JPS5831329Y2 - Button alkaline battery - Google Patents

Description

[Detailed description of the invention] This invention relates to improvements in button-type alkaline batteries such as silver oxide batteries and mercury oxide batteries, and provides a battery with stable performance.

Conventionally, as shown in FIG. 2, this type of battery has an anode 22 integrally fitted with a metal hard ring 21 having an angular cross section from the side to the top, which is inserted into the bottom of the can of the anode wire 23.
2, a microporous film 24, a semipermeable membrane 25, and a liquid-absorbing paper 26 are placed on top of the
are placed one after another, and the opening of the anode wire 23 is sealed with a cathode terminal plate 29 filled with a cathode agent 28 made of a mixture of zinc powder and an alkaline electrolyte through a gasket 27 having an angular cross-section. It has become.

If the tightening force of the anode wire 23 is applied directly to the anode 22, the area around it may crack, so the hard ring 21 stops the tightening force of the anode wire 23.

However, when the hard ring 21 is integrally molded with the anode 22, the height of the hard ring 21 is designed in advance to be slightly shorter than that of the anode 22 in order to prevent the mold from being worn out by the hard ring 21. Therefore, when assembling the battery, cracks occur from the side surface of the anode 22 not covered by the hard ring 21 to the bottom surface, and the lower peripheral edge of the anode 22 is chipped, resulting in poor contact between the anode 22 and the anode wire 23.

This invention eliminates the above-mentioned drawbacks, and will be explained below using FIG. 1.

When making a disc-shaped anode 1 by pressure-molding fine powder mainly composed of an anode active material such as silver oxide or mercury oxide, a hard metal ring 2 with a cross-section shaped like an ellipse is formed from the side to the bottom of the anode 1. be installed in one piece.

This anode 1 is inserted into the bottom of the can of the anode wire 3, and furthermore, a microporous film 4 made of polypropylene, a semipermeable membrane 5 made of cellophane, and a liquid-absorbing paper 6 made of vinylon-rayon mixed paper.
are sequentially placed on the absorbent paper 6, and then a buffer ring 7 made of synthetic rubber, foamed synthetic resin, or the like is inserted onto the absorbent paper 6.

The opening of the anode wire 3 is connected through a gasket 8 having an angular cross section.
It is sealed with a cathode terminal plate 10 filled with a cathode agent 9 made of a mixture of zinc powder and an alkaline electrolyte.

The buffer ring 7 is for preventing the tightening force of the anode wire 3 from being applied directly to the anode 1.

This device has the above-mentioned configuration, with a hard metal ring 2 having a cross-section extending from the side to the bottom of the anode 1.
Since the anode wire 3 is attached integrally, the anode wire 3 is attached when assembling the battery.
No cracks or chips occur on the lower surface periphery of the anode 1 that comes into contact with the bottom of the can, and the contact between the anode 1 and the anode wire 3 is good, resulting in stable battery performance.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a button-type alkaline battery according to this invention, and FIG. 2 is a cross-sectional view of a conventional button-type alkaline battery. 1...Anode, 2...Hard ring, 3.
·····anode.

Claims (1)

[Scope of utility model registration request] In a button-type alkaline battery in which an anode 1, which is formed by pressure-molding fine powder mainly consisting of an anode active material, is inserted into the bottom of a can of an anode wire 3, there is a hard metal plate with a cross section extending from the side to the bottom of the anode 1. A button-type alkaline battery characterized by having a ring 2 attached integrally.