A battery module (M), wherein the battery module (M) 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 (X) of the battery module (M), and face toward a width direction (Y) of the battery module (M), 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 (Z) of the battery module (M), 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 (Z), 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 (X) and the width direction (Y) are both parallel to the first cover plate and the second cover plate , and the height direction (Z) 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 (X) of the battery module (M), and face toward a width direction (Y) of the battery module (M), 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 (Z) of the battery module (M), 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 (Z), 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 (X) and the width direction (Y) are both parallel to the first cover plate and the second cover plate , and the height direction (Z) is perpendicular to the first cover plate and the second cover plate . <EOS>