Manufacturing method of electrode-attached collector, manufacturing method of power storage device, and power storage device

Abstract

To provide a method for manufacturing an electrode-attached collector with which it is possible to efficiently dry the coated film of a composite material slurry while suppressing an excessive rise of the temperature of an uncoated section of the collector.SOLUTION: A method for manufacturing an electrode-attached collector according to the present disclosure includes: producing a coating material-attached collector; and producing an electrode-attached collector. In producing the coating material-attached collector, a coating of composite material slurry is applied to a collector representing a sheet-like collector having a plurality of open holes or a web-like collector having a plurality of open holes, and at least one coating material-attached collector having the coating of composite material slurry is produced. In producing the electrode-attached collector, the coating material of the coating material-attached collector is irradiated with heating light and a cooling wind is blown to the open holes at the same time to form a cathode or an anode layer which is the dried matter of the coating material and produce the electrode-attached collector.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present disclosure relates to a method for manufacturing a current collector with an electrode, a method for manufacturing a power storage device, and a power storage device.

Background Art

[0002] Patent Document 1 specifically discloses a method for manufacturing an electrode (hereinafter also referred to as a "bipolar electrode") used in a bipolar non-aqueous electrolyte secondary battery (hereinafter also referred to as a "power storage device"). The manufacturing method includes a step of applying a specific slurry (hereinafter also referred to as a "composite slurry") to a current collector to form a coating film and drying it.

[0003] The drying step is carried out in a drying furnace 900 shown in FIG. 8. In the drying furnace 900, a plurality of hot air nozzles 901, a plurality of hot air nozzles 902, and a plurality of heaters 903 are provided. The hot air nozzle 901 supplies high-temperature hot air to the upper surface side of the electrode coating film 910. The electrode coating film 910 includes a current collector 912 on which a coating film 911 is formed. The hot air nozzle 902 supplies low-temperature hot air to the lower surface side of the electrode coating film 910. The heater 903 can uniformly supply infrared rays J to the surface of the coating film 911 on the upper surface side of the current collector 912.

[0004] In the drying step, as shown in FIG. 8, infrared rays J are irradiated onto the coating film 911 on the current collector 912 during drying, and further hot air drying is performed. In hot air drying, the hot air temperature from each of the hot air nozzle 902 and the hot air nozzle 901 is set to a specific temperature, and the temperature distribution in the thickness direction of the electrode coating film 910 during drying is changed. Thereby, the vicinity of the interface between the current collector 912 and the coating film 911 is kept at a low temperature, and the vicinity of the surface of the coating film 911 is made at a high temperature.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the manufacturing method disclosed in Patent Document 1, infrared ray J is irradiated onto the surface of the coating film 911. Therefore, the coating film 911 can be dried in a short time (i.e., efficiently).

[0007] On the other hand, the infrared ray J is radiated radially from the heater 903. Therefore, the infrared ray J supplied from the heater 903 is irradiated not only onto the coating film 911 but also onto the part of the current collector 912 where the coating film 911 is not formed (hereinafter also referred to as the "uncoated part"). As a result, the temperature of the uncoated part of the current collector 912 may rise excessively. The temperature of the overheated uncoated part is, for example, 200°C or higher.

[0008] If the uncoated part has a high-temperature (e.g., 200°C or higher) heat history, there is a risk of deterioration (e.g., surface oxidation, etc.) occurring in the uncoated part. When the surface of the uncoated part is oxidized, the adhesiveness between the uncoated part and the seal part (i.e., the resin) decreases, and the sealing property of the power storage device may decrease. Furthermore, when the surface of the uncoated part is oxidized, the conductivity of the uncoated part becomes poor (i.e., the resistance of the uncoated part increases), and the charge-discharge characteristics of the power storage device may decrease. Therefore, there is a need for a manufacturing method of a current collector with an electrode that can efficiently dry the coating film of the composite slurry while suppressing excessive temperature rise of the uncoated part of the current collector, and a manufacturing method of a power storage device. Furthermore, there is a need for a power storage device with excellent sealing property and charge-discharge characteristics.

[0009] The present disclosure has been made in view of the above circumstances. The problem to be solved by one embodiment of the present disclosure is to provide a manufacturing method of a current collector with an electrode and a manufacturing method of a power storage device that can efficiently dry the coating film of the composite slurry while suppressing excessive temperature rise of the uncoated part of the current collector. The problem to be solved by another embodiment of the present disclosure is to provide a power storage device with excellent sealing property and charge-discharge characteristics.

Means for Solving the Problem

[0010] Means for solving the above problems include the following embodiments.

[0011] <1>The manufacturing method of the current collector with electrodes according to the first aspect is applying a composite material slurry onto a current collector showing a sheet-like current collector having a plurality of through holes or a web-like current collector having a plurality of through holes to produce a current collector with a coating having at least one coating of the composite material slurry, irradiating the coating of the current collector with the coating with heating light and simultaneously blowing cooling air into the through holes to form a positive electrode layer or a negative electrode layer which is a dried product of the coating, thereby producing a current collector with electrodes, and is a manufacturing method of a current collector with electrodes.

[0012] In the present disclosure, the "sheet-like current collector" refers to a current collector included in an energy storage device. The sheet-like current collector is used when manufacturing a current collector with electrodes in a batch manner. The "web-like current collector" refers to a strip-shaped current collector used for manufacturing a current collector with electrodes in a continuous manner. The "main surface" refers to the surface having the largest area among the plurality of surfaces of the current collector.

[0013] The heating light can be irradiated not only on the coating film but also on the uncoated part of the current collector. When the uncoated part of the current collector is irradiated with the heating light, the uncoated part of the current collector may be excessively heated. The temperature of the overheated uncoated part is, for example, 200 °C or higher. In the first aspect, the coating of the current collector with the coating is irradiated with heating light, and simultaneously cooling air is blown into the through holes. Thereby, even if the uncoated part of the current collector is irradiated with the heating light, the uncoated part of the current collector can be efficiently cooled while circulating the cooling air passing through the through holes. Therefore, the uncoated part of the current collector is less likely to be overheated. As a result, the manufacturing method of the current collector with electrodes according to the first aspect can efficiently dry the coating while suppressing excessive temperature rise of the uncoated part of the current collector.

[0014] <2>The manufacturing method of the current collector with electrodes according to the second aspect is The method for manufacturing a current collector with an electrode according to <1> above, wherein the heating light is laser light.

[0015] "Laser light" refers to the heating light emitted from a laser light source.

[0016] The directivity of laser light is higher than that of the heating light (hereinafter also referred to as "lamp light") emitted from a lamp light source. Therefore, laser light is less likely to irradiate the uncoated portion of the current collector than lamp light. As a result, the method for manufacturing a current collector with an electrode according to the second aspect can further suppress excessive temperature rise of the uncoated portion of the current collector.

[0017] <3>The method for manufacturing a power storage device according to the third aspect is manufacturing the current collector with an electrode, wherein the current collector is the web-shaped current collector, by the method for manufacturing a current collector with an electrode according to <1> or <2> above; after the implementation of manufacturing the current collector with an electrode, cutting the web-shaped current collector to produce a bipolar electrode in which the positive electrode layer is formed on a part of the first main surface of the sheet-shaped current collector and the negative electrode layer is formed on a part of the second main surface opposite to the first main surface; welding at least a part of a sealing frame member to the uncoated portion where the positive electrode layer and the negative electrode layer of the bipolar electrode are not formed to produce a bipolar electrode with a sealing frame member; and has the plurality of through holes includes a first through hole, the method for manufacturing a power storage device, wherein the sealing frame member has a fitting portion that fits into the first through hole.

[0018] In the third aspect, the sealing frame member has a fitting portion that fits into the first through hole. As a result, the sealing frame member can be disposed at a desired position of the single-leaf shaped current collector more reliably than in the configuration where the sealing frame member does not have the fitting portion. Therefore, the sealing frame member can surely block a plurality of through holes of the single-leaf shaped current collector. As a result, the method for manufacturing a power storage device according to the third aspect can manufacture a power storage device in which the occurrence of a short circuit due to a non-aqueous electrolyte between adjacent unit cells is suppressed. A "unit cell" includes a positive electrode layer, a negative electrode layer, a separator, and a non-aqueous electrolyte.

[0019] <4>The method for manufacturing a power storage device according to the fourth aspect is laminating the bipolar electrodes with the sealing frame member to produce a laminate having a liquid injection port communicating with a region between the adjacent bipolar electrodes; injecting a non-aqueous electrolyte into the liquid injection port and injecting the non-aqueous electrolyte into the region through the through hole; The method for manufacturing a power storage device according to <3>, which includes

[0020] In the fourth aspect, a non-aqueous electrolyte is injected into the liquid injection port, and the non-aqueous electrolyte is injected into the region through the through hole. As a result, the time for filling the non-aqueous electrolyte into the region between adjacent bipolar electrodes is shortened. As a result, the method for manufacturing a power storage device according to the fourth aspect can manufacture a power storage device efficiently.

[0021] <5>The power storage device according to the fifth aspect is an electrode laminate including a plurality of bipolar electrodes laminated via a separator; a sealing frame that forms a region between adjacent bipolar electrodes among the plurality of bipolar electrodes; a non-aqueous electrolyte accommodated in the region; and includes The bipolar electrode includes a single-leaf shaped current collector, a positive electrode layer formed on a part of the first main surface of the single-leaf shaped current collector, and a negative electrode layer formed on a part of the second main surface of the single-leaf shaped current collector opposite to the first main surface. The tabular current collector has uncoated portions at the peripheries of the first main surface and the second main surface where the positive electrode layer and the negative electrode layer are not formed and to which the sealing frame is welded. The sealing frame has a liquid injection port communicating with the region. The tabular current collector is a power storage device including a plurality of through holes in the uncoated portion.

[0022] The power storage device according to the fifth aspect can be manufactured by the method for manufacturing the power storage device according to the third aspect or the fourth aspect. Therefore, the uncoated portion of the tabular current collector does not have a thermal history at a high temperature (for example, 200°C or higher). That is, the surface of the uncoated portion of the tabular current collector is not oxidized. Thereby, the adhesiveness between the uncoated portion of the tabular current collector and the sealing frame is excellent. Further, the conductivity of the uncoated portion of the tabular current collector is superior to that of a configuration in which the surface of the uncoated portion is oxidized. As a result, the power storage device according to the fifth aspect is excellent in sealing performance and charge / discharge characteristics. Furthermore, in the fifth aspect, the tabular current collector includes a plurality of through holes in the uncoated portion. Thereby, when injecting the non-aqueous electrolyte, injection can be performed through the through holes. As a result, in the manufacturing process of the power storage device according to the fifth aspect, the injection of the non-aqueous electrolyte is completed quickly.

[0023] <6>The power storage device according to the sixth aspect is wherein the plurality of through holes include at least one first through hole, the sealing frame has a sealing frame member welded to at least one of the first main surface and the second main surface of the tabular current collector of each of the plurality of bipolar electrodes at the uncoated portion, and the sealing frame member has a fitting portion fitted into the first through hole, and is the power storage device according to <5>.

[0024] In the sixth aspect, the sealing frame member has a fitting portion that fits into the first through hole. Therefore, the sealing frame member can be disposed at a desired position of the single-sheet current collector more than in the configuration where the sealing frame member does not have a fitting portion that fits into the first through hole. Therefore, the sealing frame member can surely block a plurality of through holes of the single-sheet current collector. As a result, in the power storage device of the sixth aspect, the occurrence of a short circuit due to the non-aqueous electrolyte between adjacent unit cells is suppressed.

[0025] <7>The manufacturing method of the power storage device of the seventh aspect is wherein the plurality of through holes include at least two of the first through holes and at least one second through hole having a diameter smaller than the diameter of the first through hole and into which the fitting portion is not inserted, and is the power storage device according to <6> above.

[0026] In the seventh aspect, the plurality of through holes have at least two first through holes. Therefore, the sealing frame member can be disposed at a desired position of the single-sheet current collector more than in the configuration where the sealing frame member has one through hole. Therefore, the sealing frame member can more surely block a plurality of through holes of the single-sheet current collector. As a result, in the power storage device of the seventh aspect, the occurrence of a short circuit due to the non-aqueous electrolyte between adjacent unit cells is suppressed.

Effect of the Invention

[0027] According to one embodiment of the present disclosure, there are provided a method for manufacturing an electrode-attached current collector and a method for manufacturing a power storage device that can efficiently dry the coating film of the composite slurry while suppressing excessive temperature rise of the uncoated portion of the current collector. According to another embodiment of the present disclosure, there is provided a power storage device having excellent sealing properties and charge / discharge characteristics.

Brief Description of the Drawings

[0028]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

DETAILED DESCRIPTION OF THE INVENTION

[0029] In the present disclosure, a numerical range indicated by "~" means a range including the numerical values described before and after "~" as the minimum value and the maximum value, respectively. In the numerical ranges described step by step in the present disclosure, the upper limit value or the lower limit value described in a certain numerical range may be replaced with the upper limit value or the lower limit value of the numerical range described in other step-by-step descriptions. In the present disclosure, a combination of two or more preferred embodiments is a more preferred embodiment. In the present disclosure, the term "step" includes not only an independent step but also a step that cannot be clearly distinguished from other steps, as long as the intended purpose of the step is achieved.

[0030] Hereinafter, with reference to the drawings, a method for manufacturing a power storage device and a power storage device according to an embodiment of the present disclosure will be described. In the drawings, the same or corresponding parts are denoted by the same reference numerals and the description will not be repeated.

[0031] (1) Method for manufacturing a power storage device The method for manufacturing a power storage device of the present disclosure is a method for manufacturing a power storage device 1. The method for manufacturing a power storage device of the present disclosure includes a step of manufacturing a current collector with electrodes, a cutting step, a first electrode manufacturing step, a second electrode manufacturing step, a first terminal electrode manufacturing step, a second terminal electrode manufacturing step, a laminate manufacturing step, a temporary fixing body manufacturing step, a pressure reduction step, a liquid injection step, and a welding step.

[0032] The current collector manufacturing process with electrodes, the cutting process, the first electrode manufacturing process, the second electrode manufacturing process, the laminate manufacturing process, the temporary fixing body manufacturing process, the depressurization process, the liquid injection process, and the welding process are carried out in this order. The first terminal electrode manufacturing process and the second terminal electrode manufacturing process are carried out before the laminate manufacturing process is carried out.

[0033] In this embodiment, a reel-to-reel apparatus is used in the current collector manufacturing process with electrodes.

[0034] (1.1) Energy storage device As shown in FIG. 1, the energy storage device 1 is a rectangular parallelepiped. The energy storage device 1 includes an electrode laminate 10, a sealing frame 20, and a non-aqueous electrolyte (not shown). The sealing frame 20 seals the side peripheral surface of the electrode laminate 10. The energy storage device 1 is sealed with an exterior body (not shown) of a known laminate film that blocks moisture.

[0035] In this embodiment, the longitudinal direction of the main surface of the energy storage device 1 is defined as the X-axis direction. The short-side direction of the main surface of the energy storage device 1 is defined as the Y-axis direction. The thickness direction of the energy storage device 1 is defined as the Z-axis direction. Each of the X-axis, Y-axis, and Z-axis is perpendicular to each other. The negative Z-axis direction and the gravitational direction are parallel. These directions do not limit the direction of use of the energy storage device of the present disclosure.

[0036] Each of the length L1 (see FIG. 1) in the X-axis direction and the length L2 (see FIG. 1) in the Y-axis direction of the energy storage device 1 may exceed 1 m.

[0037] (1.1.1) Electrode laminate The electrode laminate 10 is a rectangular parallelepiped. The electrode laminate 10 includes a plurality of bipolar electrodes 11 laminated in the Z-axis direction via separators 12. Specifically, as shown in FIG. 2, the electrode laminate 10 has a plurality of bipolar electrodes 11, a plurality of separators 12, a positive electrode layer side terminal electrode 13, and a negative electrode layer side terminal electrode 14. The plurality of bipolar electrodes 11 and the plurality of separators 12 are alternately laminated along the Z-axis direction. The positive electrode layer side terminal electrode 13 is laminated via a separator 12 on the bipolar electrode 11 that is located most on one side (the positive direction side of the Z-axis direction) in the stacking direction among the plurality of bipolar electrodes 11. The negative electrode layer side terminal electrode 14 is laminated via a separator 12 on the bipolar electrode 11 that is located most on the other side (the negative direction side of the Z-axis direction) in the stacking direction among the plurality of bipolar electrodes 11.

[0038] (1.1.1.1) Bipolar electrode The bipolar electrode 11 has a leaf-shaped current collector 110A (hereinafter also referred to as "current collector 110A"), a positive electrode layer 111A, and a negative electrode layer 112A. The positive electrode layer 111A is formed on a part of the second main surface S110B of the current collector 110A. The negative electrode layer 112A is formed on a part of the first main surface S110A of the current collector 110A. The bipolar electrode 11 may have a known configuration.

[0039] The current collector 110A supplies current to the positive electrode layer 111A and the negative electrode layer 112A during discharge or charging of the power storage device 1. Examples of the material of the current collector 110A include metal foil, conductive resin material, or conductive inorganic material. Examples of the metal foil include aluminum foil, copper foil, nickel foil, titanium foil, stainless steel foil, etc. Examples of the conductive resin material include a resin obtained by adding a conductive filler to a conductive polymer material or a non-conductive polymer material as necessary. A coating layer may be formed on the surface of the current collector 110A. The coating layer may be formed by a known method (for example, plating treatment, spray coating, etc.). The thickness of the current collector 110A may be 1 μm to 100 μm. As shown in FIG. 3, the current collector 110A has a pair of first sides X110 extending in the X-axis direction and a pair of second sides Y110 extending in the Y-axis direction in a plan view. That is, the current collector 110A is rectangular in a plan view. As shown in FIG. 3, the current collector 110A has an uncoated portion R110 at the periphery of the first main surface S110A and the second main surface S110B. The positive electrode layer 111A and the negative electrode layer 112A are not formed on the uncoated portion R110. The sealing frame 20 is welded to the uncoated portion R110 in the power storage device 1. The current collector 110A includes a plurality of through holes H in the uncoated portion R110. In the present embodiment, the shape of the through hole H is circular. In the present embodiment, the plurality of through holes H are formed along the X-axis direction in the uncoated portions R110 on both sides in the Y-axis direction of the current collector 110A. In the present embodiment, the plurality of through holes H include six first through holes HA and forty second through holes HB. The second through hole HB has a diameter L4 (see FIG. 5) smaller than the diameter L3 (see FIG. 5) of the first through hole HA. The diameter L3 of the first through hole HA is, for example, 2 mm. The diameter L4 of the second through hole HB is, for example, less than 55 μm. The plurality of second through holes HB are arranged at equal intervals L5 (see FIG. 3) along the X-axis direction. The interval L5 between the second through holes HB is, for example, 5.7 mm or more.

[0040] The positive electrode layer 111A contains a positive electrode layer active material (for example, a lithium composite metal oxide having a layered rock salt structure, a metal oxide having a spinel structure, a polyanion-based compound, etc.) capable of occluding and releasing charge carriers. The thickness (length in the Z-axis direction) of the positive electrode layer 111A may be 2 μm to 500 μm.

[0041] The negative electrode layer 112A contains a negative electrode layer active material (for example, carbon, a compound capable of alloying with lithium, etc.) that can occlude and release charge carriers. Examples of carbon include natural graphite, artificial graphite, hard carbon (non-graphitizable carbon), or soft carbon (graphitizable carbon). Examples of artificial graphite include highly oriented graphite, mesocarbon microbeads, etc. Examples of elements capable of alloying with lithium include silicon or tin. The thickness (length in the Z-axis direction) of the negative electrode layer 112A may be 2 μm to 500 μm. The thickness of the negative electrode layer 112A may be the same as or different from the thickness of the positive electrode layer 111A.

[0042] Each of the positive electrode layer 111A and the negative electrode layer 112A may further contain a conductive auxiliary agent for enhancing electron conductivity, a binder, an electrolyte supporting salt (lithium salt) for enhancing ion conductivity, a polymer electrolyte, an additive (for example, trifluoropropylene carbonate, a filler as a reinforcing material, etc.) as needed. Examples of the conductive auxiliary agent include carbon nanofibers, acetylene black, carbon black, or graphite. Examples of the binder include fluorine-containing resins (polyvinylidene fluoride, polytetrafluoroethylene, fluororubber, etc.), thermoplastic resins (for example, polypropylene, polyethylene, etc.), imide-based resins (for example, polyimide, polyamideimide, etc.), alkoxysilyl group-containing resins, acrylic resins (for example, acrylic acid or methacrylic acid, etc.), styrene-butadiene rubber (SBR), carboxymethyl cellulose, alginates (for example, sodium alginate or ammonium alginate, etc.), water-soluble cellulose ester cross-linked bodies, starch-acrylic acid graft polymers, etc. These binders can be used alone or in combination.

[0043] (1.1.1.2) Separator Separator 12 maintains the distance between the positive electrode layer 111A and the negative electrode layer 112A to prevent the occurrence of a short circuit due to contact, and allows charge carriers such as lithium ions (for example, lithium ions, etc.) to pass through. The periphery of the separator 12 is welded to the sealing frame 20. The separator 12 is held by the sealing frame 20. Examples of the separator 12 include a porous resin sheet or a non-woven fabric. Examples of the material of the porous resin sheet include polyolefin (such as polypropylene, polyethylene, etc.) or polyester. Examples of the material of the non-woven fabric include polypropylene, polyethylene terephthalate, or methyl cellulose. The separator 12 may have a known configuration.

[0044] (1.1.1.3) Positive electrode layer side terminal electrode The positive electrode layer side terminal electrode 13 has a current collector 110A and a positive electrode layer 111A. The positive electrode layer 111A is formed on the second main surface S110B of the current collector 110A. The positive electrode layer side terminal electrode 13 may have a known configuration.

[0045] (1.1.1.4) Negative electrode layer side terminal electrode The negative electrode layer side terminal electrode 14 has a current collector 110A and a negative electrode layer 112A. The negative electrode layer 112A is formed on the first main surface S110A of the current collector 110A. The negative electrode layer side terminal electrode 14 may have a known configuration.

[0046] (1.1.2) Sealing frame The sealing frame 20 forms a region T between adjacent bipolar electrodes 11 among the plurality of bipolar electrodes 11. In the region T, the positive electrode layer 111A, the negative electrode layer 112A, and the separator 12 are accommodated in a state of being contained in the non-aqueous electrolyte. The sealing frame 20 prevents the non-aqueous electrolyte accommodated in the region T from leaking to the outside. The sealing frame 20 can prevent moisture from entering the region T from the outside of the power storage device 1. The sealing frame 20 has a liquid injection port (not shown). The liquid injection port communicates with the region T.

[0047] The sealing frame 20 is a rectangular square tube in cross-section. The sealing frame 20 has a plurality of sealing frame members 21. Among the plurality of sealing frame members 21, adjacent sealing frame members 21 are in direct contact. At least a part of the interface between adjacent sealing frame members 21 is welded.

[0048] (1.1.2.1) Sealing frame member The sealing frame member 21 is a rectangular square tube in cross-section. In the present embodiment, the sealing frame member 21 is welded to the non-coated portions R110 of the first main surface S110A and the second main surface S110B of the current collector 110A of each of the plurality of bipolar electrodes 11. The sealing frame member 21 is welded to a plurality of through holes H. That is, the plurality of through holes H are blocked by the sealing frame member 21 so that the non-aqueous electrolyte does not flow in the plurality of through holes H.

[0049] FIG. 4 is a front view of the bipolar electrode 33 with a sealing frame member. The bipolar electrode 33 with a sealing frame member is a component of the power storage device 1 as described later. The bipolar electrode 33 with a sealing frame member has a bipolar electrode 11 and a sealing frame member 21. The sealing frame member 21 is welded to the non-coated portions R110 of the first main surface S110A and the second main surface S110B of the current collector 110A of the bipolar electrode 11. FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 4.

[0050] As shown in FIG. 5, the sealing frame member 21 has a first sealing frame member component 211 and a second sealing frame member component 212. The first sealing frame member component 211 and the second sealing frame member component 212 are welded. The first sealing frame member component 211 has a flat plate-like main body 2111 and a peripheral wall portion 2112. The peripheral wall portion 2112 is located at the periphery of the flat plate-like main body 2111. The peripheral wall portion 2112 protrudes from the flat plate-like main body 2111 in the negative Z-axis direction. The second sealing frame member component 212 has a flat plate-shaped main body 2121 and six second fitting portions 2122. Each of the six second fitting portions 2122 is located at a position corresponding to each of the six first through holes HA. The second fitting portion 2122 protrudes in the positive Z-axis direction from the flat plate-shaped main body 2121. Each of the six second fitting portions 2122 is fitted into the corresponding first through hole HA. The second sealing frame member component 212 does not fit with all of the plurality of second through holes HB. The shape of the second fitting portion 2122 is, for example, cylindrical. The diameter L6 (see FIG. 5) of the second fitting portion 2122 is, for example, 1 mm.

[0051] Examples of the material of the sealing frame member 21 include polyethylene, polystyrene, acrylonitrile-butadiene-styrene copolymer synthetic resin (ABS resin), modified polypropylene, acrylonitrile styrene resin, and the like.

[0052] (1.1.3) Non-aqueous electrolyte The non-aqueous electrolyte is accommodated in the region T. The non-aqueous electrolyte may contain a non-aqueous solvent and a lithium salt. Examples of the lithium salt include LiClO4, LiAsF6, LiPF6, LiBF4, LiCF3SO3, LiN(FSO2)2, LiN(CF3SO2)2, and the like. Examples of the non-aqueous solvent include cyclic carbonates, cyclic esters, chain carbonates, chain esters, ethers, and the like. The non-aqueous electrolyte may contain additives (for example, lithium bis(oxalato)borate, etc.).

[0053] (1.1.4) Use The applications of the power storage device 1 can be used as power sources for, for example, electric four-wheel vehicles, electric two-wheel vehicles, portable devices, power storage systems, etc. Examples of electric four-wheel vehicles include battery electric vehicles (BEV), plug-in hybrid electric vehicles (PHEV), and hybrid electric vehicles (HEV). Electric two-wheel vehicles include electric motorcycles or electric assist bicycles. Portable devices include, for example, smartphones, tablet computers, notebook computers, power tools, video cameras, etc. Power storage systems include home power storage systems, industrial power storage systems, energy storage systems (ESS), etc.

[0054] (1.2) Process for manufacturing a current collector with electrodes In the process for manufacturing a current collector with electrodes, a current collector with electrodes is manufactured. The current collector with electrodes is formed by forming a positive electrode layer 111A on a part of the first main surface S100A of a web-shaped current collector 110B (hereinafter also referred to as "current collector 110B") including a plurality of through holes H, and forming a negative electrode layer 112A on a part of the second main surface S110B.

[0055] Specifically, the process for manufacturing a current collector with electrodes includes a first coating step, a first drying step, a second coating step, and a second drying step. The first coating step, the first drying step, the second coating step, and the second drying step are carried out in this order.

[0056] (1.2.1) First coating step In the first coating step, a positive electrode composite slurry is intermittently applied to the current collector 110B to produce a current collector with a first coated material 31. The current collector with a first coated material 31 includes the current collector 110B and coatings 111B of a plurality of positive electrode composite slurries. The coatings 111B of the plurality of positive electrode composite slurries are intermittently arranged along the longitudinal direction of the current collector 110B on the second main surface S110B of the current collector 110B. The positive electrode composite slurry is an example of a composite slurry.

[0057] The web-shaped current collector 110B has the same configuration as the sheet-shaped current collector 110A, except that it is not cut into sheets.

[0058] The positive electrode composite material slurry contains a constituent material of the positive electrode layer 111A and a solvent. The solvent may be a known aqueous solvent or a known organic solvent. Examples of the aqueous solvent include water, a mixture of water and alcohol (e.g., ethyl alcohol, methyl alcohol, isopropyl alcohol, etc.), and the like. Examples of the organic solvent include N-methyl-2-pyrrolidone, dimethylformamide, dimethylacetamide, methylformamide, cyclohexane, hexane, and the like. The solvent may be any known solvent.

[0059] The coating method is not particularly limited and may be any known method. Examples of the coating method include a screen printing method, an electrostatic spray coating method, an inkjet method, a doctor blade method, spray coating, a flow coating method, and the like. The positive electrode composite material slurry may be applied to the conveyed current collector 110B to continuously form a plurality of coatings 111B of the positive electrode composite material slurry on the second main surface S110B of the current collector 110B.

[0060] The method for forming the plurality of through holes H in the current collector 110B is not particularly limited and may be any known method. Examples of the method for forming the plurality of through holes H include laser processing, end mill processing, punching, etching, and the like.

[0061] (1.2.2) First drying step In the first drying step, the coating 111B of the current collector 31 with the first coating is irradiated with laser light G, and at the same time, cooling air F is blown into the plurality of through holes H to form the positive electrode layer 111A, which is a dried product of the coating 111B, to produce a current collector with a positive electrode. The current collector with a positive electrode has the current collector 110B and a plurality of positive electrode layers 111A. The plurality of positive electrode layers 111A are intermittently arranged along the longitudinal direction of the current collector 110B on the second main surface S110B of the current collector 110B. The current collector with a positive electrode is an example of a current collector with an electrode.

[0062] In this embodiment, the first drying step is carried out in a drying furnace 80 shown in FIG. 6. The drying furnace 80 includes a laser light source 81, a plurality of air supply parts 82, a plurality of exhaust parts 83, a plurality of flow rectifying plates 84, and a conveying device (not shown). The laser light source 81, the plurality of air supply parts 82, and the plurality of flow rectifying plates 84 are arranged on the second main surface S110B side (coating 111B side) of the current collector 110B. The plurality of exhaust parts 83 are arranged on the first main surface S110A side of the current collector 110B.

[0063] The laser light source 81 irradiates the coating 111B of the current collector 31 with the coating 111B with laser light G. From the viewpoint of efficiently drying the coating 111B, the irradiation amount of the laser light G is preferably adjusted so that the temperature of the part where the coating 111B of the current collector 110B is formed (hereinafter, also referred to as "coated part") becomes 180°C or higher. From the viewpoint of suppressing excessive temperature rise of the uncoated part, the temperature of the coated part during irradiation of the laser light G is preferably 220°C or lower. The wavelength of the laser light G is not particularly limited and is appropriately selected according to the material of the positive electrode composite slurry and the like. The laser light source 81 may be a known laser light source. Examples of the laser light source 81 include a gas laser (for example, an excimer laser and a CO2 laser, etc.), a solid laser (for example, a Nd:YAG laser, etc.), and a semiconductor laser.

[0064] The air supply part 82 blows the cooling air F into the plurality of through holes H of the current collector 110B. The temperature and wind speed of the cooling air F are appropriately selected according to the irradiation amount of the laser light G and the like, and are preferably adjusted so that the temperature of the uncoated part of the current collector 110B during irradiation of the laser light G becomes 160°C or lower. From the viewpoint of preventing the occurrence of deterioration (for example, surface oxidation, etc.) of the uncoated part, the temperature of the uncoated part of the current collector 110B during irradiation of the laser light G is more preferably 120°C or lower. The temperature of the uncoated part of the current collector 110B during irradiation of the laser light G may be 80°C or higher. The temperature of the cooling air F may be normal temperature (23°C). The air supply part 82 may have a known configuration.

[0065] The exhaust part 83 discharges the cooling air F that has passed through the through-hole H to the outside of the drying furnace 80. Thereby, the vapor (for example, the solvent of the positive electrode composite material slurry) inside the drying furnace 80 can be discharged to the outside of the drying furnace 80. Therefore, the temperature of the uncoated part of the current collector 110B during the irradiation of the laser light G can be efficiently cooled by the laser light G. The exhaust part 83 may have a known configuration.

[0066] The plurality of rectifying plates 84 guide the cooling air F supplied from the air supply part 82 to the plurality of through-holes H of the current collector 110B. Thereby, the temperature of the uncoated part of the current collector 110B during the irradiation of the laser light G can be efficiently cooled by the laser light G. The rectifying plate 84 may have a known configuration.

[0067] The conveying device conveys the current collector 31 with the first coating. The conveying speed of the current collector 31 with the first coating is appropriately adjusted according to the size of the current collector 31 with the first coating, the type of the laser light source 81, etc. The conveying speed is, for example, 34 m / min. The conveying device may have a known configuration.

[0068] (1.2.3) Second coating process In the second coating process, the negative electrode composite material slurry is intermittently applied to the current collector with the positive electrode to produce the current collector 32 with the second coating. The current collector 32 with the second coating has the current collector 110B, a plurality of positive electrode layers 111A, and a plurality of coatings 112B of the negative electrode composite material slurry. The plurality of positive electrode layers 111A are formed on the second main surface S110B of the current collector 110B. The plurality of coatings 112B of the negative electrode composite material slurry are formed on the first main surface S110A of the current collector 110B. The plurality of coatings 112B of the negative electrode composite material slurry are arranged so as to face the plurality of positive electrode layers 111A through the current collector 110B. The negative electrode composite material slurry is an example of the composite material slurry.

[0069] The negative electrode composite material slurry contains the constituent material of the negative electrode layer 112A and a solvent. Examples of the solvent include the same ones as those exemplified as the solvent in the first coating process. The solvent may be a known solvent.

[0070] The coating method is not particularly limited, and examples thereof include the same methods as those exemplified as the coating method in the first coating step. The negative electrode composite material slurry may be applied to the current collector with the positive electrode being conveyed, and a plurality of coated objects 112B of the negative electrode composite material slurry may be continuously formed on the first main surface S110A of the current collector 110B.

[0071] (1.2.4) Second drying step In the second drying step, the coated object 112B of the coated object of the current collector 32 with the second coating is irradiated with laser light G, and at the same time, cooling air F is blown into a plurality of through holes H to form a negative electrode layer 112A which is a dried product of the coated object 112B, thereby producing a current collector with bipolar electrodes. The current collector with bipolar electrodes has a current collector 110B, a plurality of positive electrode layers 111A, and a plurality of negative electrode layers 112A. The plurality of positive electrode layers 111A are formed on the second main surface S110B of the current collector 110B. The plurality of negative electrode layers 112A are formed on the first main surface S110A of the current collector 110B. The plurality of negative electrode layers 112A are arranged so as to face the plurality of positive electrode layers 111A with the current collector 110B interposed therebetween.

[0072] In the present embodiment, the second drying step is carried out in a drying furnace 80 shown in FIG. 7. The drying furnace 80 in the second drying step has the same configuration as the drying furnace 80 in the first drying step.

[0073] (1.3) Cutting step In the cutting step, the web-shaped current collector 110B of the current collector with bipolar electrodes is cut to produce a bipolar electrode 11. The bipolar electrode 11 is formed such that a positive electrode layer 111A is formed on a part of the first main surface S100A of the current collector 110A, and a negative electrode layer 112A is formed on a part of the second main surface S110B of the current collector 110A. The cutting method of the web-shaped current collector 110B is not particularly limited, and any known method may be used.

[0074] (1.4) First electrode manufacturing step In the first electrode manufacturing process, a part of the sealing frame member 21 is welded to the current collector 110A of the bipolar electrode 11 to fabricate a bipolar electrode 33 with a sealing frame member (see FIG. 2). The sealing frame member 21 of the bipolar electrode 33 with a sealing frame member is not welded to a plurality of through holes H in the current collector 110A. That is, the plurality of through holes H in the current collector 110A are not completely blocked by the sealing frame member 21. The welding method is not particularly limited as long as it is a known method.

[0075] (1.5) Second electrode manufacturing process In the second electrode manufacturing process, a separator 12 is welded to the sealing frame member 21 of the bipolar electrode 33 with a sealing frame member to fabricate a bipolar electrode 34 with a separator (see FIG. 2). The welding method is not particularly limited as long as it is a known method.

[0076] (1.6) First terminal electrode manufacturing process In the first terminal electrode manufacturing process, a terminal electrode 35 with a sealing frame member (see FIG. 2) is fabricated. The terminal electrode 35 with a sealing frame member has a positive electrode layer side terminal electrode 13 and a sealing frame member 21. A part of the sealing frame member 21 is welded to the current collector 110A of the positive electrode layer side terminal electrode 13. The sealing frame member 21 is not welded to a plurality of through holes H in the current collector 110A. That is, the plurality of through holes H in the current collector 110A are not completely blocked by the sealing frame member 21. The manufacturing method of the terminal electrode 35 with a sealing frame member is not particularly limited, and examples include a method according to the manufacturing method of the bipolar electrode 33 with a sealing frame member (see FIG. 2).

[0077] (1.7) Second terminal electrode manufacturing process In the second terminal electrode manufacturing process, a terminal electrode 36 with a separator (see FIG. 2) is manufactured. The terminal electrode 36 with a separator includes a negative electrode layer side terminal electrode 14, a sealing frame member 21, and a separator 12. A part of the sealing frame member 21 is welded to the current collector 110A of the negative electrode layer side terminal electrode 14. The sealing frame member 21 is not welded to a plurality of through holes H in the current collector 110A. That is, the plurality of through holes H in the current collector 110A are not completely blocked by the sealing frame member 21. The manufacturing method of the terminal electrode 36 with a separator is not particularly limited, and examples include a method according to the manufacturing method of the bipolar electrode 34 with a separator (see FIG. 2).

[0078] (1.8) Stacked body manufacturing process In the stacked body manufacturing process, a plurality of bipolar electrodes 34 with separators are stacked to manufacture a stacked body having a liquid injection port (not shown) communicating with the region T. Specifically, a plurality of bipolar electrodes 34 with separators are stacked on the terminal electrode 36 with a separator, and finally, a terminal electrode 35 with a sealing frame member is stacked to manufacture a stacked body. The stacked body has the same configuration as the power storage device 1 except that it does not include a non-aqueous electrolyte, a plurality of sealing frame members 21 are not integrated, and the sealing frame member 21 is not welded to a plurality of through holes H in the current collector 110A. The stacking method is not particularly limited and may be any known method.

[0079] (1.9) Temporary fixing body manufacturing process In the temporary fixing body manufacturing process, a plurality of sealing frame members 21 of the stacked body are heated. Hereinafter, the heated stacked body is also referred to as a "temporary fixing body". In the temporary fixing body, adjacent sealing frame members 21 among the plurality of sealing frame members 21 are welded. That is, the plurality of sealing frame members 21 are integrated. The temporary fixing body has the same configuration as the power storage device 1 except that it does not include a non-aqueous electrolyte and the sealing frame member 21 is not welded to a plurality of through holes H in the current collector 110A. The heating method of the sealing frame member 21 is not particularly limited and may be any known method, and examples include laser heating, infrared (IR) heating, microwave heating, induction heating, hot air heating, hot plate heating, or heating rolls.

[0080] (1.10) Pressure reduction process In the depressurization step, the pressure in a plurality of regions T of the temporary fixing body is reduced. As a result, the air in the region T is discharged to the outside of the temporary fixing body. As a result, the non-aqueous electrolyte is easily injected into the region T. Any known method may be used to reduce the pressure in the region T.

[0081] (1.11) Electrolyte injection step In the electrolyte injection step, a non-aqueous electrolyte is injected into the region T of the temporary fixing body, and the non-aqueous electrolyte is injected into the region T via the through holes H. As a result, a temporary fixing body containing a non-aqueous electrolyte is obtained. In the temporary fixing body containing a non-aqueous electrolyte, the sealing frame member 21 is not welded to the plurality of through holes H of the current collector 110A. That is, each of the plurality of regions T communicates via the plurality of through holes H. Therefore, when the non-aqueous electrolyte is injected into the injection port of the temporary fixing body, the non-aqueous electrolyte can move into the region T through the through holes H. The temporary fixing body containing a non-aqueous electrolyte has the same configuration as the power storage device 1 except that the sealing frame member 21 is not welded to the plurality of through holes H of the current collector 110A. Any known method may be used to inject the non-aqueous electrolyte.

[0082] (1.12) Welding step In the welding step, a plurality of sealing frame members 21 of the temporary fixing body containing a non-aqueous electrolyte are heated to form a sealing frame 20 in which the sealing frame members 21 are welded to the plurality of through holes H. As a result, the power storage device 1 is obtained. The method for heating the sealing frame member 21 is not particularly limited, and any known method may be used, for example, laser heating, infrared (IR) heating, microwave heating, induction heating, hot air heating, hot plate heating, or heating roll.

[0083] (1.3) Operational effects As described with reference to FIGS. 1 to 7, the method for manufacturing a current collector with an electrode according to the present embodiment includes a first coating step, a first drying step, a second coating step, and a second drying step. The laser beam G can be irradiated not only onto the coatings 111B and 112B but also onto the uncoated portion R110 of the current collector 110B. When the uncoated portion R110 of the current collector 110B is irradiated with the laser beam G, the uncoated portion R110 of the current collector 110B may be excessively heated. The temperature of the uncoated portion R110 that has been excessively heated is, for example, 200°C or higher. In the present embodiment, while irradiating the coatings 111B and 112B with the laser beam G, cooling air F is blown into the plurality of through holes H. Thereby, even when the uncoated portion R110 of the current collector 110A is irradiated with the laser beam G, the uncoated portion R110 of the current collector 110B can be efficiently cooled while circulating the cooling air F passing through the through holes H. Therefore, the uncoated portion R110 of the current collector 110B is less likely to be excessively heated. As a result, the method for manufacturing the current collector with electrodes of the present embodiment can efficiently dry the coatings 111B and 112B while suppressing excessive temperature rise of the uncoated portion R110 of the current collector 110B.

[0084] As described with reference to FIGS. 1 to 7, in the present embodiment, the laser beam G is used as the heating light. The directivity of the laser beam G is higher than the directivity of the infrared light supplied from the infrared lamp. Therefore, the laser beam G is less likely to be irradiated onto the uncoated portion R110 of the current collector 110B than the infrared light supplied from the infrared lamp. As a result, the method for manufacturing the current collector with electrodes of the present embodiment can further suppress excessive temperature rise of the uncoated portion R110 of the current collector 110B.

[0085] As described with reference to FIGS. 1 to 7, the method for manufacturing the power storage device of the present embodiment includes a step of manufacturing a current collector with electrodes, a cutting step, and a first electrode manufacturing step. The plurality of through holes H includes six first through holes HA. The sealing frame member 21 has six fitting portions 2122 that fit into the first through holes HA. As a result, the sealing frame member 21 can be disposed at a desired position of the current collector 110A rather than in a configuration where the sealing frame member 21 has less than two fitting portions 2122. Therefore, the sealing frame member 21 can surely block a plurality of through holes H of the current collector 110A. As a result, the manufacturing method of the power storage device of the present embodiment can manufacture the power storage device 1 in which the occurrence of a short circuit due to the non-aqueous electrolyte between adjacent unit cells is suppressed. A "unit cell" includes a positive electrode layer 111A, a negative electrode layer 112A, a separator 12, and a non-aqueous electrolyte.

[0086] As described with reference to FIGS. 1 to 7, the manufacturing method of the power storage device of the present embodiment includes a laminate manufacturing step and an electrolyte injection step. In the present embodiment, the sealing frame member 21 of the temporary fixing body is not welded to the plurality of through holes H. That is, each of the plurality of regions T communicates with the plurality of through holes H. Therefore, when the non-aqueous electrolyte is injected into the injection port of the temporary fixing body, the non-aqueous electrolyte can move into the region T through the through holes H. As a result, the time for filling the non-aqueous electrolyte into the region T is shorter than in a configuration where the sealing frame member 21 is welded to the plurality of through holes H (that is, a configuration where the sealing frame member 21 surely blocks the plurality of through holes H). As a result, the manufacturing method of the power storage device of the present embodiment can efficiently manufacture the power storage device 1.

[0087] As described with reference to FIGS. 1 to 7, the power storage device 1 includes an electrode laminate 10, a sealing frame 20, and a non-aqueous electrolyte. The bipolar electrode 11 includes a current collector 110A, a positive electrode layer 111A, and a negative electrode layer 112A. The current collector 110A has an uncoated portion R110. The sealing frame 20 has an injection port communicating with the region T. The current collector 110A includes a plurality of through holes H in the uncoated portion R110. The power storage device 1 can be manufactured by the method for manufacturing a power storage device of the present embodiment. Therefore, the uncoated portion R110 of the current collector 110A does not have a thermal history at a high temperature (for example, 200°C or higher). That is, the surface of the uncoated portion R110 of the current collector 110A is not oxidized. As a result, the adhesiveness between the uncoated portion R110 of the current collector 110A and the sealing frame 20 is excellent. Further, the conductivity of the uncoated portion R110 of the current collector 110A is superior to that of a configuration in which the surface of the uncoated portion R110 is oxidized. As a result, the power storage device 1 is excellent in sealing performance and charge / discharge characteristics. Furthermore, when injecting the non-aqueous electrolyte, it is possible to inject the electrolyte through the through-hole H. As a result, in the manufacturing process of the power storage device 1, the injection of the non-aqueous electrolyte is completed quickly.

[0088] As described with reference to FIGS. 1 to 7, in the power storage device 1, the plurality of through-holes H include six first through-holes HA. The sealing frame 20 has a sealing frame member 21 welded to the uncoated portions R110 of the first main surface S110A and the second main surface S110B of each of the plurality of bipolar electrodes 11. The sealing frame 20 has a fitting portion 2122 that fits into the first through-hole HA. The sealing frame member 21 can be arranged at a desired position of the current collector 110A rather than a configuration in which the sealing frame member 21 does not have a fitting portion 2122 that fits into the first through-hole HA. Therefore, the sealing frame member 21 can surely block the plurality of through-holes H of the current collector 110A. As a result, in the power storage device 1, the occurrence of a short circuit due to the non-aqueous electrolyte between adjacent unit cells is suppressed.

[0089] As described with reference to FIGS. 1 to 7, the plurality of through-holes H include six first through-holes HA and forty second through-holes HB. The sealing frame member 21 can be arranged at a desired position of the current collector 110A rather than a configuration in which the sealing frame member 21 has one through-hole H. Therefore, the sealing frame member 21 can more surely block the plurality of through-holes H of the current collector 110A. As a result, in the power storage device 1, the occurrence of a short circuit due to the non-aqueous electrolyte between adjacent unit cells is suppressed.

[0090] (2) Modified Example In this embodiment, the heating light is laser light G, but the present disclosure is not limited thereto. The heating light may be, for example, lamp light or LED (Light Emitting Diode) light. "Lamp light" refers to the heating light emitted from a lamp light source. "LED light" refers to the heating light emitted from an LED light source.

[0091] In this embodiment, in the step of manufacturing the current collector with electrodes, the web-shaped current collector 110B is used as the current collector, but the present disclosure is not limited thereto. In the step of manufacturing the current collector with electrodes, the single-sheet current collector 110A may be used as the current collector. When the single-sheet current collector 110A is used as the current collector, the cutting step is not performed. In this embodiment, the sealing frame 20 has a plurality of sealing frame members 21, but the present disclosure is not limited thereto. The sealing frame 20 may not have a plurality of sealing frame members 21. In this embodiment, the plurality of through holes H includes six first through holes HA, but the present disclosure is not limited thereto. The plurality of through holes H may be two to five, seven or more, or even one. In this embodiment, the sealing frame member 21 has the same number of fitting portions 2122 as the number of the first through holes HA, but the present disclosure is not limited thereto. The sealing frame member 21 may have a number of fitting portions 2122 less than the number of the first through holes HA, or may not have the fitting portions 2122. In this embodiment, the first sealing frame member part 211 does not have a fitting portion that fits into the first through hole HA, but the present disclosure is not limited thereto. The first sealing frame member part 211 may have a fitting portion that fits into the first through hole HA.

[0092] In this embodiment, the sealing frame member 21 of the bipolar electrode 33 with a sealing frame member is not welded to the plurality of through holes H, but the present disclosure is not limited thereto. The sealing frame member 21 of the bipolar electrode 33 with a sealing frame member may be welded to the plurality of through holes H.

[0093] In this embodiment, the plurality of through holes H are formed along the X-axis direction in the uncoated portions R110 on both sides of the current collector 110A in the Y-axis direction. However, the present disclosure is not limited thereto. The plurality of through holes H may be formed along the X-axis direction in one uncoated portion R110 of the current collector 110A in the Y-axis direction.

[0094] In this embodiment, the shape of the through hole H is circular. However, the present disclosure is not limited thereto, and it may not be circular. The shape of the through hole H may be, for example, polygonal, irregular, or the like. In this embodiment, the first coating step, the first drying step, the second coating step, and the second drying step use a reel-to-reel apparatus. However, the present disclosure is not limited thereto, and a batch type may also be used.

Explanation of Reference Numerals

[0095] 1: Power storage device, 10: Electrode laminate, 11: Bipolar electrode, 110A: Sheet-like current collector, 110B: Web-like current collector, 111A: Positive electrode layer, 111B: Coated material, 112A: Negative electrode layer, 112B: Coated material, 12: Separator, 13: Positive electrode layer side terminal electrode, 14: Negative electrode layer side terminal electrode, 20: Sealing frame, 21: Sealing frame member, 211: First sealing frame member component, 212: Second sealing frame member component, 31: Current collector with first coated material, 32: Current collector with second coated material, 33: Bipolar electrode with sealing frame member, 34: Bipolar electrode with separator, 35: Terminal electrode with sealing frame member, 36: Terminal electrode with separator, 80: Drying furnace, 81: Laser light source, 82: Air supply section, 83: Exhaust section, 84: Rectifying plate, F: Cooling air, G: Laser light, H: Through hole, HA: First through hole, HB: Second through hole, J: Infrared ray, R110: Uncoated portion, T: Region

Claims

1. Applying a composite material slurry onto a current collector showing a single-sheet current collector having a plurality of through-holes or a web-shaped current collector having a plurality of through-holes to produce a current collector with a coating having at least one coating of the composite material slurry; While irradiating the coating of the current collector with the coating with heating light, blowing cooling air into the through-holes at the same time to form a positive electrode layer or a negative electrode layer which is a dried product of the coating, and producing a current collector with an electrode; A method for manufacturing a current collector with an electrode, comprising:

2. The method for manufacturing a current collector with an electrode according to Claim 1, wherein the heating light is laser light.

3. Producing the current collector with an electrode in which the current collector is the web-shaped current collector by the method for manufacturing a current collector with an electrode according to Claim 1 or Claim 2; After carrying out the production of the current collector with an electrode, cutting the web-shaped current collector to produce a bipolar electrode in which the positive electrode layer is formed on a part of the first main surface of the single-sheet current collector and the negative electrode layer is formed on a part of the second main surface opposite to the first main surface; Welding at least a part of a sealing frame member to an uncoated part where the positive electrode layer and the negative electrode layer of the bipolar electrode are not formed to produce a bipolar electrode with a sealing frame member; comprising: The plurality of through-holes includes a first through-hole; The sealing frame member has a fitting portion that fits into the first through-hole. A method for manufacturing a power storage device.

4. Stacking the bipolar electrodes with a sealing frame member to produce a laminate having a liquid injection port communicating with a region between adjacent bipolar electrodes; Injecting a non-aqueous electrolyte into the liquid injection port and injecting the non-aqueous electrolyte into the region through the through-holes; A method for manufacturing a power storage device according to Claim 3, comprising:

5. An electrode laminate including a plurality of bipolar electrodes stacked via a separator; A sealing frame forming a region between adjacent bipolar electrodes among the plurality of bipolar electrodes; A non-aqueous electrolyte accommodated in the region; comprising: The bipolar electrode includes a single-sheet current collector, a positive electrode layer formed on a part of the first main surface of the single-sheet current collector, and a negative electrode layer formed on a part of the second main surface opposite to the first main surface of the single-sheet current collector; The single-sheet current collector has an uncoated portion where the positive electrode layer and the negative electrode layer are not formed at the peripheries of the first main surface and the second main surface, and the sealing frame is welded; The sealing frame has a liquid injection port communicating with the region. A power storage device in which the leaf-shaped current collector includes a plurality of through-holes in the uncoated portion. **Claim 6** The plurality of through-holes include at least one first through-hole, the sealing frame has a sealing frame member welded to at least one of the first main surface and the second main surface of the leaf-shaped current collector of each of the plurality of bipolar electrodes in the uncoated portion, The power storage device according to claim 5, wherein the sealing frame member has a fitting portion fitted in the first through-hole. **Claim 7** The plurality of through-holes include at least two of the first through-holes, and at least one second through-hole having a diameter smaller than the diameter of the first through-hole and into which the fitting portion is not inserted, The power storage device according to claim 6, comprising:

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