Driving the Future of Energy: ITNOG Supports the Construction of CATL’s First Battery Plant Outside China
From 2022 to 2025, ITNOG GmbH delivered EPC project services for the G2 battery cell production building of Contemporary Amperex Technology Thuringia GmbH (CATT) in Arnstadt, Thuringia. CATT is the German subsidiary of CATL.
About the Client: CATL, the World’s Largest Battery Manufacturer
CATL (Contemporary Amperex Technology Co., Limited) is the global market leader in lithium-ion batteries for electric vehicles. In 2025, CATL held close to 40% of the global EV battery market. It is the only battery supplier in the world with a market share above 30%. Many of the world’s major carmakers, including BMW, Mercedes-Benz, Volkswagen and Tesla, use CATL batteries.
The Arnstadt site at the Erfurter Kreuz industrial area is CATL’s first production plant outside China and one of the most important industrial investments in Thuringia in recent decades. With a total investment of up to €1.8 billion, the plant is designed for a production capacity of 14 GWh per year and up to 2,000 jobs. Module production started in the G1 building in 2021. In December 2022, the first series-production lithium-ion cells came off the line in the G2 building.
Why CATL Trusted ITNOG
A battery cell factory is one of the most demanding types of industrial construction. Clean rooms, technical cleanliness and constant humidity control make it almost as complex as a semiconductor plant. A client of CATL’s size works only with partners whose processes are proven and independently verified.
ITNOG GmbH is certified to three international standards by SGS-TÜV Saar:
- ISO 9001:2015 – Quality Management
- ISO 14001:2015 – Environmental Management
- ISO 45001:2018 – Occupational Health and Safety
Our certified Integrated Management System gave CATL confidence that quality, safety and environmental requirements would be managed in a structured, auditable way from the first day on site. This was a key reason ITNOG was awarded the project.
Our Scope of Work
- Construction management: coordinating contractors, schedules and site activities
- Quality management and site inspections: inspections and acceptance according to client and regulatory requirements
- Technical documentation control: managing drawings, specifications, test reports and handover documents
- Contract and procurement support: supporting tendering, supplier management and contract follow-up
- Site engineering coordination: aligning engineering teams, suppliers and the client on site
Challenges and Results
The project ran during a period of global supply chain disruption. Our team tracked material and equipment deliveries closely and addressed potential delays early, before they could affect the critical path. We kept clear communication between CATL, contractors and suppliers throughout the project lifecycle and maintained high safety and quality standards on site.
Thanks to this structured approach, the project was delivered on time, with zero compliance issues during audits.
Experience That Shapes Our Work Today
The CATL project shows ITNOG’s ability to manage complex EPC projects in highly regulated, fast-moving industries. We are proud to have contributed to a facility that supports sustainable energy and electric mobility in Europe.
The experience gained on sites like this is built into our AI-based ITNOG Solution Platform, including AI Inspection & Quality Management and the AI Document Control System.
Planning a battery, energy or industrial construction project? Contact us to find out how ITNOG can support you.