WO2017057012A1 - Pile rechargeable à solution électrolytique non aqueuse - Google Patents

Pile rechargeable à solution électrolytique non aqueuse Download PDF

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Publication number
WO2017057012A1
WO2017057012A1 PCT/JP2016/077215 JP2016077215W WO2017057012A1 WO 2017057012 A1 WO2017057012 A1 WO 2017057012A1 JP 2016077215 W JP2016077215 W JP 2016077215W WO 2017057012 A1 WO2017057012 A1 WO 2017057012A1
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WO
WIPO (PCT)
Prior art keywords
positive electrode
negative electrode
secondary battery
metal foil
mixture layer
Prior art date
Application number
PCT/JP2016/077215
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English (en)
Japanese (ja)
Inventor
小島　亮
Original Assignee
日立オートモティブシステムズ株式会社
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Publication date
Application filed by 日立オートモティブシステムズ株式会社 filed Critical 日立オートモティブシステムズ株式会社
Priority to JP2017543116A priority Critical patent/JP6505859B2/ja
Publication of WO2017057012A1 publication Critical patent/WO2017057012A1/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
    • H01M50/50—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
    • 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
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • 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
    • 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
    • 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
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • 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 non-aqueous electrolyte secondary battery.
  • Patent Document 1 proposes a technique for preventing a short circuit by preventing a cutting edge of a positive electrode lead from overlapping with a negative electrode active material coated portion in an electrode winding group of a cylindrical lithium ion battery.
  • Patent Document 1 it is necessary to widen the uncut width of the portion of the base foil that is not used as a current collecting lead, and when the positive electrode mixture is rolled at a high density, the electrode is bent, The effect of being a method for increasing the mixture density is reduced.
  • the present invention has been made in view of the above points, and the object of the present invention is to short-circuit the negative electrode due to the cutting edge of the positive electrode tab portion without widening the uncut width of the positive electrode metal foil.
  • An object of the present invention is to provide a non-aqueous electrolyte secondary battery having a structure that can be prevented.
  • the non-aqueous electrolyte secondary battery of the present invention that solves the above problems is a non-aqueous electrolyte secondary battery having an electrode group in which positive electrodes and negative electrodes are alternately arranged with a separator interposed therebetween and stacked.
  • the positive electrode has a positive electrode base portion provided with a positive electrode mixture layer on both sides of the positive electrode metal foil, and a positive electrode tab portion protruding from the positive electrode base portion and exposing the positive electrode metal foil, the positive electrode tab portion
  • the protective layer is provided in the base end part of this.
  • FIG. 1 is an external perspective view of a prismatic secondary battery of Example 1.
  • FIG. 5B is a sectional view taken along line BB in FIG. 5A. The figure which expands and shows the A section of FIG. 5A. The figure which expands and shows the B section of FIG. 5B. The figure which shows typically the process of forming a positive mix layer and a protective layer. The figure which shows typically the process of forming a positive electrode tab part.
  • FIG. 6 is an external perspective view of a nonaqueous electrolyte secondary battery according to Example 2. The figure which expands and shows the A section of FIG.
  • Non-aqueous electrolyte secondary batteries are required to increase the density of the active material mixture in order to improve the capacity density.
  • coated to metal foil with a roll press apparatus is common.
  • a metal foil not coated with an active material for current collection is applied to one end and an electrode coated with an active material mixture is applied to the other end.
  • the portion where the active material is applied is strongly rolled, while the portion where the active material is not applied is weaker than that, so the difference in elongation of the metal foil occurs and the electrode is curved.
  • the cutting edge of the positive electrode metal foil is isolated from the negative electrode through the separator, but there is a concern that if the lead part is bundled and bent for welding to a current collector component, the separator is damaged and a short circuit is caused. Is done. That is, in order to increase the density of the positive electrode mixture containing the positive electrode active material of the non-aqueous electrolyte secondary battery, the material is rolled with high strength, but the active material is applied to prevent the electrode from being bent in this process. When the structure that cuts away the metal foil part that is not used to leave the part that becomes the lead for current collection is adopted, the cutting edge of the metal foil lead is likely to cause burrs and returns due to stress during processing. There is a concern that a short circuit may occur between the negative electrode and the positive electrode due to the breakage of the separator.
  • the nonaqueous electrolyte secondary battery of the present invention is provided with a protective layer at the base end portion of the positive electrode tab portion and in the region facing the adjacent negative electrode, and the positive electrode metal foil in the positive electrode tab portion is provided. It is possible to prevent the positive electrode and the negative electrode from being short-circuited through the burr.
  • FIG. 1 is an external perspective view of a prismatic secondary battery of Example 1
  • FIG. 2 is an exploded perspective view showing a state where an electrode group is attached to a lid assembly.
  • the nonaqueous electrolyte secondary battery of Example 1 to which the present invention is applied is a prismatic secondary battery 1, for example, a lithium ion secondary battery used as a power source for a hybrid vehicle or an electric vehicle.
  • the prismatic secondary battery 1 includes a battery container including a prismatic battery can 2 that houses the electrode group 4 and a battery lid 3 that closes an opening of the battery can 2.
  • the battery can 2 and the battery lid 3 are formed by subjecting a metal material such as aluminum or aluminum alloy to press working or the like.
  • the battery can 2 has a rectangular box shape formed by deep drawing, and the battery lid 3 has a rectangular flat plate shape that closes the opening of the battery can 2.
  • the battery lid 3 is welded to the battery can 2 to seal the opening.
  • the positive external terminal 11 and the negative external terminal 21 are disposed at positions on both ends in the direction along the long side of the battery lid 3.
  • a gas discharge valve 5 is disposed at a position near the center in the long side direction of the battery lid 3.
  • a liquid injection hole 6 for injecting an electrolyte into the battery is disposed at a side position of the gas discharge valve 5.
  • the liquid injection hole 6 is sealed by welding the liquid injection plug 7 to the battery lid 3 after injecting the electrolytic solution.
  • the electrolytic solution for example, a non-aqueous electrolytic solution in which a lithium salt such as lithium hexafluorophosphate (LiPF6) is dissolved in a carbonic acid ester-based organic solvent such as ethylene carbonate can be used.
  • the positive electrode current collector 12 and the negative electrode current collector 22 are fixed to the back side of the battery lid 3.
  • the positive electrode current collector 12 is caulked and fixed to the battery lid 3 integrally with the positive electrode external terminal 11 by a positive electrode connection terminal penetrating the battery lid 3, and is electrically connected to the positive electrode external terminal 11.
  • the negative electrode current collector 22 is caulked and fixed to the battery lid 3 integrally with the negative electrode external terminal 21 by a negative electrode connection terminal that penetrates the battery lid 3, and is electrically connected to the negative electrode external terminal 21.
  • an insulating resin is provided between the positive electrode connecting terminal and the negative electrode connecting terminal and the battery lid 3 and between the positive electrode current collector 12 and the negative electrode current collector 22 and the battery lid 3, respectively. Is insulated.
  • the positive electrode external terminal 11, the negative electrode external terminal 21, the positive electrode current collector 12, the negative electrode current collector 22 and the like are fixed to the battery cover 3 to form a cover assembly.
  • the electrode group 4 is attached to the lid assembly.
  • the electrode group 4 attached to the lid assembly is accommodated in the battery can 2 while being covered with an insulating case (not shown).
  • the material of the insulating case is an insulating resin such as polypropylene.
  • the electrode group 4 has a structure in which a positive electrode 31 and a negative electrode 41 are wound and laminated in a flat shape with a separator 51 interposed therebetween.
  • a plurality of positive electrode tab portions 35 are disposed at one end of the electrode group 4 in the winding axis direction, and a negative electrode tab portion 45 is disposed at the other end portion.
  • the positive electrode tab portion 35 and the negative electrode tab portion 45 are bundled at the center position in the thickness direction of the electrode group 4 and are integrally joined to the positive electrode current collector 12 and the negative electrode current collector 22 by ultrasonic welding, respectively.
  • the positive electrode ribbon 13 and the negative electrode ribbon 23 are in contact with each other and welded together so that the positive electrode tab portion 35 and the negative electrode tab portion 45 are not torn by vibration due to ultrasonic waves.
  • the positive electrode tab portion 35 and the negative electrode tab portion 45 are provided only in the flat portion of the flat portion and the curved portion of the electrode group 4, but as in the other specific example shown in FIG. 4.
  • the positive electrode tab portion 35 and the negative electrode tab portion 45 may be provided on both the flat portion and the curved portion of the electrode group 4 and bonded to the positive electrode current collector 12 and the negative electrode current collector 22, respectively.
  • FIG. 5A is a diagram for explaining the positional relationship between the positive electrode, the negative electrode, and the separator
  • FIG. 5B is a cross-sectional view taken along the line BB in FIG. 5A
  • FIG. 6A is an enlarged view of a portion A in FIG. 6B is an enlarged view of a portion B in FIG. 5B.
  • the positive electrode 31 has a positive electrode base portion 34 provided with a positive electrode mixture layer 33 on both surfaces of a positive electrode metal foil 32 and a positive electrode tab portion 35 protruding from the positive electrode base portion 34 and exposing the positive electrode metal foil 32.
  • the positive electrode base portion 34 has a strip shape having a long side and a short side, and a plurality of positive electrode tab portions 35 are provided at equal intervals on a long side 34 a on one side in the width direction of the positive electrode base portion 34. Yes.
  • the edge 33a on one side in the width direction of the positive electrode mixture layer 33 is provided at a position spaced apart from the long side 34a of the positive electrode base portion 34 with a predetermined distance x1.
  • the edge 33 b on the other side in the width direction is provided at the same position as the long side 34 b of the positive electrode base 34.
  • the positive electrode tab portion 35 and the positive electrode base portion 34 are integrally provided. However, a configuration in which a separate member is provided later may be employed.
  • the negative electrode 41 has a negative electrode base portion 44 provided with a negative electrode mixture layer 43 on both surfaces of the negative electrode metal foil 42 and a negative electrode tab portion 45 protruding from the negative electrode base portion 44 and exposing the negative electrode metal foil 42.
  • the negative electrode base portion 44 has a strip shape having a long side and a short side, and the negative electrode tab portion 45 is provided with a plurality at equal intervals on a long side 44 a on one side in the width direction of the negative electrode base portion 44. Yes.
  • An edge 43 b on one side in the width direction of the negative electrode mixture layer 43 is provided at the same position as the long side 44 b on one side in the width direction of the negative electrode base 44, and an edge on the other side in the width direction of the negative electrode mixture layer 43.
  • 43 a is provided at a position spaced apart from the long side 44 a of the negative electrode base 44 with a predetermined interval.
  • the positive electrode base 31 is formed so that the positive electrode base 34 is narrower than the negative electrode base 44 of the negative electrode 41.
  • the pair of long sides 34 a and 34 b of the positive electrode base 34 is wider than the pair of long sides 44 a and 44 b of the negative electrode base 44. It arrange
  • the positive electrode 31 is formed by cutting a portion other than the positive electrode tab portion 35 out of the positive electrode metal foil 32 protruding from the positive electrode mixture layer 33 to the vicinity of the positive electrode mixture layer 33. .
  • the width x1 from the positive electrode mixture layer 33 to the long side 34a of the positive electrode base 34 is such that the position of the edge 43b of the negative electrode mixture layer 43 and the edge of the positive electrode mixture layer 33 on one side in the width direction of the electrode group 4 It is formed to be smaller than the distance difference x2 from the position 33a.
  • the positive electrode metal foil 32 is made of an aluminum alloy foil having a thickness of about 20 to 30 ⁇ m
  • the negative electrode metal foil 42 is made of a copper alloy foil having a thickness of about 15 to 20 ⁇ m.
  • the positive electrode active material contained in the positive electrode mixture layer 33 is a lithium-containing transition metal double oxide such as lithium manganate, and the negative electrode active material contained in the negative electrode mixture layer 43 can reversibly store and release lithium ions.
  • Carbon material such as graphite.
  • the material of the separator 51 is a porous polyethylene resin.
  • the positive electrode tab portion 35 protrudes from the long side 34 a of the positive electrode base portion 34 toward the outer side in the width direction of the positive electrode 31 with a substantially constant tab width.
  • the positive electrode tab portion 35 is formed in an arc shape so that the tab width of the positive electrode tab portion 35 gradually decreases as it moves from the long side 34a of the positive electrode base portion 34 toward the distal end portion of the positive electrode tab portion 35.
  • a straight portion 35b that is formed in a straight line toward the tip portion continuously from the R portion 35a.
  • the R portion 35a of the positive electrode tab portion 35 is provided at a boundary portion between the positive electrode base portion 34 and the positive electrode base portion 34 in order to prevent the positive electrode tab portion 35 and the positive electrode tab portion 35 from being cut or broken.
  • the R portion 35 a is disposed at a position overlapping the negative electrode mixture layer 43 of the negative electrode 41. As will be described later, when the positive electrode tab portion 35 is formed by cutting with a rotary cutter, burrs may occur at the cutting edge of the positive electrode metal foil 32, and burrs are most likely to occur at the R portion 35a.
  • the R portion 35a is usually an end portion of the positive electrode metal foil 32 having a thickness of about 15 ⁇ m, and when a burr occurs during the formation of the positive electrode tab portion 35, for example, when bundled, it is a porous resin film having a thickness of about 30 ⁇ m. There is a possibility of causing a short circuit through the separator 51.
  • the protective layer 36 is provided in a region facing the negative electrode 41 adjacent to the proximal end portion of the positive electrode tab portion 35.
  • the protective layer 36 is provided with a width corresponding to at least the R portion 35 a of the positive electrode tab portion 35.
  • the end portion of the protective layer 36 is wider than the end edge 43 b of the negative electrode mixture layer 43. It is provided so that it may be located outside.
  • the protective layer 36 is formed, for example, by applying an insulating member on the positive electrode metal foil 32.
  • the insulating member can be simply obtained by applying and drying a resin in which polyvinylidene fluoride is dissolved in NMP.
  • the insulating member contains an inorganic filler such as alumina or an inorganic material having no conductivity such as lithium carbonate.
  • the composition of the insulating member is not limited.
  • the protective layer 36 has a predetermined thickness, and when a burr is generated in the positive electrode metal foil 32, the protruding height of the burr from the protective layer 36 can be reduced. Therefore, it is possible to prevent the burr of the positive electrode metal foil 32 of the R portion 35a from breaking through the separator and causing a short circuit.
  • the protective layer 36 is positioned at the outer side in the width direction from the edge 33 a of the positive electrode mixture layer 33 to the base end of the positive electrode tab portion 35 and the edge 43 b of the negative electrode mixture layer 43 of the adjacent negative electrode 41. Up to a width x3.
  • the coating width x3 of the protective layer 36 is preferably larger than the distance difference x2 between the side end position of the negative electrode mixture layer 43 and the side end position of the positive electrode mixture layer 33 on one side in the width direction of the electrode group 4.
  • the protective layer 36 is provided also in the region between the edge 33a of the positive electrode mixture layer 33 and the long side 34a of the positive electrode base 34, when a burr occurs at the cutting edge of the long side 34a, the positive electrode mixture layer The protrusion height of the burr from 33 can be lowered. Therefore, it is possible to prevent the burr of the positive electrode metal foil 32 from breaking through the separator 51 and short-circuiting with the adjacent negative electrode 41.
  • FIG. 7 is a diagram schematically showing the step of forming the positive electrode mixture layer and the protective layer
  • FIG. 8 is a diagram schematically showing the step of forming the positive electrode tab portion.
  • the method of forming the positive electrode 31 includes a step of applying a positive electrode mixture on both surfaces of the positive electrode metal foil 32 and a step of cutting one long side of the positive electrode metal foil 32 to form the positive electrode tab portion 35.
  • an insulating member for forming the protective layer 36 is also applied at the same time.
  • the manufacturing tact can be shortened by applying the insulating member simultaneously with the positive electrode mixture.
  • the insulating member is applied by a die coater. For example, as shown in FIG. 7, the positive electrode material mixture 32 is moved in the coating direction by using a nozzle 62 for applying an insulating member separately from the nozzle 61 for applying the positive electrode material mixture. An insulating member is applied to a position adjacent to the substrate.
  • the positive electrode tab portion 35 is formed by cutting an end portion on one side in the width direction of the positive electrode metal foil 32 using a rotary cutter 63 that rotates in the processing direction.
  • the positive electrode tab portion 35 is formed on both ends of the coating portion, and rolling is performed in that state, thereby equalizing the left and right elongation in the winding direction and preventing the electrode from being bent.
  • Example 2 will be described with reference to FIGS. 9 and 10.
  • FIG. 9 is an external perspective view of the non-aqueous electrolyte secondary battery according to Example 2, and FIG. 10 is an enlarged view of part A of FIG.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the positive electrode mixture layer 33 of the positive electrode base portion 34 is extended to the base end portion of the positive electrode tab portion 35 and a region facing the adjacent negative electrode 41 to form a protective layer.
  • the positive electrode mixture layer 33 is provided over the entire surface of the positive electrode base portion 34, and is also provided continuously at the base end portion of the positive electrode tab portion 35.
  • the positive electrode mixture layer 33 at the base end portion of the positive electrode tab portion 35 is provided over a width corresponding to the R portion 35a and forms a protective layer.
  • the positive electrode mixture layer 33 at the base end portion of the positive electrode tab portion 35 preferably covers the entire region facing the adjacent negative electrode 41, but is not limited to this configuration, and is most likely to generate burrs. It may be provided so as to cover only the width corresponding to the R portion 35a, which has the effect of reducing the possibility of a short circuit.
  • the edge 33 c of the positive electrode mixture layer 33 in the positive electrode tab portion 35 is located on the inner side in the width direction of the positive electrode 31 than the edge 43 b of the negative electrode mixture layer 43.
  • the positive electrode 31 and the negative electrode 41 are stacked on each other so that the edge 33 c of the positive electrode mixture layer 33 at the base end of the positive electrode tab portion 35 is located on the inner side in the width direction than the edge 43 b of the negative electrode mixture layer 43.
  • the positive electrode mixture layer 33 provided at the base end portion of the positive electrode tab portion 35 has a predetermined thickness, and when burrs occur at the cutting edge of the positive electrode metal foil 32, The protrusion height of the burr can be lowered. Further, since the positive electrode mixture layer 33 is provided up to the long side 34a of the positive electrode base portion 34, when a burr is generated at the cutting edge of the long side 34a, the protrusion height of the burr from the positive electrode mixture layer 33 is increased. Can be lowered. Therefore, it is possible to prevent the burr of the positive electrode metal foil 32 from breaking through the separator 51 and short-circuiting with the adjacent negative electrode 41.
  • the configuration is not limited to such a configuration.
  • the pressure required for rolling the negative electrode 41 is increased. If there is no concern that the negative electrode 41 is curved even if it is small and does not have a shape in which such a plurality of negative electrode tab portions 45 are provided, there is no need to form such a plurality of negative electrode tab portions 45, and a constant width It is also possible to use a negative electrode metal foil as the current collector.
  • the nonaqueous electrolyte secondary battery of the present invention is applied to the prismatic secondary battery 1 has been described as an example.
  • the present invention is not limited to such a configuration.
  • the present invention can also be applied to a cylindrical secondary battery having a cylindrical electrode group.
  • the electrode group 4 is not limited to a wound type, and can be applied to a stacked type in which rectangular sheet-like positive electrodes and negative electrodes are alternately stacked.
  • the case where the base portion of the positive electrode tab portion 35 has the R portion 35a has been described as an example. However, the provision of the R portion 35a is not essential, and the R portion 35a is not provided. May be.
  • the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed.
  • the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described.
  • a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment.

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  • Manufacturing & Machinery (AREA)
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  • Condensed Matter Physics & Semiconductors (AREA)
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Abstract

La présente invention a pour but d'obtenir une pile rechargeable à solution électrolytique non aqueuse dont la structure peut empêcher qu'un bord coupé d'une partie languette d'électrode positive ne provoque de court-circuit avec une électrode négative, sans augmenter la largeur d'une partie non coupée d'une feuille métallique d'électrode positive. Une pile rechargeable à solution électrolytique non aqueuse (1) selon la présente invention possède un groupe d'électrodes (4) obtenu par stratification alternée d'électrodes positives (31) et d'électrodes négatives (41) grâce à des séparateurs (51) intercalés entre elles. Chacune des électrodes positives (31) possède : une base d'électrode positive (34) obtenue par formation de couches de mélange d'électrode positive (33) sur les deux faces d'une feuille métallique d'électrode positive (32) ; une partie languette d'électrode positive (35) qui fait saillie de la base d'électrode positive (34) et où la feuille métallique d'électrode positive (32) est exposée. En outre, une couche de protection (36) est disposée au niveau d'une région qui est située sur la partie d'extrémité de base de la partie languette d'électrode positive (35) et qui est à l'opposé de l'électrode négative adjacente parmi les électrodes négatives (41).
PCT/JP2016/077215 2015-09-28 2016-09-15 Pile rechargeable à solution électrolytique non aqueuse WO2017057012A1 (fr)

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JP2017543116A JP6505859B2 (ja) 2015-09-28 2016-09-15 非水電解液二次電池

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JP2015190308 2015-09-28
JP2015-190308 2015-09-28

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Cited By (11)

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JP2017188371A (ja) * 2016-04-08 2017-10-12 リチウム エナジー アンド パワー ゲゼルシャフト ミット ベシュレンクテル ハフッング ウント コンパニー コマンディトゲゼルシャフトＬｉｔｈｉｕｍ Ｅｎｅｒｇｙ ａｎｄ Ｐｏｗｅｒ ＧｍｂＨ ＆ Ｃｏ． ＫＧ 蓄電素子
WO2018066184A1 (fr) * 2016-10-04 2018-04-12 株式会社村田製作所 Batterie, véhicule électrique et système de stockage d'énergie
WO2018216644A1 (fr) * 2017-05-26 2018-11-29 株式会社村田製作所 Procédé de fabrication d'accumulateur
JP2019021390A (ja) * 2017-07-11 2019-02-07 株式会社豊田自動織機 リチウムイオン二次電池
JP2019102361A (ja) * 2017-12-06 2019-06-24 パナソニックＩｐマネジメント株式会社 電極板及び二次電池
WO2020026483A1 (fr) * 2018-07-30 2020-02-06 パナソニックＩｐマネジメント株式会社 Batterie secondaire au lithium
JP2020191193A (ja) * 2019-05-21 2020-11-26 トヨタ自動車株式会社 非水電解質二次電池
CN112970144A (zh) * 2018-12-19 2021-06-15 三洋电机株式会社 二次电池用的电极板和使用了该电极板的二次电池
JP2022512776A (ja) * 2018-11-05 2022-02-07 テスラ，インコーポレイテッド タブレス構造電極を有するセル
JP2022074818A (ja) * 2020-11-05 2022-05-18 プライムプラネットエナジー＆ソリューションズ株式会社 電池およびその製造方法
JP2023066921A (ja) * 2021-10-29 2023-05-16 プライムプラネットエナジー＆ソリューションズ株式会社 電池

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11942661B2 (en) * 2021-09-24 2024-03-26 Apple Inc. Battery cells with tabs at right angles
US11929522B2 (en) 2021-09-24 2024-03-12 Apple Inc. Battery cells with tabs at right angles
US11870100B2 (en) 2021-09-24 2024-01-09 Apple Inc. Battery cells with tabs at right angles
CN115020630B (zh) * 2022-06-23 2024-06-25 三一技术装备有限公司 极片和极片单元的加工方法、极片、电池和极耳辊切装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010080392A (ja) * 2008-09-29 2010-04-08 Toshiba Corp 電池用電極及びその製造方法
WO2013031891A1 (fr) * 2011-08-31 2013-03-07 Ｎｅｃエナジーデバイス株式会社 Batterie rechargeable à électrolyte non aqueux
JP2014238915A (ja) * 2011-09-30 2014-12-18 三洋電機株式会社 積層式電池およびその製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010080392A (ja) * 2008-09-29 2010-04-08 Toshiba Corp 電池用電極及びその製造方法
WO2013031891A1 (fr) * 2011-08-31 2013-03-07 Ｎｅｃエナジーデバイス株式会社 Batterie rechargeable à électrolyte non aqueux
JP2014238915A (ja) * 2011-09-30 2014-12-18 三洋電機株式会社 積層式電池およびその製造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017188371A (ja) * 2016-04-08 2017-10-12 リチウム エナジー アンド パワー ゲゼルシャフト ミット ベシュレンクテル ハフッング ウント コンパニー コマンディトゲゼルシャフトＬｉｔｈｉｕｍ Ｅｎｅｒｇｙ ａｎｄ Ｐｏｗｅｒ ＧｍｂＨ ＆ Ｃｏ． ＫＧ 蓄電素子
WO2018066184A1 (fr) * 2016-10-04 2018-04-12 株式会社村田製作所 Batterie, véhicule électrique et système de stockage d'énergie
JPWO2018066184A1 (ja) * 2016-10-04 2019-03-22 株式会社村田製作所 電池、電動車両および蓄電システム
WO2018216644A1 (fr) * 2017-05-26 2018-11-29 株式会社村田製作所 Procédé de fabrication d'accumulateur
JP2019021390A (ja) * 2017-07-11 2019-02-07 株式会社豊田自動織機 リチウムイオン二次電池
JP7021466B2 (ja) 2017-07-11 2022-02-17 株式会社豊田自動織機 リチウムイオン二次電池
JP2019102361A (ja) * 2017-12-06 2019-06-24 パナソニックＩｐマネジメント株式会社 電極板及び二次電池
JP7008247B2 (ja) 2017-12-06 2022-02-10 パナソニックＩｐマネジメント株式会社 電極板及び二次電池
JPWO2020026483A1 (ja) * 2018-07-30 2021-08-02 パナソニックＩｐマネジメント株式会社 リチウム二次電池
CN112470323A (zh) * 2018-07-30 2021-03-09 松下知识产权经营株式会社 锂二次电池
WO2020026483A1 (fr) * 2018-07-30 2020-02-06 パナソニックＩｐマネジメント株式会社 Batterie secondaire au lithium
CN112470323B (zh) * 2018-07-30 2024-02-23 松下知识产权经营株式会社 锂二次电池
JP7270142B2 (ja) 2018-07-30 2023-05-10 パナソニックＩｐマネジメント株式会社 リチウム二次電池
JP2022512776A (ja) * 2018-11-05 2022-02-07 テスラ，インコーポレイテッド タブレス構造電極を有するセル
CN112970144B (zh) * 2018-12-19 2023-11-17 三洋电机株式会社 二次电池用的电极板和使用了该电极板的二次电池
CN112970144A (zh) * 2018-12-19 2021-06-15 三洋电机株式会社 二次电池用的电极板和使用了该电极板的二次电池
JP2020191193A (ja) * 2019-05-21 2020-11-26 トヨタ自動車株式会社 非水電解質二次電池
JP7236030B2 (ja) 2019-05-21 2023-03-09 トヨタ自動車株式会社 リチウムイオン二次電池
JP7154270B2 (ja) 2020-11-05 2022-10-17 プライムプラネットエナジー＆ソリューションズ株式会社 電池およびその製造方法
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