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
  • H01G11/78—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
  • H01G2/10—Housing; Encapsulation
• • 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
• • 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
  • H01M50/105—Pouches or flexible bags
• • 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
  • H01M50/147—Lids or covers
  • H01M50/148—Lids or covers characterised by their shape
• • 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
  • H01M50/147—Lids or covers
  • H01M50/155—Lids or covers characterised by the material
  • H01M50/157—Inorganic material
  • H01M50/159—Metals
• • 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
  • H01M50/147—Lids or covers
  • H01M50/155—Lids or covers characterised by the material
  • H01M50/16—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
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/147—Lids or covers
  • H01M50/155—Lids or covers characterised by the material
  • H01M50/164—Lids or covers characterised by the material having a layered 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
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/543—Terminals
  • H01M50/545—Terminals formed by the casing of the cells
• • 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
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/543—Terminals
  • H01M50/552—Terminals characterised by their shape
  • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
• • 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 lid body and an electricity storage device.
• Patent Document 1 discloses an example of an electricity storage device.
• This electricity storage device includes an electrode body, a current collector, an electrode terminal, and an exterior body that seals the electrode body and the current collector.
• the exterior body includes an exterior film that encases the electrode body, and a lid body that is joined to the exterior film.
• the lid body is made of, for example, a metal material, and has a through hole formed therein through which the electrode terminal is inserted.
• One end of the current collector is connected to the electrode body, and the other end is connected to the electrode terminal.
• the ends of the current collector are appropriately restrained.
• the ends of the current collector are appropriately restrained.
• the present invention aims to provide an electricity storage device that can suitably restrain the end of a current collector, and a lid body for use with this electricity storage device.
• the lid body according to the first aspect of the present invention is a lid body used for the exterior of an electricity storage device, and includes a lid main body that is composed of a metal material, and the lid main body has a housing portion that houses an end of a collector of the electricity storage device.
• the lid body according to the second aspect of the present invention is the lid body according to the first aspect, in which the storage portion is a recess that does not penetrate the lid body.
• the lid body according to the third aspect of the present invention is the lid body according to the first or second aspect, and further includes a covering body that is made of a resin material and covers a portion of the lid body.
• the lid body according to the fourth aspect of the present invention is the lid body according to the third aspect, in which the lid body has a covering portion that is covered by the covering body, and the covering portion has at least one of a through hole, a recessed portion recessed on the side opposite the covering body, or a protruding portion protruding toward the covering body.
• the lid body according to the fifth aspect of the present invention is the lid body according to the third aspect, in which the lid body has a covering portion that is covered by the covering body, and at least a portion of the covering portion has a rough surface.
• the electricity storage device comprises an electrode body and an exterior body that seals the electrode body, the exterior body including an exterior film that encases the electrode body and a lid body that is joined to the exterior film, and includes a lid body that includes a metal material, and the lid body has a housing portion that houses an end of a current collector of the electricity storage device.
• the lid and electricity storage device of the present invention allow the ends of the current collector to be appropriately restrained.
• FIG. 1 is a perspective view of an electricity storage device according to an embodiment.
• 1B is a diagram showing a method for measuring the seal strength of a second sealing portion of the electricity storage device in FIG. 1A.
• 1B is a cross-sectional view showing a layer structure of an exterior film provided in the electricity storage device of FIG. 1A.
• FIG. 1B is a diagram showing a state in which an exterior film provided on the power storage device in FIG. 1A is unfolded.
• 1B is a cross-sectional view taken along line D4-D4 in FIG. 1A.
• FIG. 5 is a side view of the lid body in a state where the exterior film in FIG. 4 is omitted.
• FIG. 5 is a plan view of the lid body in a state where the exterior film in FIG.
• FIG. 4 is omitted.
• FIG. 5 is a front perspective view of a lid main body of the lid body of FIG. 4 .
• FIG. 8 is a perspective view of the rear side of the lid body of FIG. 7 .
• 1B is a cross-sectional view taken along line D9-D9 in FIG. 1A.
• 1B is a flowchart showing an example of a manufacturing process for the electricity storage device of FIG. 1A.
• FIG. 11 is a perspective view of the rear side of a lid body of a second modified example.
• FIG. 12 is an enlarged view of a portion X in FIG.
• FIG. 13 is a perspective view of the rear side of the lid body of the third modified example.
• FIG. 13 is a cross-sectional view of an electricity accumulation device including a lid body according to a fourth modified example.
• FIG. 13 is a cross-sectional view of an electricity accumulation device including a lid body according to a fifth modified example.
• FIG. 13 is a cross-sectional view of an electricity accumulation device according to a seventh modified example.
• FIG. 1A is a perspective view that shows a schematic diagram of an electric storage device 10 of an embodiment.
• FIG. 1B is a diagram that shows a method for measuring the seal strength of the second sealing portion 92 of the electric storage device 10 of FIG. 1.
• FIG. 2 is a cross-sectional view that shows a layer structure of an exterior film 50 that is provided in the electric storage device 10 of FIG. 1A.
• FIG. 3 is a diagram that shows the exterior film 50 that is provided in the electric storage device 10 of FIG. 1A in an unfolded state.
• FIG. 4 is a cross-sectional view along the line D4-D4 in FIG. 1A.
• FIG. 5 is a side view of a lid body 60 that is provided in the electric storage device 10 of FIG. 1A.
• FIG. 6 is a plan view of the lid body 60 of FIG. 5.
• FIG. 7 is a perspective view of the front side of a lid main body 70 that is provided in the lid body 60 of FIG. 4.
• FIG. 8 is a perspective view of the back side of the lid main body 70 of FIG. 7.
• FIG. 9 is a cross-sectional view along the line D9-D9 in FIG. 1A. 1A, the direction of the arrow UD indicates the thickness direction of the power storage device 10, the direction of the arrow LR indicates the width direction of the power storage device 10, and the direction of the arrow FB indicates the depth direction of the power storage device 10.
• the directions indicated by the arrows UDLRFB are the same in the subsequent figures.
• the power storage device 10 includes an electrode body 20 including a current collector 30, and an exterior body 40.
• the electrode body 20 includes electrodes (positive and negative electrodes) constituting a power storage member such as a lithium ion battery, a capacitor, an all-solid-state battery, a semi-solid battery, a quasi-solid battery, a polymer battery, an all-resin battery, a lead-acid battery, a nickel-metal hydride battery, a nickel-cadmium battery, a nickel-iron battery, a nickel-zinc battery, a silver oxide-zinc battery, a metal-air battery, a polyvalent cation battery, or a capacitor, as well as a separator.
• a power storage member such as a lithium ion battery, a capacitor, an all-solid-state battery, a semi-solid battery, a quasi-solid battery, a polymer battery, an all-resin battery, a lead-acid battery, a nickel-metal hydride battery, a
• the shape of the electrode body 20 is an approximately rectangular parallelepiped.
• approximately rectangular parallelepiped includes not only a perfect rectangular parallelepiped, but also a solid that can be regarded as a rectangular parallelepiped by modifying the shape of a portion of the outer surface, for example.
• the shape of the electrode body 20 may be, for example, a cylinder or a polygonal prism.
• One end 31 of the current collector 30 (see Figure 9) is connected to the lid 60.
• the exterior body 40 seals the electrode body 20.
• the exterior body 40 includes an exterior film 50 and a lid body 60.
• the exterior film 50 wraps the electrode body 20 so as to have an opening 40A.
• the exterior film 50 is wrapped around the electrode body 20 so as to have an opening 40A.
• the lid body 60 is disposed on the side of the electrode body 20 so as to close the opening 40A.
• the electrode body 20 may be housed inside the exterior film 50, which is configured in a cylindrical shape so as to form the opening 40A, and the opening 40A may be closed by the lid body 60.
• the exterior body 40 seals the electrode body 20 by wrapping the exterior film 50 around the electrode body 20, so that the electrode body 20 can be easily sealed regardless of the thickness of the electrode body 20.
• the exterior film 50 is wrapped so as to contact the outer surface of the electrode body 20.
• the exterior film 50 is wrapped so as to contact the outer surface of the electrode body 20.
• the exterior film 50 is a laminate (laminate film) having, for example, a base layer 51, a barrier layer 52, and a heat-sealable resin layer 53 in this order.
• the exterior film 50 does not need to include all of these layers, and for example, the barrier layer 52 may not be included. That is, the exterior film 50 may be made of a material that is flexible and easy to bend, and may be made of, for example, a resin film.
• the exterior film 50 is preferably heat-sealable.
• the innermost and outermost layers of the exterior film 50 may be heat-sealable resin layers 53. In this case, the exterior film 50 may encase the electrode body 20 and the lid body 60 by joining the outermost and innermost layers.
• the substrate layer 51 included in the exterior film 50 is a layer for imparting heat resistance to the exterior film 50 and suppressing the occurrence of pinholes that may occur during processing or distribution.
• the substrate layer 51 is composed of, for example, at least one layer of a stretched polyester resin layer and a stretched polyamide resin layer.
• the barrier layer 52 can be protected during processing of the exterior film 50 and breakage of the exterior film 50 can be suppressed.
• the stretched polyester resin layer is preferably a biaxially stretched polyester resin layer
• the stretched polyamide resin layer is preferably a biaxially stretched polyamide resin layer.
• the stretched polyester resin layer is more preferably a biaxially stretched polyethylene terephthalate (PET) film
• the stretched polyamide resin layer is more preferably a biaxially stretched nylon (ONy) film.
• the substrate layer 51 may be composed of both a stretched polyester resin layer and a stretched polyamide resin layer. From the standpoint of film strength, the thickness of the base layer 51 is preferably, for example, 5 to 300 ⁇ m, and more preferably 5 to 150 ⁇ m.
• the barrier layer 52 is a layer that at least prevents the intrusion of moisture.
• the barrier layer 52 is bonded to the base layer 51 via, for example, an adhesive layer 54.
• Examples of the barrier layer 52 include metal foil, vapor deposition film, and resin layer having barrier properties.
• the vapor deposition film examples include metal vapor deposition film, inorganic oxide vapor deposition film, and carbon-containing inorganic oxide vapor deposition film
• the resin layer examples include fluorine-containing resins such as polyvinylidene chloride, polymers mainly composed of chlorotrifluoroethylene (CTFE), polymers mainly composed of tetrafluoroethylene (TFE), polymers having fluoroalkyl groups, and polymers mainly composed of fluoroalkyl units, and ethylene-vinyl alcohol copolymers.
• CTFE chlorotrifluoroethylene
• TFE tetrafluoroethylene
• the barrier layer 52 examples include resin films having at least one layer of these vapor deposition films and resin layers. The barrier layer 52 may be provided in multiple layers.
• the barrier layer 52 includes a layer composed of a metal material.
• metal materials constituting the barrier layer 52 include aluminum alloys, stainless steel, titanium steel, and steel plates, and when used as a metal foil, it is preferable to use at least one of aluminum alloy foil and stainless steel foil.
• the layer made of the above-mentioned metal material may contain recycled metal material.
• recycled metal material include recycled aluminum alloy, stainless steel, titanium steel, or steel plate. These recycled materials can be obtained by known methods. Recycled aluminum alloy can be obtained by the manufacturing method described in WO 2022/092231.
• the barrier layer 52 may be made of only recycled material, or may be made of a mixture of recycled and virgin materials. Note that recycled metal material refers to metal material that has been made reusable by collecting, isolating, and refining various products used in the city and waste from manufacturing processes. Also, virgin metal material refers to new metal material that has been refined from natural metal resources (raw materials) and is not recycled material.
• the aluminum alloy foil is preferably a soft aluminum alloy foil made of, for example, an annealed aluminum alloy, and from the viewpoint of further improving the formability or conformability, the aluminum alloy foil is preferably an iron-containing aluminum alloy foil.
• the iron-containing aluminum alloy foil 100 mass%, the iron content is preferably 0.1 to 9.0 mass%, and more preferably 0.5 to 2.0 mass%.
• an exterior film 50 having better formability can be obtained.
• an exterior film 50 having better flexibility can be obtained.
• silicon, magnesium, copper, manganese, etc. may be added as necessary.
• softening can be performed by annealing treatment, etc.
• the aluminum alloy foil is more preferably a hard aluminum alloy foil made of, for example, a work-hardened aluminum alloy.
• stainless steel foil examples include austenitic, ferritic, austenitic-ferritic, martensitic, and precipitation hardened stainless steel foils. From the viewpoint of providing an exterior film 50 with excellent formability, it is preferable that the stainless steel foil is made of austenitic stainless steel.
• austenitic stainless steels that make up the stainless steel foil include SUS304, SUS301, and SUS316L, with SUS304 being particularly preferred.
• the thickness of the barrier layer 52 should be such that it at least functions as a barrier layer to prevent the penetration of moisture, and may be, for example, about 9 to 200 ⁇ m.
• the thickness of the barrier layer 52 is preferably about 85 ⁇ m or less, more preferably about 50 ⁇ m or less, even more preferably about 40 ⁇ m or less, and particularly preferably about 35 ⁇ m or less.
• the thickness of the barrier layer 52 is preferably about 9.0 ⁇ m or more, more preferably about 20 ⁇ m or more, and more preferably about 25 ⁇ m or more.
• Preferred ranges of the thickness of the barrier layer 52 include about 9.0 to 85 ⁇ m, about 9.0 to 50 ⁇ m, about 9.0 to 40 ⁇ m, about 9.0 to 35 ⁇ m, about 20 to 85 ⁇ m, about 20 to 50 ⁇ m, about 20 to 40 ⁇ m, about 20 to 35 ⁇ m, about 25 to 85 ⁇ m, about 25 to 50 ⁇ m, about 25 to 40 ⁇ m, and about 25 to 35 ⁇ m.
• the barrier layer 52 is made of an aluminum alloy foil, the above-mentioned ranges are particularly preferred.
• the thickness of the barrier layer 52 is preferably about 35 ⁇ m or more, more preferably about 45 ⁇ m or more, even more preferably about 50 ⁇ m or more, and even more preferably about 55 ⁇ m or more, and is preferably about 200 ⁇ m or less, more preferably about 85 ⁇ m or less, even more preferably about 75 ⁇ m or less, and even more preferably about 70 ⁇ m or less.
• the preferable ranges are about 35 to 200 ⁇ m, about 35 to 85 ⁇ m, about 35 to 75 ⁇ m, about 35 to 70 ⁇ m, about 45 to 200 ⁇ m, about 45 to 85 ⁇ m, about 45 to 75 ⁇ m, about 45 to 70 ⁇ m, about 50 to 200 ⁇ m, about 50 to 85 ⁇ m, about 50 to 75 ⁇ m, about 50 to 70 ⁇ m, about 55 to 200 ⁇ m, about 55 to 85 ⁇ m, about 55 to 75 ⁇ m, and about 55 to 70 ⁇ m.
• the exterior film 50 has high formability, which makes deep drawing easy and can contribute to increasing the capacity of the electricity storage device.
• the thickness of the stainless steel foil is preferably about 60 ⁇ m or less, more preferably about 50 ⁇ m or less, even more preferably about 40 ⁇ m or less, even more preferably about 30 ⁇ m or less, and particularly preferably about 25 ⁇ m or less.
• the thickness of the stainless steel foil is preferably about 10 ⁇ m or more, more preferably about 15 ⁇ m or more.
• Preferred ranges for the thickness of the stainless steel foil include about 10 to 60 ⁇ m, about 10 to 50 ⁇ m, about 10 to 40 ⁇ m, about 10 to 30 ⁇ m, about 10 to 25 ⁇ m, about 15 to 60 ⁇ m, about 15 to 50 ⁇ m, about 15 to 40 ⁇ m, about 15 to 30 ⁇ m, and about 15 to 25 ⁇ m.
• the barrier layer 52 when the barrier layer 52 is an aluminum foil, it is preferable that at least the surface opposite to the base layer 51 is provided with a corrosion-resistant film in order to prevent dissolution and corrosion.
• the barrier layer 52 may be provided with a corrosion-resistant film on both sides.
• the corrosion-resistant film refers to a thin film that is provided with corrosion resistance (e.g., acid resistance, alkali resistance, etc.) on the barrier layer 52 by performing, for example, hydrothermal conversion treatment such as boehmite treatment, chemical conversion treatment, anodizing treatment, plating treatment such as nickel or chromium, or corrosion prevention treatment by applying a coating agent on the surface of the barrier layer 52.
• the corrosion-resistant film means a film that improves the acid resistance of the barrier layer 52 (acid-resistant film), a film that improves the alkali resistance of the barrier layer 52 (alkali-resistant film), etc.
• the treatment for forming the corrosion-resistant film may be one type, or two or more types may be combined. In addition, it is possible to form not only one layer but also multiple layers. Furthermore, among these treatments, hydrothermal conversion treatment and anodizing treatment are treatments in which the metal foil surface is dissolved by a treatment agent to form metal compounds with excellent corrosion resistance. Note that these treatments may also be included in the definition of chemical conversion treatment. Also, if the barrier layer 52 has a corrosion-resistant coating, the corrosion-resistant coating is also included in the barrier layer 52.
• the corrosion-resistant coating prevents delamination between the barrier layer 52 (e.g., aluminum alloy foil) and the base layer 51 during molding of the exterior film 50, prevents dissolution and corrosion of the surface of the barrier layer 52 due to hydrogen fluoride produced by the reaction between the electrolyte and moisture, and in particular prevents dissolution and corrosion of aluminum oxide present on the surface of the barrier layer 52 when the barrier layer 52 is an aluminum alloy foil, and improves the adhesion (wettability) of the surface of the barrier layer 52, preventing delamination between the base layer 51 and the barrier layer 52 during heat sealing and between the base layer 51 and the barrier layer 52 during molding.
• the barrier layer 52 e.g., aluminum alloy foil
• the heat-sealable resin layer 53 is bonded to the barrier layer 52, for example, via an adhesive layer 55.
• the heat-sealable resin layer 53 included in the exterior film 50 is a layer that provides the exterior film 50 with heat-sealing sealability.
• Examples of the heat-sealable resin layer 53 include resin films made of polyester resins such as polyethylene terephthalate resins and polybutylene terephthalate resins, polyolefin resins such as polyethylene resins and polypropylene resins, or acid-modified polyolefin resins obtained by graft-modifying these polyolefin resins with an acid such as maleic anhydride. From the standpoint of sealability and strength, the thickness of the heat-sealable resin layer 53 is preferably, for example, 20 to 300 ⁇ m, and more preferably 40 to 150 ⁇ m.
• the exterior film 50 has one or more layers with a buffer function (hereinafter referred to as "buffer layer") outside the heat-sealable resin layer 53, and more preferably outside the barrier layer 52.
• the buffer layer may be laminated on the outside of the base layer 51, or the base layer 51 may also function as a buffer layer.
• the multiple buffer layers may be adjacent to each other, or may be laminated via the base layer 51, the barrier layer 52, etc.
• the material constituting the buffer layer can be selected from any material having cushioning properties.
• the material having cushioning properties is, for example, rubber, nonwoven fabric, or foam sheet.
• the rubber is, for example, natural rubber, fluororubber, or silicone rubber.
• the rubber hardness is preferably about 20 to 90.
• the material constituting the nonwoven fabric is preferably a material having excellent heat resistance.
• the lower limit of the thickness of the buffer layer is preferably 100 ⁇ m, more preferably 200 ⁇ m, and even more preferably 1000 ⁇ m.
• the upper limit of the thickness of the buffer layer is preferably 5000 ⁇ m, and even more preferably 3000 ⁇ m.
• the preferred range of thickness of the buffer layer is 100 ⁇ m to 5000 ⁇ m, 100 ⁇ m to 3000 ⁇ m, 200 ⁇ m to 5000 ⁇ m, 200 ⁇ m to 3000 ⁇ m, 1000 ⁇ m to 5000 ⁇ m, or 1000 ⁇ m to 3000 ⁇ m.
• the most preferred range of thickness of the buffer layer is 1000 ⁇ m to 3000 ⁇ m.
• the lower limit of the thickness of the buffer layer is preferably 0.5 mm.
• the upper limit of the thickness of the buffer layer is preferably 10 mm, more preferably 5 mm, and even more preferably 2 mm.
• the preferred range of the thickness of the buffer layer is 0.5 mm to 10 mm, 0.5 mm to 5 mm, or 0.5 mm to 2 mm.
• the buffer layer functions as a cushion, preventing the exterior film 50 from being damaged by impact when the energy storage device 10 is dropped or by handling during the manufacture of the energy storage device 10.
• the lid body 60 has, for example, a rectangular parallelepiped shape overall.
• the lid body 60 has a lid body 70 containing a metal material, and a covering body 80 containing a resin material and covering a part of the lid body 70.
• the lid body 60 can be manufactured, for example, by injection molding the covering body 80 onto the lid body 70.
• the metal material constituting the lid body 70 can be selected arbitrarily.
• the metal material constituting the lid body 70 is, for example, aluminum, aluminum alloy, nickel, copper, or a copper alloy.
• the lid body 70 connected to the positive electrode is preferably made of aluminum or an aluminum alloy.
• the lid body 70 connected to the negative electrode is preferably made of nickel, copper, or a copper alloy.
• the material constituting the lid body 70 connected to the negative electrode may be copper plated with nickel.
• the material constituting the lid body 70 may include recycled metal material.
• the lid body 70 has a base 71 and a covering 72.
• the lid body 70 is made of a metal material.
• “made of a metal material” means that, when the entire material constituting the lid body 70 is taken as 100% by mass, the metal material content is 50% by mass or more, preferably 80% by mass or more, more preferably 90% by mass or more, and even more preferably 95% by mass or more.
• the material constituting the lid body 70 can contain materials other than metal materials in addition to metal materials.
• the lid body 70 When the lid body 70 is made of a metal material, it is preferable that the lid body 70 has a corrosion-resistant coating as described for the barrier layer 52.
• the lid body 60 may have at least one of an adhesive film and an adhesive layer between the lid body 70 and the cover 80 to suitably bond them together.
• the adhesive film or adhesive layer may be a single layer or a multilayer, and preferably contains at least a resin material having a polar group.
• the adhesive layer can be formed by dip coating, a dispenser, inkjet, spraying, screen printing, or the like.
• the base 71 shown in Figures 7 and 8 is, for example, a rectangular plate, and has a first surface 71A and a second surface 71B.
• the first surface 71A faces the electrode body 20.
• the second surface 71B is the surface opposite the first surface 71A.
• the base 71 is formed with a storage portion 71X that stores the end 31 of the current collector 30.
• the shape of the storage section 71X can be selected arbitrarily as long as it can accommodate at least the end 31 of the current collector 30.
• the storage section 71X is a recess that is recessed from the first surface 71A toward the second surface 71B.
• the storage section 71X does not penetrate the lid body 70.
• the opening of the storage section 71X faces the electrode body 20.
• the bottom of the storage section 71X protrudes from the second surface 71B toward the outside.
• the storage section 71X extends in the LR direction.
• the number of storage sections 71X formed in the base 71 can be selected arbitrarily. In the example shown in FIG. 8, two storage sections 71X are formed in the base 71.
• the two storage sections 71X are aligned in the UD direction.
• One or three or more storage sections 71X may be formed in the base 71.
• the end 31 of the current collector 30 is joined to an arbitrary location inside the storage section 71X by, for example, ultrasonic welding or laser welding.
• the end 31 of the current collector 30 and the housing 71X may be joined by screw fixing, press fitting, shrink fitting, crimp welding, pressure welding, brazing, or adhesive.
• the end 31 of the current collector 30 and the housing 71X may have conductivity at least in the part joined by adhesive and in the part other than the part joined by adhesive.
• the lid body 70 is configured to include a metal material, so that the lid body 70 functions as an electrode terminal. Therefore, the electricity storage device 10 has fewer components than conventional electricity storage devices.
• the lid body 70 may be joined to an electrode terminal, for example, to the bottom of the housing 71X.
• the covering portion 72 is covered by the covering body 80.
• the covering portion 72 is a frame-like portion rising from the first surface 71A of the base portion 71.
• the covering portion 72 has a first covering portion 72A, a second covering portion 72B, a third covering portion 72C, and a fourth covering portion 72D.
• the first covering portion 72A constitutes the upper surface of the lid body 70.
• the first covering portion 72A extends in a first direction (in this embodiment, the LR direction) in a front view of the lid body 70.
• the second covering portion 72B and the third covering portion 72C are connected to the first covering portion 72A and constitute the side surface of the lid body 70.
• the second covering portion 72B and the third covering portion 72C extend in a second direction (in this embodiment, the UD direction) that intersects with the first direction in a front view of the lid body 70.
• the first direction and the second direction are perpendicular to each other in a front view of the lid body 70.
• the first direction and the second direction do not have to be perpendicular to each other when viewed from the front of the lid body 70.
• the fourth covering portion 72D forms the lower surface of the lid body 70.
• the fourth covering portion 72D extends in the first direction (the LR direction in this embodiment) when viewed from the front of the lid body 70.
• At least a portion of the surface 72X of the covering portion 72 is covered by the covering body 80.
• the entire surface 72X of the covering portion 72 is covered by the covering body 80.
• the covering portion 72 is covered such that the surface 72X and the back surface 72Y are sandwiched between the covering body 80.
• the entire back surface 72Y is covered by the covering body 80.
• a through hole 72Z is formed in the covering portion 72.
• the shape of the through hole 72Z in a planar view can be selected arbitrarily. In this embodiment, the shape of the through hole 72Z in a planar view is rectangular. The shape of the through hole 72Z in a planar view may be a circle, an ellipse, a square, or a polygon.
• the number of through holes 72Z formed in the covering portion 72 can be selected arbitrarily. In the example shown in FIG. 7, five through holes 72Z are formed in each of the first covering portion 72A, the second covering portion 72B, the third covering portion 72C, and the fourth covering portion 72D. One to four, or six or more through holes 72Z may be formed in each of the first covering portion 72A, the second covering portion 72B, the third covering portion 72C, and the fourth covering portion 72D. The number of through holes 72Z formed in the first covering portion 72A, the second covering portion 72B, the third covering portion 72C, and the fourth covering portion 72D may be different from each other. The first covering portion 72A, the second covering portion 72B, the third covering portion 72C, and the fourth covering portion 72D may not have a through hole 72Z formed in some parts.
• the covering body 80 shown in FIG. 4 has a lid seal portion 81.
• the lid seal portion 81 is heat sealed to the heat-sealable resin layer 53 of the exterior film 50.
• the lid seal portion 81 includes a first seal surface 81A, a second seal surface 81B, a third seal surface 81C, and a fourth seal surface 81D.
• the first seal surface 81A constitutes the upper surface of the lid body 60.
• the first seal surface 81A extends in a first direction (in this embodiment, the LR direction) when viewed from the front of the lid body 60.
• the second seal surface 81B and the third seal surface 81C are connected to the first seal surface 81A and constitute the side surface of the lid body 60.
• the second seal surface 81B and the third seal surface 81C extend in a second direction (in this embodiment, the UD direction) that intersects with the first direction when viewed from the front of the lid body 60.
• the first direction and the second direction are perpendicular to each other when viewed from the front of the lid 60.
• the first direction and the second direction do not have to be perpendicular to each other when viewed from the front of the lid 60.
• the fourth seal surface 81D forms the lower surface of the lid 60.
• the fourth seal surface 81D extends in the first direction (the LR direction in this embodiment) when viewed from the front of the lid 60.
• the lid body 60 When the lid body 60 is plate-shaped, it is preferable that the lid body 60 has a certain degree of thickness so that deformation of the exterior body 40 is suppressed even when the power storage device 10 is arranged on top of each other. From another perspective, when the lid body 60 is plate-shaped, it is preferable that the lid seal portion 81 of the lid body 60 has a certain degree of thickness so that the lid seal portion 81 of the lid body 60 and the exterior film 50 can be suitably heat-sealed when forming the second sealing portion 92 described below.
• the minimum value of the thickness of the lid seal portion 81 of the lid body 60 is, for example, 1.0 mm, more preferably 3.0 mm, and even more preferably 4.0 mm.
• the maximum value of the thickness of the lid seal portion 81 of the lid body 60 is, for example, 20 mm, more preferably 15 mm, and even more preferably 10 mm.
• the maximum value of the thickness of the lid seal portion 81 of the lid body 60 may be 20 mm or more.
• the preferred ranges for the thickness of the lid seal portion 81 of the lid body 60 are 1.0 mm to 20 mm, 1.0 mm to 15 mm, 1.0 mm to 10 mm, 3.0 mm to 20 mm, 3.0 mm to 15 mm, 3.0 mm to 10 mm, 4.0 mm to 20 mm, 4.0 mm to 15 mm, and 4.0 mm to 10 mm.
• the lid body 60 when the lid body 60 is expressed as a plate-like body, this does not include a case in which the lid body 60 is composed only of a film specified by the [Packaging Terminology] standard of the JIS (Japanese Industrial Standards).
• the thickness of the lid seal portion 81 of the lid body 60 may vary depending on the part of the lid body 60. When the thickness of the lid seal portion 81 of the lid body 60 varies depending on the part, the thickness of the lid seal portion 81 of the lid body 60 is the thickness of the thickest part.
• the lid seal portion 81 further includes boundaries 82, 83, 84, and 85.
• Boundary 82 is the boundary between the first seal surface 81A and the second seal surface 81B.
• Boundary 83 is the boundary between the first seal surface 81A and the third seal surface 81C.
• Boundary 84 is the boundary between the fourth seal surface 81D and the second seal surface 81B.
• Boundary 85 is the boundary between the fourth seal surface 81D and the third seal surface 81C.
• the shapes of the boundaries 82 to 85 may be angular, or may be rounded by applying R processing. In this embodiment, boundaries 82 to 85 are angular.
• the coating 80 is made of a resin material.
• "made of a resin material” means that, when the entire material constituting the coating 80 is taken as 100% by mass, the resin material content is 50% by mass or more, preferably 80% by mass or more, more preferably 90% by mass or more, and even more preferably 95% by mass or more.
• the material constituting the coating 80 can contain materials other than the resin material in addition to the resin material.
• resins include thermoplastic resins such as polyester, polyolefin, polyamide, epoxy resin, acrylic resin, fluororesin, polyurethane, silicone resin, and phenol resin, as well as modified versions of these resins.
• the resin material may be a mixture of these resins, a copolymer, or a modified version of a copolymer.
• the resin material is preferably a heat-sealable resin such as polyester or polyolefin, and more preferably polyolefin.
• the covering 80 may be formed by any molding method.
• the resin material contained in the material constituting the coating 80 is preferably an olefin-based random copolymer, more preferably contains a resin containing a polyolefin skeleton as a main component, even more preferably contains polyolefin as a main component, and even more preferably contains polypropylene as a main component.
• the polyolefin may be an acid-modified polyolefin.
• the resin material contained in the material constituting the coating 80 preferably contains multiple types of amide-based lubricants. Furthermore, the resin material contained in the material constituting the coating 80 preferably contains multiple types of amide-based lubricants that further contain unsaturated fatty acid amides in addition to saturated fatty acid amides.
• the resin material contained in the material constituting the coating 80 may be a polyolefin resin to which a propylene-based elastomer having a melting point higher than 150°C has been added.
• polyesters include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, polyethylene isophthalate, and copolymer polyesters.
• copolymer polyesters include copolymer polyesters in which ethylene terephthalate is the main repeating unit.
• polyethylene terephthalate is the main repeating unit and is polymerized with ethylene isophthalate
• polyethylene (terephthalate/isophthalate) polyethylene (terephthalate/adipate)
• polyethylene (terephthalate/sodium sulfoisophthalate) polyethylene (terephthalate/sodium isophthalate)
• polyethylene (terephthalate/phenyl-dicarboxylate) polyethylene (terephthalate/decanedicarboxylate).
• polybutylene terephthalate is the preferred resin material from the viewpoint of increasing heat resistance and pressure resistance.
• polyolefins include polyethylenes such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, and linear low-density polyethylene; ethylene- ⁇ -olefin copolymers; polypropylenes such as homopolypropylene, block copolymers of polypropylene (e.g., block copolymers of propylene and ethylene), and random copolymers of polypropylene (e.g., random copolymers of propylene and ethylene); propylene- ⁇ -olefin copolymers; and ethylene-butene-propylene terpolymers.
• polyolefin resin is a copolymer, it may be a block copolymer or a random copolymer. Of these, polypropylene is preferred as the resin material because of its excellent heat fusion properties and electrolyte resistance.
• the resin as the resin material may contain a filler as necessary.
• fillers include glass beads, graphite, glass fiber, and carbon fiber.
• the melt mass flow rate of the resin material contained in the material constituting the coating 80 is preferably in the range of 1 g/10 min to 100 g/10 min, and more preferably in the range of 5 g/10 min to 80 g/10 min.
• the melt mass flow rate is measured based on JIS K7210-1:2014.
• the exterior film 50 is wrapped around the electrode body 20 so as to have an opening 40A, and the opposing surfaces of the exterior film 50 (thermally adhesive resin layer 53) are heat sealed together to form the first sealing portion 91.
• the first sealed portion 91 is formed by heat sealing a portion including the first edge 50A and a portion including the second edge 50B of the exterior film 50 shown in FIG. 3.
• the first sealed portion 91 extends in the longitudinal direction (FB direction) of the exterior body 40.
• the position at which the first sealed portion 91 is formed in the exterior body 40 can be selected arbitrarily.
• the root 91X of the first sealed portion 91 is preferably located on the edge 43 at the boundary between the first surface 41 and the second surface 42 of the exterior body 40.
• the first surface 41 has a larger area than the second surface 42.
• the root 91X of the first sealed portion 91 may be located on any surface of the exterior body 40.
• the first sealed portion 91 protrudes outward from the electrode body 20 in a plan view.
• the first sealed portion 91 may be folded, for example, toward the second surface 42 of the exterior body 40, or toward the first surface 41.
• the second sealing portion 92 is formed by heat-sealing the heat-sealable resin layer 53 of the exterior film 50 and the lid seal portion 81 of the lid body 60.
• the seal strength between the heat-sealable resin layer 53 of the exterior film 50 and the lid seal portion 81 of the lid body 60 may be referred to as the seal strength of the second sealing portion 92.
• the seal strength of the second sealing portion 92 is the seal strength between the heat-sealable resin layer 53 and the lid body 60 at the long side portion of the lid seal portion 81, i.e., the lid seal portion 81 extending in the LR (width) direction in FIG. 1A.
• the seal strength of the second sealing portion 92 is measured as follows. First, a cut is made in the portion of the exterior film 50 that constitutes the first surface 41 of the exterior body 40, and three strip-shaped members 41X, 41Y, and 41Z (see the two-dot chain line in FIG. 1B) are formed aligned in the LR direction. The width of the three strip-shaped members 41X, 41Y, and 41Z in the LR direction is 15 mm. The ends of the strip-shaped members 41X, 41Y, and 41Z are joined to the lid body 60 at the second sealing portion 92. The length of the lid body 60 in the LR direction is 45 mm or more.
• the seal strength of each of the strip-shaped members 41X, 41Y, and 41Z is measured by pulling the end opposite the end joined to the lid body 60 upward in the UD direction (the direction opposite to the first surface 41B).
• the distance between the chucks in the UD direction is 10 mm.
• the seal strength of the strip members 41X, 41Y, and 41Z is the peak value of the seal strength.
• the seal strength of the second sealing portion 92 is the average value of the seal strength of the strip members 41X, 41Y, and 41Z.
• the seal strength of the three strip members is measured in the same manner as when the length of the lid body 60 in the LR direction is 45 mm or more.
• the obtained seal strengths are divided by the arbitrary width X mm and multiplied by 15 to convert them into the seal strengths of the three strip members in a width of 15 mm.
• the seal strength of the second sealing portion 92 is the average value of the seal strengths of the three strip members converted into a width of 15 mm.
• the seal strength of the second sealing portion 92 is the seal strength of the long side portion of the lid seal portion 81 of the multiple parts.
• the seal strength of the second sealing portion 92 is preferably 40 N/15 mm or more, more preferably 50 N/15 mm or more, more preferably 60 N/15 mm or more, more preferably 70 N/15 mm or more, and even more preferably 85 N/15 mm or more.
• the seal strength of the second sealing portion 92 is 40 N/15 mm or more, the state where the electrode body 20 is sealed by the exterior body 40 is maintained suitably even if the energy storage device 10 is used for, for example, several years (less than 10 years).
• the seal strength of the second sealing portion 92 is 85 N/15 mm or more, the state where the electrode body 20 is sealed by the exterior body 40 is maintained suitably even if the energy storage device 10 is used for, for example, 10 years or more.
• the seal strength of the second sealing portion 92 is preferably 300 N/15 mm or less.
• the preferred range of the seal strength of the second sealing portion 92 is 40N/15mm to 300N/15mm, 50N/15mm to 300N/15mm, 60N/15mm to 300N/15mm, 70N/15mm to 300N/15mm, or 85N/15mm to 300N/15mm.
• the lid body 60 preferably has a protrusion 86 protruding from the lid seal portion 81 so that a gap is unlikely to form between the exterior film 50 and the lid body 60.
• the protrusion 86 may be formed integrally with the covering body 80, or may be formed separately from the covering body 80 and joined to the covering body 80. In this embodiment, the protrusion 86 is formed integrally with the covering body 80.
• the position at which the protrusion 86 is formed in the lid seal portion 81 can be selected arbitrarily. A gap between the exterior film 50 and the lid body 60 is likely to form, for example, between the root 91X of the first sealing portion 91 and the lid body 60.
• the protrusion 86 is formed at the location where the root 91X of the first sealing portion 91 is located in the lid seal portion 81.
• the root 91X of the first sealing portion 91 is located at the boundary 82 of the lid body 60.
• the protrusion 86 is formed at the boundary 82 in the lid seal portion 81.
• the first sealing portion 91 is sealed with the protrusion 86 sandwiched between them.
• the protrusion 86 may be formed on at least one of the first seal surface 81A, the second seal surface 81B, the third seal surface 81C, the fourth seal surface 81D, the boundary 83, the boundary 84, and the boundary 85.
• the shape of the protrusion 86 can be selected arbitrarily. In this embodiment, the shape of the protrusion 86 is plate-like. The thickness of the protrusion 86 can be selected arbitrarily. In this embodiment, the thickness of the protrusion 86 decreases with increasing distance from the boundary 82. In other words, the protrusion 86 tapers with increasing distance from the boundary 82. The thickness of the protrusion 86 may be constant, or may increase with increasing distance from the boundary 82.
• the direction in which the protrusion 86 extends can be selected arbitrarily.
• the protrusion 86 extends along a first direction (in this embodiment, the LR direction).
• the protrusion 86 may extend along a second direction (in this embodiment, the UD direction).
• the protrusion 86 may extend in a third direction that intersects with the first direction (in this embodiment, the LR direction) and the second direction (in this embodiment, the UD direction) when viewed from the front of the lid 60.
• the length of the protrusion 86 can be selected as desired within a range equal to or less than the length of the first sealing portion 91.
• the length of the protrusion 86 may be substantially equal to the length of the first sealing portion 91, or may be 30% to 50% of the length of the first sealing portion 91.
• Manufacturing method of electricity storage device> 10 is a flowchart showing an example of a method for manufacturing the power storage device 10.
• the method for manufacturing the power storage device 10 includes, for example, a first step, a second step, a third step, and a fourth step.
• the first step to the fourth step are performed, for example, by a manufacturing device for the power storage device 10. At least a part of the first step to the fourth step may be performed by an operator. Note that the first step to the fourth step are merely names of the steps in the method for manufacturing the power storage device 10 defined for convenience, and do not necessarily refer to the order of the steps.
• the manufacturing equipment places the lid body 60 on both ends of the electrode body 20 and connects the end 31 of the current collector 30 to the lid body 70 of the lid body 60.
• the lid body 60 which functions as an electrode terminal, and the electrode of the electrode body 20 are electrically connected.
• the second step of step S12 is performed after the first step.
• the manufacturing device winds the exterior film 50 around the electrode body 20 and the lid body 60 while tension is applied to the exterior film 50, while restricting the movement of the electrode body 20 and the lid body 60 by the restricting means.
• the restricting means is, for example, a groove into which the electrode body 20 and the lid body 60 are fitted.
• the restricting means may be a device that applies an external force to the electrode body 20 and the lid body 60 so that the electrode body 20 and the lid body 60 do not move.
• the restricting means may be a device that applies a force to the electrode body 20 and the lid body 60 in the direction opposite to the direction in which the exterior film 50 is pulled.
• the restricting means may include a roller that runs on the exterior film 50 while the exterior film 50 is being pulled in order to remove wrinkles in the exterior film 50.
• the third step of step S13 is carried out after the second step.
• the manufacturing device forms the second sealed portion 92 by heat sealing the exterior film 50 and the lid body 60.
• the fourth step of step S14 is carried out before or after the third step.
• the manufacturing device forms a first sealing portion 91 by heat-sealing the heat-sealable resin layer 53 in a portion including the first edge 50A of the exterior film 50 and the heat-sealable resin layer 53 in a portion including the second edge 50B while applying tension to the exterior film 50 while restricting the movement of the electrode body 20 and the lid body 60, so that the protruding portion 86 of the lid body 60 is sandwiched by the exterior film 50.
• the housing portion 71X is formed in the lid body 70, so that the end portion 31 of the current collector 30 can be appropriately restrained.
• the above-mentioned embodiment is an example of a form that the lid body and the electricity storage device according to the present invention can take, and is not intended to limit the form.
• the lid body and the electricity storage device according to the present invention can take a form different from the form exemplified in the embodiment.
• One example is a form in which a part of the configuration of the embodiment is replaced, changed, or omitted, or a form in which a new configuration is added to the embodiment.
• Some examples of modified embodiments are shown below. Note that the following modified embodiments can be combined with each other as long as there is no technical contradiction.
• the lid 60 does not have to have the protrusion 86.
• the first modified example can also be similarly applied to the following second to eleventh modified examples.
• Fig. 11 is a perspective view of the rear side of a lid body 270 of a second modified example.
• Fig. 12 is an enlarged view of a portion X in Fig. 11 .
• the through hole 72Z may be omitted from the covering portion 72.
• At least a portion of the covering portion 72 may have a rough surface 73.
• the rough surface 73 can be formed, for example, by roughening the surface 72X of the covering portion 72.
• Specific methods of roughening include, for example, shot blasting, polishing, anodizing, wet etching, plasma treatment, laser treatment, sandblasting, or roughening plating.
• the entire surface 72X of the covering portion 72 is a rough surface 73.
• minute irregularities are formed on the rough surface 73.
• the distance between the peaks of adjacent minute irregularities may be about 0.01 to 300 ⁇ m.
• the maximum height roughness Rz of the rough surface 73 is preferably in the range of 0.01 ⁇ m to 500 ⁇ m, and more preferably in the range of 0.5 ⁇ m to 200 ⁇ m.
• the maximum height roughness Rz of the rough surface 73 is measured based on JIS B 0601-2001.
• the maximum height roughness Rz of the rough surface 73 is measured using a laser microscope equipped with a white light interferometer VK-X3000 manufactured by Keyence Corporation.
• the lid body 270 may include at least one of an adhesive film and an adhesive layer.
• the adhesive film or adhesive layer may be a single layer or a multilayer, and preferably contains at least a resin material having a polar group.
• the adhesive layer can be formed by dip coating, a dispenser, inkjet, spraying, screen printing, or the like.
• the coating 80 may be joined to the lid body 270 by insert molding, press molding, induction heating compression bonding, laser heating, or friction stirring.
• at least one of the coating 80 and the rough surface 73 of the coating portion 72 may be anodized or plated, or a resin reactive coating may be formed. It is preferable that the rough surface 73 has the corrosion-resistant coating described for the barrier layer 52.
• Third modified example> 13 is a perspective view of the front side of the lid body 370 of the third modified example.
• the lid body 370 may have a rectangular container 370X disposed in a space surrounded by the covering portion 72.
• the container 370X may be formed integrally with the base 71, or may be formed separately from the base 71 and joined to the base 71.
• the side surface of the container 370X faces the back surface 72Y of the covering portion 72 with a small gap therebetween.
• the covering body 80 may be disposed in the gap between the side surface of the container 370X and the back surface 72Y of the covering portion 72.
• the container 370X may have a container portion 371X formed therein. When the container 370X has the container portion 371X formed therein, the lid body 60 is disposed so that the opening of the container portion 371X of the lid body 370 faces the electrode body 20.
• Fourth Modified Example> 14 is a cross-sectional view of the electric storage device 10 including the lid body 470 of the fourth modified example.
• the covering portion 72 of the lid body 470 may have a recess 472Z that does not penetrate the covering portion 72 instead of or in addition to the through hole 72Z.
• the recess 472Z may be recessed from the front surface 72X toward the back surface 72Y, or may be recessed from the back surface 72Y toward the front surface 72X.
• the number of recesses 472Z formed in the covering portion 72 and the specifications regarding the positions at which the recesses 472Z are formed in the covering portion 72 are the same as the specifications regarding the through hole 72Z.
• a rough surface 73 may be formed on at least a part of the front surface 72X of the covering portion 72.
• Fifth Modified Example> 15 is a cross-sectional view of the electric storage device 10 including the lid body 570 of the fifth modified example.
• the covering portion 72 of the lid body 570 may have a convex portion 572Z protruding from the covering portion 72 toward the covering body 80 instead of or in addition to the through hole 72Z.
• the convex portion 572Z may protrude from the front surface 72X toward the covering body 80, or may protrude from the back surface 72Y toward the covering body 80.
• the number of the convex portions 572Z formed in the covering portion 72 and the specifications regarding the positions at which the convex portions 572Z are formed in the covering portion 72 are the same as the specifications regarding the through hole 72Z.
• a rough surface 73 may be formed on at least a part of the front surface 72X of the covering portion 72.
• the cover 80 may be omitted from the lid body 60.
• the surface 72X of the lid body 70 and the heat-sealable resin layer 53 of the exterior film 50 are joined.
• the surface 72X of the lid body 70 and the heat-sealable resin layer 53 of the exterior film 50 are preferably joined via an adhesive film that is suitably bonded to metal materials and resin materials.
• the sixth modified example can also be applied to the other modified examples.
• FIG. 16 is a cross-sectional view of the electricity storage device 10 of the seventh modified example.
• the electricity storage device 10 of the seventh modified example includes a storage section 700.
• the storage section 700 is, for example, a known clip.
• the storage section 700 may be a slide clip.
• the storage section 700 includes a base 710 and a clamping section 720.
• the base 710 is joined to the first surface 71A of the lid body 70.
• the clamping section 720 is connected to the base 710 and is configured to be able to clamp a portion including the end 31 of the current collector 30.
• the current collector 30 and the lid body 70 can be connected by clamping a portion including the end 31 of the current collector 30 with the clamping section 720, so that the electricity storage device 10 can be easily manufactured. Furthermore, when the accommodation portion 700 is a slide clip, in the FB direction, the current collector 30 can be inserted into the clamping portion 720 in a direction approaching the base portion 710, while movement in a direction away from the base portion 710 is restricted by the clamping portion 720. Therefore, the state in which the current collector 30 is clamped by the clamping portion 720 is suitably maintained.
• the specific method of forming the protrusion 86 of the lid body 60 can be changed as desired.
• the protrusion 86 may be formed by an adhesive film or the like that is bonded to the lid seal portion 81 of the lid main body 70.
• the protrusion 86 may be formed by bonding a plurality of adhesive films to the lid seal portion 81 in an overlapping manner, or the protrusion 86 may be formed by bonding an adhesive film to the lid seal portion 81 in a flap shape.
• the exterior film 50 of the power storage device 10 may protrude outward beyond at least one of the two lid bodies 60 in the FB direction.
• the electrode body 20 is sealed by closing the portion of the exterior film 50 that protrudes outward beyond the lid body 60.
• the portion of the exterior film 50 that protrudes beyond the lid body 60 may be folded like a Gabeltop pouch or a brick pouch.
• the exterior body 40 may not have one of the two lid bodies 60.
• the electrode body 20 in a portion of the exterior body 40 where the lid body 60 is omitted, the electrode body 20 is sealed by closing a portion of the exterior film 50 that protrudes outward beyond the electrode body 20.
• the portion of the exterior film 50 that protrudes outward beyond the electrode body 20 may be folded like a Gabeltop pouch or a brick pouch.
• the outer shape of the exterior body 40 can be changed as desired.
• the outer shape of the exterior body 40 may be a cylinder, a prism, or a cube.
• Electrode body 30 Current collector 32: End portion 40: Exterior body 50: Exterior film 60: Lid body 70, 270, 370, 470, 570: Lid body 71X: Storage portion 72: Covering portion 72X: Surface 73: Rough surface 80: Covering body

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Inorganic Chemistry (AREA)
• Sealing Battery Cases Or Jackets (AREA)
• Electric Double-Layer Capacitors Or The Like (AREA)
• Connection Of Batteries Or Terminals (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=93589884

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (7)

Family Cites Families (9)

• 2024
  • 2024-05-17 WO PCT/JP2024/018414 patent/WO2024242067A1/ja not_active Ceased
  • 2024-05-17 JP JP2024565363A patent/JP7643652B1/ja active Active
• 2025
  • 2025-01-09 JP JP2025003754A patent/JP7736215B2/ja active Active
  • 2025-08-27 JP JP2025141230A patent/JP2025169434A/ja active Pending

Patent Citations (7)

Also Published As

Similar Documents

Legal Events