WO2015115080A1 - 密閉型蓄電池 - Google Patents
密閉型蓄電池 Download PDFInfo
- Publication number
- WO2015115080A1 WO2015115080A1 PCT/JP2015/000318 JP2015000318W WO2015115080A1 WO 2015115080 A1 WO2015115080 A1 WO 2015115080A1 JP 2015000318 W JP2015000318 W JP 2015000318W WO 2015115080 A1 WO2015115080 A1 WO 2015115080A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal plate
- flange portion
- recess
- storage battery
- folded back
- Prior art date
Links
- 238000003860 storage Methods 0.000 title claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 91
- 239000002184 metal Substances 0.000 claims abstract description 91
- 239000011347 resin Substances 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 238000003466 welding Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005304 joining Methods 0.000 abstract description 2
- 239000012943 hotmelt Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 239000011255 nonaqueous electrolyte Substances 0.000 description 6
- 239000011267 electrode slurry Substances 0.000 description 5
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 3
- 229910013870 LiPF 6 Inorganic materials 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- GEWWCWZGHNIUBW-UHFFFAOYSA-N 1-(4-nitrophenyl)propan-2-one Chemical compound CC(=O)CC1=CC=C([N+]([O-])=O)C=C1 GEWWCWZGHNIUBW-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910013131 LiN Inorganic materials 0.000 description 1
- 229910013528 LiN(SO2 CF3)2 Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- NXPZICSHDHGMGT-UHFFFAOYSA-N [Co].[Mn].[Li] Chemical compound [Co].[Mn].[Li] NXPZICSHDHGMGT-UHFFFAOYSA-N 0.000 description 1
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 description 1
- ZYXUQEDFWHDILZ-UHFFFAOYSA-N [Ni].[Mn].[Li] Chemical compound [Ni].[Mn].[Li] ZYXUQEDFWHDILZ-UHFFFAOYSA-N 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 150000005678 chain carbonates Chemical class 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000002482 conductive additive Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 150000005676 cyclic carbonates Chemical class 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- 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
- H01M50/545—Terminals formed by the casing of the 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- 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
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/193—Organic material
-
- 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
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
- H01M50/557—Plate-shaped terminals
-
- 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
- H01M50/562—Terminals characterised by the material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a sealed storage battery including two metal plates that also serve as electrodes.
- Patent Document 1 uses, as shown in the perspective view of FIG. 1 and the A1-A2 cross-sectional view of FIG. 1 shown in FIG. A battery is disclosed in which a concave portion having a flange portion is formed on the periphery of one metal and two metals are sealed with an adhesive film.
- Patent Document 1 eliminates the need for protruding metal terminals from the exterior body, so that the production efficiency of the battery is improved. There are challenges.
- An object of the present invention is to provide a sealed storage battery that is easy to manufacture, has a low short-circuit risk, and has an improved energy density of the entire battery.
- a sealed storage battery of the present invention includes a first metal plate in which a recess having a flange portion is formed on the periphery, a laminated electrode body accommodated in the recess, the flange portion, and the A battery including a second metal plate covering the recess, wherein the first metal plate and the second metal plate also serve as electrodes, and the flange portion includes the second metal plate and a heat welding resin.
- the flange portion and the joint portion of the second metal plate are folded back to the concave portion side, and the outer edge of the flange portion folded back to the concave portion is It protrudes rather than the outer edge of the said 2nd metal plate folded by the side of a recessed part.
- the joint between the flange portion of the first metal plate and the second metal plate is folded back toward the concave portion, the energy density of the entire battery is improved.
- the outer edge of the flange portion folded back to the recess side protrudes from the outer edge of the second metal plate folded back to the recess side, a battery with a low short-circuit risk is easily manufactured. It is possible.
- FIG. 6 is a perspective view and a cross-sectional view of A1-A2 of the battery of Patent Document 1. It is a perspective view of the battery which is an example of embodiment.
- FIG. 3 is a cross-sectional view showing a B2 one side portion of the B1-B2 cross section shown in FIG. 2. It is a top view of the 1st metal plate 101 and the 2nd metal plate 102 which were used for an example of an embodiment.
- FIG. 9 is a plan view and a C1-C2 cross-sectional view of a first metal plate 101 used in Modification 1.
- FIG. 11 is a perspective view of a battery according to Modification 2.
- FIG. 11 is a perspective view of a battery according to Modification 3.
- FIG. 2 is a perspective view showing an external configuration of the sealed storage battery according to the first embodiment of the present invention
- FIG. 3 is a cross-sectional view showing a B2 one side portion of the B1-B2 cross section shown in FIG.
- the battery 100 includes a first metal plate 101 having a recess 101 b having a flange 101 a on the periphery, a laminated electrode body (not shown) housed in the recess, A second metal plate 102 is provided to cover the flange 101a and the recess 101b.
- Each of the first metal plate 101 and the second metal plate 102 is an exterior body that also serves as an electrode.
- the flange portion 101 a is joined to the second metal plate 102 via the heat welding resin 103.
- the flange portion 101 a and the second metal plate 102 are folded back along the side surface of the recess 101 b, and the outer edge of the folded flange portion 101 a protrudes from the outer edge of the second metal plate 102.
- a method for manufacturing the battery 100 will be described below.
- NMP N-methyl-2-pyrrolidone
- the solution was mixed to prepare a positive electrode slurry.
- the obtained positive electrode slurry was applied to both surfaces of a positive electrode current collector made of an aluminum foil having a thickness of 15 ⁇ m, dried to form a positive electrode active material layer, and then compressed with a roller. By cutting, a belt-like positive electrode was obtained.
- a positive electrode mixture-containing paste is applied to the outermost part.
- the exposed portion of the positive electrode current collector was left on both sides of the positive electrode current collector.
- the positive electrode had a width of 332 mm and a height of 22 mm, and the length of the exposed portion of the positive electrode current collector that was the outermost periphery when wound was 20 mm.
- the completed negative electrode is overlapped with the positive electrode through a separator, and the negative electrode containing paste is not applied to the portion that becomes the outermost peripheral part when wound into a spiral to form an electrode body having a wound structure,
- An exposed portion of the negative electrode current collector was left on both sides of the negative electrode current collector.
- the negative electrode had a width of 331 mm and a height of 23 mm, and the length of the exposed portion of the negative electrode current collector at the outermost portion when wound was 20 mm.
- the positive electrode and the negative electrode are spirally wound so that a separator made of a polyethylene microporous film (width 751 mm, height 24 mm, thickness 20 ⁇ m) is interposed between the positive electrode and the negative electrode. Fixed with tape.
- a first metal plate 101 having a concave portion 101b having a flange portion 101a at the periphery was prepared, and an electrode body was inserted into the concave portion 101b.
- the portion where the positive electrode current collector was exposed in the outermost peripheral portion of the wound electrode body was inserted so as to be in contact with the inner surface of the recess 101b.
- the flange portion 101a had R1 of 2.8 cm, R2 of 2.8 cm, and R3 of 0.3 cm.
- the recess 101b was 2.7 cm long, 2.7 cm wide, and 0.35 cm deep. Aluminum was used as the first metal plate 101.
- the concave portion 101b was covered with a second metal plate 102 as shown in FIG.
- the inner surface of the second metal plate 102 was in contact with the exposed portion of the negative electrode current collector in the outermost peripheral portion of the wound electrode body.
- a 70 ⁇ m heat welding resin 103 is previously welded to each portion of the flange portion 101a and the second metal plate 102 facing the flange portion 101a.
- modified polypropylene was used as the heat welding resin 103.
- the exposed portion of the positive electrode current collector and the inner surface of the recess 101b were connected by welding, and the exposed portion of the negative electrode current collector and the inner surface of the second metal plate 102 were connected by welding.
- the non-aqueous electrolyte is placed in the recess 101b in which the wound electrode body is accommodated. And the remaining four surfaces of the second metal plate 102 facing the flange portion 101a were joined by thermocompression bonding.
- the flange portion 101a and the opposing second metal plate were folded back to the concave portion 101b side to produce the battery 100. After the folding process, it was confirmed that in each folded part, the outer edge of the flange part 101a protruded on all sides rather than the second metal plate.
- the flange portion 101a and the second metal plate 102 are folded back toward the concave portion 101b as compared with the conventional battery. As a result, the energy density of the entire battery is improved. Furthermore, the outer edge of the flange portion 101a protrudes beyond the outer edge of the second metal plate 102, and the flange portion 101a and the second metal plate 102 are folded back toward the concave portion, so that a battery with a low short-circuit risk can be obtained. It can be easily manufactured.
- FIG. 5A is a plan view showing the first metal plate 101 before the folding process in the sealed storage battery according to the first modification of the first embodiment
- FIG. 5B shows a C1-C2 cross section. It is sectional drawing.
- the flange 101a of the first metal plate 101 is formed with a folding recess 101c so as to facilitate the folding process.
- the folding recess 101c is not limited to the shape shown in FIG. 5B, and may be a triangular shape or the like.
- the folding recess is also formed in the second metal plate 102.
- the folding recess may be formed in either the flange portion 101a or the second metal plate 102.
- the folding recess is formed by pressing or notching the first metal plates 101 and 102.
- a projection may be formed on the opposite side of the recess of each metal plate.
- FIG. 6 shows a sealed storage battery according to Modification 2 of the first embodiment.
- FIG. 7 shows a sealed storage battery according to Modification 3 of the first embodiment.
- the flange portion 101a is such that all the outer edges of the folded second metal plate 102 are smaller than the flange portion 101a of the first metal plate 101, and the folded flange portion 101a Some of the outer edges do not touch each other.
- the joint portion of the flange portion 101a and the second metal plate 102 being folded back toward the concave portion means that the joint portion is folded back toward the bottom surface side of the concave portion.
- each outer edge of the flange portion 101a protrudes by 0.01 to 3 mm from each outer edge of the opposing second metal plate 102.
- the portion of the second metal plate 102 facing the flange portion 101a and the flange portion 101a only needs to be folded back to the concave portion side, and is folded according to the shape required for the device using the battery 100 or the like.
- the surface is appropriately selected.
- the first metal plate 101 may be thermocompression bonded to the second metal plate 102 by the heat welding resin 103.
- Examples of the heat welding resin 103 include modified polyolefin.
- the heat welding resin may include a heat resistant layer.
- An example of the heat-resistant layer is polyimide.
- the heat welding resin formed on the flange portion 101a and the second metal plate 102 may be different.
- the heat welding resin 103 may be formed only on one of the flange portion 101 a of the first metal plate 101 or the second metal plate 102. After inserting the heat welding resin using the flange portion 101a of the first metal plate 101 and the second metal plate 102 on which the heat welding resin is not formed, the flange portion 101a and the second metal plate 101 of the first metal plate 101 are inserted.
- the metal plate 102 may be bonded.
- the heat welding resin 103 formed on the second metal plate 102 is extended by 0.1 to 3 mm from the bonded inner edge, so that the positive and negative metal plates A short circuit can be prevented more reliably.
- the second metal plate 102 which is a flat plate, is used, but the second metal plate 102 may include a recess and a flange as in the first metal plate 101.
- first metal plates 101 and 102 aluminum, stainless steel, nickel, or copper may be used.
- the thickness of the first metal plates 101 and 102 is preferably 10 to 300 ⁇ m.
- the positive electrode active material is not limited to the lithium cobaltate used in the first embodiment, but is lithium nickelate, lithium manganate, lithium cobalt nickel composite oxide, lithium cobalt manganese composite oxide, lithium nickel manganese composite. It is possible to use oxides or those obtained by substituting some of these transition metal elements with Al, Mg, Zr, or the like.
- the negative electrode active material may be any material other than graphite such as natural graphite and artificial graphite, as long as it can insert and desorb lithium ions, such as graphite, coke, tin oxide, metallic lithium, silicon, and a mixture thereof. .
- the concentration of the supporting salt is not particularly limited, but is preferably 0.8 to 1.8 mol per liter of the electrolyte.
- the solvent species include carbonate solvents such as propylene carbonate (PC), ⁇ -butyrolactone (GBL), ethyl methyl carbonate (EMC), dimethyl carbonate (DMC), and diethyl carbonate (DEC). More preferably, a combination of a cyclic carbonate and a chain carbonate is desirable.
- PC propylene carbonate
- GBL ⁇ -butyrolactone
- EMC ethyl methyl carbonate
- DMC dimethyl carbonate
- DEC diethyl carbonate
- DEC diethyl carbonate
- the non-aqueous electrolyte is not limited to the non-aqueous electrolyte and may be a polymer electrolyte.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
Description
実施形態の説明で参照する図面は、模式的に記載されたものであり、図面に描画された構成要素の寸法比率などは、現物と異なる場合がある。具体的な寸法比率等は、以下の説明を参酌して判断されるべきである。
図2は、本発明の第1実施形態に係る密閉型蓄電池の外観構成を示す斜視図、図3は、図2に示すB1-B2断面のB2片側部分を示した断面図である。
<正極の作製>
正極活物質としてのLiCoO2 を94重量部と、導電助剤としてカーボンブラックを3重量部と、バインダーとしてのポリフッ化ビニリデンを3重量部とを溶剤としてのN-メチル-2-ピロリドン(NMP)溶液とを混合して正極用スラリーを調製した。得られた正極用スラリーを厚さ15μmのアルミニウム箔からなる正極集電体の両面に塗布し、乾燥して、正極活物質層を形成し、その後、ローラーで圧縮した後、所定の大きさに切断して、帯状の正極を得た。なお、完成後の正極をセパレータを介して負極と重ね合わせて、渦巻状に巻回して巻回構造の電極体としたときに、最外周部となる部分には正極合剤含有ペーストを塗布せず、正極集電体の両面に正極集電体の露出部分が残るようにしておいた。この正極の幅は332mmで高さが22mmであり、また、巻回したときに最外周部となる部分の正極集電体の露出部分の長さは20mmであった。
負極活物質としての黒鉛粉末を96質量%と、結着剤としてのカルボキシメチルセルロース(CMC)を2質量%、及びスチレンブタジエンゴム(SBR)を2質量%と、溶剤として純水とを混合して負極用スラリーを調製した。得られた負極用スラリーを厚さが10μmの銅箔からなる負極集電体の両面に塗布し、乾燥して、負極用スラリーを形成し、その後、ローラーで圧縮した後、所定の大きさに切断してシート状の負極を得た。なお、完成後の負極をセパレータを介して前記正極と重ね合わせて、渦巻状に巻回して巻回構造の電極体としたときに最外周部となる部分には負極含有ペーストを塗布せず、負極集電体の両面に負極集電体の露出部分が残るようにしておいた。この負極の幅は331mmで高さは23mmであり、また、巻回したときに最外周部となる部分の負極集電体の露出部分の長さは20mmであった。
エチレンカーボネート(EC)とジエチルカーボネート(DEC)を体積比30:70の割合で混合された混合溶媒に、LiPF6が1M(モル/リットル)の割合で溶解されたものを非水電解液とした。
前記正極と負極とを両者の間にポリエチレン製微多孔膜(幅751mm、高さ24mm、厚さ20μm)からなるセパレータが介在するようにして、渦巻状に巻回し、扁平に押圧し、セパレータをテープにて固定した。
図4(a)に示すような、周縁にフランジ部101aを有する凹部101bが形成された第1の金属板101を用意して、凹部101bに電極体を挿入した。この際、巻回電極体の最外周部において正極集電体が露出した部分が凹部101bの内面に接するように挿入した。なお、フランジ部101aは、R1が2.8cm、R2が2.8cm、R3が0.3cmとした。凹部101bは、縦2.7cm、横2.7cm、深さは0.35cmとした。第1の金属板101としてはアルミニウムを用いた。
図5(a)は、第1実施形態の変形例1に係る密閉型蓄電池における、折り返し加工前の第1の金属板101を示す平面図、図5(b)は、C1-C2断面を示す断面図である。図5(a)(b)に示すように、第1の金属板101のフランジ部101aには、折り返し加工がしやすくなるように、折り返し用凹部101cが形成されている。折り返し用凹部101cは、図5(b)の形状に制限されるものではなく、三角型等でも良い。図示しないが、折り返し用凹部は、第2の金属板102にも形成されている。折り返し用凹部は、フランジ部101aまたは第2の金属板102のいずれかに形成されていれば良い。
〔その他の事項〕
Claims (3)
- 周縁にフランジ部を有する凹部が形成された第1の金属板と、前記凹部に収容された積層電極体と、前記フランジ部及び前記凹部を覆う第2の金属板とを備える密閉型蓄電池であって、
前記第1の金属板及び前記第2の金属板は電極を兼ね、
前記フランジ部は、前記第2の金属板と、熱溶着樹脂を介して接合されており、
前記フランジ部と前記第2の金属板の接合部は、前記凹部の側に折り返されており、
前記凹部の側に折り返されている前記フランジ部の外縁は、前記凹部の側に折り返されている前記第2の金属板の外縁よりも突出している、密閉型蓄電池。 - 前記フランジ部において、前記第2の金属板の外縁よりも突出している部位は、前記熱溶着樹脂を備える、請求項1に記載の密閉型蓄電池。
- 前記フランジ部及び前記第2の金属板の接合部は、折り返し用凹部に沿って折り返されている、請求項1または請求項2に記載の密閉型蓄電池。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015559817A JPWO2015115080A1 (ja) | 2014-01-30 | 2015-01-26 | 密閉型蓄電池 |
CN201580006680.0A CN105940545A (zh) | 2014-01-30 | 2015-01-26 | 密闭型蓄电池 |
US15/113,312 US9685642B2 (en) | 2014-01-30 | 2015-01-26 | Sealed storage battery |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014015251 | 2014-01-30 | ||
JP2014-015251 | 2014-01-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015115080A1 true WO2015115080A1 (ja) | 2015-08-06 |
Family
ID=53756662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/000318 WO2015115080A1 (ja) | 2014-01-30 | 2015-01-26 | 密閉型蓄電池 |
Country Status (4)
Country | Link |
---|---|
US (1) | US9685642B2 (ja) |
JP (1) | JPWO2015115080A1 (ja) |
CN (1) | CN105940545A (ja) |
WO (1) | WO2015115080A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN207818631U (zh) * | 2017-11-17 | 2018-09-04 | 宁德新能源科技有限公司 | 电池 |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61290644A (ja) * | 1985-06-18 | 1986-12-20 | Matsushita Electric Ind Co Ltd | 超薄形電池 |
JPS6255865A (ja) * | 1985-09-02 | 1987-03-11 | Hitachi Maxell Ltd | 薄形リチウム電池 |
JPS62296361A (ja) * | 1986-06-16 | 1987-12-23 | Seiko Electronic Components Ltd | 平板型電池及びその製造方法 |
JPH01239759A (ja) * | 1988-03-18 | 1989-09-25 | Hitachi Maxell Ltd | 薄形リチウム電池 |
JPH02250257A (ja) * | 1989-03-22 | 1990-10-08 | Fuji Elelctrochem Co Ltd | ペーパー電池 |
JPH04319253A (ja) * | 1991-04-16 | 1992-11-10 | Mitsubishi Electric Corp | Icカード用薄型電池 |
JPH11102675A (ja) * | 1997-09-29 | 1999-04-13 | Yuasa Corp | 薄形非水電解質電池 |
JP2000353503A (ja) * | 1999-06-10 | 2000-12-19 | Matsushita Electric Ind Co Ltd | 扁平形有機電解液電池及びその製造法 |
US6265102B1 (en) * | 1998-11-05 | 2001-07-24 | Electric Fuel Limited (E.F.L.) | Prismatic metal-air cells |
JP2001256933A (ja) * | 2000-03-10 | 2001-09-21 | Mitsubishi Chemicals Corp | 電池及び電池パック |
JP2005108790A (ja) * | 2003-10-02 | 2005-04-21 | Nissan Motor Co Ltd | 積層型電池 |
JP2009146812A (ja) * | 2007-12-17 | 2009-07-02 | Nissan Motor Co Ltd | 電池ケース及び組電池 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4354152B2 (ja) | 2002-05-31 | 2009-10-28 | 大日本印刷株式会社 | 電池およびその製造方法 |
CN104916793B (zh) * | 2009-11-27 | 2018-08-24 | 麦克赛尔控股株式会社 | 扁平形非水二次电池 |
JP6109058B2 (ja) * | 2013-12-17 | 2017-04-05 | 新日鉄住金マテリアルズ株式会社 | シールケース及びその製造方法 |
-
2015
- 2015-01-26 WO PCT/JP2015/000318 patent/WO2015115080A1/ja active Application Filing
- 2015-01-26 US US15/113,312 patent/US9685642B2/en active Active
- 2015-01-26 CN CN201580006680.0A patent/CN105940545A/zh active Pending
- 2015-01-26 JP JP2015559817A patent/JPWO2015115080A1/ja not_active Ceased
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61290644A (ja) * | 1985-06-18 | 1986-12-20 | Matsushita Electric Ind Co Ltd | 超薄形電池 |
JPS6255865A (ja) * | 1985-09-02 | 1987-03-11 | Hitachi Maxell Ltd | 薄形リチウム電池 |
JPS62296361A (ja) * | 1986-06-16 | 1987-12-23 | Seiko Electronic Components Ltd | 平板型電池及びその製造方法 |
JPH01239759A (ja) * | 1988-03-18 | 1989-09-25 | Hitachi Maxell Ltd | 薄形リチウム電池 |
JPH02250257A (ja) * | 1989-03-22 | 1990-10-08 | Fuji Elelctrochem Co Ltd | ペーパー電池 |
JPH04319253A (ja) * | 1991-04-16 | 1992-11-10 | Mitsubishi Electric Corp | Icカード用薄型電池 |
JPH11102675A (ja) * | 1997-09-29 | 1999-04-13 | Yuasa Corp | 薄形非水電解質電池 |
US6265102B1 (en) * | 1998-11-05 | 2001-07-24 | Electric Fuel Limited (E.F.L.) | Prismatic metal-air cells |
JP2000353503A (ja) * | 1999-06-10 | 2000-12-19 | Matsushita Electric Ind Co Ltd | 扁平形有機電解液電池及びその製造法 |
JP2001256933A (ja) * | 2000-03-10 | 2001-09-21 | Mitsubishi Chemicals Corp | 電池及び電池パック |
JP2005108790A (ja) * | 2003-10-02 | 2005-04-21 | Nissan Motor Co Ltd | 積層型電池 |
JP2009146812A (ja) * | 2007-12-17 | 2009-07-02 | Nissan Motor Co Ltd | 電池ケース及び組電池 |
Also Published As
Publication number | Publication date |
---|---|
US20170005300A1 (en) | 2017-01-05 |
CN105940545A (zh) | 2016-09-14 |
JPWO2015115080A1 (ja) | 2017-03-23 |
US9685642B2 (en) | 2017-06-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6735445B2 (ja) | 捲回型電池 | |
JP6859059B2 (ja) | リチウムイオン二次電池及びその製造方法 | |
JP4293501B2 (ja) | 電気化学デバイス | |
JP6292678B2 (ja) | 二次電池と電極の製造方法 | |
JP2012199162A (ja) | ラミネート外装体二次電池 | |
JP2011181485A (ja) | 角形電池及びその製造方法ならびにこれを用いてなる組電池 | |
JP2013187077A (ja) | 捲回型およびスタック型電極電池 | |
JPWO2015015663A1 (ja) | 二次電池 | |
JP6032628B2 (ja) | 薄型電池 | |
JP5552398B2 (ja) | リチウムイオン電池 | |
WO2011002064A1 (ja) | ラミネート形電池 | |
US10431846B2 (en) | Energy storage device | |
JP2011198742A (ja) | ラミネート形電池 | |
JP5348720B2 (ja) | 扁平形非水二次電池 | |
JP2011129446A (ja) | ラミネート形電池 | |
JP2018092830A (ja) | 二次電池、及び二次電池の製造方法 | |
JP2017059538A (ja) | 積層型電池 | |
JP2011187241A (ja) | 非水電解質二次電池 | |
WO2013047515A1 (ja) | 非水電解質二次電池 | |
JP5201557B2 (ja) | 非水電解質電池及び非水電解質電池モジュール | |
JP2010244865A (ja) | ラミネート形電池 | |
WO2017110842A1 (ja) | 非水二次電池およびその製造方法 | |
WO2015115080A1 (ja) | 密閉型蓄電池 | |
JP5334109B2 (ja) | ラミネート形電池 | |
JP2007073437A (ja) | 二次電池 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15743126 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15113312 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2015559817 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15743126 Country of ref document: EP Kind code of ref document: A1 |