Hyundai Details the E-GMP Dedicated EV Platform
Hyundai Motor Group has unveiled its new Electric-Global Modular Platform (E-GMP), a dedicated Battery Electric Vehicle (BEV) platform that the company says will serve as the core technology for its next-generation BEV line-up.
From 2021, the E-GMP will underpin a range of dedicated new BEVs, including Hyundai’s IONIQ 5, Kia Motors Corporation’s first dedicated BEV to be revealed in 2021, and other models.
E-GMP will, Hyundai says, provide various advantages compared to the Group’s existing platforms, including increased development flexibility, driving performance, increased driving range, strengthened safety features, and more interior space.
The platform is designed to reduce complexity through modularisation and standardisation, allowing for swift development of products which can be used across most vehicle segments and enable the company to enlarge its EV line-up over a relatively short period.
The platform has a five-link rear suspension system, and an integrated drive axle (IDA), which combines wheel bearings with the drive shaft to transmit power to the wheels. There’s a low centre of gravity thanks to a low-mounted battery pack and the platform secures battery safety via a support structure made of ultra-high strength steel. Hot-stamped steel components surround this structure for additional rigidity. There are 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.
Hyundai says that by strengthening the structure of the load support section, located in front of the dashboard, engineers have been able to minimise collision energy to the power electric system and battery. The A-pillar’s load distribution structure is also designed to prevent deformation of the passenger cell.
The battery pack – mounted between the front and rear wheel axles – will be Hyundai’s most power-dense system. This, the company says, is partly thanks to its enhanced cooling performance, a result of a new separate cooling block structure which helps make the battery pack more compact. With energy density enhanced by around 10 per cent compared to existing EV battery technology, the battery packs are lighter, can be mounted lower in the body, and liberate more cabin space.
The E-GMP’s power electric (PE) system consists of a motor, EV transmission and inverter. These three components are integrated into a single module. The high-speed motor is smaller than other motors while providing comparable performance, enabling efficiencies in both space and weight. With a standardised battery system, Hyundai says it can tune the system to offer performance appropriate for a specific vehicle segment, to maximise 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 per cent longer on the same battery energy.
Customers will be able to choose between rear-wheel and all-wheel drive configurations and models with the latter 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.
Hyundai says the E-GMP offers 800V charging capability as standard and enables 400V charging without the need for additional components or adapters. It further claims a BEV based on E-GMP is capable of a range over 500km with a fully charged battery, can high-speed charge up to 80 per cent in 18 minutes and can add up to 100km of driving range in five minutes.
And the E-GMP’s charging system is flexible too. Hyundai says that its Integrated Charging Control Unit (ICCU) enables a new vehicle-to-load (V2L) function, allowing a 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 E-GMP will underpin the Group’s plans to introduce a total of 23 BEV models, including 11 dedicated BEV models, and sell more than 1 million BEVs worldwide by 2025.
30 December 2020