SHELL, BATTERY CELL, BATTERY, AND ELECTRIC DEVICE

Disclosed in embodiments of the present application are a shell, a battery cell, a battery, and an electric device. At least partial area of a shell 211 has a tensile strength Rm at a temperature of 25 °C. At least part of the shell 211 comprises first shell walls 2112, the average thickness of the first shell walls 2112 is T, Rm and T satisfy the following: 250 MPa ≤ Rm ≤ 2000 MPa, 0.05 mm ≤ T ≤ 0.5 mm, and 60 mm·MPa ≤ T × Rm ≤ 500 mm-MPa. According to the shell, the battery cell, the battery, and the electric device of the embodiments of the present application, the performance of the battery cell can be improved.