Battery module and battery pack

The invention relates to the technical field of energy storage devices, and discloses a battery module and a battery pack. The battery module comprises a shell, a top cover assembly and a plurality of naked battery cells, and an inner cavity of the shell is divided into a plurality of mounting cavities by partition plates. The naked battery cell is accommodated in the mounting cavity, the top cover assembly comprises a top cover plate and a pin, the connecting surface of the pin faces the extending direction of the tab and deviates from the end part, and the tab is bent towards the connecting surface and is welded on the connecting surface, so that the space occupied by the pin between the end part and the side wall of the naked battery cell along the extending direction of the tab can be effectively reduced; and the battery energy density can be effectively improved. Moreover, the connecting surfaces facing the extending direction of the tabs enlarge the welding operation space of the tabs and the pins, the