WO2016009786A1 - Dispositif de stockage d'électricité - Google Patents

Dispositif de stockage d'électricité Download PDF

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Publication number
WO2016009786A1
WO2016009786A1 PCT/JP2015/067888 JP2015067888W WO2016009786A1 WO 2016009786 A1 WO2016009786 A1 WO 2016009786A1 JP 2015067888 W JP2015067888 W JP 2015067888W WO 2016009786 A1 WO2016009786 A1 WO 2016009786A1
Authority
WO
WIPO (PCT)
Prior art keywords
case
electrode terminal
threaded portion
bus bar
outer peripheral
Prior art date
Application number
PCT/JP2015/067888
Other languages
English (en)
Japanese (ja)
Inventor
寛恭 西原
元章 奥田
Original Assignee
株式会社 豊田自動織機
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 豊田自動織機 filed Critical 株式会社 豊田自動織機
Publication of WO2016009786A1 publication Critical patent/WO2016009786A1/fr

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Classifications

    • 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
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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

Definitions

  • the present invention relates to a power storage device having an electrode terminal.
  • the secondary battery described in Patent Document 1 includes an electrode assembly housed in a case and an electrode terminal electrically connected to the electrode assembly.
  • the electrode terminal protrudes from the inside of the case toward the outside through a through hole provided in the lid of the case.
  • the secondary battery is electrically connected by the bus bar by bringing the bus bar into contact with the end face of the tip of the electrode terminal and electrically connecting the electrode terminal and the bus bar.
  • a thread portion is formed on the outer peripheral surface of the electrode terminal.
  • a nut is screwed onto the screw portion of the electrode terminal from the outside of the case. Since the screw portion is formed at a portion including the tip in the axial direction of the electrode terminal, deformation or burring or the like occurs on the end surface of the tip of the electrode terminal due to processing of the screw portion, and the plane of the bus bar contact surface located on the end surface The degree may decrease.
  • An object of the present invention is to provide a power storage device that can suppress a decrease in flatness of a bus bar contact surface with processing of a threaded portion in an electrode terminal.
  • the power storage device that solves the above problems includes a plurality of positive electrodes, a plurality of negative electrodes, and a plurality of separators, and the positive electrode electrodes and the negative electrode electrodes are alternately stacked via the separators;
  • the front end has an outer peripheral surface
  • the front end has an end surface including a bus bar contact surface with which the bus bar can contact, and the outer peripheral surface is screwed with a nut from the outside of the case.
  • the outer peripheral surface is in a range between the distal end and a predetermined position away from the distal end toward the base end in the axial direction of the electrode terminal. Part And a non-threaded portion which is not made.
  • the perspective view which shows a part of battery module in one Embodiment The perspective view which shows the external appearance of the secondary battery of FIG. Sectional drawing which expands and shows the positive electrode terminal in the secondary battery of FIG. The enlarged view which expands and shows the part enclosed by the circle
  • a battery module 10 is configured by connecting adjacent secondary batteries 20 by a bus bar 11.
  • the bus bar 11 has a flat plate shape and is fixed to each secondary battery 20 by a bolt 12.
  • each power storage device that is, the secondary battery 20 includes a case 21 and an electrode assembly 22 accommodated in the case 21.
  • the electrode assembly 22 includes a plurality of positive electrodes, a plurality of negative electrodes, and a plurality of separators, and the positive electrodes and the negative electrodes are alternately stacked via the separators.
  • Each positive electrode has a positive electrode active material layer
  • each negative electrode has a negative electrode active material layer.
  • the case 21 contains an electrolyte solution together with the electrode assembly 22.
  • the case 21 includes a cylindrical case body 23 having a bottom and an opening, and a flat lid 24 that closes the opening.
  • the electrode assembly 22 is inserted into the case main body 23 through the opening. Both the case main body 23 and the lid body 24 are made of metal (for example, made of stainless steel or aluminum).
  • the secondary battery 20 of this embodiment is a lithium ion battery.
  • Two electrode terminals that is, a negative electrode terminal 26 and a positive electrode terminal 27 are electrically connected to the electrode assembly 22.
  • the terminals 26 and 27 will be described with reference to FIGS. 3A and 3B.
  • the configuration of the positive electrode terminal 27 will be described.
  • the negative electrode terminal 26 has the same configuration as the positive electrode terminal 27, the description of the negative electrode terminal 26 is omitted.
  • the positive electrode terminal 27 includes a plate-like base portion 31 located in the case 21 and a cylindrical pole column portion 32 that extends from the center of the base portion 31 in a direction orthogonal to the lid body 24. is doing.
  • the pole portion 32 extends from the base portion 31 toward the outside of the case 21.
  • the pole portion 32 protrudes outside the case 21 through the through hole 25 provided in the wall portion of the case 21, that is, the lid body 24.
  • a portion of the pole column portion 32 that protrudes to the outside of the case 21 is referred to as a “protruding portion”.
  • An insulating ring 28 for insulating the positive electrode terminal 27 from the case 21 is disposed between the inner peripheral surface of the through hole 25 and the outer peripheral surface of the pole column portion 32 in the lid body 24.
  • the pole column portion 32 has a threaded portion, that is, a male threaded portion 33 on the outer peripheral surface.
  • the pole portion 32 (specifically, the protruding portion) includes a base end 32a located on the base 31 side in the axial direction, and an end on the opposite side of the base end 32a, that is, a tip 32b protruding outside the case 21. And have.
  • the tip 32b has a tip surface 32c.
  • the male screw portion 33 has a base end from a predetermined position that is a predetermined distance away from the tip 32b to the base end 32a in the range from the tip 32b to the base end 32a of the pole column portion 32. It is formed in a range up to 32a.
  • the non-threaded portion 33a where the male threaded portion 33 is not formed is located in the range from the tip 32b to the predetermined position on the outer peripheral surface of the pole column portion 32.
  • the predetermined distance and the predetermined position are respectively set to a distance and a position at which the influence of deformation, burrs, and the like caused by processing of the male screw portion 33 does not reach the distal end surface 32c of the pole column portion 32.
  • the positive terminal 27 is fixed to the case 21 by screwing the nut 40 from the outside of the case 21 to the male screw portion 33 of the pole column portion 32.
  • the non-threaded portion 33 a in the present embodiment is located on the outer peripheral surface of the portion of the pole column portion 32 that protrudes from the nut 40 outside the case 21. Further, the outer diameter of the non-threaded portion 33 a has the same size as the inner diameter of the nut 40, that is, the size that can be inserted into the nut 40. Further, the outer diameter of the non-threaded portion 33 a is constant along the axial direction of the positive electrode terminal 27.
  • the front end surface 32 c of the polar column part 32 is orthogonal to the axial direction of the polar column part 32.
  • the pole column portion 32 has an insertion hole 34 extending from the distal end surface 32 c toward the base portion 31.
  • the insertion hole 34 is a hexagonal engagement hole 35 that opens to the distal end surface 32 c of the pole column part 32, a screw hole 36 that is positioned closer to the base 31 than the engagement hole 35 and communicates with the engagement hole 35, It has.
  • a hexagonal columnar jig is inserted into the engagement hole 35 so that the pole column 32 does not rotate with the nut 40 when the nut 40 is screwed into the pole column 32.
  • the screw hole 36 has an internal thread on the inner peripheral surface.
  • the bolt 12 penetrates the bus bar 11 and is screwed into the screw hole 36 in a state where the bus bar 11 and the tip end surface 32 c of the pole column portion 32 are in surface contact. That is, a portion of the tip end surface 32 c of the pole column portion 32 excluding the opening of the engagement hole 35 functions as a bus bar contact surface that contacts the bus bar 11.
  • the non-threaded portion 33a is located in the range from the distal end 32b to a predetermined position in the range from the distal end 32b to the proximal end 32a of the pole column portion 32 of each terminal 26, 27. For this reason, the processing of the male thread portion 33 on the pole column portion 32 is first performed from a predetermined position that is a predetermined distance away from the distal end 32b toward the proximal end 32a. Therefore, it is possible to suppress the influence of deformation, burrs, and the like caused by processing on the tip surface 32c existing at a position separating the non-threaded portion 33a from the male screw portion 33, and the flatness of the tip surface 32c is reduced. Can be suppressed.
  • the bus bar 11 When adjacent secondary batteries 20 are connected to each other by the bus bar 11, the bus bar 11 is placed on the front end surface 32 c of the negative electrode terminal 26 of one secondary battery 20 and the front end surface 32 c of the positive electrode terminal 27 of the other secondary battery 20. Then, the bolts 12 are screwed into the screw holes 36 of both terminals 26 and 27, respectively. Thereby, the bus bar 11 is fixed to the terminals 26 and 27 in surface contact with the distal end surfaces 32 c of the terminals 26 and 27.
  • the non-screw part 33a is located in the range from the front-end
  • FIG. Therefore, the contact area between the terminals 26 and 27 and the bus bar 11 can be increased as compared with the case where the male screw portion 33 is formed in the portion including the tip 32 b in the pole column portion 32.
  • the outer diameter of the non-threaded portion 33a is constant along the axial direction of the pole column portion 32. For this reason, the non-screw part 33a can be positioned in the pole column part 32, maintaining the area of the front end surface 32c in the pole column part 32 as large as the cross-sectional area of the pole column part 32 in a predetermined position.
  • each of the terminals 26 and 27 has the insertion hole 34 inside the pole column portion 32, the thickness in the direction (radial direction) perpendicular to the axial direction of the pole column portion 32 is small. For this reason, the polar column portion 32 is relatively easily deformed with the processing of the male screw portion 33, and the flatness of the distal end surface 32c is also likely to be relatively lowered.
  • the non-threaded portion 33a exists in the polar column portion 32, even if the polar column portion 32 has a configuration in which the flatness of the distal end surface 32c tends to be reduced, the distal end surface 32c. The reduction in flatness can be suppressed.
  • the positive electrode terminal 27 uses aluminum or the like as a base material, and the surface of the base material of the terminal 27 may be plated with nickel or the like for the purpose of rust prevention.
  • the distal end surface 32c of the pole column portion 32 can be improved as compared with the case where the male screw portion 33 is formed in a portion including the distal end 32b of the positive electrode terminal 27, the distal end surface 32c is moved to. Therefore, the cost required for the plating process on the positive electrode terminal 27 can be reduced.
  • the said embodiment can also be implemented with the following forms which changed this suitably.
  • ⁇ In a state where the nut 40 is screwed into the male threaded portion 33 of the pole column portion 32, a part or all of the non-threaded portion 33a is located on the outer peripheral surface of the portion of the pole column portion 32 located inside the nut 40. May be.
  • the non-threaded portion 33a may at least partially overlap the nut 40 in a state where the nut 40 is screwed into the male threaded portion 33.
  • the clearance gap between the nut 40 and the bus-bar 11 can be made small, and, thereby, the secondary battery 20. Can be reduced in size.
  • the shape of the portion corresponding to the non-threaded portion 33a in the pole column portion 32 is not limited to a cylindrical shape, and may be, for example, a rectangular cylindrical shape.
  • the outer diameter of the non-threaded portion 33 a may not be constant along the axial direction of the pole column portion 32.
  • the outer diameter of the non-threaded portion 33a changes so that the cross-sectional area of the pole column portion 32 in the portion corresponding to the non-threaded portion 33a increases from the distal end 32b of the polar column portion 32 toward the proximal end 32a. Also good.
  • both the negative electrode terminal 26 and the positive electrode terminal 27 have the non-threaded portion 33a in the pole column portion 32, but only one of the negative electrode terminal 26 and the positive electrode terminal 27 is
  • the column part 32 may have a non-threaded part 33a.
  • the negative electrode terminal 26 and the positive electrode terminal 27 may protrude from the wall portion of the case 21 other than the lid 24, that is, from the wall portion of the case main body 23.
  • the secondary battery 20 is a lithium ion secondary battery, but is not limited thereto, and may be another secondary battery. In short, any secondary battery that transfers ions while transferring ions between the positive electrode active material layer and the negative electrode active material layer may be used.
  • the power storage device of the present invention may be a power storage device such as an electric double layer capacitor.

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

Abstract

L'invention concerne un dispositif de stockage d'électricité qui est muni d'un ensemble d'électrodes, d'un boîtier, et de bornes d'électrode. L'ensemble d'électrodes comporte une pluralité d'électrodes à polarité positive, une pluralité d'électrodes à polarité négative, et une pluralité de séparateurs, les électrodes à polarité positive ainsi que les électrodes à polarité négative étant empilées de manière alternée, chaque fois avec un séparateur entre elles. L'ensemble d'électrodes est logé dans le boîtier, et les bornes d'électrode sont connectées électriquement à l'ensemble d'électrodes et font saillie vers l'extérieur à partir d'une partie de paroi du boîtier. Chacune des bornes d'électrode a une extrémité avant et une extrémité de base dans sa direction axiale, et une surface périphérique externe. L'extrémité avant présente une face d'extrémité comprenant une surface de contact de barre omnibus avec laquelle une barre omnibus peut établir un contact, et la surface périphérique externe a une partie filetée sur laquelle un écrou peut être vissé depuis le côté extérieur du boîtier. La surface périphérique externe a une partie non filetée dans laquelle aucune partie filetée n'a été formée dans la zone entre l'extrémité avant et une position prédéterminée qui est à une certaine distance en s'éloignant de ladite extrémité avant vers l'extrémité de base dans la direction axiale de la borne d'électrode.
PCT/JP2015/067888 2014-07-16 2015-06-22 Dispositif de stockage d'électricité WO2016009786A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014145683A JP5928536B2 (ja) 2014-07-16 2014-07-16 蓄電装置
JP2014-145683 2014-07-16

Publications (1)

Publication Number Publication Date
WO2016009786A1 true WO2016009786A1 (fr) 2016-01-21

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ID=55078287

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Application Number Title Priority Date Filing Date
PCT/JP2015/067888 WO2016009786A1 (fr) 2014-07-16 2015-06-22 Dispositif de stockage d'électricité

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JP (1) JP5928536B2 (fr)
WO (1) WO2016009786A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190006126A1 (en) * 2017-06-30 2019-01-03 Avx Corporation Interconnect Strip for an Ultracapacitor Module
WO2023179866A1 (fr) 2022-03-24 2023-09-28 Sorbonne Universite Rupture transitoire de la barrière neurovasculaire d'un être humain et ses utilisations pour le traitement de la sclérose latérale amyotrophique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102035011B1 (ko) * 2018-04-19 2019-10-22 한국단자공업 주식회사 자동차용 블럭의 부품 고정장치
JP7478514B2 (ja) * 2019-03-13 2024-05-07 株式会社Ｇｓユアサ 蓄電装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003197176A (ja) * 2001-12-28 2003-07-11 Yuasa Corp 電 池
JP2006324178A (ja) * 2005-05-20 2006-11-30 Kyushu Electric Power Co Inc 二次電池
JP2008071733A (ja) * 2006-09-11 2008-03-27 Samsung Sdi Co Ltd 電池モジュール

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI450432B (zh) * 2011-03-29 2014-08-21 Ind Tech Res Inst 電池端蓋組
JP2014102898A (ja) * 2012-11-16 2014-06-05 Toyota Industries Corp 蓄電装置
JP5761394B2 (ja) * 2014-01-30 2015-08-12 株式会社豊田自動織機 電極端子、蓄電装置及び蓄電モジュール

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003197176A (ja) * 2001-12-28 2003-07-11 Yuasa Corp 電 池
JP2006324178A (ja) * 2005-05-20 2006-11-30 Kyushu Electric Power Co Inc 二次電池
JP2008071733A (ja) * 2006-09-11 2008-03-27 Samsung Sdi Co Ltd 電池モジュール

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190006126A1 (en) * 2017-06-30 2019-01-03 Avx Corporation Interconnect Strip for an Ultracapacitor Module
WO2023179866A1 (fr) 2022-03-24 2023-09-28 Sorbonne Universite Rupture transitoire de la barrière neurovasculaire d'un être humain et ses utilisations pour le traitement de la sclérose latérale amyotrophique

Also Published As

Publication number Publication date
JP5928536B2 (ja) 2016-06-01
JP2016024844A (ja) 2016-02-08

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