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WO2017208509A1 - Dispositif de stockage d'énergie et son procédé de fabrication - Google Patents

Dispositif de stockage d'énergie et son procédé de fabrication Download PDF

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Publication number
WO2017208509A1
WO2017208509A1 PCT/JP2017/005428 JP2017005428W WO2017208509A1 WO 2017208509 A1 WO2017208509 A1 WO 2017208509A1 JP 2017005428 W JP2017005428 W JP 2017005428W WO 2017208509 A1 WO2017208509 A1 WO 2017208509A1
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WIPO (PCT)
Prior art keywords
electrode
separator
storage device
electrodes
sides
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2017/005428
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English (en)
Japanese (ja)
Inventor
徹 川合
大塚　正博
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Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Filing date
Publication date
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Publication of WO2017208509A1 publication Critical patent/WO2017208509A1/fr
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • H01M50/466—U-shaped, bag-shaped or folded
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/52—Separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a power storage device and a manufacturing method thereof.
  • Patent Document 1 describes an example of a secondary battery that is not rectangular in plan view.
  • a first electrode that is not rectangular in plan view, a separator (separation film) that is not rectangular in plan view, and a second electrode that is not rectangular in plan view are in this order.
  • the secondary battery described in Patent Document 1 is a stacked secondary battery.
  • the main object of the present invention is to provide an inexpensive electricity storage device that is not rectangular in plan view.
  • the first power storage device includes a first electrode, a second electrode, a separator, and an electrolyte.
  • the first electrode has a rectangular first electrode body and a first electrode protrusion.
  • the first electrode protrusion protrudes from one end extending along one direction of the first electrode body in a direction different from the one direction.
  • the second electrode has a rectangular second electrode main body and a second electrode protrusion.
  • the second electrode body is stacked on the first electrode body.
  • the second electrode protrusion protrudes from one end extending along one direction of the second electrode main body in a direction different from the one direction.
  • the second electrode protrusion is stacked on the first electrode protrusion.
  • the separator is provided between at least one of the first and second electrodes and the electrodes located on both sides of the electrode.
  • the separator covers both sides in one direction of the first and second electrode bodies in the first region where the first electrode body and the second electrode body are laminated.
  • the separator does not cover one side or one side of the first and second electrode protrusions in the second region where the first electrode protrusions and the second electrode protrusions are stacked.
  • the electrolyte is impregnated in the separator.
  • the separator is provided between at least one of the first and second electrodes and the electrodes located on both sides of the electrode. For this reason, the number of separators can be reduced as compared with the case where a separate separator is provided between each of the first electrode and the second electrode. For example, the number of separators used in the electricity storage device can be one. Therefore, cost reduction of the electricity storage device can be achieved.
  • the separator provided between at least one of the first and second electrodes and the electrodes located on both sides of the electrode includes a portion located on one side of the electrode and the electrode. A portion located on the other side is connected. If it is going to insulate more 1st electrodes and 2nd electrodes with a small number of separators, the side surfaces of many electrodes will be covered with a separator. For this reason, at the time of charging / discharging of an electrical storage device, the flow of electrolyte is inhibited and the charge / discharge characteristics of the electrical storage device tend to be lowered.
  • the 1st electrical storage device of the present invention the 2nd field where the separator does not cover the both sides or one side of one direction of the 1st and 2nd electrode convex part is provided. For this reason, in the 1st electrical storage device which concerns on this invention, the flow of the electrolyte at the time of charging / discharging is hard to be inhibited. Accordingly, the first power storage device according to the present invention has excellent charge / discharge characteristics.
  • the first power storage device according to the present invention has excellent charge / discharge characteristics while being inexpensive.
  • the separator may be wound around the first and second electrode bodies in the first region.
  • a second power storage device includes a first electrode, a second electrode, a separator, and an electrolyte.
  • the first electrode has a rectangular first electrode body and a first electrode protrusion.
  • the first electrode protrusion protrudes from one end extending along one direction of the first electrode body in a direction different from the one direction.
  • the second electrode has a rectangular second electrode main body and a second electrode protrusion.
  • the second electrode body is stacked on the first electrode body.
  • the second electrode protrusion protrudes from one end extending along one direction of the second electrode main body in a direction different from the one direction.
  • the second electrode protrusion is stacked on the first electrode protrusion.
  • the separator is provided between at least one of the first and second electrodes and the electrodes located on both sides of the electrode.
  • the separator covers one side of at least one of the first and second electrode bodies in the first region where the first electrode body and the second electrode body are stacked.
  • the separator does not cover both sides in one direction of the first and second electrode protrusions in the second region where the first electrode protrusions and the second electrode protrusions are stacked.
  • the electrolyte is impregnated in the separator.
  • the separator is provided between at least one of the first and second electrodes and the electrodes located on both sides of the electrode. For this reason, the number of separators can be reduced as compared with the case where a separate separator is provided between each of the first electrode and the second electrode. For example, the number of separators used in the electricity storage device can be one. Therefore, cost reduction of the electricity storage device can be achieved.
  • the separator provided between at least one of the first and second electrodes and the electrodes located on both sides of the electrode includes a portion located on one side of the electrode and the electrode. A portion located on the other side is connected. If it is going to insulate more 1st electrodes and 2nd electrodes with a small number of separators, the side surfaces of many electrodes will be covered with a separator. For this reason, at the time of charging / discharging of an electrical storage device, the flow of electrolyte is inhibited and the charge / discharge characteristics of the electrical storage device tend to be lowered.
  • the second electricity storage device of the present invention a second region that does not cover both sides in one direction of the first and second electrode protrusions is provided. For this reason, in the 2nd electrical storage device which concerns on this invention, the flow of the electrolyte at the time of charging / discharging is hard to be inhibited. Therefore, the second electricity storage device according to the present invention has excellent charge / discharge characteristics.
  • the second power storage device has excellent charge / discharge characteristics while being inexpensive.
  • the separator may have a 99-fold shape that sandwiches the first and second electrode bodies in the first region.
  • the separator may be provided in a bag shape that accommodates the first or second electrode body in the first region.
  • the manufacturing method of the 1st electrical storage device of this invention is related with the method of manufacturing the 1st electrical storage device of this invention.
  • An electrode body having the first and second regions is formed by cutting off a part of the laminated body made only of the separator.
  • the first power storage device of the present invention can be preferably manufactured.
  • the second power storage device manufacturing method of the present invention relates to a method of manufacturing the second power storage device of the present invention.
  • An electrode body having first and second regions is formed by cutting off a part of the separator on one side in one direction of the laminate.
  • the second power storage device of the present invention can be preferably manufactured.
  • an inexpensive power storage device that is not rectangular in a plan view can be provided.
  • FIG. 3 is a schematic cross-sectional view taken along line III-III in FIG. 2. It is a schematic plan view of the positive electrode in 1st Embodiment. It is a typical top view of the negative electrode in a 1st embodiment. It is a typical perspective view of the electrode body in a 2nd embodiment.
  • FIG. 7 is a schematic cross-sectional view taken along line VII-VII in FIG. 6. It is a typical perspective view of the electrode body in 3rd Embodiment.
  • FIG. 9 is a schematic cross-sectional view taken along line IX-IX in FIG. 8. It is a typical perspective view of the electrode body in a 4th embodiment. It is typical sectional drawing in line XI-XI of FIG.
  • FIG. 1 is a schematic perspective view of the electricity storage device according to the first embodiment.
  • FIG. 2 is a schematic perspective view of the electrode body in the first embodiment.
  • 3 is a schematic cross-sectional view taken along line III-III in FIG.
  • a battery such as a secondary battery, a capacitor such as an electric double layer capacitor, or the like.
  • the electricity storage device 1 includes a case 2.
  • Case 2 has a non-rectangular shape in plan view.
  • the plan view shape of the case 2 may be, for example, an L shape, an H shape, a U shape, a T shape, or the like. That is, in the present invention, the case may have any shape as long as the shape in plan view is not rectangular.
  • Case 2 may be made of a conductor or may be made of an insulator.
  • the case 2 can be made of, for example, a metal such as aluminum, stainless steel, or copper, a laminate foil, a resin, or the like.
  • a first terminal 2 a and a second terminal 2 b are provided on one side of the case 2.
  • One of the first terminal 2a and the second terminal 2b constitutes a positive terminal, and the other constitutes a negative terminal.
  • only the positive electrode terminal may be provided, and the negative electrode terminal may be constituted by the conductive case 2.
  • the first terminal 2 a and the second terminal 2 b may be provided directly on the side surface of the case 2, or may be pulled out from the side surface of the case 2 by a tab.
  • the planar view shape of the electrode body 3 is a shape along the planar view shape of the case 2.
  • both the case 2 and the electrode body 3 are provided in an L shape.
  • the electrode body is provided in an H shape.
  • the case is U-shaped, the electrode body is provided in a U-shape.
  • the electrode body 3 includes a positive electrode 11, a negative electrode 12, and a separator 13.
  • the positive electrode 11 and the negative electrode 12 are opposed to each other through the separator 13.
  • the separator 13 separates the positive electrode 11 and the negative electrode 12 from each other and is insulated.
  • one of the first electrode and the second electrode constitutes a positive electrode, and the other constitutes a negative electrode.
  • the configuration of the positive electrode 11 can be appropriately determined depending on the type of the electricity storage device 1.
  • the positive electrode 11 can be configured by a positive electrode current collector and an active material layer provided on at least one surface of the positive electrode current collector.
  • the positive electrode 11 can be composed of a positive electrode current collector and a polarizable electrode layer provided on at least one surface of the positive electrode current collector. it can.
  • the configuration of the negative electrode 12 can be appropriately determined depending on the type of the electricity storage device 1.
  • the negative electrode 12 when the electricity storage device 1 is a secondary battery, the negative electrode 12 can be constituted by a negative electrode current collector and an active material layer provided on at least one surface of the negative electrode current collector.
  • the negative electrode 12 when the electricity storage device 1 is an electric double layer capacitor, the negative electrode 12 can be constituted by a negative electrode current collector and a polarizable electrode layer provided on at least one surface of the negative electrode current collector. it can.
  • the separator 13 can be constituted by, for example, a porous sheet having continuous pores in which ions in the electrolyte can move.
  • the separator 13 may be made of, for example, polypropylene, polyethylene, polyimide, cellulose, aramid, polyvinylidene fluoride, Teflon (registered trademark), or the like.
  • the surface of the separator 13 may be covered with a ceramic coat layer, an adhesive layer, or the like.
  • the surface of the separator 13 may have adhesiveness.
  • the separator 13 may be a single layer film made of one kind of material, or a composite film or a multilayer film made of one kind or two or more kinds of materials.
  • an insulating layer such as a ceramic coat layer may be provided on the surfaces of the positive electrode 11 and the negative electrode 12.
  • An undercoat layer containing carbon or the like may be provided between the current collectors of the positive electrode 11 and the negative electrode 12 and the active material layer.
  • the separator 13 is impregnated with an electrolyte.
  • the electrolyte includes a solute and a solvent.
  • a Li salt such as LiPF 6 or LiBF 4 is preferably used as the solute.
  • the solvent include ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), and diethyl carbonate (DEC) when the electricity storage device 1 is a secondary battery.
  • An organic solvent is preferably used.
  • the electrolyte may be a liquid or a polymer.
  • the electrode body 3 is L-shaped in plan view. Specifically, a planar view L-shaped positive electrode 11 that is not rectangular in plan view and a planar view L-shaped negative electrode 12 that is not rectangular in plan view are stacked.
  • the positive electrode 11 has a positive electrode body 11a and a positive electrode protrusion 11b.
  • the positive electrode body 11a has a rectangular shape.
  • the positive electrode convex portion 11b is a y-axis that is a direction different from the x-axis direction (typically, an orthogonal direction) from one end side 11a1 extending along the x-axis direction (one direction) of the positive electrode main body 11a. It protrudes in the direction.
  • the positive electrode protrusion 11b has a rectangular shape.
  • the shape of the positive electrode protrusion 11b is not particularly limited.
  • the positive electrode convex portion 11b may be, for example, a dome shape, a trapezoidal shape, a triangular shape, a parallelogram shape, a rhombus shape, a semicircular shape, or the like.
  • the shape of the positive electrode protrusion 11 b can be determined by the shape of the case 2.
  • the negative electrode 12 has a negative electrode body 12a and a negative electrode protrusion 12b.
  • One of the negative electrode main body 12a and the positive electrode main body 11a constitutes a first electrode main body, and the other constitutes a second electrode main body.
  • One of the negative electrode protrusion 12b and the positive electrode protrusion 11b forms a first electrode protrusion, and the other forms a second electrode protrusion.
  • the negative electrode body 12a has a rectangular shape.
  • the negative electrode main body 12a and the positive electrode main body 11a are stacked in the z-axis direction, which is the stacking direction, via the separator 13.
  • the negative electrode protrusion 12b extends from the end 12a1 extending along the x-axis direction (one direction) of the negative electrode body 12a in the y-axis direction, which is a direction different from the x-axis direction (typically, a perpendicular direction). Protrusively.
  • the negative electrode convex part 12b and the positive electrode convex part 11b are laminated
  • the negative electrode protrusion 12b has a rectangular shape.
  • the shape of the negative electrode protrusion 12b is not particularly limited.
  • the negative electrode protrusion 12b may be, for example, a dome shape, a trapezoidal shape, a triangular shape, a parallelogram shape, a rhombus shape, or a semicircular shape.
  • the shape of the negative electrode protrusion 12 b can be determined by the shape of the case 2.
  • the separator 13 is disposed between the positive electrode 11 and the negative electrode 12, and insulates the positive electrode 11 and the negative electrode 12.
  • the separator 13 includes a separator provided between at least one of the positive electrode 11 and the negative electrode 12 and electrodes located on both sides of the electrode.
  • the electrode body 3 has one separator 13.
  • the separator 13 is in the x-axis direction (one direction) of the first and second electrode main bodies 11a and 12a. It is provided so as to cover both sides. Specifically, the separator 13 is wound around the positive electrode body 11a and the negative electrode body 12a in the first region A1. In other words, in the first region A1, along the z-axis direction, which is the stacking direction, so that the positive electrode body 11a and the negative electrode body 12a face each other with the separator 13 in the wound separator 13. The separators 13 are alternately positioned between adjacent separators 13.
  • the second region A2 in which the positive electrode convex portion 11b and the negative electrode convex portion 12b are stacked as shown in FIG. 3, one side or both sides of the positive electrode convex portion 11b and the negative electrode convex portion 12b in the x-axis direction. Is not covered.
  • the second region A2 covers one side of the positive electrode convex portion 11b and the negative electrode convex portion 12b in the x-axis direction.
  • the separator 13 has a shape in which the other side of the wound separator 13 in the x-axis direction is cut off.
  • the positive electrode convex portion 11b protrudes from one end portion in the x-axis direction of one end side 11a1 of the positive electrode main body 11a, and the negative electrode convex portion 12b extends from the one end side 11a1 of the negative electrode main body 11a.
  • the example which protrudes from the one side edge part of a x-axis direction was demonstrated.
  • the present invention is not limited to this configuration.
  • the positive electrode convex part 11b protrudes from the middle part of the one end side 11a1 of the positive electrode body 11a in the x-axis direction
  • the negative electrode convex part 12b extends from the middle part of the one end side 11a1 of the negative electrode body 11a in the x-axis direction. It may be protruding.
  • the positive electrode may have a plurality of positive electrode protrusions.
  • the negative electrode may have a plurality of negative electrode protrusions.
  • a laminate including separators 13 covering both sides in the direction of is prepared.
  • the electrode body 3 having the first and second regions A1 and A2 is manufactured by cutting away a part of the laminated body made only from the separator 13.
  • the electrode body 3 is accommodated in the case 2, the positive electrode 11 and the positive electrode terminal 2a are electrically connected, and the negative electrode 12 and the negative electrode terminal 2b are electrically connected.
  • the separator 13 is impregnated with the electrolyte by filling the case 2 with the electrolyte.
  • the electricity storage device 1 can be manufactured through the above steps.
  • the separator 13 is provided between at least one of the positive electrode 11 and the negative electrode 12 and the electrodes located on both sides of the electrode. For this reason, the number of separators 13 can be reduced as compared with the case where separate separators are provided between the positive electrode and the negative electrode. Therefore, cost reduction of the electrical storage device 1 can be achieved.
  • the electricity storage device 1 has one separator 13. Therefore, further cost reduction of the electricity storage device 1 can be achieved.
  • the separator 13 In order to reduce the number of separators included in the electricity storage device, it is preferable to provide the separator 13 in a spiral shape (winding shape) like the electricity storage device 1.
  • the number of separators included in the electrode body is not necessarily one.
  • a plurality of electrode bodies 3 shown in FIG. 2 may be stacked in the z-axis direction and accommodated in the case.
  • a positive electrode 11 and a negative electrode 12 may be further laminated on the electrode body 3 shown in FIG. 2, and a sheet-like separator may be disposed between each of the positive electrode 11 and the negative electrode 12.
  • a nineteen-fold separator may be provided.
  • the 99-fold separator may be connected to the separator 13 shown in FIG.
  • the separator 13 provided between at least one of the positive electrode 11 and the negative electrode 12 and the electrode located on both sides of the electrode includes a portion located on one side of the electrode, A portion located on the other side is connected. If an attempt is made to insulate a larger number of positive electrodes 11 and negative electrodes 12 with a small number of separators, the side surfaces of many electrodes will be covered with the separators. For this reason, at the time of charging / discharging of an electrical storage device, the flow of electrolyte is inhibited and the charge / discharge characteristics of the electrical storage device tend to be lowered.
  • the second region A2 is provided in which the separator 13 does not cover one side of the positive electrode convex portion 11b and the negative electrode convex portion 12b in the x-axis direction (one direction). For this reason, in the electrical storage device 1, the flow of the electrolyte during charging / discharging is hardly inhibited. Therefore, the electricity storage device 1 has excellent charge / discharge characteristics.
  • the electricity storage device 1 has excellent charge / discharge characteristics while being inexpensive.
  • FIG. 6 is a schematic perspective view of an electrode body according to the second embodiment.
  • FIG. 7 is a schematic cross-sectional view taken along line VII-VII in FIG. Also, FIG. 1 is referred to in common with the first embodiment.
  • the electricity storage device according to the second embodiment differs from the electricity storage device 1 according to the first embodiment in the shape of the separator 13.
  • the separator 13 has at least one direction (x-axis direction) of the first and second electrode bodies 11a and 12a in the first region A1. It covers one side. Specifically, in the present embodiment, the separator 13 is provided in a ninety-nine fold shape in the first region A1. For this reason, the separator 13 covers one side of the positive electrode 11 in the x-axis direction, does not cover the other side, does not cover the one side of the negative electrode 12 in the x-axis direction, and covers the other side.
  • the separator 13 does not cover at least one side of one direction (x-axis direction) of the positive electrode convex portion 11b and the negative electrode convex portion 12b in the second region A2. Specifically, in the present embodiment, the separator 13 covers one side of the positive electrode 11 in the x-axis direction, but does not cover the other side. The separator 13 does not cover both sides of the negative electrode 12 in the x-axis direction.
  • the separator 13 is provided between at least one of the positive electrode 11 and the negative electrode 12 and the electrodes located on both sides of the electrode. For this reason, the number of separators 13 can be reduced as compared with the case where separate separators are provided between the positive electrode and the negative electrode. Therefore, cost reduction of the electricity storage device can be achieved.
  • the electricity storage device of the present embodiment has excellent charge / discharge characteristics.
  • the power storage device according to the second embodiment also has excellent charge / discharge characteristics while being inexpensive.
  • the power storage device according to the second embodiment can also be manufactured by a method substantially similar to the example of the manufacturing method described in the first embodiment, for example. Therefore, in 2nd Embodiment, the description of the manufacturing method of the electrical storage device in 1st Embodiment shall be used.
  • the negative electrode 12 provided between the positive electrode 11, the negative electrode 12, at least one of the positive electrode 11 and the negative electrode 12, and the electrodes located on both sides of the electrode, and A laminate including a separator 13 covering one side in one direction of at least one of the positive electrode 11 and the negative electrode 12 is prepared.
  • FIG. 8 is a schematic perspective view of an electrode body according to the third embodiment.
  • FIG. 9 is a schematic cross-sectional view taken along line IX-IX in FIG. Also, FIG. 1 is referred to in common with the first embodiment.
  • the separator 13 is in one direction (x-axis direction) of one of the first and second electrode bodies 11a and 12a in the first region A1. Covers one side.
  • the separator 13 is provided in a substantially U shape when viewed from the y-axis direction.
  • the negative electrode 12 is sandwiched between the separators 13. For this reason, the separator 13 does not cover both sides of the positive electrode 11 in the x-axis direction, and does not cover one side of the negative electrode 12 in the x-axis direction, but covers the other side.
  • the separator 13 does not cover both sides of the positive electrode convex portion 11b and the negative electrode convex portion 12b in the x-axis direction in the second region A2.
  • the separator 13 is provided between at least one of the positive electrode 11 and the negative electrode 12 and the electrodes located on both sides of the electrode. For this reason, the number of separators 13 can be reduced as compared with the case where separate separators are provided between the positive electrode and the negative electrode. Therefore, cost reduction of the electricity storage device can be achieved.
  • both sides of the positive electrode convex portion 11b and the negative electrode convex portion 12b in the x-axis direction are not covered with the separator 13. For this reason, in the electrical storage device of this embodiment, the flow of the electrolyte during charging and discharging is not easily inhibited. Therefore, the electricity storage device of the present embodiment has excellent charge / discharge characteristics.
  • the electricity storage device also has excellent charge / discharge characteristics while being inexpensive.
  • FIG. 10 is a schematic perspective view of an electrode body according to the fourth embodiment.
  • FIG. 11 is a schematic cross-sectional view taken along line XI-XI in FIG.
  • the separator 13 has a bag shape in which the positive electrode 11 is accommodated in the first region A1. For this reason, in the first region A1, the separator 13 covers both sides of one direction (x-axis direction) of the positive electrode 11. In the first region A1, the separator 13 does not cover both sides of the negative electrode 12 in the x-axis direction.
  • the separator 13 covers one side in the x-axis direction of the positive electrode convex portion 11b in the second region A2, but does not cover the other side.
  • the separator 13 is provided between at least one of the positive electrode 11 and the negative electrode 12 and the electrodes located on both sides of the electrode. For this reason, the number of separators 13 can be reduced as compared with the case where separate separators are provided between the positive electrode and the negative electrode. Therefore, cost reduction of the electricity storage device can be achieved.
  • the electricity storage device of the present embodiment has excellent charge / discharge characteristics.
  • the electricity storage device according to the fourth embodiment is also inexpensive and has excellent charge / discharge characteristics.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
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  • Cell Separators (AREA)

Abstract

L'invention concerne un dispositif de stockage d'énergie bon marché qui n'est pas rectangulaire en vue plane. Un séparateur (13) recouvre les deux côtés d'un premier corps d'électrode (11) et d'un second corps d'électrode (12) dans une direction, dans une première région (A1) dans laquelle le premier corps d'électrode (11a) et le second corps d'électrode (12a) sont stratifiés l'un sur l'autre. Le séparateur (13) ne recouvre pas un ou les deux côtés d'une première saillie d'électrode (11b) et d'une seconde saillie d'électrode (12b) dans ladite direction dans une seconde région (A2) dans laquelle la première saillie d'électrode (11b) et la seconde saillie d'électrode (12b) sont stratifiées l'une sur l'autre.
PCT/JP2017/005428 2016-05-31 2017-02-15 Dispositif de stockage d'énergie et son procédé de fabrication Ceased WO2017208509A1 (fr)

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