WO2014054734A1 - Batterie secondaire - Google Patents

Batterie secondaire Download PDF

Info

Publication number
WO2014054734A1
WO2014054734A1 PCT/JP2013/076945 JP2013076945W WO2014054734A1 WO 2014054734 A1 WO2014054734 A1 WO 2014054734A1 JP 2013076945 W JP2013076945 W JP 2013076945W WO 2014054734 A1 WO2014054734 A1 WO 2014054734A1
Authority
WO
WIPO (PCT)
Prior art keywords
nut
positive electrode
bolt
secondary battery
wall surface
Prior art date
Application number
PCT/JP2013/076945
Other languages
English (en)
Japanese (ja)
Inventor
雄輔 内田
Original Assignee
新神戸電機株式会社
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 新神戸電機株式会社 filed Critical 新神戸電機株式会社
Priority to JP2014539815A priority Critical patent/JPWO2014054734A1/ja
Publication of WO2014054734A1 publication Critical patent/WO2014054734A1/fr

Links

Images

Classifications

    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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
    • 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
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/591—Covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/002—Measures against loss of bolts, nuts or pins
    • 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
    • H01M10/052—Li-accumulators
    • 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 secondary battery in which connecting means for connecting an electrode plate group and a terminal structure part is fastened to the terminal structure part using a fastening structure using bolts or bolts and nuts.
  • Patent Document 1 a plurality of tabs of electrode plates are welded to L-shaped current collecting leads (current collecting plates), and the plurality of current collecting leads are tabbed. It is disclosed that parts to be welded are extended in parallel at a predetermined interval, and base portions of a plurality of current collecting leads are overlapped and fixed to a connection portion of an electrode terminal by bolts and welding.
  • An object of the present invention is to provide a secondary battery that prevents the nut or bolt from dropping and does not cause a short circuit with the battery container even when the nut or bolt of the fastening structure is loosened without using welding. There is to do.
  • a secondary battery to be improved by the present invention is an electrode plate group composed of a plurality of electrode plates and a separator, a conductive battery container that houses the electrode plate group, and an outside of the battery container. Terminal portion, terminal body portion electrically connected to electrode plate group, and connection means for connecting terminal body portion and electrode plate group to terminal body portion using bolts or bolts and nuts And a terminal structure portion having a fastening structure.
  • the dimension of the gap between at least one of the bolt head and nut of the fastening structure and the inner wall surface of the battery container is set to a dimension that can prevent the bolt and nut from falling off.
  • the wall surface portion of the inner wall surface of the battery container facing at least one of the bolt head portion and the nut through the gap, or at least one of the bolt head portion and the nut facing the wall surface portion An electrically insulating material that prevents contact between the wall surface and the bolt head or nut is fixed. According to the present invention, even if the bolt or nut is loosened and approaches the inner wall surface of the battery container, the bolt or nut and the inner wall surface of the battery container are not in direct contact due to the presence of the electrically insulating material. Therefore, it is possible to prevent a short circuit accident from occurring without using welding.
  • the connecting means is a plurality of current collector plates between the plurality of current collector plates to which the plurality of tabs are connected and the terminal body portion. It can comprise from the pressing member which pinches
  • the electrical insulating material preferably has a cap shape fitted to the head or nut of the bolt.
  • a cap-shaped electrical insulating material is easy to mount and highly versatile.
  • the nut may be a single nut or a double nut, but when a double nut is used, it is preferable that the electrically insulating material has a cap shape tightly fitted to both the double nut. . When an electrically insulating material fitted to both of the double nuts is used, the electrically insulating material can suppress the double nut from loosening.
  • the cap-shaped electrical insulating material preferably has a size that occupies most of the gap while being fitted to the head or nut of the bolt. If it does in this way, an electrically insulating raw material will function as a stopper member of a volt
  • the electrical insulating material can be integrally formed of rubber or insulating resin material. And it is preferable to make the fitting recessed part of an electrically insulating material into the cylindrical space which has a diameter dimension slightly smaller than the maximum diameter dimension of a bolt head or a nut. Note that the contour shapes of the bolt head and nut are not limited to a general hexagon. If it does in this way, a fitting operation can be carried out, without worrying about the positional relationship between the electrically insulating material and the head of the bolt or the nut. Even if there is some manufacturing error, this error can be absorbed by the deformation of the deformed electrical insulating material.
  • the electrical insulating material may be in the form of a sheet joined or fixed to the wall surface. Since the sheet-like electrically insulating material is less expensive than the cap-like electrically insulating material, the secondary battery can be manufactured at a low cost.
  • FIG. 1 is a schematic longitudinal cross-sectional view which shows the internal structure of the lithium ion secondary battery of FIG. 1
  • B is a figure for demonstrating the structure of an electrode group.
  • It is a schematic front view which shows an internal structure. It is an enlarged view of the principal part of the internal structure of a lithium ion secondary battery.
  • the positive electrode tab of the positive electrode plate, the positive electrode current collector plate, the positive electrode terminal structure portion and the bolt are shown separately is there.
  • FIG. 1 It is a top view of an insulating member. It is a figure which shows the modification of an insulating member. It is a figure which expands and shows the principal part of the lithium ion secondary battery of the 2nd Embodiment of this invention. It is a figure which expands and shows the principal part of the lithium ion secondary battery of the 3rd Embodiment of this invention. It is a figure which expands and shows the principal part of the lithium ion secondary battery of the 4th Embodiment of this invention. It is a figure which shows the modification of the positive electrode tab channel
  • FIG. 1 is a plan view of the appearance of a lithium ion secondary battery 1 as a non-aqueous electrolyte secondary battery to which an embodiment of the current collecting structure of the present invention is applied.
  • 2A is a schematic longitudinal sectional view showing the internal structure of the lithium ion secondary battery 1
  • FIG. 2B is a view for explaining the configuration of the electrode plate group
  • FIG. 3 shows the internal structure.
  • FIG. 4 is an enlarged view of a main part of the internal structure of the lithium ion secondary battery 1.
  • FIG. 2 in order to explain the shape of a bundle of positive electrode tabs 35a described later, only the positive electrode tabs are shown extending from the electrode plate group.
  • FIG. 3 a positive electrode tab 35a and a negative electrode tab 37a, which will be described later, are conceptually drawn without being bent and curved in a bundle.
  • the lithium ion secondary battery 1 of the present embodiment includes an electrode plate group 3 and a stainless steel square battery container 5 that accommodates the electrode plate group 3 therein.
  • the battery container 5 includes a battery can 7 having one end opened, and a battery lid 9. After the electrode plate group 3 is inserted into the battery can 7, the opening peripheral edge of the battery can 7, and the battery lid It is sealed by welding the peripheral part of 9.
  • an aluminum positive electrode terminal structure 11 and a negative electrode terminal structure 13 are fixed to the battery lid 9.
  • the positive electrode terminal structure portion 11 and the negative electrode terminal structure portion 13 include terminal portions 11a and 13a that pass through the cover plate of the battery lid 9 and project outside the battery container 5, and terminal main body portions 11b that are disposed in the battery container. 13b.
  • An annular inner packing 15 is provided between the positive terminal structure 11 and the negative terminal structure 13 and the battery lid 9.
  • An annular outer packing 17 and a terminal washer 19 are provided on the outer side of the battery lid 9 so as to be opposed to the inner packing 15 via the battery lid 9.
  • the positive electrode terminal structure 11 and the negative electrode terminal structure 13 are connected to the battery by a positive terminal nut 21 and a negative terminal nut 23 provided at the tip of the screw portion via an inner packing 15, an outer packing 17, and a terminal washer 19. Each is fixed to a lid 9. A portion of the battery lid 9 where the positive electrode terminal structure 11 and the negative electrode terminal structure 13 are provided ensures a sealed / sealed state in the battery container 5 by the inner packing 15 and the outer packing 17.
  • the battery lid 9 is provided with a gas discharge valve 9a and a liquid injection port 9b welded with stainless steel foil.
  • the gas discharge valve 9a has a function of cleaving the stainless steel foil and releasing the internal gas when the battery internal pressure increases.
  • a non-aqueous electrolyte is injected from the injection port 9b. After injection of the electrolytic solution, the liquid injection port 9b is sealed with a liquid port stopper.
  • the positive electrode side pressing member 25 and the positive electrode current collector laminated portion 27 are attached to the terminal main body portion 11 b of the positive electrode terminal structure portion 11 by bolts 29.
  • the negative electrode side pressing member 31 and the negative electrode current collector laminated portion 33 are attached to the terminal main body portion 13 b of the negative electrode terminal structure portion 13 by bolts 29.
  • the electrode plate group 3 includes, for example, 320 positive electrode plates 35 and 321 negative electrode plates 37 that are alternately stacked via separators 39, respectively. It is configured.
  • the separator 39 prevents the positive electrode plate 35 and the negative electrode plate 37 from contacting and short-circuiting.
  • the positive electrode plate 35 has a positive electrode current collector made of an aluminum foil formed in a substantially rectangular plate shape, and a positive electrode active material layer provided on both surfaces of the positive electrode current collector.
  • a positive electrode tab 35 a is integrally formed on the side of the positive electrode current collector that extends along the battery lid 9.
  • the positive electrode tabs 35a of the plurality of positive electrode plates 35 have the same elongated shape.
  • the plurality of positive electrode tabs 35a are divided into 16 divided positive electrode tab bundles 36, bent into a predetermined shape, and joined to positive electrode current collector plates 41a to 41h described later by ultrasonic welding or laser welding.
  • the negative electrode plate 37 has a negative electrode current collector made of a copper foil formed in a substantially rectangular plate shape, and negative electrode active material layers provided on both surfaces of the negative electrode current collector. ing.
  • the negative electrode tabs 37a of the plurality of negative electrode plates 37 have the same elongated shape.
  • a negative electrode tab 37 a is integrally formed on the side of the negative electrode current collector that extends along the battery lid 9.
  • the negative electrode tab 37a is formed so as not to face the positive electrode tab 35a when the plurality of positive electrode plates 35 and the plurality of negative electrode plates 37 are laminated.
  • the plurality of negative electrode tabs 37a are divided into 16 divided negative electrode tab bundles 38 in the same manner as the divided positive electrode tab bundle 36 shown in FIG.
  • the negative electrode current collector plates 51a to 51h conceptually shown in FIG. 3 have the same shape as the positive electrode current collector plates 41a to 41h in FIG. 4 as shown in FIG.
  • the bundle 38 is bent similarly to the divided positive electrode tab bundle 36.
  • the separator 39 is formed in a substantially rectangular sheet shape by a porous material through which lithium ions can pass.
  • the separator 39 has a size that can prevent the positive electrode current collector of the positive electrode plate 35 and the negative electrode current collector of the negative electrode plate 37 from contacting each other in a stacked state.
  • FIG. 5 illustrates the positive electrode tab 35a, the positive electrode current collector plates 41a to 41h, the positive electrode terminal structure unit 11, and the positive electrode terminal structure unit 11 in order to explain the positive electrode side current collector structure of the nonaqueous electrolyte secondary battery of the present embodiment. It is the figure which showed the volt
  • FIG. 5 illustrates the positive electrode tab 35a, the positive electrode current collector plates 41a to 41h, the positive electrode terminal structure unit 11, and the positive electrode terminal structure unit 11 in order to explain the positive electrode side current collector structure of the nonaqueous electrolyte secondary battery of the present embodiment. It is the figure which showed the volt
  • the lengths of the positive electrode tab 35a and the negative electrode tab 37a are shown to be significantly shorter than the actual length. 4 and 5, the separator and the negative electrode plate are not shown. Further, in FIG. 4, for ease of illustration, the positive electrode current collector plate is illustrated such that the positive electrode tabs of the two positive electrode plates are welded to each other. The positive electrode tabs 35a of the 15 to 20 positive electrode plates 35 are joined to the respective 41a to 41h by welding or the like.
  • two screw holes 11d to which the bolts 29 are fastened are formed on the surface 11c facing in the stacking direction.
  • a fastening structure is configured by the bolt 29 and the two screw holes 11d.
  • the screw holes 11d are formed near the ends on both sides in the longitudinal direction of the surface 11c. Inside the screw hole 11d, a female screw that is screwed into a screw portion provided at the tip of the bolt 29 is formed.
  • the surface 11 c has a size that completely faces the positive electrode side pressing member 25.
  • the terminal main body 13b of the negative electrode terminal structure 13 has two screw holes 13d in which bolts 29 are fastened to the two surfaces 13c facing each other in the stacking direction, like the terminal main body 11b of the positive electrode terminal structure 11. Is formed. A female screw is also formed inside the screw hole 13d. The surface 13 c has a size that completely faces the negative electrode side pressing member 31.
  • the positive electrode side pressing member 25 is formed in a substantially rectangular parallelepiped shape from aluminum.
  • the positive electrode side pressing member 25 is formed with two through holes 25a through which the bolts 29 pass in the vicinity of both ends in the longitudinal direction.
  • the positive electrode side pressing member 25 is attached to the terminal main body portion 11b in a state where the positive electrode current collector plate laminated portion 27 is sandwiched between the positive electrode terminal structure portion 11 and the terminal main body portion 11b.
  • the positive electrode side pressing member 25 and the positive electrode current collector plate lamination portion 27 constitute connection means for connecting the terminal main body portion 11 b and the electrode plate group 3.
  • the terminal main body portion 11b of the present embodiment As shown in FIG. 4, screw holes are formed in the surface facing the surface 11c of the terminal main body portion 11b in the stacking direction, and the terminal main body portion 11b faces the opposite two.
  • Two positive current collector laminated portions 27 are respectively attached to one surface using a positive electrode side pressing member 25 and a bolt 29.
  • a cap-shaped electrical insulating material 30 is fitted to the head of the bolt 29.
  • the dimension of the gap between the head 29a of the bolt 29 having the fastening structure and the inner wall surface of the battery container 5 is set to a dimension that can prevent the bolt 29 from falling off.
  • the cap-shaped electrical insulating material 30 made of rubber or an insulating resin material (for example, polytetrafluoroethylene) prevents such a short circuit. According to the present embodiment, even if the bolt 29 is loosened and approaches the inner wall surface of the battery container 5, the head 29 a of the bolt 29 and the inner wall surface of the battery container 5 are in direct contact due to the presence of the electrical insulating material 30. There is nothing. In the present embodiment, the cap-shaped electrical insulating material 30 has a size that occupies most of the gap while being fitted to the head 29 a of the bolt 29.
  • the electrical insulating material 30 functions as a stopper member for the bolt 29 and can prevent the bolt 29 from proceeding loosening.
  • the fitting recess for fitting the electrical insulating material 30 is a cylindrical space having a diameter slightly smaller than the maximum diameter of the head 29 a of the bolt 29. The fitting operation can be performed without worrying about the positional relationship between the electrical insulating material 30 and the head 29a of the bolt 29. Needless to say, the electrical insulating material 30 may be used in a state where it is not completely fitted to the head portion 29a of the bolt 29 as in the electrical insulating material 30 located on the left side of the paper surface of FIG.
  • the 16 positive current collecting plates 41 are divided into two groups of 8 pieces each.
  • FIG. 5 shows only four positive electrode current collector plates 41a, 41b, 41e, and 41h.
  • the positive electrode current collector plates 41a to 41h are respectively provided with fixed portions 43a to 43h constituting the positive electrode current collector plate lamination portion 27 and welded portions 45a to 45h to which the positive electrode tabs 35a are welded.
  • the fixed portion 43 and the welded portion 45 are configured by bending the positive electrode current collector plate 41 made of aluminum formed in a substantially rectangular shape at the bending portion 47.
  • the positive electrode current collectors 41a to 41h have the same shape before being bent.
  • the fixed portion 43 of the present embodiment has two through holes 49 through which the bolts 29 penetrate in the vicinity of both end portions of the portion sandwiched between the terminal main body portion 11b of the positive electrode terminal structure portion 11 and the positive electrode side pressing member 25. Is formed.
  • the positive electrode current collector laminating portion 27 is configured by sequentially laminating the welded portions 45a to 45h.
  • the positive electrode current collector plate 41a attached at a position adjacent to the positive electrode side pressing member 25 has a welded portion 45a bent in a direction from the terminal body 11b toward the positive electrode side pressing member 25.
  • the positive electrode current collector plate 41a is bent so that the angle of the bent portion 47a between the fixed portion 43a and the welded portion 45a is 80 °.
  • the positive electrode current collector plates 41b to 41d have a welded portion 45a bent in a direction from the terminal body 11b toward the positive electrode side pressing member 25.
  • the angles of the bent portions 47b to 47d of the positive electrode current collector plates 41b to 41d are 90 °, 100 °, and 110 °, respectively.
  • the positive electrode current collector plates 41e to 41h have bent portions 45e to 45h bent in a direction from the positive electrode side pressing member 25 toward the terminal main body portion 11b.
  • the angles of the bent portions 47e to 47h of the positive electrode current collector plates 41e to 41h are 110 °, 100 °, 90 °, and 80 °, respectively.
  • a plate-like insulating member 61 is disposed between the electrode plate group 3 and the positive electrode terminal structure portion 11 and the negative electrode terminal structure portion 13. ing.
  • the insulating member 61 is formed of an insulating material that is light and does not react with the electrolyte, such as polytetrafluoroethylene. As shown in FIG.
  • the insulating member 61 includes four positive electrode tab passages 63 through which a positive electrode tab bundle composed of a plurality of divided positive electrode tab bundles 36 and four negative electrodes through which a negative electrode tab bundle composed of a plurality of divided negative electrode tab bundles 38 pass.
  • a tab passage 65 is provided.
  • the insulating member 61 is provided to prevent a short circuit between the positive electrode terminal structure 11 and the negative electrode plate 37 and a short circuit between the negative electrode terminal structure 13 and the positive electrode plate 35.
  • the four divided positive electrode tab bundles 36 that have passed through one positive electrode tab passage 63 are connected to the terminal body 11b of the positive electrode terminal structure 11 using the connection structure described above.
  • the four divided negative electrode tab bundles 38 that have passed through one negative electrode tab passage 65 are also connected to the negative electrode terminal structure portion 13 using the connection structure described above.
  • the portions of the four divided positive electrode tab bundles 36 that pass through one positive electrode tab passage 63 generate a force that pushes the insulating member 61 toward the electrode plate group 3 side. Is deformed.
  • the divided positive electrode tab bundle 36 is illustrated in order to show the deformed shape of the divided positive electrode tab bundle 36, and therefore, the four divided positive electrode tab bundles 36 are depicted as not pressing the insulating member 61. In practice, however, the insulating member 61 is pushed toward the electrode plate group 3 by the four divided positive electrode tab bundles 36.
  • FIG. 4 the portions of the four divided positive electrode tab bundles 36 that pass through one positive electrode tab passage 63 generate a force that pushes the insulating member 61 toward the electrode plate group 3 side. Is deformed.
  • the divided positive electrode tab bundle 36 is illustrated in order to show the deformed shape of the divided positive
  • the rightmost four divided positive electrode tab bundles 36 are bent in an inverted S shape, and the four right adjacent divided positive electrode tab bundles 36 are bent in an S shape.
  • the four divided positive electrode tab bundles 36 on the right side adjacent to the left are bent in an inverted S shape, and the four leftmost divided positive electrode tab bundles 36 are bent in an S shape. .
  • the insulating member 61 is pushed toward the electrode plate group 3 side by the restoring force of the divided positive electrode tab bundle 36.
  • the portions of the four divided negative electrode tab bundles 38 that have passed through the negative electrode tab passages 65 are also deformed to generate a force that pushes the insulating member 61 toward the electrode plate group 3 side.
  • one positive electrode tab bundle is constituted by four divided positive electrode tab bundles 36
  • one negative electrode tab bundle is constituted by four divided negative electrode tab bundles 38.
  • the two adjacent positive electrode tab bundles and the remaining two adjacent positive electrode tab bundles are each two between the two positive electrode tab passages 63. It is deformed so as to have a symmetrical shape with respect to the virtual plane S extending so as not to cross the positive electrode tab passage 63.
  • the two adjacent negative electrode tab bundles and the remaining two adjacent negative electrode tab bundles each have two negative electrode tabs 65 between two negative electrode tab passages 65.
  • the insulating member 61 can be pushed by the deformed positive electrode tab bundle and negative electrode tab bundle in the widest possible range. As a result, with the four positive electrode tab bundles and the four negative electrode tab bundles, the insulating member 61 can be pushed toward the electrode plate group 3 side, and the displacement of the insulating member 61 can be restricted. The possibility of occurrence of a short circuit can be greatly reduced. Moreover, according to this Embodiment, since the insulating member is comprised from the one member in which the positive electrode tab channel
  • the insulating member 61 ′ may be composed of two divided insulating members 61′A and 61′B that are combined to form the insulating member 61 ′.
  • the two divided insulating members 61'A and 61'B are arranged on both sides of one or more positive electrode tab bundles and one or more negative electrode tab bundles, so that one or more positive electrode tab bundles and one or more negative electrode tab bundles are arranged.
  • the one or more positive electrode tab bundles and the one or more negative electrode tab bundles to surround one or more positive electrode tab passages and one or more negative electrode tab passages to form a split slit 63 'and 65 'respectively.
  • the two divided insulating members 61′A and 61′B have a length dimension that overlaps at the respective tip portions. Specifically, the lengths of the two divided insulating members 61′A and 61′B are determined so that the tip of the divided insulating member 61′B is positioned below the divided insulating member 61′A.
  • the insulating member 61 ′ is constituted by the two divided insulating members 61 ′ A and 61 ′ B in this way, the insulating member even after the electrode plate group 3 is connected to the positive terminal structure 11 and the negative terminal structure 13. 61 'can be attached.
  • FIG. 8 is an enlarged view of a main part of the lithium ion secondary battery according to the second embodiment of the present invention.
  • components similar to those in the first embodiment shown in FIGS. 1 to 6 are given the same number as 100 plus the number given in FIGS. A description thereof will be omitted.
  • the second embodiment since the number of positive and negative electrodes in the electrode plate is halved compared to the first embodiment, the dimension in the thickness direction of the battery container 105 is halved.
  • the number of stacked portions 127 is also halved.
  • one positive electrode integrated plate laminate portion 127 is composed of four positive electrode current collector plates 41a to 41d.
  • a fastening structure is constituted by a double nut including a bolt 129 and two nuts 128A and 128B.
  • the cap-shaped electrical insulating material 130 is fitted to the two nuts 128A and 128B that move due to the looseness of the nuts.
  • the electrically insulating material 130 fitted to both of the double nuts is used, the electrically insulating material 130 suppresses the loosening of the double nut.
  • a similar structure is also adopted in the negative electrode terminal structure.
  • the present embodiment includes a first insulating member 161 and a second insulating member 167 that prevent a short circuit between the positive electrode terminal structure 111 and the negative electrode plate and a short circuit between the negative electrode terminal structure unit and the positive electrode plate. .
  • the negative electrode tab bundle formed by bundling a plurality of negative electrode tabs is such that the bundle portion passing through the negative electrode tab passage 165 of the first insulating member 161 serves as a pole for the first insulating member 161.
  • the electrode plate group 103 has two positive electrode tab bundles and two negative electrode tab bundles, and the two positive electrode tab bundles have two positive electrode tabs 163 between the two positive electrode tab passages 163. It is configured to have a symmetrical shape with respect to the virtual plane S ⁇ b> 1 extending so as not to intersect the passage 163.
  • the two negative electrode tab bundles are also deformed so as to have a symmetrical shape with respect to a virtual plane extending so as not to intersect the two negative electrode tab passages between the two negative electrode tab passages.
  • the insulating member can be pushed by the deformed positive electrode tab bundle and the negative electrode tab bundle in the widest possible range, and the displacement of the first and second insulating members is prevented, so that the occurrence of a short circuit is more sure. Can be reduced.
  • FIG. 9 is an enlarged view of a main part of the lithium ion secondary battery according to the third embodiment of the present invention.
  • the same members as those of the second embodiment shown in FIG. 8 are denoted by the same reference numerals as those in FIG.
  • the third embodiment is the same as the second embodiment except that the first insulating member 161 is not provided, as compared to the second embodiment.
  • the displacement of the insulating member 167 can be regulated by pushing the insulating member 167 toward the positive electrode terminal structure 111 side and the negative electrode terminal structure side by the positive electrode tab bundle and the negative electrode tab bundle. it can.
  • it is possible to prevent breakage of the tab and reduce the possibility of occurrence of a short circuit.
  • FIG. 10 is an enlarged view of a main part of the lithium ion secondary battery according to the fourth embodiment of the present invention.
  • the same components as those of the second embodiment shown in FIG. 8 are denoted by the same reference numerals as those in FIG. To do.
  • the second insulating member 161 is not provided, and the cap-shaped electrical insulating material is not fitted to the double nuts 228A and 228B.
  • a thick sheet-like electrical insulating material 230 is bonded or fixed to the wall surface of the battery case 205, and an insulating resin-made insulating sheet 230 'constituting the thin sheet-like electrical insulating material is an electrode plate group.
  • the electrically insulating material 230 is fixed in order to prevent the loosened nut 228B from coming into contact with the wall surface portion of the inner wall surface of the battery container 205 facing the nut 228B via the gap. .
  • the electrically insulating material 230 is formed of a material that does not react with the electrolytic solution, such as polytetrafluoroethylene, and is adhered to the wall surface portion of the battery container 205 using an adhesive that does not react with the electrolytic solution.
  • the insulating sheet 230 ′ has a length that extends to a position facing the head 229 a of the bolt 229 along the wall surface portion of the battery container 205.
  • the insulating sheet 230 ' is also formed of an insulating resin material that does not react with the electrolyte solution, such as polytetrafluoroethylene. Since the sheet-like electrically insulating material 230 and the insulating sheet 230 ′ are less expensive than the cap-like electrically insulating material, a secondary battery can be manufactured at a low cost.
  • the electrical insulating materials 30, 130, and 230 are formed of a deformable material.
  • the electrical insulating materials 30, 130, and 230 can be formed of a material that does not deform, such as ceramic.
  • the shape of the fitting recess of the electrical insulating materials 30, 130, 230 may be formed slightly larger than the shape of the bolt head or nut.
  • FIG. 11 is a view showing a modification of the positive electrode tab passage 363 or the negative electrode tab passage provided in the insulating member 361.
  • the one or more positive electrode tab passages 363 and the one or more negative electrode tab passages provided in the insulating member 361 are inclined in a direction to draw out the one or more positive electrode tab bundles 336 and the one or more negative electrode tab bundles.
  • the direction in which the positive electrode tab bundle 336 and the negative electrode tab bundle extend can be forced, so that the positive electrode tab bundle 336 and the negative electrode tab bundle are bent into a desired shape. It becomes possible.
  • the lithium ion secondary battery has been described.
  • the present invention is not limited to this, and the present invention may of course be applied to other secondary batteries. .
  • the bolt or nut and the inner wall surface of the battery container are not in direct contact due to the presence of the electrically insulating material. Without using it, it is possible to prevent a short circuit accident from occurring.

Abstract

L'invention concerne une batterie secondaire dans laquelle la mise en court-circuit d'un boîtier de batterie et d'un écrou ou d'un boulon d'une structure de fixation ne se produit pas, même si l'écrou ou le boulon sont desserrés. Les dimensions d'un interstice entre au moins la partie tête (29a) du boulon (29) ou l'écrou (128B) de la structure de fixation et une surface de paroi interne du boîtier de batterie (5) son ajustées de manière à empêcher que le boulon (29) ou l'écrou (128B) ne se détache. Une matière électro-isolante (30) empêchant le contact entre une section de la surface de paroi interne du boîtier de batterie (5) avec la partie tête (29a) du boulon (29) ou l'écrou (128B) est fixée à la section de surface de paroi faisant face à la partie tête (29a) du boulon ou à l'écrou (128B) de manière à ménager ledit interstice ou est fixée à la partie tête (29a) du boulon ou à l'écrou (128B) faisant face à ladite section de surface de paroi.
PCT/JP2013/076945 2012-10-03 2013-10-03 Batterie secondaire WO2014054734A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014539815A JPWO2014054734A1 (ja) 2012-10-03 2013-10-03 二次電池

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012221365 2012-10-03
JP2012-221365 2012-10-03

Publications (1)

Publication Number Publication Date
WO2014054734A1 true WO2014054734A1 (fr) 2014-04-10

Family

ID=50435054

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/076945 WO2014054734A1 (fr) 2012-10-03 2013-10-03 Batterie secondaire

Country Status (2)

Country Link
JP (1) JPWO2014054734A1 (fr)
WO (1) WO2014054734A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018062339A1 (fr) * 2016-09-30 2018-04-05 三洋電機株式会社 Procédé de fabrication de batterie secondaire angulaire
WO2022185464A1 (fr) * 2021-03-04 2022-09-09 株式会社 東芝 Électrode, groupe d'électrodes et batterie

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0992237A (ja) * 1995-09-27 1997-04-04 Sony Corp 円筒型二次電池及びその組電池
JPH11312509A (ja) * 1998-04-28 1999-11-09 Toyota Central Res & Dev Lab Inc 電極巻回型電池
JPH11345630A (ja) * 1998-06-02 1999-12-14 Ngk Insulators Ltd リチウム二次電池
JP2001015167A (ja) * 1999-06-25 2001-01-19 Sanyo Electric Co Ltd 筒型電池
JP2010009841A (ja) * 2008-06-25 2010-01-14 Panasonic Corp 円筒形密閉電池
JP2011054567A (ja) * 2009-09-01 2011-03-17 Sb Limotive Co Ltd ２次電池

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0992237A (ja) * 1995-09-27 1997-04-04 Sony Corp 円筒型二次電池及びその組電池
JPH11312509A (ja) * 1998-04-28 1999-11-09 Toyota Central Res & Dev Lab Inc 電極巻回型電池
JPH11345630A (ja) * 1998-06-02 1999-12-14 Ngk Insulators Ltd リチウム二次電池
JP2001015167A (ja) * 1999-06-25 2001-01-19 Sanyo Electric Co Ltd 筒型電池
JP2010009841A (ja) * 2008-06-25 2010-01-14 Panasonic Corp 円筒形密閉電池
JP2011054567A (ja) * 2009-09-01 2011-03-17 Sb Limotive Co Ltd ２次電池

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018062339A1 (fr) * 2016-09-30 2018-04-05 三洋電機株式会社 Procédé de fabrication de batterie secondaire angulaire
CN109792073A (zh) * 2016-09-30 2019-05-21 三洋电机株式会社 方形二次电池的制造方法
JPWO2018062339A1 (ja) * 2016-09-30 2019-07-18 三洋電機株式会社 角形二次電池の製造方法
JP7014171B2 (ja) 2016-09-30 2022-02-01 三洋電機株式会社 角形二次電池の製造方法
CN109792073B (zh) * 2016-09-30 2022-04-08 三洋电机株式会社 方形二次电池的制造方法
US11437652B2 (en) 2016-09-30 2022-09-06 Sanyo Electric Co., Ltd. Method of manufacturing square secondary battery
US11715846B2 (en) 2016-09-30 2023-08-01 Sanyo Electric Co., Ltd. Method of manufacturing square secondary battery
WO2022185464A1 (fr) * 2021-03-04 2022-09-09 株式会社 東芝 Électrode, groupe d'électrodes et batterie

Also Published As

Publication number Publication date
JPWO2014054734A1 (ja) 2016-08-25

Similar Documents

Publication Publication Date Title
WO2014054733A1 (fr) Batterie secondaire
EP2500972B1 (fr) Batterie secondaire au lithium ayant une structure à pattes conductrices multidirectionnelles
JP6158474B2 (ja) 二次電池
JP5783331B2 (ja) 二次電池の集電構造及び二次電池
JP5618706B2 (ja) 積層型電池
US10141560B2 (en) Energy storage device including a pressing member pressing a separator toward an electrode assembly
EP2337117B1 (fr) Batterie secondaire
US11735743B2 (en) Power storage device and power storage device production method
JP2010161044A (ja) 蓄電モジュール
JPWO2020166182A1 (ja) 電池モジュール
US20210313637A1 (en) Battery module
JP2014103027A (ja) 角形二次電池
US9672993B2 (en) Electricity storage device and electricity storage module
WO2014054734A1 (fr) Batterie secondaire
WO2013168260A1 (fr) Batterie secondaire
JP2013222517A (ja) 角形二次電池
US10637014B2 (en) Energy storage device
WO2013031642A1 (fr) Dispositif accumulateur
US20220158306A1 (en) Power storage device
US20230307800A1 (en) Secondary battery
US20230307799A1 (en) Secondary battery
WO2015129401A1 (fr) Dispositif d'accumulation de courant
JP2017027900A (ja) 蓄電装置
JP2014026735A (ja) 蓄電装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13844287

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2014539815

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13844287

Country of ref document: EP

Kind code of ref document: A1