A battery module, comprising: a plurality of battery cells stacked together; a battery box, comprising: at least two end plates; at least two side plates, wherein one end plate is provided between adjacent side plates, a cavity of the battery box is enclosed and formed by the end plates and the side plates and the plurality of battery cells stacked together are provided in the cavity; wherein a plurality of welding members are formed by bending an end portion of an end plate for enclosure for multiple times; and each welding member is welded to a corresponding side plate; wherein the end portion of the end plate for enclosure is bent twice to form two welding members, and the two welding members are attached to each other; the end portion of the end plate for enclosure is bent in a direction away from the cavity of the battery box to form a first welding member, and the end portion of the end plate for enclosure is bent in the direction deviating from the adjacent side plate to form a second welding member, wherein the first welding member and the second welding member are attached to each other. a plurality of battery cells stacked together; a battery box, comprising: at least two end plates; at least two side plates, wherein one end plate is provided between adjacent side plates, a cavity of the battery box is enclosed and formed by the end plates and the side plates and the plurality of battery cells stacked together are provided in the cavity; wherein a plurality of welding members are formed by bending an end portion of an end plate for enclosure for multiple times; and each welding member is welded to a corresponding side plate; wherein the end portion of the end plate for enclosure is bent twice to form two welding members, and the two welding members are attached to each other; the end portion of the end plate for enclosure is bent in a direction away from the cavity of the battery box to form a first welding member, and the end portion of the end plate for enclosure is bent in the direction deviating from the adjacent side plate to form a second welding member, wherein the first welding member and the second welding member are attached to each other. at least two end plates; at least two side plates, wherein one end plate is provided between adjacent side plates, a cavity of the battery box is enclosed and formed by the end plates and the side plates and the plurality of battery cells stacked together are provided in the cavity; wherein a plurality of welding members are formed by bending an end portion of an end plate for enclosure for multiple times; and each welding member is welded to a corresponding side plate; wherein the end portion of the end plate for enclosure is bent twice to form two welding members, and the two welding members are attached to each other; the end portion of the end plate for enclosure is bent in a direction away from the cavity of the battery box to form a first welding member, and the end portion of the end plate for enclosure is bent in the direction deviating from the adjacent side plate to form a second welding member, wherein the first welding member and the second welding member are attached to each other.