WO2020218623A1 - 蓄電デバイス用弁構造体 - Google Patents

蓄電デバイス用弁構造体 Download PDF

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Publication number
WO2020218623A1
WO2020218623A1 PCT/JP2020/018048 JP2020018048W WO2020218623A1 WO 2020218623 A1 WO2020218623 A1 WO 2020218623A1 JP 2020018048 W JP2020018048 W JP 2020018048W WO 2020218623 A1 WO2020218623 A1 WO 2020218623A1
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WO
WIPO (PCT)
Prior art keywords
container
passage
plane
valve structure
power storage
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2020/018048
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
美帆 佐々木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing Co Ltd
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 Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to CN202080031517.0A priority Critical patent/CN113785438B/zh
Priority to KR1020257011396A priority patent/KR20250057052A/ko
Priority to US17/604,004 priority patent/US12381285B2/en
Priority to KR1020217032932A priority patent/KR102892123B1/ko
Priority to JP2021516337A priority patent/JP7533449B2/ja
Priority to KR1020257011395A priority patent/KR20250053983A/ko
Priority to EP20795642.6A priority patent/EP3961746A4/en
Publication of WO2020218623A1 publication Critical patent/WO2020218623A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01G11/18—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors against thermal overloads, e.g. heating, cooling or ventilating
    • 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
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H01G11/80—Gaskets; Sealings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/08—Housing; Encapsulation
    • H01G9/12—Vents or other means allowing expansion
    • 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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • 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
    • 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
    • H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
    • H01M50/333—Spring-loaded vent valves
    • 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
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • 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
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/08—Cooling arrangements; Heating arrangements; Ventilating arrangements
    • 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 valve structure for a power storage device and a power storage device including the valve structure.
  • Patent Document 1 discloses a pouch-type lithium secondary battery.
  • a valve structure for venting gas is sandwiched between peripheral seals formed along the peripheral edge of a bag accommodating a battery element. This valve structure can suppress the shape of the bag from being deformed by discharging the gas generated in the bag.
  • Attachment of the valve structure to the peripheral seal portion as in Patent Document 1 is typically performed by sandwiching the valve structure with the packaging material constituting the bag and heat-sealing the valve structure together with the packaging material. .. Further, typically, the valve structure is conveyed to a processing position where heat sealing is performed in a state of being gripped by a gripping tool or the like included in the jig, and is fixed at the processing position during heat sealing.
  • the portion protruding from the peripheral seal portion to the outside of the bag is cylindrical. This makes it difficult to firmly grip the valve structure, so that, for example, it may be difficult to convey the valve structure to the machining position or fix it at the machining position, and thus the container of the valve structure. Can be difficult to attach to.
  • An object of the present invention is to provide a valve structure for a power storage device that can be easily attached to a container, and a power storage device including the valve structure.
  • the valve structure for a power storage device is a valve structure attached to a container, and has a casing formed with a passage for discharging gas generated inside the container to the outside of the container. It is provided with a valve mechanism that is held in the casing and allows the gas to pass to the outside of the container through the passage when the internal pressure of the container rises due to the gas generated inside the container. ..
  • the casing includes a first plane and a second plane parallel to the first plane.
  • the valve structure for a power storage device is a valve structure according to the viewpoint of A1, and the casing has a first air passage included in the passage and is generated inside the container. It includes a first portion fixed to the container so that the gas flows into the first air passage.
  • the valve structure for a power storage device is a valve structure according to the A2 viewpoint, and the casing is included in the passage and is located on the outer side of the container with respect to the first air passage. It has a second vent that has a second vent and holds the valve mechanism, and a third vent that is included in the passage and is located on the outer side of the container with respect to the first vent. It further includes a first plane and a third portion including the second plane.
  • the valve structure for a power storage device according to the A4 viewpoint of the present invention is the valve structure according to the A3 viewpoint, and the third vent is located on the inner side of the container with respect to the second vent.
  • the valve structure for a power storage device according to the A5 viewpoint of the present invention is a valve structure according to any one of the A2 viewpoints and the A4 viewpoints, and the first portion is viewed along the extending direction of the first air passage. When it is, it is non-circular.
  • the valve structure for a power storage device is a valve structure according to any one of the viewpoints A2 to A5, and the first portion is viewed along the extending direction of the first air passage. At that time, it has a first wing-shaped portion formed thinner toward the first direction from the central portion and a second wing-shaped portion formed thinner toward the second direction opposite to the first direction.
  • the valve structure for a power storage device according to the A7 viewpoint of the present invention is a valve structure according to the A6 viewpoint, and the first plane and the second plane are parallel or perpendicular to the first direction and the second direction. Is.
  • the power storage device is made of a packaging material, has a container having an internal space, a peripheral seal portion that defines the peripheral edge of the internal space, and a power storage housed in the internal space of the container. It includes a device element and a valve structure attached to the peripheral seal portion.
  • the valve structure is formed by a casing in which a passage for discharging gas generated inside the container to the outside of the container is formed, and the gas held in the casing and generated inside the container. It includes a valve mechanism for passing the gas to the outside of the container through the passage when the internal pressure of the container rises.
  • the casing includes a first plane and a second plane parallel to the first plane.
  • the power storage device according to the A9 viewpoint of the present invention is a power storage device according to the A8 viewpoint, and the first plane and the second plane are parallel or perpendicular to the direction in which the peripheral seal portion extends.
  • the valve structure for a power storage device is a valve structure attached to a container, and has a casing formed with a passage for discharging gas generated inside the container to the outside of the container. It is provided with a valve mechanism that is held in the casing and allows the gas to pass to the outside of the container through the passage when the internal pressure of the container rises due to the gas generated inside the container. ..
  • the casing has a first air passage included in the passage, and a first portion fixed to the container so that the gas generated inside the container flows into the first air passage, and the passage.
  • a second portion that has a second air passage located on the outer side of the container from the first air passage and holds the valve mechanism, and a second portion included in the passage and from the first air passage. Also has a third vent located on the outer side of the container and includes a first plane and a third portion including a second plane parallel to the first plane. The second portion does not have a pair of planes parallel to each other when viewed along the extending direction of the second air passage.
  • the valve structure for a power storage device according to the viewpoint B2 of the present invention is a valve structure for a power storage device according to the viewpoint B1, and the first portion thereof is viewed along the extending direction of the first air passage. It has a first wing-shaped portion formed thinner toward the first direction from the central portion, and a second wing-shaped portion formed thinner toward the second direction opposite to the first direction.
  • the valve structure for a power storage device is a valve structure attached to a container, and has a casing formed with a passage for discharging gas generated inside the container to the outside of the container. It is provided with a valve mechanism that is held in the casing and allows the gas to pass to the outside of the container through the passage when the internal pressure of the container rises due to the gas generated inside the container. ..
  • the casing has a first air passage included in the passage, and includes a first portion fixed to the container so that the gas generated inside the container flows into the first air passage.
  • a portion located on the outer side of the container with respect to the first portion includes a first plane and a second plane parallel to the first plane.
  • the first portion has a first wing-shaped portion formed thinner from the central portion toward the first direction when viewed along the extending direction of the first air passage, and a second portion opposite to the first direction. It has a second wing-shaped portion that is formed thinner toward the direction.
  • the valve structure for a power storage device according to the viewpoint B4 of the present invention is a valve structure for a power storage device according to the viewpoint B3, and the casing is included in the passage and is outside the container from the first air passage. It has a second vent that is located on the side and holds the valve mechanism, and a third vent that is included in the passage and is located on the outer side of the container from the first vent. The first plane and the third portion including the second plane are further included.
  • the valve structure for a power storage device according to the viewpoint B5 of the present invention is a valve structure for a power storage device according to the viewpoint B1, B2 or B4, and the third air passage is more of the container than the second air passage. Located on the inner side.
  • the valve structure for a power storage device according to the viewpoint B6 of the present invention is a valve structure for a power storage device according to any one of the viewpoints B1 to B5, and the first portion thereof is along the extending direction of the first air passage. When viewed, it is non-circular.
  • the valve structure for a power storage device according to the viewpoint B7 of the present invention is a valve structure for a power storage device according to any one of the viewpoints B2 to B4, and the first plane and the second plane are the first direction and the first plane. It is parallel or perpendicular to the second direction.
  • the power storage device is made of a packaging material, has a container having an internal space, a peripheral seal portion that defines the peripheral edge of the internal space, and a power storage housed in the internal space of the container. It includes a device element and a valve structure attached to the peripheral seal portion.
  • the valve structure is formed by a casing in which a passage for discharging gas generated inside the container to the outside of the container is formed, and the gas held in the casing and generated inside the container. It includes a valve mechanism for passing the gas to the outside of the container through the passage when the internal pressure of the container rises.
  • the casing has a first air passage included in the passage, and a first portion fixed to the container so that the gas generated inside the container flows into the first air passage, and the passage.
  • a second portion that has a second air passage located on the outer side of the container from the first air passage and holds the valve mechanism, and a second portion included in the passage and from the first air passage.
  • the power storage device is made of a packaging material, has a container having an internal space, a peripheral seal portion that defines the peripheral edge of the internal space, and a power storage housed in the internal space of the container. It includes a device element and a valve structure attached to the peripheral seal portion.
  • the valve structure is formed by a casing in which a passage for discharging gas generated inside the container to the outside of the container is formed, and the gas held in the casing and generated inside the container. It includes a valve mechanism for passing the gas to the outside of the container through the passage when the internal pressure of the container rises.
  • the casing has a first air passage included in the passage, and includes a first portion fixed to the container so that the gas generated inside the container flows into the first air passage.
  • a portion located on the outer side of the container with respect to the first portion includes a first plane and a second plane parallel to the first plane.
  • the first portion has a first wing-shaped portion formed thinner from the central portion toward the first direction when viewed along the extending direction of the first air passage, and a second portion opposite to the first direction. It has a second wing-shaped portion that is formed thinner toward the direction.
  • the power storage device according to the B10 viewpoint of the present invention is a power storage device according to the B8 or B9 viewpoint, and the first plane and the second plane are parallel or perpendicular to the direction in which the peripheral seal portion extends.
  • the casing of the valve structure for a power storage device includes a pair of planes (first plane and second plane) parallel to each other.
  • a pair of planes makes it easier to grip the valve structure, which allows, for example, the valve structure to be easily transported to the machining position or easily fixed at the machining position. As a result, the valve structure can be easily attached to the container.
  • FIG. 1 is a sectional view taken along line II-II of FIG. Top view of the valve structure.
  • FIG. 4 is a sectional view taken along line VI-VI of FIG.
  • FIG. 3 is a sectional view taken along line VII-VII of FIG.
  • FIG. 3 is a cross-sectional view of a valve structure according to still another modification.
  • FIG. 3 is a cross-sectional view of a valve structure according to still another modification.
  • FIG. 3 is a cross-sectional view of a valve structure according to still another modification.
  • FIG. 14 is a cross-sectional view taken along the line XV-XV of FIG.
  • valve structure for a power storage device according to an embodiment of the present invention and a power storage device including the valve structure will be described with reference to the drawings.
  • FIG. 1 shows a plan view of the power storage device 1 according to the present embodiment.
  • FIG. 2 is a sectional view taken along line II-II of FIG.
  • the parts that are originally invisible from the outside are partially shown by dotted lines for reference.
  • the vertical direction of FIG. 1 is referred to as "front and back”
  • the horizontal direction is referred to as “left and right”
  • the vertical direction of FIG. 2 is referred to as "up and down”.
  • the orientation of the power storage device 1 when used is not limited to this.
  • the power storage device 1 includes a housing 101 and a power storage device element 400 housed therein.
  • the container 101 includes a container 100, and a tab 300 and a tab film 310 attached to the container 100.
  • the power storage device element 400 is housed in the internal space S1 of the container 100.
  • the container 100 is composed of packaging materials 110 and 120.
  • the packaging materials 110 and 120 are heat-sealed and fused to each other, whereby the peripheral seal portion 130 is formed.
  • the peripheral space S1 of the container 100 that is shielded from the external space is formed by the peripheral seal portion 130.
  • the peripheral edge sealing portion 130 defines the peripheral edge of the internal space S1 of the container 100.
  • the mode of heat sealing referred to here is assumed to be a mode of heat welding from a heat source, ultrasonic welding, and the like.
  • the peripheral seal portion 130 means a portion where the packaging materials 110 and 120 are fused and integrated.
  • the packaging materials 110 and 120 are made of, for example, a resin molded product or a film.
  • the resin molded product referred to here can be manufactured by a method such as injection molding, compressed air molding, vacuum forming, blow molding, or the like, and in-mold molding may be performed in order to impart designability and functionality.
  • the type of resin may be polyolefin, polyester, nylon, ABS, or the like.
  • the film referred to here is, for example, a plastic film that can be manufactured by a method such as an inflation method or a T-die method, or a film obtained by laminating these plastic films on a metal foil. Further, the film referred to here may or may not be stretched, and may be a single-layer film or a laminated film. Further, the laminated film referred to here may be produced by a coating method, a plurality of films bonded by an adhesive or the like, or may be produced by a multilayer extrusion method.
  • the packaging materials 110 and 120 can be variously composed, but in the present embodiment, they are composed of a laminated film.
  • the laminated film can be a laminated body in which a base material layer, a barrier layer and a thermosetting resin layer are laminated.
  • the base material layer functions as a base material for the packaging materials 110 and 120, and is typically a resin layer that forms the outer layer side of the container 100 and has an insulating property.
  • the barrier layer has a function of improving the strength of the packaging materials 110 and 120 and also preventing at least moisture or the like from entering the power storage device 1, and is typically a metal layer made of an aluminum alloy or the like.
  • the thermosetting resin layer is typically made of a thermosetting resin such as polyolefin, and forms the innermost layer of the container 100.
  • the shape of the container 100 is not particularly limited, and can be, for example, a bag shape (pouch shape).
  • the bag shape referred to here may be a three-way seal type, a four-way seal type, a pillow type, a gusset type, or the like.
  • the container 100 of the present embodiment has the shape as shown in FIG. 2, and the packaging material 110 molded in a tray shape and the packaging material 120 also molded in a tray shape and superposed on the packaging material 110. Is manufactured by heat-sealing along the outer peripheral portion in a plan view.
  • the packaging material 110 includes an annular flange portion 114 corresponding to an outer peripheral portion in a plan view, and a molding portion 112 that is continuous with the inner edge of the flange portion 114 and bulges downward from the flange portion 114.
  • the packaging material 120 includes an annular flange portion 124 corresponding to an outer peripheral portion in a plan view, and a molded portion 122 that is continuous with the inner edge of the flange portion 124 and bulges upward from the flange portion 124.
  • the packaging material 110 and the packaging material 120 are superposed so that the molded portions 112 and 122 respectively bulge in opposite directions.
  • the flange portion 114 of the packaging material 110 and the flange portion 124 of the packaging material 120 are heat-sealed so as to be integrated to form the peripheral seal portion 130.
  • the peripheral edge sealing portion 130 extends over the entire outer circumference of the container 100 and is formed in an annular shape.
  • One of the packaging material 110 and the packaging material 120 may be in the form of a sheet.
  • the power storage device element 400 is, for example, a power storage member such as a lithium ion battery (secondary battery) or a capacitor, and includes an electrolytic solution.
  • gas may be generated in the internal space S1 of the container 100.
  • the primary battery or the secondary battery may be housed in the container 100, but the secondary battery is preferably housed.
  • the type of the secondary battery housed in the container 100 is not particularly limited, and for example, in addition to the lithium ion battery, a lithium ion polymer battery, an all-solid-state battery, a lead storage battery, a nickel / hydrogen storage battery, a nickel / cadmium storage battery, and nickel.
  • the power storage device element 400 When the power storage device element 400 is a capacitor, gas may be generated in the internal space S1 of the container 100 due to a chemical reaction in the capacitor. Further, when the power storage device 1 is an all-solid-state battery, the power storage device element 400 may include a solid electrolyte that can generate gas. For example, when the solid electrolyte is sulfide-based, hydrogen sulfide gas can be generated.
  • the tab 300 is a metal terminal used for input / output of electric power in the power storage device element 400.
  • the tabs 300 are separately arranged at the left and right end portions of the peripheral edge seal portion 130 of the container 100, one of which constitutes a terminal on the positive electrode side and the other of which constitutes a terminal on the negative electrode side.
  • One end of each tab 300 in the left-right direction is electrically connected to an electrode (positive electrode or negative electrode) of the power storage device element 400 in the internal space S1 of the container 100, and the other end is a peripheral seal portion 130. It protrudes outward from.
  • the above-described form of the power storage device 1 is particularly preferable for use in an electric vehicle such as an electric vehicle or a hybrid vehicle in which a large number of power storage devices 1 are connected in series and used at a high voltage.
  • the mounting positions of the two tabs 300 that form the terminals of the positive electrode and the negative electrode are not particularly limited, and may be arranged on the same side of the peripheral seal portion 130, for example.
  • the metal material constituting the tab 300 is, for example, aluminum, nickel, copper, or the like.
  • the tab 300 connected to the positive electrode is typically made of aluminum or the like, and the tab 300 connected to the negative electrode is typically copper, nickel or the like. Consists of.
  • the tab 300 on the left side is sandwiched between the packaging materials 110 and 120 via the tab film 310 at the left end portion of the peripheral seal portion 130.
  • the tab 300 on the right side is also sandwiched between the packaging materials 110 and 120 via the tab film 310 at the right end portion of the peripheral sealing portion 130.
  • the tab film 310 is a so-called adhesive film, and is configured to adhere to both the packaging materials 110 and 120 and the tab 300 (metal). By passing through the tab film 310, even if the tab 300 and the innermost layers (thermosetting resin layers) of the packaging materials 110 and 120 are different materials, both can be fixed.
  • the accommodating body 101 includes a valve structure 200 as a mechanism for preventing such a situation.
  • the valve structure 200 is a gas vent valve for adjusting the pressure in the internal space S1, and is attached to the peripheral seal portion 130 of the container 100.
  • the configuration of the valve structure 200 will be described in detail.
  • FIG. 3 is a plan view of the valve structure 200.
  • the valve structure 200 has a casing 201, and the casing 201 includes a first portion 10, a second portion 20, and a third portion 30.
  • these portions 10 to 30 are continuous in the order from the inside to the outside of the container 100 (the direction from the back side to the front side) in the order of the first part 10, the third part 30, and the second part 20.
  • FIG. 4 is a view of the valve structure 200 viewed from the first portion 10 side (from the rear side)
  • FIG. 5 is a view of the valve structure 200 viewed from the second portion 20 side (from the front side). ..
  • the valve structure 200 of the present embodiment is a check valve capable of repeatedly venting gas, and is particularly a ball spring type check valve.
  • the valve structure 200 is a relief valve that switches between an open state and a closed state according to the pressure in the internal space S1.
  • a passage L1 is formed inside the casing 201.
  • the passage L1 has an inlet O1 facing the internal space S1 of the container 100 and an outlet O2 facing the external space.
  • the passage L1 allows the internal space S1 of the container 100 to communicate with the external space in the open state of the valve structure 200, and the gas generated in the internal space S1 can be discharged to the outside of the container 100.
  • the valve structure 200 is opened when the pressure in the internal space S1 rises due to the gas generated in the internal space S1. On the other hand, the valve structure 200 seals the internal space S1 from the external space in the closed state.
  • the first part 10 is a part for attaching the valve structure 200 to the container 100.
  • the first portion 10 is heat-sealed together with the packaging materials 110 and 120 when the container 100 is molded. By this heat seal, the outer peripheral surface of the first portion 10 and the packaging materials 110 and 120 are fused and joined, and the first portion 10 is sandwiched between the packaging materials 110 and 120 to the peripheral seal portion 130. It is fixed (see FIG. 2).
  • the third portion 30 is arranged outside the peripheral seal portion 130 and is not sandwiched between the packaging materials 110 and 120 (see FIGS. 1 and 2). Further, the second portion 20 arranged further outside the third portion 30 is also arranged outside the peripheral edge sealing portion 130, and is not sandwiched between the packaging materials 110 and 120. As a result, the heat generated when the first portion 10 is attached to the container 100 by the heat seal reduces the possibility that various parts that are held in the second portion 20 and constitute the valve mechanism, which will be described later, are destroyed due to deformation or the like. To.
  • the first part 10, the second part 20, and the third part 30 extend coaxially with each other and parallel to each other in the front-rear direction (including the case where they are substantially parallel; the same applies hereinafter).
  • the central axis common to these portions 10 to 30 is represented by reference numeral C1.
  • the first portion 10 has a first vent passage A1
  • the second portion 20 has a second vent passage A2
  • the third portion 30 has a third vent passage A3.
  • These ventilation paths A1 to A3 also extend coaxially with each other and parallel to each other in the front-rear direction with the central axis C1 as the central axis.
  • the inlet O1 and the outlet O2 are arranged not on the outer peripheral surface of the casing 201 but on the end surface in the front-rear direction.
  • the central axis C1 extending linearly in the front-rear direction is the inlet O1 and the outlet O2. Pass through the center.
  • the cross section of the ventilation passages A1 to A3 orthogonal to the central axis C1 is circular.
  • the ventilation passages A1 to A3 communicate with each other and form the passage L1 as a whole.
  • the third air passage A3 is arranged on the outer side of the container 100 from the first air passage A1, and the second air passage A2 is arranged on the outer side of the container 100 further than the third air passage A3.
  • the third air passage A3 is arranged on the inner side of the container 100 than the second air passage A2, and the first air passage A1 is arranged on the inner side of the container 100 further than the third air passage A3. ..
  • the outer shape of the second portion 20 is generally a cylindrical shape with the central axis C1 as the central axis.
  • the outer shape of the third portion 30 has a shape in which a part of a cylinder with the central axis C1 as the central axis is cut out. More specifically, the outer shape of the third portion 30 is generally a plane having a central axis C1 as the central axis, cut out in a plane separated from the central axis C1 by a certain distance, and the plane with respect to the central axis C1. It has a shape that is further cut out on a plane that is symmetrical with the above.
  • the third portion 30 has a pair of planes D1 and D2.
  • the plane represented by D1 may be referred to as a first plane
  • the plane represented by D2 may be referred to as a second plane.
  • the first plane D1 and the second plane D2 are parallel to each other (including the case where they are substantially parallel; the same applies hereinafter).
  • the first plane D1 and the second plane D2 are parallel to the extending direction of the central axis C1 (including a case where they are substantially parallel; the same applies hereinafter).
  • the first plane D1 and the second plane D2 are parallel to the direction in which the peripheral edge sealing portion 130 extends (including the case where they are substantially parallel; the same applies hereinafter).
  • the outer peripheral surface of the third portion 30 is composed of a first plane D1 and a second plane D2, and curved surfaces D3 and D4 connecting these planes D1 and D2.
  • the curved surfaces D3 and D4 each have an arc shape centered on the central axis C1 when viewed along the extending direction of the central axis C1, and overlap the outer shape of the second portion 20.
  • the second portion 20 as described above can be formed by cutting the outer peripheral surface of the cylindrical member so that a pair of planes D1 and D2 are formed.
  • the first portion 10 has a non-circular outer shape when viewed along the extending direction of the central axis C1. More specifically, the first portion 10 has a first wing-shaped portion 41 formed thinner toward the left from the central portion in the left-right direction when viewed along the extending direction of the central axis C1 and to the right. It has a second wing-shaped portion 42 formed thinner toward the direction. Therefore, in the present embodiment, the first portion 10 becomes thicker as it approaches the central portion in the width direction (horizontal direction) of the power storage device 1, and becomes thinner as it approaches the end portion in the width direction (horizontal direction) of the power storage device 1. ..
  • the wing-shaped portions 41 and 42 provide a smooth curved surface on the outer peripheral surface of the first portion 10 in both the lower half covered with the packaging material 110 and the upper half covered with the packaging material 120, respectively. I'm drawing. Further, as compared with the case where the first portion 10 is formed in a cylindrical shape by the wing-shaped portions 41 and 42, for example, the peripheral seal portion 130 from the portion where the first portion 10 is not sandwiched to the peripheral seal portion 130 is the third. At the position where the portion 10 shifts to the sandwiched portion, the change in the thickness of the power storage device 1 in the vertical direction becomes smooth. As a result, since no excessive force is applied to the packaging materials 110 and 120 in the peripheral portion of the peripheral seal portion 130 at the position where the first portion 10 is attached, the first portion 10 is firmly fixed to the peripheral seal portion 130. can do.
  • the outer shapes of the first portion 10, the second portion 20, and the third portion 30 are assigned to the respective portions when viewed along the extending direction of the central axis C1. Each has a different shape depending on the above.
  • the second part 20 holds the valve mechanism.
  • the valve mechanism second vents the gas that has passed through the first air passage A1 and the third air passage A3 when the pressure in the internal space S1 rises due to the gas generated in the internal space S1 of the container 100. It is passed to the outside of the container 100 through the path A2. That is, the second portion 20 holds a portion having a main structure for exerting the function of the valve structure 200 as a gas vent valve.
  • the spring 212, the ball 213, and the valve seat 214 as the valve mechanism are housed in the second ventilation passage A2 inside the second portion 20.
  • An insertion portion 215 continuous with the third portion 30 is also housed in the second ventilation passage A2.
  • portions 212 to 215 are arranged in this order from the outlet O2 to the inlet O1 in the second air passage A2.
  • the second portion 20, the valve seat 214, and the insertion portion 215 are configured as separate parts, but at least a part of them may be integrally configured.
  • the insertion portion 215 is integrally configured with the third portion 30 and the first portion 10, but at least a part thereof is configured as a separate component. May be done.
  • the valve seat 214 receives the ball 213 as a valve body urged from the outside by the spring 212, and at this time, the closed state of the valve structure 200 is formed.
  • the spring 212 is a coil spring in the examples of FIGS. 6 and 7, but the spring 212 is not limited to this, and may be, for example, a leaf spring.
  • the first portion 10 is fixed to the peripheral seal portion 130 so that the gas generated in the internal space S1 of the container 100 flows into the first ventilation passage A1. That is, the first air passage A1 inside the first portion 10 communicates with the internal space S1 of the container 100. Therefore, when the pressure in the internal space S1, that is, the pressure in the first air passage A1 and the third air passage A3 communicating with the first air passage A1 reaches a predetermined pressure, the pressure flows out from the internal space S1 and the first air passage A1 and the first air passage A1 and the first air passage A1 and the third air passage A1 3 The gas that has passed through the ventilation path A3 pushes the ball 213 toward the outlet O2.
  • the valve structure 200 can prevent the ingress of air into the internal space S1 of the container 100 in the closed state. On the other hand, even in the open state, it is unlikely that the atmosphere will enter the internal space S1. This is because, in the open state, the pressure in the internal space S1 is maintained higher than or equivalent to the pressure in the external space. Therefore, the valve structure 200 can effectively prevent the entry of the atmosphere into the container 100, and can prevent the power storage device element 400 from being deteriorated by the moisture contained therein.
  • each part of the valve structure 200 is not particularly limited.
  • the ball 213 can be made of fluororesin and the valve seat 214 can be made of fluororubber.
  • the spring 212 may be made of a metal such as stainless steel
  • the first portion 10, the second portion 20, the third portion 30 and the insertion portion 215 may be made of a metal such as an aluminum alloy, stainless steel, a steel plate, or titanium.
  • the first portion 10 may be composed of a material that directly adheres to the innermost layers of the packaging materials 110 and 120.
  • the first portion 10 can be made of a material having the same heat-sealing properties as the innermost layers of the packaging materials 110 and 120, for example, a resin such as polyolefin. If the first portion 10 cannot be made of the above materials due to heat resistance or the like, for example, if the first portion 10 is made of metal, the first portion 10 and the packaging materials 110 and 120 are the most suitable. These can be bonded via a film that can be bonded to both the inner layer.
  • the method of fixing the valve seat 214 and the casing 201 is not particularly limited, and for example, a rubber valve seat 214 can be baked onto the casing 201.
  • the valve seat 214 and the insertion portion 215 can also be adhered with an adhesive.
  • the material of the adhesive here is not particularly limited, but a curing type adhesive can be preferably used.
  • a preferred example of the case where the valve seat 214 is made of fluororubber and the insertion portion 215 is made of a metal such as aluminum can be made of an acid-modified polyolefin or an epoxy resin.
  • Such an adhesive is superior in that it can suppress deterioration of the adhesive performance due to the electrolytic solution, as compared with the case where, for example, an adhesive made of a modified silicone resin is used.
  • the adhesive can be appropriately applied to various other places. For example, an adhesive can be applied between the rear end face of the second portion 20 and the front end face of the third portion 30.
  • the curable type adhesive referred to here includes a resin containing a polyolefin skeleton such as polyolefin and acid-modified polyolefin, a compound having an isocyanate group, a compound having an oxazoline group, and a compound having an epoxy group. It is preferable to include at least one selected from the group consisting of, and particularly preferably to contain at least one selected from the group consisting of an acid-modified polyolefin and a compound having an isocyanate group and a compound having an epoxy group. ..
  • the resin constituting the adhesive layer formed by the adhesive contains a polyolefin skeleton can be analyzed by, for example, infrared spectroscopy, gas chromatography-mass spectrometry, or the like. Further, when the resin constituting the adhesive layer is analyzed by infrared spectroscopy, it is preferable that a peak derived from maleic anhydride is detected. For example, when the maleic anhydride-modified polyolefin is measured by infrared spectroscopy, peaks derived from maleic anhydride are detected in the vicinity of wave number 1760 cm-1 and wave number 1780 cm-1.
  • the adhesive layer is a layer composed of maleic anhydride-modified polyolefin
  • a peak derived from maleic anhydride is detected when measured by infrared spectroscopy.
  • the peak may become small and may not be detected. In that case, it can be analyzed by nuclear magnetic resonance spectroscopy.
  • polystyrene resin examples include polyethylenes such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, and linear low-density polyethylene; ethylene- ⁇ -olefin copolymers; homopolypropylene and block copolymers of polypropylene (for example, with propylene).
  • Polypropylene such as (block copolymer of ethylene), random copolymer of polypropylene (for example, random copolymer of propylene and ethylene); propylene- ⁇ -olefin copolymer; terpolymer of ethylene-butene-propylene and the like.
  • polypropylene is preferable.
  • the polyolefin resin may be a block copolymer or a random copolymer.
  • One type of these polyolefin resins may be used alone, or two or more types may be used in combination.
  • the polyolefin may be a cyclic polyolefin.
  • the cyclic polyolefin is a copolymer of an olefin and a cyclic monomer, and examples of the olefin which is a constituent monomer of the cyclic polyolefin include ethylene, propylene, 4-methyl-1-pentene, styrene, butadiene, and isoprene. Be done.
  • cyclic monomer which is a constituent monomer of the cyclic polyolefin examples include cyclic alkenes such as norbornene; cyclic diene such as cyclopentadiene, dicyclopentadiene, cyclohexadiene, and norbornadiene. Among these, cyclic alkene is preferable, and norbornene is more preferable.
  • the acid-modified polyolefin is a polymer modified by block polymerization or graft polymerization of polyolefin with an acid component.
  • the acid-modified polyolefin the above-mentioned polyolefin, a copolymer obtained by copolymerizing the above-mentioned polyolefin with a polar molecule such as acrylic acid or methacrylic acid, or a polymer such as a crosslinked polyolefin can also be used.
  • the acid component used for acid modification include carboxylic acids such as maleic acid, acrylic acid, itaconic acid, crotonic acid, maleic anhydride, and itaconic anhydride, or anhydrides thereof.
  • the acid-modified polyolefin may be an acid-modified cyclic polyolefin.
  • the acid-modified cyclic polyolefin is a polymer obtained by copolymerizing a part of the monomers constituting the cyclic polyolefin in place of the acid component, or by block-polymerizing or graft-polymerizing the acid component with the cyclic polyolefin. is there.
  • the acid component used for the acid modification is the same as the acid component used for the modification of the polyolefin.
  • Preferred acid-modified polyolefins include polyolefins modified with carboxylic acid or its anhydride, polypropylene modified with carboxylic acid or its anhydride, maleic anhydride-modified polyolefin, and maleic anhydride-modified polypropylene.
  • the surface of the first portion 10 is coated with a corrosion inhibitor to form a corrosion preventive coating layer, particularly from the viewpoint of electrolytic solution resistance.
  • a corrosion inhibitor to form a corrosion preventive coating layer, particularly from the viewpoint of electrolytic solution resistance.
  • the first portion 10 is made of a metal such as aluminum, but it can also be applied when the first portion 10 is made of another material.
  • Such a coating is applied by immersing the first portion 10 in a liquid of a corrosion inhibitor, and then drying, baking, or electrically adhering the corrosion inhibitor adhering to the surface of the first portion 10. Can be done.
  • a corrosion prevention coating layer can be formed on the outer surface of the first portion 10 and the inner surface facing the first air passage A1, corrosion of the outer surface by the released gas, and the first air passage A1.
  • the same coating is applied not only to the first portion 10 but also to the surfaces of the third portion 30, the second portion 20 and the insertion portion 215 to form a corrosion prevention coating layer. You may. However, from the viewpoint of suppressing deterioration of the adhesive performance between the first portion 10 and the packaging materials 110 and 120 due to the electrolytic solution, it is meaningful to apply such a coating particularly to the first portion 10.
  • the material of the corrosion inhibitor is not particularly limited, but an acid-resistant material is preferable, and the corrosion inhibitor film layer can be formed by phosphoric acid chromate treatment or the like.
  • the electrolytic solution resistance referred to in this paragraph may mean, for example, the corrosion resistance of the metal itself when the portion where the corrosion prevention coating layer is formed is made of metal.
  • the electrolytic solution resistance referred to here means that when the first portion 10 is made of metal and a film is interposed between the first portion 10 and the innermost layers of the packaging materials 110 and 120, the first portion It can mean the property of preventing the interface between the metal surface of 10 and the film from being peeled off by the electrolytic solution.
  • valve structure 200 a method of attaching the valve structure 200 to the container 100 will be described.
  • the packaging materials 110 and 120 are fixed to face each other by a fixture (not shown).
  • the valve structure 200 is gripped by the gripping tool 501 of the jig 500 (see FIG. 8A).
  • the valve structure 200 is in such a manner that the gripping tool 501 firmly contacts the first plane D1 and the second plane D2 of the third portion 30 and the third portion 30 is firmly sandwiched by the gripping tool 501. Be grasped.
  • the molded portions 112 and 122 of the packaging materials 110 and 120 are not particularly shown in order to focus on the description of the attachment of the valve structure 200, but the molded portions 112 and 122 are shown. It is appropriately formed before, during, or after mounting the valve structure 200.
  • the jig 500 is driven, the valve structure 200 gripped by the gripping tool 501 moves, and the first portion 10 is inserted into the gaps between the packaging materials 110 and 120 facing each other (see FIG. 8B). ).
  • the valve structure 200 is moved so that the third portion 30 does not enter the same gap. Therefore, the first portion 10 is sandwiched between the outer peripheral portions of the packaging materials 110 and 120. Further, at this time, the valve structure 200 is moved so that the portion of the packaging materials 110 and 120 that becomes the peripheral edge sealing portion 130 and the first plane D1 and the second plane D2 of the third portion 30 are parallel to each other. ..
  • the pair of heated seal bars 600 sandwich the outer peripheral portions of the packaging materials 110 and 120 from the outside (see FIG. 8C).
  • the outer peripheral portions of the packaging materials 110 and 120 receive heat from the seal bar 600 and are fused to form the peripheral seal portion 130.
  • the valve structure 200 is fixed to the peripheral seal portion 130 so that only the first portion 10 of the valve structure 200 is sandwiched between the packaging materials 110 and 120.
  • the wing-shaped portions 41 and 42 included in the first portion 10 are fixed so that the line connecting the sharp ends thereof is not inclined with respect to the extending direction (left-right direction) of the peripheral edge sealing portion 130.
  • the pair of seal bars 600 retracts to a predetermined position, and the gripping tool 501 releases the valve structure 200 and retracts to a predetermined position.
  • the gripping tool 501 can firmly grip the valve structure 200 by the pair of parallel first planes D1 and second plane D2. Therefore, the valve structure 200 can be accurately transported to a desired position with respect to the packaging materials 110 and 120. Further, during the heat sealing process, the valve structure 200 can be firmly fixed to the packaging materials 110 and 120 at a desired position. That is, the valve structure 200 can be accurately aligned with the container 100.
  • the alignment referred to here includes adjusting the phase around the central axis C1 of the valve structure 200. That is, the angle around the central axis C1 of the first portion 10 with respect to the peripheral seal portion 130 of the container 100 can be accurately adjusted. According to the above configuration, the valve structure 200 can be easily attached to the container 100.
  • the valve structure 200 of the above embodiment is a ball spring type, but is not limited to this, and may be, for example, a poppet type, a duck bill type, an umbrella type, a diaphragm type, or the like. Further, the valve structure 200 of the above embodiment is a check valve capable of repeatedly degassing, but may be a destructive valve capable of degassing only once. It may also include both a check valve and a break valve. Further, the valve body included in the valve structure 200 of the above embodiment is a spherical ball 213, but the shape is not limited to such a shape, and various shapes are adopted as long as the valve body functions as a valve body. be able to.
  • the valve body may be hemispherical, oblong, or oblate.
  • the spherical side may be received by the valve seat 214, and a columnar member may extend from the central portion of the flat surface opposite to the spherical surface to the opposite side to the spherical surface.
  • the position of the valve body in the casing 211 can be stabilized by configuring the columnar member to be received inside the spring 212.
  • the break valve referred to in this modification can be configured in various ways.
  • the break valve can be configured by a thin plate or film 250 as a valve mechanism, in which the casing 201 is held so as to block the passage L1 in the valve structure 200.
  • This destructive valve (hereinafter, the destructive valve is designated by the reference numeral 250) can be configured, for example, by attaching a laminate film to the casing 201 by heat sealing so as to cover the outlet O2.
  • the breaking valve 250 may be a thin plate made of metal such as aluminum, and as shown in FIG.
  • a notch 251 extending radially from the vicinity of the center thereof may be formed in the thin plate.
  • the notch portion 251 does not penetrate the break valve 250 in the thickness direction, and is formed thinner than other portions.
  • the breaking valve 250 can be opened by breaking the breaking valve 250 instead of dropping it from the casing 201.
  • the first plane D1 and the second plane D2 of the third portion 30 do not have to be parallel to the direction in which the peripheral edge sealing portion 130 extends, and can face various directions. However, from the viewpoint of workability when the valve structure 200 is attached to the container 100, it is either parallel to the extending direction (left-right direction) of the peripheral seal portion 130 or vertical (substantially vertical) as shown in FIG. Including certain cases. The same shall apply hereinafter.).
  • the third portion 30 is arranged closer to the inner side of the container 100 than the second portion 20, but as shown in FIG. 11, the third portion 30 is arranged closer to the outer side of the container 100 than the second portion 20. May be good.
  • the shape of the first portion 10 is not limited to that described above.
  • the outer shape of the first portion 10 may be non-circular as shown in FIGS. 12A and 12B when viewed along the extending direction of the first air passage A1.
  • the outer shape of the first portion 10 may be circular or elliptical as shown in FIG. 12C when viewed along the extending direction of the first air passage A1.
  • the shape of the second portion 20 is not limited to that described above, and the outer shape of the second portion 20 may be non-circular when viewed along the extending direction of the central axis C1, for example, an elliptical shape. It may be a triangle, a quadrangle, or a polygon of pentagon or more.
  • the shape of the third portion 30 is not limited to that described above.
  • the shape of the other portions is not particularly limited.
  • the curved surfaces D3 and D4 may also be flat, and the outer shape of the third portion 30 may be a quadrangle when viewed along the extending direction of the central axis C1.
  • the outer shape of the third portion 30 may have a regular hexagonal shape or a regular octagonal shape when viewed along the extending direction of the central axis C1.
  • the first portion 10 fixed to the peripheral edge sealing portion 130, the second portion 20 holding the valve mechanism, and the third portion 30 including the pair of planes D1 and D2 extend in the direction in which the passage L1 extends. It was formed as an independent and separate site.
  • the present invention is not limited to this embodiment, and for example, as shown in FIG. 13A, the second portion 20 may be omitted and the valve mechanism may be moved to the first portion 10.
  • a pair of planes D1 and D2 may be formed on the outer surface of the second portion 20 holding the valve mechanism, and the third portion 30 may be omitted.
  • ⁇ 4-8> An adhesive member is interposed between the first portion 10 of the valve structure 200 and the peripheral seal portion 130 of the container 100 in order to facilitate the fixing of the valve structure 200 to the container 100 and improve the fixing strength thereof. You may. This aspect has been briefly mentioned in the description of the above embodiment, but will be described in more detail below.
  • the adhesive member is a member having adhesiveness to both the first portion 10 of the valve structure 200 and the packaging materials 110 and 120 constituting the peripheral seal portion 130, and is shown in FIGS. 14 and 15, for example. It can be configured as such an adhesive film 600.
  • FIG. 14 is an enlarged plan view of the periphery of the first portion 10 of the valve structure 200
  • FIG. 15 is a sectional view taken along line XV-XV thereof.
  • the first portion 10 is sandwiched between the packaging materials 110 and 120 via the adhesive film 600.
  • the portion of the adhesive film 600 sandwiched between the packaging materials 110 and 120 cannot be visually recognized, but in the same figure, the position of the portion is indicated by a dotted line for reference. .. Further, in the figure, the state inside the internal space S1 is also partially shown by a dotted line.
  • the adhesive film 600 is adhered together with the first portion 10 in a manner such as heat sealing while being sandwiched between the packaging materials 110 and 120 constituting the peripheral seal portion 130 at the time of molding the container 100.
  • the outer surface of the first portion 10 and the innermost layer of the adhesive film 600 are fused and joined, and the innermost layers of the packaging materials 110 and 120 and the outermost layer of the adhesive film 600 are fused and joined. Will be done.
  • the innermost layer of the adhesive film 600 is preferably composed of a material that easily adheres to the first portion 10.
  • the outermost layer of the adhesive film 600 is preferably composed of a material that easily adheres to the innermost layers of the packaging materials 110 and 120.
  • the adhesive film 600 may be a single-layer film of maleic anhydride-modified polypropylene (PPa).
  • PPa maleic anhydride-modified polypropylene
  • the adhesive film 600 is preferably a laminated film having a three-layer structure or a three-layer or more structure having a core material between the innermost layer and the outermost layer.
  • the adhesive film 600 may be, for example, a laminated film of PPa, polyethylene naphthalate (PEN) as a core material, and PPa, or a laminated film of PPa, polypropylene (PP) as a core material, and PPa. It may be.
  • particularly preferable core materials include fibers such as polyamide fibers, polyester fibers, and carbon fibers, and among these, polyamide fibers can be particularly preferably used.
  • the adhesive resin is easily held between the fibers, the heat resistance (heat shrinkage, etc.) of the adhesive film itself can be further enhanced, and the deformation of the adhesive film in various steps can be effectively prevented. Because it can be done.
  • a resin that can be adhered to a metal such as an ionomer resin, modified polyethylene, and EVA can also be applied.
  • Power storage device 100 Container 110 Packaging material 120 Packaging material 130 Peripheral seal 101 Containment body 200 Valve structure 201 Casing 10 First part 20 Second part 30 Third part 400 Power storage device element 41 First wing-shaped part 42 Second wing-shaped part 600 Adhesive film L1 Passage A1 1st air passage A2 2nd air passage A3 3rd air passage D1 1st plane D2 2nd plane O1 Inlet O2 Outlet S1 Internal space

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  • 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)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Packages (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
PCT/JP2020/018048 2019-04-26 2020-04-27 蓄電デバイス用弁構造体 Ceased WO2020218623A1 (ja)

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CN202080031517.0A CN113785438B (zh) 2019-04-26 2020-04-27 蓄电器件用阀结构体
KR1020257011396A KR20250057052A (ko) 2019-04-26 2020-04-27 축전 디바이스용 밸브 구조체
US17/604,004 US12381285B2 (en) 2019-04-26 2020-04-27 Power storage device valve structural body
KR1020217032932A KR102892123B1 (ko) 2019-04-26 2020-04-27 축전 디바이스용 밸브 구조체
JP2021516337A JP7533449B2 (ja) 2019-04-26 2020-04-27 蓄電デバイス用弁構造体
KR1020257011395A KR20250053983A (ko) 2019-04-26 2020-04-27 축전 디바이스용 밸브 구조체
EP20795642.6A EP3961746A4 (en) 2019-04-26 2020-04-27 VALVE STRUCTURE OF AN ACCUMULATION DEVICE

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