A lithium battery core is disclosed, wherein a positive electrode tab set and a negative electrode tab set are formed respectively on both sides of a roll core in a lower housing. A first wiring component is connected to a second wiring component on a lid plate. The first wiring component is electrically connected to the first positioning part of a negative conduction sheet. The second wiring component is electrically connected to the second positioning part of a positive conduction sheet. A first extending part extends downward in the direction approximately perpendicular to a first positioning plate from one side of the first positioning plate. The first extending part is connected to the negative electrode tab set. A second extending part extends downward in the direction approximately perpendicular to a second positioning plate from one side of the second positioning plate. The second extending part is connected to the positive electrode tab set. Accordingly, the positive conduction sheet and the negative conduction sheet can form electrical connection with the positive electrode tab set and the negative electrode tab set of the roll core respectively in the manner of large area, so as to satisfy the charging and discharging demands of high magnification large current.