Battery cell, battery, and electric device

Abstract

A battery monomer, a battery and an electric device. The battery monomer comprises a housing component, a pole component and an electrode component, the housing component comprises a mounting wall; the pole component is mounted on the mounting wall and comprises a pole body; the electrode component is accommodated in a receiving cavity and comprises an active material coating part, a conductive part and an insulating part, the conductive part is connected between the active material coating part and the pole body; at least part of the insulating part is arranged between the end part where the active material coating part and the conductive part are connected and the pole body; the insulating part is provided with a relief hole; the insulating part blocks the part where the conductive part passes through the insulating part and is connected with the pole body, and the active material coating part. In the technical scheme of the embodiment of the application, the insulating part can reduce the risk that the active material coating part is exposed and causes the mounting wall of the housing component to be corroded, and can also reduce the probability that the conductive part is reversely inserted into the inside of the active material coating part due to redundancy, thereby improving the use reliability of the battery monomer.

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