JPH0810664B2 - Flame retardant electrolytic capacitor - Google Patents
Flame retardant electrolytic capacitorInfo
- Publication number
- JPH0810664B2 JPH0810664B2 JP62148702A JP14870287A JPH0810664B2 JP H0810664 B2 JPH0810664 B2 JP H0810664B2 JP 62148702 A JP62148702 A JP 62148702A JP 14870287 A JP14870287 A JP 14870287A JP H0810664 B2 JPH0810664 B2 JP H0810664B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic capacitor
- flame
- foaming agent
- outer case
- retardant
- 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.)
- Expired - Lifetime
Links
- 239000003990 capacitor Substances 0.000 title claims description 35
- 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 title claims description 18
- 239000003063 flame retardant Substances 0.000 title claims description 18
- 239000004088 foaming agent Substances 0.000 claims description 21
- 238000006297 dehydration reaction Methods 0.000 claims description 11
- 238000010000 carbonizing Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 230000018044 dehydration Effects 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000003566 sealing material Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- XUMBMVFBXHLACL-UHFFFAOYSA-N Melanin Chemical compound O=C1C(=O)C(C2=CNC3=C(C(C(=O)C4=C32)=O)C)=C2C4=CNC2=C1C XUMBMVFBXHLACL-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000004254 Ammonium phosphate Substances 0.000 description 3
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 3
- 235000019289 ammonium phosphates Nutrition 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 235000014633 carbohydrates Nutrition 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000979 retarding effect Effects 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 235000013877 carbamide Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 229940124568 digestive agent Drugs 0.000 description 1
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は難燃化電解コンデンサに係り、例えば防爆
弁動作時に引火等で生ずる電解液の火災を最小限に抑制
する電解コンデンサに関する。Description: TECHNICAL FIELD The present invention relates to a flame-retardant electrolytic capacitor, and more particularly to an electrolytic capacitor that suppresses a fire of an electrolytic solution caused by ignition or the like during operation of an explosion-proof valve to a minimum.
一般に、電解コンデンサに過大な電気ストレスが加え
られると、防爆機能を有する防爆弁等が動作するが、電
解コンデンサ素子は約200℃以上の発熱を伴い、電解液
が発火する場合があった。Generally, when excessive electric stress is applied to an electrolytic capacitor, an explosion-proof valve having an explosion-proof function operates, but the electrolytic capacitor element may generate heat of about 200 ° C. or more, and the electrolytic solution may ignite.
そのため、従来このような弊害を防止する手段とし
て、電解コンデンサの内部あるいは外部に温度ヒューズ
等の通電遮断手段を具備したもの、あるいは電解コンデ
ンサ素子を収納する外装ケースを多重構造とし、この複
数の外装ケースの間隙に消化剤を封入したもの等があっ
た。Therefore, conventionally, as a means for preventing such an adverse effect, one having a current cut-off means such as a temperature fuse inside or outside an electrolytic capacitor or an outer case for accommodating an electrolytic capacitor element has a multiple structure, There were some cases where a digestive agent was enclosed in the gap between the cases.
従来の外装ケースの多重構造によるものは構造が複雑
であり、製造工程の複雑化、部品点数の増加に伴うコス
ト増等を招来していた。The conventional multi-layer structure of the outer case has a complicated structure, resulting in a complicated manufacturing process and an increase in cost due to an increase in the number of parts.
また、電解コンデンサの内部あるいは外部に通電遮断
手段を具備したものは、電解コンデンサの構造が複雑に
なるとともに、電解コンデンサの肥大化を招き、小型の
電解コンデンサでは採用し得ないものであった。更に、
急激な温度上昇に伴う発火事故に対応することができな
い場合もあった。Further, the one provided with a current interruption means inside or outside the electrolytic capacitor complicates the structure of the electrolytic capacitor and causes enlargement of the electrolytic capacitor, which cannot be adopted in a small electrolytic capacitor. Furthermore,
In some cases, it was not possible to deal with a fire accident due to a sudden temperature rise.
この発明は、炭化剤、脱水触媒および発泡剤を基本組
成とする難燃発泡剤を含むシートを、電解コンデンサの
外装ケースの内部に収納したことを特徴としている。The present invention is characterized in that a sheet containing a flame retardant foaming agent having a basic composition of a carbonizing agent, a dehydration catalyst and a foaming agent is housed inside an outer case of an electrolytic capacitor.
また前記難燃発泡剤を含むシートは、電解コンデンサ
素子と外装ケース内底面との間隙、外装ケース内表面、
封口材内表面、電解コンデンサ素子内部またはこれらの
組合せより選択される位置に収納していることを特徴と
している。The sheet containing the flame-retardant foaming agent, the gap between the electrolytic capacitor element and the bottom surface of the outer case, the inner surface of the outer case,
It is characterized in that it is housed at a position selected from the inside surface of the sealing material, the inside of the electrolytic capacitor element, or a combination thereof.
この難燃発泡剤は、一般にOH基を持つ化合物、炭水化
物、多価アルコール、フェノールまたはこれらの組み合
わせより選択される炭化剤と、リン酸アンモニウムから
なる脱水触媒、およびリン酸アンモニウム、尿素、メラ
ニン、グアニジンまたはこれらの組み合わせより選択さ
れる発泡剤等からなる。This flame-retardant foaming agent generally comprises a carbonizing agent selected from a compound having an OH group, a carbohydrate, a polyhydric alcohol, phenol or a combination thereof, a dehydration catalyst consisting of ammonium phosphate, and ammonium phosphate, urea, melanin, It comprises a foaming agent selected from guanidine or a combination thereof.
また、シートは上記の組み合わせの中で、セルロース
等の炭水化物の多孔質シートを基材として、ここに他の
薬剤を付着して形成し、あるいは、ガラス繊維布、セラ
ミックペーパ等の不燃、難燃性を有する多孔質シートに
難燃発泡剤を塗布して形成する。更には、難燃性発泡剤
をバインダーによってスラリー状態としてシート状に加
工し、バインダーを発散させてもよい。In addition, among the above combinations, the sheet is formed by using a porous sheet of carbohydrates such as cellulose as a base material and adhering other chemicals to it, or incombustible and flame-retardant materials such as glass fiber cloth and ceramic paper. It is formed by applying a flame-retardant foaming agent to a porous sheet having properties. Further, the flame-retardant foaming agent may be processed into a sheet with a binder to form a sheet, and the binder may be diffused.
難燃発泡剤は、発火等による熱を受けると、その基本
組成である炭化剤が脱水反応して炭素のみの層となり、
脱水触媒は前記炭化剤が発熱により分解して可燃性ガス
を放出する前に炭化剤と反応してエステル化して脱水反
応、すなわち脱水分解吸熱反応を生じさせる。更に、発
泡剤は、熱分解によりN2を出し、脱水分解吸熱反応によ
って生じたH2O（ｇ）とともに発泡層のガスになるとと
もに酸素を希釈する。When the flame-retardant foaming agent receives heat due to ignition, etc., the basic composition of the carbonizing agent undergoes a dehydration reaction to form a layer of carbon only,
The dehydration catalyst reacts with the carbonizing agent to esterify before the carbonizing agent decomposes due to heat generation and releases a combustible gas to cause a dehydration reaction, that is, a dehydration decomposition endothermic reaction. Further, the foaming agent releases N 2 by thermal decomposition, becomes a gas of the foamed layer together with H 2 O (g) generated by the dehydration decomposition endothermic reaction, and dilutes oxygen.
すなわち、難燃発泡剤は、発火による温度上昇に伴
い、断熱発泡炭化層を形成し、熱および酸素を遮断し、
また脱水分解吸熱反応によって温度を下げ、更に、不燃
性ガスを発生させて発泡剤源とし、酸素を希釈する機能
を有している。そして、難燃発泡剤が発熱に反応した場
合、発泡剤の厚さはもとの数百倍となる。また、炭化剤
が酸素の供給を遮断するので、難燃効果、遅炎効果があ
り、電解コンデンサの延焼を防止することができる。That is, the flame-retardant foaming agent forms an adiabatic foamed carbonized layer as the temperature rises due to ignition, shuts off heat and oxygen,
Further, it has a function of lowering the temperature by a dehydration decomposition endothermic reaction and further generating an incombustible gas to serve as a foaming agent source to dilute oxygen. When the flame-retardant foaming agent reacts to heat generation, the thickness of the foaming agent becomes several hundred times the original thickness. Further, since the carbonizing agent cuts off the supply of oxygen, it has a flame retarding effect and a flame retarding effect, and can prevent the spread of the electrolytic capacitor.
以下この発明を実施例により説明する。図に示したよ
うに、電解コンデンサ１は、両極電極箔８を電解紙９と
ともに巻回して形成した電解コンデンサ素子２を外装ケ
ース４に収納し、電解コンデンサ素子２から導出された
電極引出し用のリード線５を、封口体３に挿通している
外部接続端子10とを接続するとともに該封口体３を外装
ケース４の開口部に装着している。The present invention will be described below with reference to examples. As shown in the figure, in the electrolytic capacitor 1, the electrolytic capacitor element 2 formed by winding the bipolar electrode foil 8 together with the electrolytic paper 9 is housed in the outer case 4, and the electrolytic capacitor element 2 is drawn out from the electrolytic capacitor element 2. The lead wire 5 is connected to the external connection terminal 10 which is inserted into the sealing body 3, and the sealing body 3 is attached to the opening of the outer case 4.
実施例１ セルロース（炭化剤）からなる円板状のシート６に、
フェノール（炭化剤）、リン酸アンモニウム（脱水触
媒）およびメラニン（発泡剤）を付着させたものを、第
１図で示すように、定格電圧200V、定格静電容量470μ
Ｆの電解コンデンサ１の外装ケース４の内底面と電解コ
ンデンサ素子２の端面との間隙に収納した。Example 1 A disk-shaped sheet 6 made of cellulose (carbonizing agent)
As shown in Fig. 1, the one with phenol (carbonizing agent), ammonium phosphate (dehydration catalyst) and melanin (foaming agent) attached has a rated voltage of 200V and a rated capacitance of 470μ.
The electrolytic capacitor 1 of F was housed in the gap between the inner bottom surface of the outer case 4 and the end surface of the electrolytic capacitor element 2.
実施例２ 実施例１と同じ組成からなるシート７を、第２図に示
すように、帯状に形成し、電解コンデンサ２とともに巻
回した。Example 2 A sheet 7 having the same composition as in Example 1 was formed into a strip shape as shown in FIG. 2 and was wound together with the electrolytic capacitor 2.
実施例３ 前記実施例１〜２と同一定格で、前記シートを収納し
ない電解コンデンサを従来例として準備し、実施例１〜
２および従来例による試料を各10個用意して各試料に30
0Vの過電圧を印加し、電圧印加後の発火の有無、発火後
の消化時間を測定した。その結果を次に示す。Example 3 An electrolytic capacitor having the same rating as that of Examples 1 and 2 and not accommodating the sheet is prepared as a conventional example.
2 and 10 samples according to the conventional example are prepared and 30 samples are prepared for each sample.
An overvoltage of 0 V was applied, and the presence or absence of ignition after the application of voltage and the digestion time after ignition were measured. The results are shown below.
〔発明の効果〕 以上のようにこの発明は、炭化剤、脱水触媒および発
泡剤を基本組成とする難燃発泡剤を含むシートを、電解
コンデンサの外装ケースの内部に収納したことを特徴と
している。 [Effects of the Invention] As described above, the present invention is characterized in that a sheet containing a flame-retardant foaming agent having a basic composition of a carbonizing agent, a dehydration catalyst and a foaming agent is housed inside an outer case of an electrolytic capacitor. .
また、前記難燃発泡剤を含むシートは、電解コンデン
サ素子と外装ケース内底面との間隙、外装ケース内表
面、封口材内表面、電解コンデンサ素子内部またはこれ
らの組合せより選択される位置に収納していることを特
徴としているので、電解コンデンサに過大な電気ストレ
スが加えられ電解コンデンサ素子が発熱した場合、難燃
発泡剤が断熱発泡炭化層を形成し、熱および酸素を遮断
し、また脱水分解吸熱反応によって温度を下げるととも
に不燃性ガスを発生させて酸素を希釈するので、電解液
の発火を防止し、あるいは発火してもただちに自己消化
機能を果たし、電子機器内の他の電子部品に延焼するこ
とがなくなる。The sheet containing the flame-retardant foaming agent is housed in a position selected from a gap between the electrolytic capacitor element and the inner bottom surface of the outer case, the inner surface of the outer case, the inner surface of the sealing material, the inside of the electrolytic capacitor element, or a combination thereof. When the electrolytic capacitor element generates heat due to excessive electrical stress applied to the electrolytic capacitor, the flame-retardant foaming agent forms a heat-insulating foamed carbonized layer that blocks heat and oxygen, and also dehydrates and decomposes. The endothermic reaction lowers the temperature and generates an incombustible gas to dilute oxygen, preventing the electrolyte from igniting, or performing an auto-extinguishing function immediately after ignition, and spreading to other electronic components in the electronic device. There is nothing to do.
第１図は、この発明の第１の実施例を示した断面図、第
２図は第２の実施例を示した断面図である。 １……電解コンデンサ、２……電解コンデンサ素子、３
……封口体、４……外装ケース、５……リード線、6,7
……シート、８……電極箔、９……電解紙、10……外部
接続端子。FIG. 1 is a sectional view showing a first embodiment of the present invention, and FIG. 2 is a sectional view showing a second embodiment. 1 ... Electrolytic capacitor, 2 ... Electrolytic capacitor element, 3
...... Sealing body, 4 ... Exterior case, 5 ... Lead wire, 6,7
...... Sheet, 8 ... Electrode foil, 9 ... Electrolytic paper, 10 ... External connection terminal.
Claims (2)
とする難燃発泡剤を含むシートを、電解コンデンサ素子
とともに外装ケース内部に収納したことを特徴とする難
燃化電解コンデンサ。1. A flame-retardant electrolytic capacitor, characterized in that a sheet containing a flame-retardant foaming agent having a basic composition of a carbonizing agent, a dehydration catalyst and a foaming agent is housed inside an outer case together with an electrolytic capacitor element.
デンサ素子と外装ケース内底面との間隙、外装ケース内
表面、封口材内表面、電解コンデンサ素子内部またはこ
れらの組合せより選択される位置に収納していることを
特徴とする特許請求の範囲第１項記載の難燃化電解コン
デンサ。2. The sheet containing the flame-retardant foaming agent is located at a position selected from a gap between the electrolytic capacitor element and the inner bottom surface of the outer case, an inner surface of the outer case, an inner surface of the sealing material, the inner surface of the electrolytic capacitor element, or a combination thereof. The flame-retardant electrolytic capacitor according to claim 1, which is housed in
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62148702A JPH0810664B2 (en) | 1987-06-15 | 1987-06-15 | Flame retardant electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62148702A JPH0810664B2 (en) | 1987-06-15 | 1987-06-15 | Flame retardant electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63312620A JPS63312620A (en) | 1988-12-21 |
| JPH0810664B2 true JPH0810664B2 (en) | 1996-01-31 |
Family
ID=15458686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62148702A Expired - Lifetime JPH0810664B2 (en) | 1987-06-15 | 1987-06-15 | Flame retardant electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0810664B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58197712A (en) * | 1982-05-13 | 1983-11-17 | マルコン電子株式会社 | Electrolyte for driving electrolytic condenser |
| JPS60242610A (en) * | 1985-04-23 | 1985-12-02 | マルコン電子株式会社 | Electrolyte for electrolytic condenser |
-
1987
- 1987-06-15 JP JP62148702A patent/JPH0810664B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63312620A (en) | 1988-12-21 |
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