Lithium core battery pack convenient to replace

The invention discloses a lithium core battery pack convenient to replace. The lithium core battery pack includes an outer casing and an inner casing. The inner casing is movably disposed in the outercasing, the surfaces of the two sides of the inner casing are provided with lithium core mounting grooves for placing lithium core bodies, an upper electrical contact and a lower electrical contact are fixed at the upper end and the lower end of each lithium core mounting groove respectively, the end of the outer casing is rotatably connected with a clamping plate, one end of the clamping plate is movably clamped with the inner casing, and the bottom of an inner chamber of the outer casing is fixedly connected with a push plate through a first spring. According to the lithium core battery pack, through mutual matching of a sliding rail and a sliding groove, the inner casing is conveniently pushed into the outer casing, a clamping block at the end of the clamping plate can be pushed automatically into the clamping groove of the inner casing under the action of a second spring, to clamp the inner casing; by pressing of the clamping plate, the clamping block is separated from the clamping groove; at the same time, under the action of the first spring, the push plate is driven to automatically push the inner casing out, and the inner casing is taken out conveniently through a handle to replace the lithium core bodies.