ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS

A wound electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. The positive electrode sheet includes a positive electrode current collector and a positive electrode material layer located on a surface of the positive electrode current collector. The negative electrode sheet includes a negative electrode current collector and a negative electrode material layer located on a surface of the negative electrode current collector. The positive electrode current collector is an aluminum foil, a thickness of the positive electrode current collector is Ha μm, a tensile strength of the positive electrode current collector is Ta MPa, the negative electrode current collector is a copper foil, a thickness of the negative electrode current collector is Hc μm, a tensile strength of the negative electrode current collector is Tc MPa, and a conductivity of the electrolyte is S mS/cm, satisfying: 1.6≤Ta×Ha/(Tc×Hc)+0.1S≤3.