Battery module end cover, shell and battery module

The utility model relates to a battery module end cover, a shell and a battery module, and relates to the technical field of batteries. The second end plate is arranged on one side of the first end plate and connected with the first end plate, first supporting plates extending towards the first end plate are arranged at the two ends of the second end plate in the length or width direction, and the first supporting plates are located on the inner side of the outer edge of the first end plate and abut against the first end plate. On the premise of ensuring that the battery module shell has enough structural strength, the thickness and the weight of the end plate are reduced, the structure is simple, and assembly is facilitated. 本申请涉及一种电池模组端盖、外壳及电池模组，涉及电池技术领域，该电池模组端盖包括：第一端板；第二端板，其设于所述第一端板一侧，并与所述第一端板连接，所述第二端板长度或者宽度方向的两端设有向所述第一端板延伸的第一支撑板，所述第一支撑板位于所述第一端板的外缘内侧，并抵持在所述第一端板上。本申请在保证电池模组外壳具有足够的结构强度的前提下，减轻了端板的厚度与重量，结构简单，利于组装。