JP2015170468A - Gas transmission member, inspection method of gas transmission member and breathable container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas transmission member including a plurality of gas transmission sheets overlaid at intervals, in which each gas transmission sheet can be inspected individually even if the plurality of gas transmission sheets are held by means of a holder while being overlaid, and to provide a breathable container using the same, and an inspection method of the gas transmission member.SOLUTION: A gas transmission member includes a plurality of gas transmission sheets 2 for transmitting gas, and a holder 3 including a gas flow hole 3a and holding each gas transmission sheet 2. The gas transmission sheets 2 are arranged to overlap at intervals, so as to cross the flow path of gas in the gas flow hole 3a. The holder 3 also includes an interconnection hole 3m for interconnecting a space, formed between adjoining gas transmission sheets 2 in the gas flow hole 3a, and the space on the outside of the holder 3.

Description

  The present invention relates to a gas permeable member that transmits gas, and more particularly to a gas permeable member that includes a plurality of gas permeable sheets. The present invention also relates to an inspection method for the gas permeable member and a breathable container including the gas permeable member.

  If gas is generated in the sealed container, the internal pressure of the container rises and the container may be damaged or explode. For example, in a storage element such as a secondary battery, an electrolytic capacitor, an electric double layer capacitor, etc., a specific gas is generated in a container in which an electrode is accommodated, and thus such gas is not discharged outside the container. If the internal pressure increases, the container may be damaged or explode. For this reason, various structures for discharging the gas in the container to the outside of the container have been proposed.

  For example, a container that constitutes a storage element is a container that contains an electrode or an electrolyte solution, and includes a gas permeable portion that allows gas to pass therethrough, and allows gas to flow from the inside to the outside through the gas permeable portion. What has been proposed (hereinafter referred to as a breathable container) has been proposed. In such a breathable container, a gas permeable portion is formed by attaching a gas permeable sheet that transmits gas to a through hole formed in a container main body that accommodates an electrode and an electrolyte so as to cover the through hole. ing. Thereby, the gas generated inside the breathable container is configured to be discharged to the outside of the container by passing through the gas permeable portion (specifically, the gas permeable sheet) (see Patent Document 1). ).

  As another breathable container, there has been proposed one in which a gas permeable member that allows gas to permeate is attached to the through hole of the container body as described above. The gas permeable member includes a gas permeable sheet and a holding body that holds the gas permeable sheet. And the gas circulation hole which distribute | circulates gas is formed in the holding body, and the gas permeable sheet is hold | maintained so that this gas circulation hole may be crossed. The gas permeable member is attached to the through hole of the container body, so that the gas generated inside the breathable container passes through the gas circulation hole and permeates the gas permeable sheet and is discharged to the outside of the container. It is configured to be.

  As the gas permeable sheet as described above, for example, a porous film such as polytetrafluoroethylene (PTFE), a foil band of metal (nickel, palladium-silver, platinum, etc.), or platinum was vapor-deposited on a PTFE film. A foil strip or the like has been proposed (see Patent Documents 1 and 2).

  Here, as a structure of the gas permeable member, a plurality of gas permeable sheets are held by the holding body in a state where they are stacked. In such a case, each gas permeable sheet cannot be inspected for airtightness or watertightness in a state where each gas permeable sheet is held by the holding body.

International Publication No. WO2009 / 1947 Japanese Patent No. 4280014

  Therefore, the present invention is a gas permeable member comprising a plurality of gas permeable sheets stacked at intervals, and even when the plurality of gas permeable sheets are held on the holding body in a stacked state, It is an object to provide a gas permeable member capable of individually inspecting each gas permeable sheet. Another object of the present invention is to provide an inspection method for such a gas permeable member and a container using the gas permeable member.

  A gas permeable member according to the present invention includes a plurality of gas permeable sheets that allow gas to pass through, and a holding body that holds gas permeable sheets and includes gas flow holes that allow gas to flow. The holding body is arranged so as to overlap with the gas flow path in the flow hole so as to intersect with each other, and the holding body has a space formed between adjacent gas permeable sheets in the gas flow hole outside the holding body. It further has a communication hole for communicating with the space.

  According to such a configuration, the space in the gas flow hole formed between the gas permeable sheets (hereinafter also referred to as an inter-sheet space) and the space outside the holding body are communicated with each other through the communication hole. Therefore, it becomes possible to supply water and gas to the space between sheets through the communication hole. Thereby, even if each gas permeable sheet is hold | maintained in the state where it overlapped, the test | inspection of airtightness or watertightness can be performed, without isolate | separating each gas permeable sheet, respectively.

  Specifically, by supplying water from the communication hole to the inter-sheet space, the water-tightness inspection of the gas-permeable sheet itself and the water-tightness inspection between the gas-permeable sheet and the holding body are performed for each gas-permeable sheet. Can be done. In addition, by supplying gas from the communication holes to the space between the sheets, the gas-permeable sheet itself is inspected for airtightness (such as pinholes and breakage), and the airtightness between the gas-permeable sheet and the holding body The inspection can be performed for each gas permeable sheet.

  As mentioned above, since each test | inspection can be performed for every gas permeable sheet, it can be grasped | ascertained easily which gas permeable sheet has a defect.

  At least one of the plurality of gas permeable sheets is a selective permeable sheet that selectively transmits a specific gas, and at least one of the other gas permeable sheets has selectivity for a specific gas. It is a non-selective permeable sheet that does not have, and it is preferable that the non-selective permeable sheet is disposed on at least one surface side of the selective permeable sheet.

  According to such a configuration, since at least one of the plurality of gas permeable sheets is a selective permeable sheet, a desired gas can be selectively passed from one end side to the other end side of the gas flow hole. Further, the non-selective permeable sheet is arranged on at least one surface side of the selective permeable sheet, so that the non-selective permeable sheet is arranged in a region where the selective permeable sheet and the non-selective permeable sheet overlap. It is possible to prevent the selective permeable sheet from being contaminated from the other side or from being damaged by contact with other objects. That is, the non-selective transmission sheet can protect the selective transmission sheet from contamination and breakage.

  The holding body is preferably formed by integrally molding a resin material.

  According to such a configuration, a holding body is formed for each gas permeable sheet, and a holding body that holds a plurality of gas permeable sheets is formed by connecting and integrating the holding bodies that hold each gas permeable sheet. A holder that holds a plurality of gas permeable sheets can be obtained without going through such a process. Thereby, the cost (for example, a die cost, a manufacturing cost, etc.) concerning a holding body can be reduced rather than the case where a holding body is shape | molded for every gas permeable sheet.

  A breathable container according to the present invention includes any one of the gas permeable members described above and a container main body to which the gas permeable members are attached, and the space inside the container main body and the space outside the container main body are gas. It is characterized by being configured to be ventilated through a circulation hole.

  According to such a configuration, even if the atmospheric pressure is increased in the container body, the gas in the container body is discharged to the outside of the container body through the gas flow hole of the gas permeable member. Thereby, since the internal pressure of a container main body is reduced, the deformation | transformation and damage of a container main body by the raise of an internal pressure can be prevented.

  According to the present invention, it is a gas permeable member comprising a plurality of gas permeable sheets stacked at intervals, and even in a state where the plurality of gas permeable sheets are held in a holding body in a stacked state, Each gas permeable sheet can be individually inspected.

The cross-sectional perspective view which showed each member which comprises the gas permeable member which concerns on one Embodiment of this invention. The cross-sectional perspective view which showed the gas permeable member which concerns on the same embodiment. The cross-sectional perspective view which showed the air permeable container provided with the gas permeable member which concerns on the same embodiment. The cross-sectional perspective view which showed the gas permeable member which concerns on other embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated.

  As shown in FIG. 1, the gas permeable member 1 according to this embodiment includes a gas permeable sheet 2 that allows gas to permeate, and a holder 3 that holds the gas permeable sheet 2. The holding body 3 includes a gas flow hole 3a for flowing gas in one direction, and openings 3b and 3c are formed at both ends of the gas flow hole 3a. The holding body 3 has an opening (hereinafter also referred to as a discharge port) formed on the other end side of gas flowing in from an opening (hereinafter also referred to as an inflow port) 3b formed on one end side of the gas flow hole 3a. ) It can be discharged from 3c.

  As the gas permeable sheet 2, a selective permeable sheet 2a that selectively permeates a specific gas or a non-selective permeable sheet 2b that does not have selectivity with respect to a specific gas is used. In the present embodiment, a plurality (specifically, three) of gas permeable sheets 2 are used, one is a selective permeable sheet 2a, and the other two are non-selective permeable sheets 2b.

The selective permeation sheet 2a is configured to be able to selectively permeate a specific gas from one surface side to the other surface side. The gas that can be transmitted through the selective permeable sheet 2a is not particularly limited, and examples thereof include gases such as hydrogen, carbon dioxide, and oxygen.
Examples of the selective permeable sheet 2a having selectivity for hydrogen gas include a sheet material containing a resin such as aromatic polyimide, and a layer of hydrogen permeable metal (vanadium, vanadium alloy, palladium alloy, niobium, niobium alloy, etc.). What is comprised from the sheet | seat material containing is mentioned. Examples of the sheet material including the hydrogen permeable metal layer include a sheet material (metal foil) made of only the hydrogen permeable metal layer, and a sheet material obtained by depositing a metal layer on a base material layer such as a resin sheet. . Examples of the selectively permeable sheet 2a that selectively transmits carbon dioxide include a sheet material made of silicone rubber, a PVA crosslinked sheet material, a PEG crosslinked sheet material, and the like.

  The non-selective permeable sheet 2b is arranged on at least one side of the selective permeable sheet 2a (in this embodiment, the double-sided side) so as to overlap the selective permeable sheet 2a. The non-selective permeable sheet 2b can be appropriately selected according to the properties of the selective permeable sheet 2a to be overlaid. For example, a porous film made of polytetrafluoroethylene (PTFE), ceramic, metal, resin, or the like The thing comprised from sheet materials, such as these, is mentioned. In particular, a porous membrane made of PTFE has high water repellency, high heat resistance, and high chemical resistance, and thus is preferable as a sheet material constituting the non-selective permeable sheet 2b.

  The holding body 3 includes a gas flow hole 3a through which gas flows in one direction, and an inlet 3b and an outlet 3c are formed at both ends of the gas flow hole 3a. That is, the holding body 3 includes a flow path through which gas flows in the gas flow hole 3a from the inlet 3b side of the gas flow hole 3a toward the discharge port 3c. Thereby, the holding body 3 can discharge | emit the gas which flows in in the gas distribution hole 3a from the one end part 3d provided with the inflow port 3b of the gas flow hole 3a from the other end part 3e provided with the discharge port 3c of the gas flow hole 3a. Composed. In the present embodiment, the holding body 3 is formed in a cylindrical shape (specifically, a cylindrical shape with the axis L as the center), and a gas flow hole 3a is formed in the center thereof.

  Here, the axis L refers to a virtual line that passes through the central portions of the openings 3b and 3c formed at both ends of the gas flow hole 3a. In the following description, the direction intersecting the axis L and away from the axis L is referred to as “outward”, and the direction intersecting the axis L and away from the axis L is the axis line. The direction toward L is “inward”.

  The gas flow hole 3a has an intermittent and / or continuous cross section perpendicular to the axis L from the one end side (inlet 3b side) to the other end side (exhaust port 3c side) along the axis L. In the embodiment, it is formed to be intermittently large. Specifically, the gas flow hole 3a has a first wall portion 3f that is formed on the most end side and a cross-sectional shape that is formed on the other end side of the first wall portion 3f and that is more cross-sectional than the first wall portion 3f. A large second wall portion 3g and a third wall portion 3h formed on the other end side of the second wall portion 3g and having a larger cross-sectional shape than the second wall portion 3g are provided. Each of the wall portions 3f, 3g, 3h is formed along the axis L. A sheet attachment portion 3i (specifically, an inner attachment portion 3j) described later is formed between the wall portions 3f, 3g, and 3h.

  The holding body 3 includes a plurality of sheet attachment portions 3i for attaching the gas permeable sheets 2 (specifically, the selective permeable sheet 2a and the non-selective permeable sheet 2b). The seat attachment portion 3i is formed in an annular shape so as to intersect with the respective wall portions 3f, 3g, 3h (that is, along the direction intersecting with the axis L). In the present embodiment, the holding body 3 includes a plurality of sheet attachment portions 3i (hereinafter, also referred to as inner attachment portions 3j) configured to be able to attach the gas permeable sheet 2 to the inside of the gas circulation holes 3a. A sheet attachment portion 3i (hereinafter also referred to as an outer attachment portion 3k) configured to be able to attach the gas permeable sheet 2 to the outside of 3a is provided.

  In the present embodiment, the holding body 3 includes two inner attachment portions 3j. And one inner side attachment part 3j is formed between the 1st wall part 3f and the 2nd wall part 3g in the gas flow hole 3a, and is outward (from the 1st wall part 3f (or the 2nd wall part 3g)). Or inward). More specifically, the one inner attachment portion 3j has an axial line so as to connect the end portion of the first wall portion 3f on the second wall portion 3g side and the end portion of the second wall portion 3g on the first wall portion 3f side. It is formed along the direction intersecting L (in a planar shape). Further, the other inner attachment portion 3j is formed between the second wall portion 3g and the third wall portion 3h in the gas flow hole 3a, and outward (from the second wall portion 3g (or the third wall portion 3h)). (Or inward). More specifically, the other inner attachment portion 3j is connected to the end portion on the third wall portion 3h side in the second wall portion 3g and the end portion on the second wall portion 3g side in the third wall portion 3h. It is formed along the direction intersecting L (in a planar shape).

  The outer attachment portion 3k is formed at the other end 3e of the holding body 3 (specifically, around the discharge port 3c at the other end 3e). In other words, the outer attachment portion 3k is configured by a region extending outward from the end on the discharge port 3c side in the third wall portion 3h of the gas flow hole 3a.

  The holding body 3 further includes a communication hole 3m (specifically, a plurality of communication holes 3m) that allows the space in the gas flow hole 3a to communicate with the space outside the holding body 3. In the present embodiment, the communication hole 3m is formed along a direction that intersects the axis L (specifically, substantially orthogonal). Further, the communication hole 3m has an opening 3n that opens the space in the communication hole 3m into the gas flow hole 3a and a space outside the holding body 3 (specifically, in a direction intersecting the axis L). And an opening 3p to be opened.

  In the present embodiment, the holding body 3 includes two communication holes 3m. The opening 3n of one communication hole 3m is formed in the second wall 3g of the gas flow hole 3a, and the opening 3n of the other communication hole 3m is the third wall 3h of the gas flow hole 3a. Formed. That is, one communication hole 3m is formed so as to communicate the space surrounded by the second wall 3g and the space outside the holding body 3, and the other communication hole 3m is surrounded by the third wall 3h. The formed space and the space outside the holding body 3 are formed to communicate with each other. And in this embodiment, the opening part 3p of each communicating hole 3m is formed in the outer peripheral surface of the holding body 3 (specifically the large outer shape part 3r mentioned later) formed along the axis line L. As shown in FIG.

  In addition, the holding body 3 has an outer peripheral shape of a cross section perpendicular to the axis L intermittently and / or continuously along the axis L from the one end 3d side toward the other end 3e (in the present embodiment, intermittent). It is formed to be large. Thereby, the holding body 3 includes a region 3q on the side of the one end portion 3d (hereinafter also referred to as a small outer shape) having a small outer peripheral shape in section and a region on the other end side (hereinafter referred to as a large outer shape portion) having a large outer peripheral shape in cross section. 3r), and a step is formed between the small outer portion 3q and the large outer portion 3r.

  The material (resin material) constituting the holder 3 as described above is not particularly limited. For example, heat such as polybutylene terephthalate (PBT), acrylonitrile butadiene styrene resin (ABS resin), thermoplastic elastomer or the like. Examples thereof include a plastic resin. It is preferable to use a thermoplastic resin from the viewpoint that the gas permeable sheet 2 is easily welded.

  The gas permeable member 1 as shown in FIG. 2 is formed by attaching the gas permeable sheet 2 (specifically, the selective permeable sheet 2a and the non-selective permeable sheet 2b) having the above configuration to the holding body 3. Is done. First, the gas permeable sheet 2 (specifically, one inner mounting portion 3j) positioned on the most end portion 3d side (the inlet 3b side of the gas flow hole 3a) of the holding body 3 is provided. Specifically, a non-selective transmission sheet 2b) is placed. At this time, the peripheral edge of the gas permeable sheet 2 (specifically, the non-selective permeable sheet 2b) is in contact with the sheet attaching part 3i (specifically, one inner attaching part 3j). Then, the peripheral portion of the non-selective permeable sheet 2b and one inner attachment portion 3j are bonded (specifically, bonded using a double-sided tape or heat seal), so that the one inner attachment portion 3j is not selected. The transparent sheet 2b is attached.

  Next, the other end 3e side of the holding body 3 (the outlet 3c side of the gas flow hole 3a) than the sheet attaching part 3i (specifically, one inner attaching part 3j) to which the non-selective permeable sheet 2b is attached. The gas permeable sheet 2 (specifically, the selective permeable sheet 2a) is placed on the sheet mounting portion 3i (specifically, the other inner mounting portion 3j) positioned at the same position. At this time, the peripheral edge of the gas permeable sheet 2 (specifically, the selective permeable sheet 2a) is in contact with the sheet attaching part 3i (specifically, the other inner attaching part 3j). Then, the peripheral portion of the non-selective transmissive sheet 2b and the other inner attachment portion 3j are bonded (specifically, bonded using a double-sided tape or heat seal), whereby the other inner attachment portion 3j is selective. The transmission sheet 2a is attached.

  As described above, the gas permeable sheets 2 (specifically, the selective permeable sheet 2a and the non-selective permeable sheet 2b) are attached to the holding body 3, whereby each gas permeable sheet 2 (specifically, the selectivity). The permeable sheet 2a and the non-selective permeable sheet 2b) are arranged so as to intersect the gas flow path in the gas flow hole 3a. Moreover, each gas permeable sheet 2 is arrange | positioned so that it may overlap with the space | interval, and a space is formed between the gas permeable sheets 2. The non-selective permeable sheets 2b and 2b are arranged on both sides of the selective permeable sheet 2a, so that the selective permeable sheet 2a is on both sides (specifically, inside and outside of the container body A described later). Is prevented from being contaminated. That is, the non-selective permeable sheet 2b functions as a protective sheet that protects the selective permeable sheet 2a from contamination and damage.

  Finally, the gas permeable sheet 2 (specifically, the non-selective permeable sheet 2b) is placed on the sheet mounting portion 3i (specifically, the outer mounting portion 3k) located on the most other end side of the holding body 3. To do. At this time, the peripheral edge portion of the gas permeable sheet 2 (specifically, the non-selective permeable sheet 2b) comes into contact with the sheet attachment portion 3i (specifically, the outer attachment portion 3k). Then, the non-selective transparent sheet 2b is bonded to the outer attachment portion 3k by bonding the peripheral edge portion of the non-selective transmission sheet 2b and the outer attachment portion 3k (specifically, bonding using a double-sided tape or heat seal). Is attached.

  By attaching each gas permeable sheet 2 to the holding body 3 as described above, between the adjacent gas permeable sheets 2 in the gas flow hole 3a (specifically, the selective permeable sheet 2a and the non-selective permeable sheet). 2b) and the space outside the holding body 3 communicate with each other through the communication hole 3m. In the present embodiment, the space surrounded by the selective permeable sheet 2a, the non-selective permeable sheet 2b, and the second wall portion 3g is communicated with the space outside the holding body 3 through one communication hole 3m, and the selective permeable sheet is formed. A space surrounded by the sheet 2a, the non-selective permeable sheet 2b, and the third wall portion 3h is communicated with a space outside the holding body 3 through the other communication hole 3m.

  Various tests may be performed on the gas permeable member 1 formed as described above. For example, an airtightness test and a watertightness test are performed on each gas permeable sheet 2 held in the holding body 3. Thereby, it is confirmed whether each gas permeable sheet 2 has a pinhole. In addition, as another test, an air tightness test and a water tight test are performed between the gas permeable sheet 2 and the holding body 3 (specifically, between the gas permeable sheet 2 and the sheet attachment portion 3i). Thereby, it is confirmed whether or not there is a gap between the gas permeable sheet 2 and the holding body 3 (specifically, between the gas permeable sheet 2 and the sheet attachment portion 3i).

  As a method of such an airtightness and watertightness test, water is sent from the communication hole 3m between the selective permeable sheet 2a and the non-selective permeable sheet 2b, and a visual check or a camera inspection is performed for water leakage. . Further, He or Ar gas is sent from the communication hole 3m between the selective permeable sheet 2a and the non-selective permeable sheet 2b, and the leakage detector (LD Science-made LD239) is used to measure whether there is any gas leakage. Is called. Specifically, the non-selective permeable sheet 2b is welded to one inner attachment portion 3j. And water is supplied into the gas flow hole 3a from the inlet 3b, water pressure is applied to the non-selective permeable sheet 2b in the direction along the axis L, and water leakage at this time is inspected (water resistance test). . Next, the selective transmission sheet 2a is welded to the other inner attachment portion 3j. Then, He or Ar gas is supplied from one communication hole 3m between the selective permeable sheet 2a and the non-selective permeable sheet 2b, and gas leakage from the selective permeable sheet 2a is inspected (airtightness test). Next, the non-selective transmission sheet 2b is welded to the outer attachment portion 3k. Then, water is supplied from the other communication hole 3m between the selectively permeable sheet 2a and the non-selective permeable sheet 2b, and water pressure is applied in the direction along the axis L to the non-selective permeable sheet 2b. Check for water leaks (water resistance test).

  As shown in FIG. 3, the gas permeable member 1 formed as described above is attached to a container main body A having an internal space for accommodating other members to constitute a breathable container A1. The container main body A is composed of a main body B having an internal space for accommodating other members, and a container lid C that closes an opening of the main body B, and the gas permeable member 1 is placed in the container lid C. It is configured to be attachable.

  The container lid C includes a through hole C1 that penetrates the container lid C in the thickness direction, and an opening C2 is formed on one end side of the through hole C1 so as to face the internal space of the main body B. On the other end side, an opening C3 is formed so as to face the space outside the container body A. And the gas permeable member 1 is attached to the container main body A (specifically, the container lid C) by inserting the gas permeable member 1 into the through hole C1.

  The through-hole C1 includes a small outer shape portion insertion portion C4 into which the small outer shape portion 3q of the holding body 3 is inserted and a large outer shape portion insertion portion C5 into which the large outer shape portion 3r of the holding body 3 is inserted. . The small outer shape portion insertion portion C4 is formed on one end side of the through hole C1, and is configured such that a cross-sectional shape orthogonal to the thickness direction of the container lid C is smaller than the other end side of the through hole C1. On the other hand, the large outer shape portion insertion portion C5 is formed on the other end side of the through hole C1, and is configured so that a cross-sectional shape orthogonal to the thickness direction of the container lid C is larger than one end side of the through hole C1. The Thereby, a level | step difference is formed between the small external part insertion part C4 and the large external part insertion part C5. That is, the through-hole C1 has a cross-sectional shape orthogonal to the thickness direction of the container lid C so that the through-hole C1 increases intermittently from one end side (opening C2 side) to the other end side (opening C3 side). It is formed.

  And the through-hole C1 is obstruct | occluded by inserting the gas permeable member 1 in the through-hole C1. At this time, the small outer shape portion 3q of the holding body 3 is inserted into the small outer shape portion insertion portion C4 of the through hole C1, so that the small outer shape portion 3q is fitted into the small outer shape portion insertion portion C4, and the gas permeation is performed. The member 1 is fixed to the container lid C. Further, the end portion on the small outer shape portion 3q side of the large outer shape portion 3r of the holding body 3 (specifically, the end portion located outside the outer peripheral surface of the small outer shape portion 3q) 3s is small in the through hole C1. It contacts the step formed between the outer shape portion insertion portion C4 and the large outer shape portion insertion portion C5. Thereby, it is prevented that the gas permeable member 1 falls to the inner side of the container main body A. On the other hand, by inserting the large outer shape portion 3r of the holding body 3 into the large outer shape portion insertion portion C5 of the through hole C1, a space (specifically, between the large outer shape portion 3r and the large outer shape portion insertion portion C5, An annular gap) is formed.

  The gap between the large outer shape portion 3r and the large outer shape portion insertion portion C5 communicates with the space in the gas flow hole 3a through the communication hole 3m of the gas permeable member 1 (specifically, the holding body 3). It is embedded by an embedding material C6 that fills such a gap. By filling the gap with the embedding material C6, the communication hole 3m of the gas permeable member 1 (specifically, the holding body 3) is sealed, and the gas permeable member 1 is fixed in the through hole C1. Is done. The material constituting the embedding material C6 is not particularly limited, but preferably has flexibility and elasticity so as to follow such a gap and adhere, for example, silicone rubber, ethylene- It is preferable to use a rubber material such as propylene-diene rubber (EPDM).

  As described above, the gas generated inside the breathable container A1 (specifically, the container main body A) by attaching the gas permeable member 1 to the container main body A (specifically, the container lid C). Can be discharged to the outside through the gas permeable member 1. Specifically, when gas is generated in the container main body A, the internal pressure of the container main body A increases. Along with this, the gas in the container main body A flows into the gas flow hole 3a from the inlet 3b. And the gas which flowed into the gas distribution hole 3a permeate | transmits each gas permeable sheet 2, when distribute | circulating the inside of the gas distribution hole 3a toward the discharge port 3c side. And the gas which permeate | transmitted each gas permeable sheet 2 is discharged | emitted from the discharge port 3c of the gas distribution hole 3a to the outer side of air permeable container A1. Thereby, the internal pressure of the container main body A will fall.

  The air-permeable container A1 as described above, for example, is used for accommodating electrodes and the like as members constituting power storage elements such as a secondary battery, an electrolytic capacitor (such as an aluminum electrolytic capacitor), and an electric double layer capacitor. May be used. In such a case, various gases are generated inside the breathable container A1. For example, when the breathable container A1 is used as a container constituting an aluminum electrolytic capacitor, hydrogen gas is generated, and when used as a container constituting an electric double layer capacitor, carbon dioxide gas is generated. It will be. For this reason, it is possible to discharge only a specific gas to the outside of the breathable container A1 by selecting a material constituting the selective transmission sheet 2a according to the type of gas generated in the breathable container A1. It becomes.

  As described above, according to the gas permeable member and the air permeable container according to the present invention, the gas permeable member includes a plurality of gas permeable sheets stacked at intervals, and the plurality of gas permeable sheets are stacked. Each gas permeable sheet can be individually inspected even in a state of being held by the holding body.

  That is, in the gas permeable member 1, a space in the gas flow hole 3a formed between the gas permeable sheets 2 (hereinafter also referred to as an inter-sheet space) and a space outside the holding body 3 are connected via the communication hole 3m. Therefore, it becomes possible to supply water and gas to the space between the sheets through the communication hole 3m. Thereby, even if it hold | maintains at the holding body 3 in the state in which each gas permeable sheet 2 was piled up, it can test | inspect an airtightness and watertightness, without isolate | separating each gas permeable sheet 2, respectively.

  Specifically, by supplying water from the communication hole 3m to the inter-sheet space, the water-tightness inspection of the gas-permeable sheet 2 itself and the water-tightness inspection between the gas-permeable sheet 2 and the holding body 3 are performed. This can be done for each gas permeable sheet 2. Further, by supplying a gas from the communication hole 3m to the space between the sheets, the gas-permeable sheet 2 itself is inspected for airtightness (pinhole, breakage, etc.) and between the gas-permeable sheet 2 and the holding body 3 The airtightness test can be performed for each gas permeable sheet 2.

  As mentioned above, since each test | inspection can be performed for every gas permeable sheet 2, it can be grasped | ascertained easily which gas permeable sheet 2 has a defect.

  Further, since at least one of the plurality of gas permeable sheets 2 is the selective permeable sheet 2a, a desired gas can be selectively passed from one end side to the other end side of the gas flow hole 3a. Further, the non-selective permeable sheet 2b is disposed on at least one surface side of the selective permeable sheet 2a, so that the non-selective transmissive sheet 2a and the non-selective permeable sheet 2b overlap each other. It is possible to prevent the selective transmission sheet 2a from being contaminated from the side on which the sheet 2b is disposed or from being damaged by contact with other objects. That is, the non-selective transmission sheet 2b can protect the selective transmission sheet 2a from contamination and breakage.

  Even in the case where the atmospheric pressure increases in the container main body A, the gas in the container main body A is discharged to the outside of the container main body A through the gas flow holes 3 a of the gas permeable member 1. Thereby, since the internal pressure of the container main body A is reduced, the deformation | transformation and damage of the container main body A by the raise of an internal pressure can be prevented.

  The gas permeable member and the air permeable container according to the present invention are not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. Further, the configurations and methods of the plurality of embodiments described above may be arbitrarily adopted and combined (even if the configurations and methods according to one embodiment are applied to the configurations and methods according to other embodiments). Of course, it is of course possible to arbitrarily select configurations, methods, and the like according to various modifications described below and employ them in the configurations, methods, and the like according to the above-described embodiments.

  For example, in the above embodiment, the selective transmission sheet 2a and the non-selective transmission sheet 2b are attached to each of the two inner attachment portions 3j, and the non-selection transmission sheet 2b is attached to the outer attachment portion 3k. However, the present invention is not limited to this. Instead of the non-selective transmission sheet 2b attached to the inner attachment portion 3j, the one end portion 3d of the holding body 3 is not selected so as to cover the inlet 3b of the gas circulation hole 3a. The property permeability sheet 2b may be attached. Further, an inner attachment portion 3j is further formed on the discharge port 3c side than the inner attachment portion 3j to which the selective transmission sheet 2a is attached, and the inner attachment portion is replaced with the non-selective transmission sheet 2b attached to the outer attachment portion 3k. A non-selective transmission sheet 2b may be attached to 3j.

  Moreover, in the said embodiment, although the selective permeable sheet 2a and the non-selective permeable sheet 2b are used as the gas permeable sheet 2, it is not limited to this, For example, the selective permeable sheet 2a or Only one or a plurality of the non-selective permeable sheets 2 b may be used as the gas permeable sheet 2.

  Moreover, in the said embodiment, although the holding body 3 is comprised so that the small external shape part 3q and the large external shape part 3r may be comprised, it is not limited to this, For example, as shown in FIG. The holding body 30 configured without the outer peripheral shape of the cross section orthogonal to L changing along the axis L may be used. In the gas permeable member 10 having such a holding body 30, a flange portion 30 r is provided on the outer peripheral surface of the holding body 30, so that a region on one end side (opening 3 b side) of the holding body 30 and the flange portion 30 r are provided. A step is formed. The gas permeable member 10 is brought into contact with the container main body A by the flange portion 30r coming into contact with the step formed between the small outer shape portion insertion portion C4 and the large outer shape portion insertion portion C5 in the through hole C1 of the container lid C. It is prevented from falling to the inside.

  Moreover, in the said embodiment, although comprised so that the gas permeable sheet 2 may be attached to the holding body 3, it is not limited to this, For example, when carrying out resin molding of the holding body 3, it is a gas permeable sheet. 2 and the holding body 3 may be integrally formed.

  In the above embodiment, one communication hole 3m is formed in each of the space surrounded by the second wall portion 3g and the space surrounded by the third wall portion 3h among the spaces in the gas flow hole 3a. However, the present invention is not limited to this. For example, a plurality of communication holes 3m around the axis around the axis L may be formed.

  Moreover, in the said embodiment, although the gas-permeable member 1 is inserted in the through-hole C1 of the container lid C, the embedding material C6 is arrange | positioned between the through-hole C1 and the gas-permeable member 1, For example, when the through hole C1 and the gas permeable member 1 are in close contact with each other and no gap is formed between the through hole C1 and the gas permeable member 1, for example, The material C6 may not be used.

DESCRIPTION OF SYMBOLS 1,10 ... Gas permeable member, 2 ... Gas permeable sheet, 2a ... Selective permeable sheet, 2b ... Non-selective permeable sheet, 3,30 ... Holding body, 3a ... Gas flow hole, 3b ... Inlet, 3c ... Exhaust Exit, 3f ... 1st wall part, 3g ... 2nd wall part, 3h ... 3rd wall part, 3i ... Seat attachment part, 3j ... Inner attachment part, 3k ... Outer attachment part, 3m ... Communication hole, 3q ... Small external shape Portion, 3r ... large outer shape portion, 30r ... flange portion, A1 ... breathable container, A ... container body, B ... main body portion, C ... container cover, C1 ... through hole, C4 ... small outer shape portion insertion portion, C5 ... Large external part insertion part, C6 ... embedding material, L ... axis

Claims (4)

A plurality of gas permeable sheets that allow gas to pass through, and a holding body that holds each gas permeable sheet as well as gas circulation holes that allow gas to flow,
Each gas permeable sheet is arranged so as to overlap with a gap so as to intersect the gas flow path in the gas flow hole,
The holding body further includes a communication hole that communicates a space formed between adjacent gas-permeable sheets in the gas flow hole with a space outside the holding body. At least one of the plurality of gas permeable sheets is a selective permeable sheet that selectively transmits a specific gas, and at least one of the other gas permeable sheets has selectivity for a specific gas. It is a non-selective transmission sheet that does not have
The gas permeable member according to claim 1, wherein a non-selective permeable sheet is disposed on at least one surface side of the selective permeable sheet.   The gas permeable member according to claim 1 or 2, wherein the holding body is formed by integrally molding a resin material. A gas permeable member according to any one of claims 1 to 3, and a container body to which the gas permeable member is attached,
A breathable container characterized in that a space inside the container body and a space outside the container body are configured to be ventilated through a gas flow hole.

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