WO2018110067A1 - Pile rechargeable, bloc-piles, véhicule électrique, système de stockage d'électricité, outil électrique et dispositif électronique - Google Patents

Pile rechargeable, bloc-piles, véhicule électrique, système de stockage d'électricité, outil électrique et dispositif électronique Download PDF

Info

Publication number
WO2018110067A1
WO2018110067A1 PCT/JP2017/037361 JP2017037361W WO2018110067A1 WO 2018110067 A1 WO2018110067 A1 WO 2018110067A1 JP 2017037361 W JP2017037361 W JP 2017037361W WO 2018110067 A1 WO2018110067 A1 WO 2018110067A1
Authority
WO
WIPO (PCT)
Prior art keywords
secondary battery
window
film
exterior member
negative electrode
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2017/037361
Other languages
English (en)
Japanese (ja)
Inventor
貴正 小野
宮木　幸夫
真樹 倉塚
崇弘 白井
隆尚 石松
翔 高橋
田中　俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP2018556218A priority Critical patent/JP6801722B2/ja
Publication of WO2018110067A1 publication Critical patent/WO2018110067A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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 technology relates to a secondary battery using a film-shaped exterior member, and a battery pack, an electric vehicle, an electric power storage system, an electric tool, and an electronic device using the secondary battery.
  • Secondary batteries are not limited to the electronic devices described above, but are also being considered for other uses.
  • a battery pack detachably mounted on an electronic device, an electric vehicle such as an electric vehicle, an electric power storage system such as a household electric power server, and an electric tool such as an electric drill.
  • the laminated film type secondary battery is a secondary battery using a film-shaped exterior member.
  • a battery element is housed inside a film-shaped exterior member, and the battery element includes a positive electrode, a negative electrode, an electrolytic solution, and the like.
  • the film-shaped exterior member Since the film-shaped exterior member has flexibility, it has a property of being easily deformed according to an external force. For this reason, in a laminated film type secondary battery, when gas is generated inside the secondary battery, the secondary battery tends to swell due to deformation of the film-shaped exterior member.
  • a secondary battery includes a battery element including a positive electrode, a negative electrode, and an electrolyte, and a film-shaped exterior member that houses the battery element and includes a window portion that includes a non-porous molten fluororesin. It is equipped with.
  • Each of the battery pack, the electric vehicle, the power storage system, the electric tool, and the electronic device according to the embodiment of the present technology includes a secondary battery, and the secondary battery includes the secondary battery according to the embodiment of the present technology described above. It has the same configuration.
  • the “window” is a part of the film-shaped exterior member, and is exposed to each of the internal environment in which the battery element is accommodated and the external environment in which the battery element is not accommodated.
  • the internal environment is an environment inside the film-shaped exterior member
  • the external environment is an environment outside the film-shaped exterior member.
  • the battery element is housed in the film-shaped exterior member, and the window portion including the non-porous molten fluororesin is provided in the exterior member.
  • Excellent battery characteristics can be obtained.
  • the same effect can also be obtained in the battery pack, the electric vehicle, the power storage system, the electric tool, or the electronic device according to the embodiment of the present technology.
  • effect described here is not necessarily limited, and may be any effect described in the present technology.
  • FIG. 2 is a cross-sectional view illustrating a configuration of an exterior member along line AA illustrated in FIG. 1.
  • FIG. 2 is a cross-sectional view illustrating a configuration of a wound electrode body taken along line BB illustrated in FIG. 1.
  • FIG. 9 is a cross-sectional view illustrating a configuration of an exterior member along the line CC illustrated in FIG. 8.
  • FIG. 9 is a cross-sectional view illustrating a configuration of an exterior member along the line DD illustrated in FIG. 8.
  • It is a block diagram showing the structure of the battery pack shown in FIG. It is a block diagram showing the structure of the application example (battery pack: assembled battery) of a secondary battery.
  • It is a block diagram showing the structure of the application example (electric vehicle) of a secondary battery.
  • It is a block diagram showing the structure of the application example (electric power storage system) of a secondary battery.
  • Secondary battery 1-1.
  • Lithium ion secondary battery 1-2.
  • Modification 2 Secondary battery (second embodiment) 2-1.
  • Modified example 3 Applications of secondary batteries 3-1.
  • Battery pack (single cell) 3-2.
  • Battery pack (assembled battery) 3-3.
  • Lithium ion secondary battery The secondary battery described here is, for example, a lithium ion secondary battery in which the capacity of the negative electrode is obtained by occlusion and release of lithium, which is an electrode reactant.
  • FIG. 1 and FIG. 2 each show a perspective configuration of the secondary battery of the present embodiment.
  • FIG. 1 shows a state before the exterior member 40 is bonded, and the wound electrode body 30 and the exterior member 40 are separated from each other.
  • FIG. 2 shows a state after the exterior member 40 is bonded.
  • FIG. 3 shows a cross-sectional configuration of the exterior member 40 along the line AA shown in FIG.
  • FIG. 4 shows a cross-sectional configuration of the spirally wound electrode body 30 along the line BB shown in FIG.
  • This secondary battery is a laminated film type secondary battery using a film-like exterior member 40.
  • a wound electrode body 30 as a battery element is housed inside an exterior member 40 having a window portion 42. Details of the window 42 will be described later.
  • the wound electrode body 30 for example, as shown in FIG. 4, after the positive electrode 33 and the negative electrode 34 are laminated via the separator 35 and the electrolyte layer 36, the positive electrode 33, the negative electrode 34, the separator 35, and the electrolyte layer 36 are stacked. Is wound. That is, the spirally wound electrode body 30 housed inside the exterior member 40 includes a positive electrode 33, a negative electrode 34, and an electrolyte layer 36, and the electrolyte layer 36 includes an electrolyte solution described later. The outermost peripheral part of the wound electrode body 30 is protected by a protective tape 37, for example.
  • the positive electrode lead 31 is attached to the positive electrode 33, and the positive electrode lead 31 is led out from the inside of the exterior member 40 to the outside.
  • the positive electrode lead 31 includes, for example, any one type or two or more types of conductive materials such as aluminum (Al).
  • the shape of the conductive material is not particularly limited, and is, for example, a thin plate shape or a mesh shape.
  • the negative electrode lead 32 is attached to the negative electrode 34, and the negative electrode lead 32 is led out from the inside of the exterior member 40 to the outside.
  • the negative electrode lead 32 includes any one type or two or more types of conductive materials such as copper (Cu), nickel (Ni), and stainless steel.
  • the shape of the conductive material is the same as that described for the positive electrode lead 31, for example.
  • the positive electrode lead 31 and the negative electrode lead 32 are not shown. Each of the positive electrode lead 31 and the negative electrode lead 32 is led out in the same direction from the inside of the exterior member 40 to the outside, as is apparent from FIG. 1, for example.
  • the exterior member 40 houses the wound electrode body 30 as described above. Since the exterior member 40 is in the form of a film, it has flexibility.
  • the exterior member 40 includes an exterior body 41 provided with the window portion 42 as described above, for example, as shown in FIGS.
  • the exterior body 41 is a body of the exterior member 40 and is a film-like member.
  • the configuration of the exterior body 41 is not particularly limited, but the exterior body 41 is, for example, a multilayer film (laminate film) including an adhesive layer.
  • the exterior body 41 is, for example, a laminate film in which an adhesive layer, a metal layer, and a surface protective layer are laminated in this order from the inside.
  • the wound electrode body 30 is accommodated in the exterior member 40 by bonding the adhesive layers of the exterior body 41 to each other via the wound electrode body 30.
  • the adhesion layer is, for example, a fusion layer.
  • This fusion layer is, for example, a film containing one or more of polymer compounds such as polyethylene and polypropylene.
  • a metal layer is metal foil containing any 1 type or 2 types or more of metal materials, such as aluminum, for example.
  • the surface protective layer is, for example, a film containing any one or more of polymer compounds such as nylon and polyethylene terephthalate.
  • the exterior body 41 is an aluminum laminated film in which, for example, a polyethylene film, an aluminum foil, and a nylon film are laminated in this order from the inside. This is because sufficient adhesiveness and sufficient airtightness can be obtained.
  • the exterior body 41 includes an exterior portion 41A that is a first exterior member that covers the wound electrode body 30 from one side (here, the upper side), and the wound electrode body.
  • the exterior part 41B which is the 2nd exterior member which coat
  • the forming material of the exterior portion 41A and the forming material of the exterior portion 41B may be the same as each other or different from each other.
  • the wound electrode body 30 is housed inside the exterior member 40.
  • a part of the exterior part 41A is, for example, an outer edge part of the exterior part 41A
  • a part of the exterior part 41B is, for example, an outer edge part of the exterior part 41B.
  • the exterior body 41 seals the exterior member 40 and the non-adhesive region 41X where the exterior portions 41A and 41B are not bonded to each other in order to accommodate the wound electrode body 30 inside the exterior member 40.
  • the exterior portions 41A and 41B include an adhesion region 41Y where the exterior portions 41A and 41B are adhered to each other.
  • the adhesion region 41Y is an outer edge region of each of the exterior portions 41A and 41B
  • the non-adhesion region 41X is one of the exterior portions 41A and 41B. It is an area other than the outer edge area (a central area surrounded by the outer edge area).
  • the exterior parts 41A and 41B may be separated from each other or may be connected (integrated) to each other.
  • the exterior body 41 when the exterior portions 41A and 41B are separated from each other is, for example, two films.
  • the exterior body 41 when the exterior portions 41A and 41B are connected to each other is, for example, a single film.
  • the exterior body 41 is a single film.
  • the single film may be originally a single film or a composite film in which two films are connected. Accordingly, the exterior body 41 can be folded, for example, in the direction of the arrow R shown in FIG. In this case, since the exterior body 41 is folded, as described above, the exterior portion 41A covers the wound electrode body 30 from above and the exterior portion 41B covers the wound electrode body 30 from below.
  • the wound electrode body 30 is housed inside the exterior member 40.
  • the exterior portion 41A is provided with, for example, a recessed portion 41P for accommodating the wound electrode body 30. Accordingly, the exterior portion 41A partially protrudes outward, for example, at a location where the recessed portion 41P is provided.
  • the recess 41P is provided in the exterior part 41A, so that the wound electrode body 30 can be easily positioned with respect to the exterior body 41 and the wound electrode body 30 can be easily housed inside the exterior member 40. Because.
  • an adhesive film 50 is used to seal the exterior member 40.
  • the adhesion film 50 is inserted between the exterior body 41 (the exterior portions 41A and 41B) and the positive electrode lead 31, and the adhesion film is similarly disposed between the exterior body 41 and the negative electrode lead 32. 50 is inserted.
  • the adhesive film 50 includes one or more of the adhesive materials in order to prevent outside air from entering the exterior member 40.
  • the adhesive material is a material having adhesiveness to each of the positive electrode lead 31 and the negative electrode lead 32, and is, for example, a polyolefin resin.
  • the type of polyolefin resin is not particularly limited, and examples thereof include polyethylene, polypropylene, modified polyethylene, and modified polypropylene.
  • the window portion 42 mainly functions to prevent water from entering the inside of the exterior member 40 from the outside (waterproof function) and also releases the gas generated inside the exterior member 40 to the outside ( Exhaust function).
  • the water described here is, for example, water and water vapor existing outside the secondary battery.
  • the gas is, for example, carbon dioxide gas (carbon dioxide) generated due to a side reaction such as a decomposition reaction of the electrolytic solution.
  • the window portion 42 is a part of the exterior member 40 and is exposed to each of the internal environment E1 and the external environment E2 as shown in FIG.
  • the internal environment E1 is an environment in which the wound electrode body 30 is housed (an environment inside the exterior member 40). For this reason, the internal environment E ⁇ b> 1 is formed by housing the wound electrode body 30 inside the exterior member 40.
  • the external environment E2 is an environment in which the wound electrode body 30 is not housed (an environment outside the exterior member 40). That is, the window 42 releases gas from the internal environment E1 to the external environment E2 while suppressing water from entering the internal environment E1 from the external environment E2.
  • the exterior member 40 (exterior body 41) has the window portion 42 by using the waterproof function of the window portion 42 and suppressing deterioration of cycle characteristics and the like caused by water while the window portion 42 This is to suppress the swelling of the secondary battery by utilizing the exhaust function of the secondary battery.
  • a machine such as a safety valve, an instrument, and an apparatus, it is possible to easily suppress the deterioration of the cycle characteristics and the like, and it is also possible to easily suppress the swelling of the secondary battery.
  • the number, position, and configuration of the window 42 are not particularly limited.
  • the number of window portions 42 may be only one, or two or more.
  • the number of the window parts 42 is one, for example.
  • the position of the window 42 may be arbitrary.
  • the window part 42 is provided in the hollow part 41P of the exterior main body 41 (exterior part 41A), for example. More specifically, for example, in the case where the depression 41P has one upper surface 41PT and four side surfaces 41PS, the window 42 is provided on the upper surface 41PT.
  • the window part 42 is provided in the non-adhesion area
  • an opening 41K is provided in the exterior body 41, and the window 42 is formed by covering (closing) the opening 41K with a window film 43 that is a film-like window member. That is, the window part 42 contains the window film 43 which obstruct
  • the window 43 is shaded to make it easy to identify the window film 43.
  • the opening 41K is a through hole that allows the internal environment E1 and the external environment E2 to communicate with each other.
  • the opening shape of the opening 41K is not particularly limited, and may be, for example, a circle, an ellipse, a rectangle, or other shapes.
  • the opening shape of the opening 41K is, for example, an ellipse.
  • the size (area) of the opening 41K is not particularly limited and can be arbitrarily set.
  • the window film 43 is a film having the above waterproof function and exhaust function. Accordingly, the window film 43 includes a window functional material.
  • the “window functional material” is a material that can suppress the intrusion of water from the outside of the exterior member 40 to the inside and can release gas from the interior of the exterior member 40 to the outside. More specifically, the window functional material is a material that functions as a barrier film that does not allow water to sufficiently permeate in order to ensure a waterproof function, and sufficient gas such as carbon dioxide is sufficient to ensure an exhaust function. It is a gas-permeable material that can be permeated through the glass. That is, the window functional material is a material having selective permeability with respect to water and gas.
  • This window functional material contains any one kind or two or more kinds of non-porous molten fluororesins.
  • This non-porous molten fluororesin is a general term for fluororesins that do not have one or two or more pores and that have a meltability enough to be melt processed and melt molded. .
  • the kind of the non-porous molten fluororesin is not particularly limited.
  • non-porous tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA) non-porous tetrafluoroethylene / hexafluoropropylene copolymer (FEP) and non-porous tetrafluoroethylene / ethylene copolymer (ETFE).
  • PFA non-porous tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer
  • FEP non-porous tetrafluoroethylene / hexafluoropropylene copolymer
  • ETFE non-porous tetrafluoroethylene / ethylene copolymer
  • non-fluorine polymer compounds such as polyethylene terephthalate (PET) and polypropylene (PP) have too low permselectivity with respect to water and gas as described above compared to molten fluororesin, so that the non-fluorine-based high molecular compound.
  • PET polyethylene terephthalate
  • PP polypropylene
  • Molecular compounds cannot exhibit both the waterproof function and the exhaust function described above.
  • porous PFA, porous FEP, porous ETFE, etc. correspond to a molten fluororesin, they are porous and thus cannot exhibit both the waterproof function and the exhaust function described above.
  • the polymer compound forming the film is porous. Since the state of the pore is not particularly limited, for example, it may be a substantially circular gap or a tubular path extending in a predetermined direction. On the other hand, when one or more pores are not observed inside the film, the polymer compound forming the film is non-porous.
  • the planar shape of the window film 43 is not particularly limited, and may be, for example, a circle, an ellipse, a rectangle, or other shapes. That is, the planar shape of the window film 43 may be the same as the opening shape of the opening 41K, or may be a shape different from the opening shape of the opening 41K. Here, the planar shape of the window film 43 is the same as the opening shape of the opening 41K, for example. For this reason, the planar shape of the window film 43 is an ellipse, for example.
  • the size (area) of the window film 43 is not particularly limited. That is, the area of the window film 43 may be the same as the opening area of the opening 41K or may be larger than the opening area of the opening 41K.
  • the area of the window film 43 is larger than the area of the opening 41K because the window film 43 contains the window functional material (non-porous molten fluororesin). This is because the window film 43 can be attached to the exterior body 41 using an adhesive in order to fix the window film 43 to the exterior body 41.
  • the window film 43 is adhesive so as to close the opening 41K. 44 is affixed to the exterior body 41 via 44.
  • the window film 43 containing a non-porous molten fluororesin generally has another object (here, the exterior main body 41) due to the adhesion resistance unique to the non-porous molten fluororesin. It has a property that it is difficult to adhere to.
  • the adhesive 44 excellent in compatibility (adhesiveness) with the non-porous molten fluororesin, the window film 43 can be sufficiently adhered to the exterior body 41 using the adhesive 44. .
  • the installation position of the window film 43 is not particularly limited.
  • the window film 43 may be disposed inside the exterior body 41 (internal environment E1), or may be disposed outside the exterior body 41 (external environment E2).
  • the window film 43 is preferably disposed inside the exterior body 41. This is because, even if gas is generated inside the secondary battery, the window film 43 is prevented from unintentionally peeling and dropping.
  • the window film 43 is bonded to the inner surface of the exterior body 41 through an adhesive 44, for example.
  • the window film 43 when gas is generated inside the secondary battery, the window film 43 is pushed from the internal environment E1 toward the external environment E2 due to an increase in internal pressure.
  • the window film 43 when the window film 43 is disposed outside the exterior body 41 (see FIG. 6), the window film 43 is positioned in the external environment E2 from the beginning, and the window There is nothing on the outside of the film 43. Therefore, depending on how the internal pressure increases, when the adhesive 44 peels from one or both of the exterior body 41 and the window film 43, the window film 43 may peel from the exterior body 41. Moreover, if the window film 43 peels from the exterior body 41, the window film 43 may fall off from the secondary battery.
  • the window film 43 when the window film 43 is disposed inside the exterior body 41 (see FIG. 3), the window film 43 is located in the internal environment E1, and the exterior body 41 is located outside the window film 43. Existing. In this case, the window film 43 is pressed by the exterior body 41 so as to remain in the internal environment E ⁇ b> 1 at a place where the window film 43 and the exterior body 41 overlap each other. Therefore, the adhesive 44 is difficult to peel from each of the exterior body 41 and the window film 43, and thus the window film 43 is difficult to peel from the exterior body 41. In addition, even if the window film 43 is peeled off from the exterior body 41 due to an increase in internal pressure, the window film 43 still tends to be present in the internal environment E1, and thus the window film 43 is difficult to drop off from the secondary battery. Become.
  • the thickness of the window film 43 is not particularly limited, but is, for example, 10 ⁇ m to 500 ⁇ m, and preferably 10 ⁇ m to 200 ⁇ m.
  • the window film 43 is smaller than 10 ⁇ m, the window film 43 is too thin, so that the window film 43 tends to release the gas when the gas is generated.
  • the window film 43 may be easily deformed, broken, and peeled when the internal pressure is increased.
  • the thickness of the window film 43 is larger than 500 ⁇ m, the window film 43 is too thick, so that the window film 43 is difficult to be deformed, broken and peeled even when the internal pressure is increased. While it is difficult for water to pass through, the window film 43 may be difficult to release gas.
  • the adhesive 44 contains any one kind or two or more kinds of polymer compounds (adhesive material) such as polyolefin resin, epoxy resin, urethane resin, cyanoacrylate and styrene butadiene rubber, for example.
  • polymer compounds such as polyolefin resin, epoxy resin, urethane resin, cyanoacrylate and styrene butadiene rubber, for example.
  • the polyolefin resin is, for example, polypropylene (PP).
  • the state of the adhesive 44 before bonding is not particularly limited, it may be powder, liquid, film, or a mixture of two or more of them. However, in order to make the thickness of the adhesive 44 uniform and to suppress the occurrence of pinholes in the adhesive 44, the state of the adhesive 44 before bonding is liquid or film-like. One or both are preferred.
  • any one kind or two or more kinds of the pre-treatment is applied to the surface of the window film 43. May be given.
  • the kind of this pre-processing is not specifically limited, For example, they are a chemical
  • any one type or two or more types of pretreatments may be applied to the surface of the exterior body 41. Details regarding the preprocessing are as described above, for example.
  • the positive electrode 33 includes a positive electrode current collector 33A and positive electrode active material layers 33B provided on both surfaces of the positive electrode current collector 33A.
  • the positive electrode active material layer 33B may be provided only on one surface of the positive electrode current collector 33A.
  • the positive electrode current collector 33A includes, for example, any one type or two or more types of conductive materials. Although the kind of conductive material is not specifically limited, For example, they are metal materials, such as aluminum, nickel, and stainless steel.
  • the positive electrode current collector 33A may be a single layer or a multilayer.
  • the positive electrode active material layer 33B contains any one or more of positive electrode materials capable of occluding and releasing lithium as a positive electrode active material.
  • the positive electrode active material layer 33B may further include any one type or two or more types of other materials such as a positive electrode binder and a positive electrode conductive agent.
  • the positive electrode material is preferably a lithium-containing compound, and more specifically, preferably one or both of a lithium-containing composite oxide and a lithium-containing phosphate compound. This is because a high energy density can be obtained.
  • the lithium-containing composite oxide is an oxide containing lithium and one or more kinds of other elements (elements other than lithium) as constituent elements.
  • elements elements other than lithium
  • any one of a layered rock salt type and a spinel type It has a crystal structure.
  • the lithium-containing phosphate compound is a phosphate compound containing lithium and one or more other elements as constituent elements, and has, for example, an olivine type crystal structure.
  • the type of other element is not particularly limited as long as it is any one or more of arbitrary elements.
  • the other elements are preferably any one or more of elements belonging to Groups 2 to 15 in the long-period periodic table. More specifically, it is more preferable that the other elements include one or more metal elements of nickel (Ni), cobalt (Co), manganese (Mn), and iron (Fe). preferable. This is because a high voltage can be obtained.
  • lithium-containing composite oxide having a layered rock salt type crystal structure examples include compounds represented by the following formulas (21) to (23).
  • M11 is cobalt (Co), magnesium (Mg), aluminum (Al), boron (B), titanium (Ti), vanadium (V), chromium (Cr), iron (Fe), copper (Cu), zinc (Zn), zirconium (Zr), molybdenum (Mo), tin (Sn), calcium (Ca), strontium (Sr), and tungsten (W), a to e being 0.8 ⁇ a ⁇ 1.2, 0 ⁇ b ⁇ 0.5, 0 ⁇ c ⁇ 0.5, (b + c) ⁇ 1, ⁇ 0.1 ⁇ d ⁇ 0.2 and 0 ⁇ e ⁇ 0.1 are satisfied.
  • the composition of lithium varies depending on the charge / discharge state, and a is the value of the fully discharged state.
  • M12 is cobalt (Co), manganese (Mn), magnesium (Mg), aluminum (Al), boron (B), titanium (Ti), vanadium (V), chromium (Cr), iron (Fe), copper (Cu), zinc (Zn), molybdenum (Mo), tin (Sn), calcium (Ca), strontium (Sr), and tungsten (W), and a to d are 0.8.
  • composition of lithium depends on the charge / discharge state Unlikely, a is the value of the fully discharged state.
  • M13 is nickel (Ni), manganese (Mn), magnesium (Mg), aluminum (Al), boron (B), titanium (Ti), vanadium (V), chromium (Cr), iron (Fe), copper (Cu), zinc (Zn), molybdenum (Mo), tin (Sn), calcium (Ca), strontium (Sr), and tungsten (W), and a to d are 0.8.
  • the lithium-containing composite oxide having a layered rock salt type crystal structure may be, for example, a compound represented by the following formula (24). This compound is a lithium nickel-containing composite oxide containing nickel as a constituent element and having a relatively high nickel content.
  • M is boron (B), magnesium (Mg), aluminum (Al), titanium (Ti), chromium (Cr), manganese (Mn), gallium (Ga), yttrium (Y), zirconium (Zr), molybdenum (Mo), strontium (Sr), cesium (Cs), barium (Ba), indium (In), and antimony (Sb), and
  • X is a halogen element
  • x, y, z , A and b are 0.8 ⁇ x ⁇ 1.2, 0 ⁇ y ⁇ 1.0, 0.5 ⁇ z ⁇ 1.0, 0 ⁇ a ⁇ 1.0, 1.8 ⁇ b ⁇ 2. 2 and y ⁇ z are satisfied.
  • lithium-containing composite oxide having a layered rock salt type crystal structure LiNiO 2 , LiCoO 2 , LiCo 0.98 Al 0.01 Mg 0.01 O 2 , LiNi 0.5 Co 0.2 Mn 0.3 O 2 , LiNi 0.8 Co 0.15 Al 0.05 O 2.
  • LiNi 0.33 Co 0.33 Mn 0.33 O 2 Li 1.2 Mn 0.52 Co 0.175 Ni 0.1 O 2 and Li 1.15 (Mn 0.65 Ni 0.22 Co 0.13 ) O 2 .
  • the lithium-containing composite oxide having a layered rock salt type crystal structure contains nickel, cobalt, manganese, and aluminum as constituent elements
  • the atomic ratio of nickel is preferably 50 atomic% or more. This is because a high energy density can be obtained.
  • the lithium-containing composite oxide having a spinel crystal structure is, for example, a compound represented by the following formula (25).
  • M14 is cobalt (Co), nickel (Ni), magnesium (Mg), aluminum (Al), boron (B), titanium (Ti), vanadium (V), chromium (Cr), iron (Fe), copper At least one of (Cu), zinc (Zn), molybdenum (Mo), tin (Sn), calcium (Ca), strontium (Sr), and tungsten (W), wherein a to d are 0.9.
  • composition of lithium differs depending on the charge / discharge state, and a Is the value of the fully discharged state.
  • lithium-containing composite oxide having a spinel crystal structure examples include LiMn 2 O 4 .
  • lithium-containing phosphate compound having an olivine type crystal structure examples include a compound represented by the following formula (26).
  • Li a M15PO 4 (26) (M15 is cobalt (Co), manganese (Mn), iron (Fe), nickel (Ni), magnesium (Mg), aluminum (Al), boron (B), titanium (Ti), vanadium (V), niobium It is at least one of (Nb), copper (Cu), zinc (Zn), molybdenum (Mo), calcium (Ca), strontium (Sr), tungsten (W), and zirconium (Zr). 0.9 ⁇ a ⁇ 1.1, where the composition of lithium varies depending on the charge / discharge state, and a is the value of the complete discharge state.)
  • lithium-containing phosphate compound having an olivine type crystal structure examples include LiFePO 4 , LiMnPO 4 , LiFe 0.5 Mn 0.5 PO 4, and LiFe 0.3 Mn 0.7 PO 4 .
  • the lithium-containing composite oxide may be a compound represented by the following formula (27).
  • the positive electrode material may be any one kind or two or more kinds of oxides, disulfides, chalcogenides, conductive polymers, and the like.
  • oxide include titanium oxide, vanadium oxide, and manganese dioxide.
  • disulfide include titanium disulfide and molybdenum sulfide.
  • chalcogenide is niobium selenide.
  • conductive polymer include sulfur, polyaniline, and polythiophene.
  • the positive electrode material may be a material other than the above.
  • the positive electrode binder contains, for example, any one or more of synthetic rubber and polymer compound.
  • synthetic rubber include styrene butadiene rubber, fluorine rubber, and ethylene propylene diene.
  • polymer compound include polyvinylidene fluoride and polyimide.
  • the positive electrode conductive agent includes, for example, one or more of carbon materials.
  • the carbon material include graphite, carbon black, acetylene black, and ketjen black.
  • the positive electrode conductive agent may be a metal material or a conductive polymer as long as it is a conductive material.
  • the negative electrode 22 includes a negative electrode current collector 34A and negative electrode active material layers 34B provided on both surfaces of the negative electrode current collector 34A.
  • the negative electrode active material layer 34B may be provided only on one surface of the negative electrode current collector 34A.
  • the negative electrode current collector 34A includes, for example, any one type or two or more types of conductive materials. Although the kind of electrically conductive material is not specifically limited, For example, they are metal materials, such as copper, aluminum, nickel, and stainless steel.
  • the negative electrode current collector 34A may be a single layer or a multilayer.
  • the surface of the negative electrode current collector 34A is preferably roughened. This is because the adhesion of the negative electrode active material layer 34B to the negative electrode current collector 34A is improved by a so-called anchor effect. In this case, the surface of the negative electrode current collector 34A only needs to be roughened at least in a region facing the negative electrode active material layer 34B.
  • the roughening method is, for example, a method of forming fine particles using electrolytic treatment. In the electrolytic treatment, fine particles are formed on the surface of the negative electrode current collector 34A by an electrolysis method in an electrolytic bath, so that the surface of the negative electrode current collector 34A is provided with irregularities.
  • a copper foil produced by an electrolytic method is generally called an electrolytic copper foil.
  • the negative electrode active material layer 34B contains any one or more of negative electrode materials capable of occluding and releasing lithium as a negative electrode active material.
  • the negative electrode active material layer 34B may further include any one kind or two or more kinds of other materials such as a negative electrode binder and a negative electrode conductive agent.
  • the chargeable capacity of the negative electrode material is preferably larger than the discharge capacity of the positive electrode 33. That is, the electrochemical equivalent of the negative electrode material capable of occluding and releasing lithium is preferably larger than the electrochemical equivalent of the positive electrode 33.
  • the negative electrode material is, for example, one or more of carbon materials. This is because the change in crystal structure at the time of occlusion and release of lithium is very small, so that a high energy density can be obtained stably. Moreover, since the carbon material also functions as a negative electrode conductive agent, the conductivity of the negative electrode active material layer 34B is improved.
  • Examples of the carbon material include graphitizable carbon, non-graphitizable carbon, and graphite.
  • the interplanar spacing of the (002) plane in non-graphitizable carbon is preferably 0.37 nm or more, and the interplanar spacing of the (002) plane in graphite is preferably 0.34 nm or less.
  • examples of the carbon material include pyrolytic carbons, cokes, glassy carbon fibers, organic polymer compound fired bodies, activated carbon, and carbon blacks.
  • the cokes include pitch coke, needle coke, petroleum coke and the like.
  • the organic polymer compound fired body is obtained by firing (carbonizing) a polymer compound such as a phenol resin and a furan resin at an appropriate temperature.
  • the carbon material may be low crystalline carbon heat-treated at a temperature of about 1000 ° C. or less, or may be amorphous carbon.
  • the shape of the carbon material may be any of a fibrous shape, a spherical shape, a granular shape, and a scale shape.
  • the negative electrode material is, for example, a material (metal material) containing any one or more of metal elements and metalloid elements as constituent elements. This is because a high energy density can be obtained.
  • the metal-based material may be any of a simple substance, an alloy, and a compound, or may be two or more of them, or may be a material having at least a part of one or two or more of them.
  • the alloy includes a material including one or more metal elements and one or more metalloid elements in addition to a material composed of two or more metal elements.
  • the alloy may contain a nonmetallic element.
  • the structure of the metal-based material is, for example, a solid solution, a eutectic (eutectic mixture), an intermetallic compound, and two or more kinds of coexisting materials.
  • the metal element and metalloid element described above are, for example, any one or more metal elements and metalloid elements capable of forming an alloy with lithium. Specifically, for example, magnesium (Mg), boron (B), aluminum (Al), gallium (Ga), indium (In), silicon (Si), germanium (Ge), tin (Sn), lead (Pb) ), Bismuth (Bi), cadmium (Cd), silver (Ag), zinc, hafnium (Hf), zirconium, yttrium (Y), palladium (Pd) and platinum (Pt).
  • silicon and tin is preferable. This is because the ability to occlude and release lithium is excellent, so that a significantly high energy density can be obtained.
  • the material containing one or both of silicon and tin as a constituent element may be any of a simple substance, an alloy, and a compound of silicon, or any of a simple substance, an alloy, and a compound of tin. These may be two or more types, or may be a material having at least a part of one or two or more of them.
  • the simple substance described here means a simple substance (which may contain a small amount of impurities) in a general sense, and does not necessarily mean 100% purity.
  • the alloy of silicon is, for example, any one of tin, nickel, copper, iron, cobalt, manganese, zinc, indium, silver, titanium, germanium, bismuth, antimony, chromium and the like as a constituent element other than silicon or Includes two or more.
  • the compound of silicon contains, for example, one or more of carbon and oxygen as constituent elements other than silicon.
  • the compound of silicon may contain any 1 type or 2 types or more of the series of elements demonstrated regarding the alloy of silicon as structural elements other than silicon, for example.
  • silicon alloys and silicon compounds are SiB 4 , SiB 6 , Mg 2 Si, Ni 2 Si, TiSi 2 , MoSi 2 , CoSi 2 , NiSi 2 , CaSi 2 , CrSi 2 , Cu 5 Si, FeSi 2 , MnSi 2 , NbSi 2 , TaSi 2 , VSi 2 , WSi 2 , ZnSi 2 , SiC, Si 3 N 4 , Si 2 N 2 O, SiO v (0 ⁇ v ⁇ 2), and LiSiO.
  • v in SiO v may be 0.2 ⁇ v ⁇ 1.4.
  • the alloy of tin for example, as a constituent element other than tin, any one of silicon, nickel, copper, iron, cobalt, manganese, zinc, indium, silver, titanium, germanium, bismuth, antimony, chromium, etc. Includes two or more.
  • the tin compound contains, for example, one or more of carbon and oxygen as constituent elements other than tin.
  • the compound of tin may contain any 1 type in the series of elements demonstrated regarding the alloy of tin, or 2 or more types as structural elements other than tin, for example.
  • tin alloy and the tin compound include SnO w (0 ⁇ w ⁇ 2), SnSiO 3 , LiSnO, and Mg 2 Sn.
  • the material containing tin as a constituent element is preferably, for example, a material (Sn-containing material) containing a second constituent element and a third constituent element together with tin which is the first constituent element.
  • the second constituent element is, for example, cobalt, iron, magnesium, titanium, vanadium, chromium, manganese, nickel, copper, zinc, gallium, zirconium, niobium, molybdenum, silver, indium, cesium (Ce), hafnium (Hf), Any one or more of tantalum, tungsten, bismuth, silicon and the like are included.
  • the third constituent element includes, for example, one or more of boron, carbon, aluminum, phosphorus, and the like. This is because, when the Sn-containing material contains the second and third constituent elements, a high battery capacity and excellent cycle characteristics can be obtained.
  • the Sn-containing material is preferably a material (SnCoC-containing material) containing tin, cobalt, and carbon as constituent elements.
  • the carbon content is 9.9 mass% to 29.7 mass%, and the ratio of the content of tin and cobalt (Co / (Sn + Co)) is 20 mass% to 70 mass%. . This is because a high energy density can be obtained.
  • the SnCoC-containing material has a phase containing tin, cobalt, and carbon, and the phase is preferably low crystalline or amorphous. Since this phase is a reaction phase capable of reacting with lithium, excellent characteristics can be obtained based on the presence of the reaction phase.
  • the half-width (diffraction angle 2 ⁇ ) of the diffraction peak obtained by X-ray diffraction of this reaction phase is 1 ° or more when CuK ⁇ ray is used as the specific X-ray and the insertion speed is 1 ° / min. Is preferred. This is because lithium is occluded and released more smoothly and the reactivity with the electrolytic solution is reduced.
  • the SnCoC-containing material may include a phase containing a simple substance or a part of each constituent element in addition to the low crystalline or amorphous phase.
  • Such a reaction phase contains, for example, each of the above-described constituent elements, and is considered to be low crystallized or amorphous mainly due to the presence of carbon.
  • the SnCoC-containing material it is preferable that at least a part of carbon as a constituent element is bonded to a metal element or a metalloid element as another constituent element. This is because aggregation or crystallization of tin or the like is suppressed.
  • the bonding state of the elements can be confirmed using, for example, X-ray photoelectron spectroscopy (XPS).
  • XPS X-ray photoelectron spectroscopy
  • Al—K ⁇ ray or Mg—K ⁇ ray is used as the soft X-ray.
  • the energy calibration is performed so that the peak of the 4f orbit (Au4f) of the gold atom is obtained at 84.0 eV.
  • the C1s peak of the surface-contaminated carbon is set to 284.8 eV, and the peak is used as an energy reference.
  • the waveform of the C1s peak is obtained in a form including the surface contamination carbon peak and the carbon peak in the SnCoC-containing material. For this reason, for example, both peaks are separated by analyzing using commercially available software. In the waveform analysis, the position of the main peak existing on the lowest bound energy side is used as the energy reference (284.8 eV).
  • This SnCoC-containing material is not limited to a material (SnCoC) whose constituent elements are only tin, cobalt and carbon.
  • This SnCoC-containing material is, for example, any one of silicon, iron, nickel, chromium, indium, niobium, germanium, titanium, molybdenum, aluminum, phosphorus, gallium, and bismuth in addition to tin, cobalt, and carbon
  • One kind or two or more kinds may be included as constituent elements.
  • SnCoC-containing materials materials containing tin, cobalt, iron and carbon as constituent elements
  • SnCoFeC-containing materials materials containing tin, cobalt, iron and carbon as constituent elements
  • the composition of the SnCoFeC-containing material is arbitrary.
  • the iron content is set to be small, the carbon content is 9.9 mass% to 29.7 mass%, and the iron content is 0.3 mass% to 5.9 mass%.
  • the content ratio of tin and cobalt (Co / (Sn + Co)) is 30% by mass to 70% by mass.
  • the carbon content is 11.9% to 29.7% by mass
  • the ratio of the content of tin, cobalt and iron ((Co + Fe) / (Sn + Co + Fe)) Is 26.4% by mass to 48.5% by mass
  • the content ratio of cobalt and iron (Co / (Co + Fe)) is 9.9% by mass to 79.5% by mass.
  • the physical properties (half-value width, etc.) of the SnCoFeC-containing material are the same as the above-described physical properties of the SnCoC-containing material.
  • the negative electrode material may be any one kind or two or more kinds of metal oxides and polymer compounds, for example.
  • the metal oxide include iron oxide, ruthenium oxide, and molybdenum oxide.
  • the polymer compound include polyacetylene, polyaniline, and polypyrrole.
  • the negative electrode material preferably contains both a carbon material and a metal-based material for the following reasons.
  • Metal materials in particular, materials containing one or both of silicon and tin as constituent elements have the advantage of high theoretical capacity, but they have a concern that they tend to violently expand and contract during charging and discharging.
  • the carbon material has a concern that the theoretical capacity is low, but has an advantage that it is difficult to expand and contract during charging and discharging. Therefore, by using both a carbon material and a metal-based material, expansion and contraction during charging and discharging are suppressed while obtaining a high theoretical capacity (in other words, battery capacity).
  • the negative electrode active material layer 34B is formed by any one method or two or more methods among, for example, a coating method, a gas phase method, a liquid phase method, a thermal spray method, and a firing method (sintering method).
  • the coating method is, for example, a method in which a particle (powder) negative electrode active material is mixed with a negative electrode binder and the mixture is dispersed in an organic solvent and then applied to the negative electrode current collector 34A.
  • the vapor phase method include a physical deposition method and a chemical deposition method.
  • a vacuum deposition method for example, a vacuum deposition method, a sputtering method, an ion plating method, a laser ablation method, a thermal chemical vapor deposition, a chemical vapor deposition (CVD) method, and a plasma chemical vapor deposition method.
  • the liquid phase method include an electrolytic plating method and an electroless plating method.
  • the thermal spraying method is a method of spraying a molten or semi-molten negative electrode active material onto the negative electrode current collector 34A.
  • the firing method is, for example, a method in which a mixture dispersed in an organic solvent or the like is applied to the negative electrode current collector 34A using a coating method, and then heat-treated at a temperature higher than the melting point of the negative electrode binder or the like.
  • an atmosphere firing method, a reaction firing method, a hot press firing method, or the like can be used.
  • the electrochemical equivalent of the negative electrode material capable of inserting and extracting lithium is , Greater than the electrochemical equivalent of the positive electrode.
  • the open circuit voltage at the time of full charge that is, the battery voltage
  • the same positive electrode active material is used compared to the case where the open circuit voltage at the time of full charge is 4.20 V.
  • the amounts of the positive electrode active material and the negative electrode active material are adjusted accordingly. Thereby, a high energy density is obtained.
  • the open circuit voltage (charge end voltage) at the time of full charge is not particularly limited, but is preferably 4.2 V or more as described above. Especially, it is preferable that it is 4.25V or more at the time of complete charge, and it is more preferable that it is 4.35V or more. This is because even if the open circuit voltage at the time of full charge is remarkably increased, an advantage based on the optimization of the mixing ratio of the electrolyte salt and ethylene carbonate can be obtained, so that excellent battery characteristics can be obtained.
  • the discharge end voltage is not specifically limited, For example, it is 3.0 V or less.
  • the separator 35 is disposed between the positive electrode 33 and the negative electrode 34.
  • the separator 35 mainly separates the positive electrode 33 and the negative electrode 34 and allows lithium ions to pass through while preventing a short circuit of current due to contact between the two electrodes.
  • the separator 35 is, for example, one kind or two or more kinds of porous films such as synthetic resin and ceramic, and may be a laminated film of two or more kinds of porous films.
  • the synthetic resin include polytetrafluoroethylene, polypropylene, and polyethylene.
  • the separator 35 may include, for example, the above-described porous film (base material layer) and a polymer compound layer provided on one or both surfaces of the base material layer. This is because the adhesion of the separator 35 to each of the positive electrode 33 and the negative electrode 34 is improved, so that the distortion of the wound electrode body 30 is suppressed. As a result, the decomposition reaction of the electrolytic solution is suppressed, and the leakage of the electrolytic solution impregnated in the base material layer is also suppressed. Swelling is suppressed.
  • the polymer compound layer contains any one kind or two or more kinds of polymer compounds such as polyvinylidene fluoride. This is because it has excellent physical strength and is electrochemically stable.
  • the polymer compound is not limited to polyvinylidene fluoride.
  • the substrate layer is dried.
  • the base material layer may contain any one kind or two or more kinds of insulating particles such as inorganic particles. Examples of the inorganic particles include aluminum oxide, aluminum nitride, boehmite, and talc.
  • the electrolyte layer 36 contains an electrolytic solution and a polymer compound.
  • the electrolyte layer 36 described here is a so-called gel electrolyte, and an electrolyte solution is held in the electrolyte layer 36 by a polymer compound. This is because high ionic conductivity (for example, 1 mS / cm or more at room temperature) is obtained and leakage of the electrolytic solution is prevented.
  • the electrolyte layer 36 may further include any one kind or two or more kinds of other materials such as additives.
  • the electrolytic solution contains a solvent and an electrolyte salt.
  • the electrolytic solution may further include any one or more of other materials such as additives.
  • the solvent contains any one or more of nonaqueous solvents such as organic solvents.
  • the electrolytic solution containing the nonaqueous solvent is a so-called nonaqueous electrolytic solution.
  • non-aqueous solvent examples include cyclic carbonate ester, chain carbonate ester, lactone, chain carboxylate ester, and nitrile (mononitrile). This is because excellent battery capacity, cycle characteristics, storage characteristics, and the like can be obtained.
  • the cyclic carbonate is, for example, ethylene carbonate, propylene carbonate, butylene carbonate, or the like.
  • Examples of the chain ester carbonate include dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, and methyl propyl carbonate.
  • Examples of the lactone include ⁇ -butyrolactone and ⁇ -valerolactone.
  • Examples of the chain carboxylic acid ester include methyl acetate, ethyl acetate, methyl propionate, ethyl propionate, methyl butyrate, methyl isobutyrate, methyl trimethyl acetate, and ethyl trimethyl acetate.
  • Nitriles are, for example, acetonitrile, methoxyacetonitrile, 3-methoxypropionitrile and the like.
  • non-aqueous solvents include, for example, 1,2-dimethoxyethane, tetrahydrofuran, 2-methyltetrahydrofuran, tetrahydropyran, 1,3-dioxolane, 4-methyl-1,3-dioxolane, 1,3-dioxane, 1 , 4-dioxane, N, N-dimethylformamide, N-methylpyrrolidinone, N-methyloxazolidinone, N, N′-dimethylimidazolidinone, nitromethane, nitroethane, sulfolane, trimethyl phosphate and dimethyl sulfoxide. This is because similar advantages can be obtained.
  • the solvent preferably contains one or more of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, and ethyl methyl carbonate.
  • high battery capacity, excellent cycle characteristics, and excellent storage characteristics can be obtained.
  • high viscosity (high dielectric constant) solvents such as ethylene carbonate and propylene carbonate (for example, dielectric constant ⁇ ⁇ 30) and low viscosity solvents such as dimethyl carbonate, ethyl methyl carbonate and diethyl carbonate (for example, viscosity ⁇ 1 mPas).
  • -A combination with s is more preferred. This is because the dissociation property of the electrolyte salt and the ion mobility are improved.
  • the solvent includes unsaturated cyclic carbonates, halogenated carbonates, sulfonate esters, acid anhydrides, dicyano compounds (dinitrile compounds), diisocyanate compounds, phosphate esters, and chain compounds having a carbon-carbon triple bond. Any one kind or two kinds or more may be included. This is because the chemical stability of the electrolytic solution is improved.
  • the unsaturated cyclic carbonate is a cyclic carbonate containing one or more unsaturated bonds (carbon-carbon double bond or carbon-carbon triple bond).
  • examples of the unsaturated cyclic carbonate include vinylene carbonate, vinyl ethylene carbonate, and methylene ethylene carbonate.
  • the content of the unsaturated cyclic carbonate in the solvent is not particularly limited, but is, for example, 0.01% by weight to 10% by weight.
  • the halogenated carbonate is a cyclic or chain carbonate containing one or more halogens as a constituent element.
  • the number of the two or more halogens may be only one or two or more.
  • cyclic halogenated carbonates include 4-fluoro-1,3-dioxolan-2-one and 4,5-difluoro-1,3-dioxolan-2-one.
  • chain halogenated carbonate include fluoromethyl methyl carbonate, bis (fluoromethyl) carbonate, and difluoromethyl methyl carbonate.
  • the content of the halogenated carbonate in the solvent is not particularly limited, but is, for example, 0.01% by weight to 50% by weight.
  • sulfonate ester examples include a monosulfonate ester and a disulfonate ester.
  • the content of the sulfonic acid ester in the solvent is not particularly limited, but is, for example, 0.01% by weight to 10% by weight.
  • the monosulfonic acid ester may be a cyclic monosulfonic acid ester or a chain monosulfonic acid ester.
  • Cyclic monosulfonates are, for example, sultone such as 1,3-propane sultone and 1,3-propene sultone.
  • the chain monosulfonic acid ester is, for example, a compound in which a cyclic monosulfonic acid ester is cleaved on the way.
  • the disulfonic acid ester may be a cyclic disulfonic acid ester or a chain disulfonic acid ester.
  • Examples of the acid anhydride include carboxylic acid anhydride, disulfonic acid anhydride, and carboxylic acid sulfonic acid anhydride.
  • Examples of the carboxylic acid anhydride include succinic anhydride, glutaric anhydride, and maleic anhydride.
  • Examples of the disulfonic anhydride include ethanedisulfonic anhydride and propanedisulfonic anhydride.
  • Examples of the carboxylic acid sulfonic acid anhydride include anhydrous sulfobenzoic acid, anhydrous sulfopropionic acid, and anhydrous sulfobutyric acid.
  • the content of the acid anhydride in the solvent is not particularly limited, but is, for example, 0.5% by weight to 5% by weight.
  • the dinitrile compound is, for example, a compound represented by NC—C m H 2m —CN (m is an integer of 1 or more).
  • This dinitrile compound includes, for example, succinonitrile (NC-C 2 H 4 -CN), glutaronitrile (NC-C 3 H 6 -CN), adiponitrile (NC-C 4 H 8 -CN) and phthalonitrile ( NC-C 6 H 4 -CN).
  • the content of the dinitrile compound in the solvent is not particularly limited, but is, for example, 0.5% by weight to 5% by weight.
  • the diisocyanate compound is, for example, a compound represented by OCN—C n H 2n —NCO (n is an integer of 1 or more).
  • This diisocyanate compound is, for example, hexamethylene diisocyanate (OCN—C 6 H 12 —NCO).
  • the content of the diisocyanate compound in the solvent is not particularly limited and is, for example, 0.5% by weight to 5% by weight.
  • phosphate ester examples include trimethyl phosphate and triethyl phosphate.
  • the content of the phosphate ester in the solvent is not particularly limited, and is, for example, 0.5% by weight to 5% by weight.
  • a chain compound having a carbon-carbon triple bond is a chain compound having one or more carbon-carbon triple bonds (—C ⁇ C—).
  • the content of the chain compound having a carbon-carbon triple bond in the solvent is not particularly limited, but is, for example, 0.5% by weight to 5% by weight.
  • the electrolyte salt includes, for example, any one kind or two or more kinds of salts such as a lithium salt.
  • the electrolyte salt may contain a salt other than the lithium salt, for example.
  • the salt other than lithium include salts of light metals other than lithium.
  • lithium salt examples include lithium hexafluorophosphate (LiPF 6 ), lithium tetrafluoroborate (LiBF 4 ), lithium perchlorate (LiClO 4 ), lithium hexafluoroarsenate (LiAsF 6 ), and tetraphenyl.
  • Lithium borate LiB (C 6 H 5 ) 4
  • lithium methanesulfonate LiCH 3 SO 3
  • lithium trifluoromethanesulfonate LiCF 3 SO 3
  • lithium tetrachloroaluminate LiAlCl 4
  • hexafluoride examples include dilithium silicate (Li 2 SiF 6 ), lithium chloride (LiCl), and lithium bromide (LiBr). This is because excellent battery capacity, cycle characteristics, storage characteristics, and the like can be obtained.
  • lithium hexafluorophosphate lithium tetrafluoroborate, lithium perchlorate and lithium hexafluoroarsenate are preferable, and lithium hexafluorophosphate is more preferable. . This is because a higher effect can be obtained because the internal resistance is lowered.
  • the content of the electrolyte salt is not particularly limited, but is preferably 0.3 mol / kg to 3.0 mol / kg with respect to the solvent. This is because high ionic conductivity is obtained.
  • the solvent contained in the electrolytic solution is a wide concept including not only a liquid material but also a material having ion conductivity capable of dissociating the electrolyte salt. . Therefore, when using a polymer compound having ion conductivity, the polymer compound is also included in the non-aqueous solvent.
  • polymer compound examples include polyacrylonitrile, polyvinylidene fluoride, polytetrafluoroethylene, polyhexafluoropropylene, polyethylene oxide, polypropylene oxide, polyphosphazene, polysiloxane, polyvinyl fluoride, polyvinyl acetate, polyvinyl alcohol, polymethacryl. It includes any one or more of methyl acid, polyacrylic acid, polymethacrylic acid, styrene-butadiene rubber, nitrile-butadiene rubber, polystyrene and polycarbonate. In addition, the polymer compound may be a copolymer.
  • This copolymer is, for example, a copolymer of vinylidene fluoride and hexafluoropyrene.
  • a copolymer of vinylidene fluoride and hexafluoropyrene is preferable. This is because it is electrochemically stable.
  • electrolyte layer 36 may replace with the electrolyte layer 36 and electrolyte solution may be used as it is.
  • the wound electrode body 30 is impregnated with the electrolytic solution.
  • This secondary battery operates as follows, for example.
  • lithium ions are released from the positive electrode 33 and the lithium ions are occluded in the negative electrode 34 through the electrolyte layer 36.
  • lithium ions are released from the negative electrode 34 and the lithium ions are occluded in the positive electrode 33 through the electrolyte layer 36.
  • the secondary battery provided with the gel electrolyte layer 36 is manufactured, for example, by the following three types of procedures.
  • a positive electrode active material and, if necessary, a positive electrode binder and a positive electrode conductive agent are mixed to obtain a positive electrode mixture.
  • a positive electrode mixture slurry is obtained by dispersing the positive electrode mixture in an organic solvent or the like.
  • the positive electrode mixture slurry is dried to form the positive electrode active material layer 33B.
  • the positive electrode active material layer 33B is compression molded using a roll press or the like while heating the positive electrode active material layer 33B as necessary. In this case, compression molding may be repeated a plurality of times.
  • the negative electrode active material layer 34B is formed on both surfaces of the negative electrode current collector 34A by the same procedure as that of the positive electrode 33 described above. Specifically, first, by mixing a negative electrode active material, a negative positive electrode binder, a negative electrode conductive agent, and the like to form a negative electrode mixture, by dispersing the negative electrode mixture in an organic solvent, A paste-like negative electrode mixture slurry is obtained. Subsequently, after applying the negative electrode mixture slurry to both surfaces of the negative electrode current collector 34A, the negative electrode mixture slurry is dried to form the negative electrode active material layer 34B. Finally, the negative electrode active material layer 34B is compression molded using a roll press or the like.
  • a precursor solution is prepared by mixing an electrolyte solution, a polymer compound, an organic solvent, and the like. Then, after apply
  • the positive electrode lead 31 is attached to the positive electrode current collector 33A using a welding method or the like, and the negative electrode lead 32 is attached to the negative electrode current collector 34A using a welding method or the like.
  • the positive electrode 33 and the negative electrode 34 are laminated via the separator 35, the positive electrode 33, the negative electrode 34 and the separator 35 are wound to form the wound electrode body 30.
  • the protective tape 37 is attached to the outermost peripheral portion of the wound electrode body 30.
  • the exterior member 40 so as to sandwich the wound electrode body 30 using the exterior member 40 provided with the window portion 42, the outer edge portions of the exterior member 40 are bonded to each other using a heat fusion method or the like.
  • the wound electrode body 30 is sealed inside the exterior member 40 by bonding.
  • the adhesion film 50 is inserted between the positive electrode lead 31 and the exterior member 40, and the adhesion film 50 is inserted between the negative electrode lead 32 and the exterior member 40.
  • the positive electrode 33 and the negative electrode 34 are laminated via the separator 35 and then wound to produce a wound body that is a precursor of the wound electrode body 30, and then the outermost periphery of the wound body A protective tape 37 is affixed to the part.
  • the exterior member 40 after folding the exterior member 40 so as to sandwich the wound electrode body 30 using the exterior member 40 provided with the window portion 42, one side of the exterior member 40 using the heat fusion method or the like is used.
  • the wound body is housed inside the bag-shaped exterior member 40 by pasting the remaining outer edge parts excluding the outer edge part.
  • an electrolyte composition is prepared by mixing an electrolytic solution, a monomer that is a raw material of the polymer compound, a polymerization initiator, and other materials such as a polymerization inhibitor as necessary.
  • the electrolyte composition is injected into the bag-shaped exterior member 40, the exterior member 40 is sealed using a heat fusion method or the like.
  • the polymer is formed by thermally polymerizing the monomer. Since the electrolytic solution is held by the polymer compound, the gel electrolyte layer 36 is formed. Therefore, a laminated film type secondary battery is completed.
  • a wound body is produced by the same procedure as the second procedure described above, except that the separator 35 on which the polymer compound layer is formed is used.
  • the wound body is accommodated in the bag-shaped exterior member 40 provided with 42.
  • the exterior member 40 is sealed using a heat fusion method or the like. Subsequently, by heating the exterior member 40 while applying a load, the separator 35 is brought into close contact with the positive electrode 33 through the polymer compound layer, and the separator 35 is brought into close contact with the negative electrode 34 through the polymer compound layer. Thereby, each of the polymer compound layers is impregnated with the electrolytic solution, and each of the polymer compound layers is gelled, so that the electrolyte layer 36 is formed. Therefore, a laminated film type secondary battery is completed.
  • the swollenness of the secondary battery is suppressed as compared with the first procedure.
  • the solvent, the monomer (the raw material of the polymer compound) and the like are less likely to remain in the electrolyte layer 36, and thus the formation process of the polymer compound is well controlled. . For this reason, each of the positive electrode 33, the negative electrode 34, and the separator 35 and the electrolyte layer 36 are easily adhered to each other.
  • the wound electrode body 30 is housed inside the film-shaped exterior member 40, and the window portion includes a window functional material (non-porous molten fluororesin). 42 (window film 43) is provided on the exterior member 40 (exterior body 41). Therefore, excellent battery characteristics can be obtained for the reason described below.
  • the exterior member 40 When the exterior member 40 is not provided with the window 42, when a gas such as carbon dioxide is generated inside the secondary battery due to a side reaction such as a decomposition reaction of the electrolytic solution, there is no escape space for the gas. Therefore, gas is accumulated inside the secondary battery. In this case, as the internal pressure increases, the exterior member 40 is deformed so as to protrude from the internal environment E1 toward the external environment E2, so that the secondary battery swells.
  • the exterior member 40 is provided with the window 42, as described above, even if gas is generated inside the secondary battery, the gas is generated by utilizing the exhaust function of the window 42. Is discharged to the outside, so that the secondary battery is prevented from swelling.
  • the opening 41K is provided in the exterior member (the exterior body 41)
  • the waterproof function of the window 42 is used.
  • the use of the window portion 42 suppresses swelling of the secondary battery and suppresses deterioration of cycle characteristics, etc., and thus excellent battery characteristics. Is obtained.
  • the window functional material contains any one or more of non-porous PFA, non-porous FEP, non-porous ETFE, etc.
  • the window 42 since it becomes easier to suppress the intrusion of water and the window portion 42 more easily releases the gas, a higher effect can be obtained.
  • the opening part 41K is provided in the exterior main body 41 and the window part 42 is formed by the window film 43 containing a window functional material covering the opening part 41K, the opening part 41K (the window film 43). ), The gas is sufficiently released, so that a higher effect can be obtained.
  • the window film 43 has an area larger than the area of the opening 41 ⁇ / b> K and the window film 43 is attached to the exterior body 41 via the adhesive 44, the exterior body 41.
  • the window film 43 is firmly fixed to the screen. Therefore, since the waterproof function and the exhaust function of the window part 42 are stably exhibited, a higher effect can be obtained.
  • the thickness of the window film 43 is 10 ⁇ m to 500 ⁇ m, a sufficient waterproof function and a sufficient exhaust function can be obtained while ensuring the physical durability of the window film 43, so that a higher effect can be obtained. Can do.
  • Lithium metal secondary battery a laminated film type lithium metal secondary battery in which the capacity of the negative electrode 34 is obtained by precipitation and dissolution of lithium metal.
  • This secondary battery has the same configuration as the above-described laminate film type lithium ion secondary battery except that the negative electrode active material layer 34B is formed of lithium metal, and the same procedure is followed. Manufactured.
  • the negative electrode active material layer 34B may already exist from the time of assembly, but does not exist at the time of assembly, and may be formed of lithium metal deposited at the time of charging. Further, the negative electrode current collector 34A may be omitted by using the negative electrode active material layer 34B as a current collector.
  • This secondary battery operates as follows, for example. At the time of charging, lithium ions are released from the positive electrode 33 and the lithium ions are deposited as lithium metal on the surface of the negative electrode current collector 34A through the electrolyte layer 36. On the other hand, at the time of discharge, lithium metal is converted into lithium ions from the negative electrode active material layer 34 ⁇ / b> B and eluted into the electrolyte layer 36, and the lithium ions are occluded in the positive electrode 21 through the electrolyte layer 36.
  • the wound electrode body 30 is housed inside the film-shaped exterior member 40, and the window portion 42 (window film 43) containing the window functional material is the exterior member. 40 (exterior body 41). Therefore, excellent battery characteristics can be obtained for the same reason as the above-described lithium ion secondary battery.
  • Other operations and effects relating to the lithium metal secondary battery are the same as those relating to the lithium ion secondary battery.
  • the window film 43 may be bonded to the exterior body 41 using, for example, any one type or two or more types of methods that do not use the adhesive 44.
  • methods that do not use the adhesive 44 include a heat fusion method and an ultrasonic welding method. Even in this case, since the window film 43 is fixed to the exterior body 41, the same effect can be obtained.
  • a window portion 42 may be provided on the side surface 41PS instead of the upper surface 41PT of the recessed portion 41P.
  • the opening shape and opening area of the opening 41K can be arbitrarily set, and the planar shape and area of the window film 43 can be arbitrarily set.
  • each of the opening shape of the opening 41K and the planar shape of the window film 43 is substantially rectangular (a rectangle with four corners rounded), and the area of the window film 43 is the opening of the opening 41K. It is larger than the area. Even in this case, the same effect can be obtained by the window portion 24 exhibiting a waterproof function and an exhaust function.
  • a window film 43 is arranged on the outside (external environment E2) of the exterior body 41 instead of the inside (internal environment E1) of the exterior body 41. May be.
  • the window film 43 is bonded to the outer surface of the exterior body 41 via an adhesive 44, for example. Even in this case, the same effect can be obtained by the window portion 24 exhibiting a waterproof function and an exhaust function.
  • the window film 43 when the window film 43 is disposed outside the exterior body 41, the window film 43 may be peeled off due to generation of gas (increase in internal pressure), and the window film. 43 may fall out of the secondary battery. Therefore, in order to suppress the window film 43 from peeling and dropping, the window film 43 is preferably disposed inside the exterior body 41 (internal environment E1).
  • a protective layer 46 may be provided on the window film 43.
  • This “on the window film 43” means the outside of the window film 43.
  • the protective layer 46 mainly functions to physically protect the surface of the window film 43.
  • the protective layer 46 includes, for example, any one kind or two or more kinds of materials having air permeability.
  • the type of material having air permeability is not particularly limited, and examples thereof include porous resins, ceramics, and mesh filters.
  • the kind of the porous resin is not particularly limited. For example, porous polytetrafluoroethylene (PTFE), nylon, polypropylene (PP), polyethylene (PE), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC) ) And zeolite.
  • the thickness of the protective layer 46 is not particularly limited and can be arbitrarily set.
  • the size (area) of the protective layer 46 is not particularly limited. That is, the area of the protective layer 46 may be the same as the exposed area of the window film 43 (the area of the window film 43 exposed at the opening 41K) or may be larger than the exposed area of the window film 43.
  • the protective layer 46 has an area larger than the exposed area of the window film 43, for example, and is bonded to the exterior body 41 via the adhesive 45.
  • the adhesive 45 is preferably provided so as not to block the opening 41K in order to ensure air permeability using the window film 43.
  • FIG. 7 for example, a case where the protective layer 46 is prevented from being bonded to the window film 43 via the adhesive 45 is shown.
  • the details regarding the adhesive 45 are the same as the details regarding the adhesive 44, for example.
  • the window film 43 is physically protected by the protective layer 46, the window film 43 is prevented from being deformed, damaged and peeled off due to an external force. Moreover, since the air-permeable material has the property of allowing gas to pass therethrough, even if the protective layer 46 is provided on the window film 43, the gas is released to the outside through the protective layer 46. Is done. Therefore, since the physical durability of the window film 43 is improved while the exhaust function of the window portion 42 is ensured, a higher effect can be obtained.
  • a protective layer 46 is provided on the window film 43. May be.
  • the protective layer 46 is bonded to the exterior body 41 or the like via an adhesive 45, for example. In this case, the same effect can be obtained.
  • Lithium ion secondary battery The secondary battery described here is a lithium ion secondary battery.
  • This secondary battery is the secondary battery according to the first embodiment, except that the exterior body 41 is not provided with the opening 41K and the exterior member 40 has a window 47 instead of the window 42. It has the same configuration as the battery and is manufactured by the same procedure.
  • FIG. 8 illustrates a perspective configuration (a state after bonding) of the secondary battery of the present embodiment, and corresponds to each of FIGS. 1 and 2. However, in FIG. 8, as in FIG. 2, the positive electrode lead 31 and the negative electrode lead 32 are not shown.
  • FIG. 9 shows a cross-sectional configuration of the exterior member 40 along the line CC shown in FIG.
  • FIG. 10 shows a cross-sectional configuration of the exterior member 40 along the line DD shown in FIG.
  • the window portion 47 mainly performs the same functions (waterproof function and exhaust function) as the window portion 42.
  • the window portion 47 is provided in the adhesion region 41 ⁇ / b> Y instead of the non-adhesion region 41 ⁇ / b> X of the exterior body 41, and includes the window film 48 instead of the window film 43. Yes.
  • the window part 47 includes, for example, a window functional material (non-porous molten fluororesin) and a window film 48 interposed between the exterior parts 41A and 41B.
  • a window functional material non-porous molten fluororesin
  • the window 47 is shaded.
  • the window 47 is exposed to each of the internal environment E1 and the external environment E2, as shown in FIGS.
  • the reason why the window portion 47 is provided in the exterior member 40 is the same as the case where the window portion 42 is provided in the exterior member 40. That is, by using the waterproof function and exhaust function of the window 47, deterioration of cycle characteristics and the like are suppressed without using machinery, equipment and devices such as safety valves, and secondary battery swelling is also suppressed. Is done.
  • the number, position, and configuration of the window portion 47 are not particularly limited.
  • the number of window portions 47 may be only one, or two or more.
  • the number of window parts 47 is one, for example.
  • the position of the window 47 may be arbitrary as long as it is any position in the adhesion region 41Y.
  • the window part 47 is provided in a part of the adhesion region 41Y on the side where each of the positive electrode lead 31 and the negative electrode lead 32 is introduced from the inside of the exterior member 40 to the outside, for example.
  • the window film 48 includes, for example, any one type or two or more types of window functional materials in the same manner as the window film 43. Since the planar shape of the window film 48 is not particularly limited, it may be, for example, a circle, an ellipse, a rectangle, or other shapes. Here, the planar shape of the window film 48 is, for example, a rectangle.
  • the window film 48 is adhered to the exterior main body 41 (exterior portion 41A) via an adhesive 49, and is similarly adhered to the exterior main body 41 (exterior portion 41B) via the adhesive 49.
  • the details regarding the adhesive 49 are the same as the details regarding the adhesive 44, for example.
  • the adhesive layer of the exterior part 41A and the adhesive layer of the outer layer part 41B are adhered to each other. Thereby, the exterior member 40 is sealed.
  • the thickness of the window film 48 is not particularly limited, but is, for example, 10 ⁇ m to 500 ⁇ m, preferably 10 ⁇ m to 200 ⁇ m. This is because, as in the case where the thickness of the window film 43 is defined, a sufficient waterproof function and a sufficient exhaust function can be obtained while ensuring the physical durability of the window film 48 and the like.
  • any one kind or two or more kinds of pretreatments may be applied to the surface of the window film 48. Details regarding the preprocessing are as described above, for example.
  • any one type or two or more types of pretreatments may be applied to the surface of the exterior body 41.
  • This secondary battery for example, except that the exterior member 40 provided with the window portion 48 is used by attaching the window film 48 to the exterior body 41 (the exterior portions 41A and 41B) using the adhesive 49. It is manufactured by the same procedure as the secondary battery of the first embodiment.
  • the wound electrode body 30 is housed inside the film-shaped exterior member 40, and the window portion 47 (window film 48) containing the window functional material is the exterior member. 40.
  • the waterproof function of the window film 48 is used to suppress deterioration of cycle characteristics and the like caused by water, and the window film 48 By using the exhaust function, swelling of the secondary battery is suppressed. Therefore, excellent battery characteristics can be obtained.
  • the window part 48 is formed by bonding the exterior parts 41A and 41B to each other via the window film 48 containing a window functional material, the window part 48 can be provided without providing the exterior body 41 with an opening or the like. Therefore, a higher effect can be obtained.
  • the thickness of the window film 48 is 10 ⁇ m to 500 ⁇ m, a sufficient waterproof function and a sufficient exhaust function can be obtained while ensuring the physical durability of the window film 48, so that a higher effect can be obtained. Can do.
  • Lithium metal secondary battery is a laminated film type lithium metal secondary battery.
  • This secondary battery has the same configuration as the above laminated film type lithium ion secondary battery except that lithium metal is used as the negative electrode active material, and is manufactured by the same procedure.
  • the wound electrode body 30 is housed inside the film-like exterior member 40, and the window portion 47 (window film 48) containing the window functional material is the exterior member. 40. Therefore, excellent battery characteristics can be obtained for the same reason as the above-described lithium ion secondary battery.
  • Other operations and effects relating to the lithium metal secondary battery are the same as those relating to the lithium ion secondary battery.
  • the window film 48 may be attached to the exterior body 41 using any one type or two or more types of methods that do not use the adhesive 49, for example, as with the window film 43. Good.
  • the details regarding the method not using the adhesive 49 are as described above, for example. Also in this case, since the window film 48 is fixed to the exterior body 41, the same effect can be obtained.
  • Secondary batteries can be used in machines, equipment, instruments, devices and systems (aggregates of multiple equipment) that can be used as a power source for driving or a power storage source for power storage. If there is, it will not be specifically limited.
  • the secondary battery used as a power source may be a main power source or an auxiliary power source.
  • the main power source is a power source that is preferentially used regardless of the presence or absence of other power sources.
  • the auxiliary power supply may be, for example, a power supply used instead of the main power supply, or a power supply that can be switched from the main power supply as necessary.
  • the type of main power source is not limited to the secondary battery.
  • the usage of the secondary battery is, for example, as follows.
  • Electronic devices including portable electronic devices
  • portable electronic devices such as video cameras, digital still cameras, mobile phones, notebook computers, cordless phones, headphone stereos, portable radios, portable televisions, and portable information terminals.
  • It is a portable living device such as an electric shaver.
  • Storage devices such as backup power supplies and memory cards.
  • Electric tools such as electric drills and electric saws.
  • It is a battery pack that is mounted on a notebook computer as a detachable power source.
  • Medical electronic devices such as pacemakers and hearing aids.
  • An electric vehicle such as an electric vehicle (including a hybrid vehicle).
  • It is an electric power storage system such as a home battery system that stores electric power in case of an emergency.
  • the secondary battery may be used for other purposes.
  • the battery pack is a power source using a secondary battery. As will be described later, this battery pack may use a single battery or an assembled battery.
  • An electric vehicle is a vehicle that operates (runs) using a secondary battery as a driving power source, and may be an automobile (such as a hybrid automobile) that includes a drive source other than the secondary battery as described above.
  • the power storage system is a system that uses a secondary battery as a power storage source.
  • a secondary battery which is a power storage source
  • An electric power tool is a tool in which a movable part (for example, a drill etc.) moves, using a secondary battery as a driving power source.
  • An electronic device is a device that exhibits various functions using a secondary battery as a driving power source (power supply source).
  • FIG. 11 shows a perspective configuration of a battery pack using single cells.
  • FIG. 12 shows a block configuration of the battery pack shown in FIG. FIG. 11 shows a state where the battery pack is disassembled.
  • the battery pack described here is a simple battery pack (so-called soft pack) using one secondary battery of the present technology, and is mounted on, for example, an electronic device typified by a smartphone.
  • the battery pack includes a power supply 111 that is a laminate film type secondary battery, and a circuit board 116 connected to the power supply 111.
  • a positive electrode lead 112 and a negative electrode lead 113 are attached to the power source 111.
  • a pair of adhesive tapes 118 and 119 are attached to both side surfaces of the power source 111.
  • a protection circuit (PCM: Protection Circuit Circuit Module) is formed on the circuit board 116.
  • the circuit board 116 is connected to the positive electrode 112 through the tab 114 and is connected to the negative electrode lead 113 through the tab 115.
  • the circuit board 116 is connected to a lead wire 117 with a connector for external connection. In the state where the circuit board 116 is connected to the power source 111, the circuit board 116 is protected by the label 120 and the insulating sheet 121. By attaching the label 120, the circuit board 116, the insulating sheet 121, and the like are fixed.
  • the battery pack includes, for example, a power supply 111 and a circuit board 116 as shown in FIG.
  • the circuit board 116 includes, for example, a control unit 121, a switch unit 122, a PTC element 123, and a temperature detection unit 124. Since the power source 111 can be connected to the outside via the positive electrode terminal 125 and the negative electrode terminal 127, the power source 111 is charged / discharged via the positive electrode terminal 125 and the negative electrode terminal 127.
  • the temperature detector 124 detects the temperature using a temperature detection terminal (so-called T terminal) 126.
  • the controller 121 controls the operation of the entire battery pack (including the usage state of the power supply 111).
  • the control unit 121 includes, for example, a central processing unit (CPU) and a memory.
  • the control unit 121 disconnects the switch unit 122 so that the charging current does not flow in the current path of the power supply 111. For example, when a large current flows during charging, the control unit 121 cuts off the charging current by cutting the switch unit 122.
  • the control unit 121 disconnects the switch unit 122 so that no discharge current flows in the current path of the power supply 111.
  • the control unit 121 cuts off the discharge current by cutting the switch unit 122.
  • the overcharge detection voltage is, for example, 4.2V ⁇ 0.05V, and the overdischarge detection voltage is, for example, 2.4V ⁇ 0.1V.
  • the switch unit 122 switches the usage state of the power source 111, that is, whether or not the power source 111 is connected to an external device, in accordance with an instruction from the control unit 121.
  • the switch unit 122 includes, for example, a charge control switch and a discharge control switch.
  • Each of the charge control switch and the discharge control switch is, for example, a semiconductor switch such as a field effect transistor (MOSFET) using a metal oxide semiconductor.
  • MOSFET field effect transistor
  • the temperature detection unit 124 measures the temperature of the power supply 111 and outputs the temperature measurement result to the control unit 121.
  • the temperature detection unit 124 includes a temperature detection element such as a thermistor, for example.
  • the temperature measurement result measured by the temperature detection unit 124 is used when the control unit 121 performs charge / discharge control during abnormal heat generation, or when the control unit 121 performs correction processing when calculating the remaining capacity. .
  • circuit board 116 may not include the PTC element 123. In this case, a PTC element may be attached to the circuit board 116 separately.
  • FIG. 13 shows a block configuration of a battery pack using an assembled battery.
  • This battery pack includes, for example, a control unit 61, a power source 62, a switch unit 63, a current measurement unit 64, a temperature detection unit 65, a voltage detection unit 66, and a switch control unit 67 inside the housing 60.
  • the housing 60 includes, for example, a plastic material.
  • the control unit 61 controls the operation of the entire battery pack (including the usage state of the power supply 62).
  • the control unit 61 includes, for example, a CPU.
  • the power source 62 is an assembled battery including two or more types of secondary batteries of the present technology, and the connection type of the two or more types of secondary batteries may be in series, in parallel, or a mixture of both. .
  • the power source 62 includes six secondary batteries connected in two parallel three series.
  • the switch unit 63 switches the usage state of the power source 62, that is, whether or not the power source 62 is connected to an external device, in accordance with an instruction from the control unit 61.
  • the switch unit 63 includes, for example, a charge control switch, a discharge control switch, a charging diode, a discharging diode, and the like.
  • Each of the charge control switch and the discharge control switch is, for example, a semiconductor switch such as a field effect transistor (MOSFET) using a metal oxide semiconductor.
  • MOSFET field effect transistor
  • the current measurement unit 64 measures the current using the current detection resistor 70 and outputs the measurement result of the current to the control unit 61.
  • the temperature detection unit 65 measures the temperature using the temperature detection element 69 and outputs the temperature measurement result to the control unit 61. This temperature measurement result is used, for example, when the control unit 61 performs charge / discharge control during abnormal heat generation, or when the control unit 61 performs correction processing when calculating the remaining capacity.
  • the voltage detection unit 66 measures the voltage of the secondary battery in the power source 62 and supplies the control unit 61 with the measurement result of the analog-digital converted voltage.
  • the switch control unit 67 controls the operation of the switch unit 63 according to signals input from the current measurement unit 64 and the voltage detection unit 66, respectively.
  • the switch control unit 67 disconnects the switch unit 63 (charge control switch) so that the charging current does not flow in the current path of the power source 62.
  • the power source 62 can only discharge through the discharging diode.
  • the switch control unit 67 cuts off the charging current.
  • the switch control unit 67 disconnects the switch unit 63 (discharge control switch) so that the discharge current does not flow in the current path of the power source 62.
  • the power source 62 can only be charged via the charging diode.
  • the switch control unit 67 interrupts the discharge current.
  • the overcharge detection voltage is, for example, 4.2V ⁇ 0.05V, and the overdischarge detection voltage is, for example, 2.4V ⁇ 0.1V.
  • the memory 68 includes, for example, an EEPROM which is a nonvolatile memory.
  • the memory 68 stores, for example, numerical values calculated by the control unit 61, information on the secondary battery measured in the manufacturing process stage (for example, internal resistance in an initial state), and the like. If the full charge capacity of the secondary battery is stored in the memory 68, the control unit 61 can grasp information such as the remaining capacity.
  • the temperature detection element 69 measures the temperature of the power supply 62 and outputs the temperature measurement result to the control unit 61.
  • the temperature detection element 69 includes, for example, a thermistor.
  • Each of the positive electrode terminal 71 and the negative electrode terminal 72 is used for an external device (eg, a notebook personal computer) that is operated using a battery pack, an external device (eg, a charger) that is used to charge the battery pack, and the like. It is a terminal to be connected.
  • the power source 62 is charged and discharged via the positive terminal 71 and the negative terminal 72.
  • FIG. 14 shows a block configuration of a hybrid vehicle which is an example of an electric vehicle.
  • This electric vehicle includes, for example, a control unit 74, an engine 75, a power source 76, a driving motor 77, a differential device 78, a generator 79, and a transmission 80 inside a metal casing 73. And a clutch 81, inverters 82 and 83, and various sensors 84.
  • the electric vehicle includes, for example, a front wheel drive shaft 85 and a front wheel 86 connected to the differential device 78 and the transmission 80, and a rear wheel drive shaft 87 and a rear wheel 88.
  • This electric vehicle can travel using, for example, one of the engine 75 and the motor 77 as a drive source.
  • the engine 75 is a main power source, such as a gasoline engine.
  • the driving force (rotational force) of the engine 75 is transmitted to the front wheels 86 and the rear wheels 88 via the differential device 78, the transmission 80, and the clutch 81 which are driving units.
  • the motor 77 serving as the conversion unit is used as a power source
  • the power (DC power) supplied from the power source 76 is converted into AC power via the inverter 82, and therefore the motor is utilized using the AC power.
  • 77 is driven.
  • the driving force (rotational force) converted from the electric power by the motor 77 is transmitted to the front wheels 86 and the rear wheels 88 via, for example, a differential device 78 that is a driving unit, a transmission 80, and a clutch 81.
  • the motor 77 may generate AC power using the rotational force. Good. Since this AC power is converted into DC power via the inverter 82, the DC regenerative power is preferably stored in the power source 76.
  • the control unit 74 controls the operation of the entire electric vehicle.
  • the control unit 74 includes, for example, a CPU.
  • the power source 76 includes one or more types of secondary batteries of the present technology.
  • the power source 76 may be connected to an external power source, and may store power by receiving power supply from the external power source.
  • the various sensors 84 are used, for example, to control the rotational speed of the engine 75 and to control the throttle valve opening (throttle opening).
  • the various sensors 84 include, for example, any one or more of speed sensors, acceleration sensors, engine speed sensors, and the like.
  • the electric vehicle may be a vehicle (electric vehicle) that operates using only the power source 76 and the motor 77 without using the engine 75.
  • FIG. 15 shows a block configuration of the power storage system.
  • This power storage system includes, for example, a control unit 90, a power source 91, a smart meter 92, and a power hub 93 in a house 89 such as a general house or a commercial building.
  • the power source 91 is connected to an electric device 94 installed in the house 89 and can be connected to an electric vehicle 96 stopped outside the house 89.
  • the power source 91 is connected to, for example, a private generator 95 installed in a house 89 via a power hub 93 and also connected to an external centralized power system 97 via a smart meter 92 and the power hub 93. It is possible.
  • the electric device 94 includes, for example, one or more kinds of home appliances, and the home appliances are, for example, a refrigerator, an air conditioner, a television, and a water heater.
  • the private power generator 95 includes, for example, any one type or two or more types among a solar power generator and a wind power generator.
  • the electric vehicle 96 includes, for example, any one or more of an electric vehicle, an electric motorcycle, and a hybrid vehicle.
  • the centralized power system 97 includes, for example, any one or more of a thermal power plant, a nuclear power plant, a hydroelectric power plant, and a wind power plant.
  • the control unit 90 controls the operation of the entire power storage system (including the usage state of the power supply 91).
  • the control unit 90 includes, for example, a CPU.
  • the power source 91 includes one or more types of secondary batteries of the present technology.
  • the smart meter 92 is, for example, a network-compatible power meter installed in the house 89 on the power demand side, and can communicate with the power supply side. Accordingly, the smart meter 92 enables highly efficient and stable energy supply, for example, by controlling the balance between the demand and supply of power in the house 89 while communicating with the outside.
  • the power storage system for example, power is accumulated in the power source 91 from the centralized power system 97 that is an external power source via the smart meter 92 and the power hub 93, and from the private power generator 95 that is an independent power source via the power hub 93.
  • electric power is accumulated in the power source 91.
  • the electric power stored in the power supply 91 is supplied to the electric device 94 and the electric vehicle 96 in accordance with an instruction from the control unit 90, so that the electric device 94 can be operated and the electric vehicle 96 can be charged.
  • the power storage system is a system that makes it possible to store and supply power in the house 89 using the power source 91.
  • the power stored in the power source 91 can be used as necessary. For this reason, for example, power is stored in the power source 91 from the centralized power system 97 at midnight when the electricity usage fee is low, and the power stored in the power source 91 is used during the day when the electricity usage fee is high. it can.
  • the power storage system described above may be installed for each house (one household), or may be installed for each of a plurality of houses (multiple households).
  • FIG. 16 shows a block configuration of the electric power tool.
  • the electric tool described here is, for example, an electric drill.
  • This electric tool includes, for example, a control unit 99 and a power source 100 inside a tool body 98.
  • a drill portion 101 which is a movable portion is attached to the tool body 98 so as to be operable (rotatable).
  • the tool main body 98 includes, for example, a plastic material.
  • the control unit 99 controls the operation of the entire power tool (including the usage state of the power supply 100).
  • the control unit 99 includes, for example, a CPU.
  • the power supply 100 includes one or more types of secondary batteries of the present technology.
  • the control unit 99 supplies power from the power supply 100 to the drill unit 101 in accordance with the operation of the operation switch.
  • the positive electrode 33 When producing the positive electrode 33, first, 97 parts by mass of a positive electrode active material (LiNi 0.5 Co 0.2 Mn 0.3 O 2 ), 2 parts by mass of a positive electrode binder (polyvinylidene fluoride), and a positive electrode conductive agent (carbon black) ) 1 part by mass was mixed to obtain a positive electrode mixture. Subsequently, the positive electrode mixture was charged into an organic solvent (N-methyl-2-pyrrolidone), and then the organic solvent was stirred to obtain a paste-like positive electrode mixture slurry.
  • a positive electrode active material LiNi 0.5 Co 0.2 Mn 0.3 O 2
  • a positive electrode binder polyvinylidene fluoride
  • a positive electrode conductive agent carbon black
  • the positive electrode mixture slurry was applied to both surfaces of the positive electrode current collector 33A (12 ⁇ m-thick striped aluminum foil) using a coating apparatus, and then the positive electrode mixture slurry was dried, whereby the positive electrode active material layer 33B was formed. Formed. Finally, the positive electrode active material layer 33B was compression molded using a roll press.
  • a negative electrode binder acrylic modified product of styrene-butadiene rubber copolymer
  • a thickener carboxymethylcellulose
  • the negative electrode mixture slurry was applied to both surfaces of the negative electrode current collector 34A (15 ⁇ m thick strip copper foil) using a coating apparatus, and then the negative electrode mixture slurry was dried, whereby the negative electrode active material layer 34B was formed. Formed. Finally, the negative electrode active material layer 34B was compression molded using a roll press.
  • an electrolyte salt LiPF 6
  • a solvent ethylene carbonate, ethyl methyl carbonate and vinylene carbonate
  • the positive electrode lead 31 made of aluminum was welded to the positive electrode current collector 33A, and the negative electrode lead 32 made of copper was welded to the negative electrode current collector 34A.
  • a polymer compound (polyvinylidene fluoride) is dissolved in an organic solvent (N-methyl-2-pyrrolidone) to obtain a solution in which the polymer compound is dissolved in the organic solvent.
  • the solution was applied on both sides of a (12 ⁇ m thick microporous polyethylene film).
  • the substrate layer was immersed in a water bath to phase-separate the solution, and then the substrate layer was dried with warm air. Thereby, since the high molecular compound layer was formed on both surfaces of the base material layer, the separator 35 was obtained.
  • the positive electrode 33 and the negative electrode 34 were laminated through the separator 35 to obtain a laminate. Then, after winding a laminated body to a longitudinal direction, the wound electrode body 30 was produced by affixing the protective tape 37 on the outermost peripheral part of the laminated body.
  • the exterior member 40 is an aluminum laminated film in which a 25 ⁇ m thick nylon film, a 40 ⁇ m thick aluminum foil, and a 30 ⁇ m thick polypropylene film are laminated in this order from the outside.
  • a window film 43 containing a window functional material is attached to the exterior body 41 via the adhesive 44 so as to cover the opening 41K provided in the non-adhesion region 41X of the exterior body 41.
  • the exterior member 40 provided with the window portion 42 was used.
  • the exterior member 40 provided with the protective layer 46 by sticking the protective layer 46 to the window film 43 via the adhesive 46 was used.
  • an exterior member 40 not provided with a window portion 42 was used.
  • the exterior member 40 in which the window film 43 contains materials other than a window functional material was used for the comparison.
  • the material of the window film 43 is as follows. Non-porous PFA, non-porous FEP and non-porous ETFE were used as the window functional material (non-porous molten fluororesin). As materials other than the window functional material, porous PFA, polypropylene (PP) and polyethylene terephthalate (PET) were used.
  • porous polytetrafluoroethylene PTFE
  • the surface of the window film 43 was pretreated.
  • the surface of the window film 43 is reformed (so-called fluorobonder treatment) by spraying the surface of the window film 43 with a pretreatment agent (a fluororesin surface treatment agent fluorobonder E manufactured by Technos Co., Ltd.). did.
  • a pretreatment agent a fluororesin surface treatment agent fluorobonder E manufactured by Technos Co., Ltd.
  • the surface of the exterior body 41 was pretreated.
  • an undercoat PPX primer manufactured by Cemedine Co., Ltd.
  • the pretreatment surface of the window film 43 and the pretreatment surface of the exterior main body 41 were bonded via an adhesive 44 (PPX manufactured by Cemedine Co., Ltd.).
  • the window film 43 containing a material other than the window functional material is attached to the exterior main body 41 via the adhesive 44
  • the window film 43 containing the window functional material is attached to the exterior main body 41 via the adhesive 44.
  • a similar procedure was used.
  • the scratching state on the outermost surface of the window portion 42 was visually confirmed by performing a scratch test in accordance with JIS K5400-5-4.
  • “A” indicates that no scratch is generated on the outermost surface of the window portion 42
  • “B” indicates that the scratch is generated on the outermost surface of the window portion 42
  • the case where the window portion 42 was damaged was evaluated as “C”.
  • the outermost surface of the window portion 42 is the surface of the window film 43 when the protective layer 46 is not provided, and the surface of the protective layer 46 when the protective layer 46 is provided.
  • the adhesion strength of the window film 43 was confirmed by performing an adhesion test based on JIS K7127: 1999. As a result, the case where the window film 43 did not peel was evaluated as “A”, and the case where the window film 43 peeled was evaluated as “C”.
  • each of the capacity maintenance rate and the thickness change rate varied greatly depending on the material of the window film 43.
  • window functional materials non-porous PFA, non-porous FEP, and non-porous ETFE
  • the rate of change in thickness was significantly reduced while the capacity maintenance rate was substantially maintained.
  • the window portion 42 windshield film 43 including a window functional material
  • the gas generated inside the secondary battery is released to the outside. This indicates that it is difficult for water to enter the inside of the battery, so that the discharge capacity is hardly reduced.
  • Example 2-1 to 2-4 As shown in Table 2, Experimental Examples 1-1 to 1-15 except that a window portion 47 (window film 48) is provided in the adhesion region 41Y instead of the non-adhesion region 41X of the exterior body 41.
  • the laminate film type lithium ion secondary battery shown in FIG. 8 to FIG. 10 was produced by the same procedure as described above, and the battery characteristics of the secondary battery were evaluated.
  • both surfaces of the window film 48 were modified (fluorobonder treatment) by spraying a pretreatment agent (a fluororesin surface treatment agent fluorobonder E manufactured by Technos Co., Ltd.) on both surfaces of the window film 48. . Subsequently, each of the surface of the exterior part 41A and the surface of the exterior part 41B was pretreated.
  • a pretreatment agent a fluororesin surface treatment agent fluorobonder E manufactured by Technos Co., Ltd.
  • an undercoat (PPX primer manufactured by Cemedine Co., Ltd.) was applied to the surface of the exterior portion 41A, and a similar undercoat was applied to the surface of the exterior portion 41B.
  • the pretreatment surface of the window film 48 and the pretreatment surface of the exterior portion 41A are bonded to each other via an adhesive 49 (PPX manufactured by Cemedine Co., Ltd.), and the window film is attached via the same adhesive 49.
  • the 48 pretreatment surfaces and the pretreatment surface of the exterior portion 41B were adhered to each other.
  • the window 47 is provided in the bonded area 41Y (Table 2)
  • the same result as in the case where the window 42 is provided in the non-bonded area 41X (Table 1) was obtained. That is, when the window 47 is provided and a window functional material is used as a material for forming the window film 48 (Experimental Examples 2-1 to 2-41), the window 47 is not provided (Experimental Example 1). ⁇ 12) and a case where a material other than the window functional material is used as a material for forming the window film 48 (Experimental Examples 1-13 to 1-15), a high capacity retention rate is obtained, and a thickness change rate is obtained. Decreased significantly.
  • the wound electrode body is accommodated in the film-shaped exterior member, and the window portion containing the window functional material (non-porous molten fluororesin) is included in the exterior member.
  • the capacity maintenance characteristic and the swollenness characteristic of the secondary battery were improved while ensuring the physical durability characteristic and adhesion characteristic of the exterior member. Therefore, excellent battery characteristics were obtained in the secondary battery.
  • the structure of the battery element in the secondary battery of the present technology is not particularly limited.
  • the battery element may have another structure such as a laminated structure.
  • the secondary battery lithium ion secondary battery in which the capacity of the negative electrode can be obtained by occlusion and release of lithium
  • the secondary battery (lithium metal secondary battery) in which the capacity of the negative electrode can be obtained by precipitation dissolution of lithium have been described.
  • the principle of obtaining the capacity of the negative electrode in the secondary battery of the present technology is not particularly limited. Specifically, for example, by making the capacity of the negative electrode material capable of occluding and releasing lithium smaller than the capacity of the positive electrode, the secondary battery can be obtained by the sum of the capacity due to the occlusion and release of lithium and the capacity due to the precipitation dissolution of lithium.
  • a secondary battery or the like that can obtain the capacity of the negative electrode may be used.
  • the electrode reactant may be another group 1 element in the long-period periodic table such as sodium (Na) and potassium (K), or may be a long-period periodic table such as magnesium (Mg) and calcium (Ca). Group 2 elements may be used, or other light metals such as aluminum (Al) may be used.
  • the electrode reactant may be an alloy containing any one or more of the series of elements described above.
  • this technique can also take the following structures.
  • a battery element comprising a positive electrode, a negative electrode and an electrolyte;
  • a secondary battery comprising the battery element and a film-shaped exterior member having a window portion containing a non-porous molten fluororesin.
  • the non-porous molten fluororesin includes non-porous tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA), non-porous tetrafluoroethylene / hexafluoropropylene copolymer (FEP), and non-porous tetrafluoro.
  • the secondary battery as described in said (1).
  • the exterior member has an opening, The window portion is formed by covering at least the opening with a film-like window member containing the non-porous molten fluororesin, The secondary battery according to (1) or (2) above.
  • the window member has an area larger than the area of the opening, and is attached to the exterior member via an adhesive.
  • a protective layer containing a material having air permeability is provided on the window member.
  • the window member has a thickness of 10 ⁇ m or more and 500 ⁇ m or less, The secondary battery according to any one of (3) to (5) above.
  • the exterior member is A first exterior member that covers the battery element from one side; A second exterior member that covers the battery element from the other side, The window portion is formed by bonding a part of the first exterior member and a part of the second exterior member to each other via a film-like window member containing the non-porous molten fluororesin. Being The secondary battery according to (1) or (2) above.
  • the window member is attached to each of the first exterior member and the second exterior member via an adhesive.
  • the secondary battery according to (7) above. (9)
  • the window member has a thickness of 10 ⁇ m or more and 500 ⁇ m or less, The secondary battery according to (7) or (8) above.
  • a lithium ion secondary battery The secondary battery according to any one of (1) to (9).
  • a power tool comprising: a movable part to which electric power is supplied from the secondary battery.
  • An electronic device comprising the secondary battery according to any one of (1) to (10) as a power supply source.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne une pile rechargeable comprenant : un élément de pile contenant une électrode positive, une électrode négative et un électrolyte; et un élément extérieur de type film qui stocke cet élément de pile, et qui a une partie fenêtre contenant une résine fluorée fondue non poreuse.
PCT/JP2017/037361 2016-12-16 2017-10-16 Pile rechargeable, bloc-piles, véhicule électrique, système de stockage d'électricité, outil électrique et dispositif électronique Ceased WO2018110067A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018556218A JP6801722B2 (ja) 2016-12-16 2017-10-16 二次電池、電池パック、電動車両、電力貯蔵システム、電動工具および電子機器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016244512 2016-12-16
JP2016-244512 2016-12-16

Publications (1)

Publication Number Publication Date
WO2018110067A1 true WO2018110067A1 (fr) 2018-06-21

Family

ID=62558762

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/037361 Ceased WO2018110067A1 (fr) 2016-12-16 2017-10-16 Pile rechargeable, bloc-piles, véhicule électrique, système de stockage d'électricité, outil électrique et dispositif électronique

Country Status (2)

Country Link
JP (1) JP6801722B2 (fr)
WO (1) WO2018110067A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114128023A (zh) * 2019-07-30 2022-03-01 株式会社村田制作所 二次电池、电池包、电子设备、电动工具、电动航空器及电动车辆
JP2022542565A (ja) * 2019-08-27 2022-10-05 エルジー エナジー ソリューション リミテッド 二次電池用電池ケース及びパウチ型二次電池の製造方法
JP2022543691A (ja) * 2019-08-27 2022-10-13 エルジー エナジー ソリューション リミテッド 二次電池用電池ケースおよびガス排出部の製造方法
JPWO2022244853A1 (fr) * 2021-05-19 2022-11-24
JP2023521312A (ja) * 2020-07-10 2023-05-24 エルジー エナジー ソリューション リミテッド ガス排出のためのガス排出部を含む二次電池及び二次電池の製造方法
CN116250131A (zh) * 2021-05-24 2023-06-09 株式会社Lg新能源 电池单元及包括该电池单元的电池模块
JP2023525014A (ja) * 2020-12-08 2023-06-14 エルジー エナジー ソリューション リミテッド 二次電池及びそれを含む電池モジュール
WO2024024863A1 (fr) * 2022-07-29 2024-02-01 日東電工株式会社 Feuille pour carter externe et dispositif de stockage d'énergie la comprenant
US20240097220A1 (en) * 2020-04-10 2024-03-21 Lg Energy Solution, Ltd. Battery cell for evaluating lithium precipitation behavior, and method for manufacturing same
JP2024038835A (ja) * 2022-09-08 2024-03-21 トヨタ自動車株式会社 蓄電装置
JPWO2024248106A1 (fr) * 2023-05-31 2024-12-05

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010034244A (ja) * 2008-07-29 2010-02-12 Nok Corp 圧力開放弁
JP2012190639A (ja) * 2011-03-10 2012-10-04 Sony Corp 非水電解質電池、電池パック及び電子機器
JP2013506966A (ja) * 2009-10-05 2013-02-28 リ−テック・バッテリー・ゲーエムベーハー 電気化学的セル
WO2013146803A1 (fr) * 2012-03-28 2013-10-03 株式会社オプトニクス精密 Soupape de sécurité et élément électrochimique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010034244A (ja) * 2008-07-29 2010-02-12 Nok Corp 圧力開放弁
JP2013506966A (ja) * 2009-10-05 2013-02-28 リ−テック・バッテリー・ゲーエムベーハー 電気化学的セル
JP2012190639A (ja) * 2011-03-10 2012-10-04 Sony Corp 非水電解質電池、電池パック及び電子機器
WO2013146803A1 (fr) * 2012-03-28 2013-10-03 株式会社オプトニクス精密 Soupape de sécurité et élément électrochimique

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114128023B (zh) * 2019-07-30 2024-03-29 株式会社村田制作所 二次电池、电池包、电子设备、电动工具、电动航空器及电动车辆
CN114128023A (zh) * 2019-07-30 2022-03-01 株式会社村田制作所 二次电池、电池包、电子设备、电动工具、电动航空器及电动车辆
JP7325892B2 (ja) 2019-08-27 2023-08-15 エルジー エナジー ソリューション リミテッド 二次電池用電池ケース及びパウチ型二次電池の製造方法
JP2022542565A (ja) * 2019-08-27 2022-10-05 エルジー エナジー ソリューション リミテッド 二次電池用電池ケース及びパウチ型二次電池の製造方法
JP2022543691A (ja) * 2019-08-27 2022-10-13 エルジー エナジー ソリューション リミテッド 二次電池用電池ケースおよびガス排出部の製造方法
US12080912B2 (en) 2019-08-27 2024-09-03 Lg Energy Solution, Ltd. Battery case for secondary battery and method for manufacturing pouch type secondary battery
JP7466975B2 (ja) 2019-08-27 2024-04-15 エルジー エナジー ソリューション リミテッド 二次電池用電池ケースおよびガス排出部の製造方法
US12555870B2 (en) 2019-08-27 2026-02-17 Lg Energy Solution, Ltd. Battery case for secondary battery and method for manufacturing gas discharge part
US20240097220A1 (en) * 2020-04-10 2024-03-21 Lg Energy Solution, Ltd. Battery cell for evaluating lithium precipitation behavior, and method for manufacturing same
US12542309B2 (en) * 2020-04-10 2026-02-03 Lg Energy Solution, Ltd. Battery cell for evaluating lithium precipitation behavior, and method for manufacturing same
JP7750599B2 (ja) 2020-07-10 2025-10-07 エルジー エナジー ソリューション リミテッド ガス排出のためのガス排出部を含む二次電池及び二次電池の製造方法
JP2023521312A (ja) * 2020-07-10 2023-05-24 エルジー エナジー ソリューション リミテッド ガス排出のためのガス排出部を含む二次電池及び二次電池の製造方法
JP2023525014A (ja) * 2020-12-08 2023-06-14 エルジー エナジー ソリューション リミテッド 二次電池及びそれを含む電池モジュール
US11916240B2 (en) 2020-12-08 2024-02-27 Lg Energy Solution, Ltd. Secondary battery and battery module including the same
JP7525649B2 (ja) 2020-12-08 2024-07-30 エルジー エナジー ソリューション リミテッド 二次電池及びそれを含む電池モジュール
EP4343801A4 (fr) * 2021-05-19 2025-02-19 Dai Nippon Printing Co., Ltd. Film de dégazage imperméable à l'eau pour dispositif de stockage d'énergie
WO2022244853A1 (fr) * 2021-05-19 2022-11-24 大日本印刷株式会社 Film de dégazage imperméable à l'eau pour dispositif de stockage d'énergie
JPWO2022244853A1 (fr) * 2021-05-19 2022-11-24
CN116250131A (zh) * 2021-05-24 2023-06-09 株式会社Lg新能源 电池单元及包括该电池单元的电池模块
JP7581492B2 (ja) 2021-05-24 2024-11-12 エルジー エナジー ソリューション リミテッド 電池セル及びそれを含む電池モジュール
JP2023542849A (ja) * 2021-05-24 2023-10-12 エルジー エナジー ソリューション リミテッド 電池セル及びそれを含む電池モジュール
WO2024024863A1 (fr) * 2022-07-29 2024-02-01 日東電工株式会社 Feuille pour carter externe et dispositif de stockage d'énergie la comprenant
JP7652161B2 (ja) 2022-09-08 2025-03-27 トヨタ自動車株式会社 蓄電装置
JP2024038835A (ja) * 2022-09-08 2024-03-21 トヨタ自動車株式会社 蓄電装置
JPWO2024248106A1 (fr) * 2023-05-31 2024-12-05

Also Published As

Publication number Publication date
JP6801722B2 (ja) 2020-12-16
JPWO2018110067A1 (ja) 2019-06-24

Similar Documents

Publication Publication Date Title
JP6801722B2 (ja) 二次電池、電池パック、電動車両、電力貯蔵システム、電動工具および電子機器
WO2016009794A1 (fr) Matériau actif d'électrode négative pour batterie rechargeable, électrode négative pour batterie rechargeable, batterie rechargeable, bloc-batterie, véhicule électrique, système de stockage d'énergie électrique, outil électrique et équipement électronique
JP2018206514A (ja) 二次電池、電池パック、電動車両、電力貯蔵システム、電動工具および電子機器
US11695119B2 (en) Negative electrode for secondary battery, secondary battery, battery pack, electric vehicle, power storage system, power tool, and electronic device
JP6596815B2 (ja) 二次電池用活物質、二次電池用電極、二次電池、電動車両および電子機器
JPWO2017138309A1 (ja) 二次電池用正極活物質、二次電池用正極、二次電池、電池パック、電動車両、電力貯蔵システム、電動工具および電子機器
WO2016088471A1 (fr) Matériau actif de batterie secondaire, électrode de batterie secondaire, batterie secondaire, bloc de batteries, véhicule électrique, système de stockage d'énergie, outil électrique et appareil électronique
WO2017159073A1 (fr) Électrode négative pour des batteries secondaires, batterie secondaire, bloc-batterie, véhicule électrique, système de stockage d'énergie, outil électrique et appareil électronique
WO2016056361A1 (fr) Électrolyte pour batterie secondaire, batterie secondaire, bloc-batterie, véhicule électrique, système d'accumulation d'énergie, outil électrique et équipement d'appreil électronique
US11817572B2 (en) Secondary battery, battery pack, electrically driven vehicle, electric power storage system, electric tool, and electronic device
JP6597793B2 (ja) 二次電池、電池パック、電動車両、電力貯蔵システム、電動工具および電子機器
JP6257087B2 (ja) 二次電池、電池パック、電動車両、電力貯蔵システム、電動工具および電子機器
WO2015186517A1 (fr) Électrolyte d'accumulateur, accumulateur, bloc accumulateur, véhicule électrique, système de stockage d'énergie électrique, outil électrique, et dispositif électronique
JP2015156280A (ja) 二次電池用活物質、二次電池用電極、二次電池、電池パック、電動車両、電力貯蔵システム、電動工具および電子機器
JP6131868B2 (ja) リチウム二次電池用非水電解液、リチウム二次電池、電池パック、電動車両、電力貯蔵システム、電動工具および電子機器
WO2018142682A1 (fr) Électrode négative pour batterie secondaire, batterie secondaire, bloc-batterie, véhicule électrique, système de stockage d'énergie, outil électrique, et appareil électronique
JP6350109B2 (ja) 二次電池用電解液、二次電池、電池パック、電動車両、電力貯蔵システム、電動工具および電子機器
US11532821B2 (en) Negative electrode for lithium ion secondary battery, lithium ion secondary battery, battery pack, electric vehicle, power storage system, power tool, and electronic device
WO2017168983A1 (fr) Batterie secondaire, châssis de batterie, véhicule électrique, système de stockage d'énergie, outil électrique et dispositif électronique

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: 17880679

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2018556218

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: 17880679

Country of ref document: EP

Kind code of ref document: A1