Spirally wound electrode assembly, battery cell, battery and electric apparatus

A method for manufacturing a wound electrode assembly, comprising:

• providing an electrode sheet, wherein the electrode sheet includes a winding ending section, and the winding ending section is provided with a plurality of first tabs;
• and
• winding the electrode sheet, so that the plurality of the first tabs are laminated;
• wherein, among any two adjacent first tabs, a width of the first tab of the two adjacent first tabs that is closest to the winding center of the wound electrode assembly is greater than a width of the first tab of the two adjacent first tabs that is away from the winding center;
• wherein
• the electrode sheet further comprises a winding start section connected with the winding ending section, the winding start section is provided with at least one second tab, the at least one second tab and the plurality of the first tabs being laminated;
• and a width of the at least one second tab is greater than or equal to the width of a first tab that is closest to the winding center among the plurality of first tabs.

A manufacturing apparatus for a wound electrode assembly, comprising:

• a providing means, configured to provide an electrode sheet, wherein the electrode sheet comprises a winding ending section, and the winding ending section is provided with a plurality of first tabs;
• and
• an assembling means, configured to wind the electrode sheet around a winding center, so that the plurality of the first tabs are laminated;
• wherein, among any two adjacent first tabs, a width of the first tab of the two adjacent first tabs that is closest to the winding center of the wound electrode assembly is greater than a width of the first tab of the two adjacent first tabs that is away from the winding center;
• wherein the electrode sheet further comprises a winding start section connected with the winding ending section, the winding start section is provided with at least one second tab, the at least one second tab and the plurality of the first tabs being laminated;
• and
• a width of the at least one second tab is greater than or equal to the width of a first tab that is closest to the winding center among the plurality of first tabs.