CN101013631B - Method for preventing deformation of capacitor core and aluminum electrolytic capacitor - Google Patents
Method for preventing deformation of capacitor core and aluminum electrolytic capacitor Download PDFInfo
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- CN101013631B CN101013631B CN2006100635217A CN200610063521A CN101013631B CN 101013631 B CN101013631 B CN 101013631B CN 2006100635217 A CN2006100635217 A CN 2006100635217A CN 200610063521 A CN200610063521 A CN 200610063521A CN 101013631 B CN101013631 B CN 101013631B
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Abstract
The invention relates to one method and one electrolyte capacitor to avoid capacitor chip deformation, which is characterized by the following: setting one load pad slice on capacitor chip and the pressure valve on capacitor shell bottom; the chip is put onto pad slice to go out of leakage holes under gas pressure to avoid capacitor chips crushing deformation; the said chip down circle and shell inner wall set one ring block edge connected to the load pad to avoid capacitor chip radium deformation.
Description
[technical field]
The present invention relates to a kind of method and structure that prevents the aluminium electrolytic capacitor deformation of capacitor core, especially a kind of aluminium electrolytic capacitor that is applicable to that the method for designing that prevents this condenser capacitance fuse distortion on the aluminium electrolytic capacitor reaches by this method design improves structure, is mainly used in big capacity ultra-high voltage aluminum electrolytic capacitor.
[background technology]
In development areas of information technology with rapid changepl. never-ending changes and improvements, capacitor is one of key element all the time, capacitor is the output maximum in three basic passive components [L (inductance) C (electric capacity) R (resistance)], is the indispensable charging and discharging of any electronic circuit, the logical friendship every straight element.People also more and more pay close attention to capacitor fail safe in use when paying close attention to the capacitor combination property in recent years.The aluminium electrolytic capacitor that is used for electronic equipment, the excessive situation of internal pressure value appears in regular meeting in the time of in the use.For example work as electronic equipment and break down, perhaps under the situation of misoperation, tend to an overrating voltage or a reverse voltage are added on the electrochemical capacitor.In case on electrochemical capacitor, add a voltage that exceeds normal value,, impel the capacitor internal pressure to rise owing to reasons such as the generation of pellumina and extraordinary heatings.In addition, even under normal circumstances use electrochemical capacitor, if on electric capacity, apply certain voltage for a long time, because the self-repair function of anodic alumina films also can produce gas, and the electrochemical capacitor internal pressure is risen gradually.For fear of the excessive harm that brings of electric capacity internal pressure, the particularly big capacity ultra-high voltage aluminum of aluminium electrolytic capacitor electrolytic capacitor is set up and is counted a kind of like this structure, in case internal pressure surpasses certain certain value, the pressure valve action, thus prevent danger such as condenser breakdown.But because big capacity ultra-high voltage aluminum electrolytic capacitor overall dimension super large; corresponding fuse size is super large also; when internal pressure is excessive cause pressure valve action after; local crimp takes place in gas percussion regular meeting of following time in fuse; cause anode foils and Cathode Foil to be short-circuited, even may cause pyrophoricity accident.
Patent Office of the People's Republic of China discloses a kind of aluminium electrolytic capacitor (application number: 98115514.6), it is the can that coats a sealing outside capacitor core, this can adopts the alloy of more than one dissimilar metals that are different from aluminium to constitute, to improve the intensity of whole capacitor fuse, thereby the opposing fuse is in the local crimp of gas percussion generation of following time, but this mode is to can material requirements height, the invisible production cost that increased, and use value is low.And the disclosed another kind of noinductive capacitor of Patent Office of the People's Republic of China (application number: 02148451.1), be to adopt guiding gutter to be set at its side wall of outer shell, make gas go out discharging by the gap between capacitor core and the shell along above-mentioned refluence concentrated flow, because refluence groove gap is little, this structure is for big capacity ultra-high voltage aluminum electrolytic capacitor, gaseous emission is very not smooth, use not too reliable, the distortion that can bring capacitor core equally.
[summary of the invention]
Technical problem to be solved by this invention is to overcome when the electric capacity internal pressure is excessive in the present prior art causes the pressure valve unlatching, the defective of local crimp easily takes place in fuse under gas percussion, provide a kind of method that can effectively prevent deformation of capacitor core when pressure valve is opened and with the capacitor core of the design of this method.
Technical scheme proposed by the invention is:
A kind of method that prevents the capacitor body distortion, it is characterized in that: it is a release pad to be set be bearing in capacitor body and be loaded between the pressure valve of electric capacity outer casing bottom, capacitor body places on this pad, by several set on this pad leakage holes, make capacitor body when being subjected to the air pressure impact, gas is discharged from leakage hole, thereby prevents capacitor body to be squeezed and the local deformation that produces; Between described capacitor body lower periphery and capacitor case inwall, be provided with and link to each other with the release pad and contain the ring-type rib of capacitor body bottom, prevent the radial deformation of capacitor body, the internal diameter of described ring-type rib is slightly larger than described capacitor core diameter.
Offer uniform leakage hole or ventilating groove on the sidewall within the described ring-type rib.
The present invention comprises capacitor case, terminal, fuse and pressure valve according to the designed a kind of aluminium electrolytic capacitor of said method, described pressure valve places outer casing bottom, fuse places in the shell inner cavity, link to each other with terminal, it is characterized in that: be provided with a release pad in described fuse bottom, between fuse bottom and pressure valve, on this release pad, be provided with the leakage hole that several hold gas travels through; Described release washer ends is provided with the ring-type rib that surrounds the fuse lower periphery, and the internal diameter of described ring-type rib is slightly larger than described fuse diameter.
Described leakage hole distributes along release pad uniform plane, and its gross area accounts for 30%～70% of whole release pad floor space;
Described pad and ring-type rib are selected for use has resin material high temperature resistant, that dimensional stability good, resistance to wear is good, and its resin adopts polyimide resin or modified epoxy;
Also can offer uniform leakage hole or ventilating groove on the sidewall within the described ring-type rib.
The invention provides a kind of method for designing that prevents deformation of capacitor core, it is between capacitor core and electric capacity shell, be provided with a release pad, when the electric capacity internal pressure is excessive when causing that pressure valve is opened, can be gas travels through by the some apertures on the release pad, thereby prevent that effectively fuse from local crimp taking place under gas percussion.In the present invention, ring-type rib and release pad are by resin manufacture high temperature resistant, that dimensional stability good, resistance to wear is good, and the ring-type rib that is arranged on the release washer ends can play the effect to the capacitor core location, prevent that capacitor core is because of rocking the radial deformation that brings, simultaneously, aperture that ring-type is uniform on every side or ventilating groove can be beneficial to the inner too much gas of electric capacity again to be passed through smoothly, discharge and discharge from pressure valve, effectively slow down the local pressure of capacitor core and the exhaust pressure of pressure valve from the periphery of capacitor core.The present invention can prevent effectively that large-sized capacitor core from the accident of crimp even short circuit burning taking place under internal pressure is impacted.On the basis of aluminium electrolytic capacitor pressure valve design, increase this design, can further improve the fail safe and the reliability of aluminium electrolytic capacitor, the fail safe that has also improved the electronic equipment that uses this aluminium electrolytic capacitor to a certain extent.
[description of drawings]
Fig. 1 is the present invention's aluminium electrolytic capacitor structural representation;
Fig. 2 is the structural representation of prior art aluminium electrolytic capacitor;
Fig. 3 release gasket construction of the present invention floor map;
Fig. 4 release gasket construction of the present invention end view;
Fig. 5 is a prior art aluminium electrolytic capacitor normal operating condition schematic diagram;
Fig. 6 for the aluminium electrolytic capacitor of prior art when pressure valve is opened, fuse produces the state diagram of crimp;
Fig. 7 is an aluminium electrolytic capacitor normal operating condition schematic diagram of the present invention;
Fig. 8 for aluminium electrolytic capacitor of the present invention when pressure valve is opened, fuse produces the state diagram of crimp.
Among the figure:
1, terminal; 2, joint filling material; 3, internal terminal and draw chaff;
4, fuse; 5, shell; 6, pressure valve;
7, release pad; 8, ring-type rib; 9, leakage hole;
10, leakage hole or ventilating groove.
[embodiment]
Below introduce characteristics of the present invention and advantage in detail by specific embodiments of the invention and accompanying drawing.
The invention provides a kind of method for designing that prevents deformation of capacitor core, it is a release pad to be set be bearing in capacitor core and be loaded between the pressure valve of electric capacity outer casing bottom, capacitor core places on this pad, by this pad and last several set leakage holes thereof, make fuse when being subjected to the air pressure impact, pad supports and can make gas to disperse to discharge from leakage hole effectively to fuse, can reduce the impact of gas greatly to capacitor core, thereby prevent the crimp that capacitor core takes place effectively, to avoid the generation of short circuit pyrophoricity accident.
Because capacitor core has certain clearance in the chamber in the enclosure, fuse also is easy to shake when being subjected to the air pressure impact, cause producing radial deformation, therefore, the present invention described capacitor core lower periphery, and the electric capacity outer casing inner wall between, be provided with and link to each other with the release pad and can contain the ring-type rib of capacitor core bottom, this rib can be fixed on the release pad, the release pad becomes as a whole, remedy the gap between capacitor core and the shell, in order to locate and to prevent the radial deformation of capacitor core to capacitor core.
Be illustrated as the aluminium electrolytic capacitor of the present invention according to above-mentioned method for designing design.
As shown in Figure 1, the designed aluminium electrolytic capacitor of the present invention comprises terminal 1, joint filling material 2, internal terminal and draw chaff 3, fuse 4, shell 5, pressure valve 6, described pressure valve 6 places shell 5 bottoms, fuse 4 places in the inner chamber that shell 5 constitutes, upper end and internal terminal with draw chaff 3 and link to each other, pressure valve 6 is arranged at the bottom, shell 5 upper ends seal with joint filling material 2, and terminal 1 face is from it drawn.As Fig. 2, shown in Figure 3, architectural feature of the present invention is: in described fuse 4 bottoms, be provided with a release pad 7, this pad is between fuse 4 bottoms and pressure valve 6, and it is identical with electric capacity shell 5 internal diameters and have a certain thickness disk to can be its diameter.On this release pad 7, be provided with several leakage holes that can hold gas travels through 9.Described leakage hole 9 distributes along the pad uniform plane, and its gross area accounts for 30%～70% of whole release pad 7 floor spaces.Like this, release pad 7 can be used to support capacitor core 4, leakage hole 9 on it can be beneficial to the inner too much gas dispersion of electric capacity again to be passed through smoothly from each leakage hole 9, discharge from pressure valve 6, so reduced the impact of gas, prevented that effectively fuse 4 from local crimp taking place under gas percussion to fuse 4
The present invention also is provided with the ring-type rib 8 that can surround fuse 4 lower periphery in the end of described release pad 7.The external diameter of this rib is identical with release pad 7 diameters, and internal diameter is slightly larger than the diameter of fuse 4.Ring-type rib 8 can play the effect to capacitor core 4 location, prevents that fuse 4 from rocking when being subjected to gas pressure, thereby causing fuse 4 distortion radially.Described release pad 7 and ring-type rib 8 are affixed mutually, add and can make an integral body man-hour, its material can adopt resin, and the resin material of selecting for use must have high heat resisting temperature, characteristics such as dimensional stability and resistance to wear are good are as selecting polyimide resin, modified epoxy etc. for use.
For further helping the smooth eliminating of gas, as shown in Figure 3, Figure 4, the present invention also can offer uniform leakage hole or ventilating groove 10 on sidewall within the described ring-type rib 8.The capacitor gas inside can be passed through along leakage hole on the sidewall within the ring-type rib 8 or ventilating groove 10, and leakage hole 9 is discharged from the release pad 7 again, and this mode has further reduced the extruding of gas to capacitor core 4.
When capacitor was in normal operating conditions, pressure valve 6 was closed sealing, and release pad 7 can support and locate fuse 4; When some fortuitous event in use appears in electric capacity, for example electronic equipment breaks down, perhaps under the situation of misoperation, an overrating voltage or a reverse voltage are added on the electrochemical capacitor, on electrochemical capacitor, added a voltage that exceeds normal value this moment, owing to reasons such as the generation of pellumina and extraordinary heatings, impel the capacitor internal pressure to rise rapidly.Even without breaking down or operation error, under normal circumstances use electrochemical capacitor, if on electric capacity, apply certain voltage for a long time, because the self-repair function of anodic alumina films also can produce gas, and the electrochemical capacitor internal pressure is risen gradually.In case the internal pressure of electric capacity surpasses a limit value, pressure valve 6 is opened.If do not place release pad 7 in the electric capacity, when pressure valve 6 is opened, a large amount of gases that accumulate electric capacity inside can spray by rapid opening from pressure valve 6, fuse 4 is under this moment, a large amount of air pressure impacted, be easy to take place local crimp, even therefore cause short circuit even burning (specifically seeing Fig. 5, shown in Figure 6).And after in electric capacity, adding release pad 7, when pressure valve 6 is opened, a large amount of gases that accumulate electric capacity inside can be discharged by pressure valve 6 openings along the shunting of ring-type rib 8 ventilating grooves and by the leakage hole 9 that distributes on the release pad 7 again, though also can being subjected to air pressure, impacts in fuse 4, but, can well prevent fuse 4 distortion (specifically seeing Fig. 7, shown in Figure 8) under air pressure impacts because the release pad 7 of the fuse 4 of supporting has certain thickness and hardness.
In order to check the anti-fuse deformation effect of particular design core gasket, the present invention has prepared a collection of aluminium electrolytic capacitor that has 7 supportings of release pad and do not have the release pad respectively, and its specification is 450V, 6800 μ F, and Φ 90mm * 150mm, quantity respectively is 25.All apply overvoltage (650V, 10A) above load voltage value, because the rated voltage that overvoltage electrochemical capacitance far away can bear, owing to reasons such as the generation of pellumina and extraordinary heatings, the capacitor internal pressure rises rapidly, and also within a short period of time, pressure valve was opened, and check has 7 supportings of release pad and do not have the aluminium electrolytic capacitor situation that fuse 4 is out of shape and burns when pressure valve is opened of release pad 7.
It the results are shown in shown in the following table.
Learn that by experimental result behind the increase release pad 7, the accident of crimps even short circuit burning takes place fuse 4 in the time of can effectively preventing pressure valve 6 unlatchings.
Claims (7)
1. method that prevents capacitor body distortion, it is characterized in that: it is a release pad to be set be bearing in capacitor body and be loaded between the pressure valve of electric capacity outer casing bottom, capacitor body places on this pad, by several set on this pad leakage holes, make capacitor body when being subjected to the air pressure impact, gas is discharged from leakage hole, thereby prevents capacitor body to be squeezed and the local deformation that produces; Between described capacitor body lower periphery and capacitor case inwall, be provided with and link to each other with the release pad and contain the ring-type rib of capacitor body bottom, prevent the radial deformation of capacitor body, the internal diameter of described ring-type rib is slightly larger than described capacitor core diameter.
2. the method that prevents the capacitor body distortion according to claim 1 is characterized in that: offer uniform leakage hole or ventilating groove on the sidewall within the described ring-type rib.
3. aluminium electrolytic capacitor, comprise capacitor case, terminal, fuse and pressure valve, described pressure valve places outer casing bottom, fuse places in the shell inner cavity, link to each other with terminal, it is characterized in that: be provided with a release pad in described fuse bottom, between fuse bottom and pressure valve, on this release pad, be provided with the leakage hole that several hold gas travels through; Described release washer ends is provided with the ring-type rib that surrounds the fuse lower periphery, and the internal diameter of described ring-type rib is slightly larger than described fuse diameter.
4. aluminium electrolytic capacitor according to claim 3 is characterized in that: described leakage hole distributes along release pad uniform plane, and its gross area accounts for 30%～70% of whole release pad floor space.
5. aluminium electrolytic capacitor according to claim 3 is characterized in that: described pad and ring-type rib are selected for use has resin material high temperature resistant, that dimensional stability good, resistance to wear is good.
6. aluminium electrolytic capacitor according to claim 3 is characterized in that: offer uniform leakage hole or ventilating groove on the sidewall within the described ring-type rib.
7. aluminium electrolytic capacitor according to claim 5 is characterized in that: described resin adopts polyimide resin or modified epoxy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100635217A CN101013631B (en) | 2006-11-08 | 2006-11-08 | Method for preventing deformation of capacitor core and aluminum electrolytic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100635217A CN101013631B (en) | 2006-11-08 | 2006-11-08 | Method for preventing deformation of capacitor core and aluminum electrolytic capacitor |
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| Publication Number | Publication Date |
|---|---|
| CN101013631A CN101013631A (en) | 2007-08-08 |
| CN101013631B true CN101013631B (en) | 2011-07-20 |
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| CN2006100635217A Expired - Fee Related CN101013631B (en) | 2006-11-08 | 2006-11-08 | Method for preventing deformation of capacitor core and aluminum electrolytic capacitor |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794375B (en) * | 2014-01-16 | 2017-02-01 | 深圳江浩电子有限公司 | Aluminum electrolytic capacitor |
| CN107369568A (en) * | 2017-08-30 | 2017-11-21 | 陕西千山航空电子有限责任公司 | A kind of ultracapacitor core body ruggedized construction |
| CN109817462A (en) * | 2019-04-11 | 2019-05-28 | 寿乐鹏 | A kind of aluminium electrolutic capacitor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1204133A (en) * | 1997-06-25 | 1999-01-06 | 松下电器产业株式会社 | Aluminium electrolytic condenser |
| CN1412794A (en) * | 2002-12-05 | 2003-04-23 | 叶介玉 | Non-explosive capacitor |
-
2006
- 2006-11-08 CN CN2006100635217A patent/CN101013631B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1204133A (en) * | 1997-06-25 | 1999-01-06 | 松下电器产业株式会社 | Aluminium electrolytic condenser |
| CN1412794A (en) * | 2002-12-05 | 2003-04-23 | 叶介玉 | Non-explosive capacitor |
Non-Patent Citations (5)
| Title |
|---|
| JP特开2002-289482A 2002.10.04 |
| JP特开2005-294463A 2005.10.20 |
| JP特开平10-74671A 1998.03.17 |
| JP特开平8-288187A 1996.11.01 |
| JP特开平9-320899A 1997.12.12 |
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| CN101013631A (en) | 2007-08-08 |
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Owner name: DONGGUAN WAN LI XIN NEW MATERIAL COMPONENT CO., L Free format text: FORMER OWNER: SHENZHEN RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY Effective date: 20081017 |
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