Manufacturing process for cylinder battery

Abstract

The invention relates to a manufacturing process for a battery, mainly relates to a manufacturing process for a cylinder battery, and belongs to the lithium battery manufacturing field. The manufacturing process for the cylinder battery successively comprises the following steps of a manufacturing process of a battery rolling needle, a battery winding process, a battery pre-charging process and a battery sealing process, wherein the manufacturing process of the battery rolling needle comprises the steps of firstly welding the rolling needle onto a positive polar plate or a negative polar plate; and then cascading a circular insulating plate having the same diameter with the inner diameter of the battery on the upper end of the rolling needle at a position without welding the positive polar plate or the negative polar plate. The rolling needle passes through the circular insulating plate; and passed through part of the rolling needle is led out to the outer surface of the battery to form a positive terminal or a negative terminal of the battery. The manufacturing process for the cylinder battery is simple and reliable in process and low in cost, and has good battery sealing properties.

Description

technical field [0001] The invention relates to a battery manufacturing process, mainly relates to a cylindrical battery manufacturing process, and belongs to the field of lithium battery manufacturing. Background technique [0002] [0003] In the manufacturing process of lithium-ion batteries, the method of positioning the diaphragm first and then positioning the positive and negative plates is generally used for winding, but the batteries prepared by this process are prone to produce gaps between the diaphragm and the positive and negative plates, which is easy Cause the outflow of the electrolyte, resulting in insufficient charging; at present, some researchers have begun to pay attention to this phenomenon, such as the Chinese patent with the publication number CN1992414A (2007-07-04) to avoid the generation of gaps by adding clamping components, but this method requires Additional parts required for winding are added, and the way of putting in the positive and neg...

AI Technical Summary

Problems solved by technology

[0003] In the manufacturing process of lithium-ion batteries, the method of positioning the diaphragm first and then positioning the positive and negative plates is generally used for winding, but the batteries prepared by this process are prone to produce gaps between the diaphragm and the positive and negative plates, which is easy Cause the outflow of the electrolyte, resulting in insufficient charging; at present, some researchers have begun to pay attention to this phenomenon, such as the Chinese patent with the publication number CN1992414A (2007-07-04) to avoid the generation of gaps by adding clamping components, but this method requires Additional parts required for winding are added, and the way of putting in the positive and negative plates and separators is not described in detail; in addition, after the battery is wound, the winding needle used for winding the battery is usually pulled out, such as the publication number CN101188308A (2008-05-28) The Chinese patent uses a multi-layer winding method for the production of cylindrical batteries. After the production, the winding needle needs to be pulled out, which not only causes waste of raw materials, but also makes the process complicated; finally, in the battery production process , is very important to the sealing of the battery. At present, the method of directly pouring the sealant is used, but when the battery is used for a long time, the sealing effect of this method is not very good; other battery sealing methods are made by complicated machines. Not only the process is complicated but also the cost is high

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