WO2015129866A1 - Élément d'étanchéité - Google Patents

Élément d'étanchéité Download PDF

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Publication number
WO2015129866A1
WO2015129866A1 PCT/JP2015/055888 JP2015055888W WO2015129866A1 WO 2015129866 A1 WO2015129866 A1 WO 2015129866A1 JP 2015055888 W JP2015055888 W JP 2015055888W WO 2015129866 A1 WO2015129866 A1 WO 2015129866A1
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WIPO (PCT)
Prior art keywords
sealing member
pressed
repulsive force
penetrating
sealing
Prior art date
Application number
PCT/JP2015/055888
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English (en)
Japanese (ja)
Inventor
青山　高久
英樹 河野
継紅 劉
Original Assignee
ダイキン工業株式会社
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.)
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Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Priority to CN201580010017.8A priority Critical patent/CN106068413B/zh
Priority to KR1020167024727A priority patent/KR101856892B1/ko
Publication of WO2015129866A1 publication Critical patent/WO2015129866A1/fr

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    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a sealing member.
  • a gasket used for sealing the periphery of an electrode of a lithium ion battery such as a gasket described in Patent Document 1 (Japanese Patent Laid-Open No. 2013-157155), has been proposed.
  • This gasket is made of resin and is configured to have a portion extending around a hole penetrating vertically.
  • the above-described gasket disclosed in Patent Document 1 is configured only to have a uniform thickness as a whole, and is more effective for leakage of fluid and entry of foreign matter from the outside.
  • the shape of a sealing member such as a gasket that can be suppressed is not described. In particular, no consideration has been given to a shape capable of maintaining a good sealing state even when a long time has passed in a state where the sealing member is used and pressed.
  • This invention is made
  • the subject of this invention is providing the sealing member which can acquire a favorable sealing effect even when it is a case where it uses for a long time. .
  • the sealing member according to the first aspect is an annular sealing member, and is used in a state where it is pressed from one side and the other side in the penetrating direction in the inner penetrating portion. In the pressed state, the sealing member has a portion where the compression ratio in the pressed direction is larger on the outside than on the inside.
  • the sealing member according to the second aspect is the sealing member according to the first aspect, and is configured such that the thickness in the pressed direction increases from the inside toward the outside.
  • the sealing member according to the third aspect is the sealing member according to the first aspect or the second aspect, and has a tensile elastic modulus of 0.8 GPa or less.
  • the sealing member according to the fourth aspect is a sealing member according to any one of the first to third aspects, and includes a perfluoropolymer.
  • the sealing member according to the fifth aspect is the sealing member according to the fourth aspect, and the PFA content is 50 wt% or more and 100 wt% or less.
  • the sealing member according to the sixth aspect is a sealing member according to any one of the first to fifth aspects, and is used for a battery gasket.
  • the sealing member according to the present invention has a portion having a larger compression ratio on the outer side than on the inner side, so that the sealing effect can be improved when used by pressing from the penetration direction. .
  • FIG. 10 is a top view of sealing member 10 as a candidate for simulation. It is a top view of the sealing member 110 as an example. It is a top view of the sealing member 210 as an example. It is side view sectional drawing of the sealing member 10 as the object of simulation. It is side surface sectional drawing of the sealing member 10X as the object of simulation.
  • FIG. 6 is a side sectional view of a sealing member 310 as an example.
  • FIG. 4 is a side sectional view of a sealing member 410 as an example.
  • FIG. 5 is a side sectional view of a sealing member 510 as an example. It is sectional drawing of the side view of the sealing member 610 as an example.
  • FIG. 10 is a side sectional view of a sealing member 710 as an example.
  • sealing member is not particularly limited, and examples thereof include a gasket and packing.
  • the sealing member used for a battery gasket is preferable.
  • Such a battery is a lithium ion battery.
  • As an electrolytic solution of this lithium ion battery one that is unlikely to occur until deterioration reaches 60 ° C. or higher is desirable.
  • the sealing member When used as a gasket for a battery, the sealing member is preferably used such that a battery electrode (for example, a positive electrode or a negative electrode) is located in a portion penetrating inside the sealing member.
  • a battery electrode for example, a positive electrode or a negative electrode
  • Shape of the sealing member is an annular shape, and is used in a state where it is pressed from one side and the other side in the penetrating direction at the inner penetrating portion.
  • the compression ratio in the pressed direction is not particularly limited as long as it has a portion where the outer side is larger than the inner side.
  • the inclined surface may be inclined at 10 degrees or more and 80 degrees or less with respect to a plane whose normal is the penetrating direction, You may incline at 20 degree or more and 70 degrees or less.
  • annular includes a cylindrical shape in which the inner cylindrical portion 11 is cut out and the outer periphery 12 is circular, as in the sealing member 10 shown in the plan view of FIG.
  • a square tube in which the inner rectangular portion 111 is hollowed out and the outer periphery 112 is square is included, and like the sealing member 210 shown in the plan view of FIG.
  • a shape in which the center with respect to the hollowed portion 211 and the center with respect to the outer periphery 212 are eccentric is also included.
  • the shape of the hollowed portion on the inner side in plan view of the sealing member is not particularly limited, and may be a hollowed shape of a cylindrical shape, or a polygonal column such as a quadrangular column or a pentagonal column. It may be a hollow shape.
  • the shape of the outer edge of the sealing member in plan view is not particularly limited, and may be an arc shape or a polygonal shape.
  • the annular sealing member may be configured such that the pressed portion to be pressed in the usage state increases in thickness in the direction in which it is pressed from the inside toward the outside in the non-pressed state.
  • the upper surface 13 is positioned upward toward the outer side.
  • the bottom surface 14 may be shaped so as to be positioned downward as it goes outward, or like the sealing member 10X shown in FIG. 5, the upper surface 13x is positioned upward as it goes outward, and the lower surface 14x extends to the same height position. The shape may be different.
  • the upper side and the lower side in the direction perpendicular to the penetrating direction from the viewpoint of easily obtaining a sealing effect by improving the balance of force when pressed from one side and the other side in the penetrating direction of the sealing member It is more preferable that the shape of
  • the upper and lower portions of the sealing member do not need to form a plane, and are, for example, cross-sectional views including a line extending in the penetrating direction including the center of the penetrating portion inside the sealing member.
  • the upper portion 313 may bulge upward and the lower portion 314 may bulge downward, or as the sealing member 410 illustrated in FIG. 7.
  • the upper portion 413 may be recessed downward and the lower portion 414 may be recessed upward.
  • the upper portion 513 and the lower portion 514 may both be inclined and may have shapes with different inclination angles.
  • the upper part 613 and the lower part 614 may be inclined as a whole with an uneven shape.
  • an upper inclined portion 713 a that is located around the inner penetrating portion and is inclined with respect to the penetrating direction so that the length in the penetrating direction becomes shorter toward the inner side
  • the lower portion It may have a shape having an inclined flat portion 714a and an upper flat portion 713b that is not inclined outside the upper inclined portion 713a and a lower flat portion 714b that is not inclined outside the lower inclined portion 714a.
  • the sealing member only needs to have a portion where the compression ratio in the pressed direction is larger on the outer side than on the inner side in the pressed state.
  • you may be comprised so that a part with a larger compression ratio may not arise inside than the outside.
  • the inner side and the outer side of the sealing member are based on the center of the thickness in the inner and outer directions in the cross section including the line extending in the penetrating direction including the center of the penetrating portion inside the sealing member.
  • the inner compression ratio is preferably smaller than the outer compression ratio, and the value obtained by subtracting the inner compression ratio from the outer compression ratio is preferably 2% or more and 60% or less. It is more preferably 3% or more and 50% or less, and further preferably 10% or more and 30% or less.
  • the overall compression ratio of the sealing member is preferably 10% or more in order to reduce the influence of dimensional tolerance. Furthermore, 20% or more is preferable in order to maintain a high repulsive force for a long period.
  • the compression ratio means a sealing member (or a state where no force is applied to the sealing member in a cross section including a line extending in the penetration direction including the center of the penetrating portion inside the sealing member (or The sealing member (or specifying the sealing member) in a state where the sealing member is pressed from one side and the other side in the penetrating direction and sealed with respect to the cross-sectional area of the specific part of the sealing member)
  • the ratio of the reduced portion of the cross-sectional area (1—the cross-sectional area of the sealing member in the pressed state / the cross-sectional area of the sealing member in a state where no force is applied).
  • This compression ratio is such that when the sealing member is pressed from one side and the other side in the penetrating direction and sealed (used state), the size of the sealing member simply decreases in the pressing direction. The value is obtained assuming that the dimensions do not change.
  • the inclination angle of the surface is relative to the horizontal plane. It is preferably inclined at 5 degrees or more, more preferably at least 10 degrees, and further preferably at least 20 degrees.
  • the material of the sealing member is not particularly limited, and the upper limit of the tensile elastic modulus of the sealing member is preferably 0.8 in order to obtain the sealing effect by the sealing member for a longer time. GPa, more preferably 0.7 GPa. Further, the lower limit of the tensile modulus of the sealing member is preferably 0.3 GPa. The basis for the desirable range of the tensile modulus will be described later.
  • the material for the sealing member is not particularly limited, and rubbery substances, resins other than fluororesins, fluororesins, and mixtures thereof can be used. These materials are preferably contained as a main component of the sealing member.
  • rubbery substances examples include nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR), fluoro rubber (FKM), perfluoro fluoro rubber (FFKM) silicone rubber (VMQ), ethylene propylene rubber (EPDM), and chloroprene rubber.
  • NBR nitrile rubber
  • HNBR hydrogenated nitrile rubber
  • FKM fluoro rubber
  • FFKM perfluoro fluoro rubber
  • VMQ ethylene propylene rubber
  • EPDM ethylene propylene rubber
  • chloroprene rubber CR
  • acrylic rubber ACM
  • IIR butyl rubber
  • U urethane rubber
  • NR natural rubber
  • CSM chlorosulfonated polyethylene rubber
  • CO epichlorohydrin rubber
  • resins other than fluororesins include polyethylene (PE), polypropylene (PP), polycarbonate (PC), methacrylic resin, acrylonitrile / butadiene / styrene resin (ABS), polymethylpentene (PMP), and polystyrene (PA).
  • PE polyethylene
  • PP polypropylene
  • PC polycarbonate
  • methacrylic resin methacrylic resin
  • ABS acrylonitrile / butadiene / styrene resin
  • PMP polymethylpentene
  • PA polystyrene
  • At least one selected from the group consisting of polyethylene terephthalate (PET), melamine resin, phenolic resin, and unsaturated polyester resin can be used.
  • PET polyethylene terephthalate
  • melamine resin phenolic resin
  • unsaturated polyester resin unsaturated polyester resin
  • Fluororesin includes polytetrafluoroethylene (PTFE), tetrafluoroethylene (TFE) / hexafluoropropylene (HFP) copolymer (FEP), TFE / perfluoro (alkyl vinyl ether) (PAVE) copolymer (PFA) , Polyphenylene sulfide (PPS), ethylene (Et) / tetrafluoroethylene (TFE) copolymer, polychlorotrifluoroethylene (PCTFE), chlorotrifluoroethylene (CTFE) / TFE copolymer, Et / CTFE copolymer , Polyvinylidene fluoride (PVdF), TFE / vinylidene fluoride (VdF) copolymer, VdF / HFP copolymer, and polyvinyl fluoride (PVF) can be used. .
  • PTFE polytetrafluoroethylene
  • TFE tetraflu
  • TFE / HFP copolymer when describing as “TFE / HFP copolymer”, it is a copolymer including a polymerized unit based on TFE (TFE unit) and a polymerized unit based on HFP (HFP unit). Means.
  • a part of the sealing member to be compressed is a surface and is inclined with respect to the surface of the member to be compressed, the surface to be contacted before compression is not parallel.
  • transform flexibly and compress is preferable.
  • a perfluoropolymer which is a relatively flexible resin is preferable, and among them, PTFE, PFA, and FEP are preferable.
  • PAVE in PFA is preferably one having an alkyl group having 1 to 6 carbon atoms, more preferably perfluoromethyl vinyl ether (PMVE), perfluoro (ethyl vinyl ether) (PEVE) or perfluoropropyl vinyl ether (PPVE).
  • the PFA has a PAVE unit of more than 2% by mass and preferably 8% by mass or less, and more preferably 2.5 to 6% by mass.
  • the content of each monomer unit in these copolymers can be calculated by appropriately combining NMR, FT-IR, elemental analysis, and fluorescent X-ray analysis depending on the type of monomer (the same applies hereinafter). As long as the PFA has the above-mentioned composition, it may be obtained by polymerizing other monomers.
  • Examples of other monomers include HFP.
  • the content is preferably 1% by weight or less.
  • One or more of the other monomers can be used.
  • a TFE / PPVE copolymer is particularly preferable because of its excellent creep resistance.
  • the copolymer composition of PPVE is preferably 2.0% by weight to 5.0% by weight.
  • melt-flowable PTFE it is also possible to add melt-flowable PTFE, apparently lower the PPVE content, improve creep resistance, and reduce compression set.
  • the total PPVE content is preferably 1.0% by weight to 4.0% by weight. If the total PPVE content is less than 1% by weight, cracks are likely to occur, and if it exceeds 4% by weight, the effect of adding PTFE is reduced.
  • the sealing member when used as a gasket for a lithium ion battery, it is preferable that a material that hardly swells in a highly polar solvent and does not easily deteriorate due to contact is contained.
  • a highly polar solvent for example, LiCF 3 SO 3
  • LiClO 4 may be used in a nonaqueous solvent in which ethylene carbonate, propylene carbonate, 1,2-dimethoxyethane, dimethyl carbonate or diethyl carbonate is appropriately mixed. And non-aqueous electrolyte obtained by dissolving LiBF 4 and / or LiPF 6 .
  • ETFE or perfluoropolymer is preferable as a material that hardly swells in these polar solvents and hardly deteriorates due to contact, and among the perfluoropolymers, PTFE, PFA, and FEP are preferable.
  • PTFE perfluoropolymers
  • PFA perfluoropolymers
  • the sealing member contains PFA
  • the PFA content is preferably 50 wt% or more and 100 wt% or less, and the lower limit thereof is more preferably 70 wt% or more.
  • the above PTFE may be a TFE homopolymer or a modified PTFE.
  • modified PTFE is obtained by copolymerizing with TFE a small amount (1% by weight or less) of a comonomer (modifier) that does not impart melt processability to the resulting copolymer.
  • the modifier include perfluoroolefins such as HFP; chlorofluoroolefins such as CTFE; trifluoroethylene, perfluoroalkyl vinyl ethers, and the like.
  • TFE / VdF copolymer preferably has a TFE unit: VdF unit molar ratio of 45 to 85/55 to 15, more preferably 50 to 80/50 to 20.
  • the above-mentioned VdF / HFP copolymer preferably has a molar ratio of VdF units to HFP units of 45 to 85/55 to 15, more preferably 50 to 80/50 to 20, and still more preferably 60-80 / 40-20.
  • the VdF / HFP copolymer is a copolymer containing a polymer unit based on VdF and a polymer unit based on HFP, and may have a polymer unit based on another fluorine-containing monomer.
  • VdF / HFP / TFE copolymer is also a preferred form.
  • the VdF / HFP / TFE copolymer preferably has a VdF / HFP / TFE molar ratio of 40 to 80/10 to 35/10 to 25.
  • the melt flow rate (MFR) is preferably 40 g / 10 min or less, and preferably 10 g / 10 min or less, from the viewpoint that it is difficult to flow and the repulsive force is easily secured. More preferably, it is 3 g / 10 min or less.
  • MFR refers to the melt flow rate of the polymer at 372 ° C.
  • a melt index tester manufactured by Toyo Seiki Seisakusho
  • about 6 g of resin is maintained at 372 ° C.
  • the temperature reaches an equilibrium state, and then the resin is extruded through an orifice with a diameter of 2.1 mm and a length of 8 mm under a 5 kg piston load for a unit time (usually 10 to 60 seconds) ) Is measured three times for the same sample, and the average value is the value converted into the amount of extrusion per 10 minutes (unit: g / 10 minutes).
  • FEP fluororesins mentioned above, from the viewpoint of excellent melt processability, FEP, PFA, Et / TFE copolymer, PCTFE, CTFE / TFE copolymer, Et / CTFE copolymer, PVdF, TFE / VdF It is preferably at least one selected from the group consisting of a copolymer, a VdF / HFP copolymer, and PVF.
  • the sealing member of the present invention has a portion in which the compression ratio in the pressed direction is larger on the outside than on the inside, so that the sealing member is used. Even after a long time (for example, 200,000 hours) has passed, the repulsive force of the sealing member tends to remain, and the sealing effect can be maintained satisfactorily.
  • the sealing member 10 shown in FIG. 4 is an example in which the width in the penetration direction increases toward the outside, and both the upper surface 13 side and the lower surface 14 side are inclined at an inclination angle ⁇ with respect to the horizontal plane. is there.
  • the sealing member 10X shown in FIG. 5 has a shape in which the width in the penetrating direction increases toward the outside.
  • the upper surface 13x is inclined at an inclination angle ⁇ with respect to the horizontal plane, and the lower surface 14x is horizontal. This is an example of spreading upward.
  • the sealing member 10Y shown in FIG. 11 and the sealing member 10Z shown in FIG. 12 were used as comparative objects that are not the sealing member according to the present invention.
  • the sealing member 10Y shown in FIG. 11 has a shape in which the upper surface 13y is positioned downward and the lower surface 14y is positioned upward and the width in the penetrating direction decreases toward the outer side. Both are inclined at an inclination angle ⁇ with respect to the horizontal plane.
  • the sealing member 10Z shown in FIG. 12 has a lower surface 14z that spreads out on a horizontal plane, and the upper surface 13z has a shape in which the width in the penetrating direction decreases toward the outer side as it is located on the lower side, and the upper surface 13z. Is inclined at an inclination angle ⁇ with respect to the horizontal plane.
  • sealing members 10, 10X, 10Y, and 10Z used in the simulation are all annular, the inner penetrating portion is cylindrical, the inner diameter A is 6 mm, and the outer peripheral surface is also cylindrical. The same outer diameter B of 18 mm was used. Further, these sealing members 10, 10X, 10Y, and 10Z have a width C in the penetrating direction at the center position of the horizontal width (the intermediate position between the inner circumference and the outer circumference in the radial direction) of 5 mm. Made common.
  • the simulation is performed under the condition that the sealing member is pressed by a rigid body from both one side and the other side in the penetration direction by a member having a horizontally extending surface in an environment of 60 ° C. and held as it is. , Using ANSYS V14.5. The pressing is performed until the width C in the penetration direction at the center position of the horizontal width of the sealing member (the intermediate position between the inner circumference and the outer circumference in the radial direction) becomes 3 mm, and this 3 mm is maintained. did.
  • the materials of the sealing members 10, 10 X, 10 Y, and 10 Z used for the simulation are all “copolymers of tetrafluoroethylene and perfluoroalkyl vinyl ether”, and specifically, NEOFRON (registered trademark) PFA
  • the physical property values of AP-230 were used.
  • the MFR according to ASTM2.0D3307 is 2.0g / 10min
  • the melting point is 306 °C according to ASTM D4591
  • the specific gravity according to ASTM D3307 is 2.14.
  • the tensile strength according to ASTM D 3307 is 34.0 MPa
  • the elongation according to ASTM D 3307 is 320%.
  • the tensile modulus is 430 MPa.
  • the physical property value at 60 ° C used for the simulation is a value measured by changing only the measurement atmosphere temperature of ASTM D 307 3307 to 60 ° C, the tensile strength is 23.5 MPa, the elongation is 330%, the tensile modulus is 186.1 MPa, The yield stress was assumed to be 3.42 MPa. The Poisson's ratio was assumed to be 0.46.
  • the condition of the material used over time was determined using the creep characteristics of the PFA AP-230 used.
  • the creep characteristics were assumed to be expressed by a modified time hardening type creep model as shown in the following equation.
  • An AP230 11.3mm ⁇ ⁇ 10L test piece was cut from a compression-molded block, and the creep characteristics under load of 6.9MPa, 14MPa, 20MPa, 30MPa and 40MPa were measured at 60 °C.
  • C 1 , C 2 , C 3 , and C 4 were obtained by fitting the measured data to the following formula 1.
  • the coefficient of friction between the sealing member and the rigid body used for pressing from one side and the other side in the penetration direction was set to 0.1.
  • the diagram which shows the relationship between the nominal stress and the nominal strain shown in FIG. 13 was obtained by conducting a tensile test on the material used.
  • strain was obtained by calculating based on the diagram of FIG. And from these diagrams, simulation conditions for aged behavior analysis were obtained.
  • the outer periphery is An example in which the constraint condition was set so as not to spread outward and an example in which the spread at the outer periphery was free without using such a constraint member 20 were studied.
  • FIG. 15 shows a simulation result regarding the magnitude of the repulsive force after 200,000 hours of the sealing member when the inclination angles ⁇ and ⁇ are changed.
  • any sealing member 10, 10X, 10Y, 10Z more repulsive force remains after 200,000 hours when the restraining member 20 is used, and the sealing effect Is found to be good. Further, for the sealing members 10Y and 10Z whose thickness in the penetrating direction decreases toward the outside, the repulsive force remaining after 200,000 hours is not improved even if the inclination angle ⁇ increases. As for the sealing member 10X in which only the upper surface side is inclined, the repulsive force becomes slightly better as the inclination angle ⁇ increases, and the repulsive force becomes maximum within the range of the inclination angle of 15 degrees or more and 22 degrees or less.
  • the sealing member a member having a shape in which the thickness in the penetrating direction is increased toward the outer side and both the upper surface 13 and the lower surface 14 are inclined as in the case of the sealing member 10. It can be seen that it is desirable to be used in the presence of.
  • FIG. 16 shows a simulation result showing a change in the repulsive force according to the elapsed time from the start of use of the sealing member.
  • a flat plate-shaped plate having no inclination an example of “no inclination” was also used for comparison.
  • a simulation was performed on a material obtained by doubling the stress during the tensile test and the repulsion force of the creep.
  • the simulation was performed on the assumption that the amount of creep when the load twice the actual measurement was applied was the same.
  • simulation data was created on the assumption that twice as much stress as actually measured was generated for a certain amount of deformation.
  • FIG. 17 shows the simulation results of the temporal change of the repulsive force when the stress and creep repulsive force of the material used for the sealing member are 1 and 2 times.
  • the model with a repulsive force of 2 times is preferable at the beginning, but the difference between the repulsive force with the repulsive force of 1 time and that of the rebound force disappears in about 1 hour, and then it is rather 1 time. It was found that the repulsive force of the thing is largely maintained.
  • As a physical property value of the material of the sealing member there is a tensile elastic modulus as a physical property value highly dependent on the repulsive force.
  • the tensile elastic modulus at room temperature is 0.86 GPa in the model where the repulsive force is twice, and those having a tensile elastic modulus of 0.86 GPa are not preferable because the repulsive force is too large. Therefore, the tensile elastic modulus of the material is preferably smaller than 0.8 GPa and more preferably 0.7 GPa or less.
  • the conditions of each sealing member were as described above except for the conditions relating to the coefficient of friction with the member to be pressed.
  • the simulation result is shown in FIG. As this result shows, it became clear that the coefficient of friction with the pressing member in contact with the sealing member affects the magnitude of the repulsive force from the sealing member.
  • FIG. 19 The results of the simulation are shown in FIG. 19 for the state immediately after pressing, in FIG. 20 for the state after 10,000 hours have been pressed, and in FIG. 21 for the state after 100,000 hours have been pressed and 20
  • FIG. 19 to 22 show a part of the side cross section of the sealing member, the left side of the figure is the radially inner side, and the right side of the figure is the radially outer side.
  • FIGS. 19 to 22 different repulsive force regions are indicated by different hatchings.
  • the surface pressure value of the portion where the repulsive force is the maximum immediately after pressing is 37.7 MPa
  • the surface pressure value of the portion where the repulsive force is maximum after 10,000 hours with the pressure being pressed is 37.7 MPa
  • the surface pressure value of the portion where the repulsive force is maximum is 15.0 MPa when 100,000 hours have passed while pressing, and the repulsive force is maximum when 200,000 hours have passed with pressing.
  • the surface pressure of a certain part was 14.7 MPa.
  • the sealing member indicated by the alternate long and short dash line in which the upper surface and the lower surface are not inclined is pressed and deformed from the vertical direction (indicated by the alternate long and two short dashes line) ) Is maintained, it can be seen that the repulsive force outside the sealing member when 200,000 hours have elapsed has decreased.
  • the outer diameter of the portion around the radially outer side is longer by being expanded outward in the pressed state. It is considered that the repulsive force in the penetrating direction is likely to be weakened.
  • FIG. 23 shows an example of the state before pressing
  • FIG. 24 shows an example of the pressing usage state when the gasket 51 is used as a sealing member around the electrode of the battery.
  • a through portion penetrating in the vertical direction is provided in the upper cover 63 of the battery and the insulating cover 62 covering a part of the upper cover 63.
  • a caulking pin 61 that is used as an electrode or the like by caulking is provided in the penetrating portion.
  • the caulking pin 61 is made of metal and has a pin upper portion 61a and a pin lower portion 61b which are connected to each other and integrated.
  • the pin upper portion 61a of the caulking pin 61 has a cylindrical shape with an outer diameter smaller than the inner diameter of the penetrating portion, as shown in FIG. It has a shape extending in the vertical direction to the height above the upper lid 63 via the inside.
  • the pin lower portion 61b of the caulking pin 61 has a cylindrical shape with an outer diameter larger than the inner diameter of the penetrating portion, and further from the lower end of the pin upper portion 61a below the upper lid 63, as shown in FIG. It has a shape that extends downward.
  • the pin lower portion 61b of the caulking pin 61 is covered from the periphery in the radial direction by a restraining member 64 made of a highly rigid member.
  • the restraining member 64 is positioned by being fixed by another member (not shown) so as not to move relative to the upper lid 63, for example.
  • the gasket 51 is provided so as to be interposed between the upper lid 63, the insulating cover 62, the restraining member 64, and the caulking pin 61, and has an upper cylindrical portion 51a, a disc portion 51b, and a lower cylindrical portion 51c. ing.
  • the upper cylindrical portion 51a has an outer diameter that is slightly smaller than the inner diameter of the through portion inside the upper lid 63 and the insulating cover 62, and an inner diameter that is slightly larger than the outer diameter of the pin upper portion 61a of the caulking pin 61. It has a shape extending in the vertical direction from a height below 63 to a height above the upper lid 63 through the inside of the penetrating portion.
  • the upper cylindrical portion 51 a is interposed between the upper lid 63 and the insulating cover 62 and the pin upper portion 61 a of the caulking pin 61 to insulate them from each other.
  • the lower cylindrical portion 51 c has an inner diameter that is slightly larger than the outer diameter of the pin lower portion 61 b of the caulking pin 61 and an outer diameter that is slightly smaller than the inner diameter of the restraining member 64.
  • the restraint member 64 has a shape extending upward from the height position where the inner periphery of the restraining member 64 faces toward the lower surface of the upper lid 63.
  • the lower cylindrical portion 51 c is interposed between the pin lower portion 61 b of the caulking pin 61 and the restraining member 64 to insulate them from each other.
  • the disc portion 51b is a member that expands so as to connect the lower end outer peripheral portion of the upper cylindrical portion 51a and the lower cylindrical portion 51c upper end inner peripheral portion in the radial direction.
  • the radially outer end portion of the disc portion 51b has an outer upper flat surface portion that makes surface contact with the lower surface of the upper lid 63 and an outer lower flat portion that makes surface contact with the upper surface portion of the pin lower portion 61b of the caulking pin 61.
  • the radially inner portion of the outer upper flat portion and the outer lower flat portion has a configuration in which the upper surface and the lower surface are inclined so that the thickness in the vertical direction becomes thinner toward the radially inner side. Yes.
  • the thickness in the vertical direction is continuously reduced from the radially outer side toward the radially inner side until reaching the outer periphery of the lower end of the upper cylindrical portion 51a.
  • a portion where the thickness in the vertical direction is constant immediately before reaching the outer periphery of the lower end of the upper cylindrical portion 51a may be provided.
  • the ratio of the length in the radial direction between the portion where the outer upper plane portion and the outer lower plane portion are provided and the portion inside the portion is not particularly limited. However, for example, in the state before being caulked as shown in FIG. 23, the range of 1: 9 to 5: 5 is preferable.
  • the upper end of the pin upper portion 61a of the caulking pin 61 is moved downward with the gasket 51 being restrained from moving in the radial direction by the restraining member 64.
  • the pin upper portion 61a of the caulking pin 61 is crushed and deformed so as to cover the upper end of the upper cylindrical portion 51a of the gasket 51 from above as in the deformed pin upper portion 61a ′ shown in FIG.
  • the disc portion 51b of the gasket 51 is pressed from above and below by the lower surface portion of the upper lid 63 and the upper surface portion of the pin lower portion 61b of the caulking pin 61, and is deformed so that the thickness in the vertical direction is reduced.
  • the gasket 51 is fixed in a state in which it is pressed in the up-down direction while being constrained in the radial direction, and is in use.
  • the upper cylindrical portion 51a of the gasket 51 is also deformed so as to have a shorter vertical length.
  • the portion provided with the outer upper flat portion and the outer lower flat portion in the radial direction of the disc portion 51b of the gasket 51, and the inner portion of the portion is not particularly limited, but is preferably 7: 3 to 9.5: 1, for example.
  • the sealing member according to the present invention is particularly useful when used, for example, as a gasket or the like because a good sealing effect can be obtained even when used for a long time.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Gasket Seals (AREA)

Abstract

　L'invention porte sur un élément d'étanchéité, lequel élément est apte à produire un effet d'étanchéité satisfaisant même quand il est utilisé au cours d'une longue période de temps. Dans un élément d'étanchéité annulaire, l'élément d'étanchéité est utilisé en étant pressé tout à la fois à partir d'un côté et de l'autre côté dans une direction de passage traversant dans une partie de passage traversant interne, et l'élément d'étanchéité a une partie dans laquelle, quand l'élément d'étanchéité est pressé, le taux de compression dans la direction de pression est plus élevé sur le côté externe que sur le côté interne.
PCT/JP2015/055888 2014-02-28 2015-02-27 Élément d'étanchéité WO2015129866A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580010017.8A CN106068413B (zh) 2014-02-28 2015-02-27 密封部件
KR1020167024727A KR101856892B1 (ko) 2014-02-28 2015-02-27 밀봉 부재

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014039478 2014-02-28
JP2014-039478 2014-02-28

Publications (1)

Publication Number Publication Date
WO2015129866A1 true WO2015129866A1 (fr) 2015-09-03

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PCT/JP2015/055888 WO2015129866A1 (fr) 2014-02-28 2015-02-27 Élément d'étanchéité

Country Status (4)

Country Link
JP (1) JP6011657B2 (fr)
KR (1) KR101856892B1 (fr)
CN (1) CN106068413B (fr)
WO (1) WO2015129866A1 (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2020204163A1 (fr) * 2019-04-05 2020-10-08 ダイキン工業株式会社 Élément à comprimer pour dispositifs électrochimiques
WO2022168654A1 (fr) * 2021-02-05 2022-08-11 ダイキン工業株式会社 Élément d'étanchéité et batterie

Families Citing this family (4)

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TWI656241B (zh) 2014-11-10 2019-04-11 瑞士商億諾斯技術公司 襯墊、包含該襯墊之裝置及相關方法
TWI702138B (zh) * 2016-01-19 2020-08-21 日商大金工業股份有限公司 樹脂配管之捲取構造體、捲取構造體之製造方法、樹脂配管之敷設方法、及樹脂配管
CN110107689A (zh) * 2019-04-28 2019-08-09 厦门奥泉橡胶有限公司 侧面密封的密封圈
JP7248915B2 (ja) * 2020-09-11 2023-03-30 ダイキン工業株式会社 封止部材及び円筒型リチウムイオン電池

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JPH07228744A (ja) * 1994-02-19 1995-08-29 Nippon Pillar Packing Co Ltd フッ素系樹脂の摺動部材組成物
JPH1116548A (ja) * 1997-06-26 1999-01-22 Yodogawa Kasei Kk 二次電池用パッキンの製造法
JPH11201288A (ja) * 1998-01-14 1999-07-27 Purovakku:Kk ガスケット
JP2009212051A (ja) * 2008-03-06 2009-09-17 Fdk Energy Co Ltd ボビン形リチウム電池

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JPH02138574A (ja) * 1988-11-18 1990-05-28 Hitachi Ltd ガスケット
JP2002056827A (ja) * 2000-08-09 2002-02-22 Seiko Instruments Inc 非水電解質二次電池
CN2509384Y (zh) * 2001-10-24 2002-09-04 荣泰橡胶工业有限公司 管路或缆线的定位座的密封装置
JP6005363B2 (ja) * 2012-01-27 2016-10-12 三洋電機株式会社 リチウムイオン二次電池の製造方法

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JPH07228744A (ja) * 1994-02-19 1995-08-29 Nippon Pillar Packing Co Ltd フッ素系樹脂の摺動部材組成物
JPH1116548A (ja) * 1997-06-26 1999-01-22 Yodogawa Kasei Kk 二次電池用パッキンの製造法
JPH11201288A (ja) * 1998-01-14 1999-07-27 Purovakku:Kk ガスケット
JP2009212051A (ja) * 2008-03-06 2009-09-17 Fdk Energy Co Ltd ボビン形リチウム電池

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020204163A1 (fr) * 2019-04-05 2020-10-08 ダイキン工業株式会社 Élément à comprimer pour dispositifs électrochimiques
JPWO2020204163A1 (fr) * 2019-04-05 2020-10-08
JP7299525B2 (ja) 2019-04-05 2023-06-28 ダイキン工業株式会社 電気化学デバイス用被圧縮部材
WO2022168654A1 (fr) * 2021-02-05 2022-08-11 ダイキン工業株式会社 Élément d'étanchéité et batterie
JP2022120805A (ja) * 2021-02-05 2022-08-18 ダイキン工業株式会社 封止部材及び電池
JP7121325B1 (ja) 2021-02-05 2022-08-18 ダイキン工業株式会社 封止部材及び電池

Also Published As

Publication number Publication date
KR20160119202A (ko) 2016-10-12
KR101856892B1 (ko) 2018-05-10
CN106068413B (zh) 2018-08-07
CN106068413A (zh) 2016-11-02
JP2015178899A (ja) 2015-10-08
JP6011657B2 (ja) 2016-10-19

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