Lithium battery module

The utility model discloses a lithium battery module and belongs to the technical field of battery modules. The battery pack comprises a lower shell, a battery cell group, an upper cover and a protection plate which are sequentially arranged from bottom to top, wherein the battery cell group is embedded in the lower shell. According to the battery module, on one hand, a first semi-cylindrical groove, a first gluing groove and a first step surface on the lower shell are matched with one another, so that a cylindrical battery cell is placed in the lower shell, and a second semi-cylindrical groove, a second gluing groove and a second step surface on the upper cover are arranged, and a female buckle of the upper cover is buckled on a male buckle of the lower shell; on the other hand, the protection plate is arranged above the upper cover through the locking screw and is fixed in a glue manner, so that the aim of stabilizing the internal cylindrical battery core is fulfilled, and compared with the prior art, the c