The invention discloses a
lithium ion battery intermediate tab roll core. The
lithium ion battery intermediate tab roll core comprises an intermediate tab
cathode plate, an intermediate tab
anode plate and a diaphragm, two blank sections are arranged in the middle of a
cathode material layer, a
cathode tab is fixed at one blank section, the intermediate tab
anode plate comprises an
anode materiallayer, an anode tab is fixed at the blank section, and the intermediate tab cathode plate, the intermediate tab anode plate and the diaphragm are spirally wound and adhered together; and the anode material layer of the intermediate tab anode plate is wound and adhered with the
cathode material layer of the intermediate tab cathode plate in a gapless manner through the diaphragm. According to the invention, the anode material layer of the intermediate tab anode plate is wound and attached to the
cathode material layer of the intermediate tab cathode plate in a gapless manner through the diaphragm, namely the anode tab and the
cathode material layer are avoided, the surface of the cathode material layer of the intermediate tab cathode plate, which faces the anode tab, is provided with a corresponding groove, and the anode tab is partially accommodated in the groove of the cathode material layer, so that the
lithium separation risk caused by no anode at the
welding position is avoided.