A flexible lithium-ion battery

Abstract

The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a flexible lithium-ion battery with low production cost and high utilization rate of cathode materials, comprising an anode strip with a width of 2-20mm, a cathode strip with a width of 1-19mm, The electrode assembly, the packaging bag and the cell support composed of a diaphragm arranged between the anode belt and the cathode belt, the electrode assembly is spirally wound on the battery support, and the battery support and the electrode assembly are arranged in the packaging bag, the anode belt An anode lug is welded on the top, a cathode lug is welded on the cathode strip, and the battery pillar is set as a cylindrical body with an insulated surface and a bendable surface. Compared with the prior art, the anode active material layer and the cathode active material layer of the present invention are respectively arranged on the anode and cathode current collectors by simple coating, thereby simplifying the process and reducing production costs; and the cathode active material layer All have a corresponding anode active material layer, thereby improving the utilization rate of the cathode active material.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a flexible lithium ion battery with low production cost and high utilization rate of cathode materials. Background technique [0002] Wearable electronic devices attract the attention of users with their fashion and novelty. Commodities such as smart glasses, smart rings, smart wristbands and smart watches have gradually become one of the focuses of people's attention. These electronic products have different shapes, and they also have different requirements for the shape of lithium-ion batteries, but their common requirements for lithium-ion batteries are small volume and a certain amount of deformation. In this context, flexible linear batteries have become the first choice for wearable electronic devices due to their flexibility and the ability to combine shapes according to product requirements. [0003] LG reported a cable-type battery not long ago...

AI Technical Summary

Problems solved by technology

[0005] One is that the Ni-Sn alloy is placed on the copper wire by sputtering, and the sputtering process is relatively complicated and requires special expensive equipment, so the production cost is high;

[0006] The second is that the metal aluminum wire is used as the cathode current collector, and there is a gap between the helically wound copper wire and the aluminum wire. Part of the cathode material coated on the aluminum wire has no anode active substance corresponding to it, resulting in waste of cathode materials, resulting in Cathode material utilization is low