WO2021060400A1 - Stacked battery and method of transporting stacked battery - Google Patents
Stacked battery and method of transporting stacked battery Download PDFInfo
- Publication number
- WO2021060400A1 WO2021060400A1 PCT/JP2020/036112 JP2020036112W WO2021060400A1 WO 2021060400 A1 WO2021060400 A1 WO 2021060400A1 JP 2020036112 W JP2020036112 W JP 2020036112W WO 2021060400 A1 WO2021060400 A1 WO 2021060400A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- base material
- laminated battery
- side portion
- positive electrode
- tab
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 28
- 239000000463 material Substances 0.000 claims abstract description 158
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 16
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- 229910017052 cobalt Inorganic materials 0.000 description 4
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 4
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- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 1
- 229910016118 LiMn1.5Ni0.5O4 Inorganic materials 0.000 description 1
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- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/90—Devices for picking-up and depositing articles or materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a laminated battery and a method for transporting the laminated battery.
- a laminated battery in which positive electrode plates and negative electrode plates are alternately laminated is widely used.
- a lithium ion secondary battery can be exemplified.
- One of the features of the lithium-ion secondary battery is that it has a larger capacity than other types of stacked batteries. Lithium-ion secondary batteries having such characteristics are expected to be further spread in various applications such as in-vehicle applications and stationary housing applications.
- the laminated battery includes a membrane electrode assembly having a plurality of positive electrode plates (first electrode plates) and a plurality of negative electrode plates (second electrode plates) alternately laminated in the stacking direction.
- the membrane electrode assembly is sealed in the outer body together with the electrolytic solution. After that, the laminated battery is suspended and conveyed in an upright state while the bulging portion region where the bulging portion of the exterior body is located is sandwiched by the sandwiching device.
- the pressing force on the bulging portion region by the sandwiching device increases, and the portion of the membrane electrode assembly located inside the bulging portion (for example, the electrode active material layer) is deformed. There is a risk of In this case, uneven reaction may occur and the performance of the laminated battery may deteriorate.
- the present invention has been made in consideration of such a point, and an object of the present invention is to provide a laminated battery and a method for transporting the laminated battery, which can suppress deterioration of the performance of the laminated battery.
- the laminated battery according to the present invention It ’s a stacked battery, An exterior body having a first base material and a second base material and forming a sealing space between the first base material and the second base material, A membrane electrode assembly provided in the sealing space, the membrane electrode assembly having a plurality of first electrode plates and a plurality of second electrode plates alternately laminated in the stacking direction.
- a first tab connected to one side of the membrane electrode assembly in the first direction when viewed in the stacking direction and extending to the outside of the exterior body in the first direction is provided.
- the first base material is the first tab side portion extending inward from the outer edge on the side of the first tab in the first direction, and the first base material from the inner end of the first tab side portion in the first direction.
- the tab side portion includes a bulging portion that bulges on the side opposite to the side of the second base material and defines the sealing space.
- the weight of the laminated battery is 500 g or more, and the weight is 500 g or more.
- the dimension of the first tab side portion in the first direction is 20 mm or more.
- the dimension of the first tab side portion in the first direction is 100 mm or less. You may do so.
- the dimension of the first tab side portion in the second direction orthogonal to the first direction when viewed in the stacking direction is 100 mm or more. You may do so.
- the first electrode plate includes a first electrode current collector including a first connection region and a first effective region adjacent to each other, and a first electrode active material layer provided in the first effective region.
- the first tab side portion faces the first connection region of the first electrode plate. You may do so.
- the laminated battery according to the present invention Further comprising a second tab connected to the other side of the membrane electrode assembly in the first direction and extending outward of the exterior in the first direction.
- the first substrate includes a second tab side portion extending inward from the outer edge on the side of the second tab in the first direction.
- the bulging portion is formed from the inner end of the first tab side portion to the inner end of the second tab side portion in the first direction.
- the dimension of the second tab side portion in the first direction is 20 mm or more. You may do so.
- the dimension of the second tab side portion in the first direction is 100 mm or less. You may do so.
- the dimension of the second tab side portion in the second direction orthogonal to the first direction when viewed in the stacking direction is 100 mm or more. You may do so.
- the second electrode plate includes a second electrode current collector including a second connection region and a second effective region adjacent to each other, and a second electrode active material layer provided in the second effective region.
- the second tab side portion faces the second connection region of the second electrode plate. You may do so.
- the first base material and the second base material each include a metal layer and a resin adhesive layer provided on the inner surface of the metal layer.
- the bulging portion and the first tab side portion of the first base material are composed of the metal layer and the resin adhesive layer. You may do so.
- the method for transporting a laminated battery according to the present invention is as follows.
- a transfer step of suspending and transporting the laminated battery while sandwiching the sandwiched area by the sandwiching device is provided.
- the method for transporting a laminated battery according to the present invention further includes an erecting step for erecting the laminated battery before the sandwiching step. You may do so.
- FIG. 1 is a perspective view showing a stacked battery according to an embodiment.
- FIG. 2 is a perspective view showing a membrane electrode assembly included in the laminated battery of FIG.
- FIG. 3 is a plan view of FIG.
- FIG. 4 is a partial cross-sectional view of the membrane electrode assembly of FIG. 2 as viewed in the second direction d2.
- FIG. 5 is a plan view of FIG.
- FIG. 6 is a cross-sectional view of the stacked battery of FIG. 5 as viewed in the second direction d2.
- FIG. 7 is a diagram for explaining a step of raising the laminated battery in the method of transporting the laminated battery according to the embodiment.
- FIG. 1 is a perspective view showing a stacked battery according to an embodiment.
- FIG. 2 is a perspective view showing a membrane electrode assembly included in the laminated battery of FIG.
- FIG. 3 is a plan view of FIG.
- FIG. 4 is a partial cross-sectional view of the membrane electrode assembly of FIG. 2 as
- FIG. 8 is a diagram for explaining a step of sandwiching the sandwiched area of the laminated battery by the sandwiching device in the method of transporting the laminated battery according to the embodiment.
- FIG. 9 is a partial cross-sectional view seen in the second direction d2 of FIG.
- FIG. 10 is a diagram for explaining a step of suspending and transporting a laminated battery while sandwiching a sandwiched area by a sandwiching device in the method of transporting a laminated battery according to an embodiment.
- FIG. 11 is a partial cross-sectional view showing a modified example (fourth modified example) of FIG.
- [Stacked battery] 1 to 6 are diagrams for explaining a laminated battery according to an embodiment of the present invention.
- the laminated battery 1 As shown in FIGS. 1 and 2, the laminated battery 1 according to the present embodiment is connected to the exterior body 40, the membrane electrode assembly 5 housed in the exterior body 40, and the membrane electrode assembly 5. It includes a pair of tabs 16 and 26.
- the tabs 16 and 26 extend to the outside of the exterior body 40.
- a module composed of a combination of a plurality of laminated batteries 1 is mounted on the automobile. The electrical connection between the plurality of stacked batteries 1 is realized via the tabs 16 and 26.
- the membrane electrode assembly 5 has a plurality of electrode plates 10X and 20Y including a positive electrode plate 10X (first electrode plate) and a negative electrode plate 20Y (second electrode plate) alternately laminated in the stacking direction dL.
- the membrane electrode assembly 5 constitutes a lithium ion secondary battery
- the first electrode plate constitutes the positive electrode plate 10X
- the second electrode plate constitutes the negative electrode plate 20Y.
- the first electrode plate may form the negative electrode plate 20Y
- the second electrode plate may form the positive electrode plate 10X.
- the present invention is not limited to the lithium ion secondary battery, and can be widely applied to the membrane electrode assembly 5 in which the first electrode plate and the second electrode plate are alternately laminated.
- the membrane electrode assembly 5 has a plurality of positive electrode plates 10X and a plurality of negative electrode plates 20Y.
- the positive electrode plate 10X and the negative electrode plate 20Y are alternately arranged and laminated along the stacking direction dL.
- the negative electrode plates 20Y are arranged at the lowermost and uppermost portions of the membrane electrode assembly 5 in the stacking direction dL.
- the membrane electrode assembly 5 and the laminated battery 1 have a flat shape as a whole, have a thin thickness in the stacking direction dL, and spread in the directions d1 and d2 orthogonal to the stacking direction dL.
- the positive electrode plate 10X and the negative electrode plate 20Y may have any shape when viewed in the stacking direction dL. As shown in the figure, the positive electrode plate 10X and the negative electrode plate 20Y may have an outer contour having a rectangular shape as a whole when viewed in the stacking direction dL.
- the laminated battery 1 has a first direction d1 in which a pair of tabs 16 and 26 are arranged, and a second direction d2 orthogonal to the first direction d1.
- the first direction d1 corresponds to the longitudinal direction (length direction) of the laminated battery 1
- the second direction d2 corresponds to the lateral direction (width direction) of the laminated battery 1. ..
- first direction d1 may correspond to the lateral direction of the laminated battery 1
- second direction d2 may correspond to the longitudinal direction of the laminated battery 1.
- the stacking direction dL is orthogonal to both the first direction d1 and the second direction d2.
- the positive electrode plate 10X and the negative electrode plate 20Y are arranged so as to be offset in the first direction d1. More specifically, the plurality of positive electrode plates 10X are arranged closer to one side in the first direction d1 (right side in FIG. 3), and the plurality of negative electrode plates 20Y are arranged on the other side in the first direction d1 (in FIG. 3). It is located closer to the left side).
- the positive electrode plate 10X and the negative electrode plate 20Y overlap in the stacking direction dL in the central portion (positive electrode effective region b1 and negative electrode effective region b2 described later) in the first direction d1.
- the positive electrode plate 10X has a sheet-like outer shape.
- the positive electrode plate 10X has a positive electrode current collector 11X (first electrode current collector) and a positive electrode active material layer 12X (first electrode active material layer) provided on the positive electrode current collector 11X. ..
- the positive electrode active material layer 12X may have an arbitrary shape, but may have a rectangular outer contour as shown in the figure.
- the positive electrode plate 10X occludes lithium ions during discharging and releases lithium ions during charging.
- the positive electrode current collector 11X has a first surface 11a and a second surface 11b located on opposite sides of each other as main surfaces.
- the positive electrode active material layer 12X is formed on at least one surface of the first surface 11a and the second surface 11b of the positive electrode current collector 11X.
- the positive electrode active material layers 12X are provided on both sides of the positive electrode current collector 11X of each positive electrode plate 10X, and the positive electrode plates 10X can be configured to be the same as each other.
- the positive electrode current collector 11X and the positive electrode active material layer 12X can be produced by various manufacturing methods using various materials that can be applied to the laminated battery 1 (lithium ion secondary battery).
- the positive electrode current collector 11X can be formed of an aluminum foil or an aluminum foil coated with highly conductive carbon particles or carbon nanotubes.
- the positive electrode active material layer 12X may contain, for example, a positive electrode active material, a conductive auxiliary agent, and a binder serving as a binder.
- a positive electrode slurry formed by dispersing a positive electrode active material, a conductive auxiliary agent and a binder in a solvent is applied onto a material forming the positive electrode current collector 11X, and then dried, and then dried.
- the positive electrode active material may contain a transition metal and lithium, or may contain one kind of transition metal and lithium.
- the positive electrode active material include a lithium transition metal composite oxide, a lithium-containing transition metal phosphoric acid compound, and the like, and these may be mixed and used.
- the transition metal of the lithium transition metal composite oxide may be vanadium, titanium, chromium, manganese, iron, cobalt, nickel, copper or the like.
- Specific examples of the lithium transition metal composite oxide include a lithium cobalt composite oxide such as LiCoO 2 , a lithium nickel composite oxide such as LiNiO 2 , and a lithium manganese composite oxide such as LiMnO 2 , LiMn 2 O 4 , and Li 2 MnO 3.
- substitution product examples include, for example, LiNi 0.5 Mn 0.5 O 2 , LiNi 0.80 Co 0.17 Al 0.03 O 2 , LiNi 1/3 Co 1/3 Mn 1/3 O. 2 , LiMn 1.8 Al0.2 O 4 , LiMn 1.5 Ni 0.5 O 4, and the like can be mentioned.
- the transition metal of the lithium-containing transition metal phosphoric acid compound may be vanadium, titanium, manganese, iron, cobalt, nickel or the like, and specific examples thereof include iron phosphates such as LiFePO 4 and LiCoPO. Cobalt phosphates such as 4 and some of the transition metal atoms that are the main constituents of these lithium transition metal phosphate compounds are aluminum, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, magnesium, gallium. , Substituents substituted with other metals such as zirconium, niobium and the like.
- the conductive auxiliary agent fine particles of graphite, carbon black such as acetylene black and Ketjen black, fine particles of amorphous carbon such as needle coke, carbon nanofibers and the like are used, but the present invention is not limited thereto.
- a fluororesin such as polyvinylidene fluoride can be used.
- the positive electrode current collector 11X has a positive electrode connection region a1 (first connection region) and a positive electrode effective region b1 (first effective region) adjacent to each other.
- the positive electrode active material layer 12X is arranged only in the positive electrode effective region b1 of the positive electrode current collector 11X.
- the positive electrode effective region b1 may have an arbitrary shape. As shown in the figure, the positive electrode effective region b1 may have a rectangular outer contour, or may be a region provided with the positive electrode active material layer 12X as a whole.
- the positive electrode connection region a1 and the positive electrode effective region b1 are arranged in the first direction d1 of the positive electrode plate 10X.
- the positive electrode connection region a1 is located outside the positive electrode plate 10X in the first direction d1 (right side in FIG. 3) with respect to the positive electrode effective region b1.
- the positive electrode connection portion 13 (first connection portion) is configured by the positive electrode connection region a1 of each positive electrode current collector 11X.
- the positive electrode connecting portion 13 has a first surface 13a, which is a side surface of the first base material 41, and a second surface 13b, which is a side surface of the second base material 42.
- the first surface 13a corresponds to the first surface 11a in the positive electrode connection region a1 of the positive electrode current collector 11X arranged on the side of the first base material 41 among the plurality of positive electrode current collectors 11X.
- the second surface 13b corresponds to the second surface 11b in the positive electrode connection region a1 of the positive electrode current collector 11X arranged closest to the second base material 42 among the plurality of positive electrode current collectors 11X.
- the positive electrode tab 16 (first tab) is joined to the second surface 13b (see FIG. 6).
- the positive electrode tab 16 is bonded to the second surface 13b by resistance welding, ultrasonic welding, tape bonding, welding, or the like.
- each positive electrode current collector 11X is also joined to each other at a position where the positive electrode tab 16 is joined to the second surface 13b. As a result, each positive electrode current collector 11X and the positive electrode tab 16 are electrically connected.
- the positive electrode effective region b1 is provided in the region of the negative electrode plate 20Y facing the negative electrode active material layer 22Y, which will be described later, when viewed in the stacking direction dL. Therefore, the size of the positive electrode effective region b1 of the positive electrode plate 10X in the first direction d1 is smaller than the size of the negative electrode effective region b2 of the negative electrode plate 20Y in the first direction d1 which will be described later. Further, the size of the positive electrode plate 10X in the second direction d2 is smaller than the size of the negative electrode plate 20Y in the second direction d2.
- the positive electrode plate 10X has a relatively large size, and the size of the positive electrode plate 10X in the first direction d1 may be 180 mm or more.
- the size of the positive electrode effective region b1 of the positive electrode plate 10X in the first direction d1 may be 150 mm or more.
- the size of the positive electrode plate 10X in the second direction d2 may be 80 mm or more.
- the negative electrode plate 20Y also has a sheet-like outer shape like the positive electrode plate 10X.
- the negative electrode plate 20Y has a negative electrode current collector 21Y (second electrode current collector) and a negative electrode active material layer 22Y (second electrode active material layer) provided on the negative electrode current collector 21Y. ..
- the negative electrode active material layer 22Y may have an arbitrary shape, but may have a rectangular outer contour as shown in the figure.
- the negative electrode plate 20Y emits lithium ions at the time of discharging and occludes the lithium ions at the time of charging.
- the negative electrode current collector 21Y has a first surface 21a and a second surface 21b located on opposite sides of each other as main surfaces.
- the negative electrode active material layer 22Y is formed on at least one of the first surface 21a and the second surface 21b of the negative electrode current collector 21Y.
- the negative electrode active material layers 22Y are provided on both sides of the negative electrode current collector 21Y of each negative electrode plate 20Y, and the negative electrode plates 20Y can be configured to be the same as each other.
- the negative electrode active material layer 22Y may not be provided on the first surface 21a of the negative electrode current collector 21Y of the negative electrode plate 20Y arranged closest to the first base material 41. Further, the negative electrode active material layer 22Y may not be provided on the second surface 21b of the negative electrode current collector 21Y of the negative electrode plate 20Y arranged closest to the second base material 42.
- the negative electrode current collector 21Y and the negative electrode active material layer 22Y can be produced by various manufacturing methods using various materials that can be applied to the laminated battery 1 (lithium ion secondary battery).
- the negative electrode current collector 21Y is formed of, for example, a copper foil.
- the negative electrode active material layer 22Y may contain, for example, a negative electrode active material, a conductive auxiliary agent, a binder serving as a binder, and a thickener.
- a slurry for a negative electrode formed by dispersing a negative electrode active material, a conductive auxiliary agent, a binder and a thickener in a solvent is applied onto a material forming the negative electrode current collector 21Y, followed by coating.
- Examples of the negative electrode active material include metallic lithium, lithium alloys, carbon-based materials capable of occluding and releasing lithium ions (carbon powder, graphite powder, etc.), metal oxides, and the like.
- Examples of the conductive auxiliary agent include acetylene black and carbon nanotubes.
- Examples of the binder include fluororesins such as polyvinylidene fluoride and styrene-butadiene rubber.
- Examples of the thickener include carboxymethyl cellulose and the like.
- the negative electrode current collector 21Y has a negative electrode connection region a2 (second connection region) and a negative electrode effective region b2 (second effective region) adjacent to each other.
- the negative electrode active material layer 22Y is arranged only in the negative electrode effective region b2 of the negative electrode current collector 21Y.
- the negative electrode effective region b2 may have an arbitrary shape. As shown in the figure, the negative electrode effective region b2 may have a rectangular outer contour, or may be a region provided with the negative electrode active material layer 22Y as a whole.
- the negative electrode connection region a2 and the negative electrode effective region b2 are arranged in the first direction d1 of the negative electrode plate 20Y.
- the negative electrode connection region a2 is located outside the negative electrode plate 20Y in the first direction d1 (left side in FIG. 3) with respect to the negative electrode effective region b2.
- the negative electrode connection portion 23 (second connection portion) is configured by the negative electrode connection region a2 of each negative electrode current collector 21Y.
- the negative electrode connecting portion 23 has a first surface 23a, which is a side surface of the first base material 41, and a second surface 23b, which is a side surface of the second base material 42.
- the first surface 23a corresponds to the first surface 21a in the negative electrode connection region a2 of the negative electrode current collector 21Y arranged closest to the first base material 41 among the plurality of negative electrode current collectors 21Y.
- the second surface 23b corresponds to the second surface 21b in the negative electrode connection region a2 of the negative electrode current collector 21Y arranged closest to the second base material 42 among the plurality of negative electrode current collectors 21Y.
- the negative electrode tab 26 (second tab) is joined to the second surface 23b (see FIG. 6).
- the negative electrode tab 26 is bonded to the second surface 23b by resistance welding, ultrasonic welding, tape bonding, welding, or the like.
- the negative electrode current collectors 21Y are also joined to each other at the position where the negative electrode tab 26 is joined to the second surface 23b. As a result, each negative electrode current collector 21Y and the negative electrode tab 26 are electrically connected.
- the negative electrode effective region b2 extends so as to include a region of the positive electrode plate 10X facing the positive electrode active material layer 12X when viewed in the stacking direction dL. That is, the negative electrode effective region b2 extends so as to protrude to the outside of the positive electrode active material layer 12X over the entire circumference when viewed in the stacking direction dL. Therefore, as described above, the size of the negative electrode effective region b2 of the negative electrode plate 20Y in the first direction d1 is larger than the size of the positive electrode effective region b1 of the positive electrode plate 10X in the first direction d1. Further, the size of the negative electrode plate 20Y in the second direction d2 is larger than the size of the positive electrode plate 10X in the second direction d2.
- the negative electrode plate 20Y has a relatively large size, and the size of the negative electrode plate 20Y in the first direction d1 may be 180 mm or more.
- the size of the negative electrode effective region b2 of the negative electrode plate 20Y in the first direction d1 may be 150 mm or more.
- the size of the negative electrode plate 20Y in the second direction d2 may be 80 mm or more.
- the insulating sheet 31 may be arranged between the positive electrode plate 10X and the negative electrode plate 20Y.
- the insulating sheet 31 is interposed between the positive electrode plate 10X and the negative electrode plate 20Y and functions as a separator.
- the insulating sheet 31 is arranged between the functional layer 30A of the positive electrode plate 10X, which will be described later, and the negative electrode active material layer 22Y of the negative electrode plate 20Y.
- Such an insulating sheet 31 can be formed of, for example, a non-woven fabric or a porous material.
- the electrolytic solution or the gel-like electrolytic solution contained in the exterior body 40 is impregnated into the insulating sheet 31 and held.
- the insulating sheet 31 used in this example is not particularly limited, and various insulators applicable to the laminated battery 1, particularly the lithium ion secondary battery, can be used.
- the positive electrode plate 10X and the negative electrode plate 20Y may have the functional layer 30A on the surface facing the other.
- the functional layer 30A has an insulating property and prevents the positive electrode plate 10X and the negative electrode plate 20Y from being short-circuited.
- the positive electrode plate 10X has a functional layer 30A.
- the functional layer 30A is provided on the surface of the positive electrode active material layer 12X on the side of the insulating sheet 31 (the surface facing the insulating sheet 31). That is, the functional layer 30A is provided on the surface of each positive electrode active material layer 12X on the opposite side of the insulating sheet 31.
- the surface of each positive electrode active material layer 12X is covered with the functional layer 30A.
- the surface of the positive electrode plate 10X facing the insulating sheet 31 in the stacking direction dL is formed by the functional layer 30A.
- the negative electrode plate 20Y may have a functional layer 30A covering each negative electrode active material layer 22Y.
- the functional layer 30A may have a higher porosity than the negative electrode active material layer 22Y. Further, the functional layer 30A may have excellent heat resistance.
- An inorganic material may be used as the material of such a functional layer 30A. The inorganic material can impart excellent heat resistance, for example, heat resistance of 150 ° C. or higher to the functional layer 30A together with a high porosity.
- Inorganic materials include silicon dioxide, silicon nitride, alumina, boehmite, titania, zirconia, boron nitride, zinc oxide, tin dioxide, niobium oxide (Nb 2 O 5 ), tantalum oxide (Ta 2 O 5 ), potassium fluoride, Examples thereof include lithium fluoride, clay, zeolite, calcium carbonate, niob-tantalum composite oxide and magnesium-tantalum composite oxide. Further, an organic material may be used as the material of the functional layer 30A.
- organic material examples include fibrous substances and particulate substances such as cellulose and its variants, polyolefins, polyethylene terephthalates, polybutylene terephthalates, polypropylenes, polyesters, polyacrylonitriles, aramids, polyamideimides, and polyimides.
- the functional layer 30A is formed of alumina, it can be produced by coating it on the positive electrode active material layer 12X and solidifying it.
- the positive electrode tab 16 is connected to one side (right side in FIG. 3) of the membrane electrode assembly 5 in the first direction d1. Further, the negative electrode tab 26 is connected to the other side (left side in FIG. 3) of the membrane electrode assembly 5 in the first direction d1.
- the positive electrode tab 16 is connected to the second surface 13b of the positive electrode connection portion 13 of the membrane electrode assembly 5. Further, the negative electrode tab 26 is connected to the second surface 23b of the negative electrode connection portion 23 of the membrane electrode assembly 5.
- the tabs 16 and 26 are bonded by resistance welding, ultrasonic welding, tape bonding, welding, or the like, respectively. As a result, the positive electrode tab 16 is electrically connected to each positive electrode current collector 11X, and the negative electrode tab 26 is electrically connected to each negative electrode current collector 21Y.
- the positive electrode tab 16 extends to the outside of the exterior body 40 in the first direction d1 and functions as a positive electrode terminal of the laminated battery 1.
- the positive electrode tab 16 is provided with a positive electrode sealant 18.
- the negative electrode tab 26 extends to the outside of the exterior body 40 in the first direction d1 and functions as a negative electrode terminal of the laminated battery 1.
- the negative electrode tab 26 is provided with a negative electrode sealant 28.
- the positive electrode tab 16 can be formed by using aluminum or the like.
- the negative electrode tab 26 can be formed using nickel, nickel-plated copper, or the like.
- the sealants 18 and 28 are made of a material that can be welded to the resin adhesive layer 40b of the exterior body 40 and the tabs 16 and 26. Examples of the materials of the sealants 18 and 28 include polypropylene, modified polypropylene, low-density polypropylene, ionomer, ethylene-vinyl acetate and the like.
- the exterior body 40 is a packaging material for sealing the membrane electrode assembly 5. As shown in FIGS. 5 and 6, the exterior body 40 has a first base material 41 (upper outer body) and a second base material 42 (lower outer body) facing the first base material 41. are doing. In the present embodiment, the first base material 41 and the second base material 42 are configured as separate bodies.
- the second base material 42 is formed in a sheet shape.
- the first base material 41 is formed in a convex shape. More specifically, the first base material 41 has a peripheral portion 43 and a bulging portion 44.
- the peripheral portion 43 includes a positive electrode tab side portion 43a (first tab side portion) extending inward from the outer edge 41a (right side in FIG. 5) on the positive electrode tab 16 side in the first direction d1, and a negative electrode in the first direction d1. It includes a negative electrode tab side portion 43b (second tab side portion) extending inward from the outer edge 41b (left side in FIG. 5) on the tab 26 side.
- the peripheral portion 43 includes a first side portion 43c extending inward from the outer edge 41c on one side in the second direction d2 (lower side in FIG. 5) and an outer edge 41d on the other side in the second direction d2.
- a second side portion 43d extending inward from the upper side in FIG. 5) is included.
- the bulging portion 44 bulges to the side opposite to the side of the second base material 42 (the side of the metal layer 40a described later of the first base material 41) with respect to the positive electrode tab side portion 43a.
- the bulging portion 44 is formed from the inner end 43e of the positive electrode tab side portion 43a to the inner end 43f of the negative electrode tab side portion 43b in the first direction d1.
- the bulging portion 44 is formed from the inner end 43g of the first side portion 43c to the inner end 43h of the second side portion 43d in the second direction d2.
- the bulging portion 44 defines a sealing space 45 between the first base material 41 and the second base material 42.
- the membrane electrode assembly 5 is housed in the sealing space 45.
- the bulging portion 44 faces the portion where the positive electrode effective region b1 and the negative electrode effective region b2 of the membrane electrode assembly 5 overlap.
- the positive electrode tab side portion 43a faces the positive electrode connecting portion 13 of the membrane electrode assembly 5, that is, the positive electrode connecting region a1 of the positive electrode plate 10X.
- the negative electrode tab side portion 43b faces the negative electrode connection portion 23 of the membrane electrode assembly 5, that is, the negative electrode connection region a2 of the negative electrode plate 20Y.
- the bulging portion 44 is formed, for example, by pressing a desired region of the sheet-shaped first base material 41 (drawing). In this case, the peripheral portion 43 and the bulging portion 44 are integrally formed.
- the exterior body 40 may have flexibility.
- the first base material 41 and the second base material 42 of the exterior body 40 are each composed of a laminated film having a metal layer 40a and a resin adhesive layer 40b provided on the inner surface of the metal layer 40a.
- the metal layer 40a may have high gas barrier properties and molding processability.
- Such a metal layer 40a may be formed of a metal material such as aluminum foil or stainless steel foil.
- the resin adhesive layer 40b is located on the inner surface of the metal layer 40a and functions as a sealing layer for joining the metal layers 40a.
- the resin adhesive layer 40b may have insulating property, chemical resistance, thermoplasticity, etc. in addition to adhesiveness.
- Such a resin adhesive layer 40b may be formed of a resin material such as polypropylene, modified polypropylene, low density polypropylene, ionomer, ethylene / vinyl acetate or the like.
- the laminated battery 1 according to the present embodiment is manufactured by arranging the membrane electrode assembly 5 between the first base material 41 and the second base material 42 and then laminating. That is, on the peripheral edge of the exterior body 40, the resin adhesive layer 40b formed on the inner surfaces of the first base material 41 and the second base material 42 is heat-sealed (heat welded) to form the seal portion 46. .. In this way, the membrane electrode assembly 5 is housed in the sealing space 45 in which the first base material 41 and the second base material 42 are joined and the inside of the exterior body 40 is sealed.
- the tabs 16 and 26 each extend from the inside of the exterior body 40 to the outside of the exterior body 40 through the seal portion 46 in the first direction d1.
- the first base material 41 and the tabs 16 and 26 are heat-sealed via the sealants 18 and 28.
- the second base material 42 and the tabs 16 and 26 are heat-sealed via the sealants 18 and 28.
- the exterior body 40 accommodates the positive electrode plate 10X and the negative electrode plate 20Y having a relatively large size as described above. Therefore, the exterior body 40 also has a relatively large size.
- the dimension L of the first base material 41 in the first direction d1 may be 200 mm or more.
- the dimension W of the first base material 41 in the second direction d2 may be 100 mm or more.
- the dimensions L and W here mean the plane dimensions in a state where the peripheral edge portion of the exterior body 40 is flat without folding back at the end portion of the exterior body 40. When the end portion of the exterior body 40 is folded back, the dimensions L and W are the dimensions when the folded portion is returned to flatten the peripheral edge portion of the exterior body 40.
- the dimensions of the second base material 42 in the first direction d1 and the dimensions of the second base material 42 in the second direction d2 may be similar to those of the first base material 41.
- the dimension dx1 of the positive electrode tab side portion 43a in the first direction d1 may be 20 mm or more, or 100 mm or less.
- the dimension dx2 of the negative electrode tab side portion 43b in the first direction d1 may also be 20 mm or more, or 100 mm or less.
- the dimension of the positive electrode tab side portion 43a in the second direction d2 may be the same as the dimension W of the first base material 41 in the second direction d2, or may be 100 mm or more.
- the size of the negative electrode tab side portion 43b in the second direction d2 may be the same as the size W of the first base material 41 in the second direction d2, or may be 100 mm or more.
- these dimensions also mean the dimensions in a state where the peripheral edge portion of the exterior body 40 is flat without folding back at the end portion of the exterior body 40, and the end portion of the exterior body 40 is folded back. If so, it is the dimension when the folded-back portion is returned and the peripheral edge portion of the exterior body 40 is made flat.
- the laminated battery 1 is a large laminated battery 1 including electrode plates 10X and 20Y having a relatively large size and an exterior body 40. Therefore, the weight of the laminated battery 1 is increased. In the present embodiment, the weight of the laminated battery 1 may be 500 g or more.
- the laminated battery 1 configured in this way has a first sandwiched region S1 defined as a region overlapping the positive electrode tab side portion 43a and a region overlapping the negative electrode tab side portion 43b when viewed in the stacking direction dL. It is divided into a defined second sandwiched area S2 and a bulging portion area SB where the bulging portion 44 is located, which is provided between the first sandwiched area S1 and the second sandwiched area S2. (See FIGS. 5 and 6).
- the first sandwiched area S1 and the second sandwiched area S2 are areas for being sandwiched by the sandwiching device 60, which will be described later, when the laminated battery 1 is conveyed.
- the method for manufacturing the laminated battery described below includes a membrane electrode assembly preparation step for preparing the membrane electrode assembly 5, a tab attachment step for attaching the tabs 16 and 26 to the membrane electrode assembly 5, and a first base material 41. And an exterior body preparation step for preparing the second base material 42, and a sealing step for sealing the membrane electrode assembly 5 between the first base material 41 and the second base material 42.
- a membrane electrode assembly preparation step for preparing the membrane electrode assembly 5
- a tab attachment step for attaching the tabs 16 and 26 to the membrane electrode assembly 5
- a first base material 41 for attaching the tabs 16 and 26 to the membrane electrode assembly 5
- an exterior body preparation step for preparing the second base material 42
- a sealing step for sealing the membrane electrode assembly 5 between the first base material 41 and the second base material 42.
- the membrane electrode assembly preparation step includes a step of producing the positive electrode plate 10X and the negative electrode plate 20Y, respectively, and a step of alternately laminating the positive electrode plate 10X and the negative electrode plate 20Y.
- a composition (slurry) that constitutes the positive electrode active material layer 12X is applied onto a long aluminum foil that constitutes the positive electrode current collector 11X, and then dried. Then press to increase the density. Next, it can be cut to a desired size to produce a single-wafer-shaped positive electrode plate 10X.
- a composition (slurry) that constitutes the negative electrode active material layer 22Y is applied onto a long copper foil that constitutes the negative electrode current collector 21Y, subsequently dried, and then pressed. To increase the density. Next, it can be cut to a desired size to produce a single-wafer-shaped negative electrode plate 20Y.
- the functional layer 30A is formed of alumina on at least one of the positive electrode plate 10X and the negative electrode plate 20Y and applied, for example, on a long material before cutting or after cutting so as to form the electrode plates 10X and 20Y.
- the functional layer 30A can be produced by applying a material containing alumina on the single-wafer material of No. 1 and solidifying it.
- a step of alternately laminating the positive electrode plate 10X and the negative electrode plate 20Y is carried out.
- the positive electrode active material layer 12X of the positive electrode plate 10X and the negative electrode active material layer 22Y of the negative electrode plate 20Y face each other, and the insulating sheet 31 is interposed between the positive electrode plate 10X and the negative electrode plate 20Y.
- Positive electrode plate 10X and negative electrode plate 20Y are laminated.
- the negative electrode plate 20Y is arranged at the lowermost portion and the uppermost portion in the stacking direction dL.
- the membrane electrode assembly 5 in which the positive electrode plate 10X and the negative electrode plate 20Y are alternately laminated can be obtained.
- a tab attachment step is performed.
- a pair of tabs 16 and 26 are attached to both sides of the membrane electrode assembly 5 in the first direction d1.
- the tab attachment step includes a step of preparing the tabs 16 and 26 and a step of attaching the tabs 16 and 26 to the membrane electrode assembly 5.
- a positive electrode tab 16 made of aluminum metal and to which a positive electrode sealant 18 is attached is prepared.
- the positive electrode sealant 18 is attached so as to cover a part of the positive electrode tab 16 in the first direction d1, and is attached so as to extend to both sides of the positive electrode tab 16 in the second direction d2.
- a negative electrode tab 26 formed of copper metal and to which a negative electrode sealant 28 is attached is prepared.
- the negative electrode sealant 28 is attached so as to cover a part of the negative electrode tab 26 in the first direction d1, and is attached so as to extend to both sides of the negative electrode tab 26 in the second direction d2.
- the steps of attaching the tabs 16 and 26 to the membrane electrode assembly 5 are carried out.
- the prepared tabs 16 and 26 are attached to the connecting portions 13 and 23 of the membrane electrode assembly 5, respectively.
- the positive electrode tab 16 is placed on the stage.
- the membrane electrode assembly 5 is placed so that the upper surface of the positive electrode tab 16 and the second surface 13b of the positive electrode connection portion 13 of the membrane electrode assembly 5 partially overlap.
- the membrane electrode assembly 5 is aligned with the positive electrode tab 16 so that the center position of the positive electrode connection region a1 in the second direction d2 and the center position of the positive electrode tab 16 coincide with each other.
- the positive electrode tab 16 is welded to the positive electrode connection portion 13 of the membrane electrode assembly 5 by resistance welding, ultrasonic welding, or the like. As a result, the positive electrode tab 16 is joined to the second surface 13b of the positive electrode connecting portion 13. At this time, the positive electrode current collectors 11X are also joined to each other at the position where the positive electrode tab 16 is joined to the second surface 13b. In this way, the positive electrode tab 16 can be electrically connected to the positive electrode connection portion 13 of the membrane electrode assembly. Similarly, the prepared negative electrode tab 26 can be electrically connected to the negative electrode connection portion 23 of the membrane electrode assembly 5.
- the exterior body preparation step In the exterior body preparation step, the first base material 41 and the second base material 42 are prepared.
- the exterior body preparation step includes a step of manufacturing the first base material 41 and a step of manufacturing the second base material 42.
- the step of producing the first base material 41 first, a composition of a resin material that constitutes the resin adhesive layer 40b is applied to one side of the aluminum foil that constitutes the metal layer 40a and solidified. Next, it is cut to a desired size to obtain a flat plate-shaped first base material 41. After that, the flat plate-shaped first base material 41 is drawn to form a bulging portion 44.
- the dimension dx1 of the positive electrode tab side portion 43a and the dimension dx2 of the negative electrode tab side portion 43b in the first direction d1 are formed so as to have desired values.
- the first base material 41 having the positive electrode tab side portion 43a and the negative electrode tab side portion 43b having desired dimensions can be produced (see FIG. 5).
- a composition of a resin material that constitutes the resin adhesive layer 40b is applied to one side of the aluminum foil that constitutes the metal layer 40a and solidified. Next, it is cut to a desired size to obtain a flat plate-shaped second base material 42.
- first base material 41 and the second base material 42 constituting the exterior body 40 that seals the membrane electrode assembly 5 can be obtained.
- a sealing step is performed after the tab mounting step and the exterior body preparation step.
- the membrane electrode assembly 5 is sealed in the exterior body 40.
- the second base material 42 is placed on the stage so that the resin adhesive layer 40b faces upward.
- the membrane electrode assembly 5 is placed on the second base material 42.
- the first base material 41 is covered over the membrane electrode assembly 5 so that the membrane electrode assembly 5 is housed in the bulge 44.
- the first base material 41 is covered so that the resin adhesive layer 40b of the first base material 41 faces the resin adhesive layer 40b of the second base material 42.
- the first base material 41 is covered so that the positive electrode tab side portion 43a faces the positive electrode connection region a1 of the positive electrode plate 10X and the negative electrode tab side portion 43b faces the negative electrode connection region a2 of the negative electrode plate 20Y.
- the membrane electrode assembly 5 is arranged between the first base material 41 and the second base material 42 with the tabs 16 and 26 extending to the outside.
- the sealants 18 and 28 are arranged between the exterior body 40 and the tabs 16 and 26.
- the first base material 41 and the second base material 42 are pressed by a metal heat bar having a temperature of, for example, 150 ° C. to 200 ° C. around the membrane electrode assembly 5.
- a metal heat bar having a temperature of, for example, 150 ° C. to 200 ° C. around the membrane electrode assembly 5.
- the resin adhesive layers 40b formed on the inner surfaces of the first base material 41 and the second base material 42 are melted in the vicinity of the region pressed by the heat bar, and they are heat-sealed (heat welded) with each other.
- the seal portion 46 is formed.
- one edge of the exterior body 40 in the second direction d2 (lower side in FIG. 5) and one edge of the exterior body 40 in the first direction d1 (side of the positive electrode tab 16).
- the right side in FIG. 5) and the other edge of the exterior body 40 in the first direction d1 (the side of the negative electrode tab 26, the left side in FIG. 5) are pressed by the heat bar.
- the resin adhesive layers 40b formed on the inner surfaces of the first base material 41 and the second base material 42 are melted in the vicinity of the region pressed by the heat bar, and they are heat-sealed (heat welded) with each other.
- the sealants 18 and 28 melt together with the resin adhesive layer 40b of the first base material 41 and the resin adhesive layer 40b of the second base material 42 around the tabs 16 and 26. Therefore, the first base material 41 and the tabs 16 and 26 are heat-sealed, and the second base material 42 and the tabs 16 and 26 are heat-sealed. As a result, it is possible to prevent the formation of a gap around the tabs 16 and 26 so as to communicate the sealing space 45 with the outside of the exterior body 40. By heat-sealing in this way, an opening is formed at the other side edge portion (upper side in FIG. 5) of the exterior body 40 in the second direction d2.
- the electrolytic solution is injected into the exterior body 40 from this opening.
- the inside of the exterior body 40 is filled with the electrolytic solution.
- the other edge portion (upper side in FIG. 5) of the exterior body 40 is pressed by the heat bar.
- the other side edge portion of the exterior body 40 in the second direction d2 is heat-sealed, and the opening portion is closed. Therefore, as shown in FIG. 5, the sealing portion 46 is continuously formed around the entire circumference of the membrane electrode assembly 5, and the frame-shaped sealing portion 46 allows the membrane electrode assembly 5 in the sealing space 45 to be formed. It is sealed in the exterior body 40 together with the electrolytic solution. This heat seal is performed in a pressure reducing chamber (not shown), and the sealing space 45 is sealed while being reduced in pressure.
- the laminated battery 1 in which the membrane electrode assembly 5 is sealed in the exterior body 40 can be obtained.
- the method for transporting the laminated battery described below includes a laminated battery preparation step (preparation step) for preparing the laminated battery 1, an upright step for raising the laminated battery 1, and a holding device 60 for the laminated battery 1. It includes a sandwiching step of sandwiching the sandwiched areas S1 and S2, and a transporting step of suspending and transporting the laminated battery 1 while sandwiching the sandwiched areas S1 and S2 by the sandwiching device 60.
- a laminated battery preparation step for preparing the laminated battery 1
- an upright step for raising the laminated battery 1 and a holding device 60 for the laminated battery 1.
- a holding device 60 for the laminated battery 1. It includes a sandwiching step of sandwiching the sandwiched areas S1 and S2, and a transporting step of suspending and transporting the laminated battery 1 while sandwiching the sandwiched areas S1 and S2 by the sandwiching device 60.
- the laminated battery 1 is prepared.
- the laminated battery 1 can be obtained by the method for manufacturing the laminated battery described above.
- the obtained laminated battery 1 is mounted on the mounting surface 51 of the stage 50 so that the stacking direction dL of the laminated battery 1 is orthogonal to the mounting surface 51 of the stage 50.
- the lower surface (outer surface) of the second base material 42 of the laminated battery 1 faces the mounting surface 51.
- the stacking direction dL of the laminated battery 1 is parallel to the mounting surface 51 of the stage 50, and the outer surface of the second base material 42 of the laminated battery 1 is mounted. It becomes perpendicular to the surface 51.
- the laminated battery 1 is arranged so that one side in the second direction d2 is positioned upward when viewed in the first direction d1.
- the lower surface of the second base material 42 may be pushed up.
- the laminated battery 1 can be erected on the stage 50.
- the sandwiching step includes a step of sandwiching the first sandwiched area S1 and a step of sandwiching the second sandwiched area S2.
- the first sandwiched area S1 is provided by the sandwiching device 60 having the first sandwiching portion 61 for sandwiching the first sandwiched area S1 and the second sandwiching portion 62 for sandwiching the second sandwiched area S2.
- An example of sandwiching the second sandwiched area S2 will be described.
- the dimension dm1 of the first sandwiching portion 61 in the first direction d1 may be 5 mm or more and 20 mm or less.
- the dimension dm1 of the first sandwiching portion 61 in the first direction d1 is 20 mm.
- the dimension dn1 of the first holding portion 61 in the second direction d2 is, for example, 100 mm (see FIG. 8).
- the dimension dm2 of the second sandwiching portion 62 in the first direction d1 may be 5 mm or more and 20 mm or less.
- the dimension dm2 of the second sandwiching portion 62 in the first direction d1 is 20 mm.
- the dimension dn2 of the second holding portion 62 in the second direction d2 is, for example, 100 mm (see FIG. 8).
- the contact portions of the sandwiching portions 61 and 62 with the laminated battery 1 may be covered with rubber.
- the pair of first sandwiched portions 61 of the sandwiching device 60 are moved to a position where the first sandwiched area S1 of the laminated battery 1 can be sandwiched. More specifically, one of the first sandwiching portions 61 is positioned on one side of the positive electrode tab side portion 43a so as to face the positive electrode tab side portion 43a, and the other first sandwiching portion 61 is positioned on the positive electrode tab side portion 43a. It is positioned on the other side so as to face the positive electrode tab side portion 43a (see FIG. 9). Subsequently, the pair of first sandwiching portions 61 sandwiches the first sandwiched area S1 with a predetermined pressing force.
- the first sandwiching portion 61 sandwiches the positive electrode connecting portion 13 of the positive electrode plate 10X via the first base material 41 and the second base material 42.
- the dimension dm1 of the first sandwiching portion 61 in the first direction d1 is equal to or less than the dimension dx1 of the positive electrode tab side portion 43a in the first direction d1 described above. Therefore, the first sandwiched area S1 can be sandwiched by the first sandwiched portion 61.
- the pair of second sandwiched portions 62 of the sandwiching device 60 is moved to a position where the second sandwiched area S2 of the laminated battery 1 can be sandwiched.
- the second sandwiching portions 62 is positioned on one side of the negative electrode tab side portion 43b so as to face the negative electrode tab side portion 43b, and the other second sandwiching portion 62 is located on the negative electrode tab side portion 43b. It is positioned on the other side so as to face the negative electrode tab side portion 43b (see FIG. 9).
- the pair of second sandwiching portions 62 sandwiches the second sandwiched area S2 with a predetermined pressing force.
- the second sandwiching portion 62 sandwiches the negative electrode connecting portion 23 of the negative electrode plate 20Y via the first base material 41 and the second base material 42.
- the dimension dm2 of the second sandwiching portion 62 in the first direction d1 is equal to or less than the dimension dx2 of the negative electrode tab side portion 43b in the first direction d1 described above. Therefore, the second sandwiched area S2 can be sandwiched by the second sandwiched portion 62.
- the first sandwiched area S1 and the second sandwiched area S2 of the laminated battery 1 are sandwiched by the sandwiching device 60.
- the step of sandwiching the first sandwiched area S1 and the step of sandwiching the second sandwiched area S2 may be performed at the same time, but may be performed at different timings.
- this transfer step first, as shown in FIG. 8, in a state where the first sandwiched area S1 and the second sandwiched area S2 of the laminated battery 1 are sandwiched by the sandwiching device 60, the first sandwiching device 60 is sandwiched. The portion 61 and the second sandwiching portion 62 are raised. As a result, as shown in FIG. 10, the laminated battery 1 is separated from the mounting surface 51 of the stage 50 and suspended by the holding device 60. Subsequently, the first holding portion 61 and the second holding portion 62 are moved in the horizontal direction to transport the laminated battery 1 to a desired target position (a position where the next step, for example, the inspection step of the laminated battery is performed). To do.
- a desired target position a position where the next step, for example, the inspection step of the laminated battery is performed.
- the first holding portion 61 and the second holding portion 62 are lowered, and the stacked battery 1 is in an upright state and a tray having a slit provided at the target position (not shown). ).
- the first sandwiching portion 61 is removed from the first sandwiched area S1
- the second sandwiching portion 62 is removed from the second sandwiched area S2
- the first sandwiching portion 61 and the second sandwiching portion 62 are retracted.
- the laminated battery 1 can be suspended and conveyed while sandwiching the sandwiched areas S1 and S2 by the sandwiching device 60.
- the dimension dx1 of the positive electrode tab side portion 43a in the first direction d1 is 20 mm or more.
- the laminated battery 1 can be provided with the first sandwiched area S1 for sandwiching by the sandwiching device 60. Therefore, when the laminated battery 1 is conveyed, the first sandwiched area S1 can be sandwiched by the sandwiching device 60, and it is possible to prevent the bulging region SB from being sandwiched by the sandwiching device 60. That is, when the weight of the laminated battery 1 is large, the pressing force by the holding device 60 can be high.
- the portion of the membrane electrode assembly 5 located inside the bulging portion 44 (for example, the electrode active material layers 12X and 22Y) is deformed. There is a possibility of doing so.
- the first sandwiched region S1 can be sandwiched, so that the bulge region SB is prevented from being sandwiched. can do. As a result, deterioration of the performance of the laminated battery 1 can be suppressed.
- the dimension dx1 of the positive electrode tab side portion 43a in the first direction d1 is 100 mm or less. As a result, it is possible to suppress an increase in the area of the first sandwiched region S1 when viewed in the stacking direction dL. Therefore, it is possible to suppress a decrease in the energy density of the laminated battery 1.
- the dimension W of the positive electrode tab side portion 43a in the second direction d2 is 100 mm or more.
- the first sandwiched area S1 can be sandwiched by the first sandwiched portion 61 over the entire area of the first sandwiched portion 61 in the second direction d2. Therefore, the pinching device 60 can hold the first pinched area S1 more firmly.
- the positive electrode tab side portion 43a faces the positive electrode connection region a1 of the positive electrode plate 10X.
- the sandwiching device 60 can sandwich the positive electrode connection region a1 of the positive electrode plate 10X via the first base material 41 and the second base material 42. it can. Therefore, the holding device 60 can hold the laminated battery 1 more firmly.
- the positive electrode active material layer 12X is not provided in the positive electrode connection region a1, even when the positive electrode connection region a1 is sandwiched by a predetermined pressing force, deterioration of the performance of the laminated battery 1 can be suppressed. it can.
- the dimension of the negative electrode tab side portion 43b in the first direction d1 is 20 mm or more.
- the laminated battery 1 can be provided with a second sandwiched area S2 for sandwiching by the sandwiching device 60. Therefore, when the laminated battery 1 is conveyed, both the first sandwiched area S1 and the second sandwiched area S2 can be sandwiched by the sandwiching device 60, and the laminated battery 1 can be held more firmly. Can be done.
- the dimension dx2 of the negative electrode tab side portion 43b in the first direction d1 is 100 mm or less. As a result, it is possible to suppress an increase in the area of the second sandwiched region S2 when viewed in the stacking direction dL. Therefore, it is possible to suppress a decrease in the energy density of the laminated battery 1.
- the dimension W of the negative electrode tab side portion 43b in the second direction d2 is 100 mm or more.
- the second sandwiched area S2 can be sandwiched by the second sandwiched portion 62 over the entire area of the second sandwiched portion 62 in the second direction d2. Therefore, the sandwiching device 60 can hold the second sandwiched area S2 more firmly.
- the negative electrode tab side portion 43b faces the negative electrode connection region a2 of the negative electrode plate 20Y.
- the sandwiching device 60 can sandwich the negative electrode connection region a2 of the negative electrode plate 20Y via the first base material 41 and the second base material 42. it can. Therefore, the holding device 60 can hold the laminated battery 1 more firmly.
- the negative electrode active material layer 22Y is not provided in the negative electrode connection region a2, it is possible to suppress the deterioration of the performance of the laminated battery 1 even when the negative electrode connection region a2 is sandwiched by a predetermined pressing force. it can.
- the first base material 41 and the second base material 42 include a metal layer 40a and a resin adhesive layer 40b provided on the inner surface of the metal layer 40a.
- the strength of the exterior body 40 may decrease. Therefore, when the bulging portion region SB of the laminated battery 1 having such an exterior body 40 is sandwiched by the sandwiching device 60, the portion located in the bulging portion 44 is more easily deformed.
- the first sandwiched region S1 can be sandwiched, so that the bulging portion region SB is formed. It is possible to avoid being pinched. As a result, deterioration of the performance of the laminated battery 1 can be suppressed.
- both the dimension dx1 of the positive electrode tab side portion 43a and the dimension dx2 of the negative electrode tab side portion 43b in the first direction d1 are 20 mm or more, and the first sandwiched area S1 and the second sandwiched area S1 and the second by the sandwiching device 60.
- An example of transporting the laminated battery 1 by sandwiching both of the sandwiched areas S2 is shown.
- the present invention is not limited to this, and if the sandwiching device 60 can sandwich only the first sandwiched area S1a and convey the laminated battery 1, the size of the negative electrode tab side portion 43b is not 20 mm or more. You may. Similarly, if the sandwiching device 60 can sandwich only the second sandwiched area S2 and convey the laminated battery 1, the size of the positive electrode tab side portion 43a does not have to be 20 mm or more.
- the sandwiching device 60 can sandwich the first sandwiched area S1 or the second sandwiched area S2, which reduces the performance of the laminated battery 1. It can be suppressed.
- the method for transporting the laminated battery includes an upright step, and after the laminated battery 1 is brought into an upright state in the upright step, the held area S1 of the laminated battery 1 is held in the holding step. , S2 is sandwiched.
- the method of transporting the laminated battery is not limited to this, and the method of transporting the laminated battery may not include an upright step.
- the sandwiched area S1 of the laminated battery 1 S2 may be sandwiched by the sandwiching device 60.
- the first sandwiched area S1 can be sandwiched by the sandwiching device 60, and the performance deterioration of the laminated battery 1 can be suppressed.
- first base material 41 and the second base material 42 are configured as separate bodies.
- first base material 41 and the second base material 42 may be integrally and continuously formed.
- first base material 41 and the second base material 42 may be continuously formed in a single sheet shape on one side in the second direction d2.
- the exterior body 40 may be formed by being bent at the boundary between the first base material 41 and the second base material 42.
- the seal portion 46 may not be formed on the bent portion.
- the dimension dx1 of the positive electrode tab side portion 43a in the first direction d1 is 20 mm or more
- the first sandwiched area S1 is transferred to the sandwiching device 60 when the laminated battery 1 is conveyed. Can be sandwiched, and deterioration of the performance of the laminated battery 1 can be suppressed.
- the second base material 42 is the first with respect to the peripheral portion 43'and the peripheral portion 43', similarly to the first base material 41. It may have a bulging portion 44'that bulges on the side opposite to the side of the base material 41 (the side of the metal layer 40a of the second base material 42).
- the peripheral portion 43'of the second base material 42 includes the positive electrode tab side portion 43a' extending inward from the outer edge 41a'(right side in FIG. 11) on the positive electrode tab 16 side in the first direction d1 and the first.
- the negative electrode tab side portion 43b'extending inward from the outer edge 41b'(left side in FIG. 11) on the negative electrode tab 26 side in the direction d1 may be included.
- the bulging portion 44' may be formed from the inner end 43e'of the positive electrode tab side portion 43a' to the inner end 43f' of the negative electrode tab side portion 43b'in the first direction d1.
- the dimension dx1'of the positive electrode tab side portion 43a'of the second base material 42 in the first direction d1 may be equal to the dimension dx1 of the positive electrode tab side portion 43a of the first base material 41.
- the dimension dx2'of the negative electrode tab side portion 43b'of the second base material 42 in the first direction d1 may be equal to the dimension dx2 of the negative electrode tab side portion 43a' of the first base material 41.
- the positive electrode tab side portion 43a'of the second base material 42 is located in the first sandwiched region S1
- the negative electrode tab side portion 43b' of the second base material 42 is located. It is located in the second pinched area S2.
- the bulging portion 44'of the second base material 42 is located in the bulging portion region SB.
- the present invention is not limited to this, and the dimension dx1'of the positive electrode tab side portion 43a'of the second base material 42 in the first direction d1 is larger than the dimension dx1 of the positive electrode tab side portion 43a of the first base material 41. May be large. Further, the dimension dx2'of the negative electrode tab side portion 43b'of the second base material 42 in the first direction d1 may also be larger than the dimension dx2 of the negative electrode tab side portion 43a' of the first base material 41.
- a part of the positive electrode tab side portion 43a'of the second base material 42 is located in the first sandwiched region S1, and the remaining portion is in the bulging portion region SB.
- a part of the negative electrode tab side portion 43b'of the second base material 42 is located in the second sandwiched region S2, and the remaining portion is in the bulging portion region SB.
- the bulging portion 44'of the second base material 42 is located in the bulging portion region SB.
- the dimension dx1 of the positive electrode tab side portion 43a in the first direction d1 is 20 mm or more. Therefore, when the laminated battery 1 is conveyed, the sandwiching device 60 can sandwich the first sandwiched region S1, and the performance deterioration of the laminated battery 1 can be suppressed.
- the sealing space 45 can be defined by both the bulging portion 44 of the first base material 41 and the bulging portion 44'of the second base material 42. Therefore, more electrode plates 10X and 20Y can be accommodated in the sealing space 45, and the capacity of the laminated battery 1 can be increased.
- the present invention is not limited to this, and the insulating sheet 31 may not be arranged between the positive electrode plate 10X and the negative electrode plate 20Y. Even in such a case, since at least one of the positive electrode plate 10X and the negative electrode plate 20Y has the functional layer 30A on the surface facing the other, the positive electrode plate 10X and the negative electrode plate 20Y are short-circuited. Can be prevented.
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Abstract
A stacked battery includes an exterior body having a first base material and a second base material, a membrane electrode assembly having a plurality of first electrode plates and a plurality of second electrode plates alternately stacked in a stacking direction, and a first tab connected to one side of the membrane electrode assembly in the first direction when viewed in the stacking direction. The first base material includes a first tab side portion extending inward from the outer edge on the first tab side in the first direction, and a bulging portion that bulges to the side opposite to the side of the second base material with respect to the first tab side portion from the inner end of the first tab side portion in the first direction. The weight of the stacked battery is 500 g or more, and the dimension of the first tab side portion in the first direction is 20 mm or more.
Description
本発明は、積層型電池および積層型電池の搬送方法に関する。
The present invention relates to a laminated battery and a method for transporting the laminated battery.
例えば特許文献１で提案されているように、正極板と負極板とを交互に積層してなる積層型電池が広く普及している。積層型電池の一例として、リチウムイオン二次電池が例示され得る。リチウムイオン二次電池は、他の形式の積層型電池と比較して大容量であることを特徴の一つとしている。このような特徴を有するリチウムイオン二次電池は、今般、車載用途や定置住宅用途等の種々の用途での更なる普及を期待されている。
For example, as proposed in Patent Document 1, a laminated battery in which positive electrode plates and negative electrode plates are alternately laminated is widely used. As an example of the laminated battery, a lithium ion secondary battery can be exemplified. One of the features of the lithium-ion secondary battery is that it has a larger capacity than other types of stacked batteries. Lithium-ion secondary batteries having such characteristics are expected to be further spread in various applications such as in-vehicle applications and stationary housing applications.
積層型電池は、積層方向に交互に積層された複数の正極板（第１電極板）および複数の負極板（第２電極板）を有する膜電極接合体を備えている。積層型電池の製造時において、膜電極接合体は、外装体内に電解液とともに封止される。その後、積層型電池は、起立状態で、外装体の膨出部が位置する膨出部領域が挟持装置により挟持されながら吊り下げられて搬送される。
The laminated battery includes a membrane electrode assembly having a plurality of positive electrode plates (first electrode plates) and a plurality of negative electrode plates (second electrode plates) alternately laminated in the stacking direction. At the time of manufacturing the laminated battery, the membrane electrode assembly is sealed in the outer body together with the electrolytic solution. After that, the laminated battery is suspended and conveyed in an upright state while the bulging portion region where the bulging portion of the exterior body is located is sandwiched by the sandwiching device.
しかしながら、重量の大きな積層型電池を搬送する場合、挟持装置による膨出部領域への押圧力が高まり、膜電極接合体のうち膨出部内に位置する部分（例えば、電極活物質層）が変形するおそれがある。この場合、反応ムラが生じ、積層型電池の性能が低下するおそれがある。
However, when a heavy laminated battery is transported, the pressing force on the bulging portion region by the sandwiching device increases, and the portion of the membrane electrode assembly located inside the bulging portion (for example, the electrode active material layer) is deformed. There is a risk of In this case, uneven reaction may occur and the performance of the laminated battery may deteriorate.
本発明は、このような点を考慮してなされたものであり、積層型電池の性能低下を抑制することができる積層型電池および積層型電池の搬送方法を提供することを目的とする。
The present invention has been made in consideration of such a point, and an object of the present invention is to provide a laminated battery and a method for transporting the laminated battery, which can suppress deterioration of the performance of the laminated battery.
本発明による積層型電池は、
積層型電池であって、
第１基材と第２基材とを有し、前記第１基材と前記第２基材との間に封止空間を形成する外装体と、
前記封止空間に設けられた膜電極接合体であって、積層方向に交互に積層された複数の第１電極板および複数の第２電極板を有する膜電極接合体と、
前記積層方向で見たときの第１方向において前記膜電極接合体の一側に接続され、前記第１方向において前記外装体の外側に延び出た第１タブと、を備え、
前記第１基材は、前記第１方向において前記第１タブの側の外端縁から内側に延びる第１タブ側部と、前記第１タブ側部の前記第１方向における内端から前記第１タブ側部に対して前記第２基材の側とは反対側に膨出し、前記封止空間を画定する膨出部と、を含み、
前記積層型電池の重量は、５００ｇ以上であり、
前記第１方向における前記第１タブ側部の寸法は、２０ｍｍ以上である。 The laminated battery according to the present invention
It ’s a stacked battery,
An exterior body having a first base material and a second base material and forming a sealing space between the first base material and the second base material,
A membrane electrode assembly provided in the sealing space, the membrane electrode assembly having a plurality of first electrode plates and a plurality of second electrode plates alternately laminated in the stacking direction.
A first tab connected to one side of the membrane electrode assembly in the first direction when viewed in the stacking direction and extending to the outside of the exterior body in the first direction is provided.
The first base material is the first tab side portion extending inward from the outer edge on the side of the first tab in the first direction, and the first base material from the inner end of the first tab side portion in the first direction. The tab side portion includes a bulging portion that bulges on the side opposite to the side of the second base material and defines the sealing space.
The weight of the laminated battery is 500 g or more, and the weight is 500 g or more.
The dimension of the first tab side portion in the first direction is 20 mm or more.
積層型電池であって、
第１基材と第２基材とを有し、前記第１基材と前記第２基材との間に封止空間を形成する外装体と、
前記封止空間に設けられた膜電極接合体であって、積層方向に交互に積層された複数の第１電極板および複数の第２電極板を有する膜電極接合体と、
前記積層方向で見たときの第１方向において前記膜電極接合体の一側に接続され、前記第１方向において前記外装体の外側に延び出た第１タブと、を備え、
前記第１基材は、前記第１方向において前記第１タブの側の外端縁から内側に延びる第１タブ側部と、前記第１タブ側部の前記第１方向における内端から前記第１タブ側部に対して前記第２基材の側とは反対側に膨出し、前記封止空間を画定する膨出部と、を含み、
前記積層型電池の重量は、５００ｇ以上であり、
前記第１方向における前記第１タブ側部の寸法は、２０ｍｍ以上である。 The laminated battery according to the present invention
It ’s a stacked battery,
An exterior body having a first base material and a second base material and forming a sealing space between the first base material and the second base material,
A membrane electrode assembly provided in the sealing space, the membrane electrode assembly having a plurality of first electrode plates and a plurality of second electrode plates alternately laminated in the stacking direction.
A first tab connected to one side of the membrane electrode assembly in the first direction when viewed in the stacking direction and extending to the outside of the exterior body in the first direction is provided.
The first base material is the first tab side portion extending inward from the outer edge on the side of the first tab in the first direction, and the first base material from the inner end of the first tab side portion in the first direction. The tab side portion includes a bulging portion that bulges on the side opposite to the side of the second base material and defines the sealing space.
The weight of the laminated battery is 500 g or more, and the weight is 500 g or more.
The dimension of the first tab side portion in the first direction is 20 mm or more.
本発明による積層型電池において、
前記第１方向における前記第１タブ側部の寸法は、１００ｍｍ以下である、
ようにしてもよい。 In the laminated battery according to the present invention
The dimension of the first tab side portion in the first direction is 100 mm or less.
You may do so.
前記第１方向における前記第１タブ側部の寸法は、１００ｍｍ以下である、
ようにしてもよい。 In the laminated battery according to the present invention
The dimension of the first tab side portion in the first direction is 100 mm or less.
You may do so.
本発明による積層型電池において、
前記積層方向で見たときに前記第１方向に直交する第２方向における前記第１タブ側部の寸法は、１００ｍｍ以上である、
ようにしてもよい。 In the laminated battery according to the present invention
The dimension of the first tab side portion in the second direction orthogonal to the first direction when viewed in the stacking direction is 100 mm or more.
You may do so.
前記積層方向で見たときに前記第１方向に直交する第２方向における前記第１タブ側部の寸法は、１００ｍｍ以上である、
ようにしてもよい。 In the laminated battery according to the present invention
The dimension of the first tab side portion in the second direction orthogonal to the first direction when viewed in the stacking direction is 100 mm or more.
You may do so.
本発明による積層型電池において、
前記第１電極板は、互いに隣接する第１接続領域および第１有効領域を含む第１電極集電体と、前記第１有効領域に設けられた第１電極活物質層と、を含み、
前記第１タブ側部は、前記第１電極板の前記第１接続領域に対向している、
ようにしてもよい。 In the laminated battery according to the present invention
The first electrode plate includes a first electrode current collector including a first connection region and a first effective region adjacent to each other, and a first electrode active material layer provided in the first effective region.
The first tab side portion faces the first connection region of the first electrode plate.
You may do so.
前記第１電極板は、互いに隣接する第１接続領域および第１有効領域を含む第１電極集電体と、前記第１有効領域に設けられた第１電極活物質層と、を含み、
前記第１タブ側部は、前記第１電極板の前記第１接続領域に対向している、
ようにしてもよい。 In the laminated battery according to the present invention
The first electrode plate includes a first electrode current collector including a first connection region and a first effective region adjacent to each other, and a first electrode active material layer provided in the first effective region.
The first tab side portion faces the first connection region of the first electrode plate.
You may do so.
本発明による積層型電池において、
前記第１方向において前記膜電極接合体の他側に接続され、前記第１方向において前記外装体の外側に延び出た第２タブを更に備え、
前記第１基材は、前記第１方向において前記第２タブの側の外端縁から内側に延びる第２タブ側部を含み、
前記膨出部は、前記第１方向において前記第１タブ側部の内端から前記第２タブ側部の内端にわたって形成され、
前記第１方向における前記第２タブ側部の寸法は、２０ｍｍ以上である、
ようにしてもよい。 In the laminated battery according to the present invention
Further comprising a second tab connected to the other side of the membrane electrode assembly in the first direction and extending outward of the exterior in the first direction.
The first substrate includes a second tab side portion extending inward from the outer edge on the side of the second tab in the first direction.
The bulging portion is formed from the inner end of the first tab side portion to the inner end of the second tab side portion in the first direction.
The dimension of the second tab side portion in the first direction is 20 mm or more.
You may do so.
前記第１方向において前記膜電極接合体の他側に接続され、前記第１方向において前記外装体の外側に延び出た第２タブを更に備え、
前記第１基材は、前記第１方向において前記第２タブの側の外端縁から内側に延びる第２タブ側部を含み、
前記膨出部は、前記第１方向において前記第１タブ側部の内端から前記第２タブ側部の内端にわたって形成され、
前記第１方向における前記第２タブ側部の寸法は、２０ｍｍ以上である、
ようにしてもよい。 In the laminated battery according to the present invention
Further comprising a second tab connected to the other side of the membrane electrode assembly in the first direction and extending outward of the exterior in the first direction.
The first substrate includes a second tab side portion extending inward from the outer edge on the side of the second tab in the first direction.
The bulging portion is formed from the inner end of the first tab side portion to the inner end of the second tab side portion in the first direction.
The dimension of the second tab side portion in the first direction is 20 mm or more.
You may do so.
本発明による積層型電池において、
前記第１方向における前記第２タブ側部の寸法は、１００ｍｍ以下である、
ようにしてもよい。 In the laminated battery according to the present invention
The dimension of the second tab side portion in the first direction is 100 mm or less.
You may do so.
前記第１方向における前記第２タブ側部の寸法は、１００ｍｍ以下である、
ようにしてもよい。 In the laminated battery according to the present invention
The dimension of the second tab side portion in the first direction is 100 mm or less.
You may do so.
本発明による積層型電池において、
前記積層方向で見たときに前記第１方向に直交する第２方向における前記第２タブ側部の寸法は、１００ｍｍ以上である、
ようにしてもよい。 In the laminated battery according to the present invention
The dimension of the second tab side portion in the second direction orthogonal to the first direction when viewed in the stacking direction is 100 mm or more.
You may do so.
前記積層方向で見たときに前記第１方向に直交する第２方向における前記第２タブ側部の寸法は、１００ｍｍ以上である、
ようにしてもよい。 In the laminated battery according to the present invention
The dimension of the second tab side portion in the second direction orthogonal to the first direction when viewed in the stacking direction is 100 mm or more.
You may do so.
本発明による積層型電池において、
前記第２電極板は、互いに隣接する第２接続領域および第２有効領域を含む第２電極集電体と、前記第２有効領域に設けられた第２電極活物質層と、を含み、
前記第２タブ側部は、前記第２電極板の前記第２接続領域に対向している、
ようにしてもよい。 In the laminated battery according to the present invention
The second electrode plate includes a second electrode current collector including a second connection region and a second effective region adjacent to each other, and a second electrode active material layer provided in the second effective region.
The second tab side portion faces the second connection region of the second electrode plate.
You may do so.
前記第２電極板は、互いに隣接する第２接続領域および第２有効領域を含む第２電極集電体と、前記第２有効領域に設けられた第２電極活物質層と、を含み、
前記第２タブ側部は、前記第２電極板の前記第２接続領域に対向している、
ようにしてもよい。 In the laminated battery according to the present invention
The second electrode plate includes a second electrode current collector including a second connection region and a second effective region adjacent to each other, and a second electrode active material layer provided in the second effective region.
The second tab side portion faces the second connection region of the second electrode plate.
You may do so.
本発明による積層型電池において、
前記第１基材および前記第２基材は、金属層と、前記金属層の内面に設けられた樹脂接着層と、をそれぞれ含み、
前記第１基材の前記膨出部および前記第１タブ側部は、前記金属層および前記樹脂接着層で構成されている、
ようにしてもよい。 In the laminated battery according to the present invention
The first base material and the second base material each include a metal layer and a resin adhesive layer provided on the inner surface of the metal layer.
The bulging portion and the first tab side portion of the first base material are composed of the metal layer and the resin adhesive layer.
You may do so.
前記第１基材および前記第２基材は、金属層と、前記金属層の内面に設けられた樹脂接着層と、をそれぞれ含み、
前記第１基材の前記膨出部および前記第１タブ側部は、前記金属層および前記樹脂接着層で構成されている、
ようにしてもよい。 In the laminated battery according to the present invention
The first base material and the second base material each include a metal layer and a resin adhesive layer provided on the inner surface of the metal layer.
The bulging portion and the first tab side portion of the first base material are composed of the metal layer and the resin adhesive layer.
You may do so.
本発明による積層型電池の搬送方法は、
上述した積層型電池を準備する準備工程と、
前記積層方向で見たときに前記積層型電池のうち前記第１タブ側部と重なる領域として画定される被挟持領域を、挟持装置により挟持する挟持工程と、
前記挟持装置により前記被挟持領域を挟持しながら前記積層型電池を吊り下げて搬送する搬送工程と、を備える。 The method for transporting a laminated battery according to the present invention is as follows.
The preparatory process for preparing the above-mentioned laminated battery and
A sandwiching step of sandwiching a sandwiched area defined as an area overlapping the first tab side portion of the laminated battery when viewed in the stacking direction by a sandwiching device.
A transfer step of suspending and transporting the laminated battery while sandwiching the sandwiched area by the sandwiching device is provided.
上述した積層型電池を準備する準備工程と、
前記積層方向で見たときに前記積層型電池のうち前記第１タブ側部と重なる領域として画定される被挟持領域を、挟持装置により挟持する挟持工程と、
前記挟持装置により前記被挟持領域を挟持しながら前記積層型電池を吊り下げて搬送する搬送工程と、を備える。 The method for transporting a laminated battery according to the present invention is as follows.
The preparatory process for preparing the above-mentioned laminated battery and
A sandwiching step of sandwiching a sandwiched area defined as an area overlapping the first tab side portion of the laminated battery when viewed in the stacking direction by a sandwiching device.
A transfer step of suspending and transporting the laminated battery while sandwiching the sandwiched area by the sandwiching device is provided.
本発明による積層型電池の搬送方法において
前記挟持工程の前に前記積層型電池を起立させる起立工程を更に備える、
ようにしてもよい。 The method for transporting a laminated battery according to the present invention further includes an erecting step for erecting the laminated battery before the sandwiching step.
You may do so.
前記挟持工程の前に前記積層型電池を起立させる起立工程を更に備える、
ようにしてもよい。 The method for transporting a laminated battery according to the present invention further includes an erecting step for erecting the laminated battery before the sandwiching step.
You may do so.
本発明によれば、積層型電池の性能低下を抑制することができる。
According to the present invention, deterioration of the performance of the laminated battery can be suppressed.
以下、図面を参照して本発明の実施の形態について説明する。なお、本件明細書に添付する図面においては、理解のしやすさの便宜上、適宜縮尺および縦横の寸法比等を、実物のそれらから変更し誇張してある。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, the scale, aspect ratio, etc. are appropriately changed from those of the actual product and exaggerated for the sake of ease of understanding.
［積層型電池］
図１～図６は、本発明の実施の形態による積層型電池を説明するための図である。 [Stacked battery]
1 to 6 are diagrams for explaining a laminated battery according to an embodiment of the present invention.
図１～図６は、本発明の実施の形態による積層型電池を説明するための図である。 [Stacked battery]
1 to 6 are diagrams for explaining a laminated battery according to an embodiment of the present invention.
図１および図２に示すように、本実施の形態による積層型電池１は、外装体４０と、外装体４０内に収容された膜電極接合体５と、膜電極接合体５に接続された一対のタブ１６，２６と、を備えている。タブ１６，２６は、外装体４０の外側に延び出ている。電気自動車等の自動車の分野においては、複数の積層型電池１を組み合わせることにより構成されるモジュールが自動車に搭載される。複数の積層型電池１の間の電気的な接続は、タブ１６，２６を介して実現される。
As shown in FIGS. 1 and 2, the laminated battery 1 according to the present embodiment is connected to the exterior body 40, the membrane electrode assembly 5 housed in the exterior body 40, and the membrane electrode assembly 5. It includes a pair of tabs 16 and 26. The tabs 16 and 26 extend to the outside of the exterior body 40. In the field of automobiles such as electric vehicles, a module composed of a combination of a plurality of laminated batteries 1 is mounted on the automobile. The electrical connection between the plurality of stacked batteries 1 is realized via the tabs 16 and 26.
以下、積層型電池１の各構成要素について説明する。
Hereinafter, each component of the laminated battery 1 will be described.
（膜電極接合体）
膜電極接合体５は、積層方向ｄＬに交互に積層された正極板１０Ｘ（第１電極板）および負極板２０Ｙ（第２電極板）を含む複数の電極板１０Ｘ，２０Ｙを有している。 (Membrane electrode assembly)
Themembrane electrode assembly 5 has a plurality of electrode plates 10X and 20Y including a positive electrode plate 10X (first electrode plate) and a negative electrode plate 20Y (second electrode plate) alternately laminated in the stacking direction dL.
膜電極接合体５は、積層方向ｄＬに交互に積層された正極板１０Ｘ（第１電極板）および負極板２０Ｙ（第２電極板）を含む複数の電極板１０Ｘ，２０Ｙを有している。 (Membrane electrode assembly)
The
本実施の形態においては、膜電極接合体５がリチウムイオン二次電池を構成する例について説明する。この例において、第１電極板は正極板１０Ｘを構成し、第２電極板は負極板２０Ｙを構成するものとする。ただし、以下に説明する作用効果の記載からも理解され得るように、第１電極板が負極板２０Ｙを構成し、第２電極板が正極板１０Ｘを構成してもよい。更には、リチウムイオン二次電池に限定されることなく、第１電極板および第２電極板を交互に積層してなる膜電極接合体５に広く適用され得る。
In the present embodiment, an example in which the membrane electrode assembly 5 constitutes a lithium ion secondary battery will be described. In this example, the first electrode plate constitutes the positive electrode plate 10X, and the second electrode plate constitutes the negative electrode plate 20Y. However, as can be understood from the description of the action and effect described below, the first electrode plate may form the negative electrode plate 20Y, and the second electrode plate may form the positive electrode plate 10X. Further, the present invention is not limited to the lithium ion secondary battery, and can be widely applied to the membrane electrode assembly 5 in which the first electrode plate and the second electrode plate are alternately laminated.
図２～図４に示すように、膜電極接合体５は、複数の正極板１０Ｘおよび複数の負極板２０Ｙを有している。正極板１０Ｘおよび負極板２０Ｙは、積層方向ｄＬに沿って交互に配列されて積層されている。本実施の形態においては、積層方向ｄＬにおける膜電極接合体５の最下部および最上部に、負極板２０Ｙが配置されている。膜電極接合体５および積層型電池１は、全体的に偏平形状を有し、積層方向ｄＬへの厚さが薄く、積層方向ｄＬに直交する方向ｄ１，ｄ２に広がっている。
As shown in FIGS. 2 to 4, the membrane electrode assembly 5 has a plurality of positive electrode plates 10X and a plurality of negative electrode plates 20Y. The positive electrode plate 10X and the negative electrode plate 20Y are alternately arranged and laminated along the stacking direction dL. In the present embodiment, the negative electrode plates 20Y are arranged at the lowermost and uppermost portions of the membrane electrode assembly 5 in the stacking direction dL. The membrane electrode assembly 5 and the laminated battery 1 have a flat shape as a whole, have a thin thickness in the stacking direction dL, and spread in the directions d1 and d2 orthogonal to the stacking direction dL.
正極板１０Ｘおよび負極板２０Ｙは、積層方向ｄＬで見たときに、任意の形状を有していてもよい。図示するように、正極板１０Ｘおよび負極板２０Ｙは、積層方向ｄＬで見たときに、全体的に長方形形状の外輪郭を有していてもよい。積層型電池１は、一対のタブ１６，２６が配列される方向である第１方向ｄ１と、第１方向ｄ１に直交する第２方向ｄ２と、を有している。図示された例においては、第１方向ｄ１が、積層型電池１の長手方向（長さ方向）に相当し、第２方向ｄ２が、積層型電池１の短手方向（幅方向）に相当する。しかしながら、第１方向ｄ１が、積層型電池１の短手方向に相当し、第２方向ｄ２が、積層型電池１の長手方向に相当するようにしてもよい。積層方向ｄＬは、第１方向ｄ１および第２方向ｄ２の両方に直交している。正極板１０Ｘおよび負極板２０Ｙは、第１方向ｄ１にずらして配置されている。より具体的には、複数の正極板１０Ｘは、第１方向ｄ１における一側（図３における右側）に寄って配置され、複数の負極板２０Ｙは、第１方向ｄ１における他側（図３における左側）に寄って配置されている。正極板１０Ｘおよび負極板２０Ｙは、第１方向ｄ１における中央部（後述する正極有効領域ｂ１および負極有効領域ｂ２）において、積層方向ｄＬに重なり合っている。
The positive electrode plate 10X and the negative electrode plate 20Y may have any shape when viewed in the stacking direction dL. As shown in the figure, the positive electrode plate 10X and the negative electrode plate 20Y may have an outer contour having a rectangular shape as a whole when viewed in the stacking direction dL. The laminated battery 1 has a first direction d1 in which a pair of tabs 16 and 26 are arranged, and a second direction d2 orthogonal to the first direction d1. In the illustrated example, the first direction d1 corresponds to the longitudinal direction (length direction) of the laminated battery 1, and the second direction d2 corresponds to the lateral direction (width direction) of the laminated battery 1. .. However, the first direction d1 may correspond to the lateral direction of the laminated battery 1, and the second direction d2 may correspond to the longitudinal direction of the laminated battery 1. The stacking direction dL is orthogonal to both the first direction d1 and the second direction d2. The positive electrode plate 10X and the negative electrode plate 20Y are arranged so as to be offset in the first direction d1. More specifically, the plurality of positive electrode plates 10X are arranged closer to one side in the first direction d1 (right side in FIG. 3), and the plurality of negative electrode plates 20Y are arranged on the other side in the first direction d1 (in FIG. 3). It is located closer to the left side). The positive electrode plate 10X and the negative electrode plate 20Y overlap in the stacking direction dL in the central portion (positive electrode effective region b1 and negative electrode effective region b2 described later) in the first direction d1.
正極板１０Ｘは、図示するように、シート状の外形状を有している。正極板１０Ｘは、正極集電体１１Ｘ（第１電極集電体）と、正極集電体１１Ｘ上に設けられた正極活物質層１２Ｘ（第１電極活物質層）と、を有している。正極活物質層１２Ｘは、任意の形状を有していてもよいが、図示するように、長方形形状の外輪郭を有していてもよい。リチウムイオン二次電池において、正極板１０Ｘは、放電時にリチウムイオンを吸蔵し、充電時にリチウムイオンを放出する。
As shown in the figure, the positive electrode plate 10X has a sheet-like outer shape. The positive electrode plate 10X has a positive electrode current collector 11X (first electrode current collector) and a positive electrode active material layer 12X (first electrode active material layer) provided on the positive electrode current collector 11X. .. The positive electrode active material layer 12X may have an arbitrary shape, but may have a rectangular outer contour as shown in the figure. In the lithium ion secondary battery, the positive electrode plate 10X occludes lithium ions during discharging and releases lithium ions during charging.
正極集電体１１Ｘは、互いに反対側に位置する第１面１１ａおよび第２面１１ｂを主面として有している。正極活物質層１２Ｘは、正極集電体１１Ｘの第１面１１ａおよび第２面１１ｂの少なくとも一方の面上に形成される。本実施の形態においては、各正極板１０Ｘの正極集電体１１Ｘの両側に、正極活物質層１２Ｘがそれぞれ設けられており、各正極板１０Ｘは、互いに同一に構成され得る。
The positive electrode current collector 11X has a first surface 11a and a second surface 11b located on opposite sides of each other as main surfaces. The positive electrode active material layer 12X is formed on at least one surface of the first surface 11a and the second surface 11b of the positive electrode current collector 11X. In the present embodiment, the positive electrode active material layers 12X are provided on both sides of the positive electrode current collector 11X of each positive electrode plate 10X, and the positive electrode plates 10X can be configured to be the same as each other.
正極集電体１１Ｘおよび正極活物質層１２Ｘは、積層型電池１（リチウムイオン二次電池）に適用され得る種々の材料を用いて種々の製法により、作製され得る。一例として、正極集電体１１Ｘは、アルミニウム箔、または高導電性のカーボン粒子もしくはカーボンナノチューブを塗布したアルミニウム箔によって形成され得る。正極活物質層１２Ｘは、例えば、正極活物質、導電助剤、およびバインダーとなる結着剤を含んでいてもよい。正極活物質層１２Ｘは、正極活物質、導電助剤および結着剤を溶媒に分散させてなる正極用スラリーを、正極集電体１１Ｘをなす材料上に塗工し、続いて乾燥し、その後プレスして高密度化することで、作製され得る。正極活物質は、遷移金属とリチウムを含有していてもよく、１種の遷移金属とリチウムを含有していてもよい。正極活物質としては、例えば、リチウム遷移金属複合酸化物、リチウム含有遷移金属リン酸化合物等が挙げられ、これらを混合して用いてもよい。リチウム遷移金属複合酸化物の遷移金属としては、バナジウム、チタン、クロム、マンガン、鉄、コバルト、ニッケル、銅等であってもよい。リチウム遷移金属複合酸化物の具体例としては、ＬｉＣｏＯ２等のリチウムコバルト複合酸化物、ＬｉＮｉＯ２等のリチウムニッケル複合酸化物、ＬｉＭｎＯ２、ＬｉＭｎ２Ｏ４、Ｌｉ２ＭｎＯ３等のリチウムマンガン複合酸化物、これらのリチウム遷移金属複合酸化物の主体となる遷移金属原子の一部をアルミニウム、チタン、バナジウム、クロム、マンガン、鉄、コバルト、ニッケル、銅、亜鉛、マグネシウム、ガリウム、ジルコニウム等の他の金属で置換した置換物等が挙げられる。当該置換物の具体例としては、例えば、ＬｉＮｉ０．５Ｍｎ０．５Ｏ２、ＬｉＮｉ０．８０Ｃｏ０．１７Ａｌ０．０３Ｏ２、ＬｉＮｉ１／３Ｃｏ１／３Ｍｎ１／３Ｏ２、ＬｉＭｎ１．８Ａｌ０．２Ｏ４、ＬｉＭｎ１．５Ｎｉ０．５Ｏ４等が挙げられる。また、リチウム含有遷移金属リン酸化合物の遷移金属としては、バナジウム、チタン、マンガン、鉄、コバルト、ニッケル等であってもよく、具体例としては、例えば、ＬｉＦｅＰＯ４等のリン酸鉄類、ＬｉＣｏＰＯ４等のリン酸コバルト類、これらのリチウム遷移金属リン酸化合物の主体となる遷移金属原子の一部をアルミニウム、チタン、バナジウム、クロム、マンガン、鉄、コバルト、ニッケル、銅、亜鉛、マグネシウム、ガリウム、ジルコニウム、ニオブ等の他の金属で置換した置換物等が挙げられる。導電助剤としては、グラファイトの微粒子、アセチレンブラック、ケッチェンブラック等のカーボンブラック、ニードルコークス等の無定形炭素の微粒子等、カーボンナノファイバー等が使用されるが、これらに限定されない。結着剤としては、ポリフッ化ビニリデン等のフッ素樹脂が用いられ得る。
The positive electrode current collector 11X and the positive electrode active material layer 12X can be produced by various manufacturing methods using various materials that can be applied to the laminated battery 1 (lithium ion secondary battery). As an example, the positive electrode current collector 11X can be formed of an aluminum foil or an aluminum foil coated with highly conductive carbon particles or carbon nanotubes. The positive electrode active material layer 12X may contain, for example, a positive electrode active material, a conductive auxiliary agent, and a binder serving as a binder. In the positive electrode active material layer 12X, a positive electrode slurry formed by dispersing a positive electrode active material, a conductive auxiliary agent and a binder in a solvent is applied onto a material forming the positive electrode current collector 11X, and then dried, and then dried. It can be produced by pressing to increase the density. The positive electrode active material may contain a transition metal and lithium, or may contain one kind of transition metal and lithium. Examples of the positive electrode active material include a lithium transition metal composite oxide, a lithium-containing transition metal phosphoric acid compound, and the like, and these may be mixed and used. The transition metal of the lithium transition metal composite oxide may be vanadium, titanium, chromium, manganese, iron, cobalt, nickel, copper or the like. Specific examples of the lithium transition metal composite oxide include a lithium cobalt composite oxide such as LiCoO 2 , a lithium nickel composite oxide such as LiNiO 2 , and a lithium manganese composite oxide such as LiMnO 2 , LiMn 2 O 4 , and Li 2 MnO 3. Others such as aluminum, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, magnesium, gallium, zirconium, etc. Examples thereof include a substitute substituted with a metal. Specific examples of the substitution product include, for example, LiNi 0.5 Mn 0.5 O 2 , LiNi 0.80 Co 0.17 Al 0.03 O 2 , LiNi 1/3 Co 1/3 Mn 1/3 O. 2 , LiMn 1.8 Al0.2 O 4 , LiMn 1.5 Ni 0.5 O 4, and the like can be mentioned. The transition metal of the lithium-containing transition metal phosphoric acid compound may be vanadium, titanium, manganese, iron, cobalt, nickel or the like, and specific examples thereof include iron phosphates such as LiFePO 4 and LiCoPO. Cobalt phosphates such as 4 and some of the transition metal atoms that are the main constituents of these lithium transition metal phosphate compounds are aluminum, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, magnesium, gallium. , Substituents substituted with other metals such as zirconium, niobium and the like. As the conductive auxiliary agent, fine particles of graphite, carbon black such as acetylene black and Ketjen black, fine particles of amorphous carbon such as needle coke, carbon nanofibers and the like are used, but the present invention is not limited thereto. As the binder, a fluororesin such as polyvinylidene fluoride can be used.
図３に示すように、正極集電体１１Ｘは、互いに隣接する正極接続領域ａ１（第１接続領域）および正極有効領域ｂ１（第１有効領域）を有している。正極活物質層１２Ｘは、正極集電体１１Ｘの正極有効領域ｂ１のみに配置されている。正極有効領域ｂ１は、任意の形状を有していてもよい。図示するように、正極有効領域ｂ１は、長方形形状の外輪郭を有していてもよく、全体的に正極活物質層１２Ｘが設けられた領域になっていてもよい。正極接続領域ａ１および正極有効領域ｂ１は、正極板１０Ｘの第１方向ｄ１に配列されている。正極接続領域ａ１は、正極有効領域ｂ１よりも正極板１０Ｘの第１方向ｄ１における外側（図３における右側）に位置している。
As shown in FIG. 3, the positive electrode current collector 11X has a positive electrode connection region a1 (first connection region) and a positive electrode effective region b1 (first effective region) adjacent to each other. The positive electrode active material layer 12X is arranged only in the positive electrode effective region b1 of the positive electrode current collector 11X. The positive electrode effective region b1 may have an arbitrary shape. As shown in the figure, the positive electrode effective region b1 may have a rectangular outer contour, or may be a region provided with the positive electrode active material layer 12X as a whole. The positive electrode connection region a1 and the positive electrode effective region b1 are arranged in the first direction d1 of the positive electrode plate 10X. The positive electrode connection region a1 is located outside the positive electrode plate 10X in the first direction d1 (right side in FIG. 3) with respect to the positive electrode effective region b1.
各々の正極集電体１１Ｘの正極接続領域ａ１によって、正極接続部１３（第１接続部）が構成されている。正極接続部１３は、第１基材４１の側の面である第１面１３ａと、第２基材４２の側の面である第２面１３ｂと、を有している。第１面１３ａは、複数の正極集電体１１Ｘのうち最も第１基材４１の側に配置された正極集電体１１Ｘの正極接続領域ａ１における第１面１１ａに相当する。また、第２面１３ｂは、複数の正極集電体１１Ｘのうち最も第２基材４２の側に配置された正極集電体１１Ｘの正極接続領域ａ１における第２面１１ｂに相当する。本実施の形態においては、第２面１３ｂに、正極タブ１６（第１タブ）が接合されている（図６参照）。正極タブ１６は、抵抗溶接や超音波溶接、テープによる貼着、溶着等によって第２面１３ｂに接合されている。また、各々の正極集電体１１Ｘも、正極タブ１６が第２面１３ｂに接合された位置において、互いに接合されている。これにより、各々の正極集電体１１Ｘと正極タブ１６とが電気的に接続されている。
The positive electrode connection portion 13 (first connection portion) is configured by the positive electrode connection region a1 of each positive electrode current collector 11X. The positive electrode connecting portion 13 has a first surface 13a, which is a side surface of the first base material 41, and a second surface 13b, which is a side surface of the second base material 42. The first surface 13a corresponds to the first surface 11a in the positive electrode connection region a1 of the positive electrode current collector 11X arranged on the side of the first base material 41 among the plurality of positive electrode current collectors 11X. Further, the second surface 13b corresponds to the second surface 11b in the positive electrode connection region a1 of the positive electrode current collector 11X arranged closest to the second base material 42 among the plurality of positive electrode current collectors 11X. In the present embodiment, the positive electrode tab 16 (first tab) is joined to the second surface 13b (see FIG. 6). The positive electrode tab 16 is bonded to the second surface 13b by resistance welding, ultrasonic welding, tape bonding, welding, or the like. Further, each positive electrode current collector 11X is also joined to each other at a position where the positive electrode tab 16 is joined to the second surface 13b. As a result, each positive electrode current collector 11X and the positive electrode tab 16 are electrically connected.
一方、図３に示すように、正極有効領域ｂ１は、積層方向ｄＬで見たときに、負極板２０Ｙの後述する負極活物質層２２Ｙに対向する領域内に設けられている。このため、第１方向ｄ１における正極板１０Ｘの正極有効領域ｂ１の寸法は、第１方向ｄ１における負極板２０Ｙの後述する負極有効領域ｂ２の寸法よりも小さくなっている。また、第２方向ｄ２における正極板１０Ｘの寸法は、第２方向ｄ２における負極板２０Ｙの寸法よりも小さくなっている。このような正極有効領域ｂ１の配置により、負極活物質層２２Ｙからのリチウムの析出を防止することができる。
On the other hand, as shown in FIG. 3, the positive electrode effective region b1 is provided in the region of the negative electrode plate 20Y facing the negative electrode active material layer 22Y, which will be described later, when viewed in the stacking direction dL. Therefore, the size of the positive electrode effective region b1 of the positive electrode plate 10X in the first direction d1 is smaller than the size of the negative electrode effective region b2 of the negative electrode plate 20Y in the first direction d1 which will be described later. Further, the size of the positive electrode plate 10X in the second direction d2 is smaller than the size of the negative electrode plate 20Y in the second direction d2. By arranging the positive electrode effective region b1 in this way, it is possible to prevent the precipitation of lithium from the negative electrode active material layer 22Y.
本実施の形態においては、正極板１０Ｘは、比較的大きなサイズを有しており、第１方向ｄ１における正極板１０Ｘの寸法は、１８０ｍｍ以上であってもよい。第１方向ｄ１における正極板１０Ｘの正極有効領域ｂ１の寸法は、１５０ｍｍ以上であってもよい。また、第２方向ｄ２における正極板１０Ｘの寸法は、８０ｍｍ以上であってもよい。
In the present embodiment, the positive electrode plate 10X has a relatively large size, and the size of the positive electrode plate 10X in the first direction d1 may be 180 mm or more. The size of the positive electrode effective region b1 of the positive electrode plate 10X in the first direction d1 may be 150 mm or more. Further, the size of the positive electrode plate 10X in the second direction d2 may be 80 mm or more.
次に、負極板２０Ｙについて説明する。負極板２０Ｙも、正極板１０Ｘと同様に、シート状の外形状を有している。負極板２０Ｙは、負極集電体２１Ｙ（第２電極集電体）と、負極集電体２１Ｙ上に設けられた負極活物質層２２Ｙ（第２電極活物質層）と、を有している。負極活物質層２２Ｙは、任意の形状を有していてもよいが、図示するように、長方形形状の外輪郭を有していてもよい。リチウムイオン二次電池において、負極板２０Ｙは、放電時にリチウムイオンを放出し、充電時にリチウムイオンを吸蔵する。
Next, the negative electrode plate 20Y will be described. The negative electrode plate 20Y also has a sheet-like outer shape like the positive electrode plate 10X. The negative electrode plate 20Y has a negative electrode current collector 21Y (second electrode current collector) and a negative electrode active material layer 22Y (second electrode active material layer) provided on the negative electrode current collector 21Y. .. The negative electrode active material layer 22Y may have an arbitrary shape, but may have a rectangular outer contour as shown in the figure. In the lithium ion secondary battery, the negative electrode plate 20Y emits lithium ions at the time of discharging and occludes the lithium ions at the time of charging.
負極集電体２１Ｙは、互いに反対側に位置する第１面２１ａおよび第２面２１ｂを主面として有している。負極活物質層２２Ｙは、負極集電体２１Ｙの第１面２１ａおよび第２面２１ｂの少なくとも一方の面上に形成される。本実施の形態においては、各負極板２０Ｙの負極集電体２１Ｙの両側に、負極活物質層２２Ｙがそれぞれ設けられており、各負極板２０Ｙは、互いに同一に構成され得る。なお、最も第１基材４１の側に配置された負極板２０Ｙの負極集電体２１Ｙの第１面２１ａには、負極活物質層２２Ｙは設けられていなくてもよい。また、最も第２基材４２の側に配置された負極板２０Ｙの負極集電体２１Ｙの第２面２１ｂにも、負極活物質層２２Ｙは設けられていなくてもよい。
The negative electrode current collector 21Y has a first surface 21a and a second surface 21b located on opposite sides of each other as main surfaces. The negative electrode active material layer 22Y is formed on at least one of the first surface 21a and the second surface 21b of the negative electrode current collector 21Y. In the present embodiment, the negative electrode active material layers 22Y are provided on both sides of the negative electrode current collector 21Y of each negative electrode plate 20Y, and the negative electrode plates 20Y can be configured to be the same as each other. The negative electrode active material layer 22Y may not be provided on the first surface 21a of the negative electrode current collector 21Y of the negative electrode plate 20Y arranged closest to the first base material 41. Further, the negative electrode active material layer 22Y may not be provided on the second surface 21b of the negative electrode current collector 21Y of the negative electrode plate 20Y arranged closest to the second base material 42.
負極集電体２１Ｙおよび負極活物質層２２Ｙは、積層型電池１（リチウムイオン二次電池）に適用され得る種々の材料を用いて種々の製法により、作製され得る。一例として、負極集電体２１Ｙは、例えば銅箔によって形成される。負極活物質層２２Ｙは、例えば、負極活物質、導電助剤、バインダーとなる結着剤、および増粘剤を含んでいてもよい。負極活物質層２２Ｙは、負極活物質、導電助剤、結着剤および増粘剤を溶媒に分散させてなる負極用スラリーを、負極集電体２１Ｙをなす材料上に塗工し、続いて乾燥し、その後プレスして高密度化することで、作製され得る。負極活物質としては、例えば、金属リチウム、リチウム合金、リチウムイオンを吸蔵および放出し得る炭素系材料（炭素粉末、黒鉛粉末等）、金属酸化物等が挙げられる。導電助剤としては、例えば、アセチレンブラック、カーボンナノチューブ等が挙げられる。結着材としては、例えば、ポリフッ化ビニリデン等のフッ素樹脂、スチレンブタジエンゴム等が挙げられる。増粘剤としては、例えば、カルボキシメチルセルロース等が挙げられる。
The negative electrode current collector 21Y and the negative electrode active material layer 22Y can be produced by various manufacturing methods using various materials that can be applied to the laminated battery 1 (lithium ion secondary battery). As an example, the negative electrode current collector 21Y is formed of, for example, a copper foil. The negative electrode active material layer 22Y may contain, for example, a negative electrode active material, a conductive auxiliary agent, a binder serving as a binder, and a thickener. In the negative electrode active material layer 22Y, a slurry for a negative electrode formed by dispersing a negative electrode active material, a conductive auxiliary agent, a binder and a thickener in a solvent is applied onto a material forming the negative electrode current collector 21Y, followed by coating. It can be made by drying and then pressing to densify. Examples of the negative electrode active material include metallic lithium, lithium alloys, carbon-based materials capable of occluding and releasing lithium ions (carbon powder, graphite powder, etc.), metal oxides, and the like. Examples of the conductive auxiliary agent include acetylene black and carbon nanotubes. Examples of the binder include fluororesins such as polyvinylidene fluoride and styrene-butadiene rubber. Examples of the thickener include carboxymethyl cellulose and the like.
図３に示すように、負極集電体２１Ｙは、互いに隣接する負極接続領域ａ２（第２接続領域）および負極有効領域ｂ２（第２有効領域）を有している。負極活物質層２２Ｙは、負極集電体２１Ｙの負極有効領域ｂ２のみに配置されている。負極有効領域ｂ２は、任意の形状を有していてもよい。図示するように、負極有効領域ｂ２は、長方形形状の外輪郭を有していてもよく、全体的に負極活物質層２２Ｙが設けられた領域になっていてもよい。負極接続領域ａ２および負極有効領域ｂ２は、負極板２０Ｙの第１方向ｄ１に配列されている。負極接続領域ａ２は、負極有効領域ｂ２よりも負極板２０Ｙの第１方向ｄ１における外側（図３における左側）に位置している。
As shown in FIG. 3, the negative electrode current collector 21Y has a negative electrode connection region a2 (second connection region) and a negative electrode effective region b2 (second effective region) adjacent to each other. The negative electrode active material layer 22Y is arranged only in the negative electrode effective region b2 of the negative electrode current collector 21Y. The negative electrode effective region b2 may have an arbitrary shape. As shown in the figure, the negative electrode effective region b2 may have a rectangular outer contour, or may be a region provided with the negative electrode active material layer 22Y as a whole. The negative electrode connection region a2 and the negative electrode effective region b2 are arranged in the first direction d1 of the negative electrode plate 20Y. The negative electrode connection region a2 is located outside the negative electrode plate 20Y in the first direction d1 (left side in FIG. 3) with respect to the negative electrode effective region b2.
各々の負極集電体２１Ｙの負極接続領域ａ２によって、負極接続部２３（第２接続部）が構成されている。負極接続部２３は、第１基材４１の側の面である第１面２３ａと、第２基材４２の側の面である第２面２３ｂと、を有している。第１面２３ａは、複数の負極集電体２１Ｙのうち最も第１基材４１の側に配置された負極集電体２１Ｙの負極接続領域ａ２における第１面２１ａに相当する。また、第２面２３ｂは、複数の負極集電体２１Ｙのうち最も第２基材４２の側に配置された負極集電体２１Ｙの負極接続領域ａ２における第２面２１ｂに相当する。本実施の形態においては、第２面２３ｂに、負極タブ２６（第２タブ）が接合されている（図６参照）。負極タブ２６は、抵抗溶接や超音波溶接、テープによる貼着、溶着等によって第２面２３ｂに接合されている。また、各々の負極集電体２１Ｙも、負極タブ２６が第２面２３ｂに接合された位置において、互いに接合されている。これにより、各々の負極集電体２１Ｙと負極タブ２６とが電気的に接続されている。
The negative electrode connection portion 23 (second connection portion) is configured by the negative electrode connection region a2 of each negative electrode current collector 21Y. The negative electrode connecting portion 23 has a first surface 23a, which is a side surface of the first base material 41, and a second surface 23b, which is a side surface of the second base material 42. The first surface 23a corresponds to the first surface 21a in the negative electrode connection region a2 of the negative electrode current collector 21Y arranged closest to the first base material 41 among the plurality of negative electrode current collectors 21Y. Further, the second surface 23b corresponds to the second surface 21b in the negative electrode connection region a2 of the negative electrode current collector 21Y arranged closest to the second base material 42 among the plurality of negative electrode current collectors 21Y. In the present embodiment, the negative electrode tab 26 (second tab) is joined to the second surface 23b (see FIG. 6). The negative electrode tab 26 is bonded to the second surface 23b by resistance welding, ultrasonic welding, tape bonding, welding, or the like. Further, the negative electrode current collectors 21Y are also joined to each other at the position where the negative electrode tab 26 is joined to the second surface 23b. As a result, each negative electrode current collector 21Y and the negative electrode tab 26 are electrically connected.
一方、図３に示すように、負極有効領域ｂ２は、積層方向ｄＬで見たときに、正極板１０Ｘの正極活物質層１２Ｘに対向する領域を内包するように広がっている。すなわち、負極有効領域ｂ２は、積層方向ｄＬで見たときに、全周に亘って、正極活物質層１２Ｘの外側にはみ出すように広がっている。このため、上述したように、第１方向ｄ１における負極板２０Ｙの負極有効領域ｂ２の寸法は、第１方向ｄ１における正極板１０Ｘの正極有効領域ｂ１の寸法よりも大きくなっている。また、第２方向ｄ２における負極板２０Ｙの寸法は、第２方向ｄ２における正極板１０Ｘの寸法よりも大きくなっている。
On the other hand, as shown in FIG. 3, the negative electrode effective region b2 extends so as to include a region of the positive electrode plate 10X facing the positive electrode active material layer 12X when viewed in the stacking direction dL. That is, the negative electrode effective region b2 extends so as to protrude to the outside of the positive electrode active material layer 12X over the entire circumference when viewed in the stacking direction dL. Therefore, as described above, the size of the negative electrode effective region b2 of the negative electrode plate 20Y in the first direction d1 is larger than the size of the positive electrode effective region b1 of the positive electrode plate 10X in the first direction d1. Further, the size of the negative electrode plate 20Y in the second direction d2 is larger than the size of the positive electrode plate 10X in the second direction d2.
本実施の形態においては、負極板２０Ｙは、比較的大きなサイズを有しており、第１方向ｄ１における負極板２０Ｙの寸法は、１８０ｍｍ以上であってもよい。第１方向ｄ１における負極板２０Ｙの負極有効領域ｂ２の寸法は、１５０ｍｍ以上であってもよい。また、第２方向ｄ２における負極板２０Ｙの寸法は、８０ｍｍ以上であってもよい。
In the present embodiment, the negative electrode plate 20Y has a relatively large size, and the size of the negative electrode plate 20Y in the first direction d1 may be 180 mm or more. The size of the negative electrode effective region b2 of the negative electrode plate 20Y in the first direction d1 may be 150 mm or more. Further, the size of the negative electrode plate 20Y in the second direction d2 may be 80 mm or more.
図４に示すように、正極板１０Ｘおよび負極板２０Ｙの間に絶縁シート３１が配置されていてもよい。絶縁シート３１は、正極板１０Ｘと負極板２０Ｙとの間に介在されて、セパレータとして機能する。図４に示す例では、絶縁シート３１は、正極板１０Ｘの後述する機能層３０Ａと負極板２０Ｙの負極活物質層２２Ｙとの間に配置されている。このような絶縁シート３１は、例えば、不織布や多孔質材から形成され得る。この例において、外装体４０内に収容された電解液またはゲル状電解液が、絶縁シート３１に含浸して保持される。この例に用いられる絶縁シート３１は、特に限定されることはなく、積層型電池１、とりわけリチウムイオン二次電池に適用され得る種々の絶縁体を用いることができる。
As shown in FIG. 4, the insulating sheet 31 may be arranged between the positive electrode plate 10X and the negative electrode plate 20Y. The insulating sheet 31 is interposed between the positive electrode plate 10X and the negative electrode plate 20Y and functions as a separator. In the example shown in FIG. 4, the insulating sheet 31 is arranged between the functional layer 30A of the positive electrode plate 10X, which will be described later, and the negative electrode active material layer 22Y of the negative electrode plate 20Y. Such an insulating sheet 31 can be formed of, for example, a non-woven fabric or a porous material. In this example, the electrolytic solution or the gel-like electrolytic solution contained in the exterior body 40 is impregnated into the insulating sheet 31 and held. The insulating sheet 31 used in this example is not particularly limited, and various insulators applicable to the laminated battery 1, particularly the lithium ion secondary battery, can be used.
また、図４に示すように、正極板１０Ｘおよび負極板２０Ｙの少なくとも一方が、他方に対向する面に機能層３０Ａを有していてもよい。機能層３０Ａは、絶縁性を有し、正極板１０Ｘおよび負極板２０Ｙが短絡することを防止する。図示された例においては、正極板１０Ｘが機能層３０Ａを有している。機能層３０Ａは、正極活物質層１２Ｘの絶縁シート３１の側の面（絶縁シート３１に対向する面）に設けられている。すなわち、各正極活物質層１２Ｘの対向する絶縁シート３１の側の面に機能層３０Ａが設けられている。各正極活物質層１２Ｘの当該面は、機能層３０Ａにより覆われている。そして、正極板１０Ｘのうち絶縁シート３１と積層方向ｄＬに対向する面が、機能層３０Ａによって形成されている。なお、図４に示す機能層３０Ａの代わりに、あるいは加えて、負極板２０Ｙが、各負極活物質層２２Ｙを覆う機能層３０Ａを有することも可能である。
Further, as shown in FIG. 4, at least one of the positive electrode plate 10X and the negative electrode plate 20Y may have the functional layer 30A on the surface facing the other. The functional layer 30A has an insulating property and prevents the positive electrode plate 10X and the negative electrode plate 20Y from being short-circuited. In the illustrated example, the positive electrode plate 10X has a functional layer 30A. The functional layer 30A is provided on the surface of the positive electrode active material layer 12X on the side of the insulating sheet 31 (the surface facing the insulating sheet 31). That is, the functional layer 30A is provided on the surface of each positive electrode active material layer 12X on the opposite side of the insulating sheet 31. The surface of each positive electrode active material layer 12X is covered with the functional layer 30A. The surface of the positive electrode plate 10X facing the insulating sheet 31 in the stacking direction dL is formed by the functional layer 30A. In addition to or in addition to the functional layer 30A shown in FIG. 4, the negative electrode plate 20Y may have a functional layer 30A covering each negative electrode active material layer 22Y.
機能層３０Ａは、負極活物質層２２Ｙよりも高い空孔率を有していてもよい。また、機能層３０Ａは、優れた耐熱性を有していてもよい。このような機能層３０Ａの材料には、無機材料を用いてもよい。無機材料は、高い空孔率とともに優れた耐熱性、例えば１５０℃以上の耐熱性を機能層３０Ａに付与することができる。無機材料としては、二酸化ケイ素、窒化ケイ素、アルミナ、ベーマイト、チタニア、ジルコニア、窒化ホウ素、酸化亜鉛、二酸化スズ、酸化ニオブ（Ｎｂ２Ｏ５）、酸化タンタル（Ｔａ２Ｏ５）、フッ化カリウム、フッ化リチウム、クレイ、ゼオライト、炭酸カルシウム、ニオブ－タンタル複合酸化物及びマグネシウム－タンタル複合酸化物等が挙げられる。また、機能層３０Ａの材料には、有機材料を用いてもよい。有機材料としては、セルロースおよびその変成体、ポリオレフィン、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリプロピレン、ポリエステル、ポリアクリロニトリル、アラミド、ポリアミドイミド、ポリイミド等の繊維状物や粒子状物が挙げられる。機能層３０Ａは、アルミナで形成する場合には、正極活物質層１２Ｘ上に塗工して固化させることで、作製され得る。
The functional layer 30A may have a higher porosity than the negative electrode active material layer 22Y. Further, the functional layer 30A may have excellent heat resistance. An inorganic material may be used as the material of such a functional layer 30A. The inorganic material can impart excellent heat resistance, for example, heat resistance of 150 ° C. or higher to the functional layer 30A together with a high porosity. Inorganic materials include silicon dioxide, silicon nitride, alumina, boehmite, titania, zirconia, boron nitride, zinc oxide, tin dioxide, niobium oxide (Nb 2 O 5 ), tantalum oxide (Ta 2 O 5 ), potassium fluoride, Examples thereof include lithium fluoride, clay, zeolite, calcium carbonate, niob-tantalum composite oxide and magnesium-tantalum composite oxide. Further, an organic material may be used as the material of the functional layer 30A. Examples of the organic material include fibrous substances and particulate substances such as cellulose and its variants, polyolefins, polyethylene terephthalates, polybutylene terephthalates, polypropylenes, polyesters, polyacrylonitriles, aramids, polyamideimides, and polyimides. When the functional layer 30A is formed of alumina, it can be produced by coating it on the positive electrode active material layer 12X and solidifying it.
（タブ）
図１～図３に示すように、第１方向ｄ１において膜電極接合体５の一側（図３における右側）に正極タブ１６が接続されている。また、第１方向ｄ１において膜電極接合体５の他側（図３における左側）に負極タブ２６が接続されている。本実施の形態においては、上述したように、正極タブ１６は、膜電極接合体５の正極接続部１３の第２面１３ｂに接続されている。また、負極タブ２６は、膜電極接合体５の負極接続部２３の第２面２３ｂに接続されている。上述したように、タブ１６，２６はそれぞれ、抵抗溶接や超音波溶接、テープによる貼着、溶着等によって接合されている。これにより、正極タブ１６は、各々の正極集電体１１Ｘと電気的に接続され、負極タブ２６は、各々の負極集電体２１Ｙと電気的に接続されている。 (tab)
As shown in FIGS. 1 to 3, thepositive electrode tab 16 is connected to one side (right side in FIG. 3) of the membrane electrode assembly 5 in the first direction d1. Further, the negative electrode tab 26 is connected to the other side (left side in FIG. 3) of the membrane electrode assembly 5 in the first direction d1. In the present embodiment, as described above, the positive electrode tab 16 is connected to the second surface 13b of the positive electrode connection portion 13 of the membrane electrode assembly 5. Further, the negative electrode tab 26 is connected to the second surface 23b of the negative electrode connection portion 23 of the membrane electrode assembly 5. As described above, the tabs 16 and 26 are bonded by resistance welding, ultrasonic welding, tape bonding, welding, or the like, respectively. As a result, the positive electrode tab 16 is electrically connected to each positive electrode current collector 11X, and the negative electrode tab 26 is electrically connected to each negative electrode current collector 21Y.
図１～図３に示すように、第１方向ｄ１において膜電極接合体５の一側（図３における右側）に正極タブ１６が接続されている。また、第１方向ｄ１において膜電極接合体５の他側（図３における左側）に負極タブ２６が接続されている。本実施の形態においては、上述したように、正極タブ１６は、膜電極接合体５の正極接続部１３の第２面１３ｂに接続されている。また、負極タブ２６は、膜電極接合体５の負極接続部２３の第２面２３ｂに接続されている。上述したように、タブ１６，２６はそれぞれ、抵抗溶接や超音波溶接、テープによる貼着、溶着等によって接合されている。これにより、正極タブ１６は、各々の正極集電体１１Ｘと電気的に接続され、負極タブ２６は、各々の負極集電体２１Ｙと電気的に接続されている。 (tab)
As shown in FIGS. 1 to 3, the
正極タブ１６は、第１方向ｄ１において、外装体４０の外部に延び出ており、積層型電池１の正極端子として機能する。正極タブ１６には、正極シーラント１８が設けられている。同様に、負極タブ２６は、第１方向ｄ１において、外装体４０の外部に延び出ており、積層型電池１の負極端子として機能する。負極タブ２６には、負極シーラント２８が設けられている。
The positive electrode tab 16 extends to the outside of the exterior body 40 in the first direction d1 and functions as a positive electrode terminal of the laminated battery 1. The positive electrode tab 16 is provided with a positive electrode sealant 18. Similarly, the negative electrode tab 26 extends to the outside of the exterior body 40 in the first direction d1 and functions as a negative electrode terminal of the laminated battery 1. The negative electrode tab 26 is provided with a negative electrode sealant 28.
正極タブ１６は、アルミニウム等を用いて形成され得る。負極タブ２６は、ニッケル、ニッケルメッキ銅等を用いて形成され得る。シーラント１８，２８は、外装体４０の樹脂接着層４０ｂとタブ１６，２６とに溶着可能な材料から構成される。シーラント１８，２８の材料としては、ポリプロピレン、変性ポリプロピレン、低密度ポリプロピレン、アイオノマー、エチレン・酢酸ビニル等を挙げることができる。
The positive electrode tab 16 can be formed by using aluminum or the like. The negative electrode tab 26 can be formed using nickel, nickel-plated copper, or the like. The sealants 18 and 28 are made of a material that can be welded to the resin adhesive layer 40b of the exterior body 40 and the tabs 16 and 26. Examples of the materials of the sealants 18 and 28 include polypropylene, modified polypropylene, low-density polypropylene, ionomer, ethylene-vinyl acetate and the like.
（外装体）
外装体４０は、膜電極接合体５を封止するための包装材である。図５および図６に示すように、外装体４０は、第１基材４１（上側外装体）と、第１基材４１に対向する第２基材４２（下側外装体）と、を有している。本実施の形態においては、第１基材４１と第２基材４２は、別体として構成されている。 (Exterior body)
Theexterior body 40 is a packaging material for sealing the membrane electrode assembly 5. As shown in FIGS. 5 and 6, the exterior body 40 has a first base material 41 (upper outer body) and a second base material 42 (lower outer body) facing the first base material 41. are doing. In the present embodiment, the first base material 41 and the second base material 42 are configured as separate bodies.
外装体４０は、膜電極接合体５を封止するための包装材である。図５および図６に示すように、外装体４０は、第１基材４１（上側外装体）と、第１基材４１に対向する第２基材４２（下側外装体）と、を有している。本実施の形態においては、第１基材４１と第２基材４２は、別体として構成されている。 (Exterior body)
The
第２基材４２は、シート状に形成されている。一方、第１基材４１は、凸状に形成されている。より具体的には、第１基材４１は、周辺部４３と、膨出部４４と、を有している。周辺部４３は、第１方向ｄ１において正極タブ１６の側の外端縁４１ａ（図５における右側）から内側に延びる正極タブ側部４３ａ（第１タブ側部）と、第１方向ｄ１において負極タブ２６の側の外端縁４１ｂ（図５における左側）から内側に延びる負極タブ側部４３ｂ（第２タブ側部）と、を含んでいる。また、周辺部４３は、第２方向ｄ２における一側の外端縁４１ｃ（図５における下側）から内側に延びる第１側部４３ｃと、第２方向ｄ２における他側の外端縁４１ｄ（図５における上側）から内側に延びる第２側部４３ｄと、を含んでいる。図６に示すように、膨出部４４は、正極タブ側部４３ａに対して第２基材４２の側とは反対側（第１基材４１の後述する金属層４０ａの側）に膨出している。また、膨出部４４は、第１方向ｄ１において正極タブ側部４３ａの内端４３ｅから負極タブ側部４３ｂの内端４３ｆにわたって形成されている。また、膨出部４４は、第２方向ｄ２において第１側部４３ｃの内端４３ｇから第２側部４３ｄの内端４３ｈにわたって形成されている。この膨出部４４により、第１基材４１と第２基材４２との間に、封止空間４５が画定されている。この封止空間４５に、膜電極接合体５が収容されている。膨出部４４は、膜電極接合体５の正極有効領域ｂ１および負極有効領域ｂ２が重なり合った部分に対向している。一方、正極タブ側部４３ａは、膜電極接合体５の正極接続部１３、すなわち正極板１０Ｘの正極接続領域ａ１に対向している。また、負極タブ側部４３ｂは、膜電極接合体５の負極接続部２３、すなわち負極板２０Ｙの負極接続領域ａ２に対向している。膨出部４４は、例えば、シート状の第１基材４１のうち所望の領域を押圧すること（絞り加工）により形成される。この場合、周辺部４３と膨出部４４は一体的に形成される。
The second base material 42 is formed in a sheet shape. On the other hand, the first base material 41 is formed in a convex shape. More specifically, the first base material 41 has a peripheral portion 43 and a bulging portion 44. The peripheral portion 43 includes a positive electrode tab side portion 43a (first tab side portion) extending inward from the outer edge 41a (right side in FIG. 5) on the positive electrode tab 16 side in the first direction d1, and a negative electrode in the first direction d1. It includes a negative electrode tab side portion 43b (second tab side portion) extending inward from the outer edge 41b (left side in FIG. 5) on the tab 26 side. Further, the peripheral portion 43 includes a first side portion 43c extending inward from the outer edge 41c on one side in the second direction d2 (lower side in FIG. 5) and an outer edge 41d on the other side in the second direction d2. A second side portion 43d extending inward from the upper side in FIG. 5) is included. As shown in FIG. 6, the bulging portion 44 bulges to the side opposite to the side of the second base material 42 (the side of the metal layer 40a described later of the first base material 41) with respect to the positive electrode tab side portion 43a. ing. Further, the bulging portion 44 is formed from the inner end 43e of the positive electrode tab side portion 43a to the inner end 43f of the negative electrode tab side portion 43b in the first direction d1. Further, the bulging portion 44 is formed from the inner end 43g of the first side portion 43c to the inner end 43h of the second side portion 43d in the second direction d2. The bulging portion 44 defines a sealing space 45 between the first base material 41 and the second base material 42. The membrane electrode assembly 5 is housed in the sealing space 45. The bulging portion 44 faces the portion where the positive electrode effective region b1 and the negative electrode effective region b2 of the membrane electrode assembly 5 overlap. On the other hand, the positive electrode tab side portion 43a faces the positive electrode connecting portion 13 of the membrane electrode assembly 5, that is, the positive electrode connecting region a1 of the positive electrode plate 10X. Further, the negative electrode tab side portion 43b faces the negative electrode connection portion 23 of the membrane electrode assembly 5, that is, the negative electrode connection region a2 of the negative electrode plate 20Y. The bulging portion 44 is formed, for example, by pressing a desired region of the sheet-shaped first base material 41 (drawing). In this case, the peripheral portion 43 and the bulging portion 44 are integrally formed.
外装体４０は、フレキシブル性を有していてもよい。外装体４０の第１基材４１および第２基材４２はそれぞれ、金属層４０ａと、金属層４０ａの内面に設けられた樹脂接着層４０ｂと、を有するラミネートフィルムで構成されている。金属層４０ａは、高ガスバリア性と成形加工性を有していてもよい。このような金属層４０ａは、アルミニウム箔やステンレス箔等の金属材料により形成されていてもよい。樹脂接着層４０ｂは、金属層４０ａの内面に位置し、金属層４０ａを接合するためのシール層として機能する。樹脂接着層４０ｂは、接着性に加え、絶縁性、耐薬品性、熱可塑性等を有していてもよい。このような樹脂接着層４０ｂは、ポリプロピレン、変性ポリプロピレン、低密度ポリプロピレン、アイオノマー、エチレン・酢酸ビニル等の樹脂材料により形成されていてもよい。
The exterior body 40 may have flexibility. The first base material 41 and the second base material 42 of the exterior body 40 are each composed of a laminated film having a metal layer 40a and a resin adhesive layer 40b provided on the inner surface of the metal layer 40a. The metal layer 40a may have high gas barrier properties and molding processability. Such a metal layer 40a may be formed of a metal material such as aluminum foil or stainless steel foil. The resin adhesive layer 40b is located on the inner surface of the metal layer 40a and functions as a sealing layer for joining the metal layers 40a. The resin adhesive layer 40b may have insulating property, chemical resistance, thermoplasticity, etc. in addition to adhesiveness. Such a resin adhesive layer 40b may be formed of a resin material such as polypropylene, modified polypropylene, low density polypropylene, ionomer, ethylene / vinyl acetate or the like.
本実施の形態による積層型電池１は、第１基材４１と第２基材４２との間に膜電極接合体５を配置した後、ラミネート加工を行うことによって作製される。すなわち、外装体４０の周縁部において、第１基材４１および第２基材４２の各々の内面に形成された樹脂接着層４０ｂがヒートシール（熱溶着）されて、シール部４６が形成される。このようにして、第１基材４１と第２基材４２とが接合されて、外装体４０の内部を封止した封止空間４５に、膜電極接合体５が収容される。
The laminated battery 1 according to the present embodiment is manufactured by arranging the membrane electrode assembly 5 between the first base material 41 and the second base material 42 and then laminating. That is, on the peripheral edge of the exterior body 40, the resin adhesive layer 40b formed on the inner surfaces of the first base material 41 and the second base material 42 is heat-sealed (heat welded) to form the seal portion 46. .. In this way, the membrane electrode assembly 5 is housed in the sealing space 45 in which the first base material 41 and the second base material 42 are joined and the inside of the exterior body 40 is sealed.
なお、タブ１６，２６はそれぞれ、第１方向ｄ１において外装体４０の内側からシール部４６を通って外装体４０の外側に延び出ている。第１基材４１とタブ１６，２６とは、シーラント１８，２８を介してヒートシールされる。同様に、第２基材４２とタブ１６，２６とは、シーラント１８，２８を介してヒートシールされる。
The tabs 16 and 26 each extend from the inside of the exterior body 40 to the outside of the exterior body 40 through the seal portion 46 in the first direction d1. The first base material 41 and the tabs 16 and 26 are heat-sealed via the sealants 18 and 28. Similarly, the second base material 42 and the tabs 16 and 26 are heat-sealed via the sealants 18 and 28.
本実施の形態においては、外装体４０は、上述したような比較的大きなサイズを有する正極板１０Ｘおよび負極板２０Ｙを収容している。このため、外装体４０も、比較的大きなサイズを有している。第１方向ｄ１における第１基材４１の寸法Ｌは、２００ｍｍ以上であってもよい。また、第２方向ｄ２における第１基材４１の寸法Ｗは、１００ｍｍ以上であってもよい。なお、ここでの寸法Ｌ，Ｗとは、外装体４０の端部での折り返し等がなく外装体４０の周縁部が平坦な状態での平面寸法を意味する。外装体４０の端部が折り返されている場合には、寸法Ｌ，Ｗは、その折り返し部分を戻して外装体４０の周縁部を平坦な状態にしたときの寸法である。第１方向ｄ１における第２基材４２の寸法および第２方向ｄ２における第２基材４２の寸法は、第１基材４１のそれらの寸法と同程度であってもよい。
In the present embodiment, the exterior body 40 accommodates the positive electrode plate 10X and the negative electrode plate 20Y having a relatively large size as described above. Therefore, the exterior body 40 also has a relatively large size. The dimension L of the first base material 41 in the first direction d1 may be 200 mm or more. Further, the dimension W of the first base material 41 in the second direction d2 may be 100 mm or more. The dimensions L and W here mean the plane dimensions in a state where the peripheral edge portion of the exterior body 40 is flat without folding back at the end portion of the exterior body 40. When the end portion of the exterior body 40 is folded back, the dimensions L and W are the dimensions when the folded portion is returned to flatten the peripheral edge portion of the exterior body 40. The dimensions of the second base material 42 in the first direction d1 and the dimensions of the second base material 42 in the second direction d2 may be similar to those of the first base material 41.
また、本実施の形態において、第１方向ｄ１における正極タブ側部４３ａの寸法ｄｘ１は、２０ｍｍ以上であってもよく、１００ｍｍ以下であってもよい。第１方向ｄ１における負極タブ側部４３ｂの寸法ｄｘ２も、２０ｍｍ以上であってもよく、１００ｍｍ以下であってもよい。また、第２方向ｄ２における正極タブ側部４３ａの寸法は、第２方向ｄ２における第１基材４１の寸法Ｗと同じであってもよく、１００ｍｍ以上であってもよい。第２方向ｄ２における負極タブ側部４３ｂの寸法も、第２方向ｄ２における第１基材４１の寸法Ｗと同じであってもよく、１００ｍｍ以上であってもよい。なお、これらの寸法も、上記と同様、外装体４０の端部での折り返し等がなく外装体４０の周縁部が平坦な状態での寸法を意味し、外装体４０の端部が折り返されている場合には、その折り返し部分を戻して外装体４０の周縁部を平坦な状態にしたときの寸法である。
Further, in the present embodiment, the dimension dx1 of the positive electrode tab side portion 43a in the first direction d1 may be 20 mm or more, or 100 mm or less. The dimension dx2 of the negative electrode tab side portion 43b in the first direction d1 may also be 20 mm or more, or 100 mm or less. Further, the dimension of the positive electrode tab side portion 43a in the second direction d2 may be the same as the dimension W of the first base material 41 in the second direction d2, or may be 100 mm or more. The size of the negative electrode tab side portion 43b in the second direction d2 may be the same as the size W of the first base material 41 in the second direction d2, or may be 100 mm or more. Note that these dimensions also mean the dimensions in a state where the peripheral edge portion of the exterior body 40 is flat without folding back at the end portion of the exterior body 40, and the end portion of the exterior body 40 is folded back. If so, it is the dimension when the folded-back portion is returned and the peripheral edge portion of the exterior body 40 is made flat.
上述したように、本実施の形態においては、積層型電池１は、比較的大きなサイズを有する電極板１０Ｘ，２０Ｙおよび外装体４０を備える大型の積層型電池１である。このため、積層型電池１の重量が大きくなっている。本実施の形態においては、積層型電池１の重量は、５００ｇ以上であってもよい。
As described above, in the present embodiment, the laminated battery 1 is a large laminated battery 1 including electrode plates 10X and 20Y having a relatively large size and an exterior body 40. Therefore, the weight of the laminated battery 1 is increased. In the present embodiment, the weight of the laminated battery 1 may be 500 g or more.
このように構成された積層型電池１は、積層方向ｄＬで見たときに、正極タブ側部４３ａと重なる領域として画定される第１被挟持領域Ｓ１と、負極タブ側部４３ｂと重なる領域として画定される第２被挟持領域Ｓ２と、第１被挟持領域Ｓ１と第２被挟持領域Ｓ２との間に設けられた、膨出部４４が位置する膨出部領域ＳＢと、に区画される（図５および図６参照）。第１被挟持領域Ｓ１と第２被挟持領域Ｓ２は、積層型電池１を搬送する際に、後述する挟持装置６０により挟持されるための領域である。
The laminated battery 1 configured in this way has a first sandwiched region S1 defined as a region overlapping the positive electrode tab side portion 43a and a region overlapping the negative electrode tab side portion 43b when viewed in the stacking direction dL. It is divided into a defined second sandwiched area S2 and a bulging portion area SB where the bulging portion 44 is located, which is provided between the first sandwiched area S1 and the second sandwiched area S2. (See FIGS. 5 and 6). The first sandwiched area S1 and the second sandwiched area S2 are areas for being sandwiched by the sandwiching device 60, which will be described later, when the laminated battery 1 is conveyed.
［積層型電池の製造方法］
次に、リチウムイオン二次電池として構成された本実施の形態による積層型電池１の製造方法について説明する。以下に説明する積層型電池の製造方法は、膜電極接合体５を準備する膜電極接合体準備工程と、膜電極接合体５にタブ１６，２６を取り付けるタブ取付工程と、第１基材４１および第２基材４２を準備する外装体準備工程と、膜電極接合体５を第１基材４１と第２基材４２との間に封止する封止工程と、を備える。以下、各工程について説明する。 [Manufacturing method of stacked batteries]
Next, a method of manufacturing thelaminated battery 1 according to the present embodiment, which is configured as a lithium ion secondary battery, will be described. The method for manufacturing the laminated battery described below includes a membrane electrode assembly preparation step for preparing the membrane electrode assembly 5, a tab attachment step for attaching the tabs 16 and 26 to the membrane electrode assembly 5, and a first base material 41. And an exterior body preparation step for preparing the second base material 42, and a sealing step for sealing the membrane electrode assembly 5 between the first base material 41 and the second base material 42. Hereinafter, each step will be described.
次に、リチウムイオン二次電池として構成された本実施の形態による積層型電池１の製造方法について説明する。以下に説明する積層型電池の製造方法は、膜電極接合体５を準備する膜電極接合体準備工程と、膜電極接合体５にタブ１６，２６を取り付けるタブ取付工程と、第１基材４１および第２基材４２を準備する外装体準備工程と、膜電極接合体５を第１基材４１と第２基材４２との間に封止する封止工程と、を備える。以下、各工程について説明する。 [Manufacturing method of stacked batteries]
Next, a method of manufacturing the
（膜電極接合体準備工程）
膜電極接合体準備工程では、膜電極接合体５を準備する。膜電極接合体準備工程は、正極板１０Ｘおよび負極板２０Ｙをそれぞれ作製する工程と、正極板１０Ｘおよび負極板２０Ｙを交互に積層する工程と、を含んでいる。 (Membrane electrode assembly preparation process)
In the membrane electrode assembly preparation step, themembrane electrode assembly 5 is prepared. The membrane electrode assembly preparation step includes a step of producing the positive electrode plate 10X and the negative electrode plate 20Y, respectively, and a step of alternately laminating the positive electrode plate 10X and the negative electrode plate 20Y.
膜電極接合体準備工程では、膜電極接合体５を準備する。膜電極接合体準備工程は、正極板１０Ｘおよび負極板２０Ｙをそれぞれ作製する工程と、正極板１０Ｘおよび負極板２０Ｙを交互に積層する工程と、を含んでいる。 (Membrane electrode assembly preparation process)
In the membrane electrode assembly preparation step, the
まず、正極板１０Ｘおよび負極板２０Ｙをそれぞれ作製する工程を実施する。この工程においては、まず、正極集電体１１Ｘを構成するようになる長尺のアルミニウム箔上に、正極活物質層１２Ｘを構成するようになる組成物（スラリー）を塗工し、続いて乾燥し、その後プレスして高密度化する。次に、所望の大きさに断裁し、枚葉状の正極板１０Ｘが作製され得る。同様に、負極集電体２１Ｙを構成するようになる長尺の銅箔上に、負極活物質層２２Ｙを構成するようになる組成物（スラリー）を塗工し、続いて乾燥し、その後プレスして高密度化する。次に、所望の大きさに断裁し、枚葉状の負極板２０Ｙが作製され得る。なお、正極板１０Ｘおよび負極板２０Ｙの少なくとも一方に機能層３０Ａをアルミナで形成して付与する場合には、例えば、電極板１０Ｘ，２０Ｙをなすようになる断裁前の長尺材上または断裁後の枚葉材上に、アルミナを含む材料を塗布して固化させることで機能層３０Ａを作製することができる。
First, the steps of manufacturing the positive electrode plate 10X and the negative electrode plate 20Y are carried out. In this step, first, a composition (slurry) that constitutes the positive electrode active material layer 12X is applied onto a long aluminum foil that constitutes the positive electrode current collector 11X, and then dried. Then press to increase the density. Next, it can be cut to a desired size to produce a single-wafer-shaped positive electrode plate 10X. Similarly, a composition (slurry) that constitutes the negative electrode active material layer 22Y is applied onto a long copper foil that constitutes the negative electrode current collector 21Y, subsequently dried, and then pressed. To increase the density. Next, it can be cut to a desired size to produce a single-wafer-shaped negative electrode plate 20Y. When the functional layer 30A is formed of alumina on at least one of the positive electrode plate 10X and the negative electrode plate 20Y and applied, for example, on a long material before cutting or after cutting so as to form the electrode plates 10X and 20Y. The functional layer 30A can be produced by applying a material containing alumina on the single-wafer material of No. 1 and solidifying it.
次に、正極板１０Ｘおよび負極板２０Ｙを交互に積層する工程を実施する。この工程においては、正極板１０Ｘの正極活物質層１２Ｘと負極板２０Ｙの負極活物質層２２Ｙとが正対するようにして、正極板１０Ｘと負極板２０Ｙとの間に絶縁シート３１を介在させながら、正極板１０Ｘおよび負極板２０Ｙを積層していく。積層方向ｄＬにおける最下部および最上部には、負極板２０Ｙが配置される。
Next, a step of alternately laminating the positive electrode plate 10X and the negative electrode plate 20Y is carried out. In this step, the positive electrode active material layer 12X of the positive electrode plate 10X and the negative electrode active material layer 22Y of the negative electrode plate 20Y face each other, and the insulating sheet 31 is interposed between the positive electrode plate 10X and the negative electrode plate 20Y. , Positive electrode plate 10X and negative electrode plate 20Y are laminated. The negative electrode plate 20Y is arranged at the lowermost portion and the uppermost portion in the stacking direction dL.
このようにして、正極板１０Ｘおよび負極板２０Ｙが交互に積層された膜電極接合体５を得ることができる。
In this way, the membrane electrode assembly 5 in which the positive electrode plate 10X and the negative electrode plate 20Y are alternately laminated can be obtained.
（タブ取付工程）
膜電極接合体準備工程の後に、タブ取付工程が行われる。タブ取付工程では、第１方向ｄ１において膜電極接合体５の両側に一対のタブ１６，２６を取り付ける。タブ取付工程は、タブ１６，２６を準備する工程と、膜電極接合体５にタブ１６，２６を取り付ける工程と、を含んでいる。 (Tab mounting process)
After the membrane electrode assembly preparation step, a tab attachment step is performed. In the tab attachment step, a pair of tabs 16 and 26 are attached to both sides of the membrane electrode assembly 5 in the first direction d1. The tab attachment step includes a step of preparing the tabs 16 and 26 and a step of attaching the tabs 16 and 26 to the membrane electrode assembly 5.
膜電極接合体準備工程の後に、タブ取付工程が行われる。タブ取付工程では、第１方向ｄ１において膜電極接合体５の両側に一対のタブ１６，２６を取り付ける。タブ取付工程は、タブ１６，２６を準備する工程と、膜電極接合体５にタブ１６，２６を取り付ける工程と、を含んでいる。 (Tab mounting process)
After the membrane electrode assembly preparation step, a tab attachment step is performed. In the tab attachment step, a pair of
まず、タブ１６，２６を準備する工程を実施する。この工程においては、アルミニウム金属で形成された正極タブ１６であって、正極シーラント１８が取り付けられた正極タブ１６を準備する。正極シーラント１８は、第１方向ｄ１において正極タブ１６の一部を覆うように取り付けられ、第２方向ｄ２において正極タブ１６の両側に延び出るように取り付けられる。また、銅金属で形成された負極タブ２６であって、負極シーラント２８が取り付けられた負極タブ２６を準備する。負極シーラント２８は、第１方向ｄ１において負極タブ２６の一部を覆うように取り付けられ、第２方向ｄ２において負極タブ２６の両側に延び出るように取り付けられる。
First, carry out the process of preparing tabs 16 and 26. In this step, a positive electrode tab 16 made of aluminum metal and to which a positive electrode sealant 18 is attached is prepared. The positive electrode sealant 18 is attached so as to cover a part of the positive electrode tab 16 in the first direction d1, and is attached so as to extend to both sides of the positive electrode tab 16 in the second direction d2. Further, a negative electrode tab 26 formed of copper metal and to which a negative electrode sealant 28 is attached is prepared. The negative electrode sealant 28 is attached so as to cover a part of the negative electrode tab 26 in the first direction d1, and is attached so as to extend to both sides of the negative electrode tab 26 in the second direction d2.
次に、膜電極接合体５にタブ１６，２６を取り付ける工程を実施する。この工程においては、準備したタブ１６，２６を、膜電極接合体５の接続部１３，２３にそれぞれ取り付ける。より具体的には、まず、正極タブ１６をステージ上に載置する。続いて、正極タブ１６の上面と膜電極接合体５の正極接続部１３の第２面１３ｂとが部分的に重なるように、膜電極接合体５を載置する。この際、第２方向ｄ２における正極接続領域ａ１の中心位置と正極タブ１６の中心位置とが一致するように、正極タブ１６に対する膜電極接合体５の位置合わせを行う。その後、抵抗溶接や超音波溶接等によって正極タブ１６を膜電極接合体５の正極接続部１３に溶着させる。これにより、正極接続部１３の第２面１３ｂに、正極タブ１６が接合される。この際、各々の正極集電体１１Ｘも、正極タブ１６が第２面１３ｂに接合された位置において、互いに接合される。このようにして、正極タブ１６を、膜電極接合体の正極接続部１３に電気的に接続させることができる。同様にして、準備した負極タブ２６を、膜電極接合体５の負極接続部２３に電気的に接続させることができる。
Next, the steps of attaching the tabs 16 and 26 to the membrane electrode assembly 5 are carried out. In this step, the prepared tabs 16 and 26 are attached to the connecting portions 13 and 23 of the membrane electrode assembly 5, respectively. More specifically, first, the positive electrode tab 16 is placed on the stage. Subsequently, the membrane electrode assembly 5 is placed so that the upper surface of the positive electrode tab 16 and the second surface 13b of the positive electrode connection portion 13 of the membrane electrode assembly 5 partially overlap. At this time, the membrane electrode assembly 5 is aligned with the positive electrode tab 16 so that the center position of the positive electrode connection region a1 in the second direction d2 and the center position of the positive electrode tab 16 coincide with each other. After that, the positive electrode tab 16 is welded to the positive electrode connection portion 13 of the membrane electrode assembly 5 by resistance welding, ultrasonic welding, or the like. As a result, the positive electrode tab 16 is joined to the second surface 13b of the positive electrode connecting portion 13. At this time, the positive electrode current collectors 11X are also joined to each other at the position where the positive electrode tab 16 is joined to the second surface 13b. In this way, the positive electrode tab 16 can be electrically connected to the positive electrode connection portion 13 of the membrane electrode assembly. Similarly, the prepared negative electrode tab 26 can be electrically connected to the negative electrode connection portion 23 of the membrane electrode assembly 5.
このようにして、タブ１６，２６が取り付けられた膜電極接合体５を得ることができる。
In this way, the membrane electrode assembly 5 to which the tabs 16 and 26 are attached can be obtained.
（外装体準備工程）
外装体準備工程では、第１基材４１および第２基材４２を準備する。外装体準備工程は、第１基材４１を作製する工程と、第２基材４２を作製する工程と、を含んでいる。 (Exterior body preparation process)
In the exterior body preparation step, thefirst base material 41 and the second base material 42 are prepared. The exterior body preparation step includes a step of manufacturing the first base material 41 and a step of manufacturing the second base material 42.
外装体準備工程では、第１基材４１および第２基材４２を準備する。外装体準備工程は、第１基材４１を作製する工程と、第２基材４２を作製する工程と、を含んでいる。 (Exterior body preparation process)
In the exterior body preparation step, the
第１基材４１を作製する工程においては、まず、金属層４０ａを構成するアルミニウム箔の一側に、樹脂接着層４０ｂを構成するようになる樹脂材料の組成物を塗工して固化する。次に、所望の大きさに断裁し、平板状の第１基材４１が得られる。その後、平板状の第１基材４１に対して、絞り加工を行い、膨出部４４を形成する。ここで、第１方向ｄ１における正極タブ側部４３ａの寸法ｄｘ１および負極タブ側部４３ｂの寸法ｄｘ２が、所望の値となるように形成される。これにより、所望の寸法を有する正極タブ側部４３ａおよび負極タブ側部４３ｂを有する第１基材４１が作製され得る（図５参照）。
In the step of producing the first base material 41, first, a composition of a resin material that constitutes the resin adhesive layer 40b is applied to one side of the aluminum foil that constitutes the metal layer 40a and solidified. Next, it is cut to a desired size to obtain a flat plate-shaped first base material 41. After that, the flat plate-shaped first base material 41 is drawn to form a bulging portion 44. Here, the dimension dx1 of the positive electrode tab side portion 43a and the dimension dx2 of the negative electrode tab side portion 43b in the first direction d1 are formed so as to have desired values. As a result, the first base material 41 having the positive electrode tab side portion 43a and the negative electrode tab side portion 43b having desired dimensions can be produced (see FIG. 5).
第２基材４２を作製する工程においては、まず、金属層４０ａを構成するアルミニウム箔の一側に、樹脂接着層４０ｂを構成するようになる樹脂材料の組成物を塗工して固化する。次に、所望の大きさに断裁し、平板状の第２基材４２が得られる。
In the step of producing the second base material 42, first, a composition of a resin material that constitutes the resin adhesive layer 40b is applied to one side of the aluminum foil that constitutes the metal layer 40a and solidified. Next, it is cut to a desired size to obtain a flat plate-shaped second base material 42.
このようにして、膜電極接合体５を封止する外装体４０を構成する第１基材４１および第２基材４２を得ることができる。
In this way, the first base material 41 and the second base material 42 constituting the exterior body 40 that seals the membrane electrode assembly 5 can be obtained.
（封止工程）
タブ取付工程および外装体準備工程の後に、封止工程が行われる。封止工程では、外装体４０内に膜電極接合体５を封止する。 (Seal process)
A sealing step is performed after the tab mounting step and the exterior body preparation step. In the sealing step, themembrane electrode assembly 5 is sealed in the exterior body 40.
タブ取付工程および外装体準備工程の後に、封止工程が行われる。封止工程では、外装体４０内に膜電極接合体５を封止する。 (Seal process)
A sealing step is performed after the tab mounting step and the exterior body preparation step. In the sealing step, the
この封止工程においては、まず、樹脂接着層４０ｂが上を向くように、ステージ上に第２基材４２を載置する。続いて、第２基材４２上に膜電極接合体５を載置する。次に、膜電極接合体５の上から、膜電極接合体５が膨出部４４内に収容されるように、第１基材４１を被せる。ここで、第１基材４１の樹脂接着層４０ｂが第２基材４２の樹脂接着層４０ｂに対向するように、第１基材４１を被せる。また、正極タブ側部４３ａが正極板１０Ｘの正極接続領域ａ１に対向し、負極タブ側部４３ｂが負極板２０Ｙの負極接続領域ａ２に対向するように、第１基材４１を被せる。この際、タブ１６，２６が外部に延び出た状態で、膜電極接合体５が第１基材４１と第２基材４２との間に配置される。また、この際、外装体４０とタブ１６，２６との間に、シーラント１８，２８が配置される。
In this sealing step, first, the second base material 42 is placed on the stage so that the resin adhesive layer 40b faces upward. Subsequently, the membrane electrode assembly 5 is placed on the second base material 42. Next, the first base material 41 is covered over the membrane electrode assembly 5 so that the membrane electrode assembly 5 is housed in the bulge 44. Here, the first base material 41 is covered so that the resin adhesive layer 40b of the first base material 41 faces the resin adhesive layer 40b of the second base material 42. Further, the first base material 41 is covered so that the positive electrode tab side portion 43a faces the positive electrode connection region a1 of the positive electrode plate 10X and the negative electrode tab side portion 43b faces the negative electrode connection region a2 of the negative electrode plate 20Y. At this time, the membrane electrode assembly 5 is arranged between the first base material 41 and the second base material 42 with the tabs 16 and 26 extending to the outside. At this time, the sealants 18 and 28 are arranged between the exterior body 40 and the tabs 16 and 26.
その後、膜電極接合体５の周囲において、第１基材４１と第２基材４２とが、例えば１５０℃～２００℃の温度を有する金属製のヒートバーにより押圧される。これにより、ヒートバーにより押圧された領域の近傍において、第１基材４１と第２基材４２の各々の内面に形成された樹脂接着層４０ｂが溶解し、それらが互いにヒートシール（熱溶着）して、シール部４６が形成される。
After that, the first base material 41 and the second base material 42 are pressed by a metal heat bar having a temperature of, for example, 150 ° C. to 200 ° C. around the membrane electrode assembly 5. As a result, the resin adhesive layers 40b formed on the inner surfaces of the first base material 41 and the second base material 42 are melted in the vicinity of the region pressed by the heat bar, and they are heat-sealed (heat welded) with each other. The seal portion 46 is formed.
より具体的には、まず、第２方向ｄ２における外装体４０の一側の縁部（図５における下側）、第１方向ｄ１における外装体４０の一側の縁部（正極タブ１６の側、図５における右側）および第１方向ｄ１における外装体４０の他側の縁部（負極タブ２６の側、図５における左側）が、ヒートバーにより押圧される。これにより、ヒートバーにより押圧された領域の近傍において、第１基材４１と第２基材４２の各々の内面に形成された樹脂接着層４０ｂが溶解し、それらが互いにヒートシール（熱溶着）される。ヒートシールの際、タブ１６，２６の周囲においては、シーラント１８，２８が第１基材４１の樹脂接着層４０ｂおよび第２基材４２の樹脂接着層４０ｂとともに溶解する。このため、第１基材４１とタブ１６，２６とがヒートシールされるとともに、第２基材４２とタブ１６，２６とがヒートシールされる。これにより、タブ１６，２６の周囲に、封止空間４５と外装体４０の外部とを連通するような隙間が形成されることを防止することができる。このようにヒートシールされることにより、第２方向ｄ２における外装体４０の他側の縁部（図５における上側）に開口部が形成される。
More specifically, first, one edge of the exterior body 40 in the second direction d2 (lower side in FIG. 5) and one edge of the exterior body 40 in the first direction d1 (side of the positive electrode tab 16). , The right side in FIG. 5) and the other edge of the exterior body 40 in the first direction d1 (the side of the negative electrode tab 26, the left side in FIG. 5) are pressed by the heat bar. As a result, the resin adhesive layers 40b formed on the inner surfaces of the first base material 41 and the second base material 42 are melted in the vicinity of the region pressed by the heat bar, and they are heat-sealed (heat welded) with each other. To. During heat sealing, the sealants 18 and 28 melt together with the resin adhesive layer 40b of the first base material 41 and the resin adhesive layer 40b of the second base material 42 around the tabs 16 and 26. Therefore, the first base material 41 and the tabs 16 and 26 are heat-sealed, and the second base material 42 and the tabs 16 and 26 are heat-sealed. As a result, it is possible to prevent the formation of a gap around the tabs 16 and 26 so as to communicate the sealing space 45 with the outside of the exterior body 40. By heat-sealing in this way, an opening is formed at the other side edge portion (upper side in FIG. 5) of the exterior body 40 in the second direction d2.
次に、この開口部から外装体４０内に電解液が注入される。これにより、外装体４０内が電解液で充填される。
Next, the electrolytic solution is injected into the exterior body 40 from this opening. As a result, the inside of the exterior body 40 is filled with the electrolytic solution.
その後、第２方向ｄ２において外装体４０の他側の縁部（図５における上側）が、ヒートバーにより押圧される。これにより、外装体４０の第２方向ｄ２における他側の縁部がヒートシールされ、開口部が塞がれる。このため、図５に示すように、膜電極接合体５の周囲で全周にわたってシール部４６が連続状に形成され、枠状のシール部４６によって封止空間４５内の膜電極接合体５が電解液とともに外装体４０内に封止される。なお、このヒートシールは、図示しない減圧チャンバ内で行われ、封止空間４５が減圧されながら封止される。
After that, in the second direction d2, the other edge portion (upper side in FIG. 5) of the exterior body 40 is pressed by the heat bar. As a result, the other side edge portion of the exterior body 40 in the second direction d2 is heat-sealed, and the opening portion is closed. Therefore, as shown in FIG. 5, the sealing portion 46 is continuously formed around the entire circumference of the membrane electrode assembly 5, and the frame-shaped sealing portion 46 allows the membrane electrode assembly 5 in the sealing space 45 to be formed. It is sealed in the exterior body 40 together with the electrolytic solution. This heat seal is performed in a pressure reducing chamber (not shown), and the sealing space 45 is sealed while being reduced in pressure.
このようにして、外装体４０内に膜電極接合体５が封止された積層型電池１を得ることができる。
In this way, the laminated battery 1 in which the membrane electrode assembly 5 is sealed in the exterior body 40 can be obtained.
［積層型電池の搬送方法］
次に、図７～図１０を参照して、本実施の形態による積層型電池１の搬送方法について説明する。以下に説明する積層型電池の搬送方法は、積層型電池１を準備する積層型電池準備工程（準備工程）と、積層型電池１を起立させる起立工程と、挟持装置６０により積層型電池１の被挟持領域Ｓ１，Ｓ２を挟持する挟持工程と、挟持装置６０により被挟持領域Ｓ１，Ｓ２を挟持しながら積層型電池１を吊り下げて搬送する搬送工程と、を備える。以下、各工程について説明する。 [Transportation method for stacked batteries]
Next, a method of transporting thelaminated battery 1 according to the present embodiment will be described with reference to FIGS. 7 to 10. The method for transporting the laminated battery described below includes a laminated battery preparation step (preparation step) for preparing the laminated battery 1, an upright step for raising the laminated battery 1, and a holding device 60 for the laminated battery 1. It includes a sandwiching step of sandwiching the sandwiched areas S1 and S2, and a transporting step of suspending and transporting the laminated battery 1 while sandwiching the sandwiched areas S1 and S2 by the sandwiching device 60. Hereinafter, each step will be described.
次に、図７～図１０を参照して、本実施の形態による積層型電池１の搬送方法について説明する。以下に説明する積層型電池の搬送方法は、積層型電池１を準備する積層型電池準備工程（準備工程）と、積層型電池１を起立させる起立工程と、挟持装置６０により積層型電池１の被挟持領域Ｓ１，Ｓ２を挟持する挟持工程と、挟持装置６０により被挟持領域Ｓ１，Ｓ２を挟持しながら積層型電池１を吊り下げて搬送する搬送工程と、を備える。以下、各工程について説明する。 [Transportation method for stacked batteries]
Next, a method of transporting the
（積層型電池準備工程）
積層型電池準備工程では、積層型電池１を準備する。 (Stacked battery preparation process)
In the laminated battery preparation step, thelaminated battery 1 is prepared.
積層型電池準備工程では、積層型電池１を準備する。 (Stacked battery preparation process)
In the laminated battery preparation step, the
この工程においては、上述した積層型電池の製造方法により、積層型電池１を得ることができる。得られた積層型電池１は、積層型電池１の積層方向ｄＬがステージ５０の載置面５１に直交するように、ステージ５０の載置面５１上に載置される。載置面５１には、積層型電池１の第２基材４２の下面（外面）が対向している。
In this step, the laminated battery 1 can be obtained by the method for manufacturing the laminated battery described above. The obtained laminated battery 1 is mounted on the mounting surface 51 of the stage 50 so that the stacking direction dL of the laminated battery 1 is orthogonal to the mounting surface 51 of the stage 50. The lower surface (outer surface) of the second base material 42 of the laminated battery 1 faces the mounting surface 51.
（起立工程）
積層型電池準備工程の後に、起立工程が行われる。起立工程では、積層型電池１を起立させて起立状態にする。 (Standing process)
After the laminated battery preparation step, an upright step is performed. In the standing step, thelaminated battery 1 is raised to be in the standing state.
積層型電池準備工程の後に、起立工程が行われる。起立工程では、積層型電池１を起立させて起立状態にする。 (Standing process)
After the laminated battery preparation step, an upright step is performed. In the standing step, the
この工程においては、図７に示すように、例えば積層型電池１の積層方向ｄＬがステージ５０の載置面５１と平行になり、積層型電池１の第２基材４２の外面が、載置面５１に垂直になる。例えば、図示しない起立装置により、第１方向ｄ１で見たときに、積層型電池１が第２方向ｄ２における一側が上方に位置するような姿勢となるように、当該一側で積層型電池１の第２基材４２の下面を押し上げるようにしてもよい。このことにより、図７に示すように、積層型電池１をステージ５０上に起立させることができる。
In this step, as shown in FIG. 7, for example, the stacking direction dL of the laminated battery 1 is parallel to the mounting surface 51 of the stage 50, and the outer surface of the second base material 42 of the laminated battery 1 is mounted. It becomes perpendicular to the surface 51. For example, with an upright device (not shown), the laminated battery 1 is arranged so that one side in the second direction d2 is positioned upward when viewed in the first direction d1. The lower surface of the second base material 42 may be pushed up. As a result, as shown in FIG. 7, the laminated battery 1 can be erected on the stage 50.
（挟持工程）
起立工程の後に、挟持工程が行われる。挟持工程では、挟持装置６０により積層型電池１の被挟持領域Ｓ１，Ｓ２を挟持する。挟持工程は、第１被挟持領域Ｓ１を挟持する工程と、第２被挟持領域Ｓ２を挟持する工程と、を含んでいる。以下、第１被挟持領域Ｓ１を挟持するための第１挟持部６１と、第２被挟持領域Ｓ２を挟持するための第２挟持部６２と、を有する挟持装置６０により第１被挟持領域Ｓ１および第２被挟持領域Ｓ２を挟持する例について説明する。 (Pinching process)
After the standing process, a pinching process is performed. In the sandwiching step, the sandwichingdevice 60 sandwiches the sandwiched areas S1 and S2 of the laminated battery 1. The sandwiching step includes a step of sandwiching the first sandwiched area S1 and a step of sandwiching the second sandwiched area S2. Hereinafter, the first sandwiched area S1 is provided by the sandwiching device 60 having the first sandwiching portion 61 for sandwiching the first sandwiched area S1 and the second sandwiching portion 62 for sandwiching the second sandwiched area S2. An example of sandwiching the second sandwiched area S2 will be described.
起立工程の後に、挟持工程が行われる。挟持工程では、挟持装置６０により積層型電池１の被挟持領域Ｓ１，Ｓ２を挟持する。挟持工程は、第１被挟持領域Ｓ１を挟持する工程と、第２被挟持領域Ｓ２を挟持する工程と、を含んでいる。以下、第１被挟持領域Ｓ１を挟持するための第１挟持部６１と、第２被挟持領域Ｓ２を挟持するための第２挟持部６２と、を有する挟持装置６０により第１被挟持領域Ｓ１および第２被挟持領域Ｓ２を挟持する例について説明する。 (Pinching process)
After the standing process, a pinching process is performed. In the sandwiching step, the sandwiching
なお、この例において、第１挟持部６１の第１方向ｄ１における寸法ｄｍ１は、５ｍｍ以上２０ｍｍ以下であってもよい。第１挟持部６１の第１方向ｄ１における寸法ｄｍ１をこのような数値範囲内にすることにより、積層型電池１の重量が５００ｇ以上である場合に、積層型電池１を落下させないように挟持しつつ、積層型電池１に圧痕が残らないような圧力で積層型電池１の第１被挟持領域Ｓ１を挟持することができる。本実施の形態においては、第１挟持部６１の第１方向ｄ１における寸法ｄｍ１は、２０ｍｍである。また、第１挟持部６１の第２方向ｄ２における寸法ｄｎ１は、例えば１００ｍｍである（図８参照）。同様に、第２挟持部６２の第１方向ｄ１における寸法ｄｍ２は、５ｍｍ以上２０ｍｍ以下であってもよい。第２挟持部６２の第１方向ｄ１における寸法ｄｍ２をこのような数値範囲内にすることにより、積層型電池１の重量が５００ｇ以上である場合に、積層型電池１を落下させないように挟持しつつ、積層型電池１に圧痕が残らないような圧力で積層型電池１の第２被挟持領域Ｓ２を挟持することができる。本実施の形態においては、第２挟持部６２の第１方向ｄ１における寸法ｄｍ２は、２０ｍｍである。また、第２挟持部６２の第２方向ｄ２における寸法ｄｎ２は、例えば１００ｍｍである（図８参照）。なお、積層型電池１の落下や積層型電池１に圧痕が残ることを防止するために、挟持部６１，６２の積層型電池１との接触部をゴムで覆ってもよい。
In this example, the dimension dm1 of the first sandwiching portion 61 in the first direction d1 may be 5 mm or more and 20 mm or less. By setting the dimension dm1 of the first sandwiching portion 61 in the first direction d1 within such a numerical range, when the weight of the laminated battery 1 is 500 g or more, the laminated battery 1 is sandwiched so as not to drop. At the same time, the first sandwiched area S1 of the laminated battery 1 can be sandwiched at a pressure that does not leave an indentation on the laminated battery 1. In the present embodiment, the dimension dm1 of the first sandwiching portion 61 in the first direction d1 is 20 mm. Further, the dimension dn1 of the first holding portion 61 in the second direction d2 is, for example, 100 mm (see FIG. 8). Similarly, the dimension dm2 of the second sandwiching portion 62 in the first direction d1 may be 5 mm or more and 20 mm or less. By setting the dimension dm2 of the second sandwiching portion 62 in the first direction d1 within such a numerical range, when the weight of the laminated battery 1 is 500 g or more, the laminated battery 1 is sandwiched so as not to drop. At the same time, the second sandwiched region S2 of the laminated battery 1 can be sandwiched at a pressure that does not leave an indentation on the laminated battery 1. In the present embodiment, the dimension dm2 of the second sandwiching portion 62 in the first direction d1 is 20 mm. Further, the dimension dn2 of the second holding portion 62 in the second direction d2 is, for example, 100 mm (see FIG. 8). In order to prevent the laminated battery 1 from falling or leaving indentations on the laminated battery 1, the contact portions of the sandwiching portions 61 and 62 with the laminated battery 1 may be covered with rubber.
第１被挟持領域Ｓ１を挟持する工程においては、まず、挟持装置６０の一対の第１挟持部６１を、積層型電池１の第１被挟持領域Ｓ１を挟持することができる位置まで移動させる。より具体的には、一方の第１挟持部６１を正極タブ側部４３ａの一側で正極タブ側部４３ａに対向する位置に位置付けるとともに、他方の第１挟持部６１を正極タブ側部４３ａの他側で正極タブ側部４３ａに対向する位置に位置付ける（図９参照）。続いて、この一対の第１挟持部６１により、第１被挟持領域Ｓ１を所定の押圧力で挟持する。この際、第１挟持部６１は、第１基材４１および第２基材４２を介して正極板１０Ｘの正極接続部１３を挟持する。ここで、第１方向ｄ１における第１挟持部６１の寸法ｄｍ１は、上述した第１方向ｄ１における正極タブ側部４３ａの寸法ｄｘ１以下の寸法になっている。このため、第１挟持部６１に第１被挟持領域Ｓ１を挟持させることができる。
In the step of sandwiching the first sandwiched area S1, first, the pair of first sandwiched portions 61 of the sandwiching device 60 are moved to a position where the first sandwiched area S1 of the laminated battery 1 can be sandwiched. More specifically, one of the first sandwiching portions 61 is positioned on one side of the positive electrode tab side portion 43a so as to face the positive electrode tab side portion 43a, and the other first sandwiching portion 61 is positioned on the positive electrode tab side portion 43a. It is positioned on the other side so as to face the positive electrode tab side portion 43a (see FIG. 9). Subsequently, the pair of first sandwiching portions 61 sandwiches the first sandwiched area S1 with a predetermined pressing force. At this time, the first sandwiching portion 61 sandwiches the positive electrode connecting portion 13 of the positive electrode plate 10X via the first base material 41 and the second base material 42. Here, the dimension dm1 of the first sandwiching portion 61 in the first direction d1 is equal to or less than the dimension dx1 of the positive electrode tab side portion 43a in the first direction d1 described above. Therefore, the first sandwiched area S1 can be sandwiched by the first sandwiched portion 61.
一方、第２被挟持領域Ｓ２を挟持する工程においては、まず、挟持装置６０の一対の第２挟持部６２を、積層型電池１の第２被挟持領域Ｓ２を挟持することができる位置まで移動させる。より具体的には、一方の第２挟持部６２を負極タブ側部４３ｂの一側で負極タブ側部４３ｂに対向する位置に位置付けるとともに、他方の第２挟持部６２を負極タブ側部４３ｂの他側で負極タブ側部４３ｂに対向する位置に位置付ける（図９参照）。続いて、この一対の第２挟持部６２により、第２被挟持領域Ｓ２を所定の押圧力で挟持する。この際、第２挟持部６２は、第１基材４１および第２基材４２を介して負極板２０Ｙの負極接続部２３を挟持する。ここで、第１方向ｄ１における第２挟持部６２の寸法ｄｍ２は、上述した第１方向ｄ１における負極タブ側部４３ｂの寸法ｄｘ２以下の寸法になっている。このため、第２挟持部６２に第２被挟持領域Ｓ２を挟持させることができる。
On the other hand, in the step of sandwiching the second sandwiched area S2, first, the pair of second sandwiched portions 62 of the sandwiching device 60 is moved to a position where the second sandwiched area S2 of the laminated battery 1 can be sandwiched. Let me. More specifically, one of the second sandwiching portions 62 is positioned on one side of the negative electrode tab side portion 43b so as to face the negative electrode tab side portion 43b, and the other second sandwiching portion 62 is located on the negative electrode tab side portion 43b. It is positioned on the other side so as to face the negative electrode tab side portion 43b (see FIG. 9). Subsequently, the pair of second sandwiching portions 62 sandwiches the second sandwiched area S2 with a predetermined pressing force. At this time, the second sandwiching portion 62 sandwiches the negative electrode connecting portion 23 of the negative electrode plate 20Y via the first base material 41 and the second base material 42. Here, the dimension dm2 of the second sandwiching portion 62 in the first direction d1 is equal to or less than the dimension dx2 of the negative electrode tab side portion 43b in the first direction d1 described above. Therefore, the second sandwiched area S2 can be sandwiched by the second sandwiched portion 62.
このようにして、図８および図９に示すように、挟持装置６０により積層型電池１の第１被挟持領域Ｓ１および第２被挟持領域Ｓ２が挟持される。なお、第１被挟持領域Ｓ１を挟持する工程と第２被挟持領域Ｓ２を挟持する工程は、同時に行われてもよいが、異なるタイミングで行われてもよい。
In this way, as shown in FIGS. 8 and 9, the first sandwiched area S1 and the second sandwiched area S2 of the laminated battery 1 are sandwiched by the sandwiching device 60. The step of sandwiching the first sandwiched area S1 and the step of sandwiching the second sandwiched area S2 may be performed at the same time, but may be performed at different timings.
（搬送工程）
挟持工程の後に、搬送工程が行われる。搬送工程では、挟持装置６０により被挟持領域Ｓ１，Ｓ２を挟持しながら積層型電池１を吊り下げて搬送する。 (Transport process)
After the pinching process, a transporting process is performed. In the transfer step, thelaminated battery 1 is suspended and conveyed while sandwiching the sandwiched areas S1 and S2 by the sandwiching device 60.
挟持工程の後に、搬送工程が行われる。搬送工程では、挟持装置６０により被挟持領域Ｓ１，Ｓ２を挟持しながら積層型電池１を吊り下げて搬送する。 (Transport process)
After the pinching process, a transporting process is performed. In the transfer step, the
この搬送工程においては、まず、図８に示すような、挟持装置６０により積層型電池１の第１被挟持領域Ｓ１および第２被挟持領域Ｓ２を挟持した状態で、挟持装置６０の第１挟持部６１および第２挟持部６２を上昇させる。これにより、図１０に示すように、積層型電池１は、ステージ５０の載置面５１から離間し、挟持装置６０により吊り下げられる。続いて、第１挟持部６１および第２挟持部６２を水平方向に移動させて、積層型電池１を所望の目標位置（次の工程、例えば積層型電池の検査工程が行われる位置）まで搬送する。積層型電池１が当該目標位置に達した後、第１挟持部６１および第２挟持部６２を下降させ、積層型電池１を起立状態で当該目標位置に設けられたスリットを有するトレー（不図示）に収容させる。その後、第１挟持部６１を第１被挟持領域Ｓ１から取り外すとともに、第２挟持部６２を第２被挟持領域Ｓ２から取り外し、第１挟持部６１および第２挟持部６２を退避させる。
In this transfer step, first, as shown in FIG. 8, in a state where the first sandwiched area S1 and the second sandwiched area S2 of the laminated battery 1 are sandwiched by the sandwiching device 60, the first sandwiching device 60 is sandwiched. The portion 61 and the second sandwiching portion 62 are raised. As a result, as shown in FIG. 10, the laminated battery 1 is separated from the mounting surface 51 of the stage 50 and suspended by the holding device 60. Subsequently, the first holding portion 61 and the second holding portion 62 are moved in the horizontal direction to transport the laminated battery 1 to a desired target position (a position where the next step, for example, the inspection step of the laminated battery is performed). To do. After the laminated battery 1 reaches the target position, the first holding portion 61 and the second holding portion 62 are lowered, and the stacked battery 1 is in an upright state and a tray having a slit provided at the target position (not shown). ). After that, the first sandwiching portion 61 is removed from the first sandwiched area S1, the second sandwiching portion 62 is removed from the second sandwiched area S2, and the first sandwiching portion 61 and the second sandwiching portion 62 are retracted.
このようにして、挟持装置６０により被挟持領域Ｓ１，Ｓ２を挟持しながら積層型電池１を吊り下げて搬送することができる。
In this way, the laminated battery 1 can be suspended and conveyed while sandwiching the sandwiched areas S1 and S2 by the sandwiching device 60.
このように本実施の形態によれば、第１方向ｄ１における正極タブ側部４３ａの寸法ｄｘ１が、２０ｍｍ以上である。このことにより、積層型電池１の正極タブ側部４３ａに挟持装置６０が挟持するためのスペースを確保することができる。すなわち、積層型電池１に、挟持装置６０が挟持するための第１被挟持領域Ｓ１を設けることができる。このため、積層型電池１を搬送する際、挟持装置６０に第１被挟持領域Ｓ１を挟持させることができ、挟持装置６０により膨出部領域ＳＢが挟持されることを回避することができる。すなわち、積層型電池１の重量が大きい場合、挟持装置６０による押圧力が高くなり得る。このため、重量が大きい積層型電池１の膨出部領域ＳＢを挟持した場合、膜電極接合体５のうち膨出部４４内に位置する部分（例えば、電極活物質層１２Ｘ，２２Ｙ）が変形する可能性が考えられる。しかしながら、本実施の形態によれば、積層型電池１の重量が大きい場合であっても、第１被挟持領域Ｓ１を挟持することができるため、膨出部領域ＳＢが挟持されることを回避することができる。この結果、積層型電池１の性能低下を抑制することができる。
As described above, according to the present embodiment, the dimension dx1 of the positive electrode tab side portion 43a in the first direction d1 is 20 mm or more. As a result, it is possible to secure a space for the sandwiching device 60 to sandwich the laminated battery 1 on the positive electrode tab side portion 43a. That is, the laminated battery 1 can be provided with the first sandwiched area S1 for sandwiching by the sandwiching device 60. Therefore, when the laminated battery 1 is conveyed, the first sandwiched area S1 can be sandwiched by the sandwiching device 60, and it is possible to prevent the bulging region SB from being sandwiched by the sandwiching device 60. That is, when the weight of the laminated battery 1 is large, the pressing force by the holding device 60 can be high. Therefore, when the bulging portion region SB of the heavy laminated battery 1 is sandwiched, the portion of the membrane electrode assembly 5 located inside the bulging portion 44 (for example, the electrode active material layers 12X and 22Y) is deformed. There is a possibility of doing so. However, according to the present embodiment, even when the weight of the laminated battery 1 is large, the first sandwiched region S1 can be sandwiched, so that the bulge region SB is prevented from being sandwiched. can do. As a result, deterioration of the performance of the laminated battery 1 can be suppressed.
また、本実施の形態によれば、第１方向ｄ１における正極タブ側部４３ａの寸法ｄｘ１が、１００ｍｍ以下である。このことにより、積層方向ｄＬで見たときの第１被挟持領域Ｓ１の面積の増大を抑制することができる。このため、積層型電池１のエネルギー密度の低下を抑制することができる。
Further, according to the present embodiment, the dimension dx1 of the positive electrode tab side portion 43a in the first direction d1 is 100 mm or less. As a result, it is possible to suppress an increase in the area of the first sandwiched region S1 when viewed in the stacking direction dL. Therefore, it is possible to suppress a decrease in the energy density of the laminated battery 1.
また、本実施の形態によれば、第２方向ｄ２における正極タブ側部４３ａの寸法Ｗが、１００ｍｍ以上である。この場合、第１被挟持領域Ｓ１を、第１挟持部６１の第２方向ｄ２における全域で第１挟持部６１に挟持させることができる。このため、挟持装置６０により、第１被挟持領域Ｓ１をより一層しっかりと保持することができる。
Further, according to the present embodiment, the dimension W of the positive electrode tab side portion 43a in the second direction d2 is 100 mm or more. In this case, the first sandwiched area S1 can be sandwiched by the first sandwiched portion 61 over the entire area of the first sandwiched portion 61 in the second direction d2. Therefore, the pinching device 60 can hold the first pinched area S1 more firmly.
また、本実施の形態によれば、正極タブ側部４３ａが、正極板１０Ｘの正極接続領域ａ１に対向している。このことにより、挟持装置６０により第１被挟持領域Ｓ１を挟持した際、挟持装置６０に第１基材４１および第２基材４２を介して正極板１０Ｘの正極接続領域ａ１を挟持させることができる。このため、挟持装置６０により、積層型電池１をより一層しっかりと保持することができる。また、正極接続領域ａ１には正極活物質層１２Ｘが設けられていないため、正極接続領域ａ１を所定の押圧力で挟持した場合であっても、積層型電池１の性能低下を抑制することができる。
Further, according to the present embodiment, the positive electrode tab side portion 43a faces the positive electrode connection region a1 of the positive electrode plate 10X. As a result, when the first sandwiched area S1 is sandwiched by the sandwiching device 60, the sandwiching device 60 can sandwich the positive electrode connection region a1 of the positive electrode plate 10X via the first base material 41 and the second base material 42. it can. Therefore, the holding device 60 can hold the laminated battery 1 more firmly. Further, since the positive electrode active material layer 12X is not provided in the positive electrode connection region a1, even when the positive electrode connection region a1 is sandwiched by a predetermined pressing force, deterioration of the performance of the laminated battery 1 can be suppressed. it can.
また、本実施の形態によれば、第１方向ｄ１における負極タブ側部４３ｂの寸法が、２０ｍｍ以上である。このことにより、積層型電池１の負極タブ側部４３ｂに挟持装置６０が挟持するためのスペースを確保することができる。すなわち、積層型電池１に、挟持装置６０が挟持するための第２被挟持領域Ｓ２を設けることができる。このため、積層型電池１を搬送する際、挟持装置６０に第１被挟持領域Ｓ１および第２被挟持領域Ｓ２の両方を挟持させることができ、積層型電池１をより一層しっかりと保持することができる。
Further, according to the present embodiment, the dimension of the negative electrode tab side portion 43b in the first direction d1 is 20 mm or more. As a result, it is possible to secure a space for the sandwiching device 60 to sandwich the negative electrode tab side portion 43b of the laminated battery 1. That is, the laminated battery 1 can be provided with a second sandwiched area S2 for sandwiching by the sandwiching device 60. Therefore, when the laminated battery 1 is conveyed, both the first sandwiched area S1 and the second sandwiched area S2 can be sandwiched by the sandwiching device 60, and the laminated battery 1 can be held more firmly. Can be done.
また、本実施の形態によれば、第１方向ｄ１における負極タブ側部４３ｂの寸法ｄｘ２が、１００ｍｍ以下である。このことにより、積層方向ｄＬで見たときの第２被挟持領域Ｓ２の面積の増大を抑制することができる。このため、積層型電池１のエネルギー密度の低下を抑制することができる。
Further, according to the present embodiment, the dimension dx2 of the negative electrode tab side portion 43b in the first direction d1 is 100 mm or less. As a result, it is possible to suppress an increase in the area of the second sandwiched region S2 when viewed in the stacking direction dL. Therefore, it is possible to suppress a decrease in the energy density of the laminated battery 1.
また、本実施の形態によれば、第２方向ｄ２における負極タブ側部４３ｂの寸法Ｗが、１００ｍｍ以上である。この場合、第２被挟持領域Ｓ２を、第２挟持部６２の第２方向ｄ２における全域で第２挟持部６２に挟持させることができる。このため、挟持装置６０により、第２被挟持領域Ｓ２をより一層しっかりと保持することができる。
Further, according to the present embodiment, the dimension W of the negative electrode tab side portion 43b in the second direction d2 is 100 mm or more. In this case, the second sandwiched area S2 can be sandwiched by the second sandwiched portion 62 over the entire area of the second sandwiched portion 62 in the second direction d2. Therefore, the sandwiching device 60 can hold the second sandwiched area S2 more firmly.
また、本実施の形態によれば、負極タブ側部４３ｂが、負極板２０Ｙの負極接続領域ａ２に対向している。このことにより、挟持装置６０により第２被挟持領域Ｓ２を挟持した際、挟持装置６０に第１基材４１および第２基材４２を介して負極板２０Ｙの負極接続領域ａ２を挟持させることができる。このため、挟持装置６０により、積層型電池１をより一層しっかりと保持することができる。また、負極接続領域ａ２には負極活物質層２２Ｙが設けられていないため、負極接続領域ａ２を所定の押圧力で挟持した場合であっても、積層型電池１の性能低下を抑制することができる。
Further, according to the present embodiment, the negative electrode tab side portion 43b faces the negative electrode connection region a2 of the negative electrode plate 20Y. As a result, when the second sandwiched area S2 is sandwiched by the sandwiching device 60, the sandwiching device 60 can sandwich the negative electrode connection region a2 of the negative electrode plate 20Y via the first base material 41 and the second base material 42. it can. Therefore, the holding device 60 can hold the laminated battery 1 more firmly. Further, since the negative electrode active material layer 22Y is not provided in the negative electrode connection region a2, it is possible to suppress the deterioration of the performance of the laminated battery 1 even when the negative electrode connection region a2 is sandwiched by a predetermined pressing force. it can.
また、本実施の形態によれば、第１基材４１および第２基材４２は、金属層４０ａと、金属層４０ａの内面に設けられた樹脂接着層４０ｂと、を含んでいる。一般に、積層型電池１の外装体４０としてこのような所謂ラミネートフィルム型外装体を用いた場合、外装体４０の強度が低下し得る。このため、このような外装体４０を有する積層型電池１の膨出部領域ＳＢが挟持装置６０により挟持された場合、膨出部４４内に位置する部分がより変形し易くなる。これに対して本実施の形態によれば、このような所謂ラミネートフィルム型外装体を用いた場合であっても、第１被挟持領域Ｓ１を挟持することができるため、膨出部領域ＳＢが挟持されることを回避することができる。この結果、積層型電池１の性能低下を抑制することができる。
Further, according to the present embodiment, the first base material 41 and the second base material 42 include a metal layer 40a and a resin adhesive layer 40b provided on the inner surface of the metal layer 40a. Generally, when such a so-called laminated film type exterior body is used as the exterior body 40 of the laminated battery 1, the strength of the exterior body 40 may decrease. Therefore, when the bulging portion region SB of the laminated battery 1 having such an exterior body 40 is sandwiched by the sandwiching device 60, the portion located in the bulging portion 44 is more easily deformed. On the other hand, according to the present embodiment, even when such a so-called laminated film type exterior body is used, the first sandwiched region S1 can be sandwiched, so that the bulging portion region SB is formed. It is possible to avoid being pinched. As a result, deterioration of the performance of the laminated battery 1 can be suppressed.
以上において、具体例を参照しながら一実施の形態を説明してきたが、上述した具体例が一実施の形態を限定することを意図していない。上述した一実施の形態は、その他の様々な具体例で実施されることが可能であり、その要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。
In the above, one embodiment has been described with reference to a specific example, but the above-mentioned specific example is not intended to limit one embodiment. The above-described embodiment can be implemented in various other specific examples, and various omissions, replacements, and changes can be made without departing from the gist thereof.
以下、図面を参照しながら、変形の一例について説明する。以下の説明および以下の説明で用いる図面では、上述した具体例と同様に構成され得る部分について、上述の具体例における対応する部分に対して用いた符号と同一の符号を用いるとともに、重複する説明を省略する。
Hereinafter, an example of modification will be described with reference to the drawings. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding parts in the above-mentioned specific examples are used for the parts that can be configured in the same manner as the above-mentioned specific examples, and the same reference numerals are used, and duplicate explanations are given. Is omitted.
（第１の変形例）
上述した実施の形態において、第１方向ｄ１における正極タブ側部４３ａの寸法ｄｘ１および負極タブ側部４３ｂの寸法ｄｘ２の両方が２０ｍｍ以上であり、挟持装置６０により第１被挟持領域Ｓ１および第２被挟持領域Ｓ２の両方を挟持して積層型電池１を搬送する例を示した。しかしながら、このことに限定されることはなく、挟持装置６０により第１被挟持領域Ｓ１ａのみを挟持して積層型電池１を搬送することができれば、負極タブ側部４３ｂの寸法は２０ｍｍ以上でなくてもよい。また、同様に、挟持装置６０により第２被挟持領域Ｓ２のみを挟持して積層型電池１を搬送することができれば、正極タブ側部４３ａの寸法は２０ｍｍ以上でなくてもよい。 (First modification)
In the above-described embodiment, both the dimension dx1 of the positive electrodetab side portion 43a and the dimension dx2 of the negative electrode tab side portion 43b in the first direction d1 are 20 mm or more, and the first sandwiched area S1 and the second sandwiched area S1 and the second by the sandwiching device 60. An example of transporting the laminated battery 1 by sandwiching both of the sandwiched areas S2 is shown. However, the present invention is not limited to this, and if the sandwiching device 60 can sandwich only the first sandwiched area S1a and convey the laminated battery 1, the size of the negative electrode tab side portion 43b is not 20 mm or more. You may. Similarly, if the sandwiching device 60 can sandwich only the second sandwiched area S2 and convey the laminated battery 1, the size of the positive electrode tab side portion 43a does not have to be 20 mm or more.
上述した実施の形態において、第１方向ｄ１における正極タブ側部４３ａの寸法ｄｘ１および負極タブ側部４３ｂの寸法ｄｘ２の両方が２０ｍｍ以上であり、挟持装置６０により第１被挟持領域Ｓ１および第２被挟持領域Ｓ２の両方を挟持して積層型電池１を搬送する例を示した。しかしながら、このことに限定されることはなく、挟持装置６０により第１被挟持領域Ｓ１ａのみを挟持して積層型電池１を搬送することができれば、負極タブ側部４３ｂの寸法は２０ｍｍ以上でなくてもよい。また、同様に、挟持装置６０により第２被挟持領域Ｓ２のみを挟持して積層型電池１を搬送することができれば、正極タブ側部４３ａの寸法は２０ｍｍ以上でなくてもよい。 (First modification)
In the above-described embodiment, both the dimension dx1 of the positive electrode
このように、第１方向ｄ１における正極タブ側部４３ａの寸法ｄｘ１および負極タブ側部４３ｂの寸法ｄｘ２のいずれか一方のみが２０ｍｍ以上であってもよい。このような場合であっても、積層型電池１を搬送する際、挟持装置６０に第１被挟持領域Ｓ１または第２被挟持領域Ｓ２を挟持させることができ、積層型電池１の性能低下を抑制することができる。
As described above, only one of the dimension dx1 of the positive electrode tab side portion 43a and the dimension dx2 of the negative electrode tab side portion 43b in the first direction d1 may be 20 mm or more. Even in such a case, when the laminated battery 1 is conveyed, the sandwiching device 60 can sandwich the first sandwiched area S1 or the second sandwiched area S2, which reduces the performance of the laminated battery 1. It can be suppressed.
（第２の変形例）
また、上述した実施の形態において、積層型電池の搬送方法は、起立工程を備えており、起立工程において積層型電池１を起立状態にしてから、挟持工程において積層型電池１の被挟持領域Ｓ１，Ｓ２を挟持する例を示した。しかしながら、このことに限定されることはなく、積層型電池の搬送方法は、起立工程を備えていなくてもよい。この場合、積層型電池１の積層方向ｄＬがステージ５０の載置面５１に直交するように積層型電池１がステージ５０上に載置された状態で、積層型電池１の被挟持領域Ｓ１，Ｓ２を挟持装置６０により挟持するようにしてもよい。 (Second modification)
Further, in the above-described embodiment, the method for transporting the laminated battery includes an upright step, and after thelaminated battery 1 is brought into an upright state in the upright step, the held area S1 of the laminated battery 1 is held in the holding step. , S2 is sandwiched. However, the method of transporting the laminated battery is not limited to this, and the method of transporting the laminated battery may not include an upright step. In this case, with the laminated battery 1 mounted on the stage 50 so that the stacking direction dL of the laminated battery 1 is orthogonal to the mounting surface 51 of the stage 50, the sandwiched area S1 of the laminated battery 1 S2 may be sandwiched by the sandwiching device 60.
また、上述した実施の形態において、積層型電池の搬送方法は、起立工程を備えており、起立工程において積層型電池１を起立状態にしてから、挟持工程において積層型電池１の被挟持領域Ｓ１，Ｓ２を挟持する例を示した。しかしながら、このことに限定されることはなく、積層型電池の搬送方法は、起立工程を備えていなくてもよい。この場合、積層型電池１の積層方向ｄＬがステージ５０の載置面５１に直交するように積層型電池１がステージ５０上に載置された状態で、積層型電池１の被挟持領域Ｓ１，Ｓ２を挟持装置６０により挟持するようにしてもよい。 (Second modification)
Further, in the above-described embodiment, the method for transporting the laminated battery includes an upright step, and after the
このような場合であっても、積層型電池１を搬送する際、挟持装置６０に第１被挟持領域Ｓ１を挟持させることができ、積層型電池１の性能低下を抑制することができる。
Even in such a case, when the laminated battery 1 is conveyed, the first sandwiched area S1 can be sandwiched by the sandwiching device 60, and the performance deterioration of the laminated battery 1 can be suppressed.
（第３の変形例）
また、上述した実施の形態において、第１基材４１と第２基材４２とが、別体として構成されている例を示した。しかしながら、このことに限定されることはなく、第１基材４１と第２基材４２とが、一体的に連続状に形成されていてもよい。例えば、第１基材４１と第２基材４２とが、第２方向ｄ２における一側で連続して、単一のシート状に形成されていてもよい。そして、第１基材４１と第２基材４２との境界で折り曲げられて、外装体４０が形成されてもよい。この折り曲げた部分にはシール部４６が形成されていなくてもよい。 (Third variant)
Further, in the above-described embodiment, an example is shown in which thefirst base material 41 and the second base material 42 are configured as separate bodies. However, the present invention is not limited to this, and the first base material 41 and the second base material 42 may be integrally and continuously formed. For example, the first base material 41 and the second base material 42 may be continuously formed in a single sheet shape on one side in the second direction d2. Then, the exterior body 40 may be formed by being bent at the boundary between the first base material 41 and the second base material 42. The seal portion 46 may not be formed on the bent portion.
また、上述した実施の形態において、第１基材４１と第２基材４２とが、別体として構成されている例を示した。しかしながら、このことに限定されることはなく、第１基材４１と第２基材４２とが、一体的に連続状に形成されていてもよい。例えば、第１基材４１と第２基材４２とが、第２方向ｄ２における一側で連続して、単一のシート状に形成されていてもよい。そして、第１基材４１と第２基材４２との境界で折り曲げられて、外装体４０が形成されてもよい。この折り曲げた部分にはシール部４６が形成されていなくてもよい。 (Third variant)
Further, in the above-described embodiment, an example is shown in which the
このような場合であっても、第１方向ｄ１における正極タブ側部４３ａの寸法ｄｘ１が、２０ｍｍ以上であることにより、積層型電池１を搬送する際、挟持装置６０に第１被挟持領域Ｓ１を挟持させることができ、積層型電池１の性能低下を抑制することができる。
Even in such a case, when the dimension dx1 of the positive electrode tab side portion 43a in the first direction d1 is 20 mm or more, the first sandwiched area S1 is transferred to the sandwiching device 60 when the laminated battery 1 is conveyed. Can be sandwiched, and deterioration of the performance of the laminated battery 1 can be suppressed.
（第４の変形例）
また、上述した実施の形態において、第１基材５１のみが、膨出部４４を有する例を示した。しかしながら、このことに限定されることはなく、図１１に示すように、第２基材４２が、第１基材４１と同様に、周辺部４３’と、周辺部４３’に対して第１基材４１の側とは反対側（第２基材４２の金属層４０ａの側）に膨出した膨出部４４’と、を有していてもよい。また、第２基材４２の周辺部４３’は、第１方向ｄ１において正極タブ１６の側の外端縁４１ａ’（図１１における右側）から内側に延びる正極タブ側部４３ａ’と、第１方向ｄ１において負極タブ２６の側の外端縁４１ｂ’（図１１における左側）から内側に延びる負極タブ側部４３ｂ’と、を含んでいてもよい。そして、膨出部４４’は、第１方向ｄ１において正極タブ側部４３ａ’の内端４３ｅ’から負極タブ側部４３ｂ’の内端４３ｆ’にわたって形成されていてもよい。 (Fourth modification)
Further, in the above-described embodiment, an example is shown in which only thefirst base material 51 has the bulging portion 44. However, the present invention is not limited to this, and as shown in FIG. 11, the second base material 42 is the first with respect to the peripheral portion 43'and the peripheral portion 43', similarly to the first base material 41. It may have a bulging portion 44'that bulges on the side opposite to the side of the base material 41 (the side of the metal layer 40a of the second base material 42). Further, the peripheral portion 43'of the second base material 42 includes the positive electrode tab side portion 43a' extending inward from the outer edge 41a'(right side in FIG. 11) on the positive electrode tab 16 side in the first direction d1 and the first. The negative electrode tab side portion 43b'extending inward from the outer edge 41b'(left side in FIG. 11) on the negative electrode tab 26 side in the direction d1 may be included. The bulging portion 44'may be formed from the inner end 43e'of the positive electrode tab side portion 43a' to the inner end 43f' of the negative electrode tab side portion 43b'in the first direction d1.
また、上述した実施の形態において、第１基材５１のみが、膨出部４４を有する例を示した。しかしながら、このことに限定されることはなく、図１１に示すように、第２基材４２が、第１基材４１と同様に、周辺部４３’と、周辺部４３’に対して第１基材４１の側とは反対側（第２基材４２の金属層４０ａの側）に膨出した膨出部４４’と、を有していてもよい。また、第２基材４２の周辺部４３’は、第１方向ｄ１において正極タブ１６の側の外端縁４１ａ’（図１１における右側）から内側に延びる正極タブ側部４３ａ’と、第１方向ｄ１において負極タブ２６の側の外端縁４１ｂ’（図１１における左側）から内側に延びる負極タブ側部４３ｂ’と、を含んでいてもよい。そして、膨出部４４’は、第１方向ｄ１において正極タブ側部４３ａ’の内端４３ｅ’から負極タブ側部４３ｂ’の内端４３ｆ’にわたって形成されていてもよい。 (Fourth modification)
Further, in the above-described embodiment, an example is shown in which only the
第１方向ｄ１における第２基材４２の正極タブ側部４３ａ’の寸法ｄｘ１’は、第１基材４１の正極タブ側部４３ａの寸法ｄｘ１と等しくてもよい。また、第１方向ｄ１における第２基材４２の負極タブ側部４３ｂ’の寸法ｄｘ２’も、第１基材４１の負極タブ側部４３ａ’の寸法ｄｘ２と等しくてもよい。この場合、積層方向ｄＬで見たときに、第２基材４２の正極タブ側部４３ａ’は、第１被挟持領域Ｓ１に位置し、第２基材４２の負極タブ側部４３ｂ’は、第２被挟持領域Ｓ２に位置する。また、積層方向ｄＬで見たときに、第２基材４２の膨出部４４’は、膨出部領域ＳＢに位置する。しかしながら、このことに限定されることはなく、第１方向ｄ１における第２基材４２の正極タブ側部４３ａ’の寸法ｄｘ１’は、第１基材４１の正極タブ側部４３ａの寸法ｄｘ１よりも大きくてもよい。また、第１方向ｄ１における第２基材４２の負極タブ側部４３ｂ’の寸法ｄｘ２’も、第１基材４１の負極タブ側部４３ａ’の寸法ｄｘ２よりも大きくてもよい。この場合、積層方向ｄＬで見たときに、第２基材４２の正極タブ側部４３ａ’の一部が、第１被挟持領域Ｓ１に位置し、残りの部分が、膨出部領域ＳＢ内に位置する。また、積層方向ｄＬで見たときに、第２基材４２の負極タブ側部４３ｂ’の一部が、第２被挟持領域Ｓ２に位置し、残りの部分が、膨出部領域ＳＢ内に位置する。また、積層方向ｄＬで見たときに、第２基材４２の膨出部４４’は、膨出部領域ＳＢ内に位置する。
The dimension dx1'of the positive electrode tab side portion 43a'of the second base material 42 in the first direction d1 may be equal to the dimension dx1 of the positive electrode tab side portion 43a of the first base material 41. Further, the dimension dx2'of the negative electrode tab side portion 43b'of the second base material 42 in the first direction d1 may be equal to the dimension dx2 of the negative electrode tab side portion 43a' of the first base material 41. In this case, when viewed in the stacking direction dL, the positive electrode tab side portion 43a'of the second base material 42 is located in the first sandwiched region S1, and the negative electrode tab side portion 43b' of the second base material 42 is located. It is located in the second pinched area S2. Further, when viewed in the stacking direction dL, the bulging portion 44'of the second base material 42 is located in the bulging portion region SB. However, the present invention is not limited to this, and the dimension dx1'of the positive electrode tab side portion 43a'of the second base material 42 in the first direction d1 is larger than the dimension dx1 of the positive electrode tab side portion 43a of the first base material 41. May be large. Further, the dimension dx2'of the negative electrode tab side portion 43b'of the second base material 42 in the first direction d1 may also be larger than the dimension dx2 of the negative electrode tab side portion 43a' of the first base material 41. In this case, when viewed in the stacking direction dL, a part of the positive electrode tab side portion 43a'of the second base material 42 is located in the first sandwiched region S1, and the remaining portion is in the bulging portion region SB. Located in. Further, when viewed in the stacking direction dL, a part of the negative electrode tab side portion 43b'of the second base material 42 is located in the second sandwiched region S2, and the remaining portion is in the bulging portion region SB. To position. Further, when viewed in the stacking direction dL, the bulging portion 44'of the second base material 42 is located in the bulging portion region SB.
このように第１基材４１および第２基材４２の両方が、膨出部４４、４４’を有する場合であっても、第１方向ｄ１における正極タブ側部４３ａの寸法ｄｘ１が、２０ｍｍ以上であることにより、積層型電池１を搬送する際、挟持装置６０に第１被挟持領域Ｓ１を挟持させることができ、積層型電池１の性能低下を抑制することができる。また、本変形例によれば、第１基材４１の膨出部４４と第２基材４２の膨出部４４’との両方により封止空間４５を画定することができる。このため、封止空間４５により多くの電極板１０Ｘ，２０Ｙを収容することができ、積層型電池１の容量を増大させることができる。
As described above, even when both the first base material 41 and the second base material 42 have the bulging portions 44 and 44', the dimension dx1 of the positive electrode tab side portion 43a in the first direction d1 is 20 mm or more. Therefore, when the laminated battery 1 is conveyed, the sandwiching device 60 can sandwich the first sandwiched region S1, and the performance deterioration of the laminated battery 1 can be suppressed. Further, according to this modification, the sealing space 45 can be defined by both the bulging portion 44 of the first base material 41 and the bulging portion 44'of the second base material 42. Therefore, more electrode plates 10X and 20Y can be accommodated in the sealing space 45, and the capacity of the laminated battery 1 can be increased.
（第５の変形例）
また、上述した実施の形態において、正極板１０Ｘおよび負極板２０Ｙの間に絶縁シート３１が配置されている例を示した。しかしながら、このことに限定されることはなく、正極板１０Ｘおよび負極板２０Ｙの間に絶縁シート３１が配置されていなくてもよい。このような場合であっても、正極板１０Ｘおよび負極板２０Ｙの少なくとも一方が、他方に対向する面に機能層３０Ａを有していることにより、正極板１０Ｘおよび負極板２０Ｙが短絡することを防止することができる。 (Fifth variant)
Further, in the above-described embodiment, an example in which the insulatingsheet 31 is arranged between the positive electrode plate 10X and the negative electrode plate 20Y is shown. However, the present invention is not limited to this, and the insulating sheet 31 may not be arranged between the positive electrode plate 10X and the negative electrode plate 20Y. Even in such a case, since at least one of the positive electrode plate 10X and the negative electrode plate 20Y has the functional layer 30A on the surface facing the other, the positive electrode plate 10X and the negative electrode plate 20Y are short-circuited. Can be prevented.
また、上述した実施の形態において、正極板１０Ｘおよび負極板２０Ｙの間に絶縁シート３１が配置されている例を示した。しかしながら、このことに限定されることはなく、正極板１０Ｘおよび負極板２０Ｙの間に絶縁シート３１が配置されていなくてもよい。このような場合であっても、正極板１０Ｘおよび負極板２０Ｙの少なくとも一方が、他方に対向する面に機能層３０Ａを有していることにより、正極板１０Ｘおよび負極板２０Ｙが短絡することを防止することができる。 (Fifth variant)
Further, in the above-described embodiment, an example in which the insulating
Claims (11)
- 積層型電池であって、
第１基材と第２基材とを有し、前記第１基材と前記第２基材との間に封止空間を形成する外装体と、
前記封止空間に設けられた膜電極接合体であって、積層方向に交互に積層された複数の第１電極板および複数の第２電極板を有する膜電極接合体と、
前記積層方向で見たときの第１方向において前記膜電極接合体の一側に接続され、前記第１方向において前記外装体の外側に延び出た第１タブと、を備え、
前記第１基材は、前記第１方向において前記第１タブの側の外端縁から内側に延びる第１タブ側部と、前記第１タブ側部の前記第１方向における内端から前記第１タブ側部に対して前記第２基材の側とは反対側に膨出し、前記封止空間を画定する膨出部と、を含み、
前記積層型電池の重量は、５００ｇ以上であり、
前記第１方向における前記第１タブ側部の寸法は、２０ｍｍ以上である、
積層型電池。 It ’s a stacked battery,
An exterior body having a first base material and a second base material and forming a sealing space between the first base material and the second base material,
A membrane electrode assembly provided in the sealing space, the membrane electrode assembly having a plurality of first electrode plates and a plurality of second electrode plates alternately laminated in the stacking direction.
A first tab connected to one side of the membrane electrode assembly in the first direction when viewed in the stacking direction and extending to the outside of the exterior body in the first direction is provided.
The first base material is the first tab side portion extending inward from the outer edge on the side of the first tab in the first direction, and the first base material from the inner end of the first tab side portion in the first direction. The tab side portion includes a bulging portion that bulges on the side opposite to the side of the second base material and defines the sealing space.
The weight of the laminated battery is 500 g or more, and the weight is 500 g or more.
The dimension of the first tab side portion in the first direction is 20 mm or more.
Stacked battery. - 前記第１方向における前記第１タブ側部の寸法は、１００ｍｍ以下である、
請求項１に記載の積層型電池。 The dimension of the first tab side portion in the first direction is 100 mm or less.
The laminated battery according to claim 1. - 前記積層方向で見たときに前記第１方向に直交する第２方向における前記第１タブ側部の寸法は、１００ｍｍ以上である、
請求項１または２に記載の積層型電池。 The dimension of the first tab side portion in the second direction orthogonal to the first direction when viewed in the stacking direction is 100 mm or more.
The laminated battery according to claim 1 or 2. - 前記第１電極板は、互いに隣接する第１接続領域および第１有効領域を含む第１電極集電体と、前記第１有効領域に設けられた第１電極活物質層と、を含み、
前記第１タブ側部は、前記第１電極板の前記第１接続領域に対向している、
請求項１から３のいずれか一項に記載の積層型電池。 The first electrode plate includes a first electrode current collector including a first connection region and a first effective region adjacent to each other, and a first electrode active material layer provided in the first effective region.
The first tab side portion faces the first connection region of the first electrode plate.
The laminated battery according to any one of claims 1 to 3. - 前記第１方向において前記膜電極接合体の他側に接続され、前記第１方向において前記外装体の外側に延び出た第２タブを更に備え、
前記第１基材は、前記第１方向において前記第２タブの側の外端縁から内側に延びる第２タブ側部を含み、
前記膨出部は、前記第１方向において前記第１タブ側部の内端から前記第２タブ側部の内端にわたって形成され、
前記第１方向における前記第２タブ側部の寸法は、２０ｍｍ以上である、
請求項１から４のいずれか一項に記載の積層型電池。 Further comprising a second tab connected to the other side of the membrane electrode assembly in the first direction and extending outward of the exterior in the first direction.
The first substrate includes a second tab side portion extending inward from the outer edge on the side of the second tab in the first direction.
The bulging portion is formed from the inner end of the first tab side portion to the inner end of the second tab side portion in the first direction.
The dimension of the second tab side portion in the first direction is 20 mm or more.
The laminated battery according to any one of claims 1 to 4. - 前記第１方向における前記第２タブ側部の寸法は、１００ｍｍ以下である、
請求項５に記載の積層型電池。 The dimension of the second tab side portion in the first direction is 100 mm or less.
The laminated battery according to claim 5. - 前記積層方向で見たときに前記第１方向に直交する第２方向における前記第２タブ側部の寸法は、１００ｍｍ以上である、
請求項５または６に記載の積層型電池。 The dimension of the second tab side portion in the second direction orthogonal to the first direction when viewed in the stacking direction is 100 mm or more.
The stacked battery according to claim 5 or 6. - 前記第２電極板は、互いに隣接する第２接続領域および第２有効領域を含む第２電極集電体と、前記第２有効領域に設けられた第２電極活物質層と、を含み、
前記第２タブ側部は、前記第２電極板の前記第２接続領域に対向している、
請求項５から７のいずれか一項に記載の積層型電池。 The second electrode plate includes a second electrode current collector including a second connection region and a second effective region adjacent to each other, and a second electrode active material layer provided in the second effective region.
The second tab side portion faces the second connection region of the second electrode plate.
The laminated battery according to any one of claims 5 to 7. - 前記第１基材および前記第２基材は、金属層と、前記金属層の内面に設けられた樹脂接着層と、をそれぞれ含み、
前記第１基材の前記膨出部および前記第１タブ側部は、前記金属層および前記樹脂接着層で構成されている、
請求項１から８のいずれか一項に記載の積層型電池。 The first base material and the second base material each include a metal layer and a resin adhesive layer provided on the inner surface of the metal layer.
The bulging portion and the first tab side portion of the first base material are composed of the metal layer and the resin adhesive layer.
The laminated battery according to any one of claims 1 to 8. - 請求項１から９のいずれか一項に記載の積層型電池を準備する準備工程と、
前記積層方向で見たときに前記積層型電池のうち前記第１タブ側部と重なる領域として画定される被挟持領域を、挟持装置により挟持する挟持工程と、
前記挟持装置により前記被挟持領域を挟持しながら前記積層型電池を吊り下げて搬送する搬送工程と、を備える、
積層型電池の搬送方法。 The preparatory step for preparing the laminated battery according to any one of claims 1 to 9.
A sandwiching step of sandwiching a sandwiched area defined as an area overlapping the first tab side portion of the laminated battery when viewed in the stacking direction by a sandwiching device.
A transfer step of suspending and transporting the laminated battery while sandwiching the sandwiched area by the sandwiching device is provided.
A method for transporting stacked batteries. - 前記挟持工程の前に前記積層型電池を起立させる起立工程を更に備える、
請求項１０に記載の積層型電池の搬送方法。 A standing step of standing the laminated battery is further provided before the pinching step.
The method for transporting a laminated battery according to claim 10.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023098304A1 (en) * | 2021-11-30 | 2023-06-08 | 宁德时代新能源科技股份有限公司 | Battery cell, battery and electrical apparatus |
| WO2023236346A1 (en) * | 2022-06-09 | 2023-12-14 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electric apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013122098A1 (en) * | 2012-02-13 | 2013-08-22 | 日産自動車株式会社 | Battery cell storage apparatus and storage apparatus transport system |
| JP2017041430A (en) * | 2015-08-21 | 2017-02-23 | 日産自動車株式会社 | Battery cell housing device |
| JP2017152092A (en) * | 2016-02-22 | 2017-08-31 | 凸版印刷株式会社 | Exterior packaging material for power storage device, and power storage device using the same |
| JP2018022678A (en) * | 2016-07-20 | 2018-02-08 | 日産自動車株式会社 | Battery take-out device |
| JP2019145756A (en) * | 2018-02-23 | 2019-08-29 | Tdk株式会社 | Electrochemical device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013132673A1 (en) * | 2012-03-05 | 2013-09-12 | 新日鉄住金マテリアルズ株式会社 | Resin-metal composite seal container and method for producing same |
| JP6659254B2 (en) * | 2015-06-30 | 2020-03-04 | 日産自動車株式会社 | Secondary battery and method of manufacturing the same |
-
2019
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2020
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013122098A1 (en) * | 2012-02-13 | 2013-08-22 | 日産自動車株式会社 | Battery cell storage apparatus and storage apparatus transport system |
| JP2017041430A (en) * | 2015-08-21 | 2017-02-23 | 日産自動車株式会社 | Battery cell housing device |
| JP2017152092A (en) * | 2016-02-22 | 2017-08-31 | 凸版印刷株式会社 | Exterior packaging material for power storage device, and power storage device using the same |
| JP2018022678A (en) * | 2016-07-20 | 2018-02-08 | 日産自動車株式会社 | Battery take-out device |
| JP2019145756A (en) * | 2018-02-23 | 2019-08-29 | Tdk株式会社 | Electrochemical device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023098304A1 (en) * | 2021-11-30 | 2023-06-08 | 宁德时代新能源科技股份有限公司 | Battery cell, battery and electrical apparatus |
| WO2023236346A1 (en) * | 2022-06-09 | 2023-12-14 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electric apparatus |
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| JP6853322B2 (en) | 2021-03-31 |
| CN113966559A (en) | 2022-01-21 |
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