Module cover plate, battery module and battery

The invention provides a module cover plate, a battery module and a battery, and relates to the technical field of batteries, through detachable connection among the module cover plate, a module end plate and a module bottom plate, a plurality of battery monomers are grouped, and a completely through heat dissipation channel is ensured among the plurality of battery monomers, so that not only is the installation and maintenance simple, but also the heat dissipation efficiency is improved. The heat dissipation of the battery monomers can be effectively improved, meanwhile, the busbars electrically connected with the battery monomers are detachably connected through bolts and are limited and fixed through the module cover plate, the convenience of installation and maintenance is further improved, the detection wiring harness is pressed between the busbars and the polar columns, the busbars are limited through the polar column slotted holes, and the busbars are connected and fixed through the bolts, so that the