WO2015087388A1 - 二次電池及びその製造方法 - Google Patents
二次電池及びその製造方法 Download PDFInfo
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- WO2015087388A1 WO2015087388A1 PCT/JP2013/083063 JP2013083063W WO2015087388A1 WO 2015087388 A1 WO2015087388 A1 WO 2015087388A1 JP 2013083063 W JP2013083063 W JP 2013083063W WO 2015087388 A1 WO2015087388 A1 WO 2015087388A1
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- layer
- oxide semiconductor
- electrode
- secondary battery
- semiconductor layer
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
-
- 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
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
-
- 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
- H01M10/0436—Small-sized flat cells or batteries for portable equipment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/30—Nickel accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N99/00—Subject matter not provided for in other groups of this subclass
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a secondary battery and a manufacturing method thereof, for example, a secondary battery based on an operation principle of capturing a new energy level in a band cap by using a photoexcitation structure change of a metal oxide to capture electrons. (Hereinafter also referred to as “quantum battery”).
- Ni-MH nickel metal hydride battery
- LIB lithium ion secondary battery
- unit cells a plurality of units that function as a secondary battery independently are stacked.
- Non-Patent Document 1 pages 319 to 320 describe the structures of cylindrical and prismatic nickel metal hydride batteries (Ni-MH) as shown in FIGS.
- Cylindrical battery 1A has a thin plate-like positive electrode 2 and negative electrode 3 of a predetermined shape wound in a spiral shape via a separator 4 (the spiral can be seen as a stack of unit cells) and inserted into a cylindrical case 5 Then, after injecting the electrolyte, the battery is sealed to complete the battery.
- a prismatic battery 1B has a structure in which a separator 4 is stacked between a thin plate-like positive electrode 2 and a negative electrode 3 having a predetermined shape, and is inserted into a rectangular case 5 and sealed after injecting an electrolytic solution to complete a battery. ing.
- Patent Document 1 describes the internal structure (electrode group) of a rectangular lithium ion secondary battery as shown in FIG.
- the electrode plate group 1C is described in which the positive electrode plate 2 and the negative electrode plate 3 are alternately inserted into valley grooves of a continuous body of the separator 4 bent in a zigzag, and pressed flat in a zigzag direction.
- Such an electrode plate group is inserted into a rectangular outer can and sealed after an electrolytic solution is injected to complete a rectangular battery.
- FIG. 4 shows a perspective view and a cross-sectional view showing the configuration of the all solid state secondary battery.
- terminal members such as a positive electrode terminal and a negative electrode terminal
- mounting members such as an exterior member and a covering member are omitted.
- the all-solid-state secondary battery 1 ⁇ / b> D includes a solid layer (hereinafter referred to as a power storage layer) 6 that causes an internal change between the negative electrode layer 3 and the positive electrode layer 2 during charge and discharge.
- Examples of the all-solid-type secondary battery 1D include the above-described quantum battery and an all-solid-type lithium ion secondary battery.
- a quantum battery a layer that accumulates (captures) electrons in a charging operation and discharges electrons accumulated in a discharging operation between the negative electrode layer 3 and the positive electrode layer 2 (this layer is referred to as a charging layer as will be described later). ), And this charge layer corresponds to the electricity storage layer 6.
- a solid electrolyte layer is provided between the negative electrode layer 3 and the positive electrode layer 2, and this solid electrolyte layer corresponds to the power storage layer 6.
- the negative electrode layer 3 and the positive electrode layer 2 are insulated around the power storage layer 6 or the like, or the periphery of the power storage layer 6 is protected. It is preferable to provide the seal 7 (however, the seal 7 is not an essential component).
- the all-solid-state secondary battery 1D can also increase the terminal voltage by stacking unit cells in series, and can increase the energy density by stacking unit cells in parallel.
- FIG. 5 is a cross-sectional view showing an easily conceivable secondary battery 1E in which the secondary battery 1D is a unit cell and a plurality of unit cells are connected in parallel.
- Each unit cell (1D) in the secondary battery 1E is sandwiched between the negative electrode terminal plate 8 and the positive electrode terminal plate 9, and the positive electrode terminal plate 9 related to a certain unit cell and the negative electrode terminal plate related to the upper unit cell.
- Insulating layer 10 is provided between 8 and 8.
- the plurality of negative electrode terminal plates 8 are connected by a negative electrode terminal connecting portion 8b, the plurality of positive electrode terminal plates 9 are connected by a positive electrode terminal connecting portion 9b, and the negative electrode terminal connecting portion 8b and the positive electrode terminal connecting portion 9b are respectively Extension portions 8a and 9a for exposing the negative electrode terminal and the positive electrode terminal are provided outside a mounting member (not shown).
- the terminal voltage of the secondary battery 1D is Vo and the energy density is Io
- the number of stacked secondary batteries 1D (the number of parallel connections) is N
- the terminal voltage Vo of the secondary battery 1E is N ⁇ Io. (For example, if the number of stacked layers is 6, 6 ⁇ Io).
- the energy density of the secondary battery can be increased by connecting a plurality of unit cells in parallel.
- an insulating layer 10 must be provided between the negative electrode terminal plate 8 and the positive electrode terminal plate 9 of adjacent unit cells, and the unit cell As many negative electrode terminals 8 as the number of negative electrode layers 3 must be provided, and as many positive electrode terminals 9 as the number of positive electrode layers 2 of the unit cell must be provided, which increases the volume of the secondary battery 1E.
- the volumetric efficiency of a battery is determined by the ratio of the effective volume of the battery to the total volume of the battery. Considering the charging cycle of the secondary battery, it is required to increase the energy density of the secondary battery, but it is preferable that the total volume of the battery is small even if the energy density is increased. Moreover, if the total volume of the battery is reduced, the secondary battery can be reduced in size.
- the negative electrode terminal plate 8 and the positive electrode terminal plate 9 are necessary for the configuration of the battery, but the insulating layer 10 does not contribute directly to charging, and thus is an obstacle to improving the energy density.
- the number of stacked unit cells connected in parallel may be increased.
- the number of insulating layers 10 also increases (the number of negative electrode terminal plates 8 and positive electrode terminal plates 9 also increases), and the total volume is further increased.
- the secondary battery of the first aspect of the present invention includes: (1) a sheet-like first electrode-use base material that exhibits a function as a first electrode and a function as a base material; ) A surface-side electricity storage layer provided on the surface side of the first electrode-use base material; (3) a surface-side second electrode layer laminated on the surface-side electricity storage layer; and (4) the first electrode-use base. It is provided with the back surface electrical storage layer provided in the back surface side of the material, and (5) the back surface side 2nd electrode layer laminated
- the method for producing a secondary battery according to the second aspect of the present invention includes (1) a first electrode on the front side and the back side of a sheet-like first electrode and base material that functions as a first electrode and a base material.
- a step of laminating one oxide semiconductor layer (2) a step of laminating a surface-side charging layer on the first oxide semiconductor layer on the front surface side, and (3) a back surface on the first oxide semiconductor layer on the back surface side.
- a step of laminating a layer, and (6) a step of laminating a second oxide semiconductor layer and a second electrode layer on the back-side charging layer.
- the manufacturing method of the secondary battery according to the third aspect of the present invention is (1) continuous from the front surface to the back surface of the sheet-like first electrode-use base material that exhibits the function as the first electrode and the function as the base material.
- a step of laminating a first oxide semiconductor layer (2) a step of laminating a charging layer so as to cover part or all of the first oxide semiconductor layer, and (3) irradiating the charging layer with ultraviolet rays.
- one first electrode layer also serves as the first electrode layer of two unit cells formed on the opposite sides to each other, While maintaining the strength as a base material, it contributes to the improvement of energy density in that the thickness of the first electrode layer can be effectively halved. Moreover, since two unit cells can be formed by manufacturing the first electrode layer (first electrode combined base material) once, the manufacturing process can be reduced.
- first electrode layer first electrode combined substrate
- first electrode layer second electrode layer of two unit cells formed on the opposite sides of the first electrode layer
- connection process between the first electrode layers can be omitted, and this also has an effect of preventing oxidation of the stacked portion due to heat treatment in the process.
- FIG. 5 is a perspective view showing a partially broken internal structure of a conventional cylindrical nickel-metal hydride battery (Ni-MH).
- FIG. 6 is a perspective view showing a partially broken internal structure of a conventional prismatic nickel metal hydride battery (Ni-MH). 6 is a perspective view showing an internal structure (electrode plate group) of a square lithium ion secondary battery described in Patent Document 1.
- FIG. The perspective view and sectional drawing which show the structure of the all-solid-type secondary battery are shown. It is sectional drawing which shows the structure of the considered secondary battery which made the all-solid-type secondary battery the unit cell, and connected the several unit cell in parallel. It is sectional drawing which shows the structure of the secondary battery of 1st Embodiment.
- the secondary battery of the first embodiment is a quantum battery.
- FIG. 6 is a cross-sectional view showing the configuration of the secondary battery 20 according to the first embodiment, which is the same as FIG. 4B described above. It is sectional drawing seen from the various directions.
- FIG. 6 shows the dimension in the thickness direction with emphasis on the dimension in the plane direction.
- the secondary battery 20 of the first embodiment includes a sheet-like negative electrode substrate 21, a surface-side n-type metal oxide semiconductor layer 22 ⁇ / b> F, a surface-side charging layer 23 ⁇ / b> F, and a surface-side p-type metal oxide.
- the substrate end face insulating portion 26 is provided.
- a unit secondary battery (unit cell) is configured, and the sheet-like negative electrode serving base material 21, the back side n-type metal oxide semiconductor layer 22 ⁇ / b> R, the back side charge layer 23 ⁇ / b> R, and the back side p-type metal oxide semiconductor layer 24 ⁇ / b> R.
- the back side positive electrode layer 25R constitutes a back side unit secondary battery (unit cell).
- the secondary battery 20 is characterized in that unit cells are formed on both surfaces of the base material, and any surface of both surfaces cannot be referred to as a surface.
- the upper surface in FIG. 6 is referred to as the front surface, and the lower surface in FIG. 6 is referred to as the back surface.
- the secondary battery 20 is a substantially rectangular sheet having a large difference between the short side and the long side (see FIG. 7 described later).
- the left-right direction in FIG. 6 is referred to as the width direction, and the normal direction to the paper surface of FIG.
- the sheet-like negative electrode combined base material 21 functions as a sheet-like base material during the thin film formation process and also functions as a negative electrode body.
- FIG. 4 showing the above-described conventional secondary battery (quantum battery) 1D shows the secondary battery removed from the base material after being obtained through various thin film forming processes on the base material.
- the secondary battery 20 of the first embodiment includes two units in which one negative electrode layer (sheet-like negative electrode substrate 21) is plane-symmetric with respect to it. It also serves as the negative electrode layer of the cell.
- the sheet-like negative electrode serving base material 21 is an oxide semiconductor layer 22F, 22R, charging layer 23F, 23R, p-type.
- the metal oxide semiconductor layers 24F and 24R and the positive electrode layers 25F and 25R are not covered and function as a lead-out portion for the negative electrode.
- the sheet-like negative electrode combined substrate 21 may be formed of one type of conductive material, and is formed by attaching a conductive thin film to the surface of a conductor or an insulator by sputtering or plating. It may be what is being done.
- a stainless steel sheet SUS sheet
- SUS sheet can be applied as the sheet-like negative electrode combined base material 21.
- the charge layers 23F and 23R on each surface are layers that store electrons in a charging operation, release stored electrons in a discharging operation, and hold (store) electrons in a state where charging and discharging are not performed.
- a trap level may be formed in the band gap in the charging layer based on the photoexcitation structure change. .
- a charged layer in which a semiconductor having a band gap of a predetermined value or more and having a light-transmitting metal oxide insulatively coated with a fine particle is formed into a layer, and irradiated with ultraviolet rays to form a charged layer.
- n-type metal oxide semiconductor layers 22F and 22R on each surface have a function as an energy barrier in the charge layers 23F and 23R, like the insulating layers around the metal oxide, and the metal oxide is insulated for some reason. It can be prevented that a portion without an energy barrier is formed by directly contacting the negative electrode without passing through a layer.
- n-type metal oxide semiconductor layer 22F but not the material is limited to constitute the 22R, for example, can be applied titanium dioxide (TiO 2).
- the n-type metal oxide semiconductor layers 22F and 22R are formed of a negative electrode. It can be seen as an element.
- the positive electrode layers 25F and 25R on each surface may be formed as a conductive layer.
- the material of the positive electrode layers 25F and 25R is not limited, but for example, aluminum (Al) can be applied.
- Al aluminum
- the p-type metal oxide semiconductor layers 24F and 24R are in contact with the charging layers 23F and 23R. Have.
- the material of the p-type metal oxide semiconductor layers 24F and 24R is not limited, for example, nickel oxide (NiO) can be applied.
- the substrate end face insulating portion 26 is one of the sheet-like negative electrode serving substrate 21 that is not provided with the charging layers 23F and 23R between the sheet-like negative electrode serving substrate 21 functioning as a negative electrode and the positive electrode layers 25F and 25R. This is provided in order to prevent a short circuit at the end portion.
- the material of the substrate end face insulating portion 26 is not limited, but, for example, a rubber material, a polyolefin material, a fluororesin, or the like can be used, and alumina (Al 2 O 3 ) or silica (SiO 2 ) is applied. can do.
- the substrate end face insulating portion 26 may be formed before the n-type metal oxide semiconductor layers 22F and 22R, and after the formation of the n-type metal oxide semiconductor layers 22F and 22R, the charging layers 23F and 23R. It may be formed before or after the charge layers 23F and 23R. Since the high temperature treatment is also performed at the time of forming the charge layers 23F and 23R, it is preferable to apply a heat resistant material as the material of the substrate end face insulating portion 26 when forming before the charge layer.
- the n-type metal oxide semiconductor layers 22F and 22R and the charging layers 23F and 23R are formed from one end surface of the sheet-like negative electrode serving base material 21 to a little closer to the front, The example in which the insulation part 26 was formed is shown.
- the thicknesses of the substrate end surface insulating portions 26 on the front and back surfaces of the sheet-like negative electrode serving substrate 21 are about the thicknesses of the n-type metal oxide semiconductor layers 22F and 22R.
- the edges of the charging layers 23F and 23R on the base material end face insulating portion 26 side and the edges of the n-type metal oxide semiconductor layers 22F and 22R on the base end face insulating portion 26 side are substantially aligned.
- a step is generated between the front and back surfaces of the base material end face insulating portion 26 and the edge portions of the charging layers 23F and 23R.
- p-type metal oxide semiconductor layers 24 ⁇ / b> F and 24 ⁇ / b> R and positive electrode layers 25 ⁇ / b> F and 25 ⁇ / b> R are also laminated on the front surface and the back surface of the substrate end surface insulating portion 26.
- the positive electrode layers 25F and 25R themselves have a step on one end side of the sheet-like negative electrode serving base material 21.
- the sheet-shaped negative electrode serving substrate 21 is exposed to the outside by a predetermined length (drawing portion 21a).
- the distances to the end surfaces of both the front and back surfaces are the shortest in the n-type metal oxide semiconductor layers 22F and 22R, the shortest in the charge layers 23F and 23R, and the p-type metal oxide semiconductor layers 24F and 24R and the positive electrode layer 25F. 25R is the longest.
- the structure of the end portion of the substrate is not limited to this as long as it can prevent the positive electrode layers 25F and 25R from being short-circuited.
- the end surface of the base material end surface insulating portion 26 is also formed of a p-type metal oxide semiconductor layer or You may make it cover with a positive electrode layer.
- the p-type metal oxide semiconductor layers 24F and 24R on the front surface and the back surface are in communication with the coated p-type metal oxide semiconductor layers, and the positive electrode layers that cover the positive electrode layers 25F and 25R on the front surface and the back surface are connected. You may contact them.
- the surface side part and back surface side part of the base-material end surface insulating part 26 cover the end part side of the sheet-like negative electrode serving substrate 21 (in other words, the end side of the sheet-like negative electrode serving substrate 21)
- the end portions of the n-type metal oxide semiconductor layers 22F and 22R formed on the sheet-like negative electrode serving substrate 21 may be covered.
- the short circuit prevention structure in one edge part of the width direction of the sheet-like negative electrode combined use base material 21 was demonstrated.
- the same short-circuit prevention configuration as described above may be applied to one or both ends of the sheet-like negative electrode / substrate 21 in the longitudinal direction.
- FIG. 7 is an explanatory diagram illustrating a method for manufacturing the secondary battery according to the first embodiment.
- 7A1 to 7A4 are schematic perspective views
- FIGS. 7B1 to 7B4 are cross-sectional views.
- the cross-sectional views of FIGS. 7B1 to 7B4 are cross-sectional views in which the intermediate formed state of the secondary battery and the finished product are rotated by 90 degrees clockwise compared to the cross-sectional view shown in FIG.
- the base end surface insulating portion 26 is formed in the vicinity of one side in the width direction of the sheet-like negative electrode serving base 21.
- the non-formation region is masked during this formation.
- a SUS sheet is applied as the sheet-like negative electrode combined base material 21, and the base material end surface insulating portion 26 is formed at one end thereof.
- the substrate end surface insulating portion 26 is formed by a general resin film forming method (for example, spray coating).
- the material of the substrate end face insulating portion 26 is alumina (Al 2 O 3 ), silica (SiO 2 ), or the like, sputtering method, vapor deposition method, CVD method (chemical vapor deposition method), coating pyrolysis
- the base material end surface insulating portion 26 is formed (film formation) by a method or the like.
- the n-type metal oxide semiconductor layers 22F and 22R are formed.
- titanium dioxide (TiO 2 ) is applied as the material of the n-type metal oxide semiconductor layers 22F and 22R, and the n-type metal oxide semiconductor layer 22F, 22R is formed.
- the n-type metal oxide semiconductor layers 22F and 22R on the front surface and the back surface may be formed simultaneously, or may be formed on each side.
- the base material end face insulating portion 26 and the n-type metal oxide semiconductor layers 22F and 22R are not in a stacked relationship.
- the substrate end face insulating portion 26 may be formed after the formation (film formation) of the n-type metal oxide semiconductor layers 22F and 22R.
- the lead-out portion 21a in the sheet-like negative electrode combined base material 21 is secured so that a part of the n-type metal oxide semiconductor layers 22F and 22R is exposed, And it masks suitably so that it may not laminate
- the method of forming the charge layers 23F and 23R are described in International Publication WO2012 / 046325.
- the charging layers 23F and 23R on the front surface and the back surface may be formed at the same time, or may be formed on each side.
- the lead-out portion 21a in the sheet-like negative electrode serving base material 21 is part of the n-type metal oxide semiconductor layers 22F and 22R and the charging layers 23F and 23R.
- the p-type metal oxide semiconductor layer 24F is appropriately masked so that the p-type metal oxide semiconductor layer and the positive electrode layer are not formed on the end face of the substrate end face insulating part 26.
- And 24R are formed, and then positive electrode layers 25F and 25R are formed.
- 7A4 and 7B4 show a state after the positive electrode layers 25F and 25R are formed.
- nickel oxide (NiO) is applied as the material of the p-type metal oxide semiconductor layers 24F and 24R, and the p-type metal oxide semiconductor layers 24F and 24R are formed by sputtering, vapor deposition, CVD, coating pyrolysis, or the like.
- aluminum (Al) is applied as a material of the positive electrode layers 25F and 25R, and the positive electrode layers 25F and 25R are formed by a sputtering method, a vapor deposition method, a CVD method, a coating pyrolysis method, or the like.
- the p-type metal oxide semiconductor layers 24F and 24R on the front surface and the back surface may be formed at the same time, or may be formed on each side.
- the positive and negative electrode layers 25F and 25R on the front surface and the back surface may be formed at the same time, or may be formed on each side.
- the secondary battery 20 of the first embodiment having the structure shown in FIG. 6 is formed.
- the processing performed in parallel is shown, for example, the front surface side forming processing may be performed collectively, and after the front surface side forming processing is completed, the back surface side forming processing may be performed. That is, the n-type metal oxide semiconductor layer 22F, the charge layer 23F, the p-type metal oxide semiconductor layer 24F, and the positive electrode layer 25F on the surface side of the sheet-like negative electrode combined substrate 21 on which the substrate end face insulating portion 26 is formed. Then, the n-type metal oxide semiconductor layer 22R, the charging layer 23R, the p-type metal oxide semiconductor layer 24R, and the positive electrode layer 25R on the back surface side may be sequentially formed.
- the processing in the above process may be partially changed.
- the sheet-like negative electrode combined substrate 21 is arranged in the width direction at the cutting position. You may make it expose to.
- the manufactured secondary battery 20 of the first embodiment is folded in a bellows shape and accommodated in a case, a predetermined type of thin film is not formed in a bent portion that becomes an inner side when folded.
- the stress during bending may be reduced.
- the positive electrode layers 25F and 25R may not be formed in the bent portions, and the positive electrode layers 25F and 25R, the p-type metal oxide semiconductor layers 24F and 24R, and the charge layers 23F and 23R are formed in the bent portions. May not be formed. Or you may make it reduce the stress at the time of bending by selectively removing with a laser etc. after forming the thin film of a bending part.
- the mounting method of the secondary battery 20 of the first embodiment having the structure shown in FIG. 6 may be arbitrary. For example, you may make it stick as a power supply part of the apparatus which requires the secondary battery 20 with a flat sheet form. Further, for example, the manufactured secondary battery 20 may be cut into a predetermined length in the long direction and used for mounting.
- FIG. 8 reflecting the feature of being in the form of a sheet in which a structure that functions as a secondary battery is formed on each of both surfaces, a mounting structure as shown in FIG. 8 can be given.
- FIG. 8A shows an image-like perspective view of a section taken along line VIIIB-VIIIB in FIG.
- FIG. 8B shows an image-like perspective view of a section taken along line VIIIB-VIIIB in FIG.
- the positive electrode layer 25F on the front surface side of the secondary battery portion with a certain number of turns is in contact with the positive electrode layer 25R on the back surface side of the secondary battery portion with the number of turns one more than that, and is wound.
- the positive electrode layer does not contact other layers.
- the lead-out portion 21a side of the sheet-like negative electrode substrate 21 in the winding roll 31 is covered with an exposed negative electrode member 32 (which can be seen as an upper lid) made of a conductive material with which an external negative electrode terminal is brought into contact.
- the exposed negative electrode member 32 has a circular top plate and a cylindrical member that is provided below the periphery of the top plate and has a length similar to the length in the width direction of the lead portion 21a.
- a conductive member that enters the gap between the lead portions 21 a with different turns and contacts the lead portion 21 a may be suspended downward from the inner surface of the circular top plate.
- a conductive member is not limited to a sheet-like member, and may be a nonwoven fabric or a brush-like member.
- the end of the winding roll 31 on the opposite side of the lead-out portion 21a is covered with an exposed positive electrode member 33 (which can be seen as a lower lid) made of a conductive material with which an external positive electrode terminal is in contact.
- the exposed positive electrode member 33 includes a circular bottom plate, and a cylindrical member having a length similar to the length in the width direction of the portion of the positive electrode layer 25F, 25R that is lowered from the periphery of the bottom plate.
- a conductive member that enters the gap between the low-stage portions of the positive electrode layers 25F and 25R with different turns and comes into contact with the low-stage portions is suspended upward from the inner surface of the circular bottom plate. May be.
- Such a conductive member is not limited to a sheet-like member, and may be a nonwoven fabric or a brush-like member.
- FIG. 8C shows a state in which the exposed negative electrode member 32 and the exposed positive electrode member 33 are attached to the take-up roll 31.
- the substantially cylindrical side surface is covered with a sheet-like insulating member 34 to complete a secondary battery 35 for practical use.
- the procedure for attaching the sheet-like insulating member 34 after attaching the exposed negative electrode member 32 and the exposed positive electrode member 33 has been described above. However, the exposed negative electrode member 32 and the exposed positive electrode member 33 are attached after the sheet-like insulating member 34 is attached.
- the secondary battery 35 may be completed by the attaching procedure.
- the negative electrode has an intentional lead portion 21a for contacting an external electrode member (for example, the exposed negative electrode member 32).
- the positive electrode also has a portion that contacts the external electrode member (for example, the exposed positive electrode member 33) by increasing the film forming region toward the end face in the width direction. It can be formed thin and requires less man-hours for forming.
- the positive electrodes 25F and 25R become rod-shaped lead portions wound up in a roll shape. Thereby, a simple and low-resistance electrical connection is possible, and loss during charging and discharging is reduced. In addition, the number of manufacturing steps can be reduced as compared with a method in which an extraction electrode is externally attached to the positive and negative electrodes.
- the secondary battery 20 of the first embodiment constitutes a unit cell (unit secondary battery) on both surfaces of the sheet-like negative electrode combined base material 21, energy density can be improved.
- two conventional secondary batteries with the base material remaining on the base material (which may also be a negative electrode base material) remain, and the back surfaces of the base materials are bonded to both sides.
- the secondary battery 20 of the first embodiment can make the thickness of the base material about half that of the secondary battery to be compared. The density can be increased.
- the secondary battery 20 of the first embodiment two unit cells are connected in parallel, with two unit cells sharing the sheet-like negative electrode substrate 21.
- a component for connecting the two separate unit cells in parallel is required. Therefore, it can be said that the structure and the manufacturing process of the secondary battery 20 of the first embodiment are simplified.
- Heat treatment is included in the manufacturing process such as the formation of the charge layers 23F and 23R. Since both sides of the sheet-like negative electrode substrate 21 are covered with the n-type metal oxide semiconductor layers 22F and 22R at an early stage, problems such as oxidation during heat treatment are smaller than those of the conventional secondary battery. .
- the positive electrode layers 25F and 25R are the positive electrode layers that are in contact with each other even when the plurality of secondary batteries 20 are overlaid, or when one or more secondary batteries 20 are wound or folded. Thereby, various mounting structures can be taken without using an insulating member or the like.
- the negative electrode is also used as the base material.
- the positive electrode may be used as the base material.
- a p-type metal oxide semiconductor layer, a charge layer, an n-type metal oxide semiconductor layer, and a negative electrode layer are sequentially formed on the positive electrode substrate.
- a charging layer, an n-type metal oxide semiconductor layer, and a negative electrode layer are sequentially formed on a positive electrode substrate on which a p-type metal oxide semiconductor layer has already been formed.
- the negative electrode combined base material which is the base of the secondary battery is a rectangular sheet having a large difference between the short side and the long side.
- the material is not limited to that of the first embodiment.
- it may be a rectangle having the same length in the vertical and horizontal directions, or may be another shape such as a circle or a hexagon. In the case of a circle or hexagon, it is preferable to add a portion corresponding to the lead portion to the basic shape.
- the negative electrode combined substrate is formed in a cylindrical shape, and the same unit cell as in the first embodiment is formed on both the outer and inner surfaces of the cylindrical side surface (which may include the bottom surface if there is a bottom). You may make it comprise.
- the both sides of the negative electrode substrate 21 are provided with a portion that functions as the negative electrode lead portion 21a.
- the lead portion is provided on one side (for example, the back surface). Instead of providing a portion that functions as 21a, almost the entire back surface may function as a unit cell.
- a lead portion 21a is provided at one or both ends in the longitudinal direction, and no portion that functions as the lead portion 21a is provided at both ends in the width direction. You may do it.
- the negative electrode lead portion 21a is a flat plate, but the present invention is not limited to this.
- the lead-out portion 21a of the negative electrode may have a comb shape or a sawtooth shape.
- the lead-out part 21a of the negative electrode may have an opening in which a cylinder or a rod is fitted.
- the base material end face insulating portion 26 is positively formed by a thin film forming process or the like.
- the base end face insulating portion 26 is formed by another method. May be.
- the sheet-like negative electrode combined base material 21 is formed by depositing a conductive thin film on the surface of the insulator by sputtering or plating, the conductivity to the region that becomes the base material end surface insulating portion 26 is obtained. You may make it comprise the base-material end surface insulation part 26 by preventing adhesion of a thin film.
- the substrate end surface insulating portion 26 is provided in a U-shaped cross section, but the method of attaching the substrate end surface insulating portion 26 is not limited to this. Further, the base material end face insulating portion 26 may not be provided as long as the insulation between the positive electrode layer and the negative electrode layer can be secured in the vicinity of the end face of the substrate.
- FIG. 9A shows a case where the base end face insulating portion 26 is provided so as to cover only the end face of the sheet negative electrode serving base material 21 without being provided on the front surface or the back surface side of the sheet negative electrode serving base material 21. Yes.
- FIG. 9A shows a case where the base end face insulating portion 26 is provided so as to cover only the end face of the sheet negative electrode serving base material 21 without being provided on the front surface or the back surface side of the sheet negative electrode serving base material 21. Yes.
- FIG. 9A shows a case where the base end face insulating portion 26 is provided so as to cover only the end face of the sheet negative electrode serving base material 21 without being provided
- FIG. 9B shows an n-type metal oxide semiconductor layer, a charge layer, a p-type metal oxide semiconductor layer, and a positive electrode layer on the end face of the sheet-like negative electrode serving base material 21 so as to continue from the front surface to the back surface.
- the case where the base-material end surface insulating part 26 is made unnecessary by providing is shown.
- the mounting structure of the secondary battery 20 of the first embodiment is not limited as described above.
- Several examples of mounting structures other than the winding roll described above are as follows.
- the secondary battery 20 may be folded into two at the center in the longitudinal direction for mounting, and the folded two are folded in the width direction so that the positive electrode and the negative electrode are not short-circuited. You may make it mount a thing in a case etc. Furthermore, the bellows-like shape may be mounted on a case or the like by alternately changing the folding direction, and the reverse shape having the same folding direction for each folding may be mounted on the case or the like. . In the case of a bellows shape or a fabric shape, bend using a thin cylinder or rod, and apply a conductive material used for the electrode as this cylinder or rod, and connect the positive electrode layer and the external positive electrode member. You may make it bear the function to contact electrically.
- the one that is bent at a predetermined angle (for example, 45 degrees) other than 90 degrees with respect to the longitudinal direction and is changed along the horizontal direction so as to extend in the other direction is provided for mounting.
- a predetermined angle for example, 45 degrees
- both ends of the secondary battery 20 in the longitudinal direction are physically connected (which may be electrically connected or electrically connected in an insulated state).
- a plurality of thin cylinders or rods apply tension to the endless belt-like secondary battery, and each cylinder or rod electrically communicates the positive electrode layer and the external positive electrode member in the same manner as described above. You may make it bear the function to do.
- an insulating sheet, an insulating plate, or the like may be appropriately interposed. Moreover, you may make it utilize the positive electrode connection member which connects the positive electrode layers 25F and 25R and an exposed positive electrode member by mounting.
- the unit cell is a quantum battery.
- the unit cell is not limited to a quantum battery, and may be a sheet-like (parallel plate-like) secondary battery.
- the solid lithium ion secondary battery can also be a unit cell provided on both surfaces of the negative electrode substrate or the positive electrode substrate.
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Abstract
Description
以下、本発明による二次電池及びその製造方法の第1の実施形態について、図面を参照しながら説明する。第1の実施形態の二次電池は量子電池である。
図6は、第1の実施形態に係る二次電池20の構成を示す断面図であり、上述した図4(B)と同様な方向から見た断面図である。図6は、面方向の寸法より厚み方向の寸法を強調して示している。
次に、図6に示す構造を有する第1の実施形態の二次電池20の製造方法を説明する。図7は、第1の実施形態の二次電池の製造方法を示す説明図である。図7(A1)~(A4)が概略斜視図であり、図7(B1)~(B4)が断面図である。図7(B1)~(B4)の断面図は、上述した図6に示す断面図に比較し、二次電池の中間形成状態や完成品を時計方向に90度だけ回転した断面図である。
次に、図6に示す構造を有する第1の実施形態の二次電池20の実装構造の一例を説明する。
第1の実施形態の二次電池20によれば、以下の効果を奏することができる。
上記第1の実施形態の説明においても、種々変形実施形態に言及したが、さらに、以下に例示するような変形実施形態を挙げることができる。
Claims (9)
- 第1電極としての機能と基材としての機能とを発揮するシート状の第1電極兼用基材と、
上記第1電極兼用基材の表面側に設けられた表面側蓄電層と、
上記表面側蓄電層に積層された表面側第2電極層と、
上記第1電極兼用基材の裏面側に設けられた裏面側蓄電層と、
上記裏面側蓄電層に積層された裏面側第2電極層と
を備えることを特徴とする二次電池。 - 上記表面側蓄電層及び上記裏面側蓄電層はそれぞれ、酸化物半導体が、バンドギャップ内に電子不在のエネルギー準位が多数発生する光励起構造変化を起こし、エネルギー準位に電子を捕獲させることで充電し、捕獲した電子を放出させることで放電する充電層でなり、
上記第1電極兼用基材と上記表面側充電層との間に設けられた表面側第1酸化物半導体層と、
上記第1電極兼用基材と上記裏面側充電層との間に設けられた裏面側第1酸化物半導体層と、
上記表面側充電層と上記表面側第2電極層との間に設けられた表面側第2酸化物半導体層と、
上記裏面側充電層と上記裏面側第2電極層との間に設けられた裏面側第2酸化物半導体層とをさらに備えたことを特徴とする請求項1に記載の二次電池。 - 上記表面側充電層及び上記表面側第2電極層が設けられていない領域、及び、上記裏面側充電層及び上記裏面側第2電極層が設けられていない領域の少なくとも一方を、上記第1電極を外部の第1電極部材と接続する領域として有することを特徴とする請求項1又は2に記載の二次電池。
- 上記第1電極兼用基材の少なくとも一部の端面に、上記表面側第2電極層及び上記裏面側第2電極層と、上記第1電極との短絡を防止する基材端面絶縁部を設けたことを特徴とする請求項1~3のいずれかに記載の二次電池。
- 上記表面側第1酸化物半導体層及び上記裏面側第1酸化物半導体層はn型金属酸化物半導体で、上記表面側第2酸化物半導体層及び上記裏面側第2酸化物半導体層はp型金属酸化物半導体であることを特徴とする請求項1~4のいずれかに記載の二次電池。
- 上記表面側第1酸化物半導体層及び上記裏面側第1酸化物半導体層はp型金属酸化物半導体で、上記表面側第2酸化物半導体層及び上記裏面側第2酸化物半導体層はn型金属酸化物半導体であることを特徴とする請求項1~4のいずれかに記載の二次電池。
- 第1電極としての機能と基材としての機能とを発揮するシート状の第1電極兼用基材の表面側及び裏面側に第1酸化物半導体層を積層する工程と、
表面側の上記第1酸化物半導体層に表面側充電層を積層する工程と、
裏面側の上記第1酸化物半導体層に裏面側充電層を積層する工程と、
上記表面側充電層及び上記裏面側充電層に紫外線を照射する工程と、
上記表面側充電層に第2酸化物半導体層及び第2電極層を積層する工程と、
上記裏面側充電層に第2酸化物半導体層及び第2電極層を積層する工程と
を含むことを特徴とする二次電池の製造方法。 - 上記シート状の第1電極兼用基材の端部に基材端面絶縁部を形成する工程をさらに有することを特徴とする請求項7に記載の二次電池の製造方法。
- 第1電極としての機能と基材としての機能とを発揮するシート状の第1電極兼用基材の表面から裏面に連続するように第1酸化物半導体層を積層する工程と、
上記第1酸化物半導体層の一部又は全部を覆うように充電層を積層する工程と、
上記充電層に紫外線を照射する工程と、
上記充電層の一部又は全部を覆うように第2の半導体酸化物層及び第2電極層を積層する工程と
を含むことを特徴とする二次電池の製造方法。
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KR1020167009239A KR101897108B1 (ko) | 2013-12-10 | 2013-12-10 | 이차전지 및 그 제조방법 |
PCT/JP2013/083063 WO2015087388A1 (ja) | 2013-12-10 | 2013-12-10 | 二次電池及びその製造方法 |
US15/024,467 US9917330B2 (en) | 2013-12-10 | 2013-12-10 | Secondary battery |
CN201380081530.7A CN105814728B (zh) | 2013-12-10 | 2013-12-10 | 二次电池及其制造方法 |
CA2924766A CA2924766C (en) | 2013-12-10 | 2013-12-10 | Secondary battery and method of manufacturing the same |
EP13899240.9A EP3038166B1 (en) | 2013-12-10 | 2013-12-10 | Secondary cell and method for producing same |
TW103104722A TWI527286B (zh) | 2013-12-10 | 2014-02-13 | Secondary battery and manufacturing method thereof |
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US12150382B2 (en) | 2019-06-26 | 2024-11-19 | Sanoh Industrial Co., Ltd. | Thermoelectric generation module |
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SE537191C2 (sv) * | 2013-05-31 | 2015-03-03 | Scania Cv Ab | Intrinsiskt överladdningsskydd för battericell |
JP6854100B2 (ja) * | 2016-08-31 | 2021-04-07 | 株式会社日本マイクロニクス | 二次電池 |
JP6966232B2 (ja) * | 2017-06-20 | 2021-11-10 | 株式会社日本マイクロニクス | シート状二次電池、電池構造体、及びシート二次電池の製造方法 |
TWI667805B (zh) * | 2017-10-13 | 2019-08-01 | 行政院原子能委員會核能研究所 | 降低金屬氧化物半導體之阻值的方法及其量子電池的製法 |
JP2019140053A (ja) * | 2018-02-15 | 2019-08-22 | 株式会社日本マイクロニクス | 二次電池 |
EP3780221B1 (en) * | 2018-03-28 | 2024-09-11 | NGK Insulators, Ltd. | Lithium rechargeable battery and card with built-in battery |
JP2021157881A (ja) * | 2020-03-25 | 2021-10-07 | 株式会社パワーフォー | 二次電池 |
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- 2013-12-10 KR KR1020167009239A patent/KR101897108B1/ko active IP Right Grant
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- 2013-12-10 CA CA2924766A patent/CA2924766C/en not_active Expired - Fee Related
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2014
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WO2017199618A1 (ja) * | 2016-05-19 | 2017-11-23 | 株式会社日本マイクロニクス | 二次電池の製造方法 |
JP2017212430A (ja) * | 2016-05-19 | 2017-11-30 | 株式会社日本マイクロニクス | 二次電池の製造方法 |
US12150382B2 (en) | 2019-06-26 | 2024-11-19 | Sanoh Industrial Co., Ltd. | Thermoelectric generation module |
Also Published As
Publication number | Publication date |
---|---|
EP3038166B1 (en) | 2019-11-13 |
CN105814728B (zh) | 2019-02-22 |
TW201523964A (zh) | 2015-06-16 |
CA2924766C (en) | 2019-06-11 |
KR101897108B1 (ko) | 2018-09-11 |
KR20160052718A (ko) | 2016-05-12 |
EP3038166A1 (en) | 2016-06-29 |
TWI527286B (zh) | 2016-03-21 |
US9917330B2 (en) | 2018-03-13 |
CN105814728A (zh) | 2016-07-27 |
CA2924766A1 (en) | 2015-06-18 |
US20160276711A1 (en) | 2016-09-22 |
EP3038166A4 (en) | 2018-03-14 |
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