Battery top cover assembly and battery

The utility model relates to the technical field of batteries, and discloses a battery top cover assembly and a battery, the battery top cover assembly comprises a top cover piece and a mounting assembly, the mounting assembly comprises a mounting plate obliquely arranged on the top cover piece, and a pole terminal of the battery penetrates through the mounting plate from the lower side of the mounting plate and extends to the upper side of the mounting plate; and an included angle is formed between the connecting end of the pole terminal and the top cover plate. When the battery module is assembled and the pole terminal is welded and fixed on the mounting plate on the top cover plate, as the mounting plate is obliquely arranged relative to the top cover plate, the pole terminal is also obliquely arranged relative to the top cover plate, a larger operation space can be provided for the welding of the pole terminal, the welding is more convenient, and the welding efficiency can be effectively improved; therefo