e-Powertrain: Driving Tomorrow’s Mobility

From internal combustion engine (ICE) vehicles to the adoption of electric vehicles (EVs), the primary component in this transformation is the e-powertrain. An e-powertrain typically refers to the various components responsible for converting electrical energy stored in batteries into mechanical energy, thereby propelling the vehicle’s mobility. Normally, it is the “heart” owing to the number of components tied together to perform flawlessly for the effective functioning of an EV. Unlike gasoline-powered vehicles, electric vehicles use electric motors that function with electricity stored in batteries to turn the wheels. The design and efficiency of the e-powertrain play a crucial role in determining the performance, range, and efficiency of an EV.

To know about the components of an e-Powertrain- click here

Recent Developments in e-Powertrain

Electric vehicles (EVs) benefit from new e-Powertrain technology, which enhances their efficiency and power while reducing cost. Key innovations include:

DriveONE ePowertrain: The DriveONE ePowertrain from Huawei utilizes AI Flash Charging high-voltage technology to address key issues in EV four-wheel drive systems, featuring a 220 kW asynchronous front drive and a 270 kW synchronous rear drive, as announced at Auto Shanghai 2021. This 800 V high-voltage architecture enables ultra-high horsepower, flash charging (30% to 80% SOC in 15 minutes), and impressive acceleration, with the ARCFOX αS HI reaching 0–100 km/h in 3.5 seconds. Compared to traditional systems, Huawei’s solution boosts cruising range by 5%. Huawei DriveONE ePowertrain utilizes patented “Franklin” deflection technology, combined with conductive grease, to protect motor bearings against electrical corrosion. The patented anti-condensation connector from Huawei prevents moisture accumulation through rigorous testing, ensuring safety and reliability.

E-axle: BOSCH has developed the eAxle system, a compact and cost-effective electric drive solution for battery-electric and hybrid vehicles. By integrating the electric motor, power electronics, and transmission into a single unit, it directly powers the vehicle’s axle, enhancing efficiency and reducing complexity. With up to 96% efficiency and silicon carbide technology, the eAxle improves driving range and reduces battery size. The system offers scalable power from 50 to 300 kW, providing flexible performance with adjustable torque (1,000 to 5,500 Nm) and motor speeds up to 18,500 rpm. Its modular design simplifies installation, lowers component costs, and eliminates the need for separate components and cables. At just 85 kg for a 150 kW unit, the eAxle is a lightweight, high-performance solution suitable for a wide range of vehicle types.

OCTOPUS Project: The OCTOPUS project is Bentley Motor’s three-year research initiative to create a rare-earth magnetic-free electric vehicle axle as part of its plan to launch a fully electric car by 2026. The OCTOPUS project aims to develop a top-tier e-axle powertrain by 2026, utilizing advanced materials and processes.

Conclusion

The development of integrated e-powertrain systems plays a crucial role in driving the transition to electric mobility. Manufacturers now prioritize performance improvements and cost-effectiveness because electric motors and other essential components, such as power electronics and batteries, have become increasingly complex.

The expansion of the e-Powertrain ecosystem will continue to meet the increasing demand for electric vehicles as manufacturers advance through new technologies and adapt to consumer needs and regulatory requirements. Electric vehicle adoption is expected to accelerate worldwide, reshaping the automotive sector through the introduction of greener transportation solutions. The successful development of electric powertrains and the full realization of the electric vehicle market depend on coordinated efforts among component suppliers, vehicle manufacturers, and policymakers.