A battery winding device

Abstract

The invention discloses a battery winding device, which includes a winding body and a positioning piece arranged on the winding body, the winding body has a transmission part for connecting with an external driving device, and the winding body The main body includes a base body and a number of winding pieces that can be swingably arranged on the base body. The positioning piece is used to limit the swing of each winding piece relative to the base body. Each winding piece surrounds the base body and forms a cylinder together. shaped reel, the central axis of the reel coincides with the central axis of rotation of the transmission part; the positioning member can be detached from the winding main body or move relative to the winding main body to release the winding sheet At this time, each winding piece can swing towards the base. When the invention is in use, it is convenient to maintain the stability of the tension of the electric core and the unloading operation of the electric core coil, effectively improve the product quality, reduce the defective rate, and is convenient to use.

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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