JPS6210979Y2 - - Google Patents
Info
- Publication number
- JPS6210979Y2 JPS6210979Y2 JP1978147839U JP14783978U JPS6210979Y2 JP S6210979 Y2 JPS6210979 Y2 JP S6210979Y2 JP 1978147839 U JP1978147839 U JP 1978147839U JP 14783978 U JP14783978 U JP 14783978U JP S6210979 Y2 JPS6210979 Y2 JP S6210979Y2
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- container
- top lid
- concave
- upper lid
- 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
Links
- 239000003990 capacitor Substances 0.000 claims description 34
- 229920005992 thermoplastic resin Polymers 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000003989 dielectric material Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【考案の詳細な説明】
本考案は上蓋に保安機能を備えたコンデンサの
改良に関するもので、誘電体破壊によつて生じる
コンデンサの爆発などの事故とそれに伴つて派生
する二次災害を防止するためのものである。[Detailed description of the invention] This invention relates to the improvement of a capacitor with a safety function on the top cover, and is intended to prevent accidents such as capacitor explosions caused by dielectric breakdown and secondary disasters that may result from such accidents. belongs to.
一般に紙または有機プラスチツクフイルムなど
の材料を誘電体とし、完全密閉構造の容器に収容
したコンデンサが用いられ、このコンデンサに通
電中誘電体内部で何らかの原因により絶縁損傷が
起ると、引続き供給される電気エネルギーによつ
て誘電体が絶縁破壊に至る。このとき誘電体材料
の急激な熱化学分解によつて多量の可燃性ガスが
発生し、その圧力によつて遂にはコンデンサ外装
密閉容器の破裂、あるいは可燃性ガスに引火、爆
発、炎上するなど、当該コンデンサのみの被害に
とどまらず、周辺部の機器に波及災害をもたらす
など最悪事態を招くことになる。このような誘電
体材料のもつ本質的な材料欠陥の除去が現状の誘
電体材料技術では極めて困難であることから、今
日までコンデンサ製造の各社は、きそつて容器の
破裂あるいは可燃性ガスに引火、爆発、炎上によ
る保安をはかるべく開発に努力し、現在その代表
例として熱作動型、圧力作動型、電流作動型など
の各種の保安機能を備えたコンデンサが実用化さ
れている。その実際上の実用に対する主体である
圧力作動型について第１図および第２図に基づき
詳細に説明すると、第１図および第２図は上面一
方開口型金属製密閉容器の上蓋端子部に保安機能
を有するコンデンサの断面図で、第１図は保安機
構の作動前の正常状態のコンデンサ、第２図は保
安機構の作動後のコンデンサの状況を示し、誘電
体が破壊してコンデンサ素子６より発生するガス
が密閉金属容器８内に充満し、その圧力によつて
上蓋７が膨張変形し、上部に押し上げられる。こ
のとき支持板５で支持されたリード線４と上蓋７
に絶縁碍子２を介して固定された端子１との接合
部３が切断されて電気回路が遮断されるもので、
コンデンサの外装容器８および上蓋７を金属材料
にして、金属の強じんかつ膨張変形性を利用した
典型的な構造例であるが、容器８、上蓋７が金属
であるためコンデンサの重量が重くなる、また価
格が高いなどの欠点があつた。 Generally, a capacitor is used that has a dielectric material such as paper or organic plastic film and is housed in a completely sealed container.If insulation damage occurs for some reason inside the dielectric while current is being applied to this capacitor, the capacitor will continue to be supplied. Electrical energy causes dielectric breakdown in the dielectric. At this time, a large amount of flammable gas is generated due to the rapid thermochemical decomposition of the dielectric material, and the resulting pressure may eventually cause the capacitor's external sealed container to rupture, or the flammable gas to ignite, explode, or burst into flames. This will not only cause damage to the capacitor, but also cause a ripple effect on surrounding equipment, resulting in the worst possible situation. Since it is extremely difficult to remove these inherent material defects in dielectric materials using current dielectric material technology, capacitor manufacturers have to this day attempted to prevent the container from rupturing or causing flammable gas to ignite. Efforts have been made to develop capacitors with various safety features such as heat-activated, pressure-activated, and current-activated types, which are currently in practical use. The pressure-operated type, which is the main body for practical use, will be explained in detail based on Figs. 1 and 2. Figs. Figure 1 shows the capacitor in a normal state before the safety mechanism is activated, and Figure 2 shows the capacitor after the safety mechanism is activated. Gas fills the sealed metal container 8, and the pressure causes the top lid 7 to expand and deform, pushing it upward. At this time, the lead wire 4 and the upper lid 7 supported by the support plate 5
The joint 3 with the terminal 1 fixed via the insulator 2 is cut, and the electric circuit is interrupted.
This is a typical example of a structure in which the outer container 8 and the upper lid 7 of the capacitor are made of metal, taking advantage of the strength and expansion deformability of metal, but since the container 8 and the upper lid 7 are made of metal, the weight of the capacitor becomes heavy. However, it also had drawbacks such as high price.
本考案は低価格で軽重量しかも保安機能の安定
作動のはかれるコンデンサを提供するもので、密
閉容器の上蓋を熱可塑性樹脂にして保安機能を備
え、その作動原理は前述の圧力作動型で上蓋を改
良して膨張変形させるところにその特徴を有して
いる。 The present invention provides a capacitor that is low in price, light in weight, and has a stable operation of safety functions.The top lid of the sealed container is made of thermoplastic resin to provide a safety function, and its operating principle is the pressure-operated type described above. Its unique feature is that it can be expanded and deformed through modification.
すなわち、一般の樹脂はその性質が金属と大き
く異なり、金属の強じん性、曲げ性に富まず、ま
たもろいために第１図のコンデンサ構造の条件を
そのまま樹脂容器に変更しても内圧上昇による上
蓋の膨張変形が期待できず、膨張変形する前に材
料が破壊し、保安機能作動を有しない。したがつ
て樹脂製容器の上蓋を膨張変形させるために板状
上蓋の中央部を凹状にし、かつその凹部側面をテ
ーパ状に形成し、該凹部の少なくとも底面を薄肉
にし、内圧上昇による上蓋の膨張変形を容易にし
たもので、以下本考案の実施例による図面に基づ
き詳細に説明する。 In other words, the properties of ordinary resins are significantly different from those of metals; they do not have the toughness and bendability of metals, and they are also brittle. Expansion and deformation of the top cover cannot be expected, and the material breaks before expansion and deformation, so there is no safety function. Therefore, in order to expand and deform the top lid of a resin container, the central part of the plate-shaped top lid is made concave, and the side surfaces of the concave part are formed into a tapered shape, and at least the bottom surface of the concave part is made thin to prevent the top lid from expanding due to the increase in internal pressure. The present invention is easily modified and will be described in detail below with reference to the drawings according to embodiments of the present invention.
第５図は樹脂材料で形成した本考案の容器上蓋
の要部拡大断面図で、１１は端子、１２はパツキ
ン、１３は上蓋、１４は凹部の底面で薄肉になつ
ている。上蓋１３の中央部に凹部を設け、その底
面部に引出端子１１の取付部１６を設け、凹部側
面１５をテーパ状にし、容器内圧上昇により引出
端子１１部が凸状になりやすいように設計構成し
たもので、凹部側面１５のテーパ角度および薄肉
にした底面１４の厚さにより内圧作動が異なる。
特に薄肉の厚みは上蓋の最長径が50mm以下の場合
1.5mm以下で、50mmを越え100mm以内では２mm以
下、また100mmを越える径では３mm以下が最適で
ある。なお図中１７はコンデンサ素子の引出リー
ドと接続したリード線１８の支持板で、上蓋１３
の凹部が変形して凸状になるとき端子１１とリー
ド線１８との切断支持のためのものであり、また
２４は上蓋の凹部が内圧上昇により押し上げられ
凸状に***しやすいように設けた溝で、凹部側面
１５のテーパ角度および溝２４の深さ、幅の広さ
位置により保安機能作動が異なる。したがつて溝
２４の位置はテーパ部あるいはその周辺部に設け
てその作動圧力値の調整をすることができ、溝２
４は上蓋１３の外面であつても内面にあつてもよ
く、またテーパ部の肉厚を薄くしてもよい。また
凹部の形状は円形、惰円などのようにエツジの鋭
角でない形状が最適である。さらに樹脂材料は使
用条件、また加工条件、内圧作動条件により選定
されるもので、現在熱可塑性樹脂が最も適してい
る。 FIG. 5 is an enlarged sectional view of the main parts of the container top lid of the present invention made of a resin material, in which 11 is a terminal, 12 is a packing, 13 is a top lid, and 14 is a thin bottom surface of a recess. A recess is provided in the center of the upper lid 13, a mounting part 16 for the pull-out terminal 11 is provided in the bottom surface thereof, and the side surfaces 15 of the recess are tapered so that the pull-out terminal 11 tends to become convex as the internal pressure of the container increases. The internal pressure operation differs depending on the taper angle of the side surface 15 of the recess and the thickness of the thinned bottom surface 14.
Particularly thin wall thickness is when the longest diameter of the top cover is 50mm or less.
The optimal diameter is 1.5 mm or less, 2 mm or less for diameters exceeding 50 mm and within 100 mm, and 3 mm or less for diameters exceeding 100 mm. In addition, 17 in the figure is a support plate for the lead wire 18 connected to the lead-out lead of the capacitor element.
24 is provided to support the cutting of the terminal 11 and the lead wire 18 when the recessed part deforms and becomes convex, and 24 is provided so that the recessed part of the upper cover is likely to be pushed up and protruded into a convex shape due to an increase in internal pressure. The operation of the safety function differs depending on the taper angle of the side surface 15 of the groove, the depth and width of the groove 24, and the position of the groove. Therefore, the position of the groove 24 can be provided in the tapered part or its surrounding area to adjust the operating pressure value.
4 may be located on the outer surface or inner surface of the upper lid 13, and the thickness of the tapered portion may be made thinner. Further, the optimum shape of the recess is a shape with no acute angles, such as a circle or an inertia circle. Furthermore, the resin material is selected depending on the usage conditions, processing conditions, and internal pressure operating conditions, and thermoplastic resins are currently the most suitable.
以上のように構成された本考案の保安機能を備
えた上蓋１３を用いたコンデンサを第３図に、ま
たその保安機構の作動後のコンデンサを第４図
に、さらに第６図に第４図の保安機構の作動後の
要部拡大断面図を示し、詳細に説明すると、プラ
スチツク容器１９内にコンデンサ素子２０を収納
し、引出リード線１８を支持板１７に配置し、中
央部に凹部を有し、その側面１５がテーパ状で、
該凹部底面１４の厚さを0.8mmと薄肉に形成した
上蓋１３を配置し、上蓋１３にパツキン１２を介
して端子１１を取り付け、端子１１とリード線１
８を接続し、容器１９と上蓋１３を接着密閉した
コンデンサで、２１はリード線１８とコンデンサ
素子２０の電極または電極引出片との接続部、２
２は端子１１とリード線１８の接合部、２３は容
器１９と上蓋１３の接着部を示す。 A capacitor using the top cover 13 with the safety function of the present invention constructed as described above is shown in FIG. 3, and the capacitor after the safety mechanism is activated is shown in FIG. 4, and FIG. An enlarged sectional view of the main parts after the safety mechanism is activated is shown, and explained in detail.The capacitor element 20 is housed in the plastic container 19, the lead wire 18 is placed on the support plate 17, and there is a recessed part in the center. and its side surface 15 is tapered,
A top cover 13 with a thin bottom surface 14 of 0.8 mm is placed, a terminal 11 is attached to the top cover 13 via a packing 12, and the terminal 11 and lead wire 1 are connected to each other.
8 is connected, and the container 19 and the upper lid 13 are adhesively sealed. 21 is the connection part between the lead wire 18 and the electrode or electrode pull-out piece of the capacitor element 20;
Reference numeral 2 indicates a joint between the terminal 11 and the lead wire 18, and reference numeral 23 indicates a bond between the container 19 and the upper lid 13.
上記のコンデンサにおいて、コンデンサ素子２
０の誘電体が破壊して密閉容器内にガス発生を伴
うと上蓋１３が膨張変形し、第４図のように上蓋
１３の凹部が上部に押し上げられる。このとき支
持板１７で支持されたリード線１８と上蓋１３に
固定された端子１１との接合部２２が切断されて
電気回路を遮断してコンデンサの保安をはかるも
ので、上蓋１３に形成した凹部の上部への押し上
げは、密閉容器内の圧力上昇により作動し、ある
圧力までは凹部側面１５のテーパの張り合い効果
によつてほとんど変形することはない。しかし、
それ以上に圧力が上昇すると底面１４の薄肉部が
歪を生じ、彎曲変形して上蓋の凹部が上方に押し
上げられ凸状に***する。 In the above capacitor, capacitor element 2
When the dielectric of 0 is broken and gas is generated in the sealed container, the upper lid 13 expands and deforms, and the concave portion of the upper lid 13 is pushed upward as shown in FIG. At this time, the joint 22 between the lead wire 18 supported by the support plate 17 and the terminal 11 fixed to the top cover 13 is cut, thereby interrupting the electric circuit and ensuring the safety of the capacitor. The push-up of the concave portion 15 to the top is activated by the increase in pressure within the closed container, and until a certain pressure is reached, the concave side surface 15 is hardly deformed due to the tension effect of the taper. but,
If the pressure increases further, the thin wall portion of the bottom surface 14 will be distorted and deformed into a curved shape, and the recessed portion of the top cover will be pushed upward and protrude into a convex shape.
このコンデンサ内部圧力と上蓋中央部の凹部の
変形量（上蓋中央部のふくれ量）の関係特性の一
例を第７図に示し、○イは本考案で容器材質はポリ
プロピレン樹脂、○ロは従来のアルミニウム容器を
用いたもので、Ａ部は保安機構の作動領域、Ｂ部
は容器破壊領域である。 An example of the relationship between the internal pressure of the capacitor and the amount of deformation of the recess in the center of the top lid (the amount of bulge in the center of the top lid) is shown in Figure 7. An aluminum container is used, and part A is the activation area of the safety mechanism, and part B is the container destruction area.
以上にように本考案は上蓋中央部が凹部とな
り、その側面がテーパ状でかつ該凹部底面１４が
薄肉に形成されているので、ある一定の内圧以上
になると作動が確実、また従来の金属容器および
上蓋により製作されたコンデンサに比較して重量
を軽くし、価格の安い樹脂材料を用い、上蓋の中
央部を凹状にして側部をテーパ状にし、該凹部の
少なくとも底面を薄肉形成することにより保安機
能を備えたもので安価、軽量かつ簡単に形成する
ことができ、工業上有益なものである。 As described above, the present invention has a concave portion in the center of the upper lid, tapered side surfaces, and a thin bottom surface 14 of the concave portion. By making the weight lighter compared to capacitors manufactured with upper lids, by using a cheaper resin material, by making the upper lid concave in the center and tapered at the sides, and by forming at least the bottom of the recess into a thin wall. It has a safety function, is inexpensive, lightweight, and can be easily formed, and is industrially useful.
第１図および第２図は従来の金属製密閉容器の
上蓋端子部に保安機能を有するコンデンサの断面
図で、第１図は保安機構の作動前の正常状態図、
第２図は保安機構の作動後の状況図、第３図は本
考案のコンデンサの断面図、第４図は第３図のコ
ンデンサの保安機構の作動後の断面図、第５図は
第３図のコンデンサの上蓋部の要部拡大面図、第
６図は第４図の保安機構の作動後の上蓋部の要部
拡大断面図、第７図は本考案の一実施例のコンデ
ンサの内部圧力と上蓋中央部の凹部変形量の特性
図を示す。
１１：端子、１２：パツキン、１３：上蓋、１
４：凹部底面、１５：凹部側面、１６：端子の取
付部、１７：支持板、１８：リード線、１９：容
器、２０：コンデンサ素子、２１：接続部、２
２：接合部、２３：接着部、２４：溝。
Figures 1 and 2 are cross-sectional views of a conventional capacitor that has a safety function in the upper lid terminal of a sealed metal container. Figure 1 is a normal state diagram before the safety mechanism is activated;
Fig. 2 is a diagram of the state after the safety mechanism is activated, Fig. 3 is a sectional view of the capacitor of the present invention, Fig. 4 is a sectional view of the capacitor shown in Fig. 3 after its safety mechanism is activated, and Fig. 5 is a sectional view of the capacitor of the present invention. Figure 6 is an enlarged cross-sectional view of the main parts of the upper lid of the capacitor after the safety mechanism shown in Figure 4 is activated, and Figure 7 is the interior of the capacitor according to an embodiment of the present invention. A characteristic diagram of pressure and the amount of deformation of the recess in the center of the upper lid is shown. 11: Terminal, 12: Packet, 13: Top cover, 1
4: Bottom surface of recess, 15: Side surface of recess, 16: Terminal attachment section, 17: Support plate, 18: Lead wire, 19: Container, 20: Capacitor element, 21: Connection section, 2
2: Joint portion, 23: Adhesive portion, 24: Groove.
Claims (1)
形し、該上蓋に取付けられた端子とコンデンサ素
子とを接続する接続導体が切断する保安機能を有
するコンデンサにおいて、該容器の上蓋は熱可塑
性樹脂を用いた板状で、その中央部を凹状にし
て、かつ凹部の側面をテーパー状に形成し、該凹
部の少なくとも底面を薄肉に一体形成してしかも
該テーパー状側面もしくはその周辺部に一つ以上
の環状溝を設けたコンデンサ。 In a capacitor that has a safety function in which the top lid of the container is deformed due to internal pressure expansion of the sealed container and the connecting conductor connecting the terminal attached to the top lid and the capacitor element is severed, the top lid of the container is made of thermoplastic resin. The central part is concave, and the side surfaces of the concave part are formed into a tapered shape, and at least the bottom surface of the concave part is integrally formed with a thin wall, and one or more A capacitor with an annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978147839U JPS6210979Y2 (en) | 1978-10-26 | 1978-10-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978147839U JPS6210979Y2 (en) | 1978-10-26 | 1978-10-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5565844U JPS5565844U (en) | 1980-05-07 |
| JPS6210979Y2 true JPS6210979Y2 (en) | 1987-03-16 |
Family
ID=29129678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978147839U Expired JPS6210979Y2 (en) | 1978-10-26 | 1978-10-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6210979Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518102U (en) * | 1974-07-04 | 1976-01-21 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4725737U (en) * | 1971-04-14 | 1972-11-22 |
-
1978
- 1978-10-26 JP JP1978147839U patent/JPS6210979Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518102U (en) * | 1974-07-04 | 1976-01-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5565844U (en) | 1980-05-07 |
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