WO2024058126A1 - Appareil d'échappement de gaz pour dispositif de stockage d'énergie - Google Patents

Appareil d'échappement de gaz pour dispositif de stockage d'énergie Download PDF

Info

Publication number
WO2024058126A1
WO2024058126A1 PCT/JP2023/033061 JP2023033061W WO2024058126A1 WO 2024058126 A1 WO2024058126 A1 WO 2024058126A1 JP 2023033061 W JP2023033061 W JP 2023033061W WO 2024058126 A1 WO2024058126 A1 WO 2024058126A1
Authority
WO
WIPO (PCT)
Prior art keywords
pair
guide
elastic piece
base member
cap member
Prior art date
Application number
PCT/JP2023/033061
Other languages
English (en)
Japanese (ja)
Inventor
精彦 飯田
Original Assignee
株式会社パイオラックス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社パイオラックス filed Critical 株式会社パイオラックス
Publication of WO2024058126A1 publication Critical patent/WO2024058126A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/14—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/308—Detachable arrangements, e.g. detachable vent plugs or plug systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements

Definitions

  • the present invention relates to a gas discharge device for a power storage device that discharges gas when the gas pressure at the gas discharge port of the power storage device is equal to or higher than a predetermined value.
  • hybrid cars and electric cars use power storage devices such as batteries and capacitors.
  • power storage devices such as batteries and capacitors.
  • a battery such as a lithium ion battery
  • such an electricity storage device may generate gas due to a chemical reaction of the electrolyte. In this case, it is necessary to discharge gas from inside the power storage device to the outside of the power storage device.
  • Patent Document 1 describes a cap-shaped liquid injection port that has a cylindrical liquid injection port that protrudes upward from the battery inner lid, a circular plate-shaped ceiling plate, and a peripheral wall that hangs from its periphery.
  • a sealed lead-acid battery is described, which has a cap valve that is detachably attached to the upper outer periphery of a liquid injection port.
  • the upper outer periphery of the liquid inlet is provided with a protrusion having a tapered outer surface and a horizontal locking surface formed on the lower end surface. Furthermore, a protrusion is provided on the inner periphery of the lower end of the peripheral wall of the cap valve, the outer surface of which has a tapered surface, and the upper end surface of which has a horizontal locking surface. Then, by covering the upper outer periphery of the liquid injection port with a cap valve, the locking surface of the protrusion on the liquid injection port side and the locking surface of the protrusion on the cap valve side are locked to each other, and the liquid injection port is A cap valve is attached to the mouth. Further, when the gas pressure inside the lead acid battery exceeds a predetermined value, the cap valve is removed from the liquid injection port, and the gas inside the lead acid battery is discharged.
  • the cap valve in the sealed lead-acid battery is usually attached to the upper outer periphery of the liquid injection port so that its center is aligned with the center of the liquid injection port.
  • the center of the cap valve may be attached to the upper outer periphery of the liquid inlet with its center being shifted from the center of the liquid inlet.
  • the seal ring will be pressed by both locking surfaces. The deformation of the seal ring becomes uneven.
  • an object of the present invention is to provide a gas exhaust device for a power storage device that can reliably remove a cap member from a base member when the gas exhaust port of the power storage device reaches a predetermined value or more.
  • the present invention provides a gas discharge device for a power storage device that discharges gas when the gas pressure at the gas discharge port of the power storage device is equal to or higher than a predetermined value, the device being fixed to the gas discharge port. and a base member having a cylindrical part in which a passage communicating with the gas exhaust port is formed and an engaged part provided on the outer periphery of the cylindrical part,
  • the cap member includes a cap member that is removably attached to a base member, and a seal member that is disposed between the base member and the cap member, and the cap member includes a lid portion and a seal member provided on the lid portion.
  • a pressing part that presses the sealing member, a pair of elastic pieces extending from positions facing each other in the circumferential direction of the lid part, and a claw part formed on each elastic piece and engaging and disengaging from the engaged part. and when the claw portion engages the engaged portion with the pair of elastic pieces being bent outward and the gas pressure at the gas outlet is equal to or higher than a predetermined value, The claw portion is configured to be disengaged from the engaged portion and detached from the base member due to the pressure applied to the lid portion, and the sealing member is in a state where it is pressed by the pressing portion.
  • a pair of second guide parts are provided which are located inside and further guide the elastic piece guided by the first guide part during the mounting, and a gap between the pair of first guide parts is defined as L1. , where L2 is the gap between the pair of second guide parts and L3 is the length of the elastic piece in the width direction, L1>L2>L3.
  • the cap member when the cap member is attached to the base member, the cap member is guided in opposing directions of the pair of elastic pieces by the pair of elastic pieces that engage with each other in an outwardly deformed state, and The elastic piece guided by the first guide part is further guided by the second guide part, so that the elastic piece is guided in a direction intersecting the opposing direction of the pair of elastic pieces. Therefore, since the center of the sealing member can be easily aligned with the center of the lid of the cap member, the pressing part provided on the lid will bite into the sealing member in an offset state, causing deformation of the sealing member. It is possible to suppress non-uniformity. As a result, when the gas pressure at the gas discharge port exceeds a predetermined value and the claw portion disengages from the engaged portion, the cap member can be reliably removed from the base member.
  • FIG. 1 is an exploded perspective view showing one embodiment of a gas exhaust device for a power storage device according to the present invention. It is a perspective view of the state where each member of the gas exhaust device for electricity storage devices is assembled.
  • FIG. 2 is a perspective view of a base member constituting the gas exhaust device for the electricity storage device, viewed from a direction different from that in FIG. 1 .
  • FIG. 4 is an enlarged perspective view of the main part of FIG. 3; It is a front view of the base member which constitutes the gas discharge device for electricity storage devices concerning the present invention.
  • 6 is an enlarged view of section A in FIG. 5.
  • FIG. 2 is a perspective view of a base member constituting the gas exhaust device for the electricity storage device, viewed from a direction different from that in FIG. 1 .
  • FIG. 4 is an enlarged perspective view
  • FIG. 10 is a longitudinal cross-sectional view in a direction different from FIG. 9 of the gas exhaust device for the electricity storage device.
  • FIG. 11 is an explanatory longitudinal cross-sectional view of a state in which the cap member is removed from the base member in the state shown in FIG. 10;
  • FIG. 3 is a cross-sectional view of the gas exhaust device for the electricity storage device.
  • 13 is an enlarged view of section D in FIG. 12.
  • FIG. (a) is an enlarged cross-sectional view of the main part when the pressing part of the cap member bites into the seal member without being deviated in the line EE of FIG.
  • FIG. 12 is an enlarged cross-sectional view of the main part when the pressing part of the cap member bites into the seal member in a deviated state, (c) is a case where the second guide part is not present.
  • FIG. It shows the process of attaching the cap member to the base member, in which (a) is an explanatory diagram of the state in which the claw part of the elastic piece is received in the receiving recess, and (b) is an explanatory diagram of the state in which the claw part is engaged with the engaged part.
  • FIG. FIG. 2 is a perspective view for explaining the usage location of the gas exhaust device for a power storage device according to the present invention.
  • this gas discharge device 10 for power storage device (hereinafter also simply referred to as “discharge device 10") has a gas pressure at a gas discharge port 6 (see FIGS. 9 to 11) of power storage device 1 at a predetermined value. This is for discharging the gas G at the above times.
  • a plurality of power storage devices 1 are arranged within the case 2.
  • two power storage devices 1 are arranged in each of the left and right regions within the case 2.
  • Each power storage device 1 is attached with a connector 3 that communicates with its internal space.
  • a pair of power storage devices 1, 1 disposed in the left and right regions within the case 2, respectively, are connected to a common gas exhaust tube 4 via connectors 3, 3.
  • gas exhaust tubes 4 each extend outward from the case 2 via tube holding members 5 made of rubber, sponge, or the like. That is, gas exhaust tubes 4, 4 extend outward from the left and right side walls of the case 2.
  • a gas exhaust port 6 is provided at the distal end of each gas exhaust tube 4 in the extending direction.
  • the gas exhaust port 6 is arranged so that its opening faces downward.
  • a mounted member 7 having a mounting hole 7a is arranged at a position facing the gas discharge port 6, and the exhaust device 10 is mounted to the mounting hole 7a of the mounted member 7. (See Figures 9-11).
  • Examples of the above power storage device 1 include batteries (such as lithium ion batteries), capacitors, and capacitors used in hybrid vehicles including plug-in hybrid vehicles, electric vehicles, etc., but any device capable of storing power can be used. However, there are no particular limitations. Further, the shape and structure of the case, the shape and number of power storage devices arranged in the case, etc. are not particularly limited.
  • the exhaust device 10 in this embodiment has a cylindrical portion that is fixed to the gas exhaust port 6 and has a passage 23 formed therein that communicates with the gas exhaust port 6. 21 and an engaged portion 41 provided on the outer periphery of the cylindrical portion 21; a cap member 60 that is removably attached to the base member 20 so as to close the outlet 23b of the passage 23; , a sealing member 80 disposed between the base member 20 and the cap member 60 to seal the gap therebetween.
  • the cap member 60 also includes a lid portion 61, a pressing portion 67 provided on the lid portion 61 to press the seal member 80, and a pair of elastic pieces 69 extending from positions facing each other in the circumferential direction of the lid portion 61. , 69, and a claw portion 71 formed on each elastic piece 69 and engaging and disengaging from the engaged portion 41.
  • this cap member 60 is pushed toward the outlet 23b side of the passage 23 of the cylindrical portion 21 constituting the base member 20, and the claw portions 71, 71 of the pair of elastic pieces 69, 69 are inserted into the base member 20.
  • the pair of engaged parts 41, 41 it is mounted on the base member 20 (see FIG. 10).
  • the direction in which the cap member 60 is pushed into the base member 20 and the cap member 60 is mounted on the base member 20 is referred to as "the mounting direction F1 of the cap member 60" or "the cap member mounting direction F1". (See Figure 1).
  • the seal member 80 is externally mounted on the cylindrical portion 21 of the base member 20 while being pressed by the pressing portion 67 of the cap member 60, and the seal member 80 is attached to the cylindrical portion 21 of the base member 20. It is designed to seal the gaps between.
  • this ejection device 10 includes a seal washer 8 that is attached to the base member 20 and seals the gap between the attachment hole 7a of the attached member 7 and the base member 20.
  • the seal member 80 and seal washer 8 described above are annular and made of a porous material such as sponge, or an elastic material such as rubber or elastic elastomer. Furthermore, the seal member 80 may be compressed by being pressed from the axial direction by an external force or gas pressure, and its thickness may become thin, or it may be pressed from the inside in the radial direction and expand, or it may be compressed from the outside in the radial direction. It is possible to change the diameter, etc. Note that the seal member 80 has a smaller diameter than the seal washer 8.
  • the base member 20 of this embodiment has a cylindrical portion 21 having a generally cylindrical shape with a passage 23 formed therein.
  • An annular flange portion 25 extends from the outer periphery of the cylindrical portion 21 midway in the axial direction. This flange portion 25 holds the seal washer 8 between the base member 20 and the attached member 7 when the base member 20 is attached to the attachment hole 7a of the attached member 7 (see FIGS. 9 to 11).
  • a portion on the proximal end side (one end side) of the cylindrical portion 21 in the extending direction forms a connecting portion 27, and a portion on the distal end side (other end side) in the extending direction of the cylindrical portion 21, It forms an insertion section 29.
  • the distal end side of the cylindrical part 21 means the end side where the cap member 60 is arranged, and the proximal end side of the cylindrical part 21 refers to the side opposite to the distal end side. This means the end side where the gas exhaust port 6 is arranged.
  • the base member 20 is connected to and fixed to the gas exhaust port 6.
  • the insertion portion 29 is a portion that is inserted into the mounting hole 7a of the mounted member 7 and is inserted from an opening on the back side of the mounting hole 7a (the side opposite to the front side that is the facing surface of the flange portion 25). It has become.
  • the proximal opening of the passage 23 formed in the cylindrical part 21 on the side of the connecting part 27 serves as an inlet 23a for the gas G that is about to flow into the passage 23 via the gas exhaust tube 4.
  • the opening at the end of the passage 23 on the side of the insertion portion 29 serves as an outlet 23b for the gas G flowing out from inside the passage 23.
  • a ring-shaped annular protrusion 31 is directed outward in the radial direction of the cylindrical portion 21. It is installed protrudingly.
  • a pair of thin plate-shaped guide walls 33, 33 arranged parallel to each other are connected to the cylindrical portion 21 from two circumferentially opposing locations of the annular protrusion 31. They each extend along the axial direction. That is, a total of four guide wall portions 33 are provided on the cylindrical portion 21, one pair each at positions facing each other in the circumferential direction of the annular protrusion 31 (see FIG. 5). Note that one end of each guide wall portion 33 in the extending direction is connected to the back side of the flange portion 25 (see FIG. 10).
  • an arcuate sealing member retaining wall 35 is formed from the outer peripheral edge of the annular protrusion 31 other than the portion where the pair of guide walls 33, 33 are provided. , extending along the axial direction of the cylindrical portion 21.
  • a seal member mounting groove 37 having a substantially annular groove shape is provided between the annular protrusion 31, the seal member retaining wall 35, and the distal end portion of the insertion portion 29 of the cylindrical portion 21. is starting to form.
  • a seal member 80 is inserted and held in this seal member mounting groove 37 and is mounted on the outer periphery of the cylindrical portion 21 (sheathed on the outside). Furthermore, the seal member retaining wall 35 restricts the seal member 80 from expanding outward in the radial direction.
  • a sealing member holding protrusion 39 is provided on the outer periphery of the most distal end of the insertion portion 29 of the cylindrical portion 21 and between the pair of guide walls 33, 33. .
  • a pair of seal member holding protrusions 39, 39 are provided at two circumferentially opposing locations on the cylindrical portion 21 (see FIG. 5). These pair of seal member holding protrusions 39, 39 hold the seal member 80 mounted in the seal member mounting groove 37 so as not to come off (see FIG. 10).
  • annular protrusion 31 between the pair of guide walls 33 forms an engaged portion 41 (see FIG. 3).
  • a pair of engaged parts 41, 41 are provided at two circumferentially opposing locations on the annular protrusion 31.
  • each engaged portion 41 that is close to the flange portion 25 forms an engaged surface 42.
  • the engaged surface 42 includes a flat horizontal surface 42a (a surface perpendicular to the axis of the base member 20) and a radially outer side thereof.
  • the curved surface 42b has a curved surface shape.
  • the claws 71, 71 of the pair of elastic pieces 69, 69 of the cap member 60 engage with the engaged surfaces 42, 42 of the pair of engaged parts 41, 41. It has become.
  • a surface 43 of the engaged portion 41 facing the inner periphery of the elastic piece 69 (hereinafter also simply referred to as "opposing surface 43") has a top portion 43a and a top portion 43a. It has a curved surface 43b that gradually becomes lower in a direction away from each other in the circumferential direction of the cylindrical portion 21 from 43a.
  • the opposing surface 43 of the engaged portion 41 includes an arcuate rounded top portion 43a arranged at the circumferential center of the engaged portion 41, and a cylindrical shape formed from the top portion 43a. It has curved surfaces 43b, 43b which are convex curved surfaces that gradually become lower in the direction away from each other in the circumferential direction of the portion 21, here, toward both sides in the width direction of the engaged portion 41 (see FIG. 4).
  • a thin plate-shaped overhanging piece 44 overhangs radially outward from the outer periphery of the annular protrusion 31, and on the outer peripheral edge of this overhanging piece 44,
  • An outer peripheral wall portion 45 extends in the axial direction of the cylindrical portion 21 .
  • the outer peripheral wall portion 45 has an arcuate portion 45a having an arcuate shape that matches the outer peripheral shape of the annular protrusion 31, and flat portions 45b, 45b which are parallel to each other and have a flat surface shape.
  • the outer peripheral wall portion 45 is cut out at a portion where the pair of engaged portions 41, 41 are located (see FIG. 5), and the pair of elastic pieces 69, 69 of the cap member 60 are cut out at the portion where the pair of engaged portions 41, 41 are located. It is possible to enter between the parts 33 and 33.
  • a pair of engagement portions that can be flexibly deformed are formed obliquely outward toward the flange portion 25.
  • Pieces 47, 47 extend. These pair of engaging pieces 47, 47 are arranged perpendicularly to the pair of engaged parts 41, 41 when the cylindrical part 21 is viewed from the axial direction (see FIG. 5). Further, as shown in FIG. 7, an engagement surface 47a having a tapered shape is formed on the outer surface of the distal end portion of each engagement piece 47 in the extending direction.
  • each engagement piece 47 engages with the back side periphery of the attachment hole 7a of the attached member 7, so that The base member 20 is fixed to the attachment hole 7a, and the entire discharge device 10 is attached to the attachment member 7.
  • the outer periphery of the cylindrical portion 21 is located on both sides of the elastic piece 69 of the cap member 60 in the width direction, and serves as a guide when the cap member 60 is attached to the base member 20. It is located on both sides in the width direction of the pair of first guide parts 51, 51 and the elastic piece 69, and is located inside the cylindrical part 21 in the radial direction than the pair of first guide parts 51, 51, and is connected to the base member 20.
  • a pair of second guide parts 53, 53 are provided to further guide the elastic piece 69 guided by the pair of first guide parts 51, 51 when the cap member 60 is attached.
  • the width direction of the elastic piece 69 is perpendicular to the direction in which the elastic piece 69 bends and deforms (see arrow T in FIG. 10), and the width direction of the elastic piece 69 is perpendicular to the direction in which the elastic piece 69 bends and deforms (see arrow T in FIG. 10). means the direction along the circumferential direction of the peripheral wall 65, which will be described later.
  • the inner surface of the proximal end 33a (the end close to the seal member holding wall 35) of the pair of guide walls 33, 33 in the protruding direction A pair of rib-like protrusions 49, 49 are provided in a protruding manner at a location opposite to the cap member mounting direction F1.
  • the pair of second guide parts 53, 53 are provided at locations closer to the radially inner side of the cylindrical part 21 than the pair of first guide parts 51, 51. Further, the pair of second guide portions 53, 53 have flat surfaces parallel to each other. Further, the tip (upper end) of the second guide portion 53 is formed continuously with the base end (lower end) of the first guide portion 51 via an R-shaped boundary portion 53a, so to speak. It can also be said that the second guide section 53 is provided at a position one step lower than the first guide section 51 via the boundary section 53a.
  • FIG. 13 shows the relationship among the first guide part 51, the second guide part 53, and the elastic piece 69. That is, the gap between the pair of first guide parts 51, 51 (the maximum gap between the pair of first guide parts 51, 51) is L1, and the gap between the pair of second guide parts 53, 53 (the maximum gap between the pair of second guide parts 51, 51) is L1.
  • L2 is the minimum gap between the guide portions 53 and 53
  • L3 is the length of the elastic piece 69 in the width direction
  • the setting is such that L1>L2>L3.
  • FIG. 6 shows a state in which the elastic piece 69 is displaced in the circumferential direction of the cylindrical portion 21 with respect to the engaged portion 41 when the cap member 60 is attached to the base member 20 (double-dashed line (See elastic piece 69' shown in .). Even in such a state, the pair of first guide portions 51, 51 and the pair of second guide portions 53, 53 correct the positional deviation of the elastic piece 69, and the engaged portion 41 is placed in the predetermined position.
  • the claw portion 71 is adapted to engage. Note that details of the process of guiding the elastic piece 69 by the first guide part 51 and the second guide part 53 will be described later.
  • the engaged portion 41 will be further explained in relation to the first guide portion 51 and the second guide portion 53. That is, in this embodiment, the claw portion 71 of the elastic piece 69 guided by the second guide portion 53 is received in the portion of the engaged portion 41 opposite to the mounting direction F1 of the cap member 60 with respect to the base member 20. (See FIG. 15(a)), a receiving recess 55 is provided.
  • a pair of rib-like protrusions 49, 49 are provided on the opposite side of the engaged portion 41 from the mounting direction F1 of the cap member 60 with respect to the base member 20.
  • a receiving recess 55 is provided in a portion between the second guide portions 53, 53, which is open at the upper side (the direction facing outward in the radial direction of the cylindrical portion 21) and at one side.
  • the receiving recess 55 has a flat bottom surface 55a, and the receiving recess 55 has rounded corner portions 55b, 55b on both sides of the bottom surface 55a in the width direction.
  • a pair of second guide parts 53, 53 are arranged. That is, the pair of second guide portions 53, 53 serve as inner surfaces of the receiving recess 55 in the width direction.
  • the outer surfaces 57, 57 of the pair of rib-like protrusions 49, 49 on the cap member mounting direction F1 side are aligned in the cap member mounting direction F1. It has a tapered surface that gradually expands toward the sides.
  • cap member 60 that is detachably attached to the base member 20 will be described with reference to FIGS. 1, 9, 10, etc.
  • the cap member 60 of this embodiment includes a lid portion 61, a pressing portion 67, a pair of elastic pieces 69, 69, and a claw portion 71 formed on each elastic piece 69. .
  • the lid portion 61 in this embodiment is composed of a bottom wall 63 having a substantially circular plate shape, and a peripheral wall 65 having a substantially cylindrical wall shape and standing upright from the outer peripheral edge of the bottom wall 63.
  • the bottom wall 63 constituting the lid portion 61 is disposed opposite to the outlet 23b of the passage 23, and serves as a portion for receiving gas G flowing out from the outlet 23b of the passage 23. It can also be said that this is the part on which the pressure of the gas G at the gas discharge port 6 acts.
  • each claw portion 71, 71 of each elastic piece 69 engage with the pair of engaged portions 41, 41, respectively, with the pair of elastic pieces 69, 69 being bent and deformed outward.
  • each claw part 71 is disengaged from the engaged part 41 and detached from the base member 20 due to the pressure applied to the lid part 61. has been done.
  • a pressing part 67 in the shape of an annular protrusion protrudes from the inner circumferential edge of the distal end surface 65a of the peripheral wall 65 of the lid part 61 in the upright direction.
  • This pressing portion 67 can be inserted into the sealing member mounting groove 37 of the base member 20 when the cap member 60 is mounted on the base member 20 (see FIG. 9).
  • each elastic piece 69 extends from the outer peripheral edge of the lid portion 61 at two radially opposite locations.
  • Each elastic piece 69 is a strip-like piece whose base end (fixed end) is connected to the inner peripheral edge of the distal end surface 65a of the peripheral wall 65 constituting the lid section 61, and extends beyond the distal end of the pressing section 67. It becomes.
  • each elastic piece 69 has a free end at its tip in the extending direction, and can be bent inward or outward of the cap member 60 as shown by arrow T in FIG. 10. There is. Further, the width of each elastic piece 69 along the circumferential direction is narrower than the interval between the pair of guide walls 33, 33 of the base member 20, so that when the cap member 60 is attached to the base member 20, It is possible to enter between the guide wall portions 33, 33 of.
  • a claw portion 71 is provided protruding from the inner periphery of the tip end of each elastic piece 69 in the extending direction.
  • this claw portion 71 has a top portion 72 that most protrudes from the inner circumferential surface of the elastic piece 69, and a side F1 in the attachment direction of the cap member 60 (a side away from the lid portion 61).
  • a tapered surface 73 is formed on the outer surface of the cap member and has an inclined surface shape that gradually reduces the amount of protrusion from the top portion 72 toward the distal end side in the extending direction of the elastic piece 69.
  • the engaging surface 74 is formed on the outer surface (the side opposite to the mounting direction F1) and has an inclined surface shape that gradually reduces the amount of protrusion from the top portion 72 toward the proximal end side in the direction in which the elastic piece 69 extends. have.
  • the claw portion 71 is formed over the entire circumferential direction (width direction) of the elastic piece 69 (see FIG. 1). Therefore, when the first guide part 51 and the second guide part 53 guide the elastic piece 69, the claw part 71 mainly comes into contact with the first guide part 51 and the second guide part 53.
  • cap member 60 is pushed into the base member 20 in the cap member mounting direction F1 of FIG.
  • the elastic piece 69 be in a position where it can be inserted between the pair of second guide parts 53, 53.
  • the position is often shifted in one direction (see the elastic piece 69' indicated by the two-dot chain line in FIG. 6). In this case, the claw portion 71 will not engage with the predetermined position of the engaged portion 41.
  • the displacement of the elastic piece 69 in the circumferential direction of the cylindrical part 21 is corrected, and the claw part is placed in a predetermined position of the engaged part 41. 71 can be engaged.
  • the elastic piece 69 is guided by one of the first guide parts 51 to move in the circumferential direction (lateral displacement movement) toward the other first guide part 51, so that the cylindrical part of the elastic piece 69 21 in the circumferential direction is corrected, and as a result, the positional deviation of the claw portion 71 with respect to the engaged portion 41 is also corrected.
  • the elastic piece 69 whose positional deviation has been corrected by the first guide part 51 enters (falls down) between the pair of second guide parts 53 and 53 due to its elastic restoring force F2.
  • the elastic piece 69 is displaced in one direction in the circumferential direction of the cylindrical portion 21 , for example, one widthwise side portion of the claw portion 71 comes into contact with one of the second guide portions 53 .
  • the claw part 71 is pressed by one of the second guide parts 53, and the elastic piece 69 is guided to move in the circumferential direction toward the other second guide part 53, while the pair of second guide parts 53 , 53 (elastic piece 69'' shown by the two-dot chain line in FIG. 6).
  • the displacement of the elastic piece 69 in the circumferential direction of the cylindrical portion 21 is further corrected, and the displacement of the claw portion 71 with respect to the engaged portion 41 is also further corrected.
  • the positional deviation of the elastic piece 69 in the circumferential direction of the cylindrical part 21 is corrected by the two guide parts, the first guide part 51 and the second guide part 53. It is configured.
  • the second guide part 53 has a flat surface shape, and is provided at a position one step lower than the first guide part 51 via a boundary part 53a. Therefore, the difference in the inclination angle with respect to the line segment L along the arrangement direction of the pair of guide walls 33, 33 is clear. Therefore, the widthwise corner 69a of the elastic piece 69 guided by the first guide part 51 (the lower corner of the elastic piece 69'' in FIG. 6) is securely attached to the second guide part 53. It has a structure that makes contact.
  • the cap member 60 When the cap member 60 is further pushed into the base member 20 from this state, the top part 72 of the claw part 71 comes out of the receiving recess 55, and the top part 72 becomes the top part 43a of the opposing surface 43 of the engaged part 41. sliding into contact with each other. Then, when the claw portion 71 climbs over the engaged portion 41 and the engaging surface 74 reaches the engaged surface 42, the elastic piece 69 elastically returns, and as shown in FIG. 15(b), the claw portion The engaging surface 74 of 71 engages with the engaged surface 42 of the engaged portion 41 .
  • the cap member 60 is attached to the base member 20 via the pair of elastic pieces 69, 69 and their claws 71, 71.
  • the engaged surface 42 of the base member 20 and the claw portion 71 of the cap member 60 are arranged diagonally.
  • the claw portion 71 is provided with an engaging surface 74 having an inclined surface shape, and this engaging surface 74 is engaged with the engaged surface 42 of the base member 20 including the curved surface 42b.
  • the engaging force of the cap member 60 with respect to the base member 20 is lower than that in the case where both the engaging surface of the claw part and the engaged part are horizontal planes and they engage with each other. Therefore, when the gas pressure at the gas discharge port 6 becomes a predetermined value or more, and the gas G flowing into the passage 23 from the inlet 23a of the base member 20 and flowing out from the outlet 23b also becomes a predetermined value or more, the gas G will pressurize the base member 20.
  • the pair of elastic pieces 69, 69 are bent and deformed outward through the lid part 61 of the cap member 60, and the engagement of the claw part 71 with the engaged surface 42 of the base member 20 is released.
  • the cap member 60 is configured to be detachable from the member 20.
  • each elastic piece 69 completely maintains the state in which the cap member 60 is not bent outwardly. Rather than returning, the claw portion 71 engages with the engaged surface 42 while maintaining the state in which the cap member 60 is slightly bent outward.
  • the shapes, structures, layouts, etc. of the electricity storage device, the case, the gas exhaust tube, the tube holding member, the gas exhaust port, etc. are not limited to the above embodiments.
  • two power storage devices 1 form a set, but three or more power storage devices may be used as a set via connectors or tubes.
  • the gas discharge port 6 is a downward opening, it may also be a horizontal opening.
  • the shapes and structures of the base member, cap member, seal member, seal washer, etc. that constitute the gas exhaust device for an electricity storage device are not limited to the above embodiments.
  • the base member 20 has a cylindrical portion 21 that has a connecting portion 27 and an insertion portion 29 and has a generally cylindrical shape as a whole.
  • it may have a substantially elliptical cylindrical shape, as long as it is fixed to the gas exhaust port and has a passage therein that communicates with the gas exhaust port.
  • the base member 20 of this embodiment is such that its connecting portion 27 is inserted into the gas exhaust port 6 of the gas exhaust tube 4 and fixed therein.
  • the base member may be fixed to the gas outlet.
  • the base member 20 in this embodiment has a pair of anchor-shaped engagement pieces 47, 47, but for example, an engagement protrusion may be provided on the outer periphery of the base member, and this engagement protrusion may be engaged with a mounting hole in the member to be attached, and there is no particular limitation on the mounting structure of the base member relative to the mounting hole.
  • first guide parts 51, 51 of this embodiment have tapered surfaces that gradually become narrower toward the radial inward side of the cylindrical part 21.
  • the guide portion may be a curved surface, a plurality of sloped surfaces, a combination of a curved surface and a sloped surface, etc., and can correct the circumferential positional deviation of the elastic piece, and can also be used to connect the elastic piece to the second guide portion. It would be good if it could be guided to.
  • the pair of second guide portions 53, 53 in this embodiment have a flat surface shape parallel to each other, but for example, the second guide portions 53, 53 are inclined so that the width becomes gradually narrower toward the inside in the radial direction of the cylindrical portion. It may be a tapered surface or may have any shape as long as it can guide the elastic piece in a manner that corrects the circumferential positional deviation.
  • the bottom wall 63 of the lid portion 61 also has a substantially circular plate shape, corresponding to the insertion portion 29 of the substantially cylindrical cylindrical portion 21 of the base member 20.
  • the lid part may have a substantially rectangular plate shape, a substantially elliptical plate shape, etc., and can cover the outlet of the passage of the base member and catch the gas flowing out from the outlet. Good to have.
  • a claw portion 71 is provided protrudingly on the inner periphery of the tip of the elastic piece 69, but the claw portion may be provided midway in the extending direction of the elastic piece, and may be provided as long as it can engage with the engaged portion.
  • the claw portion 71 in this embodiment is formed over the entire width of the elastic piece 69, it may be formed narrower or wider than the elastic piece 69.
  • both the seal member 80 and the seal washer 8 have an annular shape, these may be, for example, in the shape of a square ring or an elliptical ring, and can be changed as appropriate depending on the shape and structure of the base member.
  • the lid part 61 of the cap member 60 has a function of receiving the pressure of the gas G, but this lid part does not allow moisture to pass through, but allows a predetermined flow rate of gas such as gas to pass through. It may also have a function.
  • a sealing member 80 is externally mounted on the portion 21 .
  • one elastic piece 69 is aligned between one of the guide walls 33, 33, and the other elastic piece 69 is positioned between the other guide wall parts 33, 33. After alignment, the cap member 60 is pushed into the base member 20.
  • the claw portion 71 is pressed by one of the first guide portions 51, and the elastic piece 69 is pushed out and deformed outwardly of the cap member 60, and the first guide portion 51 causes the elastic piece 69 to The positional deviation of the cylindrical portion 21 in the circumferential direction is corrected. Thereafter, the elastic piece 69 enters between the pair of second guide parts 53, 53, and the second guide part 53 further corrects the displacement of the elastic piece 69 in the circumferential direction of the cylindrical part 21.
  • the two guide parts, the first guide part 51 and the second guide part 53 correct the positional deviation of the elastic piece 69 in the circumferential direction of the cylindrical part 21, and the position of the claw part 71 relative to the engaged part 41 is corrected. Misalignment is corrected. Further, as shown in FIG. 15(a), the top portion 72 of the claw portion 71 is received in the receiving recess 55 provided in the engaged portion 41.
  • the cap member 60 When the cap member 60 is further pushed into the base member 20, the top part 72 of the claw part 71 comes out of the receiving recess 55, and the top part 72 comes into sliding contact with the top part 43a of the opposing surface 43 of the engaged part 41, When the claw portion 71 climbs over the engaged portion 41, the elastic piece 69 elastically returns, and the engaging surface 74 of the claw portion 71 engages with the engaged surface 42 of the engaged portion 41 (Fig. 15 (see (b)).
  • the cap member 60 is attached to the base member 20 with the seal member 80 interposed between the base member 20 and the cap member 60 via the pair of elastic pieces 69, 69 and their claws 71, 71. Can be installed. Further, the sealing member 80 is pressed by the pressing portion 67 of the cap member 60 and becomes crushed within the sealing member mounting groove 37 (see FIG. 9).
  • the seal washer 8 is placed on the back side of the flange portion 25 of the base member 20, and the insertion portion 29 of the base member 20 is inserted through the opening on the front side of the attachment hole 7a of the attached member 7. Then, the pair of engagement pieces 47, 47 are pressed by the inner periphery of the attachment hole 7a and are bent and deformed inwardly, and the engagement surface 47a of the engagement piece 47 comes out from the back opening of the attachment hole 7a. Then, the pair of engaging pieces 47, 47 elastically return, and their engaging surfaces 47a, 47a engage with the back side periphery of the attachment hole 7a, allowing the ejection device 10 to be attached to the attachment hole 7a (FIG. 9). reference). In this state, the seal washer 8 is held between the flange portion 25 of the base member 20 and the front side periphery of the attachment hole 7a of the attached member 7, ensuring watertightness.
  • gas G When gas G is generated in the power storage device 1 due to power supply to the drive source and electrical components by the power storage device 1, or due to the external environment or internal environment of the power storage device 1, etc. (for example, if the power storage device such as a lithium ion battery , when power is supplied by driving a motor etc., gas is generated due to the chemical reaction of the electrolyte), gas G flows through the connector 3 and gas exhaust tube 4 and reaches the gas exhaust port 6; When the gas pressure at is equal to or higher than a predetermined value, the cap member 60 is removed from the base member 20.
  • the power storage device such as a lithium ion battery
  • the gas G flows into the passage 23 from the inlet 23a of the base member 20, flows through the passage 23, flows out from the outlet 23b, and presses the lid part 61 of the cap member 60, but the gas G does not discharge gas.
  • the pressure of the gas G (see FIG. 10) acting on the lid portion 61 of the cap member 60 also becomes a predetermined value or more.
  • the engaging surface 74 of the claw portion 71 comes off from the horizontal surface 42a and curved surface 42b of the engaged surface 42, and the engagement between the engaged surface 42 and the claw portion 71 is released. As shown, the cap member 60 can be removed from the base member 20.
  • the pair of elastic pieces 69, 69 are bent outward so that the claw parts 71, 71 engage with the pair of engaged parts 41, 41. It has become. Therefore, when the cap member 60 is attached to the base member 20, the cap member 60 is moved in the opposite direction by the pair of elastic pieces 69, 69 that are engaged in an outwardly deformed state. is guided. That is, by utilizing the elastic return force of the pair of elastic pieces 69, 69, the claw parts 71, 71 are respectively attached to the pair of engaged parts 41, 41 in the direction opposite to the radial direction of the cylindrical part 21. They can be firmly engaged (for example, it is possible to prevent a situation in which only the claw portion 71 of one elastic piece 69 engages with one of the engaged portions 41).
  • the elastic piece 69 guided by the first guide part 51 is further guided by the second guide part 53, thereby being guided in a direction intersecting the opposing direction of the pair of elastic pieces 69, 69. That is, when the cap member 60 is attached to the base member 20, the elastic piece 69 guided by the first guide part 51 is further guided by the second guide part 53, so that the elastic piece 69 is , it is possible to reliably correct the positional deviation of the cylindrical portion 21 in the circumferential direction and engage the claw portion 71 in a predetermined position of the engaged portion 41 .
  • the pressing portion 67 of the lid portion 61 is deviated inward in the radial direction with respect to the sealing member 80 (the pressing portion 67 indicated by the two-dot chain line is If the sealing member 80 bites in with the position shifted in the direction shown by the arrow, the deformation of the sealing member 80 becomes uneven. Moreover, although the hooking allowance S1 of the seal member 80 on the radial outer peripheral edge of the pressing portion 67 of the cap member 60 (the upper portion in FIG. 14(b)) is large, the radial inner peripheral edge of the pressing portion 67 ( 14(b)), the hooking allowance S2 of the seal member 80 is reduced.
  • the cap member 60 is easily detached from the base member 20 from the portion where the seal member 80 has a small hooking allowance S2, and when the gas pressure at the gas discharge port 6 exceeds a predetermined value, the cap member 60 is removed from the base member 20. There is a risk that it may come off.
  • the center C2 of the sealing member 80 can be easily aligned with the center C1 of the lid part 61 of the cap member 60, and the pressing part 67 is in a state deviated toward the sealing member 80. It is regulated to bite into it.
  • the deformation of the seal member 80 becomes uniform, and as shown in FIG. 14(a), the seal member 80
  • the hooking distance S1 of the seal member 80 and the hooking margin S2 of the seal member 80 with respect to the radially inner circumferential edge portion of the pressing portion 67 (lower portion in FIG. 14(a)) are almost the same.
  • the cap member 60 can be reliably removed from the base member 20.
  • the pair of first guide portions 51, 51 have tapered surfaces that gradually become narrower toward the radial inward side of the cylindrical portion 21.
  • the first guide portion 51 corrects the displacement. Therefore, it is possible to make it easier to guide the object to the second guide portion 53.
  • a claw portion of an elastic piece 69 guided by a second guide portion 53 is provided in a portion of the engaged portion 41 on the opposite side to the mounting direction F1 of the cap member 60 with respect to the base member 20.
  • a receiving recess 55 is provided for receiving 71 .
  • the claw portion 71 of the elastic piece 69 guided by the second guide portion 53 is once received in the receiving recess 55, and the engaged portion
  • the claw portion 71 rides over the engaged portion 41 while being positioned in the axial direction and circumferential direction of the engagement portion 41 . Therefore, the pushing force when pushing the cap member 60 effectively acts on the claw part 71, making it easier for the claw part 71 to get over the engaged part 41 (if there is no receiving recess 55, the cap member 60, the claw portion 71 is likely to be misaligned with respect to the engaged portion 41, making it difficult to get over the engaged portion 41).
  • the claw portion 71 can be easily engaged with the engaged surface 42 of the engaged portion 41 on the side of the cap member attachment direction F1 relative to the base member 20, and the cap member 60 can be attached to the base member 20. Workability can be improved.
  • the surface 43 of the engaged portion 41 facing the inner periphery of the elastic piece 69 has a top portion 43a and a surface 43 in the circumferential direction of the cylindrical portion 21 from the top portion 43a. and a curved surface 43b that gradually becomes lower in the direction of separation from each other.
  • the claw part 71 moves toward the opposite side of the engaged part 41. It comes into sliding contact only with the top 43a of the surface 43. As a result, sliding resistance when the claw portion 71 gets over the engaged portion 41 can be suppressed, so that the claw portion 71 can easily get over the engaged portion 41, and the cap is removed from the base member 20. The member 60 can be easily removed.
  • Electricity storage device 6 Gas discharge port 10 Gas exhaust device for electricity storage device (exhaust device) 20 Base member 21 Cylindrical part 23 Passage 41 Engaged part 51 First guide part 53 Second guide part 55 Receiving recess 60 Cap member 61 Lid part 69 Elastic piece 71 Claw part

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

La présente invention concerne un appareil d'échappement de gaz pour un dispositif de stockage d'énergie, dans lequel un élément de capuchon peut être retiré de manière sûre d'un élément de base lorsqu'une sortie de gaz du dispositif de stockage d'énergie atteint ou dépasse une valeur prédéterminée. L'appareil d'échappement de gaz 10 pour un dispositif de stockage d'énergie comprend un élément de base 20, un élément de capuchon 60 et un élément d'étanchéité 80, l'élément de capuchon 60 présentant une partie couvercle 61, une partie pression 67, une paire de pièces élastiques 69, 69 et une partie griffe 71, la partie griffe 71 mettant en prise une partie accouplement 41 avec les pièces élastiques 69 fléchies vers l'extérieur, et une paire de premières parties de guidage 51, 51 et une paire de secondes parties de guidage 53, 53 étant disposées sur la circonférence d'une partie cylindrique 21, les secondes parties de guidage 53 étant situées plus radialement vers l'intérieur de la partie cylindrique 21 que les premières parties de guidage 51 et guidant en outre les pièces élastiques 69 guidées par les premières parties de guidage 51 lorsque l'élément de capuchon est monté.
PCT/JP2023/033061 2022-09-14 2023-09-11 Appareil d'échappement de gaz pour dispositif de stockage d'énergie WO2024058126A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-146370 2022-09-14
JP2022146370 2022-09-14

Publications (1)

Publication Number Publication Date
WO2024058126A1 true WO2024058126A1 (fr) 2024-03-21

Family

ID=90275054

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/033061 WO2024058126A1 (fr) 2022-09-14 2023-09-11 Appareil d'échappement de gaz pour dispositif de stockage d'énergie

Country Status (1)

Country Link
WO (1) WO2024058126A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0368578U (fr) * 1989-11-07 1991-07-05
JP2017096309A (ja) * 2015-11-18 2017-06-01 株式会社パイオラックス チェックバルブ
WO2018199238A1 (fr) * 2017-04-28 2018-11-01 日東電工株式会社 Unité perméable aux gaz

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0368578U (fr) * 1989-11-07 1991-07-05
JP2017096309A (ja) * 2015-11-18 2017-06-01 株式会社パイオラックス チェックバルブ
WO2018199238A1 (fr) * 2017-04-28 2018-11-01 日東電工株式会社 Unité perméable aux gaz

Similar Documents

Publication Publication Date Title
US6278259B1 (en) Gas discharging device for battery pack
US7338304B2 (en) Case member having connector portion
KR20210060361A (ko) 압력 완화 장치
US7255585B2 (en) Casing member with connector portion
US7364472B2 (en) Connector
JP5768766B2 (ja) 防水栓
JP2011146288A (ja) 車両用バッテリケース
JP5375741B2 (ja) コネクタ
JP2012522948A (ja) サニタリー・リテーナー
JP5048652B2 (ja) 蓄電池
WO2023124444A1 (fr) Atomiseur, base d'atomisation, noyau d'atomisation et procédé de fabrication s'y rapportant
WO2024058126A1 (fr) Appareil d'échappement de gaz pour dispositif de stockage d'énergie
JP3927394B2 (ja) 電源装置
CN218510391U (zh) 连接接头
WO2023233687A1 (fr) Soupape de surpression pour dispositifs de stockage d'énergie
JP2008531360A (ja) 燃料パイプ組立体の取付け装置と組立方法
JP3934899B2 (ja) 電源装置
US11581611B2 (en) Mounting seat for pressure relief device
JP2023006229A (ja) 蓄電デバイス用ガス排出装置
CN115355379A (zh) 连接接头
JP2703150B2 (ja) 離脱防止管継手
JP7076412B2 (ja) グロメット
EP2961001B1 (fr) Ensemble connecteur pour vehicule
CN219226727U (zh) 车用密封连接器
CN220400957U (zh) 一种连接器及车辆

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23865479

Country of ref document: EP

Kind code of ref document: A1