KR810000048Y1 - Galvanic cell having a resealable vent closure - Google Patents

Abstract

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Description

Galvanic cell with reclosable pore seal

1 is a front cross-sectional view of some assembled batteries showing that the cathode mixture and the cathode collector rods are within the containered cathode.

FIG. 2 is similar to some of the assembled cells of FIG. 1, but in addition the elastic sponge gasket slightly enters the cathode collector rod and lies at the edge of the container.

FIG. 3 is similar to FIG. 2, but further showing that the cover is located in the container, wherein the perimeter of the elastic sponge gasket is adapted to be compressed between the vertical edge of the outer cover of the cover and the inner top wall of the container.

4 is a front cross-sectional view of a fully assembled battery sphere of the present invention without a jacket or label.

5 is a front cross-sectional view of a partially assembled battery showing another embodiment of the present invention.

6 is a front sectional view of a fully assembled battery of the type shown in FIG.

7 is a front sectional view of a carver-gasket assembly used in the present invention.

FIG. 8 is a front sectional view of a fully assembled battery embodiment of the present invention using the carver-gasket assembly of FIG.

9 is a front cross-sectional view of another carver-gasket assembly used in the present invention.

FIG. 10 is a front sectional view of a fully assembled battery embodiment of the present invention using the carver-gasket assembly of FIG.

The present invention relates to a sealed galvanic battery crab, and more particularly to a low pressure resealable pore for releasing excessive gas pressure from inside the battery.

Galvanic cells sometimes generate large quantities of gas under certain conditions during use. Since these cells must be tightly sealed at all times to prevent leakage of electrolytes, high internal gas pressures can occur. Such internal pressure may cause leakage of electrolyte, swelling or rupture of battery if proper pore is not made. If a pore valve is used, the valve must be resealable to prevent the electrolyte from drying out over the life of the cell and to prevent oxygen from entering the atmosphere that causes corrosion of the anode.

Although several resealable pressure release pore valves have been developed in the past, an important problem with them is that they are difficult to couple to the cell assembly. Moreover, these pressure relief pore valves are expensive to manufacture and are inadequate for most small batteries. Some of the resealed pores of the prior art exemplified in the existing patents are also unsuitable for low pressure release.

It is therefore an important object of the present invention to provide a compact yet economical low pressure resealable pore for use in galvanic batteries, and also a minimum number of parts required, and therefore resealable for galvanic batteries that are easy to assemble and inexpensive to manufacture. To provide a pore.

In addition, the object of the present invention is to provide resealable pores that can be applied to the diameter of the various sizes of the protruding battery container, to provide a flexible sponge gasket as an activation device of the pore closure device for galvanic batteries, low pressure An improvement is to make a galvanic cell with a solvent sealable pore closure, wherein an elastic sponge gasket, which is gas impermeable and can be elastically compressed, is compressed between the top wall of the vessel and the cover.

If the present invention will be described in more detail with reference to the accompanying drawings, but the drawings are an embodiment of the embodiment according to the present invention is not limited thereto.

Referring to Figure 1 in detail, some assembled galvanic batteries have a cylindrical container (2), which is made of an electrochemically consuming metal such as zinc and serves as the anode of the cell. Within the cell container 2 there is a mass of cathode depolarizer mixture 4 comprising, for example, manganese dioxide and carbon black as a conductive material and an electrolyte. The cathode depolarizer mixture 4 can be molded around a central cathode collector rod, or the cathode depolarizer mixture is contained in the container 2 as a wet mixture containing substantially all of the electrolyte of the cell. The cathode collector rod 6 may then be pushed into the center of the depolarizer mixture 4. The cathode collector rod 6 may be a carbon rod impregnated with wax or organic resin in order to make it liquid and gas impermeable. Whether the depolarizing agent mixture is molded into a bobbin-like structure in a separate process prior to cell assembly, or directly enters into the container 2 and solidifies therein, the cathode collector rod 6 has its end at the container 2 It is inserted into the depolarizer mixture 4 to protrude out of its open end. Isolation (8) surrounds the cathode depressant mixture (4) and separates it from the inner wall of the container (2) while the bottom cup separator (10) causes the depressant mixture (4) to bottom the container (2). Separate from the inner surface. The separator will be a thin thin separator, for example a thin bibulous paper coated with paste. The upper part of the separator plate 8 is folded over the depolarizing agent mixture 4 to form a space 12 to accommodate liquid jets which may occur when the battery is discharged.

FIG. 2 shows an elastic sponge annular gasket 14 in addition to the numbered parts as in FIG. 1, with a hole 16 in the center thereof and a collector rod 6 penetrated through the hole 16. It is disposed on the container 2. Since the annular gasket 14 is made of a resilient material, the diameter of the hole 16 may be smaller than the diameter of the cathode collector rod 6, so that the gasket 14 is tightly fastened to the rod 6.

3 shows a plastic closure or cover 18 formed in the center with an electrode terminal cap 20 in addition to the numbered parts as in FIG. The cover 18 should be rigid and usually made of plastic. As shown in FIG. 3, the cover sidewall 22 is slightly inclined, and a circular hole 24 defined by a portion of the inner wall 26 of the cover 18 and the inner surface 27 of the terminal cap 20 is formed. have. When assembling the cover-cap members 18-20 into the cell, the cover-cap members 18-20 are first arranged in line with the holes 24 on the rod 6 and then the members. (18)-(20) are pressed over the elastic sponge gasket 14, thereby inserting the gasket 14 and the members 18-20 into the container 2. The gasket 14 is pressed between the sidewall 22 of the cover and the inner top wall 28 of the container 2 while inserting the members 18-20 into the container 2. In particular, the peripheral portion 30 of the gasket 14 is pressed between the inner top wall 28 of the container 2 and the side wall 22 of the carver. Occasionally, the carver sidewall 22, the top and bottom surfaces of the periphery 30, and the inner wall 28 of the container 2 are assembled to the pore seal to assist pore sealing of the carver-gasket interface and the gasket container interface. You can also apply a thin film of grease.

FIG. 4 shows the top of container 2 in addition to the same numbered parts of FIG. 3 being bent and pressed into gasket 14 to form a fully assembled battery except for the jacket or label.

The size of the cover 18, the gasket 14 and the container 2 will determine the degree of pressure on the gasket 14, and those skilled in battery technology will prevent leakage and avoid sealing too tightly. You will be able to choose the appropriate dimensions. By properly selecting the dimensions of the cell's components, when the internal pressure reaches a predetermined level, the gasket will be squeezed sufficiently to ensure the release of internal gas between the gasket container and the gasket-carver interface and the pressure should be below this size. When dropped, the gasket automatically reverts back to the original compressed size and reseals the cell. Compression of the gasket or pressure at which the gas is released will be determined. In most cases, the gasket is compressed to release gas at a pressure in the range of 5-75 psi.

5 illustrates another embodiment of a battery according to the present invention. 5 shows a partially assembled battery comprising a cylindrical conductive container 50 such as, for example, a zinc container, inside which is a mass of cathode depolarizer mixture 52. At the center of the depolarizer mixture 52 is a cathode collector rod 56 which protrudes through the open end of the cylindrical container 50. A thin separator 54 surrounds the cathode sorbent mixture 52 and isolates the sorbent mixture 52 from the inner wall of the conductive vessel 05, and the bottom cup separator 58 is made of the stimulant ring. The compound 52 is isolated from the inner bottom surface of the container.

The top of the vessel 50 is bent inward to give a support flange with an edge 60 inward, and an elastic sponge annular gasket 64 with a hole 66 in the center lies on the flange of the vessel 50, with the collector The rod 56 protrudes through the hole 66. Since the annular gasket 60 is made of a resilient material, the diameter of the aperture 66 can be smaller than the diameter of the cathode collector rod 56 so that the gasket 64 is tight on the cathode collector rod 56. . The interface 60 of the rod 56 and the gasket 64 thus provides a good low pressure resealable discharge passage for the gas from inside the cell. A thin thin film grease may be applied to the top of the collector rod 56 and the inner wall of the hole 66 in the gasket 64 prior to assembly to aid in pore-closure of the gasket-collector rod surface.

The cell (before completion) with the gasket 64 placed on the upper edge flange disposed inwardly of the container 50 is packaged in an outer final assembly, which is tubular made of fibrous material such as kraft paper. Has a non-corrosive jacket (68). The upper end of the tubular jacket 68 extends over the gasket 64 and bends over the peripheral edge of the annular metal cover plate 70 to be framed. Prior to joining the jacket 68 to the carver plate 70, a metal electrode terminal cap 72 is placed on the cathode collector rod 56 and an outwardly flanged lower end 71 is mounted on the gasket 64. Lies. The outer peripheral edge of the metal bottom disk 76 is in electrical contact with the bottom surface 78 of the conductive container 50 and is secured in engagement with the lower end of the tubular jacket 68. The bottom disk 76 acts as one of the electrode terminals of the battery.

FIG. 6 shows that in addition to the numbered parts as in FIG. 5, a gasket 64 is pressed between the upper cover plate 70 and the upper edge of the container 50. In particular, in completing the assembly of the battery shown in FIG. 5, the terminal cap 72 is pressed into the battery, and further, the inner collector portion 80 of the cathode collector rod 56 and the gasket 64 is moved into the battery. Insert it. It should be noted that the portion 80 of the gasket 64 is slightly twisted during this process. During the final fixation of the cover plate 70 to the jacket 68, the cover plate 70 presses the gasket 64 and thus the gasket between the cover plate 70 and the flange facing the interior of the container 50. Compression 64 is compressed. As such, the elastic sponge gasket 64 is compressed between the container 50 and the cover plate 70 to form a resealable pore seal of the battery, and gas of about 5 PSi or more is released into the atmosphere through the upper bent joint. It allows you to be.

If necessary, to aid in pore closure of the carver-gasket interface and the gasket-vessel interface, the bottom contact surface of the cover plate 70, the top wall of the flange 60 of the container 50 and the gasket prior to assembly. Thin thin film grease may be applied to the top and bottom outer surfaces of tweezers 64, for example. After a predetermined amount of gas pressure has been generated, the gasket 64 is sufficiently compressed to ensure that gas within the cell can be released between the gasket-vessel interface, the gasket-carver interface and the gasket-collector rod interface. It will be understood that it should be.

FIG. 7 shows a carver-gasket assembly 82 in which the electrode terminal cap 86 is formed of a plastic enclosure, ie a cover 84, formed in the center thereof. As shown in FIG. 7, the carver sidewall 88 is slightly inwardly inclined, with a circular hole 90 defined by a portion of the inner wall 92 of the carver 84 and the inner surface 94 of the terminal cap 86. There is this. Under the outer sidewall 88 is a groove 96 into which an annular sponge gasket 98 is fixed. Prior to assembling the gasket 98 to the carver 84, the lower portion 100 of the carver extends down, but the outer diameter of the portion 100 is equal to or smaller than the inner diameter of the gasket 98. . Once the gasket 98 is fitted over the part 100 and touches the wall 102 of the carver 84, the lowest end of the part 100 is bent into the gasket 96 to cover the gasket 98. Fix to (84).

FIG. 8 shows a fully assembled battery (except jacket or label) including the base cell component shown in FIG. 1 and the carver-gasket assembly shown in FIG. 7. All parts are shown in FIGS. It is indicated by the same reference number as the diagram. In particular, the fully assembled cell 104 shown in FIG. 8 aligns the aperture 90 of the carver-gasket assembly 82 with the cathode collector rod 6 and then the assembly 82 inside the container 2. The gasket 98 is then squeezed between the side wall 88 of the carver 84 and the inner top wall of the container 2 in the manner described in FIG. 3. The upper portion of the vessel 2 is then bent inward and clamped into a gasket 98 to produce a fully assembled cell 104 as shown in FIG.

FIG. 9 shows another embodiment of a carver-gasket assembly 106 consisting of a plastic carver 108 with an electrode terminal cap 10 molded in the center. As shown in FIG. 9, the carver-gasket 106 has an outer side wall 112 and a circular shape determined by a portion of the inner wall 116 of the carver 108 and the inner surface 118 of the terminal cap 110. There is a hole 114. At the lower end of the carver 108 there is an annular sponge gasket 120, which has a hole 122 equal to or greater than the hole 114 of the carver 108 so as not to block the hole 114. The upper inner surface 124 of the gasket 120 is secured to the lower surface 126 of the carver 108 in a conventional manner, such as using a suitable adhesive material 125.

FIG. 10 shows a fully assembled battery (except jacket or label) comprising the basic battery component shown in FIG. 1 and the carver-gasket assembly shown in FIG. The fully assembled battery 128 shown in FIG. 10, in particular, aligns the holes 114 of the cover 108 with the cathode collector rod 6 and then the assembly 106 into the container. (2) Assembled by pushing in, where the gasket 120 is squeezed between the side wall 112 of the carver 108 and the inner top wall of the container 2 in the manner described in FIG. Then, the upper portion of the container 2 is bent inward and clamped into the gasket 120 to make a fully assembled battery 128 as shown in FIG.

Claims (1)

A gas-impermeable and elastically compressible elastic sponge gasket 14 is squeezed between the top wall 28 of the container 2 and the cover 18, with a cathode collector rod 6 at the center thereof. This hole 16 to pass through provides a discharge passageway that can be resealed at the interface between the gasket 14 and the cathode collector rod 6, and a portion 80 of the gasket 64 is a container ( 50. A galvanic cell with a resealed pore closure, characterized in that it is squeezed between the upper flange 60 bent into the top and the outer bottom surface of the carver 70.