Button cell negative electrode top and negative electrode combination, and alkali button cell

Abstract

The invention discloses an alkali button cell and a negative electrode combination. The alkali button cell comprises a positive electrode cup, a negative electrode top, an annular sealing ring, a positive electrode cake, a diaphragm and zinc paste, wherein the positive electrode cup and the negative electrode top are insulated through the annular sealing ring; the positive electrode cake and the zinc plate are isolated through the diaphragm; the negative electrode top comprises an integrally-formed central region, and an annular bending part on the periphery of the central region; the annular bending part comprises an annular inner wall, an annular outer wall and an annular connecting part between the annular inner wall and the annular outer wall; the lower end plane of the annular connecting part is an annular plane which is 0.2-0.4mm in width; and the lower end plane of the annular connecting part is immersed with glue and then fixed with the annular sealing ring through gluing. The alkali button cell has the advantages as follows: the lower end plane of the annular connecting part of the negative electrode top is the annular plane which is 0.2-0.4mm in width; and by designing the circular-arc-shaped lower end of the negative electrode top into the planar shape, when the lower end plane of the negative electrode top is immersed with glue, the planar-shaped contact part can be glued with more glue, so that the gluing effect between the negative electrode top and the sealing ring can be better.

Description

technical field [0001] The invention relates to the field of button batteries, in particular to a button battery negative pole top and negative electrode combination and an alkaline button battery. Background technique [0002] In the era of mercury-containing primary zinc-manganese button batteries, the top and bottom of the negative electrode can play a good leak-proof performance without printing glue. Because mercury is a good corrosion inhibitor, it can effectively absorb the gas generated inside the battery, so that the battery will not produce gas swelling and leakage. However, mercury is a heavy metal that is harmful to the environment. The national environmental protection order prohibits domestic sales or production of mercury-containing batteries. Since then, the production of alkaline manganese batteries has entered a mercury-free era. [0003] The production of mercury-free batteries is a big test for the battery's leak-proof performance. The alkaline button b...

AI Technical Summary

Problems solved by technology

Since the lower end of the negative pole top is arc-shaped, the amount of glue left on the arc portion of the negative pole top due to quick dipping is insufficient, which will affect the sealing effect between the negative pole top and the sealing ring, and the leak-proof effect is not good; at the same time, the negative pole top There is zinc powder inside, and a large amount of glue cannot be manually injected, otherwise it will contaminate the zinc powder and affect the electrical performance of the button battery

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