BATTERY CELL, BATTERY AND ELECTRIC DEVICE

Disclosed in embodiments of the present application are a battery cell, a battery and an electric device. The battery cell comprises: an electrode assembly, the electrode assembly comprising a negative electrode sheet, the negative electrode sheet comprising a negative electrode active material from/into which metal ions can be reversibly deintercalated/intercalated, and the negative electrode active material comprising a silicon-based material; and a casing used for accommodating the electrode assembly, the tensile strength of at least partial area of the casing at the temperature of 25 °C being Rm, and Rm meeting: 250 MPa ≤ Rm ≤ 2000 MPa. According to the battery cell, the battery and the electric device in the embodiments of the present application, the reliability of the battery cell can be improved.