Integrated Electric Drive is a core technology in the new energy vehicle (NEV) sector. Through structural optimisation and integrated engineering, it consolidates multiple standalone components—such as the drive motor, motor controller, and reduction gearbox—into a compact powertrain module. Simply put, it transforms what used to be individual powertrain parts into a single, highly integrated assembly, significantly boosting packaging efficiency and energy conversion efficiency.
The foundation of an electric drive system comprises the "Major Three Electrics": the drive motor, motor controller, and reduction gearbox. On this basis, it can further integrate "Minor Three Electrics" components, including the On-Board Charger (OBC), DC-DC converter, and Power Distribution Unit (PDU) .
Integrated electric drive technology did not happen overnight; rather, it has evolved through a clear developmental path across several distinct stages:
| Development Stage | Integration Scope | Key Characteristics |
|---|---|---|
| 1.0 Distributed | All components completely standalone | Low R&D barrier, but takes up substantial space, adds excess weight, and suffers higher energy loss. |
| 2.0 2-in-1 | Motor + Reduction gearbox | Initial integration, delivering modest weight and packaging savings. |
| 3.0 3-in-1 | Motor + Reduction gearbox + Controller | Current industry mainstream, reducing weight by 20–30%, shrinking volume by 25–35%, and boosting efficiency by 2–3%. |
| 4.0 Multi-in-1 | 3-in-1 + OBC + DC-DC + PDU, etc. | Higher integration level that represents the latest industry trend, with manufacturers rolling out 6-in-1, 8-in-1, and even 11-in-1 setups. |
Lighter and more space-efficient: By sharing structural housings and cooling circuits, overall component volume and weight are significantly reduced, freeing up more cabin room or battery packaging space.
Higher efficiency and lower power consumption: Shortening the high-voltage wiring harness connections between modules effectively cuts energy losses during transmission.
Lower manufacturing costs: Reducing the total parts count and streamlining assembly on the OEM production line helps bring down overall manufacturing costs.
At present, 3-in-1 electric drive systems are standard equipment across most mass-market NEVs. Meanwhile, the industry's technological race is advancing towards multi-in-1 integration and high-voltage architectures.
The Multi-in-1 Race
BYD: Has launched an 8-in-1 electric powertrain, mass-produced and deployed across models built on its e-Platform 3.0.
Geely: Has showcased an even more aggressive 11-in-1 intelligent electric drive system, already fitted to its Galaxy series models in pursuit of ultimate packaging efficiency.
BorgWarner: Has secured hybrid vehicle supply contracts from leading Chinese carmakers with its 7-in-1 integrated electric drive module.
High-Voltage Architecture and Intelligence
"High voltage" refers to the transition from conventional 400V setups to 800V or higher voltage platforms, delivering faster charging speeds and higher overall system efficiency. "Intelligence" indicates that the electric drive system possesses a dedicated digital "brain", capable of optimising power delivery in real-time based on road conditions and driver behaviour, alongside supporting OTA software updates to ensure vehicle performance stays continually updated.
Overall, integrated electric drive technology is becoming a vital benchmark for assessing an EV's core engineering capability. The industry trajectory is firmly centred on achieving superior efficiency, performance, and cost optimisation through ever-higher levels of integration.
© 2024 Bitauto.com. All Rights Reserved.
Bitauto (www.yiche.com and www.bitauto.com) is one of the most visited automotive websites in China. We provide detailed info on Chinese car brands available in your area. Please note that the information provided on this website is based on publicly available data and is for reference only. It may not be fully updated or accurate at all times.
Help us improve our website
