The utility model belongs to the technical field of batteries, and discloses a cover plate
assembly and a battery, the cover plate
assembly is connected with a
battery cell, the cover plate
assembly comprises a cover plate body, a pole, a conductive block, upper
plastic cement and an anti-twist block, and the pole is arranged on the cover plate body; the conductive block is electrically connected with one end, deviating from the
battery cell, of the pole; the upper plastic is arranged between the conductive block and the cover plate body; the anti-twisting block penetrates through the upper plastic, a containing groove is formed in the surface, deviating from the
battery cell, of the cover plate body, an anti-twisting groove is formed in the surface, facing the cover plate body, of the conductive block, and the two ends of the anti-twisting block are inserted into the containing groove and the anti-twisting groove respectively so as to limit the relative positions of the conductive block, the upper plastic and the cover plate body; insulation protrusions are arranged on the surface, facing the cover plate body, of the upper plastic and correspond to the anti-twisting blocks in position, and the insulation protrusions are arranged around the ends, facing the cover plate body, of the anti-twisting blocks. Therefore, the insulating bulge can prevent foreign matters from being electrically connected with the conductive block or the cover plate body, so that the risk of
short circuit is reduced, and the safety of the battery is improved.