CN113517138A - Method for reducing working internal pressure of aluminum electrolytic capacitor by using hydrogen storage alloy - Google Patents
Method for reducing working internal pressure of aluminum electrolytic capacitor by using hydrogen storage alloy Download PDFInfo
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- CN113517138A CN113517138A CN202110730459.7A CN202110730459A CN113517138A CN 113517138 A CN113517138 A CN 113517138A CN 202110730459 A CN202110730459 A CN 202110730459A CN 113517138 A CN113517138 A CN 113517138A
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- electrolytic capacitor
- acid
- aluminum electrolytic
- ammonium
- hydrogen storage
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- 239000003990 capacitor Substances 0.000 title claims abstract description 105
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 88
- 239000001257 hydrogen Substances 0.000 title claims abstract description 88
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 239000000956 alloy Substances 0.000 title claims abstract description 79
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 76
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 70
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003792 electrolyte Substances 0.000 claims abstract description 64
- 238000004804 winding Methods 0.000 claims abstract description 46
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- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 28
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 27
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 239000000654 additive Substances 0.000 claims description 18
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 18
- 239000002904 solvent Substances 0.000 claims description 18
- 230000000996 additive effect Effects 0.000 claims description 17
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 14
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 claims description 14
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- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 13
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- CKKXWJDFFQPBQL-UAIGNFCESA-N diazanium;(z)-but-2-enedioate Chemical compound [NH4+].[NH4+].[O-]C(=O)\C=C/C([O-])=O CKKXWJDFFQPBQL-UAIGNFCESA-N 0.000 claims description 11
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- SVKRTZCBJZSUJT-UHFFFAOYSA-N diazanium;octanedioate Chemical compound [NH4+].[NH4+].[O-]C(=O)CCCCCCC([O-])=O SVKRTZCBJZSUJT-UHFFFAOYSA-N 0.000 claims description 10
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 10
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- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 10
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- XTWYTFMLZFPYCI-KQYNXXCUSA-N 5'-adenylphosphoric acid Chemical compound C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](COP(O)(=O)OP(O)(O)=O)[C@@H](O)[C@H]1O XTWYTFMLZFPYCI-KQYNXXCUSA-N 0.000 claims description 8
- 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 8
- 229930195725 Mannitol Natural products 0.000 claims description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 8
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 8
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 8
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 8
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 claims description 8
- 239000000594 mannitol Substances 0.000 claims description 8
- 235000010355 mannitol Nutrition 0.000 claims description 8
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 8
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 8
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 claims description 8
- 239000011975 tartaric acid Substances 0.000 claims description 8
- 235000002906 tartaric acid Nutrition 0.000 claims description 8
- 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 6
- 239000001741 Ammonium adipate Substances 0.000 claims description 6
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- GPEVMRFAFMVKHK-UHFFFAOYSA-N azane;dodecanedioic acid Chemical compound [NH4+].[NH4+].[O-]C(=O)CCCCCCCCCCC([O-])=O GPEVMRFAFMVKHK-UHFFFAOYSA-N 0.000 claims description 6
- 239000005711 Benzoic acid Substances 0.000 claims description 5
- 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 5
- 235000010233 benzoic acid Nutrition 0.000 claims description 5
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- 239000004327 boric acid Substances 0.000 claims description 5
- 229910052746 lanthanum Inorganic materials 0.000 claims description 5
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 5
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 claims description 5
- SVTBMSDMJJWYQN-UHFFFAOYSA-N 2-methylpentane-2,4-diol Chemical compound CC(O)CC(C)(C)O SVTBMSDMJJWYQN-UHFFFAOYSA-N 0.000 claims description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 4
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- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 4
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- 235000011037 adipic acid Nutrition 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- VZTDIZULWFCMLS-UHFFFAOYSA-N ammonium formate Chemical compound [NH4+].[O-]C=O VZTDIZULWFCMLS-UHFFFAOYSA-N 0.000 claims description 4
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- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 4
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- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 4
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims description 4
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 4
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 4
- 239000012498 ultrapure water Substances 0.000 claims description 4
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 3
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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
-
- 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
-
- 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
- H01G9/04—Electrodes or formation of dielectric layers thereon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
A method for reducing the working internal pressure of an aluminum electrolytic capacitor by using hydrogen storage alloy comprises the steps of sequentially stacking electrolytic paper, a cathode sheet, a hydrogen storage alloy sheet, the electrolytic paper and an anode sheet from bottom to top, then winding to form a winding core, and filling electrolyte into the winding core to form the aluminum electrolytic capacitor. The invention uses hydrogen storage alloy, can avoid the corrosion of the hydrogen absorbing agent to the electrode leading-out strip, and the hydrogen absorbing amount per gram is improved by 1000 times, thereby greatly increasing the service life which is more than 2 times of the original service life; the method can also improve the boosting capacity and the oxidation efficiency of the electrolyte, is beneficial to repairing the anodic oxide film of the aluminum electrolytic capacitor, and can improve the self-healing characteristic of the aluminum electrolytic capacitor, thereby improving the frequency characteristic and reducing the loss and the leakage current.
Description
Technical Field
The invention belongs to the field of aluminum electrolytic capacitors, and particularly relates to a method for reducing the working internal pressure of an aluminum electrolytic capacitor by using a hydrogen storage alloy.
Background
As the working electrolyte of the practical cathode of the aluminum electrolytic capacitor, the performance directly influences the service temperature range and the service life of the capacitor and the reliability of the capacitor. Nowadays, electrolytic capacitors are developed towards high quality and long life, and the requirements of different working environments on working electrolytes are higher and higher.
During the operation of the capacitor, the failure mode is mainly represented in three aspects: firstly, the core of the capacitor is dried, which is characterized in that the electric performance is that the negative capacitance exceeds the standard and the loss tangent value exceeds the standard; secondly, the internal pressure of the capacitor is overlarge, and the explosion-proof valve is opened; and thirdly, the electrode lead-out strip of the capacitor is corroded to cause the open circuit of the capacitor. The three failure modes are respectively shown in different series of capacitors, and the second failure mode is mainly used for miniaturized high-voltage capacitors. While the internal pressure of the capacitor is mainly derived from the hydrogen generated by the operation. Therefore, the hydrogen absorption capacity of the working electrolyte is particularly important.
In order to reduce the internal pressure, a hydrogen absorbing agent such as: one or more of resorcinol, p-nitrobenzoic acid, p-nitrobenzyl alcohol, m-nitroacetophenone, p-nitrophenol, o-nitroanisole, p-benzoquinone dinitrobenzene and dinitrophenol, but the hydrogen absorbing agent has low hydrogen absorbing efficiency, small hydrogen absorbing amount, toxicity, environmental pollution, reduction of flash fire voltage and conductivity of electrolyte, corrosion of an electrode lead-out strip to cause open circuit and the like, and has some negative effects on a capacitor.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a method for reducing the working internal pressure of an aluminum electrolytic capacitor by using a hydrogen storage alloy.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for reducing the working internal pressure of an aluminum electrolytic capacitor by using hydrogen storage alloy comprises the steps of sequentially stacking electrolytic paper, a cathode sheet, a hydrogen storage alloy sheet, the electrolytic paper and an anode sheet from bottom to top, then winding to form a winding core, and filling electrolyte into the winding core to form the aluminum electrolytic capacitor.
The invention is further improved in that the hydrogen storage alloy sheet is a hydrogen storage alloy material containing no hydrogen.
The further improvement of the invention is that the electrolyte comprises 6 to 20 percent of solute, 70 to 90 percent of solvent and 0.3 to 15 percent of additive by mass percent.
In a further refinement of the invention, the solute is one or more of adipic acid, ammonium adipate, formic acid, ammonium formate, maleic acid, benzoic acid, boric acid, ammonium pentaborate, succinic acid, ammonium succinate, sebacic acid, suberic acid, ammonium suberate, azelaic acid, dodecanedioic acid, and ammonium dodecanedioate.
In a further improvement of the invention, the solvent is one or more of ultrapure water, propanol, ethylene glycol, diethylene glycol, hexylene glycol, glycerol, mannitol, glycerol, N-dimethylformamide, N-diethylformamide, N-dimethylacetamide and gamma-butyrolactone.
The invention has the further improvement that the additive comprises a waterproof agent, a sparking voltage improver and a performance improver, wherein the mass percent of the waterproof agent in the electrolyte is 0.1-9%, the mass percent of the sparking voltage improver is 0.1-9%, and the mass percent of the performance improver in the electrolyte is 0.1-9%.
The invention further improves that the waterproof agent is one or more of phosphoric acid, ammonium dihydrogen phosphate, hypophosphorous acid and ADP;
the flash voltage booster is one or more of ethylene oxide, citric acid, ammonium dichromate and tartaric acid;
the performance improver is one or more of boron oxide, ammonium maleate, sorbitol and ethylene glycol.
The present invention is further improved in that the hydrogen absorbing alloy sheet has a thickness of 0.04mm or less.
The further improvement of the invention is that the width of the hydrogen storage alloy sheet is the same as that of the cathode sheet, and the length of the hydrogen storage alloy sheet is less than or equal to 2 percent of that of the cathode sheet.
The invention is further improved in that the hydrogen storage alloy is LaNi5、LaNi5-xAx，MmNi5、TiNi、Ti2Ni、Mg2Ni、Mg2Cu and ZrMn2One or more of (a); wherein, A ═ Al, Mn, Co or Cu, x ═ 1, 2, 3 or 4, and Mm is one or more of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium and yttrium.
Compared with the prior art, the invention has the following beneficial effects:
the hydrogen storage alloy is added between the electrolytic paper and the cathode, compared with the traditional method adopting a hydrogen absorbing agent, the method adopts the hydrogen storage alloy, does not corrode an electrode leading-out strip, and improves the hydrogen absorbing amount per gram by 1000 times, thereby effectively reducing the internal pressure of the capacitor, greatly prolonging the service life and the reliability, wherein the service life is more than 2 times of the original service life; the invention also improves the boosting capacity and the oxidation efficiency of the electrolyte, is beneficial to the repair of the anodic oxide film of the aluminum electrolytic capacitor and improves the self-healing characteristic of the aluminum electrolytic capacitor, thereby improving the frequency characteristic and reducing the loss and the leakage current; the hydrogen absorption agent is not contained in the invention, so that the use of organic matters can be reduced, and the pollution to the environment can be reduced.
Drawings
FIG. 1 is a schematic view of an aluminum electrolytic capacitor using a hydrogen occluding alloy according to the present invention.
FIG. 2 is a schematic view of an aluminum electrolytic capacitor not using a hydrogen storage alloy.
In the figure, 1 is an anode sheet, 2 is a cathode sheet, 3 is electrolytic paper, 4 is a hydrogen storage alloy sheet, 5 is an anode pin, and 6 is a cathode pin.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The electrolytic capacitor containing the hydrogen storage alloy prepared by the invention is put into a life load experiment. In the use of the electrolytic capacitor, it is generally considered that when the internal pressure is increased to 500% or more of the external air pressure, the capacitor fails, and the time taken for the internal pressure of the capacitor to rise to 500% of the external air pressure is the life of the capacitor.
Referring to fig. 1, the method for reducing the working internal pressure of the aluminum electrolytic capacitor by using the hydrogen storage alloy of the present invention comprises: sequentially superposing the electrolytic paper 3, the cathode sheet 2, the hydrogen storage alloy sheet 4, the electrolytic paper 3 and the anode sheet 1 from bottom to top, and then winding to form a winding core, wherein the winding core is filled with electrolyte to form the aluminum electrolytic capacitor.
The aluminum electrolytic capacitor manufactured by the invention comprises a roll core, wherein electrolyte is filled in the roll core; the winding core comprises an anode sheet 1, a cathode sheet 2, electrolytic paper 3 and a hydrogen storage alloy sheet 4.
The electrolyte comprises 6-20% of solute, 70-90% of solvent and 0.3-15% of additive by mass percent.
The solute is one or more of adipic acid, ammonium adipate, formic acid, ammonium formate, maleic acid, benzoic acid, boric acid, ammonium pentaborate, succinic acid, ammonium succinate, sebacic acid, suberic acid, ammonium suberate, azelaic acid, dodecanedioic acid and ammonium dodecanedioate;
the solvent is one or more of ultrapure water, propanol, ethylene glycol, diethylene glycol, hexanediol, glycerol, mannitol, glycerol, N-dimethylformamide, N-diethylformamide, N-dimethylacetamide and gamma-butyrolactone;
the additive comprises a waterproof agent, a sparking voltage improver and a performance improver, wherein the waterproof agent accounts for 0.1-9% by mass, the sparking voltage improver accounts for 0.1-9% by mass, and the performance improver accounts for 0.1-9% by mass;
the waterproof agent is one or more of phosphoric acid, ammonium dihydrogen phosphate, hypophosphorous acid and ADP;
the flash voltage booster is one or more of ethylene oxide, citric acid, ammonium dichromate, tartaric acid and ammonium tartrate;
the performance improver is one or more of boron oxide for preventing electrode corrosion, ammonium maleate and sorbitol for improving formation characteristics, and ethylene glycol for improving low temperature characteristics.
No hydrogen absorbing agent is added into the electrolyte;
the hydrogen storage alloy sheet is one or more net-shaped or strip-shaped hydrogen storage alloy materials without hydrogen.
The hydrogen storage alloy sheet and the cathode sheet 2 are riveted on the cathode pin 6, and the anode sheet 1 is riveted on the anode pin 5.
The thickness of the hydrogen absorbing alloy sheet is not more than 0.04 mm.
The width of the hydrogen storage alloy sheet is the same as that of the cathode sheet, and the length of the hydrogen storage alloy sheet is less than or equal to 2 percent of that of the cathode sheet.
The hydrogen storage alloy is LaNi5、LaNi5-xAx(A ═ Al, Mn, Co, Cu or the like, x ═ 1, 2, 3, 4), MmNi5(Mm is one of rare earth elements of lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), scandium (Sc) and yttrium (Y)One or more) of Ti, Ni2Ni、Mg2Ni、Mg2Cu、ZrMn2One or more of (a).
The working voltage of the aluminum electrolytic capacitor is 10-1000V.
Example 1
The hydrogen storage alloy is a net-shaped LaNi alloy with the thickness of 0.01mm, the length of 60mm and the width of 15mm5. The anode adopts anode foil with withstand voltage value of 10V for low-voltage aluminum electrolytic capacitor, and the cathode adopts specific capacitance of 500 muF/cm2The cathode foil for aluminum electrolytic capacitors of (1) above, wherein the electrolytic paper is a manila hemp having a thickness of 30 μm. The electrolyte uses the electrolyte for the low-voltage aluminum electrolytic capacitor, and comprises the following components in percentage by mass: 15% of ammonium adipate, 69% of ethylene glycol, 10% of water, 2% of ammonium dihydrogen phosphate, 2% of ADP and 2% of diethylene glycol. Riveting the hydrogen storage alloy sheet 4 and the cathode sheet 2 on a cathode pin 6 together, sequentially stacking the electrolytic paper 3, the cathode sheet 2, the hydrogen storage alloy sheet 4, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a roll core, filling electrolyte into the roll core, and manufacturing the electrolytic capacitor with the specification of 10V-220 muF 13mm x 21mm as shown in figure 1.
Comparative example 1
Referring to FIG. 2, the anode was an anode foil for a low-voltage aluminum electrolytic capacitor having a withstand voltage of 10V, and the cathode was an anode foil having a specific capacitance of 500. mu.F/cm2The cathode foil for an aluminum electrolytic capacitor of (1) above, wherein the electrolytic paper is a manila hemp having a thickness of 30 μm. The electrolyte uses the electrolyte for a low-voltage aluminum electrolytic capacitor, and comprises the following components in percentage by mass: 15% of ammonium adipate, 65% of ethylene glycol, 10% of water, 2% of benzoic acid, 2% of ammonium dihydrogen phosphate, 2% of p-nitrobenzoic acid, ADP 2% and 2% of diethylene glycol. And sequentially stacking the electrolytic paper 3, the cathode sheet 2, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a winding core, and filling electrolyte into the winding core to manufacture the electrolytic capacitor with the specification of 10V-220 muF 13mm x 21 mm.
Example 2
The hydrogen storage alloy is characterized as follows: LaNi with a thickness of 0.04mm, a length of 4mm and a width of 10mm and a belt-shaped structure4And Al. The anode adopts an anode foil for a medium-high voltage aluminum electrolytic capacitor with the withstand voltage value of 400V,the cathode has a specific capacitance of 20 muF/cm2The cathode foil for an aluminum electrolytic capacitor of (1) is made of a high-pressure-resistant single-layer wood pulp paper having a thickness of 50 μm. The electrolyte uses the electrolyte for the medium-high voltage aluminum electrolytic capacitor, and comprises the following components in percentage by mass: 15% of ammonium suberate, 7% of ammonium maleate, 3% of maleic acid, 6% of water, 50% of ethylene glycol, 10% of gamma-butyrolactone, 5% of ammonium dihydrogen phosphate, 2% of sorbitol, 0.5% of citric acid, 0.5% of ammonium dichromate and 1% of mannitol. Riveting the hydrogen storage alloy and the cathode sheet on a cathode lead-out wire together, sequentially overlapping the electrolytic paper 3, the cathode sheet 2, the hydrogen storage alloy sheet 4, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a roll core, and filling electrolyte into the roll to manufacture the electrolytic capacitor with the specification of 400V-10 muF 8mm 12mm as shown in figure 1.
Comparative example 2
The anode adopts an anode foil for a medium-high voltage aluminum electrolytic capacitor with the withstand voltage value of 400V, and the cathode adopts a specific capacitance of 20 mu F/cm2The cathode foil for an aluminum electrolytic capacitor of (1) is made of a high-pressure-resistant single-layer wood pulp paper having a thickness of 50 μm. The electrolyte uses the electrolyte for the medium-high voltage aluminum electrolytic capacitor, and comprises the following components in percentage by mass: 15% of ammonium suberate, 7% of ammonium maleate, 3% of maleic acid, 5% of water, 50% of ethylene glycol, 10% of gamma-butyrolactone, 5% of ammonium dihydrogen phosphate, 1% of p-nitrobenzoic acid, 2% of sorbitol, 0.5% of citric acid, 0.5% of ammonium dichromate and 1% of mannitol. And sequentially stacking the electrolytic paper 3, the cathode sheet 2, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a winding core, and filling electrolyte into the winding core to manufacture the electrolytic capacitor with the specification of 400V-10 muF 8mm by 12 mm. The remaining part was made into an electrolytic capacitor in the manner described in fig. 2.
Example 3
The hydrogen storage alloy is characterized as follows: two strips of alloy with the thickness of 0.04mm, the length of 200mm and the width of 100mm and a strip structure are respectively made of TiNi and Mg2And (3) Ni. The anode adopts an anode foil for a medium-high voltage aluminum electrolytic capacitor with the withstand voltage value of 400V, and the cathode adopts a specific capacitance of 40 mu F/cm2The cathode foil for the aluminum electrolytic capacitor, and the electrolytic paper is made of high-pressure-resistant single-layer wood pulpPaper, thickness 30 μm. The electrolyte uses the electrolyte for the medium-high voltage aluminum electrolytic capacitor, and comprises the following components in percentage by mass: suberic acid 2%, ammonium suberate 3%, ammonium maleate 5%, maleic acid 2%, succinic acid 1%, ammonium succinate 1%, water 0.5%, ethylene glycol 76.5%, glycerol 5%, ammonium dihydrogen phosphate 1%, sorbitol 1%, ethyl alcohol 1%, tartaric acid 0.01%, ammonium tartrate 0.01%, and mannitol 0.98%. Riveting the hydrogen storage alloy and the cathode sheet on a cathode lead-out wire together, sequentially overlapping the electrolytic paper 3, the cathode sheet 2, the hydrogen storage alloy sheet 4, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a roll core, filling electrolyte into the roll core, and manufacturing the electrolytic capacitor with the specification of 400V-4700 mu F60 mm x 120mm as shown in figure 1.
Comparative example 3
The anode adopts an anode foil for a medium-high voltage aluminum electrolytic capacitor with the withstand voltage value of 400V, and the cathode adopts a specific capacitance of 40 mu F/cm2The cathode foil for an aluminum electrolytic capacitor of (1) is made of a high-pressure-resistant single-layer wood pulp paper having a thickness of 30 μm. The electrolyte uses the electrolyte for the medium-high voltage aluminum electrolytic capacitor, and comprises the following components in percentage by mass: 1% of suberic acid, 3% of ammonium suberate, 5% of ammonium maleate, 2% of maleic acid, 1% of succinic acid, 1% of ammonium succinate, 0.5% of water, 76.5% of ethylene glycol, 5% of glycerol, 1% of ammonium dihydrogen phosphate, 1% of p-nitrophenol, 1% of sorbitol, 1% of ethyl glucitol, 0.01% of tartaric acid, 0.01% of ammonium tartrate and 0.98% of mannitol. The electrolytic paper 3, the cathode sheet 2, the electrolytic paper 3 and the anode sheet 1 are sequentially stacked from bottom to top, then wound to form a winding core, and the winding core is filled with electrolyte to manufacture the electrolytic capacitor with the specification of 400V-4700 muF 60mm x 120mm as shown in figure 2.
Example 4
The hydrogen storage alloy is characterized as follows: two strips of alloy with the thickness of 0.03mm, the length of 500mm and the width of 200mm and a strip structure are respectively made of CeNi5、CeGdNi5. The anode adopts anode foil for high-voltage aluminum electrolytic capacitor with 700V withstand voltage value, and the cathode adopts specific capacitance of 10 muF/cm2The cathode foil for the aluminum electrolytic capacitor is made of high-pressure-resistant single-layer wood pulp paper and thick electrolytic paperThe degree was 40 μm. The electrolyte uses the electrolyte for the medium-high voltage aluminum electrolytic capacitor, and comprises the following components in percentage by mass: 6% of ammonium suberate, 8% of ammonium maleate, 1% of maleic acid, 1% of ammonium dodecanedioate, 5% of water, 45% of ethylene glycol, 20% of N-N-dimethylformamide, 10% of propylene glycol, 1% of citric acid, 1% of ammonium dichromate, 1% of ammonium dihydrogen phosphate and 1% of ethylene glycol. Riveting the hydrogen storage alloy and the cathode sheet on a cathode lead-out wire together, sequentially overlapping the electrolytic paper 3, the cathode sheet 2, the hydrogen storage alloy sheet 4, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a roll core, filling the electrolyte into the roll core, and manufacturing the electrolytic capacitor with the specification of 700V-4700 mu F90 mm x 220mm as shown in figure 1.
Comparative example 4
The anode adopts anode foil for high-voltage aluminum electrolytic capacitor with 700V withstand voltage value, and the cathode adopts specific capacitance of 10 muF/cm2The cathode foil for an aluminum electrolytic capacitor of (1) is a single-layer wood pulp paper having a thickness of 40 μm and high pressure resistance. The electrolyte uses the electrolyte for the medium-high voltage aluminum electrolytic capacitor, and comprises the following components in percentage by mass: 5% of ammonium suberate, 8% of ammonium maleate, 1% of maleic acid, 1% of ammonium dodecanedioate, 5% of water, 45% of ethylene glycol, 20% of N-N-dimethylformamide, 10% of propylene glycol, 1% of citric acid, 1% of p-nitrobenzyl alcohol, 1% of ammonium dichromate, 1% of ammonium dihydrogen phosphate and 1% of ethylene glycol. And sequentially stacking the electrolytic paper 3, the cathode sheet 2, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a winding core, and filling the winding core with electrolyte to manufacture the electrolytic capacitor with the specification of 700V-4700 mu F90 mm x 220mm as shown in figure 2.
Each of the examples and comparative examples produced electrolytic capacitors having specifications of 10V-220 μ F13 mm x 21mm, 400V-10 μ F8 mm x 12mm, 400V-4700 μ F60 mm x 120mm, 700V-4700 μ F90 mm x 220mm, and 5 samples were produced for each specification.
Putting the electrolytic capacitor into a service life load experiment at 105 ℃ to obtain the service life experiment result of the aluminum electrolytic capacitor, and recording the ratio P/P of the internal pressure of the capacitor to the external air pressure of the capacitor at 1000h, 2000h, 3000h and 4000h respectively0Eliminating abnormal values, calculating the mean value, and obtaining the result as shown in table 14, and (2) is as follows:
TABLE 1 Performance of aluminum electrolytic capacitor with specification of 10V-220 μ F13 mm x 21mm
TABLE 2 Performance of 400V-10 μ F8 mm 12mm aluminum electrolytic capacitor
TABLE 3 Performance of 400V-4700 μ F60 mm 120mm aluminum electrolytic capacitor
TABLE 4 Performance of aluminum electrolytic capacitor with 700V-4700 μ F90 mm x 220mm specification
As can be seen from tables 1 to 4, the electrolytic capacitors produced by using the hydrogen absorbing alloy sheets according to the present invention have a significantly reduced working internal pressure and a greatly increased service life.
Example 5
Preparing an electrolyte: according to the mass percentage, 6 percent of solute, 90 percent of solvent and 4 percent of additive are mixed evenly.
Wherein the solute is adipic acid;
the solvent is ultrapure water;
the additive comprises a waterproof agent, a sparking voltage improver and a performance improver, wherein the mass percent of the waterproof agent in the electrolyte is 1%, the mass percent of the sparking voltage improver is 1%, and the mass percent of the performance improver in the electrolyte is 2%.
The waterproof agent is phosphoric acid;
the flash voltage booster is ethylene oxide;
the performance improver is boron oxide.
The hydrogen storage alloy is a net-shaped LaNi alloy with the thickness of 0.01mm, the length of 30mm and the width of 15mm5-xAxWhere a is Al and x is 1. The anode adopts anode foil with withstand voltage value of 10V for low-voltage aluminum electrolytic capacitor, and the cathode adopts specific capacitance of 500 muF/cm2The cathode foil for aluminum electrolytic capacitors of (1) above, wherein the electrolytic paper is a manila hemp having a thickness of 30 μm.
Riveting the hydrogen storage alloy sheet 4 and the cathode sheet 2 on the cathode pin 6 together, sequentially superposing the electrolytic paper 3, the cathode sheet 2, the hydrogen storage alloy sheet 4, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a winding core, and filling electrolyte into the winding core to manufacture the electrolytic capacitor.
Example 6
Preparing an electrolyte: according to the mass percentage, 20 percent of solute, 70 percent of solvent and 10 percent of additive are mixed evenly.
Wherein the solute is ammonium adipate;
the solvent is propanol;
the additive comprises a waterproof agent, a sparking voltage improver and a performance improver, wherein the mass percent of the waterproof agent in the electrolyte is 0.1%, the mass percent of the sparking voltage improver in the electrolyte is 0.9%, and the mass percent of the performance improver in the electrolyte is 9%.
The waterproof mixture is ammonium dihydrogen phosphate;
the sparking voltage improver is citric acid;
the performance improver is ammonium maleate.
The hydrogen storage alloy is a net-shaped LaNi alloy with the thickness of 0.01mm, the length of 40mm and the width of 15mm5-xAxWhere a is Co, etc., and x is 4. The anode adopts an anode foil for a medium-high voltage aluminum electrolytic capacitor with the withstand voltage value of 400V, and the cathode adopts a specific capacitance of 20 mu F/cm2The cathode foil for the aluminum electrolytic capacitor, the electrolytic paper is made of manila hemp,the thickness was 30 μm.
Riveting the hydrogen storage alloy sheet 4 and the cathode sheet 2 on the cathode pin 6 together, sequentially superposing the electrolytic paper 3, the cathode sheet 2, the hydrogen storage alloy sheet 4, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a winding core, and filling electrolyte into the winding core to manufacture the electrolytic capacitor.
Example 7
Preparing an electrolyte: according to the mass percentage, 10 percent of solute, 82 percent of solvent and 8 percent of additive are evenly mixed.
Wherein the solute is a mixture of formic acid, ammonium formate, maleic acid, benzoic acid, boric acid and ammonium pentaborate;
the solvent is a mixture of ethylene glycol, diethylene glycol, hexanediol, glycerol and mannitol;
the additive comprises a waterproof agent, a sparking voltage improver and a performance improver, wherein the mass percent of the waterproof agent in the electrolyte is 5%, the mass percent of the sparking voltage improver is 0.1%, and the mass percent of the performance improver in the electrolyte is 2.9%.
The waterproof agent is a mixture of hypophosphorous acid and ADP;
the flash voltage booster is a mixture of ammonium dichromate and tartaric acid;
the performance improver is a mixture of sorbitol and ethylene glycol.
The hydrogen storage alloy is MmNi with a net structure with the thickness of 0.01mm, the length of 40mm and the width of 15mm5Mm is lanthanum, the anode is made of anode foil for a low-voltage aluminum electrolytic capacitor with the withstand voltage value of 400V, and the cathode is made of anode foil with the specific capacitance of 20 mu F/cm2The cathode foil for aluminum electrolytic capacitors of (1) above, wherein the electrolytic paper is a manila hemp having a thickness of 30 μm.
Riveting the hydrogen storage alloy sheet 4 and the cathode sheet 2 on the cathode pin 6 together, sequentially superposing the electrolytic paper 3, the cathode sheet 2, the hydrogen storage alloy sheet 4, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a winding core, and filling electrolyte into the winding core to manufacture the electrolytic capacitor.
Example 8
Preparing an electrolyte: according to the mass percentage, 15 percent of solute, 70 percent of solvent and 15 percent of additive are evenly mixed.
Wherein the solute is a mixture of boric acid, ammonium pentaborate, succinic acid and ammonium succinate;
the solvent is a mixture of glycerol and N, N-dimethylformamide;
the additive comprises a waterproof agent, a sparking voltage improver and a performance improver, wherein the mass percent of the waterproof agent in the electrolyte is 9%, the mass percent of the sparking voltage improver is 3%, and the mass percent of the performance improver in the electrolyte is 3%.
The waterproof mixture is ammonium dihydrogen phosphate;
the sparking voltage improver is citric acid;
the performance improver is ammonium maleate.
The hydrogen storage alloy is MmNi with a net structure with the thickness of 0.01mm, the length of 50mm and the width of 15mm5Mm is the mixture of lanthanum, cerium, praseodymium and neodymium, the anode adopts an anode foil for a medium-high voltage aluminum electrolytic capacitor with the withstand voltage value of 400V, and the cathode adopts a specific capacitance of 20 mu F/cm2The cathode foil for aluminum electrolytic capacitors of (1) above, wherein the electrolytic paper is a manila hemp having a thickness of 30 μm.
Riveting the hydrogen storage alloy sheet 4 and the cathode sheet 2 on a cathode pin 6 together, sequentially superposing the electrolytic paper 3, the cathode sheet 2, the hydrogen storage alloy sheet 4, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a winding core, and filling electrolyte into the winding core to manufacture the regular electrolytic capacitor.
Example 9
Preparing an electrolyte: according to the mass percentage, 8 percent of solute, 80 percent of solvent and 12 percent of additive are mixed evenly.
Wherein the solute is a mixture of sebacic acid and suberic acid;
the solvent is a mixture of N, N-dimethylacetamide and gamma-butyrolactone;
the additive comprises a waterproof agent, a sparking voltage improver and a performance improver, wherein the mass percent of the waterproof agent in the electrolyte is 2.1%, the mass percent of the sparking voltage improver is 9%, and the mass percent of the performance improver in the electrolyte is 0.9%.
The waterproof mixture is hypophosphorous acid and ADP;
the sparking voltage improver is tartaric acid;
the performance improver is ethanol.
The hydrogen storage alloy is a net structure of TiNi and Ti with the thickness of 0.01mm, the length of 300mm and the width of 15mm2A mixture of Ni. The anode adopts an anode foil for a medium-high voltage aluminum electrolytic capacitor with the withstand voltage value of 400V, and the cathode adopts a specific capacitance of 40 mu F/cm2The cathode foil for aluminum electrolytic capacitors of (1) above, wherein the electrolytic paper is a manila hemp having a thickness of 30 μm.
Riveting the hydrogen storage alloy sheet 4 and the cathode sheet 2 on the cathode pin 6 together, sequentially superposing the electrolytic paper 3, the cathode sheet 2, the hydrogen storage alloy sheet 4, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a winding core, and filling electrolyte into the winding core to manufacture the electrolytic capacitor.
Example 10
Preparing an electrolyte: according to the mass percentage, the solute 12 percent, the solvent 87.7 percent and the additive 0.3 percent are evenly mixed.
Wherein the solute is a mixture of suberic acid, ammonium suberate, azelaic acid, dodecanedioic acid and ammonium dodecanedioate;
the solvent is gamma-butyrolactone;
the additive comprises 0.1 percent of waterproof agent, 0.1 percent of sparking voltage improver and 0.1 percent of performance improver.
The waterproof mixture is ADP;
the sparking voltage improver is tartaric acid;
the performance improver is sorbitol.
The hydrogen storage alloy is Mg with a net structure with the thickness of 0.01mm, the length of 300mm and the width of 200mm2Ni、Mg2Cu and ZrMn2A mixture of (a). The anode adopts an anode foil for a medium-high voltage aluminum electrolytic capacitor with the withstand voltage value of 400V, and the cathode adopts a specific capacitance of 40 mu F/cm2The cathode foil and electrolytic paper for aluminum electrolytic capacitorIs manila hemp, and has a thickness of 30 μm.
Riveting the hydrogen storage alloy sheet 4 and the cathode sheet 2 on the cathode pin 6 together, sequentially superposing the electrolytic paper 3, the cathode sheet 2, the hydrogen storage alloy sheet 4, the electrolytic paper 3 and the anode sheet 1 from bottom to top, then winding to form a winding core, and filling electrolyte into the winding core to manufacture the electrolytic capacitor.
Claims (10)
1. A method for reducing the working internal pressure of an aluminum electrolytic capacitor by using hydrogen storage alloy is characterized in that electrolytic paper (3), a cathode sheet (2), a hydrogen storage alloy sheet (4), the electrolytic paper (3) and an anode sheet (1) are sequentially overlapped from bottom to top, then a winding core is formed by winding, and the winding core is filled with electrolyte to form the aluminum electrolytic capacitor.
2. The method for reducing the internal pressure of aluminum electrolytic capacitor using hydrogen occluding alloy as recited in claim 1, wherein the hydrogen occluding alloy sheet is a hydrogen occluding alloy material containing no hydrogen.
3. The method of claim 1, wherein the electrolyte comprises 6-20% by mass of solute, 70-90% by mass of solvent, and 0.3-15% by mass of additive.
4. The method of claim 2, wherein the solute is one or more of adipic acid, ammonium adipate, formic acid, ammonium formate, maleic acid, benzoic acid, boric acid, ammonium pentaborate, succinic acid, ammonium succinate, sebacic acid, suberic acid, ammonium suberate, azelaic acid, dodecanedioic acid, and ammonium dodecanedioate.
5. The method for reducing the internal pressure of an aluminum electrolytic capacitor using a hydrogen occluding alloy as recited in claim 2, wherein the solvent is one or more of ultrapure water, propanol, ethylene glycol, diethylene glycol, hexylene glycol, glycerin, mannitol, glycerin, N-dimethylformamide, N-diethylformamide, N-dimethylacetamide and γ -butyrolactone.
6. The method for reducing the working internal pressure of the aluminum electrolytic capacitor by using the hydrogen storage alloy as claimed in claim 2, wherein the additives comprise 0.1 to 9 mass percent of the waterproof agent, 0.1 to 9 mass percent of the sparking voltage improver and 0.1 to 9 mass percent of the performance improver.
7. The method for reducing the internal pressure of an aluminum electrolytic capacitor by using a hydrogen storage alloy as claimed in claim 3, wherein the waterproof agent is one or more of phosphoric acid, ammonium dihydrogen phosphate, hypophosphorous acid and ADP;
the flash voltage booster is one or more of ethylene oxide, citric acid, ammonium dichromate and tartaric acid;
the performance improver is one or more of boron oxide, ammonium maleate, sorbitol and ethylene glycol.
8. The method for reducing the internal pressure of aluminum electrolytic capacitor using hydrogen occluding alloy as recited in claim 1, wherein the thickness of the hydrogen occluding alloy sheet is 0.04mm or less.
9. The method of claim 1, wherein the hydrogen-absorbing alloy sheet has a width equal to that of the cathode sheet and a length of 2% or less.
10. The method of claim 1, wherein the hydrogen storage alloy is LaNi5、LaNi5-xAx，MmNi5、TiNi、Ti2Ni、Mg2Ni、Mg2Cu and ZrMn2One or more of (a); wherein, A is Al,mn, Co or Cu, x ═ 1, 2, 3 or 4, and Mm is one or more of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, and yttrium.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5057972A (en) * | 1990-04-11 | 1991-10-15 | Jelmax Co. Ltd. | Electrolytic capacitor |
| JPH0992584A (en) * | 1995-09-28 | 1997-04-04 | Fujitsu Ltd | Solution leakage preventing structure of electrolytic capacitor |
| JP2004303910A (en) * | 2003-03-31 | 2004-10-28 | Tdk Corp | Capacitor and capacitor electrode |
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| WO2017208723A1 (en) * | 2016-05-30 | 2017-12-07 | 日東電工株式会社 | Electrolytic capacitor |
| CN108538590A (en) * | 2018-04-09 | 2018-09-14 | 苏州松控电子科技有限公司 | A kind of electrolyte for aluminum electrolytic capacitor and preparation method thereof |
| JP2021012988A (en) * | 2019-07-09 | 2021-02-04 | 日本ケミコン株式会社 | Electrolytic capacitor and hydrogen storage alloy for electrolytic capacitor |
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2021
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| US5057972A (en) * | 1990-04-11 | 1991-10-15 | Jelmax Co. Ltd. | Electrolytic capacitor |
| JPH0992584A (en) * | 1995-09-28 | 1997-04-04 | Fujitsu Ltd | Solution leakage preventing structure of electrolytic capacitor |
| JP2004303910A (en) * | 2003-03-31 | 2004-10-28 | Tdk Corp | Capacitor and capacitor electrode |
| WO2017208723A1 (en) * | 2016-05-30 | 2017-12-07 | 日東電工株式会社 | Electrolytic capacitor |
| CN106757169A (en) * | 2016-12-10 | 2017-05-31 | 包头稀土研究院 | A kind of hydrogen bearing alloy rare earth intermediate alloy and preparation method thereof |
| CN108538590A (en) * | 2018-04-09 | 2018-09-14 | 苏州松控电子科技有限公司 | A kind of electrolyte for aluminum electrolytic capacitor and preparation method thereof |
| JP2021012988A (en) * | 2019-07-09 | 2021-02-04 | 日本ケミコン株式会社 | Electrolytic capacitor and hydrogen storage alloy for electrolytic capacitor |
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