BATTERY MODULE, BATTERY PACK, AND POWER STORAGE DEVICE

Provided is a battery module having high efficiency and a high energy density by increasing degrees of freedom with respect to disposition of a connection member. The battery module includes a plurality of battery cells, an external terminal electrically connected to the plurality of battery cells and provided in front of or at rear of the plurality of battery cells, and a cover plate having electrical insulation properties, configured to cover at least one side of the plurality of battery cells, having an exposure hole formed to expose at least a portion of the external terminal, and including a protection portion having a plate shape protruding forward or rearward from each of both sides of the exposure hole in a left-right direction to form an accommodating space for accommodating a portion of the external terminal, and having an upper portion and a lower portion of the accommodating space being open.