A kind of production method of the button battery that reduces false soldering rate and button battery made

Abstract

The invention provides a button battery production method and the button battery produced by reducing the false soldering rate. The button battery production method includes the following steps: first pressing the tab with the same polarity as that of the bottom case against the inner surface of the bottom case Afterwards, the lug is welded on the inner surface of the bottom case, and a first welding spot is formed between the tab and the bottom case, and the first welding point is located on the bottom case outside the vertical projection area of ​​the axial cavity of the battery core on the inner bottom surface; then, put the battery cell into the bottom case; then, set the top case cover on the top of the bottom case, and the upper and lower openings of the top case and the bottom case are oppositely buckled to form a cylindrical button battery shell to accommodate the cell Inside, the tab with the same polarity as the top case is electrically connected to the top case. The use of the production method makes it easy to detect the welding strength between the tab and the corresponding pole shell, thereby reducing the false welding rate of the button battery and finally reducing the product defective rate.

Description

technical field [0001] The invention relates to a production method of a button battery which reduces the false soldering rate and the button battery produced. Background technique [0002] Button cell (button cell), also known as button cell, refers to a battery that looks like a small button. Generally speaking, it has a larger diameter and a thinner thickness (compared to cylindrical batteries such as No. 5 AA batteries on the market), Button batteries are classified from the shape, and the corresponding battery classifications include cylindrical batteries, square batteries, special-shaped batteries, etc. [0003] Button batteries include laminated and wound ones. The basic structure of the wound button battery is: including the first pole shell, the second pole shell, the insulating sealing ring and the battery core, the first pole shell and the second pole shell are oppositely buckled to form a cylindrical button battery shell; There is a gap between the first pole s...

AI Technical Summary

Problems solved by technology

Since there is a risk of virtual welding in both resistance welding and laser welding, and the welding operation between the first output conductor and the first pole shell in the prior art is carried out after the electric core is loaded into the first pole shell, it cannot The welding strength is detected in time, which leads to a high defect rate of button batteries; in addition, in the prior art, the first output conductor usually extends to the axial cavity area of ​​the battery core, and in this area is connected to the first pole The shells are welded and fixed to realize electrical connection. However, since the cell will expand radially after absorbing the electrolyte, the expansion of the cell will drive the first output conductor to move radially, which will easily lead to the breakage of the solder joint and the first output conductor from The first pole shell falls off, and the welding spot position of the first output conductor is usually a conductive area. Risk of short circuit due to pole piece contact

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