A battery pack, comprising: a case , comprising an accommodating cavity and a drain hole in communication with the accommodating cavity ; a battery module contained inside the accommodating cavity ; and a blocking member , mounted to the case and located between the drain hole and the battery module to block a binder for fixing the battery module from entering the drain hole ; wherein the blocking member comprises: a connecting plate fixedly connected to the case ; and an upright plate connected to the connecting plate , wherein the upright plate extends along a height direction of the battery module ; wherein the blocking member has a length of LI, and there is a farthest distance of L2 between the side wall of the first drain hole and the side wall of the second drain hole , wherein L1 is greater than L2; the first drain hole and the second drain hole are two of the drain holes located at both ends of a row of drain holes adjacent to an end of the battery module in a length direction; the blocking member is configured to block a binder for fixing the battery module from entering the drain hole in a width direction of the case ; wherein the blocking member and the drain hole are disposed at the same wall of the case . a case , comprising an accommodating cavity and a drain hole in communication with the accommodating cavity ; a battery module contained inside the accommodating cavity ; and a blocking member , mounted to the case and located between the drain hole and the battery module to block a binder for fixing the battery module from entering the drain hole ; wherein the blocking member comprises: a connecting plate fixedly connected to the case ; and an upright plate connected to the connecting plate , wherein the upright plate extends along a height direction of the battery module ; wherein the blocking member has a length of LI, and there is a farthest distance of L2 between the side wall of the first drain hole and the side wall of the second drain hole , wherein L1 is greater than L2; the first drain hole and the second drain hole are two of the drain holes located at both ends of a row of drain holes adjacent to an end of the battery module in a length direction; the blocking member is configured to block a binder for fixing the battery module from entering the drain hole in a width direction of the case ; wherein the blocking member and the drain hole are disposed at the same wall of the case . a connecting plate fixedly connected to the case ; and an upright plate connected to the connecting plate , wherein the upright plate extends along a height direction of the battery module ; wherein the blocking member has a length of LI, and there is a farthest distance of L2 between the side wall of the first drain hole and the side wall of the second drain hole , wherein L1 is greater than L2; the first drain hole and the second drain hole are two of the drain holes located at both ends of a row of drain holes adjacent to an end of the battery module in a length direction; the blocking member is configured to block a binder for fixing the battery module from entering the drain hole in a width direction of the case ; wherein the blocking member and the drain hole are disposed at the same wall of the case . <EOS>