Battery module

The invention discloses a battery module, which comprises battery cores, battery core separators, end plates, side plates, electrical isolation plates, connecting sheets, wire harnesses and an upper cover. The battery core separators are arranged between every two adjacent battery cores; the battery cores and the battery core separators are fixed into a plurality of small assemblies through UV glue, and the plurality of small assemblies are stacked; the end plates are arranged at the two ends of each small assembly in the stacking direction; side plates are arranged on the two sides of each small assembly in the stacking direction; the end plates are welded to the side plates; and the battery cores are connected in series or in parallel through the connecting sheets to form the battery module. The problem that the thickness tolerance of the battery cores and the battery core separators is large is solved by controlling the glue thickness of the UV glue, and the precision requirement ofthe length of the module