WO2024009787A1 - Electricity storage device, electric vehicle, packaging container for electricity storage device, and method for manufacturing same - Google Patents
Electricity storage device, electric vehicle, packaging container for electricity storage device, and method for manufacturing same Download PDFInfo
- Publication number
- WO2024009787A1 WO2024009787A1 PCT/JP2023/023127 JP2023023127W WO2024009787A1 WO 2024009787 A1 WO2024009787 A1 WO 2024009787A1 JP 2023023127 W JP2023023127 W JP 2023023127W WO 2024009787 A1 WO2024009787 A1 WO 2024009787A1
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- WIPO (PCT)
- Prior art keywords
- storage device
- resin layer
- laminated film
- power storage
- electricity storage
- Prior art date
Links
- 238000003860 storage Methods 0.000 title claims abstract description 119
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 47
- 230000005611 electricity Effects 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 238000000034 method Methods 0.000 title claims description 8
- 239000004840 adhesive resin Substances 0.000 claims abstract description 28
- 229920006223 adhesive resin Polymers 0.000 claims abstract description 28
- 230000004888 barrier function Effects 0.000 claims abstract description 28
- 239000011888 foil Substances 0.000 claims abstract description 9
- 238000010030 laminating Methods 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims description 44
- 239000011347 resin Substances 0.000 claims description 44
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 239000003792 electrolyte Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 238000004146 energy storage Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 77
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
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- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 2
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- 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
- 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
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
- H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only 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
- H01M50/148—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
-
- 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag 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
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
-
- 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
-
- 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
- H01M50/557—Plate-shaped terminals
-
- 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
-
- 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/591—Covers
-
- 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 an electricity storage device sealed by a packaging container and an electric vehicle equipped with the same.
- the present invention also relates to a packaging container for an electricity storage device and a method for manufacturing the same.
- This electric vehicle includes an electric vehicle (EV), a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHEV), and the like. Electric vehicles use only a motor as a power source, and hybrid vehicles and plug-in hybrid vehicles use a motor and an engine as power sources.
- EV electric vehicle
- HEV hybrid vehicle
- PHEV plug-in hybrid vehicle
- Patent Document 1 A conventional power storage device mounted on an electric vehicle is disclosed in Patent Document 1.
- a plurality of these power storage devices are connected in series and in parallel, and are installed under the floor of an electric vehicle.
- the power storage device includes a plurality of cells made of secondary batteries and is configured in a bipolar type.
- a plurality of unit cells are stacked, and a positive electrode and a negative electrode are respectively connected to both end faces in the stacking direction.
- the electricity storage device is covered with a packaging container and sealed with the positive electrode and negative electrode pulled out.
- the packaging container is formed by two laminate films with a thermoadhesive resin layer.
- One of the laminate films has a recessed storage section for storing the stacked unit cells, and a flange section is provided around the storage section.
- the heat-adhesive resin layer of one laminate film and the heat-adhesive resin layer of the other laminate film are faced and thermally bonded on the flange portion, and the packaging container is sealed.
- the heat-adhesive resin layers of the two laminate films are faced and heat-bonded, so the end faces of both heat-adhesive resin layers are exposed around the flange portion. For this reason, water vapor may enter the packaging container from the end face of the heat-adhesive resin layer, or the electrolytic solution may volatilize from the packaging container, making it difficult to maintain the characteristics of the power storage device for a long period of time.
- An object of the present invention is to provide a power storage device that can maintain its characteristics for a long period of time, an electric vehicle equipped with the same, a packaging container for the power storage device, and a method for manufacturing the same.
- the present invention provides a power storage device in which a power storage member is enclosed in a packaging container, in which the packaging container has a body portion formed in a cylindrical shape by bonding one end of a laminated film to the other end; and a closing part that closes both ends of the body, the laminated film is formed by laminating a base material layer, a barrier layer, and a thermoadhesive resin layer in order from the outer surface side, and one end of the laminated film is It has a folded part in which the processed surface removed in the thickness direction on the outer surface side is folded back so as to overlap, and the thermoadhesive resin layer of the other end of the laminated film is placed on the thermoadhesive resin layer on the outer surface side of the folded part. It is characterized by the fact that the resin layers are layered and thermally bonded.
- the present invention is characterized in that in the electricity storage device having the above structure, the processed surface is formed by removing the laminated film on the outer surface side of the barrier layer.
- the present invention also provides an electricity storage device having the above structure, in which the closing part is formed by a resin block, the electrode penetrates the block, and the body part is heated to the outer surface of the block by the heat-adhesive resin layer. It is characterized by being glued.
- the present invention also provides an electricity storage device having the above structure, in which the closing portion is formed by a metal block, the electrode is formed integrally with the block, and the body portion is formed on the outer surface of the block by the thermally adhesive resin layer. It is characterized by being thermally bonded to.
- the closing portion is formed by thermally adhering the thermoadhesive resin layer at the end of the body in the axial direction, and sandwiching the electrode provided on the power storage member. It is a feature.
- the present invention is also characterized in that the electricity storage device having the above structure is characterized in that the electricity storage member is an electricity storage element in which an electrolyte is arranged between a positive electrode plate and a negative electrode plate.
- the electrolyte may be an electrolytic solution, or may be a separator or a polymer membrane containing electrolytic solution components. Further, the electrolyte may be a solid electrolyte.
- the electric vehicle of the present invention is characterized by being equipped with an electricity storage device having each of the above configurations.
- the present invention also provides a packaging container for a power storage device that encloses a power storage member, including a body formed in a cylindrical shape by bonding one end of a laminated film to the other end, and a closing portion that closes both ends of the body. and the laminated film is formed by laminating a base material layer, a barrier layer, and a thermoadhesive resin layer in order from the outer surface side, and one end portion of the laminated film is removed from the outer surface side in the thickness direction. It has a folded part that is folded back so that the surfaces overlap, and the thermoadhesive resin layer at the other end of the laminated film is overlapped and thermally bonded on the thermoadhesive resin layer on the outer surface side of the folded part. It is characterized by
- the present invention also provides a method for manufacturing a packaging container for an electricity storage device that encapsulates an electricity storage member, wherein the packaging container for an electricity storage device is formed of a laminated film in which a base material layer, a barrier layer of metal foil, and a heat-adhesive resin layer are laminated. It has a cylindrical body, removing the outer surface side of one end of the laminated film in the thickness direction, and folding the removed processed surface so as to overlap to form a folded part;
- the present invention is characterized by comprising the step of overlapping and thermally bonding the thermoadhesive resin layer at the other end of the laminated film on the thermoadhesive resin layer on the outer surface side of the folded portion.
- the body of the packaging container has a folded part in which one end of the laminated film is folded back so as to overlap the processed surface from which the outer surface side has been removed in the thickness direction, and the outer surface side of the folded part has a thermal adhesive property.
- the thermoadhesive resin layer at the other end of the laminated film is layered and thermally bonded onto the resin layer.
- a side view showing an electric vehicle equipped with a power storage device according to a first embodiment of the present invention A top view showing an electric vehicle equipped with a power storage device according to a first embodiment of the present invention
- a perspective view showing a power storage device according to a first embodiment of the present invention A side sectional view showing a power storage device according to a first embodiment of the present invention
- a front sectional view showing a power storage device according to a first embodiment of the present invention Detailed view of H section in Figure 5
- a side sectional view showing a power storage device according to a second embodiment of the present invention A perspective view showing a power storage device according to a third embodiment of the present invention
- FIGS. 1 and 2 show a side view and a top view of an electric vehicle 1 including an electricity storage device 10 according to the first embodiment.
- the electric vehicle 1 includes a drive motor 3 as a power source for driving wheels 2.
- a power storage device 10 is installed under the floor of the body of the electric vehicle 1 as a drive source that supplies power to the drive motor 3.
- the power storage device 10 may be installed on the roof of the electric vehicle 1, or may be installed inside the seat.
- the power storage device 10 is formed by enclosing the power storage member 20 in a packaging container 30.
- the power storage member 20 is formed of a power storage element 21 in which a plurality of positive electrode plates and negative electrode plates are laminated in order with an insulating separator in between.
- An electrolyte is arranged between the positive electrode plate and the negative electrode plate.
- the electrolyte consists of an electrolytic solution.
- a solid electrolyte may be used as the electrolyte.
- Lead terminals 27 and 28 made of metal are connected to the positive electrode plate and the negative electrode plate, respectively.
- the packaging container 30 has a cylindrical body 31 with a substantially rectangular cross section that is open at both ends in the axial direction, and a closing portion 36 that closes both ends of the body 31 in the axial direction.
- the closing portion 36 is formed of a resin block. Electrodes 37 and 38 to which lead terminals 27 and 28 are connected pass through the closed portion 36 .
- the closed portion 36 through which the electrodes 37 and 38 penetrate can be formed. Further, by disposing the electrodes 37 and 38 in a recess formed on the circumferential surface of the closing portion 36 and thermally bonding them to the closing portion 36, it is possible to form the closing portion 36 through which the electrodes 37 and 38 penetrate.
- FIG. 6 shows a detailed view of the H section in FIG. 5.
- the body portion 31 is formed of a laminated film 40, and has a base material layer 41, a barrier layer 42, and a thermoadhesive resin layer 43 in this order from the outer surface side.
- the base material layer 41 is formed of a resin film such as nylon (PA) or polyethylene terephthalate (PET). In order to improve pinhole resistance, insulation properties, etc., the base material layer 41 may be formed by laminating a plurality of resin films made of different materials, such as nylon and polyethylene terephthalate.
- the thickness of the base material layer 41 is, for example, 5 to 1000 ⁇ m, preferably 5 to 30 ⁇ m.
- the barrier layer 42 is formed of an oxide vapor deposited film (silica, alumina, etc.), a metal vapor deposited film (aluminum, etc.), or a metal foil (aluminum, aluminum alloy, stainless steel, titanium, etc.).
- the barrier layer 42 prevents water vapor from entering the packaging container 30.
- the thickness of the barrier layer 42 of the vapor-deposited film is, for example, several nm to several ⁇ m.
- the thickness of the metal foil barrier layer 42 is, for example, 5 to 1000 ⁇ m, preferably 10 to 200 ⁇ m.
- the thermoadhesive resin layer 43 is formed of thermoplastic resin and is thermally bonded to the outer surface of the closing portion 36.
- the thermal adhesive resin layer 43 linear low density polyethylene (LLDPE), low density polyethylene (LDPE), acid modified polyethylene, polypropylene (PP), acid modified polypropylene, polyethylene terephthalate (PET), polybutylene terephthalate (PBT) is used. etc. can be used.
- the thickness of the thermoadhesive resin layer 43 is, for example, 10 to 200 ⁇ m.
- the base material layer 41 and the thermoadhesive resin layer 43 are formed by dry lamination or extrusion lamination on the barrier layer 42 of metal foil or on the film provided with the barrier layer 42 of vapor deposited film.
- a folded part 51 is provided at one end of the laminated film 40. That is, one end of the laminated film 40 is formed with a stepped portion 52 by removing the outer surface side in the thickness direction, and is folded back so as to overlap the processed surface 52a (the outer surface of the stepped portion 52) from which the laminated film 40 has been removed.
- the stepped portion 52 is formed by dry etching, wet etching, cutting, or the like.
- the thermoadhesive resin layer 43 is disposed on the outer surface of one end of the laminated film 40, and is thermally bonded to the thermoadhesive resin layer 43 on the inner surface of the other end.
- the processed surfaces 52a that are folded back and overlapped are bonded by thermocompression bonding, but may also be bonded with an epoxy-based, acrylic-based, polyester-based adhesive, or the like.
- the manufacturing process of the packaging container 30 includes the steps of removing the outer surface side of one end of the laminated film 40 in the thickness direction, folding back the removed processed surface 52a so as to overlap to form the folded part 51, and forming the folded part 51.
- the method includes the step of overlapping and thermally bonding the heat-adhesive resin layer 43 at the other end of the laminated film 40 on the heat-adhesive resin layer 43 on the outer surface side of the film 51 .
- the laminated film 40 can be reliably attached to the envelope by the opposing thermoadhesive resin layers 43, and the packaging container 30 can be sealed. At this time, only the end face of the laminated film 40 on the outer surface side is exposed at the sealed portion of the cylindrical body 31. For this reason, compared to conventional packaging containers in which the end faces of two opposing thermoadhesive resin layers are exposed on the circumferential surface of the flange, or pillow-type packaging containers with a gassho-attached seal, the The exposed area of the adhesive resin layer 43 can be reduced to about half. This suppresses the infiltration of water vapor into the interior of the power storage device 10 and the volatilization of the electrolyte in the power storage member 20. Therefore, the water vapor barrier properties of the power storage device 10 are improved and the characteristics of the power storage device 10 can be maintained for a long period of time, so that the lifespan of the power storage device 10 can be dramatically improved and extended.
- the processed surface 52a is formed by removing the laminated film 40 on the outer side of the barrier layer 42, and the folded barrier layer 52 remains in the folded part 51. Therefore, deterioration in the barrier properties of the packaging container 30 can be further suppressed.
- the conventional flange portion and the sealed portion of the laminated film do not protrude from the circumferential surface of the power storage device 10. Therefore, it is possible to prevent a decrease in volumetric efficiency when a plurality of power storage devices 10 are arranged in parallel, and it is also possible to omit the step of bending the flange on the circumferential surface in order to avoid a decrease in volumetric efficiency.
- the barrier layer 42 is not exposed on the inner surface of the packaging container 30, short circuits of the power storage member 20 can be prevented when the barrier layer 42 is formed of metal foil or a metal vapor deposited film.
- the body 31 of the packaging container 30 has a folded part 51 formed by folding back the processed surface 52a, which is obtained by removing the outer surface side of one end of the laminated film 40 in the thickness direction, so as to overlap. Then, the thermoadhesive resin layer 43 at the other end of the laminated film 40 is overlapped and thermally bonded onto the thermoadhesive resin layer 43 on the outer surface side of the folded portion 51 .
- the exposed area of the heat adhesive resin layer 43 can be reduced compared to the conventional case, and it is possible to suppress the infiltration of water vapor into the interior of the power storage device 10 and the volatilization of the electrolytic solution of the power storage member 20. Therefore, the water vapor barrier properties of the power storage device 10 are improved and the characteristics of the power storage device 10 can be maintained for a long period of time, so that the lifespan of the power storage device 10 can be dramatically improved and extended.
- the manufacturing process of the packaging container 30 includes a step of removing the outer surface side of one end of the laminated film 40 in the thickness direction, and folding back the removed processed surface so as to overlap to form a folded part 51.
- the step of overlapping and thermally bonding the thermoadhesive resin layer 43 at the other end of the laminated film 40 on the thermoadhesive resin layer 43 on the outer surface side of the laminate film 40 is provided.
- the processed surface 52a that is overlapped when forming the folded portion 51 is formed by removing the layered film 40 on the outer surface side of the barrier layer 42. Thereby, deterioration of the barrier properties of the packaging container 30 can be suppressed.
- a closing portion 36 is formed by a resin block through which the electrodes 37 and 38 pass, and the body portion 31 is thermally bonded to the outer surface of the block. Thereby, both axial ends of the body portion 31 can be easily sealed.
- FIG. 7 shows a side sectional view of the electricity storage device 10 of the second embodiment.
- the same reference numerals are given to the same parts as in the first embodiment shown in FIGS. 1 to 6 described above.
- the closing portion 36 of the packaging container 30 is formed of metal. Other parts are the same as those in the first embodiment.
- the closing part 36 of the packaging container 30 is formed of a metal block, and the electrodes 37 and 38 are formed integrally with the closing part 36.
- the body portion 31 is bonded to the block forming the closing portion 36 by a heat-adhesive resin layer 43.
- the thermal adhesive resin layer 43 uses a resin with low adhesiveness to metal members, such as linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), or polypropylene (PP),
- LLDPE linear low-density polyethylene
- LDPE low-density polyethylene
- PP polypropylene
- the closing portion 36 and the cylindrical portion can be thermally bonded via the film.
- the metal adhesive film for example, a single layer film of acid-modified polypropylene, a multilayer film of acid-modified polypropylene and polypropylene, etc. can be used.
- the body 31 of the packaging container 30 is placed on the thermoadhesive resin layer 43 at the other end of the laminated film 40 on the thermoadhesive resin layer 43 on the outer surface side of the folded part 51. are overlapped and thermally bonded.
- the closing portion 36 is formed of a metal block integral with the electrodes 37 and 38, and the body portion 31 is thermally bonded to the outer surface of the block. Thereby, both axial ends of the body portion 31 can be easily sealed.
- FIGS. 8 and 9 show a perspective view and a front sectional view of the electricity storage device 10 of the third embodiment.
- the power storage member 20 is formed of a power storage element in which an electrolyte is arranged between a positive electrode plate and a negative electrode plate.
- Other parts are the same as those in the first embodiment.
- the power storage element 21 constituting the power storage member 20 is formed by arranging a positive electrode plate and a negative electrode plate (both not shown) facing each other with an insulating separator (not shown) interposed therebetween.
- An electrolyte is arranged between the positive electrode plate and the negative electrode plate.
- the electrolyte consists of an electrolytic solution, and is filled inside the packaging container 30.
- a solid electrolyte may be used as the electrolyte.
- Electrodes 37 and 38 made of metal are connected to the positive electrode plate and the negative electrode plate, respectively.
- the body 31 of the packaging container 30 is formed of the laminated film 40 shown in FIG. 6 described above. Both axial ends of the body portion 31 are closed by closing portions 36 to which a heat-adhesive resin layer 43 (see FIG. 6) is thermally bonded.
- the electrodes 37 and 38 are sandwiched between the thermoadhesive resin layer 43 of the closing portion 36 and protrude from the body portion 31 in the axial direction.
- the body 31 of the packaging container 30 is placed on the thermoadhesive resin layer 43 on the outer surface side of the folded portion 51 (see FIG. 6), and the other end of the laminated film 40 is Thermal adhesive resin layers 43 are overlapped and thermally bonded.
- the closing portion 36 is formed by thermally bonding the thermally adhesive resin layer 43 at the end of the body portion 31, and sandwiches the electrodes 37 and 38 provided on the power storage member 20. Thereby, both axial ends of the body portion 31 can be easily sealed.
- the power storage member 20 is a power storage element 21 in which an electrolyte is arranged between a positive electrode plate and a negative electrode plate
- the power storage device 10 in which the power storage member 20 consisting of the power storage element 21 filled with an electrolytic solution is enclosed can be easily realized. can do.
- the cross-sectional shape of the body 31 of the packaging container 20 may be other shapes such as a polygon, circle, or ellipse.
- the power storage member 20 may be a bipolar type in which a plurality of power storage elements 21 are stacked and connected in series, and metal tabs provided on both end faces in the stacking direction are connected to the electrodes 37 and 38.
- the power storage member 20 that supplies power to the drive motor 3 is made of a secondary battery, it may be a capacitor (an electrolytic capacitor, an electric double layer capacitor, a lithium ion capacitor, etc.).
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Abstract
In an electricity storage device 10 obtained by sealing an electricity storage member 20 in a packaging container 30, the packaging container 30 comprises a cylindrical body portion 31 and closing portions 36 that close both ends of the body portion 31, and a laminated film 40 is formed by laminating a base layer 41, a metal-foil barrier layer 42, and a thermal adhesive resin layer 43 in an order from the outer surface side. One end portion of the laminated film 40 has a folded-back portion 51 in which a processed surface 52a obtained by removing the outer surface side in the thickness direction is folded back so as to overlap, and the thermal adhesive resin layer 43 in the other end portion of the laminated film 40 is laminated on the thermal adhesive resin layer 43 on the outer surface side of the folded-back portion 51 and thermally adhered thereto.
Description
本発明は、包装容器により密封される蓄電デバイス及びそれを備えた電動自動車に関する。また本発明は、蓄電デバイス用包装容器及びその製造方法に関する。
The present invention relates to an electricity storage device sealed by a packaging container and an electric vehicle equipped with the same. The present invention also relates to a packaging container for an electricity storage device and a method for manufacturing the same.
近年、環境対策や省資源化等の観点から、駆動力の少なくとも一部をモータが供給する電動自動車が注目されている。この電動自動車には、電気自動車（ＥＶ）、ハイブリッド自動車（ＨＥＶ）、プラグインハイブリッド自動車（ＰＨＥＶ）等がある。電気自動車はモータのみを動力源とし、ハイブリッド自動車及びプラグインハイブリッド自動車はモータ及びエンジンを動力源とする。
In recent years, electric vehicles, in which a motor supplies at least a portion of the driving force, have been attracting attention from the viewpoint of environmental measures and resource conservation. This electric vehicle includes an electric vehicle (EV), a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHEV), and the like. Electric vehicles use only a motor as a power source, and hybrid vehicles and plug-in hybrid vehicles use a motor and an engine as power sources.
電動自動車に搭載される従来の蓄電デバイスは特許文献１に開示される。この蓄電デバイスは直列接続及び並列接続によって複数並設され、電動自動車の床下等に設置される。蓄電デバイスは二次電池から成る複数の単電池を備え、バイポーラ型に構成される。複数の単電池は積層され、積層方向の両端面に正極電極及び負極電極がそれぞれ接続される。蓄電デバイスは包装容器により覆われ、正極電極及び負極電極を引き出した状態で密封される。
A conventional power storage device mounted on an electric vehicle is disclosed in Patent Document 1. A plurality of these power storage devices are connected in series and in parallel, and are installed under the floor of an electric vehicle. The power storage device includes a plurality of cells made of secondary batteries and is configured in a bipolar type. A plurality of unit cells are stacked, and a positive electrode and a negative electrode are respectively connected to both end faces in the stacking direction. The electricity storage device is covered with a packaging container and sealed with the positive electrode and negative electrode pulled out.
包装容器は熱接着性樹脂層を有した２つのラミネートフィルムにより形成される。一方のラミネートフィルムには積層された単電池を収納する収納部が凹設され、収納部の周囲にフランジ部が設けられる。フランジ部上で一方のラミネートフィルムの熱接着性樹脂層と他方のラミネートフィルムの熱接着性樹脂層とが対向して熱接着され、包装容器が密封される。
The packaging container is formed by two laminate films with a thermoadhesive resin layer. One of the laminate films has a recessed storage section for storing the stacked unit cells, and a flange section is provided around the storage section. The heat-adhesive resin layer of one laminate film and the heat-adhesive resin layer of the other laminate film are faced and thermally bonded on the flange portion, and the packaging container is sealed.
しかしながら、上記従来の蓄電デバイスによると、２つのラミネートフィルムの熱接着性樹脂層が対向して熱接着されるため、フランジ部の周囲に両方の熱接着性樹脂層の端面が露出する。このため、熱接着性樹脂層の端面から包装容器内に水蒸気が浸入する場合や包装容器から電解液が揮発する場合があり、蓄電デバイスの特性の長期保持が困難になる問題があった。
However, according to the above-mentioned conventional power storage device, the heat-adhesive resin layers of the two laminate films are faced and heat-bonded, so the end faces of both heat-adhesive resin layers are exposed around the flange portion. For this reason, water vapor may enter the packaging container from the end face of the heat-adhesive resin layer, or the electrolytic solution may volatilize from the packaging container, making it difficult to maintain the characteristics of the power storage device for a long period of time.
本発明は、特性を長期保持できる蓄電デバイス、それを備えた電動自動車、蓄電デバイス用包装容器及びその製造方法を提供することを目的とする。
An object of the present invention is to provide a power storage device that can maintain its characteristics for a long period of time, an electric vehicle equipped with the same, a packaging container for the power storage device, and a method for manufacturing the same.
上記目的を達成するために本発明は、蓄電部材を包装容器に封入した蓄電デバイスにおいて、前記包装容器が積層フィルムの一端部を他端部に接着して筒状に形成された胴部と、前記胴部の両端を閉塞する閉塞部とを有し、前記積層フィルムが外面側から順に、基材層、バリア層、熱接着性樹脂層を積層して形成され、前記積層フィルムの一端部が外面側を厚み方向に除去された加工面を重なるように折り返した折返し部を有し、前記折返し部の外面側の前記熱接着性樹脂層上に前記積層フィルムの他端部の前記熱接着性樹脂層が重ねて熱接着されることを特徴としている。
In order to achieve the above object, the present invention provides a power storage device in which a power storage member is enclosed in a packaging container, in which the packaging container has a body portion formed in a cylindrical shape by bonding one end of a laminated film to the other end; and a closing part that closes both ends of the body, the laminated film is formed by laminating a base material layer, a barrier layer, and a thermoadhesive resin layer in order from the outer surface side, and one end of the laminated film is It has a folded part in which the processed surface removed in the thickness direction on the outer surface side is folded back so as to overlap, and the thermoadhesive resin layer of the other end of the laminated film is placed on the thermoadhesive resin layer on the outer surface side of the folded part. It is characterized by the fact that the resin layers are layered and thermally bonded.
また本発明は上記構成の蓄電デバイスにおいて、前記加工面が前記バリア層よりも外面側の積層フィルムを除去して形成されていることを特徴としている。
Further, the present invention is characterized in that in the electricity storage device having the above structure, the processed surface is formed by removing the laminated film on the outer surface side of the barrier layer.
また本発明は上記構成の蓄電デバイスにおいて、前記閉塞部が樹脂製のブロックにより形成されるとともに、電極が前記ブロックを貫通し、前記胴部が前記熱接着性樹脂層により前記ブロックの外面に熱接着されることを特徴としている。
The present invention also provides an electricity storage device having the above structure, in which the closing part is formed by a resin block, the electrode penetrates the block, and the body part is heated to the outer surface of the block by the heat-adhesive resin layer. It is characterized by being glued.
また本発明は上記構成の蓄電デバイスにおいて、前記閉塞部が金属製のブロックにより形成されるとともに、電極が前記ブロックと一体に形成され、前記胴部が前記熱接着性樹脂層により前記ブロックの外面に熱接着されることを特徴としている。
The present invention also provides an electricity storage device having the above structure, in which the closing portion is formed by a metal block, the electrode is formed integrally with the block, and the body portion is formed on the outer surface of the block by the thermally adhesive resin layer. It is characterized by being thermally bonded to.
また本発明は上記構成の蓄電デバイスにおいて、前記閉塞部は前記胴部の軸方向の端部の前記熱接着性樹脂層を熱接着して形成され、前記蓄電部材に設けた電極を挟むことを特徴としている。
Further, in the power storage device of the present invention, the closing portion is formed by thermally adhering the thermoadhesive resin layer at the end of the body in the axial direction, and sandwiching the electrode provided on the power storage member. It is a feature.
また本発明は上記構成の蓄電デバイスにおいて、前記蓄電部材が、正極板と負極板との間に電解質を配した蓄電素子であることを特徴としている。尚、電解質は電解液でもよく、電解液成分を含むセパレータや高分子膜でもよい。また電解質は固体電解質でもよい。
The present invention is also characterized in that the electricity storage device having the above structure is characterized in that the electricity storage member is an electricity storage element in which an electrolyte is arranged between a positive electrode plate and a negative electrode plate. Note that the electrolyte may be an electrolytic solution, or may be a separator or a polymer membrane containing electrolytic solution components. Further, the electrolyte may be a solid electrolyte.
また本発明の電動自動車は、上記各構成の蓄電デバイスを備えたことを特徴としている。
Furthermore, the electric vehicle of the present invention is characterized by being equipped with an electricity storage device having each of the above configurations.
また本発明は、蓄電部材を封入する蓄電デバイス用包装容器において、積層フィルムの一端部を他端部に接着して筒状に形成された胴部と、前記胴部の両端を閉塞する閉塞部とを有し、前記積層フィルムが外面側から順に、基材層、バリア層、熱接着性樹脂層を積層して形成され、前記積層フィルムの一端部が外面側を厚み方向に除去された加工面を重なるように折り返した折返し部を有し、前記折返し部の外面側の前記熱接着性樹脂層上に前記積層フィルムの他端部の前記熱接着性樹脂層が重ねて熱接着されることを特徴としている。
The present invention also provides a packaging container for a power storage device that encloses a power storage member, including a body formed in a cylindrical shape by bonding one end of a laminated film to the other end, and a closing portion that closes both ends of the body. and the laminated film is formed by laminating a base material layer, a barrier layer, and a thermoadhesive resin layer in order from the outer surface side, and one end portion of the laminated film is removed from the outer surface side in the thickness direction. It has a folded part that is folded back so that the surfaces overlap, and the thermoadhesive resin layer at the other end of the laminated film is overlapped and thermally bonded on the thermoadhesive resin layer on the outer surface side of the folded part. It is characterized by
また本発明は、蓄電部材を封入する蓄電デバイス用包装容器の製造方法において、前記蓄電デバイス用包装容器が基材層、金属箔のバリア層、熱接着性樹脂層を積層した積層フィルムにより形成される筒状の胴部を有し、
前記積層フィルムの一端部の外面側を厚み方向に除去し、その除去された加工面を重なるように折り返して折返し部を形成する工程と、
前記折返し部の外面側の前記熱接着性樹脂層上に前記積層フィルムの他端部の前記熱接着性樹脂層を重ねて熱接着する工程と、を備えたことを特徴としている。 The present invention also provides a method for manufacturing a packaging container for an electricity storage device that encapsulates an electricity storage member, wherein the packaging container for an electricity storage device is formed of a laminated film in which a base material layer, a barrier layer of metal foil, and a heat-adhesive resin layer are laminated. It has a cylindrical body,
removing the outer surface side of one end of the laminated film in the thickness direction, and folding the removed processed surface so as to overlap to form a folded part;
The present invention is characterized by comprising the step of overlapping and thermally bonding the thermoadhesive resin layer at the other end of the laminated film on the thermoadhesive resin layer on the outer surface side of the folded portion.
前記積層フィルムの一端部の外面側を厚み方向に除去し、その除去された加工面を重なるように折り返して折返し部を形成する工程と、
前記折返し部の外面側の前記熱接着性樹脂層上に前記積層フィルムの他端部の前記熱接着性樹脂層を重ねて熱接着する工程と、を備えたことを特徴としている。 The present invention also provides a method for manufacturing a packaging container for an electricity storage device that encapsulates an electricity storage member, wherein the packaging container for an electricity storage device is formed of a laminated film in which a base material layer, a barrier layer of metal foil, and a heat-adhesive resin layer are laminated. It has a cylindrical body,
removing the outer surface side of one end of the laminated film in the thickness direction, and folding the removed processed surface so as to overlap to form a folded part;
The present invention is characterized by comprising the step of overlapping and thermally bonding the thermoadhesive resin layer at the other end of the laminated film on the thermoadhesive resin layer on the outer surface side of the folded portion.
本発明によると、包装容器の胴部が、積層フィルムの一端部が外面側を厚み方向に除去された加工面を重なるように折り返した折返し部を有し、折返し部の外面側の熱接着性樹脂層上に積層フィルムの他端部の熱接着性樹脂層が重ねて熱接着される。これにより、蓄電デバイスの水蒸気バリア性が向上して蓄電デバイスの特性を長期維持できるため、蓄電デバイスの寿命を飛躍的に向上して長寿命化することができる。また、蓄電デバイスを複数並設した際の容積効率低下を防止できるとともに、従来のようなフランジを周面上に折曲する工程を省いて蓄電デバイスの製造工数を削減することができる。また、包装容器の内面側に金属箔が露出しないため、蓄電部材の短絡を防止することができる。
According to the present invention, the body of the packaging container has a folded part in which one end of the laminated film is folded back so as to overlap the processed surface from which the outer surface side has been removed in the thickness direction, and the outer surface side of the folded part has a thermal adhesive property. The thermoadhesive resin layer at the other end of the laminated film is layered and thermally bonded onto the resin layer. As a result, the water vapor barrier properties of the power storage device are improved and the characteristics of the power storage device can be maintained for a long period of time, so that the life of the power storage device can be dramatically improved and extended. Furthermore, it is possible to prevent a decrease in volumetric efficiency when a plurality of power storage devices are arranged in parallel, and it is possible to reduce the number of manufacturing steps for the power storage device by omitting the conventional process of bending a flange onto the circumferential surface. Furthermore, since the metal foil is not exposed on the inner surface of the packaging container, short circuits of the electricity storage member can be prevented.
＜第１実施形態＞
以下に図面を参照して本発明の実施形態を説明する。図１、図２は第１実施形態の蓄電デバイス１０を備えた電動自動車１の側面図及び上面図を示している。電動自動車１は車輪２を駆動する動力源として駆動モータ３を備えている。電動自動車１の車体のフロア下には駆動モータ３に電力を供給する駆動源として蓄電デバイス１０が設置される。蓄電デバイス１０を電動自動車１のルーフに設置してもよく、座席内に設置してもよい。 <First embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a side view and a top view of an electric vehicle 1 including anelectricity storage device 10 according to the first embodiment. The electric vehicle 1 includes a drive motor 3 as a power source for driving wheels 2. A power storage device 10 is installed under the floor of the body of the electric vehicle 1 as a drive source that supplies power to the drive motor 3. The power storage device 10 may be installed on the roof of the electric vehicle 1, or may be installed inside the seat.
以下に図面を参照して本発明の実施形態を説明する。図１、図２は第１実施形態の蓄電デバイス１０を備えた電動自動車１の側面図及び上面図を示している。電動自動車１は車輪２を駆動する動力源として駆動モータ３を備えている。電動自動車１の車体のフロア下には駆動モータ３に電力を供給する駆動源として蓄電デバイス１０が設置される。蓄電デバイス１０を電動自動車１のルーフに設置してもよく、座席内に設置してもよい。 <First embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a side view and a top view of an electric vehicle 1 including an
図３、図４、図５は蓄電デバイス１０の斜視図、側面断面図及び正面断面図を示している。蓄電デバイス１０は蓄電部材２０を包装容器３０に封入して形成される。蓄電部材２０は複数の正極板及び負極板を絶縁体のセパレータを挟んで順に積層した蓄電素子２１により形成される。正極板と負極板との間には電解質が配される。本実施形態では電解質が電解液から成っている。電解質として固体電解質を用いてもよい。正極板及び負極板にはそれぞれ金属から成るリード端子２７、２８が接続される。
3, 4, and 5 show a perspective view, a side sectional view, and a front sectional view of the electricity storage device 10. The power storage device 10 is formed by enclosing the power storage member 20 in a packaging container 30. The power storage member 20 is formed of a power storage element 21 in which a plurality of positive electrode plates and negative electrode plates are laminated in order with an insulating separator in between. An electrolyte is arranged between the positive electrode plate and the negative electrode plate. In this embodiment, the electrolyte consists of an electrolytic solution. A solid electrolyte may be used as the electrolyte. Lead terminals 27 and 28 made of metal are connected to the positive electrode plate and the negative electrode plate, respectively.
包装容器３０は、軸方向の両端を開放した断面略矩形の筒状の胴部３１と、胴部３１の軸方向両端を閉塞する閉塞部３６と、を有している。閉塞部３６は樹脂製のブロックにより形成される。閉塞部３６にはリード端子２７、２８を接続される電極３７、３８が貫通する。
The packaging container 30 has a cylindrical body 31 with a substantially rectangular cross section that is open at both ends in the axial direction, and a closing portion 36 that closes both ends of the body 31 in the axial direction. The closing portion 36 is formed of a resin block. Electrodes 37 and 38 to which lead terminals 27 and 28 are connected pass through the closed portion 36 .
例えば、樹脂製のブロックの半体で電極３７、３８を挟み、ブロックの半体を熱接着することにより、電極３７、３８が貫通した閉塞部３６を形成することができる。また、閉塞部３６の周面上に凹設した凹部に電極３７、３８を配して閉塞部３６と熱接着することにより、電極３７、３８が貫通した閉塞部３６を形成することができる。
For example, by sandwiching the electrodes 37 and 38 between resin block halves and thermally bonding the block halves, the closed portion 36 through which the electrodes 37 and 38 penetrate can be formed. Further, by disposing the electrodes 37 and 38 in a recess formed on the circumferential surface of the closing portion 36 and thermally bonding them to the closing portion 36, it is possible to form the closing portion 36 through which the electrodes 37 and 38 penetrate.
図６は図５のＨ部詳細図を示している。胴部３１は積層フィルム４０により形成され、外面側から順に基材層４１、バリア層４２、熱接着性樹脂層４３を有している。
FIG. 6 shows a detailed view of the H section in FIG. 5. The body portion 31 is formed of a laminated film 40, and has a base material layer 41, a barrier layer 42, and a thermoadhesive resin layer 43 in this order from the outer surface side.
基材層４１はナイロン（ＰＡ）、ポリエチレンテレフタレート（ＰＥＴ）等の樹脂フィルムにより形成される。耐ピンホール性、絶縁性等の向上のために、例えばナイロン及びポリエチレンテレフタレート等の異なる素材の樹脂フィルムを複数積層して基材層４１を形成してもよい。基材層４１の厚みは例えば、５～１０００μｍ、好ましくは５～３０μｍである。
The base material layer 41 is formed of a resin film such as nylon (PA) or polyethylene terephthalate (PET). In order to improve pinhole resistance, insulation properties, etc., the base material layer 41 may be formed by laminating a plurality of resin films made of different materials, such as nylon and polyethylene terephthalate. The thickness of the base material layer 41 is, for example, 5 to 1000 μm, preferably 5 to 30 μm.
バリア層４２は、酸化物蒸着膜（シリカ、アルミナ等）、金属蒸着膜（アルミニウム等）、または金属箔（アルミニウム、アルミニウム合金、ステンレス鋼、チタン等）により形成される。バリア層４２により包装容器３０内への水蒸気の浸入が防止される。蒸着膜のバリア層４２の厚みは例えば、数ｎｍ～数μｍである。金属箔のバリア層４２の厚みは例えば、５～１０００μｍ、好ましくは１０～２００μｍである。
The barrier layer 42 is formed of an oxide vapor deposited film (silica, alumina, etc.), a metal vapor deposited film (aluminum, etc.), or a metal foil (aluminum, aluminum alloy, stainless steel, titanium, etc.). The barrier layer 42 prevents water vapor from entering the packaging container 30. The thickness of the barrier layer 42 of the vapor-deposited film is, for example, several nm to several μm. The thickness of the metal foil barrier layer 42 is, for example, 5 to 1000 μm, preferably 10 to 200 μm.
熱接着性樹脂層４３は熱可塑性の樹脂により形成され、閉塞部３６の外面に熱接着される。熱接着性樹脂層４３として、直鎖状低密度ポリエチレン（ＬＬＤＰＥ）、低密度ポリエチレン（ＬＤＰＥ）、酸変性ポリエチレン、ポリプロピレン（ＰＰ）、酸変性ポリプロピレン、ポリエチレンテレフタレート（ＰＥＴ）、ポリブチレンテレフタレート（ＰＢＴ）等を用いることができる。熱接着性樹脂層４３の厚みは例えば１０～２００μｍである。尚、金属箔のバリア層４２上または蒸着膜のバリア層４２を設けたフィルム上に、基材層４１及び熱接着性樹脂層４３がドライラミネートまたは押出ラミネートにより形成される。
The thermoadhesive resin layer 43 is formed of thermoplastic resin and is thermally bonded to the outer surface of the closing portion 36. As the thermal adhesive resin layer 43, linear low density polyethylene (LLDPE), low density polyethylene (LDPE), acid modified polyethylene, polypropylene (PP), acid modified polypropylene, polyethylene terephthalate (PET), polybutylene terephthalate (PBT) is used. etc. can be used. The thickness of the thermoadhesive resin layer 43 is, for example, 10 to 200 μm. Note that the base material layer 41 and the thermoadhesive resin layer 43 are formed by dry lamination or extrusion lamination on the barrier layer 42 of metal foil or on the film provided with the barrier layer 42 of vapor deposited film.
積層フィルム４０の一端部には折返し部５１が設けられる。即ち、積層フィルム４０の一端部は、外面側を厚み方向に除去して段差部５２を形成され、積層フィルム４０を除去された加工面５２ａ（段差部５２の外面）を重なるように折り返される。段差部５２はドライエッチング、ウェットエッチング、切削加工等により形成される。これにより、積層フィルム４０の一端部の外面上に熱接着性樹脂層４３が配され、他端部の内面の熱接着性樹脂層４３と熱接着される。この時、折り返して重ねられる加工面５２ａは熱圧着して接着されるが、エポキシ系、アクリル系、ポリエステル系等の接着剤で接着してもよい。
A folded part 51 is provided at one end of the laminated film 40. That is, one end of the laminated film 40 is formed with a stepped portion 52 by removing the outer surface side in the thickness direction, and is folded back so as to overlap the processed surface 52a (the outer surface of the stepped portion 52) from which the laminated film 40 has been removed. The stepped portion 52 is formed by dry etching, wet etching, cutting, or the like. As a result, the thermoadhesive resin layer 43 is disposed on the outer surface of one end of the laminated film 40, and is thermally bonded to the thermoadhesive resin layer 43 on the inner surface of the other end. At this time, the processed surfaces 52a that are folded back and overlapped are bonded by thermocompression bonding, but may also be bonded with an epoxy-based, acrylic-based, polyester-based adhesive, or the like.
従って、包装容器３０の製造工程は、積層フィルム４０の一端部の外面側を厚み方向に除去し、その除去された加工面５２ａを重なるように折り返して折返し部５１を形成する工程と、折返し部５１の外面側の熱接着性樹脂層４３上に積層フィルム４０の他端部の熱接着性樹脂層４３を重ねて熱接着する工程と、を備える。
Therefore, the manufacturing process of the packaging container 30 includes the steps of removing the outer surface side of one end of the laminated film 40 in the thickness direction, folding back the removed processed surface 52a so as to overlap to form the folded part 51, and forming the folded part 51. The method includes the step of overlapping and thermally bonding the heat-adhesive resin layer 43 at the other end of the laminated film 40 on the heat-adhesive resin layer 43 on the outer surface side of the film 51 .
これにより、対向する熱接着性樹脂層４３によって積層フィルム４０を確実に封筒貼りして包装容器３０を密封することができる。この時、筒状の胴部３１のシール部において外面側の積層フィルム４０の端面が露出しているだけである。このため、従来例のように対向する２つの熱接着性樹脂層の端面がフランジ部の周面に露出する包装容器や、合掌貼りのシール部を備えたピロー型の包装容器に比べて、熱接着性樹脂層４３の露出面積が約半分に減少させることができる。これにより、蓄電デバイス１０内部への水蒸気の浸入や蓄電部材２０の電解液の揮発が抑制される。従って、蓄電デバイス１０の水蒸気バリア性が向上して蓄電デバイス１０の特性を長期維持できるため、蓄電デバイス１０の寿命を飛躍的に向上して長寿命化することができる。
Thereby, the laminated film 40 can be reliably attached to the envelope by the opposing thermoadhesive resin layers 43, and the packaging container 30 can be sealed. At this time, only the end face of the laminated film 40 on the outer surface side is exposed at the sealed portion of the cylindrical body 31. For this reason, compared to conventional packaging containers in which the end faces of two opposing thermoadhesive resin layers are exposed on the circumferential surface of the flange, or pillow-type packaging containers with a gassho-attached seal, the The exposed area of the adhesive resin layer 43 can be reduced to about half. This suppresses the infiltration of water vapor into the interior of the power storage device 10 and the volatilization of the electrolyte in the power storage member 20. Therefore, the water vapor barrier properties of the power storage device 10 are improved and the characteristics of the power storage device 10 can be maintained for a long period of time, so that the lifespan of the power storage device 10 can be dramatically improved and extended.
また、バリア層４２よりも外面側の積層フィルム４０を除去して加工面５２ａが形成され、折返し部５１内に折り返されたバリア層５２が残る。このため、包装容器３０のバリア性の低下をより抑制することができる。
Further, the processed surface 52a is formed by removing the laminated film 40 on the outer side of the barrier layer 42, and the folded barrier layer 52 remains in the folded part 51. Therefore, deterioration in the barrier properties of the packaging container 30 can be further suppressed.
更に、蓄電デバイス１０の周面から従来のようなフランジ部や、積層フィルムの合掌貼りによるシール部分が突出しない。従って、蓄電デバイス１０を複数並設した際の容積効率低下を防止できるとともに、容積効率低下を回避するためにフランジを周面上に折曲する工程を省くことできる。加えて、バリア層４２が包装容器３０の内面に露出しないため、金属箔または金属蒸着膜によりバリア層４２を形成した場合に蓄電部材２０の短絡を防止することができる。
Further, the conventional flange portion and the sealed portion of the laminated film do not protrude from the circumferential surface of the power storage device 10. Therefore, it is possible to prevent a decrease in volumetric efficiency when a plurality of power storage devices 10 are arranged in parallel, and it is also possible to omit the step of bending the flange on the circumferential surface in order to avoid a decrease in volumetric efficiency. In addition, since the barrier layer 42 is not exposed on the inner surface of the packaging container 30, short circuits of the power storage member 20 can be prevented when the barrier layer 42 is formed of metal foil or a metal vapor deposited film.
本実施形態によると、包装容器３０の胴部３１が積層フィルム４０の一端部の外面側を厚み方向に除去された加工面５２ａを重なるように折り返した折返し部５１を有する。そして、折返し部５１の外面側の熱接着性樹脂層４３上に積層フィルム４０の他端部の熱接着性樹脂層４３が重ねて熱接着される。
According to this embodiment, the body 31 of the packaging container 30 has a folded part 51 formed by folding back the processed surface 52a, which is obtained by removing the outer surface side of one end of the laminated film 40 in the thickness direction, so as to overlap. Then, the thermoadhesive resin layer 43 at the other end of the laminated film 40 is overlapped and thermally bonded onto the thermoadhesive resin layer 43 on the outer surface side of the folded portion 51 .
これにより、従来よりも熱接着性樹脂層４３の露出面積を減少させることができ、蓄電デバイス１０内部への水蒸気の浸入や蓄電部材２０の電解液の揮発を抑制することができる。従って、蓄電デバイス１０の水蒸気バリア性が向上して蓄電デバイス１０の特性を長期維持できるため、蓄電デバイス１０の寿命を飛躍的に向上して長寿命化することができる。
As a result, the exposed area of the heat adhesive resin layer 43 can be reduced compared to the conventional case, and it is possible to suppress the infiltration of water vapor into the interior of the power storage device 10 and the volatilization of the electrolytic solution of the power storage member 20. Therefore, the water vapor barrier properties of the power storage device 10 are improved and the characteristics of the power storage device 10 can be maintained for a long period of time, so that the lifespan of the power storage device 10 can be dramatically improved and extended.
また、蓄電デバイス１０を複数並設した際の容積効率低下を防止できるとともに、従来のようなフランジを周面上に折曲する工程を省いて蓄電デバイス１０の製造工数を削減することができる。また、包装容器３０の内面側に金属箔または金属蒸着膜のバリア層４２が露出しないため、蓄電部材２０の短絡を防止することができる。
Further, it is possible to prevent a decrease in volumetric efficiency when a plurality of power storage devices 10 are arranged side by side, and it is possible to reduce the number of manufacturing steps for the power storage device 10 by omitting the conventional process of bending the flange on the circumferential surface. Moreover, since the barrier layer 42 of metal foil or metal vapor deposition film is not exposed on the inner surface side of the packaging container 30, short circuits of the electricity storage member 20 can be prevented.
また、包装容器３０の製造工程が、積層フィルム４０の一端部の外面側を厚み方向に除去し、その除去された加工面を重なるように折り返して折返し部５１を形成する工程と、折返し部５１の外面側の熱接着性樹脂層４３上に積層フィルム４０の他端部の熱接着性樹脂層４３を重ねて熱接着する工程と、を備える。これにより、蓄電デバイス１０の並設時の容積効率を向上して蓄電部材２０の短絡を防止できる包装容器３０を容易に実現することができる。
In addition, the manufacturing process of the packaging container 30 includes a step of removing the outer surface side of one end of the laminated film 40 in the thickness direction, and folding back the removed processed surface so as to overlap to form a folded part 51. The step of overlapping and thermally bonding the thermoadhesive resin layer 43 at the other end of the laminated film 40 on the thermoadhesive resin layer 43 on the outer surface side of the laminate film 40 is provided. Thereby, it is possible to easily realize the packaging container 30 that can improve the volumetric efficiency when the power storage devices 10 are arranged side by side and prevent short circuits of the power storage members 20.
また、折返し部５１を形成する際に重ねられる加工面５２ａがバリア層４２よりも外面側の積層フィルム４０を除去して形成されている。これにより、包装容器３０のバリア性の低下を抑制することができる。
Further, the processed surface 52a that is overlapped when forming the folded portion 51 is formed by removing the layered film 40 on the outer surface side of the barrier layer 42. Thereby, deterioration of the barrier properties of the packaging container 30 can be suppressed.
また、電極３７、３８が貫通する樹脂製のブロックにより閉塞部３６が形成され、胴部３１がブロックの外面に熱接着される。これにより、胴部３１の軸方向両端部を容易に密閉することができる。
Further, a closing portion 36 is formed by a resin block through which the electrodes 37 and 38 pass, and the body portion 31 is thermally bonded to the outer surface of the block. Thereby, both axial ends of the body portion 31 can be easily sealed.
＜第２実施形態＞
次に、図７は第２実施形態の蓄電デバイス１０の側面断面図を示している。説明の便宜上、前述の図１～図６に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は包装容器３０の閉塞部３６が金属により形成される。その他の部分は第１実施形態と同様である。 <Second embodiment>
Next, FIG. 7 shows a side sectional view of theelectricity storage device 10 of the second embodiment. For convenience of explanation, the same reference numerals are given to the same parts as in the first embodiment shown in FIGS. 1 to 6 described above. In this embodiment, the closing portion 36 of the packaging container 30 is formed of metal. Other parts are the same as those in the first embodiment.
次に、図７は第２実施形態の蓄電デバイス１０の側面断面図を示している。説明の便宜上、前述の図１～図６に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は包装容器３０の閉塞部３６が金属により形成される。その他の部分は第１実施形態と同様である。 <Second embodiment>
Next, FIG. 7 shows a side sectional view of the
包装容器３０の閉塞部３６は金属製のブロックにより形成され、電極３７、３８は閉塞部３６と一体に形成される。胴部３１は閉塞部３６を形成するブロックと熱接着性樹脂層４３により接着される。この時、熱接着性樹脂層４３として酸変性ポリプロピレンや酸変性ポリエチレンを用いると、閉塞部３６を形成する金属部材に対する接着性が高いためより望ましい。
The closing part 36 of the packaging container 30 is formed of a metal block, and the electrodes 37 and 38 are formed integrally with the closing part 36. The body portion 31 is bonded to the block forming the closing portion 36 by a heat-adhesive resin layer 43. At this time, it is more preferable to use acid-modified polypropylene or acid-modified polyethylene as the heat-adhesive resin layer 43 because it has high adhesiveness to the metal member forming the closed portion 36.
また、熱接着性樹脂層４３が直鎖状低密度ポリエチレン（ＬＬＤＰＥ）、低密度ポリエチレン（ＬＤＰＥ）、ポリプロピレン（ＰＰ）などの金属部材に対する接着性が低い樹脂を使用する場合には、金属接着性フィルムを介して閉塞部３６と筒状部を熱接着することができる。金属接着性フィルムとしては、例えば酸変性ポリプロピレン単層のフィルム、酸変性ポリプロピレンとポリプロピレンとの多層のフィルム等を使用することができる。
In addition, when the thermal adhesive resin layer 43 uses a resin with low adhesiveness to metal members, such as linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), or polypropylene (PP), The closing portion 36 and the cylindrical portion can be thermally bonded via the film. As the metal adhesive film, for example, a single layer film of acid-modified polypropylene, a multilayer film of acid-modified polypropylene and polypropylene, etc. can be used.
本実施形態によると第１実施形態と同様に、包装容器３０の胴部３１が折返し部５１の外面側の熱接着性樹脂層４３上に積層フィルム４０の他端部の熱接着性樹脂層４３が重ねて熱接着される。これにより、蓄電デバイス１０内部への水蒸気の浸入や蓄電部材２０の電解液の揮発を抑制することができ、蓄電デバイス１０の特性を長期保持することができる。また、蓄電デバイス１０並設時の容積効率低下を防止できるとともに、蓄電デバイス１０の製造工数を削減することができる。更に、蓄電部材２０の短絡を防止することができる。
According to this embodiment, similarly to the first embodiment, the body 31 of the packaging container 30 is placed on the thermoadhesive resin layer 43 at the other end of the laminated film 40 on the thermoadhesive resin layer 43 on the outer surface side of the folded part 51. are overlapped and thermally bonded. Thereby, it is possible to suppress the infiltration of water vapor into the interior of the power storage device 10 and the volatilization of the electrolytic solution of the power storage member 20, and the characteristics of the power storage device 10 can be maintained for a long period of time. Further, it is possible to prevent a decrease in volumetric efficiency when the power storage devices 10 are arranged side by side, and it is possible to reduce the number of manufacturing steps for the power storage devices 10. Furthermore, short circuits of the power storage member 20 can be prevented.
また、閉塞部３６が電極３７、３８と一体の金属製のブロックにより形成され、胴部３１がブロックの外面に熱接着される。これにより、胴部３１の軸方向両端部を容易に密閉することができる。
Further, the closing portion 36 is formed of a metal block integral with the electrodes 37 and 38, and the body portion 31 is thermally bonded to the outer surface of the block. Thereby, both axial ends of the body portion 31 can be easily sealed.
＜第３実施形態＞
次に、図８、図９は第３実施形態の蓄電デバイス１０の斜視図及び正面断面図を示している。説明の便宜上、前述の図１～図６に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は蓄電部材２０が正極板と負極板との間に電解質を配した蓄電素子により形成される。その他の部分は第１実施形態と同様である。 <Third embodiment>
Next, FIGS. 8 and 9 show a perspective view and a front sectional view of theelectricity storage device 10 of the third embodiment. For convenience of explanation, the same reference numerals are given to the same parts as in the first embodiment shown in FIGS. 1 to 6 described above. In this embodiment, the power storage member 20 is formed of a power storage element in which an electrolyte is arranged between a positive electrode plate and a negative electrode plate. Other parts are the same as those in the first embodiment.
次に、図８、図９は第３実施形態の蓄電デバイス１０の斜視図及び正面断面図を示している。説明の便宜上、前述の図１～図６に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は蓄電部材２０が正極板と負極板との間に電解質を配した蓄電素子により形成される。その他の部分は第１実施形態と同様である。 <Third embodiment>
Next, FIGS. 8 and 9 show a perspective view and a front sectional view of the
蓄電部材２０を構成する蓄電素子２１は正極板と負極板（いずれも不図示）とを絶縁体のセパレータ（不図示）を介して対向配置して形成される。正極板と負極板との間には電解質が配される。本実施形態では電解質が電解液から成り、包装容器３０の内部に充填される。電解質として固体電解質を用いてもよい。正極板及び負極板にはそれぞれ金属から成る電極３７、３８が接続される。
The power storage element 21 constituting the power storage member 20 is formed by arranging a positive electrode plate and a negative electrode plate (both not shown) facing each other with an insulating separator (not shown) interposed therebetween. An electrolyte is arranged between the positive electrode plate and the negative electrode plate. In this embodiment, the electrolyte consists of an electrolytic solution, and is filled inside the packaging container 30. A solid electrolyte may be used as the electrolyte. Electrodes 37 and 38 made of metal are connected to the positive electrode plate and the negative electrode plate, respectively.
包装容器３０の胴部３１は前述の図６に示す積層フィルム４０により形成される。胴部３１の軸方向両端は熱接着性樹脂層４３（図６参照）を熱接着した閉塞部３６により閉塞される。電極３７、３８は閉塞部３６の熱接着性樹脂層４３間に挟まれ、胴部３１から軸方向に突出する。
The body 31 of the packaging container 30 is formed of the laminated film 40 shown in FIG. 6 described above. Both axial ends of the body portion 31 are closed by closing portions 36 to which a heat-adhesive resin layer 43 (see FIG. 6) is thermally bonded. The electrodes 37 and 38 are sandwiched between the thermoadhesive resin layer 43 of the closing portion 36 and protrude from the body portion 31 in the axial direction.
本実施形態によると、第１実施形態と同様に、包装容器３０の胴部３１が折返し部５１（図６参照）の外面側の熱接着性樹脂層４３上に積層フィルム４０の他端部の熱接着性樹脂層４３が重ねて熱接着される。これにより、蓄電デバイス１０内部への水蒸気の浸入や蓄電部材２０の電解液の揮発を抑制することができ、蓄電デバイス１０の特性を長期保持することができる。また、蓄電デバイス１０並設時の容積効率低下を防止できるとともに、蓄電デバイス１０の製造工数を削減することができる。更に、蓄電部材２０の短絡を防止することができる。
According to this embodiment, similarly to the first embodiment, the body 31 of the packaging container 30 is placed on the thermoadhesive resin layer 43 on the outer surface side of the folded portion 51 (see FIG. 6), and the other end of the laminated film 40 is Thermal adhesive resin layers 43 are overlapped and thermally bonded. Thereby, it is possible to suppress the infiltration of water vapor into the interior of the power storage device 10 and the volatilization of the electrolytic solution of the power storage member 20, and the characteristics of the power storage device 10 can be maintained for a long period of time. Further, it is possible to prevent a decrease in volumetric efficiency when the power storage devices 10 are arranged side by side, and it is possible to reduce the number of manufacturing steps for the power storage devices 10. Furthermore, short circuits of the power storage member 20 can be prevented.
また、閉塞部３６は胴部３１の端部の熱接着性樹脂層４３を熱接着して形成され、蓄電部材２０に設けた電極３７、３８を挟む。これにより、胴部３１の軸方向両端部を容易に密閉することができる。
Further, the closing portion 36 is formed by thermally bonding the thermally adhesive resin layer 43 at the end of the body portion 31, and sandwiches the electrodes 37 and 38 provided on the power storage member 20. Thereby, both axial ends of the body portion 31 can be easily sealed.
また、蓄電部材２０が正極板と負極板との間に電解質を配した蓄電素子２１であるので、電解液を充填される蓄電素子２１から成る蓄電部材２０を封入した蓄電デバイス１０を容易に実現することができる。
Furthermore, since the power storage member 20 is a power storage element 21 in which an electrolyte is arranged between a positive electrode plate and a negative electrode plate, the power storage device 10 in which the power storage member 20 consisting of the power storage element 21 filled with an electrolytic solution is enclosed can be easily realized. can do.
第１～第３実施形態において、包装容器２０の胴部３１の断面形状を多角形、円形、楕円形等の他の形状にしてもよい。また、蓄電部材２０が、複数の蓄電素子２１を積層して直列接続し、積層方向の両端面に設けた金属タブを電極３７、３８に接続したバイポーラ型であってもよい。また、駆動モータ３に電力を供給する蓄電部材２０が二次電池から成るが、キャパシタ（電解コンデンサ、電気二重層キャパシタ、リチウムイオンキャパシタ等）であってもよい。
In the first to third embodiments, the cross-sectional shape of the body 31 of the packaging container 20 may be other shapes such as a polygon, circle, or ellipse. Alternatively, the power storage member 20 may be a bipolar type in which a plurality of power storage elements 21 are stacked and connected in series, and metal tabs provided on both end faces in the stacking direction are connected to the electrodes 37 and 38. Further, although the power storage member 20 that supplies power to the drive motor 3 is made of a secondary battery, it may be a capacitor (an electrolytic capacitor, an electric double layer capacitor, a lithium ion capacitor, etc.).
本発明によると、蓄電デバイス及び蓄電デバイスを搭載した電動自動車に広く利用可能である。
According to the present invention, it is widely applicable to power storage devices and electric vehicles equipped with power storage devices.
１ 電動自動車
２ 車輪
３ 駆動モータ
１０ 蓄電デバイス
２０ 蓄電部材
２１ 蓄電素子
２７、２８ リード端子
３０ 包装容器
３１ 胴部
３６ 閉塞部
３７、３８ 電極
４０ 積層フィルム
４１ 基材層
４２ バリア層
４３ 熱接着性樹脂層 1Electric vehicle 2 Wheels 3 Drive motor 10 Energy storage device 20 Energy storage member 21 Energy storage element 27, 28 Lead terminal 30 Packaging container 31 Body 36 Closure portion 37, 38 Electrode 40 Laminated film 41 Base layer 42 Barrier layer 43 Heat adhesive resin layer
２ 車輪
３ 駆動モータ
１０ 蓄電デバイス
２０ 蓄電部材
２１ 蓄電素子
２７、２８ リード端子
３０ 包装容器
３１ 胴部
３６ 閉塞部
３７、３８ 電極
４０ 積層フィルム
４１ 基材層
４２ バリア層
４３ 熱接着性樹脂層 1
Claims (9)
- 蓄電部材を包装容器に封入した蓄電デバイスにおいて、前記包装容器が積層フィルムの一端部を他端部に接着して筒状に形成された胴部と、前記胴部の両端を閉塞する閉塞部とを有し、前記積層フィルムが外面側から順に、基材層、バリア層、熱接着性樹脂層を積層して形成され、前記積層フィルムの一端部が外面側を厚み方向に除去された加工面を重なるように折り返した折返し部を有し、前記折返し部の外面側の前記熱接着性樹脂層上に前記積層フィルムの他端部の前記熱接着性樹脂層が重ねて熱接着されることを特徴とする蓄電デバイス。 In a power storage device in which a power storage member is enclosed in a packaging container, the packaging container includes a body formed in a cylindrical shape by bonding one end of a laminated film to the other end, and a closing part that closes both ends of the body. , the laminated film is formed by laminating a base material layer, a barrier layer, and a thermoadhesive resin layer in order from the outer surface side, and one end portion of the laminated film is removed from the outer surface side in the thickness direction. It has a folded part which is folded back so as to overlap, and the thermoadhesive resin layer at the other end of the laminated film is overlapped and thermally bonded on the thermoadhesive resin layer on the outer surface side of the folded part. Features of energy storage device.
- 前記加工面が前記バリア層よりも外面側の前記積層フィルムを除去して形成されていることを特徴とする請求項１に記載の蓄電デバイス。 The electricity storage device according to claim 1, wherein the processed surface is formed by removing the laminated film on the outer surface side of the barrier layer.
- 前記閉塞部が樹脂製のブロックにより形成されるとともに、電極が前記ブロックを貫通し、前記胴部が前記熱接着性樹脂層により前記ブロックの外面に熱接着されることを特徴とする請求項１または請求項２に記載の蓄電デバイス。 Claim 1, wherein the closing part is formed by a resin block, an electrode passes through the block, and the body part is thermally bonded to the outer surface of the block by the heat-adhesive resin layer. Or the electricity storage device according to claim 2.
- 前記閉塞部が金属製のブロックにより形成されるとともに、電極が前記ブロックと一体に形成され、前記胴部が前記熱接着性樹脂層により前記ブロックの外面に熱接着されることを特徴とする請求項１または請求項２に記載の蓄電デバイス。 A claim characterized in that the closing part is formed by a metal block, the electrode is formed integrally with the block, and the body part is thermally bonded to the outer surface of the block by the heat-adhesive resin layer. The electricity storage device according to claim 1 or claim 2.
- 前記閉塞部は前記胴部の軸方向の端部の前記熱接着性樹脂層を熱接着して形成され、前記蓄電部材に設けた電極を挟むことを特徴とする請求項１または請求項２に記載の蓄電デバイス。 According to claim 1 or 2, the closing portion is formed by thermally adhering the thermoadhesive resin layer at the axial end of the body portion, and sandwiching an electrode provided on the electricity storage member. The electricity storage device described.
- 前記蓄電部材が、正極板と負極板との間に電解質を配した蓄電素子であることを特徴とする請求項１または請求項２に記載の蓄電デバイス。 The power storage device according to claim 1 or 2, wherein the power storage member is a power storage element in which an electrolyte is arranged between a positive electrode plate and a negative electrode plate.
- 請求項１または請求項２に記載の蓄電デバイスを備えたことを特徴とする電動自動車。 An electric vehicle comprising the electricity storage device according to claim 1 or 2.
- 蓄電部材を封入する蓄電デバイス用包装容器において、積層フィルムの一端部を他端部に接着して筒状に形成された胴部と、前記胴部の両端を閉塞する閉塞部とを有し、前記積層フィルムが外面側から順に、基材層、バリア層、熱接着性樹脂層を積層して形成され、前記積層フィルムの一端部が外面側を厚み方向に除去された加工面を重なるように折り返した折返し部を有し、前記折返し部の外面側の前記熱接着性樹脂層上に前記積層フィルムの他端部の前記熱接着性樹脂層が重ねて熱接着されることを特徴とする蓄電デバイス用包装容器。 A packaging container for a power storage device that encloses a power storage member, comprising a body formed in a cylindrical shape by bonding one end of a laminated film to the other end, and a closing part that closes both ends of the body, The laminated film is formed by laminating a base material layer, a barrier layer, and a thermoadhesive resin layer in order from the outer surface side, and one end of the laminated film overlaps the processed surface from which the outer surface side has been removed in the thickness direction. A power storage device having a folded-back portion, wherein the thermo-adhesive resin layer at the other end of the laminated film is layered and thermally bonded to the thermo-adhesive resin layer on the outer surface side of the fold-back portion. Packaging containers for devices.
- 蓄電部材を封入する蓄電デバイス用包装容器の製造方法において、前記蓄電デバイス用包装容器が基材層、金属箔のバリア層、熱接着性樹脂層を積層した積層フィルムにより形成される筒状の胴部を有し、
前記積層フィルムの一端部の外面側を厚み方向に除去し、その除去された加工面を重なるように折り返して折返し部を形成する工程と、
前記折返し部の外面側の前記熱接着性樹脂層上に前記積層フィルムの他端部の前記熱接着性樹脂層を重ねて熱接着する工程と、を備えたことを特徴とする蓄電デバイス用包装容器の製造方法。 In a method for manufacturing a packaging container for an electricity storage device that encapsulates an electricity storage member, the packaging container for an electricity storage device has a cylindrical body formed of a laminated film in which a base material layer, a barrier layer of metal foil, and a heat-adhesive resin layer are laminated. has a department;
removing the outer surface side of one end of the laminated film in the thickness direction, and folding the removed processed surface so as to overlap to form a folded part;
A packaging for an electricity storage device, comprising the step of overlapping and thermally bonding the thermoadhesive resin layer at the other end of the laminated film on the thermoadhesive resin layer on the outer surface side of the folded portion. Method of manufacturing containers.
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| JP2022-110357 | 2022-07-08 | ||
| JP2022110357A JP7276573B1 (en) | 2022-07-08 | 2022-07-08 | Electrical storage device, electric vehicle, packaging container for electrical storage device, and manufacturing method thereof |
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| JP2024008461A (en) | 2024-01-19 |
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