Button type lithium ion battery adopting grouting process and preparation method of button type lithium ion battery

Abstract

The invention discloses a button type lithium ion battery adopting a grouting process and a preparation method of the button type lithium ion battery. The button type lithium ion battery comprises a positive electrode upper cover, a negative electrode lower cover, an insulating spacer bush, a diaphragm, electrolyte, positive electrode slurry and negative electrode slurry. the process of coating and stacking welding electrode ears is abandoned, a positive electrode material and a negative electrode material are directly and correspondingly bonded together with the positive electrode upper cover and the negative electrode lower cover, and traditional pole piece and tab materials are omitted, so product material cost is reduced, the technological process is effectively simplified, the manufacturing automation degree is improved, and manufacturing cost is reduced; meanwhile, the risk of short-circuit fire caused by the fact that a traditional tab and a traditional pole piece pierce a diaphragm is avoided, and safety performance of the battery is improved; in addition, the internal space of the battery is not occupied by the traditional pole piece and pole lug, so energy density of unit volume of the battery is greatly improved. By applying the technology, production efficiency can be improved, product safety is improved, product performance is improved, cost is lower, and comprehensive competitiveness of the product is improved.

Description

technical field [0001] The invention belongs to the technical field of button batteries, and in particular relates to a button lithium ion battery with a grouting process and a preparation method thereof. Background technique [0002] The shape, appearance and size of button batteries are similar to buttons, also known as button batteries. They have the characteristics of large diameter and thin thickness, and are often used as power sources for various electronic products. There are many types of button batteries. According to the materials used, they can be divided into silver oxide batteries, lithium batteries, alkaline manganese batteries, etc. Among them, button lithium batteries have the advantages of high capacity, long cycle life, low cost and environmental protection. widely used. [0003] The cell assembly methods of the existing button-type lithium battery include laminated type and winding type. However, whether it is a laminated or wound battery, it is usually...

AI Technical Summary

Problems solved by technology

This existing method is a waste of time in the manufacturing process, and the production efficiency is low; and because the tabs and pole pieces are made of metal materials, they are easy to pierce the diaphragm when wrapped together, causing short circuit and fire; in addition, the tabs and pole pieces are inside the shell Occupies a lot of effective space, resulting in a loss of energy density per unit volume, and also increases material costs

Images