WO2019230484A1 - Secondary battery, laminate battery, and manufacturing method - Google Patents

Secondary battery, laminate battery, and manufacturing method Download PDF

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Publication number
WO2019230484A1
WO2019230484A1 PCT/JP2019/019996 JP2019019996W WO2019230484A1 WO 2019230484 A1 WO2019230484 A1 WO 2019230484A1 JP 2019019996 W JP2019019996 W JP 2019019996W WO 2019230484 A1 WO2019230484 A1 WO 2019230484A1
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WIPO (PCT)
Prior art keywords
battery
sheet
electrode
conductive adhesive
conductive
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PCT/JP2019/019996
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French (fr)
Japanese (ja)
Inventor
秀憲 安藤
佳亮 溝江
伸明 高木
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株式会社日本マイクロニクス
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Publication of WO2019230484A1 publication Critical patent/WO2019230484A1/en

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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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • 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 technique for thinning a secondary battery in which a plurality of sheet batteries are stacked.
  • Patent Document 1 discloses a stacked battery in which a plurality of sheet batteries are stacked.
  • two sheet batteries are arranged so that the second electrodes face each other.
  • the sheet battery has a tab portion.
  • a tab lead is connected to the tab portion.
  • the present invention has been made in view of the above-described problems, and an object thereof is to provide a technique for thinning a secondary battery in which a plurality of sheet batteries are stacked.
  • a secondary battery includes a first sheet-like battery having a first electrode and a second electrode, a first electrode, and a second electrode, such that the second electrodes face each other.
  • a second sheet-shaped battery disposed opposite to the first sheet-shaped battery, and an extraction electrode disposed between the second electrode of the first sheet-shaped battery and the second electrode of the second sheet-shaped battery.
  • a first conductive adhesive that connects the second electrode and the extraction electrode of the first sheet battery, and a second that connects the second electrode and the extraction electrode of the second sheet battery.
  • a plurality of first conductive adhesives are disposed between the extraction electrode and the second electrode of the first sheet-shaped battery, and the extraction electrode and the first sheet-shaped
  • a plurality of second conductive adhesives are disposed between the second electrodes of the battery, and in a plan view in a state where the first sheet-shaped battery and the second sheet-shaped battery are disposed to face each other, It is preferable that the first conductive adhesive and the second conductive adhesive are alternately arranged.
  • the first conductive adhesive and the second conductive adhesive are alternately arranged along the longitudinal direction of the extraction electrode.
  • the first sheet-shaped battery and the second sheet-shaped battery have a tab portion, and the plane in a state where the first sheet-shaped battery and the second sheet-shaped battery are arranged to face each other.
  • the tab portion of the first sheet battery and the tab portion of the second sheet battery overlap, and the tab portion of the first sheet battery and the second sheet battery are tab portions.
  • the first electrodes are arranged so as to face each other.
  • the laminated battery according to the present embodiment includes the above-described secondary battery as a sheet-like battery pair, and includes a plurality of the sheet-like battery pairs so that the first electrodes of two adjacent sheet-like battery pairs face each other.
  • a plurality of the sheet-like battery pairs are stacked, and the first sheet-like battery and the second sheet-like battery are arranged to face each other when viewed in a plan view.
  • the first conductive adhesive and the second conductive adhesive thus formed are shifted from each other.
  • the manufacturing method of the secondary battery which concerns on 1 aspect of this embodiment is a process of apply
  • a plurality of first conductive adhesives are disposed between the extraction electrode and the second electrode of the first sheet-like battery, and the extraction electrode and the first electrode
  • a plurality of second conductive adhesives are arranged between the second electrodes of one sheet-like battery, and the plane in a state where the first sheet-like battery and the second sheet-like battery are arranged to face each other.
  • the first conductive adhesive and the second conductive adhesive are alternately arranged.
  • the first conductive adhesive and the second conductive adhesive are alternately arranged along the longitudinal direction of the extraction electrode.
  • the first sheet-shaped battery and the second sheet-shaped battery have a tab portion, and the first sheet-shaped battery and the second sheet-shaped battery are arranged to face each other.
  • the tab portion of the first sheet battery and the tab portion of the second sheet battery overlap, and the tab portion of the first sheet battery and the second sheet battery are tabs.
  • the first electrodes are arranged so as to face each other.
  • the manufacturing method of the laminated battery according to the present embodiment includes a step of manufacturing a plurality of the secondary batteries to be a sheet-like battery pair by the above-described method of manufacturing a secondary battery, and two adjacent sheet-like battery pairs. And laminating a plurality of the sheet-like battery pairs so that the first electrodes face each other, and the first sheet-like battery and the second sheet-like battery are arranged facing each other in plan view. In such a case, the first conductive adhesive and the second conductive adhesive provided in the plurality of sheet-like battery pairs are arranged so as to be shifted.
  • FIG. 1 is a cross-sectional view showing a configuration of a secondary battery according to a first embodiment. It is XY top view which shows typically the structure of a part of secondary battery. It is XY top view which shows typically the structure of a part of secondary battery. 3 is an XY plan view schematically showing the arrangement of a first conductive adhesive 121 and a second conductive adhesive 122. FIG. It is sectional drawing which shows the laminated structure of a comparative example.
  • FIG. 7 is a flowchart showing a manufacturing process of the secondary battery.
  • FIG. It is a top view which shows typically arrangement
  • FIG. 1 is a cross-sectional view showing a basic laminated structure of a sheet-like secondary battery.
  • the Z direction is the thickness direction (stacking direction) of a sheet-like secondary battery (hereinafter also simply referred to as a sheet-like battery), and the XY plane is a plane parallel to the sheet-like battery.
  • the sheet battery is rectangular, and the X direction and the Y direction are parallel to the edge of the sheet battery.
  • the Z direction will be described as the vertical direction.
  • a sheet battery 10 includes a laminate in which an n-type oxide semiconductor layer 13, a charge layer 14, a p-type oxide semiconductor layer 16, and a second electrode 17 are laminated in this order on a substrate 11. 20.
  • a region where the n-type oxide semiconductor layer 13, the charging layer 14, the p-type oxide semiconductor layer 16, and the second electrode 17 are stacked on the base material 11 is defined as a stacked portion 31, and the outside is a peripheral portion. This is part 32.
  • the peripheral edge 32 is a region where the base material 11 is exposed on the + Z side.
  • the base material 11 is formed of a conductive material such as metal and functions as a first electrode (negative electrode). In this embodiment, the base material 11 is a negative electrode.
  • a metal foil sheet such as a stainless steel (SUS) sheet or an aluminum sheet can be used.
  • the base material 11 should just be a structure containing a 1st electrode.
  • metal materials such as chromium (Cr) or titanium (Ti) can be used as a material of a 1st electrode.
  • an alloy film containing aluminum (Al), silver (Ag), or the like may be used.
  • the first electrode is formed on the substrate 11, it can be formed by the same method as the second electrode 17 described later.
  • Examples of the method for forming the first electrode include vapor deposition methods such as sputtering, ion plating, electron beam evaporation, vacuum evaporation, and chemical vapor deposition.
  • the metal electrode can be formed by an electrolytic plating method, an electroless plating method, or the like.
  • copper, copper alloy, nickel, aluminum, silver, gold, zinc, tin or the like can be used as a metal used for plating.
  • the n-type oxide semiconductor layer 13 includes an n-type oxide semiconductor material (second n-type oxide semiconductor material).
  • n-type oxide semiconductor layer 13 for example, titanium dioxide (TiO 2 ), tin oxide (SnO 2 ), zinc oxide (ZnO), or the like can be used.
  • the n-type oxide semiconductor layer 13 can be formed on the substrate 11 by sputtering or vapor deposition.
  • titanium dioxide (TiO 2 ) is preferably used as a material for the n-type oxide semiconductor layer 13.
  • the n-type oxide semiconductor layer 13 can be formed on the substrate 11 by sputtering or the like.
  • a titanium dioxide film can be formed by reactive sputtering using titanium as a target.
  • oxygen gas and argon gas can be used.
  • a charge layer 14 is formed on the n-type oxide semiconductor layer 13.
  • the charging layer 14 includes an insulating material.
  • a silicone resin can be used.
  • the insulating material it is preferable to use a silicon compound (silicone) having a main skeleton with a siloxane bond such as silicon oxide. Therefore, the charge layer 14 contains silicon oxide (SiO x ) as an insulating material.
  • the charging layer 14 includes an n-type oxide semiconductor material in addition to the insulating material. That is, the charging layer 14 is formed of a mixture obtained by mixing an insulating material and an n-type oxide semiconductor material. For example, a fine-particle n-type oxide semiconductor can be used as the n-type oxide semiconductor material.
  • the n-type oxide semiconductor becomes a layer having a charging function when irradiated with ultraviolet rays.
  • the n-type oxide semiconductor material of the charge layer 14 can be titanium dioxide.
  • the charging layer 14 is formed of silicon oxide and titanium dioxide.
  • tin oxide (SnO 2 ), zinc oxide (ZnO), and magnesium oxide (MgO) are suitable as the n-type oxide semiconductor material that can be used as the charging layer 14. It is also possible to use materials that combine two, three or all of titanium dioxide, tin oxide, zinc oxide, magnesium oxide.
  • the n-type oxide semiconductor material contained in the charging layer 14 and the n-type oxide semiconductor material contained in the n-type oxide semiconductor layer 13 may be the same or different.
  • the n-type oxide semiconductor material included in the n-type oxide semiconductor layer 13 is titanium oxide
  • the n-type oxide semiconductor material of the charge layer 14 may be titanium oxide or n other than titanium oxide. It may be a type oxide semiconductor material.
  • the charge layer 14 is formed of silicon oxide and titanium dioxide using n-type oxide semiconductor material as titanium dioxide.
  • n-type oxide semiconductor material that can be used in the charge layer 14
  • tin oxide (SnO 2 ) or zinc oxide (ZnO) is suitable. It is also possible to use materials that combine two or all of titanium dioxide, tin oxide, and zinc oxide.
  • a coating liquid in which a solvent is mixed with a mixture of a precursor of titanium oxide, tin oxide, or zinc oxide and silicone oil is prepared.
  • a coating solution in which fatty acid titanium and silicone oil are mixed in a solvent is prepared.
  • the coating solution is applied onto the n-type oxide semiconductor layer 13 by a spin coating method, a slit coating method, or the like.
  • the charge layer 14 can be formed on the n-type oxide semiconductor layer 13 by drying and baking the coating film.
  • the precursor titanium stearate, which is a precursor of titanium oxide, can be used, for example. Titanium oxide, tin oxide, and zinc oxide are formed by decomposition from an aliphatic acid salt that is a precursor of a metal oxide.
  • the charging layer 14 after drying and firing may be UV-cured by irradiating with ultraviolet rays.
  • fine particles of an oxide semiconductor can be used without using a precursor.
  • a liquid mixture is produced by mixing nanoparticles of titanium oxide or zinc oxide with silicone oil.
  • a coating liquid is produced
  • a coating solution is applied onto the n-type oxide semiconductor layer 13 by a spin coating method, a slit coating method, or the like.
  • the charging layer 14 can be formed by performing drying, baking, and UV irradiation on the coating film.
  • a p-type oxide semiconductor layer 16 is formed on the charging layer 14.
  • the p-type oxide semiconductor layer 16 includes a p-type oxide semiconductor material.
  • a material of the p-type oxide semiconductor layer 16 nickel oxide (NiO), copper aluminum oxide (CuAlO 2 ), or the like can be used.
  • the p-type oxide semiconductor layer 16 is a nickel oxide film having a thickness of 400 nm.
  • the p-type oxide semiconductor layer 16 is formed on the charging layer 14 by a film formation method such as vapor deposition or sputtering.
  • a second electrode 17 is formed on the p-type oxide semiconductor layer 16.
  • the second electrode 17 functions as a positive electrode.
  • the second electrode 17 only needs to be formed of a conductive film.
  • metal materials such as chromium (Cr) or copper (Cu) can be used.
  • As another metal material there is a silver (Ag) alloy containing aluminum (Al).
  • the forming method include vapor phase film forming methods such as sputtering, ion plating, electron beam evaporation, vacuum evaporation, and chemical vapor deposition.
  • the metal electrode can be formed by an electrolytic plating method, an electroless plating method, or the like.
  • copper, copper alloy, nickel, aluminum, silver, gold, zinc, tin or the like can be used as a metal used for plating.
  • the second electrode 17 is an Al film having a thickness of 300 nm.
  • the stacked body 20 includes the base material 11, the n-type oxide semiconductor layer 13, the charging layer 14, the p-type oxide semiconductor layer 16, and the second electrode 17. Therefore, the second electrode 17 is disposed on the outermost surface of the sheet battery 10.
  • the n-type oxide semiconductor layer 13 is disposed below the charging layer 14 and the p-type oxide semiconductor layer 16 is disposed above the charging layer 14.
  • the layer 13 and the p-type oxide semiconductor layer 16 may be arranged opposite to each other.
  • the n-type oxide semiconductor layer 13 may be disposed on the charging layer 14 and the p-type oxide semiconductor layer 16 may be disposed below.
  • the base material 11 is a positive electrode and the second electrode 17 is a negative electrode.
  • the charging layer 14 is sandwiched between the n-type oxide semiconductor layer 13 and the p-type oxide semiconductor layer 16
  • the n-type oxide semiconductor layer 13 may be disposed on the charging layer 14.
  • the p-type oxide semiconductor layer 16 may be disposed.
  • the sheet battery 10 includes the first electrode (base material 11), the first oxide semiconductor layer (n-type oxide semiconductor layer 13 or p-type oxide semiconductor layer 16), the charging layer 14, the second oxidation. Any structure in which the physical semiconductor layer (p-type oxide semiconductor layer 16 or n-type oxide semiconductor layer 13) and the second electrode 17 are stacked in this order may be used.
  • the sheet-like battery 10 includes a first electrode (base material 11), a first oxide semiconductor layer (n-type oxide semiconductor layer 13 or p-type oxide semiconductor layer 16), a charging layer 14, and a second oxide semiconductor.
  • a structure including a layer other than the layer (p-type oxide semiconductor layer 16 or n-type oxide semiconductor layer 13) and the second electrode 17 may be used.
  • an aluminum compound layer may be added between the charging layer 14 and the p-type oxide semiconductor layer 16.
  • aluminum compounds are Al 2 O 3 (aluminum oxide), AlN (aluminum nitride), AlON (aluminum oxynitride), Al (OH) 3 (aluminum hydroxide), and SiAlON (silicon-alumina nitride). It is preferable that at least one of them is included.
  • a layer containing nickel hydroxide may be added between the p-type oxide semiconductor layer 16 and the charging layer 14.
  • FIG. 2 is an XY plan view showing the configuration of the sheet battery 10.
  • the sheet battery 10 includes a rectangular portion 10a and a tab portion 10b.
  • the rectangular portion 10a is a portion that is rectangular in the XY plan view.
  • the tab part 10b protrudes to the + X side of the rectangular part 10a.
  • the laminated part 31 is provided in the rectangular part 10a.
  • the laminated portion 31 has a rectangular shape, and a peripheral edge portion 32 is provided outside the laminated portion 31.
  • the second electrode 17 is exposed on the + Z side (see also FIG. 1).
  • the base material 11 is exposed on the + Z side (see also FIG. 1).
  • the tab portion 10b the base material 11 is exposed on the + Z side.
  • the secondary battery according to the present embodiment has a structure in which sheet batteries as shown in FIGS. 1 and 2 are stacked. That is, the secondary battery is a laminated battery in which two or more sheet batteries 10 are laminated.
  • the configuration of the secondary battery 110 according to the present embodiment will be described.
  • FIG. 3 is a cross-sectional view schematically showing the configuration of the secondary battery 110.
  • 4 and 5 are XY plan views schematically showing a partial configuration of the secondary battery 110.
  • one of the two sheet batteries is a first sheet battery 111, and the other is a second sheet battery 112.
  • the 2nd sheet-like battery 112 has the structure shown in FIG. 1 and FIG. 2, respectively.
  • the first sheet battery 111 and the second sheet battery 112 are connected in parallel.
  • the secondary battery 110 includes a sheet battery 111, a sheet battery 112, a first conductive adhesive 121, a second conductive adhesive 122, an extraction electrode 125, and an insulating material. 128.
  • the secondary battery 110 has a configuration in which a first sheet battery 111 and a second sheet battery 112 are stacked.
  • the thickness of the 1st sheet-like battery 111 and the 2nd sheet-like battery 112 is 12 micrometers, for example.
  • the first sheet-like battery 111 and the second sheet-like battery 112 each have the laminated structure shown in FIG. 1, but are simplified as appropriate. Specifically, the n-type oxide semiconductor layer 13, the charge layer 14, and the p-type oxide semiconductor layer 16 are omitted.
  • the first sheet-like battery 111 includes a base material 11a and a second electrode 17a, which correspond to the base material 11 and the second electrode 17 shown in FIGS. ing.
  • the 2nd sheet-like battery 112 has the base material 11b and the 2nd electrode 17b, and these correspond to the base material 11 and the 2nd electrode 17 which were shown by FIG.1 and FIG.2. ing.
  • the first sheet battery 111 and the second sheet battery 112 are connected in parallel. Therefore, the base material 11b and the base material 11a are connected, and the second electrode 17a and the second electrode 17b are connected.
  • the first sheet-shaped battery 111 has a rectangular portion 111a and a tab portion 111b, which correspond to the rectangular portion 10a and the tab portion 10b shown in FIG.
  • the second sheet-like battery 112 has a rectangular portion 112a and a tab portion 112b, which correspond to the rectangular portion 10a and the tab portion 10b shown in FIG.
  • the first sheet battery 111 is disposed on the ⁇ Z side, and the second sheet battery 112 is disposed on the + Z side.
  • the first sheet-shaped battery 111 and the second sheet-shaped battery 112 have the same size and the same shape.
  • the rectangular part 111a and the rectangular part 112a overlap in XY plane.
  • the tab part 111b and the tab part 112b overlap in the XY plane.
  • the first sheet-shaped battery 111 and the second sheet-shaped battery 112 are disposed to face each other so that the second electrodes 17a and 17b face each other.
  • the second electrode 17a is disposed on the + Z side
  • the base material 11a is disposed on the ⁇ Z side.
  • the second electrode 17b is disposed on the ⁇ Z side
  • the base material 11b is disposed on the + Z side. That is, the second sheet-like battery 112 has a stacked configuration in which the stacked body 20 shown in FIG. 1 is turned upside down.
  • an extraction electrode 125 is disposed between the first sheet-like battery 111 and the second sheet-like battery 112.
  • the extraction electrode 125 connects the second electrode 17 a of the first sheet battery 111 and the second electrode 17 b of the second sheet battery 112.
  • the extraction electrode 125 is, for example, a metal sheet.
  • the thickness of the extraction electrode 125 is, for example, 10 ⁇ m.
  • the extraction electrode 125 is drawn from between the first sheet battery 111 and the second sheet battery 112 to the outside of the first sheet battery 111 and the second sheet battery 112. Specifically, the extraction electrode 125 is extracted to the ⁇ X side from between the first sheet battery 111 and the second sheet battery 112. That is, the extraction electrode 125 is extracted from the laminated portion 31 through the peripheral edge portion 32 to the outside of the first sheet battery 111 and the second sheet battery 112.
  • the extraction electrode 125 is a metal sheet having a rectangular shape in which the X direction is the longitudinal direction and the Y direction is the short direction (see also FIG. 4).
  • a first conductive adhesive 121 is disposed between the extraction electrode 125 and the first sheet battery 111.
  • the extraction electrode 125 and the second electrode 17 a of the first sheet battery 111 are electrically connected via the first conductive adhesive 121.
  • the thickness of the first conductive adhesive 121 is, for example, 10 ⁇ m.
  • a second conductive adhesive 122 is disposed between the extraction electrode 125 and the second sheet battery 112.
  • the extraction electrode 125 and the second electrode 17 b of the second sheet battery 112 are electrically connected via the first conductive adhesive 121.
  • the thickness of the second conductive adhesive 122 is, for example, 10 ⁇ m.
  • the extraction electrode 125 electrically connects the second electrode 17 a of the second sheet battery 112 to the second electrode 17 b of the second sheet battery 112. Moreover, the tab part 111b of the 1st sheet-like battery 111 and the tab part 112b of the 2nd sheet-like battery 112 are connected. The base material 11a is exposed at the tab portion 111b, and the base material 11b is exposed at the tab portion 112b. Therefore, in the location where the tab parts 111b and 112b overlap, the base material 11a and the base material 11b, which are the first electrodes, are arranged to face each other.
  • the first sheet battery 111 and the second sheet battery 112 are connected in parallel.
  • the tab portion 111b and the tab portion 112b can be connected by crimping or ultrasonic welding.
  • the tab portion 111b and the tab portion 112b may be connected using a conductive adhesive.
  • the tab part 111b of the 1st sheet-like battery 111 and the tab part 112b of the 2nd sheet-like battery 112 overlap. Therefore, the base materials 11a and 11b to be the first electrodes can be easily connected.
  • an insulating material 128 is provided around the extraction electrode 125 in the peripheral portion 32 on the ⁇ X side.
  • the insulating material 128 is disposed between the first sheet battery 111 and the extraction electrode 125.
  • the insulating member 128 is disposed between the second sheet battery 112 and the extraction electrode 125.
  • the insulating member 128 is disposed at a position where the base materials 11 a and 11 b are exposed and the base materials 11 a and 11 b are opposed to the extraction electrode 125. In other words, the insulating material 128 is disposed at a location where the peripheral edge portion 32 and the extraction electrode 125 face each other.
  • the insulating material 128 By applying the insulating material 128 to the extraction electrode 125 at a position corresponding to the peripheral edge portion 32, it is possible to prevent the base material 11 a and the base material 11 b that are the first electrodes from being short-circuited with the extraction electrode 125.
  • the insulating material 128 is formed so as to cover a part of the extraction electrode 125. Or the insulating material 128 may be apply
  • the insulating material 128 is coated by vapor deposition or spray application.
  • a resin film such as polyimide can be used.
  • the insulating material 128 preferably has elasticity. The thickness of the insulating material 128 is 10 ⁇ m.
  • FIG. 4 is an XY plan view showing a partial configuration of the secondary battery 110. More specifically, FIG. 4 is a top view showing the configuration of the secondary battery 110 with the second sheet battery 112 removed.
  • a plurality of second conductive adhesives 122 are arranged on the extraction electrode 125.
  • Ten second conductive adhesives 122 are provided in a staggered arrangement.
  • the second conductive adhesives 122 are arranged in two rows. In each row, five second conductive adhesives 122 are provided.
  • the + Y side column is the first column and the -Y side column is the second column.
  • the positions of the second conductive adhesive 122 in the first row and the second conductive adhesive 122 in the second row are shifted in the X direction. Specifically, from the ⁇ X side to the + X side, the second conductive adhesive 122 in the second column and the second conductive adhesive in the first column, starting from the second conductive adhesive 122 in the second column.
  • the adhesives 122 are alternately arranged one by one.
  • FIG. 4 is an XY plan view showing a partial configuration of the secondary battery 110. More specifically, FIG. 4 is a top view showing the configuration of the secondary battery 110 from which the second sheet battery 112, the extraction electrode 125, and the insulating member 128 are removed.
  • first conductive adhesives 121 are disposed on the second electrode 17 a of the first sheet battery 111.
  • ten first conductive adhesives 121 are provided in a staggered arrangement.
  • the first conductive adhesives 121 are arranged in two rows. In each row, five first conductive adhesives 121 are provided.
  • the + Y side column is the first column and the -Y side column is the second column.
  • the positions of the first conductive adhesive 121 in the first row and the first conductive adhesive 121 in the second row are shifted in the X direction. Specifically, from the ⁇ X side to the + X side, the first conductive adhesive 121 in the first row and the first conductive adhesive 121 in the second row starting from the first conductive adhesive 121 in the first row.
  • the adhesives 121 are alternately arranged one by one.
  • FIG. 6 is a top view schematically showing the arrangement of the first conductive adhesive 121 and the second conductive adhesive 122 in the XY plane.
  • the extraction electrode 125 and the second sheet battery 112 are omitted.
  • the first conductive adhesive 121 and the second conductive adhesive 122 are arranged so as to be shifted in the XY plan view. Specifically, the first conductive adhesive 121 is disposed so as not to overlap with the second conductive adhesive 122. Further, the second conductive adhesive 122 is disposed so as not to overlap with the first conductive adhesive 121.
  • the first conductive adhesive 121 and the second conductive adhesive 122 are alternately placed one by one from the ⁇ X side toward the + X side, starting with the first conductive adhesive 121.
  • the second conductive adhesive 122 and the first conductive adhesive 121 are alternately arranged one by one from the ⁇ X side toward the + X side, starting with the second conductive adhesive 122. ing.
  • the first conductive adhesive 121 and the second conductive adhesive 122 are arranged so as not to overlap. That is, in the XY plan view, the first conductive adhesive 121 and the second conductive adhesive 122 are arranged so as not to overlap. By doing in this way, the increase in the thickness of the secondary battery 110 can be prevented.
  • FIG. 7 is a cross-sectional view schematically showing a laminated structure of the secondary battery 110A according to the comparative example.
  • a conductive tape 151 is provided between the extraction electrode 125 and the first sheet battery 111.
  • a conductive tape 152 is provided between the extraction electrode 125 and the second sheet battery 112. The conductive tape 151 and the conductive tape 152 are overlapped.
  • each of the conductive tapes 151 and 152 is 25 ⁇ m.
  • the thickness (50 ⁇ m) of the two conductive tapes 151 and 152 increases.
  • the first conductive adhesive 121 and the second conductive adhesive 122 are arranged so as to be shifted. For this reason, an increase in thickness due to the overlapping of the conductive adhesive can be prevented, and the secondary battery 110 can be thinned.
  • the first conductive adhesive 121 and the second conductive adhesive 122 are arranged in a staggered manner, whereby the bonded portions can be dispersed. As shown in FIG. 6, the first conductive adhesive 121 and the second conductive adhesive 122 are alternately arranged along the X direction.
  • the 1st sheet-like battery 111 and the 2nd sheet-like battery 112 can be adhere
  • FIG. 8 is a flowchart showing a method for manufacturing the secondary battery 110.
  • the connection method of the base material 11a used as the 1st electrode and the base material 11b is not specifically limited, it is abbreviate
  • the first conductive adhesive 121 is applied on the second electrode 17a of the first sheet battery 111 (S11).
  • the dispenser applies the first conductive adhesive 121 to a predetermined size and a predetermined position.
  • the dispenser controls the application amount and the application position.
  • the dispenser applies the first conductive adhesive 121 to the upper surface of the second electrode 17a so that the first conductive adhesive 121 has a circular shape with a diameter of 0.64 ⁇ m. As a result, the configuration shown in FIG. 5 is obtained.
  • the extraction electrode 125 is attached to the first sheet-like battery 111 through the first conductive adhesive 121 (S12). Specifically, the extraction electrode 125 is pressed toward the first sheet battery 111. As a result, the first conductive adhesive 121 is pressed against the first sheet battery 111 and deformed. An extraction electrode 125 is connected to the first conductive adhesive 121, and the extraction electrode 125 is bonded to the first sheet battery 111. Therefore, the second electrode 17 a and the extraction electrode 125 of the first sheet battery 111 are connected via the first conductive adhesive 121.
  • the deformed first conductive adhesive 121 is, for example, a circle having a diameter of 1.5 mm. Further, the thickness (height) of the first conductive adhesive 121 after deformation is, for example, 10 ⁇ m.
  • the extraction electrode 125 can be fixed to the first sheet battery 111 by curing the first conductive adhesive 121.
  • the second conductive adhesive 122 is applied on the extraction electrode 125 (S13).
  • the dispenser used in S11 applies the second conductive adhesive 122 to the upper surface of the extraction electrode 125.
  • the second conductive adhesive 122 is disposed so as not to overlap the first conductive adhesive 121 in the XY plan view (see also FIG. 6).
  • the configuration shown in FIG. 4 is obtained.
  • the application size of the second conductive adhesive 122 the first conductive adhesive 121 is similarly circular with a diameter of 0.64 ⁇ m.
  • the 2nd sheet-like battery 112 is affixed on the extraction electrode 125 (S14).
  • the second sheet battery 112 is pressed toward the first sheet battery 111. Accordingly, the second conductive adhesive 122 is pressed against the first sheet battery 111 and deformed.
  • the extraction electrode 125 is connected to the second conductive adhesive 122, and the second sheet battery 112 is bonded to the extraction electrode 125 on the first sheet battery 111. Therefore, the second electrode 17 b of the second conductive adhesive 122 and the extraction electrode 125 are connected via the second conductive adhesive 122.
  • the size of the deformed second sheet battery 112 is about 1.5 ⁇ m, similar to the first conductive adhesive 121.
  • the second sheet-like battery 112 can be fixed to the extraction electrode 125 by curing the second conductive adhesive 122.
  • the secondary battery 110 in which the pair of sheet batteries 111 and 112 are stacked is completed.
  • the first conductive adhesive 121 and the second conductive adhesive 122 are shifted from each other when viewed in a plan view in a state where the first sheet battery 111 and the second sheet battery 112 are arranged to face each other. Therefore, the thin secondary battery 110 can be manufactured.
  • Embodiment 2 the secondary battery 110 having the structure shown in Embodiment 1 is further stacked. Specifically, the secondary battery 110 having a pair of sheet batteries is used as a sheet battery pair, and a plurality of sheet battery pairs are stacked. Therefore, the description of the sheet-like battery pair will be omitted as appropriate.
  • FIG. 9 is a cross-sectional view showing the configuration of the laminated battery 200.
  • FIG. 10 is a schematic diagram for explaining the arrangement of the conductive adhesive in each layer.
  • the secondary battery 110 of Embodiment 1 is stacked. Specifically, the secondary battery 110 is connected in parallel as a sheet-like battery pair. By doing in this way, a large capacity secondary battery can be provided.
  • the laminated battery 200 has five sheet-like battery pairs 201-205. Each of the sheet-like battery pairs 201 to 205 corresponds to the secondary battery 110 shown in the first embodiment. Therefore, the laminated battery 200 is constituted by five layers of sheet-like battery pairs 201 to 205.
  • the arrangement of the first conductive adhesive 121 and the second conductive adhesive 122 is one of the technical features. Since the basic configuration of the sheet-like battery pairs 201 to 205 is the same as that of the secondary battery 110 shown in Embodiment 1, the description thereof is omitted.
  • the sheet-like battery pair 201, the sheet-like battery pair 202, the sheet-like battery pair 203, the sheet-like battery pair 204, and the sheet-like battery pair 205 are stacked in order from the -X side.
  • Two sheet batteries included in the sheet battery pair 201 are referred to as a first sheet battery 211a and a second sheet battery 212a.
  • the first sheet battery 211a corresponds to the first sheet battery 111 of the first embodiment
  • the second sheet battery 212a corresponds to the second sheet battery 112.
  • the two sheet batteries included in the sheet battery pair 202 are referred to as a first sheet battery 211b and a second sheet battery 212b.
  • the two sheet batteries included in the sheet battery pair 203 are referred to as a first sheet battery 211c and a second sheet battery 212c.
  • the two sheet batteries included in the sheet battery pair 204 are referred to as a first sheet battery 211d and a second sheet battery 212d.
  • the two sheet batteries included in the sheet battery pair 205 are a first sheet battery 211e and a second sheet battery 212e.
  • the laminated battery 200 includes the five sheet-like batteries 211a to 211e and the five sheet-like batteries 212a to 212e. Therefore, in the laminated battery 200, ten sheet-like batteries 211a to 211e and 212a to 212e are laminated.
  • the second electrodes are arranged so as to face each other. Therefore, in the two adjacent sheet-like battery pairs, the base materials that are the first electrodes are arranged so as to face each other.
  • the extraction electrodes included in the sheet batteries 201 to 205 are referred to as extraction electrodes 125a to 125e, respectively.
  • the first conductive adhesives included in the sheet batteries 201 to 205 are referred to as first conductive adhesives 121a to 121e, respectively.
  • the second conductive adhesives included in the sheet batteries 201 to 205 are referred to as second conductive adhesives 122a to 122e, respectively.
  • the extraction electrodes 125a to 125e are arranged so as to overlap each other.
  • the sheet battery 201 includes four first conductive adhesives 121a and four second conductive adhesives 122a.
  • the four first conductive adhesives 121a and the four second conductive adhesives 122a are staggered.
  • the sheet-like battery 202 includes four first conductive adhesives 121b and four second conductive adhesives 122b.
  • the four first conductive adhesives 121b and the four second conductive adhesives 122b are staggered.
  • the sheet-like battery 203 includes four first conductive adhesives 121c and four second conductive adhesives 122c. The four first conductive adhesives 121c and the four second conductive adhesives 122c are staggered.
  • the sheet battery 204 includes four first conductive adhesives 121d and four second conductive adhesives 122d. The four first conductive adhesives 121d and the four second conductive adhesives 122d are staggered.
  • the sheet battery 205 includes four first conductive adhesives 121e and four second conductive adhesives 122e. The four first conductive adhesives 121e and the four second conductive adhesives 122e are staggered.
  • FIG. 11 is a diagram showing all of the first conductive adhesives 121a to 121e and the second conductive adhesives 122a to 122e in the XY plan view. As shown in FIG. 11, the first conductive adhesives 121a to 121e and the second conductive adhesives 122a to 122e are formed in two rows. Then, 20 conductive adhesives are arranged in each row.
  • the first conductive adhesives 121a to 121e and the second conductive adhesives 122a to 122e are displaced from each other. That is, in the XY plan view, all 40 conductive adhesives are arranged so as to be shifted.
  • the first conductive adhesive 121a is disposed so as not to overlap any of the first conductive adhesives 121b to 121e and the second conductive adhesives 122a to 122e.
  • any one of the first conductive adhesives 121a to 121e and the second conductive adhesives 122a to 122e is displaced from the conductive adhesives of the other sheet-like battery pairs.
  • the first conductive adhesives 121a to 121e and the second conductive adhesives 122a to 122e so as not to overlap, an increase in the thickness of the multilayer battery 200 can be prevented.
  • a manufacturing method for manufacturing the laminated battery 200 shown in FIGS. 9 and 10 will be described.
  • the secondary battery 110 is a sheet battery pair.
  • a plurality of sheet-like battery pairs are stacked.
  • the sheet-shaped battery pairs are laminated so that the first electrodes (base materials) face each other.
  • the extraction electrodes 125 are connected.
  • the first electrode can be connected at the tab portion. Thereby, a thin and high performance laminated battery can be manufactured.
  • this invention includes the appropriate deformation

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

Provided is a technology for allowing thinning of a secondary battery in which sheet-like batteries are laminated. A secondary battery (110) according to this embodiment is provided with: a first sheet-like battery (111) that has a first electrode and a second electrode; a second sheet-like battery (112) that has a first electrode and a second electrode and that is disposed opposite to the first sheet-like battery (111) such that the second electrodes (17a), (17b) oppose each other; a lead-out electrode (125) that is disposed between the second electrode (17a) of the first sheet-like battery (111) and the second electrode (17b) of the second sheet-like battery (112); a first conductive adhesive (121) that connects the second electrode (17a) of the first sheet-like battery (111) and the lead-out electrode (125) to each other; and a second conductive adhesive (122) that connects the second electrode (17b) of the second sheet-like battery (112) and the lead-out electrode (125) to each other. In an XY-planar view, the first conductive adhesive (121) and the second conductive adhesive (122) are arranged so as to be shifted from each other.

Description

二次電池、積層電池、及び製造方法Secondary battery, laminated battery, and manufacturing method
　本発明は、複数のシート状電池が積層された二次電池を薄型化するための技術に関する。 The present invention relates to a technique for thinning a secondary battery in which a plurality of sheet batteries are stacked.
　特許文献１には、複数のシート状電池を積層した積層電池が開示されている。特許文献１では、２枚のシート状電池が、第２電極同士が向かい合うように配置されている。シート状電池は、タブ部を有している。そして、タブ部にタブリードが接続されている。 Patent Document 1 discloses a stacked battery in which a plurality of sheet batteries are stacked. In Patent Document 1, two sheet batteries are arranged so that the second electrodes face each other. The sheet battery has a tab portion. A tab lead is connected to the tab portion.
特開２０１７―１２３２３０号公報JP 2017-123230 A
　複数のシート状電池を積層した二次電池では、より薄型化することが望まれている。 In a secondary battery in which a plurality of sheet batteries are stacked, it is desired to make them thinner.
　本発明は、上記の課題に鑑みてなされたものであり、複数のシート状電池が積層された二次電池を薄型化する技術を提供することを目的とする。 The present invention has been made in view of the above-described problems, and an object thereof is to provide a technique for thinning a secondary battery in which a plurality of sheet batteries are stacked.
　本実施形態の一態様に係る二次電池は、第１電極、及び第２電極を有する第１シート状電池と、第１電極、及び第２電極を有し、前記第２電極同士が向かい合うように前記第１シート状電池と対向配置された第２シート状電池と、前記第１シート状電池の第２電極と前記第２シート状電池の前記第２電極との間に配置された引出電極と、前記第１シート状電池の前記第２電極と前記引出電極とを接続する第１導電性接着剤と、前記第２シート状電池の前記第２電極と前記引出電極とを接続する第２導電性接着剤と、を備え、前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視において、前記第１導電性接着剤と前記第２導電性接着剤とがずれて配置されている。 A secondary battery according to an aspect of the present embodiment includes a first sheet-like battery having a first electrode and a second electrode, a first electrode, and a second electrode, such that the second electrodes face each other. A second sheet-shaped battery disposed opposite to the first sheet-shaped battery, and an extraction electrode disposed between the second electrode of the first sheet-shaped battery and the second electrode of the second sheet-shaped battery. A first conductive adhesive that connects the second electrode and the extraction electrode of the first sheet battery, and a second that connects the second electrode and the extraction electrode of the second sheet battery. A conductive adhesive, and the first conductive adhesive and the second conductive adhesive in a plan view in a state where the first sheet battery and the second sheet battery are disposed to face each other. Are arranged out of position.
　上記の二次電池において、前記引出電極と前記第１シート状電池の第２電極との間には、複数の第１導電性接着剤が配置されており、前記引出電極と前記第１シート状電池の第２電極との間には、複数の第２導電性接着剤が配置されており、前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視において、前記第１導電性接着剤と前記第２導電性接着剤とが交互に配置されていることが好ましい。 In the above secondary battery, a plurality of first conductive adhesives are disposed between the extraction electrode and the second electrode of the first sheet-shaped battery, and the extraction electrode and the first sheet-shaped A plurality of second conductive adhesives are disposed between the second electrodes of the battery, and in a plan view in a state where the first sheet-shaped battery and the second sheet-shaped battery are disposed to face each other, It is preferable that the first conductive adhesive and the second conductive adhesive are alternately arranged.
　上記の二次電池において、前記引出電極の長手方向に沿って、前記第１導電性接着剤と前記第２導電性接着剤とが交互に配置されていることが好ましい。 In the above secondary battery, it is preferable that the first conductive adhesive and the second conductive adhesive are alternately arranged along the longitudinal direction of the extraction electrode.
　上記の二次電池において、前記第１シート状電池及び第２シート状電池がタブ部を有しており、前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視において、前記第１シート状電池の前記タブ部と第２シート状電池がタブ部とが重複しており、前記第１シート状電池の前記タブ部と第２シート状電池がタブ部では、第１電極同士が向かい合うように配置されていることが好ましい In the above secondary battery, the first sheet-shaped battery and the second sheet-shaped battery have a tab portion, and the plane in a state where the first sheet-shaped battery and the second sheet-shaped battery are arranged to face each other. In view, the tab portion of the first sheet battery and the tab portion of the second sheet battery overlap, and the tab portion of the first sheet battery and the second sheet battery are tab portions. It is preferable that the first electrodes are arranged so as to face each other.
　本実施の形態にかかる積層電池は、上記の二次電池をシート状電池ペアとして、前記シート状電池ペアを複数備え、隣接する２つの前記シート状電池ペアの前記第１電極同士が向かい合うように、複数の前記シート状電池ペアが積層されており、前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視した場合に、前記複数のシート状電池ペアに設けられた前記第１導電性接着剤及び前記第２導電性接着剤がずれて配置されている。 The laminated battery according to the present embodiment includes the above-described secondary battery as a sheet-like battery pair, and includes a plurality of the sheet-like battery pairs so that the first electrodes of two adjacent sheet-like battery pairs face each other. A plurality of the sheet-like battery pairs are stacked, and the first sheet-like battery and the second sheet-like battery are arranged to face each other when viewed in a plan view. The first conductive adhesive and the second conductive adhesive thus formed are shifted from each other.
　本実施形態の一態様に係る二次電池の製造方法は、第１電極、及び第２電極を有する第１シート状電池の前記第２電極の上に、第１導電性接着剤を塗布する工程と、前記第１導電性接着剤に引出電極を接続する工程と、前記引出電極の上に、第２導電性接着剤を塗布する工程と、第１電極、及び第２電極を有する第２シート状電池の前記第２電極を前記第２導電性接着剤に接続する工程と、を備え、前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視において、前記第１導電性接着剤と前記第２導電性接着剤とがずれて配置されている。 The manufacturing method of the secondary battery which concerns on 1 aspect of this embodiment is a process of apply | coating a 1st conductive adhesive on the said 2nd electrode of the 1st sheet-like battery which has a 1st electrode and a 2nd electrode. A step of connecting an extraction electrode to the first conductive adhesive, a step of applying a second conductive adhesive on the extraction electrode, a second sheet having the first electrode and the second electrode Connecting the second electrode of the battery to the second conductive adhesive, and in a plan view of the state where the first sheet battery and the second sheet battery are disposed facing each other, The first conductive adhesive and the second conductive adhesive are shifted from each other.
　上記の二次電池の製造方法において、前記引出電極と前記第１シート状電池の第２電極との間には、複数の第１導電性接着剤が配置されており、前記引出電極と前記第１シート状電池の第２電極との間には、複数の第２導電性接着剤が配置されており、前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視において、前記第１導電性接着剤と前記第２導電性接着剤とが交互に配置されていることが好ましい。 In the above secondary battery manufacturing method, a plurality of first conductive adhesives are disposed between the extraction electrode and the second electrode of the first sheet-like battery, and the extraction electrode and the first electrode A plurality of second conductive adhesives are arranged between the second electrodes of one sheet-like battery, and the plane in a state where the first sheet-like battery and the second sheet-like battery are arranged to face each other. In view, it is preferable that the first conductive adhesive and the second conductive adhesive are alternately arranged.
　上記の二次電池の製造方法において、前記引出電極の長手方向に沿って、前記第１導電性接着剤と前記第２導電性接着剤とが交互に配置されていることが好ましい。 In the method for manufacturing a secondary battery, it is preferable that the first conductive adhesive and the second conductive adhesive are alternately arranged along the longitudinal direction of the extraction electrode.
　上記の二次電池の製造方法において、前記第１シート状電池及び第２シート状電池がタブ部を有しており、前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視において、前記第１シート状電池の前記タブ部と第２シート状電池がタブ部とが重複しており、前記第１シート状電池の前記タブ部と第２シート状電池がタブ部では、第１電極同士が向かい合うように配置されていることが好ましい。 In the above secondary battery manufacturing method, the first sheet-shaped battery and the second sheet-shaped battery have a tab portion, and the first sheet-shaped battery and the second sheet-shaped battery are arranged to face each other. In a plan view of the state, the tab portion of the first sheet battery and the tab portion of the second sheet battery overlap, and the tab portion of the first sheet battery and the second sheet battery are tabs. In the part, it is preferable that the first electrodes are arranged so as to face each other.
　本実施の形態にかかる積層電池の製造方法は、上記の二次電池の製造方法によって、シート状電池ペアとなる前記二次電池を複数製造する工程と、隣接する２つの前記シート状電池ペアの前記第１電極同士が向かい合うように、複数の前記シート状電池ペアを積層する工程と、を備え、前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視した場合に、前記複数のシート状電池ペアに設けられた前記第１導電性接着剤及び前記第２導電性接着剤がずれて配置されている。 The manufacturing method of the laminated battery according to the present embodiment includes a step of manufacturing a plurality of the secondary batteries to be a sheet-like battery pair by the above-described method of manufacturing a secondary battery, and two adjacent sheet-like battery pairs. And laminating a plurality of the sheet-like battery pairs so that the first electrodes face each other, and the first sheet-like battery and the second sheet-like battery are arranged facing each other in plan view. In such a case, the first conductive adhesive and the second conductive adhesive provided in the plurality of sheet-like battery pairs are arranged so as to be shifted.
　本発明によれば、二次電池を薄型化する技術を提供することができる。 According to the present invention, it is possible to provide a technique for thinning the secondary battery.
シート状電池の断面構造を示す図である。It is a figure which shows the cross-section of a sheet-like battery. シート状電池の構成を示す平面図である。It is a top view which shows the structure of a sheet-like battery. 本実施の形態１にかかる二次電池の構成を示す断面図である。1 is a cross-sectional view showing a configuration of a secondary battery according to a first embodiment. 二次電池の一部の構成を模式的に示すＸＹ平面図である。It is XY top view which shows typically the structure of a part of secondary battery. 二次電池の一部の構成を模式的に示すＸＹ平面図である。It is XY top view which shows typically the structure of a part of secondary battery. 第１導電性接着剤１２１と第２導電性接着剤１２２の配置を模式的に示すＸＹ平面図である。3 is an XY plan view schematically showing the arrangement of a first conductive adhesive 121 and a second conductive adhesive 122. FIG. 比較例の積層構造を示す断面図である。It is sectional drawing which shows the laminated structure of a comparative example. 図７は、二次電池の製造工程を示すフローチャートである。FIG. 7 is a flowchart showing a manufacturing process of the secondary battery. 本実施の形態２にかかる二次電池の構成を示す断面図である。It is sectional drawing which shows the structure of the secondary battery concerning this Embodiment 2. FIG. 各シート状電池ペアにおける導電性接着剤の配置を模式的に示す平面図である。It is a top view which shows typically arrangement | positioning of the conductive adhesive in each sheet-like battery pair. 全ての導電性接着剤の配置を模式的に示すＸＹ平面図である。It is XY top view which shows typically arrangement | positioning of all the conductive adhesives.
　以下、本発明の実施形態の一例について図面を参照して説明する。以下の説明は、本発明の好適な実施形態を示すものであって、本発明の技術的範囲が以下の実施形態に限定されるものではない。 Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. The following description shows preferred embodiments of the present invention, and the technical scope of the present invention is not limited to the following embodiments.
実施の形態１．
（シート状電池の積層構造）
　以下、本実施の形態にかかる二次電池の基本的な構成について、図１を用いて説明する。図１は、シート状二次電池の基本的な積層構造を示す断面図である。なお、説明の明確化のため、以下の図には適宜、ＸＹＺ３次元直交座標系が示されている。Ｚ方向は、シート状の二次電池（以下、単にシート状電池とも称する）の厚さ方向（積層方向）となり、ＸＹ平面はシート状電池と平行な平面となる。また、ＸＹ平面において、シート状電池は矩形状であり、Ｘ方向、及びＹ方向は、シート状電池の端辺に平行な方向となっている。Ｚ方向を上下方向として説明する。 Embodiment 1 FIG.
(Laminated structure of sheet batteries)
The basic configuration of the secondary battery according to the present embodiment will be described below with reference to FIG. FIG. 1 is a cross-sectional view showing a basic laminated structure of a sheet-like secondary battery. For clarity of explanation, the following drawings appropriately show an XYZ three-dimensional orthogonal coordinate system. The Z direction is the thickness direction (stacking direction) of a sheet-like secondary battery (hereinafter also simply referred to as a sheet-like battery), and the XY plane is a plane parallel to the sheet-like battery. In addition, in the XY plane, the sheet battery is rectangular, and the X direction and the Y direction are parallel to the edge of the sheet battery. The Z direction will be described as the vertical direction.
　図１において、シート状電池１０は、基材１１上に、ｎ型酸化物半導体層１３、充電層１４、ｐ型酸化物半導体層１６、及び第２電極１７がこの順序で積層された積層体２０を有している。なお、基材１１の上に、ｎ型酸化物半導体層１３、充電層１４、ｐ型酸化物半導体層１６、及び第２電極１７が積層されている領域を積層部３１とし、その外側を周縁部３２とする。周縁部３２は、＋Ｚ側において、基材１１が露出している領域である。 In FIG. 1, a sheet battery 10 includes a laminate in which an n-type oxide semiconductor layer 13, a charge layer 14, a p-type oxide semiconductor layer 16, and a second electrode 17 are laminated in this order on a substrate 11. 20. A region where the n-type oxide semiconductor layer 13, the charging layer 14, the p-type oxide semiconductor layer 16, and the second electrode 17 are stacked on the base material 11 is defined as a stacked portion 31, and the outside is a peripheral portion. This is part 32. The peripheral edge 32 is a region where the base material 11 is exposed on the + Z side.
　基材１１は金属等の導電性物質等により形成され、第１電極（負極）として機能する。本実施形態では、基材１１が負極となっている。基材１１としては、例えば、ステンレス鋼（ＳＵＳ）シートやアルミニウムシート等の金属箔シートを用いることができる。 The base material 11 is formed of a conductive material such as metal and functions as a first electrode (negative electrode). In this embodiment, the base material 11 is a negative electrode. As the base material 11, for example, a metal foil sheet such as a stainless steel (SUS) sheet or an aluminum sheet can be used.
　絶縁材料からなる基材１１を用意して、基材１１上に第１電極を形成することもできる。すなわち、基材１１は第１電極を含む構成であればよい。基材１１の上に、第１電極を形成する場合、第１電極の材料として、クロム（Ｃｒ）又はチタン（Ｔｉ）等の金属材料を用いることができる。第１電極の材料として、アルミニウム（Ａｌ）、銀（Ａｇ）等を含む合金膜を用いてもよい。第１電極を基材１１上に形成する場合、後述する第２電極１７と同様の方法で形成することができる。 It is also possible to prepare the base material 11 made of an insulating material and form the first electrode on the base material 11. That is, the base material 11 should just be a structure containing a 1st electrode. When forming a 1st electrode on the base material 11, metal materials, such as chromium (Cr) or titanium (Ti), can be used as a material of a 1st electrode. As a material for the first electrode, an alloy film containing aluminum (Al), silver (Ag), or the like may be used. When the first electrode is formed on the substrate 11, it can be formed by the same method as the second electrode 17 described later.
　第１電極の形成方法としては、スパッタリング、イオンプレーティング、電子ビーム蒸着、真空蒸着、化学蒸着等の気相成膜法を挙げることができる。また、金属電極は電解メッキ法、無電解メッキ法等により形成することができる。メッキに使用される金属としては、一般に銅、銅合金、ニッケル、アルミ、銀、金、亜鉛又はスズ等を使用することが可能である。 Examples of the method for forming the first electrode include vapor deposition methods such as sputtering, ion plating, electron beam evaporation, vacuum evaporation, and chemical vapor deposition. The metal electrode can be formed by an electrolytic plating method, an electroless plating method, or the like. In general, copper, copper alloy, nickel, aluminum, silver, gold, zinc, tin or the like can be used as a metal used for plating.
　基材１１の上には、ｎ型酸化物半導体層１３が形成されている。ｎ型酸化物半導体層１３はｎ型酸化物半導体材料（第２ｎ型酸化物半導体材料）を含んで構成される。ｎ型酸化物半導体層１３としては、例えば、二酸化チタン（ＴｉＯ２）、酸化スズ（ＳｎＯ２）又は酸化亜鉛（ＺｎＯ）等を使用することが可能である。例えば、ｎ型酸化物半導体層１３は、スパッタリング又は蒸着により、基材１１上に成膜することができる。ｎ型酸化物半導体層１３の材料として、二酸化チタン（ＴｉＯ２）を用いることが好ましい。 An n-type oxide semiconductor layer 13 is formed on the base material 11. The n-type oxide semiconductor layer 13 includes an n-type oxide semiconductor material (second n-type oxide semiconductor material). As the n-type oxide semiconductor layer 13, for example, titanium dioxide (TiO 2 ), tin oxide (SnO 2 ), zinc oxide (ZnO), or the like can be used. For example, the n-type oxide semiconductor layer 13 can be formed on the substrate 11 by sputtering or vapor deposition. As a material for the n-type oxide semiconductor layer 13, titanium dioxide (TiO 2 ) is preferably used.
　例えば、ｎ型酸化物半導体層１３は、スパッタリング等により、基材１１上に成膜することができる。例えば、チタンをターゲットとする反応性スパッタにより、二酸化チタン膜を形成することができる。反応性スパッタでは、例えば、酸素ガス及びアルゴンガスを用いることができる。 For example, the n-type oxide semiconductor layer 13 can be formed on the substrate 11 by sputtering or the like. For example, a titanium dioxide film can be formed by reactive sputtering using titanium as a target. In reactive sputtering, for example, oxygen gas and argon gas can be used.
　ｎ型酸化物半導体層１３の上には、充電層１４が形成されている。充電層１４は、絶縁材料を含んでいる。この絶縁材料としては、シリコーン樹脂を用いることができる。例えば、絶縁材料としては、シリコン酸化物等のシロキサン結合による主骨格を持つシリコン化合物（シリコーン）を使用することが好ましい。よって、充電層１４は、絶縁材料として酸化ケイ素（ＳｉＯｘ）を含んでいる。 A charge layer 14 is formed on the n-type oxide semiconductor layer 13. The charging layer 14 includes an insulating material. As this insulating material, a silicone resin can be used. For example, as the insulating material, it is preferable to use a silicon compound (silicone) having a main skeleton with a siloxane bond such as silicon oxide. Therefore, the charge layer 14 contains silicon oxide (SiO x ) as an insulating material.
　また、充電層１４は、絶縁材料に加えて、ｎ型酸化物半導体材料を含んでいる。すなわち、充電層１４は、絶縁材料とｎ型酸化物半導体材料とを混合した混合物により形成されている。例えば、ｎ型酸化物半導体材料として、微粒子のｎ型酸化物半導体を使用することが可能である。ｎ型酸化物半導体は、紫外線照射により、充電機能を備えた層となる。 Further, the charging layer 14 includes an n-type oxide semiconductor material in addition to the insulating material. That is, the charging layer 14 is formed of a mixture obtained by mixing an insulating material and an n-type oxide semiconductor material. For example, a fine-particle n-type oxide semiconductor can be used as the n-type oxide semiconductor material. The n-type oxide semiconductor becomes a layer having a charging function when irradiated with ultraviolet rays.
　例えば、充電層１４のｎ型酸化物半導体材料を二酸化チタンとすることができる。充電層１４は、酸化シリコンと二酸化チタンとによって形成される。この他に、充電層１４として使用可能なｎ型酸化物半導体材料としては、酸化スズ（ＳｎＯ２）、酸化亜鉛（ＺｎＯ）、酸化マグネシウム（ＭｇＯ）が好適である。二酸化チタン、酸化スズ、酸化亜鉛、酸化マグネシウムの２つ、３つ、又は全てを組み合わせた材料を使用することも可能である。 For example, the n-type oxide semiconductor material of the charge layer 14 can be titanium dioxide. The charging layer 14 is formed of silicon oxide and titanium dioxide. In addition, tin oxide (SnO 2 ), zinc oxide (ZnO), and magnesium oxide (MgO) are suitable as the n-type oxide semiconductor material that can be used as the charging layer 14. It is also possible to use materials that combine two, three or all of titanium dioxide, tin oxide, zinc oxide, magnesium oxide.
　充電層１４に含まれるｎ型酸化物半導体材料と、ｎ型酸化物半導体層１３に含まれるｎ型酸化物半導体材料とは、同じであってもよく、異なっていてもよい。例えば、ｎ型酸化物半導体層１３に含まれるｎ型酸化物半導体材料が酸化チタンである場合、充電層１４のｎ型酸化物半導体材料は酸化チタンであってもよいし、酸化チタン以外のｎ型酸化物半導体材料であってもよい。 The n-type oxide semiconductor material contained in the charging layer 14 and the n-type oxide semiconductor material contained in the n-type oxide semiconductor layer 13 may be the same or different. For example, when the n-type oxide semiconductor material included in the n-type oxide semiconductor layer 13 is titanium oxide, the n-type oxide semiconductor material of the charge layer 14 may be titanium oxide or n other than titanium oxide. It may be a type oxide semiconductor material.
　例えば、充電層１４は、ｎ型酸化物半導体材料を二酸化チタンとして、酸化シリコンと二酸化チタンとによって形成される。この他に、充電層１４で使用可能なｎ型酸化物半導体材料としては、酸化スズ（ＳｎＯ２）、又は酸化亜鉛（ＺｎＯ）が好適である。二酸化チタン、酸化スズ、及び酸化亜鉛の２つ又は全てを組み合わせた材料を使用することも可能である。 For example, the charge layer 14 is formed of silicon oxide and titanium dioxide using n-type oxide semiconductor material as titanium dioxide. In addition, as the n-type oxide semiconductor material that can be used in the charge layer 14, tin oxide (SnO 2 ) or zinc oxide (ZnO) is suitable. It is also possible to use materials that combine two or all of titanium dioxide, tin oxide, and zinc oxide.
　充電層１４の製造工程について説明する。まず、酸化チタン、酸化スズ、又は酸化亜鉛の前駆体と、シリコーンオイルとの混合物に溶媒を混合した塗布液を用意する。脂肪酸チタンとシリコーンオイルを溶媒に混合した塗布液を用意する。そして、スピン塗布法、スリットコート法等により、塗布液がｎ型酸化物半導体層１３上に塗布される。塗布膜に対して、乾燥、及び焼成を行うことで、ｎ型酸化物半導体層１３上に充電層１４を形成することができる。なお、前駆体の一例として、例えば酸化チタンの前駆体であるチタニウムステアレートが使用できる。酸化チタン、酸化スズ、酸化亜鉛は、金属酸化物の前駆体である脂肪族酸塩から分解して形成される。乾燥、及び焼成した後の、充電層１４に対して、紫外線照射を行いＵＶ硬化させてもよい。 The manufacturing process of the charge layer 14 will be described. First, a coating liquid in which a solvent is mixed with a mixture of a precursor of titanium oxide, tin oxide, or zinc oxide and silicone oil is prepared. A coating solution in which fatty acid titanium and silicone oil are mixed in a solvent is prepared. Then, the coating solution is applied onto the n-type oxide semiconductor layer 13 by a spin coating method, a slit coating method, or the like. The charge layer 14 can be formed on the n-type oxide semiconductor layer 13 by drying and baking the coating film. As an example of the precursor, titanium stearate, which is a precursor of titanium oxide, can be used, for example. Titanium oxide, tin oxide, and zinc oxide are formed by decomposition from an aliphatic acid salt that is a precursor of a metal oxide. The charging layer 14 after drying and firing may be UV-cured by irradiating with ultraviolet rays.
　なお、酸化チタン、酸化スズ、酸化亜鉛等については、前駆体を用いずに、酸化物半導体の微細な粒子を用いることも可能である。酸化チタン、又は酸化亜鉛のナノ粒子をシリコーンオイルと混合することで、混合液が生成される。さらに、混合液に溶媒を混合することで、塗布液が生成される。スピン塗布法、スリットコート法等により、塗布液がｎ型酸化物半導体層１３上に塗布される。塗布膜に対して、乾燥、焼成、及びＵＶ照射を行うことで、充電層１４を形成することができる。 For titanium oxide, tin oxide, zinc oxide, etc., fine particles of an oxide semiconductor can be used without using a precursor. A liquid mixture is produced by mixing nanoparticles of titanium oxide or zinc oxide with silicone oil. Furthermore, a coating liquid is produced | generated by mixing a solvent with a liquid mixture. A coating solution is applied onto the n-type oxide semiconductor layer 13 by a spin coating method, a slit coating method, or the like. The charging layer 14 can be formed by performing drying, baking, and UV irradiation on the coating film.
　充電層１４の上には、ｐ型酸化物半導体層１６が形成されている。ｐ型酸化物半導体層１６は、ｐ型酸化物半導体材料を含んで構成される。ｐ型酸化物半導体層１６の材料としては、酸化ニッケル（ＮｉＯ）、及び銅アルミ酸化物（ＣｕＡｌＯ２）等を使用することが可能である。例えば、ｐ型酸化物半導体層１６は、厚さ４００ｎｍの酸化ニッケル膜となっている。ｐ型酸化物半導体層１６は、蒸着又はスパッタリング等の成膜方法によって、充電層１４の上に成膜されている。 A p-type oxide semiconductor layer 16 is formed on the charging layer 14. The p-type oxide semiconductor layer 16 includes a p-type oxide semiconductor material. As a material of the p-type oxide semiconductor layer 16, nickel oxide (NiO), copper aluminum oxide (CuAlO 2 ), or the like can be used. For example, the p-type oxide semiconductor layer 16 is a nickel oxide film having a thickness of 400 nm. The p-type oxide semiconductor layer 16 is formed on the charging layer 14 by a film formation method such as vapor deposition or sputtering.
　ｐ型酸化物半導体層１６の上には、第２電極１７が形成されている。第２電極１７は、正極として機能する。第２電極１７は、導電膜によって形成されていればよい。また、第２電極１７の材料としては、クロム（Ｃｒ）又は銅（Ｃｕ）等の金属材料を用いることができる。他の金属材料として、アルミニウム（Ａｌ）を含む銀（Ａｇ）合金等がある。その形成方法としては、スパッタリング、イオンプレーティング、電子ビーム蒸着、真空蒸着、化学蒸着等の気相成膜法を挙げることができる。また、金属電極は電解メッキ法、無電解メッキ法等により形成することができる。メッキに使用される金属としては、一般に銅、銅合金、ニッケル、アルミ、銀、金、亜鉛又はスズ等を使用することが可能である。例えば、第２電極１７は、厚さ３００ｎｍのＡｌ膜となっている。 A second electrode 17 is formed on the p-type oxide semiconductor layer 16. The second electrode 17 functions as a positive electrode. The second electrode 17 only needs to be formed of a conductive film. Moreover, as a material of the 2nd electrode 17, metal materials, such as chromium (Cr) or copper (Cu), can be used. As another metal material, there is a silver (Ag) alloy containing aluminum (Al). Examples of the forming method include vapor phase film forming methods such as sputtering, ion plating, electron beam evaporation, vacuum evaporation, and chemical vapor deposition. The metal electrode can be formed by an electrolytic plating method, an electroless plating method, or the like. In general, copper, copper alloy, nickel, aluminum, silver, gold, zinc, tin or the like can be used as a metal used for plating. For example, the second electrode 17 is an Al film having a thickness of 300 nm.
　このように、積層体２０は、基材１１、ｎ型酸化物半導体層１３、充電層１４、ｐ型酸化物半導体層１６、第２電極１７を有している。したがって、シート状電池１０の最表面には、第２電極１７が配置される。 As described above, the stacked body 20 includes the base material 11, the n-type oxide semiconductor layer 13, the charging layer 14, the p-type oxide semiconductor layer 16, and the second electrode 17. Therefore, the second electrode 17 is disposed on the outermost surface of the sheet battery 10.
　上記の説明では、充電層１４の下にｎ型酸化物半導体層１３が配置され、充電層１４の上にｐ型酸化物半導体層１６が配置されている構成としたが、ｎ型酸化物半導体層１３とｐ型酸化物半導体層１６とは反対の配置になっていてもよい。すなわち、充電層１４の上にｎ型酸化物半導体層１３が配置され、下にｐ型酸化物半導体層１６が配置されている構成であってもよい。この場合、基材１１が正極、第２電極１７が負極となる。すなわち、充電層１４がｎ型酸化物半導体層１３とｐ型酸化物半導体層１６に挟まれている構成であれば、充電層１４の上にｎ型酸化物半導体層１３が配置されていても、ｐ型酸化物半導体層１６が配置されていてもよい。換言すると、シート状電池１０は、第１電極（基材１１）、第１酸化物半導体層（ｎ型酸化物半導体層１３、又はｐ型酸化物半導体層１６）、充電層１４、第２酸化物半導体層（ｐ型酸化物半導体層１６、又はｎ型酸化物半導体層１３）、第２電極１７の順番で積層されている構成であればよい。 In the above description, the n-type oxide semiconductor layer 13 is disposed below the charging layer 14 and the p-type oxide semiconductor layer 16 is disposed above the charging layer 14. The layer 13 and the p-type oxide semiconductor layer 16 may be arranged opposite to each other. In other words, the n-type oxide semiconductor layer 13 may be disposed on the charging layer 14 and the p-type oxide semiconductor layer 16 may be disposed below. In this case, the base material 11 is a positive electrode and the second electrode 17 is a negative electrode. In other words, if the charging layer 14 is sandwiched between the n-type oxide semiconductor layer 13 and the p-type oxide semiconductor layer 16, the n-type oxide semiconductor layer 13 may be disposed on the charging layer 14. The p-type oxide semiconductor layer 16 may be disposed. In other words, the sheet battery 10 includes the first electrode (base material 11), the first oxide semiconductor layer (n-type oxide semiconductor layer 13 or p-type oxide semiconductor layer 16), the charging layer 14, the second oxidation. Any structure in which the physical semiconductor layer (p-type oxide semiconductor layer 16 or n-type oxide semiconductor layer 13) and the second electrode 17 are stacked in this order may be used.
　さらに、シート状電池１０は第１電極（基材１１）、第１酸化物半導体層（ｎ型酸化物半導体層１３、又はｐ型酸化物半導体層１６）、充電層１４、第２酸化物半導体層（ｐ型酸化物半導体層１６、又はｎ型酸化物半導体層１３）、第２電極１７以外の層を含む構成であってもよい。 Further, the sheet-like battery 10 includes a first electrode (base material 11), a first oxide semiconductor layer (n-type oxide semiconductor layer 13 or p-type oxide semiconductor layer 16), a charging layer 14, and a second oxide semiconductor. A structure including a layer other than the layer (p-type oxide semiconductor layer 16 or n-type oxide semiconductor layer 13) and the second electrode 17 may be used.
　図１に示す積層体２０において、一部の層が省略されていてもよく、あるいは、他の層が追加されていてもよい。例えば、充電層１４とｐ型酸化物半導体層１６との間に、アルミニウム化合物の層が追加されていてもよい。例えば、アルミニウム化合物は、Ａｌ２Ｏ３（酸化アルミニウム）、ＡｌＮ（アルミナイトライド）、ＡｌＯＮ（酸窒化アルミニウム）、Ａｌ（ＯＨ）３（水酸化アルミニウム）、及びＳｉＡｌＯＮ（シリコン―アルミナ窒化物）のうち少なくとも１つを含むことが好ましい。さらには、ｐ型酸化物半導体層１６と充電層１４との間に水酸化ニッケルを含む層が追加されていてもよい。 In the laminate 20 shown in FIG. 1, some layers may be omitted, or other layers may be added. For example, an aluminum compound layer may be added between the charging layer 14 and the p-type oxide semiconductor layer 16. For example, aluminum compounds are Al 2 O 3 (aluminum oxide), AlN (aluminum nitride), AlON (aluminum oxynitride), Al (OH) 3 (aluminum hydroxide), and SiAlON (silicon-alumina nitride). It is preferable that at least one of them is included. Furthermore, a layer containing nickel hydroxide may be added between the p-type oxide semiconductor layer 16 and the charging layer 14.
（平面構成）
　次に、シート状電池１０の平面構成について説明する。図２は、シート状電池１０の構成を示すＸＹ平面図である。図２に示すように、シート状電池１０は矩形部１０ａとタブ部１０ｂを備えている。矩形部１０ａは、ＸＹ平面視において矩形状になっている部分である。タブ部１０ｂは、矩形部１０ａの＋Ｘ側に突出している。 (Plane configuration)
Next, the planar configuration of the sheet battery 10 will be described. FIG. 2 is an XY plan view showing the configuration of the sheet battery 10. As shown in FIG. 2, the sheet battery 10 includes a rectangular portion 10a and a tab portion 10b. The rectangular portion 10a is a portion that is rectangular in the XY plan view. The tab part 10b protrudes to the + X side of the rectangular part 10a.
　矩形部１０ａに、積層部３１が設けられている。ＸＹ平面視において、積層部３１は、矩形状になっており、積層部３１の外側に周縁部３２が設けられている。積層部３１では、＋Ｚ側において、第２電極１７が露出している（図１を合わせて参照）。周縁部３２では、＋Ｚ側において、基材１１が露出している（図１を合わせて参照）。また、タブ部１０ｂにおいても、＋Ｚ側には、基材１１が露出している。 The laminated part 31 is provided in the rectangular part 10a. In the XY plan view, the laminated portion 31 has a rectangular shape, and a peripheral edge portion 32 is provided outside the laminated portion 31. In the stacked portion 31, the second electrode 17 is exposed on the + Z side (see also FIG. 1). In the peripheral part 32, the base material 11 is exposed on the + Z side (see also FIG. 1). In the tab portion 10b, the base material 11 is exposed on the + Z side.
（積層電池）
　本実施の形態にかかる二次電池は、図１、及び図２に示すようなシート状電池を積層した構成を有している。つまり、二次電池は、２つ以上のシート状電池１０を積層した積層電池となっている。本実施の形態にかかる二次電池１１０の構成について説明する。図３は、二次電池１１０の構成を模式的に示す断面図である。図４、及び図５は二次電池１１０の一部の構成を模式的に示すＸＹ平面図である。 (Laminated battery)
The secondary battery according to the present embodiment has a structure in which sheet batteries as shown in FIGS. 1 and 2 are stacked. That is, the secondary battery is a laminated battery in which two or more sheet batteries 10 are laminated. The configuration of the secondary battery 110 according to the present embodiment will be described. FIG. 3 is a cross-sectional view schematically showing the configuration of the secondary battery 110. 4 and 5 are XY plan views schematically showing a partial configuration of the secondary battery 110.
　図３～図５において、２つのシート状電池の一方を第１シート状電池１１１とし、他方を第２シート状電池１１２とする。第１シート状電池１１１第２シート状電池１１２は、それぞれ図１、及び図２に示す構成を有している。第１シート状電池１１１第２シート状電池１１２とは並列接続されている。 3 to 5, one of the two sheet batteries is a first sheet battery 111, and the other is a second sheet battery 112. The 1st sheet-like battery 111 The 2nd sheet-like battery 112 has the structure shown in FIG. 1 and FIG. 2, respectively. The first sheet battery 111 and the second sheet battery 112 are connected in parallel.
　まず、図３を用いて、二次電池１１０の構成について説明する。図３に示すように、二次電池１１０は、シート状電池１１１と、シート状電池１１２と、第１導電性接着剤１２１と、第２導電性接着剤１２２と、引出電極１２５と、絶縁材１２８とを備えている。 First, the configuration of the secondary battery 110 will be described with reference to FIG. As shown in FIG. 3, the secondary battery 110 includes a sheet battery 111, a sheet battery 112, a first conductive adhesive 121, a second conductive adhesive 122, an extraction electrode 125, and an insulating material. 128.
　二次電池１１０は、第１シート状電池１１１、及び第２シート状電池１１２が積層された構成を備えている。第１シート状電池１１１、及び第２シート状電池１１２の厚さは、例えば、１２μｍとなっている。第１シート状電池１１１及び第２シート状電池１１２は、それぞれ図１で示した積層構造となっているが、適宜簡略化して示している。具体的には、ｎ型酸化物半導体層１３、充電層１４、ｐ型酸化物半導体層１６を省略している。 The secondary battery 110 has a configuration in which a first sheet battery 111 and a second sheet battery 112 are stacked. The thickness of the 1st sheet-like battery 111 and the 2nd sheet-like battery 112 is 12 micrometers, for example. The first sheet-like battery 111 and the second sheet-like battery 112 each have the laminated structure shown in FIG. 1, but are simplified as appropriate. Specifically, the n-type oxide semiconductor layer 13, the charge layer 14, and the p-type oxide semiconductor layer 16 are omitted.
　また、第１シート状電池１１１は、基材１１ａ、及び第２電極１７ａを有しており、これらは、図１、及び図２に示された基材１１、及び第２電極１７に対応している。同様に、第２シート状電池１１２は基材１１ｂ、及び第２電極１７ｂを有しており、これらは、図１、及び図２に示された基材１１、及び第２電極１７に対応している。上記の通り、第１シート状電池１１１と第２シート状電池１１２とは並列接続されている。したがって、基材１１ｂと基材１１ａとが接続され、第２電極１７ａと第２電極１７ｂとが接続される。 The first sheet-like battery 111 includes a base material 11a and a second electrode 17a, which correspond to the base material 11 and the second electrode 17 shown in FIGS. ing. Similarly, the 2nd sheet-like battery 112 has the base material 11b and the 2nd electrode 17b, and these correspond to the base material 11 and the 2nd electrode 17 which were shown by FIG.1 and FIG.2. ing. As described above, the first sheet battery 111 and the second sheet battery 112 are connected in parallel. Therefore, the base material 11b and the base material 11a are connected, and the second electrode 17a and the second electrode 17b are connected.
　第１シート状電池１１１は、矩形部１１１ａとタブ部１１１ｂを有しており、これらは図２に示した矩形部１０ａ、タブ部１０ｂに対応している。第２シート状電池１１２は、矩形部１１２ａとタブ部１１２ｂを有しており、これらは図２に示した矩形部１０ａ、タブ部１０ｂに対応している。 The first sheet-shaped battery 111 has a rectangular portion 111a and a tab portion 111b, which correspond to the rectangular portion 10a and the tab portion 10b shown in FIG. The second sheet-like battery 112 has a rectangular portion 112a and a tab portion 112b, which correspond to the rectangular portion 10a and the tab portion 10b shown in FIG.
　第１シート状電池１１１が－Ｚ側に配置され、第２シート状電池１１２が＋Ｚ側に配置されている。第１シート状電池１１１、及び第２シート状電池１１２は同じ大きさ、及び同じ形状となっている。そして、ＸＹ平面において、矩形部１１１ａと矩形部１１２ａとが重複している。さらに、ＸＹ平面において、タブ部１１１ｂとタブ部１１２ｂとが重複している。 The first sheet battery 111 is disposed on the −Z side, and the second sheet battery 112 is disposed on the + Z side. The first sheet-shaped battery 111 and the second sheet-shaped battery 112 have the same size and the same shape. And the rectangular part 111a and the rectangular part 112a overlap in XY plane. Furthermore, the tab part 111b and the tab part 112b overlap in the XY plane.
　第１シート状電池１１１と第２シート状電池１１２とは、第２電極１７ａ、１７ｂ同士が向かい合うように対向配置されている。第１シート状電池１１１では、第２電極１７ａが＋Ｚ側に配置され、基材１１ａが－Ｚ側に配置されている。反対に、第２シート状電池１１２では、第２電極１７ｂが－Ｚ側に配置され、基材１１ｂが＋Ｚ側に配置されている。つまり、第２シート状電池１１２は、図１に示す積層体２０を上下反転した積層構成となっている。 The first sheet-shaped battery 111 and the second sheet-shaped battery 112 are disposed to face each other so that the second electrodes 17a and 17b face each other. In the first sheet-like battery 111, the second electrode 17a is disposed on the + Z side, and the base material 11a is disposed on the −Z side. On the other hand, in the second sheet-like battery 112, the second electrode 17b is disposed on the −Z side, and the base material 11b is disposed on the + Z side. That is, the second sheet-like battery 112 has a stacked configuration in which the stacked body 20 shown in FIG. 1 is turned upside down.
　第１シート状電池１１１と第２シート状電池１１２との間は、引出電極１２５が配置されている。引出電極１２５は、第１シート状電池１１１の第２電極１７ａと第２シート状電池１１２の第２電極１７ｂとを接続する。引出電極１２５は、例えば金属シートである。引出電極１２５の厚さは、例えば１０μｍとなっている。 Between the first sheet-like battery 111 and the second sheet-like battery 112, an extraction electrode 125 is disposed. The extraction electrode 125 connects the second electrode 17 a of the first sheet battery 111 and the second electrode 17 b of the second sheet battery 112. The extraction electrode 125 is, for example, a metal sheet. The thickness of the extraction electrode 125 is, for example, 10 μm.
　引出電極１２５は、第１シート状電池１１１と第２シート状電池１１２との間から、第１シート状電池１１１、及び第２シート状電池１１２の外側まで引き出されている。具体的には、引出電極１２５は、第１シート状電池１１１と及び第２シート状電池１１２との間から、－Ｘ側に引き出されている。つまり、引出電極１２５は、積層部３１から周縁部３２を通って、第１シート状電池１１１第２シート状電池１１２の外側に引き出されている。引出電極１２５は、Ｘ方向を長手方向、Ｙ方向を短手方向とする長方形状になっている金属シートである（図４を合わせて参照）。 The extraction electrode 125 is drawn from between the first sheet battery 111 and the second sheet battery 112 to the outside of the first sheet battery 111 and the second sheet battery 112. Specifically, the extraction electrode 125 is extracted to the −X side from between the first sheet battery 111 and the second sheet battery 112. That is, the extraction electrode 125 is extracted from the laminated portion 31 through the peripheral edge portion 32 to the outside of the first sheet battery 111 and the second sheet battery 112. The extraction electrode 125 is a metal sheet having a rectangular shape in which the X direction is the longitudinal direction and the Y direction is the short direction (see also FIG. 4).
　引出電極１２５と第１シート状電池１１１との間には、第１導電性接着剤１２１が配置されている。引出電極１２５と第１シート状電池１１１の第２電極１７ａは、第１導電性接着剤１２１を介して電気的に接続される。第１導電性接着剤１２１の厚さは、例えば、１０μｍとなっている。 A first conductive adhesive 121 is disposed between the extraction electrode 125 and the first sheet battery 111. The extraction electrode 125 and the second electrode 17 a of the first sheet battery 111 are electrically connected via the first conductive adhesive 121. The thickness of the first conductive adhesive 121 is, for example, 10 μm.
　引出電極１２５と第２シート状電池１１２との間には、第２導電性接着剤１２２が配置されている。引出電極１２５と第２シート状電池１１２の第２電極１７ｂは、第１導電性接着剤１２１を介して電気的に接続される。第２導電性接着剤１２２の厚さは、例えば、１０μｍとなっている。 A second conductive adhesive 122 is disposed between the extraction electrode 125 and the second sheet battery 112. The extraction electrode 125 and the second electrode 17 b of the second sheet battery 112 are electrically connected via the first conductive adhesive 121. The thickness of the second conductive adhesive 122 is, for example, 10 μm.
　引出電極１２５は、第２シート状電池１１２の第２電極１７ａを第２シート状電池１１２の第２電極１７ｂと電気的に接続する。また、第１シート状電池１１１のタブ部１１１ｂと第２シート状電池１１２のタブ部１１２ｂとが接続される。タブ部１１１ｂで、基材１１ａが露出し、タブ部１１２ｂでは基材１１ｂが露出している。よって、タブ部１１１ｂ、１１２ｂが重複する箇所において、第１電極である基材１１ａ、基材１１ｂ同士が向かい合うに配置されている。 The extraction electrode 125 electrically connects the second electrode 17 a of the second sheet battery 112 to the second electrode 17 b of the second sheet battery 112. Moreover, the tab part 111b of the 1st sheet-like battery 111 and the tab part 112b of the 2nd sheet-like battery 112 are connected. The base material 11a is exposed at the tab portion 111b, and the base material 11b is exposed at the tab portion 112b. Therefore, in the location where the tab parts 111b and 112b overlap, the base material 11a and the base material 11b, which are the first electrodes, are arranged to face each other.
　これにより、第１シート状電池１１１と第２シート状電池１１２とが並列接続される。なお、タブ部１１１ｂとタブ部１１２ｂとの接続は、圧着、又は超音波溶接などを用いることができる。あるいは、導電性接着剤を用いて、タブ部１１１ｂとタブ部１１２ｂとを接続してもよい。このように、第１シート状電池１１１のタブ部１１１ｂと第２シート状電池１１２のタブ部１１２ｂとが重複している。よって、第１電極となる基材１１ａ、１１ｂを容易に接続することができる。 Thereby, the first sheet battery 111 and the second sheet battery 112 are connected in parallel. Note that the tab portion 111b and the tab portion 112b can be connected by crimping or ultrasonic welding. Alternatively, the tab portion 111b and the tab portion 112b may be connected using a conductive adhesive. Thus, the tab part 111b of the 1st sheet-like battery 111 and the tab part 112b of the 2nd sheet-like battery 112 overlap. Therefore, the base materials 11a and 11b to be the first electrodes can be easily connected.
　また、－Ｘ側の周縁部３２において、引出電極１２５の周りには、絶縁材１２８が設けられている。絶縁材１２８は、第１シート状電池１１１と引出電極１２５との間に配置される。さらに、絶縁部材１２８は第２シート状電池１１２と引出電極１２５との間に配置される。絶縁部材１２８は、基材１１ａ、１１ｂが露出する箇所であって、基材１１ａ、１１ｂが引出電極１２５と対向する箇所に配置されている。換言すると、周縁部３２と引出電極１２５とが向かい合う箇所には、絶縁材１２８が配置される。周縁部３２に対応する位置において、引出電極１２５に絶縁材１２８を塗布することで、第１電極である基材１１ａ、及び基材１１ｂが引出電極１２５と短絡するのを防ぐことができる。 Further, an insulating material 128 is provided around the extraction electrode 125 in the peripheral portion 32 on the −X side. The insulating material 128 is disposed between the first sheet battery 111 and the extraction electrode 125. Further, the insulating member 128 is disposed between the second sheet battery 112 and the extraction electrode 125. The insulating member 128 is disposed at a position where the base materials 11 a and 11 b are exposed and the base materials 11 a and 11 b are opposed to the extraction electrode 125. In other words, the insulating material 128 is disposed at a location where the peripheral edge portion 32 and the extraction electrode 125 face each other. By applying the insulating material 128 to the extraction electrode 125 at a position corresponding to the peripheral edge portion 32, it is possible to prevent the base material 11 a and the base material 11 b that are the first electrodes from being short-circuited with the extraction electrode 125.
　絶縁材１２８は引出電極１２５の一部を覆うように形成されている。あるいは、絶縁材１２８は、基材１１ａ、１１ｂ上に塗布されていてもよい。絶縁材１２８は、蒸着又はスプレー塗布などにより、コーティングされている。絶縁材１２８としては、例えば、ポリイミドなどの樹脂膜を用いることができる。絶縁材１２８は、弾性を有していることが好ましい。絶縁材１２８の厚さは、１０μｍとなっている。 The insulating material 128 is formed so as to cover a part of the extraction electrode 125. Or the insulating material 128 may be apply | coated on the base materials 11a and 11b. The insulating material 128 is coated by vapor deposition or spray application. As the insulating material 128, for example, a resin film such as polyimide can be used. The insulating material 128 preferably has elasticity. The thickness of the insulating material 128 is 10 μm.
　次に、第２導電性接着剤１２２の配置について、図４を用いて説明する。図４は、二次電池１１０の一部の構成を示すＸＹ平面図である。より具体的には、図４は、第２シート状電池１１２を取り除いた二次電池１１０の構成を示す上面図となっている。 Next, the arrangement of the second conductive adhesive 122 will be described with reference to FIG. FIG. 4 is an XY plan view showing a partial configuration of the secondary battery 110. More specifically, FIG. 4 is a top view showing the configuration of the secondary battery 110 with the second sheet battery 112 removed.
　図４に示すように、引出電極１２５の上には、複数の第２導電性接着剤１２２が配置されている。１０個の第２導電性接着剤１２２が千鳥配置に設けられている。ここでは、第２導電性接着剤１２２が２列に配置されている。各列には、５個の第２導電性接着剤１２２が設けられている。＋Ｙ側の列を１列目とし、－Ｙ側の列を２列目とする。 As shown in FIG. 4, a plurality of second conductive adhesives 122 are arranged on the extraction electrode 125. Ten second conductive adhesives 122 are provided in a staggered arrangement. Here, the second conductive adhesives 122 are arranged in two rows. In each row, five second conductive adhesives 122 are provided. The + Y side column is the first column and the -Y side column is the second column.
　１列目の第２導電性接着剤１２２と、２列目の第２導電性接着剤１２２とのＸ方向の位置がずれている。具体的には、－Ｘ側から＋Ｘ側に向かうにつれて、２列目の第２導電性接着剤１２２を先頭として、２列目の第２導電性接着剤１２２と、１列目の第２導電性接着剤１２２とが１個ずつ交互に並んでいる。 The positions of the second conductive adhesive 122 in the first row and the second conductive adhesive 122 in the second row are shifted in the X direction. Specifically, from the −X side to the + X side, the second conductive adhesive 122 in the second column and the second conductive adhesive in the first column, starting from the second conductive adhesive 122 in the second column. The adhesives 122 are alternately arranged one by one.
　次に、第１導電性接着剤１２１の配置について、図５を用いて説明する。図４は、二次電池１１０の一部の構成を示すＸＹ平面図である。より具体的には、図４は、第２シート状電池１１２、引出電極１２５、及び絶縁部材１２８を取り除いた二次電池１１０の構成を示す上面図となっている。 Next, the arrangement of the first conductive adhesive 121 will be described with reference to FIG. FIG. 4 is an XY plan view showing a partial configuration of the secondary battery 110. More specifically, FIG. 4 is a top view showing the configuration of the secondary battery 110 from which the second sheet battery 112, the extraction electrode 125, and the insulating member 128 are removed.
　図５に示すように、第１シート状電池１１１の第２電極１７ａの上には、複数の第１導電性接着剤１２１が配置されている。図５では、１０個の第１導電性接着剤１２１が千鳥配置に設けられている。ここでは、第１導電性接着剤１２１が２列に配置されている。各列には、５個の第１導電性接着剤１２１が設けられている。＋Ｙ側の列を１列目とし、－Ｙ側の列を２列目とする。 As shown in FIG. 5, a plurality of first conductive adhesives 121 are disposed on the second electrode 17 a of the first sheet battery 111. In FIG. 5, ten first conductive adhesives 121 are provided in a staggered arrangement. Here, the first conductive adhesives 121 are arranged in two rows. In each row, five first conductive adhesives 121 are provided. The + Y side column is the first column and the -Y side column is the second column.
　１列目の第１導電性接着剤１２１と、２列目の第１導電性接着剤１２１とのＸ方向の位置がずれている。具体的には、－Ｘ側から＋Ｘ側に向かうにつれて、１列目の第１導電性接着剤１２１を先頭として、１列目の第１導電性接着剤１２１と、２列目の第１導電性接着剤１２１とが１個ずつ交互に並んでいる。 The positions of the first conductive adhesive 121 in the first row and the first conductive adhesive 121 in the second row are shifted in the X direction. Specifically, from the −X side to the + X side, the first conductive adhesive 121 in the first row and the first conductive adhesive 121 in the second row starting from the first conductive adhesive 121 in the first row. The adhesives 121 are alternately arranged one by one.
　図６は、ＸＹ平面における第１導電性接着剤１２１と第２導電性接着剤１２２とを配置を模式的に示す上面図である。図６では、引出電極１２５、及び第２シート状電池１１２が省略されている。図６に示すように、ＸＹ平面視において、第１導電性接着剤１２１と第２導電性接着剤１２２とがずれて配置されている。具体的には、第１導電性接着剤１２１は第２導電性接着剤１２２と重複しないように配置されている。さらに、第２導電性接着剤１２２は、第１導電性接着剤１２１と重複しないように配置されている。 FIG. 6 is a top view schematically showing the arrangement of the first conductive adhesive 121 and the second conductive adhesive 122 in the XY plane. In FIG. 6, the extraction electrode 125 and the second sheet battery 112 are omitted. As shown in FIG. 6, the first conductive adhesive 121 and the second conductive adhesive 122 are arranged so as to be shifted in the XY plan view. Specifically, the first conductive adhesive 121 is disposed so as not to overlap with the second conductive adhesive 122. Further, the second conductive adhesive 122 is disposed so as not to overlap with the first conductive adhesive 121.
　１列目の配置では、－Ｘ側から＋Ｘ側に向かうにつれて、第１導電性接着剤１２１を先頭として、第１導電性接着剤１２１と第２導電性接着剤１２２とが１個ずつ交互に配置されている。２列目では、－Ｘ側から＋Ｘ側に向かうにつれて、第２導電性接着剤１２２を先頭として、第２導電性接着剤１２２と第１導電性接着剤１２１とが１個ずつ交互に配置されている。 In the arrangement in the first row, the first conductive adhesive 121 and the second conductive adhesive 122 are alternately placed one by one from the −X side toward the + X side, starting with the first conductive adhesive 121. Has been placed. In the second row, the second conductive adhesive 122 and the first conductive adhesive 121 are alternately arranged one by one from the −X side toward the + X side, starting with the second conductive adhesive 122. ing.
　このように、ＸＹ平面視において、第１導電性接着剤１２１と第２導電性接着剤１２２とを重複しないように配置されている。つまり、ＸＹ平面視において、第１導電性接着剤１２１と第２導電性接着剤１２２とを重複しないように配置されている。このようにすることで、二次電池１１０の厚さの増加を防ぐことができる。 Thus, in the XY plan view, the first conductive adhesive 121 and the second conductive adhesive 122 are arranged so as not to overlap. That is, in the XY plan view, the first conductive adhesive 121 and the second conductive adhesive 122 are arranged so as not to overlap. By doing in this way, the increase in the thickness of the secondary battery 110 can be prevented.
　図７は、比較例にかかる二次電池１１０Ａの積層構造を模式的に示す断面図である。図７では、引出電極１２５と第１シート状電池１１１との間に導電性テープ１５１が設けられている。また、引出電極１２５と第２シート状電池１１２の間に、導電性テープ１５２が設けられている。導電性テープ１５１と導電性テープ１５２は重複して配置されている。 FIG. 7 is a cross-sectional view schematically showing a laminated structure of the secondary battery 110A according to the comparative example. In FIG. 7, a conductive tape 151 is provided between the extraction electrode 125 and the first sheet battery 111. In addition, a conductive tape 152 is provided between the extraction electrode 125 and the second sheet battery 112. The conductive tape 151 and the conductive tape 152 are overlapped.
　例えば、導電性テープ１５１、１５２の厚さは、それぞれ２５μｍである。図７の比較例では、導電性テープ１５１、１５２が重複しているため、２枚分の導電性テープ１５１、１５２の厚さ（５０μｍ）が増加する。 For example, the thickness of each of the conductive tapes 151 and 152 is 25 μm. In the comparative example of FIG. 7, since the conductive tapes 151 and 152 overlap, the thickness (50 μm) of the two conductive tapes 151 and 152 increases.
　本実施の形態では、第１導電性接着剤１２１と第２導電性接着剤１２２とが重なっていない。したがって、二次電池１１０の全体の厚さは、導電性接着剤１２１、又は第２導電性接着剤１２２の一方の厚さ（１０μｍ）分しか増加しない。本実施の形態によれば、図７の構成に比べて、二次電池１１０の厚さを４０（＝５０―１０）μｍ薄くすることができる。 In the present embodiment, the first conductive adhesive 121 and the second conductive adhesive 122 do not overlap. Therefore, the total thickness of the secondary battery 110 increases only by one thickness (10 μm) of the conductive adhesive 121 or the second conductive adhesive 122. According to the present embodiment, the thickness of the secondary battery 110 can be reduced by 40 (= 50-10) μm compared to the configuration of FIG.
　このように、本実施の形態では、第１導電性接着剤１２１と第２導電性接着剤１２２とがずれて配置されている。このため、導電性接着剤が重なることによる厚さの増加を防ぐことができ、二次電池１１０を薄型化することができる。 Thus, in the present embodiment, the first conductive adhesive 121 and the second conductive adhesive 122 are arranged so as to be shifted. For this reason, an increase in thickness due to the overlapping of the conductive adhesive can be prevented, and the secondary battery 110 can be thinned.
　また、ＸＹ平面視において、第１導電性接着剤１２１と第２導電性接着剤１２２とを千鳥配置とすることで、接着箇所を分散させることができる。図６に示すように、Ｘ方向に沿って、第１導電性接着剤１２１と第２導電性接着剤１２２とが交互に配置されている。第１シート状電池１１１、及び第２シート状電池１１２を確実に接着させることでき、第１シート状電池１１１、及び第２シート状電池１１２の剥がれをふせぐことができる。 In addition, in the XY plan view, the first conductive adhesive 121 and the second conductive adhesive 122 are arranged in a staggered manner, whereby the bonded portions can be dispersed. As shown in FIG. 6, the first conductive adhesive 121 and the second conductive adhesive 122 are alternately arranged along the X direction. The 1st sheet-like battery 111 and the 2nd sheet-like battery 112 can be adhere | attached reliably, and peeling of the 1st sheet-like battery 111 and the 2nd sheet-like battery 112 can be prevented.
　次に、本実施の形態にかかる二次電池１１０の製造方法について、図８を用いて説明する。図８は、二次電池１１０の製造方法を示すフローチャートである。なお、第１電極となる基材１１ａ、及び基材１１ｂの接続方法は、特に限定されないため、省略されている。 Next, a method for manufacturing the secondary battery 110 according to the present embodiment will be described with reference to FIG. FIG. 8 is a flowchart showing a method for manufacturing the secondary battery 110. In addition, since the connection method of the base material 11a used as the 1st electrode and the base material 11b is not specifically limited, it is abbreviate | omitted.
　まず、第１シート状電池１１１の第２電極１７ａ上に第１導電性接着剤１２１を塗布する（Ｓ１１）。例えば、ディスペンサが、第１導電性接着剤１２１を所定の大きさ、及び所定の位置に塗布する。ここでは、ディスペンサが塗布量、及び塗布位置を制御している。ここでは、ＸＹ平面視において、第１導電性接着剤１２１が直径０．６４μｍの円形となるように、ディスペンサが第１導電性接着剤１２１を第２電極１７ａの上面に塗布する。これにより、図５に示す構成となる。 First, the first conductive adhesive 121 is applied on the second electrode 17a of the first sheet battery 111 (S11). For example, the dispenser applies the first conductive adhesive 121 to a predetermined size and a predetermined position. Here, the dispenser controls the application amount and the application position. Here, in the XY plan view, the dispenser applies the first conductive adhesive 121 to the upper surface of the second electrode 17a so that the first conductive adhesive 121 has a circular shape with a diameter of 0.64 μm. As a result, the configuration shown in FIG. 5 is obtained.
　次に、第１導電性接着剤１２１を介して、第１シート状電池１１１に引出電極１２５を貼り付ける（Ｓ１２）。具体的には、引出電極１２５を第１シート状電池１１１に向けて押圧する。これにより、第１導電性接着剤１２１が第１シート状電池１１１に押しつけられて、変形する。第１導電性接着剤１２１に引出電極１２５が接続され、引出電極１２５が第１シート状電池１１１に貼り合わせられる。よって、第１シート状電池１１１の第２電極１７ａと引出電極１２５とが第１導電性接着剤１２１を介して、接続される。 Next, the extraction electrode 125 is attached to the first sheet-like battery 111 through the first conductive adhesive 121 (S12). Specifically, the extraction electrode 125 is pressed toward the first sheet battery 111. As a result, the first conductive adhesive 121 is pressed against the first sheet battery 111 and deformed. An extraction electrode 125 is connected to the first conductive adhesive 121, and the extraction electrode 125 is bonded to the first sheet battery 111. Therefore, the second electrode 17 a and the extraction electrode 125 of the first sheet battery 111 are connected via the first conductive adhesive 121.
　ＸＹ平面視において、変形後の第１導電性接着剤１２１は例えば、直径１．５ｍｍの円形となる。また、変形後の第１導電性接着剤１２１の厚さ（高さ）は、例えば、１０μｍである。第１導電性接着剤１２１を硬化させることで、引出電極１２５を第１シート状電池１１１に固定することができる。 In the XY plan view, the deformed first conductive adhesive 121 is, for example, a circle having a diameter of 1.5 mm. Further, the thickness (height) of the first conductive adhesive 121 after deformation is, for example, 10 μm. The extraction electrode 125 can be fixed to the first sheet battery 111 by curing the first conductive adhesive 121.
　次に、引出電極１２５の上に第２導電性接着剤１２２を塗布する（Ｓ１３）。Ｓ１１で用いられたディスペンサが、第２導電性接着剤１２２を引出電極１２５の上面に塗布する。ここでは、ＸＹ平面視において、第２導電性接着剤１２２が第１導電性接着剤１２１と重ならないように配置される（図６を合わせて参照）。これにより、図４に示す構成となる。第２導電性接着剤１２２の塗布サイズは、第１導電性接着剤１２１は同様に、直径０．６４μｍの円形となっている。 Next, the second conductive adhesive 122 is applied on the extraction electrode 125 (S13). The dispenser used in S11 applies the second conductive adhesive 122 to the upper surface of the extraction electrode 125. Here, the second conductive adhesive 122 is disposed so as not to overlap the first conductive adhesive 121 in the XY plan view (see also FIG. 6). As a result, the configuration shown in FIG. 4 is obtained. As for the application size of the second conductive adhesive 122, the first conductive adhesive 121 is similarly circular with a diameter of 0.64 μm.
　そして、引出電極１２５に、第２シート状電池１１２を貼り付ける（Ｓ１４）。第２シート状電池１１２を第１シート状電池１１１に向けて押圧する。これにより、第２導電性接着剤１２２が、第１シート状電池１１１に押しつけられて、変形する。第２導電性接着剤１２２に引出電極１２５が接続され、第２シート状電池１１２が第１シート状電池１１１上の引出電極１２５に貼り合わせられる。よって、第２導電性接着剤１２２の第２電極１７ｂと引出電極１２５とが第２導電性接着剤１２２を介して、接続される。 And the 2nd sheet-like battery 112 is affixed on the extraction electrode 125 (S14). The second sheet battery 112 is pressed toward the first sheet battery 111. Accordingly, the second conductive adhesive 122 is pressed against the first sheet battery 111 and deformed. The extraction electrode 125 is connected to the second conductive adhesive 122, and the second sheet battery 112 is bonded to the extraction electrode 125 on the first sheet battery 111. Therefore, the second electrode 17 b of the second conductive adhesive 122 and the extraction electrode 125 are connected via the second conductive adhesive 122.
　ＸＹ平面視において、変形後の第２シート状電池１１２のサイズは第１導電性接着剤１２１と同様に、１．５μｍ程度となっている。第２導電性接着剤１２２を硬化させることで、引出電極１２５に第２シート状電池１１２を固定することができる。 In the XY plan view, the size of the deformed second sheet battery 112 is about 1.5 μm, similar to the first conductive adhesive 121. The second sheet-like battery 112 can be fixed to the extraction electrode 125 by curing the second conductive adhesive 122.
　このように一対のシート状電池１１１、１１２が積層された二次電池１１０が完成する。第１シート状電池１１１と第２シート状電池１１２が向かい合って配置された状態の平面視した場合に、第１導電性接着剤１２１及び第２導電性接着剤１２２がずれて配置されている。よって、薄型の二次電池１１０を製造することができる。 Thus, the secondary battery 110 in which the pair of sheet batteries 111 and 112 are stacked is completed. The first conductive adhesive 121 and the second conductive adhesive 122 are shifted from each other when viewed in a plan view in a state where the first sheet battery 111 and the second sheet battery 112 are arranged to face each other. Therefore, the thin secondary battery 110 can be manufactured.
実施の形態２．
　本実施の形態では、実施の形態１で示した構成の二次電池１１０をさらに積層している。具体的には、一対のシート状電池を有する二次電池１１０をシート状電池ペアとして、複数のシート状電池ペアを積層している。そのため、シート状電池ペアの説明に付いては適宜省略する。 Embodiment 2. FIG.
In this embodiment, the secondary battery 110 having the structure shown in Embodiment 1 is further stacked. Specifically, the secondary battery 110 having a pair of sheet batteries is used as a sheet battery pair, and a plurality of sheet battery pairs are stacked. Therefore, the description of the sheet-like battery pair will be omitted as appropriate.
　本実施の形態にかかる積層電池２００について、図９，図１０を用いて説明する。図９は、積層電池２００の構成を示す断面図である。図１０は、各層における導電性接着剤の配置を説明するための模式図である。本実施の形態では、実施の形態１の二次電池１１０を積層している。具体的には、二次電池１１０をシート状電池ペアとして並列接続している。このようにすることで、大容量の二次電池を提供することができる。 The laminated battery 200 according to the present embodiment will be described with reference to FIGS. FIG. 9 is a cross-sectional view showing the configuration of the laminated battery 200. FIG. 10 is a schematic diagram for explaining the arrangement of the conductive adhesive in each layer. In this embodiment, the secondary battery 110 of Embodiment 1 is stacked. Specifically, the secondary battery 110 is connected in parallel as a sheet-like battery pair. By doing in this way, a large capacity secondary battery can be provided.
　積層電池２００は、５つのシート状電池ペア２０１～２０５を有している。シート状電池ペア２０１～２０５のそれぞれは、実施の形態１で示した二次電池１１０に対応している。よって、積層電池２００は、５層のシート状電池ペア２０１～２０５によって構成されている。 The laminated battery 200 has five sheet-like battery pairs 201-205. Each of the sheet-like battery pairs 201 to 205 corresponds to the secondary battery 110 shown in the first embodiment. Therefore, the laminated battery 200 is constituted by five layers of sheet-like battery pairs 201 to 205.
　第１導電性接着剤１２１、及び第２導電性接着剤１２２の配置が技術的特徴の一つとなっている。シート状電池ペア２０１～２０５の基本的な構成は、実施の形態１で示した二次電池１１０と同様であるため、説明を省略する。 The arrangement of the first conductive adhesive 121 and the second conductive adhesive 122 is one of the technical features. Since the basic configuration of the sheet-like battery pairs 201 to 205 is the same as that of the secondary battery 110 shown in Embodiment 1, the description thereof is omitted.
　－Ｘ側から順番に、シート状電池ペア２０１、シート状電池ペア２０２、シート状電池ペア２０３、シート状電池ペア２０４、及びシート状電池ペア２０５が積層されている。シート状電池ペア２０１に含まれる２つのシート状電池を第１シート状電池２１１ａ、第２シート状電池２１２ａとする。第１シート状電池２１１ａが、実施の形態１の第１シート状電池１１１に対応し、第２シート状電池２１２ａが第２シート状電池１１２に対応する。 The sheet-like battery pair 201, the sheet-like battery pair 202, the sheet-like battery pair 203, the sheet-like battery pair 204, and the sheet-like battery pair 205 are stacked in order from the -X side. Two sheet batteries included in the sheet battery pair 201 are referred to as a first sheet battery 211a and a second sheet battery 212a. The first sheet battery 211a corresponds to the first sheet battery 111 of the first embodiment, and the second sheet battery 212a corresponds to the second sheet battery 112.
　シート状電池ペア２０２に含まれる２つのシート状電池を第１シート状電池２１１ｂ、第２シート状電池２１２ｂとする。シート状電池ペア２０３に含まれる２つのシート状電池を第１シート状電池２１１ｃ、第２シート状電池２１２ｃとする。シート状電池ペア２０４に含まれる２つのシート状電池を第１シート状電池２１１ｄ、第２シート状電池２１２ｄとする。シート状電池ペア２０５に含まれる２つのシート状電池を第１シート状電池２１１ｅ、第２シート状電池２１２ｅとする。 The two sheet batteries included in the sheet battery pair 202 are referred to as a first sheet battery 211b and a second sheet battery 212b. The two sheet batteries included in the sheet battery pair 203 are referred to as a first sheet battery 211c and a second sheet battery 212c. The two sheet batteries included in the sheet battery pair 204 are referred to as a first sheet battery 211d and a second sheet battery 212d. The two sheet batteries included in the sheet battery pair 205 are a first sheet battery 211e and a second sheet battery 212e.
　このように、積層電池２００は、５枚のシート状電池２１１ａ～２１１ｅと５枚のシート状電池２１２ａ～２１２ｅとを備えている。よって、積層電池２００では、１０枚のシート状電池２１１ａ～２１１ｅ、２１２ａ～２１２ｅが積層されている。 As described above, the laminated battery 200 includes the five sheet-like batteries 211a to 211e and the five sheet-like batteries 212a to 212e. Therefore, in the laminated battery 200, ten sheet-like batteries 211a to 211e and 212a to 212e are laminated.
　実施の形態１で示したように、シート状電池ペア２０１～２０５のそれぞれにおいて、第２電極同士が向かい合うように配置されている。よって、隣接する２つのシート状電池ペアでは、第１電極である基材同士が向かい合うように配置されている。 As shown in Embodiment 1, in each of the sheet-like battery pairs 201 to 205, the second electrodes are arranged so as to face each other. Therefore, in the two adjacent sheet-like battery pairs, the base materials that are the first electrodes are arranged so as to face each other.
　シート状電池２０１～２０５に含まれる引出電極をそれぞれ引出電極１２５ａ～１２５ｅとする。同様に、シート状電池２０１～２０５に含まれる第１導電性接着剤をそれぞれ第１導電性接着剤１２１ａ～１２１ｅとする。さらに同様にシート状電池２０１～２０５に含まれる第２導電性接着剤をそれぞれ第２導電性接着剤１２２ａ～１２２ｅとする。ＸＹ平面視において、引出電極１２５ａ～１２５ｅは、互いに重複するように配置されている。 The extraction electrodes included in the sheet batteries 201 to 205 are referred to as extraction electrodes 125a to 125e, respectively. Similarly, the first conductive adhesives included in the sheet batteries 201 to 205 are referred to as first conductive adhesives 121a to 121e, respectively. Similarly, the second conductive adhesives included in the sheet batteries 201 to 205 are referred to as second conductive adhesives 122a to 122e, respectively. In the XY plan view, the extraction electrodes 125a to 125e are arranged so as to overlap each other.
　図１０に示すように、シート状電池２０１は、４つの第１導電性接着剤１２１ａと４つの第２導電性接着剤１２２ａとを備えている。４つの第１導電性接着剤１２１ａと４つの第２導電性接着剤１２２ａとは千鳥配置となっている。同様に、シート状電池２０２は、４つの第１導電性接着剤１２１ｂと４つの第２導電性接着剤１２２ｂとを備えている。４つの第１導電性接着剤１２１ｂと４つの第２導電性接着剤１２２ｂとは千鳥配置となっている。 As shown in FIG. 10, the sheet battery 201 includes four first conductive adhesives 121a and four second conductive adhesives 122a. The four first conductive adhesives 121a and the four second conductive adhesives 122a are staggered. Similarly, the sheet-like battery 202 includes four first conductive adhesives 121b and four second conductive adhesives 122b. The four first conductive adhesives 121b and the four second conductive adhesives 122b are staggered.
　シート状電池２０３は、４つの第１導電性接着剤１２１ｃと４つの第２導電性接着剤１２２ｃとを備えている。４つの第１導電性接着剤１２１ｃと４つの第２導電性接着剤１２２ｃとは千鳥配置となっている。シート状電池２０４は、４つの第１導電性接着剤１２１ｄと４つの第２導電性接着剤１２２ｄとを備えている。４つの第１導電性接着剤１２１ｄと４つの第２導電性接着剤１２２ｄとは千鳥配置となっている。シート状電池２０５は、４つの第１導電性接着剤１２１ｅと４つの第２導電性接着剤１２２ｅとを備えている。４つの第１導電性接着剤１２１ｅと４つの第２導電性接着剤１２２ｅとは千鳥配置となっている。 The sheet-like battery 203 includes four first conductive adhesives 121c and four second conductive adhesives 122c. The four first conductive adhesives 121c and the four second conductive adhesives 122c are staggered. The sheet battery 204 includes four first conductive adhesives 121d and four second conductive adhesives 122d. The four first conductive adhesives 121d and the four second conductive adhesives 122d are staggered. The sheet battery 205 includes four first conductive adhesives 121e and four second conductive adhesives 122e. The four first conductive adhesives 121e and the four second conductive adhesives 122e are staggered.
　図１１は、ＸＹ平面視における第１導電性接着剤１２１ａ～１２１ｅと第２導電性接着剤１２２ａ～１２２ｅの全てを示す図である。図１１に示すように、第１導電性接着剤１２１ａ～１２１ｅと第２導電性接着剤１２２ａ～１２２ｅは、２列に形成されている。そして、各列に２０個の導電性接着剤が配置されている。 FIG. 11 is a diagram showing all of the first conductive adhesives 121a to 121e and the second conductive adhesives 122a to 122e in the XY plan view. As shown in FIG. 11, the first conductive adhesives 121a to 121e and the second conductive adhesives 122a to 122e are formed in two rows. Then, 20 conductive adhesives are arranged in each row.
　そして、ＸＹ平面視において、第１導電性接着剤１２１ａ～１２１ｅと第２導電性接着剤１２２ａ～１２２ｅはそれぞれ、ずれて配置されている。つまり、ＸＹ平面視において、４０個の導電性接着剤が全てずれて配置されている。例えば、第１導電性接着剤１２１ａは、第１導電性接着剤１２１ｂ～１２１ｅ、及び第２導電性接着剤１２２ａ～１２２ｅのいずれとも重複しないように配置されている。 In the XY plan view, the first conductive adhesives 121a to 121e and the second conductive adhesives 122a to 122e are displaced from each other. That is, in the XY plan view, all 40 conductive adhesives are arranged so as to be shifted. For example, the first conductive adhesive 121a is disposed so as not to overlap any of the first conductive adhesives 121b to 121e and the second conductive adhesives 122a to 122e.
　つまり、ＸＹ平面視において、第１導電性接着剤１２１ａ～１２１ｅと第２導電性接着剤１２２ａ～１２２ｅのいずれの導電性接着剤が、他のシート状電池ペアの導電性接着剤からずれて配置されている。このように、第１導電性接着剤１２１ａ～１２１ｅと第２導電性接着剤１２２ａ～１２２ｅの全てが重ならないように配置することで、積層電池２００の厚さの増加を防ぐことができる。 That is, in the XY plan view, any one of the first conductive adhesives 121a to 121e and the second conductive adhesives 122a to 122e is displaced from the conductive adhesives of the other sheet-like battery pairs. Has been. Thus, by arranging the first conductive adhesives 121a to 121e and the second conductive adhesives 122a to 122e so as not to overlap, an increase in the thickness of the multilayer battery 200 can be prevented.
　図９、図１０に示す積層電池２００を製造する製造方法について説明する。まず、実施の形態１の図８等で示した製造方法によって、複数の二次電池１１０を用意する。上記の通り、二次電池１１０がシート状電池ペアとなっている。そして、複数のシート状電池ペアを重ね合わせていく。このとき、隣接するシート状電池ペアにおいて、第１電極（基材）同士が向かい合うように、シート状電池ペアが積層される。そして、隣接するシート状電池ペア間において、第１電極同士を接続するとともに、引出電極１２５同士を接続する。なお、第１電極はタブ部において接続することができる。これにより、薄型、かつ、高い性能の積層電池を製造することができる。 A manufacturing method for manufacturing the laminated battery 200 shown in FIGS. 9 and 10 will be described. First, a plurality of secondary batteries 110 are prepared by the manufacturing method shown in FIG. As described above, the secondary battery 110 is a sheet battery pair. Then, a plurality of sheet-like battery pairs are stacked. At this time, in the adjacent sheet-shaped battery pairs, the sheet-shaped battery pairs are laminated so that the first electrodes (base materials) face each other. And between adjacent sheet-like battery pairs, while connecting 1st electrodes, the extraction electrodes 125 are connected. The first electrode can be connected at the tab portion. Thereby, a thin and high performance laminated battery can be manufactured.
　以上、本発明の実施形態の一例を説明したが、本発明はその目的と利点を損なうことのない適宜の変形を含み、更に、上記の実施形態による限定は受けない。 As mentioned above, although an example of embodiment of this invention was demonstrated, this invention includes the appropriate deformation | transformation which does not impair the objective and advantage, Furthermore, the limitation by said embodiment is not received.
　この出願は、２０１８年５月３１日に出願された日本出願特願２０１８－１０４８４８を基礎とする優先権を主張し、その開示の全てをここに取り込む。 This application claims priority based on Japanese Patent Application No. 2018-104848 filed on May 31, 2018, the entire disclosure of which is incorporated herein.
　１０　シート状電池
　１１　基材
　１３　ｎ型酸化物半導体層
　１４　充電層
　１６　ｐ型酸化物半導体層
　１７　第２電極
　２０　積層体
　３１　積層部
　３２　周縁部
　１１１　第１シート状電池
　１１２　第２シート状電池
　１２１　第１導電性接着剤
　１２２　第２導電性接着剤
　１２５　引出電極
　１２８　絶縁材
　２００　積層電池
　２０１～２０５　シート状電池ペア
　２１１ａ～２１１ｅ　第１シート状電池
　２１２ａ～２１２ｅ　第２シート状電池 DESCRIPTION OF SYMBOLS 10 Sheet-shaped battery 11 Base material 13 N-type oxide semiconductor layer 14 Charging layer 16 p-type oxide semiconductor layer 17 2nd electrode 20 Laminated body 31 Laminated | stacking part 32 Peripheral part 111 1st sheet-like battery 112 2nd sheet-like battery 121 First conductive adhesive 122 Second conductive adhesive 125 Extraction electrode 128 Insulating material 200 Stacked battery 201-205 Sheet battery pair 211a-211e First sheet battery 212a-212e Second sheet battery

Claims (10)

  1. 　第１電極、及び第２電極を有する第１シート状電池と、
    　第１電極、及び第２電極を有し、前記第２電極同士が向かい合うように前記第１シート状電池と対向配置された第２シート状電池と、
    　前記第１シート状電池の第２電極と前記第２シート状電池の前記第２電極との間に配置された引出電極と、
    　前記第１シート状電池の前記第２電極と前記引出電極とを接続する第１導電性接着剤と、
    　前記第２シート状電池の前記第２電極と前記引出電極とを接続する第２導電性接着剤と、を備え、
    　前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視において、前記第１導電性接着剤と前記第２導電性接着剤とがずれて配置されている二次電池。     A first sheet-like battery having a first electrode and a second electrode;
    A second sheet-like battery having a first electrode and a second electrode, the second sheet-like battery being disposed facing the first sheet-like battery so that the second electrodes face each other;
    An extraction electrode disposed between the second electrode of the first sheet battery and the second electrode of the second sheet battery;
    A first conductive adhesive connecting the second electrode and the extraction electrode of the first sheet battery;
    A second conductive adhesive connecting the second electrode and the extraction electrode of the second sheet battery,
    In the plan view of the state in which the first sheet battery and the second sheet battery are arranged to face each other, the second conductive adhesive and the secondary conductive adhesive are arranged to be shifted from each other. battery.
  2. 　前記引出電極と前記第１シート状電池の第２電極との間には、複数の第１導電性接着剤が配置されており、
    　前記引出電極と前記第１シート状電池の第２電極との間には、複数の第２導電性接着剤が配置されており、
    　前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視において、前記第１導電性接着剤と前記第２導電性接着剤とが交互に配置されている請求項１に記載の二次電池。     A plurality of first conductive adhesives are disposed between the extraction electrode and the second electrode of the first sheet battery,
    A plurality of second conductive adhesives are disposed between the extraction electrode and the second electrode of the first sheet battery,
    The first conductive adhesive and the second conductive adhesive are alternately arranged in a plan view in a state where the first sheet battery and the second sheet battery are arranged to face each other. 2. The secondary battery according to 1.
  3. 　前記引出電極の長手方向に沿って、前記第１導電性接着剤と前記第２導電性接着剤とが交互に配置されている請求項２に記載の二次電池。 The secondary battery according to claim 2, wherein the first conductive adhesive and the second conductive adhesive are alternately arranged along a longitudinal direction of the extraction electrode.
  4. 　前記第１シート状電池及び第２シート状電池がタブ部を有しており、
    　前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視において、
    　前記第１シート状電池の前記タブ部と第２シート状電池がタブ部とが重複しており、
    　前記第１シート状電池の前記タブ部と第２シート状電池がタブ部では、第１電極同士が向かい合うように配置されている請求項１～３のいずれか１項に記載の二次電池。     The first sheet-shaped battery and the second sheet-shaped battery have a tab portion,
    In a plan view of the state in which the first sheet-shaped battery and the second sheet-shaped battery are arranged to face each other,
    The tab portion of the first sheet battery and the tab portion of the second sheet battery overlap,
    The secondary battery according to any one of claims 1 to 3, wherein the tab portion of the first sheet battery and the second sheet battery are arranged so that the first electrodes face each other at the tab portion.
  5. 　請求項１～４のいずれか１項に記載の二次電池をシート状電池ペアとして、前記シート状電池ペアを複数備え、
    　隣接する２つの前記シート状電池ペアの前記第１電極同士が向かい合うように、複数の前記シート状電池ペアが積層されており、
    　前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視した場合に、前記複数のシート状電池ペアに設けられた前記第１導電性接着剤及び前記第２導電性接着剤がずれて配置されている二次電池。     The secondary battery according to any one of claims 1 to 4 as a sheet-like battery pair, comprising a plurality of the sheet-like battery pairs,
    A plurality of the sheet battery pairs are stacked such that the first electrodes of two adjacent sheet battery pairs adjacent to each other face each other.
    The first conductive adhesive and the second conductive provided in the plurality of sheet-like battery pairs when viewed from above in a state in which the first sheet-like battery and the second sheet-like battery are arranged facing each other. Secondary battery in which the adhesive is displaced.
  6. 　第１電極、及び第２電極を有する第１シート状電池の前記第２電極の上に、第１導電性接着剤を塗布する工程と、
    　前記第１導電性接着剤に引出電極を接続する工程と、
    　前記引出電極の上に、第２導電性接着剤を塗布する工程と、
    　第１電極、及び第２電極を有する第２シート状電池の前記第２電極を前記第２導電性接着剤に接続する工程と、を備え、
    　前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視において、前記第１導電性接着剤と前記第２導電性接着剤とがずれて配置されている二次電池の製造方法。     Applying a first conductive adhesive on the second electrode of the first sheet-shaped battery having the first electrode and the second electrode;
    Connecting an extraction electrode to the first conductive adhesive;
    Applying a second conductive adhesive on the extraction electrode;
    Connecting the second electrode of the second sheet-like battery having the first electrode and the second electrode to the second conductive adhesive,
    In the plan view of the state in which the first sheet battery and the second sheet battery are arranged to face each other, the second conductive adhesive and the secondary conductive adhesive are arranged to be shifted from each other. Battery manufacturing method.
  7. 　前記引出電極と前記第１シート状電池の第２電極との間には、複数の第１導電性接着剤が配置されており、
    　前記引出電極と前記第１シート状電池の第２電極との間には、複数の第２導電性接着剤が配置されており、
    　前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視において、前記第１導電性接着剤と前記第２導電性接着剤とが交互に配置されている請求項６に記載の二次電池の製造方法。     A plurality of first conductive adhesives are disposed between the extraction electrode and the second electrode of the first sheet battery,
    A plurality of second conductive adhesives are disposed between the extraction electrode and the second electrode of the first sheet battery,
    The first conductive adhesive and the second conductive adhesive are alternately arranged in a plan view in a state where the first sheet battery and the second sheet battery are arranged to face each other. 6. A method for producing a secondary battery according to 6.
  8. 　前記引出電極の長手方向に沿って、前記第１導電性接着剤と前記第２導電性接着剤とが交互に配置されている請求項７に記載の二次電池の製造方法。 The method for manufacturing a secondary battery according to claim 7, wherein the first conductive adhesive and the second conductive adhesive are alternately arranged along a longitudinal direction of the extraction electrode.
  9. 　前記第１シート状電池及び第２シート状電池がタブ部を有しており、
    　前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視において、
    　前記第１シート状電池の前記タブ部と第２シート状電池がタブ部とが重複しており、
    　前記第１シート状電池の前記タブ部と第２シート状電池がタブ部では、第１電極同士が向かい合うように配置されている請求項６～８のいずれか１項に記載の二次電池の製造方法。     The first sheet-shaped battery and the second sheet-shaped battery have a tab portion,
    In a plan view of the state in which the first sheet-shaped battery and the second sheet-shaped battery are arranged to face each other,
    The tab portion of the first sheet battery and the tab portion of the second sheet battery overlap,
    The secondary battery according to any one of claims 6 to 8, wherein the tab portion of the first sheet battery and the second sheet battery are arranged so that the first electrodes face each other at the tab portion. Production method.
  10. 　請求項６～９のいずれか１項に記載の二次電池の製造方法によって、シート状電池ペアとなる前記二次電池を複数製造する工程と、
    　隣接する２つの前記シート状電池ペアの前記第１電極同士が向かい合うように、複数の前記シート状電池ペアを積層する工程と、を備え、
    　前記第１シート状電池と前記第２シート状電池が向かい合って配置された状態の平面視した場合に、前記複数のシート状電池ペアに設けられた前記第１導電性接着剤及び前記第２導電性接着剤がずれて配置されている積層電池の製造方法。     A step of producing a plurality of the secondary batteries to be a sheet-like battery pair by the method for producing a secondary battery according to any one of claims 6 to 9,
    Laminating a plurality of the sheet-like battery pairs so that the first electrodes of two adjacent sheet-like battery pairs face each other,
    The first conductive adhesive and the second conductive provided in the plurality of sheet-like battery pairs when viewed from above in a state in which the first sheet-like battery and the second sheet-like battery are arranged facing each other. For producing a laminated battery in which the adhesive is displaced.
PCT/JP2019/019996 2018-05-31 2019-05-21 Secondary battery, laminate battery, and manufacturing method WO2019230484A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH031455A (en) * 1989-05-30 1991-01-08 Shin Kobe Electric Mach Co Ltd Sealed square alkaline storage battery
JP2006040875A (en) * 2004-07-29 2006-02-09 Samsung Sdi Co Ltd Electrode assembly and lithium secondary battery using it
JP3162607U (en) * 2010-06-28 2010-09-09 佑正 許 Full contact tab structure of rechargeable battery
JP2017127063A (en) * 2016-01-12 2017-07-20 トヨタ自動車株式会社 Stator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH031455A (en) * 1989-05-30 1991-01-08 Shin Kobe Electric Mach Co Ltd Sealed square alkaline storage battery
JP2006040875A (en) * 2004-07-29 2006-02-09 Samsung Sdi Co Ltd Electrode assembly and lithium secondary battery using it
JP3162607U (en) * 2010-06-28 2010-09-09 佑正 許 Full contact tab structure of rechargeable battery
JP2017127063A (en) * 2016-01-12 2017-07-20 トヨタ自動車株式会社 Stator

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