CN110957137A - Core cladding monomer of laminated high-voltage aluminum electrolytic capacitor with lead-out tabs, preparation method and capacitor - Google Patents
Core cladding monomer of laminated high-voltage aluminum electrolytic capacitor with lead-out tabs, preparation method and capacitor Download PDFInfo
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- CN110957137A CN110957137A CN201911293822.2A CN201911293822A CN110957137A CN 110957137 A CN110957137 A CN 110957137A CN 201911293822 A CN201911293822 A CN 201911293822A CN 110957137 A CN110957137 A CN 110957137A
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 87
- 238000005253 cladding Methods 0.000 title claims abstract description 57
- 239000003990 capacitor Substances 0.000 title claims abstract description 46
- 239000000178 monomer Substances 0.000 title claims description 26
- 238000002360 preparation method Methods 0.000 title claims description 7
- 239000011888 foil Substances 0.000 claims abstract description 131
- 238000005245 sintering Methods 0.000 claims abstract description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 19
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 18
- 239000003792 electrolyte Substances 0.000 claims description 17
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 15
- 239000002985 plastic film Substances 0.000 claims description 14
- 229920006255 plastic film Polymers 0.000 claims description 14
- -1 ammonium dicarboxylic acid esters Chemical class 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- 125000003545 alkoxy group Chemical group 0.000 claims description 9
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000011245 gel electrolyte Substances 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 6
- OTRAYOBSWCVTIN-UHFFFAOYSA-N OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N Chemical compound OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N OTRAYOBSWCVTIN-UHFFFAOYSA-N 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 6
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 6
- 150000003863 ammonium salts Chemical class 0.000 claims description 6
- SATJMZAWJRWBRX-UHFFFAOYSA-N azane;decanedioic acid Chemical compound [NH4+].[NH4+].[O-]C(=O)CCCCCCCCC([O-])=O SATJMZAWJRWBRX-UHFFFAOYSA-N 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- 229940116351 sebacate Drugs 0.000 claims description 6
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims description 5
- 229930195725 Mannitol Natural products 0.000 claims description 5
- 239000000594 mannitol Substances 0.000 claims description 5
- 235000010355 mannitol Nutrition 0.000 claims description 5
- BTJIUGUIPKRLHP-UHFFFAOYSA-N 4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C=C1 BTJIUGUIPKRLHP-UHFFFAOYSA-N 0.000 claims description 4
- WDCYWAQPCXBPJA-UHFFFAOYSA-N 1,3-dinitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC([N+]([O-])=O)=C1 WDCYWAQPCXBPJA-UHFFFAOYSA-N 0.000 claims description 3
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 claims description 3
- CQLCSKMKNLINGZ-UHFFFAOYSA-N 2-hexylhexanedioic acid Chemical compound CCCCCCC(C(O)=O)CCCC(O)=O CQLCSKMKNLINGZ-UHFFFAOYSA-N 0.000 claims description 3
- IQUPABOKLQSFBK-UHFFFAOYSA-N 2-nitrophenol Chemical compound OC1=CC=CC=C1[N+]([O-])=O IQUPABOKLQSFBK-UHFFFAOYSA-N 0.000 claims description 3
- OTLNPYWUJOZPPA-UHFFFAOYSA-N 4-nitrobenzoic acid Chemical compound OC(=O)C1=CC=C([N+]([O-])=O)C=C1 OTLNPYWUJOZPPA-UHFFFAOYSA-N 0.000 claims description 3
- FLDCSPABIQBYKP-UHFFFAOYSA-N 5-chloro-1,2-dimethylbenzimidazole Chemical compound ClC1=CC=C2N(C)C(C)=NC2=C1 FLDCSPABIQBYKP-UHFFFAOYSA-N 0.000 claims description 3
- 239000001741 Ammonium adipate Substances 0.000 claims description 3
- DHCVPPHPQUDSLT-UHFFFAOYSA-N C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+] Chemical compound C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].C(CCCCCCCCCCC)(=O)[O-].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+] DHCVPPHPQUDSLT-UHFFFAOYSA-N 0.000 claims description 3
- BNUHAJGCKIQFGE-UHFFFAOYSA-N Nitroanisol Chemical compound COC1=CC=C([N+]([O-])=O)C=C1 BNUHAJGCKIQFGE-UHFFFAOYSA-N 0.000 claims description 3
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000001361 adipic acid Substances 0.000 claims description 3
- 235000011037 adipic acid Nutrition 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- GJYJYFHBOBUTBY-UHFFFAOYSA-N alpha-camphorene Chemical compound CC(C)=CCCC(=C)C1CCC(CCC=C(C)C)=CC1 GJYJYFHBOBUTBY-UHFFFAOYSA-N 0.000 claims description 3
- 235000019293 ammonium adipate Nutrition 0.000 claims description 3
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 claims description 3
- 229940067597 azelate Drugs 0.000 claims description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004327 boric acid Substances 0.000 claims description 3
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims description 3
- BNMJSBUIDQYHIN-UHFFFAOYSA-N butyl dihydrogen phosphate Chemical compound CCCCOP(O)(O)=O BNMJSBUIDQYHIN-UHFFFAOYSA-N 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 3
- 150000001733 carboxylic acid esters Chemical class 0.000 claims description 3
- SVKRTZCBJZSUJT-UHFFFAOYSA-N diazanium;octanedioate Chemical compound [NH4+].[NH4+].[O-]C(=O)CCCCCCC([O-])=O SVKRTZCBJZSUJT-UHFFFAOYSA-N 0.000 claims description 3
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 claims description 3
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 3
- JKTYGPATCNUWKN-UHFFFAOYSA-N 4-nitrobenzyl alcohol Chemical compound OCC1=CC=C([N+]([O-])=O)C=C1 JKTYGPATCNUWKN-UHFFFAOYSA-N 0.000 claims description 2
- 238000009461 vacuum packaging Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 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 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
-
- 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
- H01G9/004—Details
- H01G9/008—Terminals
-
- 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
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
- H01G9/10—Sealing, e.g. of lead-in wires
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
A laminated high-voltage aluminum electrolytic capacitor with lead-out tabs comprises a plurality of core cladding units, wherein the core cladding units are connected in series or in parallel and are packaged in a shell; the core package unit comprises anode foil, electrolytic paper and cathode foil, and the anode foil, the electrolytic paper and the cathode foil are folded to form a core package; the anode foil comprises an aluminum foil body and an anode tab; a layer of sintered aluminum powder is formed on the surface of the aluminum foil body in a sintering mode, and an anode tab is left white; the cathode foil comprises an aluminum foil body and a cathode tab; the anode tab and the cathode tab extend out of the core package. The laminated high-voltage aluminum electrolytic capacitor with the lead-out tabs has the characteristics of convenient combination and high voltage resistance. In the embodiment, the current of the core package is led out in the form of the tab, and the tab of the embodiment is integrally formed without riveting or welding when being connected to the anode foil, so that the tab has stronger current collecting capability compared with the conventional lead foil strip, and the anode foil cannot be damaged without riveting or welding.
Description
Technical Field
The invention relates to a high-voltage aluminum electrolytic capacitor, in particular to a laminated high-voltage aluminum electrolytic capacitor with lead-out lugs and a preparation method thereof.
Background
The traditional aluminum electrolytic capacitor mostly adopts a winding core bag, and after impregnation, the aluminum electrolytic capacitor is assembled and molded by using accessories such as an aluminum shell, a rubber plug and the like. With the miniaturization and flattening of electronic products, the traditional cylindrical aluminum electrolytic capacitor has no advantage in space utilization rate and restricts the development trend of the miniaturization and flattening of the electronic products. And the capacity of the existing capacitor is fixed, so that the capacitor is very inconvenient when a plurality of capacitors are used in series or in parallel when the capacitor is used by a client. Patent No. 201610772313.8, a high-voltage laminated aluminum electrolytic capacitor and a method for manufacturing the same, provides a core cladding unit, so that a plurality of core cladding units can be conveniently combined; however, the anode foil guiding strip and the cathode foil guiding strip in this patent are riveted or welded to the anode foil and the cathode foil, respectively, which tends to increase the thickness of the core package unit, and to destroy the structure of the anode foil and the cathode foil when riveted or welded, and the current collection of the anode foil guiding strip and the cathode foil guiding strip can be weak due to riveting or welding, so that the ability to withstand the ripple current is weak.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a laminated high-voltage aluminum electrolytic capacitor which is convenient to combine and has strong current collecting capability and a lead-out lug and a preparation method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a core cladding unit of a laminated high-voltage aluminum electrolytic capacitor with a tab led out comprises a core cladding unit, wherein the core cladding unit comprises anode foil, electrolytic paper and cathode foil, and the anode foil, the electrolytic paper and the cathode foil are folded to form a core cladding; the anode foil comprises an aluminum foil body and an anode tab; coating a layer of aluminum powder on the surface of the aluminum foil body, sintering and forming a layer of sintered aluminum powder, and leaving a white anode tab; the cathode foil comprises an aluminum foil body and a cathode tab; the anode tab and the cathode tab extend out of the core bag.
Preferably, the core cladding unit of the laminated high-voltage aluminum electrolytic capacitor with the lead-out tabs is subjected to vacuum plastic package by an aluminum-plastic film, and the anode lead tabs and the cathode lead tabs extend out of the aluminum-plastic film.
Preferably, the anode tab and the cathode tab are both directly led out from the aluminum foil body to form a full tab; the anode tabs and the cathode tabs are arranged in a staggered mode, so that the anode tabs and the cathode tabs respectively extend out of the core bag at two sides of the core bag.
The core package monomer of the laminated high-voltage aluminum electrolytic capacitor with the lead-out tabs is preferably characterized in that the aluminum foil body of the anode foil and the aluminum foil body of the cathode foil are the same in size, the length or the width of the electrolytic paper is greater than that of the aluminum foil body of the anode foil, and the aluminum foil body of the anode foil and the aluminum foil body of the cathode foil are separated by the electrolytic paper and are located on the inner sides of the electrolytic paper.
A method for preparing a core cladding monomer of a laminated high-voltage aluminum electrolytic capacitor with lead-out lugs comprises the following steps,
1) intermittently coating the whole aluminum foil and then sintering the aluminum powder to ensure that a sintered aluminum powder layer is intermittently sintered on the aluminum foil; cutting to form an anode foil, and forming a blank anode foil on the anode foil; cutting the corresponding cathode foil according to the shape of the anode foil;
2) folding the anode foil, the electrolytic paper and the cathode foil to form a core cladding unit, and impregnating the core cladding unit with electrolyte;
3) the core cladding unit is subjected to vacuum plastic package in an aluminum plastic film; the anode tab and the cathode tab extend out of the aluminum-plastic film to form a core cladding monomer;
4) and packaging the core cladding units in the shell after the core cladding units are connected in series or in parallel, and electrically leading the anode tab and the cathode tab out of the shell.
In the preparation method of the core cladding monomer of the laminated high-voltage aluminum electrolytic capacitor with the lead-out tabs, preferably, the electrolyte comprises 50-80 parts of solvent, 10-40 parts of main solute, 0-10 parts of auxiliary solute, 10-40 parts of multi-branched ammonium salt containing alkoxy and 1-5 parts of water; the multi-branched ammonium salt includes multi-branched ammonium dicarboxylic acid esters, multi-branched ammonium tricarboxylic acid esters, multi-branched ammonium tetracarboxylic acid esters and multi-branched ammonium hexahydric carboxylic acid esters, and has alkoxy groups on side chains thereof, and the number of carbon atoms between two carboxyl groups is equal to or greater than sixteen.
In the above method for preparing the core cladding monomer of the laminated high-voltage aluminum electrolytic capacitor with the tab led out, preferably, the solvent includes one or more of ethylene glycol, mannitol, n-butanol, glycerol, diethylene glycol, polyethylene glycol, polyvinyl alcohol and diethylene glycol;
the solute comprises one or more of succinic acid, glutaric acid, adipic acid, ammonium adipate, ammonium suberate, ammonium azelate, ammonium sebacate, ammonium 1, 7-sebacate, ammonium isosebacate, ammonium alkyl sebacate, ammonium dodecalaurate and 2-hexyl adipic acid;
the secondary solute comprises one or more of boric acid, polyvinyl alcohol, polyethylene glycol, butyl phosphate, monobutyl phosphate, ammonium pentaborate, phthalic acid, terephthalic acid and citric acid.
In the above method for preparing the core package monomer of the laminated high-voltage aluminum electrolytic capacitor with the tab led out, preferably, the electrolyte further comprises 0.1-1 part of an additive, wherein the additive comprises one or more of p-nitrophenol, o-nitrophenol, m-dinitrobenzene, p-nitrobenzoic acid, p-nitroanisole or p-nitrobenzol, and ammonium hypophosphite.
In the preparation method of the core cladding monomer of the laminated high-voltage aluminum electrolytic capacitor with the lead-out tabs, preferably, the electrolyte is gel electrolyte.
A laminated high-voltage aluminum electrolytic capacitor with a tab led out comprises a plurality of core cladding monomers, wherein the core cladding monomers are connected in series or in parallel and are packaged in a shell.
Compared with the prior art, the invention has the advantages that: in the invention, the core cladding unit is electrically led out through the anode tab and the cathode tab, and the anode tab, the cathode tab and the aluminum foil body are integrally formed, so that the problem of connection does not exist, and the thickness of the core cladding unit is not increased. Compared with a riveting or welding mode, the current collecting capacity is higher, and the ripple current resistance of the core cladding unit is higher. In the invention, a plurality of core package units can be selected to be connected in series or in parallel and then are packaged in the shell, so that the core package units can be conveniently combined.
Drawings
Fig. 1 is a schematic structural diagram of a core cladding unit in a laminated high-voltage aluminum electrolytic capacitor led out of a pole ear in example 1.
Fig. 2 is a schematic structural diagram of a core cladding unit in the laminated high-voltage aluminum electrolytic capacitor with fully-extended tabs in embodiment 1.
Fig. 3 is a schematic structural diagram of a plurality of core packing units connected in series in example 1.
Description of the figures
1. An anode foil; 2. an anode tab; 3. a cathode foil; 4. a cathode tab; 5, electrolyzing paper; 6. a core wrap monomer.
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.
It should be particularly noted that when an element is referred to as being "fixed to, connected to or communicated with" another element, it can be directly fixed to, connected to or communicated with the other element or indirectly fixed to, connected to or communicated with the other element through other intermediate connecting components.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Example 1
A laminated high-voltage aluminum electrolytic capacitor with lead-out tabs comprises a plurality of core cladding units, wherein the core cladding units are connected in series or in parallel and are packaged in a shell; the core package unit comprises anode foil, electrolytic paper and cathode foil, wherein the anode foil, the electrolytic paper and the cathode foil are folded to form the core package and then the core package is wound by the electrolytic paper for at least one circle; the anode foil comprises an aluminum foil body and an anode tab; coating aluminum powder on the surface of the aluminum foil body, sintering to form a layer of sintered aluminum powder, and leaving a white anode tab; the cathode foil comprises an aluminum foil body and a cathode tab; the anode tab and the cathode tab extend out of the core bag.
In the invention, the core cladding unit is subjected to vacuum plastic package by the aluminum-plastic film, and the anode tab and the cathode tab extend out of the aluminum-plastic film. The anode tab and the cathode tab are both directly led out from the aluminum foil body to form a full tab. The anode tabs and the cathode tabs are arranged in a staggered mode, so that the anode tabs and the cathode tabs respectively extend out of the core bag at two sides of the core bag. The porosity of the sintered aluminum layer on the anode foil is 10-50%, and the total thickness of the aluminum powder layer is 50-500 μm.
In the present invention, the sintering of the sintered aluminum powder layer can be performed by sintering in patent No. 200880128783.4, an electrode material for aluminum electrolytic capacitor and a method for manufacturing the electrode material. When sintering is carried out, the aluminum foil is intermittently sintered with a sintered aluminum powder layer, cutting is carried out after sintering, and the part left with white is cut into an anode tab when cutting, so that the cut anode foil is led out from the anode tab. The white part is the position where the sintered aluminum powder layer is not sintered.
In the invention, the aluminum foil body of the anode foil and the aluminum foil body of the cathode foil are the same in size, the length or width of the electrolytic paper is larger than that of the aluminum foil body of the anode foil, and the aluminum foil body of the anode foil and the aluminum foil body of the cathode foil are separated by the electrolytic paper and are positioned on the inner side of the electrolytic paper.
The invention provides a method for preparing a laminated high-voltage aluminum electrolytic capacitor with lead-out lugs, which comprises the following steps,
1) intermittently coating a layer of aluminum powder on a whole aluminum foil, and then sintering the aluminum powder to ensure that a sintered aluminum powder layer is intermittently sintered on the aluminum foil; cutting to form an anode foil, and forming a blank anode foil on the anode foil; cutting the corresponding cathode foil according to the shape of the anode foil;
2) folding the anode foil, the electrolytic paper and the cathode foil to form a core cladding unit, and impregnating the core cladding unit with electrolyte;
3) the core cladding unit is subjected to vacuum plastic package in an aluminum plastic film; the anode tab and the cathode tab extend out of the aluminum-plastic film to form a core cladding monomer;
4) and packaging the core cladding units in the shell after the core cladding units are connected in series or in parallel, and electrically leading the anode tab and the cathode tab out of the shell.
In the present invention, the electrolyte comprises 50 to 80 parts of a solvent, 5 to 20 parts of a main solute, 0 to 10 parts of a secondary solute, 10 to 40 parts of a multi-branched ammonium salt containing an alkoxy group, and 1 to 5 parts of water; the multi-branched ammonium salt includes multi-branched ammonium dicarboxylic acid esters, multi-branched ammonium tricarboxylic acid esters, multi-branched ammonium tetracarboxylic acid esters and multi-branched ammonium hexahydric carboxylic acid esters, and has alkoxy groups on side chains thereof, and the number of carbon atoms between two carboxyl groups is equal to or greater than sixteen.
In the present invention, the solvent includes one or more of ethylene glycol, mannitol, n-butanol, glycerol, diethylene glycol, polyethylene glycol, polyvinyl alcohol, and diethylene glycol;
the solute comprises one or more of succinic acid, glutaric acid, adipic acid, ammonium adipate, ammonium suberate, ammonium azelate, ammonium sebacate, ammonium 1, 7-sebacate, ammonium isosebacate, ammonium alkyl sebacate, ammonium dodecalaurate and 2-hexyl adipic acid;
the secondary solute comprises one or more of boric acid, polyvinyl alcohol, polyethylene glycol, butyl phosphate, monobutyl phosphate, ammonium pentaborate, phthalic acid, terephthalic acid and citric acid.
In the invention, the electrolyte also comprises 0.1-1 part of additive, and the additive comprises one or more of p-nitrophenol, o-nitrophenol, m-dinitrobenzene, p-nitrobenzoic acid, p-nitroanisole or p-nitrobenzyl alcohol, and ammonium hypophosphite.
Example 1
As shown in fig. 3, the laminated high-voltage aluminum electrolytic capacitor with the tab led out is formed by connecting a plurality of core cladding units 6 in series, wherein each core cladding unit 6 comprises a core cladding unit; the core bag units formed by connecting the plurality of core bag monomers in series are encapsulated in the shell; as shown in fig. 1, the core package unit comprises an anode foil 1, an electrolytic paper 5 and a cathode foil 3, wherein the anode foil 1, the electrolytic paper 5 and the cathode foil 3 are folded to form the core package; the anode foil 1 comprises an aluminum foil body and an anode tab 2; coating aluminum powder on the surface of the aluminum foil body, then sintering and forming to form a layer of sintered aluminum powder, and leaving a white anode tab 2; the porosity of the sintered aluminum layer on the anode foil 1 is 10-50%, and the total thickness of the aluminum powder layer is 50-500 μm. The cathode foil 3 comprises an aluminum foil body and a cathode tab 4, and sintered aluminum is not arranged on the cathode foil 3; the anode tab 2 and the cathode tab 4 extend out of the core package. In this embodiment, a half tab is adopted, and in other embodiments, the width of the anode tab and the cathode tab may be the same as the width of the aluminum foil body, that is, the form of a full tab, but when the form of the full tab is adopted, as best shown in fig. 2, the anode tab and the cathode tab are led out from different sides of the core package.
In this embodiment, the core cladding unit is vacuum-sealed by an aluminum-plastic film, and the anode tab and the cathode tab extend out of the aluminum-plastic film.
In this example, the core pack is impregnated with an electrolyte solution including 70 parts of ethylene glycol, 5 parts of ammonium sebacate, 2 parts of mannitol, 5 parts of ammonium pentaborate, 20 parts of multi-branched ammonium tricarboxylate containing an alkoxy group, and 0.5 part of water. In this embodiment, ethylene glycol and mannitol are used as solvents, ammonium sebacate is used as a main solute, and ammonium pentaborate is used as an auxiliary solute. In this embodiment, ammonium sebacate and ammonium pentaborate can effectively reduce the conductivity of the electrolyte, thereby improving the sparking voltage of the electrolyte. The multi-branched ammonium tricarboxylate is multi-branched ammonium tricarboxylate containing alkoxy, and oxygen ions are generated by electrolysis at high pressure, so that cations can be provided for repairing an oxide film on the surface of the anode foil, and the high pressure resistance of the capacitor is further improved. The water is added to provide oxygen ions for repairing the anodic oxide film under the condition of electrifying, the conductivity of the electrolyte is increased by adding the water, so the amount of the water needs to be controlled, and hydrogen ions are generated when electrolyzing the water, so that 0.2 part of p-nitrophenol can be added into the electrolyte to play a role in removing hydrogen.
The electrolyte of the present embodiment has a conductivity of (500-680) × 10-6S/cm, and the flash voltage can reach as high as 700V under the action of multi-branched ammonium tricarboxylate containing alkoxy.
The laminated high-voltage aluminum electrolytic capacitor with the lead-out tabs has the advantages of convenience in combination and high voltage resistance. In the embodiment, the current of the core package is led out in the form of the tab, and the tab of the embodiment is integrally formed without riveting or welding when being connected to the anode foil, so that the tab has stronger current collecting capability compared with the conventional lead foil strip, and the anode foil cannot be damaged without riveting or welding, especially when the anode foil is made of sintered aluminum powder foil.
Example 2
In this embodiment, the electrolyte may be a gel electrolyte, and the gel electrolyte may be the gel electrolyte disclosed in patent No. 201711316140.X, the gel electrolyte and the method for manufacturing an aluminum electrolytic capacitor. The excellent flame retardant property of the gel electrolyte is very suitable for application in high-voltage aluminum electrolytic capacitors.
Claims (10)
1. A core cladding monomer of a laminated high-voltage aluminum electrolytic capacitor with lead-out tabs is characterized in that: the core bag unit comprises an anode foil, an electrolytic paper and a cathode foil, wherein the anode foil, the electrolytic paper and the cathode foil are folded to form the core bag; the anode foil comprises an aluminum foil body and an anode tab; coating a layer of aluminum powder on the surface of the aluminum foil body, sintering and forming a layer of sintered aluminum powder, and leaving a white anode tab; the cathode foil comprises an aluminum foil body and a cathode tab; the anode tab and the cathode tab extend out of the core bag.
2. The core cladding monomer of the laminated high-voltage aluminum electrolytic capacitor with the lead-out tabs according to claim 1, is characterized in that: the core cladding unit is formed by plastic vacuum packaging of an aluminum-plastic film, and an anode tab and a cathode tab extend out of the aluminum-plastic film.
3. The core cladding monomer of the laminated high-voltage aluminum electrolytic capacitor with the lead-out tabs according to claim 1, is characterized in that: the anode tab and the cathode tab are both directly led out from the aluminum foil body to form a full tab; the anode tabs and the cathode tabs are arranged in a staggered mode, so that the anode tabs and the cathode tabs respectively extend out of the core bag at two sides of the core bag.
4. The core cladding monomer of the laminated high-voltage aluminum electrolytic capacitor with the lead-out tabs according to claim 1, is characterized in that: the size of the aluminum foil body of the anode foil is the same as that of the aluminum foil body of the cathode foil, the length or the width of the electrolytic paper is larger than that of the aluminum foil body of the anode foil, and the aluminum foil body of the anode foil and the aluminum foil body of the cathode foil are separated by the electrolytic paper and are positioned on the inner side of the electrolytic paper.
5. The preparation method of the core cladding monomer of the laminated high-voltage aluminum electrolytic capacitor with the lead-out lugs as claimed in any one of claims 1 to 4, is characterized in that: comprises the following steps of (a) carrying out,
1) intermittently sintering aluminum powder on a whole aluminum foil to enable a sintered aluminum powder layer to be intermittently sintered on the aluminum foil; cutting to form an anode foil, and forming a blank anode foil on the anode foil; cutting the corresponding cathode foil according to the shape of the anode foil;
2) folding the anode foil, the electrolytic paper and the cathode foil to form a core cladding unit, and impregnating the core cladding unit with electrolyte;
3) the core cladding unit is subjected to vacuum plastic package in an aluminum plastic film; the anode tab and the cathode tab extend out of the aluminum-plastic film to form a core cladding monomer;
4) and packaging the core cladding units in the shell after the core cladding units are connected in series or in parallel, and electrically leading the anode tab and the cathode tab out of the shell.
6. The method for preparing the core cladding monomer of the laminated high-voltage aluminum electrolytic capacitor led out of the pole ear according to claim 5, is characterized in that: the electrolyte comprises 50-80 parts of solvent, 10-40 parts of main solute, 0-10 parts of secondary solute, 10-40 parts of multi-branched-chain ammonium salt containing alkoxy and 1-5 parts of water; the multi-branched ammonium salt includes multi-branched ammonium dicarboxylic acid esters, multi-branched ammonium tricarboxylic acid esters, multi-branched ammonium tetracarboxylic acid esters and multi-branched ammonium hexahydric carboxylic acid esters, and has alkoxy groups on side chains thereof, and the number of carbon atoms between two carboxyl groups is equal to or greater than sixteen.
7. The method for preparing the core cladding monomer of the laminated high-voltage aluminum electrolytic capacitor led out of the pole ear according to claim 6, is characterized in that: the solvent comprises one or more of ethylene glycol, mannitol, n-butanol, glycerol, diethylene glycol, polyethylene glycol, polyvinyl alcohol and diethylene glycol;
the solute comprises one or more of succinic acid, glutaric acid, adipic acid, ammonium adipate, ammonium suberate, ammonium azelate, ammonium sebacate, ammonium 1, 7-sebacate, ammonium isosebacate, ammonium alkyl sebacate, ammonium dodecalaurate and 2-hexyl adipic acid;
the secondary solute comprises one or more of boric acid, polyvinyl alcohol, polyethylene glycol, butyl phosphate, monobutyl phosphate, ammonium pentaborate, phthalic acid, terephthalic acid and citric acid.
8. The method for preparing the core cladding monomer of the laminated high-voltage aluminum electrolytic capacitor led out of the pole ear according to claim 6, is characterized in that: the electrolyte also comprises 0.1-1 part of additive, wherein the additive comprises one or more of p-nitrophenol, o-nitrophenol, m-dinitrobenzene, p-nitrobenzoic acid, p-nitroanisole or p-nitrobenzyl alcohol and ammonium hypophosphite.
9. The method for preparing the core cladding monomer of the laminated high-voltage aluminum electrolytic capacitor led out of the pole ear according to claim 5, is characterized in that: the electrolyte is gel electrolyte.
10. A laminated high-voltage aluminum electrolytic capacitor with lead-out tabs is characterized in that: comprising a plurality of core monomers of any of claims 1-4, the plurality of core monomers being connected in series or in parallel and encapsulated within an outer shell.
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