WO2023111755A1 - 電池 - Google Patents

電池 Download PDF

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Publication number
WO2023111755A1
WO2023111755A1 PCT/IB2022/061680 IB2022061680W WO2023111755A1 WO 2023111755 A1 WO2023111755 A1 WO 2023111755A1 IB 2022061680 W IB2022061680 W IB 2022061680W WO 2023111755 A1 WO2023111755 A1 WO 2023111755A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
negative electrode
region
current collector
positive 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/IB2022/061680
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
高橋辰義
田島亮太
栗城和貴
三上真弓
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.)
Semiconductor Energy Laboratory Co Ltd
Original Assignee
Semiconductor Energy Laboratory 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 Semiconductor Energy Laboratory Co Ltd filed Critical Semiconductor Energy Laboratory Co Ltd
Priority to KR1020247020483A priority Critical patent/KR20240121246A/ko
Priority to CN202280080607.8A priority patent/CN118355557A/zh
Priority to JP2023567266A priority patent/JPWO2023111755A1/ja
Priority to US18/718,903 priority patent/US20240421445A1/en
Publication of WO2023111755A1 publication Critical patent/WO2023111755A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • One aspect of the present invention relates to a battery and a manufacturing method thereof.
  • One aspect of the present invention relates to an electrode manufacturing method and an electrode manufacturing apparatus.
  • one embodiment of the present invention relates to a personal digital assistant, a vehicle, or the like including a secondary battery.
  • one aspect of the present invention relates to a product, method, or manufacturing method.
  • the invention relates to a process, machine, manufacture, or composition of matter.
  • One embodiment of the present invention relates to semiconductor devices, display devices, light-emitting devices, power storage devices, lighting devices, electronic devices, or manufacturing methods thereof.
  • electro-optical device refers to all devices having a power storage device, and electro-optical devices having a power storage device, information terminal devices having a power storage device, and the like are all electronic devices.
  • the power storage device generally refers to elements and devices having a power storage function.
  • power storage devices include power storage devices (also referred to as batteries, secondary batteries, etc.) such as lithium ion secondary batteries, sodium ion batteries, and nickel-hydrogen batteries, lithium ion capacitors, electric double layer capacitors, and the like.
  • lithium-ion secondary batteries which have high output and high energy density
  • portable information terminals such as mobile phones, smartphones, or notebook computers, portable music players, digital cameras, medical equipment, hybrid vehicles (HV), electric
  • HV hybrid vehicles
  • EV next-generation clean energy vehicles
  • PSV plug-in hybrid vehicles
  • a structure in which an active material layer (active material coating portion) is provided on a current collector made of metal foil is sometimes used in an electrode of a power storage device.
  • the current collector is often connected to an electrode terminal (also referred to as an electrode lead) in a region where no active material layer is provided (referred to as a current collector exposed portion, an uncoated portion, or the like).
  • the thickness of the active material-coated portion is thicker than the thickness of the current collector-exposed portion. Therefore, as in the wound type battery structure disclosed in Patent Document 1, when the current collector exposed portion and the electrode terminal are connected, the current collector exposed portion is brought together so as to be in contact with the electrode terminal. Then, large distortion occurs in a part of the electrode. This distortion may cause a problem of capacity reduction due to peeling of the active material from the current collector, a problem of reaction unevenness due to uneven electrode spacing, and the like.
  • the connection with the electrode terminal is often made at the current collector exposed portion. .
  • a portion of the electrode is greatly distorted.
  • an object of one embodiment of the present invention is to provide a battery in which distortion of an electrode is suppressed in connection between an electrode terminal and a current collector-exposed portion. Another object is to provide a battery in which a decrease in capacity due to peeling of an active material from a current collector is suppressed. Alternatively, another object is to provide a battery in which reaction unevenness due to uneven electrode spacing is suppressed.
  • an object of one embodiment of the present invention is to provide a method for manufacturing a battery in which distortion of an electrode is suppressed in connection between an electrode terminal and a current collector-exposed portion. Another object is to provide a method for manufacturing a battery in which reduction in capacity due to separation of an active material from a current collector is suppressed. Alternatively, another object is to provide a method for manufacturing a battery in which reaction unevenness due to uneven electrode spacing is suppressed.
  • One aspect of the present invention includes an electrode, an exterior body enclosing the electrode, and a lead extending from the inside of the exterior body to the outside, and the electrode includes a current collector and an active material layer.
  • the electrode has a first region in which the active material layer is provided on the current collector and a second region in which the current collector is exposed; the second region of the electrode is the current collector has a third region in which the is folded and the lead is connected to the electrode in the third region.
  • the thickness of the third region is preferably 0.5 or more and 2.5 or less.
  • one aspect of the present invention is a battery comprising an exterior body enclosing a negative electrode, a positive electrode, and a separator, and a negative electrode lead and a positive electrode lead extending from the interior of the exterior body to the outside,
  • the negative electrode has a negative electrode current collector and a negative electrode active material layer
  • the positive electrode has a positive electrode current collector and a positive electrode active material layer
  • the separator has a negative electrode active material layer and a positive electrode active material layer.
  • the negative electrode has a first region where the negative electrode active material layer is provided on the negative electrode current collector and a second region where the negative electrode current collector is exposed, and the second region of the negative electrode The region has a third region in which the negative electrode current collector is folded, and the positive electrode has a fourth region in which a positive electrode active material layer is provided on the positive electrode current collector and a fifth region in which the positive electrode current collector is exposed.
  • a fifth region of the positive electrode has a sixth region in which the positive electrode current collector is folded, the thickness of the first region of the negative electrode, the thickness of the fourth region of the positive electrode, and
  • the thickness of the third region of the negative electrode is 0.5 or more and 1.2 or less
  • the thickness of the first region of the negative electrode and the fourth region of the positive electrode are
  • the thickness of the sixth region of the positive electrode is 0.5 or more and 1.2 or less
  • the negative electrode lead is the third region and the positive lead is connected to the positive electrode in the sixth region.
  • a method for manufacturing a battery in which distortion of an electrode is suppressed in connection between an electrode terminal and a current collector-exposed portion can be provided.
  • a method for manufacturing a battery in which reduction in capacity due to peeling of the active material from the current collector is suppressed is suppressed.
  • a method for manufacturing a battery in which reaction unevenness due to uneven electrode spacing is suppressed.
  • 1A to 1C are diagrams showing configuration examples of a battery.
  • 2A to 2C are schematic cross-sectional views showing configuration examples of electrodes.
  • 3A and 3B are schematic diagrams showing configuration examples of electrodes.
  • 4A to 4C are cross-sectional schematic diagrams showing configuration examples of a laminate.
  • 5A and 5B are cross-sectional schematic diagrams showing configuration examples of a laminate.
  • 6A and 6B are cross-sectional schematic diagrams showing configuration examples of a laminate.
  • 7A to 7C are diagrams showing configuration examples of a battery.
  • 8A and 8B are diagrams showing configuration examples of a battery.
  • FIG. 9 is a diagram showing a configuration example of a battery.
  • 10A and 10B are diagrams showing configuration examples of a battery.
  • FIG. 11A and 11B are diagrams showing configuration examples of a battery.
  • FIG. 12 is a diagram for explaining a film processing method.
  • 13A to 13E are diagrams for explaining a film processing method.
  • 14A and 14B are diagrams for explaining a film processing method.
  • 15A and 15B are diagrams illustrating an electronic device of one embodiment of the present invention.
  • 16A and 16B illustrate an electronic device of one embodiment of the present invention.
  • 17A to 17D illustrate an electronic device of one embodiment of the present invention.
  • 18A to 18D illustrate an electronic device of one embodiment of the present invention.
  • 19A to 19C are diagrams illustrating electronic devices of one embodiment of the present invention.
  • 20A to 20C are diagrams illustrating electronic devices of one embodiment of the present invention.
  • FIG. 12 is a diagram for explaining a film processing method.
  • 13A to 13E are diagrams for explaining a film processing method.
  • 14A and 14B are diagrams for explaining a film processing method.
  • 21A is a perspective view showing an example of a battery pack.
  • FIG. 21B is a block diagram showing an example of a battery pack.
  • FIG. 21C is a block diagram showing an example of a vehicle having a motor.
  • 22A to 22E are diagrams showing an example of a transportation vehicle.
  • 23A is a diagram showing an electric bicycle
  • FIG. 23B is a diagram showing a battery of the electric bicycle
  • FIG. 23C is a diagram explaining an electric motorcycle.
  • 24A and 24B are diagrams illustrating an example of a power storage device.
  • 25A to 25D are diagrams showing an example of space equipment.
  • the ordinal numbers such as first and second are used for convenience and do not indicate the order of steps or the order of stacking. Therefore, for example, “first” can be appropriately replaced with “second” or “third”. Also, the ordinal numbers described in this specification and the like may not match the ordinal numbers used to specify one aspect of the present invention.
  • particles are not limited to spherical shapes (having circular cross-sectional shapes). etc., and individual particles may be amorphous.
  • the particle size of the particles can be measured, for example, by laser diffraction particle size distribution measurement, and can be expressed as D50.
  • D50 is the particle size when the integrated amount occupies 50% of the integrated particle amount curve of the particle size distribution measurement result, that is, the median diameter.
  • the measurement of particle size is not limited to laser diffraction particle size distribution measurement, and when the measurement is below the lower limit of laser diffraction particle size distribution measurement, analysis such as SEM (scanning electron microscope) or TEM (transmission electron microscope) is used.
  • the cross-sectional diameter of the particles may be measured by As a method for measuring the particle size when the cross-sectional shape of the particle is not circular, for example, the cross-sectional area of the particle is measured by image processing or the like, and the particle size can be calculated as the diameter of a circle having this area.
  • the electrodes have an active material layer and a current collector.
  • An electrode in which an active material layer is provided on one side of a current collector is called a single-sided coated electrode, and an electrode in which an active material layer is provided on both sides of a current collector is called a double-sided coated electrode.
  • FIG. 1A and 1B are diagrams showing an example of a battery of one embodiment of the present invention.
  • FIG. 1C is a diagram illustrating an example of electrodes included in a battery of one embodiment of the present invention.
  • a battery 10 is shown in FIG. 1A.
  • the battery 10 has an exterior body 50 and a positive electrode lead 21 and a negative electrode lead 31 extending from the inside of the exterior body 50 to the outside.
  • the exterior body 50 is sealed with the sealing portion 24 , the sealing portion 34 , and the sealing portion 51 .
  • FIG. 1B is a schematic cross-sectional view along the dashed-dotted line X1-X2 in FIG. 1A.
  • the battery 10 has a positive electrode 20 , a negative electrode 30 , a separator 40 and an exterior body 50 .
  • the positive electrode 20 , the negative electrode 30 , and the separator 40 are enclosed in the outer package 50 .
  • the positive electrode 20 and the positive electrode lead 21 are electrically connected, and the positive electrode lead 21 extends from the inside of the exterior body 50 to the outside.
  • the negative electrode 30 and the negative electrode lead 31 are electrically connected, and the negative electrode lead 31 extends from the inside of the exterior body 50 to the outside.
  • the positive electrode 20 has a positive electrode current collector 22 and a positive electrode active material layer 23
  • the negative electrode 30 has a negative electrode current collector 32 and a negative electrode active material layer 33
  • the separator 40 has at least a region located between the positive electrode active material layer 23 and the negative electrode active material layer 33 .
  • the negative electrode 30 includes a first region 35 having a negative electrode current collector 32 and a negative electrode active material layer 33, a second region 36 where the negative electrode current collector 32 is exposed, and a negative electrode collector. and a third region 37 in which the electrical body 32 is folded.
  • a third region 37 is located inside the second region 36 .
  • the first region 35 can be called an active material coating portion
  • the second region 36 can be called a current collector exposed portion
  • the third region 37 can be called a current collector folded portion. can be done.
  • the region having the active material layer on at least one surface of the current collector is defined as the active material coated portion.
  • the positive electrode 20 includes a fourth region having a positive electrode current collector 22 and a positive electrode active material layer 23, a fifth region where the positive electrode current collector is exposed, and a fourth region where the positive electrode current collector is folded. 6 regions.
  • the sixth area is located inside the fifth area.
  • the fourth region can be called an active material-coated portion
  • the fifth region can be called a collector-exposed portion
  • the sixth region can be called a collector-folded portion.
  • the negative electrode lead 31 is connected to the negative electrode 30 at the third region 37 (collector folded portion).
  • the positive electrode lead 21 is connected to the positive electrode 20 at the sixth region (collector folded portion). In this way, the positive electrode 20 , the negative electrode 30 , and the separator 40 are stacked, the positive electrode 20 and the positive electrode lead 21 are connected, and the negative electrode 30 and the negative electrode lead 31 are connected.
  • the electrodes (positive electrode 20, negative electrode 30) of the battery 10 preferably have current collector folded portions. Moreover, the electrodes (positive electrode 20, negative electrode 30) of the battery 10 are preferably connected to the electrode leads (positive electrode lead 21, negative electrode lead 31) at the current collector folded portion.
  • the difference between the thickness of the electrode in the active material-coated portion and the thickness of the electrode lead connection portion (current collector exposed portion) becomes large. Distortion occurs in the electrode when it is connected to the current collector exposed portion. This distortion may cause a problem of capacity reduction due to peeling of the active material from the current collector, a problem of reaction unevenness due to uneven electrode spacing, and the like.
  • the thickness of the electrode in the active material coating portion and the electrode lead connection portion can be reduced. Therefore, it is possible to reduce the distortion of the electrode that occurs when connecting the electrode lead. Further, for example, when the total thickness of the active material coating portion and the separator is made equal to the total thickness of the current collector folded portion, it is possible to eliminate distortion of the electrode that occurs when connecting the electrode lead. In other words, it is possible to obtain a battery with little decrease in capacity and a battery with little unevenness in reaction.
  • the current collector folded part and the electrode lead it is preferable to weld the current collector folded part and the electrode lead.
  • a welding method for example, a welding method such as ultrasonic welding, resistance welding, or laser welding can be used.
  • the collector folded portion and the electrode lead may be sandwiched and fixed (sandwiched) by a fixing member.
  • the negative electrode 30 includes the first region 35 having the negative electrode current collector 32 and the negative electrode active material layer 33, the second region 36 where the negative electrode current collector 32 is exposed, and the negative electrode current collector 32. and a folded third region 37 .
  • a third region 37 is located inside the second region 36 .
  • the thickness W2 of the third region 37 is preferably thicker than the thickness of the negative electrode current collector 32, and the thickness W2 of the first region (active material It is more preferable that the thickness W2 of the third region 37 (current collector folded portion) is thicker than the thickness W1 of the coated portion).
  • the thickness W1 of the first region (active material coating portion) is 1
  • the thickness W2 of the third region 37 (current collector folded portion) is 0.5 or more and 2.5 or less. It is preferably 1.0 or more and 2.5 or less.
  • the negative electrode used in the battery of one embodiment of the present invention is not limited to the example shown in FIG. 2A.
  • the third region 37 made by folding a portion of the second region 36 of the negative electrode current collector 32 as shown in FIG. A part of the second region 36 may be wound to form the third region 37 .
  • the third region 37 shown in FIG. 2B may also be called a current collector winding portion.
  • the negative electrode used in the battery of one embodiment of the present invention is not only a single-sided coated electrode as shown in FIGS. 2A and 2B, but also has a structure in which the negative electrode current collector 32 is folded on both sides as shown in FIG. Therefore, it can also be applied to a double-sided coated electrode.
  • the thickness W2 of the third region 37 is preferably thicker than the thickness of the negative electrode current collector 32, and the thickness W2 of the first region (active material It is more preferable that the thickness W2 of the third region 37 (current collector folded portion) is thicker than the thickness W1 of the coated portion).
  • the thickness W1 of the first region (active material coating portion) is 1, the thickness W2 of the third region 37 (current collector folded portion) is 0.5 or more and 2.5 or less. It is preferably 1.0 or more and 2.5 or less.
  • the positive electrode 20 has the same structure as the negative electrode 30 shown in FIGS. 2A to 2C.
  • the thickness of the sixth region (collector folded portion) is preferably greater than the thickness of the positive electrode current collector 22, and the thickness of the fourth region (active material-coated portion) is preferably greater than the thickness of the sixth region. It is more preferable that the thickness of the region (folded portion of the current collector) is large. For example, when the thickness of the fourth region (active material-coated portion) is 1, the thickness of the sixth region (current collector folded portion) is 0.5 or more and 2.5 or less. It is preferably 1.0 or more and 2.5 or less.
  • 3A and 3B are schematic plan views of the electrode before the current collector is folded.
  • the positive electrode 20 shown in FIG. 3A has a positive electrode active material layer 23 and a positive electrode current collector 22 .
  • the positive electrode current collector 22 can be folded, for example, at the position indicated by the dashed line in the figure.
  • the negative electrode 30 shown in FIG. 3B has a negative electrode active material layer 33 and a negative electrode current collector 32 .
  • the negative electrode current collector 32 can be folded, for example, at the position indicated by the dashed-dotted line in the drawing.
  • FIGS. 4A to 4C are cross-sectional schematic diagrams showing an example of a laminate 60 in which the positive electrode 20, the negative electrode 30, and the separator 40 are laminated.
  • the cross-sectional schematic diagrams shown in FIGS. 4A to 4C are schematic cross-sectional diagrams of Y1-Y2 of the battery 10 shown in FIG. 1A, and the exterior body 50 is omitted. Also, for the positive electrode 20 and the negative electrode 30, illustration of current collectors and active material layers is omitted in order to avoid complication of the drawing.
  • the separator 40 has a region located between the positive electrode 20 and the negative electrode 30. As shown in FIGS. In other words, the positive electrode 20 and the negative electrode 30 have overlapping regions with the separator 40 interposed therebetween. Note that the separator 40 may have a region positioned between the positive electrode 20 and the outer casing 50 , or may have a region positioned between the negative electrode 30 and the outer casing 50 .
  • a laminate having a plurality of positive electrodes 20, a plurality of negative electrodes 30, and a plurality of separators 40 can be used, like the laminate 60A shown in FIG. 4A.
  • a laminate having a plurality of positive electrodes 20, a plurality of negative electrodes 30, and one separator 40 can be provided, like the laminate 60B and laminate 60C shown in FIGS. 4B and 4C.
  • the separator 40 can be positioned between the plurality of positive electrodes 20 and the plurality of negative electrodes 30 in a zigzag shape.
  • the separator 40 can be positioned between the plurality of positive electrodes 20 and the plurality of negative electrodes 30 in a wound shape.
  • FIGS. 5A and 5B are diagrams extracting a part of the schematic cross-sectional view of the battery 10 shown in FIG. 1B.
  • the thickness of the current collector folded portion in the laminate 60 will be described with reference to FIGS. 5A and 5B.
  • FIG. 5A is a schematic diagram showing a cross section in the vicinity of the connecting portion between the positive electrode 20 and the positive electrode lead 21 in the laminate 60.
  • the positive electrode 20 has a fourth region 25 having a positive electrode active material layer 23 on a positive electrode current collector 22 and a fifth region 26 where the positive electrode current collector 22 is exposed. , has a sixth region 27 where the positive electrode current collector 22 is folded. Also, the positive electrode 20 is laminated with the negative electrode 30 and the separator 40 in the fourth region 25 and connected to the positive electrode lead 21 in the sixth region 27 .
  • connection between the sixth region 27 and the positive electrode lead 21 it is preferable to weld the sixth region 27 and the positive electrode lead 21 together.
  • a welding method for example, a welding method such as ultrasonic welding, resistance welding, or laser welding can be used.
  • the sixth region 27 and the positive electrode lead 21 may be sandwiched and fixed (held) by a fixing member.
  • the total thickness of the regions where the fourth region 25 of the positive electrode 20, the negative electrode 30, and the separator 40 are laminated is the thickness W3, and the total thickness of the sixth region 27 provided in the positive electrode 20 is Let the thickness be W4.
  • the thickness W3 is 1, the thickness W4 is preferably 0.5 or more and 1.2 or less, more preferably 0.7 or more and 1.1 or less, and 0.8 or more. It is more preferably 1 or less.
  • FIG. 5B is a schematic diagram showing a cross section in the vicinity of the connecting portion between the negative electrode 30 and the negative electrode lead 31 in the laminate 60.
  • the negative electrode 30 is laminated with the positive electrode 20 and the separator 40 in the first region 35 and connected to the negative electrode lead 31 in the third region 37 .
  • the third region 37 and the negative electrode lead 31 it is preferable to weld the third region 37 and the negative electrode lead 31 together.
  • a welding method for example, a welding method such as ultrasonic welding, resistance welding, or laser welding can be used.
  • the third region 37 and the negative electrode lead 31 may be sandwiched and fixed (sandwiched) by a fixing member.
  • the total thickness of the regions in which the first region 35 of the negative electrode 30, the positive electrode 20, and the separator 40 are laminated is defined as a thickness W3, and the total thickness of the third region 37 provided in the negative electrode 30 is W3.
  • the thickness W5 is preferably 0.5 or more and 1.2 or less, more preferably 0.7 or more and 1.1 or less, and 0.8 or more. It is more preferably 1 or less.
  • FIG. 6A and 6B show an example of a laminated body 60 in which is fixed (sandwiched) by sandwiching between the negative electrode leads 31.
  • each of the positive electrode lead 21 and the negative electrode lead 31 may be composed of one component, or may be composed of two or more components fixed by screws or the like as shown in FIG. 6B. There may be.
  • the positive electrode lead 21 preferably has a region that contacts not only one face of the sixth region 27 but also two faces.
  • the negative electrode lead 31 has a region that contacts not only one surface of the third region 37 but also two surfaces thereof.
  • the positive electrode lead 21 has a structure in contact with the plurality of positive electrodes 20 .
  • the negative electrode lead 31 preferably has a structure in which it is in contact with the plurality of negative electrodes 30 . With such a structure, the contact area between the positive electrode 20 and the positive electrode lead 21 can be increased, and the contact resistance can be reduced. Similarly, the contact area between the negative electrode 30 and the negative electrode lead 31 can be increased, and the contact resistance can be reduced.
  • the total thickness of the active material coating portion (the first region 35 and the fourth region 25) and the separator 40 and the current collector folded portion (the third region 37 and the sixth region 27) ) is within the above numerical range, it is possible to reduce the distortion that occurs in the laminate 60 when connecting the electrode leads (the positive electrode lead 21 and the negative electrode lead 31). In other words, it is possible to obtain a battery with little decrease in capacity and a battery with little unevenness in reaction.
  • the positive electrode lead 21 and the negative electrode lead 31 of the battery 10 are provided at one end of the battery 10 and the opposite end of the battery 10, respectively.
  • the arrangement of the lead 21 and the negative lead 31 is not limited to these examples.
  • it can have the shape of the positive electrode 20 shown in FIG. 7A and the shape of the negative electrode 30 shown in FIG. 7B.
  • both the positive lead 21 and the negative lead 31 can be provided at one end of the battery, as in the battery 10B shown in FIG. 7C.
  • both the positive electrode lead 21 and the negative electrode lead 31 may be provided on the short sides of the battery, or, as in the battery 10C shown in FIG. 8A, the positive electrode lead 21 and the negative electrode lead may be provided. Both 31 may be provided on the long sides of the battery.
  • the structure may be such that the positive electrode lead 21 is provided on the short side of the battery and the negative electrode lead 31 is provided on the long side of the battery.
  • the positive electrode lead 21 may be provided on the long side of the battery, and the negative electrode lead 31 may be provided on the short side of the battery.
  • the battery of one embodiment of the present invention is not limited to the stacked battery structure.
  • the batteries having the wound battery structures shown in FIGS. 9 and 10 are also batteries of one embodiment of the present invention.
  • the schematic diagram shown in FIG. 9 shows a method of manufacturing the wound body 61 by stacking the positive electrode 20, the negative electrode 30, and the plurality of separators 40 and winding them into a flat shape.
  • the positive electrode current collector 22 included in the positive electrode 20 has a region in contact with the positive electrode active material layer 23 and a plurality of projecting portions 28 from which the positive electrode current collector exposed portion protrudes.
  • a folding section 29 is provided.
  • the negative electrode current collector 32 included in the negative electrode 30 has a region in contact with the negative electrode active material layer 33 and a plurality of projecting portions 38 from which the negative electrode current collector exposed portions protrude. A section 39 is provided.
  • Each of the plurality of positive electrode current collector folded portions 29 and the plurality of negative electrode current collector folded portions 39 has an overlapping region in the wound body 61 . Further, as shown in FIG. 10A , the positive electrode current collector folded portion 29 is connected to the positive electrode lead 21 , and the negative electrode current collector folded portion 39 is connected to the negative electrode lead 31 . Note that the exterior body 52 has a positive electrode lead 21 and a negative electrode lead 31 .
  • the current collector folded part and the electrode lead are welded. good.
  • a welding method for example, a welding method such as ultrasonic welding, resistance welding, or laser welding can be used.
  • the collector folded portion and the electrode lead may be sandwiched and fixed (sandwiched) by a fixing member.
  • the total thickness of the positive electrode current collector folded portion 29 and the total thickness of the negative electrode current collector folded portion 39 are the same as the range of the thickness W4 and the thickness W5 shown in the description of FIG. A range is preferred.
  • the thickness of the positive electrode current collector folded portion 29 is The total thickness is preferably 0.5 or more and 1.2 or less, more preferably 0.7 or more and 1.1 or less, and more preferably 0.8 or more and 1 or less.
  • the thickness of the negative electrode current collector folded portion 39 is The total thickness is preferably 0.5 or more and 1.2 or less, more preferably 0.7 or more and 1.1 or less, and more preferably 0.8 or more and 1 or less.
  • the wound body 61 connected to the positive electrode lead 21 and the negative electrode lead 31 of the exterior body 52 is arranged inside the exterior body 53, and the exterior body 52 and the exterior body 53 are connected. In this manner, the wound body 61 is enclosed in the exterior body 52 and the exterior body 53 , and the positive electrode lead 21 and the negative electrode lead 31 extend from the inside of the exterior body 52 and the exterior body 53 to the outside, respectively.
  • the battery of one embodiment of the present invention can have flexibility.
  • a battery 10E having an outer package 54 having unevenness has flexibility.
  • FIG. 11B is a schematic diagram showing a cross section along B1-B2 in FIG. 11A, showing a state in which the battery 10E is bent.
  • the battery 10E can include the laminate 60 shown in FIG. 1 and the like. The details of the exterior body having unevenness will be described later.
  • the positive electrode 20, the negative electrode 30, the electrolyte, the separator 40, and the film that can be used as the exterior body will be described.
  • the battery 10 and the like have an electrolyte.
  • the space enclosed by the outer package has an electrolyte
  • the laminate 60 has an electrolyte
  • the wound body 61 has an electrolyte
  • the positive electrode 20 has an electrolyte
  • the negative electrode 30 has an electrolyte
  • the separator 40 has an electrolyte. and so on.
  • the negative electrode has a negative electrode active material layer and a negative electrode current collector.
  • the negative electrode active material layer may have a negative electrode active material, and may further have a conductive material and a binder.
  • a metal foil for example, can be used as the current collector.
  • a negative electrode can be formed by applying a slurry onto a metal foil and drying it. In addition, you may add a press after drying. The negative electrode is obtained by forming an active material layer on a current collector.
  • a slurry is a material liquid used to form an active material layer on a current collector, and refers to a liquid containing an active material, a binder, and a solvent, and preferably further mixed with a conductive material.
  • the slurry may be called electrode slurry or active material slurry, and may be called negative electrode slurry when forming a negative electrode active material layer.
  • a carbon material or an alloy material can be used as the negative electrode active material.
  • carbon materials examples include graphite (natural graphite, artificial graphite), graphitizable carbon (soft carbon), non-graphitizable carbon (hard carbon), carbon fiber (carbon nanotube), graphene, carbon black, and the like. can.
  • Graphite includes artificial graphite and natural graphite.
  • artificial graphite include mesocarbon microbeads (MCMB), coke-based artificial graphite, and pitch-based artificial graphite.
  • Spherical graphite having a spherical shape can be used as the artificial graphite.
  • MCMB may have a spherical shape and are preferred.
  • MCMB is also relatively easy to reduce its surface area and may be preferred.
  • natural graphite include flake graphite and spherical natural graphite.
  • Graphite exhibits a potential as low as that of lithium metal when lithium ions are inserted into graphite (at the time of formation of a lithium-graphite intercalation compound) (0.05 V or more and 0.3 V or less vs. Li/Li + ). Accordingly, a lithium-ion battery using graphite can exhibit a high operating voltage. Furthermore, graphite is preferable because it has advantages such as relatively high capacity per unit volume, relatively small volume expansion, low cost, and high safety compared to lithium metal.
  • Non-graphitizable carbon can be obtained, for example, by firing synthetic resins such as phenolic resins and plant-derived organic substances.
  • the non-graphitizable carbon contained in the negative electrode active material of the lithium ion battery of one embodiment of the present invention has a (002) plane spacing of 0.34 nm or more and 0.50 nm or less as measured by X-ray diffraction (XRD). , and more preferably 0.35 nm or more and 0.42 nm or less.
  • the negative electrode active material can use an element capable of undergoing charge/discharge reaction by alloying/dealloying reaction with lithium.
  • an element capable of undergoing charge/discharge reaction by alloying/dealloying reaction with lithium for example, materials containing at least one of silicon, tin, gallium, aluminum, germanium, lead, antimony, bismuth, silver, zinc, cadmium, indium, etc. can be used.
  • Such an element has a larger capacity than carbon, and silicon in particular has a high theoretical capacity of 4200 mAh/g. Therefore, it is preferable to use silicon for the negative electrode active material. Compounds containing these elements may also be used.
  • elements capable of undergoing charge-discharge reactions by alloying/dealloying reactions with lithium, compounds containing such elements, and the like are sometimes referred to as alloy-based materials.
  • SiO refers to silicon monoxide, for example.
  • SiO can be represented as SiO x .
  • x preferably has a value of 1 or close to 1.
  • x is preferably 0.2 or more and 1.5 or less, and preferably 0.3 or more and 1.2 or less.
  • titanium dioxide TiO2
  • lithium titanium oxide Li4Ti5O12
  • lithium -graphite intercalation compound LixC6
  • niobium pentoxide Nb2O5
  • oxide Oxides such as tungsten (WO 2 ) and molybdenum oxide (MoO 2 ) can be used.
  • Li 2.6 Co 0.4 N 3 exhibits a large discharge capacity (900 mAh/g, 1890 mAh/cm 3 ) and is preferred.
  • lithium ions are contained in the negative electrode active material, so that it can be combined with materials such as V 2 O 5 and Cr 3 O 8 that do not contain lithium ions as the positive electrode active material, which is preferable.
  • materials such as V 2 O 5 and Cr 3 O 8 that do not contain lithium ions as the positive electrode active material, which is preferable.
  • a composite nitride of lithium and a transition metal can be used as the negative electrode active material by preliminarily desorbing the lithium ions contained in the positive electrode active material.
  • a material that causes a conversion reaction can also be used as the negative electrode active material.
  • transition metal oxides such as cobalt oxide (CoO), nickel oxide (NiO), and iron oxide (FeO) that do not form an alloy with lithium may be used as the negative electrode active material.
  • oxides such as Fe2O3 , CuO, Cu2O , RuO2 and Cr2O3 , sulfides such as CoS0.89 , NiS and CuS, and Zn3N2 , Cu 3 N, Ge 3 N 4 and other nitrides, NiP 2 , FeP 2 and CoP 3 and other phosphides, and FeF 3 and BiF 3 and other fluorides.
  • negative electrode active material can be used from among the negative electrode active materials shown above, a plurality of types can also be used in combination. For example, a combination of a carbon material and silicon or a combination of a carbon material and silicon monoxide can be used.
  • the negative electrode may be a negative electrode that does not have a negative electrode active material at the end of the production of the battery.
  • the negative electrode without a negative electrode active material for example, a negative electrode having only a negative electrode current collector at the end of battery production, lithium ions desorbed from the positive electrode active material by charging the battery are deposited on the negative electrode current collector.
  • a negative electrode deposited as lithium metal to form a negative electrode active material layer can be used.
  • a battery using such a negative electrode is sometimes called a negative electrode-free (anode-free) battery, a negative electrode-less (anode-less) battery, or the like.
  • the negative electrode current collector may have a film for uniform deposition of lithium.
  • a film for uniform deposition of lithium for example, a solid electrolyte having lithium ion conductivity can be used.
  • the solid electrolyte a sulfide-based solid electrolyte, an oxide-based solid electrolyte, a polymer-based solid electrolyte, or the like can be used.
  • the polymer solid electrolyte is suitable as a film for uniform deposition of lithium because it is relatively easy to form a uniform film on the negative electrode current collector.
  • a metal film forming an alloy with lithium can be used as a film for uniformizing deposition of lithium.
  • a magnesium metal film for example, can be used as the metal film forming an alloy with lithium. Since lithium and magnesium form a solid solution in a wide composition range, it is suitable as a film for uniform deposition of lithium.
  • a negative electrode current collector having unevenness can be used.
  • the concave portions of the negative electrode current collector become cavities in which lithium contained in the negative electrode current collector is easily deposited, so that when lithium is deposited, it is suppressed to form a dendrite shape. can do.
  • ⁇ Binder> As the binder, it is preferable to use rubber materials such as styrene-butadiene rubber (SBR), styrene-isoprene-styrene rubber, acrylonitrile-butadiene rubber, butadiene rubber, and ethylene-propylene-diene copolymer. Fluororubber can also be used as the binder.
  • SBR styrene-butadiene rubber
  • styrene-isoprene-styrene rubber acrylonitrile-butadiene rubber
  • butadiene rubber butadiene rubber
  • Fluororubber can also be used as the binder.
  • the binder it is preferable to use, for example, a water-soluble polymer.
  • Polysaccharides for example, can be used as the water-soluble polymer.
  • cellulose derivatives such as carboxymethyl cellulose (CMC), methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, diacetyl cellulose, regenerated cellulose, starch, and the like can be used. Further, it is more preferable to use these water-soluble polymers in combination with the aforementioned rubber material.
  • Binders may be used in combination with more than one of the above.
  • a material having a particularly excellent viscosity adjusting effect may be used in combination with another material.
  • rubber materials are excellent in adhesive strength and elasticity, but on the other hand, it may be difficult to adjust the viscosity when they are mixed with a solvent. In such a case, for example, it is preferable to mix with a material having a particularly excellent viscosity-adjusting effect.
  • a water-soluble polymer may be used as a material having a particularly excellent viscosity-adjusting effect.
  • the aforementioned polysaccharides such as carboxymethyl cellulose (CMC), methyl cellulose, ethyl cellulose, hydroxypropyl cellulose and diacetyl cellulose, cellulose derivatives such as regenerated cellulose, or starch are used. be able to.
  • solubility of cellulose derivatives such as carboxymethyl cellulose is increased by making them into salts such as sodium salts or ammonium salts of carboxymethyl cellulose, making it easier for them to exert their effects as viscosity modifiers.
  • the higher solubility also allows for better dispersibility with the active material or other constituents when preparing the electrode slurry.
  • cellulose and cellulose derivatives used as binders for electrodes also include salts thereof.
  • the water-soluble polymer stabilizes the viscosity, and can stably disperse the active material and other materials combined as a binder, such as styrene-butadiene rubber, in the aqueous solution.
  • a binder such as styrene-butadiene rubber
  • the active material since it has a functional group, it is expected to be stably adsorbed on the surface of the active material.
  • many cellulose derivatives such as carboxymethyl cellulose are materials having functional groups such as hydroxyl groups or carboxyl groups, and due to the presence of functional groups, the macromolecules interact with each other, and the surface of the active material is often covered extensively. Be expected.
  • the binder that covers or contacts the surface of the active material forms a film
  • it is expected to play a role as a passive film and suppress the decomposition of the electrolyte.
  • the "passive film” is a film with no electrical conductivity or a film with extremely low electrical conductivity.
  • WHEREIN The decomposition
  • the conductive material is also called a conductive agent or a conductive aid, and a carbon material is used.
  • a conductive agent or a conductive aid
  • a carbon material is used.
  • Active material layers such as the positive electrode active material layer and the negative electrode active material layer preferably contain a conductive material.
  • Examples of the conductive material include carbon black such as acetylene black and furnace black, graphite such as artificial graphite and natural graphite, carbon fiber such as carbon nanofiber and carbon nanotube, and graphene compound. More than one species can be used.
  • carbon fibers for example, carbon fibers such as mesophase pitch-based carbon fibers and isotropic pitch-based carbon fibers can be used.
  • Carbon nanofibers, carbon nanotubes, or the like can be used as carbon fibers.
  • Carbon nanotubes can be produced, for example, by vapor deposition.
  • the graphene compound refers to graphene, multi-layer graphene, multi-graphene, graphene oxide, multi-layer graphene oxide, multi-graphene oxide, reduced graphene oxide, reduced multi-layer graphene oxide, reduced multi-graphene oxide, and graphene. Including quantum dots, etc.
  • a graphene compound refers to a compound that contains carbon, has a shape such as a plate shape or a sheet shape, and has a two-dimensional structure formed of six-membered carbon rings. The two-dimensional structure formed by the six-membered carbon rings may be called a carbon sheet.
  • the graphene compound may have functional groups.
  • the graphene compound preferably has a bent shape.
  • the graphene compound may be rolled up like carbon nanofibers.
  • the active material layer may have metal powder or metal fiber such as copper, nickel, aluminum, silver, gold, etc., conductive ceramics material, etc. as a conductive material.
  • the content of the conductive material with respect to the total amount of the active material layer is preferably 1 wt% or more and 10 wt% or less, more preferably 1 wt% or more and 5 wt% or less.
  • the graphene compound Unlike a granular conductive material such as carbon black that makes point contact with the active material, the graphene compound enables surface contact with low contact resistance. It is possible to improve the electrical conductivity with Therefore, the ratio of the active material in the active material layer can be increased. Thereby, the discharge capacity of the battery can be increased.
  • Particulate carbon-containing compounds such as carbon black, graphite, etc., or fibrous carbon-containing compounds such as carbon nanotubes, easily enter minute spaces.
  • a minute space refers to, for example, a region between a plurality of active materials.
  • ⁇ Current collector> As the current collector, metals such as stainless steel, gold, platinum, zinc, iron, copper, aluminum, and titanium, and alloys thereof, which are highly conductive and do not alloy with carrier ions such as lithium, can be used. .
  • the shape of the current collector can be appropriately used such as a sheet shape, a mesh shape, a punching metal shape, an expanded metal shape, and the like.
  • a resin current collector can be used as the current collector.
  • resins such as polyolefin (polypropylene, polyethylene, etc.), nylon (polyamide), polyimide, vinylon, polyester, acrylic, polyurethane, etc., and particulate or fibrous conductive materials (also called conductive fillers) can be used.
  • the conductive material of the resin current collector one or more of conductive carbon materials and metal materials such as aluminum, titanium, stainless steel, gold, platinum, zinc, iron, and copper can be used.
  • the conductive carbon material for example, any one of carbon black such as acetylene black and furnace black, graphite such as artificial graphite and natural graphite, carbon fiber such as carbon nanofiber and carbon nanotube, graphene and graphene compound, or Two or more kinds can be used.
  • an antioxidant such as a hindered phenol-based material.
  • carbon fibers for example, carbon fibers such as mesophase pitch-based carbon fibers and isotropic pitch-based carbon fibers can be used.
  • Carbon nanofibers, carbon nanotubes, or the like can be used as carbon fibers.
  • Carbon nanotubes can be produced, for example, by vapor deposition.
  • the average particle size can be 10 nm or more and 10 ⁇ m or less, preferably 30 nm or more and 5 ⁇ m or less.
  • a current collector having a thickness of 5 ⁇ m or more and 30 ⁇ m or less.
  • the negative electrode current collector it is preferable to use a material that does not alloy with carrier ions such as lithium.
  • the positive electrode has a positive electrode active material layer and a positive electrode current collector.
  • the positive electrode active material layer contains a positive electrode active material and may further contain at least one of a conductive material and a binder.
  • As the positive electrode current collector, conductive material, and binder those described in [Negative electrode] can be used.
  • a metal foil for example, can be used as the current collector.
  • the positive electrode can be formed by applying a slurry onto a metal foil and drying it. In addition, you may add a press after drying.
  • the positive electrode is obtained by forming an active material layer on a current collector.
  • a slurry is a material liquid used to form an active material layer on a current collector, and refers to a liquid containing an active material, a binder, and a solvent, and preferably further mixed with a conductive material. Note that the slurry may be called an electrode slurry or an active material slurry, and may be called a positive electrode slurry when forming a positive electrode active material layer.
  • any one or more of a composite oxide having a layered rock salt structure, a composite oxide having an olivine structure, and a composite oxide having a spinel structure can be used.
  • any one or more of lithium cobaltate, nickel-cobalt-lithium manganate, nickel-cobalt-lithium aluminum oxide, and nickel-manganese-lithium aluminum oxide can be used as the composite oxide having a layered rock salt structure.
  • the composition formula can be represented as LiM1O 2 (M1 is one or more selected from nickel, cobalt, manganese, and aluminum), but the coefficients of the composition formula are not limited to integers.
  • lithium cobaltate to which magnesium and fluorine are added can be used as lithium cobaltate.
  • the composite oxide having an olivine structure one or more of lithium iron phosphate, lithium manganese phosphate, lithium cobalt phosphate, and lithium iron manganese phosphate can be used.
  • the composition formula can be expressed as LiM2PO 4 (M2 is one or more selected from iron, manganese, and cobalt), but the coefficients of the composition formula are not limited to integers.
  • a composite oxide having a spinel structure such as LiMn 2 O 4 can be used.
  • electrolytes examples of electrolytes are described below.
  • a liquid electrolyte also referred to as an electrolytic solution
  • electrolyte containing a solvent and an electrolyte dissolved in the solvent
  • the electrolyte is not limited to a liquid electrolyte (electrolytic solution) that is liquid at room temperature, and a solid electrolyte can also be used.
  • an electrolyte (semi-solid electrolyte) containing both a liquid electrolyte that is liquid at room temperature and a solid electrolyte that is solid at room temperature can be used.
  • a solid electrolyte or a semi-solid electrolyte is used for a bendable battery, the flexibility of the battery can be maintained by providing a structure in which a part of the laminate inside the battery contains the electrolyte.
  • DMC dimethyl carbonate
  • DEC diethyl carbonate
  • Ionic liquids consist of cations and anions, including organic cations and anions.
  • Organic cations include aliphatic onium cations such as quaternary ammonium, tertiary sulfonium, and quaternary phosphonium cations, and aromatic cations such as imidazolium and pyridinium cations.
  • a monovalent amide anion a monovalent methide anion, a fluorosulfonate anion, a perfluoroalkylsulfonate anion, a tetrafluoroborate anion, a perfluoroalkylborate anion, a hexafluorophosphate anion, or a perfluoro Alkyl phosphate anions and the like are included.
  • a battery of one embodiment of the present invention includes, as carrier ions, alkali metal ions such as lithium ions, sodium ions, and potassium ions, and alkaline earth metal ions such as calcium ions, strontium ions, barium ions, beryllium ions, and magnesium ions. .
  • alkali metal ions such as lithium ions, sodium ions, and potassium ions
  • alkaline earth metal ions such as calcium ions, strontium ions, barium ions, beryllium ions, and magnesium ions.
  • the electrolyte contains a lithium salt.
  • Lithium salts such as LiPF6 , LiClO4 , LiAsF6, LiBF4 , LiAlCl4 , LiSCN , LiBr, LiI , Li2SO4 , Li2B10Cl10 , Li2B12Cl12 , LiCF3SO3 , LiC4F9SO3 , LiC ( CF3SO2 ) 3 , LiC( C2F5SO2 ) 3 , LiN( CF3SO2 ) 2 , LiN ( C4F9SO2 ) ( CF3SO2 ), LiN(C 2 F 5 SO 2 ) 2 and the like can be used.
  • Examples of the organic solvent described in this embodiment include ethylene carbonate (EC), ethylmethyl carbonate (EMC), and dimethyl carbonate (DMC), and these ethylene carbonate, ethylmethyl carbonate, and dimethyl carbonate
  • EC ethylene carbonate
  • EMC ethylmethyl carbonate
  • DMC dimethyl carbonate
  • EC ethylene carbonate
  • EMC ethylmethyl carbonate
  • DMC dimethyl carbonate
  • x: y: 100-x-y (where 5 ⁇ x ⁇ 35 and 0 ⁇ y ⁇ 65.) can be used.
  • the electrolytic solution has a low content of particulate matter or elements other than constituent elements of the electrolytic solution (hereinafter also simply referred to as "impurities") and is highly purified.
  • the weight ratio of impurities to the electrolytic solution is preferably 1% or less, preferably 0.1% or less, and more preferably 0.01% or less.
  • VC vinylene carbonate
  • PS propane sultone
  • TB tert-butylbenzene
  • FEC fluoroethylene carbonate
  • LiBOB lithium bis(oxalate)borate
  • dinitrile compounds of succinonitrile or adiponitrile may be added.
  • concentration of the additive may be, for example, 0.1 wt % or more and 5 wt % or less with respect to the solvent.
  • the electrolyte has a polymeric material that can be gelled, which increases safety against liquid leakage and the like.
  • gelled polymer materials include silicone gel, acrylic gel, acrylonitrile gel, polyethylene oxide gel, polypropylene oxide gel, and fluoropolymer gel.
  • polymers having a polyalkylene oxide structure such as polyethylene oxide (PEO), PVDF, polyacrylonitrile, etc., and copolymers containing them can be used.
  • PVDF-HFP which is a copolymer of PVDF and hexafluoropropylene (HFP)
  • the formed polymer may also have a porous geometry.
  • separator When the electrolyte includes an electrolytic solution, a separator is placed between the positive and negative electrodes.
  • separators include fibers containing cellulose such as paper, non-woven fabrics, glass fibers, ceramics, or synthetic materials using nylon (polyamide), polyimide, vinylon (polyvinyl alcohol fiber), polyester, acrylic, polyolefin, and polyurethane. Those formed of fibers or the like can be used. It is preferable that the separator be processed into a bag shape and arranged so as to enclose either the positive electrode or the negative electrode.
  • the separator may have a multilayer structure.
  • an organic material film such as polypropylene or polyethylene can be coated with a ceramic material, a fluorine material, a polyamide material, a polyimide material, or a mixture thereof.
  • the ceramic material for example, aluminum oxide particles, silicon oxide particles, or the like can be used.
  • PVDF, polytetrafluoroethylene, or the like can be used as the fluorine-based material.
  • polyamide-based material for example, nylon, aramid (meta-aramid, para-aramid) and the like can be used.
  • Coating with a ceramic material improves oxidation resistance, so it is possible to suppress the deterioration of the separator during high-voltage charging and discharging and improve the reliability of the battery.
  • the separator and the electrode are more likely to adhere to each other, and the output characteristics can be improved.
  • Coating with a polyamide-based material, particularly aramid improves heat resistance and thus improves the safety of the battery.
  • both sides of a polypropylene film may be coated with a mixed material of aluminum oxide and aramid.
  • a polypropylene film may be coated with a mixed material of aluminum oxide and aramid on the surface thereof in contact with the positive electrode, and coated with a fluorine-based material on the surface thereof in contact with the negative electrode.
  • the safety of the battery can be maintained even if the overall thickness of the separator is thin, so the capacity per unit volume of the battery can be increased.
  • Metal materials such as aluminum, stainless steel, and titanium, or resin materials can be used for the exterior body of the battery.
  • a film-like exterior body can also be used.
  • the film for example, a film made of a material such as polyethylene, polypropylene, polycarbonate, ionomer, or polyamide is provided with a highly flexible metal thin film or metal foil made of aluminum, stainless steel, titanium, copper, nickel, or the like.
  • a film having a three-layer structure in which an insulating synthetic resin film such as a polyamide-based resin or a polyester-based resin is provided on a metal thin film as the outer surface of the exterior body can be used.
  • a film having such a multilayer structure can be called a laminate film.
  • the laminate film may be called an aluminum (aluminum) laminate film, a stainless steel laminate film, a titanium laminate film, a copper laminate film, a nickel laminate film, or the like.
  • the material or thickness of the metal layer of the laminate film may affect the flexibility of the battery. It is preferable to use, for example, an aluminum laminate film having a polypropylene layer, an aluminum layer, and nylon as an exterior body used for a battery that is excellent in flexibility (bendable).
  • the thickness of the aluminum layer is preferably 50 ⁇ m or less, more preferably 40 ⁇ m or less, more preferably 30 ⁇ m or less, and more preferably 20 ⁇ m or less. If the aluminum layer is thinner than 10 ⁇ m, pinholes in the aluminum layer may degrade the gas barrier properties, so the thickness of the aluminum layer is preferably 10 ⁇ m or more.
  • a graphene sheet may be used instead of the metal layer.
  • a graphene sheet a multilayer graphene sheet with a thickness of 100 nm or more and 30 ⁇ m or less, preferably 200 nm or more and 20 ⁇ m or less can be used. Since the graphene sheet is flexible and the distance between graphene layers is 0.34 nm and it has gas barrier properties, it is suitable as a film to be used as an exterior body of a battery.
  • the laminate film for example, a laminate having a heat seal layer on one side or both sides of a metal film can be used.
  • the adhesive layer can use a heat-fusible resin film containing polypropylene, polyethylene, or the like.
  • an aluminum laminate film is used, which has a nylon resin on the front surface of the aluminum foil, and a lamination of an acid-resistant polypropylene film and a polypropylene film on the rear surface of the aluminum foil.
  • the film is embossed. As a result, a film having an uneven shape can be produced.
  • the film has a visible wavy pattern by having a plurality of uneven portions.
  • FIG. 12 is a cross-sectional view showing an example of embossing.
  • embossing is a type of press work, and refers to a process in which an embossing roll having an uneven surface is brought into pressure contact with a film to form unevenness corresponding to the unevenness of the embossing roll on the film.
  • the embossing roll is a roll having a pattern engraved on its surface.
  • FIG. 12 is an example of embossing on both sides of the film. Also, it is a method of forming a film having a convex portion having a top portion on one surface side.
  • FIG. 12 shows a state in which the film 90 is sandwiched between an embossing roll 95 in contact with one surface of the film and an embossing roll 96 in contact with the other surface, and the film 90 is being fed in a film traveling direction 91. showing.
  • a pattern is formed on the film surface by pressure or heat.
  • a pattern may be formed on the film surface by both pressure and heat.
  • embossing roll metal rolls, ceramics rolls, plastic rolls, rubber rolls, organic resin rolls, wood rolls, etc. can be used as appropriate.
  • embossing is performed using an embossing roll 96 that is an embossing roll with a male handle and an embossing roll 95 with a female handle.
  • the male handle embossing roll 96 has a plurality of protrusions 96a.
  • the projections correspond to the projections formed on the film to be processed.
  • the female handle embossing roll 95 has a plurality of protrusions 95a.
  • the adjacent projections 95a form recesses that fit into the projections formed on the film by the projections 96a provided on the embossing roll 96 with a male handle.
  • the convex part and the flat part can be continuously formed. As a result, a pattern can be formed on the film 90 .
  • FIGS. 13A to 13E a film having a plurality of projections with a shape different from that of FIG. 12 will be described with reference to FIGS. 13A to 13E.
  • embossing of various cross-sectional shapes shown in FIGS. 13A to 13E can be performed.
  • FIG. 13A is a cross-sectional schematic diagram of an emboss having a wavy shape
  • FIGS. 13B to 13E are modifications of FIG. 13A
  • 13B and 13C are diagrams showing an example of forming the wavy shape in steps
  • FIG. 13D is a diagram showing an example of forming the wavy shape into a rectangular shape
  • FIG. It is a figure which shows the example formed by the valley shape and the peak shape of a trapezoid.
  • FIGS. 14A and 14B are bird's-eye views showing finished shapes when the embossing shown in FIGS. 12 to 13E is performed twice while changing the direction of the film 90.
  • a film with the embossed shape shown (which can be referred to as a cross-corrugated shape) can be obtained.
  • the film 81a having the intersecting wave shape shown in FIG. 14A shows the outer shape used when manufacturing a battery with one sheet of film 81a, and can be used by being folded in two along the dashed line.
  • a plurality of films (film 81b, film 81c) having a cross-wave shape shown in FIG. and the film 81c can be overlapped and used.
  • the film can be processed without being cut, it is excellent in mass productivity.
  • the film may be processed by pressing against the film a pair of embossing plates having an uneven surface, for example, without being limited to the processing using the embossing rolls. At this time, one side of the embossed plate may be flat, and may be processed in multiple steps.
  • the configuration of the battery of one embodiment of the present invention is not limited to this.
  • the battery can have an embossed shape on one surface of the battery and a non-embossed shape on the other surface of the battery.
  • the exterior body on one side of the battery and the exterior body on the other side may have different embossed shapes.
  • An electronic device 6500 shown in FIG. 15A is a mobile information terminal that can be used as a smartphone.
  • the electronic device 6500 has at least a first housing 6501a, a second housing 6501b, a hinge section 6519, a display section 6502a, a power button 6503, a button 6504, a speaker 6505, and a microphone 6506.
  • the display portion 6502a has a touch panel function.
  • the first housing 6501a and the second housing 6501b are connected via a hinge portion 6519.
  • the electronic device 6500 can be bent at the hinge portion 6519 .
  • FIG. 15B is a schematic cross-sectional view including the end of the housing 6501 (6501a, 6501b) on the microphone 6506 side.
  • a light-transmitting protective member 6510 is provided on the display surface side of the housing 6501 (6501a, 6501b).
  • An optical member 6512, a touch sensor panel 6513, a printed circuit board 6517, and a first battery 6518a are arranged.
  • a display panel 6511, an optical member 6512, and a touch sensor panel 6513 are fixed to the protective member 6510 with an adhesive layer (not shown).
  • a portion of the display panel 6511 is folded back in a region outside the display portion 6502a, and the FPC 6515 is connected to the folded portion.
  • An IC6516 is mounted on the FPC6515.
  • the FPC 6515 is connected to terminals provided on the printed circuit board 6517 .
  • a flexible display can be applied to the display panel 6511.
  • a flexible display includes a plurality of light-emitting elements that are formed using a plurality of flexible films and are arranged in a matrix.
  • an EL element also referred to as an EL device
  • Examples of light-emitting substances that EL devices have include substances that emit fluorescence (fluorescent materials), substances that emit phosphorescence (phosphorescent materials), inorganic compounds (quantum dot materials, etc.), and substances that exhibit heat-activated delayed fluorescence (heat-activated delayed fluorescence (TADF) material) and the like.
  • LEDs such as micro LED, can also be used as a light emitting element.
  • the display panel 6511 can be provided to overlap with the first housing 6501a, the second housing 6501b, and the hinge portion 6519, and the display panel 6511 can be folded at the hinge portion 6519. becomes possible.
  • the internal space of the housing 6501 (6501a, 6501b) can be effectively used, and an extremely lightweight electronic device can be realized.
  • the display panel 6511 is extremely thin, the thickness of the electronic device can be reduced and the first battery 6518a with a large capacity can be mounted.
  • the electronic device 6500 has a configuration in which a second battery 6518b is provided inside the cover portion 6520 in order to use a large-capacity battery. are electrically connected.
  • the flexible battery of one embodiment of the present invention can be applied to the first battery 6518a and the second battery 6518b.
  • the battery can be provided in a position overlapping with the first housing 6501a, the second housing 6501b, and the hinge portion 6519, and the battery can be bent at the hinge portion 6519. Become.
  • part of the electronic device 6500 can be folded to be downsized and highly portable.
  • Device 6500 can be implemented.
  • FIG. 16A is a perspective view showing a state where the dotted line portion in FIG. 15A is folded.
  • the electronic device 6500 can be folded in two, and the display portion 6502a and the second battery 6518b can be repeatedly folded.
  • FIG. 16A has a configuration in which a display portion 6502b is provided in a portion where the cover portion 6520 is slid by folding. Even when the display is folded in two, the user can visually confirm a simple time display or notification display of mail reception by visually recognizing the display portion 6502b.
  • FIG. 16B schematically illustrates a cross-sectional state of the cover portion when the electronic device 6500 is folded.
  • the inside of housing 6501 (6501a, 6501b) is not shown for simplicity.
  • the hinge part 6519 can also be called a connection part, and is not limited to the example of the structure in which a plurality of columnar bodies are connected, and can have various forms. In particular, it is preferable to have a mechanism for bending the display portion 6502a and the second battery 6518b without extending or contracting them.
  • the second battery 6518b is illustrated inside the cover portion 6520, a plurality of batteries may be provided. Further, the inside of the cover portion 6520 may have a charging control circuit or a wireless charging circuit for the second battery 6518b.
  • the cover part 6520 is partially fixed to the housing 6501 (6501a, 6501b), and the part overlapping the hinge part 6519 and the part overlapping the display part 6502b by bending and sliding are not fixed.
  • the cover part 6520 does not have to be fixed to the housing 6501 (6501a, 6501b), and may be detachable.
  • the electronic device 6500 can be used by removing the cover portion 6520 and using the first battery 6518a. Further, by charging the attached/detached second battery 6518b, the first battery 6518a can be replenished when the second battery 6518b is reconnected to the first battery 6518a. Therefore, the cover part 6520 can also be used as a mobile battery.
  • 16A and 16B show an example in which the display surface of the display portion 6502a is folded inward, but the present invention is not limited to this. It may also be possible to fold it into two.
  • the flexible battery of one embodiment of the present invention has high reliability against repeated deformation, and thus can be suitably used for such foldable (also called foldable) devices.
  • This embodiment can be implemented by appropriately combining at least part of it with other embodiments described herein.
  • FIG. 3 An example of mounting the battery 10 of one embodiment of the present invention in an electronic device will be described.
  • Examples of electronic devices that implement batteries include television devices (also called televisions or television receivers), monitors for computers, digital cameras, digital video cameras, digital photo frames, mobile phones (mobile phones, mobile phones (also referred to as a device), portable game machines, personal digital assistants, sound reproduction devices, and large game machines such as pachinko machines.
  • Portable information terminals include notebook personal computers, tablet terminals, electronic book terminals, mobile phones, and the like.
  • FIG. 17A shows an example of a mobile phone.
  • a mobile phone 2100 includes a display unit 2102 incorporated in a housing 2101, operation buttons 2103, an external connection port 2104, a speaker 2105, a microphone 2106, and the like. Note that the mobile phone 2100 has a battery 2107 . Since the battery 2107 is bendable, it can be mounted in a bendable region of the mobile phone 2100 .
  • the mobile phone 2100 can execute various applications such as mobile phone, e-mail, reading and creating text, playing music, Internet communication, and computer games.
  • the operation button 2103 can have various functions such as time setting, power on/off operation, wireless communication on/off operation, manner mode execution/cancellation, and power saving mode execution/cancellation.
  • the operating system installed in the mobile phone 2100 can freely set the functions of the operation buttons 2103 .
  • the mobile phone 2100 is capable of performing standardized short-range wireless communication. For example, by intercommunicating with a headset capable of wireless communication, hands-free communication is also possible.
  • the mobile phone 2100 has an external connection port 2104, and can directly exchange data with other information terminals via connectors. Also, charging can be performed via the external connection port 2104 . Note that the charging operation may be performed by wireless power supply without using the external connection port 2104 .
  • the mobile phone 2100 preferably has a sensor.
  • a sensor for example, a fingerprint sensor, a pulse sensor, a body sensor such as a body temperature sensor, a touch sensor, a pressure sensor, an acceleration sensor, or the like is preferably mounted.
  • Unmanned aerial vehicle 2300 having multiple rotors 2302.
  • FIG. Unmanned aerial vehicle 2300 may also be referred to as a drone.
  • Unmanned aerial vehicle 2300 has a battery 2301, a camera 2303, and an antenna (not shown), which is an aspect of the present invention.
  • Unmanned aerial vehicle 2300 can be remotely operated via an antenna.
  • the battery 2301 is bendable and can also be mounted on bend areas of the unmanned aerial vehicle 2300 .
  • FIG. 17C shows an example of a robot.
  • a robot 6400 shown in FIG. 17C includes a battery 6409, an illuminance sensor 6401, a microphone 6402, an upper camera 6403, a speaker 6404, a display unit 6405, a lower camera 6406, an obstacle sensor 6407, a moving mechanism 6408, an arithmetic device, and the like.
  • the battery 6409 is bendable and can also be mounted on bendable areas of the robot 6400 .
  • the microphone 6402 has a function of detecting the user's speech and environmental sounds. Also, the speaker 6404 has a function of emitting sound. Robot 6400 can communicate with a user using microphone 6402 and speaker 6404 .
  • the display unit 6405 has a function of displaying various information.
  • the robot 6400 can display information desired by the user on the display unit 6405 .
  • the display portion 6405 may include a touch panel. Further, the display unit 6405 may be a detachable information terminal, and by installing it at a fixed position of the robot 6400, charging and data transfer are possible.
  • the upper camera 6403 and the lower camera 6406 have the function of imaging the surroundings of the robot 6400.
  • the obstacle sensor 6407 can detect the presence or absence of an obstacle in the direction in which the robot 6400 moves forward using the movement mechanism 6408 .
  • the robot 6400 uses an upper camera 6403, a lower camera 6406, and an obstacle sensor 6407 to recognize the surrounding environment and can move safely.
  • a robot 6400 includes a battery 6409 according to one embodiment of the present invention and a semiconductor device or an electronic component in its internal region.
  • FIG. 17D shows an example of a cleaning robot.
  • the cleaning robot 6300 has a display unit 6302 arranged on the upper surface of a housing 6301, a plurality of cameras 6303 arranged on the side surfaces, a brush 6304, an operation button 6305, a battery 6306, various sensors, and the like.
  • the cleaning robot 6300 is equipped with tires, a suction port, and the like.
  • the cleaning robot 6300 can run by itself, detect dust 6310, and suck the dust from a suction port provided on the bottom surface.
  • the battery 6306 is bendable and can also be mounted in bendable areas of the cleaning robot 6300 .
  • the cleaning robot 6300 can analyze the image captured by the camera 6303 and determine the presence or absence of obstacles such as walls, furniture, or steps. Further, when an object such as wiring that is likely to get entangled in the brush 6304 is detected by image analysis, the rotation of the brush 6304 can be stopped.
  • the cleaning robot 6300 includes a battery 6306, which is one embodiment of the present invention, and a semiconductor device or an electronic component in its internal area.
  • FIG. 18A shows an example of a wearable device.
  • Wearable devices use flexible batteries as power sources.
  • wearable devices that can be charged not only by wires with exposed connectors but also by wireless charging are being developed. Desired.
  • the flexible battery that is one embodiment of the present invention can be mounted on a spectacles-type device 4000 as shown in FIG. 18A.
  • the glasses-type device 4000 has a frame 4000a and a display section 4000b.
  • the spectacles-type device 4000 that is lightweight, has a good weight balance, and can be used continuously for a long time can be obtained.
  • a flexible battery can be bent and can be mounted on a curved portion.
  • the headset device 4001 can be equipped with a battery that is one embodiment of the present invention.
  • the headset type device 4001 has at least a microphone section 4001a, a flexible pipe 4001b, and an earphone section 4001c.
  • a battery can be provided in the flexible pipe 4001b or in the earphone portion 4001c. The battery is bendable and can be mounted on curved sections.
  • the flexible battery which is one embodiment of the present invention can be mounted on the device 4002 that can be attached directly to the body.
  • a flexible battery 4002b can be provided within a thin housing 4002a of the device 4002. FIG.
  • a flexible battery can be bent and can be mounted on a curved portion.
  • the flexible battery that is one embodiment of the present invention can be mounted on the device 4003 that can be attached to clothes.
  • a flexible battery 4003b can be provided in a thin housing 4003a of the device 4003.
  • FIG. A flexible battery can be bent and can be mounted on a curved portion.
  • the belt-type device 4006 can be equipped with a flexible battery that is one embodiment of the present invention.
  • the belt-type device 4006 has a belt portion 4006a and a wireless power supply receiving portion 4006b, and a flexible battery can be mounted in the inner region of the belt portion 4006a.
  • a flexible battery can be bent and can be mounted on a curved portion.
  • the wristwatch-type device 4005 can be equipped with a flexible battery that is one embodiment of the present invention.
  • a wristwatch-type device 4005 has a display portion 4005a and a belt portion 4005b, and a flexible battery can be provided in the display portion 4005a or the belt portion 4005b.
  • a flexible battery can be bent and can be mounted on a curved portion.
  • the display unit 4005a can display not only the time but also various information such as incoming e-mails or phone calls.
  • the wristwatch-type device 4005 is a type of wearable device that is directly wrapped around the arm, it may be equipped with a sensor that measures the user's pulse, blood pressure, and the like. It is possible to accumulate data on the amount of exercise and health of the user and manage the health.
  • FIG. 18B shows a perspective view of the wristwatch-type device 4005 removed from the arm.
  • FIG. 18C shows how the flexible battery 913 is built in the inner region.
  • the flexible battery 913 is provided so as to overlap with the display portion 4005a, can have high density and high capacity, and is small and lightweight. Flexible battery 913 can be bent and can be mounted on a curved portion.
  • FIG. 18D shows an example of wireless earphones. Although a wireless earphone having a pair of main bodies 4100a and 4100b is illustrated here, they are not necessarily a pair.
  • the main bodies 4100a and 4100b have a driver unit 4101, an antenna 4102, and a flexible battery 4103.
  • a display portion 4104 may be provided.
  • Flexible battery 4103 can be bent and can be mounted on a curved portion.
  • the case 4110 has a flexible battery 4111. Moreover, it is preferable to have a board on which circuits such as a wireless IC and a charging control IC are mounted, and a charging terminal. Further, it may have a display portion, buttons, and the like. Flexible battery 4111 can be bent and can be mounted on a curved portion.
  • the main bodies 4100a and 4100b can wirelessly communicate with other electronic devices such as smartphones. As a result, sound data and the like sent from other electronic devices can be reproduced by the main bodies 4100a and 4100b. Also, if the main bodies 4100a and 4100b have microphones, the sound acquired by the microphones can be sent to another electronic device, and the sound data processed by the electronic device can be sent back to the main bodies 4100a and 4100b for reproduction. As a result, it can be used as a translator, for example.
  • the flexible battery 4103 of the main body 4100a can be charged from the flexible battery 4111 of the case 4110.
  • Flexible battery 4111 and flexible battery 4103 can be bent and can be mounted on a curved portion.
  • FIG. 19A to 19C show examples of spectacle-type devices different from the above.
  • FIG. 19A is a perspective view of an eyeglass-type device 5000.
  • FIG. 19C is a perspective view of an eyeglass-type device 5000.
  • the glasses-type device 5000 has a function as a so-called mobile information terminal, and can execute various programs and reproduce various contents by connecting to the Internet.
  • the glasses-type device 5000 has a function of displaying augmented reality content in AR mode.
  • the glasses-type device 5000 may also have a function of displaying virtual reality content in VR mode.
  • the glasses-type device 5000 may have a function of displaying content of alternative reality (SR) or mixed reality (MR).
  • SR alternative reality
  • MR mixed reality
  • a spectacles-type device 5000 has a housing 5001, an optical member 5004, a wearing tool 5005, a light shielding part 5007, and the like.
  • the housing 5001 preferably has a cylindrical shape.
  • the spectacles-type device 5000 has a configuration that can be worn on the user's head.
  • the housing 5001 of the spectacles-type device 5000 is worn on the user's head above the peripheral line of the head passing through the eyebrows and ears.
  • a housing 5001 is fixed to an optical member 5004 .
  • the optical member 5004 is fixed to the mounting fixture 5005 via the light shielding portion 5007 or via the housing 5001 .
  • the glasses-type device 5000 has a display device 5021, a reflector 5022, a flexible battery 5024, and a system section.
  • the display device 5021 , the reflector 5022 , the flexible battery 5024 , and the system section are each preferably provided inside the housing 5001 .
  • the system unit can include a control unit, a storage unit, a communication unit, a sensor, and the like, which the glasses-type device 5000 has. Further, it is preferable that the system section is provided with a charging circuit, a power supply circuit, and the like.
  • the flexible battery 5024 can be bent and can be mounted on curved sections.
  • FIG. 19B shows each part of the spectacles-type device 5000 in FIG. 19A.
  • FIG. 19B is a schematic diagram for explaining the details of each part of the spectacles-type device 5000 shown in FIG. 19A.
  • a flexible battery 5024, a system section 5026, and a system section 5027 are provided along the tube in a tube-shaped housing 5001.
  • FIG. A system unit 5025 is provided along the flexible battery 5024 and the like.
  • the housing 5001 preferably has a shape of a curved cylinder.
  • the flexible battery 5024 can be efficiently arranged in the housing 5001, the space in the housing 5001 can be efficiently used, and the flexible battery 5024 can be used. In some cases, the volume of battery 5024 can be increased.
  • the housing 5001 has, for example, a cylindrical shape, and has a shape such that the axis of the cylinder follows, for example, a part of an approximately elliptical shape.
  • the cross section of the tube is, for example, substantially elliptical.
  • the cross section of the tube has, for example, a part that is elliptical.
  • a portion having an elliptical cross-section is positioned on the side facing the head when the device is worn.
  • the cross section of the cylinder may have a portion that is partially polygonal (triangular, quadrangular, pentagonal, etc.).
  • the housing 5001 is curved along the user's forehead. Further, the housing 5001 is arranged, for example, along the forehead.
  • the housing 5001 may be configured by combining two or more cases. For example, a configuration in which an upper case and a lower case are combined can be used. Further, for example, it is possible to adopt a configuration in which an inner case (the side to be worn by the user) and an outer case are combined. Moreover, it is good also as a structure which combined three or more cases.
  • an electrode can be provided in the part that touches the forehead, and the electroencephalogram can be measured by the electrode.
  • an electrode may be provided in a portion that touches the forehead, and information such as sweat of the user may be measured by the electrode.
  • a plurality of flexible batteries 5024 may be arranged inside the housing 5001 .
  • the flexible battery 5024 is preferable because it can have a shape that follows a curved cylinder.
  • the flexible battery has flexibility, it is possible to increase the degree of freedom of arrangement inside the housing.
  • a flexible battery 5024, a system unit, and the like are arranged inside the cylindrical housing.
  • the system section is configured on, for example, a plurality of circuit boards.
  • a plurality of circuit boards and flexible batteries are connected using connectors, wiring, and the like. Since the flexible battery has flexibility, it can be arranged while avoiding connectors, wiring, and the like.
  • the flexible battery 5024 may be provided inside the mounting tool 5005 in addition to the inside of the housing 5001 .
  • 20A to 20C show examples of head-mounted devices.
  • 20A and 20B show a head-mounted device 5100 having a band-shaped fitting 5105, and the head-mounted device 5100 is connected via a cable 5120 to a terminal 5150 shown in FIG. 20C.
  • FIG. 20A shows a state in which the first portion 5102 is closed
  • FIG. 20B shows a state in which the first portion 5102 is opened.
  • the first portion 5102 has a shape that covers not only the front but also the sides of the face when closed. As a result, the field of view of the user can be shielded from external light, thereby enhancing the sense of realism and immersion. For example, depending on the content displayed, the user's sense of fear can be heightened.
  • a wearing tool 5105 has a band-like shape. As a result, it is less likely to shift compared to the configuration shown in FIG. 20A, etc., and is suitable for enjoying content with a relatively large amount of exercise, such as attractions.
  • a flexible battery 5107 or the like may be built in the occipital region of the wearing tool 5105 .
  • the center of gravity of the head-mounted device 5100 can be adjusted, and the feeling of wearing can be improved. can.
  • a flexible battery 5108 having flexibility may be arranged inside the wearing tool 5105 having a band-like shape.
  • the example shown in FIG. 20A shows an example in which two flexible batteries 5108 are arranged inside the wearing tool 5105 .
  • a flexible battery having flexibility it is possible to form a shape along a curved band shape, which is preferable.
  • the wearing tool 5105 also has a portion 5106 that covers the user's forehead or forehead. By having the portion 5106, it is possible to make it more difficult to shift.
  • electrodes can be provided in the portion 5106 or the portion of the housing 5101 that touches the forehead, and electroencephalograms can be measured using the electrodes.
  • FIG. 21C shows a block diagram of a vehicle with a motor.
  • the electric vehicle is provided with first batteries 1301a and 1301b as secondary batteries for main driving, and a second battery 1311 that supplies power to an inverter 1312 that starts the motor 1304 .
  • the second battery 1311 is also called cranking battery or starter battery.
  • the second battery 1311 only needs to have a high output and does not need a large capacity so much, and the capacity of the second battery 1311 is smaller than that of the first batteries 1301a and 1301b.
  • one or both of the first batteries 1301a and 1301b can be a secondary battery manufactured using the method for manufacturing a secondary battery according to one embodiment of the present invention.
  • first batteries 1301a and 1301b are connected in parallel
  • three or more batteries may be connected in parallel.
  • the first battery 1301a can store sufficient electric power
  • the first battery 1301b may be omitted.
  • a large amount of electric power can be extracted by forming a battery pack including a plurality of secondary batteries.
  • a plurality of secondary batteries may be connected in parallel, may be connected in series, or may be connected in series after being connected in parallel.
  • a plurality of secondary batteries is also called an assembled battery.
  • a secondary battery for vehicle has a service plug or a circuit breaker that can cut off high voltage without using a tool in order to cut off power from a plurality of secondary batteries.
  • the power of the first batteries 1301a and 1301b is mainly used to rotate the motor 1304, but it is also used to power 42V (high voltage) vehicle components (electric power steering 1307, heater 1308) via a DCDC circuit 1306. , defogger 1309).
  • the first battery 1301a is also used to rotate the rear motor 1317 when the rear wheel has the rear motor 1317 .
  • the second battery 1311 supplies power to 14V system (low voltage system) in-vehicle components (audio 1313, power window 1314, lamps 1315, etc.) via the DCDC circuit 1310.
  • 14V system low voltage system
  • in-vehicle components audio 1313, power window 1314, lamps 1315, etc.
  • the internal structure of the first battery 1301a may be the stacked type shown in FIG. 1 and the like, or the wound type shown in FIG. 9 and the like.
  • FIG. 21A shows an example in which nine prismatic secondary batteries 1300 are used as one battery pack 1415 . Also, nine square secondary batteries 1300 are connected in series, one electrode is fixed by a fixing portion 1413 made of an insulator, and the other electrode is fixed by a fixing portion 1414 made of an insulator. In this embodiment mode, an example of fixing by fixing portions 1413 and 1414 is shown; Since it is assumed that the vehicle is subject to vibration or shaking from the outside (road surface, etc.), it is preferable to fix a plurality of secondary batteries using fixing portions 1413 and 1414, a battery housing box, or the like.
  • One electrode is electrically connected to the control circuit portion 1320 through a wiring 1421 .
  • the other electrode is electrically connected to the control circuit section 1320 by wiring 1422 .
  • control circuit portion 1320 may use a memory circuit including a transistor using an oxide semiconductor.
  • a charge control circuit or a battery control system including a memory circuit including a transistor using an oxide semiconductor is sometimes called a BTOS (battery operating system or battery oxide semiconductor).
  • the control circuit unit 1320 detects the terminal voltage of the secondary battery and manages the charging/discharging state of the secondary battery. For example, both the output transistor of the charging circuit and the cut-off switch can be turned off almost simultaneously to prevent overcharging.
  • FIG. 21B An example of a block diagram of the battery pack 1415 shown in FIG. 21A is shown in FIG. 21B.
  • the control circuit unit 1320 includes a switch unit 1324 including at least a switch for preventing overcharge and a switch for preventing overdischarge, a control circuit 1322 for controlling the switch unit 1324, and a voltage measurement unit for the first battery 1301a. and have The control circuit unit 1320 sets the upper limit voltage and the lower limit voltage of the secondary battery to be used, and limits the upper limit of the current from the outside or the upper limit of the output current to the outside. The range from the lower limit voltage to the upper limit voltage of the secondary battery is within the voltage range recommended for use.
  • the control circuit unit 1320 controls the switch unit 1324 to prevent over-discharging or over-charging, it can also be called a protection circuit.
  • control circuit 1322 detects a voltage that is likely to cause overcharging
  • the switch of the switch section 1324 is turned off to cut off the current.
  • a PTC element may be provided in the charging/discharging path to provide a function of interrupting the current according to the temperature rise.
  • the control circuit section 1320 also has an external terminal 1325 (+IN) and an external terminal 1326 (-IN).
  • the switch section 1324 can be configured by combining one or both of an n-channel transistor and a p-channel transistor.
  • the switch unit 1324 is not limited to a switch having a Si transistor using single crystal silicon. indium), SiC (silicon carbide), ZnSe (zinc selenide), GaN (gallium nitride), GaOx (gallium oxide; x is a real number greater than 0), or the like.
  • a memory element using an OS transistor can be freely arranged by stacking it on a circuit using a Si transistor or the like, integration can be easily performed.
  • an OS transistor can be manufactured using a manufacturing apparatus similar to that of a Si transistor, it can be manufactured at low cost. That is, the control circuit portion 1320 using an OS transistor can be stacked on the switch portion 1324 and integrated into one chip. Since the volume occupied by the control circuit section 1320 can be reduced, miniaturization is possible.
  • the first batteries 1301a and 1301b mainly supply power to 42V system (high voltage system) in-vehicle equipment, and the second battery 1311 supplies power to 14V system (low voltage system) in-vehicle equipment.
  • a lead-acid battery is often adopted as the second battery 1311 because of its cost advantage.
  • the second battery 1311 may use a lead-acid battery, an all-solid battery, or an electric double layer capacitor.
  • regenerated energy from the rotation of the tire 1316 is sent to the motor 1304 via the gear 1305 and charged to the second battery 1311 via the control circuit section 1321 from the motor controller 1303 or the battery controller 1302 .
  • the battery controller 1302 charges the first battery 1301 a through the control circuit unit 1320 .
  • the battery controller 1302 charges the first battery 1301b through the control circuit unit 1320 . In order to efficiently charge the regenerated energy, it is desirable that the first batteries 1301a and 1301b be capable of rapid charging.
  • the battery controller 1302 can set the charging voltage and charging current of the first batteries 1301a and 1301b.
  • the battery controller 1302 can set charging conditions according to the charging characteristics of the secondary battery to be used and perform rapid charging.
  • the outlet of the charger or the connection cable of the charger is electrically connected to the battery controller 1302 .
  • Electric power supplied from an external charger charges the first batteries 1301 a and 1301 b via the battery controller 1302 .
  • Some chargers are provided with a control circuit and do not use the function of the battery controller 1302, but the first batteries 1301a and 1301b are charged via the control circuit unit 1320 to prevent overcharging. is preferred.
  • the connection cable or the connection cable of the charger is provided with the control circuit.
  • the control circuit section 1320 is sometimes called an ECU (Electronic Control Unit).
  • the ECU is connected to a CAN (Controller Area Network) provided in the electric vehicle.
  • CAN is one of serial communication standards used as an in-vehicle LAN.
  • the ECU includes a microcomputer.
  • the ECU uses a CPU or a GPU.
  • a next-generation clean energy vehicle such as a hybrid vehicle (HV), an electric vehicle (EV), or a plug-in hybrid vehicle (PHV)
  • HV hybrid vehicle
  • EV electric vehicle
  • PHS plug-in hybrid vehicle
  • agricultural machinery such as electric tractors, motorized bicycles including electric assisted bicycles, motorcycles, electric wheelchairs, electric carts, small or large ships, submarines, aircraft such as fixed or rotary wing aircraft, rockets, artificial satellites
  • a secondary battery can also be mounted on a transportation vehicle such as a space probe, a planetary probe, or a spacecraft.
  • a vehicle 3001 shown in FIG. 22A is an electric vehicle that uses an electric motor as a power source for running. Alternatively, it is a hybrid vehicle in which an electric motor and an engine can be appropriately selected and used as power sources for running. When a secondary battery is installed in a vehicle, the secondary battery is installed at one or more locations.
  • the automobile 3001 shown in FIG. 22A has the battery pack 1415 shown in FIG. 21A.
  • Battery pack 1415 has a secondary battery module. It is preferable that the battery pack 1415 further includes a charging control device electrically connected to the secondary battery module.
  • a secondary battery module has a single or a plurality of secondary batteries.
  • the vehicle 3001 can be charged by receiving power from an external charging facility by a plug-in system or a contactless power supply system to the secondary battery of the vehicle 3001 .
  • the charging method or the standard of the connector may be appropriately performed by a predetermined method such as CHAdeMO (registered trademark) or Combo.
  • the charging device may be a charging station provided in a commercial facility, or may be a household power source.
  • plug-in technology can charge a secondary battery mounted on the automobile 3001 with power supplied from the outside. Charging can be performed by converting AC power into DC power via a conversion device such as an ACDC converter.
  • a power receiving device can be mounted on a vehicle, and power can be supplied from a power transmission device on the ground in a contactless manner for charging.
  • this non-contact power supply system it is possible to charge the vehicle not only while the vehicle is stopped but also while the vehicle is running by installing a power transmission device on the road or the outer wall.
  • power may be transmitted and received between two vehicles.
  • a solar panel may be provided on the exterior of the vehicle to charge the secondary battery while the vehicle is stopped or running. An electromagnetic induction method or a magnetic resonance method can be used for such contactless power supply. Solar panels are sometimes called solar modules.
  • FIG. 22B shows a large transport vehicle 3002 with electrically controlled motors as an example of a transport vehicle.
  • the secondary battery module of the transportation vehicle 3002 has a maximum voltage of 170 V, which is formed by connecting 48 cells in series with four secondary batteries each having a voltage of, for example, 3.5 V or more and 4.7 V or less. Except for the number of secondary batteries forming the secondary battery module of the battery pack 3201, the function is the same as that of FIG. 22A, so the description is omitted.
  • FIG. 22C shows, as an example, a large transport vehicle 3003 with electrically controlled motors.
  • the secondary battery module of the transportation vehicle 3003 has a maximum voltage of 600 V, for example, a hundred or more secondary batteries of 3.5 V or more and 4.7 V or less connected in series. Therefore, a secondary battery with small variations in characteristics is required.
  • a secondary battery having stable battery characteristics can be manufactured, and mass production is possible at low cost in terms of yield. 22A except that the number of secondary batteries constituting the secondary battery module of the battery pack 3202 is different, description thereof is omitted.
  • FIG. 22D shows an aircraft 3004 having an engine that burns fuel as an example. Since the aircraft 3004 shown in FIG. 22D has wheels for takeoff and landing, it can be said to be a type of transportation vehicle, and a secondary battery module is configured by connecting a plurality of secondary batteries, and the secondary battery module and charging control are performed. and a battery pack 3203 containing a device.
  • the secondary battery module of aircraft 3004 has a maximum voltage of 32V, for example, eight 4V secondary batteries connected in series. Except for the number of secondary batteries forming the secondary battery module of the battery pack 3203, the function is the same as that of FIG. 22A, so the description is omitted.
  • FIG. 22E shows a transport vehicle 3005 that transports freight as an example. It has a motor controlled by electricity, and performs various operations by supplying power from a secondary battery that constitutes a secondary battery module of the battery pack 3204 . Further, the transportation vehicle 3005 is not limited to being operated by a human as a driver, and can be operated unmanned by CAN communication or the like. Although FIG. 22E shows a forklift, the present invention is not particularly limited, and can be applied to industrial machines that can be operated by CAN communication, such as automatic transporters, work robots, or small construction machines. A battery pack having a secondary battery can be mounted.
  • FIG. 23A illustrates an example of an electric bicycle using the secondary battery of one embodiment of the present invention.
  • the secondary battery of one embodiment of the present invention can be applied to the electric bicycle 3100 illustrated in FIG. 23A.
  • a power storage device 3102 illustrated in FIG. 23B includes, for example, a plurality of secondary batteries and a protection circuit.
  • the electric bicycle 3100 has a power storage device 3102 .
  • the power storage device 3102 can supply electricity to a motor that assists the driver.
  • the power storage device 3102 is portable, and is shown removed from the bicycle in FIG. 23B.
  • the power storage device 3102 includes a plurality of secondary batteries 3101 of one embodiment of the present invention, and the remaining battery level and the like can be displayed on the display portion 3103 .
  • the power storage device 3102 also includes a control circuit 3104 capable of controlling charging of the secondary battery or detecting an abnormality, which is an example of one embodiment of the present invention.
  • the control circuit 3104 is electrically connected to the positive and negative electrodes of the secondary battery 3101 .
  • a small solid secondary battery may be provided in the control circuit 3104 .
  • control circuit 3104 By providing a small solid secondary battery in the control circuit 3104, power can be supplied to hold data in the memory circuit included in the control circuit 3104 for a long time. In addition, a synergistic effect of safety can be obtained by combining with the secondary battery of one embodiment of the present invention.
  • the secondary battery and the control circuit 3104 according to one embodiment of the present invention can greatly contribute to eliminating accidents such as fire caused by the secondary battery.
  • FIG. 23C illustrates an example of a motorcycle using the secondary battery of one embodiment of the present invention.
  • the power storage device 3302 can supply electricity to the turn signal lights 3303 .
  • the power storage device 3302 in which a plurality of secondary batteries according to one embodiment of the present invention are housed can have high capacity, which can contribute to size reduction.
  • a protection circuit that prevents overcharging and/or overdischarging of the secondary battery may be electrically connected to the secondary battery.
  • the power storage device 3302 can be stored in the storage 3304 under the seat.
  • the power storage device 3302 can be stored in the under-seat storage 3304 even if the under-seat storage 3304 is small.
  • the house illustrated in FIG. 24A includes a power storage device 2612 including a secondary battery with stable battery characteristics and a solar panel 2610 by using a method for manufacturing a secondary battery according to one embodiment of the present invention.
  • the power storage device 2612 is electrically connected to the solar panel 2610 through a wiring 2611 or the like. Alternatively, the power storage device 2612 and the ground-mounted charging device 2604 may be electrically connected.
  • a power storage device 2612 can be charged with power obtained from the solar panel 2610 . Electric power stored in power storage device 2612 can be used to charge a secondary battery of vehicle 2603 via charging device 2604 .
  • Power storage device 2612 is preferably installed in the underfloor space. By installing in the space under the floor, the space above the floor can be effectively used. Alternatively, power storage device 2612 may be installed on the floor.
  • the power stored in the power storage device 2612 can also be supplied to other electronic devices in the house. Therefore, the use of the power storage device 2612 as an uninterruptible power supply makes it possible to use the electronic device even when power cannot be supplied from a commercial power supply due to a power failure or the like.
  • FIG. 24B illustrates an example of a power storage device according to one embodiment of the present invention. As shown in FIG. 24B, in an underfloor space 796 of a building 799, a large power storage device 791 obtained by a method for manufacturing a secondary battery according to one embodiment of the present invention is installed.
  • a control device 790 is installed in the power storage device 791, and the control device 790 is connected to the distribution board 703, the power storage controller 705 (also referred to as a control device), the display 706, and the router 709 by wiring. electrically connected.
  • Electric power is sent from the commercial power source 701 to the distribution board 703 via the service wire attachment portion 710 . Electric power is sent to the distribution board 703 from the power storage device 791 and the commercial power supply 701, and the distribution board 703 distributes the sent power to the general load via an outlet (not shown). 707 and power storage system load 708 .
  • a general load 707 is, for example, an electrical device such as a television or a personal computer
  • a power storage system load 708 is, for example, an electrical device such as a microwave oven, refrigerator, or air conditioner.
  • the power storage controller 705 has a measurement unit 711, a prediction unit 712, and a planning unit 713.
  • the measuring unit 711 has a function of measuring the amount of electric power consumed by the general load 707 and the power storage system load 708 during a day (for example, from 00:00 to 24:00).
  • the measurement unit 711 may also have a function of measuring the amount of power in the power storage device 791 and the amount of power supplied from the commercial power source 701 .
  • the prediction unit 712 predicts the demand to be consumed by the general load 707 and the storage system load 708 during the next day based on the amount of power consumed by the general load 707 and the storage system load 708 during the day. It has a function of predicting power consumption.
  • the planning unit 713 also has a function of planning charging and discharging of the power storage device 791 based on the amount of power demand predicted by the prediction unit 712 .
  • the amount of power consumed by the general load 707 and the power storage system load 708 measured by the measurement unit 711 can be confirmed by the display 706 . Also, it can be checked on an electric device such as a television or a personal computer via the router 709 . In addition, it can be confirmed by a mobile electronic terminal such as a smart phone or a tablet via the router 709 . In addition, it is possible to check the amount of power demand for each time period (or for each hour) predicted by the prediction unit 712 by using the display 706, the electric device, and the portable electronic terminal.
  • FIG. 25A shows a satellite 6800 as an example of space equipment.
  • a satellite 6800 has a body 6801 , a solar panel 6802 , an antenna 6803 and a secondary battery 6805 .
  • Solar panels are sometimes called solar modules.
  • a secondary battery 6805 may be provided in the satellite 6800 so that the satellite 6800 can operate even when the generated power is low.
  • the artificial satellite 6800 can generate a signal.
  • the signal is transmitted via antenna 6803 and can be received by, for example, a receiver located on the ground or other satellite.
  • a receiver located on the ground or other satellite.
  • the position of the receiver that received the signal can be determined.
  • artificial satellite 6800 can constitute, for example, a satellite positioning system.
  • the artificial satellite 6800 can be configured to have a sensor.
  • artificial satellite 6800 can have a function of detecting sunlight that hits and is reflected by an object provided on the ground.
  • the artificial satellite 6800 can have a function of detecting thermal infrared rays emitted from the earth's surface by adopting a configuration having a thermal infrared sensor.
  • artificial satellite 6800 can function as an earth observation satellite, for example.
  • FIG. 25B shows a probe 6900 having a solar sail (also called a solar sail) as an example of space equipment.
  • the spacecraft 6900 has a fuselage 6901 , a solar sail 6902 and a secondary battery 6905 .
  • solar sail 6902 When photons emitted from the sun hit the surface of solar sail 6902 , momentum is transferred to solar sail 6902 . Therefore, the surface of the solar sail 6902 should have a highly reflective thin film and preferably face the direction of the sun.
  • the solar sail 6902 is in a small folded state until it goes out of the atmosphere, and in the outer atmosphere of the earth (outer space), it is expanded into a large sheet of thin film as shown in FIG. 25B. Therefore, it is preferable to use the bendable secondary battery of one embodiment of the present invention as the secondary battery 6905 mounted on the solar sail 6902 .
  • Fig. 25C shows a spacecraft 6910 as an example of space equipment.
  • Spacecraft 6910 has fuselage 6911 , solar panels 6912 and secondary battery 6913 .
  • the secondary battery 6913 the secondary battery of one embodiment of the present invention can be used.
  • Airframe 6911 may, for example, have pressurized and unpressurized chambers. The pressurized chamber may be designed so that a passenger can get in. Electric power generated when the solar panel 6912 is irradiated with sunlight can charge the secondary battery 6913 .
  • the solar panel 6912 and the secondary battery 6913 may each have flexibility.
  • a flexible solar panel 6912 is preferable because the solar panel 6912 can be provided in a curved shape on the outer surface of the fuselage 6911 .
  • the use of a flexible secondary battery 6913 is preferable because the secondary battery 6913 can be provided in a curved shape inside the solar panel 6912 (inside the body 6911).
  • the flexible secondary battery 6913 the flexible battery 10E described with reference to FIG. 11 and the like can be used.
  • FIG. 25D shows a rover 6920 as an example of space equipment.
  • the probe 6920 has a fuselage 6921 and a secondary battery 6923 .
  • the rover 6920 may have solar panels 6922 .
  • the secondary battery 6923 the secondary battery of one embodiment of the present invention can be used.
  • the rover 6920 may be designed to allow crew members to board. Electric power generated by irradiating the solar panel 6912 with sunlight may be charged in the secondary battery 6923, or electric power generated by other power sources such as a fuel cell, a radioactive isotope thermoelectric converter, and the like may be used.
  • the secondary battery 6923 may be charged. Note that the solar panel 6922 and the secondary battery 6923 may each have flexibility.
  • a flexible solar panel 6922 is preferable because the solar panel 6922 can be provided in a curved shape on the outer surface of the fuselage 6921 .
  • the secondary battery 6923 can be provided in a curved shape inside the solar panel 6922 (inside the body 6921), which is preferable.
  • the flexible secondary battery 6923 the flexible battery 10E described with reference to FIG. 11 and the like can be used.

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  • Battery Electrode And Active Subsutance (AREA)
PCT/IB2022/061680 2021-12-17 2022-12-02 電池 Ceased WO2023111755A1 (ja)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11274004A (ja) * 1998-03-23 1999-10-08 Asahi Glass Co Ltd 電気化学素子
JP2011096620A (ja) * 2009-11-02 2011-05-12 Samsung Sdi Co Ltd 二次電池、その製造方法及び切断金型
US20160197335A1 (en) * 2015-01-07 2016-07-07 Samsung Sdi Co., Ltd. Secondary battery
JP2017059442A (ja) * 2015-09-17 2017-03-23 積水化学工業株式会社 リチウムイオン二次電池及びその製造方法
JP2019040720A (ja) * 2017-08-24 2019-03-14 株式会社村田製作所 蓄電デバイス及びその製造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102356496B (zh) 2010-05-21 2014-07-23 丰田自动车株式会社 二次电池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11274004A (ja) * 1998-03-23 1999-10-08 Asahi Glass Co Ltd 電気化学素子
JP2011096620A (ja) * 2009-11-02 2011-05-12 Samsung Sdi Co Ltd 二次電池、その製造方法及び切断金型
US20160197335A1 (en) * 2015-01-07 2016-07-07 Samsung Sdi Co., Ltd. Secondary battery
JP2017059442A (ja) * 2015-09-17 2017-03-23 積水化学工業株式会社 リチウムイオン二次電池及びその製造方法
JP2019040720A (ja) * 2017-08-24 2019-03-14 株式会社村田製作所 蓄電デバイス及びその製造方法

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