WO2018055875A1 - Dispositif de stockage d'énergie - Google Patents

Dispositif de stockage d'énergie 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
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
storage device
lid
case
electricity storage
Prior art date
Application number
PCT/JP2017/024607
Other languages
English (en)
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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/fr

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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

L'invention concerne un dispositif de stockage d'énergie, qui n'est pas rectangulaire dans une vue en plan et qui peut être facilement produit à faible coût. Un boîtier 2 a une forme rectangulaire ayant une encoche 2a dans une vue en plan. Le boîtier 2 comprend un corps de boîtier 2A et un couvercle 2B. Au moins une surface latérale du corps de boîtier 2A a une ouverture, et l'ouverture est fermée par le couvercle 2B. Des bornes 41, 42 sont prévues sur le couvercle 2B. Un élément d'électrode 3 comprend une première électrode 31, une seconde électrode 32 et un séparateur 33. La première électrode 31 est connectée à la première borne 41. La seconde électrode 32 est connectée au seconde borne 42. L'élément d'électrode 3 est intégré. L'au moins une surface latérale comprend une surface latérale faisant face à la surface latérale constituant l'encoche 2a. Le couvercle et le corps de boîtier sont soudés l'un à l'autre, l'élément d'électrode qui est relié au couvercle étant inséré dans le corps de boîtier.
PCT/JP2017/024607 2016-09-20 2017-07-05 Dispositif de stockage d'énergie WO2018055875A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-183552 2016-09-20
JP2016183552 2016-09-20

Publications (1)

Publication Number Publication Date
WO2018055875A1 true WO2018055875A1 (fr) 2018-03-29

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019039334A1 (fr) * 2017-08-24 2019-02-28 株式会社村田製作所 Dispositif de stockage d'électricité
DE102018218213A1 (de) * 2018-10-24 2020-04-30 Robert Bosch Gmbh Batteriezelle und Batteriemodul
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
JP2012114066A (ja) * 2010-11-02 2012-06-14 Sharp Corp 二次電池
JP2012114272A (ja) * 2010-11-25 2012-06-14 Ud Trucks Corp 蓄電セル
JP2013097980A (ja) * 2011-10-31 2013-05-20 Toyota Motor Corp 非水電解液二次電池、及び、その製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012114066A (ja) * 2010-11-02 2012-06-14 Sharp Corp 二次電池
JP2012114272A (ja) * 2010-11-25 2012-06-14 Ud Trucks Corp 蓄電セル
JP2013097980A (ja) * 2011-10-31 2013-05-20 Toyota Motor Corp 非水電解液二次電池、及び、その製造方法

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 (fr) * 2017-08-24 2019-02-28 株式会社村田製作所 Dispositif de stockage d'électricité
DE102018218213A1 (de) * 2018-10-24 2020-04-30 Robert Bosch Gmbh Batteriezelle und Batteriemodul

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