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Hyundai Reveals First Dedicated BEV Platform, E-GMP

The new V2L function can supply up to 3.5kW of power and operate a mid-sized air conditioner unit and a 55-inch television for up to 24 hours. Photo: Hyundai

Hyundai has unveiled its new Electric-Global Modular Platform (E-GMP), a dedicated battery electric vehicle (BEV) platform.

Revealed online during an ‘E-GMP Digital Discovery’ event, the platform will serve as the core technology for Hyundai’s next-generation BEV line-up.

The event was broadcasted through the Group’s official YouTube channel and Channel Hyundai, an online global content platform.

From 2021, the E-GMP will underpin a range of dedicated new BEVs, including Hyundai’s IONIQ 5; Kia’s first dedicated BEV to be revealed in 2021; and a series of other models.

Designed exclusively for BEVs, E-GMP provides various advantages compared to the Group’s existing platforms, which have each been engineered predominantly to accommodate internal combustion engines. Benefits include increased development flexibility, powerful driving performance, increased driving range, strengthened safety features, and more interior space for occupants and luggage.

Maximizing development flexibility through modularization and standardization

E-GMP reduces complexity through modularization and standardization, allowing rapid and flexible development of products that can be used across most vehicle segments, such as sedans, SUVs and CUVs. Moreover, flexible development can satisfy various customer needs for vehicle performance. Among these, a high-performance model will accelerate from zero to 100kph in less than 3.5 seconds and achieve a maximum speed of 260km/h.

Designed for driving performance, safety and maximized space

E-GMP is engineered to offer improved cornering performance and driving stability at high speed. This is due to optimal weight distribution between front and rear, a design that enables a low centre of gravity thanks to its low-mounted battery pack, and the adoption of electric motors located in the space previously occupied by an engine.

The high-speed electric motor raises the driving performance of E-GMP vehicles. A five-link rear suspension system, which is typically used for mid and large-sized vehicle segments, and an integrated drive axle (IDA), which combines wheel bearings with the driveshaft to transmit power to the wheels, enhance ride comfort and handling stability.

The platform secures battery safety through a battery support structure made of ultra-high-strength steel. Hot-stamped steel components surround this structure for additional rigidity. Collision energy can be absorbed efficiently thanks to energy-absorbent sections of the body and chassis, effective energy load paths, and a central section of the battery pack tightly bound to the vehicle body.

Moreover, by strengthening the structure of the load support section, located in front of the dashboard, engineers have been able to minimize collision energy to the power electric system and battery. The A-pillar’s load distribution structure also prevents deformation of the passenger cell.

E-GMP maximizes interior space through its long wheelbase, short front and rear overhangs and slim cockpit module. With the battery pack mounted beneath the floor, the E-GMP creates a flat floor for the cabin. This provides more legroom for passengers while enabling various arrangements for the front and rear seats.

Efficient and powerful electrification system

The E-GMP’s compact new power electric (PE) system consists of a powerful motor, EV transmission and inverter. These three components are integrated into a single compact module. This ensures powerful performance by raising the motor’s maximum speed by up to 70 percent compared to existing motors. The high-speed motor is smaller than other motors while providing comparable performance, and it gives efficiencies in both space and weight.

Additionally, a standardized battery system can be tuned to offer performance appropriate for a specific vehicle segment, to maximize driving range, or to meet various customer needs.

The motor is controlled by the inverter power module, which adopts silicon carbide (SiC) semiconductors. This motor can enhance system efficiency by around 2~3 percent, which means the vehicle can be driven for approximately 5 percent longer on the same battery energy.

E-GMP relies on the rear wheel for propulsion. Customers will be able to choose between rear-wheel and all-wheel-drive configurations; models with the latter can be equipped with an additional motor. The all-wheel-drive system includes an EV transmission disconnector, which can control the connection between the additional motor and front wheels, and switch between two-wheel and all-wheel drive modes to enhance efficiency by offering the ideal level of power or performance for current driving conditions.

All vehicles developed with the E-GMP platform use a standardized single type of battery module. This module is composed of pouch-type standard cells and can be packed in different quantities as required for each vehicle.

Multi (800V and 400V) and bi-directional charging system

Most existing EVs and the fast-charging infrastructure provide 50kWh~150kWh charging for EVs equipped with a 400V system; however, the development of 800V infrastructure, with up to 350kWh charging, will gradually enable more fast-charging.

In line with this trend, Hyundai has invested in IONITY, as a strategic partner and shareholder. IONITY operates 298 high-power charging (HPC) stations – using a charging capacity of up to 350 kWh – along highways in European countries. The company plans to increase this number to 400 HPC stations by 2022, including 53 currently under construction.

E-GMP offers 800V charging capability as standard and enables 400V charging, without the need for additional components or adapters. The multi-charging system is a patented technology that operates the motor and the inverter to boost 400V to 800V for stable charging compatibility.

A BEV based on E-GMP is capable of a maximum range of over 500km with a fully charged battery, according to the Worldwide Harmonized Light-duty vehicle Procedure (WLTP). Moreover, it can high-speed charge up to 80 percent in just 18 minutes and can add up to 100km of driving range in just five minutes.

Unlike previous BEVs, which only accept one-way charging, the E-GMP’s charging system is more flexible. The E-GMP’s newly developed Integrated Charging Control Unit (ICCU) represents an upgrade from existing On-Board Chargers (OBC), which typically only allow electricity to flow in a single direction from an external power source. The ICCU enables a new vehicle-to-load (V2L) function, which can additionally discharge energy from the vehicle battery without additional components. This enables BEV based on the E-GMP to operate other electric machinery (110 / 220V) anywhere. The system can even be used to charge another EV.

The new V2L function can supply up to 3.5kW of power and operate a mid-sized air conditioner unit and a 55-inch television for up to 24 hours.

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