April 24, 2026 – The CATL Bedrock L4 Fully Redundancy Chassis was unveiled at the 2026 Beijing International Automotive Exhibition (Auto China 2026). Centered on the theme “Board the Era of Full Autonomy”, the showcase introduced eight core redundancy technologies designed for L4 autonomous driving. Developed by CAIT, a subsidiary of CATL, the Bedrock Chassis serves a wide passenger vehicle market. At this year’s auto show, the focus is on a purpose-built physical AI platform for autonomous driving, defined by uncompromising safety, superior efficiency, and high openness.

“AI is reshaping the automotive industry. We see the ‘brain’ of vehicles becoming increasingly powerful, yet few are asking whether the chassis, as the physical carrier, is capable of supporting AI-driven autonomous driving. We believe that in the era of true L4 autonomy, both safety and economics demand a chassis designed natively for autonomous driving, rather than one retrofitted from conventional passenger vehicles,” said Mr. Yang Hanbing, CEO of CAIT.

Mr. Cai Jianyong, Chief Technology Officer of CAIT, further elaborated on the technical logic behind the CATL Bedrock L4 Fully Redundancy Chassis. He noted that L4 autonomy represents a fundamentally new paradigm. Responsibility for driving safety is transferred from human fallback to system-level fail-safe capability, and vehicles evolve from consumer-facing products into productivity tools operating 24/7. As a result, native, ground-up development of L4 chassis becomes inevitable.

Based on validation results from thousands of extreme failure scenarios, CATL has integrated eight major redundancy systems into the Bedrock Chassis, including Low-Voltage Power Supply Redundancy, Communication Redundancy, Domain Controller Redundancy, Brake Redundancy, Steering Redundancy, High-Voltage Dual-Core Redundancy, e-Drive Redundancy, and Thermal Management Redundancy. Together, they cover all critical domains and are designed to reduce the downtime of autonomous vehicles caused by system failures to near zero. Beyond redundancy capabilities, the Bedrock Chassis strengthens safety assurance through physical protection and coordinated control between the ADS and the chassis, forming a three-layer safety architecture for L4 autonomy.

Built on advanced battery safety technologies, the CATL Bedrock Chassis establishes a comprehensive safety architecture spanning from cell to system, and from physical protection to coordinated control. Its applications cover both the mass production passenger vehicle market and RoboX scenarios. According to CAIT, in the passenger vehicle market, the company has established close partnerships with domestic partners such as BAIC, and has entered an advanced stage of mass production development with a leading global new energy vehicle brand. Future projects are expected to be deployed across multiple markets, including Europe and Southeast Asia. For L4 autonomous driving applications, CATL will work with partners across intelligent driving and mobility operations to jointly build a new intelligent ecosystem.