Battery cell winding device

Abstract

The invention discloses a battery cell winding device. The battery cell winding device comprises a winding body and a positioning component arranged on the winding body; the winding body includes a transmission part used for being connected with an external driving device; the winding body comprises a base body and a plurality of winding sheets arranged on the base body in a swinging manner; the positioning component is used for limiting the swing of each of the winding sheets relative to the base body; each winding sheet surrounds the base body and forms a cylindrical winding drum together; the central axis of the winding drum coincides with the rotation central axis of the transmission part; and the positioning component can be detached from the winding body or move relative to the winding body until the limit on the winding sheets is released, at this time, each winding sheet can swing toward the base body. According to the battery cell winding device provided by the invention, whenin use, the stability of the tension of a battery cell and the blanking operation of a battery cell roll are convenient to be maintained, the product quality can be effectively improved, the reject ratio is reduced, and the use is convenient.

Description

technical field [0001] The invention relates to the field of battery production equipment, in particular to a battery winding device. Background technique [0002] The battery cell is an important part of the battery. The battery cell is usually in the form of a sheet, which is composed of two separators, a positive electrode layer and a negative electrode. In the production of the battery, the battery cell needs to be wound. Due to the tension of each layer of the battery cell The performance is different, and the tension of the battery core needs to be precisely controlled during winding, otherwise the layers of the battery core are prone to loosening and deformation. The winding devices of existing winding equipment usually use elliptical winding needles and rhombus winding needles. The ratio of the linear speed to the rotating speed varies greatly around the periphery, and it is extremely difficult to maintain the stability of the cell tension by controlling the rotating...

AI Technical Summary

Problems solved by technology

[0002] The battery cell is an important part of the battery. The battery cell is usually in the shape of a sheet, which is composed of two separators, a positive electrode layer and a negative electrode. In the production of the battery, the battery cell needs to be wound. Due to the tension of each layer of the battery cell The performance is different, and the tension of the battery core needs to be precisely controlled during winding, otherwise the layers of the battery core are prone to loose deformation. The winding devices of the existing winding equipment usually use oval needles and diamond needles. The ratio of the linear speed to the rotating speed varies greatly around the periphery, and it is extremely difficult to maintain the stability of the cell tension by controlling the rotating speed of the winding needle. The defective rate of the product is high, which has a great impact on the quality of the product. The battery core will be tightly wrapped on the rolling pin, which is not easy to remove. It is also easy to cause deformation and damage to the battery core during the removal process of the battery core, which will affect the product quality.

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