Battery, battery pack, battery package and power-consuming device

Abstract

Battery, characterized in that it comprises a cover assembly (10), wherein the cover assembly (10) has an inside and an outside, and the direction from the inside to the outside is a first direction; wherein the cover assembly (10) comprises a terminal pin (11), a cover body (12), a sealing ring (13), and an inner washer (14), wherein the sealing ring (13) is arranged between the cover body (12) and the terminal pin (11) to seal a gap between the cover body (12) and the terminal pin (11); wherein the terminal pin (11) is provided with an inner flange (111), and at least one vent groove (15) is provided at the contact point between the inner flange (111) of the terminal pin (11) and the inner washer (14), wherein the individual vent groove (15) is designed to separate the area inside the inner washer (14) from the area outside the The inner flange (111) connects.