A composite end plate for a battery module, the battery module comprises two said composite end plates and two side plates, characterized in that the composite end plate comprises: an end plate body comprising a first surface and a second surface disposed opposite to each other in its thickness direction, wherein the end plate body comprises a first connecting segment, an intermediate transitional segment and a second connecting segment disposed successively in its width direction, and the first connecting segment and the second connecting segment are adapted to respectively connect to other structural components outside of the battery module through screw mounting holes; and a rigid connecting plate, wherein the rigid connecting plate and the end plate body are made of different materials, the rigid connecting plate is made of metal material, the rigid connecting plate comprises a transferring segment and a connecting arm extending from the transferring segment toward the end plate body, the connecting arm is embedded into the intermediate transitional segment such that the rigid connecting plate and the end plate body are fixedly connected, the transferring segment is located at the second surface and extends in a height direction of the end plate body, and a surface of the transferring segment away from the intermediate transitional segment is exposed to external environment and can be fixedly connected to an external structural component, wherein the end plate body further comprises a receiving groove at the intermediate transitional segment, which has a shape matching with that of the transferring segment, and the transferring segment falls into the receiving groove such that a surface of the transferring segment away from the end plate body is flush with the second surface, and wherein the connecting arm comprises a first extending segment and a second extending segment intersecting with each other, wherein the connecting arm is connected to the transferring segment through the first extending segment, and the first extending segment intersects with the transferring segment; characterized in that the rigid connecting plate is disposed at the intermediate transitional segment of the end plate body; the end plate body further comprises a receiving groove at the intermediate transitional segment, which has a shape matching with that of the transferring segment, and the transferring segment falls into the receiving groove such that a surface of the transferring segment away from the end plate body is flush with the second surface; and the second extending segment comprises a recess and/or a protrusion at a surface for contacting with the end plate body. an end plate body comprising a first surface and a second surface disposed opposite to each other in its thickness direction, wherein the end plate body comprises a first connecting segment, an intermediate transitional segment and a second connecting segment disposed successively in its width direction, and the first connecting segment and the second connecting segment are adapted to respectively connect to other structural components outside of the battery module through screw mounting holes; and a rigid connecting plate, wherein the rigid connecting plate and the end plate body are made of different materials, the rigid connecting plate is made of metal material, the rigid connecting plate comprises a transferring segment and a connecting arm extending from the transferring segment toward the end plate body, the connecting arm is embedded into the intermediate transitional segment such that the rigid connecting plate and the end plate body are fixedly connected, the transferring segment is located at the second surface and extends in a height direction of the end plate body, and a surface of the transferring segment away from the intermediate transitional segment is exposed to external environment and can be fixedly connected to an external structural component, wherein the end plate body further comprises a receiving groove at the intermediate transitional segment, which has a shape matching with that of the transferring segment, and the transferring segment falls into the receiving groove such that a surface of the transferring segment away from the end plate body is flush with the second surface, and wherein the connecting arm comprises a first extending segment and a second extending segment intersecting with each other, wherein the connecting arm is connected to the transferring segment through the first extending segment, and the first extending segment intersects with the transferring segment; characterized in that the rigid connecting plate is disposed at the intermediate transitional segment of the end plate body; the end plate body further comprises a receiving groove at the intermediate transitional segment, which has a shape matching with that of the transferring segment, and the transferring segment falls into the receiving groove such that a surface of the transferring segment away from the end plate body is flush with the second surface; and the second extending segment comprises a recess and/or a protrusion at a surface for contacting with the end plate body.