CN1134030A - Method for making electrolytic capacitor - Google Patents
Method for making electrolytic capacitor Download PDFInfo
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- CN1134030A CN1134030A CN 95109452 CN95109452A CN1134030A CN 1134030 A CN1134030 A CN 1134030A CN 95109452 CN95109452 CN 95109452 CN 95109452 A CN95109452 A CN 95109452A CN 1134030 A CN1134030 A CN 1134030A
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- lead terminal
- binding agent
- main body
- electrolyte
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- 239000003990 capacitor Substances 0.000 title claims abstract description 152
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000011230 binding agent Substances 0.000 claims abstract description 108
- 239000003792 electrolyte Substances 0.000 claims abstract description 71
- 239000011888 foil Substances 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 38
- 238000004519 manufacturing process Methods 0.000 claims description 30
- 229910052742 iron Inorganic materials 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 17
- 238000013022 venting Methods 0.000 claims description 17
- 125000006850 spacer group Chemical group 0.000 claims description 12
- 230000032683 aging Effects 0.000 claims description 9
- 239000013536 elastomeric material Substances 0.000 claims description 8
- 230000002265 prevention Effects 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000007598 dipping method Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- 230000002687 intercalation Effects 0.000 claims description 2
- 238000009830 intercalation Methods 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 abstract description 15
- 238000004804 winding Methods 0.000 abstract description 4
- 239000003822 epoxy resin Substances 0.000 description 18
- 229920000647 polyepoxide Polymers 0.000 description 18
- 239000004734 Polyphenylene sulfide Substances 0.000 description 16
- 229920000069 polyphenylene sulfide Polymers 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 12
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- 238000010586 diagram Methods 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
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- 239000011324 bead Substances 0.000 description 2
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Abstract
The invention relates to a making method for an electrolytic capacitor and prevents the leakage of electrolyte in the electrolytic capacitor, prolongs the service life and improves the reliability of the electrolytic capacitor by making use of simple structure and simple means. The specific making method is characterized in that a main capacitor body 7 is formed by winding an anode foil 2 bonded with a lead terminal 1, and a cathode foil 3 bonded with the lead terminal 1 and a distance sheet 4 or 5; a seal body 8 which is made of rubber and is provided with a hole which is cut through by the lead terminal is cut through on the lead terminal 1 and is arranged on the main capacitor body 7 after a binder 13 is added to the hole or the lead terminal 1, and the binder is completely hardened through the heating treatment; the electrolyte is dipped in the main capacitor body 7 which is then inserted into an outer shell 9 to be sealed.
Description
The present invention relates to prevent that electrolyte is dry, improve the method for the manufacturing electrolytic capacitor of reliability.
The reason that electrolytic capacitor damages is a lot, scatters and disappears but main cause is an electrolyte, therefore, must improve this, to improve reliability.
Figure 11 is the perspective view of major part that is illustrated in each member of capacitor of master operation, makes the method for electrolytic capacitor in order to explanation.Figure 12 is the perspective key diagram that is illustrated in the electrolytic capacitor major part in the master operation, in order to the manufacturing of explanation same electrical electrolysis condenser.
With reference to Figure 11 (A)
11(A)-(1)
For example form lead terminal 1 by making the lead-in wire 1A that makes by iron wire or copper wire strike out flat installation portion 1B solder bond made of aluminum with its end.
With reference to Figure 11 (B)
11(B)-(1)
By using,, make its surface roughening to for example being that corrode on the surface of the anode foils 2 of material with aluminium with wet corrosion method such as the mixed liquor of for example hydrochloric acid or sulfuric acid, nitric acid, acetate etc. as corrosive agent.
11(B)-(2)
By using anode oxidation method, anode foils 2 is impregnated into carries out surperficial chemical combination in the electrolyte and form oxide-film.
11(B)-(3)
With riveting or ultrasonic bonding lead terminal 1 is fixed to anode foils 2 and the Cathode Foil 3 for example done by aluminium on.
With reference to Figure 11 (C) and (D)
11(C)-(1)
With anode foils 2, by spacer 4, Cathode Foil 3 that insulating paper is made, the spacer of being made by insulating paper 5 is piled up, and integral body is rolled into the garden cylindricality, fixes the end with spooling band 6 and forms capacitor main body 7.
With reference to Figure 12 (A)
12(A)-(1)
Capacitor main body 7 is placed vacuum impregnation plant, making decompression in the device get rid of air in the capacitor main body 7 after, inject electrolyte.
The electrolyte that injects immerses in the pore that makes the generation of anode foils 2 surface roughenings.
In addition to the above methods, also may be implemented in the simple method that only capacitor main body 7 is impregnated in the atmosphere in the electrolyte.
With reference to Figure 12 (B)
12(B)-(1)
The seal 8 that to be made by rubber is sealed aluminum hull 9 after the lead-in wire 1A that draws from capacitor main body 7 is pressed into, form the flanging portion 10 that is called crimping and seal in seal 8 and aluminum hull 9 part that contacts.
With reference to Figure 12 (C)
12(C)-(1)
Carry out external packing as required.During external packing, put usually and be printed with the heat-shrinkable tube 11 of making place name, model, specification, lot number, polarity etc.
12(C)-(2)
Keep carrying out in about one hour ageing under about 10% high voltage and the ceiling temperature improving in serviceability temperature than rated voltage.This is the defective of repairing the oxide-film in the anode foils 2 that main work in-process causes for the self-repair function that utilizes electrolytic capacitor.
The difference that this aging condition is created conditions with electrolytic capacitor and difference, each manufacturing firm according to circumstances stipulates various aging conditions.
12(C)-(3)
Test by product specification, reject substandard products.
Usually, the electrolytic capacitor life-span lacks as you know, thereby reliability is low, and ordinary circumstance can guarantee 1000～2000 hours life-span at most.
In most electronic component elements,, in numerous use products, be special case, so can not be replaced by other capacitor because of having the advantage that overwhelms from aspects such as small-sized, big capacity, low price though be short like this element of life-span.
But with high performance, the densification of electronic equipment, the while is the strong request electrolytic capacitor long-life also.
Usually, the reason that electrolytic capacitor damages has that electrolyte is rotten, alumite is impaired or the like, and main cause is scattering and disappearing of electrolyte, thereby if can prevent that electrolyte is dry, just can life-saving.
Known electrolytes is lost by the seal 8 of rubber system.But, though such shortcoming is arranged, because assembling easily, and as explanation in above-mentioned process B-(4), when the crimping that carries out in order to repair-deficiency, press liter because of produce hydrogen in Cathode Foil 3 in making, also to use the rubber that easily sees through hydrogen in order to prevent that aluminum hull from damaging.
In general life test, be that electric capacity is placed the situation of measuring characteristic degradation under the environmental condition of maximum operation (service) temperature, under such static environment condition, mainly be that electrolyte spread in the seal 8 of rubber system and to the form of outside.
But, in actual user mode, be to the capacitor inner heat of switching on, and also condition changes.Under such dynamic environment condition,, cause that electrolyte or electrolyte steam spill because the increase and decrease of internal pressure surpasses the sealing limit between lead terminal 1 and the seal 8.
Under above-mentioned such dynamic environment condition, even under the user mode in the rated range of electricity, the life-span also is reduced to 1/5th～6, and this is experimental verification.
Particularly, be about 1.5[air pressure at first in the sealing limiting pressure on the joint interface of lead terminal 1 and seal 8] about, just drop to 1[air pressure after about 6 months] below.
When being installed to capacitor on the printed circuit board (PCB), stress is added on the lead terminal 1 mostly, particularly when being separated with dimensional discrepancy between the interval of lead terminal 1 and the patchhole that forms on printed circuit board (PCB), is subjected to big stress on lead terminal 1.
Seemingly like this, owing to there are all mal-conditions, near the sealing forfeiture the electrolytic capacitor lead terminal causes electrolyte to scatter and disappear, and makes the lost of life.
Scattering and disappearing of above-mentioned such electrolyte, experience show can make electrical equipment produce contingency.
In recent years because the electrolyte property of γ-J lactone as solvent adopted well and one after another, but this electrolyte boiling point is up to 204 ℃, in the time of on draining to printed circuit board (PCB), owing to be difficult to evaporation, short circuit becomes the reason that causes short circuit between printed circuit board, owing to can cause burnout failure.
Now occurred above-mentioned such electrolyte is spilt the electrolytic capacitor of having taked all countermeasures.But also do not find really effectively.Below the one example is described.
Figure 13 is in the present invention in order to the major part sectional view of explanation as an electrolytic capacitor that improves object, the symbolic representation same section identical with the used symbol of Figure 11 and Figure 12 or have same meaning.
Among the figure, the 12nd, epoxy resin film.
This electrolytic capacitor by with the identical substantially technology of the technology of Figure 11 and Figure 12 explanation is made, unique difference is in operation 12 (C)-(2) afterwards, flows to epoxy resin and make it sclerosis to form epoxy resin film 12 on the surface of the seal 8 of rubber system.
But, in the manufacturing of electrolytic capacitor shown in Figure 13, when forming epoxy resin film 12,, must after capacitor main body 7 being sealed in the aluminum hull, carry out because liquid epoxy resin is flowed into along whole surface.
Its reason is not finish the step that capacitor main body 7 is sealed to aluminum hull, just can not make liquid epoxy resin flow distribution.
The epoxy resin that uses in above-mentioned such step must be normal temperature hardened.Its reason is that electrolyte will be impaired, and the steam of electrolyte also hinders the sclerosis of epoxy resin if will increase temperature for sclerosis.
Yet, the epoxy resin that characteristic is good is the high temperature constrictive type mostly, for example the sealed semiconductor device epoxy resin used uses hardening temperature more than 170 ℃ mostly, can not get good sealing property with normal temperature hardened epoxy resin, can not prevent fully that electrolyte from spilling.
And normal temperature hardened epoxy resin lacks the thermal endurance that fusing scolding tin is welded the high temperature that is produced, and perhaps lacks the reliability with the lead terminal sealing.
In order to solve the technical problem of above-mentioned use epoxy resin, also can use coated polyfurolresin on the outer surface of the seal of rubber system or medial surface.At this moment, owing to when the polyfurolresin coated is to seal 8, carried out heat treatment, thus do not produce above-mentioned problem when making epoxy cure like that, thereby improved the problem that electrolyte scatters and disappears by seal 8.
But, according to this prior art, when connecting lead terminal 1 in the hole of inserting seal 8, though be suitable pressure to be added to capacitor main body 7 be pressed into, but in the hole of seal 8, owing to only contact between lead terminal 1 and the seal 8, so can not prevent fully that electrolyte from spilling by thrust.
The purpose of this invention is to provide the simple structure of a kind of usefulness and prevent that with simple means electrolyte spills in the electrolytic capacitor, can improve the manufacture method of the electrolytic capacitor of life-span and reliability.
In the present invention, basically be in capacitor main body under the state of dipping before the electrolyte, at least be formed on that seal or binding agent stop in the lead terminal inserting hole on the body or it closely is close to and applies the binding agent that stops body in order to bonding lead terminal of drawing from capacitor main body and seal or binding agent, making it high warm hardening.
That is to say, comprise following operation in according to electrolytic capacitor manufacture method of the present invention: the Cathode Foil (for example Cathode Foil 3) of the anode foils (for example anode foils 2) of will bond lead terminal (for example lead terminal 1) and bondd lead terminal (for example lead terminal 1) and spacer (for example spacer 4 and 5 etc.) wind up and form capacitor main body (for example capacitor main body 7); Then, can be inserted the seal (for example seal 8 of rubber system) in logical hole by above-mentioned lead terminal along making by elastomeric material and having, binding agent (for example binding agent 13) is applied to above-mentioned hole or it closely is close to, inserts logical sealing body with above-mentioned lead terminal subsequently and be installed on the above-mentioned capacitor main body; Subsequently, heat-treat, above-mentioned binding agent is hardened fully, above-mentioned lead terminal and above-mentioned seal bond; Make again in the above-mentioned capacitor main body and flood electrolyte; Then, the capacitor main body that has assembled above-mentioned seal is inserted in the shell (for example aluminum hull 9) seal.
Further comprise by slotting leading to of the above-mentioned lead terminal that has applied binding agent making and have and to be installed to the operation on the above-mentioned capacitor main body by the seal in the interspersed hole of above-mentioned lead terminal by elastomeric material.
Second kind of manufacture method of the present invention comprises following operation: the Cathode Foil (for example Cathode Foil 3) of the anode foils (for example anode foils 2) of will bond lead terminal (for example lead terminal 1) and bondd lead terminal (for example lead terminal 1) and spacer (for example spacer 4 and 5 etc.) wind up and form capacitor main body (for example capacitor main body 7); Then, make and have and to be stoped body (for example binding agent stops body 14) by the binding agent in the slotting hole that leads to of above-mentioned terminal, be installed on the above-mentioned capacitor main body inserting with above-mentioned lead terminal to lead to by elastomeric material; Capacitor main body that above-mentioned binding agent stops body will be installed again be inserted with venting with the double shell (for example shell 15) of doing the opening (for example opening 15A) that injects used for electrolyte, apply binding agent (for example binding agent 16) in that above-mentioned binding agent prevention body one side is housed then; Then heat-treat above-mentioned binding agent is hardened fully, bond above-mentioned lead-in wire and above-mentioned binding agent prevention body are encapsulated into capacitor main body in the shell simultaneously; Subsequently, inject electrolyte with the double opening that injects used for electrolyte of doing, electrolyte is impregnated in the above-mentioned capacitor main body from above-mentioned venting; Then, above-mentioned venting with the double closure of openings of injecting used for electrolyte of doing, is sealed above-mentioned shell again.
And then the third manufacture method of the present invention comprises the steps: the Cathode Foil (for example Cathode Foil 3) of the anode foils (for example anode foils 2) of bondd lead terminal (for example lead terminal 1) and bondd lead terminal (for example lead terminal 1) and spacer (for example spacer 4 and 5 etc.) wound up and forms capacitor main body (for example capacitor main body 7); Then above-mentioned capacitor main body is inserted with and exits with the double shell (for example shell 15) that injects used for electrolyte opening (for example opening 15A) of doing; To there be the binding agent in the hole that can hold above-mentioned terminal to stop body (for example binding agent stops body 20 or 24 etc.) to be installed on the above-mentioned lead terminal again, and make with above-mentioned capacitor main body to combine; The above-mentioned binding agent that is equipped with that then binding agent (for example binding agent 16) is applied on the above-mentioned shell stops that side of body; Heat-treat, above-mentioned binding agent is hardened fully, bonding above-mentioned binding agent stops body and above-mentioned lead terminal, simultaneously capacitor main body is encapsulated in the shell; Subsequently, inject electrolyte with the opening that double as injects used for electrolyte, in above-mentioned capacitor main body, flood electrolyte from above-mentioned venting; Then, with the closure of openings of above-mentioned venting, seal above-mentioned shell again with double as injection used for electrolyte.
In above-mentioned second, third kind manufacture method of the present invention, it is characterized in that further binding agent being stoped body (for example binding agent stops body 24) to separate (for example half partly 241 and 242) along the line of the pair of holes (for example hole 24A) by holding lead terminal.
As further according to the present invention, in the manufacture method of above-mentioned second, third invention, comprise stop body to insert shell the binding agent after, with the part of heating iron (for example heating iron 21) heating and the above-mentioned shell of conquassation, be pressed in above-mentioned binding agent and stop operation on the body.
As further according to the present invention, in the manufacturing of above-mentioned second, third invention, comprise with advancing above-mentioned opening with key (example the is gone into key 17) intercalation that double as injects the opening of used for electrolyte, in the operation of its front end and the contacted state lower sealed outer housing of capacitor main body in order to the sealing venting.
As further according to the present invention, comprise also that in above-mentioned second, third invention the heating iron (for example with reference to Fig. 5) that uses its front end that concave curved surface is arranged seals used for electrolyte is injected in venting with double as opening, behind the closure, the temperature that reduces above-mentioned heating iron is with its operation of taking off from shell again.
Owing to adopt above-mentioned means, the sealing between the seal of lead terminal and rubber system is improved, electrolyte does not just spill from this.Also because the sclerosis of the binding agent between bonding sealing lead terminal and seal or the binding agent prevention body is to carry out under the non-existent condition of electrolyte, so can for example under the high temperature that epoxy adhesive can harden well, implement, thereby improve its fluid tightness.And then, can seal simply by putting heating iron etc. in order to venting and the opening that injects electrolyte, so implement easily also because after shell is advanced in the capacitor main body liquid seal ground encapsulation that will draw lead terminal.
Fig. 1 is in order to the sectional view of explanation by the major part of the electrolytic capacitor of the present invention's making.
Fig. 2 is that the perspective view that is illustrated in the major part of the electrolytic capacitor in the master operation is made the operation of electrolytic capacitor in order to explanation by the present invention.
Fig. 3 is the sectional view of the electrolytic capacitor major part in the master operation of the operation of the opening of using the key can in order to detailed description.
Fig. 4 is the sectional view of the major part of the electrolytic capacitor in the master operation of other examples of the technology of the peristome of using corpse or other object for laboratory examination and chemical testing can in order to explanation.
Fig. 5 is in order to the sectional view of explanation with the major part of the electrolytic capacitor in the master operation of other example in the technology of the peristome of key can.
Fig. 6 is in order to the sectional view of explanation by the major part of an example of the electrolytic capacitor that rigid body is stoped body as binding agent of the present invention's manufacturing.
Fig. 7 is the decomposition diagram with the major part of the similar electrolytic capacitor of electrolytic capacitor of relevant Fig. 6 explanation.
Fig. 8 is in order to the sectional view of explanation by the major part of the electrolytic capacitor that rigid body is stoped body as binding agent of the present invention's manufacturing.
Fig. 9 is the key diagram of expression in order to the major part of the technological process of explanation winding mode.
Figure 10 is the major part perspective view that explanation used suitable binding agent when adopting the winding mode stops body.
Figure 11 is the perspective view that is illustrated in order to the major part of each member of capacitor in the master operation that the electrolytic capacitor manufacture method is described.
Figure 12 is the perspective view that is illustrated in the electrolytic capacitor major part in the master operation of manufacturing of explanation electrolytic capacitor.
Figure 13 is the perspective view in order to the major part of an electrolytic capacitor of explanation conduct improvement in the present invention object.
Fig. 1 is the sectional view of the major part of the electrolytic capacitor made by the present invention in order to explanation, the symbolic representation same section identical with symbol used among Figure 13 or have same meaning.
13 be to represent epoxy adhesive for example among the figure.
When making this electrolytic capacitor, the technology that at first is used in Figure 11 explanation is made capacitor main body 7.Then with the binding agent coated on the lead terminal 1 of from this capacitor main body 7, drawing, after perhaps in the hole of the seal 8 of rubber system, being inserted into seal 8 on the lead terminal 1 the binding agent coated, 190 ℃ of following heat treatments of temperature for example 10 minutes, make the binding agent sclerosis.
At this moment, can use multiple material as binding agent, for example pulverous epoxy resin, powder epoxy resin made sleeve shaped or make the body that is compressed into of hollow bead shape, can become liquid form etc. is object, material also is not limited to epoxy resin, for example can use phenolic resins, silicone resin, polyfurolresin etc.
Wherein when using dusty material, lead terminal 1 or seal 8 are heated to suitable temperature, can be under the state that powder is fused to a certain degree coated.
Also be processed into sleeve-shaped or be processed into the body that is compressed into of hollow bead shape, this is compressed into the body setting-in to lead terminal, it is connected in the hole of injecting seal 8, also can be in contrast, advance in the hole of seal 8 being compressed into the body setting-in, lead terminal is connected insert this place.
Also have, liquid material, also be certainly coated on lead terminal 1 or seal 8, this seems simply, and is least suitable in fact.
Then, the capacitor main body 7 that above-mentioned seal 8 is housed is put in the vacuum impregnation plant, gets rid of air in the capacitor main body 7 by making in the device decompression, and then inject electrolyte.Injection about this electrolyte it should be noted that, and is the same with prior art, electrolyte entered fully make in the surface grain aperture that roughening produced of anode foils 2.
Cover is gone up aluminum hull 9 again, forms the flanging portion 10 that is referred to as to call crimping in the contact portion of seal 8 and aluminum hull 9, seals.
Then apply outer dress as requested.Dress is the same with prior art in addition, can coat with the heat-shrinkable tube that is printed with the name of manufacturer, model, specification, lot number, polarity etc. on it.
Subsequently, under high 10% the high pressure than rated voltage, the temperature maintenance that is added to the serviceability temperature upper limit was carried out ageing in about 1 hour.
During ageing,, owing to covering for not bonded dose 13, the part of the seal 8 of rubber system exposes, so hydrogen is emitted without any problem even Cathode Foil produces hydrogen.
Then, check, pick out substandard products, only take out the qualified product of being finished by product specification.
Fig. 2 is the perspective view of major part that is illustrated in the electrolytic capacitor of master operation, make the technology of electrolytic capacitor according to the present invention in order to explanation, describe the symbology same section identical or have same meaning below with the used symbol of Fig. 1, Figure 11～Figure 13 referring to this figure.
With reference to Fig. 2 (A)
2(A)-(1)
When making the electrolytic capacitor of present embodiment, use and make capacitor main body 7 in the identical technology of technology illustrated in fig. 11.
2(A)-(2)
Then, the lead terminal that will draw from capacitor main body 71 connects and for example inserts that the binding agent of rubber system stops in the hole of body 14, overlaps upper shed 15A then and is positioned at shell 15 on the end face.
Here, binding agent stops body 14 different with seal 8, and it does not play a part capacitor main body is sealed in the shell 15, and to stop when for example bonding or liquid-state epoxy resin flows with powder epoxy resin binding agent to flow into shell 15 interior and be provided with.
And shell 15 its materials for example are polyphenylene sulfide (polyphen ylenesulfide:PPS), at its end face electrolyte are set and inject the exhaust opening 15A that holds concurrently.
Because the PPS resin is a heat-resistant resin, because the influence that the electrolyte that can adequately protect is not melted the high temperature that is produced in the scolding tin process, thereby suitable mounted on surface.
With reference to Fig. 2 (B)
2(B)-(1)
Subsequently, it is bonding to stop body 14 1 sides to be carried out at the binding agent of shell 15 binding agents such as epoxy resin, for example is preferably in that 160 ℃ of high temperature keep heat-treating in 30 minutes, so that the gas-tight seal of lead terminal 1 is carried out in stick 16 sclerosis.In Fig. 2 (B), with shell 15 biopsy cavity marker devices so that can have an X-rayed its inside.
Here, binding agent 16 can be any states such as powder, liquid state with the same at embodiment illustrated in fig. 1, also can make the sheet that can be inserted logical hole by lead end.When doing slabbing, stop body 14 to be laminated into one, processing ease with binding agent.
2(B)-(2)
Then, said modules integral body is put in the vacuum impregnation plant, makes decompression in the device, the air in the shell 15 is got rid of from opening 15A.
2(B)-(3)
2(B)-(4)
Then, under the high voltage than rated voltage high about 10%, the temperature that is added to the serviceability temperature upper limit keeps carrying out in about 1 hour ageing.
During ageing, even Cathode Foil produces hydrogen, owing to be communicated with outside atmosphere by opening 15A in the shell 15, releasing hydrogen gas does not have any problem.
With reference to Fig. 2 (C)
2(C)-(1)
Subsequently, use the opening 15A of key 17 cans of making by rubber or plastics elastomeric material 15.
At this moment, keep making the top contacting structure of front end and the capacitor main body 7 of key 17,, also can alleviate the stress that adds to lead terminal 1 even when capacitor main body 7 vibrates afterwards.In a single day stress be added to lead terminal 1 because leakage current increases, and loss increase etc. become the reason of mis-behave.
With reference to Fig. 2 (D)
2(D)-(1)
After lead terminal 1 being processed into the shape of necessity, detect, remove substandard products, take out the qualified product of being finished by the product specification characteristic.
Fig. 3 is the sectional view of the major part of the electrolytic capacitor in master operation, and in order to describe the technology with key can opening in detail, the symbology same section with used symbol is identical among Fig. 2 perhaps has same meaning.
As seen from the figure, when making and its front end is conical key 17 when the opening 15A of shell 15 is pressed into by elastomeric material, its front end enters in the volume core of capacitor main body 7 aerial, but still can remain on the upper end of capacitor main body 7, and such structure can make vibration strength improve.
Fig. 4 is the sectional view of the major part of electrolytic capacitor in master operation, and in order to explanation another example with the technology of key can opening, the symbology same section with used symbol is identical among Fig. 2 perhaps has same meaning.
As seen from the figure, the key 17 that the PPS material is made is placed on the opening 15A of shell 15, makes the periphery of opening 15A and key 17 weld sealing by the ultrasonic irradiation from ultrasonic welding horn 18.
At this moment, suitably select the shape and size of key 17 etc., make it can remain on the upper end of capacitor main body 7.
Fig. 5 is the sectional view of the major part of the electrolytic capacitor in master operation, is used for illustrating other example of can opening process, with used symbol is identical among Fig. 2 symbology same section or have same meaning.
As seen from Figure 3, owing on the periphery of the peristome 15A of shell 15, form flange portion 15B,, the contact of the heating iron of high temperature is pressed on this flange portion 15B with its conquassation plug for seal opening 15A by being pressed.
In the present embodiment, suitably select the height of flange portion 15B promptly to heat amount of resin, heating-up temperature, the heating time of conquassation, the PPS resin of melting is extruded in shell 15 from opening 15A, can make it outstanding like that as shown.This ledge is the same with key 17 shown in Figure 3, and the last end in contact with capacitor main body 7 can help to improve vibration strength.
For remaining the so repeated good shape of diagram in the shape of the deposited part above the shell 15 equally, after welding finished, the cooling heating iron was as long as take off it behind the PPS resin solidification.
But, stoping body 14 different with the binding agent among the embodiment of explanations such as Fig. 2 or Fig. 3 with seal 8 shown in Figure 1, himself do not have the effect of liquid seal, it is just passable to stop binding agent 16 to flow in the shell 15 basically, nor requirement has through the character of hydrogen etc.
By the premises as can be known, stop body 14, except that elastomeric material, also can use the high material of thermal endurance that does not damage electrolyte, for example identical PPS resin or polyfurolresin etc. with shell 15 as binding agent.Mainly be to carry out accurate processing binding agent 16 can not be stoped between the body 14 from lead terminal 1 and binding agent, and binding agent stop between body 14 and the shell 15 by just can.
Above-mentioned so-called accurate processing means that interval that the interval of lead terminal 1 and binding agent resistance body 14 and binding agent stop body 14 and shell 15 below 20 μ m, do not had difficulty but carry out such processing now.
Thereby it is fully possible using rigid bodies such as PPS resin, polyfurolresin to stop the material of body 14 as binding agent.When using such rigid body, by applying binding agent 16, make binding agent stop body 14, shell 15, binding agent 16 to become overall structure, be able to take the harsh service condition of electrolytic capacitor fully, for example temperature is 105 ℃, internal pressure 3kg/cm
2And different with rubber, when using rigid body, correctly determine the position of lead terminal 1, directions etc. also have the little advantage of product deviation.
Fig. 6 is the sectional view of major part of an example that made in accordance with the present invention rigid body is stoped the electrolytic capacitor of body in order to explanation as binding agent, the part that the symbology identical with symbol used among Fig. 1～Fig. 5 is identical or have identical meaning.
Outside the electrolytic capacitor of illustrated electrolytic capacitor and Fig. 1～shown in Figure 5 different be binding agent stop body 20 by rigid body for example the PPS resin constitute.Because it is rigid bodies that binding agent stops body 20, so can utilize screw structural to combine with shell 15.
Certainly, such screw structural is structure not necessarily, even the binding agent prevention body that only is circular plate type also is fully can be practical, for example the binding agent shown in Fig. 2, Fig. 3 etc. is stoped rigidity replacements such as body 14 usefulness PPS resins, polyfurolresin, can obtain various good effects.
So, as shown in Figure 6, on the periphery of binding agent resistance body 20, carve and put pin thread 20A, thereby correspondingly on the inboard that the opening of the insertion capacitor main body 7 of shell 15 closely is close to, carve and put negative thread 15C.
Thereby, lead terminal 1 is connected in the hole of inserting binding agent prevention body 20, make capacitor main body 7 and binding agent stop body 20 combinations, can closely be integral among the negative thread 15A with the pin thread 20A precession shell 15 of binding agent resistance body 20, apply binding agent 16 thereon again and can realize the better fluid sealing.Like this, make binding agent stop body 20 and shell 15 incorporate structures, so the advantage that mechanical strength is improved is also arranged owing to can make.
Here used helicitic texture and common screw thread relatively, big more satisfactory of pitch.Its reason is to make easily during with compression moldings such as PPS resins, and assembling easily.
Fig. 7 is the decomposition diagram of the major part of the expression electrolytic capacitor similar with electrolytic capacitor illustrated in fig. 6, the part that the symbology identical with symbol used among Fig. 6 is identical or have identical meaning.
Stop the pin thread 20A that forms coarse pitch thread on the periphery of body 20 at binding agent, on the inboard that the opening of the insertion capacitor main body 7 of shell 15 closely is close to, form the negative thread 15C of identical coarse pitch thread.
Stop at binding agent between the pair of holes 20B that can be connected of body 20, can seize twisting on both sides by the arms with anchor clamps easily in binding agent being stoped body 20 screw thread precession shells 15 time, form fillet 20C by lead terminal 1.Also can form flat recess or the cross recess that the front end of screwdriver etc. can insert and replace this projection 20C.
Fig. 8 also is the sectional view of major part, in order to explanation made in accordance with the present invention with rigid body with make the electrolytic capacitor that binding agent stops body, the part that the symbology identical with the used symbol of Fig. 1～Fig. 7 is identical or have identical meaning.
In the drawings, (A) be the plane of seeing the major part that applies the electrolytic capacitor before the binding agent from the bottom surface, (B) be the side section of edge major part of visible X-X line on the plane of above-mentioned major part, 15D stops that binding agent stops the extension of body 20,15E is a heating conquassation part, the 21st, and heating iron.
In the present embodiment, binding agent stops body 20 to be installed on the lead terminal 1 of capacitor main body 7, its whole insertion in the shell 15, make binding agent stop the edge of body 20 to stop on the extension 15D of shell 15, press with heating iron 30 and to press after the heating conquassation part 15E, as in the drawings shown in the with dashed lines, conquassation heating conquassation part 15E can be adhesively fixed binding agent resistance body 20 on shell 15.
After this, the same with other embodiment, by applying binding agent 16 and making its curing carry out liquid seal, then make in the shell 15 and inject electrolyte after the exhausts by opening 15A, carry out ageing again after, for example as among Fig. 5 (B), illustrating, use heating iron sealing opening 15A, power cut-off.
In above-mentioned technology, during heating conquassation heating conquassation part 15E, being preferably in to press under binding agent prevention body 20 a little melting situations presses heating iron 21 to make adhesion strength become big, if will use present embodiment at the helicitic texture among Fig. 6 and the embodiment illustrated in fig. 7 simultaneously again, will improve fluid tightness more.
Be necessary to use at least the material of thermoplastic resin as shell 15 under the situation of present embodiment, the result was also good when binding agent resistance body 20 also used thermoplastic resin, so can use of a sort for example PPS resin.
What PPS was correlated with usually is bonding so uneasy, though the epoxy adhesive reliability is the highest in binding agent, and also fully can not be bonding with the molded side of PPS resin.
Therefore, the molded side of PPS resin is carried out sandblast, ultraviolet irradiation, in embodiment illustrated in fig. 8, owing to become matsurface by the thermal welding face of heating iron, with the caking property raising of epoxy resin.
But electrolytic capacitor is to produce in a large number with automated manufacturing system mostly usually, adopts so-called conveyer belt mode under the sort of situation.
Fig. 9 is the key diagram of expression with the major part of the technological process of explanation conveyer belt mode, the symbology same section identical with the used symbol of Fig. 1～Fig. 8 or have same meaning.
22 is conveyer belts among the figure, the 23rd, and the electrolytic capacitor of being processed.
In the conveyer belt mode as seen from the figure, with be equipped with the aluminium foil of lead terminal 1 and insulating paper etc. stacked, reel and make capacitor main body 7, the part of lead terminal 1 is temporarily stayed on the conveyer belt 22, drive this conveyer belt 22, from the parts that constitute by the capacitor main body 7 of drawing lead terminal 1, these parts are processed while transmitting by process route, made electrolytic capacitor 23.
When producing electrolytic capacitor of the present invention with the conveyer belt mode is a large amount of, because lead terminal 1 temporarily rests on the conveyer belt 22, can not make lead terminal 1 connect the binding agent that inserts picture said this spline structure in Fig. 6～Fig. 8 stoped in the body 20, so will implement this technology in the past in above-mentioned temporary transient stop.
Though such a technology is not to implement, because the part of shell packaging technology is sneaked in the part of aluminum foil coil winding technologe, just needs to change automated manufacturing system, thereby produce the problem in the process management.
Figure 10 is that explanation is suitable for adopting the binding agent of conveyer belt mode to stop the perspective view of the major part of body, (A) and (B) show the situation of different structure respectively for example.
When being implemented in conveyer belt mode illustrated in fig. 9, as shown in Figure 10, with binding agent stop body 24 be divided into two more effective.That is to say, in (A), are half ones 24 that is split to form by the line along the pair of holes 24A by inserting logical lead terminal 1 because binding agent stops body 24
1With half one 24
2Constitute, so, also can easily combine with lead terminal 1 even lead terminal 1 persisted on conveyer belt 22, enter the shell assembling procedure.
Yet, (A) binding agent shown in stops body 24 because just be divided into two simply, in the shell assembling procedure, attaching it under the state that capacitor main body 1 exposes on the lead terminal 1 is difficult, be necessary after capacitor main body 7 is put into shell 15, again binding agent to be stoped body 24 to install on the lead terminal 1, keep off around it with shell 15.
And stop in the body 24, though be divided into half one 24 along line by pair of holes 24A at the binding agent shown in (B)
1With half one 24
2The structure this point constant, but half one 24
1Be provided with to half one 24 of combination with it
2The 24B of wedge portion that direction is stretched out is provided with the key 24C that locatees usefulness, simultaneously correspondingly in half one 24
2On the groove 24D that can admit the 24B of wedge portion is set, be provided with simultaneously the location usefulness keyway 24E.
When being processed into the structure shown in (B), bond stops body 24 to be pressed into the assigned position of shell 15, with reduced 20～30 μ m of the shell 15 at assigned position place, can finish the crimping to lead terminal 1 simultaneously then.
In the present invention, be not limited to the various embodiments described above, can realize other many variations,, certainly lead terminal also is suitable for from the double-end form of capacitor respectively though for example in the various embodiments described above, only exemplify out the form that lead terminal is all drawn from an end of capacitor, if under the sort of situation, embodiment shown in the image pattern 2 is such, is when the structure of opening need be set, in order to draw lead terminal, when existing opening improper, certainly opening is moved on to suitable place.
Making according to the present invention in the method for electrolytic capacitor, coiling is bonded with the anode foils of lead terminal, the Cathode Foil that is bonded with lead terminal and spacer, form capacitor main body, making lead terminal connect insert seal or binding agent stops in the hole of body and is installed on the capacitor main body, stop the binding agent of body gas-tight seal to harden fully to major general's lead terminal and seal or binding agent to heat-treat, electrolyte is impregnated in the capacitor main body in order to make.
By adopting said structure, the sealing between the seal of lead terminal and rubber system is improved, thereby electrolyte can not spill.Owing to be in the sclerosis that does not have to carry out under the situation of electrolyte to stop the binding agent between the body in order to adhering and sealing lead-out wire terminal and seal or binding agent, so can be the good sclerosis of epoxy adhesive at high temperature embodiment, thereby improve its fluid tightness.And, since the capacitor main body liquid seal that will draw lead terminal be encapsulated in the shell after, can put heating iron simply and wait and seal
The opening of venting and injection used for electrolyte, thereby implement easily.
：1： 15D： 1A： 15E： 1B： 16： 2： 17： 3： 18： 4： 20： 5： 20A： 6： 20B： 7： 20C： 8： 21： 9： 22： 10： 23： 11： 24： 12： 241，242：13： 24A： 14： 24B： 15： 24C： 15A： 24D： 15B： 24E： 15C：。
Claims (11)
1.-and the manufacture method of kind of electrolytic capacitor, it is characterized in that comprising the steps:
Reel the anode foils of lead terminal bonding, the bonding Cathode Foil and the spacer of lead terminal, form capacitor main body;
Then, but form and be through on the aforementioned lead terminal, be installed to the aforementioned capacitor main body again, before aforementioned interting, near aforementioned apertures or its, impose binding agent along the seal in the hole of aforementioned lead terminal break-through having by elastomeric material;
Subsequently, heat-treat, above-mentioned binding agent is hardened fully, bonding above-mentioned lead terminal and above-mentioned seal;
Then, electrolyte is impregnated in the above-mentioned capacitor main body;
At last, insert the capacitor main body that above-mentioned seal is housed in the shell and seal.
2. the said electrolytic capacitor manufacture method of claim 1, it is characterized in that comprising making on the above-mentioned lead terminal that is applied with binding agent to connect to insert to make and have and to be inserted the seal in logical hole by above-mentioned lead end, and be installed to the step on the above-mentioned capacitor main body by elastomeric material.
3. the manufacture method of an electrolytic capacitor is characterized in that it comprises the steps:
Coiling is bonded with the anode foils of lead terminal, the Cathode Foil that is bonded with lead terminal and spacer, forms capacitor main body;
On above-mentioned lead terminal, insert to be connected with and to be inserted the binding agent prevention body in logical hole by above-mentioned lead terminal, and be installed on the above-mentioned capacitor main body;
Insert and have venting and inject the shell of the opening of used for electrolyte capacitor main body that above-mentioned binding agent stops body is housed, stop on body one side and apply binding agent in that above-mentioned binding agent is housed then with double as;
Heat-treat above-mentioned binding agent is hardened fully, the above-mentioned binding agent that bonds stops body and above-mentioned lead terminal, simultaneously capacitor main body is sealed in the shell;
Inject electrolyte from above-mentioned venting with the opening that double as injects used for electrolyte, make above-mentioned capacitor main body dipping electrolyte;
Sealing above-mentioned venting injects the opening of used for electrolyte and seals above-mentioned shell with double as.
4. the manufacture method of an electrolytic capacitor is characterized in that it comprises the steps:
Coiling be bonded with lead terminal anode foils, be stained with the cloudy paper tinsel and the spacer of leaded terminal, form capacitor main body;
Above-mentioned capacitor main body insertion had the opening of used for electrolyte is injected in venting with double as shell;
To there be the binding agent in the hole that can hold above-mentioned lead terminal to stop body to install on the above-mentioned lead terminal, it is combined with above-mentioned capacitor main body;
Binding agent is applied to being equipped with on the side that above-mentioned stick stops body in the above-mentioned shell;
Heat-treat above-mentioned binding agent is hardened fully, bonding above-mentioned binding agent stops body and above-mentioned lead terminal, simultaneously capacitor main body is sealed in the shell;
Inject electrolyte from above-mentioned venting with the opening that double as injects used for electrolyte, make above-mentioned capacitor main body dipping electrolyte;
Seal the opening of above-mentioned venting, seal above-mentioned shell with double as injection used for electrolyte.
5. the manufacture method of claim 3 or 4 said electrolytic capacitors is characterized in that cutting apart the binding agent resistance body along the line of the pair of holes by holding lead terminal.
6. the manufacture method of the said electrolytic capacitor of claim 5, it is characterized in that a plurality of capacitor main bodies of band lead terminal are contained on the conveyer belt by this lead terminal, use above-mentioned conveyer belt, transmit a plurality of capacitor main bodies on one side, Yi Bian carry out a plurality of manufacturing steps.
7. the manufacture method of the said electrolytic capacitor of each claim in the claim 3～6, it is characterized in that comprising stop body to insert in the shell binding agent after, with the part of the above-mentioned shell of heating iron heating conquassation, push down the step of above-mentioned binding agent resistance body.
8. the manufacture method of the said electrolytic capacitor of each claim in the claim 3～7, it is characterized in that comprising the sealing venting is injected the key intercalation of opening of used for electrolyte on above-mentioned opening, in the step of its front end and capacitor main body state of contact lower sealed outer housing with double as.
9. the manufacture method of the said electrolytic capacitor of each claim in the claim 3～8 is characterized in that comprising with the opening of heating iron sealing venting with double as injection used for electrolyte, the step of can.
10. the manufacture method of the electrolytic capacitor of claim 9 record is characterized in that, states heating iron in the use and seals after above-mentioned opening and the can, makes this heating iron cooling, takes off heating iron from above-mentioned shell then.
11. the said electrolytic capacitor manufacture method of each claim in the claim 3～10 is characterized in that it being the ageing that carried out above-mentioned capacitor main body before the above-mentioned opening of the above-mentioned electrolyte rear enclosed of dipping.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15325494 | 1994-07-05 | ||
| JP153254/94 | 1994-07-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1134030A true CN1134030A (en) | 1996-10-23 |
| CN1046818C CN1046818C (en) | 1999-11-24 |
Family
ID=15558443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95109452A Expired - Fee Related CN1046818C (en) | 1994-07-05 | 1995-07-05 | Method for making electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1046818C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307670C (en) * | 2001-07-07 | 2007-03-28 | 昭荣株式会社 | Manufacturing method of aluminium solid electrolytic condenser |
| CN107934436A (en) * | 2017-11-28 | 2018-04-20 | 广州智能装备研究院有限公司 | One kind reason material transport system |
| CN108183030A (en) * | 2017-12-25 | 2018-06-19 | 谢小坚 | A kind of high-precision capacitor structure and its manufacturing method |
| CN112164591A (en) * | 2020-10-09 | 2021-01-01 | 福建国光新业科技有限公司 | Manufacturing method for improving high-temperature high-humidity tolerance of laminated aluminum electrolytic capacitor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985000463A1 (en) * | 1983-07-05 | 1985-01-31 | Matsushita Electric Industrial Co., Ltd. | Aluminum electrolytic capacitor and method of manufacture thereof |
| EP0449145B1 (en) * | 1990-03-29 | 1998-01-28 | Matsushita Electric Industrial Co., Ltd. | Electric double layer capacitor and method for producing the same |
-
1995
- 1995-07-05 CN CN95109452A patent/CN1046818C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307670C (en) * | 2001-07-07 | 2007-03-28 | 昭荣株式会社 | Manufacturing method of aluminium solid electrolytic condenser |
| CN107934436A (en) * | 2017-11-28 | 2018-04-20 | 广州智能装备研究院有限公司 | One kind reason material transport system |
| CN107934436B (en) * | 2017-11-28 | 2019-06-25 | 广州智能装备研究院有限公司 | A kind of reason material transportation system |
| CN108183030A (en) * | 2017-12-25 | 2018-06-19 | 谢小坚 | A kind of high-precision capacitor structure and its manufacturing method |
| CN112164591A (en) * | 2020-10-09 | 2021-01-01 | 福建国光新业科技有限公司 | Manufacturing method for improving high-temperature high-humidity tolerance of laminated aluminum electrolytic capacitor |
| CN112164591B (en) * | 2020-10-09 | 2023-03-10 | 福建国光新业科技股份有限公司 | Manufacturing method for improving high-temperature high-humidity tolerance of laminated aluminum electrolytic capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1046818C (en) | 1999-11-24 |
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