JPS6033566Y2 - alkaline battery - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in the gas discharge mechanism of an alkaline battery.

Conventionally, various gas evacuation mechanisms for this type of battery have been proposed using leaf springs, valve devices, gas permeable gaskets, etc., but all of them have complex structures and the amount of gas emitted is limited. Problems such as not being able to sufficiently follow the gas flow and leakage of the electrolyte as the gas is discharged have not been sufficiently improved, and the results have not been fully satisfactory.

An object of the present invention is to provide a cylindrical alkaline battery having a simple structure, which allows easy gas discharge, and which has a gas discharge mechanism that prevents leakage of electrolyte.

Embodiments of the present invention will be described below with reference to the drawings.

In the cylindrical alkaline manganese battery shown in FIG.
A separator 3 impregnated with an alkaline electrolyte, a cathode 4 made of a mixture of zinc powder and an alkaline electrolyte are housed inside, and the opening of the anode can 1 is filled with a flexible gasket 5 made of polyethylene and a current collector. It is sealed with a cathode terminal plate 7 with a terminal 6 fixed in the center.

Further, an anode terminal plate 8 is placed on the closed top surface of the anode can 1 .

As shown in FIG. 2, the outer periphery of the anode can 1 is covered with a synthetic resin tube 10 made of a heat-shrinkable vinyl chloride tube provided with a plurality of minute notches 9 by heat-shrinking it inward. The upper end of the tube 10 is curled inward to cover the periphery of the anode terminal plate 8, and the lower end is curled inward to cover the periphery of the cathode terminal plate 7.

Further, on the outer periphery of the anode terminal plate 8, an insulating ring 11, which is slightly larger than the insulating ring 11, is placed on the tip of a resin tube 10, and is tightened with the upper end of an exterior cylinder 12 that covers the outside of the tube 10.

On the other hand, the lower end of the resin tube 10 covers the peripheral edge of the cathode terminal plate 7 and is tightened inwardly along the peripheral edge of the gasket 5 together with the lower end of the outer cylinder 12.

The present invention seals the opening of the anode can 1 containing the power generation element with the gasket 5, places the anode terminal plate 10 on the top of the blockage, and connects the anode can 1 with a plurality of microscopic particles. The upper end of the resin tube 10 provided with the cutout hole 9 is bent inward to cover the outer periphery of the anode terminal plate 8 , while the lower end of the resin tube 10 covers the periphery of the cathode terminal plate 7 and also covers the outer periphery of the gasket 5 . It has a structure that also fits closely to the periphery.

Therefore, when the internal pressure of the battery increases due to battery storage or use, the gasket 5 is compressed by the internal pressure, creating a minute gap at the joint between the opening edge of the anode can 1 and the gasket 5, and the gas passes through this gap. Exit the anode can 1.

Since the gasket 5 and the resin tube 10 are made of flexible materials, their joint surfaces are in airtight contact with each other, and the gas coming out of the anode can 1 is trapped between the outer surface of the can 1 and the resin tube 10. The liquid is then discharged from the resin tube 10 through a plurality of notch holes 9 provided in the resin tube 10, and is further discharged to the outside from the joint of the outer cylinder 12.

When the gasket is compressed by the increased internal pressure of the battery, the gas exits the anode can and is easily released through the joints of the outer cylinder through the multiple notched holes in the resin tube. This allows the exhaust to closely follow the gas generation, and the structure is simple, and since the pressure inside the battery is high, the electrolyte is sprayed and becomes a mist when gas is released.

However, when it passes between the outer surface of the anode can and the tube and comes out of the notch, it becomes normal pressure and becomes liquid, but because there is a distance to reach the sealing part, that is, the outside of the anode terminal plate and cathode terminal plate, it becomes liquid. It adheres to the anode can and resin tube and does not leak to the outside of the battery.

. As described above, the present invention provides a battery that has a simple structure and can easily discharge only gas to the outside without causing the electrolyte to scatter outside the battery.

[Brief explanation of the drawing]

FIG. 1 is a half-cut side view of a cylindrical alkaline manganese battery according to an embodiment of the present invention, and FIG. 2 is a perspective view of a synthetic resin tube used in the battery. 1...Anode can, 5...Gasket, 8
...Anode terminal plate, 9...Minute notch hole,
10...Synthetic resin tube.

Claims (1)

[Scope of utility model registration request] Heat-shrinkable composite material with multiple holes drilled around the outer periphery of the anode can, which contains the power generation element, seals the opening with a gasket and cathode terminal plate, and places the anode terminal plate on the closed top. The alkali tube is covered with a resin tube, the end of the tube is extended over the peripheral edge of the anode and cathode terminal plate, and the gasket, the end of the tube, and the end of each terminal plate are tightened with an anode can and an exterior cylinder. battery.