Button cell and manufacturing method thereof

Abstract

The invention provides a button cell and a manufacturing method thereof. The button cell comprises a package assembly and a battery roll core. In the actual application process, a battery cup and a battery cover play a protection role; a seal rubber ring plays a sealing and waterproofing function; besides, when a tab needs to be welded, the tab is positioned, and electric resistance welding operation is carried out on the battery cup and/ or the battery cover, so that the electric resistance welding is carried out on the contact portion between the tab in the center position of the battery roll core and the battery cup and/ or the battery cover to form a center welding layer, and the electric resistance welding is carried out on the contact portion between the tab at the edge position of the battery roll core and the battery cup and/ or the battery cover to form an edge welding layer; the center welding layer and the edge welding layer can prevent the phenomenon of "explosion welding"occurred in the tabs, thereby greatly improving welding stability of the tabs; and compared with a conventional laser welding mode, the provided welding mode is higher in welding safety factor, and there is no risk that the laser directly breaks down the battery cup or the battery cover.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a button battery and a manufacturing method thereof. Background technique [0002] At present, a battery refers to a cup, tank or other container or part of a composite container that contains an electrolyte solution and a metal electrode to generate an electric current, and is a device that can convert chemical energy into electrical energy. It has positive pole and negative pole. As technology advances, batteries generally refer to small devices that generate electricity, such as solar cells. The performance parameters of the battery mainly include electromotive force, capacity, specific energy and resistance. Using the battery as the energy source can obtain stable voltage, stable current, stable power supply for a long time, and a current that is little affected by the outside world, and the battery structure is simple, easy to carry, easy to charge and discharge, and is ...

AI Technical Summary

Problems solved by technology

First, the welding method of laser welding uses the single-point welding method. Before the formal laser welding, the position of the tab of the battery core needs to be positioned. If the position of the tab is not positioned accurately, the tab will "explode". Welding” phenomenon, that is, the tabs are not welded to the battery cover or battery case in a real sense, and the connection stability is poor; sec

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