Top cover assembly, battery monomer and battery

Abstract

The utility model relates to a top cover assembly, a battery monomer and a battery. The top cover assembly comprises a cover plate and a lower insulating part, at least one pole hole is formed in the cover plate, the cover plate comprises a first surface and a second surface which are oppositely arranged in the thickness direction of the cover plate, and the lower insulating part is arranged on the second surface; the terminal post comprises a main body and an annular flange part arranged at one end of the main body, the main bodies are inserted into the terminal post holes in a one-to-one correspondence manner, the sealing rings are sleeved on the main bodies of the terminal post in a one-to-one correspondence manner, and at least partial structure of each sealing ring is clamped between the flange part of the terminal post and the first surface; and the insulating film layer covers the first surface of the cover plate and continuously extends to the peripheral surface of each flange part so as to seal and shield the peripheral side of the sealing ring. According to the top cover assembly, the battery monomer and the battery, the service life of the sealing ring is longer, and the sealing reliability is better.

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