WO2017208532A1 - Batterie secondaire - Google Patents

Batterie secondaire Download PDF

Info

Publication number
WO2017208532A1
WO2017208532A1 PCT/JP2017/007223 JP2017007223W WO2017208532A1 WO 2017208532 A1 WO2017208532 A1 WO 2017208532A1 JP 2017007223 W JP2017007223 W JP 2017007223W WO 2017208532 A1 WO2017208532 A1 WO 2017208532A1
Authority
WO
WIPO (PCT)
Prior art keywords
secondary battery
curved
curved surface
positive electrode
negative electrode
Prior art date
Application number
PCT/JP2017/007223
Other languages
English (en)
Japanese (ja)
Inventor
徹 川合
大塚　正博
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Publication of WO2017208532A1 publication Critical patent/WO2017208532A1/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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • 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
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
    • H01M10/058—Construction or manufacture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a secondary battery.
  • Secondary batteries that can be repeatedly charged and discharged have been used for various purposes.
  • the secondary battery is used as a power source for electronic devices such as smartphones and notebook computers.
  • Patent Document 1 discloses a secondary battery provided with a recessed region having a bent shape.
  • the shape of the electronic medium connected to the secondary battery may be a curved shape depending on the application.
  • the shape of the recessed area of the secondary battery is different from the shape of the electronic medium, the curved electronic medium is preferably fitted into the recessed area of the secondary battery due to the difference in shape. It becomes difficult to provide. For this reason, it does not suitably meet the requirements for efficient installation of the electronic medium for the secondary battery in the electronic device.
  • An object of the present invention is to provide a secondary battery that enables efficient installation of an electronic medium having a curved shape.
  • An electrode assembly including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, and an electrolyte, and a secondary battery in which an electrolyte is housed,
  • a concave surface that is recessed inwardly is formed on a part of the contour surface of the secondary battery, and a curved surface is formed on at least a part of the concave surface, and the curved angle of the curved surface is based on the curved center point 90 degrees or more and 180 degrees or less, and the bending center point is a point that is equidistant from one end of the curved surface, the other end of the curved surface, and an intermediate point between one end and the other end of the curved surface.
  • a secondary battery is provided.
  • the secondary battery according to an embodiment of the present invention enables efficient installation of an electronic medium having a curved shape.
  • FIG. 1 is a schematic view of a secondary battery according to an embodiment of the present invention.
  • FIG. 2 is a schematic view of a secondary battery having a curved surface with a bending angle of 90 °.
  • FIG. 3 is a schematic view of a secondary battery having a curved surface with a bending angle of 120 °.
  • FIG. 4 is a schematic view of a secondary battery having a curved surface with a bending angle of 180 °.
  • FIG. 5 is a schematic view of a secondary battery in which a curved surface is formed on a part of the concave surface.
  • FIG. 6 is a schematic diagram showing a state in which two secondary batteries are arranged so that curved surfaces face each other.
  • FIG. 7 shows a schematic diagram illustrating the concept of the curvature center point.
  • the term “secondary battery” refers to a battery that can be repeatedly charged and discharged.
  • the “secondary battery” is not excessively bound by the name, and may include, for example, “electric storage device”.
  • the term “plan view” as used herein refers to a state when an object (for example, a secondary battery) is placed in a broad sense and viewed from above or below along its thickness (height) direction. That is the same as the plan view.
  • the “plan view” is a state when the object is viewed from the upper side or the lower side along the thickness direction based on the stacking direction of the electrode materials constituting the secondary battery in a narrow sense.
  • side view refers to a state in which an object (for example, a secondary battery) is placed and viewed from a direction substantially perpendicular to the thickness (height) direction. It is a state and is a side view and agreement.
  • side view refers to a state when viewed from a direction substantially perpendicular to the thickness direction based on the stacking direction of the electrode materials constituting the secondary battery.
  • a secondary battery according to an embodiment of the present invention has a structure in which an electrode assembly and an electrolyte are accommodated and enclosed in an exterior body.
  • the electrode assembly includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode.
  • a spacer is provided in the exterior body in order to prevent electronic contact between the positive and negative electrodes and the exterior body.
  • the positive electrode is electronically connected to the positive electrode external terminal via the positive electrode current collecting lead.
  • the external terminal for positive electrode is fixed to the exterior body by a seal portion, and the seal portion prevents electrolyte leakage.
  • the negative electrode is electronically connected to the negative electrode external terminal via the negative electrode current collecting lead.
  • the external terminal for negative electrode is fixed to the exterior body by a seal portion, and the seal portion prevents electrolyte leakage.
  • the positive electrode is composed of at least a positive electrode material layer and a positive electrode current collector, and the positive electrode material layer is provided on at least one surface of the positive electrode current collector.
  • the positive electrode material layer contains a positive electrode active material as an electrode active material.
  • the negative electrode is composed of at least a negative electrode material layer and a negative electrode current collector, and the negative electrode material layer is provided on at least one surface of the negative electrode current collector.
  • the negative electrode material layer contains a negative electrode active material as an electrode active material.
  • the positive electrode active material included in the positive electrode material layer and the negative electrode active material included in the negative electrode material layer are materials directly involved in the transfer of electrons in the secondary battery, and are the main materials of the positive and negative electrodes that are responsible for charge / discharge, that is, the battery reaction. is there. More specifically, ions are brought into the electrolyte due to the “positive electrode active material included in the positive electrode material layer” and the “negative electrode active material included in the negative electrode material layer”, and the ions are interposed between the positive electrode and the negative electrode. Then, the electrons are transferred and the electrons are delivered and charged and discharged.
  • the positive electrode material layer and the negative electrode material layer are particularly preferably layers capable of occluding and releasing lithium ions.
  • the secondary battery according to this embodiment corresponds to a so-called “lithium ion battery”.
  • the positive electrode active material of the positive electrode material layer is made of, for example, a granular material, and a binder (also referred to as a “binder”) is included in the positive electrode material layer for sufficient contact between the particles and shape retention. preferable. Furthermore, a conductive additive may be included in the positive electrode material layer in order to facilitate the transmission of electrons that promote the battery reaction.
  • the negative electrode active material of the negative electrode material layer is made of, for example, a granular material, and it is preferable that a binder is included for sufficient contact and shape retention between the particles, facilitating the transfer of electrons that promote the battery reaction. Therefore, a conductive additive may be included in the negative electrode material layer.
  • the positive electrode material layer and the negative electrode material layer can also be referred to as “positive electrode composite material layer” and “negative electrode composite material layer”, respectively.
  • the positive electrode active material is preferably a material that contributes to occlusion and release of lithium ions.
  • the positive electrode active material is preferably, for example, a lithium-containing composite oxide.
  • the positive electrode active material is preferably a lithium transition metal composite oxide containing lithium and at least one transition metal selected from the group consisting of cobalt, nickel, manganese, and iron. That is, such a lithium transition metal composite oxide is preferably included as the positive electrode active material in the positive electrode material layer of the secondary battery.
  • the positive electrode active material may be lithium cobaltate, lithium nickelate, lithium manganate, lithium iron phosphate, or a part of those transition metals replaced with another metal.
  • the positive electrode active material contained in the positive electrode material layer is lithium cobalt oxide.
  • the binder that can be included in the positive electrode material layer is not particularly limited, but includes polyvinylidene fluoride, vinylidene fluoride-hexafluoropropylene copolymer, vinylidene fluoride-tetrafluoroethylene copolymer, and Mention may be made of at least one selected from the group consisting of polytetrafluoroethylene and the like.
  • the conductive additive that can be contained in the positive electrode material layer is not particularly limited, but carbon black such as thermal black, furnace black, channel black, ketjen black, and acetylene black, graphite, carbon nanotube, and vapor phase growth.
  • the binder of the positive electrode material layer is polyvinylidene fluoride
  • the conductive additive of the positive electrode material layer is carbon black.
  • the binder and conductive additive of the positive electrode material layer are a combination of polyvinylidene fluoride and carbon black.
  • the negative electrode active material is preferably a material that contributes to occlusion and release of lithium ions. From this point of view, the negative electrode active material is preferably, for example, various carbon materials, oxides, or lithium alloys.
  • Examples of various carbon materials of the negative electrode active material include graphite (natural graphite, artificial graphite), soft carbon, hard carbon, diamond-like carbon, and the like.
  • graphite is preferable in that it has high electron conductivity and excellent adhesion to the negative electrode current collector.
  • Examples of the oxide of the negative electrode active material include at least one selected from the group consisting of silicon oxide, tin oxide, indium oxide, zinc oxide, lithium oxide, and the like.
  • the lithium alloy of the negative electrode active material may be any metal that can be alloyed with lithium.
  • Al, Si, Pb, Sn, In, Bi, Ag, Ba, Ca, Hg, Pd, Pt, Te, Zn It may be a binary, ternary or higher alloy of a metal such as La and lithium.
  • a binary, ternary or higher alloy of a metal such as La and lithium.
  • Such an oxide is preferably amorphous in its structural form. This is because deterioration due to non-uniformity such as crystal grain boundaries or defects is less likely to be caused.
  • the negative electrode active material of the negative electrode material layer is artificial graphite.
  • the binder that can be included in the negative electrode material layer is not particularly limited, but is at least one selected from the group consisting of styrene butadiene rubber, polyacrylic acid, polyvinylidene fluoride, polyimide resin, and polyamideimide resin. Can be mentioned.
  • the binder contained in the negative electrode material layer is styrene butadiene rubber.
  • the conductive aid that can be included in the negative electrode material layer is not particularly limited, but carbon black such as thermal black, furnace black, channel black, ketjen black, and acetylene black, graphite, carbon nanotube, and vapor phase growth.
  • Examples thereof include at least one selected from carbon fibers such as carbon fibers, metal powders such as copper, nickel, aluminum and silver, and polyphenylene derivatives.
  • the component resulting from the thickener component for example, carboxymethylcellulose used at the time of battery manufacture may be contained in the negative electrode material layer.
  • the negative electrode active material and the binder in the negative electrode material layer are a combination of artificial graphite and styrene butadiene rubber.
  • the positive electrode current collector and the negative electrode current collector used for the positive electrode and the negative electrode are members that contribute to collecting and supplying electrons generated in the active material due to the battery reaction.
  • a current collector may be a sheet-like metal member and may have a porous or perforated form.
  • the current collector may be a metal foil, a punching metal, a net or an expanded metal.
  • the positive electrode current collector used for the positive electrode is preferably made of a metal foil containing at least one selected from the group consisting of aluminum, stainless steel, nickel and the like, and may be, for example, an aluminum foil.
  • the negative electrode current collector used for the negative electrode is preferably made of a metal foil containing at least one selected from the group consisting of copper, stainless steel, nickel and the like, and may be, for example, a copper foil.
  • the separator is a member provided from the viewpoint of preventing short circuit due to contact between the positive and negative electrodes and holding the electrolyte.
  • the separator can be said to be a member that allows ions to pass while preventing electronic contact between the positive electrode and the negative electrode.
  • the separator is a porous or microporous insulating member and has a film form due to its small thickness.
  • a polyolefin microporous film may be used as the separator.
  • the microporous film used as the separator may include, for example, only polyethylene (PE) or only polyethylene (PP) as the polyolefin.
  • the separator may be a laminate composed of “a microporous membrane made of PE” and “a microporous membrane made of PP”.
  • the surface of the separator may be covered with an inorganic particle coat layer and / or an adhesive layer.
  • the surface of the separator may have adhesiveness.
  • Electrolyte helps the movement of metal ions released from the electrodes (positive and negative electrodes).
  • the electrolyte may be an electrolyte containing a “non-aqueous” solvent such as an organic electrolyte and an organic solvent and a solute, or may be an “aqueous” electrolyte containing water.
  • the secondary battery of the present invention is preferably a non-aqueous electrolyte secondary battery using a “non-aqueous” electrolyte as the electrolyte.
  • the electrolyte may have a form such as liquid or gel (in the present specification, “liquid” non-aqueous electrolyte is also referred to as “non-aqueous electrolyte solution”).
  • a solvent containing at least carbonate is preferable.
  • Such carbonates may be cyclic carbonates and / or chain carbonates.
  • examples of the cyclic carbonates include at least one selected from the group consisting of propylene carbonate (PC), ethylene carbonate (EC), butylene carbonate (BC), and vinylene carbonate (VC). be able to.
  • examples of the chain carbonates include at least one selected from the group consisting of dimethyl carbonate (DMC), diethyl carbonate (DEC), ethyl methyl carbonate (EMC), and dipropyl carbonate (DPC).
  • a combination of cyclic carbonates and chain carbonates is used as the non-aqueous electrolyte, for example, a mixture of ethylene carbonate and diethyl carbonate.
  • a Li salt such as LiPF 6 or LiBF 4 is preferably used.
  • a Li salt such as LiPF 6 or LiBF 4 is preferably used.
  • the exterior body is usually a conductive hard case and consists of a main body and a lid.
  • a main-body part consists of the bottom part and side part which comprise the bottom face of the said exterior body.
  • the main body and the lid are sealed after the electrode assembly, the electrolyte, the current collecting lead, and the external terminal are accommodated.
  • the sealing method is not particularly limited, and examples thereof include a laser irradiation method.
  • a material constituting the main body part and the lid part any material capable of constituting a hard case type exterior body in the field of secondary batteries can be used.
  • Such a material may be any material that can achieve electron transfer, and examples thereof include conductive materials such as aluminum, nickel, iron, copper, and stainless steel.
  • the dimensions of the main body and the lid are mainly determined according to the dimensions of the electrode assembly.
  • the dimensions are such that the electrode assembly is prevented from moving (displacement) within the exterior body. It is preferable to have. By preventing the movement of the electrode assembly, the electrode assembly is prevented from being destroyed, and the safety of the secondary battery is improved.
  • the exterior body may be a flexible case such as a pouch made of a laminate film as long as it has conductivity.
  • any spacer used in the field of secondary batteries can be used as the spacer.
  • the material constituting the spacer is not particularly limited, and examples thereof include various insulating polymers such as polyolefin (polyethylene, polypyropylene), polyester (polyethylene terephthalate, polybutylene terephthalate), and acrylic polymer.
  • the spacer is not particularly limited, but may have a film or non-woven fabric form.
  • any current collecting lead used in the field of secondary batteries can be used.
  • a current collecting lead may be made of a material that can achieve electron movement, and is made of a conductive material such as aluminum, nickel, iron, copper, and stainless steel.
  • the positive electrode current collector lead is preferably composed of aluminum, and the negative electrode current collector lead is preferably composed of nickel.
  • the form of the positive electrode current collector lead and the negative electrode current collector lead is not particularly limited, and may be, for example, a wire or a plate.
  • FIG. 1 is a schematic diagram (schematic plan view or schematic side view) of a secondary battery according to an embodiment of the present invention.
  • a concave surface 11 that is recessed toward the inside is formed on a part of the contour surface 10 of the secondary battery 100.
  • the concave surface 11 includes a curved surface 12 at least at a part thereof.
  • the curved surface 12 is an inner curved surface that is curved toward the inner side.
  • the bending angle ⁇ of the curved surface 12 is 90 ° or more and 180 ° or less with the bending center point C as a base point.
  • the “curvature center point” refers to a point equidistant from one end of the curved surface, the other end of the curved surface, and an intermediate point between one end and the other end of the curved surface.
  • the “curvature center point” means a distance R with one end of the curved surface, a distance R ′ with the intermediate point of the curved surface, and a distance R with the other end of the curved surface.
  • '' Refers to the point where all are equal.
  • the type of the electrode assembly is roughly divided into two types, that is, a planar stacked structure type and a wound structure type, and therefore the shape of the electrode assembly is different.
  • the shape of the exterior body does not change in a plan view or a side view. Therefore, it is preferable that the exterior body, which is a component of the secondary battery according to the embodiment of the present invention, has a curved surface that is curved at least inward in a plan view or a side view. Further, in response to the exterior body having a curved surface curved inward, the planar laminated structure type electrode assembly enclosed in the exterior body is also inwardly in plan view or side view.
  • the present invention is not limited to this, and the wound structure type electrode assembly enclosed in the exterior body is also viewed in a plan view or a side surface in response to the exterior body having a curved surface curved inward. You may have the curved surface curved toward the inner side by visual observation.
  • the shape of the electronic medium connected to the secondary battery 100 depends on the application. Therefore, the shape of the curved surface 12 of the secondary battery 100 and the shape of the electronic medium have the same or similar shape. More specifically, the present invention relates to a curved surface curved inward in a part of the contour surface 10 of the secondary battery 100 in correspondence with the curved shape of the electronic medium connected to the secondary battery 100. 12 is formed. That is, the shape of the curved surface 12 of the secondary battery 100 of the present invention depends on the curved shape of the electronic medium connected to the secondary battery 100.
  • the curved surface 12 formed in the secondary battery 100 functions as a surface for arranging an electronic medium having a curved shape. Therefore, even when the shape of the electronic medium is a curved shape, the electronic medium can be efficiently installed on the secondary battery in the electronic device. Therefore, it is possible to meet demands for thinning and miniaturization of electronic devices.
  • all of the concave surface 11 formed in the inner direction on a part of the contour surface 10 of the secondary battery 100 may be the curved surface 12 according to the curved shape and size of the electronic medium.
  • the curvature center point C is located outside the extending shaft 14 of the non-concave surface 13 that is continuous with the concave surface 11 (see FIGS. 2 and 3).
  • the bending center point C is outside the extending axis 14, for example, as shown in FIG. 2
  • the bending angle of the curved surface 12 formed in the secondary battery 100 is 90 °.
  • the bending center point C is outside the extending axis 14, for example, as shown in FIG.
  • the bending angle of the bending surface 12 formed in the secondary battery 100 is 120 °. It is done. Further, the center C of curvature may be on the extending axis 14 of the non-concave surface 13 that is continuous with the concave surface 11 (see FIG. 4). As an example in which the bending center point C is on the extending axis 14, for example, as shown in FIG. 4, there is a case where the bending angle of the bending surface 12 formed in the secondary battery 100 is 180 °.
  • a curved surface 12 having a curved angle of 180 ° may be formed at a substantially intermediate position of the concave surface 11.
  • the surface excluding the curved surface 12 has a substantially planar shape, and the curved center point C is located on the inner side of the extending axis 14 of the non-concave surface 13 that is continuous with the concave surface 11. become.
  • an electronic medium having a shape having a substantially flat portion and a curved portion in the region where the concave surface 11 of the secondary battery 100 is formed is preferably used. It can be inserted.
  • the two secondary batteries 100 may be arranged so that the curved surfaces 12 face each other.
  • the curved angle of the curved surface 12 is 160 ° or more in any secondary battery 100. It is preferable that it is 180 degrees or less.
  • a substantially circular region is formed in a plan view or a side view as shown in FIG. This makes it possible to arrange the curved electronic medium so as to be suitably accommodated in the substantially circular region. Therefore, even when the shape of the electronic medium is a curved shape as a whole in plan view or side view, the electronic medium can be more efficiently installed in the secondary battery in the electronic device.
  • an R chamfered portion is provided on at least one of the one end of the curved surface and the other end of the curved surface in plan view or side view. (Corresponding to a portion having a round shape) is preferably formed.
  • the contact resistance between the electronic medium and the curved surface can be reduced when an electronic medium having a curved shape is provided in the region where the curved surface of the secondary battery is formed. it can. Therefore, the electronic medium having a curved shape can be smoothly fitted in the region where the curved surface of the secondary battery is formed.
  • an R chamfered portion is formed on at least one of the one end of the concave surface and the other end of the concave surface in a plan view or a side view. .
  • an R chamfered portion is formed at the boundary portion between the non-curved surface 13 and the concave surface 11.
  • the bending angle ⁇ of the curved surface is 180 ° or less with the bending center point C as a base point
  • the laser is uniformly irradiated to the welded portion.
  • the bending angle ⁇ of the curved surface is 180 ° or less with the bending center point C as a base point
  • it is easy to weld using a laser it is easy to weld using a laser. The effect is also produced.
  • the secondary battery according to an embodiment of the present invention can be used in various fields where power storage is assumed.
  • the secondary battery according to an embodiment of the present invention particularly the non-aqueous electrolyte secondary battery, is merely an example, and the electric / information / communication field (for example, a mobile phone, a smart phone, a notebook) Mobile devices such as personal computers and digital cameras), home / small industrial applications (eg, power tools, golf carts, home / care / industrial robots), large industrial applications (eg, forklifts, elevators, bay ports) Crane field), transportation system field (for example, hybrid vehicle, electric vehicle, bus, train, electric assist bicycle, electric motorcycle, etc.), power system application (for example, various power generation, road conditioner, smart grid, general home installation) Field), as well as space and deep sea applications (eg space probes) It can be used in the field), such as diving research vessel.
  • the electric / information / communication field for example, a mobile phone, a smart phone, a notebook
  • Mobile devices such

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

La présente invention concerne une batterie secondaire 100 dans laquelle un groupe d'électrodes et un électrolyte sont logés dans un corps d'encapsulation. Le groupe d'électrodes comprend une électrode positive, une électrode négative et un séparateur qui est disposé entre l'électrode positive et l'électrode négative. La batterie secondaire 100 est caractérisée en ce qu'une surface renfoncée 11 qui est renfoncée vers l'intérieur est formée au niveau d'une partie d'une surface de contour 10 de la batterie secondaire 100; et une surface incurvée 12 est formée au niveau d'au moins une partie de la surface renfoncée 11, l'angle de courbure de la surface incurvée 12 par rapport à un centre de courbure C étant de 90° à 180 °. Le centre de courbure C est un point qui est à équidistance d'une extrémité de la surface incurvée 12, de l'autre extrémité de la surface incurvée 12, et d'un point quelconque sur la surface incurvée 12 entre une extrémité et l'autre extrémité.
PCT/JP2017/007223 2016-05-31 2017-02-24 Batterie secondaire WO2017208532A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016109177A JP2019145201A (ja) 2016-05-31 2016-05-31 二次電池
JP2016-109177 2016-05-31

Publications (1)

Publication Number Publication Date
WO2017208532A1 true WO2017208532A1 (fr) 2017-12-07

Family

ID=60478302

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/007223 WO2017208532A1 (fr) 2016-05-31 2017-02-24 Batterie secondaire

Country Status (2)

Country Link
JP (1) JP2019145201A (fr)
WO (1) WO2017208532A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0513054A (ja) * 1991-07-01 1993-01-22 Sanyo Electric Co Ltd 密閉式角型蓄電池とその製造方法
JPH0528973A (ja) * 1991-07-25 1993-02-05 Matsushita Electric Ind Co Ltd 角形密閉式電池
JP2001155693A (ja) * 1999-11-25 2001-06-08 Nec Mobile Energy Kk 密閉型電池
JP2008130371A (ja) * 2006-11-21 2008-06-05 Sanyo Electric Co Ltd 電池ケース、該電池ケースを備える非水電解質二次電池及び該非水電解質二次電池の製造方法
JP2015103517A (ja) * 2013-11-20 2015-06-04 三星エスディアイ株式会社Ｓａｍｓｕｎｇ ＳＤＩ Ｃｏ．，Ｌｔｄ． 二次電池
JP2015176789A (ja) * 2014-03-17 2015-10-05 日立マクセル株式会社 非水電解質二次電池

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0513054A (ja) * 1991-07-01 1993-01-22 Sanyo Electric Co Ltd 密閉式角型蓄電池とその製造方法
JPH0528973A (ja) * 1991-07-25 1993-02-05 Matsushita Electric Ind Co Ltd 角形密閉式電池
JP2001155693A (ja) * 1999-11-25 2001-06-08 Nec Mobile Energy Kk 密閉型電池
JP2008130371A (ja) * 2006-11-21 2008-06-05 Sanyo Electric Co Ltd 電池ケース、該電池ケースを備える非水電解質二次電池及び該非水電解質二次電池の製造方法
JP2015103517A (ja) * 2013-11-20 2015-06-04 三星エスディアイ株式会社Ｓａｍｓｕｎｇ ＳＤＩ Ｃｏ．，Ｌｔｄ． 二次電池
JP2015176789A (ja) * 2014-03-17 2015-10-05 日立マクセル株式会社 非水電解質二次電池

Also Published As

Publication number Publication date
JP2019145201A (ja) 2019-08-29

Similar Documents

Publication Publication Date Title
US11811022B2 (en) Secondary battery
WO2017209052A1 (fr) Batterie rechargeable
WO2018154989A1 (fr) Pile rechargeable et son procédé de fabrication
US10998600B2 (en) Laminated secondary battery and manufacturing method of the same, and device
JP6879358B2 (ja) 二次電池
US20230307713A1 (en) Method for manufacturing secondary battery
US20190334210A1 (en) Secondary battery
WO2018186205A1 (fr) Accumulateur et son procédé de fabrication
WO2018155210A1 (fr) Batterie secondaire et procédé de production de batterie secondaire
JPWO2018131346A1 (ja) 二次電池
WO2020218213A1 (fr) Batterie secondaire
WO2017208683A1 (fr) Batterie secondaire
JP6773133B2 (ja) 二次電池
JP6885410B2 (ja) 二次電池
JP6828751B2 (ja) 二次電池
WO2017208534A1 (fr) Batterie rechargeable
WO2018163775A1 (fr) Procédé de production de batterie secondaire
WO2018154987A1 (fr) Batterie rechargeable et procédé permettant de produire cette dernière
WO2017208532A1 (fr) Batterie secondaire
WO2022009997A1 (fr) Batterie secondaire
US11342590B2 (en) Secondary battery
WO2022044672A1 (fr) Batterie secondaire et son procédé de fabrication
US11929467B2 (en) Secondary battery
US20240170731A1 (en) Secondary battery and method of manufacturing the same
JP2018206490A (ja) 二次電池およびその製造方法

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

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

Ref document number: 17806094

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 17806094

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP