BATTERY CELL, BATTERY AND ELECTRIC DEVICE

Disclosed in the embodiments of the present application are a battery cell, a battery and an electric device. The battery cell comprises: an electrode assembly, wherein the electrode assembly comprises a positive electrode sheet, the positive electrode sheet comprises a positive electrode active material capable of realizing reversible de-intercalation and intercalation of metal ions, and the positive electrode active material comprises a compound containing nickel; and a case, which is used for accommodating the electrode assembly, wherein the melting point of at least some regions of the case is p, and p satisfies: 1200 °C ≤ p ≤ 2000 °C. 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.