TWI620367B - Sealing body - Google Patents
Sealing body Download PDFInfo
- Publication number
- TWI620367B TWI620367B TW103105425A TW103105425A TWI620367B TW I620367 B TWI620367 B TW I620367B TW 103105425 A TW103105425 A TW 103105425A TW 103105425 A TW103105425 A TW 103105425A TW I620367 B TWI620367 B TW I620367B
- Authority
- TW
- Taiwan
- Prior art keywords
- conductive metal
- sealing body
- positive electrode
- metal foil
- electrode cover
- Prior art date
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 60
- 229910052751 metal Inorganic materials 0.000 claims abstract description 99
- 239000002184 metal Substances 0.000 claims abstract description 99
- 239000011888 foil Substances 0.000 claims abstract description 48
- 230000001681 protective effect Effects 0.000 claims abstract description 21
- 238000002788 crimping Methods 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 16
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 229910001416 lithium ion Inorganic materials 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 229910001152 Bi alloy Inorganic materials 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052718 tin Inorganic materials 0.000 claims description 5
- JWVAUCBYEDDGAD-UHFFFAOYSA-N bismuth tin Chemical compound [Sn].[Bi] JWVAUCBYEDDGAD-UHFFFAOYSA-N 0.000 claims description 4
- 229910000597 tin-copper alloy Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000010410 layer Substances 0.000 description 46
- 230000006870 function Effects 0.000 description 19
- -1 polyethylene Polymers 0.000 description 8
- 229910000846 In alloy Inorganic materials 0.000 description 5
- 229910001245 Sb alloy Inorganic materials 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 239000002140 antimony alloy Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 229910001316 Ag alloy Inorganic materials 0.000 description 4
- 229910000990 Ni alloy Inorganic materials 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 229910000531 Co alloy Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 229910001297 Zn alloy Inorganic materials 0.000 description 3
- QCEUXSAXTBNJGO-UHFFFAOYSA-N [Ag].[Sn] Chemical compound [Ag].[Sn] QCEUXSAXTBNJGO-UHFFFAOYSA-N 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 3
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- GZCWPZJOEIAXRU-UHFFFAOYSA-N tin zinc Chemical compound [Zn].[Sn] GZCWPZJOEIAXRU-UHFFFAOYSA-N 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910001020 Au alloy Inorganic materials 0.000 description 2
- 229910000521 B alloy Inorganic materials 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 229910000927 Ge alloy Inorganic materials 0.000 description 2
- 229910001096 P alloy Inorganic materials 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- HSGAUFABPUECSS-UHFFFAOYSA-N [Ag][Cu][Sn][Bi] Chemical compound [Ag][Cu][Sn][Bi] HSGAUFABPUECSS-UHFFFAOYSA-N 0.000 description 2
- QKAJPFXKNNXMIZ-UHFFFAOYSA-N [Bi].[Ag].[Sn] Chemical compound [Bi].[Ag].[Sn] QKAJPFXKNNXMIZ-UHFFFAOYSA-N 0.000 description 2
- OCLKPXHVYJLJFK-UHFFFAOYSA-N [Bi].[Ag].[Sn].[In].[Cu] Chemical compound [Bi].[Ag].[Sn].[In].[Cu] OCLKPXHVYJLJFK-UHFFFAOYSA-N 0.000 description 2
- QLTBJHSQPNVBLW-UHFFFAOYSA-N [Bi].[In].[Ag].[Sn] Chemical compound [Bi].[In].[Ag].[Sn] QLTBJHSQPNVBLW-UHFFFAOYSA-N 0.000 description 2
- QKBIOXTWJNWNFP-UHFFFAOYSA-N [Co].[Ni].[Ag].[Sn] Chemical compound [Co].[Ni].[Ag].[Sn] QKBIOXTWJNWNFP-UHFFFAOYSA-N 0.000 description 2
- PQIJHIWFHSVPMH-UHFFFAOYSA-N [Cu].[Ag].[Sn] Chemical compound [Cu].[Ag].[Sn] PQIJHIWFHSVPMH-UHFFFAOYSA-N 0.000 description 2
- XUFUDVIAKKOUOK-UHFFFAOYSA-N [Cu].[Sb].[Ag].[Sn] Chemical compound [Cu].[Sb].[Ag].[Sn] XUFUDVIAKKOUOK-UHFFFAOYSA-N 0.000 description 2
- VRUVRQYVUDCDMT-UHFFFAOYSA-N [Sn].[Ni].[Cu] Chemical compound [Sn].[Ni].[Cu] VRUVRQYVUDCDMT-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- GVFOJDIFWSDNOY-UHFFFAOYSA-N antimony tin Chemical compound [Sn].[Sb] GVFOJDIFWSDNOY-UHFFFAOYSA-N 0.000 description 2
- QDWJUBJKEHXSMT-UHFFFAOYSA-N boranylidynenickel Chemical compound [Ni]#B QDWJUBJKEHXSMT-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 239000002001 electrolyte material Substances 0.000 description 2
- 239000003353 gold alloy Substances 0.000 description 2
- MSNOMDLPLDYDME-UHFFFAOYSA-N gold nickel Chemical compound [Ni].[Au] MSNOMDLPLDYDME-UHFFFAOYSA-N 0.000 description 2
- 229910052741 iridium Inorganic materials 0.000 description 2
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- OFNHPGDEEMZPFG-UHFFFAOYSA-N phosphanylidynenickel Chemical compound [P].[Ni] OFNHPGDEEMZPFG-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229910052703 rhodium Inorganic materials 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910000969 tin-silver-copper Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910001313 Cobalt-iron alloy Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- YYCSKJOSJKKVRG-UHFFFAOYSA-N [Co].[Ni].[Cu].[Sn].[Ag] Chemical compound [Co].[Ni].[Cu].[Sn].[Ag] YYCSKJOSJKKVRG-UHFFFAOYSA-N 0.000 description 1
- HSSJULAPNNGXFW-UHFFFAOYSA-N [Co].[Zn] Chemical compound [Co].[Zn] HSSJULAPNNGXFW-UHFFFAOYSA-N 0.000 description 1
- VDGMIGHRDCJLMN-UHFFFAOYSA-N [Cu].[Co].[Ni] Chemical compound [Cu].[Co].[Ni] VDGMIGHRDCJLMN-UHFFFAOYSA-N 0.000 description 1
- PHCDZUPEIPGYOG-UHFFFAOYSA-N [Fe].[Co].[Zn] Chemical compound [Fe].[Co].[Zn] PHCDZUPEIPGYOG-UHFFFAOYSA-N 0.000 description 1
- FXYGHKTWVGLQJG-UHFFFAOYSA-N [Sb].[Cu].[Sn] Chemical compound [Sb].[Cu].[Sn] FXYGHKTWVGLQJG-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 description 1
- NNIPDXPTJYIMKW-UHFFFAOYSA-N iron tin Chemical compound [Fe].[Sn] NNIPDXPTJYIMKW-UHFFFAOYSA-N 0.000 description 1
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- CLDVQCMGOSGNIW-UHFFFAOYSA-N nickel tin Chemical compound [Ni].[Sn] CLDVQCMGOSGNIW-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000011135 tin Substances 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
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
-
- 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
-
- 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
- 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
- H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
-
- 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
- H01M50/148—Lids or covers characterised by their shape
- H01M50/153—Lids or covers characterised by their shape for button or coin cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/0241—Structural association of a fuse and another component or apparatus
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Fuses (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
本發明提供一種製造容易，並可更小型化之密閉型電池用的封口體。密閉型電池用之封口體具有：(1)具有壓接部及排氣口之第一正極蓋；(2)位於第一正極蓋上之導電性金屬箔；(3)位於導電性金屬箔上，具有保險絲功能之保護元件；及(4)位於保護元件上，具有排氣口之第二正極蓋；並藉由上述第一正極蓋之壓接部將上述導電性金屬箔、上述保護元件及上述第二正極蓋加以壓接。 The present invention provides a sealing body for a sealed battery which is easy to manufacture and can be made more compact. The sealing body for a sealed battery has: (1) a first positive electrode cover having a crimping portion and an exhaust port; (2) a conductive metal foil on the first positive electrode cover; (3) a conductive metal foil , A protective element with a fuse function; and (4) a second positive electrode cover on the protective element, which has an exhaust port; and the conductive metal foil, the protective element, and The second positive electrode cover is crimped.
Description
本發明係關於一種密閉型電池用之封口體。 The invention relates to a sealing body for a sealed battery.
鋰離子電池因為具有能量密度高、工作電壓高、放電時電壓平坦性優異、自放電少、無記憶效應等優點，所以適合用作例如行動電話、個人電腦、攝影機等之電源。但是，鋰離子電池等其電解液包含有機溶劑之二次電池存在因過充電、內部短路等異常、或使用錯誤等造成電解液被分解，電池內部產生氣體、及電池內壓上升等問題。 Lithium-ion batteries have advantages such as high energy density, high operating voltage, excellent voltage flatness during discharge, low self-discharge, and no memory effect, so they are suitable for use as power supplies for mobile phones, personal computers, and video cameras. However, secondary batteries, such as lithium ion batteries, in which the electrolyte contains an organic solvent, have problems such as overcharging, internal short circuits, or use errors that cause the electrolyte to decompose, generate gas inside the battery, and increase the internal pressure of the battery.
針對此種問題，例如專利文獻1中揭示有一種密閉型電池，如第一圖所示，其具有由：具有排氣孔之閥蓋102；經由內部墊片(gasket)104而位於其上之防爆閥106；位於其上之PTC(positive temperature coefficient)元件108、及具有位於其上之排氣孔的正極端子110構成之封口體100。具有該封口體之密閉型電池，當電池內壓超過設定值時，防爆閥106工作，藉由將氣體排出電池外部，以防止電池之內壓上升。 In response to such a problem, for example, Patent Document 1 discloses a closed-type battery, as shown in the first figure, which has: a valve cover 102 having a vent hole; Explosion-proof valve 106; a sealing body 100 composed of a PTC (positive temperature coefficient) element 108 thereon and a positive terminal 110 having an exhaust hole thereon. In the sealed battery having the sealing body, when the internal pressure of the battery exceeds a set value, the explosion-proof valve 106 operates to prevent the internal pressure of the battery from increasing by discharging gas to the outside of the battery.
[專利文獻1]日本特開平11-283588號公報 [Patent Document 1] Japanese Patent Application Laid-Open No. 11-283588
但是，上述之封口體，因為正常時防爆閥成為電流之路徑，為了使防爆閥106與閥蓋102之電性連接確實，兩者需要在此等部件之連接部位112焊接。因此，製造封口體時需要焊接工序，而有製造工序繁雜的問題。 However, because the explosion-proof valve is a path of electric current under normal conditions, in order to ensure the electrical connection between the explosion-proof valve 106 and the valve cover 102, the two need to be welded at the connection portion 112 of these components. Therefore, a welding process is required when manufacturing the sealing body, and there is a problem that the manufacturing process is complicated.
此外，PTC元件在發生異常時工作(跳開)而成為高電阻，雖可遮斷流經此之電流，不過在工作後仍有微少電流(洩漏電流)流過。但是，依異常的種類，有時要求電路完全斷開。因此，過去的封口體為了遮斷該微小電流，係在防爆閥中附加作為電流遮斷機構(CID：Current Interrupt Device)之功能。因而，上述封口體100在防爆閥工作後，為了可遮斷閥蓋102與防爆閥106之電性連接，而在閥蓋102與防爆閥106的凸緣部之間設置絕緣性之內部墊片104。因此，有整個封口體之厚度增厚了墊片部分的問題。此外，因為零件數量多，各個零件固有之尺寸(厚度)變動的影響大，藉由壓接亦有施加於PTC元件之負載壓力不穩定，PTC元件之耐電壓特性降低的問題。 In addition, the PTC device operates (jumps out) to become a high resistance when an abnormality occurs, and although the current flowing therethrough can be interrupted, a slight current (leakage current) flows after the operation. However, depending on the type of abnormality, the circuit may be required to be completely disconnected. Therefore, in order to block the minute current in the past, the sealing body has added a function as a current interrupting device (CID: Current Interrupt Device) to the explosion-proof valve. Therefore, after the above-mentioned sealing body 100 is operated, in order to block the electrical connection between the valve cover 102 and the explosion-proof valve 106, an insulating internal gasket is provided between the valve cover 102 and the flange portion of the explosion-proof valve 106. 104. Therefore, there is a problem that the thickness of the entire sealing body becomes thicker in the gasket portion. In addition, because of the large number of parts, the inherent size (thickness) variation of each part has a large effect. There is also a problem that the pressure applied to the PTC element is unstable by crimping, and the withstand voltage characteristics of the PTC element are reduced.
此外，因為防爆閥兼具作為防爆閥之功能與作為電流遮斷機構之功能，所以亦有防爆閥之形狀及構造複雜，防爆閥本身加工繁雜之問題。 In addition, because the explosion-proof valve has both the function of an explosion-proof valve and the function of a current interrupting mechanism, there are also problems in that the shape and structure of the explosion-proof valve are complicated, and the processing of the explosion-proof valve is complicated.
因此，本發明欲解決上述問題之課題為：提供一種製造容易，並可更小型化之密閉型電池用的封口體。 Therefore, the problem to be solved by the present invention is to provide a sealing body for a sealed battery which is easy to manufacture and can be made more compact.
第一要旨中，本發明提供一種密閉型電池用之封口體，其特徵為具有： (1)第一正極蓋，其係具有壓接部及排氣口；(2)導電性金屬箔，其係位於第一正極蓋上；(3)保護元件，其係位於導電性金屬箔上，並具有保險絲功能(fuse function)；及(4)第二正極蓋，其係位於保護元件上，並具有排氣口；藉由上述第一正極蓋之壓接部固定上述導電性金屬箔、上述保護元件及上述第二正極蓋。 In a first gist, the present invention provides a sealing body for a sealed battery, which is characterized by: (1) the first positive electrode cover, which has a crimping portion and an exhaust port; (2) a conductive metal foil, which is located on the first positive electrode cover; (3) a protective element, which is located on the conductive metal foil And has a fuse function; and (4) a second positive electrode cover, which is located on the protection element and has an exhaust port; the conductive metal foil is fixed by the crimping part of the first positive electrode cover, The protection element and the second positive electrode cover.
本發明之封口體中，由於上述(3)之具有保險絲功能的保護元件發揮電流遮斷機構之功能，因此導電性金屬箔只須發揮防爆閥之功能即可。因此，導電性金屬箔不需要複雜之形狀及構造。此外，無須確保導電性金屬箔之凸緣部與第一正極蓋之絕緣。因此，導電性金屬箔與第一正極蓋之間無須配置絕緣性墊片。再者，導電性金屬箔與第一正極蓋之電性連接，除了兩者以面接觸之外，藉由第一正極蓋之壓接部的擠壓而確實，所以不需要焊接導電性金屬箔與第一正極蓋。 In the sealing body of the present invention, since the protective element with a fuse function of the above (3) functions as a current interrupting mechanism, the conductive metal foil only needs to function as an explosion-proof valve. Therefore, the conductive metal foil does not need a complicated shape and structure. In addition, it is not necessary to ensure insulation between the flange portion of the conductive metal foil and the first positive electrode cover. Therefore, there is no need to arrange an insulating gasket between the conductive metal foil and the first positive electrode cover. In addition, the electrical connection between the conductive metal foil and the first positive electrode cover is ensured by the pressing of the crimping portion of the first positive electrode cover except that the two are in surface contact, so it is not necessary to weld the conductive metal foil. With the first positive cover.
第二要旨中，本發明提供一種密閉型電池，其具有本發明之封口體。 In a second gist, the present invention provides a sealed battery having the sealing body of the present invention.
本發明之封口體藉由將具有保險絲功能之保護元件用作電流遮斷機構，可將作為防爆閥之導電性金屬箔的形狀及構造單純化，此外，不需要焊接導電性金屬箔與第一正極蓋。藉此，可簡化封口體之製造。再者，可提供更小型之封口體。 The sealing body of the present invention can simplify the shape and structure of the conductive metal foil used as an explosion-proof valve by using a protective element having a fuse function as a current interruption mechanism. In addition, it is not necessary to weld the conductive metal foil to the first Positive cover. Thereby, the manufacturing of the sealing body can be simplified. Furthermore, a smaller sealing body can be provided.
10‧‧‧封口體 10‧‧‧ sealing body
12‧‧‧第一正極蓋 12‧‧‧First positive cover
14‧‧‧導電性金屬箔 14‧‧‧ conductive metal foil
16‧‧‧保護元件 16‧‧‧Protection element
18‧‧‧第二正極蓋 18‧‧‧Second positive cover
20‧‧‧凸緣部 20‧‧‧ flange
22‧‧‧絕緣性墊片 22‧‧‧Insulating gasket
24‧‧‧壓接部 24‧‧‧ Crimping Department
26‧‧‧排氣口 26‧‧‧ exhaust port
28‧‧‧排氣口 28‧‧‧ exhaust port
100‧‧‧封口體 100‧‧‧ sealing body
102‧‧‧閥蓋 102‧‧‧Valve cover
104‧‧‧內部墊片 104‧‧‧Inner gasket
106‧‧‧防爆閥 106‧‧‧ Explosion-proof valve
108‧‧‧PTC元件 108‧‧‧PTC components
110‧‧‧正極端子 110‧‧‧Positive terminal
112‧‧‧連接部位 112‧‧‧Connection site
第一圖係以剖面圖概略顯示過去密閉型電池用之封口體。 The first figure is a sectional view schematically showing a sealing body for a conventional sealed battery.
第二圖係以剖面圖概略顯示本發明之密閉型電池用封口體的1個樣態。 The second figure is a sectional view schematically showing one aspect of the sealing body for a sealed battery of the present invention.
第三圖係以俯視圖概略顯示第二圖之封口體。 The third figure is a schematic plan view of the sealing body of the second figure.
以下，參照圖式詳細說明本發明之封口體。但是，注意本發明之封口體不限定於圖示的樣態。 Hereinafter, the sealing body of the present invention will be described in detail with reference to the drawings. Note, however, that the sealing body of the present invention is not limited to the illustrated form.
將本發明之封口體的1個樣態，在第二圖中以沿著其厚度方向之剖面圖概略顯示，在第三圖中以俯視圖概略顯示。 One aspect of the sealing body of the present invention is schematically shown in a sectional view along the thickness direction in the second figure, and is schematically shown in a top view in the third figure.
圖示之封口體10係圓筒型電池用的封口體，且在第一正極蓋12上依序疊層有導電性金屬箔14、具有保險絲功能之保護元件16及第二正極蓋18，且具有位於此等部件周圍及第二正極蓋18之凸緣部(外緣部)20上的絕緣性墊片22，此等部件藉由位於第一正極蓋12之緣部的壓接部24固定。 The illustrated sealing body 10 is a sealing body for a cylindrical battery, and a conductive metal foil 14, a protective element 16 having a fuse function, and a second positive electrode cover 18 are sequentially laminated on the first positive electrode cover 12, and The insulating gasket 22 is provided around these components and on the flange portion (outer edge portion) 20 of the second positive electrode cover 18, and these components are fixed by the crimping portion 24 located on the edge portion of the first positive electrode cover 12. .
圖示之樣態係第一正極蓋12在其中央部具有排氣口26。該排氣口26係為了藉由電解液及/或活性物質等之異常反應，在電池內部產生氣體，電池內壓上升而防爆閥工作時，將氣體排出電池外部而設。因此，在排氣口26之正上方不宜存在具有保險絲功能之保護元件。此外，第一正極蓋12具有壓接部24，在第一正極蓋12上將構成封口體之其他部材設置於指定位置後，藉由將該壓接部24向內側彎曲來固定其他部件。 The aspect shown in the figure is that the first positive electrode cover 12 has an exhaust port 26 in a central portion thereof. The exhaust port 26 is provided to generate gas inside the battery due to an abnormal reaction of the electrolyte and / or active material, etc., and when the internal pressure of the battery rises and the explosion-proof valve operates, the gas is discharged to the outside of the battery. Therefore, there should not be a protective element with a fuse function directly above the exhaust port 26. In addition, the first positive electrode cover 12 has a crimping portion 24. After other members constituting the sealing body are provided at a predetermined position on the first positive electrode cover 12, other components are fixed by bending the crimping portion 24 inward.
本發明中，第一正極蓋由導電性金屬形成。該導電性金屬並無特別限定，例如封口體係用於鋰離子電池時，宜為鋁或鋁合金。 In the present invention, the first positive electrode cover is formed of a conductive metal. The conductive metal is not particularly limited. For example, when the sealing system is used in a lithium ion battery, aluminum or an aluminum alloy is preferred.
圖示之樣態，導電性金屬箔14係圓盤狀之金屬箔，且發揮防爆閥之功能。此外，正常時，導電性金屬箔14防止電解液經由排氣口而漏出電池外部。 As shown in the figure, the conductive metal foil 14 is a disc-shaped metal foil and functions as an explosion-proof valve. In addition, during normal times, the conductive metal foil 14 prevents the electrolytic solution from leaking out of the battery through the exhaust port.
本發明中，形成導電性金屬箔14之金屬材料並無特別限定，只要係對電解液具有耐腐蝕性者即可，例如封口體係用於鋰離子電池時，宜為鋁或鋁合金。 In the present invention, the metal material forming the conductive metal foil 14 is not particularly limited as long as it has corrosion resistance to the electrolytic solution. For example, when the sealing system is used in a lithium ion battery, aluminum or an aluminum alloy is preferred.
上述導電性金屬箔之厚度並無特別限定，只要係可發揮防爆閥之功能的厚度即可。熟悉本技術者可以負載希望之壓力(一般而言為10~15kgf)時防爆閥工作(破裂)的方式，依封口體之構成，特別是保護元件之內徑，適切決定上述導電性金屬箔之厚度。 The thickness of the conductive metal foil is not particularly limited as long as it is a thickness that can function as an explosion-proof valve. Those skilled in the art can work (break) the explosion-proof valve when the desired pressure is applied (generally 10 ~ 15kgf). Depending on the structure of the sealing body, especially the inner diameter of the protective element, the appropriate determination of the conductive metal foil thickness.
上述導電性金屬箔可藉由一般金屬箔之製造方法，例如藉由壓延而輕易製造。 The above-mentioned conductive metal foil can be easily manufactured by a general metal foil manufacturing method, for example, by rolling.
本發明中，具有保險絲功能之保護元件者，係在封口體中流入過剩電流時熔斷，可遮斷其過剩電流之具有非恢復型的保險絲功能之保護元件。 In the present invention, a protection element with a fuse function is a protection element with a non-recovery fuse function that can be fused when an excess current flows in the sealing body, and the excess current can be interrupted.
圖示之樣態，保護元件16係圓環狀，且係具有：(i)藉由絕緣性樹脂而形成，至少具有1個貫穿開口部之層狀要素；(ii)位於層狀要素各主表面上之導電性金屬薄層電極；及(iii)位於界定該貫穿開口部之至少1個之側面上，並電性連接導電性金屬薄層電極之保險層(fuse layer)；而構成的保護元件(碟型保護元件)。另外，圖示之樣態為求簡化，而省略位於保險層及層狀要素各主表面上之導電性金屬薄層電極的圖示， 而圖示作為全體之保護元件16。該碟型保護元件例如揭示於國際公開第2012/118153號(包含圖示於圖式之保護元件及其製造方法的全部揭示內容，以參照之方式納入本說明書中)。 As shown in the figure, the protective element 16 is ring-shaped and has: (i) a layered element formed of an insulating resin and having at least one layered element penetrating the opening; (ii) each of the main elements of the layered element A conductive metal thin layer electrode on the surface; and (iii) a protective layer formed on a side surface defining at least one of the through openings and electrically connected to the conductive metal thin layer electrode; Components (disc-shaped protection components). In addition, the state of the illustration is simplified, and the illustration of the conductive metal thin layer electrode located on each main surface of the fuse layer and the layered element is omitted. The illustration is as the whole protection element 16. This dish-shaped protective element is disclosed, for example, in International Publication No. 2012/118153 (the entire disclosure of the protective element and its manufacturing method shown in the drawings is incorporated into this specification by reference).
上述藉由絕緣性樹脂所形成之層狀要素至少具有1個貫穿開口部。該貫穿開口部沿著層狀要素之厚度方向延伸而貫穿層狀要素，當電池內部產生氣體，而防爆閥工作時，以可將電池內部產生之氣體排出電池外部的方式，而與第一正極蓋之排氣口26及第二正極蓋之排氣口28氣體連通。該貫穿開口部之位置及數量並無特別限定，亦可在層狀要素之中心部設置1個，此外，亦可在具有中心貫穿開口部之圓環狀的層狀要素周狀部分設置複數個，例如設2個、3個或4個。 The layered element formed by the insulating resin described above has at least one penetrating opening. The penetrating opening portion extends through the layered element along the thickness direction of the layered element. When gas is generated inside the battery and the explosion-proof valve is operated, the through-opening is connected to the first positive electrode in such a manner that the gas generated inside the battery can be discharged to the outside of the battery. The exhaust port 26 of the cover and the exhaust port 28 of the second positive electrode cover are in gas communication. The position and number of the through-openings are not particularly limited, and one may be provided at the center of the layered element, and a plurality of round-shaped layered elements having a central through-opening may be provided around the peripheral portion of the layered element. , Such as 2, 3, or 4.
構成層狀要素之絕緣性樹脂並無特別限定，只要是具有電性絕緣性之樹脂即可。例如可例示：聚乙烯、聚丙烯、聚碳酸酯、氟系樹脂、ABS(acrylonitrile-butadiene-styrene)樹脂、聚碳酸酯-ABS合金樹脂、PBT(polybutylene terephthalate)樹脂、彈性體(elastomer)等之樹脂。特別宜使用如聚乙烯或聚氟化亞乙烯之樹脂。 The insulating resin constituting the layered element is not particularly limited as long as it is a resin having electrical insulation. Examples include polyethylene, polypropylene, polycarbonate, fluororesin, ABS (acrylonitrile-butadiene-styrene) resin, polycarbonate-ABS alloy resin, PBT (polybutylene terephthalate) resin, and elastomer (elastomer). Resin. Particularly preferred are resins such as polyethylene or polyvinylidene fluoride.
該層狀要素具有配置於其兩側主表面上之導電性金屬薄層電極而構成。該導電性金屬薄層電極並無特別限定，只要是具有導電性之金屬薄層(例如厚度為0.1μm~100μm程度)即可，例如可藉由銅、鎳、鋁、金等金屬構成，亦可藉由複數個金屬薄層而形成。 This layered element has a conductive metal thin-layer electrode arranged on the main surfaces on both sides thereof. The conductive metal thin-layer electrode is not particularly limited as long as it is a conductive metal thin layer (for example, a thickness of about 0.1 μm to 100 μm). For example, it can be made of a metal such as copper, nickel, aluminum, or gold. It can be formed by a plurality of metal thin layers.
導電性金屬薄層電極位於各主表面上之層狀要素，可藉由將構成層狀要素之絕緣性樹脂與構成金屬薄層之金屬片(或金屬箔)一起同時擠壓，獲得在金屬片(或金屬箔)之間夾著絕緣性樹脂的狀態之擠壓物 來製造。另外樣態亦可將絕緣性樹脂之層狀物例如藉由擠壓而獲得，將該層狀物夾在金屬片(或金屬箔)之間，將此等部件成一體地熱壓接獲得壓接物來製造。再者，另外樣態亦可藉由對絕緣性樹脂之層狀要素實施導電性金屬鍍敷，藉以在兩側之主表面上形成導電性金屬薄層電極。如此獲得之具有導電性金屬的層狀要素(擠壓物或壓接物等)，係在兩側主表面具有導電性金屬薄層電極之許多絕緣性樹脂的層狀要素鄰接而集合之狀態，將該層狀要素切成指定之形狀、尺寸，可獲得單一具有導電性薄層之層狀要素。 The layered elements of the conductive metal thin layer electrodes on each main surface can be obtained by simultaneously pressing the insulating resin constituting the layered elements and the metal sheet (or metal foil) constituting the metal thin layer at the same time. (Or metal foil) an extruded material with an insulating resin in between To make. In addition, a layer of an insulating resin can also be obtained by pressing, for example, sandwiching the layer between metal sheets (or metal foils), and thermally bonding these parts together to obtain pressure. To make things. Furthermore, in another aspect, conductive metal plating can be applied to the layered elements of the insulating resin to form conductive metal thin-layer electrodes on the main surfaces on both sides. The layered elements (such as extruded or crimped objects) with conductive metal thus obtained are in a state where the layered elements of many insulating resins having conductive metal thin-layer electrodes on the main surfaces of both sides are adjacent to each other, By cutting this layered element into a specified shape and size, a single layered element having a thin conductive layer can be obtained.
層狀要素之形態並無特別限定，只要在厚度方向之大小比其他方向之大小為小，且宜相當小者(例如為片狀形態)即可。圖示之樣態，層狀要素之俯視形狀係圓環狀，不過並無特別限定，宜為對應於封口體之俯視形狀的形狀。 The form of the layered element is not particularly limited, as long as the size in the thickness direction is smaller than the size in other directions, and it should be relatively small (for example, a sheet-like form). In the state shown in the figure, the plan view shape of the layered element is a ring shape, but it is not particularly limited, and is preferably a shape corresponding to the plan view shape of the sealing body.
上述保護元件具有位於界定貫穿開口部之至少1個的側面上，而電性連接位於層狀要素兩側主表面之導電性金屬薄層電極的保險層。 The protection element has a safety layer on a side surface defining at least one of the through openings, and is electrically connected to the conductive metal thin layer electrodes on the main surfaces on both sides of the layered element.
本發明中，上述保險層亦可為1個金屬層，亦可為包含熔點不同之複數個金屬層，不過宜包含熔點不同之複數個金屬層。 In the present invention, the safety layer may be one metal layer or a plurality of metal layers having different melting points, but it is preferable to include a plurality of metal layers having different melting points.
形成上述金屬層之金屬材料並無特別限定，只要是導電性即可，例如可舉出鎳、銅、銀、金、鋁、鋅、銠、釕、銥、鈀、鉑、鎳-金合金、鎳-磷合金、鎳-硼合金、錫、錫-銀合金、錫-銅合金、錫-銀-銅合金、錫-銀-銅-鉍合金、錫-銀-銅-鉍-銦合金、錫-銀-鉍-銦合金、錫-銀-銅-銻合金、錫-銻合金、錫-銅-鎳-磷-鍺合金、錫-銅-鎳合金、錫-銀-鎳-鈷合金、錫-銀-銅-鈷-鎳合金、錫-鉍-銀合金、錫-鋅合金、錫-銦合金、錫-銅-銻合金、錫- 鐵合金、錫-鎳合金、鋅-鐵合金、鋅-鈷合金、鋅-鈷-鐵合金、錫-鋅合金、鈀-鎳合金及錫-鉍合金。 The metal material forming the metal layer is not particularly limited as long as it is conductive, and examples thereof include nickel, copper, silver, gold, aluminum, zinc, rhodium, ruthenium, iridium, palladium, platinum, nickel-gold alloy, Nickel-phosphorus alloy, nickel-boron alloy, tin, tin-silver alloy, tin-copper alloy, tin-silver-copper alloy, tin-silver-copper-bismuth alloy, tin-silver-copper-bismuth-indium alloy, tin -Silver-bismuth-indium alloy, tin-silver-copper-antimony alloy, tin-antimony alloy, tin-copper-nickel-phosphorus-germanium alloy, tin-copper-nickel alloy, tin-silver-nickel-cobalt alloy, tin -Silver-copper-cobalt-nickel alloy, tin-bismuth-silver alloy, tin-zinc alloy, tin-indium alloy, tin-copper-antimony alloy, tin- Iron alloy, tin-nickel alloy, zinc-iron alloy, zinc-cobalt alloy, zinc-cobalt-iron alloy, tin-zinc alloy, palladium-nickel alloy and tin-bismuth alloy.
上述保險層宜包含：由從鎳、銅、銀、金、鋁、鋅、錫、銠、釕、銥、鈀、鎳-金合金、鎳-磷合金及鎳-硼合金選擇之金屬材料所形成的一個金屬層，及由從錫、錫-銀合金、錫-銅合金、錫-銀-銅合金、錫-銀-銅-鉍合金、錫-銀-銅-鉍-銦合金、錫-銀-鉍-銦合金、錫-銀-銅-銻合金、錫-銻合金、錫-銅-鎳-磷-鍺合金、錫-銅-鎳合金、錫-銀-鎳-鈷合金、錫-銀-銅-鈷-鎳合金、錫-鉍-銀合金、錫-鋅合金及錫-鉍合金選擇之金屬材料所形成的另外金屬層。上述保險層更宜包含由鎳形成之金屬層、及由錫、錫-銅合金或錫-鉍合金而形成之金屬層。 The above insurance layer preferably includes: formed of a metal material selected from nickel, copper, silver, gold, aluminum, zinc, tin, rhodium, ruthenium, iridium, palladium, nickel-gold alloy, nickel-phosphorus alloy, and nickel-boron alloy A metal layer, and consists of tin, tin-silver alloy, tin-copper alloy, tin-silver-copper alloy, tin-silver-copper-bismuth alloy, tin-silver-copper-bismuth-indium alloy, tin-silver -Bismuth-indium alloy, tin-silver-copper-antimony alloy, tin-antimony alloy, tin-copper-nickel-phosphorus-germanium alloy, tin-copper-nickel alloy, tin-silver-nickel-cobalt alloy, tin-silver -An additional metal layer formed of a selected metal material of copper-cobalt-nickel alloy, tin-bismuth-silver alloy, tin-zinc alloy and tin-bismuth alloy. The security layer preferably includes a metal layer formed of nickel and a metal layer formed of tin, a tin-copper alloy, or a tin-bismuth alloy.
如此，藉由保險層為熔點不同之複數個金屬層，過剩電流欲從一方主表面上之導電性金屬薄層電極朝向另一方主表面上的導電性金屬薄層電極流動時，過剩電流集中性流經保險層而發熱的結果，首先，由具有相對性低熔點之金屬形成的金屬層熔解。結果，流經其金屬層之電流流入由具有相對性高熔點的金屬形成之金屬層，流經此處之電流增大，藉由由具有相對性高熔點之金屬形成的金屬層迅速熔解，而迅速且確實遮斷過剩電流。藉由形成此種構成，即使對不致如此程度大幅超過保險層之額定電流的過剩電流，例如對額定電流2倍程度之過剩電流仍可提供確實的保護，可使發揮保護元件之電流遮斷機構的功能提高。 In this way, when the fuse layer is a plurality of metal layers with different melting points, when the excess current is to flow from the conductive metal thin layer electrode on one main surface toward the conductive metal thin layer electrode on the other main surface, the excess current is concentrated. As a result of the heat generated by flowing through the safety layer, first, a metal layer formed of a metal having a relatively low melting point is melted. As a result, the current flowing through its metal layer flows into a metal layer formed of a metal having a relatively high melting point, and the current flowing there increases, and the metal layer formed of a metal having a relatively high melting point is rapidly melted, and Quickly and surely shut off excess current. By forming such a structure, even if the excess current does not greatly exceed the rated current of the fuse layer, for example, it can still provide reliable protection against the excess current of about twice the rated current, and the current interruption mechanism of the protective element can be used. Improved functionality.
一個樣態中，上述保護元件之(ii)導電性金屬薄層電極中，導電性金屬箔側之導電性金屬薄層電極可被省略。此時，導電性金屬箔亦發揮碟型保護元件之一方電極的功能。亦即，導電性金屬箔接觸於上述層 狀要素之主表面，並藉由第二正極蓋側之導電性金屬薄層電極與上述碟型保護元件之保險層直接連接。藉由形成此種構成，由於可省略一方導電性金屬薄層電極，因此可減少零件數量，此外可降低厚度。 In one aspect, the conductive metal thin-layer electrode on the conductive metal foil side of the (ii) conductive metal thin-layer electrode of the protective element may be omitted. At this time, the conductive metal foil also functions as one of the electrodes of the dish-shaped protective element. That is, the conductive metal foil is in contact with the layer The main surface of the shape element is directly connected to the safety layer of the dish-shaped protective element through a conductive metal thin layer electrode on the side of the second positive electrode cover. With such a configuration, since one conductive metal thin-layer electrode can be omitted, the number of parts can be reduced, and the thickness can be reduced.
圖示之樣態係第二正極蓋18具有排氣口28。該排氣口28與上述第一正極蓋12之排氣口26同樣地，係為了藉由電解液及/或活性物質等之異常反應，電池內部產生氣體，電池內壓上升而防爆閥工作時，排出氣體而設。 The state shown in the figure is that the second positive electrode cover 18 has an exhaust port 28. The exhaust port 28 is the same as the exhaust port 26 of the first positive electrode cover 12 described above. When an abnormal reaction of the electrolyte and / or active material occurs, gas is generated inside the battery, and the internal pressure of the battery rises, and the explosion-proof valve operates. , Set to exhaust gas.
本發明中，第二正極蓋由導電性金屬形成。該導電性金屬並無特別限定，例如封口體係用於鋰離子電池時，宜為鎳鍍鋼。 In the present invention, the second positive electrode cover is formed of a conductive metal. The conductive metal is not particularly limited. For example, when the sealing system is used in a lithium ion battery, nickel-plated steel is preferred.
圖示之樣態係在導電性金屬箔14、保護元件16及第二正極蓋18之周圍以及第二正極蓋18之凸緣部20上設置絕緣性墊片22。導電性金屬箔14、保護元件16、第二正極蓋18及絕緣性墊片22如圖示地設置後，藉由第一正極蓋12之壓接部24固定。 As shown in the figure, an insulating gasket 22 is provided around the conductive metal foil 14, the protective element 16, and the second positive electrode cover 18 and the flange portion 20 of the second positive electrode cover 18. The conductive metal foil 14, the protection element 16, the second positive electrode cover 18, and the insulating gasket 22 are provided as shown in the figure, and then fixed by the crimping portion 24 of the first positive electrode cover 12.
本發明中，絕緣性墊片對電解液具有耐腐蝕性，只要是絕緣性，可使用一般性使用之墊片。例如該絕緣性墊片之材料為絕緣性樹脂，例如可舉出聚丙烯、聚乙烯等。 In the present invention, the insulating gasket has corrosion resistance to the electrolytic solution, and as long as it is insulating, a generally used gasket can be used. For example, the material of the insulating gasket is an insulating resin, and examples thereof include polypropylene and polyethylene.
上述絕緣性墊片確保第一正極蓋、保護元件(詳細而言，圖示之樣態係保護元件之第二正極蓋側主表面上的導電性金屬薄層電極)及第二正極蓋之間的絕緣。藉由將該第一正極蓋與保護元件及第二正極蓋之間絕緣，可防止電流從第一正極蓋直接流入第二正極蓋，換言之防止電流不經由保險層而流動。藉由形成如此構成，保護元件工作，藉由遮斷從導電性金屬箔經由保護元件而流向第二正極蓋的電流，可遮斷流經封口體的 電流。此外，上述絕緣性墊片防止電解液漏液。 The above-mentioned insulating gasket secures the space between the first positive electrode cover, the protection element (the conductive metal thin layer electrode on the main surface of the second positive electrode cover side of the protection element in the state shown in the figure) and the second positive electrode cover. Of insulation. By insulating the first positive electrode cover from the protection element and the second positive electrode cover, it is possible to prevent current from flowing directly from the first positive electrode cover to the second positive electrode cover, in other words, to prevent current from flowing without passing through the fuse. With such a configuration, the protection element operates, and by blocking the current flowing from the conductive metal foil to the second positive electrode cover through the protection element, the current flowing through the sealing body can be blocked. Current. The insulating gasket prevents leakage of the electrolyte.
本發明之封口體在因某種異常而發生過電流時，具有保險絲功能之保護元件工作，而遮斷其電流。此外，電池內部產生氣體，電池內壓超過設定值時，作為防爆閥之導電性金屬箔工作，將氣體排出電池外部，以防止電池內壓異常上升。 When an overcurrent occurs in the sealing body of the present invention due to some abnormality, the protective element with a fuse function works to block its current. In addition, gas is generated inside the battery, and when the internal pressure of the battery exceeds a set value, it works as a conductive metal foil of an explosion-proof valve to discharge the gas to the outside of the battery to prevent the battery internal pressure from abnormally rising.
一個樣態中，本發明之封口體，在作為防爆閥之導電性金屬箔工作之前，具有保險絲功能之保護元件工作而遮斷電流。 In one aspect, before the sealing body of the present invention works as the conductive metal foil of the explosion-proof valve, the protective element with a fuse function works to block the current.
圖示之封口體10例如可如以下所示來製造。 The sealing body 10 shown in the figure can be manufactured, for example, as follows.
首先，準備壓接部24為展開狀態之小碟形的第一正極蓋12。在該第一正極蓋之壁面內側設置絕緣性墊片22。此時，在第一正極蓋之底面部不設絕緣性墊片。 First, a small dish-shaped first positive electrode cover 12 in which the crimping portion 24 is in an expanded state is prepared. An insulating gasket 22 is provided inside the wall surface of the first positive electrode cover. In this case, no insulating gasket is provided on the bottom surface of the first positive electrode cover.
其次，在第一正極蓋之內部依序疊層導電性金屬箔14、保護元件16、第二正極蓋18。另外，導電性金屬箔14及保護元件16亦可預先接合作為一個零件。 Next, a conductive metal foil 14, a protective element 16, and a second positive electrode cover 18 are sequentially laminated inside the first positive electrode cover. In addition, the conductive metal foil 14 and the protection element 16 may be previously bonded as one component.
最後，將第一正極蓋之壓接部向內側彎曲，將導電性金屬箔14、保護元件16、第二正極蓋18及絕緣性墊片22加以壓接而固定。 Finally, the crimping portion of the first positive electrode cover is bent inward, and the conductive metal foil 14, the protection element 16, the second positive electrode cover 18 and the insulating gasket 22 are crimped and fixed.
本發明之封口體，因為第一正極蓋12與導電性金屬箔14以面接觸，接觸面積大，且其接觸部分藉由壓接部分而擠壓，所以不需要為了使兩者之電性連接確實而焊接。因此，本發明之封口體可輕易製造。本發明之封口體只須導電性金屬箔具有防爆閥之功能即可，因此，與過去之封口體中也發揮電流遮斷機構功能的防爆閥比較，可使形狀及構造單純化。 In the sealing body of the present invention, since the first positive electrode cover 12 and the conductive metal foil 14 are in surface contact, the contact area is large, and the contact portion is pressed by the crimping portion, so there is no need to electrically connect the two. Indeed and welding. Therefore, the sealing body of the present invention can be easily manufactured. The sealing body of the present invention is only required that the conductive metal foil has the function of an explosion-proof valve. Therefore, compared with the conventional explosion-proof valve that also functions as a current interrupting mechanism in the sealing body, the shape and structure can be simplified.
此外，本發明之封口體，因為第一正極蓋之底面部與導電性 金屬箔的凸緣部之間不需要絕緣，所以與在此處需要絕緣層之過去的封口體比較，可減少厚度。此外，因為可減少封口體零件在疊層方向的零件數，所以可抑制厚度變動，可使施加於零件之負載壓力更穩定。 In addition, in the sealing body of the present invention, the bottom surface of the first positive electrode cover is electrically conductive. Insulation is not required between the flange portions of the metal foil, so that the thickness can be reduced compared to a conventional sealing body where an insulating layer was required here. In addition, since the number of parts of the sealing body part in the lamination direction can be reduced, thickness variations can be suppressed, and the load pressure applied to the parts can be made more stable.
本發明之封口體可適合用作密閉型電池，特別是圓筒型電池，具體而言係圓筒型鋰離子二次電池之封口體。因此，本發明也提供具有本發明之封口體的密閉型電池，特別是圓筒型電池，具體而言係圓筒型鋰離子二次電池。 The sealing body of the present invention can be suitably used as a sealing body of a sealed battery, particularly a cylindrical battery, and more specifically, a cylindrical lithium ion secondary battery. Therefore, the present invention also provides a sealed battery having the sealing body of the present invention, particularly a cylindrical battery, and specifically a cylindrical lithium ion secondary battery.
本發明之封口體可用作密閉型電池，例如圓筒型之密閉型電池，具體而言係圓筒型之鋰離子二次電池的封口體。 The sealing body of the present invention can be used as a sealing body of a sealed battery, such as a cylindrical sealed battery, specifically a cylindrical lithium ion secondary battery.
Claims (11)
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| KR (2) | KR20150119903A (en) |
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| JP5839061B2 (en) * | 2014-02-26 | 2016-01-06 | 株式会社豊田自動織機 | Current interrupt device and power storage device including the same |
| JP2016134317A (en) * | 2015-01-20 | 2016-07-25 | デクセリアルズ株式会社 | Fuse element and circuit module |
| JP6782122B2 (en) * | 2016-08-24 | 2020-11-11 | デクセリアルズ株式会社 | Manufacturing method of protective element, circuit module and protective element |
| KR102642157B1 (en) * | 2018-04-30 | 2024-03-04 | 삼성에스디아이 주식회사 | Cylindrical lithium ion secondary battery |
| JP7241571B2 (en) * | 2019-03-07 | 2023-03-17 | Ｌｉｔｔｅｌｆｕｓｅジャパン合同会社 | sealing body |
| TWI757137B (en) * | 2021-03-31 | 2022-03-01 | 功得電子工業股份有限公司 | Airtight surface mount fuse with insert cavity |
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| JP2001160382A (en) * | 1999-12-02 | 2001-06-12 | Sanyo Electric Co Ltd | Sealed body of battery |
| WO2012118153A1 (en) * | 2011-03-03 | 2012-09-07 | タイコエレクトロニクスジャパン合同会社 | Protective element |
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| JP3196607B2 (en) * | 1995-10-31 | 2001-08-06 | 松下電器産業株式会社 | Explosion-proof sealing plate for sealed batteries |
| JP3732945B2 (en) | 1998-03-31 | 2006-01-11 | 三洋電機株式会社 | Sealed battery |
| JP2002042632A (en) * | 2000-07-25 | 2002-02-08 | Matsuo Electric Co Ltd | Micro-fuse and its manufacturing method |
| JP4719961B2 (en) * | 2000-09-01 | 2011-07-06 | パナソニック株式会社 | Secondary battery and manufacturing method thereof |
| CN201336324Y (en) * | 2008-11-10 | 2009-10-28 | 中银（宁波）电池有限公司 | Sealing body for column type lithium battery |
| JP5385218B2 (en) * | 2009-11-16 | 2014-01-08 | 三星エスディアイ株式会社 | Usage of secondary battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001160382A (en) * | 1999-12-02 | 2001-06-12 | Sanyo Electric Co Ltd | Sealed body of battery |
| WO2012118153A1 (en) * | 2011-03-03 | 2012-09-07 | タイコエレクトロニクスジャパン合同会社 | Protective element |
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| KR20210000746A (en) | 2021-01-05 |
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| CN105027318A (en) | 2015-11-04 |
| CN110635072A (en) | 2019-12-31 |
| TW201444148A (en) | 2014-11-16 |
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