The low prescribed battery operating temperature (20° to 25°C), requires a refrigeration cooling system rather than direct ambient air cooling. From thermal management strategies to real-world case studies, this comprehensive guide will arm you with all the knowledge you need to keep your BESS cool and operational. What Are Battery Energy Storage Systems (BESS)? At its core, BESS comprises individual battery units. In this post, we'll explore three popular battery thermal management systems; air, liquid & immersion cooling, and where each one fits best within battery pack design. Here's a breakdown of the pros, cons and ESS recommendations. Effective cooling is crucial in battery storage systems to prevent overheating, ensure longer battery lifespan, and optimize efficiency.