JP2019185925A - Pressure control valve and power storage module - Google Patents

Abstract

Provided is a pressure regulating valve that suppresses leakage of an electrolytic solution to the outside. The pressure control valve is a pressure control valve connected to an opening that communicates between the inside and the outside of the power storage module, wherein the communication port is connected to the opening and communicates with the inside; (A case member 61, a cover member 63) including an internal space SP provided with an exhaust port 64 that is disposed to face the device and communicates with the outside, and the communication port 62 is closed in the internal space SP of the case body. , A waterproof ventilation filter 69 disposed between the valve body 65 and the exhaust port 64 so as to cover the entire exhaust port 64, and a waterproof ventilation filter having a peripheral edge of the exhaust port 64 over the entire circumference. And a pressing surface 67c for pressing the waterproof ventilation filter 69 toward the exhaust port 64 by the elastic force of the valve body 65 so as to be in close contact with the valve body 65. The valve body 65 extends from the communication port 62 to the internal space SP. If the pressure of the constant is applied, to open the communication port 62. [Selection diagram] FIG.

Description

  One aspect of the present invention relates to a pressure regulating valve and a power storage module.

  2. Description of the Related Art Conventionally, a power storage module including a stacked body in which a plurality of electrode plates is stacked is known. For example, in the power storage module disclosed in Patent Document 1, a seal portion that seals between electrode plates adjacent in the stacking direction is provided, and an electrolytic solution is sealed in a space formed between the electrode plates. Yes.

JP 2010-287451 A

  The power storage module as described above may be provided with a pressure adjustment valve for adjusting the pressure in the space formed between the electrode plates. The pressure regulating valve opens when the pressure in the space between the electrode plates increases, and releases the gas in the space. Such a pressure regulating valve can be connected to, for example, a seal portion in order to communicate the inside and outside of the space between the electrode plates. However, when the power storage module is arranged with the stacking direction of the stacked body as the vertical direction, the electrolyte may leak out together with the gas in the space when the pressure regulating valve is opened.

  An object of one aspect of the present invention is to provide a pressure regulating valve and a power storage module that suppress leakage of an electrolyte solution to the outside.

  A pressure regulating valve according to one aspect of the present invention is a pressure regulating valve connected to an opening that communicates between the inside and the outside of a power storage module, and is connected to the opening and communicates with the inside, and a communication port A case body including an internal space provided with an exhaust port that is disposed to face and communicate with the outside, an elastic member that is disposed so as to close the communication port in the internal space of the case body, an elastic member, and an exhaust port The waterproof ventilation filter is arranged so as to cover the entire exhaust port, and the waterproof ventilation filter is directed to the exhaust port by the elastic force of the elastic member so that the periphery of the exhaust port is in close contact with the waterproof ventilation filter over the entire circumference. The elastic member opens the communication port when a predetermined pressure is applied from the communication port to the internal space.

  A power storage module according to one aspect of the present invention includes a stacked body in which a plurality of electrode plates are stacked, and an opening that holds an edge of the plurality of electrode plates and communicates with a space between adjacent electrode plates in the stacked body. A frame body provided, and the pressure regulating valve connected to the opening.

  In the pressure regulating valve described above, the elastic member and the waterproof ventilation filter are disposed in the internal space of the case body. The elastic member is disposed so as to close the communication port. When the pressure from the communication port becomes a certain level or more, the elastic member is pushed into the internal space by the pressure. As a result, the gas is discharged into the internal space. The exhaust port is entirely covered with a waterproof ventilation filter. The waterproof ventilation filter is pressed toward the exhaust port by the pressing surface, and is in close contact with the periphery of the exhaust port. That is, in order to go from the internal space to the outside through the exhaust port, it passes through the waterproof ventilation filter. Therefore, even if the electrolyte is discharged together with the gas, the electrolyte does not pass through the waterproof ventilation filter. Therefore, leakage of the electrolytic solution to the outside is suppressed.

  A first protrusion that surrounds the communication opening over the entire circumference and protrudes toward the inner space may be formed on the periphery of the communication opening, and the elastic member may be in contact with the first protrusion. In this configuration, the first protruding portion bites into the elastic member side, so that the space between the elastic member and the communication port is easily sealed.

  A second protrusion that surrounds the exhaust outlet over the entire periphery and protrudes toward the inner space is formed at the periphery of the exhaust outlet, and the waterproof ventilation filter may be in close contact with the second protrusion. In this configuration, when the force concentrates on the second protrusion, the second protrusion can be easily brought into close contact with the waterproof ventilation filter.

  Between the elastic member and the waterproof ventilation filter, a spacer member in which a communication path that connects the pressing surface, the exhaust port, and the internal space is formed may be disposed. In this configuration, the spacer member is pressed toward the waterproof ventilation filter by the elastic force of the elastic member. The exhaust port and the internal space are communicated with each other through a communication passage through a waterproof ventilation filter. Therefore, the gas discharged into the internal space can be discharged outside through the communication path.

  The spacer member includes a cylindrical main body, the end surface on one side in the axial direction of the main body is a pressing surface, and a communication portion that communicates the inside and outside of the main body is formed on the peripheral wall of the main body. The communication path may be formed by the portion and the inner portion of the main body. By using such a spacer member, a structure having the pressing surface and the communication path at the same time can be easily realized.

  According to one aspect of the present invention, it is possible to provide a pressure regulating valve and a power storage module that prevent the electrolyte from leaking to the outside.

It is a schematic sectional drawing which shows one Embodiment of an electrical storage apparatus provided with an electrical storage module. It is a schematic sectional drawing which shows the electrical storage module which comprises the electrical storage apparatus of FIG. It is a schematic sectional drawing which shows a pressure regulating valve. It is a disassembled perspective view which shows an elastic member, a spacer, and a waterproof ventilation filter. It is a perspective view which shows the electrical storage module which concerns on other embodiment. It is a disassembled perspective view of the pressure regulation valve connected to opening of a frame. It is the schematic which shows each opening of a frame. It is a schematic sectional drawing which shows the structure of a pressure regulating valve. It is a figure which shows the side surface by the side of the (A) frame body opening side and (B) case member side of a base member. It is a disassembled perspective view which shows the side surface by the side of the base member of a case member. It is a figure which shows the side surface by the side of the (A) base member side and (B) cover member side of a case member.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used for the same or equivalent elements, and redundant descriptions are omitted. In the drawing, an XYZ orthogonal coordinate system is shown.

[First Embodiment]
FIG. 1 is a schematic cross-sectional view illustrating an embodiment of a power storage device including a power storage module. The power storage device 10 shown in the figure is used as a battery for various vehicles such as forklifts, hybrid vehicles, and electric vehicles. The power storage device 10 includes a plurality (three in the present embodiment) of power storage modules 12, but may include a single power storage module 12. The power storage module 12 is, for example, a bipolar battery. The power storage module 12 is a secondary battery such as a nickel hydride secondary battery or a lithium ion secondary battery, but may be an electric double layer capacitor. In the following description, a nickel metal hydride secondary battery is illustrated.

  The plurality of power storage modules 12 can be stacked via a conductive plate 14 such as a metal plate. As viewed from the stacking direction D1, the power storage module 12 and the conductive plate 14 have, for example, a rectangular shape. Details of each power storage module 12 will be described later. The conductive plates 14 are also arranged outside the power storage modules 12 positioned at both ends in the stacking direction D1 (Z direction) of the power storage modules 12, respectively. The conductive plate 14 is electrically connected to the adjacent power storage module 12. Thereby, the some electrical storage module 12 is connected in series in the lamination direction D1. In the stacking direction D1, a positive electrode terminal 24 is connected to the conductive plate 14 located at one end, and a negative electrode terminal 26 is connected to the conductive plate 14 located at the other end. The positive terminal 24 may be integrated with the conductive plate 14 to be connected. The negative electrode terminal 26 may be integrated with the conductive plate 14 to be connected. The positive electrode terminal 24 and the negative electrode terminal 26 extend in a direction (X direction) intersecting the stacking direction D1. The positive and negative terminals 24 and 26 can charge and discharge the power storage device 10.

  The conductive plate 14 can also function as a heat radiating plate for releasing heat generated in the power storage module 12. When a refrigerant such as air passes through the plurality of gaps 14a provided inside the conductive plate 14, heat from the power storage module 12 can be efficiently released to the outside. Each gap 14a extends, for example, in a direction (Y direction) intersecting the stacking direction D1. As viewed from the stacking direction D1, the conductive plate 14 is smaller than the power storage module 12, but may be the same as or larger than the power storage module 12.

  The power storage device 10 may include a restraining member 16 that restrains the alternately stacked power storage modules 12 and conductive plates 14 in the stacking direction D1. The restraining member 16 includes a pair of restraining plates 16A and 16B and a connecting member (bolt 18 and nut 20) for joining the restraining plates 16A and 16B to each other. An insulating film 22 such as a resin film is disposed between the restraining plates 16A and 16B and the conductive plate. Each restraint plate 16A, 16B is comprised, for example with metals, such as iron. When viewed from the stacking direction D1, each of the restraining plates 16A and 16B and the insulating film 22 has, for example, a rectangular shape. The insulating film 22 is larger than the conductive plate 14, and the restraining plates 16 </ b> A and 16 </ b> B are larger than the power storage module 12. As viewed from the stacking direction D1, an insertion hole H1 through which the shaft portion of the bolt 18 is inserted is provided at a position on the outer side of the power storage module 12 at the edge portion of the restraint plate 16A. Similarly, an insertion hole H2 through which the shaft portion of the bolt 18 is inserted is provided at a position on the outer side of the power storage module 12 at the edge portion of the restraining plate 16B when viewed from the stacking direction D1. When each restraint plate 16A, 16B has a rectangular shape when viewed from the stacking direction D1, the insertion hole H1 and the insertion hole H2 are located at the corners of the restraint plates 16A, 16B.

  One constraining plate 16A is abutted against the conductive plate 14 connected to the negative terminal 26 via the insulating film 22, and the other constraining plate 16B has the insulating film 22 applied to the conductive plate 14 connected to the positive terminal 24. Has been hit through. For example, the bolt 18 is passed through the insertion hole H1 from one restraint plate 16A side to the other restraint plate 16B side, and a nut 20 is screwed to the tip of the bolt 18 protruding from the other restraint plate 16B. Yes. Thereby, the insulating film 22, the conductive plate 14, and the power storage module 12 are sandwiched and unitized, and a restraining load is applied in the stacking direction D1.

  2 is a schematic cross-sectional view showing a power storage module constituting the power storage device of FIG. The power storage module 12 shown in the figure includes a stacked body 30 in which a plurality of bipolar electrodes (electrodes) 32 are stacked. The laminated body 30 has, for example, a rectangular shape when viewed from the lamination direction D1 of the bipolar electrode 32. A separator 40 may be disposed between the adjacent bipolar electrodes 32. The bipolar electrode 32 includes an electrode plate 34, a positive electrode 36 provided on one surface of the electrode plate 34, and a negative electrode 38 provided on the other surface of the electrode plate 34. In the stacked body 30, the positive electrode 36 of one bipolar electrode 32 faces the negative electrode 38 of one bipolar electrode 32 adjacent in the stacking direction D <b> 1 with the separator 40 interposed therebetween. The negative electrode 38 of one bipolar electrode 32 faces the positive electrode 36 of the other bipolar electrode 32 adjacent in the stacking direction D1 with the separator 40 interposed therebetween. In the stacking direction D1, an electrode plate 34 (negative electrode termination electrode) having a negative electrode 38 disposed on the inner surface is disposed at one end of the stacked body 30, and a positive electrode 36 is disposed on the inner surface at the other end of the stacked body 30. The disposed electrode plate 34 (positive terminal electrode) is disposed. The negative electrode 38 of the negative electrode-side termination electrode faces the positive electrode 36 of the uppermost bipolar electrode 32 with the separator 40 interposed therebetween. The positive electrode 36 of the positive terminal electrode is opposed to the negative electrode 38 of the lowermost bipolar electrode 32 with the separator 40 interposed therebetween. The electrode plates 34 of these termination electrodes are connected to the adjacent conductive plates 14 (see FIG. 1).

  The power storage module 12 includes a frame 50 that holds the edge 34a of the electrode plate 34 on the side surface 30a of the stacked body 30 extending in the stacking direction D1. The frame body 50 is provided around the stacked body 30 when viewed from the stacking direction D1. That is, the frame body 50 is configured to surround the side surface 30 a of the stacked body 30. The frame 50 can include a first resin portion 52 that holds the edge portion 34a of the electrode plate 34, and a second resin portion 54 that is provided around the first resin portion 52 when viewed from the stacking direction D1.

  The first resin portion 52 constituting the inner wall of the frame 50 is provided from one surface (surface on which the positive electrode 36 is formed) of the electrode plate 34 of each bipolar electrode 32 to the end surface of the electrode plate 34 at the edge portion 34a. . As viewed from the stacking direction D1, each first resin portion 52 is provided over the entire circumference of the edge portion 34a of the electrode plate 34 of each bipolar electrode 32. Adjacent first resin portions 52 are in contact with each other on the surface extending outside the other surface (surface on which the negative electrode 38 is formed) of the electrode plate 34 of each bipolar electrode 32. As a result, the edge portion 34 a of the electrode plate 34 of each bipolar electrode 32 is buried and held in the first resin portion 52. Similarly to the edge portion 34 a of the electrode plate 34 of each bipolar electrode 32, the edge portions 34 a of the electrode plates 34 disposed at both ends of the laminated body 30 are also held in a state of being buried in the first resin portion 52. As a result, a space V that is airtightly partitioned by the electrode plates 34 and 34 and the first resin portion 52 is formed between the electrode plates 34 and 34 adjacent in the stacking direction D1. In the space V, an electrolytic solution (not shown) made of an alkaline solution such as an aqueous potassium hydroxide solution is accommodated.

  The 2nd resin part 54 which comprises the outer wall of the frame 50 is a cylindrical part extended about the lamination direction D1 as an axial direction. The second resin portion 54 extends over the entire length of the stacked body 30 in the stacking direction D1. The second resin portion 54 covers the outer surface of the first resin portion 52 extending in the stacking direction D1. The second resin portion 54 is welded to the first resin portion 52 on the inner side when viewed from the stacking direction D1.

  The electrode plate 34 is a rectangular metal foil made of nickel, for example. The edge 34a of the electrode plate 34 is an uncoated region where the positive electrode active material and the negative electrode active material are not coated. The uncoated region is a region that is buried and held in the first resin portion 52 that forms the inner wall of the frame 50. An example of the positive electrode active material constituting the positive electrode 36 is nickel hydroxide. Examples of the negative electrode active material constituting the negative electrode 38 include a hydrogen storage alloy. The formation region of the negative electrode 38 on the other surface of the electrode plate 34 is slightly larger than the formation region of the positive electrode 36 on one surface of the electrode plate 34.

  The separator 40 is formed in a sheet shape, for example. Examples of the material forming the separator 40 include a porous film made of a polyolefin resin such as polyethylene (PE) and polypropylene (PP), and a woven fabric or a nonwoven fabric made of polypropylene. The separator 40 may be reinforced with a vinylidene fluoride resin compound or the like.

  The frame 50 (the first resin portion 52 and the second resin portion 54) is formed in a rectangular cylindrical shape by, for example, injection molding using an insulating resin. Examples of the resin material constituting the frame 50 include polypropylene (PP), polyphenylene sulfide (PPS), and modified polyphenylene ether (modified PPE). The frame 50 of the power storage module 12 has a side surface 50s extending in the stacking direction D1. The side surface 50s is a surface located outside as viewed from the stacking direction D1. Therefore, the second resin portion 54 has the side surface 50 s of the frame body 50.

  FIG. 3 is a schematic cross-sectional view showing the pressure regulating valve connected to the frame. FIG. 4 is an exploded perspective view showing the valve body, the spacer member, and the waterproof ventilation filter. FIG. 3 shows one pressure regulating valve 60 connected to a space V formed between a pair of electrode plates 34 adjacent in the stacking direction D1. The power storage module 12 has a plurality of spaces V formed by a plurality of electrode plates 34. Therefore, the pressure regulating valve 60 can be connected to each of the plurality of spaces V. As shown in FIG. 3, the pressure regulating valve 60 is connected to an opening 50 a formed in the frame body 50. The opening 50a is a through-hole penetrating the frame body 50, and communicates with the space V (inside) between the adjacent electrode plates 34 and the external space. The opening 50a functions as a liquid injection port for injecting an electrolytic solution into each space V, and also functions as a connection port for the pressure regulating valve 60 after the electrolytic solution is injected. The pressure regulating valve 60 includes a case member (case body) 61, a cover member (case body) 63, a valve body (elastic member) 65, a spacer member 67, and a waterproof ventilation filter 69.

  The case member 61 includes an internal space SP provided with a communication port 62 connected to the opening 50a. For example, the case member 61 has a peripheral wall 61a and a side wall 61b. The peripheral wall 61a has a cylindrical shape having a uniform diameter in the axial direction. In the present embodiment, the inner side of the peripheral wall 61a constitutes the internal space SP. The side wall 61b is formed at one end of the peripheral wall 61a in the axial direction of the peripheral wall 61a. In the illustrated example, a side wall 61b is formed on the side facing the frame 50 in the axial direction. A communication port 62 that penetrates the side wall 61b in the axial direction is formed at the center of the side wall 61b. The communication port 62 communicates the internal space SP of the case member 61 with the external space. In a state where the pressure regulating valve 60 is fixed to the frame body 50, the opening 50a of the frame body 50 and the communication port 62 are connected. That is, the communication port 62 and the space V communicate with each other.

  A first projecting portion 61 d is formed on the periphery of the communication port 62. The first projecting portion 61d has, for example, an annular shape, and surrounds the communication port 62 around the entire circumference in the wall surface 61c on the inner space side of the side wall 61b. On the wall surface 61c of the side wall 61b, the first protrusion 61d protrudes toward the internal space.

  The cover member 63 is joined to the other end of the peripheral wall 61a so as to close the other end of the peripheral wall 61a of the case member 61. The cover member 63 has, for example, a circular plate shape. An exhaust port 64 that penetrates the cover member 63 in the thickness direction is provided at the center of the cover member 63. In a state where the cover member 63 is joined to the case member 61, the internal space SP of the case member 61 and the space outside the case member 61 can be communicated only by the communication port 62 and the exhaust port 64. The communication port 62 and the exhaust port 64 are provided at positions facing each other.

  The case member 61 and the cover member 63 are made of, for example, polypropylene (PP), polyphenylene sulfide (PPS), modified polyphenylene ether (modified PPE), or the like. The method for joining the cover member 63 to the case member 61 is not particularly limited, and for example, laser welding, hot plate welding, and fastening using a fastening member such as a bolt can be used.

  A second protrusion 63 b is formed on the periphery of the exhaust port 64. The second protrusion 63b has, for example, an annular shape, and surrounds the entire periphery of the exhaust port 64 on the side surface 63a on the inner space side of the cover member 63. On the side surface 63a of the cover member 63, the second protrusion 63b protrudes toward the internal space.

  The valve body 65 has a cylindrical shape with a uniform diameter in the axial direction. The valve body 65 is made of an elastic material such as rubber and has elasticity. The valve body 65 has a diameter smaller than the inner diameter of the peripheral wall 61 a of the case member 61.

  The waterproof ventilation filter 69 is a filter that allows gas to pass without passing liquid. That is, the waterproof ventilation filter 69 allows only the generated gas to pass without passing the electrolyte. The waterproof ventilation filter 69 has a circular shape, for example. As an example, the waterproof ventilation filter 69 has a diameter that is at least larger than that of the exhaust port 64. In the present embodiment, the waterproof ventilation filter 69 has a larger diameter than the outer diameter of the second protrusion 63b.

  The spacer member 67 includes a main body portion 67a having a cylindrical shape. For example, the inner diameter of the main body 67a is smaller than the inner diameter of the second protrusion 63b. The outer diameter of the main body 67a is larger than the outer diameter of the second protrusion 63b. As an example, the outer diameter of the main body 67a may be the same as the diameter of the valve body 65. The peripheral wall 67b of the main body portion 67a is formed with a communication portion 67d that communicates the inside and outside of the main body portion 67a. In the present embodiment, the plurality of communication portions 67d are evenly arranged in the circumferential direction. The spacer member 67 is made of, for example, polypropylene (PP), polyphenylene sulfide (PPS), modified polyphenylene ether (modified PPE), or the like.

  In the state where the cover member 63 is joined to the case member 61, the valve body 65, the spacer member 67, and the waterproof ventilation filter 69 are accommodated in the internal space SP. In this state, the cover member 63 presses the valve body 65 toward the communication port 62 so that the communication port 62 is closed by the valve body 65. That is, the valve body 65 is disposed so as to close the communication port 62. Since the valve body 65 is made of an elastic material, it is compressed in the axial direction. In the axial direction, one side surface 65a of the valve body 65 is in contact with the first protrusion 61d. The compression rate of the valve body 65 is adjusted in advance. Therefore, when the pressure in the space V between the electrode plates 34 is equal to or higher than the set value, the blockage of the communication port 62 by the valve body 65 is released. In the valve body 65, the other side surface 65 b in the axial direction is in contact with the spacer member 67. A gap G is formed between the side surface 65c of the valve body 65 and the inner surface of the peripheral wall 61a.

  The waterproof ventilation filter 69 is disposed between the valve body 65 and the cover member 63 so as to cover the entire exhaust port 64. In the illustrated example, the waterproof ventilation filter 69 and the spacer member 67 are disposed between the valve body 65 and the cover member 63. The spacer member 67 is disposed between the valve body 65 and the waterproof ventilation filter 69. The spacer member 67 and the waterproof ventilation filter 69 are pressed toward the cover member 63 by the elastic force of the valve body 65. In this case, the end face on one axial side of the main body 67a constitutes a pressing surface 67c that presses the waterproof ventilation filter 69. The pressing surface 67c presses the waterproof ventilation filter 69 toward the cover member 63 (second protruding portion 63b) so that the periphery of the exhaust port 64 is in close contact with the waterproof ventilation filter 69 over the entire circumference. The waterproof ventilation filter 69 is sandwiched between the spacer member 67 and the second protrusion 63b in an annular shape.

  In the present embodiment, a communication passage 68 that connects the exhaust port 64 and the internal space SP through the waterproof ventilation filter 69 is configured by the inner portion 67e of the main body 67a and the communication portion 67d of the spacer member 67.

  In the pressure regulating valve 60 described above, the valve body 65 and the waterproof ventilation filter 69 are disposed in the internal space SP of the case member 61. The valve body 65 is pressed against the communication port 62 by the cover member 63, thereby closing the communication port 62. When the pressure in the space V between the electrode plates 34 becomes a certain level or more, a part of the valve body 65 (specifically, a portion closing the communication port 62 and its peripheral portion) is deformed so as to be separated from the communication port 62. As a result, the gas is discharged into the internal space SP. When the pressure in the space V decreases due to the discharge of gas, the communication port 62 is closed again by the valve body 65.

  The exhaust port 64 formed in the cover member 63 is covered with a waterproof ventilation filter 69. Further, the exhaust port 64 and the internal space SP are communicated with each other by a communication passage 68 through a waterproof ventilation filter 69. Therefore, the gas discharged to the internal space SP can be discharged to the outside through the communication path 68. The waterproof breathable filter 69 is pressed toward the cover member 63 by the pressing surface 67c, and is in close contact with the peripheral edge of the exhaust port 64 (the second protruding portion 63b in the illustrated example). That is, in order to go to the outside from the internal space SP through the exhaust port 64, the waterproof air-permeable filter 69 must be passed. Since the electrolytic solution cannot pass through the waterproof ventilation filter 69, even if the electrolytic solution is discharged together with the gas from the communication port 62, the electrolytic solution is prevented from leaking to the outside from the exhaust port 64.

  On the periphery of the communication port 62, a first projecting portion 61d that surrounds the communication port 62 over the entire circumference and projects toward the internal space SP is formed. The valve body 65 is in contact with the first protrusion 61d. In this configuration, the first projecting portion 61d bites into the valve body 65, so that the space between the valve body 65 and the communication port 62 is easily sealed.

  On the periphery of the exhaust port 64, a second projecting portion 63b that surrounds the exhaust port 64 over the entire circumference and projects toward the internal space SP is formed. The waterproof ventilation filter 69 is in close contact with the second protrusion 63b. In this configuration, when the force concentrates on the second protrusion 63b, the second protrusion 63b and the waterproof ventilation filter 69 can be more easily brought into close contact with each other.

  Between the valve body 65 and the waterproof ventilation filter 69, a spacer member 67 having a pressing surface 67c and a communication path 68 is disposed. By using the spacer member 67, a structure having the pressing surface and the communication path at the same time can be easily realized.

[Second Embodiment]
The present embodiment is different from the first embodiment in that one pressure regulating valve includes a plurality of valve bodies. Hereinafter, points different from the first embodiment will be mainly described, and the same elements and members will be denoted by the same reference numerals and detailed description thereof will be omitted.

  FIG. 5 is a schematic perspective view showing the power storage module 12. FIG. 6 is an exploded perspective view of the pressure regulating valve 160 connected to the opening 50 a of the frame 50. There are a plurality (four here) of one side surface 50s (here, one side surface 50s facing the longitudinal direction (X direction) of the frame body 50) forming one side of the frame body 50 when viewed from the stacking direction D1. Openings 50a (openings 50a1 to 50a4) are provided.

  As shown in FIG. 6, one opening 50 a includes a first opening 52 a provided in the first resin portion 52 and a second opening 54 a provided in the second resin portion 54. Each first opening 52 a communicates with the space V between adjacent bipolar electrodes 32. The first resin part 52 is provided with a plurality (six in this case) of first openings 52a, and the second resin part 54 is a single second opening that extends so as to cover the plurality of first openings 52a. 54a is provided. The first opening 52 a may be provided in each first resin portion 52, or may be provided between adjacent first resin portions 52. Each of the first openings 52a and the second openings 54a has a rectangular shape, for example. In the present embodiment, a notch 54b for allowing the base member 70 of the pressure regulating valve 160 to enter is formed above the second opening 54a.

  FIG. 7 is a view showing the openings 50a1 to 50a4 (viewed from the X direction). In FIG. 7, illustration of the second resin portion 54 around the first resin portion 52 is omitted. In the present embodiment, 24 spaces V are formed in the power storage module 12, and one opening 50a communicates with six spaces V whose height positions in the stacking direction D1 are shifted by four steps. . Each space V communicates with any one of the four openings 50a1 to 50a4. As shown in FIG. 7, six first openings 52 a are arranged in two rows in the short direction (Y direction) of the frame body 50 in one opening 50 a. In each row, three first openings 52a are arranged along the stacking direction D1 (Z direction).

  For example, the arrangement of the first openings 52a in each opening 50a can be configured to shift the set of the communicating spaces V by one stage. In the following description, for convenience, in order to identify the 24 spaces V, the spaces V1 to V24 are sequentially arranged from the other end (the lower side in the drawing in FIG. 2) to the one end (the upper side in the drawing in FIG. 2). Is written.

  As shown in FIG. 7A, first openings 52a4, 52a12, 52a20 communicating with the spaces V4, V12, V20 are provided in the first row of openings 50a1 (the column on the left side in the drawing, the same applies hereinafter). It has been. First openings 52a8, 52a16, and 52a24 communicating with the spaces V8, V16, and V24 are provided in the second row of the openings 50a1 (the right-hand column in the drawing, the same applies hereinafter).

  As shown in FIG. 7B, the first row of openings 50a2 is provided with first openings 52a3, 52a11, and 52a19 communicating with the spaces V3, V11, and V19. In the second row of the openings 50a2, first openings 52a7, 52a15, and 52a23 communicating with the spaces V7, V15, and V23 are provided.

  As shown in FIG. 7C, the first row of openings 50a3 is provided with first openings 52a2, 52a10, 52a18 communicating with the spaces V2, V10, V18. In the second row of openings 50a3, first openings 52a6, 52a14, 52a22 communicating with the spaces V6, V14, V22 are provided.

  As shown in FIG. 7D, the first row of openings 50a4 is provided with first openings 52a1, 52a9, 52a17 communicating with the spaces V1, V9, V17. In the second row of the openings 50a4, first openings 52a5, 52a13, 52a21 communicating with the spaces V5, V13, V21 are provided.

  According to the arrangement of the first openings 52a as described above (that is, the correspondence between the first openings 52a1 to 52a24 and the spaces V1 to V24), a configuration in which all the spaces V communicate with the first openings 52a different from each other is realized. Is done.

  Next, the configuration of the pressure regulating valve 160 connected to the opening 50a of the frame 50 will be described with reference to FIGS. 6 and 8 to 11. FIG. 8 is a schematic cross-sectional view showing the configuration of the pressure regulating valve 160. FIG. 8 is a cross-sectional view including a cross section of a communication path (a communication path formed by the first opening 52a12, the first communication port 74, and the second communication port 84) corresponding to the space V12. 6 and 8, the pressure regulating valve 160 includes a base member 70, a case member 80, a plurality of (here, six) valve bodies 65, spacer members 67, and a waterproof ventilation filter 69. And a cover member 100.

  The base member 70 has a substantially rectangular parallelepiped outer shape, and is formed of, for example, polypropylene (PP), polyphenylene sulfide (PPS), modified polyphenylene ether (modified PPE), or the like. The base member 70 is connected to the opening 50a. When viewed from the X direction, the lower surface and both side surfaces of the base member 70 are positioned by the second opening 54a. The base member 70 is fixed to the opening 50a by, for example, welding part or all of the contact portion between the side surface 71 and the first resin portion 52. The side surface 71 and the first resin portion 52 are welded by, for example, hot plate welding, laser transmission welding, ultrasonic welding, or the like.

  9A is a plan view showing the side surface 71, and FIG. 9B is a plan view showing the side surface 72 (first side surface) of the base member 70. The side surface 72 is a side surface opposite to the opening 50 a and faces the case member 80. As shown in FIGS. 8 and 9, the base member 70 is provided with a plurality (six in this case) of first communication ports 73 to 78 penetrating from the side surface 71 to the side surface 72. The first communication ports 73 to 78 are communication ports that communicate with the first openings 52a4, 52a12, 52a20, 52a24, 52a16, and 52a8. The configuration of the first communication ports 76 to 78 is the same as the configuration of the first communication ports 73 to 75. Specifically, the first communication ports 76 to 78 are configured symmetrically with the first communication ports 73 to 75 with respect to an axis A that passes through the centers of the side surfaces 71 and 72 and is orthogonal to the side surfaces 71 and 72. . Therefore, below, the first communication ports 73 to 75 will be described, and the description of the first communication ports 76 to 78 will be omitted.

  The first communication port 74 located in the middle stage is formed in a rectangular parallelepiped shape extending along the X direction.

  The first communication port 73 located in the lower stage has a rectangular parallelepiped communication portion 73b extending along the X direction and a tapered shape in which the vertical width (width in the Z direction) increases toward the case member 80 along the X direction. And a tapered portion 73c formed on the surface. The taper part 73c is provided so that the space | interval between the 1st communicating ports 73 and 74 may become small as it goes to the case member 80 along the X direction. The communication portion 73b forms a section from the opening end 73a on the opening 50a side of the first communication port 73 to the midway position of the first communication port 73, and the taper portion 73c extends from the midway position to the first communication port 73. The section to the opening end 73d on the case member 80 side is formed. The taper portion 73c plays a role of position adjustment for communicating the first communication port 73 and the second communication port 83 provided in the case member 80.

  The first communication port 75 located in the upper stage has a rectangular parallelepiped communication portion 75b extending along the X direction and a tapered shape in which the vertical width (width in the Z direction) increases toward the case member 80 along the X direction. And a tapered portion 75c formed on the surface. The taper part 75c is provided so that the space | interval between the 1st communicating ports 74 and 75 becomes small as it goes to the case member 80 along a X direction. The communication portion 75b forms a section from the opening end 75a of the first communication port 75 on the opening 50a side to the midway position of the first communication port 75, and the taper portion 75c extends from the midway position to the first communication port 75. The section to the opening end 75d on the case member 80 side is formed. The tapered portion 75c plays a role of position adjustment for communicating the first communication port 75 and the second communication port 85 provided in the case member 80.

  The opening ends 73a to 75a of the first communication ports 73 to 75 are formed in a size including the first openings 52a4, 52a12, and 52a20 when viewed from the X direction. The vertical widths d1 of the open ends 73a to 75a are all the same.

  The arrangement of the six first openings 52a in the openings 50a1 to 50a4 is shifted by one step as described above. For this reason, in order to use the pressure regulation valve 160 of the same standard (common shape) for all the openings 50a1 to 50a4, when the base member 70 of the pressure regulation valve 160 is connected to which opening 50a1 to 50a4. In addition, the first communication ports 73 to 78 need to communicate with the corresponding first openings 52a. For example, the first communication port 73 of the base member 70 communicates with the first opening 52a4. However, when the base member 70 is connected to the opening 50a2, it is necessary to communicate with the first opening 52a3. When the base member 70 is connected to the opening 50a3, it is necessary to communicate with the first opening 52a2, and when the base member 70 is connected to the opening 50a4, it is necessary to communicate with the first opening 52a1.

  Therefore, in the present embodiment, the vertical width d1 of the opening ends 73a to 75a is the product of the width of one structure repeated in the stacked body 30 (that is, the above-described shift width of one step) and the number of openings 50a. It is set to the value or higher. In the present embodiment, the width of one structure repeated in the stacked body 30 is the width d2 (see FIG. 2) in the stacking direction D1 of the portion where one electrode plate 34 and one space V are combined. That is, in the present embodiment, the relationship “d1 ≧ d2 × 4” is established. Thereby, even when the base member 70 is connected to any of the openings 50a1 to 50a4, the corresponding first openings 52a are accommodated inside the opening ends 73a to 75a when viewed from the X direction. As a result, the same base member 70 (that is, the same pressure regulating valve 160) can be used for any of the openings 50a1 to 50a4. Thereby, the kind of member required can be reduced. Further, since it is not necessary to use a pressure regulating valve 160 having a different standard for each opening 50a, it is possible to prevent the occurrence of erroneous assembly such as connecting a pressure regulating valve 160 having a standard that does not conform to the opening 50a. .

  Further, as shown in FIG. 9A, the plurality of opening ends 73 a to 78 a (first opening ends) are arranged point-symmetrically with respect to an axis A passing through the center of the side surface 71 and orthogonal to the side surface 71. Has been. According to this configuration, in any of the two states (postures) of the base member 70 that are reversed with respect to the axis A, the positional relationship of the plurality of opening ends with respect to the opening 50a is the same. For this reason, the base member 70 can be normally connected to the opening 50a in any of the two states. Specifically, the base member 70 can be connected to the opening 50a1 even if the base member 70 is reversed (rotated 180 degrees) from the state shown in FIG. . For example, the first communication port 73 communicating with the first opening 52a4 communicates with the first opening 52a24 in the state after the inversion. As a result, the base member 70 can be easily connected to the opening 50a. Further, it is possible to prevent erroneous assembly such that the base member 70 is connected to the opening 50a in an incorrect direction.

  As shown in FIG. 9B, the side surface 72 of the base member 70 has a plurality of first communication ports 73 to 78 as viewed from the connection direction D <b> 2 (that is, the X direction) between the base member 70 and the case member 80. First joining projections 72A and 72B extending along the connection direction D2 are provided so as to partition each of the first and second projections 72A and 72B.

  The first bonding projection 72A includes four wall portions 72A1 erected on the edge extending along the Y direction of each of the rectangular opening ends 73d to 75d, and the Z direction of each of the opening ends 73d to 75d. And two wall portions 72 </ b> A <b> 2 erected on the edge extending along the same. Similarly, the first bonding projection 72B includes four wall portions 72B1 erected on the edges extending along the Y direction of the rectangular opening ends 76d to 78d, and the opening ends 76d to 78d. And two wall portions 72B2 erected on the edge extending along the Z direction.

  In addition, columnar first measurement protrusions 72 </ b> C extending in the connection direction D <b> 2 are provided at the four corners of the side surface 72. The first measurement projection 72C is provided so as not to interfere with second joining projections 81A and 81B and the second measurement projection 81C of the case member 80 described later. That is, the first measurement protrusion 72C is provided at a position that does not overlap with the second bonding protrusions 81A and 81B and the second measurement protrusion 81C when viewed from the connection direction D2.

  The case member 80 is a box-shaped member having a substantially rectangular parallelepiped outer shape, and is formed of, for example, polypropylene (PP), polyphenylene sulfide (PPS), or modified polyphenylene ether (modified PPE). The case member 80 is joined to the side surface 72 of the base member 70 at a side surface 81 (second side surface) corresponding to the bottom surface of the box. FIG. 10 is an exploded perspective view showing the side surface 81 of the case member 80. 11A is a plan view showing the side surface 81, and FIG. 11B is a plan view of the case member 80 viewed from the cover member 100 side.

  As shown in FIGS. 10 and 11, the case member 80 is provided with a plurality of (here, six) second communication ports 83 to 88 that penetrate from the side surface 81 to the inner side surface 82. The second communication ports 83 to 88 are formed in a columnar shape. Each of the second communication ports 83 to 88 communicates with one space V via the corresponding first communication ports 73 to 78.

  As shown in FIG. 10 and FIG. 11A, the side surface 81 of the case member 80 is connected so as to partition each of the plurality of second communication ports 83 to 88 when viewed from the connection direction D2 (X direction). Second joining protrusions 81A and 81B extending along the direction D2 are provided.

  The second joining projections 81A and 81B have shapes corresponding to the first joining projections 72A and 72B, and are provided so as to overlap the first joining projections 72A and 72B when viewed from the connection direction D2. It has been. In other words, the second bonding projection 81A has four wall portions 81A1 corresponding to the four wall portions 72A1 and two wall portions 81A2 corresponding to the two wall portions 72A2. Similarly, the second bonding projection 81B has four wall portions 81B1 corresponding to the four wall portions 72B1 and two wall portions 81B2 corresponding to the two wall portions 72B2.

  In addition, columnar second measurement protrusions 81C extending in the connection direction D2 are provided at the four corners of the side surface 81. The second measurement protrusion 81C is provided so as not to interfere with the first bonding protrusions 72A and 72B and the first measurement protrusion 72C. That is, the second measurement protrusion 81C is provided at a position that does not overlap with the first bonding protrusions 72A and 72B and the first measurement protrusion 72C when viewed from the connection direction D2.

  The base member 70 and the case member 80 are joined to each other by hot plate welding the ends of the first joining projections 72A and 72B and the ends of the second joining projections 81A and 81B. Accordingly, the side surface 72 of the base member 70 and the side surface 81 of the case member 80 are formed by the plurality of first communication ports 73 to 78 and the plurality of second communication ports 83 to 88 as viewed from the connection direction D2. Are connected via a partition wall W extending along the connection direction D2 so as to partition each of the communication paths. The partition wall W is a wall portion formed so as to connect the side surface 72 and the side surface 81 by hot plate welding of the first bonding projections 72A and 72B and the second bonding projections 81A and 81B. It is.

  In the hot plate welding, the hot plate is pressed so as to be parallel to the ends of the first joining projections 72A and 72B. At this time, the end of the first measurement projection 72C is similarly pressed against the end of the first measurement projection 72C, so that the end of the first measurement projection 72C is solidified after being melted by the hot plate welding. It has become. Similarly, in the hot plate welding, the hot plate is pressed so as to be parallel to the end portions of the second bonding projections 81A and 81B. At this time, the end of the second measurement projection 81C is similarly pressed against the end of the second measurement projection 81C, so that the end of the second measurement projection 81C is solidified after being melted by the hot plate welding. It has become.

  As shown in FIG. 9B and FIG. 11A, a plurality of opening ends 73 d to 78 d provided on the side surface 72 of the base member 70 and a plurality of opening ends 73 d to 78 d provided on the side surface 81 of the case member 80. All of the open ends 83 a to 88 a are arranged point-symmetrically with respect to the axis A. Further, the first joining protrusions 72A and 72B and the second joining protrusions 81A and 81B are also arranged point-symmetrically with respect to the axis A. On the other hand, the first measurement protrusion 72C and the second measurement protrusion 81C are arranged so as not to be point-symmetric with respect to the axis A. As shown in FIG. 9B, in the present embodiment, the first measurement protrusions 72C are provided at the four corners of the side surface 72 at the edge (short side) along the Z-axis direction. . On the other hand, as shown in FIG. 11A, in the present embodiment, the second measurement protrusions 81C are provided at the four corners of the side surface 81 at the edge (long side) along the Y-axis direction. ing. Thus, the first measurement protrusion 72C and the second measurement protrusion 81C can be connected in the connection direction D2 even if the case member 80 is turned upside down (rotated 180 degrees around the axis A) with respect to the base member 70. Are arranged so as not to overlap each other.

  As shown in FIG. 6 and FIG. 11B, inside the case member 80, there are open ends 83 b to 88 b inside the second communication ports 83 to 88 (on the side opposite to the open ends 83 a to 88 a). A cylindrical portion 89 is provided that encloses each of the two open ends and accommodates the valve body 65 for closing the open ends 83b to 88b. The valve body 65 extends along the connection direction D <b> 2 while being accommodated in the cylindrical portion 89. The cylindrical portion 89 is formed in a substantially cylindrical shape according to the shape of the valve body 65. In the present embodiment, the plurality of cylindrical portions 89 corresponding to each of the plurality of opening ends 83b to 88b are connected to each other (a part is shared with other cylindrical portions 89), but each other It may be separated.

  The inner diameter of the cylindrical portion 89 is larger than the diameter of the valve body 65. In addition, a plurality of protrusions 89 a are formed on the inner side surface of the cylindrical portion 89 so as to contact the side surface 65 c of the valve body 65 and fix the valve body 65 to the cylindrical portion 89. Each protrusion 89a extends along the X direction. A plurality (six in this case) of protrusions 89a are provided at regular intervals (60-degree intervals around the central axis of the cylindrical portion 89) when viewed from the X direction. Since the side surface 65c of the valve body 65 is supported by the six projecting portions 89a, a gap G corresponding to the size of the projecting portion 89a is formed between the side surface 65c of the valve body 65 and the inner surface of the cylindrical portion 89. It is provided stably (see FIG. 8).

  The cover member 100 is a plate-like member joined to the end portion 80b of the case member 80 so as to close the opening 80a of the case member 80. The case member 80 and the cover member 100 are connected to each other so as to form an internal space S in which the plurality of valve bodies 65, the spacer members 67, and the waterproof ventilation filter 69 are accommodated. The cover member 100 also functions as a pressing member that presses the plurality of valve bodies 65 against the case member 80 along the connection direction D2 so as to press the plurality of valve bodies 65 against the respective open ends 83b to 88b. The cover member 100 is made of, for example, polypropylene (PP), polyphenylene sulfide (PPS), or modified polyphenylene ether (modified PPE). A method for joining the cover member 100 to the end portion 80b of the case member 80 is not particularly limited. For example, laser welding, hot plate welding, and fastening using a fastening member such as a bolt can be used.

  Further, the cover member 100 is provided with exhaust ports 101 that penetrate the cover member 100 in the thickness direction at positions corresponding to the plurality of valve bodies 65, respectively. In a state where the cover member 100 is joined to the case member 80, the inside and outside of the internal space S can be communicated only by the second communication ports 83 to 88 and the plurality of exhaust ports 101.

  A second protrusion 102 a is formed on the periphery of the exhaust port 101. The second protrusion 102 a has, for example, an annular shape, and surrounds the entire periphery of the exhaust port 101 on the side surface 102 on the inner space side of the cover member 100. On the side surface 102 of the cover member 100, the second protrusion 102a protrudes toward the internal space.

  In the present embodiment, as in the first embodiment, the spacer member 67 and the waterproof ventilation filter 69 are disposed between the six valve bodies 65 and the cover member 100, respectively. The valve body 65 accommodated in the cylindrical portion 89 is disposed so as to close the open end 84b by being pressed against the cover member 100 via the spacer member 67 and the waterproof ventilation filter 69. As shown in the drawing, the inner side surface 82 has a first protruding portion 82a surrounding the open end 84b over the entire circumference. The 1st protrusion part 82a has comprised the annular | circular shape, and has comprised the shape which rose to the valve body 65 side. Therefore, the side surface 65a on one side of the valve element 65 is in contact with the first protrusion 82a in the axial direction (X direction).

  The waterproof ventilation filter 69 is disposed between the valve body 65 and the cover member 100 so as to cover the entire exhaust port 101. In the illustrated example, the waterproof ventilation filter 69 and the spacer member 67 are disposed between the valve body 65 and the cover member 100. The spacer member 67 is disposed between the valve body 65 and the waterproof ventilation filter 69. The spacer member 67 and the waterproof ventilation filter 69 are pressed toward the cover member 100 by the elastic force of the valve body 65. In this case, the pressing surface 67c presses the waterproof ventilation filter 69 toward the cover member 100 so that the periphery of the exhaust port 101 is in close contact with the waterproof ventilation filter 69 over the entire circumference. The waterproof ventilation filter 69 is sandwiched between the spacer member 67 and the second protrusion 102a in an annular shape.

  Focusing on the open end 84b shown in FIG. 8, the operation of the pressure regulating valve 160 will be described. The second communication port 84 communicates with the corresponding space V12 via the first communication port 74 and the first opening 52a12. The compression rate of the valve body 65 is regulated so that the release of the opening end 84b by the valve body 65 is performed when the pressure in the corresponding space V12 is equal to or higher than a predetermined set value. For this reason, when the pressure in the corresponding space V12 is less than the set value, the closed state in which the opening end 84b is blocked by the valve body 65 is maintained as shown in FIG.

  On the other hand, when the pressure in the space V12 increases and becomes equal to or higher than the set value, a part of the valve body 65 (specifically, a portion that closes the opening end 84b and its peripheral portion) is separated from the opening end 84b. The valve is deformed so that the closed end of the open end 84b is released. As a result, the gas in the space V12 is released from the open end 84b where the blockage is released. Thereafter, when the pressure in the space V12 becomes less than the set value, the valve body 65 returns to the original state. The gas discharged into the internal space S can be discharged to the outside from the exhaust port 101 through any one of the communication paths 68. Similarly to the first embodiment, in order to go from the internal space S to the outside through the exhaust port 101, the waterproof air-permeable filter 69 must be passed. Since the electrolyte cannot pass through the waterproof ventilation filter 69, even if the electrolyte is discharged together with the gas from the opening end 84b, the electrolyte is prevented from leaking out from the exhaust port 101.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment.

  For example, although the spacer member having a cylindrical main body portion and a communication portion formed in the main body portion has been shown, the spacer member may have other shapes. That is, the shape of the spacer member is not limited as long as the spacer member has a function of covering the entire exhaust port with the waterproof ventilation filter in cooperation with the case member and a function as a communication path from the internal space to the exhaust port. . For example, in the above embodiment, the through hole in the peripheral wall constitutes the communication part, but the communication part may be a notch. Moreover, you may add the function similar to a spacer member to a valve body by forming a communicating path in a valve body.

  Moreover, in 2nd Embodiment, although the example of the pressure regulation valve provided with the six spacer members corresponding to six valve bodies and the six waterproof ventilation filters was shown, it is not limited to this. For example, the six spacer members may be one member formed integrally. Similarly, the six waterproof ventilation filters may be one member formed integrally.

  In the second embodiment, the case member 80 is connected to the opening 50a of the frame body 50 via the base member 70. However, the present invention is not limited to this. In the case member 80, the 2nd communicating ports 83-88 should just be connected with the one corresponding space V, respectively, for example, the base member 70 may be abbreviate | omitted.

  DESCRIPTION OF SYMBOLS 12 ... Power storage module, 30 ... Laminated body, 34 ... Electrode plate, 34a ... Edge, 50 ... Frame, 50a, 50a1, 50a2, 50a3, 50a4 ... Opening, 60 ... Pressure regulating valve, 61 ... Case member (case body) , 62 ... Communication port, 63 ... Cover member (case body), 65 ... Valve body (elastic member), 67 ... Spacer member, 67c ... Pressing surface, 68 ... Communication path, 69 ... Waterproof ventilation filter, 80 ... Case member (Case body), 83 to 88 ... second communication port, 100 ... cover member (case body), 160 ... pressure regulating valve, D1 ... stacking direction, V, V1 to V24 ... space.

Claims (6)

A pressure regulating valve connected to an opening communicating the inside and outside of the electricity storage module,
A case body including an internal space provided with a communication port connected to the opening and communicating with the interior, and an exhaust port disposed opposite to the communication port and communicating with the outside;
An elastic member arranged to close the communication port in the internal space of the case body;
A waterproof ventilation filter disposed between the elastic member and the exhaust port so as to cover the entire exhaust port;
A pressing surface that presses the waterproof ventilation filter toward the exhaust port by an elastic force of the elastic member so that a peripheral edge of the exhaust port is in close contact with the waterproof ventilation filter over the entire circumference,
The elastic member is a pressure regulating valve that opens the communication port when a predetermined pressure is applied to the internal space from the communication port. A first protrusion that surrounds the communication port over the entire circumference and protrudes toward the inner space is formed at the periphery of the communication port.
The pressure regulating valve according to claim 1, wherein the elastic member is in contact with the first protrusion. A second projecting portion is formed on the periphery of the exhaust port so as to surround the exhaust port over the entire circumference and project to the inner space side,
The pressure regulating valve according to claim 1 or 2, wherein the waterproof ventilation filter is in close contact with the second projecting portion.   The spacer member in which the communicating path which connects the said press surface and the said exhaust port, and the said interior space is formed is arrange | positioned between the said elastic member and the said waterproof ventilation filter. The pressure regulating valve according to claim 1. The spacer member includes a cylindrical main body,
An end surface on one side in the axial direction of the main body is the pressing surface,
A communication portion that communicates the inside and outside of the main body is formed on the peripheral wall of the main body,
The pressure regulating valve according to claim 4, wherein the communication passage is formed by the communication portion and an inner portion of the main body portion. A laminate in which a plurality of electrode plates are laminated;
A frame body that holds edges of the plurality of electrode plates and is provided with an opening that communicates with a space between the electrode plates adjacent to each other in the stacked body;
An energy storage module comprising: the pressure regulating valve according to any one of claims 1 to 5 connected to the opening.

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