Abstract: The present disclosure provides a battery module. The battery module includes a plurality of secondary batteries stacked along a thickness direction, a top of each secondary battery being provided with an electrode terminal; and a connecting component provided at the top of the secondary battery, the connecting component being connected to at least two electrode terminals for electrically connecting at least two secondary batteries. The connecting component includes a first fixed connecting piece and a second fixed connecting piece, and along an extending direction of the connecting component, the first fixed connecting piece matches and is engaged with the second fixed connecting piece. The present disclosure solves the problem of the unreliable connection between the connecting component and the electrode terminal.

Abstract: Provided is a battery pack with an improved sealing force, the battery pack including: a lower case having a space therein and having a groove portion formed to extend along a certain width of an outer top surface; an upper case arranged on the lower case; a battery unit accommodated in an internal space of the lower case and including a plurality of battery cells; and a sealing member inserted into the groove portion to be located between the upper case and the lower case, wherein a cross-sectional shape thereof has an upper surface, a lower surface, and a side surface connecting the upper surface to the lower surface, the upper surface is formed as a curved surface convexed toward the upper case, and a protrusion portion forming a step with the upper surface is located at the side surface.