Coiled type battery pole, preparation thereof and battery comprising the pole

Abstract

The invention relates to a winding type battery pole piece and a preparation method thereof and a battery of the pole piece. The winding type battery pole piece comprises a positive plate, diaphragm paper and a negative plate, which are stacked and wound in sequence; the positive plate is arranged in the diaphragm paper, the width direction of which is folded, and the negative plate is arranged at the outside of the folded diaphragm paper. The preparation method of the winding type battery pole piece comprises: the diaphragm paper is prepared; the positive plate is arranged in the diaphragm paper, the width direction of which is folded; and the positive plate is completely covered, the negative plate is arranged on a folding surface outside of the diaphragm paper and is wound for obtaining the winding type battery pole piece. The battery comprises an anode cap, a battery shell, and the winding type battery pole piece and electrolytic solution sealed in the battery shell. The winding type battery pole piece is the pole piece provided by the invention. The battery provided by the invention prevents battery short circuit caused by the contact of the positive piece and the bottom of the battery shell owning to the sinking of the polar piece.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a winding battery pole core, a preparation method thereof and a battery comprising the pole core. Background technique [0002] Such as figure 1 As shown, at present, the separator paper used in the winding pole core in the battery is to cut the separator paper into a strip slightly wider than the positive and negative electrodes by 0.5mm-2mm, and then fold the separator paper 1 in half along the length direction, In order to avoid damage to the separator paper 1 by the edges and corners at the end of the pole piece, place a small paper 2 that is the same width as the separator paper 1 and folded in half at the inside of the separator paper 1, and then put it in the folded small paper 2. The positive electrode sheet 3 that is longer than the folded small paper 2 and shorter than the length of the separator paper 1 folded in half and the tab 4 of the positive electrode sheet 3 is exposed...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing battery winding type pole core that when the positive and negative pole pieces sink, an insulating gasket needs to be placed at the bottom of the steel shell to prevent the short circuit of the battery from contacting the positive pole piece with the bottom of the steel shell To provide a winding battery pole core and a battery that does not need to place an insulating gasket at the bottom of the steel case, and when the positive and negative plates sink, the positive plate will not contact the bottom of the steel case, causing a short circuit of the battery. Its preparation method, and the battery including the pole core

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