Automotive Dark Factories

1. Definition and Conceptual Evolution

Dark factories (also known as "lights-out factories") refer to modern manufacturing facilities whose production processes are fully automated and intelligent. They are so named because they can theoretically operate non-stop in the dark without any on-site manual labour. At its core, this represents the real-world execution of Industry 4.0 in the manufacturing sector—leveraging "5G + Industrial Internet" as the backbone, and drawing upon advanced robotics, artificial intelligence (AI), digital twins, and the Industrial Internet of Things (IIoT) to establish an end-to-end automated closed loop from raw materials to the finished vehicle.

The concept of "lights-out manufacturing" traces its roots back to Japan in the 1980s. In recent years, driven by the "Made in China 2025" blueprint, dark factories have rapidly gained traction across China's automotive industry, marking a defining milestone in the sector's shift from labour-intensive to technology-driven production.

2. Core Technical Characteristics

The rollout of automotive dark factories hinges on the synergy of four key technological pillars:

• Advanced Robotics: Encompassing not just programmable robotic arms, but also automated guided vehicles (AGVs), autonomous mobile robots (AMRs), collaborative robots (cobots), and dedicated machinery engineered for high-precision welding and assembly.

• Artificial Intelligence and Machine Learning: AI algorithms optimise production workflows in real time, deliver predictive maintenance before faults occur, and carry out optical inspections with superhuman precision.

• Industrial Internet of Things (IIoT) : Sensors embedded across all machinery, tooling, and components create an interconnected data stream, granting the manufacturing ecosystem self-monitoring and self-correcting capabilities.

• 5G and Edge Computing: Ultra-low latency and high-bandwidth networks power real-time communication across thousands of connected devices, with edge computing handling on-site data processing for instantaneous decision-making.

3. Industrial Practice: Flagship Manufacturing Plants

Geely Xi'an Manufacturing Base: Serving as Geely's world-first "dark factory" covering all platform architectures, powertrain types, and model line-ups, this facility represents a total investment exceeding RM10,000,000,000 across a 2,260-mu footprint. Automation across stamping, welding, and paint shops reaches 100%, with flexible assembly lines capable of co-producing six models spanning three powertrain options (petrol, hybrid, and pure electric) on a single line. Model changeovers take just one minute, enabling a new vehicle to roll off the line every 60 seconds on average. The final assembly line features full automation for chassis marriage as well as windscreen, window glass, and tyre fitment, with 46 sets of bolts torqued simultaneously to a precision within 0.15 mm. The facility also houses a 52 MW photovoltaic solar array generating 53.76 million kWh annually, making it the first certified zero-carbon plant among China's domestic carmakers.

Changan Automobile Digital Intelligent Factory: Co-developed by Changan Automobile, China Unicom, and Huawei with an outlay of RM10,000,000,000, the site is hailed as Asia's largest "dark factory". It is equipped with over 1,400 robots and more than 650 intelligent AGVs, hitting a 100% automation rate across key processes. It also pioneers an integrated 7,700-tonne gigacasting dark production line that consolidates 163 individual components into just two, slashing production time from two hours down to two minutes. Deeply integrating over 40 advanced technologies including 5G, AI, and digital twins, the plant facilitates C2M (Customer-to-Manufacturer) flexible bespoke builds, enabling buyers to configure vehicle models, paint colours, trim specifications, and even estimated delivery schedules online.

ZF Automotive Systems: As one of the world's largest production hubs for braking and advanced driver assistance systems (ADAS), this facility has been rated an Excellence-level Smart Factory by China's Ministry of Industry and Information Technology (MIIT). Running on just four operators per shift, 80% of manufacturing decisions are AI-assisted, boosting overall equipment effectiveness (OEE) to 94%. Its proprietary intelligent scheduling system compresses traditional manual planning times of three to four hours down to just 10 minutes, securing a 99.5% schedule adherence rate.

4. Industry Trends: From Pioneer Showcase to Mainstream Adoption

The rollout of automotive "dark factories" in China is transitioning from flagship pilot projects led by industry giants to widespread adoption across the broader sector. As of 2025, China's industrial robot density has surged approximately sevenfold compared to 2015 levels, with new robot installations accounting for more than half of the global total. Gartner analysts project that by 2030, the world's first automaker to operate a 100% fully automated final assembly line will emerge from either China or the United States.

Nevertheless, "dark factories" still face practical hurdles: overall industry automation rates currently hover around 50%, final assembly shops are yet to achieve complete lights-out operation, and the full integration of humanoid/embodied robots with AI will take years to mature. From intelligent manufacturing plants to the upcoming "Dark Factory 2.0" era driven by fully autonomous resource allocation and predictive quality control, the technological revolution is only gaining momentum.