JP2015167907A - Gas permeation member and air permeable container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas permeation member which is easily attached to or detached from a through hole of a container body, and to provide an air permeable container.SOLUTION: A gas permeation member 1 includes: a gas permeable sheet 2 which is formed at a container body A having an interior space S so as to be attached to a through hole C1 which allows an exterior space of the container body A to communicate with the interior space S, the gas permeable sheet 2 which allows a gas in the interior space S to permeate to the exterior space of the container body A; and a holder 3 which holds the gas permeable sheet 2 and has a gas circulation hole 3a for circulating the gas. The holder 3 is formed so as to be engaged with or disengaged from the through hole C1 of the container body A.

Description

  The present invention relates to a gas permeable member that allows gas to permeate, 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 power storage element such as a secondary battery, an electrolytic capacitor, an electric double layer capacitor, and the like, a specific gas is generated in a container in which an electrode is accommodated, and thus such gas is discharged out of the container. Breathable containers are used.

  For example, as an air-permeable container for an electrolytic capacitor, a container body having an internal space for accommodating an electrode and an electrolytic solution, and a gas permeable member that allows gas to pass therethrough, the gas permeable member being a through-hole provided in the container body What is attached to is known (refer to Patent Document 1).

  The gas permeable member described in Patent Document 1 includes a sheet-like permeable rubber and fixing means for fixing the permeable rubber to the through hole. The fixing means has a disk material and a vertical wall extending radially outward on the outer periphery of the disk material. Moreover, the through-hole of the container main body has a large-diameter portion, a small-diameter portion communicating with the large-diameter portion in the axial direction, and a step portion that connects the inner peripheral surfaces of the large-diameter portion and the small-diameter portion.

  When the gas permeable member is attached to the through hole, the permeable rubber is inserted from the large diameter portion of the through hole and placed on the stepped portion, and the fixing means is inserted from the large diameter portion of the through hole. Is pressed and fixed. When inserting the fixing means into the large diameter portion, the vertical wall of the fixing means is inserted by being elastically contracted with respect to the inner peripheral surface of the large diameter portion, and the elastic force of the vertical wall is applied to the inner peripheral surface of the large diameter portion. By acting, the fixing means is held in the large diameter portion.

  However, in such a breathable container, as described above, the fixing means of the gas permeable member is held in the through hole by the elastic force of the vertical wall. If the elastic force of the vertical wall is weak, the fixing means of the gas permeable member is penetrated. Since it is difficult to hold the hole stably attached to the hole, it is necessary to increase the elastic force of the vertical wall. When the elastic force of the vertical wall is increased as described above, it is not easy to insert or remove the fixing means from the through hole against the elastic force. This point is common not only to the conventional electrolytic capacitor described above, but also to the gas permeable member of the conventional breathable container according to the other power storage element.

JP 2006-108185 A

  Then, this invention makes it a subject to provide the gas permeable member and air permeable container which can be easily attached or detached to the through-hole of a container main body.

  The gas permeable member according to the present invention is formed in a container main body having an internal space, and is configured to be attachable to a through-hole that communicates the space outside the container main body with the internal space. A gas permeable member comprising a gas permeable sheet that is permeable to a space outside the main body, and a holding body that holds the gas permeable sheet and has a gas flow hole for gas to circulate, wherein the holding body is The container body is configured to be freely disengageable with respect to the through hole of the container body.

  In such a gas permeable member, since the holding body is configured to be freely engaged with and disengaged from the through hole of the container body, it can be easily attached to or detached from the through hole by engaging and disengaging the holding body with the through hole.

  In the gas permeable member according to the present invention, the holding body can be configured to be screwable with respect to the through hole of the container body.

  In such a gas permeable member, the holding body can be attached to or removed from the through hole very easily by screwing the holding body into the through hole of the container body.

  The breathable container according to the present invention includes the gas permeable member and a container body having a through hole in which a holding body of the gas permeable member is detachably provided.

  In such a breathable container, since the holding body of the gas permeable member is configured to be freely engaged with and disengaged from the through hole of the container body, the gas permeable member can be easily attached to the container body by engaging and disengaging the holding body with the through hole. Can be removed.

  According to the gas permeable member and the air permeable container of the present invention, the gas permeable member holding body is configured to be freely engageable with the through hole of the container main body. Can be easily attached to or removed from the container body.

Sectional drawing which showed the air permeable container provided with the gas permeable member which concerns on one Embodiment of this invention is shown. Sectional drawing of the gas permeable member which concerns on the same embodiment is shown.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. For convenience of explanation, the vertical direction and the horizontal direction are defined with reference to FIG.

  The breathable container according to the present embodiment is a container for a storage element such as a secondary battery, an electrolytic capacitor (such as an aluminum electrolytic capacitor), or an electric double layer capacitor. As shown in FIG. 1, the air permeable container A1 has an internal space S that accommodates a predetermined member (for example, an electrode or an electrolyte), and communicates the internal space S with the outside (the space outside the container body). The container main body A which the through-hole C1 penetrates and the gas permeable member 1 provided in the said through-hole C1 are provided.

  The container main body A has a through-hole C1 penetrating through a housing having an internal space S in which a predetermined member is accommodated. The container main body A of the present embodiment includes a main body B that has an opening and can accommodate a predetermined member from the opening, and a container lid C (closing body) that closes the opening of the main body B. Have.

  The main body B of the present embodiment has a bottomed cylindrical shape and is open on the top surface, and specifically includes a disk-shaped bottom wall and side walls that are provided upright at the periphery of the bottom wall. Is done. The container lid C of the present embodiment is a plate-like body, specifically a disc. The container lid C is provided with a through hole C1 penetrating in the thickness direction. The through hole C1 is one or a plurality of holes. The through hole C1 of the present embodiment is one hole that penetrates in the vertical direction in the radial center of the container lid C that is a disk. The through-hole C1 is provided with a locked portion D for locking the gas permeable member 1. The locked portion D of the present embodiment is a screw groove (for example, a spiral groove) that is notched along the axis (vertical direction) on the inner peripheral surface of the through hole C1. The container lid C is configured to be fitted to the main body B so as to close the upper surface opening of the main body B.

  In such a container main body A, the inner space S defined by the inner surfaces of the main body B and the container lid C is formed by fitting the container lid C into the opening of the main body B. A predetermined member can be accommodated in the internal space S. The through hole C1 of the container lid C is a hole that communicates the internal space S with the outside, and the gas permeable member 1 is provided in the through hole C1.

  The gas permeable member 1 is configured to allow gas from the internal space S of the container body A to permeate to the outside. As shown in FIG. 2, the gas permeable member 1 of the present embodiment includes a gas permeable sheet 2 that allows the gas in the internal space S of the container body A to permeate to the outside, and a holding body 3 that holds the gas permeable sheet 2. .

  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) composed of only the hydrogen permeable metal layer, a sheet material obtained by depositing a metal layer on a base material layer such as a resin sheet, and the like. . 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 disposed on at least one side of the selective permeable sheet 2a (both sides in the present embodiment) 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 non-selective permeable sheet 2b of the present embodiment is composed of a porous membrane sheet material made of PTFE.

  The holding body 3 has a shape along the axial direction (or the axis or the central axis) of the through-hole C1, and has a gas flow hole 3a through which gas flows. The holding body 3 of the present embodiment forms a long cylindrical body (specifically, a cylindrical body) along the vertical direction. Specifically, the holding body 3 extends downward from the large-diameter portion 31 that is a cylindrical body having an outer diameter larger than the diameter of the through hole C1 and the lower-end surface central portion side of the large-diameter portion 31 and is large. A medium-diameter portion 32 that is a cylindrical body having a small outer diameter and a substantially equal inner diameter with respect to the diameter portion 31, and extends downward from the outer peripheral side of the lower end surface of the medium-diameter portion 32. A lower part 33 which is a cylindrical body having a substantially equal diameter and a large inner diameter, and a cylindrical body which extends downward from the outer peripheral side of the lower end surface of the lower part 33 and has a substantially equal outer diameter with respect to the lower part 33 and a large inner diameter. And a lower end 34. In addition, the outer diameter of the medium diameter part 32 is smaller than or substantially equal to the diameter of the through hole C1.

  Here, the inner peripheral surfaces of the large diameter part 31 and the medium diameter part 32 are flush with each other. The inner peripheral surfaces of the intermediate diameter portion 32 and the lower portion 33 are connected by a lower end surface central portion 32b (specifically, an annular flat surface) of the intermediate diameter portion 32 with a step in the radial direction. The inner peripheral surfaces of the lower portion 33 and the lower end portion 34 are connected by a lower end surface central portion 33a (specifically, an annular flat surface) of the lower portion 33 with a step in the radial direction. The large-diameter portion 31, the intermediate-diameter portion 32, the intermediate-diameter portion 32, and the lower portion 33 are each an inner peripheral surface, a lower-end surface central portion 32b of the intermediate-diameter portion 32, and a lower-end surface central portion 33a of the lower portion 33. By connecting (connecting) to each other, an inner surface is continuously formed, and the inner surface forms the gas flow hole 3a.

  The gas flow hole 3a is a through hole through which gas flows in one direction (axial direction) from the internal space S side to the outside. Of the two axial ends of the gas flow hole 3a, the opening on the inner space S side is the gas inlet 3b, and the opening on the outer side is the gas outlet 3c. That is, the gas flow hole 3a is a flow path through which gas flows from the inlet 3b side toward the outlet 3c side. The gas flow hole 3 a of the present embodiment is one through hole that penetrates in the vertical direction from the radial center of the upper surface of the holding body 3 to the lower surface.

  The gas flow hole 3a is configured to hold the gas permeable sheet 2 and is a hole for providing the gas permeable sheet 2. In the present embodiment, the gas permeable sheet 2 (specifically, the non-selective permeable sheet 2b) can be attached to the end of the large diameter portion 31 (discharge port 3c) in the gas flow hole 3a, and the medium diameter portion The gas permeable sheet 2 (specifically, the selective permeable sheet 2a) can be attached to the lower end surface central portion 32b of the lower portion 33 and the inner peripheral surface of the lower portion 33. The gas permeable sheet 2 (specifically, the non-selective permeable sheet 2b) can be attached to the inner peripheral surface of 34. Specifically, the gas permeable sheet 2 (specifically, the non-selective permeable sheet 2b) is placed on the opening end of the large-diameter portion 31 and bonded (specifically, bonded using a double-sided tape or heat seal). Or the gas permeable sheet 2 (specifically, the selective permeable sheet 2a) is bonded to the inner peripheral surface of the lower end surface portion 32b of the middle diameter portion 32 and the lower portion 33 (specifically, the selective permeable sheet 2a). The gas permeable sheet 2 (specifically non-selective permeation) can be applied to the lower end surface central portion 33a of the lower portion 33 and the inner peripheral surface of the lower end portion 34. The sheet 2b) can be bonded (specifically, bonded or welded using a double-sided tape or heat seal).

  The material constituting the holder 3 is not particularly limited, and examples thereof include thermoplastic resins such as polybutylene terephthalate (PBT), acrylonitrile butadiene styrene resin (ABS resin), and thermoplastic elastomer. It is preferable to use a thermoplastic resin from the viewpoint of easy molding. In addition, the material which comprises the holding body 3 can also be comprised with a stainless steel material (SUS), aluminum, etc. as a metal material.

  Here, the holding body 3 is provided with a locking portion 32a that is detachably locked to the locked portion D of the through hole C1. The locking portion 32 a is a screw portion made of a screw thread (for example, a spiral thread) that is provided on the outer peripheral surface of the medium diameter portion 32 along the axial direction (vertical direction). It is configured to be compatible. Specifically, the locking portion 32a is screwed into the locked portion D (thread groove) of the through hole C1 and is movable in the axial direction. That is, the gas permeable member 1 (holding body 3) is moved into the container by screwing the locking portion 32a into the locked portion D (thread groove) of the through hole C1 and moving it to the inner space S side (downward side). The gas permeable member 1 (holding body 3) is moved to the container main body A (the holding body 3) by moving the locking portion 32a to the outside (upper side) in the mounting state attached to the main body A (through hole C1). It can be removed from the through hole C1).

  In the present embodiment, the gas permeable member 1 includes the outer surface of the holding body 3 and the inner surface of the through hole C1 in a state where the gas permeable member 1 (holding body 3) is attached to the container main body A (through hole C1). It further has a sealing body P for preventing external foreign matter from entering between the gaps. The sealing body P is provided on the outer peripheral surface of the upper end of the middle diameter portion 32 of the holding body 3 and is constituted by an annular elastic body. The sealing body P can be composed of an elastic resin packing (O-ring) made of, for example, silicone rubber or ethylene-propylene-diene rubber (EPDM).

  In the breathable container A1 configured as described above, a predetermined member is accommodated in the internal space S of the main body B, and a container lid C is attached to the main body B so as to close the upper surface opening of the main body B. The gas permeable member 1 is attached to the through hole C1 of the lid C. The gas flow hole 3 a of the gas permeable member 1 communicates the internal space S with the outside and holds the gas permeable sheet 2. Specifically, in the gas flow hole 3 a of the holding body 3, the non-selective permeable sheet 2 b is placed and welded to the opening end of the large-diameter portion 31, and the lower-end surface central portion 32 b and the lower portion of the medium-diameter portion 32. The selective permeable sheet 2 a is welded to the inner peripheral surface 33, and the non-selective permeable sheet 2 b is welded to the lower end surface central portion 33 a of the lower portion 33 and the inner peripheral surface of the lower end portion 34. The gas permeable sheet 2 is disposed across the gas flow hole 3a along the left-right direction intersecting the axial direction (vertical direction) of the through hole C1 and the gas flow hole 3a. Further, the gas permeable sheets 2 are arranged so as to be separated from each other in the axial direction of the gas flow holes 3 a and are overlapped with each other, and a space is formed between the gas permeable sheets 2.

  Here, the gas permeable member 1 is attached to the through hole C1 by locking the locking portion 32a and the locked portion D. Specifically, the holding body 3 is inserted into the through hole C1, and the locking portion 32a (thread) is screwed into the locked portion D (screw groove) (for example, the locking portion 32a is locked to the locked portion D ( The holding body 3 (locking portion 32a) in the axial direction until the mounting position where the lower surface of the sealing body P abuts (presses) and is fixed to the upper surface of the container lid C. It is moved downward. When the gas permeable member 1 is removed from the through-hole C1 for maintenance of the air permeable container A1 (gas permeable member 1), the locking portion 32a is rotated counterclockwise with respect to the locked portion D (said attachment). The holding body 3 (locking portion 32a) is moved upward in the axial direction to a release position where the engagement between the locking portion 32a and the locked portion D is released. Let In short, the locking portion 32a is screwed with the locked portion D, and the mounting position where the holding body 3 is abutted and fixed to the container main body A (the outer surface of the container lid C) and the locked portion D are screwed. The gas permeable member 1 (holding body 3) is attached to the container main body A (through hole C1) when the engagement portion 32a is in the attachment position, and the engagement portion 32a is moved. Is in the release position, the gas permeable member 1 (holding body 3) is removed from the container main body A (through hole C1). Thus, the gas permeable member 1 is easily attached to or detached from the container main body A (through hole C1) by the engagement / disengagement of the locking portion 32a and the locked portion D. .

  In such a breathable container A1, the gas generated inside the breathable container A1 (specifically, the container body A) during normal use of the electricity storage element (electrode) is discharged to the outside through the gas permeable sheet 2 of the gas permeable member 1. It is possible. Specifically, when gas is generated in the container main body A, the internal pressure of the container main body A increases. Accordingly, the gas in the container main body A flows into the gas flow hole 3a from the inlet 3b on the lower surface side of the container lid. And the gas which flowed in into the gas distribution hole 3a permeate | transmits each gas permeation | transmission sheet | seat 2 when distribute | circulating the inside of the gas distribution hole 3a toward the discharge port 3c side on the container lid body upper surface 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.

  As described above, when the gas permeable member 1 and the air permeable container A1 according to the present embodiment are summarized, the gas permeable member 1 according to the present embodiment is formed in the container main body A having the internal space S and is disposed outside the container main body A. A gas permeable sheet 2 that is configured to be attachable to a through hole C1 that allows the space and the internal space S to communicate with each other, and that allows the gas in the internal space S to pass through the space outside the container body A, and holds the gas permeable sheet 2 The gas permeable member 1 includes a holding body 3 having a gas flow hole 3a for flowing gas, and the holding body 3 is configured to be freely engaged with and disengaged from the through hole C1 of the container body A. It is characterized by that.

  In such a gas permeable member 1, since the holding body 3 is configured to be freely engaged with and disengaged from the through hole C1 of the container main body A, the holding body 3 can be easily attached to or detached from the through hole C1 by being engaged with or disengaged from the through hole C1. Can be removed.

  In the gas permeable member 1 according to the present embodiment, the holding body 3 is configured to be screwable with the through hole C1 of the container main body A.

  In such a gas permeable member 1, the holding body 3 can be attached to or removed from the through hole C1 very easily by screwing the holding body 3 into the through hole C1 of the container body A.

  Moreover, the gas permeable sheet 2 of this embodiment has a porous membrane sheet material made of polytetrafluoroethylene. According to the gas permeable member 1 and the air permeable container A1, since the gas permeable sheet 2 is composed of a porous membrane sheet material made of polytetrafluoroethylene, the gas permeable sheet 2 can be formed into a predetermined size. Easy to do. That is, according to the gas permeable member 1 and the air permeable container A1, the size of the gas permeable sheet 2 can be easily suppressed, and the gas permeable member 1 and the air permeable container A1 can be downsized.

  Further, in the gas permeable sheet 2 of the present embodiment, 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, Contamination from the inside and outside of the container body A is prevented. That is, the non-selective permeable sheet 2b functions as a protective sheet that protects the selective permeable sheet 2a from contamination and damage, thereby preventing deterioration of the quality of the selective permeable sheet 2a and improving the product value.

  A breathable container A1 according to the present embodiment includes the gas permeable member 1 and a container body A having a through hole C1 in which a holding body 3 of the gas permeable member 1 is detachably provided. .

  In such a breathable container A1, since the holding body 3 of the gas permeable member 1 is configured to be detachable from the through hole C1 of the container main body A, the gas permeable member 1 is engaged with and disengaged from the through hole C1. Can be easily attached to or removed from the container body A.

  In short, according to the gas permeable member 1 and the air permeable container A1 of the present embodiment, the holding body 3 of the gas permeable member 1 is configured to be freely engageable with and disengaged from the through hole C1 of the container main body A. The gas permeable member 1 can be easily attached to or detached from the container main body A by engaging / disengaging with the hole C1.

  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.

  For example, although the case where the gas permeable member 1 includes the sealing body P has been described in the above-described embodiment, the configuration is not limited thereto, and the gas permeable member 1 may be configured without the sealing body P. In this case, when the gas permeable member 1 is attached to the container main body A, the holding body 3 (the locking portion) reaches the attachment position where the lower surface of the large-diameter portion 31 of the holding body 3 is abutted (pressed) and fixed to the upper surface of the container lid C. 32a) is moved downward in the axial direction.

  Moreover, in the said embodiment, the gas permeable sheet 2 is attached to the site | part in which the level | step difference of the opening (discharge port 3c) end of the gas distribution hole 3a of the holding body 3 or the internal peripheral surface of the gas distribution hole 3a is formed. However, the present invention is not limited to this. For example, the gas permeable sheet 2 is held by the gas flow holes 3a when the holding body 3 is molded (for example, resin molding). And may be integrally formed.

  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, although the raw material which comprises the selective permeation | transmission sheet | seat 2a of the said embodiment is not specifically limited, By selecting according to the kind of gas which generate | occur | produces in breathable container A1, only a specific gas is breathable container. It is possible to discharge to the outside of A1.

  Further, in the above-described embodiment, the case where the locking portion 32a is a protruding thread and the locked portion D is a recessed thread groove is described, but the present invention is not limited thereto. For example, the locking portion 32a is a screw groove that is notched in the axial direction on the outer peripheral surface of the holding body 3, and the locked portion D is axially formed on the inner peripheral surface of the through hole C1. It is a thread that is provided in a protruding manner, and the locking portion 32a and the locked portion D can be configured to be screwed together.

  DESCRIPTION OF SYMBOLS 1 ... Gas permeable member, 2 ... Gas permeable sheet, 2a ... Selective permeable sheet, 2b ... Non-selective permeable sheet, 3 ... Holding body, 3a ... Gas flow hole, 3b ... Inlet, 3c ... Discharge port, 31 ... Large diameter part, 32 ... Medium diameter part, 32a ... Locking part, 32b ... Lower end surface center part of medium diameter part, 33 ... Lower part, 33a ... Lower end face center part of lower part, 34 ... Lower end part, A1 ... Aeration Container, A ... container main body, B ... main body part, C ... container lid, C1 ... through hole, D ... locked part, P ... sealed body, S ... internal space

Claims (3)

It is configured to be attachable to a through-hole formed in a container body having an internal space and communicating the space outside the container body and the internal space,
A gas permeable sheet capable of transmitting the gas in the internal space to the space outside the container body;
A gas permeable member that holds the gas permeable sheet and includes a holding body having a gas flow hole for gas to flow;
The gas permeable member, wherein the holding body is configured to be detachable with respect to the through hole of the container body.   The gas permeable member according to claim 1, wherein the holding body is configured to be screwable with a through hole of the container body. The gas permeable member according to claim 1 or 2,
A breathable container comprising: a container main body having a through hole in which a holding body of the gas permeable member is detachably provided.

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