The invention discloses a
lithium battery core and a manufacturing method. The
lithium battery core comprises at least one positive
electrode sheet, at least one negative
electrode sheet and at least one diaphragm, wherein the positive
electrode sheet comprises a
positive current collector and a positive electrode active material, the
positive current collector comprises a plurality of first small sheets which are parallel at intervals, the adjacent first small sheets are connected by bent blank areas, the positive electrode active material is coated on the side surface of the first small sheet, the negative electrode sheet comprises a negative
current collector and a negative electrode active material, the negative
current collector comprises a plurality of second small sheets which are parallel at intervals, the adjacent second small sheets are connected by bent blank areas, the diaphragm is bent in an S shape, and the first small sheets and the second small sheets are sequentially and alternately connected to the space formed after the diaphragms are bent and between the adjacent diaphragms, and are connected with the diaphragms. The manufacturing method comprises the steps of inserting, folding and combining. According to the invention, the electrode sheets are fixed, the short-circuit risk of the battery core is reduced, the production efficiency is improved, the lamination qualification rate can be effectively improved, and the production process is effectively simplified.