JPH06252000A - Electrolytic capacitor driving electrolyte and electrolytic capacitor thereof - Google Patents
Electrolytic capacitor driving electrolyte and electrolytic capacitor thereofInfo
- Publication number
- JPH06252000A JPH06252000A JP5033304A JP3330493A JPH06252000A JP H06252000 A JPH06252000 A JP H06252000A JP 5033304 A JP5033304 A JP 5033304A JP 3330493 A JP3330493 A JP 3330493A JP H06252000 A JPH06252000 A JP H06252000A
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic capacitor
- electrolytic solution
- electrolytic
- added
- capacitor
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 18
- 239000003792 electrolyte Substances 0.000 title abstract description 4
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 25
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002904 solvent Substances 0.000 claims abstract description 5
- 229920001577 copolymer Polymers 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- KWIPUXXIFQQMKN-UHFFFAOYSA-N 2-azaniumyl-3-(4-cyanophenyl)propanoate Chemical compound OC(=O)C(N)CC1=CC=C(C#N)C=C1 KWIPUXXIFQQMKN-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229940090948 ammonium benzoate Drugs 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電解コンデンサ駆動用
電解液（以下、電解液と称する。）およびこれを用いた
電解コンデンサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic solution for driving an electrolytic capacitor (hereinafter referred to as an electrolytic solution) and an electrolytic capacitor using the electrolytic solution.
【０００２】[0002]
【従来の技術】電解コンデンサ駆動用電解液としては、
損失を低減するための低い比抵抗と、高温負荷試験に耐
えるための耐電圧性が要求されるが、通常の有機溶媒と
電解質による電解液では、これらは相反する特性であ
り、両立させるのは困難が伴う。そこで、従来より耐電
圧性を向上させるための添加剤として、水溶性のシリコ
ーンオイル、ポリエチレンオキサイドおよびその各種エ
ステル類、ポリエチレン・プロピレンブロック共重合体
等が提案されている。また、中高電圧用のコンデンサに
おいては、貯蔵期間中あるいは高温無負荷試験中の漏れ
電流増大（漏れ電流劣化）が問題になることがあり、こ
れを抑制するためには、電解液に漏れ電流劣化防止用の
別の添加剤を入れる必要があった。2. Description of the Related Art As an electrolytic solution for driving an electrolytic capacitor,
Low specific resistance to reduce loss and withstand voltage to withstand high-temperature load tests are required, but in ordinary organic solvents and electrolytes with electrolytes, these are contradictory properties and are compatible with each other. There are difficulties. Therefore, conventionally, water-soluble silicone oil, polyethylene oxide and various esters thereof, polyethylene / propylene block copolymers, and the like have been proposed as additives for improving withstand voltage. In addition, in capacitors for medium to high voltage, increase of leakage current (leakage current deterioration) during storage period or high temperature no-load test may become a problem. It was necessary to include another additive for prevention.
【０００３】[0003]
【発明が解決しようとする課題】電解液の耐電圧性を向
上させるための従来の添加剤は、耐電圧性すなわち火花
電圧を上昇させようとすると、添加量を増さなければな
らず、添加量を増すと比抵抗が増大してしまうという問
題点があった。また、漏れ電流劣化を抑制するために、
別の添加剤を添加すると、電解液の組成が複雑となり、
調合に時間を要するばかりか、電解液のコストも上昇し
てしまうという問題点もある。本発明は、以上の問題点
に鑑みてなされたものであり、電解液の比抵抗を増大さ
せずに耐電圧性を向上し、しかも漏れ電流劣化をも抑制
することができる電解液およびこれを用いた電解コンデ
ンサを提供することを目的とする。The conventional additives for improving the withstand voltage property of the electrolytic solution must be added in an increased amount in order to increase the withstand voltage property, that is, the spark voltage. There has been a problem that the resistivity increases as the amount increases. Moreover, in order to suppress the leakage current deterioration,
Adding another additive complicates the composition of the electrolyte,
There is a problem that not only time is required for preparation, but also the cost of the electrolytic solution is increased. The present invention has been made in view of the above problems, and improves the withstand voltage without increasing the specific resistance of the electrolytic solution, and further, it is possible to suppress the leakage current deterioration and the electrolytic solution It is intended to provide an electrolytic capacitor used.
【０００４】[0004]
【課題を解決するための手段】上記問題点を解決するた
め、本発明に係る電解液においては、エチレングリコー
ルを主溶媒とする電解液において、イソブチレン−無水
マレイン酸共重合体（以下、ＩＭＣＰと称する。）を添
加したことを特徴とする。ＩＭＣＰの添加量は、0.1 〜
5wt％が好ましい。一方、本発明に係る電解コンデンサ
は、上記電解液を含浸したコンデンサ素子をケース内に
収納し、弾性封口体、硬質絶縁板等の封口部材により密
封したことを特徴とする。In order to solve the above problems, in the electrolytic solution according to the present invention, an isobutylene-maleic anhydride copolymer (hereinafter referred to as IMCP) is used in an electrolytic solution containing ethylene glycol as a main solvent. ) Is added. The amount of IMCP added is 0.1-
5 wt% is preferred. On the other hand, the electrolytic capacitor according to the present invention is characterized in that the capacitor element impregnated with the electrolytic solution is housed in a case and sealed with a sealing member such as an elastic sealing body or a hard insulating plate.
【０００５】[0005]
【作用】ＩＭＣＰの構造式は化１の通りである。The structural formula of IMCP is shown in Chemical formula 1.
【０００６】[0006]
【化１】 [Chemical 1]
【０００７】ＩＭＣＰを電解液中に添加すると、アルミ
ニウム電極箔上に付着し、皮膜状の錯体を形成するた
め、火花電圧を向上させ、皮膜の劣化による漏れ電流の
増大を抑制するものと考えられる。When IMCP is added to the electrolytic solution, it adheres to the aluminum electrode foil and forms a film-like complex. Therefore, it is considered that the spark voltage is improved and an increase in leakage current due to film deterioration is suppressed. .
【０００８】[0008]
【実施例】以下、実施例に基づいて本発明を説明する。
表１に本発明の実施例および比較例による電解液の組成
と特性を示した。比較例１は、安息香酸アンモニウムを
主溶質として用いた場合であり、実施例１，２および３
はそれにＩＭＣＰを添加した実施例である。ＩＭＣＰを
添加することにより、比抵抗はさほど変化しないが、火
花電圧が上昇することがわかる。火花電圧の上昇は、Ｉ
ＭＣＰの添加量と共に大きくなる。また、比較例２で
は、五ホウ酸アンモニウムを主溶質として用いた場合で
あり、実施例４，５および６は、それにＩＭＣＰを添加
した実施例である。実施例１，２，３と同様に、ＩＭＣ
Ｐを添加することにより、比抵抗をあまり増加させずに
火花電圧を上昇させることができる。次に、電解液を含
浸したコンデンサ素子をケース内に収納し、弾性封口
体、硬質絶縁板等を用いた封口部材により密封すること
により、比較例１および実施例１，２，３の電解液の場
合は、２５０Ｖ，4.7 μF 、比較例２および実施例４，
５，６の電解液の場合は、４００Ｖ，１μF の供試コン
デンサをそれぞれ試作した（図示せず）。試作したコン
デンサについて、定電流印加によるエージング特性およ
び 105℃2000時間の寿命試験を実施した結果を表２に示
す。表２より、ＩＭＣＰを添加した本発明による電解液
を用いたコンデンサは、初期の漏れ電流の低減や無負荷
試験での漏れ電流の劣化防止の他に、エージング時間を
短縮することもできることがわかる。なお、ＩＭＣＰの
添加量については、 0.1wt％未満では効果が小さく、５
wt％を超えると電解液の粘度が上昇してくるので実用的
でない。以上、実施例ではいくつかの好適な例を挙げて
説明したが、エチレングリコールを主溶媒とする電解液
ならば、他の溶媒との混合溶媒でも良いし、溶質も実施
例に示したものに限定されるわけではない。EXAMPLES The present invention will be described below based on examples.
Table 1 shows the compositions and characteristics of the electrolytic solutions according to the examples and comparative examples of the present invention. Comparative Example 1 is a case where ammonium benzoate was used as the main solute, and Examples 1, 2, and 3 were used.
Is an example in which IMCP was added thereto. It can be seen that by adding IMCP, the specific resistance does not change so much, but the spark voltage increases. The increase in spark voltage is I
It increases with the amount of MCP added. Further, Comparative Example 2 is a case where ammonium pentaborate is used as a main solute, and Examples 4, 5 and 6 are Examples in which IMCP is added thereto. IMC as in the first, second, and third embodiments
By adding P, the spark voltage can be increased without increasing the specific resistance so much. Next, the electrolytic solution impregnated with the electrolytic solution was housed in a case and sealed with a sealing member using an elastic sealing body, a hard insulating plate or the like to obtain the electrolytic solution of Comparative Example 1 and Examples 1, 2, and 3. In the case of 250 V, 4.7 μF, Comparative Example 2 and Example 4,
In the case of the electrolytic solutions of 5 and 6, test capacitors of 400 V and 1 μF were manufactured (not shown). Table 2 shows the aging characteristics of a prototype capacitor under constant current application and the results of a life test at 105 ° C for 2000 hours. From Table 2, it can be seen that the capacitor using the electrolytic solution according to the present invention to which IMCP is added can shorten the aging time in addition to reducing the initial leakage current and preventing the deterioration of the leakage current in the no-load test. . Regarding the amount of IMCP added, if the amount is less than 0.1 wt%, the effect is small.
If it exceeds wt%, the viscosity of the electrolytic solution increases, which is not practical. As mentioned above, although some preferred examples have been described in the examples, as long as it is an electrolytic solution containing ethylene glycol as a main solvent, a mixed solvent with another solvent may be used, and the solute may be the one shown in the examples. It is not limited.
【０００９】[0009]
【発明の効果】以上述べたように、本発明によれば、低
比抵抗で耐電圧が高く、しかも漏れ電流の安定した電解
コンデンサを提供することができる。As described above, according to the present invention, it is possible to provide an electrolytic capacitor having a low specific resistance, a high withstand voltage, and a stable leakage current.
【００１０】[0010]
【表１】 [Table 1]
【００１１】[0011]
【表２】 [Table 2]
Claims (3)
液に、イソブチレン−無水マレイン酸共重合体を添加し
たことを特徴とする電解コンデンサ駆動用電解液。1. An electrolytic solution for driving an electrolytic capacitor, wherein an isobutylene-maleic anhydride copolymer is added to an electrolytic solution containing ethylene glycol as a main solvent.
の添加量が0.1 〜５wt％であることを特徴とする請求項
１記載の電解コンデンサ駆動用電解液。2. The electrolytic solution for driving an electrolytic capacitor according to claim 1, wherein the amount of the isobutylene-maleic anhydride copolymer added is 0.1 to 5 wt%.
含浸したコンデンサ素子をケース内に収納し、封口部材
により密封したことを特徴とする電解コンデンサ。3. An electrolytic capacitor, wherein the capacitor element impregnated with the electrolytic solution according to claim 1 or 2 is housed in a case and sealed by a sealing member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03330493A JP3285991B2 (en) | 1993-02-23 | 1993-02-23 | Electrolytic solution for driving electrolytic capacitor and electrolytic capacitor using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03330493A JP3285991B2 (en) | 1993-02-23 | 1993-02-23 | Electrolytic solution for driving electrolytic capacitor and electrolytic capacitor using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06252000A true JPH06252000A (en) | 1994-09-09 |
| JP3285991B2 JP3285991B2 (en) | 2002-05-27 |
Family
ID=12382819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03330493A Expired - Lifetime JP3285991B2 (en) | 1993-02-23 | 1993-02-23 | Electrolytic solution for driving electrolytic capacitor and electrolytic capacitor using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3285991B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63341A (en) * | 1986-06-19 | 1988-01-05 | Idemitsu Petrochem Co Ltd | Copolymer solution |
| JPS6451415A (en) * | 1987-08-24 | 1989-02-27 | Idemitsu Petrochemical Co | Preparation of copolymer |
| JPH02202974A (en) * | 1989-02-02 | 1990-08-13 | Idemitsu Petrochem Co Ltd | Adhesive composition |
| JPH0451510A (en) * | 1990-06-19 | 1992-02-20 | Rubycon Corp | Electrolyte for driving electrolytic capacitor |
-
1993
- 1993-02-23 JP JP03330493A patent/JP3285991B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63341A (en) * | 1986-06-19 | 1988-01-05 | Idemitsu Petrochem Co Ltd | Copolymer solution |
| JPS6451415A (en) * | 1987-08-24 | 1989-02-27 | Idemitsu Petrochemical Co | Preparation of copolymer |
| JPH02202974A (en) * | 1989-02-02 | 1990-08-13 | Idemitsu Petrochem Co Ltd | Adhesive composition |
| JPH0451510A (en) * | 1990-06-19 | 1992-02-20 | Rubycon Corp | Electrolyte for driving electrolytic capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3285991B2 (en) | 2002-05-27 |
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