Introduction
The CATL BESS product brochure introduces the structure and safety design of their Battery Energy Storage Systems (BESS). It highlights the comprehensive safety measures integrated into the system, including the Battery Management System (BMS) and various safety certifications.

Product Structure and Safety Design
The BESS is structured into several components: Cell, Module, Rack, and System. Safety is prioritized through chemical safety, thermal management, and functional safety. The system is compliant with standards such as UL 9540A, IEC 62477-1, and NFPA requirements, ensuring no propagation of faults between cells or modules.

Safety Management
Key safety features include online monitoring of battery state, fault diagnostics, and error handling. The system supports active and passive balancing, insulation monitoring, and historical data recording. It is designed for a service life of over 20 years with stable chemical bonds and reliable venting.

Cooling Solutions
The brochure details both air and liquid cooling solutions for the BESS. Air cooling solutions are available for modules and racks with specific dimensions and capacities. Liquid cooling solutions are offered for both indoor and outdoor applications, ensuring efficient thermal management.

Residential Solutions
CATL provides residential energy storage solutions with varying cell capacities and cycle lives. These products comply with international safety standards such as IEC 62619 and UL 1973, ensuring safe and reliable operation.

Certifications and Compliance
The BESS products are certified under multiple international standards, including UL 9540A, IEC 62619, and EMC standards, ensuring their safety and reliability in global markets.