A kind of button battery and manufacturing method

Abstract

The invention provides a button battery and a manufacturing method. The button battery includes an encapsulation shell, a cell assembly, a separator and a guide member; the encapsulation shell has a shell cavity, and the cell assembly is encapsulated in the shell cavity of the encapsulation shell. The battery core assembly includes a positive electrode sheet, a negative electrode sheet and a diaphragm member, and the positive electrode sheet, the diaphragm member and the negative electrode sheet are wound into a cylindrical battery core structure in a stacked winding manner; the separator is arranged on the outer peripheral wall of the cylindrical battery core structure, so that the The outer peripheral wall of the cylindrical cell structure and the outer peripheral wall of the shell cavity are not in contact with each other; two guide members are respectively arranged at the tail ends of the positive electrode sheet and the negative electrode sheet, and the guiding member has an access section and a lead-out section, wherein the lead-out section is vertical. It is bent to one end face of the cell assembly, and a contact portion is formed at the position where the lead-out section contacts the insulator. When the outer drum of the insulator occurs, the abutment portion is squeezed to break the guide member. The button battery in the present invention has the advantages of small volume, thin thickness, large capacity and high safety performance.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a button battery and a manufacturing method. Background technique [0002] With the development of science and technology, the energy crisis has become increasingly prominent. Lithium battery is a new type of energy storage energy. As a new type of green energy storage component, it has the advantages of green environmental protection, high energy density, long service life and wide application. . [0003] The shell material of the rechargeable lithium-ion button battery currently used in the market is generally nickel-plated steel shell, and the specifications and models are standard sizes. Mechanically squeezed together to form a rechargeable lithium-ion battery with positive and negative circuits. [0004] For example, Chinese patent application CN201611086886.1 discloses a new type of wound button battery. The battery case includes a lower case and an upper ca...

AI Technical Summary

Problems solved by technology

[0006] With the wide application of wearable devices, there are more and more requirements for small lithium batteries. Most of the built-in power supplies of wearable devices are rechargeable button lithium batteries, but the existing button battery shells are wrapped in steel shells. The packaging requirements of the battery are very high, and the lead welding of the battery is easy to weld through the shell, causing liquid leakage, and the steel shell material is not corrosion-resistant to the electrolysis of the lithium battery, and the solder joints will be corroded and fall off, causing the battery to fail, and the battery is prone to leakage. Liquid or burst, seriously affecting personal safety

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