Battery cover plate assembly and battery with same

The utility model discloses a battery cover plate assembly and a battery with the same. The battery cover plate assembly comprises a first cover plate, a second cover plate and a sealing element, a liquid injection hole penetrating in the thickness direction is formed in the first cover plate; a liquid leakage hole penetrating through the second cover plate in the thickness direction is formed in the second cover plate, and the second cover plate is arranged on one side of the first cover plate in the thickness direction and abuts against the lower surface of the first cover plate; the sealing piece is arranged between the first cover plate and the second cover plate, at least part of the sealing piece is contained in the liquid injection hole, and the sealing piece is selectively connected with the first cover plate to seal the liquid injection hole. According to the battery cover plate assembly disclosed by the utility model, after gas or electrolyte generated in the battery is consumed, the battery can be