Battery cell winding equipment and preparation method of battery cell

Abstract

The invention relates to battery cell winding equipment and a preparation method of a battery cell. A diaphragm discharging device of the battery cell winding equipment is used for outputting a first diaphragm, a second diaphragm, a third diaphragm and a fourth diaphragm respectively; a negative electrode discharging device is used for outputting a first negative electrode plate and a second negative electrode plate; a positive electrode discharging device is used for outputting a first positive electrode plate and a second positive electrode plate; a first compounding device is arranged at the downstream of the diaphragm discharging device, the negative electrode discharging device and the positive electrode discharging device; the first compounding device is used for compounding and connecting the first diaphragm, the first negative electrode plate, the second diaphragm and the first positive electrode plate to form a first compound plate body; a second compounding device is arranged at the downstream of the diaphragm discharging device, the negative electrode discharging device and the positive electrode discharging device, and is used for compounding and connecting the third diaphragm, the second negative electrode plate, the fourth diaphragm and the second positive electrode plate to manufacture a second composite plate body; and a winding device is used for winding the first composite plate body and the second composite plate body to manufacture a battery cell.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery production, in particular to a battery winding device and a battery manufacturing method. Background technique [0002] With the continuous development of science and technology, new energy vehicles are more and more widely used as an environmentally friendly means of transportation. The power source of new energy vehicles is mainly power batteries. In the power battery processing equipment, the electric core of the power battery is formed by winding the winding machine, making the winding machine an important equipment for the production of power batteries. [0003] However, during the preparation of lithium batteries in the related art, the winding machine basically uses the positive electrode sheet, the separator, the negative electrode sheet, and the separator to be wound on the winding needle at the same time, that is, the cell winding consists of 4 belt paths (respectively, the ...

AI Technical Summary

Problems solved by technology

The needle of this type of winding machine can only increase the material per turn, which limits the improvement of the working efficiency of the winding machine

In addition, during the production process of the winding machine, problems such as pole piece discount and winding dust are more likely to occur, which in turn affects the yield rate and production efficiency of the electrode assembly

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