Button cell and electronic device

A button cell, comprising a case, a cell and a conductive member;

• wherein the case comprises a bottom shell, and a top cover connected to the bottom shell in a sealed manner, the bottom shell and the top cover enveloping and forming an accommodating cavity for accommodating the cell;
• the top cover is provided with an opening in communication with the accommodating cavity, the conductive member covers the opening, and is connected to the top cover through a sealant ring in an insulated and sealed manner;
• the conductive member is further provided with a liquid injection port for injecting an electrolyte solution into the accommodating cavity, the liquid injection port being covered with a sealing member which is connected to the liquid injection port in a sealed manner;
• the cell has a first tab and a second tab, the first tab being electrically connected to the case, and the second tab being electrically connected to the conductive member;
• and
• the conductive member is provided with an extension part which passes through the opening and extends into the accommodating cavity;
• the extension part extends along a radial direction of a central axis of the opening towards the central axis of the opening to form the liquid injection port, and the extension part is located above the second tab;
• the sealing member is in a sheet structure, is located above the liquid injection port, and does not pass through the liquid injection port.