A battery module, wherein the battery module comprises: battery cells, wherein the battery cell comprises a housing, a top cover, and an electrode assembly, the housing is connected to the top cover, the housing comprises a first accommodation cavity, the electrode assembly is located inside the first accommodation cavity, the top cover is provided with a positive electrode terminal and a negative electrode terminal, the positive electrode terminal and the negative electrode terminal are arranged along a length direction of the battery module, and face toward a width direction of the battery module, and the battery cells further comprise a failed battery cell; and a conductive component, wherein the conductive component is connected to the positive electrode terminal and the negative electrode terminal of the failed battery cell; wherein along a height direction of the battery module, the housing comprises a first cover plate and a second cover plate that are arranged opposite each other, and both the first cover plate and the second cover plate are connected to the top cover; and in the failed battery cell, the first cover plate and/or the second cover plate is provided with an opening, the opening is toward the height direction, the conductive component enters the first accommodation cavity through the opening and resides inside the first accommodation cavity, and the failed battery cell comprises no electrolyte; and wherein the length direction and the width direction are both parallel to the first cover plate and the second cover plate, and the height direction is perpendicular to the first cover plate and the second cover plate. battery cells, wherein the battery cell comprises a housing, a top cover, and an electrode assembly, the housing is connected to the top cover, the housing comprises a first accommodation cavity, the electrode assembly is located inside the first accommodation cavity, the top cover is provided with a positive electrode terminal and a negative electrode terminal, the positive electrode terminal and the negative electrode terminal are arranged along a length direction of the battery module, and face toward a width direction of the battery module, and the battery cells further comprise a failed battery cell; and a conductive component, wherein the conductive component is connected to the positive electrode terminal and the negative electrode terminal of the failed battery cell; wherein along a height direction of the battery module, the housing comprises a first cover plate and a second cover plate that are arranged opposite each other, and both the first cover plate and the second cover plate are connected to the top cover; and in the failed battery cell, the first cover plate and/or the second cover plate is provided with an opening, the opening is toward the height direction, the conductive component enters the first accommodation cavity through the opening and resides inside the first accommodation cavity, and the failed battery cell comprises no electrolyte; and wherein the length direction and the width direction are both parallel to the first cover plate and the second cover plate, and the height direction is perpendicular to the first cover plate and the second cover plate.