Current collector disc processing method, current collector disc, battery cell, and electrical apparatus

A current collector disc processing method, comprising the steps of :

• a punching step of providing a first sheet stock, wherein the first sheet stock comprises a pre-punched region, the pre-punched region is divided into a hole forming region and a welding region surrounding the hole forming region, and a first hole for a tab to be placed in cooperation is formed in the hole forming region;
• a stacking step of providing a second sheet stock, and stacking the second sheet stock with the first sheet stock so that the second sheet stock covers the pre-punched region;
• a welding step of welding the first sheet stock and the second sheet stock in the welding region;
• and
• a cutting step of cutting the first sheet stock and the second sheet stock along an edge of the pre-punched region to obtain a current collector disc;
• wherein in the current collector disc, a part formed by cutting the first sheet stock is an annular sheet, the annular sheet is configured to connect to a housing, a part formed by cutting the second sheet stock is a connecting disc, the connecting disc is configured to connect to the tab, and a position where the connecting disc and the annular sheet are connected by welding forms a welding mark region.