Winding equipment of lithium ion battery cell and winding method thereof

Abstract

The invention relates to winding equipment of a lithium ion battery cell and a winding method thereof. The winding equipment of the lithium ion battery cell is used for winding a lithium ion battery cell composite sheet into the battery cell and comprises a base, a storage mechanism which is arranged on the base and is used for storing the lithium ion battery cell composite sheet, a material taking mechanism which is movably arranged on the base so as to take out the lithium ion battery cell composite sheet from the material storage mechanism, a guide mechanism which is arranged on the base soas to guide the taken-out lithium ion battery cell composite sheet, and a winding mechanism which is arranged on the base and located in the guide direction of the guide mechanism so as to wind the lithium ion battery cell composite sheet. The guide mechanism comprises a guide groove which is used for placing the lithium ion battery cell composite sheet so as to position and guide the lithium ionbattery cell composite sheet and extends towards the winding mechanism. According to the winding equipment of the lithium ion battery cell, the winding efficiency can be improved, and pole piece deviation and diaphragm deformation in the winding process are avoided, and thus the product percent of pass and the product quality can be improved.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, and more specifically, to a winding device for lithium-ion batteries and a winding method thereof. Background technique [0002] Since the commercialization of lithium-ion batteries in the 1990s, lithium-ion batteries have become one of the main power sources for portable electronic products such as mobile communications and notebook computers due to their high specific energy, high voltage, and high energy density. With the development of various electronic devices, the application of lithium batteries is becoming wider and wider, and the demand for lithium batteries is increasing, which puts forward higher requirements for the production machinery of lithium batteries, especially for smart wearable device batteries, such as TWS Bluetooth headset batteries, sports bracelet batteries, etc., have stricter requirements on product endurance, safety, stability and reliability. The existing bluet...

AI Technical Summary

Problems solved by technology

The existing bluetooth earphone battery core is mainly composed of corresponding two layers of diaphragms and positive and negative electrodes wound by winding needles. When winding, a diaphragm roll is required to be set on the feeding roller, and then the diaphragm and positive and negative electrodes are pulled to the roll. Needle winding, for TWS Bluetooth headset batteries, the battery volume is small, the battery height is generally below 15mm, the pole piece width is only 3-10mm, the winding operation is difficult, the production efficiency is low (5-6ppm), and the process Unstable, the pole piece is prone to offset during the winding process, the diaphragm is deformed by force, etc., the product qualification rate is low and the product quality is difficult to guarantee

In addition, due to the poor alignment of the pole pieces, the pole pieces are easy to shift and spiral, which greatly affects the charge and discharge capacity and safety performance of the battery.

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