Battery monomer, battery and electric equipment

The utility model discloses a battery monomer, a battery and electric equipment. The battery monomer comprises a shell, an electrode assembly, a pressure relief mechanism and an insulating component, the shell comprises a first wall and a second wall connected with the first wall, the electrode assembly is arranged in the shell, the second wall surrounds the electrode assembly, a first gap is formed between the electrode assembly and the second wall, the pressure relief mechanism is arranged on the first wall, and the insulating component is arranged on the second wall. The insulating component is arranged between the first wall and the electrode assembly, the insulating component is used for forming an airflow channel communicated with the first gap, and the airflow channel extends to the pressure relief mechanism. In the battery monomer provided by the embodiment of the invention, the airflow channel formed by the insulating component is communicated with the first gap and the pressure relief mechanism, so that the blocking of the insulating component to gas flow is reduced, and the gas flow is facilitated; when the battery cell is subjected to thermal failure and the pressure relief mechanism is actuated, gas can quickly flow from the gas production area to the pressure relief mechanism so as to be discharged from the pressure relief mechanism, so that the risk of sealing failure of the first wall and the second wall is reduced, and the safety of the battery cell is improved.