VCU research: rapid evolution to integration and domain control
OEMs gradually realize independent supply amid the competitive landscape of VCUs for new energy passenger cars
The VCU is the "brain" of new energy vehicles. In the early development stage of China's new energy vehicle industry, VCUs were mainly supplied by foreign vendors. Afterwards, domestic automakers and automotive electronics suppliers have gradually mastered core technologies, so that their industrialization capabilities were greatly improved.
For example, BYD has fully realized independent supply of VCUs, Geely has continuously increased the proportion of self-produced VCUs to about 60%, almost 80% of Changan Automobile’s VCUs are produced by itself, and Chery can produce more than 90% of its own VCUs.

The VCUs of some OEMs or some models are purchased from third-party suppliers like UAES, Bosch, Continental, Denso, G-Pulse Electronics Technology, Atech, Hefei Softec Auto Electronic, Hangsheng Electronics, etc. Suppliers can provide their own software and hardware directly to OEMs, or they can be the foundries of OEMs.
The VCU market size is related to the output of new energy vehicles. By 2025, China new energy vehicle VCU market size will hit RMB5.03 billion (including self-supply of automakers).

Lightweight promotes the development of "electric drive + electric control + VCU" integrated system
In order to cater to the development trend of electrified, intelligent and lightweight vehicles, VCUs will tend to be highly integrated in the future. OEMs and Tier 1 suppliers have launched "all-in-one" electric drive systems, containing VCUs.
To further reduce the weight of new energy vehicles, improve product performance and ride comfort, BAIC started to try highly integrated products, followed by GM, Huawei, BYD, etc.. "Electric drive + electronic control + VCU" integrated systems have become the focus of OEMs and Tier 1 suppliers.

In September 2021, FinDreams Powertrain under BYD launched the "eight-in-one" electric powertrain, which deeply integrates drive motor, motor controller, reducer, automotive charger, DC converter, power distribution box, VCU, and battery manager.
One of the main purposes of BYD's "eight-in-one" integrated system is to reduce the weight of electric vehicles. It can realize the sharing of external high-voltage filters, external interface filter circuits and high-voltage sampling, as well as the in-depth integration of system DC, OBC, power distribution, transformers, inductors and VCU/BMC/MCU chips, so that an H-Bridge, transformers and a lot of high-voltage wiring harness are unnecessary, the magnetic module size is reduced by 40%, the overall volume is cut down by 16% (which can expand the riding space or increase the battery capacity), and the weight is slashed by 10% (which can further reduce power consumption).

In July 2021, Changan Automobile released the second-generation electric drive integrated system, which combines seven components: VCU, high-voltage junction box, motor controller, DC converter, charger, motor, and reducer. Compared with the first-generation "three-in-one" (integrated motor, electronic control, and reducer) system, the second generation has been significantly improved in comprehensive performance, with the size reduced by 5%, the weight reduced by 10%, the power density increased by 37%, and the efficiency improved by 5%.
Changan Automobile expects to mass-produce next-generation super integrated electric drive in the second quarter of 2022, and which will be first deployed on C385, the first strategic model of the dedicated electric platform (EAP1).

Under the new EEA, VCU develops towards domain control integration
From the perspective of evolution process, automotive E/E architecture (EEA) will inevitably develop towards centralized EEA. From the perspective of mass-produced models, domain-centralized EEA prevail now. The quasi-central architecture consisting of the central computing platform + zonal controllers will be the next step for automakers who finally evolve towards the central computing architecture concentrating the functional logic to a central controller.
With the evolution of the vehicle's EEA, the "all-in-one" electric drive system will eventually be integrated into the domain control system. For example, Huawei's "seven-in-one" DriveONE electric drive system has the most eye-catching domain control solution. The integration of modules, systems, scenarios and solutions effectively improves the system security.
(1) VCUs are integrated into domain controllers
For the development of vehicle EEA, the VCUs of the domain control architecture can be integrated into domain controllers. For example, ENOVATE integrates VCU and BMS to form the first-generation power domain controller VBU with completely independent research and development.
Hardware: The VBU uses Infineon's tri-core processor, has rich I/O resources, and supports Fast Ethernet;
Software: AUTOSAR architecture. The software architecture and interface protocol comply with AUTOSAR 4.2.2;
Application: At present, the VBU has integrated vehicle control, battery management, charging control, and extended range control.
Huawei's CC architecture includes 3 central controllers (smart cockpit, vehicle control, and smart driving) and 4 zonal controllers. Among them, the vehicle domain control (VDC) integrates the original VCU, adopts VOS system, and is compatible with AutoSar.
On the VDC platform, Huawei will develop an MCU and a vehicle control operating system which will be open to automakers, allowing automakers to perform differentiated vehicle control based on the VDC platform.

In April 2021, BYD released the e-platform 3.0, which gradually integrates dozens of ECUs in the vehicle into domain controllers of intelligent power domain, intelligent vehicle control domain, intelligent cockpit domain and intelligent driving domain; wherein, intelligent power domain integrates the control part of VCU, BMS, Inverter, PDU, DC/DC and AC/DC.

(2) VCUs are integrated into central computing unit
Under the central computing architecture, the central gateway degenerates into multiple zonal gateways, and VCU functions will be integrated into the vehicle control unit of the central computing unit.
For example, Volvo's hybrid central architecture includes a central computing platform, an intelligent interconnection module (IHU), and an autonomous driving module (ADPM) to integrate the original domain controllers into a central computing platform.

ResearchInChina’s New Energy Vehicle VCU Industry Report, 2021 mainly studies the following contents:
Industry overview, market size, competitive landscape, etc. of VCUs for new energy vehicles;
Industry chain, status quo of upstream and downstream of VCUs for new energy vehicles;
The impact of the EEA reform on VCUs for new energy vehicles, the development trend of VCU technology, etc.;
VCU solutions of some OEMs (such as BYD, ENOVATE, Changan, etc.);
VCU solutions of major domestic and foreign suppliers.
Software-Defined Vehicles in 2026: Software Supply Chain Panorama and Business Models Research
Research on Automotive Software Business Models: Exploration of Token Economy, AI Service Revenue Sharing and Other Businesses
Under the Trend of AI Agents: Exploration of Business Models Based on T...
New Energy Commercial Vehicle 800-1000V High-Voltage Platform & Supply Chain Panorama Research Report, 2026
Research on 800V Architecture of Commercial Vehicles: New Energy Penetration Rate Exceeds 35%, and 800V Full-Domain High-Voltage Architecture Rapidly Penetrates Heavy-Duty Trucks
Explosive Growth in ...
ADAS and Autonomous Driving Tier 1 Suppliers Research Report, 2026 – Chinese Companies
Intelligent Driving Industry Leap: From Widespread L2.9 Adoption toward Physical AI and New Full?Domain Mobility Ecosystem
As vehicle intelligence advances, the installations and penetration rate of...
Vehicle-Road-Cloud Integration and C-V2X Industry Report, 2026
Vehicle-Road-Cloud and C-V2X Research: with the three-tier promotion system of "top-level planning + mandatory pilot + evaluation binding", the industry turning point is approachingThis report focuses...
China OEM Data Capability Analysis Report, 2026
OEM Data Capability Research: 24 OEMs × 9 Capability Domains, Who Takes the Lead?
An L4 autonomous driving R&D and test vehicle can generate approximately 10TB of raw data per single day — data v...
Autonomous Driving Domain Controller and Central Computing Unit (CCU) Industry Report, 2026
Autonomous Driving Domain Controller (ADCU) Research: One-Chip CCU solutions are quickly available in vehicles
In China's passenger car market, autonomous driving systems involved in mass production ...
Automotive EMS and ECU Industry Research Report, 2026
Automotive EMS Research: The boundaries between EMS providers and Tier1 suppliers are becoming blurred, and the supply chain model is evolving from a linear chain to a networked structure
Mainstream ...
Automotive Microcontroller Unit (MCU) and Application Scenario Research Report, 2026
Automotive MCU Research: Increased demand for redundant security drives ASIL D-compliant MCU shipments to exceed 100 million units
In a vehicle EEA, MCUs are widely distributed in various functional ...
China Intelligent Cockpit Patent Analysis Report, 2026
Intelligent Cockpit Patent Research: Cockpit AI, In?vehicle Health, and Infotainment Are Upgrade to Scenario?based and Proactive Functions
From a patent perspective, this report explores the cutting?...
Research Report on Application of VLA Large Model in Automobiles and Robots, 2026
Research on Automotive and Robot VLA: Hybrid Architectures Become Mainstream, VLA Integrates with General World Models, and Reinforcement Learning Serves as Core Engine
Vision?Language?Action (VLA) m...
China Charging Infrastructure (Supercharging, Battery Swapping, V2G, etc.) and High-Performance Supercharging Battery Research Report, 2026
Charging and battery swapping research: as 5C+ supercharging vehicle models go into mass production, the pace of OEMs self-building supercharging networks quickens
800-1000V high-voltage platforms ar...
China Passenger Car Electronic Controlled Suspension Industry Report, 2026
Electronic Controlled Suspension Industry Research: As the First Year of Full Active Suspension Unfolds, Three Technical Routes Race Forward
1. Penetration Rate Surges Three Times, and Electronic Con...
Intelligent Driving SoC Research Report, 2026
Research on Intelligent Driving SoCs: Competition Focus Shifts to L3/L4 Embedded Hardware, and Computing Power of Flagship Vehicle Models Exceeds 1,000 TOPS
In terms of intelligent driving system in...
Automotive AI Large Model Technology Research Report, 2026
Automotive AI Large Model Research: Competition Shifts from "Who Has the Stronger Model" to "Who Boasts Higher Link Efficiency"
ResearchInChina released the Automotive AI Large Model Technology Resea...
Intelligent Vehicle Cockpit Domain Controller Research Report, 2026
Cockpit domain controller research: L3 AIDV intelligent cockpit domain controllers are entering a boom period
Driven by multiple factors such as the continuous evolution of the automotive central int...
Automotive Acoustic System (Audio, Multi-Channel) Industry Report, 2026
Automotive Acoustics Research: Multiple Channels, AI Tuning, and Self-Developed Algorithms Drive the Transformation of High-End Cockpit Sound Fields
I. Automotive Audio Hardware Solutions with 6–9 S...
Autonomous Driving Sensor Chip Research Report, 2026
Research on Autonomous Driving Sensor Chips: Deeply Perceiving the Physical World, Sensor Chips Are Playing A “Leading Role” in Intelligence
In 2026, the autonomous driving sensor chip industr...
Passenger Car Corner Module and Wheel‑Side Control System Research Report, 2026
Wheel-side control research: the “last mile” chassis innovation
Wheel-side control dismantles the traditional drive, braking, steering, and suspension control of the chassis from a "centralized" styl...