The invention discloses a
battery cell and a preparation method thereof, a battery and
electronic equipment, and the preparation method of the
battery cell comprises the following steps: obtaining a
pole piece which is provided with a main
body area and a first empty foil area which are distributed along the length direction of the
pole piece; the first empty foil area is located at the ending end of the main
body area, the first empty foil area comprises a first leading-out section and a second leading-out section, the first leading-out section is connected with the main
body area, and the second leading-out section is used for being connected with a first
pole piece; folding the second leading-out section of the first empty foil area to one side of the width direction of the pole piece; winding the pole piece by taking the ending end of the main body area as a terminal to obtain a winding core; first
adhesive paper is pasted to the side face of the roll core, so that the first
adhesive paper covers the ending end of the roll core, and part of the first
adhesive paper is located on the side, close to the center of the roll core, of the first leading-out section; and folding the second leading-out section to one side, deviating from the center of the roll core, of the first gummed paper to obtain the battery core.