical energy stored in rechargeable battery packs, ...

platform for

Hyundai Motor Group The Hyundai Motor Group (HMG; ; ; stylized as HYUΠDAI) is a South Korean '' chaebol'' (loosely similar to a multinational conglomerate but without a central holding company or ownership structure) headquartered in Seoul, South Korea. The HM ...

automobiles. It is the first electric-only dedicated platform by Hyundai. It has been used for Hyundai,

Kia Kia Corporation, commonly known as Kia (, ; formerly known as Kyungsung Precision Industry and Kia Motors Corporation), is a South Korean multinational automobile manufacturer headquartered in Seoul, South Korea. It is South Korea's second lar ...

, and

Genesis Genesis may refer to: Bible * Book of Genesis, the first book of the biblical scriptures of both Judaism and Christianity, describing the creation of the Earth and of mankind * Genesis creation narrative, the first several chapters of the Book of ...

automobiles starting in 2021. It follows Hyundai's earlier Power Electric System (PE System), which describes the drivetrain of an electric vehicle, including the traction motor, storage battery, and power electronics.

History

The PE System serves the same function for an electric vehicle as an

engine An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy. Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power ...

and a transmission for a vehicle powered by a conventional

internal combustion engine An internal combustion engine (ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal c ...

. The first generation PE system used a discrete traction motor and

power inverter A power inverter, inverter or invertor is a power electronic device or circuitry that changes direct current (DC) to alternating current (AC). The resulting AC frequency obtained depends on the particular device employed. Inverters do the opp ...

electronic module, connected with an orange three-phase cable. In the second-generation PE system, the motor and inverter have been integrated, and cables and connectors have disappeared. In 2017, Hyundai confirmed reports that it was developing a dedicated platform for electric vehicles; at the time, only a few manufacturers had done so. The third-generation PE System consists of a compact, integrated powertrain module, including traction motor,

reduction gear A gear train is a mechanical system formed by mounting gears on a frame so the teeth of the gears engage. Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping, providing a smooth transmission ...

transmission, and power inverter. The third-generation PE system is used in the E-GMP platform. Four-wheel drive is provided by placing motors on the front and rear wheels. The integration of the motor-inverter housing lowered the inverter height by about . The PE System has also been installed into the Hyundai Vision FK concept, an eco-friendly hydrogen electric vehicle. In this vehicle, the PE System has been combined with a hydrogen fuel cell system. A standardized battery system can be tuned and implemented as part of the system appropriate for a specific vehicle segment. This system is said to maximize driving range or meet the needs of a customer.

Technical design

The E-GMP platform is an 800 V architecture with scalable wheelbase length, and supports batteries from multiple manufacturers. The motor, inverter, and transmission are integrated into a single powertrain unit.

Traction motor

Both single motor 2WD (rear axle) and dual motor AWD are supported. Hyundai claim the motor is approximately 10% more efficient than a conventional motor due to "hairpin winding technology", allowing the coils to be wound more densely, and more effective cooling.

Reduction gear ransmission

The transmission reduces the traction motor speed and applies torque to the driven axle. This effectively multiplies torque at the wheel for electric vehicles. In addition, an EV Transmission Disconnector is provided, which allows for the motor and drive axle to be disconnected, which enables free shifting between 2WD (2 wheel drive) and 4WD (4 wheel drive). This is only available for the all-wheel drive system.

Battery and charging

The

Li-ion batteries A lithium-ion or Li-ion battery is a type of rechargeable battery which uses the reversible reduction of lithium ions to store energy. It is the predominant battery type used in portable consumer electronics and electric vehicles. It also see ...

are pouch-sized and the battery-pack is designed to be tall. E-GMP vehicles are expected to have a range of at least under the WLTP test cycle. Vehicles will support 200 kW fast charging; Hyundai claim an 18-minute charge will restore 80% of capacity (80% SOC of 77.4kWh in 18 minutes) and a 5-minute charge will add of range when using a high-power (800 V/350 kW) DC fast charging supply. By standardizing the battery type and size, repairs can be carried out more economically by replacing a single module, rather than the entire battery pack. Hyundai claim that power density has increased by 10% with the E-GMP. Current (as of 2022) DC fast charging infrastructure has a power and voltage of 50–350 kW and 400-920 V. The E-GMP electronics support voltages of both 400 V and 800 V charging systems and offers bi-directional charging (V2L (110/230 V and up to 3,7 kW),

V2V Vehicular ad hoc networks (VANETs) are created by applying the principles of mobile ad hoc networks (MANETs) – the spontaneous creation of a wireless network of mobile devices – to the domain of vehicles. VANETs were first mentioned and introd ...

and V2G). The platform uses the vehicle's motor/inverter to convert incoming DC current at 400 V to 800 V.

Inverter

The inverter converts

direct current Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or eve ...

electrical energy stored in the battery to the

alternating current Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current (DC) which flows only in one direction. Alternating current is the form in whic ...

power used in the traction motor. The inverter

power module A power module or power electronic module provides the physical containment for several power components, usually power semiconductor devices. These power semiconductors (so-called dies) are typically soldered or sintered on a power electronic ...

comes with silicon carbide ()

semiconductor A semiconductor is a material which has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. Its resistivity falls as its temperature rises; metals behave in the opposite way. ...

s. These are proven to be more efficient than existing semiconductors that are only made with Silicon, as one but not limited to the increase of thermal management, where the

thermal conductivity The thermal conductivity of a material is a measure of its ability to conduct heat. It is commonly denoted by k, \lambda, or \kappa. Heat transfer occurs at a lower rate in materials of low thermal conductivity than in materials of high thermal ...

of silicon carbide is 1490W/m-K (Watts per meter-Kelvin), compared to the 150W/m-K offered by Silicon. SiC is used for the rear (main) motor to minimize conversion losses and to facilitate its use in high-voltage and high-current circuits. The front motor, on vehicles so equipped, will use silicon-based power electronics to reduce costs. In 2022, Hyundai announced that it will switch to SiC for the front motor inverter also, improving efficiency and range by approximately 5%.

Chassis

The platform supports a wheelbase exceeding . E-GMP supports various sizes and configurations of vehicles, including

C-segment The C-segment is the 3rd category of the European segments for passenger cars and is described as "medium cars". It is equivalent to the Euro NCAP "small family car" size class, and the compact car category in the United States. In 2011, the C- ...

E-segment The E-segment is the 5th category of the European segments for passenger cars, synonymous with the term executive car. E-Segment is a niche in Europe (2-3% penetration in 2010s). As of 2017, 2018, 2019 and 2020, E-segment sales account for 2.7 ...

, CUV, sedan, and

SUV A sport utility vehicle (SUV) is a car classification that combines elements of road-going passenger cars with features from off-road vehicles, such as raised ground clearance and four-wheel drive. There is no commonly agreed-upon definiti ...

, including three-row SUVs with seven seats. Albert Biermann stated that "existing erivativeEVs on ICEV platforms will see some expansions into smaller segments", which was clarified to mean that smaller EVs would continue to use a front-wheel-drive platform. The rear suspension uses a five-link arrangement. An integrated drive axle is used, in which the drive shaft and wheel bearings are a single unit; this reduces the number of parts and increases rigidity. The battery is attached to the full-perimeter frame using eight bolts running completely through the battery for strength. The front and rear crumple zones are designed to absorb and dissipate the energy of a potential impact, and high strength steel is used to protect the battery and passenger compartment.

Applications

Hyundai plan to release 23 battery electric vehicles, including 11 exclusively electric vehicles, using the E-GMP platform. ;Models released: * Hyundai Ioniq 5 (NE) (2021–present) * Hyundai Ioniq 6 (CE) (2022–present) * Kia EV6 (CV) (2021–present) * Genesis GV60 (JW) (2021–present) ;Upcoming models: * Kia EV4 (TBA) * Kia EV9 (anticipated to launch in 2023) * Hyundai Ioniq 7 (anticipated to launch in 2024) * Genesis GV90 (anticipated to launch in 2024) File:Hyundai Ioniq 5 IAA 2021 1X7A0189.jpg, Hyundai Ioniq 5 File:Hyundai IONIQ 6 CE Serenity White Pearl (1).jpg, Hyundai Ioniq 6 File:Kia EV6 001.jpg, Kia EV6 File:Genesis GV60 Classic-Gala 2022 1X7A0364.jpg, Genesis GV60

References

{{Hyundai Motor Group Electric vehicle platforms E-GMP