BATTERY MODULE AND ENERGY STORAGE DEVICE

The present disclosure relates to a battery module and energy storage device, including at least two battery cells, each of the at least two battery cells having a respective top cover; at least one bus-bar, each of the at least one bus-bar being arranged above two respective adjacent top covers, and electrically connected to poles provided on the two adjacent top covers; and a liquid cooling tube provided on all the top covers and cooperates with the at least one bus-bar for heat transfer.