CA2319062C - Method of forming protective coating on cell safety valve element, cell safety valve element coated with protective film, cell sealing plate using the element, and enclosed cell using the plate - Google Patents
Method of forming protective coating on cell safety valve element, cell safety valve element coated with protective film, cell sealing plate using the element, and enclosed cell using the plate Download PDFInfo
- Publication number
- CA2319062C CA2319062C CA002319062A CA2319062A CA2319062C CA 2319062 C CA2319062 C CA 2319062C CA 002319062 A CA002319062 A CA 002319062A CA 2319062 A CA2319062 A CA 2319062A CA 2319062 C CA2319062 C CA 2319062C
- Authority
- CA
- Canada
- Prior art keywords
- closing plate
- safety valve
- valve element
- battery
- metal substrate
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000011253 protective coating Substances 0.000 title description 2
- 230000001681 protective effect Effects 0.000 title description 2
- 238000007789 sealing Methods 0.000 title description 2
- 229910052751 metal Inorganic materials 0.000 claims abstract description 122
- 239000002184 metal Substances 0.000 claims abstract description 122
- 239000000758 substrate Substances 0.000 claims abstract description 70
- 239000011888 foil Substances 0.000 claims abstract description 46
- 239000011248 coating agent Substances 0.000 claims abstract description 24
- 238000000576 coating method Methods 0.000 claims abstract description 24
- 229920005989 resin Polymers 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 16
- 239000003792 electrolyte Substances 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 abstract description 42
- 239000003292 glue Substances 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000011255 nonaqueous electrolyte Substances 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000003115 supporting electrolyte Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910000792 Monel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
- Y10T29/49112—Electric battery cell making including laminating of indefinite length 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
- Y10T29/49115—Electric battery cell making including coating or impregnating
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The present invention provide a method of forming a protection film of a safety valve element for battery which prevents from corroding a metal portion by covering protection film on the safety valve element for battery, a closing plate for a battery using same and a closed battery using same.
A safety valve element of the present invention is composed of a safety valve element 10 comprising a metal substrate 1 having a perforated pore 4 and a metal foil 2 laminated on a metal substrate 1 so as to cover perforated pore 4 and a protection film 3 which is formed by coating an organic coating at least on one side of a safety valve element 10. Further, a closing plate puts a safety valve element to provide a protection film 3 which is coated with organic film on a closing plate 6 of battery container to provide perforation 4 which is an opening of a safety valve so as to face perforations of a metal substrate 4 and perforation of a closing plate 7 and then to glue around perforation of a closing plate 7, and a closing plate of a battery is made. Furthermore, there is closed an opening of a battery container that fixes electrode which consist of positive electrode, negative electrode and separator, and a closed battery is made.
A safety valve element of the present invention is composed of a safety valve element 10 comprising a metal substrate 1 having a perforated pore 4 and a metal foil 2 laminated on a metal substrate 1 so as to cover perforated pore 4 and a protection film 3 which is formed by coating an organic coating at least on one side of a safety valve element 10. Further, a closing plate puts a safety valve element to provide a protection film 3 which is coated with organic film on a closing plate 6 of battery container to provide perforation 4 which is an opening of a safety valve so as to face perforations of a metal substrate 4 and perforation of a closing plate 7 and then to glue around perforation of a closing plate 7, and a closing plate of a battery is made. Furthermore, there is closed an opening of a battery container that fixes electrode which consist of positive electrode, negative electrode and separator, and a closed battery is made.
Description
METHOD OF FORMING PROTECTIVE COATING ON CELL SAFETY VALVE
ELEMENT, CELL SAFETY VALVE ELEMENT COATED WITH PROTECTIVE
FILM, CELL SEALING PLATE USING THE ELEMENT, AND ENCLOSED
CELL USING THE PLATE
INDUSTRIAL FIELD
The present invention relates to a method of forming a protection film of a safety valve element, a safety valve element covered with a protection film, and a battery using same which prevents from corrosion of a metal part of a safety valve element used for bursting-proof of a closed battery.
BACKGROUND OF THE INVENTION
A closed battery using an alkali metal like lithium as a material for positive and negative electrode has been widely used in recent years. These batteries need sealed structure so that an alkali metal like lithium may not react with moisture in an atmosphere, but a completely closed structure sometimes causes a bursting of battery provoked abnormally elevated pressure in the battery when the battery is exposed to high temperature or it is inappropriately handled at the charge or discharge.
It is disclosed that a closing plate for a battery provided with a bursting-proof mechanism or a safety valve for releasing a pressure in a battery when it is abnormally elevated.
For example, Japanese Patent Laid-open Publication No.HEl-5-84025 discloses a safety valve device for a closed battery which provide a gas releasing opening in a positive electrode termi-nal constituting a closing plate for a battery and a metal foil welded for bursting-proof.
In this closing plate for a battery, when a pressure in a battery is elevated, a metal foil for bursting-proof ruptures so that a pressure releases through a gas releasing opening applied in a positive electrode terminal.
When electrolyte is filled up in a battery container, electrolyte sometimes scatters and adheres the outside of it. Especially, in case of lithium ion battery, a non-aqueous electrolyte including lithium fluoride as a supporting electrolyte is used for electrolyte.
This fluoride does not attack a metal part of a battery container and a safety valve, but it has strong corrosion so as to absorb moisture in atmosphere and to change into hydrofluoric acid.
For this reason, it is a problem that an electrolyte scatters and adhere an outside of a battery container, especially a metal a foil of a safety valve element, and that a thin metal foil is perforated by corrosion.
The present invention provides a method of forming a protection film of a safety valve element for a closed battery, a safety valve element covered by a protection film, a closing plate using same and a closed battery using same which prevents from corrosion of a metal part by covering the safety valve element for battery by a protection film.
ELEMENT, CELL SAFETY VALVE ELEMENT COATED WITH PROTECTIVE
FILM, CELL SEALING PLATE USING THE ELEMENT, AND ENCLOSED
CELL USING THE PLATE
INDUSTRIAL FIELD
The present invention relates to a method of forming a protection film of a safety valve element, a safety valve element covered with a protection film, and a battery using same which prevents from corrosion of a metal part of a safety valve element used for bursting-proof of a closed battery.
BACKGROUND OF THE INVENTION
A closed battery using an alkali metal like lithium as a material for positive and negative electrode has been widely used in recent years. These batteries need sealed structure so that an alkali metal like lithium may not react with moisture in an atmosphere, but a completely closed structure sometimes causes a bursting of battery provoked abnormally elevated pressure in the battery when the battery is exposed to high temperature or it is inappropriately handled at the charge or discharge.
It is disclosed that a closing plate for a battery provided with a bursting-proof mechanism or a safety valve for releasing a pressure in a battery when it is abnormally elevated.
For example, Japanese Patent Laid-open Publication No.HEl-5-84025 discloses a safety valve device for a closed battery which provide a gas releasing opening in a positive electrode termi-nal constituting a closing plate for a battery and a metal foil welded for bursting-proof.
In this closing plate for a battery, when a pressure in a battery is elevated, a metal foil for bursting-proof ruptures so that a pressure releases through a gas releasing opening applied in a positive electrode terminal.
When electrolyte is filled up in a battery container, electrolyte sometimes scatters and adheres the outside of it. Especially, in case of lithium ion battery, a non-aqueous electrolyte including lithium fluoride as a supporting electrolyte is used for electrolyte.
This fluoride does not attack a metal part of a battery container and a safety valve, but it has strong corrosion so as to absorb moisture in atmosphere and to change into hydrofluoric acid.
For this reason, it is a problem that an electrolyte scatters and adhere an outside of a battery container, especially a metal a foil of a safety valve element, and that a thin metal foil is perforated by corrosion.
The present invention provides a method of forming a protection film of a safety valve element for a closed battery, a safety valve element covered by a protection film, a closing plate using same and a closed battery using same which prevents from corrosion of a metal part by covering the safety valve element for battery by a protection film.
DISCLOSURE OF THE INVENTION
The present invention is a method of forming a protection film of a safety valve element for a battery, wherein an organic coating is coated on the safety valve element, the safety valve element comprising a metal substrate having a first hole extending therethrough and a metal foil laminated to said metal substrate so as to cover said first hole after said safety valve element is applied on a closing plate for a battery container having a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate of safety valve element and said second hole of said closing plate are connected through, and said metal substrate and said closing plate are adhered together so that both adhere around said second hole of said closing plate.
Further, it is a safety valve element for a battery comprising a metal substrate having a first hole extending therethrough and a metal foil laminated on said metal substrate so as to cover said first hole, wherein a protection film is covered on at least one side of said safety valve element; wherein said safety valve element is applied on a closing plate for a battery container having a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate and said second hole of said closing plate are connected through, and said metal substrate and said closing plate are adhered together so that both adhere around said second hole of said closing plate.
The present invention is a method of forming a protection film of a safety valve element for a battery, wherein an organic coating is coated on the safety valve element, the safety valve element comprising a metal substrate having a first hole extending therethrough and a metal foil laminated to said metal substrate so as to cover said first hole after said safety valve element is applied on a closing plate for a battery container having a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate of safety valve element and said second hole of said closing plate are connected through, and said metal substrate and said closing plate are adhered together so that both adhere around said second hole of said closing plate.
Further, it is a safety valve element for a battery comprising a metal substrate having a first hole extending therethrough and a metal foil laminated on said metal substrate so as to cover said first hole, wherein a protection film is covered on at least one side of said safety valve element; wherein said safety valve element is applied on a closing plate for a battery container having a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate and said second hole of said closing plate are connected through, and said metal substrate and said closing plate are adhered together so that both adhere around said second hole of said closing plate.
Further, it is a closing plate for a battery container valve, wherein a safety element for a battery comprising a metal substrate having a first hole extending therethrough and a metal foil laminated on said metal substrate so as to cover said first hole is applied on the closing plate, a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate and said second hole of said closing plate are connected through, and said metal substrate and said metal closing plate are adhered together so that both adhere around said second hole of said closing plate, and after that an organic coating is coated on said safety valve element.
Furthermore, it is a safety valve element for a battery comprising a metal substrate having a first hole extending therethrough and a metal foil laminated on said metal substrate so as to cover said first hole, wherein a protection film is covered on at least one side of said safety valve element; wherein said protection film is a continuous coated film of an organic coating; and wherein said safety valve element is applied on a closing plate for a battery container having a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate and said second hole of said closing plate are connected through, and said metal substrate and said closing plate are adhered together so that both adhere around said second hole of said closing plate.
Further, it is a safety valve element for a battery comprising a metal substrate having a first hole extending therethrough and a metal foil laminated on said metal substrate so as to cover said first hole, wherein a protection film is covered on at least one side of said safety valve element; wherein said protecting film is an uncut laminated film of an organic resin film; and wherein said safety valve element is applied on a closing plate for a battery container having a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate and said second hole of said closing plate are connected through, and said metal substrate and said closing plate are adhered together so that both adhere around said second hole of said closing plate.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is schematic sectional view showing an example of a safety valve element covered by the protection film of the present invention.
Fig. 2 is schematic sectional view showing the other example of a safety valve element covered by the protection film of the present invention.
Fig. 3 is schematic sectional view showing another example of a safety valve element covered by the protection film of the present invention.
Fig. 4 is schematic sectional view showing an example of a closing plate of a battery having a safety valve element adhered to it.
Furthermore, it is a safety valve element for a battery comprising a metal substrate having a first hole extending therethrough and a metal foil laminated on said metal substrate so as to cover said first hole, wherein a protection film is covered on at least one side of said safety valve element; wherein said protection film is a continuous coated film of an organic coating; and wherein said safety valve element is applied on a closing plate for a battery container having a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate and said second hole of said closing plate are connected through, and said metal substrate and said closing plate are adhered together so that both adhere around said second hole of said closing plate.
Further, it is a safety valve element for a battery comprising a metal substrate having a first hole extending therethrough and a metal foil laminated on said metal substrate so as to cover said first hole, wherein a protection film is covered on at least one side of said safety valve element; wherein said protecting film is an uncut laminated film of an organic resin film; and wherein said safety valve element is applied on a closing plate for a battery container having a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate and said second hole of said closing plate are connected through, and said metal substrate and said closing plate are adhered together so that both adhere around said second hole of said closing plate.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is schematic sectional view showing an example of a safety valve element covered by the protection film of the present invention.
Fig. 2 is schematic sectional view showing the other example of a safety valve element covered by the protection film of the present invention.
Fig. 3 is schematic sectional view showing another example of a safety valve element covered by the protection film of the present invention.
Fig. 4 is schematic sectional view showing an example of a closing plate of a battery having a safety valve element adhered to it.
Fig. 5 is schematic sectional view showing the other example of a closing plate of a battery having a safety valve element adhere to it.
Fig. 6 is.schematic sectional view showing another example of a closing plate of a battery having a safety valve element adhere to it.
Fig. 7 (a) is schematic sectional view showing an example of a closing plate of a battery having a safety valve element adhered to it before it is covered by a protection film.
Fig. 7(b) is schematic sectional view showing an example of a closing plate of a battery having a safety valve element adhered to it after it is covered by a protection film.
Fig. 8 is schematic sectional view showing another example of a closing plate of a battery having a safety valve element adhere to it.
BEST MODE FOR CARRYING OUT THE INVENTION
The examples of a safety valve coated with a protection film and a method of making a protection film of the present invention are now explained below with reference to drawings.
(Example 1) Fig. 1 and Fig. 2 are sectional views which show the examples of a safety valve element coated with a protection film of the pre-sent invention.
As shown in Fig. 1, a safety valve element 10 is provided with a protection film 3 formed on a metal foil 2 of a laminated board which is laminated with metal foil 2 so as to cover perforated pore 4 on one side of a metal substrate 1 having perforated pore 4 which is to be an opening of a safety valve.
Fig. 6 is.schematic sectional view showing another example of a closing plate of a battery having a safety valve element adhere to it.
Fig. 7 (a) is schematic sectional view showing an example of a closing plate of a battery having a safety valve element adhered to it before it is covered by a protection film.
Fig. 7(b) is schematic sectional view showing an example of a closing plate of a battery having a safety valve element adhered to it after it is covered by a protection film.
Fig. 8 is schematic sectional view showing another example of a closing plate of a battery having a safety valve element adhere to it.
BEST MODE FOR CARRYING OUT THE INVENTION
The examples of a safety valve coated with a protection film and a method of making a protection film of the present invention are now explained below with reference to drawings.
(Example 1) Fig. 1 and Fig. 2 are sectional views which show the examples of a safety valve element coated with a protection film of the pre-sent invention.
As shown in Fig. 1, a safety valve element 10 is provided with a protection film 3 formed on a metal foil 2 of a laminated board which is laminated with metal foil 2 so as to cover perforated pore 4 on one side of a metal substrate 1 having perforated pore 4 which is to be an opening of a safety valve.
As shown in Fig. 2, a safety valve element is provided with a protection film 3 formed on a metal substrate 1, a side wall portion of perforated pore 4 and a portion where metal foil 2 covers perforat-ed pore 4.
That is, a protection film 3 covers all around cavity which is composed of metal foil 2 and perforated pore 4 formed on a metal substrate 1 and connects with a protection film 3 covering a metal substrate 1.
As examples are shown in Fig. 1 and Fig. 2, a protection film 3 is formed at least on the whole surface to be the outside of safety valve element 10 in a battery container.
Each safety valve element 10 of the present invention is pro-duced as follows.
At first, a strip of laminate 5 is produced by laminating metal foil 2 on one side of a strip of metal substrate 1 having plural numbers of perforated pore 4 to be the opening of valve so as to cover the perforated pore 4.
Though perforated pore 4 is usually circle having a diameter of 1 to 10 mm, it may be oval having major axis of 1 to 10 mm or poly-gon having same size of the circle with said diameter.
Further, a form of perforated pore 4 can be a segment having a certain width ( for example, straight or curved slit etc.) or geo-metric pattern combined with said figures.
It is preferable that perforated pore 4 is geometrically ar-ranged in such a pattern of lattice, zigzag or a like, and pitch of each perforated pore 4 is properly selected by the required size of a safety valve material.
Perforated pore 4 can be formed from a thin cold-rolled metal sheet by usual perforating method such as punching press or etching.
Metal substrate 1 forming perforated pore 4 as mentioned above and metal foil 2 are cold-pressure-bonded in a vacuum using a method for example disclosed in Japanese Patent Laid-open Publica-tion No. HEI-1-224184.
That is, after activating a surface of a metal substrate 1 and a metal foil 2 to be laminated each other by spattering in etching chamber, they are cold-pressure-bonded using a rolling unit in a vac-uum chamber.
Thus, a strip of laminate 5 of the present invention is produced.
In an example shown in Fig. 1, a protection film 3 is formed by coating and subsequent drying or baking an organic resin coating on whole surface of a metal foil 2 of a strip of laminate 5 produced as mentioned above.
Further, a protection film 3 is formed by laminating an or-ganic resin film on whole surface of metal foil 2 of a strip of lami-nate 5.
In this way, a strip of laminate covered by protection film wherein plural numbers of perforated pore 4 formed on a metal sub-strate 1 are covered by metal foil 2 and protection film 3.
A lot of safety valve elements 10 for battery can be obtained from a strip of laminate covered by a protection film by punching in such a manner that at least one perforated pore is included in each safety valve element.
In a example shown in Fig. 2, a proteppion film 3 is formed by coating and subsequent drying or baking an organic resin coating on the whole surface of the side which is a metal substrate 1 of a strip of laminate 5, a side wall portion of perforated pore 4 formed on a metal substrate 1 and a portion where metal foil 2 covers perfo-rated pore 4.
Coating is carried out by spraying or dripping a liquid coat-ing into perforated pore.
In this way, a strip of laminate covered by a protection film wherein plural numbers of perforated pore 4 formed on metal sub-strate are covered by metal foil 2 and metal substrate 7 and a side wall portion and bottom portion of perforated pore 4 are covered by protection film 3.
A lot of safety valve elements 10 for battery can be obtained from a strip of laminate covered by protection film by punching in such a manner that at least one perforated pore is included in each safety valve element.
Said metal substrate is preferably any of steel sheet, stainless steel sheet, copper sheet and aluminum sheet.
The sheet thickness is usually 0. 03 to 0.50 mm from the point of view of strength , economy and adhesion to a closing plate for bat-tery container and 0.05 t0.10 mm is more preferable.
A safety valve element for battery of the present invention aims to operate at a low pressure 30 kgf/cmZ or less, preferably 20 kgf/cmZ or less.
Therefore, the thickness of a metal foil of the present in-vention is preferably 5 to 5 0 u m.
If the thickness is 5 m or less, it easily fractures by an impact like a fall when it is applied to a safety valve for battery or like.
That is, a protection film 3 covers all around cavity which is composed of metal foil 2 and perforated pore 4 formed on a metal substrate 1 and connects with a protection film 3 covering a metal substrate 1.
As examples are shown in Fig. 1 and Fig. 2, a protection film 3 is formed at least on the whole surface to be the outside of safety valve element 10 in a battery container.
Each safety valve element 10 of the present invention is pro-duced as follows.
At first, a strip of laminate 5 is produced by laminating metal foil 2 on one side of a strip of metal substrate 1 having plural numbers of perforated pore 4 to be the opening of valve so as to cover the perforated pore 4.
Though perforated pore 4 is usually circle having a diameter of 1 to 10 mm, it may be oval having major axis of 1 to 10 mm or poly-gon having same size of the circle with said diameter.
Further, a form of perforated pore 4 can be a segment having a certain width ( for example, straight or curved slit etc.) or geo-metric pattern combined with said figures.
It is preferable that perforated pore 4 is geometrically ar-ranged in such a pattern of lattice, zigzag or a like, and pitch of each perforated pore 4 is properly selected by the required size of a safety valve material.
Perforated pore 4 can be formed from a thin cold-rolled metal sheet by usual perforating method such as punching press or etching.
Metal substrate 1 forming perforated pore 4 as mentioned above and metal foil 2 are cold-pressure-bonded in a vacuum using a method for example disclosed in Japanese Patent Laid-open Publica-tion No. HEI-1-224184.
That is, after activating a surface of a metal substrate 1 and a metal foil 2 to be laminated each other by spattering in etching chamber, they are cold-pressure-bonded using a rolling unit in a vac-uum chamber.
Thus, a strip of laminate 5 of the present invention is produced.
In an example shown in Fig. 1, a protection film 3 is formed by coating and subsequent drying or baking an organic resin coating on whole surface of a metal foil 2 of a strip of laminate 5 produced as mentioned above.
Further, a protection film 3 is formed by laminating an or-ganic resin film on whole surface of metal foil 2 of a strip of lami-nate 5.
In this way, a strip of laminate covered by protection film wherein plural numbers of perforated pore 4 formed on a metal sub-strate 1 are covered by metal foil 2 and protection film 3.
A lot of safety valve elements 10 for battery can be obtained from a strip of laminate covered by a protection film by punching in such a manner that at least one perforated pore is included in each safety valve element.
In a example shown in Fig. 2, a proteppion film 3 is formed by coating and subsequent drying or baking an organic resin coating on the whole surface of the side which is a metal substrate 1 of a strip of laminate 5, a side wall portion of perforated pore 4 formed on a metal substrate 1 and a portion where metal foil 2 covers perfo-rated pore 4.
Coating is carried out by spraying or dripping a liquid coat-ing into perforated pore.
In this way, a strip of laminate covered by a protection film wherein plural numbers of perforated pore 4 formed on metal sub-strate are covered by metal foil 2 and metal substrate 7 and a side wall portion and bottom portion of perforated pore 4 are covered by protection film 3.
A lot of safety valve elements 10 for battery can be obtained from a strip of laminate covered by protection film by punching in such a manner that at least one perforated pore is included in each safety valve element.
Said metal substrate is preferably any of steel sheet, stainless steel sheet, copper sheet and aluminum sheet.
The sheet thickness is usually 0. 03 to 0.50 mm from the point of view of strength , economy and adhesion to a closing plate for bat-tery container and 0.05 t0.10 mm is more preferable.
A safety valve element for battery of the present invention aims to operate at a low pressure 30 kgf/cmZ or less, preferably 20 kgf/cmZ or less.
Therefore, the thickness of a metal foil of the present in-vention is preferably 5 to 5 0 u m.
If the thickness is 5 m or less, it easily fractures by an impact like a fall when it is applied to a safety valve for battery or like.
On the other hand, if the thickness is 5 0 m or more, it is not fractured by a pressure of 30 kgf/cm2 or less even when a metal having a small tensile strength is applied, but fractured only when high pressure is loaded, a battery container itself burst, fragments scatter, and electrolyte sputter out scatters, which causes damage of safety declines and disadvantage of cost.
Metal foil is preferably any of steel foil, stainless steel foil, copper foil, aluminum foil, nickel foil and nickel-iron alloy foil. -Further, it is possible to use every metal foil as long as it is stable against electrolyte which is filled in a battery container, and it is not corroded and a large amount of reacted gases is not gen-erated.
It is possible to use metal foil of zinc, lead, copper alloy such as brass, bronze, phosphor bronze, gun metal or monel, aluminum alloy such as duralumin and so on in addition to the above metal foils.
Above mentioned organic resin coating is preferably coating of fluorine contained resin, epoxy resin, vinyl resin, urethane resin, polyester resin and acrylic resin, which is coated by any of spray coating, roll coating, bar coating and brush coating and so on.
Further, said organic resin film is preferably film which is produced from any of polyolefin resin, polyester resin, polyamide resin, polycarbonate resin and poly vinyl chloride resin.
Those resin films are directly adhered to be above mentioned lami-nate by thermally melt-bonding or sticked to be it by interposing primer.
The thickness of those organic resin coating or film is pref-erably 1 to 30 m, more preferably 5 to 2 0 p m.
Metal foil is preferably any of steel foil, stainless steel foil, copper foil, aluminum foil, nickel foil and nickel-iron alloy foil. -Further, it is possible to use every metal foil as long as it is stable against electrolyte which is filled in a battery container, and it is not corroded and a large amount of reacted gases is not gen-erated.
It is possible to use metal foil of zinc, lead, copper alloy such as brass, bronze, phosphor bronze, gun metal or monel, aluminum alloy such as duralumin and so on in addition to the above metal foils.
Above mentioned organic resin coating is preferably coating of fluorine contained resin, epoxy resin, vinyl resin, urethane resin, polyester resin and acrylic resin, which is coated by any of spray coating, roll coating, bar coating and brush coating and so on.
Further, said organic resin film is preferably film which is produced from any of polyolefin resin, polyester resin, polyamide resin, polycarbonate resin and poly vinyl chloride resin.
Those resin films are directly adhered to be above mentioned lami-nate by thermally melt-bonding or sticked to be it by interposing primer.
The thickness of those organic resin coating or film is pref-erably 1 to 30 m, more preferably 5 to 2 0 p m.
If the thickness is 1 m or less, it is difficult to com-pletely coat metal foil of a coating foundation in the case of coat-ing, and it is very difficult to make film in the case of a resin film.
On the other hand, if the thickness is 3 0 u m or more, it is not frac-tured at a prescribed loading pressure but fractured only when a loading pressure exceeding the prescribed fracturing pressure is loaded, which causes damage of safety and disadvantage of cost.
(Example 2) Fig. 3 is a sectional views showing another example of a safety valve element for battery covered by a protection film of the present invention.
As shown in Fig. 3, a safety valve element 10 of the present invention can be provided with a protection film 3 in such a manner that an organic resin is dripped and dried for solidifying at portion 4a of metal foil 2 where metal foil 2 covers perforated port 4 formed on laminates composed of metal substrate 1 having perforated pore 4 which is to be the opening of safety valve covered by metal foil 2 so as to close perforated pore 4.
(Example 3) The produced safety valve element 10 of the present inven-tion is shown in Fig. 4~- Fig. 6. The perforated pore 4 of a metal substrate 1 of a safety valve element 10 and perforated pore 7 of a closing battery 6 for battery container is put together so as to over-lap both, and then a safety valve element 10 is adhered by a method of laser beam welding a round perforation 7.
Fig 4 show the case that a safety valve element having a structure shown in Fig. 1 is adhered to a closing plate for a battery container.
On the other hand, if the thickness is 3 0 u m or more, it is not frac-tured at a prescribed loading pressure but fractured only when a loading pressure exceeding the prescribed fracturing pressure is loaded, which causes damage of safety and disadvantage of cost.
(Example 2) Fig. 3 is a sectional views showing another example of a safety valve element for battery covered by a protection film of the present invention.
As shown in Fig. 3, a safety valve element 10 of the present invention can be provided with a protection film 3 in such a manner that an organic resin is dripped and dried for solidifying at portion 4a of metal foil 2 where metal foil 2 covers perforated port 4 formed on laminates composed of metal substrate 1 having perforated pore 4 which is to be the opening of safety valve covered by metal foil 2 so as to close perforated pore 4.
(Example 3) The produced safety valve element 10 of the present inven-tion is shown in Fig. 4~- Fig. 6. The perforated pore 4 of a metal substrate 1 of a safety valve element 10 and perforated pore 7 of a closing battery 6 for battery container is put together so as to over-lap both, and then a safety valve element 10 is adhered by a method of laser beam welding a round perforation 7.
Fig 4 show the case that a safety valve element having a structure shown in Fig. 1 is adhered to a closing plate for a battery container.
Fig. 5 and Fig. 6 show the case that a safety valve element having a structure shown in Fig. 2 and Fig. 3, respectively is ad-hered to a closing plate of a battery.
The method of adhering is not only said laser beam welding but also any method of adhering using adhesive such as thermosetting resin adhesive and thermoplastic resin adhesive and rubber adhesive as long as necessary adhering strength is obtained.
Though Fig. 4~-Fig. 6 show the case of adhesion that one of perforated pore 7 of a closing plate 6 for a battery and one of perfo-rated pore 4 of a metal substrate 1 of a safety valve element 10 are connected through so as to overlap both pores and then both is ad-hered, but it is possible that one of perforated pore of a closing plate 6 for a battery and plural numbers of perforated pore 4 of a metal substrate 1 of a safety valve element 10 are connected through so as to overlap both pores and then both is adhered.
Said closing plate is preferably any of the same steel sheet, stainless steel sheet, copper sheet, aluminum sheet as above men-tioned metal substrate.
Thickness of a sheet is usually 0.03 to 0.50 mm from point of view of strength, economy and easiness of adhering to a closing plate of a battery, and 0.05 to 0.10 mm is more preferable.
(Example 4) Further, as shown in Fig. 7(a) and Fig. 7(b), a closing plate for a battery container to which a safety valve element for a battery covered by a protection film of the present invention can also be produced.
After a perforated pore 4 of a metal substrate 1 of a safety valve element 10 and a perforation 7 of a closing plate 6 of a battery container is put together so as to be overlapped, both are glued by a method of a laser beam welding around a perforation 7 as shown in Fig.
7 (a) .
As shown in Fig. 7(b),there can be provided a protection film 3 consisting of an organic coating on a safety valve element of a battery which include a weld part.
Like this, because a protection film is coated on both a metal foil which blockades perforation and a naked metal part of a safety valve element welded by a laser beam, a metal part cannot be attacked in whenever corrosive electrolyte adheres.
(Example 5) Though Fig. 4~-Fig. 7 show structures of that perforated pore 4 of overlapping a perforated metal substrate 1 of a safety valve element 10 and perforation 7 of a closing plate 6 so as to put in and glue a safety valve element 10 whose diameter is equal to that of perforated pore 7 of a closing plate 6 to perforated pore 7 of a clos-ing plate 6, it is possible to pile and glue a safety valve element whose diameter is bigger than that of perforated pore 7 to a clos-ing plate 6 A closing plate of a battery which adhere a safety valve ele-ment coated with a protection film blockade a opening of said battery container which electrode support to put in with electrolyte and a closing battery of the present invention is made.
POSSIBILITY OF USE IN INDUSTRY
The present invention is a method of forming a protection film of a safety valve element of a battery and a safety valve element using it.
The method of adhering is not only said laser beam welding but also any method of adhering using adhesive such as thermosetting resin adhesive and thermoplastic resin adhesive and rubber adhesive as long as necessary adhering strength is obtained.
Though Fig. 4~-Fig. 6 show the case of adhesion that one of perforated pore 7 of a closing plate 6 for a battery and one of perfo-rated pore 4 of a metal substrate 1 of a safety valve element 10 are connected through so as to overlap both pores and then both is ad-hered, but it is possible that one of perforated pore of a closing plate 6 for a battery and plural numbers of perforated pore 4 of a metal substrate 1 of a safety valve element 10 are connected through so as to overlap both pores and then both is adhered.
Said closing plate is preferably any of the same steel sheet, stainless steel sheet, copper sheet, aluminum sheet as above men-tioned metal substrate.
Thickness of a sheet is usually 0.03 to 0.50 mm from point of view of strength, economy and easiness of adhering to a closing plate of a battery, and 0.05 to 0.10 mm is more preferable.
(Example 4) Further, as shown in Fig. 7(a) and Fig. 7(b), a closing plate for a battery container to which a safety valve element for a battery covered by a protection film of the present invention can also be produced.
After a perforated pore 4 of a metal substrate 1 of a safety valve element 10 and a perforation 7 of a closing plate 6 of a battery container is put together so as to be overlapped, both are glued by a method of a laser beam welding around a perforation 7 as shown in Fig.
7 (a) .
As shown in Fig. 7(b),there can be provided a protection film 3 consisting of an organic coating on a safety valve element of a battery which include a weld part.
Like this, because a protection film is coated on both a metal foil which blockades perforation and a naked metal part of a safety valve element welded by a laser beam, a metal part cannot be attacked in whenever corrosive electrolyte adheres.
(Example 5) Though Fig. 4~-Fig. 7 show structures of that perforated pore 4 of overlapping a perforated metal substrate 1 of a safety valve element 10 and perforation 7 of a closing plate 6 so as to put in and glue a safety valve element 10 whose diameter is equal to that of perforated pore 7 of a closing plate 6 to perforated pore 7 of a clos-ing plate 6, it is possible to pile and glue a safety valve element whose diameter is bigger than that of perforated pore 7 to a clos-ing plate 6 A closing plate of a battery which adhere a safety valve ele-ment coated with a protection film blockade a opening of said battery container which electrode support to put in with electrolyte and a closing battery of the present invention is made.
POSSIBILITY OF USE IN INDUSTRY
The present invention is a method of forming a protection film of a safety valve element of a battery and a safety valve element using it.
There is provided a protection film of safety valve element coated with an organic coating or a film of an organic resin at least one side of a safety valve element which consist of a perforated metal substrate and a metal foil laminated on said perforated sub-strate so as to blockade said perforation.
Further, the present invention is a closing plate for a closed battery characterized that the closing plate for a battery container having a perforated pore which is to be the opening of valve and the metal substrate of the sa-fety valve element for a battery are attached each other in such a manner that the perforated pore of the metal substrate and the perforated pore of the closing plate are connected through, and then both is adhered around the per-forated pore of the closing plate using adhering means.
Furthermore, the present invention is a closed battery char-acterized that an electrode comprising a positive electrode, a nega-tive electrode and a separator is packed with electrolyte into a bat-tery container and an opening portion of the battery container is closed so that the closing plate for battery is put into and fixed around inner circumference of the opening portion of the battery con-tainer.
A closed battery using a closing plate of the present inven-tion contains a lithium fluoride as a supporting electrolyte, and me-tallic materials comprising a battery container and safety valve el-ement are not corroded. But the fluoride absorbs moisture in the at-mosphere and change into hydrofluoride acid which has strong corro-sion. When non aqueous electrolyte having such a strong corrosion scatters and sticks to the outside of a battery container, a metal foil of a safety valve element, in particular, the thin metal foil is corroded and perforated. In case of the safety valve element of the present invention, since it has a protection film on the metal foil, the thin metal foil is neither corroded nor perforated.
Further, the present invention is a closing plate for a closed battery characterized that the closing plate for a battery container having a perforated pore which is to be the opening of valve and the metal substrate of the sa-fety valve element for a battery are attached each other in such a manner that the perforated pore of the metal substrate and the perforated pore of the closing plate are connected through, and then both is adhered around the per-forated pore of the closing plate using adhering means.
Furthermore, the present invention is a closed battery char-acterized that an electrode comprising a positive electrode, a nega-tive electrode and a separator is packed with electrolyte into a bat-tery container and an opening portion of the battery container is closed so that the closing plate for battery is put into and fixed around inner circumference of the opening portion of the battery con-tainer.
A closed battery using a closing plate of the present inven-tion contains a lithium fluoride as a supporting electrolyte, and me-tallic materials comprising a battery container and safety valve el-ement are not corroded. But the fluoride absorbs moisture in the at-mosphere and change into hydrofluoride acid which has strong corro-sion. When non aqueous electrolyte having such a strong corrosion scatters and sticks to the outside of a battery container, a metal foil of a safety valve element, in particular, the thin metal foil is corroded and perforated. In case of the safety valve element of the present invention, since it has a protection film on the metal foil, the thin metal foil is neither corroded nor perforated.
Claims (11)
1. A method of forming a protection film of a safety valve element for a battery, wherein an organic coating is coated on the safety valve element, the safety valve element comprising a metal substrate having a first hole extending therethrough and a metal foil laminated to said metal substrate so as to cover said first hole after said safety valve element is applied on a closing plate for a battery container having a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate of safety valve element and said second hole of said closing plate are connected through, and said metal substrate and said closing plate are adhered together so that both adhere around said second hole of said closing plate.
2. The method according to claim 1, wherein said metal substrate and said closing plate adhere together by laser beam welding.
3. A safety valve element for a battery comprising a metal substrate having a first hole extending therethrough and a metal foil laminated on said metal substrate so as to cover said first hole, wherein a protection film is covered on at least one side of said safety valve element; wherein said safety valve element is applied on a closing plate for a battery container having a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate and said second hole of said closing plate are connected through, and said metal substrate and said closing plate are adhered together so that both adhere around said second hole of said closing plate.
4. The safety valve closing plate according to claim 3, wherein said metal substrate and said closing plate adhere together by laser beam welding.
5. A closing battery, wherein an electrode comprising a positive electrode, a negative electrode and a separator is packed with electrolyte into a battery container and opening portion of said battery container is closed so that said closing plate according to claim 3 is put into and fixed around inner circumference of said opening portion of said battery container.
6. A closing plate for a battery container, wherein a safety valve element for a battery comprising a metal substrate having a first hole extending therethrough and a metal foil laminated on said metal substrate so as to cover said first hole is applied on the closing plate, a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate and said second hole of said closing plate are connected through, and said metal substrate and said metal closing plate are adhered together so that both adhere around said second hole of said closing plate, and after that an organic coating is coated on said safety valve element.
7. The closing plate according to claim 6, wherein said metal substrate and said closing plate adhere together by laser beam welding.
8. A closed battery, wherein an electrode comprising a positive electrode, a negative electrode and a separator is packed with electrolyte into a battery container and opening portion of said battery container is closed so that said closing plate for battery according to claim 7 is put into and fixed around inner circumference of said opening portion of said battery container.
9. A closed battery, wherein an electrode comprising a positive electrode, a negative electrode and a separator is packed with electrolyte into a battery container and opening portion of said battery container is closed so that said closing plate for battery according to claim 6 is put into and fixed around inner circumference of said opening portion of said battery container.
10. A safety valve element for a battery comprising a metal substrate having a first hole extending therethrough and a metal foil laminated on said metal substrate so as to cover said first hole, wherein a protection film is covered on at least one side of said safety valve element; wherein said protection film is a continuous coated film of an organic coating; and wherein said safety valve element is applied on a closing plate for a battery container having a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate and said second hole of said closing plate are connected through, and said metal substrate and said closing plate are adhered together so that both adhere around said second hole of said closing plate.
11. A safety valve element for a battery comprising a metal substrate having a first hole extending therethrough and a metal foil laminated on said metal substrate so as to cover said first hole, wherein a protection film is covered on at least one side of said safety valve element; wherein said protecting film is an uncut laminated film of an organic resin film; and wherein said safety valve element is applied on a closing plate for a battery container having a second hole extending through said closing plate which is to be a valve opening of a safety valve so that said first hole of said metal substrate and said second hole of said closing plate are connected through, and said metal substrate and said closing plate are adhered together so that both adhere around said second hole of said closing plate.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3537198 | 1998-02-03 | ||
| JP10/35371 | 1998-02-03 | ||
| PCT/JP1999/000393 WO1999040637A1 (en) | 1998-02-03 | 1999-01-29 | Method of forming protective coating on cell safety valve element, cell safety valve element coated with protective film, cell sealing plate using the element, and enclosed cell using the plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2319062A1 CA2319062A1 (en) | 1999-08-12 |
| CA2319062C true CA2319062C (en) | 2007-07-10 |
Family
ID=12440050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002319062A Expired - Fee Related CA2319062C (en) | 1998-02-03 | 1999-01-29 | Method of forming protective coating on cell safety valve element, cell safety valve element coated with protective film, cell sealing plate using the element, and enclosed cell using the plate |
Country Status (9)
| Country | Link |
|---|---|
| US (2) | US6818342B1 (en) |
| EP (1) | EP1052709A4 (en) |
| KR (1) | KR20010040583A (en) |
| CN (2) | CN1159779C (en) |
| AU (1) | AU2185399A (en) |
| CA (1) | CA2319062C (en) |
| MY (1) | MY122324A (en) |
| TW (1) | TW506152B (en) |
| WO (1) | WO1999040637A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW463404B (en) * | 1999-05-24 | 2001-11-11 | Toyo Kohan Co Ltd | Forming method of protection coating for battery safety valve element, battery safety valve element with protection coating coated, battery sealed plate using the battery safety valve element and closed type battery using battery sealed plate |
| CN1277330C (en) * | 1999-08-10 | 2006-09-27 | 三洋电机株式会社 | Non-aqueous electrolyte secondary battery and its mfg. method |
| JP2002358949A (en) * | 2001-05-30 | 2002-12-13 | Nec Tokin Corp | Battery manufacturing method |
| KR100599748B1 (en) * | 2004-06-23 | 2006-07-12 | 삼성에스디아이 주식회사 | Cap assembly of secondary battery and secondary battery and safety valve installation method |
| US20090029238A1 (en) * | 2007-07-25 | 2009-01-29 | Schubert Mark A | Electrochemical cell having polymeric moisture barrier |
| CN101901886B (en) * | 2010-07-15 | 2013-06-12 | 东莞新能源电子科技有限公司 | Power battery explosion-proof device |
| DE102010039976A1 (en) * | 2010-08-31 | 2012-03-01 | Sb Limotive Company Ltd. | Battery with a protection of neighboring cells when blowing off a battery cell |
| JP5352571B2 (en) | 2010-12-15 | 2013-11-27 | トヨタ自動車株式会社 | Power storage device |
| CN102104118B (en) * | 2011-01-14 | 2013-01-30 | 深圳市科达利实业股份有限公司 | Sealing plate of high capacity and power lithium battery |
| DE102014202348A1 (en) | 2014-02-10 | 2015-08-13 | Robert Bosch Gmbh | Apparatus and method for increasing safety in the use of battery systems |
| CN105552253B (en) * | 2016-01-31 | 2018-03-27 | 宜兴市惠华复合材料有限公司 | The anti-explosion valve structure and its processing technology of a kind of lithium battery |
| WO2022217580A1 (en) * | 2021-04-16 | 2022-10-20 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, powered device, and method and device for preparing battery cell |
| DE102021129752A1 (en) * | 2021-11-15 | 2023-05-17 | Mann+Hummel Gmbh | Degassing unit, membrane, housing, in particular battery housing, and manufacturing method of a membrane |
| DE102022108797A1 (en) | 2022-04-11 | 2023-10-12 | Volkswagen Aktiengesellschaft | Battery with bursting element |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3994749A (en) * | 1975-08-21 | 1976-11-30 | Motorola, Inc. | Vent valve for nickel-cadmium energy cells |
| JPH02284349A (en) * | 1989-04-25 | 1990-11-21 | Matsushita Electric Ind Co Ltd | organic electrolyte battery |
| JPH03131050A (en) | 1989-10-17 | 1991-06-04 | Seiko Epson Corp | Wafer synthesis separation mechanism and wafer transfer device |
| JPH03131050U (en) * | 1990-04-16 | 1991-12-27 | ||
| JPH0584025U (en) | 1992-04-20 | 1993-11-12 | 日本電池株式会社 | Safety valve device for organic electrolyte battery |
| JP3233679B2 (en) * | 1992-05-14 | 2001-11-26 | 旭化成株式会社 | Manufacturing method of battery safety valve device |
| JP3131050B2 (en) | 1992-10-20 | 2001-01-31 | 熊本製粉株式会社 | Baking method |
| JPH0729557A (en) * | 1993-07-12 | 1995-01-31 | Fuji Photo Film Co Ltd | Nonaqueous battery |
| KR100202928B1 (en) * | 1996-03-30 | 1999-06-15 | 전주범 | Safety Device for Organic Electrolyte Battery |
| JPH09293490A (en) * | 1996-04-25 | 1997-11-11 | Seiko Instr Kk | Sealed battery and manufacturing method thereof |
| TW369737B (en) * | 1997-06-05 | 1999-09-11 | Toyo Kohan Co Ltd | A closing plate of a battery covered with a protection film and a battery using same |
| US6001504A (en) * | 1998-03-11 | 1999-12-14 | Duracell Inc. | Prismatic battery housing |
| AU770727B2 (en) * | 1999-10-18 | 2004-02-26 | Dial Corporation, The | Apparatus and method for forming casingless sausages |
-
1999
- 1999-01-22 MY MYPI99000238A patent/MY122324A/en unknown
- 1999-01-26 TW TW088101141A patent/TW506152B/en not_active IP Right Cessation
- 1999-01-29 WO PCT/JP1999/000393 patent/WO1999040637A1/en not_active Ceased
- 1999-01-29 KR KR1020007008452A patent/KR20010040583A/en not_active Ceased
- 1999-01-29 US US09/601,474 patent/US6818342B1/en not_active Expired - Fee Related
- 1999-01-29 AU AU21853/99A patent/AU2185399A/en not_active Abandoned
- 1999-01-29 CN CNB998026336A patent/CN1159779C/en not_active Expired - Fee Related
- 1999-01-29 CA CA002319062A patent/CA2319062C/en not_active Expired - Fee Related
- 1999-01-29 CN CNA2003101205354A patent/CN1516298A/en active Pending
- 1999-01-29 EP EP99901918A patent/EP1052709A4/en not_active Withdrawn
-
2004
- 2004-10-21 US US10/969,178 patent/US20050084743A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP1052709A4 (en) | 2004-07-14 |
| WO1999040637A1 (en) | 1999-08-12 |
| EP1052709A1 (en) | 2000-11-15 |
| KR20010040583A (en) | 2001-05-15 |
| CA2319062A1 (en) | 1999-08-12 |
| TW506152B (en) | 2002-10-11 |
| CN1159779C (en) | 2004-07-28 |
| US20050084743A1 (en) | 2005-04-21 |
| US6818342B1 (en) | 2004-11-16 |
| CN1516298A (en) | 2004-07-28 |
| MY122324A (en) | 2006-04-29 |
| CN1289460A (en) | 2001-03-28 |
| AU2185399A (en) | 1999-08-23 |
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