BATTERY PACK HAVING STRUCTURE FOR PREVENTING HEAT DIFFUSION BETWEEN ADJACENT BATTERY MODULES, AND ESS AND VEHICLE INCLUDING SAME

The present invention relates to a battery pack and ESS and vehicle including the same. The batter pack includes a battery module stack configured to include a first battery module and a second battery module disposed adjacent to each other; a battery pack case configured to accommodate the battery module stack; a heatsink interposed between a lower portion of the battery module stack and the battery pack case or provided to contact a bottom of the battery pack case; a heat spreader sheet interposed between the first battery module and the second battery module; and an thermal insulation pad interposed between the first battery module and the second battery module.