JP5413586B2 - Electrolytic capacitor - Google Patents
Electrolytic capacitor Download PDFInfo
- Publication number
- JP5413586B2 JP5413586B2 JP2009225267A JP2009225267A JP5413586B2 JP 5413586 B2 JP5413586 B2 JP 5413586B2 JP 2009225267 A JP2009225267 A JP 2009225267A JP 2009225267 A JP2009225267 A JP 2009225267A JP 5413586 B2 JP5413586 B2 JP 5413586B2
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- JP
- Japan
- Prior art keywords
- electrolytic capacitor
- hollow portion
- outer case
- pressure valve
- electrolytic
- 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.)
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- 239000003990 capacitor Substances 0.000 title claims description 111
- 239000008151 electrolyte solution Substances 0.000 claims description 48
- 239000002250 absorbent Substances 0.000 claims description 30
- 230000002745 absorbent Effects 0.000 claims description 30
- 238000007789 sealing Methods 0.000 claims description 21
- 239000011888 foil Substances 0.000 claims description 10
- 239000003792 electrolyte Substances 0.000 description 26
- 239000000463 material Substances 0.000 description 12
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 11
- -1 guanidine hydroxyethylated borate Chemical class 0.000 description 10
- 239000003349 gelling agent Substances 0.000 description 8
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 7
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 239000003063 flame retardant Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 150000002357 guanidines Chemical class 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
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- SQSPRWMERUQXNE-UHFFFAOYSA-N Guanylurea Chemical compound NC(=N)NC(N)=O SQSPRWMERUQXNE-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 229920000388 Polyphosphate Polymers 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
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- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- ACVYVLVWPXVTIT-UHFFFAOYSA-M phosphinate Chemical compound [O-][PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-M 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 229920013820 alkyl cellulose Polymers 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- HAMNKKUPIHEESI-UHFFFAOYSA-N aminoguanidine Chemical compound NNC(N)=N HAMNKKUPIHEESI-UHFFFAOYSA-N 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- KZGLRFIQMPDBDV-UHFFFAOYSA-N boric acid;guanidine Chemical compound NC(N)=N.OB(O)O KZGLRFIQMPDBDV-UHFFFAOYSA-N 0.000 description 2
- CEDDGDWODCGBFQ-UHFFFAOYSA-N carbamimidoylazanium;hydron;phosphate Chemical compound NC(N)=N.OP(O)(O)=O CEDDGDWODCGBFQ-UHFFFAOYSA-N 0.000 description 2
- LNEUSAPFBRDCPM-UHFFFAOYSA-N carbamimidoylazanium;sulfamate Chemical compound NC(N)=N.NS(O)(=O)=O LNEUSAPFBRDCPM-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 150000007974 melamines Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- MMHVKBFOWOQNKY-UHFFFAOYSA-N 2-aminoguanidine;phosphoric acid Chemical compound NN=C(N)N.OP(O)(O)=O MMHVKBFOWOQNKY-UHFFFAOYSA-N 0.000 description 1
- YGFAZWHEWCSHTD-UHFFFAOYSA-N 2-aminoguanidine;sulfamic acid Chemical compound NN=C(N)N.NS(O)(=O)=O YGFAZWHEWCSHTD-UHFFFAOYSA-N 0.000 description 1
- JJKVMNNUINFIRK-UHFFFAOYSA-N 4-amino-n-(4-methoxyphenyl)benzamide Chemical compound C1=CC(OC)=CC=C1NC(=O)C1=CC=C(N)C=C1 JJKVMNNUINFIRK-UHFFFAOYSA-N 0.000 description 1
- LWFBRHSTNWMMGN-UHFFFAOYSA-N 4-phenylpyrrolidin-1-ium-2-carboxylic acid;chloride Chemical compound Cl.C1NC(C(=O)O)CC1C1=CC=CC=C1 LWFBRHSTNWMMGN-UHFFFAOYSA-N 0.000 description 1
- 229920001817 Agar Chemical class 0.000 description 1
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- 239000004114 Ammonium polyphosphate Substances 0.000 description 1
- GEHMBYLTCISYNY-UHFFFAOYSA-N Ammonium sulfamate Chemical compound [NH4+].NS([O-])(=O)=O GEHMBYLTCISYNY-UHFFFAOYSA-N 0.000 description 1
- 241001312219 Amorphophallus konjac Species 0.000 description 1
- 235000001206 Amorphophallus rivieri Nutrition 0.000 description 1
- DYCWLOMVYMDRPZ-UHFFFAOYSA-N B(O)(O)O.NNC(=N)N Chemical compound B(O)(O)O.NNC(=N)N DYCWLOMVYMDRPZ-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 108010010803 Gelatin Chemical class 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- 229920002752 Konjac Chemical class 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- GQIALFWVIKTKIO-UHFFFAOYSA-N O[PH2]=O.NC(N)=N Chemical compound O[PH2]=O.NC(N)=N GQIALFWVIKTKIO-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000011949 advanced processing technology Methods 0.000 description 1
- 239000008272 agar Chemical class 0.000 description 1
- 235000010419 agar Nutrition 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 239000000783 alginic acid Substances 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 229960001126 alginic acid Drugs 0.000 description 1
- 150000004781 alginic acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- GJYJYFHBOBUTBY-UHFFFAOYSA-N alpha-camphorene Chemical compound CC(C)=CCCC(=C)C1CCC(CCC=C(C)C)=CC1 GJYJYFHBOBUTBY-UHFFFAOYSA-N 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- OJMOMXZKOWKUTA-UHFFFAOYSA-N aluminum;borate Chemical compound [Al+3].[O-]B([O-])[O-] OJMOMXZKOWKUTA-UHFFFAOYSA-N 0.000 description 1
- NLXYLZCLIHHPMA-UHFFFAOYSA-K aluminum;trisulfamate Chemical compound [Al+3].NS([O-])(=O)=O.NS([O-])(=O)=O.NS([O-])(=O)=O NLXYLZCLIHHPMA-UHFFFAOYSA-K 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- 235000019826 ammonium polyphosphate Nutrition 0.000 description 1
- 229920001276 ammonium polyphosphate Polymers 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- RSIPQRDGPVEGLE-UHFFFAOYSA-L calcium;disulfamate Chemical compound [Ca+2].NS([O-])(=O)=O.NS([O-])(=O)=O RSIPQRDGPVEGLE-UHFFFAOYSA-L 0.000 description 1
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 229920003064 carboxyethyl cellulose Polymers 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000008273 gelatin Chemical class 0.000 description 1
- 229920000159 gelatin Chemical class 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229920013821 hydroxy alkyl cellulose Polymers 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 1
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000252 konjac Chemical class 0.000 description 1
- 235000010485 konjac Nutrition 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- YZVJHCGMTYDKFR-UHFFFAOYSA-L magnesium;disulfamate Chemical compound [Mg+2].NS([O-])(=O)=O.NS([O-])(=O)=O YZVJHCGMTYDKFR-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920002432 poly(vinyl methyl ether) polymer Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 150000004804 polysaccharides Chemical class 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920001289 polyvinyl ether Polymers 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- BTAAXEFROUUDIL-UHFFFAOYSA-M potassium;sulfamate Chemical compound [K+].NS([O-])(=O)=O BTAAXEFROUUDIL-UHFFFAOYSA-M 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- FDDDEECHVMSUSB-UHFFFAOYSA-N sulfanilamide Chemical compound NC1=CC=C(S(N)(=O)=O)C=C1 FDDDEECHVMSUSB-UHFFFAOYSA-N 0.000 description 1
- 229940124530 sulfonamide Drugs 0.000 description 1
- WYXIGTJNYDDFFH-UHFFFAOYSA-Q triazanium;borate Chemical compound [NH4+].[NH4+].[NH4+].[O-]B([O-])[O-] WYXIGTJNYDDFFH-UHFFFAOYSA-Q 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- VLCLHFYFMCKBRP-UHFFFAOYSA-N tricalcium;diborate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]B([O-])[O-].[O-]B([O-])[O-] VLCLHFYFMCKBRP-UHFFFAOYSA-N 0.000 description 1
- NFMWFGXCDDYTEG-UHFFFAOYSA-N trimagnesium;diborate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]B([O-])[O-].[O-]B([O-])[O-] NFMWFGXCDDYTEG-UHFFFAOYSA-N 0.000 description 1
- WUUHFRRPHJEEKV-UHFFFAOYSA-N tripotassium borate Chemical compound [K+].[K+].[K+].[O-]B([O-])[O-] WUUHFRRPHJEEKV-UHFFFAOYSA-N 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/32—Wound capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/145—Liquid electrolytic capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Description
本発明は電子機器に使用される電解コンデンサに関するものである。 The present invention relates to an electrolytic capacitor used in an electronic device.
一般に電解コンデンサは、定格電圧より高い過電圧が印加された場合には、温度上昇によりコンデンサ素子に含浸された駆動用電解液を構成する有機溶媒が蒸気化し、かつ電気化学反応により水素ガスを発生するため、アルミニウムよりなる外装ケースの内圧は上昇する。このときガスの放出口がない場合、外装ケースの内圧が外装ケースの封口部材による封口力を上回れば、コンデンサ素子が外装ケースから外れて外装ケース外に飛び出すか、あるいは外装ケースが飛び跳ねることになって非常に危険となる。 In general, when an overvoltage higher than the rated voltage is applied to an electrolytic capacitor, the organic solvent constituting the driving electrolyte impregnated in the capacitor element is vaporized due to a temperature rise, and hydrogen gas is generated by an electrochemical reaction. Therefore, the internal pressure of the outer case made of aluminum increases. If there is no gas discharge port at this time, if the internal pressure of the outer case exceeds the sealing force of the sealing member of the outer case, the capacitor element will come off the outer case and jump out of the outer case, or the outer case will jump off. Can be very dangerous.
したがって従来のアルミ電解コンデンサでは、通常、外装ケースの天板部に薄肉部よりなる弱点部を設けており、そしてこの外装ケースの内圧が異常に上昇したときには、弱点部が開放されてこの開放部から外装ケース内における駆動用電解液を構成する有機溶媒のガスが外部に流出するため、大きな爆発には至らないものである。 Therefore, in the conventional aluminum electrolytic capacitor, the weak point portion consisting of a thin portion is usually provided on the top plate portion of the outer case, and when the internal pressure of the outer case rises abnormally, the weak point portion is opened and this open portion is opened. Since the organic solvent gas constituting the driving electrolyte in the exterior case flows out to the outside, a large explosion does not occur.
しかしながら、上記構成によれば、駆動用電解液が外部に噴出するため、この電解コンデンサをセットした機器の内部を汚したり、火災による煙と間違えるという問題点があった。 However, according to the above configuration, since the driving electrolyte is ejected to the outside, there is a problem that the inside of the device in which the electrolytic capacitor is set is soiled or mistaken for smoke due to fire.
上記問題点を解決するために、例えば実開平１−１２９８１９号公報（特許文献１）に記載されているような電解コンデンサが提案されている。この公報で開示された電解コンデンサは、圧力弁を形成した外装ケースの底面を、電解液を吸収する性質および通気性を有する被覆材で被覆していた。この構成によれば、異常時に圧力弁が作動した場合、この開弁した圧力弁より噴出した駆動用電解液は被覆材に吸収されるため、外部に流出することはないとされる。 In order to solve the above problems, for example, an electrolytic capacitor as described in Japanese Utility Model Laid-Open No. 1-129819 (Patent Document 1) has been proposed. In the electrolytic capacitor disclosed in this publication, the bottom surface of the outer case in which the pressure valve is formed is covered with a coating material that absorbs the electrolytic solution and has air permeability. According to this configuration, when the pressure valve is activated in the event of an abnormality, the driving electrolyte ejected from the opened pressure valve is absorbed by the covering material, and therefore does not flow out to the outside.
また、特開平５−１３２８９号公報（特許文献２）に記載されているように、駆動用電解液を含浸させたコンデンサ素子と、このコンデンサ素子を内蔵する有底筒状の外装ケースと、コンデンサ素子より導出された一対のリード線と、外装ケースの開口部を封口する封口部材とを備え、外装ケース１２の底面に設けられた圧力弁の上方に、駆動用電解液をゲル化する性質を有する粒状のゲル化剤を配置した電解コンデンサも提案されている。 Further, as described in Japanese Patent Laid-Open No. 5-13289 (Patent Document 2), a capacitor element impregnated with a driving electrolyte, a bottomed cylindrical outer case containing the capacitor element, a capacitor A pair of lead wires led out from the element and a sealing member that seals the opening of the outer case, and the property of gelling the driving electrolyte above the pressure valve provided on the bottom surface of the outer case 12 There has also been proposed an electrolytic capacitor in which a granular gelling agent is disposed.
この特許文献２に記載された電解コンデンサによれば、外装ケースの底面に設けられた圧力弁の上方に駆動用電解液をゲル化する性質を有する粒状のゲル化剤を配置したもので、この電解コンデンサが大量の駆動用電解液を有する大形のアルミ電解コンデンサの場合、定格電圧より高い過電圧が印加されると圧力弁が作動し、この開弁した圧力弁より、大量の駆動用電解液と大量の水素等のガスが噴出されることになるが、圧力弁の上方に粒状のゲル化剤を配置しているため、このゲル化剤の表面積の拡大により単位体積当たりの電解液ゲル化量の増大がはかれるとともに、透気度の低下もなく、これにより、通気性を損なうことなく大量の駆動用電解液をゲル化して保持することができるため、外部への駆動用電解液の流出を未然に防ぐことができるとされる。 According to the electrolytic capacitor described in Patent Document 2, a granular gelling agent having a property of gelling the driving electrolyte is disposed above the pressure valve provided on the bottom surface of the outer case. When the electrolytic capacitor is a large-sized aluminum electrolytic capacitor having a large amount of driving electrolyte, the pressure valve is activated when an overvoltage higher than the rated voltage is applied. A large amount of gas such as hydrogen is ejected, but since the granular gelling agent is placed above the pressure valve, the gelation of the electrolyte per unit volume is achieved by increasing the surface area of this gelling agent. In addition to the increase in volume, there is no decrease in air permeability, which allows a large amount of driving electrolyte to be gelled and retained without impairing air permeability. To prevent It is a can.
しかしながら、特許文献１に示された電解コンデンサにおいては、定格電圧より高い過電圧が印加された場合、多量の駆動用電解液を有する大形の電解コンデンサの場合には、圧力弁の作動時に、大量の電解液蒸気と大量で、かつ高流速の水素等のガスが一度に噴出されるため、スポンジ、フェルト等で形成された被覆材では噴出されたすべての駆動用電解液を吸収するためには、被覆材の厚みを増すか、または被覆材の吸収率を増す必要があり、電解コンデンサが大型化するという問題点がある。特に、圧力弁が開弁したときは、圧力弁の最も脆弱な部分が破断するが、この開弁箇所の大きさは、外装ケースの底面のごく一部である。このため、被覆材が外装ケースの底部に配置されていたとしても、電解液のガス化した有機溶媒は、外装ケースの底面の局所的な開弁箇所より噴出する。一方で、被覆材側では、局所的な開弁箇所の近傍で主に、噴出したガスを吸収されていくため、被覆材の全部に均等に吸収されるわけではない。従って、電解コンデンサに搭載された電解液の量以上の吸収容量をもつ被覆材を用意する必要があり、この観点でも電解コンデンサの大型化を引き起こす。また、被覆材の通気性が損なわれるため、噴出するガスにより圧力弁の上に配置された被覆材が外れるか、もしくは外装ケースの開口部を封口する封口部材が外れ、駆動用電解液が外部に流出するおそれもある。 However, in the electrolytic capacitor disclosed in Patent Document 1, when an overvoltage higher than the rated voltage is applied, in the case of a large electrolytic capacitor having a large amount of driving electrolytic solution, a large amount of the electrolytic capacitor is required during operation of the pressure valve. In order to absorb all of the driving electrolyte that was sprayed with a coating formed of sponge, felt, etc. However, it is necessary to increase the thickness of the covering material or to increase the absorption rate of the covering material, and there is a problem that the electrolytic capacitor becomes large. In particular, when the pressure valve is opened, the most fragile portion of the pressure valve is broken, but the size of the valve opening portion is a very small part of the bottom surface of the outer case. For this reason, even if the coating | covering material is arrange | positioned at the bottom part of the exterior case, the organic solvent gasified of electrolyte solution spouts from the local valve opening location of the bottom face of an exterior case. On the other hand, on the coating material side, the ejected gas is mainly absorbed in the vicinity of the local valve opening location, so that it is not uniformly absorbed by the entire coating material. Therefore, it is necessary to prepare a coating material having an absorption capacity equal to or more than the amount of the electrolytic solution mounted on the electrolytic capacitor, which also causes an increase in the size of the electrolytic capacitor. Also, since the air permeability of the covering material is impaired, the covering material disposed on the pressure valve is removed by the gas to be ejected, or the sealing member that seals the opening of the outer case is removed, and the driving electrolyte is externally There is also a risk of leakage.
また、特許文献２に示された電解コンデンサにおいては、外装ケースの底部に圧力弁を形成するとともに、外装ケースの圧力弁の上方に空間部を介してゲル化剤を配置する構成となっているが、空間部やゲル化剤の収納空間が必要となり、電解コンデンサの大型化、特に電解コンデンサの高さ寸法が長くなるという問題がある。また、外装ケースとしても、断面Ｈ型の有底筒状の外装ケースを作成する必要があり、そのような外装ケースの作成は高度な加工技術が要求される。 Moreover, in the electrolytic capacitor shown by patent document 2, while having formed a pressure valve in the bottom part of an exterior case, it has the structure which arrange | positions a gelatinizer above a pressure valve of an exterior case via a space part. However, there is a problem that a space portion and a storage space for the gelling agent are required, and the electrolytic capacitor is enlarged, particularly, the height dimension of the electrolytic capacitor is increased. In addition, as the exterior case, it is necessary to create a bottomed cylindrical exterior case having an H-shaped cross section, and the creation of such an exterior case requires advanced processing technology.
本発明は、上記のような従来の電解コンデンサにおける問題点に鑑み、さらに検討を加えた結果なされたもので、電解コンデンサの圧力弁が開弁した際でも、気化した電解液が煙のように噴出することが無く、さらに、電解コンデンサの高さ寸法の大型化を招くことのない、電解コンデンサを提供することを目的とする。 The present invention has been made as a result of further studies in view of the problems in the conventional electrolytic capacitor as described above. Even when the pressure valve of the electrolytic capacitor is opened, the vaporized electrolytic solution is like smoke. An object of the present invention is to provide an electrolytic capacitor that does not erupt and does not cause an increase in the height of the electrolytic capacitor.
そこで、この出願の請求項１に係る発明では、陽極箔と陰極箔をセパレータを介して巻回したコンデンサ素子に電解液を含浸し、外装ケースに収納するとともに、外装ケースの開口端部を封止してなる電解コンデンサにおいて、外装ケースの外底面から内部に突出する有底の中空部を形成し、該中空部の頂部に電解コンデンサの内圧が所定値以上に上昇した際に開弁する圧力弁を形成するとともに、前記中空部に電解液吸収剤を収納した電解コンデンサとした。 Therefore, in the invention according to claim 1 of this application, a capacitor element in which an anode foil and a cathode foil are wound through a separator is impregnated with an electrolytic solution, and is stored in the outer case, and the opening end of the outer case is sealed. In a closed electrolytic capacitor, a bottomed hollow portion protruding from the outer bottom surface of the outer case is formed, and the pressure that opens when the internal pressure of the electrolytic capacitor rises above a predetermined value at the top of the hollow portion While forming a valve, it was set as the electrolytic capacitor which accommodated the electrolyte solution absorber in the said hollow part.
また、請求項２に係る発明では、請求項１に記載した電解コンデンサにおいて、前記中空部の頂部が、コンデンサ素子の高さ寸法の中心の位置からコンデンサ素子の電極タブ導出端面を超えない位置の間に配置されたことを特徴とする。 Moreover, in the invention which concerns on Claim 2, in the electrolytic capacitor described in Claim 1, the top part of the said hollow part is a position which does not exceed the electrode tab derivation | leading-end surface of a capacitor element from the center position of the height dimension of a capacitor element. It is arranged between them.
さらに請求項３に係る発明では、請求項１または請求項２にいずれかに記載の電解コンデンサにおいて、前記圧力弁が、前記中空部の頂部に貫通孔を設けるとともに、この貫通孔を閉塞する弾性体からなることを特徴とする。 Furthermore, in the invention according to claim 3, in the electrolytic capacitor according to claim 1 or 2, the pressure valve is provided with a through-hole at the top of the hollow portion and elastically closes the through-hole. It consists of a body.
電解コンデンサが、保証寿命を超えた場合や、過電圧が印加された場合、電解コンデンサの内圧は上昇する。電解コンデンサの内圧が予め設定された圧力を超えた場合には、圧力弁が破断して内圧を開放する。この際、破断した圧力弁からは、水素ガスや電解液が噴出する。多くの場合、圧力弁が動作する状態では、電解コンデンサは高温になっており、電解液がガス化するような場合もある。しかし、この発明では、この噴出した電解液は、圧力弁の外に配置された電解液吸収剤によって吸収される。特に電解液吸収剤は外装ケース底面に形成された中空部に収納されており、この中空部はコンデンサ素子の電極タブ導出タブ近傍まで形成されているため、圧力弁から電解コンデンサの外部までの距離は長い。このため、電解液吸収剤によって吸収されない電解液が無くなり、ガス化した電解液が煙状となって電解コンデンサの外部に放出されることがなくなる。 When the electrolytic capacitor exceeds the guaranteed life or an overvoltage is applied, the internal pressure of the electrolytic capacitor increases. When the internal pressure of the electrolytic capacitor exceeds a preset pressure, the pressure valve breaks to release the internal pressure. At this time, hydrogen gas or an electrolytic solution is ejected from the broken pressure valve. In many cases, when the pressure valve is operated, the electrolytic capacitor is at a high temperature, and the electrolytic solution may be gasified. However, in the present invention, the ejected electrolyte is absorbed by the electrolyte absorbent disposed outside the pressure valve. In particular, the electrolyte absorbent is housed in a hollow portion formed on the bottom surface of the outer case, and since this hollow portion is formed to the vicinity of the electrode tab lead tab of the capacitor element, the distance from the pressure valve to the outside of the electrolytic capacitor Is long. For this reason, there is no electrolyte solution that is not absorbed by the electrolyte solution absorbent, and the gasified electrolyte solution is not smoked and released outside the electrolytic capacitor.
また、圧力弁から噴出した電解液の経路は中空部の内空間を通じて外部に噴出していく。中空部の内空間には電解液吸収剤が収納されているが、中空部内空間は、圧力弁が動作して電解液を噴出している箇所に対して、対向面積は比較的小さく（電解コンデンサの底面全体に対して）、かつその経路は長い。このため、中空部に収納した電解液吸収剤を全て、電解液の吸収に寄与させることができる。従って、電解コンデンサにおける電解液搭載量に対し、その搭載量に応じた吸収容量を有する電解液吸収剤を中空部に収納すればよい。換言すれば、中空部内空間は必要最低限の空間と設計すればよく、必要以上に電解コンデンサが大型化することがない。 Further, the path of the electrolytic solution ejected from the pressure valve is ejected to the outside through the inner space of the hollow portion. The electrolytic solution absorbent is accommodated in the inner space of the hollow portion, but the facing area of the inner space of the hollow portion is relatively small with respect to the location where the pressure valve operates and the electrolytic solution is ejected (electrolytic capacitor). And the path is long. For this reason, all the electrolyte solution absorber accommodated in the hollow part can be contributed to absorption of electrolyte solution. Therefore, an electrolytic solution absorbent having an absorption capacity corresponding to the mounting amount of the electrolytic solution in the electrolytic capacitor may be stored in the hollow portion. In other words, the space in the hollow portion may be designed as a minimum necessary space, and the electrolytic capacitor does not become larger than necessary.
すなわち、電解コンデンサを必要以上に大型化することなく、電解コンデンサの外部に電解液が噴出することを確実に防止することができる。 That is, it is possible to reliably prevent the electrolytic solution from being ejected outside the electrolytic capacitor without enlarging the electrolytic capacitor more than necessary.
次にこの発明の実施形態について述べる。
図1にはこの発明の第一の実施形態の電解コンデンサの内部構造を示している。また、図2にはこの発明の第二の実施形態の電解コンデンサの内部構造を示している。これら図１、図2の共通部分については同一の符号を用いている。ここでは、主に第一の実施形態を図１と共に説明する。
Next, an embodiment of the present invention will be described.
FIG. 1 shows the internal structure of the electrolytic capacitor according to the first embodiment of the present invention. FIG. 2 shows the internal structure of the electrolytic capacitor according to the second embodiment of the present invention. 1 and 2 are denoted by the same reference numerals. Here, the first embodiment will be mainly described with reference to FIG.
コンデンサ素子１は陽極箔と陰極箔をセパレータを介して巻回して形成したものである。陽極箔および陰極箔には、それぞれ電極タブ（陽極タブ２ａ、陰極タブ２ｂ）が接続され、一方の巻回端面より導出されている。またセパレータは陽極箔、陰極箔の幅よりも幅広に形成され、コンデンサ素子１の両端はセパレータのみが巻回された構造となっている。また、コンデンサ素子１の中心部は空芯部１ａとなっている。この空芯部１ａの径は、後述する外装ケース６の中空部６ｂの径よりも大径となる。 The capacitor element 1 is formed by winding an anode foil and a cathode foil through a separator. Electrode tabs (anode tab 2a and cathode tab 2b) are connected to the anode foil and the cathode foil, respectively, and are led out from one winding end face. The separator is formed wider than the anode foil and the cathode foil, and the capacitor element 1 has a structure in which only the separator is wound at both ends. The central portion of the capacitor element 1 is an air core portion 1a. The diameter of the air core portion 1a is larger than the diameter of the hollow portion 6b of the exterior case 6 described later.
封口板３はフェノール等の樹脂板３ａに弾性ゴム３ｂを貼り付けたもので、封口板３の表裏を貫通するリベット４ａ、４ｂが埋設されている。封口板３の外部では、リベット４ａ、４ｂに外部端子５ａ、５ｂが接続され、封口板３の内部側では、リベット４ａ、４ｂにはコンデンサ素子１から導出した電極タブ２ａ、２ｂが接続される。 The sealing plate 3 is made by attaching an elastic rubber 3b to a resin plate 3a such as phenol, and rivets 4a and 4b penetrating the front and back of the sealing plate 3 are embedded. External terminals 5a and 5b are connected to the rivets 4a and 4b outside the sealing plate 3, and electrode tabs 2a and 2b led out from the capacitor element 1 are connected to the rivets 4a and 4b on the inner side of the sealing plate 3. .
外装ケース６は、アルミニウム等の金属からなる有底円筒状のものである。そして外装ケース６の側面には、封口板３を支持するための横溝６ａが形成され、さらに外装ケース６の外底面から外装ケース６の内部に突出する中空部６ｂが形成されている。この中空部６ｂは有底の円筒状で、外装ケース６の底面に対して垂直に形成されており、外装ケース６の中心軸と中空部６ｂの中心軸が共通となるように、外装ケース６の底部の中心に形成されている。 The outer case 6 has a bottomed cylindrical shape made of a metal such as aluminum. A lateral groove 6 a for supporting the sealing plate 3 is formed on the side surface of the outer case 6, and a hollow portion 6 b that protrudes from the outer bottom surface of the outer case 6 to the inside of the outer case 6 is formed. The hollow portion 6b has a bottomed cylindrical shape and is formed perpendicular to the bottom surface of the outer case 6 so that the central axis of the outer case 6 and the central axis of the hollow portion 6b are common. It is formed in the center of the bottom of the.
中空部６ｂの高さは、後述するように電解コンデンサを組み立てた際に、コンデンサ素子１の高さ寸法の中心よりもコンデンサ素子１の電極タブ導出端面側の位置で、コンデンサ素子の電極タブ導出端面を超えない位置に形成しておくことが好ましい。 The height of the hollow part 6b is derived from the electrode tab of the capacitor element at a position closer to the electrode tab leading end face side of the capacitor element 1 than the center of the height of the capacitor element 1 when the electrolytic capacitor is assembled as will be described later. It is preferable to form at a position not exceeding the end face.
そして、中空部６ｂの頂部６ｃには電解コンデンサの内圧が上昇し、所定の圧力以上となった際に、破断して、内圧を開放する圧力弁７が形成されている。この圧力弁７は、中空部６ｂの頂部６ｃに貫通孔を設け、この貫通孔にゴム等の弾性体弁７ａを収納して貫通孔を閉塞した圧力弁（第一の実施形態）や、図２に示すように、頂部の中心から放射状に肉薄となる切溝部７ｂを形成し、機械的脆弱部とした圧力弁（第二の実施形態）等、従来の電解コンデンサで使用されていた圧力弁構造を用いることができる。 The top portion 6c of the hollow portion 6b is formed with a pressure valve 7 that breaks and releases the internal pressure when the internal pressure of the electrolytic capacitor rises and exceeds a predetermined pressure. This pressure valve 7 is a pressure valve (first embodiment) in which a through hole is provided in the top portion 6c of the hollow portion 6b, and an elastic body valve 7a such as rubber is accommodated in the through hole to close the through hole. As shown in FIG. 2, a pressure valve used in a conventional electrolytic capacitor, such as a pressure valve (second embodiment) in which a kerf portion 7b that is radially thinned from the center of the top portion is formed as a mechanically fragile portion A structure can be used.
電解コンデンサを製造する工程について説明すると、コンデンサ素子１から導出された電極タブ（２ａ、２ｂ）を、封口板３のリベット（４ａ，４ｂ）にそれぞれ加締めつけて接続する。そして、コンデンサ素子１に駆動用電解液を含浸し、コンデンサ素子１を封口板３とともに外装ケース６に収納する。この際、コンデンサ素子１の空芯部１ａに、外装ケース６の中空部６ｂが挿入される。また、封口板３は外装ケース６の側面に形成した横溝部６ａに支持される。この状態で、外装ケース６の開口端部をカーリング加工して、開口端部を封口板３の弾性ゴム３ｂに食い込ませるようにして封止を行う。 The process of manufacturing the electrolytic capacitor will be described. The electrode tabs (2a, 2b) led out from the capacitor element 1 are respectively crimped and connected to the rivets (4a, 4b) of the sealing plate 3. Then, the capacitor element 1 is impregnated with the driving electrolyte, and the capacitor element 1 is stored in the outer case 6 together with the sealing plate 3. At this time, the hollow portion 6 b of the outer case 6 is inserted into the air core portion 1 a of the capacitor element 1. The sealing plate 3 is supported by a lateral groove 6 a formed on the side surface of the outer case 6. In this state, the opening end portion of the outer case 6 is curled, and sealing is performed so that the opening end portion bites into the elastic rubber 3 b of the sealing plate 3.
ここで、電解コンデンサとして作成した際の、コンデンサ素子１の高さ寸法と、中空部６ｂの位置関係について、図３とともに説明する。コンデンサ素子１の中心部は空芯部１ａとして形成されており、外装ケース６の中空部６ｂが挿入される。そして、外装ケース６の底面に接触するようにコンデンサ素子１が載置されるが、このときの中空部６ｂの頂部６ｃは、コンデンサ素子１の高さ寸法Ｌの中心位置Ｃよりも電極タブ導出端面１ｂ側に位置するようにする。しかし、頂部６ｃがコンデンサ素子の電極タブ導出端面１ｃを超えない位置に配置するようにする。すなわち、図３中で、両矢印で示した頂部の設定範囲に、頂部が配置されるように設定する。 Here, the height relationship of the capacitor element 1 and the positional relationship between the hollow portions 6b when produced as an electrolytic capacitor will be described with reference to FIG. The center part of the capacitor element 1 is formed as an air core part 1a, and the hollow part 6b of the outer case 6 is inserted. Then, the capacitor element 1 is placed so as to be in contact with the bottom surface of the outer case 6. At this time, the top portion 6 c of the hollow portion 6 b is led out from the center position C of the height dimension L of the capacitor element 1. It is located on the end face 1b side. However, the top 6c is arranged at a position not exceeding the electrode tab lead-out end face 1c of the capacitor element. That is, in FIG. 3, it sets so that a top part may be arrange | positioned in the setting range of the top part shown with the double arrow.
中空部６ｂには、後述するように、外部より電解液吸収剤８を収納するため、この電解吸収剤８を収納する容量としては、中空部６ｂは、コンデンサ素子１の電極タブ導出端面１ｂに近いほど、中空部８ｂの内空間が大きくなるため有利である。このため、少なくともコンデンサ素子１の高さ寸法Ｌの中心位置Ｃよりも電極タブ導出端面１ｂ側に、中空部６ｂの頂部６ｃが位置するようにすれば、中空部８ｂの内空間を大きなものとすることができる。 As will be described later, since the electrolyte absorbent 8 is accommodated in the hollow portion 6b from the outside, the capacity for accommodating the electrolytic absorbent 8 is that the hollow portion 6b is connected to the electrode tab leading end face 1b of the capacitor element 1. The closer it is, the more advantageous the internal space of the hollow portion 8b becomes. For this reason, if the top part 6c of the hollow part 6b is located at least on the electrode tab leading end face 1b side with respect to the center position C of the height dimension L of the capacitor element 1, the inner space of the hollow part 8b is increased. can do.
一方で、頂部６ｃがコンデンサ素子１の電極タブ導出端面１ｃを超えて突出する位置となると、頂部６ｃと封口板３が当接し、コンデンサ素子１と封口板３の間に空間を形成するようになる。このコンデンサ素子１と封口板３の間の空間は、静電容量には寄与せず、電解コンデンサの小型化を阻害する。このため、頂部６ｃがコンデンサ素子１の電極タブ導出端面１ｂを超えて突出する位置とすることは好ましくない。また、コンデンサ素子１の電極タブ導出端面１ｂを超えて突出する位置とした場合において、封口板３を外装ケースに収納した際に、電極タブ（２ａ，２ｂ）は折りたたまれるようにして収納されるが、この電極タブ（２ａ，２ｂ）、特に陽極タブ２ａが頂部６ｃと接触した場合には、電解コンデンサの陽極と陰極がショート状態となる。この観点からも、頂部６ｃの位置は、コンデンサ素子１の電極タブ導出端面１ｂを超えない位置とすることが好ましい。 On the other hand, when the top portion 6c protrudes beyond the electrode tab leading end surface 1c of the capacitor element 1, the top portion 6c and the sealing plate 3 come into contact with each other so that a space is formed between the capacitor element 1 and the sealing plate 3. Become. The space between the capacitor element 1 and the sealing plate 3 does not contribute to the electrostatic capacity and hinders the downsizing of the electrolytic capacitor. For this reason, it is not preferable that the top portion 6c is positioned so as to protrude beyond the electrode tab leading end face 1b of the capacitor element 1. Further, when the sealing plate 3 is housed in the exterior case when the sealing plate 3 is housed in the exterior case in the position protruding beyond the electrode tab leading end face 1b of the capacitor element 1, the electrode tabs (2a, 2b) are housed so as to be folded. However, when the electrode tabs (2a, 2b), in particular, the anode tab 2a are in contact with the top portion 6c, the anode and cathode of the electrolytic capacitor are short-circuited. Also from this viewpoint, it is preferable that the position of the top portion 6 c is a position that does not exceed the electrode tab leading end face 1 b of the capacitor element 1.
好適には、頂部６ｃの位置は、コンデンサ素子１の電極タブ導出端面１ｂよりも、１〜２ｍｍほど底面側となる位置に配置されることが好ましい。 Preferably, the position of the top portion 6c is preferably arranged at a position on the bottom surface side by about 1 to 2 mm from the electrode tab leading end surface 1b of the capacitor element 1.
さらに、外装ケース６の中空部６ｂに電解液吸収剤８を収納する。電解液吸収剤８としては、電解液を吸収しうる性質のものであれば良く、紙、布、フェルト、スポンジ、脱脂綿等が利用できる。ただし、高温となって噴出する電解液に晒されるため、耐熱性のものが好ましく、例えば濾紙などの紙、ポリエステルやポリアミド製などの不織布、スポンジなどを難燃化したものが挙げられる。 Furthermore, the electrolyte absorbent 8 is accommodated in the hollow portion 6 b of the outer case 6. The electrolyte absorbent 8 may be of any nature that can absorb the electrolyte, and paper, cloth, felt, sponge, absorbent cotton, etc. can be used. However, since it is exposed to the electrolyte solution ejected at a high temperature, a heat-resistant one is preferable. Examples thereof include paper made of filter paper, non-woven fabric made of polyester or polyamide, sponge made of flame retardant, and the like.
この吸収材に施した難燃化処理に使用される難燃剤としては特に限定はなく、例えばグアニジン塩系化合物［グアニジン塩（リン酸グアニジン，ホウ酸グアニジン，スルファミン酸グアニジン，次亜リン酸グアニジン，ポリリン酸グアニジンなど）、アミノ置換もしくはアミノ基含有グアニジン塩（リン酸グアニル尿素，ホウ酸グアニル尿素，スルファミン酸グアニル尿素，次亜リン酸グアニル尿素，ポリリン酸グアニル尿素など、リン酸アミノグアニジン，ホウ酸アミノグアニジン，スルファミン酸アミノグアニジン，次亜リン酸アミノグアニジン，ポリリン酸アミノグアニジンなど）、およびヒドロキシアルキル置換グアニジン塩（メチロール化リン酸グアニジン，メチロール化ホウ酸グアニジン，メチロール化スルファミン酸グアニジン，メチロール化次亜リン酸グアニジン，メチロール化ポリリン酸グアニジンなど、ヒドロキシエチル化リン酸グアニジン，ヒドロキシエチル化ホウ酸グアニジン，ヒドロキシエチル化スルファミン酸グアニジン，ヒドロキシエチル化次亜リン酸グアニジン，ヒドロキシエチル化ポリリン酸グアニジンなど）］；強酸のアンモニウム塩（リン酸アンモニウム，ホウ酸アンモニウム，スルファミン酸アンモニウム，次亜リン酸アンモニウム，ポリリン酸アンモニウムなど）；強酸の金属塩（リン酸ナトリウム，リン酸カリウム，リン酸マグネシウム，リン酸カルシウム，リン酸亜鉛，リン酸アルミニウムなど、ホウ酸ナトリウム，ホウ酸カリウム，ホウ酸マグネシウム，ホウ酸カルシウム，ホウ酸亜鉛，ホウ酸アルミニウムなど、スルファミン酸ナトリウム，スルファミン酸カリウム，スルファミン酸マグネシウム，スルファミン酸カルシウム，スルファミン酸亜鉛，スルファミン酸アルミニウムなど）；ジシアンジアミド類（ジシアンジアミド，メチロール化ジシアンジアミド，ヒドロキシエチル化ジシアンジアミド）；並びにメラミン類（メラミン，メチロール化メラミン，ヒドロキシエチル化メラミン）が挙げられる。 The flame retardant used in the flame retardant treatment applied to the absorbent material is not particularly limited. For example, a guanidine salt-based compound [guanidine salt (guanidine phosphate, guanidine borate, guanidine sulfamate, guanidine hypophosphite, Guanidine polyphosphate, etc.), amino-substituted or amino group-containing guanidine salts (guanyl urea phosphate, guanyl urea borate, guanyl urea sulfamate, guanyl urea hypophosphite, guanyl urea polyphosphate, etc., amino guanidine phosphate, boric acid Aminoguanidine, aminoguanidine sulfamate, aminoguanidine hypophosphite, aminoguanidine polyphosphate, and hydroxyalkyl-substituted guanidine salts (methylolated guanidine phosphate, methylolated borate guanidine, methylolated guanidinium sulfamate) , Methylolated hypophosphite guanidine, methylolated polyphosphate guanidine, etc., hydroxyethylated guanidine hydroxyphosphate, guanidine hydroxyethylated borate, guanidine hydroxyethylated sulfamate, guanidine hydroxyethylated phosphite, hydroxyethylated polyphosphorus Acid guanidine, etc.]; ammonium salts of strong acids (ammonium phosphate, ammonium borate, ammonium sulfamate, ammonium hypophosphite, ammonium polyphosphate, etc.); metal salts of strong acids (sodium phosphate, potassium phosphate, phosphoric acid) Magnesium, calcium phosphate, zinc phosphate, aluminum phosphate, sodium borate, potassium borate, magnesium borate, calcium borate, zinc borate, aluminum borate, sulfamine Sodium, potassium sulfamate, magnesium sulfamate, calcium sulfamate, zinc sulfamate, aluminum sulfamate); dicyandiamides (dicyandiamide, methylolated dicyandiamide, hydroxyethylated dicyandiamide); and melamines (melamine, methylolated melamine, hydroxy) Ethylated melamine).
これらの難燃剤のうち好ましいものはグアニジン塩系化合物、強酸のアンモニウム塩、強酸の金属塩である。 Among these flame retardants, preferred are guanidine salt compounds, ammonium salts of strong acids, and metal salts of strong acids.
吸収材を難燃化処理する方法は、例えば紙と難燃剤の水溶液に浸漬後乾燥する方法、ハケにて塗布する方法などである。 Examples of the method for flame-retardant treatment of the absorbent material include a method of drying after dipping in an aqueous solution of paper and a flame retardant, and a method of applying with a brush.
また、電解液吸収剤としては、電解液をゲル化することで電解液を捕捉し、電解液が外部へ噴出することを防止するものであってもよい。このゲル化剤としては特に限定はなく、例えばセルロース，硝酸セルロース，酢酸セルロース，ヒドロキシアルキルセルロース（ヒドロキシメチルセルロース，ヒドロキシエチルセルロース，ヒドロキシプロピルセルロース等）、アルキルセルロース（メチルセルロース，エチルセルロース等）、カルボキシアルキルセルロースのアルカリ金属塩（ナトリウムカルボキシメチルセルロース，ナトリウムカルボキシエチルセルロース等）等のセルロース誘導体、アルギン酸のアルカリ金属塩（アルギン酸ナトリウム等）、ゼラチン，寒天，コンニャク粉，デンプン，砂糖や多糖類、タンパク質（アクトアルブミン，卵黄タンパク等）のいずれか１種もしくはこれらの２種以上を混合したものが挙げられる。またその他のゲル化剤としては、ポリビニルアルコール，ポリビニルアルコール誘導体（フォマール化ポリビニルアルコール，アセタール化ポリビニルアルコール，ブチラール化ポリビニルアルコール等）、ポリビニルエーテル誘導体（ポリビニルメチルエーテル，ポリビニルエチルエーテル等）、ポリ酢酸ビニル，酢酸ビニル−ビニルアルコール共重合体、酢酸ビニル−エチレン共重合体、ポリエチレン，ポリプロピレン，ポリイソブチレンのいずれか１種または２種以上を共重合もしくは混合したものが挙げられる。 Moreover, as an electrolyte solution absorbent, an electrolyte solution may be captured by gelling the electrolyte solution, and the electrolyte solution may be prevented from being ejected to the outside. The gelling agent is not particularly limited. For example, cellulose, cellulose nitrate, cellulose acetate, hydroxyalkylcellulose (hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, etc.), alkylcellulose (methylcellulose, ethylcellulose, etc.), carboxyalkylcellulose alkali Cellulose derivatives such as metal salts (sodium carboxymethylcellulose, sodium carboxyethylcellulose, etc.), alkali metal salts of alginic acid (sodium alginate, etc.), gelatin, agar, konjac flour, starch, sugar, polysaccharides, proteins (actalbumin, egg yolk protein, etc.) ), Or a mixture of two or more thereof. Other gelling agents include polyvinyl alcohol, polyvinyl alcohol derivatives (formalized polyvinyl alcohol, acetalized polyvinyl alcohol, butyralized polyvinyl alcohol, etc.), polyvinyl ether derivatives (polyvinyl methyl ether, polyvinyl ethyl ether, etc.), polyvinyl acetate. , Vinyl acetate-vinyl alcohol copolymer, vinyl acetate-ethylene copolymer, polyethylene, polypropylene, polyisobutylene, or a copolymer or mixture thereof.
これらのゲル化剤のうち好ましいものは、セルロースやアルキルセルロース，カルボキシアルキルセルロースのアルカリ金属塩等のセルロース誘導体である。 Among these gelling agents, preferred are cellulose derivatives such as cellulose, alkylcellulose, and alkali metal salts of carboxyalkylcellulose.
本発明においては、以上のような電解液吸収剤８を用いることができるが、中空部６ｂに収納する際は電解液吸収剤のみを収納することもできるし、他の機能性材料とともに収納することも可能である。例えば、圧力弁７側にガラス球、セラミック粒子、活性炭等の粒状物質、または多孔質セラミック、多孔質焼結体金属等の多孔質物質を配置し、外装ケース６の底面側に電解液吸収剤を配置してもよい。この場合には、圧力弁７より噴出したガスが、粒状物質あるいは多孔質物質に接触して冷却されて液化し、この液化した電解液が、電解液吸収剤８によって吸収されるようになる。 In the present invention, the electrolytic solution absorbent 8 as described above can be used, but when stored in the hollow portion 6b, only the electrolytic solution absorbent can be stored or stored together with other functional materials. It is also possible. For example, a granular material such as glass spheres, ceramic particles, activated carbon or the like, or a porous material such as porous ceramic or porous sintered metal is disposed on the pressure valve 7 side, and an electrolyte solution absorbent on the bottom surface side of the outer case 6 May be arranged. In this case, the gas ejected from the pressure valve 7 comes into contact with the particulate material or the porous material and is cooled and liquefied, and the liquefied electrolytic solution is absorbed by the electrolytic solution absorbent 8.
なお、中空部６ｂに収納する電解液吸収剤８等が柔軟性、可撓性を有し、圧力弁７の開弁動作を阻害しない場合には、中空部６ｂの内空間の全てに電解液吸収剤８等を収納することが可能である。電解液吸収剤８等が比較的硬質で、電解液吸収剤８等と圧力弁７と接触することで圧力弁７の開弁動作を阻害する場合には、予め圧力弁７の動作範囲を考慮して、動作を阻害しないような適当な空間を空けて、電解液吸収剤８等を収納する。 In addition, when the electrolyte absorbent 8 etc. accommodated in the hollow part 6b has flexibility and flexibility and does not hinder the valve opening operation of the pressure valve 7, the electrolyte solution is added to the entire inner space of the hollow part 6b. It is possible to store the absorbent 8 or the like. When the electrolytic solution absorbent 8 or the like is relatively hard and the valve opening operation of the pressure valve 7 is inhibited by contacting the electrolytic solution absorbent 8 or the like with the pressure valve 7, the operational range of the pressure valve 7 is taken into consideration in advance. Then, an appropriate space that does not hinder the operation is provided, and the electrolyte absorbent 8 and the like are accommodated.
また、電解液吸収剤６が中空部６ｂから脱落することを防止するために、電解コンデンサで通常使用されている樹脂製の底板の外装ケースの外底面に配置し、熱収縮性のスリーブで電解コンデンサ全体を被覆することで、底板を電解コンデンサ本体に固定しておくことも可能である。また、粘着剤を使用して底板を底面に貼り付けることも可能である。 Further, in order to prevent the electrolyte absorbent 6 from falling off the hollow portion 6b, it is arranged on the outer bottom surface of the outer case of a resin bottom plate usually used in an electrolytic capacitor, and is electrolyzed with a heat-shrinkable sleeve. It is also possible to fix the bottom plate to the electrolytic capacitor body by covering the entire capacitor. It is also possible to stick the bottom plate to the bottom using an adhesive.
この実施形態での電解コンデンサの動作について説明する。
電解コンデンサが、保証寿命を超えた場合や、過電圧が印加された場合、電解コンデンサの内圧は上昇する。電解コンデンサの内圧が予め設定された圧力を超えた場合には、圧力弁７が破断して内圧を開放する。この際、破断した圧力弁７からは、水素ガスや電解液が噴出する。多くの場合、圧力弁７が動作する状態では、電解コンデンサは高温になっており、電解液がガス化するような場合もある。この噴出した電解液は、圧力弁の外に配置された電解液吸収剤８によって吸収される。特に電解液吸収剤８は外装ケース６の底面に形成された中空部６ｂに収納されており、この中空部６ｂはコンデンサ素子１の電極タブ導出端面１ｂの近傍まで形成されているため、圧力弁７から電解コンデンサの外部までの距離は長い。このため、電解液吸収剤８によって吸収されない電解液が無くなり、電解液が煙状となって電解コンデンサの外部に放出されることがなくなる。
The operation of the electrolytic capacitor in this embodiment will be described.
When the electrolytic capacitor exceeds the guaranteed life or an overvoltage is applied, the internal pressure of the electrolytic capacitor increases. When the internal pressure of the electrolytic capacitor exceeds a preset pressure, the pressure valve 7 is broken to release the internal pressure. At this time, hydrogen gas or an electrolytic solution is ejected from the broken pressure valve 7. In many cases, in a state where the pressure valve 7 is operated, the electrolytic capacitor is at a high temperature, and the electrolytic solution may be gasified. The ejected electrolytic solution is absorbed by the electrolytic solution absorbent 8 disposed outside the pressure valve. In particular, the electrolyte absorbent 8 is housed in a hollow portion 6b formed on the bottom surface of the outer case 6, and the hollow portion 6b is formed up to the vicinity of the electrode tab leading end surface 1b of the capacitor element 1, so that the pressure valve The distance from 7 to the outside of the electrolytic capacitor is long. For this reason, the electrolyte solution which is not absorbed by the electrolyte solution absorbent 8 is lost, and the electrolyte solution is not smoked and released outside the electrolytic capacitor.
また、圧力弁７から噴出した電解液の経路は中空部内空間を通じて外部に噴出していく。中空部６ｂの内空間には電解液吸収剤８が収納されているが、圧力弁７が動作して電解液を噴出する箇所に対して、中空部６ｂの内空間の断面積の大きさは、比較的小さく設定されており、かつその中空部６ｂの高さ、すなわち電解コンデンサ外部までの経路は長い。このため、中空部６ｂに収納した電解液吸収剤８を全て、電解液の吸収に寄与させることができる。従って、電解コンデンサにおける電解液搭載量に対し、その搭載量に応じた吸収容量を有する電解液吸収剤８を中空部６ｂに収納すればよい。換言すれば、中空部６ｂの内空間は必要最低限の空間と設計すればよく、必要以上に電解コンデンサが大型化することがない。 Moreover, the path of the electrolyte solution ejected from the pressure valve 7 is ejected to the outside through the space in the hollow portion. The electrolyte absorbent 8 is housed in the inner space of the hollow portion 6b. However, the size of the cross-sectional area of the inner space of the hollow portion 6b with respect to the location where the pressure valve 7 operates to eject the electrolyte solution is as follows. The hollow portion 6b is set to a relatively small height, that is, the path to the outside of the electrolytic capacitor is long. For this reason, all the electrolyte solution absorbent 8 accommodated in the hollow portion 6b can contribute to the absorption of the electrolyte solution. Therefore, the electrolytic solution absorbent 8 having an absorption capacity corresponding to the mounting amount of the electrolytic solution in the electrolytic capacitor may be stored in the hollow portion 6b. In other words, the inner space of the hollow portion 6b may be designed as a minimum necessary space, and the electrolytic capacitor is not increased more than necessary.
０ 電解コンデンサ
１ コンデンサ素子
１ａ 空芯部
１ｂ 電極タブ導出端面
２ 電極タブ
２ａ 陽極タブ
２ｃ 陰極タブ
３ 封口板
３ａ 樹脂板
３ｂ 弾性ゴム
４ａ、４ｂ リベット
５ａ，５ｂ
６ 外装ケース
６ａ 横溝
６ｂ 中空部
６ｃ 頂部
７ 圧力弁
７ａ 弾性体弁
７ｂ 切溝部
８ 電解液吸収剤
Ｌ コンデンサ素子の高さ寸法
Ｃ コンデンサ素子の高さ寸法Ｌの中心位置
Ｈ 頂部の位置
DESCRIPTION OF SYMBOLS 0 Electrolytic capacitor 1 Capacitor element 1a Air core part 1b Electrode tab derivation end surface 2 Electrode tab 2a Anode tab 2c Cathode tab 3 Sealing plate 3a Resin plate 3b Elastic rubber 4a, 4b Rivet 5a, 5b
6 Exterior case 6a Horizontal groove 6b Hollow part 6c Top part 7 Pressure valve 7a Elastic body valve 7b Groove part 8 Electrolyte absorbent L Capacitor element height dimension C Capacitor element height dimension L Center position H Top part position
Claims (2)
外装ケースの外底面から内部に突出し、突出した頂部が、コンデンサ素子の高さ寸法の中心の位置からコンデンサ素子の電極タブ導出端面を超えない位置の間に配置された有底の中空部を形成し、該中空部の頂部に電解コンデンサの内圧が所定値以上に上昇した際に開弁する圧力弁を形成するとともに、前記中空部に電解液吸収剤を収納した電解コンデンサ。 In the electrolytic capacitor formed by impregnating the electrolytic solution into the capacitor element in which the anode foil and the cathode foil are wound through the separator, and storing in the outer case, and sealing the opening end of the outer case,
Projecting inwardly from the outer bottom surface of the outer case, the top portion protruding is, the hollow portion of the deployed bottomed between positions not exceeding electrode tabs out end face of the capacitor element from the position of the center of the height of the capacitor element An electrolytic capacitor formed and formed at the top of the hollow portion to open a pressure valve when the internal pressure of the electrolytic capacitor rises to a predetermined value or more, and the electrolytic solution absorbent is housed in the hollow portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009225267A JP5413586B2 (en) | 2009-09-29 | 2009-09-29 | Electrolytic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009225267A JP5413586B2 (en) | 2009-09-29 | 2009-09-29 | Electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2011077181A JP2011077181A (en) | 2011-04-14 |
| JP5413586B2 true JP5413586B2 (en) | 2014-02-12 |
Family
ID=44020882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009225267A Active JP5413586B2 (en) | 2009-09-29 | 2009-09-29 | Electrolytic capacitor |
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| Country | Link |
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| JP (1) | JP5413586B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220262564A1 (en) * | 2019-07-18 | 2022-08-18 | Tdk Electronics Ag | Capacitor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015119844A1 (en) * | 2015-11-17 | 2017-05-18 | Epcos Ag | Electrolytic condenser with safety vent |
| CN113851327B (en) * | 2021-08-31 | 2023-07-07 | 中山市万东电子科技有限公司 | Film capacitor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7712605A (en) * | 1977-11-16 | 1979-05-18 | Philips Nv | EXPLOSION-PROOF ELECTROLYTIC CONDENSER. |
| JPS5939926U (en) * | 1982-09-08 | 1984-03-14 | 日立コンデンサ株式会社 | capacitor in case |
| JPH0513289A (en) * | 1991-07-04 | 1993-01-22 | Matsushita Electric Ind Co Ltd | Aluminum electrolytic capacitor |
| JP2005210073A (en) * | 2003-12-22 | 2005-08-04 | Nok Corp | Pressure release valve |
-
2009
- 2009-09-29 JP JP2009225267A patent/JP5413586B2/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220262564A1 (en) * | 2019-07-18 | 2022-08-18 | Tdk Electronics Ag | Capacitor |
| US11875941B2 (en) * | 2019-07-18 | 2024-01-16 | Tdk Electronics Ag | Capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011077181A (en) | 2011-04-14 |
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