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WO2018235398A1 - Dispositif de stockage d'électricité - Google Patents

Dispositif de stockage d'électricité Download PDF

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Publication number
WO2018235398A1
WO2018235398A1 PCT/JP2018/015091 JP2018015091W WO2018235398A1 WO 2018235398 A1 WO2018235398 A1 WO 2018235398A1 JP 2018015091 W JP2018015091 W JP 2018015091W WO 2018235398 A1 WO2018235398 A1 WO 2018235398A1
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WIPO (PCT)
Prior art keywords
layer
face
adhesion
active material
exposed
Prior art date
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Ceased
Application number
PCT/JP2018/015091
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English (en)
Japanese (ja)
Inventor
広貴 堀口
将之 神頭
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Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Filing date
Publication date
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Publication of WO2018235398A1 publication Critical patent/WO2018235398A1/fr
Anticipated expiration legal-status Critical
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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
    • H01M50/50—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
    • 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
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H01G11/12—Stacked hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/66—Current collectors
    • H01G11/72—Current collectors specially adapted for integration in multiple or stacked hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H01G11/76—Terminals, e.g. extensions of current collectors specially adapted for integration in multiple or stacked hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • 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
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • 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
    • H01M50/572—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
    • H01M50/593—Spacers; Insulating plates
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a power storage device.
  • Patent Document 1 describes an example of a storage device.
  • the main object of the present invention is to provide an electricity storage device having high connection reliability between an internal electrode and an external electrode.
  • An electricity storage device includes a device body, a first external electrode, and a second external electrode.
  • the device body has first and second major surfaces, first and second side surfaces, and first and second end surfaces.
  • the first and second major surfaces extend in the longitudinal direction and the width direction.
  • the first and second side surfaces extend in the longitudinal direction and the thickness direction.
  • the first and second end surfaces extend in the width direction and the thickness direction.
  • the first external electrode is provided on the device body.
  • the second external electrode is provided on the device body.
  • the device body has a first internal electrode, a second internal electrode, an electrolyte layer, and an insulating layer.
  • the first inner electrode extends along the length direction and the width direction.
  • the first inner electrode has a first current collector and a first active material layer.
  • the first current collector is exposed at the first end face.
  • the first active material layer is provided on the first current collector.
  • the second inner electrode is stacked in the thickness direction with respect to the first inner electrode.
  • the second inner electrode has a second current collector and a second active material layer.
  • the second current collector is exposed at the second end face.
  • the second active material layer is provided on the second current collector.
  • the electrolyte layer is disposed between the first active material layer and the second active material layer.
  • the insulating layer separates the first current collector and the electrolyte layer from the second end face.
  • the insulating layer separates the second current collector and the electrolyte layer from the first end face.
  • the insulating layer is provided to surround the electrolyte layer.
  • the first external electrode has a first sprayed film provided on the first end face.
  • the second external electrode has a second sprayed film provided on the second end face.
  • the device body further includes a first adhesion layer and a second adhesion layer.
  • the first adhesion layer has higher adhesion to the first sprayed film than the insulating layer.
  • the first adhesion layer is exposed at the first end face.
  • the second adhesion layer has higher adhesion to the second sprayed film than the insulating layer.
  • the second adhesion layer is exposed at the second end face.
  • a first recess extending inward in the longitudinal direction is provided on the surface exposed to the first end face of the first adhesive layer.
  • a second recess extending inward in the longitudinal direction is provided on the surface exposed to the second end face of the second adhesive layer.
  • the first sprayed film is in the first recess.
  • the second sprayed film is in the second recess.
  • the first adhesion layer having higher adhesion to the first sprayed film than the insulating layer is provided. Therefore, the adhesion strength between the first sprayed film and the device body is higher than in the case where the first adhesion layer is not provided.
  • the first adhesive layer is provided with a first recess extending inward in the longitudinal direction from the end face of the first adhesive layer. The first sprayed film is intruding into the first recess. Therefore, the bonding area between the first adhesion layer and the first sprayed film is large. Thus, the adhesion between the device body and the first sprayed film is further enhanced. Therefore, the first sprayed film is less likely to peel off from the device body. For this reason, it is difficult for the first sprayed film to be peeled off from the first internal electrode. Therefore, in the electricity storage device according to the present invention, the connection reliability between the first outer electrode and the first inner electrode is high.
  • a second adhesion layer having higher adhesion to the second sprayed film than the insulating layer is provided. For this reason, the adhesion strength between the second sprayed film and the device body is higher than when the second adhesion layer is not provided.
  • the second adhesive layer is provided with a second recess extending inward in the length direction from the end face of the second adhesive layer. The second sprayed film is intruding into the second recess. Therefore, the bonding area between the second adhesion layer and the second sprayed film is large. Thus, the adhesion between the device body and the second sprayed film is further enhanced.
  • the second sprayed film is less likely to be peeled off from the device body. Therefore, the second sprayed film is less likely to be peeled off from the second internal electrode. Therefore, in the electricity storage device according to the present invention, the connection reliability between the second outer electrode and the second inner electrode is high.
  • the connection reliability of an external electrode and an internal electrode is high.
  • the first adhesion layer is provided on the first current collector, and the first recess is a first end face side in the length direction of the first current collector.
  • the end portion is provided so as to be exposed from the first adhesion layer
  • the second adhesion layer is provided on the second current collector
  • the second recess is provided for the second current collector. It is preferable that a second end face side end in the longitudinal direction be provided so as to be exposed from the second adhesion layer.
  • the first adhesion layer includes the portion located at the same position as the first active material layer in the thickness direction, and the first adhesion layer and the first active material layer Are made of the same material
  • the second adhesion layer includes a portion located at the same position as the second active material layer in the thickness direction, and the second adhesion layer and the second active layer It is preferable that the material layer and the material layer be made of the same material.
  • the device body has higher adhesion to the first sprayed film than the insulating layer, and the third adhesive layer exposed at the first end face and the third adhesion layer It may have high adhesion to the thermal spray coating of No. 2 and further have a fourth adhesion layer exposed at the second end face.
  • a third recess extending inward in the longitudinal direction is provided on the surface exposed to the first end face of the third adhesive layer, and exposed to the second end surface of the fourth adhesive layer.
  • the fourth concave portion extending inward in the length direction is provided in the surface where the third thermal spray coating is in the third concave, and the fourth thermal spray coating is in the fourth concave.
  • the third adhesion layer includes a portion located at the same position as the second active material layer in the thickness direction, and the third adhesion layer and the second active material layer are the same. It is made of a material, and the fourth adhesion layer includes a portion located at the same position as the first active material layer in the thickness direction, and the fourth adhesion layer and the first active material layer Are preferably made of the same material.
  • each of the adhesion layers is preferably a porous layer.
  • each of the adhesion layers preferably contains at least one particle selected from the group consisting of carbon particles, carbon compound particles, metal particles and metal oxide particles.
  • each of the first and second current collectors is preferably made of a metal foil.
  • the insulating layer is preferably exposed to the first and second end faces.
  • FIG. 1 is a schematic perspective view of a power storage device according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG.
  • FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG.
  • FIG. 4 is a schematic cross-sectional view taken along line IV-IV of FIG.
  • FIG. 1 is a schematic perspective view of a power storage device according to the present embodiment.
  • FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG.
  • FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG.
  • the power storage device 1 shown in FIGS. 1 to 3 is, for example, a device that constitutes an electric double layer capacitor or a secondary battery.
  • the storage device 1 includes a device body 10.
  • the device body 10 is provided in a rectangular shape.
  • the device body 10 has first and second main surfaces 10a1 and 10b1, first and second side surfaces 10c1 and 10d1 (see FIG. 3), and first and second end surfaces 10e1 and 10f1 (FIG. 2). See)).
  • the first and second major surfaces 10a1 and 10b1 extend along the length direction L and the width direction W.
  • the first major surface 10a1 and the second major surface 10b1 are opposed in the thickness direction T.
  • the first and second side surfaces 10 c 1 and 10 d 1 extend along the length direction L and the thickness direction T.
  • the first side surface 10c1 and the second side surface 10d1 face each other in the width direction W.
  • the first and second end faces 10 e 1 and 10 f 1 extend in the width direction W and the thickness direction T.
  • the first end face 10e1 and the second end face 10f1 are opposed in the length direction L.
  • the device body 10 includes a functional unit 10A and an exterior body 10B.
  • the functional unit 10A is a portion at least a part of which exhibits a function as a power storage device.
  • the functional unit 10A is provided in a rectangular shape.
  • the functional unit 10A has first and second main surfaces 10a2 and 10b2, first and second side surfaces 10c2 and 10d2 (see FIG. 3), and first and second end surfaces 10e2 and 10f2 (FIG. 2). See)).
  • the first and second major surfaces 10a2 and 10b2 extend along the length direction L and the width direction W.
  • the first major surface 10a2 and the second major surface 10b2 face each other in the thickness direction T.
  • the first and second side surfaces 10 c 2 and 10 d 2 extend along the length direction L and the thickness direction T.
  • the first side surface 10c2 and the second side surface 10d2 face each other in the width direction W.
  • the first and second end faces 10 e 2 and 10 f 2 extend in the width direction W and the thickness direction T.
  • the first end face 10e2 and the second end face 10f2 face each other in the length direction L.
  • the first end face 10e2 of the functional unit 10A constitutes a part excluding the part of the first end face 10e1 of the device body 10, specifically, the part formed of the exterior body 10B.
  • the second end face 10f2 of the functional unit 10A constitutes a part of the second end face 10f1 of the device body 10, specifically, a part excluding the part formed by the exterior body 10B.
  • the “cuboid shape” includes a rectangular shape having a chamfered shape or a rounded shape at a corner portion or a ridge portion.
  • the functional unit 10 ⁇ / b> A includes a first inner electrode 11, a second inner electrode 12, and an electrolyte layer 13.
  • the first inner electrode 11 extends along the length direction L and the width direction W.
  • the first inner electrode 11 is provided in parallel to the first and second main surfaces 10a2 and 10b2 of the functional unit 10A.
  • the first inner electrode 11 has a first current collector 11a and a first active material layer 11b.
  • the first current collector 11a is drawn out to the first end faces 10e1 and 10e2.
  • the first current collector 11a is exposed at the first end faces 10e1 and 10e2.
  • the first current collector 11a is not drawn out to the first and second side faces 10c2 and 10d2 and the second end faces 10f1 and 10f2.
  • the first current collector 11a can be made of, for example, a metal foil made of at least one metal such as aluminum and copper.
  • metal includes alloys.
  • a first active material layer 11 b is provided on the surface on one side of the first current collector 11 a.
  • the first active material layer 11 b contains an active material.
  • the first active material layer 11 b constitutes a polarizable electrode.
  • the first active material layer 11b as the polarizable electrode contains, for example, a carbon material such as activated carbon as an active material.
  • the second inner electrode 12 extends along the length direction L and the width direction W.
  • the second inner electrode 12 is provided in parallel to the first and second main surfaces 10a2 and 10b2 of the functional unit 10A.
  • the second inner electrode 12 includes a second current collector 12a and a second active material layer 12b.
  • the second current collector 12a is drawn to the second end faces 10f1 and 10f2, and exposed to the second end faces 10f1 and 10f2.
  • the second current collector 12a is not drawn out to the first and second side faces 10c2 and 10d2 and the first end face 10e1 and 10e2.
  • the second inner electrode 12 is stacked in the thickness direction T with respect to the first inner electrode 11.
  • the portion excluding the second end face 10 f 1, 10 f 2 side end portion is the portion of the first current collector 11 a of the first inner electrode 11, It faces in the thickness direction T a portion excluding the first end face 10e1 and 10e2 side end.
  • the second current collector 12a can be made of, for example, a metal foil made of at least one metal such as aluminum and copper.
  • the second active material layer 12 b is provided on the surface of the second current collector 12 a on the first inner electrode 11 side. Therefore, the second active material layer 12 b is opposed to the first active material layer 11 b in the thickness direction T.
  • the second active material layer 12 b contains an active material.
  • the second active material layer 12 b constitutes a polarizable electrode.
  • the second active material layer 12 b as the polarizable electrode contains, for example, a carbon material such as activated carbon as an active material.
  • An electrolyte layer 13 is provided between the first active material layer 11 b of the first inner electrode 11 and the second active material layer 12 b of the second inner electrode 12.
  • the electrolyte layer 13 is a layer containing an electrolyte.
  • the electrolyte layer 13 may be constituted by a gel electrolyte which is a gel electrolyte, or may be constituted by a porous body such as a separator impregnated with an electrolytic solution.
  • a gel electrolyte high molecular polyethylene oxide containing an electrolyte etc. are mentioned, for example.
  • electrolyte examples include, for example, ionic liquids such as EMITFSI (1-ethyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide), EMIBF4 (1-ethyl-3-methylimidazolium borofluoride), or And those obtained by dissolving the ionic liquid in an organic solvent such as propylene carbonate and acetonitrile. Only one of these electrolytes may be used, or a plurality of types may be mixed and used.
  • ionic liquids such as EMITFSI (1-ethyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide), EMIBF4 (1-ethyl-3-methylimidazolium borofluoride), or And those obtained by dissolving the ionic liquid in an organic solvent such as propylene carbonate and acetonitrile. Only one of these electrolytes may be used, or a plurality of types may be
  • the electrolyte layer 13 has a first electrolyte layer 13a and a second electrolyte layer 13b.
  • the first electrolyte layer 13a is provided on the first active material layer 11b.
  • the second electrolyte layer 13 b is provided on the second active material layer 12 b.
  • the first electrolyte layer 13a and the second electrolyte layer 13b are in contact with each other so that the electrolytes can move relative to each other. It is preferable that the first electrolyte layer 13a and the second electrolyte layer 13b be in close contact with each other.
  • first current collector 11a of the first inner electrode 11 is exposed to the first end face 10e2 (see FIG. 2).
  • the second current collector 12 a is exposed to the second end face 10 f 2.
  • the first active material layer 11b of the first inner electrode 11, the second active material layer 12b of the second inner electrode 12, and the electrolyte layer 13 are not exposed to the first and second end faces 10e2 and 10f2. .
  • An insulating layer 15 is provided between the first and second active material layers 11 b and 12 b and the electrolyte layer 13 and the first end faces 10 e 1 and 10 e 2. Specifically, as shown in FIG. 4, the insulating layer 15 separates the first current collector 11a and the electrolyte layer 13 from the second end faces 10f1 and 10f2, and the second current collector 12a. And the electrolyte layer 13 is provided so as to separate the electrolyte layer 13 from the first end faces 10e1 and 10e2.
  • the insulating layer 15 has a first insulating layer 15 a and a second insulating layer 15 b.
  • the first active material layer 11 b and the first electrolyte layer 13 a are separated from the first end faces 10 e 1 and 10 e 2 by the first insulating layer 15 a.
  • the second active material layer 12 b and the second electrolyte layer 13 b are separated from the second end faces 10 f 1 and 10 f 2 by the second insulating layer 15 b.
  • the first active material layer 11b and the first electrolyte layer 13a are separated from the first and second side surfaces 10d by the first insulating layer 15a. That is, the first insulating layer 15a includes the first and second end faces 10e1, 10e2, 10f1, and 10f2 of the first active material layer 11b and the first electrolyte layer 13a, and the first and second side surfaces 10c, It is provided to cover the 10d side.
  • the second insulating layer 15b isolates the second active material layer 11b and the second electrolyte layer 13b from the first and second side surfaces 10c and 10d. That is, the second insulating layer 15b covers the first and second end faces 10e and 10f of the second active material layer 11b and the second electrolyte layer 13b and the first and second side surfaces 10c and 10d. It is provided as.
  • the insulating layer 15 can be made of, for example, a urethane resin, an acrylic resin, an epoxy resin, a polyimide resin, a silicone resin, or the like.
  • the power storage device 1 has first and second adhesion layers 14 a and 14 b.
  • the storage device 1 further includes third and fourth adhesion layers 14c and 14d.
  • the electricity storage device may include only the first and second adhesion layers, and may not include the third and fourth adhesion layers.
  • the first adhesion layer 14a is provided on the first current collector 11a. Specifically, the first adhesion layer 14a is provided on the outer side in the length direction L of the first insulating layer 15a. The first adhesion layer 14 a has a portion provided at the same position as the first active material layer 11 b in the stacking direction T. The first adhesion layer 14a is exposed at the first end faces 10e1 and 10e2.
  • the second adhesion layer 14 b is provided on the second current collector 12 a. Specifically, the second adhesion layer 14 b is provided outside in the length direction L of the first insulating layer 15 a. The second adhesion layer 14 b has a portion provided at the same position as the second active material layer 12 b in the stacking direction T. The second adhesion layer 14 b is exposed at the second end faces 10 f 1 and 10 f 2.
  • the third adhesion layer 14c is provided on the outer side in the length direction L of the second insulating layer 15b.
  • the third adhesion layer 14 c has a portion provided in the same position as the second active material layer 12 b in the stacking direction T.
  • the third adhesion layer 14c is exposed at the first end faces 10e1 and 10e2.
  • the fourth adhesive layer 14d is provided on the outer side in the length direction L of the second insulating layer 15b.
  • the fourth adhesive layer 14 d has a portion provided at the same position as the second active material layer 12 b in the stacking direction T.
  • the fourth adhesion layer 14d is exposed at the second end faces 10f1 and 10f2.
  • the first and third adhesion layers 14a and 14c can be made of, for example, the same material as the first active material layer 11b.
  • first and third adhesion layers 14a and 14c are made of the same material as the first active material layer 11b, the first and third adhesion layers 14a and 14c, and the first active material layer 11b and Can be configured in the same step.
  • the second and fourth adhesion layers 14b and 14d can be made of, for example, the same material as the second active material layer 12b.
  • the second and fourth adhesion layers 14b and 14d are made of the same material as the second active material layer 12b, the second and fourth adhesion layers 14b and 14d, and the second active material layer 12b and Can be formed in the same step.
  • the pair of first and second internal electrodes 11 and 12, the electrolyte layer 13, the insulating layer 15, and the first to fourth adhesion layers 14a to 14d constitute one electricity storage unit 17. doing.
  • a plurality of storage units 17 are stacked, and the stack of the plurality of storage units 17 constitutes the functional unit 10A.
  • the storage units 17 adjacent in the stacking direction T are bonded by the adhesive layer 16. Further, the storage units 17 located in the uppermost layer and the lowermost layer in the stacking direction T are bonded to the inner surface of the exterior body 10B by the adhesive layer 16.
  • the present invention is not limited to the above configuration.
  • the power storage device according to the present invention may have only one power storage unit.
  • the storage unit may be formed of a laminate of a plurality of pairs of first and second internal electrodes 11 and 12 sandwiching the electrolyte layer.
  • An exterior body 10B is provided outside the functional unit 10A.
  • the exterior body 10B has a function of suppressing the intrusion of water or the like into the functional unit 10A, and a function of suppressing the leakage of the electrolytic solution from the functional unit 10A.
  • the exterior body 10B can be made of, for example, an epoxy resin such as a naphthalene epoxy resin, a liquid crystal polymer, or the like.
  • the exterior body 10B is provided to cover the first and second main surfaces 10a2 and 10b2 and the first and second side surfaces 10c2 and 10d2 of the functional unit 10A.
  • the first and second end faces 10e2 and 10f2 of the functional unit 10A are exposed from the exterior body 10B.
  • a first external electrode 18 is provided on the device body 10. Specifically, the first outer electrode 18 is provided on the first end faces 10 e 1 and 10 e 2 and is electrically connected to the first inner electrode 11.
  • the first external electrode 18 has a first sprayed film 18a, a first conductive adhesive layer 18b, and a first metal cap 18c.
  • a first sprayed film 18a is provided on the first end faces 10e1 and 10e2. Substantially the entire first end faces 10e1 and 10e2 are covered with the first sprayed film 18a.
  • the first metal cap 18 c covers a portion on the first end face 10 e 1 side of the device body 10. Specifically, the first metal cap 18c has a first end face 10e1 and a first end face 10e1 of each of the first and second main faces 10a1 and 10b1 and the first and second side faces 10c1 and 10d1. Cover the side part.
  • a first conductive adhesive layer 18 b is provided between the first metal cap 18 c and the first sprayed film 18 a.
  • the first metal cap 18c and the first sprayed film 18a are electrically connected and bonded together by the first conductive adhesive layer 18b.
  • a second external electrode 19 is provided on the device body 10. Specifically, the second outer electrode 19 is provided on the second end face 10 f 1, 10 f 2 and is electrically connected to the first inner electrode 11. The exposed portion from the exterior body 10B of the functional portion 10A is covered by the second external electrode 19 and the first external electrode 18.
  • the second external electrode 19 has a second sprayed film 19a, a second conductive adhesive layer 19b, and a second metal cap 19c.
  • a second sprayed film 19a is provided on the second end faces 10f1 and 10f2. Substantially the entire second end faces 10f1 and 10f2 are covered with the second sprayed film 19a.
  • the second metal cap 19 c covers a portion on the second end face 10 f 1 side of the device body 10.
  • the second metal cap 19c has a second end face 10f1 and first and second main faces 10a1 and 10b1 and respective second end faces 10f1 of the first and second side faces 10c1 and 10d1. Cover the side part.
  • a second conductive adhesive layer 19b is provided between the second metal cap 19c and the second sprayed film 19a.
  • the second metal cap 19c and the second sprayed film 19a are electrically connected and bonded together by the second conductive adhesive layer 19b.
  • the first and second sprayed films 18a and 19a can be made of, for example, a metal foil made of at least one metal selected from the group consisting of Al, Cu, and Al-Si.
  • the first and second metal caps 18c and 19c are, for example, a base material containing an alloy (Fe-42Ni alloy), a base material made of aluminum or an aluminum alloy, a base material made of copper or a copper alloy, It can be constituted by Ni / Ag plating covering the outer surface of the material or Ni / Au plating.
  • a base material containing an alloy Fe-42Ni alloy
  • a base material made of aluminum or an aluminum alloy a base material made of copper or a copper alloy
  • It can be constituted by Ni / Ag plating covering the outer surface of the material or Ni / Au plating.
  • the contact area between the adhesion layer and the thermal spray film is small. Therefore, the adhesion between the device body and the sprayed film is low. Thus, the sprayed film is likely to be peeled off from the device body.
  • the sprayed film separates from the device body, the sprayed film separates from the internal electrode. Therefore, there is a possibility that the connection reliability between the external electrode and the internal electrode may be lowered.
  • the first adhesion layer 14 a having higher adhesion to the first sprayed film 18 a than the first insulating layer 15 a is provided. Therefore, the adhesion between the first sprayed film 18a and the device body 10 is enhanced. Furthermore, the first adhesive layer 14a is provided with a first recess 14a1 extending inward in the length direction L from the end face of the first adhesive layer 14a. The first sprayed film 18a is intruding into the first recess 14a1. For this reason, the bonding area between the first adhesion layer 14a and the first sprayed film 18a is large. Thus, the adhesion between the device body 10 and the first sprayed film 18a is further enhanced.
  • the first sprayed film 18 a is difficult to peel off from the device body 10. Therefore, the first sprayed film 18 a is less likely to be peeled off from the first inner electrode 11. Therefore, in the storage device 1, the connection reliability between the first outer electrode 18 and the first inner electrode 11 is high.
  • a second adhesion layer 14 b having higher adhesion to the second sprayed film 19 a than the first insulating layer 15 a is provided in the storage device 1. Therefore, the adhesion between the second sprayed film 19a and the device body 10 is enhanced. Further, the second adhesion layer 14b is provided with a second recess 14b1 extending inward in the length direction L from the end face of the second adhesion layer 14b. The second sprayed film 19a is intruding into the second recess 14b1. For this reason, the bonding area between the second adhesion layer 14b and the second sprayed film 19a is large. Thus, the adhesion between the device body 10 and the second sprayed film 19a is further enhanced.
  • the second sprayed film 19 a is less likely to be peeled off from the device body 10. Therefore, the second sprayed film 19 a is less likely to be peeled off from the second inner electrode 12. Therefore, in the storage device 1, the connection reliability between the second outer electrode 19 and the second inner electrode 12 is high.
  • the first adhesion layer 14a is provided on the first current collector 11a, and the first recess 14a1 is a first in the length direction L of the first current collector 11a.
  • the end face side end portion is provided to be exposed from the first adhesion layer 14a.
  • the bonding area between the first sprayed film 18 a and the first current collector 11 a is large.
  • the first sprayed film 18 a is less likely to be peeled off from the first inner electrode. Therefore, the connection reliability between the first outer electrode 18 and the first inner electrode 11 can be further enhanced.
  • the second adhesion layer 14b is provided on the second current collector 12a, and the second recess 14b1 is in the length direction L of the second current collector 12a.
  • the first end face side end portion is provided so as to be exposed from the second adhesion layer 14b.
  • the bonding area between the second sprayed film 19a and the second current collector 12a is large.
  • the second sprayed film 19 a is less likely to be peeled off from the second inner electrode 12. Therefore, the connection reliability between the second outer electrode 19 and the second inner electrode 12 can be further enhanced.
  • a third adhesion layer 14 c having a higher adhesion to the first sprayed film 18 a than the second insulating layer 15 b is further provided.
  • the third adhesive layer 14c is provided with a third recess 14c1 extending inward in the length direction from the end face of the third adhesive layer 14c.
  • the first sprayed film 18a is intruding into the third recess 14c1.
  • the bonding area between the third adhesion layer 14c and the first sprayed film 18a is large.
  • the adhesion between the device body 10 and the first sprayed film 18a is further enhanced. Therefore, the first sprayed film 18 a is more difficult to peel off from the device body 10. Therefore, the first sprayed film 18 a is more difficult to peel off from the first inner electrode 11. Therefore, in the storage device 1, the connection reliability between the first outer electrode 18 and the first inner electrode 11 is further high.
  • a fourth adhesion layer 14 d having a higher adhesion to the second sprayed film 19 a than the second insulating layer 15 b is further provided.
  • the fourth adhesive layer 14d is provided with a fourth recess 14d1 extending inward in the length direction from the end face of the fourth adhesive layer 14d.
  • the second sprayed film 19a is intruding into the fourth recess 14d1. Therefore, the bonding area between the fourth adhesion layer 14d and the second sprayed film 19a is large.
  • the adhesion between the device body 10 and the second sprayed film 19a is further enhanced. Therefore, the second sprayed film 19 a is more difficult to peel off from the device body 10. For this reason, the second sprayed film 19 a is further less likely to be peeled off from the second inner electrode 12. Therefore, in the storage device 1, the connection reliability between the second outer electrode 19 and the second inner electrode 12 is further high.
  • each of the first to fourth adhesion layers 14a, 14b, 14c and 14d is a porous layer Is preferred.
  • the surface area of each of the first to fourth adhesion layers 14a, 14b, 14c, and 14d is increased, and the area of the portion exhibiting the anchor effect is increased.
  • each of the first to fourth adhesion layers 14a, 14b, 14c and 14d is at least one selected from the group consisting of carbon particles, carbon compound particles, metal particles and metal oxide particles. It is preferred to include particles. In this case, the physical adsorption force or the chemical adsorption force between each of the first to fourth adhesion layers 14a, 14b, 14c, 14d and the first or second sprayed film 18a, 19a is increased.
  • each of the first and second current collectors 11a and 12a be formed of a metal foil.
  • Each of the first and second current collectors 11a and 12a is formed of a metal foil, thereby enhancing the bonding strength between the first and second current collectors 11a and 12a and the thermal spray films 18a and 19a. It is because you can.
  • the concave portions 14 a 1, 14 b 1, 14 c 1, 14 d 1 can be formed, for example, by physical etching such as plasma treatment or blast, or chemical etching using an etching agent.
  • the end faces thereof are subjected to etching treatment such as plasma treatment, and the first to fourth adhesion layers 14a, 14b,
  • the first to fourth recesses 14a1, 14b1, 14c1 and 14d1 can be configured by removing a part of 14c and 14d.

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  • 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)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

L'invention concerne un dispositif de stockage d'électricité qui présente une haute fiabilité de connexion entre une électrode interne et une électrode externe. Selon la présente invention, un corps principal de dispositif 10 comprend une première couche d'adhérence 14a et une seconde couche d'adhérence 14b. La première couche d'adhérence 14a présente une adhérence plus élevée à un premier film de pulvérisation thermique qu'à une couche isolante 15. La seconde couche d'adhérence 14b présente une adhérence supérieure à un second film de pulvérisation thermique 19a par rapport à la couche isolante 15. Une surface de la première couche d'adhérence 14a exposée au niveau d'une première face d'extrémité 10f1 est pourvue d'un premier évidement 14a1 qui s'étend vers l'intérieur dans la direction de la longueur L. Une surface de la seconde couche d'adhérence 14b exposée au niveau d'une seconde face d'extrémité 10f1 est pourvue d'un second évidement 14b1 qui s'étend vers l'intérieur dans la direction de la longueur L. Le premier film de pulvérisation thermique 18a a pénétré dans le premier évidement 14a1. Le second film de pulvérisation thermique 19a a pénétré dans le second évidement 14b1.
PCT/JP2018/015091 2017-06-19 2018-04-10 Dispositif de stockage d'électricité Ceased WO2018235398A1 (fr)

Applications Claiming Priority (2)

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JP2017119506 2017-06-19
JP2017-119506 2017-06-19

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020195381A1 (fr) * 2019-03-27 2020-10-01 株式会社村田製作所 Batterie à semi-conducteur
JPWO2021070927A1 (fr) * 2019-10-11 2021-04-15
WO2021124809A1 (fr) * 2019-12-19 2021-06-24 株式会社村田製作所 Batterie à semi-conducteurs
WO2021125337A1 (fr) * 2019-12-19 2021-06-24 株式会社村田製作所 Batterie à semi-conducteur
DE102021211861A1 (de) 2021-10-21 2023-04-27 Volkswagen Aktiengesellschaft Ableiterfahnenlose Batteriezelle, Fahrzeug und Verfahren zur Herstellung einer Batteriezelle
US12368184B2 (en) 2019-10-11 2025-07-22 Murata Manufacturing Co., Ltd. Solid state battery

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005019311A (ja) * 2003-06-27 2005-01-20 Matsushita Electric Ind Co Ltd 電気化学素子
WO2013001908A1 (fr) * 2011-06-28 2013-01-03 株式会社村田製作所 Élément de dispositif de stockage de courant et dispositif de stockage de courant
WO2016121416A1 (fr) * 2015-01-30 2016-08-04 株式会社村田製作所 Dispositif de stockage d'énergie

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005019311A (ja) * 2003-06-27 2005-01-20 Matsushita Electric Ind Co Ltd 電気化学素子
WO2013001908A1 (fr) * 2011-06-28 2013-01-03 株式会社村田製作所 Élément de dispositif de stockage de courant et dispositif de stockage de courant
WO2016121416A1 (fr) * 2015-01-30 2016-08-04 株式会社村田製作所 Dispositif de stockage d'énergie

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* Cited by examiner, † Cited by third party
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CN113632286B (zh) * 2019-03-27 2024-10-25 株式会社村田制作所 固体电池
US12444772B2 (en) 2019-03-27 2025-10-14 Murata Manufacturing Co., Ltd. Solid-state battery
CN113632286A (zh) * 2019-03-27 2021-11-09 株式会社村田制作所 固体电池
JPWO2020195381A1 (ja) * 2019-03-27 2021-12-23 株式会社村田製作所 固体電池
JP7484999B2 (ja) 2019-03-27 2024-05-16 株式会社村田製作所 固体電池
WO2020195381A1 (fr) * 2019-03-27 2020-10-01 株式会社村田製作所 Batterie à semi-conducteur
JP7188562B2 (ja) 2019-03-27 2022-12-13 株式会社村田製作所 固体電池
JP2023022219A (ja) * 2019-03-27 2023-02-14 株式会社村田製作所 固体電池
JPWO2021070927A1 (fr) * 2019-10-11 2021-04-15
WO2021070927A1 (fr) * 2019-10-11 2021-04-15 株式会社村田製作所 Batterie à semi-conducteur
US12368184B2 (en) 2019-10-11 2025-07-22 Murata Manufacturing Co., Ltd. Solid state battery
US12283699B2 (en) 2019-10-11 2025-04-22 Murata Manufacturing Co., Ltd. Solid state battery
JP7259980B2 (ja) 2019-10-11 2023-04-18 株式会社村田製作所 固体電池
CN114846670A (zh) * 2019-12-19 2022-08-02 株式会社村田制作所 固体电池
JP7375832B2 (ja) 2019-12-19 2023-11-08 株式会社村田製作所 固体電池
JP7405151B2 (ja) 2019-12-19 2023-12-26 株式会社村田製作所 固体電池
CN114830399A (zh) * 2019-12-19 2022-07-29 株式会社村田制作所 固体电池
JPWO2021125337A1 (fr) * 2019-12-19 2021-06-24
JPWO2021124809A1 (fr) * 2019-12-19 2021-06-24
WO2021125337A1 (fr) * 2019-12-19 2021-06-24 株式会社村田製作所 Batterie à semi-conducteur
WO2021124809A1 (fr) * 2019-12-19 2021-06-24 株式会社村田製作所 Batterie à semi-conducteurs
DE102021211861A1 (de) 2021-10-21 2023-04-27 Volkswagen Aktiengesellschaft Ableiterfahnenlose Batteriezelle, Fahrzeug und Verfahren zur Herstellung einer Batteriezelle

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