WO2018055875A1 - Power storage device - Google Patents

Power storage device Download PDF

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Publication number
WO2018055875A1
WO2018055875A1 PCT/JP2017/024607 JP2017024607W WO2018055875A1 WO 2018055875 A1 WO2018055875 A1 WO 2018055875A1 JP 2017024607 W JP2017024607 W JP 2017024607W WO 2018055875 A1 WO2018055875 A1 WO 2018055875A1
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WO
WIPO (PCT)
Prior art keywords
electrode
storage device
lid
case
electricity storage
Prior art date
Application number
PCT/JP2017/024607
Other languages
French (fr)
Japanese (ja)
Inventor
佳介 島田
烈 田原
雄二 水口
弘隆 前吉
Original Assignee
株式会社村田製作所
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Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Publication of WO2018055875A1 publication Critical patent/WO2018055875A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • 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
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a power storage device.
  • Patent Document 1 describes an electricity storage device in which an electrode assembly (electrode body) is accommodated in a case.
  • the electricity storage device described in Patent Literature 1 is an electricity storage device whose planar view shape is not rectangular.
  • An electrical storage device is required to be easily manufactured from the viewpoint of reducing manufacturing costs.
  • an electricity storage device having a non-rectangular shape in plan view has a problem that it is difficult to manufacture because the electrode body is difficult to insert into the case, and the manufacturing cost increases.
  • the main object of the present invention is to provide an electricity storage device having a rectangular shape in plan view, which can be easily manufactured and has a low manufacturing cost.
  • the electricity storage device includes a case, a first terminal, a second terminal, an electrode body, and an electrolyte.
  • the case has a rectangular shape in plan view with a notch.
  • the case includes a case body and a lid. At least one side surface of the case body is open. The lid closes at least one side opening.
  • the first terminal is provided on the lid.
  • the second terminal is provided on the lid.
  • the electrode body includes a first electrode, a second electrode, and a separator.
  • the first electrode is connected to the first terminal.
  • the second electrode is connected to the second terminal.
  • the separator is disposed between the first electrode and the second electrode.
  • the electrode body is integrated.
  • the electrolyte is filled in the case. At least one of the side surfaces includes a side surface facing the side surface forming the notch.
  • the lid and the case body are welded in a state where the electrode body connected to the lid is inserted into the case body.
  • the “rectangular shape” includes a rectangular shape with rounded corners and a rectangular shape with chamfered corners.
  • the lid and the electrode body are connected. For this reason, an electrical storage device can be drawn easily by inserting the electrode body connected to the lid into the case body and welding the lid and the case body. Moreover, the opening of the case main body to which the lid is welded is provided so that at least one side surface faces the side surface constituting the cutout portion. For this reason, although the case body is non-rectangular, the electrode body connected to the lid can be easily inserted into the case body. Therefore, the electricity storage device of the present invention is easy to manufacture and has a low manufacturing cost.
  • At least one side face is constituted by one side face facing the side face constituting the notch.
  • the opening is preferably rectangular.
  • an electricity storage device having a rectangular shape in plan view, which can be easily manufactured, and has a low manufacturing cost can be provided.
  • FIG. 1 is a schematic perspective view of the electricity storage device according to the first embodiment.
  • FIG. 2 is a schematic exploded perspective view of the electricity storage device according to the first embodiment.
  • 3 is a schematic cross-sectional view taken along line III-III in FIG.
  • FIG. 4 is a schematic plan view for explaining a manufacturing process of the electricity storage device according to the first embodiment.
  • FIG. 5 is a schematic plan view of the electricity storage device according to the second embodiment.
  • FIG. 6 is a schematic plan view of the electricity storage device according to the third embodiment.
  • FIG. 1 is a schematic perspective view of the electricity storage device according to the first embodiment.
  • FIG. 2 is a schematic exploded perspective view of the electricity storage device according to the first embodiment.
  • 3 is a schematic cross-sectional view taken along line III-III in FIG.
  • a power storage device 1 shown in FIGS. 1 to 3 is a power storage device including an electrolyte 4 (see FIG. 3) such as an electrolyte or a gel electrolyte.
  • the electricity storage device 1 may be, for example, a battery such as a secondary battery or a capacitor such as an electric double layer capacitor.
  • the electricity storage device 1 includes a case 2.
  • the case 2 is a substantially rectangular parallelepiped shape in which the planar view shape has the notch part 2a. Specifically, in plan view, each corner has a cut-out portion 2a rounded and has a rectangular shape with rounded corners.
  • Case 2 can be made of metal such as aluminum, stainless steel, iron, nickel, or the like.
  • Case 2 has a case body 2A and a lid 2B. At least one side surface of the case main body 2A is open. Specifically, as shown in FIG. 2, the opening 2 ⁇ / b> A ⁇ b> 1 of the case main body 2 ⁇ / b> A opens toward one side in the length direction L.
  • the opening 2A1 is rectangular.
  • the case main body 2A includes a first main wall 21, a second main wall 22, a first side wall 23, a second side wall 24, a third side wall 25, and a fourth side wall. It has a side wall part 26 and a fifth side wall part 27.
  • Each of the first and second main wall portions 21 and 22 has a substantially rectangular shape having a notch portion in plan view.
  • the first main wall portion 21 and the second main wall portion 22 face each other in the thickness direction T.
  • the first main wall portion 21 and the second main wall portion 22 are a first side wall portion 23, a second side wall portion 24, a third side wall portion 25, a fourth side wall portion 26,
  • the fifth side wall 27 is connected.
  • Opening 2A1 is comprised by the part in which the side wall part is not provided among the case main bodies.
  • the notch 2 a is composed of a third side wall 25 and a fourth side wall 26.
  • the first side wall portion 23 faces the third side wall portion 25 in the width direction W.
  • a plurality of side surfaces of the case main body 2A may be open.
  • the open side surface is formed of the side surface (the side surface constituted by the third side wall portion 25 and the fourth side wall portion 26) constituting the cutout portion 2a in the case body 2A. At least one side surface opposite to the other side surface.
  • the open side surface may be only the side surface of the case main body 2 ⁇ / b> A that faces the side surface forming the notch 2 a, or may include other side surfaces.
  • an opening may be provided in a portion where the first side wall portion 23 is provided, and a portion where the opening 2A1 is provided may be closed by the side wall portion.
  • a portion where the opening 2A1 is provided may be closed by the side wall portion.
  • at least one of the first sidewall portion 23 and the fifth sidewall portion 27 may be opened.
  • case main body 2A may be provided integrally or may be constituted by a joined body of a plurality of members.
  • the lid 2B is welded to the case body 2A, and closes the opening 2A1 of the case body 2A.
  • the lid 2B is provided with an inlet 61 for electrolyte injection.
  • an electrolyte such as an electrolytic solution is injected from the inlet 61.
  • the injection liquid can be easily injected.
  • the injection port 61 is sealed so that electrolyte or the like does not leak from the injection port 61.
  • the lid 2B is provided with a first terminal 41 and a second terminal 42.
  • One of the first and second terminals 41 and 42 constitutes a positive electrode terminal, and the other constitutes a negative electrode terminal.
  • the positive electrode terminal is connected to a positive electrode 31 described later, and the negative electrode terminal is connected to a negative electrode 32 described later.
  • an integrated electrode body 3 is arranged inside the case 2.
  • the electrode body 3 includes a positive electrode 31, a negative electrode 32, and a separator 33.
  • the positive electrode 31 and the negative electrode 32 face each other in the thickness direction T with the separator 33 interposed therebetween.
  • a separator 33 is disposed between the positive electrode 31 and the negative electrode 32.
  • the separator 33 insulates the positive electrode 31 and the negative electrode 32 from each other. Specifically, the end sides of the separators 33 adjacent to each other are connected via the positive electrode 31.
  • the two separators 33 adjacent to each other constitute a bag-shaped separator 33a.
  • the positive electrode 31 is disposed in the bag-shaped separator 33a. But in this invention, the separator which adjoins in the thickness direction T does not need to be joined and made into the bag shape. In the present invention, a sheet-like or 99-fold separator may be provided between the positive electrode and the negative electrode.
  • the electrode body 3 is a stacked electrode body in which the sheet-like positive electrode 31, the separator 33, and the sheet-like negative electrode 32 are laminated has been described.
  • the present invention is not limited to this.
  • the electrode body is not particularly limited as long as it has a configuration capable of storing electric power.
  • the electrode body may be constituted by a wound body in which a laminated sheet in which a positive electrode, a separator, and a negative electrode are laminated in this order is wound.
  • the electrode body is preferably a stacked electrode body.
  • the configuration of the positive electrode 31 can be appropriately determined depending on the type of the electricity storage device 1.
  • the positive electrode 31 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 31 can be constituted by 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 positive electrode 31 contains a binder.
  • the positive electrode active material layer, the polarizable electrode layer, and the like of the positive electrode 31 contain a binder.
  • the positive electrode 31 is drawn from the electrode body 3 in the length direction L, and is connected to one of the first and second terminals 41 and 42.
  • the configuration of the negative electrode 32 can be appropriately determined depending on the type of the electricity storage device 1.
  • the negative electrode 32 when the electricity storage device 1 is a secondary battery, the negative electrode 32 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 32 when the electricity storage device 1 is an electric double layer capacitor, the negative electrode 32 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 negative electrode 32 contains a binder.
  • the negative electrode active material layer, polarizable electrode layer, and the like of the negative electrode 32 contain a binder.
  • the negative electrode 32 is drawn out in the length direction L from the electrode body 3 and is connected to the other of the first and second terminals 41 and 42.
  • the separator 33 can be constituted by, for example, a porous sheet having open cells to which ions in the electrolyte can move.
  • the separator 33 may be made of, for example, polypropylene, polyethylene, polyimide, cellulose, aramid, polyvinylidene fluoride, Teflon (registered trademark), or the like.
  • the surface of the separator 33 may be covered with a ceramic coat layer, an adhesive layer, or the like.
  • the surface of the separator 33 may have adhesiveness.
  • the separator 33 may be a single layer film made of one material, or a composite film or a multilayer film made of one kind or two or more kinds of materials.
  • the positive electrode 31, the separator 33, and the negative electrode 32 are stacked a plurality of times in this order.
  • the laminate 34 of the positive electrode 31, the separator 33, and the negative electrode 32 is integrated.
  • the electrode body 3 further includes a tape 5. With this tape 5, the laminate 34 is integrated to form an integrated electrode body 3.
  • the base material of the tape 5 may be polypropylene, polyethylene terephthalate, polyimide, or the like.
  • the pressure-sensitive adhesive may be composed of acrylic, silicone, rubber-based, etc. having electrolyte resistance.
  • the method for integrating the positive electrode, the separator and the negative electrode is not particularly limited.
  • the positive electrode and the separator may be bonded, and the electrode body 3 may be integrated by bonding the separator and the negative electrode.
  • the tape 5 includes a first tape 51 and a second tape 52.
  • the first tape 51 is provided on the W1 side of the stacked body 34.
  • the first tape 51 straddles the first main surface 3a and the second main surface 3b of the stacked body 34 via one side (W1 side) side surface in the width direction W of the stacked body 34. Is provided.
  • the first tape 51 fixes the W1 side end of the separator 33 in a state bent toward the T1 side in the thickness direction T.
  • the second tape 52 is provided on the W2 side of the laminated body 34.
  • the second tape 52 straddles the first main surface 3a and the second main surface 3b of the laminate 34 via the other side (W2 side) side surface in the width direction W of the electrode body 3. Is provided.
  • the second tape 52 fixes the W2 side end of the separator 33 in a state bent toward the T1 side in the thickness direction T.
  • the present invention is not limited to this configuration.
  • the adjacent positive electrode and separator may be bonded together, and the electrode body 3 may be integrated by bonding the adjacent negative electrode and separator.
  • the case 2 and the electrode located in the outermost layer of the electrode body 3 have the same potential. This is because a short circuit does not occur even when the case 2 and the electrode located in the outermost layer of the electrode body 3 are in contact with each other.
  • the case 2 is filled with an electrolyte 4.
  • the electrode body 3 is impregnated with the electrolyte 4.
  • the type of the electrolyte 4 is not particularly limited. It can be appropriately selected according to the characteristics required for the electricity storage device 1, the positive electrode 31, the negative electrode 32, and the like.
  • spacers 6 a and 6 b are provided between the electrode body 3 and the case 2 in the thickness direction T.
  • the spacers 6 a and 6 b suppress the displacement of the electrode body 3 in the case 2.
  • the spacers 6a and 6b are not particularly limited as long as they are made of a material that does not react with the electrolyte.
  • the spacers 6a and 6b may be made of the same material as the separator 33, for example. By configuring the spacers 6 a and 6 b with the same material as the separator, the spacers 6 a and 6 b are swollen by the electrolyte, and the electrode body 3 is more firmly fixed to the case 2.
  • an active material layer may be provided on one surface of the current collector, or an active material layer may be provided on both surfaces of the current collector. From the viewpoint of reducing the thickness of the electricity storage device 1, it is preferable that a negative electrode active material layer is provided on one surface of the negative electrode current collector.
  • one of the first and second terminals 41 and 42 provided on the lid 2B is connected to the positive electrode 31 of the electrode body 3, and the other is connected to the negative electrode 32.
  • the lid 2 ⁇ / b> B and the electrode body 3 are connected.
  • the electrode body 3 to which the lid 2B is connected is inserted into the case body 2A, and in this state, the lid 2B and the case body 2A are welded together.
  • an electrolyte is injected from the inlet 61 provided in the lid 2B. Thereafter, the inlet 61 is sealed.
  • the electrical storage device 1 can be manufactured through the above steps.
  • the lid 2 ⁇ / b> B is provided with the first and second terminals 41 and 42, and the first and second terminals 41 and 42 are connected to the electrode body 3. .
  • the side surface of the case body 2A that faces the side surface that forms the notch 2a is the opening 2A1.
  • the electrode body 3 connected to the lid 2B can be easily inserted into the non-rectangular case main body 2A. Therefore, the electricity storage device 1 is easy to manufacture.
  • the welding length between the case main body 2A and the lid 2B can be shortened. Therefore, manufacture of the electrical storage device 1 is easier. Furthermore, since the opening 2A1 and the lid 2B are rectangular, the lid 2B and the case body 2A can be easily welded. Therefore, it is easier to manufacture the electricity storage device 1.
  • FIG. 5 is a schematic plan view of an electricity storage device 1a according to the second embodiment.
  • FIG. 6 is a schematic plan view of an electricity storage device 1b according to the second embodiment.
  • the case main body 2 ⁇ / b> A may have a shape in which a notch 2 a is provided at the center in the length direction L of the side wall 28 extending along the length direction L. That is, the planar view shape of the case main body 2A may be a substantially U-shape.
  • an opening is provided on the side surface of the case body 2A facing the side surface formed by the side wall portion 28, and the lid 2B is welded to the opening. Therefore, similarly to the electricity storage device 1 according to the first embodiment, the electricity storage device 1a according to the present embodiment is easy to manufacture.
  • the case body 2 ⁇ / b> A may be provided with notches 2 a at both ends in the length direction L of the side wall portion 29 extending along the length direction L. That is, the shape of the case main body 2A in plan view may be a substantially T-shape.
  • the power storage device 1a according to the present embodiment is easy to manufacture.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

Provided is a power storage device, which is not rectangular in a plan view and which can be easily produced at low cost. A case 2 has a rectangular shape having a notch 2a in plan view. The case 2 includes a case body 2A and a lid 2B. At least one side surface of the case body 2A has an opening, and the opening is closed by the lid 2B. Terminals 41, 42 are provided on lid 2B. An electrode member 3 includes a first electrode 31, a second electrode 32, and a separator 33. The first electrode 31 is connected to the first terminal 41. The second electrode 32 is connected to the second terminal 42. The electrode member 3 is integrated. The at least one side surface includes a side surface facing the side surface constituting the notch 2a. The lid 2B and the case body 2A are welded together, with the electrode member 3 that is connected to the lid 2B being inserted in the case body 2A.

Description

蓄電デバイスPower storage device
　本発明は、蓄電デバイスに関する。 The present invention relates to a power storage device.
　従来、種々の電子機器の電源として、蓄電デバイスが用いられている。例えば、特許文献１には、ケースに電極組立体（電極体）が収容された蓄電デバイスが記載されている。特許文献１に記載の蓄電デバイスは、平面視形状が矩形状でない蓄電デバイスである。 Conventionally, power storage devices have been used as power sources for various electronic devices. For example, Patent Document 1 describes an electricity storage device in which an electrode assembly (electrode body) is accommodated in a case. The electricity storage device described in Patent Literature 1 is an electricity storage device whose planar view shape is not rectangular.
特表２０１５－５１８２５６号公報Special table 2015-518256
　蓄電デバイスにおいては、製造コストを低減する観点から、製造容易であることが求められている。特に、平面視形状が矩形状でない蓄電デバイスには、ケースへの電極体の挿入が困難なことから、製造が困難であり、製造コストが高くなるという問題がある。 An electrical storage device is required to be easily manufactured from the viewpoint of reducing manufacturing costs. In particular, an electricity storage device having a non-rectangular shape in plan view has a problem that it is difficult to manufacture because the electrode body is difficult to insert into the case, and the manufacturing cost increases.
　本発明の主な目的は、平面視形状が矩形状でない蓄電デバイスであって、容易に製造でき、低い製造コストを有する蓄電デバイスを提供することにある。 The main object of the present invention is to provide an electricity storage device having a rectangular shape in plan view, which can be easily manufactured and has a low manufacturing cost.
　本発明に係る蓄電デバイスは、ケースと、第１の端子と、第２の端子と、電極体と、電解質とを備える。ケースは、平面視形状が切欠部を有する矩形状である。ケースは、ケース本体と、蓋と備える。ケース本体の少なくとも一の側面が開口している。蓋は、少なくとも一の側面の開口を閉鎖している。第１の端子は、蓋に設けられている。第２の端子は、蓋に設けられている。電極体は、第１の電極と、第２の電極と、セパレータとを有する。第１の電極は、第１の端子に接続されている。第２の電極は、第２の端子に接続されている。セパレータは、第１の電極と第２の電極との間に配されている。電極体は、一体化されている。電解質は、ケース内に充填されている。少なくとも一の側面が切欠部を構成している側面と対向する側面を含む。蓋に接続された電極体がケース本体内に挿入された状態で蓋とケース本体とが溶接されている。 The electricity storage device according to the present invention includes a case, a first terminal, a second terminal, an electrode body, and an electrolyte. The case has a rectangular shape in plan view with a notch. The case includes a case body and a lid. At least one side surface of the case body is open. The lid closes at least one side opening. The first terminal is provided on the lid. The second terminal is provided on the lid. The electrode body includes a first electrode, a second electrode, and a separator. The first electrode is connected to the first terminal. The second electrode is connected to the second terminal. The separator is disposed between the first electrode and the second electrode. The electrode body is integrated. The electrolyte is filled in the case. At least one of the side surfaces includes a side surface facing the side surface forming the notch. The lid and the case body are welded in a state where the electrode body connected to the lid is inserted into the case body.
　なお、本発明において、「矩形状」には、角部が丸められた形状の矩形状や、角部が面取り状の矩形状が含まれるものとする。 In the present invention, the “rectangular shape” includes a rectangular shape with rounded corners and a rectangular shape with chamfered corners.
　本発明に係る蓄電デバイスでは、蓋と電極体とが接続されている。このため、ケース本体に、蓋に接続された電極体を挿入し、蓋とケース本体とを溶接することにより容易に蓄電デバイスを製図することができる。また、蓋が溶接されているケース本体の開口が、少なくとも一の側面が切欠部を構成している側面と対向するように設けられている。このため、ケース本体が非矩形状であるにも関わらず、蓋に接続された電極体をケース本体に挿入しやすい。従って、本発明の蓄電デバイスは、製造が容易であり、安価な製造コストを有する。 In the electricity storage device according to the present invention, the lid and the electrode body are connected. For this reason, an electrical storage device can be drawn easily by inserting the electrode body connected to the lid into the case body and welding the lid and the case body. Moreover, the opening of the case main body to which the lid is welded is provided so that at least one side surface faces the side surface constituting the cutout portion. For this reason, although the case body is non-rectangular, the electrode body connected to the lid can be easily inserted into the case body. Therefore, the electricity storage device of the present invention is easy to manufacture and has a low manufacturing cost.
　本発明に係る蓄電デバイスでは、少なくとも一の側面が、切欠部を構成している側面と対向するひとつの側面により構成されていることが好ましい。 In the electricity storage device according to the present invention, it is preferable that at least one side face is constituted by one side face facing the side face constituting the notch.
　本発明に係る蓄電デバイスでは、開口が矩形であることが好ましい。 In the electricity storage device according to the present invention, the opening is preferably rectangular.
　本発明によれば、平面視形状が矩形状でない蓄電デバイスであって、容易に製造でき、低い製造コストを有する蓄電デバイスを提供することができる。 According to the present invention, an electricity storage device having a rectangular shape in plan view, which can be easily manufactured, and has a low manufacturing cost can be provided.
図１は、第１の実施形態に係る蓄電デバイスの模式的斜視図である。FIG. 1 is a schematic perspective view of the electricity storage device according to the first embodiment. 図２は、第１の実施形態における蓄電デバイスの模式的分解斜視図である。FIG. 2 is a schematic exploded perspective view of the electricity storage device according to the first embodiment. 図３は、図１の線ＩＩＩ－ＩＩＩにおける模式的断面図である。3 is a schematic cross-sectional view taken along line III-III in FIG. 図４は、第１の実施形態に係る蓄電デバイスの製造工程を説明するための模式的平面図である。FIG. 4 is a schematic plan view for explaining a manufacturing process of the electricity storage device according to the first embodiment. 図５は、第２の実施形態に係る蓄電デバイスの模式的平面図である。FIG. 5 is a schematic plan view of the electricity storage device according to the second embodiment. 図６は、第３の実施形態に係る蓄電デバイスの模式的平面図である。FIG. 6 is a schematic plan view of the electricity storage device according to the third embodiment.
　以下、本発明を実施した好ましい形態の一例について説明する。但し、下記の実施形態は、単なる例示である。本発明は、下記の実施形態に何ら限定されない。 Hereinafter, an example of a preferable embodiment in which the present invention is implemented will be described. However, the following embodiment is merely an example. The present invention is not limited to the following embodiments.
　また、実施形態等において参照する各図面において、実質的に同一の機能を有する部材は同一の符号で参照することとする。また、実施形態等において参照する図面は、模式的に記載されたものである。図面に描画された物体の寸法の比率などは、現実の物体の寸法の比率などとは異なる場合がある。図面相互間においても、物体の寸法比率等が異なる場合がある。具体的な物体の寸法比率等は、以下の説明を参酌して判断されるべきである。 In each drawing referred to in the embodiment and the like, members having substantially the same function are referred to by the same reference numerals. The drawings referred to in the embodiments and the like are schematically described. A ratio of dimensions of an object drawn in a drawing may be different from a ratio of dimensions of an actual object. The dimensional ratio of the object may be different between the drawings. The specific dimensional ratio of the object should be determined in consideration of the following description.
　（第１の実施形態）
　図１は、第１の実施形態に係る蓄電デバイスの模式的斜視図である。図２は、第１の実施形態における蓄電デバイスの模式的分解斜視図である。図３は、図１の線ＩＩＩ－ＩＩＩにおける模式的断面図である。 (First embodiment)
FIG. 1 is a schematic perspective view of the electricity storage device according to the first embodiment. FIG. 2 is a schematic exploded perspective view of the electricity storage device according to the first embodiment. 3 is a schematic cross-sectional view taken along line III-III in FIG.
　図１～図３に示す蓄電デバイス１は、電解質やゲル電解質などの電解質４（図３を参照）を備える蓄電デバイスである。具体的には、蓄電デバイス１は、例えば、二次電池等の電池、電気二重層コンデンサ等のコンデンサ等であってもよい。 A power storage device 1 shown in FIGS. 1 to 3 is a power storage device including an electrolyte 4 (see FIG. 3) such as an electrolyte or a gel electrolyte. Specifically, the electricity storage device 1 may be, for example, a battery such as a secondary battery or a capacitor such as an electric double layer capacitor.
　図３に示すように、蓄電デバイス１は、ケース２を備えている。図１及び図２に示すように、ケース２は、平面視形状が切欠部２ａを有する略直方体状である。具体的には、平面視において、各角部が丸められた切欠部２ａを有し、かつ、角部が丸められた矩形状である。 As shown in FIG. 3, the electricity storage device 1 includes a case 2. As shown in FIG.1 and FIG.2, the case 2 is a substantially rectangular parallelepiped shape in which the planar view shape has the notch part 2a. Specifically, in plan view, each corner has a cut-out portion 2a rounded and has a rectangular shape with rounded corners.
　ケース２は、例えば、アルミニウム、ステンレス、鉄、ニッケル等の金属等により構成することができる。 Case 2 can be made of metal such as aluminum, stainless steel, iron, nickel, or the like.
　ケース２は、ケース本体２Ａと、蓋２Ｂとを有する。ケース本体２Ａの少なくとも一の側面が開口している。具体的には、図２に示すように、ケース本体２Ａの開口２Ａ１は、長さ方向Ｌの一方側に向かって開口している。開口２Ａ１は、矩形である。 Case 2 has a case body 2A and a lid 2B. At least one side surface of the case main body 2A is open. Specifically, as shown in FIG. 2, the opening 2 </ b> A <b> 1 of the case main body 2 </ b> A opens toward one side in the length direction L. The opening 2A1 is rectangular.
　ケース本体２Ａは、第１の主壁部２１と、第２の主壁部２２と、第１の側壁部２３と、第２の側壁部２４と、第３の側壁部２５と、第４の側壁部２６と、第５の側壁部２７とを有する。第１及び第２の主壁部２１，２２は、それぞれ、平面視形状が切欠部を有する略矩形状である。第１の主壁部２１と第２の主壁部２２とは、厚み方向Ｔにおいて対向している。第１の主壁部２１と第２の主壁部２２とは、第１の側壁部２３と、第２の側壁部２４と、第３の側壁部２５と、第４の側壁部２６と、第５の側壁部２７とにより接続されている。ケース本体のうち、側壁部が設けられていない部分により、開口２Ａ１が構成されている。切欠部２ａは、第３の側壁部２５と、第４の側壁部２６とにより構成されている。第１の側壁部２３は、第３の側壁部２５と、幅方向Ｗにおいて対向している。 The case main body 2A includes a first main wall 21, a second main wall 22, a first side wall 23, a second side wall 24, a third side wall 25, and a fourth side wall. It has a side wall part 26 and a fifth side wall part 27. Each of the first and second main wall portions 21 and 22 has a substantially rectangular shape having a notch portion in plan view. The first main wall portion 21 and the second main wall portion 22 face each other in the thickness direction T. The first main wall portion 21 and the second main wall portion 22 are a first side wall portion 23, a second side wall portion 24, a third side wall portion 25, a fourth side wall portion 26, The fifth side wall 27 is connected. Opening 2A1 is comprised by the part in which the side wall part is not provided among the case main bodies. The notch 2 a is composed of a third side wall 25 and a fourth side wall 26. The first side wall portion 23 faces the third side wall portion 25 in the width direction W.
　なお、本実施形態では、ケース本体２Ａのひとつの側面のみが開口している例について説明した。但し、本発明は、この構成に限定されない。例えば、ケース本体２Ａの複数の側面が開口していてもよい。具体的には、開口している側面が、ケース本体２Ａのうち、切欠部２ａを構成している側面（第３の側壁部２５により構成されている側面及び第４の側壁部２６により構成されている側面）と対向する側面を少なくともひとつ含んでいればよい。開口している側面が、ケース本体２Ａのうち、切欠部２ａを構成している側面と対向する側面のみであってもよいし、それに加え、その他の側面を含んでいてもよい。例えば、本実施形態において第１の側壁部２３が設けられている部分に開口が設けられており、開口２Ａ１が設けられている部分が側壁部により閉口されていてもよい。また、開口２Ａ１に加え、第１の側壁部２３及び第５の側壁部２７の少なくとも一方が開口していてもよい。 In the present embodiment, an example in which only one side surface of the case body 2A is opened has been described. However, the present invention is not limited to this configuration. For example, a plurality of side surfaces of the case main body 2A may be open. Specifically, the open side surface is formed of the side surface (the side surface constituted by the third side wall portion 25 and the fourth side wall portion 26) constituting the cutout portion 2a in the case body 2A. At least one side surface opposite to the other side surface. The open side surface may be only the side surface of the case main body 2 </ b> A that faces the side surface forming the notch 2 a, or may include other side surfaces. For example, in the present embodiment, an opening may be provided in a portion where the first side wall portion 23 is provided, and a portion where the opening 2A1 is provided may be closed by the side wall portion. In addition to the opening 2A1, at least one of the first sidewall portion 23 and the fifth sidewall portion 27 may be opened.
　また、ケース本体２Ａは、一体に設けられていてもよいし、複数の部材の接合体により構成されていてもよい。 Further, the case main body 2A may be provided integrally or may be constituted by a joined body of a plurality of members.
　蓋２Ｂは、ケース本体２Ａに溶接されており、ケース本体２Ａの開口２Ａ１を閉鎖している。 The lid 2B is welded to the case body 2A, and closes the opening 2A1 of the case body 2A.
　蓋２Ｂには、電解質注入用の注入口６１が設けられている。蓄電デバイス１の製造工程において、この注入口６１から電解液等の電解質が注入される。電解質を注入するための注入口６１を、ケース２の側面を構成している蓋２Ｂに設けておくことにより、注入液の注入を容易に行うことができる。注入口６１は、注入口６１から電解質等が漏れ出ないように封止されている。 The lid 2B is provided with an inlet 61 for electrolyte injection. In the manufacturing process of the electricity storage device 1, an electrolyte such as an electrolytic solution is injected from the inlet 61. By providing the inlet 61 for injecting the electrolyte in the lid 2 </ b> B constituting the side surface of the case 2, the injection liquid can be easily injected. The injection port 61 is sealed so that electrolyte or the like does not leak from the injection port 61.
　蓋２Ｂには、第１の端子４１と第２の端子４２とが設けられている。第１及び第２の端子４１，４２のうちの一方が正極端子を構成しており、他方が負極端子を構成している。正極端子が後述する正極３１と接続されており、負極端子が後述する負極３２と接続されている。 The lid 2B is provided with a first terminal 41 and a second terminal 42. One of the first and second terminals 41 and 42 constitutes a positive electrode terminal, and the other constitutes a negative electrode terminal. The positive electrode terminal is connected to a positive electrode 31 described later, and the negative electrode terminal is connected to a negative electrode 32 described later.
　図３に示すように、ケース２の内部には、一体化された電極体３が配されている。電極体３は、正極３１と、負極３２と、セパレータ３３とを有する。正極３１と負極３２とは、セパレータ３３を介して厚み方向Ｔにおいて対向している。厚み方向Ｔにおいて、正極３１と負極３２との間には、セパレータ３３が配されている。このセパレータ３３により、正極３１と負極３２とが絶縁されている。具体的には、正極３１を介して隣り合うセパレータ３３の端辺同士が接続されている。それら隣り合う２枚のセパレータ３３によって、袋状のセパレータ３３ａが構成されている。正極３１は、この袋状セパレータ３３ａ内に配されている。もっとも、本発明において、厚み方向Ｔにおいて隣り合うセパレータが接合されて袋状にされていなくてもよい。本発明においては、シート状又は九十九折り状のセパレータが正極と負極との間に設けられていてもよい。 As shown in FIG. 3, an integrated electrode body 3 is arranged inside the case 2. The electrode body 3 includes a positive electrode 31, a negative electrode 32, and a separator 33. The positive electrode 31 and the negative electrode 32 face each other in the thickness direction T with the separator 33 interposed therebetween. In the thickness direction T, a separator 33 is disposed between the positive electrode 31 and the negative electrode 32. The separator 33 insulates the positive electrode 31 and the negative electrode 32 from each other. Specifically, the end sides of the separators 33 adjacent to each other are connected via the positive electrode 31. The two separators 33 adjacent to each other constitute a bag-shaped separator 33a. The positive electrode 31 is disposed in the bag-shaped separator 33a. But in this invention, the separator which adjoins in the thickness direction T does not need to be joined and made into the bag shape. In the present invention, a sheet-like or 99-fold separator may be provided between the positive electrode and the negative electrode.
　本実施形態では、電極体３が、シート状の正極３１、セパレータ３３及びシート状の負極３２が積層された積層型の電極体である例について説明した。但し、本発明は、これに限定されない。本発明において、電極体は、電力を蓄積できる構成を有していれば特に限定されない。例えば、電極体は、正極、セパレータ及び負極がこの順番で積層された積層シートが巻回された巻回体により構成されていてもよい。もっとも、蓄電デバイスを薄型化する観点からは、電極体が積層型の電極体であることが好ましい。 In the present embodiment, an example in which the electrode body 3 is a stacked electrode body in which the sheet-like positive electrode 31, the separator 33, and the sheet-like negative electrode 32 are laminated has been described. However, the present invention is not limited to this. In the present invention, the electrode body is not particularly limited as long as it has a configuration capable of storing electric power. For example, the electrode body may be constituted by a wound body in which a laminated sheet in which a positive electrode, a separator, and a negative electrode are laminated in this order is wound. However, from the viewpoint of reducing the thickness of the electricity storage device, the electrode body is preferably a stacked electrode body.
　正極３１の構成は、蓄電デバイス１の種類によって適宜決定することができる。例えば、蓄電デバイス１が二次電池である場合は、正極３１は、正極集電体と、正極集電体の少なくとも一方面の上に設けられた活物質層とにより構成することができる。例えば、蓄電デバイス１が、電気二重層コンデンサである場合は、正極３１は、正極集電体と、正極集電体の少なくとも一方面の上に設けられた分極性電極層とにより構成することができる。通常、正極３１は、バインダーを含む。具体的には、正極３１の正極活物質層や分極性電極層等がバインダーを含んでいる。 The configuration of the positive electrode 31 can be appropriately determined depending on the type of the electricity storage device 1. For example, when the electricity storage device 1 is a secondary battery, the positive electrode 31 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. For example, when the electricity storage device 1 is an electric double layer capacitor, the positive electrode 31 can be constituted by a positive electrode current collector and a polarizable electrode layer provided on at least one surface of the positive electrode current collector. it can. Usually, the positive electrode 31 contains a binder. Specifically, the positive electrode active material layer, the polarizable electrode layer, and the like of the positive electrode 31 contain a binder.
　正極３１は、電極体３から長さ方向Ｌに引き出されており、第１及び第２の端子４１，４２の一方に接続されている。 The positive electrode 31 is drawn from the electrode body 3 in the length direction L, and is connected to one of the first and second terminals 41 and 42.
　負極３２の構成は、蓄電デバイス１の種類によって適宜決定することができる。例えば、蓄電デバイス１が二次電池である場合は、負極３２は、負極集電体と、負極集電体の少なくとも一方面の上に設けられた活物質層とにより構成することができる。例えば、蓄電デバイス１が、電気二重層コンデンサである場合は、負極３２は、負極集電体と、負極集電体の少なくとも一方面の上に設けられた分極性電極層とにより構成することができる。通常、負極３２は、バインダーを含む。具体的には、負極３２の負極活物質層や分極性電極層等がバインダーを含んでいる。 The configuration of the negative electrode 32 can be appropriately determined depending on the type of the electricity storage device 1. For example, when the electricity storage device 1 is a secondary battery, the negative electrode 32 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. For example, when the electricity storage device 1 is an electric double layer capacitor, the negative electrode 32 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. Usually, the negative electrode 32 contains a binder. Specifically, the negative electrode active material layer, polarizable electrode layer, and the like of the negative electrode 32 contain a binder.
　負極３２は、電極体３から長さ方向Ｌに引き出されており、第１及び第２の端子４１，４２の他方に接続されている。 The negative electrode 32 is drawn out in the length direction L from the electrode body 3 and is connected to the other of the first and second terminals 41 and 42.
　セパレータ３３は、例えば、電解質中のイオンが移動可能な連続気泡を有する多孔質シートにより構成することができる。セパレータ３３は、例えば、ポリプロピレン、ポリエチレン、ポリイミド、セルロース、アラミド、ポリフッ化ビニリデン、テフロン（登録商標）等により構成されていてもよい。また、セパレータ３３の表面がセラミックコート層や接着層等により覆われていてもよい。セパレータ３３の表面が接着性を有していてもよい。また、セパレータ３３は１種の材料からなる単層膜であってもよく、１種または２種類以上の材料からなる複合膜または多層膜であってもよい。 The separator 33 can be constituted by, for example, a porous sheet having open cells to which ions in the electrolyte can move. The separator 33 may be made of, for example, polypropylene, polyethylene, polyimide, cellulose, aramid, polyvinylidene fluoride, Teflon (registered trademark), or the like. The surface of the separator 33 may be covered with a ceramic coat layer, an adhesive layer, or the like. The surface of the separator 33 may have adhesiveness. The separator 33 may be a single layer film made of one material, or a composite film or a multilayer film made of one kind or two or more kinds of materials.
　蓄電デバイス１では、正極３１、セパレータ３３及び負極３２が、この順番で複数回積層されている。この正極３１、セパレータ３３及び負極３２の積層体３４が一体化されている。具体的には、電極体３は、テープ５をさらに有する。このテープ５により、積層体３４が一体化され、一体の電極体３が構成されている。 In the electricity storage device 1, the positive electrode 31, the separator 33, and the negative electrode 32 are stacked a plurality of times in this order. The laminate 34 of the positive electrode 31, the separator 33, and the negative electrode 32 is integrated. Specifically, the electrode body 3 further includes a tape 5. With this tape 5, the laminate 34 is integrated to form an integrated electrode body 3.
　テープ５の基材は、ポリプロピレン、ポリエチレンテレフタレート、ポリイミド等であってもよい。粘着性テープの場合は、粘着剤は、耐電解質性を有するアクリル、シリコーン、ゴム系等で構成されていてもよい。もっとも、本発明において、正極、セパレータ及び負極を一体化する方法は、特に限定されない。例えば、正極とセパレータとが接着されており、セパレータと負極とが接着されていることにより電極体３が一体化されていてもよい。 The base material of the tape 5 may be polypropylene, polyethylene terephthalate, polyimide, or the like. In the case of the pressure-sensitive adhesive tape, the pressure-sensitive adhesive may be composed of acrylic, silicone, rubber-based, etc. having electrolyte resistance. However, in the present invention, the method for integrating the positive electrode, the separator and the negative electrode is not particularly limited. For example, the positive electrode and the separator may be bonded, and the electrode body 3 may be integrated by bonding the separator and the negative electrode.
　なお、本実施形態では、テープ５は、第１のテープ５１と、第２のテープ５２とを有する。第１のテープ５１は、積層体３４のＷ１側に設けられている。第１のテープ５１は、積層体３４の幅方向Ｗにおける一方側（Ｗ１側）側面を経由して、積層体３４の第１の主面３ａと、第２の主面３ｂとに跨がって設けられている。この第１のテープ５１によりセパレータ３３のＷ１側端部が厚み方向ＴのＴ１側に向かって屈曲した状態で固定されている。 In the present embodiment, the tape 5 includes a first tape 51 and a second tape 52. The first tape 51 is provided on the W1 side of the stacked body 34. The first tape 51 straddles the first main surface 3a and the second main surface 3b of the stacked body 34 via one side (W1 side) side surface in the width direction W of the stacked body 34. Is provided. The first tape 51 fixes the W1 side end of the separator 33 in a state bent toward the T1 side in the thickness direction T.
　第２のテープ５２は、積層体３４のＷ２側に設けられている。第２のテープ５２は、電極体３の幅方向Ｗにおける他方側（Ｗ２側）側面を経由して、積層体３４の第１の主面３ａと、第２の主面３ｂとに跨がって設けられている。この第２のテープ５２によりセパレータ３３のＷ２側端部が厚み方向ＴのＴ１側に向かって屈曲した状態で固定されている。 The second tape 52 is provided on the W2 side of the laminated body 34. The second tape 52 straddles the first main surface 3a and the second main surface 3b of the laminate 34 via the other side (W2 side) side surface in the width direction W of the electrode body 3. Is provided. The second tape 52 fixes the W2 side end of the separator 33 in a state bent toward the T1 side in the thickness direction T.
　なお、本実施形態では、テープ５により電極体３を一体化している例について説明した。但し、本発明は、この構成に限定されない。例えば、隣り合う正極及びセパレータとが接着されており、かつ、隣り合う負極及びセパレータとが接着されることにより電極体３が一体化されていてもよい。 In this embodiment, the example in which the electrode body 3 is integrated with the tape 5 has been described. However, the present invention is not limited to this configuration. For example, the adjacent positive electrode and separator may be bonded together, and the electrode body 3 may be integrated by bonding the adjacent negative electrode and separator.
　なお、蓄電デバイス１では、ケース２と電極体３の最外層に位置する電極とが同電位であることが好ましい。ケース２と電極体３の最外層に位置する電極とが接触した場合であっても短絡が生じないためである。 In the electricity storage device 1, it is preferable that the case 2 and the electrode located in the outermost layer of the electrode body 3 have the same potential. This is because a short circuit does not occur even when the case 2 and the electrode located in the outermost layer of the electrode body 3 are in contact with each other.
　ケース２内には、電解質４が充填されている。電極体３は、電解質４を含浸している。電解質４の種類は、特に限定されない。蓄電デバイス１に要求される特性や正極３１、負極３２等に応じて適宜選択することができる。 The case 2 is filled with an electrolyte 4. The electrode body 3 is impregnated with the electrolyte 4. The type of the electrolyte 4 is not particularly limited. It can be appropriately selected according to the characteristics required for the electricity storage device 1, the positive electrode 31, the negative electrode 32, and the like.
　図３に示すように、厚み方向Ｔにおいて、電極体３とケース２との間には、スペーサ６ａ、６ｂが設けられている。このスペーサ６ａ、６ｂにより電極体３がケース２内で変位することが抑制されている。 As shown in FIG. 3, spacers 6 a and 6 b are provided between the electrode body 3 and the case 2 in the thickness direction T. The spacers 6 a and 6 b suppress the displacement of the electrode body 3 in the case 2.
　スペーサ６ａ、６ｂは、電解質と反応しない材料からなるものであれば特に限定されない。スペーサ６ａ、６ｂは、例えば、セパレータ３３と同じ材料により構成されていてもよい。スペーサ６ａ、６ｂをセパレータと同じ材料により構成することにより、スペーサ６ａ、６ｂが電解質により膨潤し、電極体３がケース２に対してより強固に固定される。 The spacers 6a and 6b are not particularly limited as long as they are made of a material that does not react with the electrolyte. The spacers 6a and 6b may be made of the same material as the separator 33, for example. By configuring the spacers 6 a and 6 b with the same material as the separator, the spacers 6 a and 6 b are swollen by the electrolyte, and the electrode body 3 is more firmly fixed to the case 2.
　正極３１及び負極３２等の電極では、集電体の片面の上に活物質層が設けられていてもよいし、集電体の両面の上に活物質層が設けられていてもよい。蓄電デバイス１を薄型化する観点からは、負極集電体の片面の上に負極活物質層が設けられていることが好ましい。 In the electrodes such as the positive electrode 31 and the negative electrode 32, an active material layer may be provided on one surface of the current collector, or an active material layer may be provided on both surfaces of the current collector. From the viewpoint of reducing the thickness of the electricity storage device 1, it is preferable that a negative electrode active material layer is provided on one surface of the negative electrode current collector.
　（蓄電デバイス１の製造方法）
　まず、ケース本体２Ａ、蓋２Ｂ及び電極体３を用意する。 (Method for manufacturing power storage device 1)
First, the case body 2A, the lid 2B, and the electrode body 3 are prepared.
　次に、蓋２Ｂに設けられた第１及び第２の端子４１，４２のうちの一方と、電極体３の正極３１とを接続すると共に、他方と負極３２とを接続する。これにより、蓋２Ｂと電極体３とを接続する。 Next, one of the first and second terminals 41 and 42 provided on the lid 2B is connected to the positive electrode 31 of the electrode body 3, and the other is connected to the negative electrode 32. Thereby, the lid 2 </ b> B and the electrode body 3 are connected.
　次に、図４に示すように、蓋２Ｂが接続された電極体３をケース本体２Ａ内に挿入し、その状態で蓋２Ｂとケース本体２Ａとを溶接することにより接合する。 Next, as shown in FIG. 4, the electrode body 3 to which the lid 2B is connected is inserted into the case body 2A, and in this state, the lid 2B and the case body 2A are welded together.
　次に、蓋２Ｂに設けられた注入口６１から電解質を注入する。その後、注入口６１を封止する。 Next, an electrolyte is injected from the inlet 61 provided in the lid 2B. Thereafter, the inlet 61 is sealed.
　以上の工程により蓄電デバイス１を製造することができる。 The electrical storage device 1 can be manufactured through the above steps.
　以上説明したように、蓄電デバイス１では、蓋２Ｂに第１及び第２の端子４１，４２が設けられており、その第１及び第２の端子４１，４２が電極体３と接続されている。かつ、ケース本体２Ａの、切欠部２ａを構成している側面と対向する側面が開口２Ａ１となっている。このため、ケース本体２Ａの平面視形状が非矩形状である本実施形態においても、蓋２Ｂに接続された電極体３を非矩形状のケース本体２Ａ内に容易に挿入することができる。従って、蓄電デバイス１は、製造が容易である。 As described above, in the electricity storage device 1, the lid 2 </ b> B is provided with the first and second terminals 41 and 42, and the first and second terminals 41 and 42 are connected to the electrode body 3. . In addition, the side surface of the case body 2A that faces the side surface that forms the notch 2a is the opening 2A1. For this reason, also in this embodiment in which the plan view shape of the case main body 2A is a non-rectangular shape, the electrode body 3 connected to the lid 2B can be easily inserted into the non-rectangular case main body 2A. Therefore, the electricity storage device 1 is easy to manufacture.
　また、ケース本体２Ａに開口がひとつのみ設けられているため、ケース本体２Ａと蓋２Ｂとの溶接長を短くすることができる。よって、蓄電デバイス１の製造がより容易である。さらに、開口２Ａ１及び蓋２Ｂが矩形状であるため、蓋２Ｂとケース本体２Ａとの溶接が容易である。従って、蓄電デバイス１の製造がさらに容易である。 Further, since only one opening is provided in the case main body 2A, the welding length between the case main body 2A and the lid 2B can be shortened. Therefore, manufacture of the electrical storage device 1 is easier. Furthermore, since the opening 2A1 and the lid 2B are rectangular, the lid 2B and the case body 2A can be easily welded. Therefore, it is easier to manufacture the electricity storage device 1.
　（第２及び第３の実施形態）
　図５は、第２の実施形態に係る蓄電デバイス１ａの模式的平面図である。図６は、第２の実施形態に係る蓄電デバイス１ｂの模式的平面図である。 (Second and third embodiments)
FIG. 5 is a schematic plan view of an electricity storage device 1a according to the second embodiment. FIG. 6 is a schematic plan view of an electricity storage device 1b according to the second embodiment.
　第１の実施形態では、ケース本体の平面視形状が略Ｌ字状である例について説明した。但し、本発明はこの構成に限定されない。例えば、図５に示すように、ケース本体２Ａは、長さ方向Ｌに沿って延びる側壁部２８の長さ方向Ｌの中央部に切欠部２ａが設けられた形状を有していてもよい。すなわち、ケース本体２Ａの平面視形状が、略Ｕの字状であってもよい。 In the first embodiment, an example in which the shape of the case body in plan view is substantially L-shaped has been described. However, the present invention is not limited to this configuration. For example, as shown in FIG. 5, the case main body 2 </ b> A may have a shape in which a notch 2 a is provided at the center in the length direction L of the side wall 28 extending along the length direction L. That is, the planar view shape of the case main body 2A may be a substantially U-shape.
　第２の実施形態に係る蓄電デバイス１ａでは、ケース本体２Ａの、側壁部２８により構成された側面と対向している側面に開口が設けられており、その開口に蓋２Ｂが溶接されている。従って、第１の実施形態に係る蓄電デバイス１と同様に、本実施形態に係る蓄電デバイス１ａも製造が容易である。 In the electricity storage device 1a according to the second embodiment, an opening is provided on the side surface of the case body 2A facing the side surface formed by the side wall portion 28, and the lid 2B is welded to the opening. Therefore, similarly to the electricity storage device 1 according to the first embodiment, the electricity storage device 1a according to the present embodiment is easy to manufacture.
　また、例えば、図６に示すように、ケース本体２Ａは、長さ方向Ｌに沿って延びる側壁部２９の長さ方向Ｌの両端に切欠部２ａが設けられていてもよい。すなわち、ケース本体２Ａの平面視形状は、略Ｔの字状であってもよい。 For example, as shown in FIG. 6, the case body 2 </ b> A may be provided with notches 2 a at both ends in the length direction L of the side wall portion 29 extending along the length direction L. That is, the shape of the case main body 2A in plan view may be a substantially T-shape.
　第３の実施形態に係る蓄電デバイス１ｂでは、ケース本体２Ａの、側壁部２９により構成された側面と対向している側面に開口が設けられており、その開口に蓋２Ｂが溶接されている。従って、第１及び第２の実施形態に係る蓄電デバイス１と同様に、本実施形態に係る蓄電デバイス１ａも製造が容易である。 In the electricity storage device 1b according to the third embodiment, an opening is provided on the side surface of the case body 2A facing the side surface formed by the side wall portion 29, and the lid 2B is welded to the opening. Therefore, similarly to the power storage device 1 according to the first and second embodiments, the power storage device 1a according to the present embodiment is easy to manufacture.
１、１ａ、１ｂ　　　　：蓄電デバイス
２　　　　：ケース
２Ａ　　　：ケース本体
２Ａ１　　：開口
２Ｂ　　　：蓋
２ａ　　　：切欠部
３　　　　：電極体
３ａ　　　：第１の主面
３ｂ　　　：第２の主面
４　　　　：電解質
５　　　　：テープ
６ａ　　　：スペーサ
２１　　　：第１の主壁部
２２　　　：第２の主壁部
２３　　　：第１の側壁部
２４　　　：第２の側壁部
２５　　　：第３の側壁部
２６　　　：第４の側壁部
２７　　　：第５の側壁部
２８、２９　　　：側壁部
３１　　　：正極
３２　　　：負極
３３　　　：セパレータ
３３ａ　　：袋状セパレータ
３４　　　：積層体
４１　　　：第１の端子
４２　　　：第２の端子
５１　　　：第１のテープ
５２　　　：第２のテープ
６１　　　：注入口 DESCRIPTION OF SYMBOLS 1, 1a, 1b: Power storage device 2: Case 2A: Case main body 2A1: Opening 2B: Lid 2a: Notch part 3: Electrode body 3a: First main surface 3b: Second main surface 4: Electrolyte 5: Tape 6a : Spacer 21: 1st main wall part 22: 2nd main wall part 23: 1st side wall part 24: 2nd side wall part 25: 3rd side wall part 26: 4th side wall part 27: 5th Side wall portions 28 and 29: Side wall portion 31: Positive electrode 32: Negative electrode 33: Separator 33a: Bag-shaped separator 34: Laminate body 41: First terminal 42: Second terminal 51: First tape 52: Second Tape 61: Injection port

Claims (4)

  1. 　平面視形状が切欠部を有する矩形状であり、少なくとも一の側面が開口しているケース本体と、前記少なくとも一の側面の開口を閉鎖する前記蓋と備えるケースと、
    　前記蓋に設けられた第１の端子と、
    　前記蓋に設けられた第２の端子と、
    　前記第１の端子に接続された第１の電極と、前記第２の端子に接続された第２の電極と、前記第１の電極と前記第２の電極との間に配されたセパレータとを有し、一体化された電極体と、
    　前記ケース内に充填された電解質と、
    　を備え、
    　前記少なくとも一の側面が前記切欠部を構成している側面と対向する側面を含み、
    　前記蓋に接続された前記電極体が前記ケース本体内に挿入された状態で前記蓋と前記ケース本体とが溶接されている、蓄電デバイス。     A case having a rectangular shape having a notch portion in plan view, a case body having at least one side surface opened, and the lid for closing the opening on the at least one side surface;
    A first terminal provided on the lid;
    A second terminal provided on the lid;
    A first electrode connected to the first terminal; a second electrode connected to the second terminal; and a separator disposed between the first electrode and the second electrode; And an integrated electrode body,
    An electrolyte filled in the case;
    With
    The at least one side surface includes a side surface opposite to the side surface forming the notch,
    The electricity storage device, wherein the lid and the case main body are welded in a state where the electrode body connected to the lid is inserted into the case main body.
  2. 　前記少なくとも一の側面が、前記切欠部を構成している側面と対向するひとつの側面により構成されている、請求項１に記載の蓄電デバイス。 The electric storage device according to claim 1, wherein the at least one side surface is constituted by one side surface facing the side surface constituting the notch.
  3. 　前記開口が矩形である、請求項１又は２に記載の蓄電デバイス。 The electric storage device according to claim 1 or 2, wherein the opening is rectangular.
  4. 　前記蓋は、前記電解質注入用の注入口を有する、請求項１～３のいずれか一項に記載の蓄電デバイス。
          The electricity storage device according to any one of claims 1 to 3, wherein the lid has an inlet for injecting the electrolyte.
PCT/JP2017/024607 2016-09-20 2017-07-05 Power storage device WO2018055875A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019039334A1 (en) * 2017-08-24 2019-02-28 株式会社村田製作所 Electricity storage device
DE102018218213A1 (en) * 2018-10-24 2020-04-30 Robert Bosch Gmbh Battery cell and battery module
US11830672B2 (en) 2016-11-23 2023-11-28 KYOCERA AVX Components Corporation Ultracapacitor for use in a solder reflow process

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012114272A (en) * 2010-11-25 2012-06-14 Ud Trucks Corp Power storage cell
JP2012114066A (en) * 2010-11-02 2012-06-14 Sharp Corp Secondary battery
JP2013097980A (en) * 2011-10-31 2013-05-20 Toyota Motor Corp Nonaqueous electrolyte secondary battery and manufacturing method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012114066A (en) * 2010-11-02 2012-06-14 Sharp Corp Secondary battery
JP2012114272A (en) * 2010-11-25 2012-06-14 Ud Trucks Corp Power storage cell
JP2013097980A (en) * 2011-10-31 2013-05-20 Toyota Motor Corp Nonaqueous electrolyte secondary battery and manufacturing method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11830672B2 (en) 2016-11-23 2023-11-28 KYOCERA AVX Components Corporation Ultracapacitor for use in a solder reflow process
WO2019039334A1 (en) * 2017-08-24 2019-02-28 株式会社村田製作所 Electricity storage device
DE102018218213A1 (en) * 2018-10-24 2020-04-30 Robert Bosch Gmbh Battery cell and battery module

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