Soft package lithium ion cell packaging method

Abstract

A soft package lithium ion battery cell packaging method belongs to the technical field of battery cell packaging, and comprises the following steps: 1) measuring the size of a bare battery cell, and cutting an aluminum plastic film meeting the size requirement according to the size of the bare battery cell and the size reserved for packaging; 2) drawing a broken line graph of the aluminum plastic film on the drawing template, and punching at the intersection point of the broken line graph; (3) placing the drawing template on the cut aluminum plastic film, drawing points along the holes in the drawing template, manually forming folding marks in the point drawing positions on the aluminum plastic film, and then trimming; and 4) putting the bare battery cell into the aluminum plastic film with a folded pit, and carrying out hot-pressing packaging and liquid leakage test. The method has the beneficial effects that a manual pit making method is used for replacing a customized mold pit punching method or a direct packaging method, the method is suitable for packaging the soft package lithium ion battery cells of various sizes, new mold redevelopment is avoided, the production cycle is shortened, the manufacturing cost is reduced, the packaging effect is improved, and the liquid leakage risk is reduced.

Description

technical field [0001] The invention relates to the technical field of electric core packaging, in particular to a soft-pack lithium ion electric core packaging method. Background technique [0002] As a green battery, lithium-ion batteries have the advantages of high energy density, high working voltage, high safety performance and long service life, which has led to more and more electronic products tending to use lithium-ion batteries. Lithium-ion battery is a secondary battery that can be repeatedly charged and discharged. It is composed of cathode and anode plates, separator, electrolyte, mechanical parts and other main components. [0003] For soft-pack lithium-ion batteries, packaging is one of the key technologies in the manufacturing process, and the quality of the packaging directly affects the success or failure of the battery. Due to the differences in the size of various electronic products, the requirements for the size of lithium-ion batteries are also differ...

AI Technical Summary

Problems solved by technology

In the early stage of soft-pack lithium-ion product development, when it is used for bidding, it is required that the cell development speed is fast and the performance meets customer needs, but the quantity is small. Severe wrinkling and high risk of leakage

For mass-produced soft-packed batteries, the outer packaging film of the battery cell, that is, the aluminum-plastic film, is generally punched into the mold before packaging, which can ensure the heat-sealing effect at the opening, but it takes half a month to open the mold, and The cost of customizing a set of molds is about 10,000 yuan

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