CN1701402A - Capacitor and method of connecting the same - Google Patents
Capacitor and method of connecting the same Download PDFInfo
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- CN1701402A CN1701402A CN 200480001183 CN200480001183A CN1701402A CN 1701402 A CN1701402 A CN 1701402A CN 200480001183 CN200480001183 CN 200480001183 CN 200480001183 A CN200480001183 A CN 200480001183A CN 1701402 A CN1701402 A CN 1701402A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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Abstract
A large capacity capacitor of which driving electrolyte does not leak to the outside even when used in high-temperature, high-humidity conditions. A capacitor has a hollow capacitor element (1) constructed by rolling a pair of flat plate-like electrodes (2a, 2b) with a separator (4) in between, a bottomed tubular metallic case (5) for receiving the capacitor element (1) together with a driving electrolyte, and a sealing plate (7), with external connection terminals (8), for sealing the opening of the metallic case (5). A rubber-like elastic body (9) is provided on the peripheral edge of a surface of the sealing plate (7), an electric insulation layer (6) covering at least portion from an opening edge of the metallic case (5) to a recess (5b) for fixing the sealing plate (7) is provided, and the elastic body (9) is pressed at the opening edge portion of the metallic case (5).
Description
Technical field
The capacitor of the big electric capacity that the present invention relates in distinct electronic apparatuses, use and the method that is connected such capacitor.
Background technology
Proposed a kind of for example at the electrical double layer capacitor of the structure like this shown in Figure 18 and 19 capacitor as big electric capacity.As shown in figure 18, in this electrical double layer capacitor, capacitor element 31 is housed inside in the metal shell 36 with airtight bottom, and will drive after electrolyte injects this capacity cell 31, capacitor element 31 is placed in the airtight metal shell 36 in bottom, and by opening black box 37 its opening portions of sealing.The cover made from synthetic resin 38 covers the outside of metal shells 36.
As shown in figure 19, in capacitor element 31, each by be mixed together with stir the polarizable electrode 32a of sheet that activated carbon for example, carbon and polytetrafluoroethylene (PTFE) as adhesive form and 33a by electrically conducting adhesive respectively be fixed with the paper tinsel shape of drawing lead-in wire, sheet or netted metal current collector 32b and be connected with 33b, form electrode assemblie 32 and 33 thus, and this electrode assemblie is rolled volume to turning to by separator 34 and 35.
Circuit current-collector 32b and 33b do greatlyyer so that outstanding lead portion 32c and 33c to be provided respectively than polarizable electrode 32a of sheet and 33a on width, and in coiling operating period, these outstanding lead portion 32c are tilted to the center (by die forging) of capacitor element 31 to be provided for contacting face-to-face the wire surface of purpose with 33c.
Upper and lower surface about the capacitor element 31 that forms by die forging, keep lower surface 32c to contact, and keep upper surface 33c to contact with the surface, inside of the conducting end daughter board 39 that extends through opening black box 37 with the inner surface of the lower surface part 36a of metal shell 36.
Encapsulating method about opening black box 37, be formed for keeping the horizontal paddle-tumble of opening black box 37 at metal shell 36, and place after the opening black box 37 on this horizontal paddle-tumble, the open end portion of metal shell 36 curves inwardly, and the permanent opening black box 37 thus.In order further to strengthen sealing effectiveness, the open end portion of the bending of metal shell 36 is engaged in the rubber part 40 of the annular that opening black box 37 places provide.
As the prior art of the invention that relates to the application, known existence is JP-A-10-275751 for example.
But, in the big electric capacity capacitor of above tradition, the upper surface 33c of capacitor element 31 is as the anode tap surface, and its lower surface 32c is as the cathode leg surface, and lower surface 32c is electrically connected on the interior bottom surface 36a of metal shell 36, and therefore metal shell 36 is negative electrodes.
When in high temperature and high humidity environment, using this capacitor, can run into a problem, promptly owing to combine setting with interlock, so the driving electrolyte leaks to the outside along the inner surface of metal shell 36 as the open end portion of the metal shell 36 of negative electrode and the ring-shaped rubber part that provides at opening black box 37 places 40.
About this leakage, metal shell 36 is negative electrodes, and therefore partly locate to produce hydroxyl ion in its sealed opening owing to drive the electrochemical reaction of electrolytical moisture, and because the effect of hydroxyl ion and electrolytical cation, electrolyte meter reveals higher basicity.The driving electrolyte that shows alkaline characteristic moves the rubber part 40 that keeps in touch with open end portion to worsen along the inner surface of metal shell 36, has reduced sealing property thus.
On the other hand, exist a plurality of capacitors that are connected in series to improve the situation of withstand voltage properties.In this case, the metal shell of first capacitor is anodal, and second metal shell to last capacitor alternately is the positive and negative utmost point.
When this metal shell was positive pole, the electric current collector plate was a negative pole.Here, and when for example using the etamon borofluoride when driving electrolytical solute, the tetrafluoro boric acid anion that is anion in driving electrolyte is near the sealed opening part, and the reaction by (chemical equation 1) expression takes place, and produce hydrogen ion by reaction then, reveal acidic nature so that drive electrolyte meter by (chemical equation 2) expression.
(chemical equation 1)
(chemical equation 2)
This drives electrolytical acid constituents and moves along the inner surface of metal shell, and the rubber part that keeps in touch of deterioration and open end portion, so that reduce sealing property.
When the driving electrolyte so leaks to the outside, this situation not only causes the problem in shortening capatcitor life-span, and cause a problem, promptly when driving positive and negative that the mode of electrolyte with bridge joint be deposited on the wiring pattern of printed circuit board (PCB) and partly go up, has the fault that the ionic conduction characteristic is caused circuit owing to leak to the driving electrolyte of outside.
The present invention seeks the problem that solves above routine, and an object of the present invention is to provide the capacitor of big electric capacity, even wherein use capacitor for a long time in high temperature and high humidity environment, drives electrolyte and also can not leak to the outside.And the present invention also provides a kind of method that connects this capacitor.
Summary of the invention
In order to overcome the above problems, a kind of capacitor that the invention provides of claim 1 comprises: by rolling the hollow capacitor element that volume forms with separator setting a pair of plain film shape electrode therebetween; Hold the airtight metal shell of capacitor element and the electrolytical bottom of driving therein; With the opening sealing plate of the opening portion of sealing metal shell, the opening sealing plate has external connection terminals, wherein described opening sealing plate on the surface its peripheral peripheral edge portion the rubber-like elasticity assembly is provided; Most fix the recessed zone that described opening sealing plate provides with the electric insulation layer that on described metal shell, forms to cover at least, and compress described rubber-like elasticity assembly by the open end portion of described metal shell from the openend extension of described metal shell.Use this structure, can keep the opening sealing plate side surface closely contact with the inner surface of metal shell, and therefore driving electrolyte can not move along the inner surface of metal shell, and in addition pass through the sealed opening part of electric insulation layer insulated metal shell, and therefore can not drive the electrochemical reaction of electrolytical moisture content, and obtain between the long-term operating period, to improve the result of use of the reliability of sealing.
Be subordinated to the invention of the claim 2 of claim 1, relate to a kind of structure, wherein capacitor element has the lead-in wire of drawing that is connected to described electrode pair respectively, and an end surfaces of one of electrode protrudes in the opposite direction of the protrusion direction of drawing lead-in wire.Use this structure, the heat that in capacitor, produces at the charging and the interdischarge interval of capacitor can be easily electrode tip surface portion by the protrusion of capacitor element be distributed to metal shell, and therefore obtain easily loses heat to outside result of use.
Be subordinated to the invention of the claim 3 of claim 1, relate to a kind of structure, wherein the end surfaces of the electrode pair of capacitor element protrudes on relative direction respectively, and draws lead-in wire and partly be connected with the plane surface of the end surfaces of described electrode separately.Use this structure, reduced at capacitor element and drawn the contact resistance that produces between the lead-in wire, and the heat that produces in capacitor can partly be distributed to metal shell by the end surfaces of the protrusion by capacitor element easily, and therefore obtains easily loses heat to outside result of use.
Be subordinated to the invention of the claim 4 of claim 3, relate to a kind of structure, wherein drawing at two provides electrical insulating board between the lead-in wire.Use this structure, acquisition prevents in the short circuit and the result of use that obtains outstanding abilities such as anti-mechanical oscillation of drawing between the lead-in wire.
Be subordinated to the invention of the claim 5 of claim 1, relate to a kind of structure, wherein electric insulation layer is made by paraffin (olefin) resin of polyaminoamide (polyaminoamide) compound or modification.The paraffin resin of polyaminoamide compound and modification all produces the bonding force of strong metal, and it is stable for alkali and acid, and therefore restrained the deterioration of electric insulation layer, and in addition can restrain and comprise that elastomeric material worsens as the chemistry of the rubber-like elasticity assembly of main component, and therefore obtain between the long-term operating period, to improve the result of use of the reliability of sealing.
Be subordinated to the invention of the claim 6 of claim 1, relate to a kind of structure, wherein plain film shape electrode pair has the polarizable electrode layer that forms respectively on the surface of current collector, each current collector is made up of metal forming or conducting polymer, and polarizable electrode layer is made up of the mixture that comprises activated carbon, adhesive and conductive agent at least.Use this structure, this electric capacity can be used as the electrical double layer capacitor of utilization at the electrical bilayer of the interface of polarizable electrode layer formation, and obtain a kind of result of use, the needs that promptly can obtain to be used as automobile electricity equipment have the big electric capacity and reliably and with long-term the capacitor of device also.
Be subordinated to the invention of the claim 7 of claim 1, relate to a kind of structure, wherein plain film shape electrode pair one of at least in use metal forming with the metal oxide film that forms in its surface.Use this structure, when the metal material of electrode is for example during aluminium, this capacitor can be used as aluminium electrolytic capacitor, and the aluminium electrolytic capacitor that can be used as the inverter circuit that is mainly used in the high ripple current of needs, and obtain a kind of result of use, promptly compare with traditional aluminium electrolytic capacitor, this capacitor is reliably and with long-term, and reduced the heat that produces from product when using big electric current.
Be subordinated to the invention of the claim 8 of claim 1, relate to a kind of structure, wherein on the interior bottom surface of metal shell and opening sealing plate, be formed for respectively locating and/or the projection of the core of fixed capacitor element, loose structure is provided thus.Use this structure, when applying when vibration from the outside to capacitor, can reduce the end surfaces of capacitor element and the stress of the bound fraction between the metal shell, and therefore obtain a kind of result of use, even when promptly improving the vibration resistance ability of product and generation is hot in capacitor during use, can improve the ability that heat is distributed to the outside.
Be subordinated to the invention of the claim 9 of claim 1, relate to a kind of structure, the core assembly of hollow wherein is provided at the core of capacitor element.Use this structure, the core assembly of being made by the macromolecule that for example insulate is as the coiling core of coiling capacitor element, and therefore compare more closely coiling capacitor element on core assembly with the situation of not using such core assembly, and can shorten distance between electrodes, and therefore reduce the teeter of rolling volume, and also reduced internal resistance.And in addition,, and therefore obtain to improve the result of use of the vibration resistance ability of product even, can reduce the stress on the electrode tip surface of capacitor element when applying when vibration from the outside to capacitor.
In the situation that core assembly is made of metal, can improve the extremely outside ability of thermal transpiration that in capacitor, to produce during use.
Be subordinated to the invention of one of any claim 10 of claim 1 to 3, relate to a kind of structure, wherein to provide gradually thin thickened wall portions with the interior bottom surface of metal shell and the contact relation of inner surface.Use this structure, when the electrode tip surface of capacitor element was pressed on the interior bottom surface of metal shell, the electrode tip surface of capacitor element can easily be gathered on interior bottom surface that part of of the metal shell that is connected with the electrode tip surface electrical.Therefore, can be so that the connection changes in resistance that produces between capacitor element and metal shell be more stable, and obtain to reduce the result of use of the resistance variations of product.
Be subordinated to the invention of the claim 11 of claim 1, relate to a kind of structure, wherein protrude in relative direction respectively on the electrode tip surface of capacitor element, and one of electrode tip surface of capacitor element is electrically connected with the interior bottom surface of metal shell, and provide current collector plate, and the external connection terminals of current collector plate extends through the opening sealing plate with the external connection terminals that is connected with another electrode tip surface electrical of capacitor element.Use this structure, can keep the opening sealing plate side surface closely contact with the inner surface of metal shell, and therefore driving electrolyte can not move along the inner surface of metal shell, and the inboard of the sealed opening of electric insulation layer insulated metal shell part in addition, and therefore can not drive the electrochemical reaction of electrolytical moisture content.In addition, the heat that produces in capacitor at the charging and the interdischarge interval of capacitor can be distributed to metal shell by the electrode tip surface of the protrusion by capacitor element easily, feasible heat can easily be distributed to the outside, and therefore obtains can improve between the long-term operating period result of use of the reliability of sealing.
Be subordinated to the invention of the claim 12 of claim 11, relate to a kind of structure, wherein provide external connection terminals on the outer bottom surface of metal shell.When capacitor is joined together or when capacitor is introduced into device, obtains a kind of result of use, promptly reduced contact resistance and obtained the outstanding ability of anti-mechanical oscillation etc.
For example, external connection terminals has the column that wherein forms threaded portion, or has the writing board shape that forms installing hole at its core.
Be subordinated to the invention of the claim 13 of claim 11 or claim 12, relate to a kind of structure, the electric current collector plate that wherein has external connection terminals be made of metal and as the opening sealing plate opening sealling current collector plate.Use this structure, opening sealing plate and electric current collector plate are merged into integrative-structure, and have therefore obtained a kind of result of use, promptly can reduce the number of the part of capacitor, and can reduce the height of capacitor simultaneously.
Here, for example, external connection terminals has the column that forms threaded portion at its outer surface, or has the writing board shape that forms installing hole at its core.
Be subordinated to the invention of one of any claim 14 of claim 11 to 13, relate to a kind of structure, wherein on periphery edge part, form the projection of annular with the surface that contacts the opening sealing plate that is provided with or opening sealling current collector plate with the rubber-like elasticity assembly.Use this structure, realize sealing by this way, promptly between the open end portion of the bending of the projection of the annular that forms on the opening sealing plate and metal shell, keep the rubber-like elasticity assembly securely, and therefore obtain between the long-term operating period, to improve the result of use of the reliability of sealing.
Be subordinated to the invention of the claim 15 of claim 11 or claim 12, relate to a kind of structure, wherein contact with external connection terminals with the electric current collector plate opening sealing plate that is provided with provide black box in the throughhole portions.Use this structure, can seal for certain by its expose the electric current collector plate external connection terminals the opening sealing plate through hole, and the driving electrolyte that therefore obtains in metal shell can not leak to outside result of use.
Be subordinated to the invention of the claim 16 of claim 15, relate to a kind of structure, wherein keep with the opening sealing plate form electric insulation layer on that surface of external connection terminals of the electric current collector plate that contacts of throughhole portions.Use this structure, acquisition can further improve the result of use that invention obtained by claim 15.
Be subordinated to the invention of the claim 17 of claim 13, relate to a kind of structure, wherein the outer periphery in that side that is connected with capacitor element of opening sealling current collector plate partly forms the annular protrusion branch, and provides electric insulation layer comprising on the outer periphery part that annular protrusion divides.Use this structure, can obtain a kind of result of use, promptly restrain in the contiguous electrolytical acidifying of driving that takes place of the outer periphery of opening sealling current collector plate part and prevent that the chemistry of rubber-like elasticity assembly from worsening.
Outer periphery in that side that is connected with capacitor element of opening sealling current collector plate partly forms the annular protrusion branch, and use this structure, when being introduced at capacitor element that opening sealling current collector plate is pressed on the electrode tip surface of capacitor element after the metal shell, the electrode tip surface of capacitor element can easily be gathered on the opening sealling current collector plate that is connected with the electrode tip surface electrical that part of.Therefore, can be so that the connection changes in resistance that produces between capacitor element and opening sealling current collector plate be more stable, so that can restrain the resistance variations of product.
When this annular protrusion branch (to the center of capacitor element) with respect to the scope of angle between 5 ° and 85 ° of the outer periphery surface of capacitor element in the time, can realize its effect at the annular protrusion branch that opening sealling current collector plate provides.
Be subordinated to the invention of one of any claim 18 of claim 11 to 13, relate to a kind of structure, wherein be formed for locating and/or the projection of the core of fixed capacitor element at one of interior bottom surface, electric current collector plate and opening sealling current collector plate of metal shell at least.Use this structure, when applying when vibration from the outside to capacitor, can reduce the stress on the electrode tip surface of capacitor element, therefore and obtain a kind of result of use, can improve loses heat to outside ability when hot even promptly can improve the vibration resistance ability of product and in capacitor, produce during use.
Be subordinated to the invention of claim 11, one of any claim 19 of 16 and 17, relate to a kind of structure, wherein electric insulation layer is made by the paraffin resin of polyaminoamide compound or modification.The paraffin resin of polyaminoamide compound and modification all produces the bonding force of strong metal, and it is stable for alkali and acid, and therefore restrained the deterioration of electric insulation layer, and in addition can restrain and comprise that elastomeric material worsens as the chemistry of the rubber-like elasticity assembly of main component, and therefore obtain between the long-term operating period, to improve the result of use of the reliability of sealing.
Be subordinated to the invention of one of any claim 20 of claim 11 to 13, relate to a kind of structure, wherein plain film shape electrode pair has the polarizable electrode layer that forms respectively on the surface of current collector, each current collector is made up of metal forming or conducting polymer, and polarizable electrode layer is made up of the mixture that comprises activated carbon, adhesive and conductive agent at least.Use this structure, this electric capacity can be used as the electrical double layer capacitor of utilization at the electrical bilayer of the interface of polarizable electrode layer formation, and obtain a kind of result of use, the needs that promptly can obtain to be used as automobile electricity equipment have big electric capacity and at the long-time capacitor of device reliably.
Be subordinated to the invention of one of any claim 21 of claim 11 to 13, relate to a kind of structure, wherein plain film shape electrode pair uses one of at least the metal forming with the metal oxide film that forms in its surface.Use this structure, when the metal material of electrode is for example during aluminium, this capacitor can be used as aluminium electrolytic capacitor, and the aluminium electrolytic capacitor that can be used as the inverter circuit that is mainly used in the high ripple current of needs, and obtain a kind of result of use, promptly compare with traditional aluminium electrolytic capacitor, this capacitor but also has reduced the heat that produces from product when using big electric current reliably and with long-term.
Be subordinated to the invention of one of any claim 22 of claim 11 to 13, relate to a kind of structure, the core assembly of hollow wherein is provided at the core of capacitor element.Use this structure, the core assembly of being made by the macromolecule that for example insulate is as the coiling core of coiling capacitor element, and therefore compare more closely coiling capacitor element on core assembly with the situation of not using such core assembly, and can shorten distance between electrodes, and therefore reduce the teeter of rolling volume, and also reduced internal resistance.And in addition,, and therefore obtain to improve the result of use of the vibration resistance ability of product even, can reduce the stress on the electrode tip surface of capacitor element when applying when vibration from the outside to capacitor.
In the situation that core assembly is made of metal, can improve the extremely outside ability of thermal transpiration that in capacitor, to produce during use.
Be subordinated to the invention of one of any claim 23 of claim 11 to 13, relate to a kind of structure, wherein to provide gradually thin thickened wall portions with the interior bottom surface of metal shell and the contact relation of inner surface.Use this structure, when the electrode tip surface of capacitor element was pressed on the interior bottom surface of metal shell, the electrode tip surface of capacitor element can easily be gathered on interior bottom surface that part of of the metal shell that is connected with the electrode tip surface electrical.Therefore, can be so that the connection changes in resistance that produces between capacitor element and metal shell be more stable, and obtain to reduce the result of use of the resistance variations of product.
The invention of claim 24 relates to and connects a plurality of methods of attachment as the capacitor that claim 11 defined, it has used a kind of method of attachment, and wherein all capacitors link together by soldering (brazing) and/or joint welding (welding) at the outer bottom surface or the outer surface of their metal shells separately.Use this method,, can keep the reliability of the sealing property of each capacitor, and therefore can avoid driving electrolytical leakage even when being connected in series all capacitors.Therefore even when capacitor is applied mechanical pressure, can not rupture in the coupling part, and the cut-out that can not go between, and obtain to significantly improve the result of use of the efficient of attended operation.
When using inert gas arc welding,, can realize connecting with higher-strength owing to exist at the coupling part oxide-free that connects by metallic bond as joint welding.
After using soldering, realize inert gas arc welding, with both one of the situation comparison used separately, can more effectively connect.
The example of inert gas arc welding comprises TIG lap welding method and MIG lap welding method, and two methods all can be used in the present invention.
The invention that is subordinated to the claim 25 of claim 24 relates to a kind of method, wherein uses coupling assembling to realize connecting.By using coupling assembling, in a plane, realize connecting, and obtain to improve the result of use of the intensity of resisting mechanical stress.
Be subordinated to the invention of the claim 26 of claim 1 or claim 11, relate to a kind of structure, wherein electric insulation layer is made by propylene melamine (aryl-melamine) resin.Use this structure, obtain the high bond strength of electric insulation layer metal shell.For example, dissolving propylene melmac in the mixed solvent that comprises water, isopropyl alcohol (isopropylalcohol) and butyl cellosolve (butylcellosolve), and when the temperature of mixed solvent remains on 21 ± 2 ℃, immerse in mixed solvent near the open end portion of metal shell and its, and apply the voltage 2 to 5 minutes of 150 ± 50V with metal shell as a utmost point.By the practice like this, can form the electric insulation layer of firm engagement in metal shell, so that separated from one another at the interface of metal shell and electric insulation layer can not taken place in long-time, even and therefore obtained can improve the result of use of the reliability of sealing between the long-term operating period.
Be subordinated to the invention of claim 1,5,11,16,17,19,26 one of any claims 27, relate to a kind of structure, wherein, metal shell is applied at least one oil removing (degreasing) processing, surface roughening (surfaceroughening) processing and oxide-film form processing as the preliminary treatment that is used on metal shell, providing electric insulation layer.Use this structure, when carrying out above all processing one of any, obtain the high bond strength between metal shell and electric insulation layer.For example, when not applying oil removal treatment, between metal shell and resin, may form oil film, and after product is produced,, metal shell and resin take place easily at the interface from separated from one another when driving that oil that electrolyte causes oil film flows into or when flowing out product.Therefore, be necessary to remove oil film by oil removal treatment.When metal shell being applied surface roughening and handle, make the rough surface of metal shell, so that electric insulation layer is because grappling (anchor) effect is not easy to separate from metal shell.In order to realize that oxidation film form to handle, metal shell is made by aluminum, and open end portion and its contiguous sulfuric acid solution and fluid temperature that is dipped into l6 ± 1W/V% remain on 21 ± 2 ℃, and at l10 ± 40A/m
2Current density apply about 40 minutes of the voltage of 15 ± 3V.By the practice like this, can form the porous metal oxide film of honeycomb structure.This oxidation film is a porous, and therefore electric insulation layer is not easy to separate from metal shell owing to the grappling effect.When use modification wherein when an end of macromolecular chain forms the polypropylene (polypropylene) of hydroxyl groups, because the hydrogen bonding between the oxygen of hydroxyl groups and metal oxide film can obtain the more electric insulation layer of firm engagement, even and therefore obtain between the long-term operating period, to improve the result of use of the reliability of sealing.
Be subordinated to the invention of the claim 28 of claim l or claim 11, relate to a kind of structure, wherein electric insulation layer is anodized aluminium lamination.Use this structure, at opening portion and its contiguous electric insulation layer that provides of metal shell.For example, metal shell is made by aluminum, and contiguous sulfuric acid solution and the fluid temperature that is dipped into 14 ± 1W/V% of open end portion and its remain on 21 ± 2 ℃, and at 110 ± 40A/m
2Current density apply about 40 minutes of the voltage of 15 ± 3V, with metal shell as anode.By the practice like this, can form anodized aluminium lamination.But, this anodized aluminium lamination has defect part, and for the seal defect part, that part of aqueous solution that is dipped into the additive of the nickel acetate that for example comprises 5.5 ± 0.5g/L and 1.5 ± 0.5g/L that has thereon the anodized aluminium lamination that forms, and kept 10 to 20 minutes in the temperature that are being not less than 90 degree.By the practice like this, the seal defect part, and therefore can provide anodized aluminium lamination in open end portion and its vicinity of metal shell with defect part, promptly, therefore electric insulation layer is even and obtain to improve the result of use of the reliability of sealing between the long-term operating period.
Be subordinated to the invention of the claim 29 of claim 1 or claim 11, relate to a kind of structure, wherein the open end portion of metal shell forms crooked shape.Use this structure, the open end portion of metal shell has crooked shape, and does not have the marginal portion, even and therefore can guarantee the adequate thickness of electric insulation layer in open end portion.And in addition, by the rubber-like elasticity assembly being pressed on the open end portion sealed open of metal shell, and the open end portion at metal shell has under the situation of marginal portion, wait in bending operation when contacting when rolling volume with the open end portion of metal shell, part is removed electric insulation layer, and loses alkali supression effect in the part of this removal.For example, when when manufacturing process drive electrolyte deposition is on the removed part of electric insulation layer, drive that electrolyte is alkalized or acidifying to have promoted the deterioration of rubber-like elasticity assembly, because metal shell has polarity.In order to restrain this effect, the open end portion of bending metals shell, therefore even and during crooked this open end portion, contact with the open end portion of metal shell when rolling volume etc., therefore can restrain generation, and obtain to improve the result of use of the reliability of sealing at the defect part of electric insulation layer.
Description of drawings
Fig. 1 is the profile of structure that shows first embodiment of electric capacity of the present invention;
Fig. 2 is the perspective view of the expansion of its capacitor element;
Fig. 3 is the profile of structure that shows another metal shell of first embodiment;
Fig. 4 is the profile of another outside elongated end structure partly of first embodiment;
Fig. 5 is the profile of structure that shows second embodiment of capacitor of the present invention;
Fig. 6 (a) is the expansion perspective view of its capacitor element, and Fig. 6 (b) is its perspective view;
Fig. 7 is the profile of structure that shows the 3rd embodiment of capacitor of the present invention;
Fig. 8 is the perspective view of structure that shows the electrical insulating board of the 3rd embodiment;
Fig. 9 is the profile of structure of the 4th embodiment of capacitor of the present invention;
Figure 10 (a) is the expansion perspective view of its capacitor element, and Figure 10 (b) is its perspective view;
Figure 11 is the perspective view that shows the electric current collector plate of the 4th embodiment;
Figure 12 is the profile of structure that shows the 5th embodiment of capacitor of the present invention;
Figure 13 is the profile of structure that shows the 6th embodiment of capacitor of the present invention;
Figure 14 is the profile of structure that shows the 7th embodiment of capacitor of the present invention;
Figure 15 is the profile of structure that shows the 8th embodiment of capacitor of the present invention;
Figure 16 is the side front view that connects the method for capacitor according to the demonstration of the 9th embodiment of capacitor of the present invention;
Figure 17 is the side front view that connects the method for capacitor according to the demonstration of the tenth embodiment of the present invention;
Figure 18 is the profile that shows the structure of traditional capacitor; With
Figure 19 is the perspective view of the capacitor element that uses in above capacitor.
In the accompanying drawings, Reference numeral 101 indication capacitor elements, Reference numeral 102a and 102b indicator electrode are right, Reference numeral 102c indicator electrode end surfaces, lead-in wire is drawn in Reference numeral 103a and 103b indication, Reference numeral 104 indication separators, Reference numeral 105 indication metal shells, Reference numeral 105a indicates positioning convex, Reference numeral 105b indication is recessed, Reference numeral 106 indication electric insulation layers, Reference numeral 107 indication opening sealing plates, the annular protrusion that Reference numeral 107a indication forms on the opening sealing plate, Reference numeral 107b indicates positioning convex, Reference numeral 108 indication external connection terminals, Reference numeral 109 indication rubber-like elasticity assemblies, Reference numeral 201 indication capacitor elements, Reference numeral 202 indicator current collector plates, the projection of Reference numeral 202a indication on the electric current collector plate, the recessed portion of Reference numeral 202b indication in the electric current collector plate, the bossing of Reference numeral 202c indication on the electric current collector plate, Reference numeral 203 indication metal shells, projection on the interior bottom surface of Reference numeral 203a indication metal shell, projection on the interior bottom surface of Reference numeral 203b indication metal shell, recessed portion in the Reference numeral 203c indication metal shell, Reference numeral 204 indication electric insulation layers, Reference numeral 205 indication opening sealing plates, Reference numeral 205a indication the opening sealing plate the projection that forms on the surface, Reference numeral 205b indicating pass through hole, Reference numeral 206 indication rubber-like elasticity assemblies, Reference numeral 207 indicating sealing assemblies, and Reference numeral 208a and 208b indicator electrode end surfaces.
Embodiment
Embodiments of the invention will be described with reference to the drawings.
(first embodiment)
Fig. 1 is the profile of structure that shows first embodiment of capacitor of the present invention, and Fig. 2 is the perspective view of the expansion of the capacitor element that uses in this capacitor.In Fig. 1, Reference numeral 101 indication capacitor elements, and as shown in Figure 2, draw lead-in wire 103a and 103b and pair of electrodes 102a and 102b by connecting respectively, and these electrodes of mode coiling that protrude by an end surfaces 102c who is arranged at separator 4 therebetween with an electrode 102b then become to roll and roll up this capacitor element 101 of acquisition.Form the polarizable electrode that each is made up of the mixture that comprises activated carbon, adhesive and conductive agent at least respectively at electrode pair 102a and 102b.
On the interior bottom surface of metal shell 105, be formed for locating the protruding 105a of capacitor element 101.
In the capacitor of this first embodiment, can keep the side surface of opening sealing plate 107 closely to contact with the inner surface of metal shell 105, and therefore driving electrolyte can not move along the inner surface of metal shell 105, even and in addition when metal shell 105 is negative electrode, owing to insulate in the inboard of sealed opening part, can not drive the electrochemical reaction of electrolytical moisture content, and therefore can between the long-term operating period, improve the reliability of sealing.
And in addition, on the interior bottom surface of metal shell 105 and opening sealing plate 107, form protruding 105a and 107b respectively, and realize the location of capacitor element 101 and/or fixing by these protruding 105a and 107b, therefore even and when applying when vibrating from the outside to capacitor, can reduce the stress of capacitor element 101, and therefore can improve the vibration resistance ability of product, even and in capacitor, produce during use when hot, loses heat can be improved to outside ability.
On the other hand, when a kind of structure is provided, wherein metal shell 105 does not provide electric insulation layer 106, because metal shell 105 is negative electrodes, so the result as the electrochemical reaction that drives electrolytical moisture content partly produces hydroxyl ion at the sealed open of metal shell 105, and because the effect of hydroxyl ion and electrolytical cation, electrolyte shows higher alkalescence.The driving electrolyte of performance alkali characteristic moves to worsen the rubber-like elasticity element 106 that maintenance contacts with open end portion along the inner surface of metal shell 105, has therefore reduced sealing property.
In the capacitor of this first embodiment, electrode pair 102a and 102b have polarizable electrode respectively, therefore and this capacitor can be used as the electrical double layer capacitor of utilization at the electrical bilayer that forms at the interface of polarizable electrode, and this electrical double layer capacitor can be used as the big electric capacity of needs and at the device of the electric equipment of long-time reliable automobile.
Be used as one of the plain film shape electrode 102a of capacitor element 101 and 102b as anode by having the electrode foil of forming in the metal forming of its metal oxide film of forming of surface, and the metal forming of surface roughening is used as another electrode as negative electrode, and metal foil material is in the situation of aluminium, then this capacitor can be used as aluminium electrolytic capacitor, and can be mainly used in the inverter circuit that needs high ripple current, and compare with the conventional aluminum electrolytic capacitor, this capacitor is reliable at longer-term, and has also reduced the heat that produces from product when using big electric current.
As shown in Figure 3, the wall part 110 of gradually thin thickening is provided by the zone in inner surface that comprises metal shell 105 and interior bottom surface, the end surfaces of capacitor element 101 can easily enter coherent condition, and therefore the connection changes in resistance that between capacitor element 101 and metal shell 105, produces can be reduced to low-level so that can obtain stable capacitor.
Above gradually thin (to the center of interior bottom surface) is with respect to the scope of angle between 5 ° and 85 ° of the inner surface of metal shell 105.
By insulating resin layer 108a and 108b are provided, can stop the moisture that is tending towards invading capacitor fully, so that can obtain the capacitor of long-life and high reliability on the periphery of every pair of external connection terminals 108.
Though provide insulating resin layer 108a and 108b around every pair of external connection terminals 108, one of insulating resin layer can be provided.
(second embodiment)
Fig. 5 is the profile of structure that shows second embodiment of capacitor of the present invention, and Fig. 6 (a) and Fig. 6 (b) are respectively the perspective view and the perspective view of the expansion of the capacitor element that uses in this capacitor.In Fig. 5, Reference numeral 111 indication capacitor elements, and in this capacitor element 111, form polarizable electrode layer 113a and 113b that each is made up of the mixture that comprises activated carbon, adhesive and conductive agent at least in such a way, the electrode tip surface 112a that is electrode pair 112 protrudes respectively in relative direction with 112b, shown in Fig. 6 (a).Electrode pair 112 by turn to separator 114 settings therebetween roll volume, and, can obtain the capacitor element 111 shown in Fig. 6 (b) by the practice like this.
In the capacitor of this second embodiment, the inner surface that can keep the tight contacting metal shell 116 of side surface of opening sealing plate 117, and therefore driving electrolyte can not move along the inner surface of metal shell 116, and in addition owing to insulating in the sealed opening inboard partly of metal shell 116, can not drive the electrochemical reaction of electrolytical moisture content, and therefore can improve the reliability that between the long-term operating period, seals.
And in addition, on the interior bottom surface of metal shell 105 and opening sealing plate 117, form protruding 116a and 117b respectively, and realize the location of capacitor element 111 and/or fixing by these protruding 116a and 117b, therefore even and when from the outside capacitor being applied vibration, can reduce the stress of capacitor element 111, and therefore can improve the ability of the vibration resistance of product, even and in capacitor, produce during use when hot, loses heat can be improved to outside ability.
On the other hand, when a kind of structure is provided, wherein metal shell 116 does not provide electric insulation layer 118, because metal shell 116 is negative electrodes, so the result as the electrochemical reaction that drives electrolytical moisture content partly produces hydroxyl ion at the sealed open of metal shell 116, and because the effect of hydroxyl ion and electrolytical cation, electrolyte shows higher alkalescence.The driving electrolyte of performance alkali characteristic moves to worsen the rubber-like elasticity element 120 that maintenance contacts with open end portion along the inner surface of metal shell 116, has therefore reduced sealing property.
In addition, do not roll the volume capacitor element when not needing to control the position of drawing lead-in wire 103a and 103b,, and therefore can improve the efficient of this operation significantly as the capacitor 101 of first embodiment.
Connect respectively and draw lead-in wire 115a and 115b and comprise metallization, joint welding, soldering and use the bonding of electrically conducting adhesive to the example of the method for the upper and lower plane surface part of electrode tip surface 112a and 112b.
This capacitor can be as electrical double layer capacitor and as the aluminium electrolytic capacitor described above of first embodiment.
(the 3rd embodiment)
Fig. 7 is the cutaway view of structure that shows the 3rd embodiment of capacitor of the present invention, and this embodiment is structurally similar in appearance to second embodiment, except providing the electrical insulating board 121 drawing between lead-in wire 115a and the 115b of second embodiment.
Use this structure, prevented since mechanical oscillation cause in the short circuit of drawing between lead-in wire 115a and the 115b, so that can obtain the capacitor of excellent insulation property.
As shown in Figure 8, the core of this electrical insulating board is passed in the hole 122 that is formed for the passage that the protruding 117b of opening coffer 117 therefrom passes through, and also forms and pass electrical insulating board and be used for importing and drive electrolytical intercommunicating pore 123.By the practice like this, capacitor element 111 can be fixed more for certain, and can also fixedly draw lead-in wire 115a and 115b.
By the surface of drawing lead-in wire 115b is applied insulating tape to cover this surface, can make insulation more sure.
(the 4th embodiment)
Fig. 9 is the profile of structure that shows the 4th embodiment of capacitor of the present invention, and Figure 10 (a) and Figure 10 (b) are respectively the perspective view and the perspective view of the expansion of the capacitor element that uses in this capacitor, and Figure 11 is the perspective view of the electric current collector plate that uses in this capacitor.In Fig. 9, Reference numeral 201 indication capacitor elements, and Reference numeral 202 indications have the electric current collector plate of the external connection terminals that is electrically connected with the electrode tip surface 208a of capacitor element 201.As shown in figure 11, this electric current collector plate 202 comprises the bossing 202c that is used for easily therefrom passing through to drive electrolytical recessed portion 202b and is electrically connected on the electrode tip surface 208a of capacitor element 201.On this electric current collector plate 202, also be formed for locating the protruding 202a (see figure 9) of capacitor element 201.
Reference numeral 204 indication covers at least from the openend of metal shell 203 and extends to the electric insulation layer that is used for fixing the recessed zone that opening sealing plate 205 provided.The opening sealing plate of the opening of Reference numeral 205 indicating sealing metal shells 203, and this opening sealing plate 205 is included in annular protrusion 205a that its peripheral marginal portion forms on its outer surface and the through hole 205b that passes formation from its core.The rubber-like elasticity assembly that Reference numeral 206 indications provide at opening sealing plate 205 places, and the black box that provides in the through hole of Reference numeral 207 indications in opening sealing plate 205.
In capacitor element 201, form polarizable electrode layer 209a and 209b that each is made up of the mixture that comprises activated carbon, adhesive and conductive agent at least in such a way, the electrode tip surface 208a that is electrode pair 208 protrudes respectively in relative direction with 208b, shown in Figure 10 (a) and 10 (b).Electrode pair 208 by turn to separator 210 settings therebetween roll volume, and, can obtain the capacitor element 201 shown in Figure 10 (b) by the practice like this.
The bossing 202c of electric current collector plate keeps the electrode tip surface 208a against capacitor element 201, so that electrode tip surface 208a partly sink, and on the direction of capacitor element 201, the part of sinking is applied laser beam to connect electric current collector plate 202 and electrode tip surface 208a from opening sealing plate 205, and, can realize for certain connecting by the practice like this.
Similarly, the bossing 203b on the interior bottom surface of metal shell 203 keeps the electrode tip surface 208b against capacitor element 201, so that electrode tip surface 208b partly sink.
In the capacitor of this 4th embodiment, the inner surface that keeps the tight contacting metal shell 203 of side surface of opening sealing plate 205, and therefore driving electrolyte can not move along the inner surface of metal shell 203, even and in addition when metal shell 203 is negative electrode, because the inboard of sealed opening part is the electrochemical reaction that can not drive electrolytical moisture content of insulation, and therefore can improve the reliability of the sealing between the long-term operating period.
And in addition, on the interior bottom surface of electric current collector plate 202 and metal shell 203, form protruding 202a and 203a respectively, and realize the location of capacitor element 201 and/or fixing by these protruding 202a and 203a, therefore even and when from the outside capacitor being applied vibration, can reduce the electrode tip surface 208a of capacitor element 201 and the stress of 208b, and therefore can improve the ability of the vibration resistance of product, even and in capacitor, produce during use when hot, can improve loses heat to outside ability.
On the other hand, when a kind of structure is provided, wherein metal shell 203 does not provide electric insulation layer 204, because metal shell 203 is negative electrodes, so the result as the electrochemical reaction that drives electrolytical moisture content partly produces hydroxyl ion at the sealed open of metal shell 203, and because the effect of hydroxyl ion and electrolytical cation, electrolyte shows higher alkalescence.The driving electrolyte of performance alkali characteristic moves to worsen the rubber-like elasticity element 206 that maintenance contacts with open end portion along the inner surface of metal shell 203, has therefore reduced sealing property.
In Fig. 9, connect the bonding that electric current collector plate 202 and electrode tip surface 208a and the example of the method for interior bottom surface that is connected metal shell 203 and the surperficial 208b of electrode tip comprise metallization, joint welding, soldering and use electrically conducting adhesive.
In the situation of the Laser Welding in using lap welding method, connecting realizing from electric current collector plate 202 illuminating laser beam on the direction of electrode tip surface 208a, and connecting realizing at illuminating laser beam on the direction of electrode tip surface, the lateral 208b of the bottom of metal shell 203.In this case, when in order to improve the absorption of laser beam, when the opposite applies the surface treatment of for example chemical corrosion to the outer surface of the bottom of this surface of the electric current collector plate 202 of opening sealing plate 205 and metal shell 203, can improve the absorption of laser beam, and therefore can be with low-yield realization welding, and shortened the time of laser beam irradiation, so that can boost productivity.
The capacitor of this 4th embodiment can be used as the electrical double layer capacitor of utilization at the electrical bilayer that forms at the interface of polarizable electrode layer 209a and 209b, and this electrical double layer capacitor can be used as and need have big electric capacity and at the device of the electric equipment of long-time automobile reliably.
Be used as one of the plain film shape electrode pair 208a of capacitor element 201 as anode by having the electrode foil of forming in the metal forming of its metal oxide film of forming of surface, and the metal forming of surface roughening is used as another electrode as negative electrode, and metal foil material is in the situation of aluminium, then this capacitor can be used as aluminium electrolytic capacitor, and can be mainly used in the inverter circuit that needs high ripple current, and compare with the conventional aluminum electrolytic capacitor, this capacitor is reliable at longer-term, and has also reduced the heat that produces from product when using big electric current.
(the 5th embodiment)
Figure 12 is the profile of structure that shows the 5th embodiment of capacitor of the present invention, and this embodiment is structurally similar in appearance to the 4th embodiment, except the external connection terminals 211 that the outer bottom surface of the metal shell 203 of the 4th embodiment provides.
Use this structure, capacitor can easily and for certain link together.
For example, external connection terminals 211 has the column that forms threaded portion at its outer surface, or has the writing board shape that the heart therein partly forms installing hole.And select suitable one according to the condition that product uses.
(the 6th embodiment)
Figure 13 is the profile of structure that shows the 6th embodiment of capacitor of the present invention, and this embodiment is structurally similar in appearance to the 5th embodiment, except with the opening sealing plate 205 of the 5th embodiment in external connection terminals that part of of the electric current collector plate 202 that keeps in touch of throughhole portions 205 on form the electric insulation layer 213.
Here, imagination is an anode surface in the face of this electrode tip surface of the capacitor element 201 of electric current collector plate 202, and the other end surface of capacitor element 201 is cathode surfaces, and when for example etamon borofluoride is used as the electrolytical solute of driving, the tetrafluoro boric acid anion that is anion in driving electrolyte is near the electric current collector plate 202 as anode, and the reaction by above (chemical equation 1) expression takes place, and the reaction by above (chemical equation 2) expression produces hydrogen ion then, shows sour characteristic so that drive electrolyte.
As shown in figure 13, on the external connection terminals of electric current collector plate 202, form electric insulation layer 213, and by the practice like this, prevent to drive electrolytical acid constituents and move, worsen so that the black box 207 that provides in the through hole in opening sealing plate 205 is provided along the surface of external connection terminals.And in addition, prevent the hydrionic generation of aquation in the vicinity of this part, and therefore supression comprises that elastomeric material worsens as the chemistry of the black box 207 of key component, obtain between the long-term operating period, to improve the advantage of the reliability that seals thus.
(the 7th embodiment)
Figure 14 is the profile of structure that shows the 7th embodiment of capacitor of the present invention, and be substituted in electric current collector plate 202 and opening sealing plate 205 among the 5th embodiment, use as electric current collector plate and opening sealing plate opening sealling current collector plate 212, and also use the core assembly 215 of hollow at the core segment of capacitor element 201.
Thereby opening sealling current collector plate 212 comprises and is used to locate and the protruding 212a of fixed capacitor element 201, the annular portions 212b that is connected to capacitor element 201 that forms on the marginal portion of the outer periphery of its this side and the electric insulation layer (not shown) that provides around this bossing.
For opening with opening sealling current collector plate 212 sealing metal shells 203, this opening sealling current collector plate 212 is installed in opening, the marginal portion that utilizes the rubber- like elasticity assembly 213 and 214 of L shaped section to grip the outer periphery of this plate, sealed open thus.
Closely coiling on the core assembly 215 of the hollow that electrode pair and separator can provide in the core office of capacitor element 201, and reduced and rolled the traversing of volume, so that can shorten distance between electrodes, and therefore can reduce the internal resistance of capacitor.
And in addition,, can reduce the stress on the electrode tip surface of capacitor element 201, so that can improve the vibration resistance ability of product even apply when vibration from the outside to capacitor.
Metal can be used for hollow core assembly 215, and in this case, its metal part is divided and kept contact openings sealling current collector plate 212 or metal shell 203.In this case, even in use produce in capacitor when hot, this heat can be dissipated into the outside by opening sealling current collector plate 212 or metal shell 203.
In the capacitor of this 7th embodiment, opening sealling current collector plate 212 is as opening sealing plate 205 and the electric current collector plate 202 of the 5th embodiment, and therefore forms and pass the through hole of sealing plate 205, so that can improve the reliability of sealing.And in addition, can reduce height in large quantities, and also can reduce the number of components.
(the 8th embodiment)
Figure 15 is the profile of structure that shows the 8th embodiment of capacitor of the present invention, and in this capacitor, the metal shell 203 that forms the 7th embodiment is different shapes with opening sealling current collector plate 212.In the figure, Reference numeral 216 indications have the opening sealling current collector plate of the external connection terminals of the electrode tip surface 208a that is electrically connected on capacitor element 201, the annular portions that Reference numeral 216a indication forms on the part of the outer periphery of this side of the opening sealling current collector plate 216 that is connected to capacitor element 201, Reference numeral 216b indication is for being recessed into that the purpose of fixing this plate 216 forms in the side surface of opening sealling current collector plate 216, and Reference numeral 217 is indicated the electric insulation layer of the annular portions formation that forms on the part of the outer periphery that is centered around opening sealling current collector plate 216.
Reference numeral 218 indication metal shells, and on the interior bottom surface of this metal shell 218, form gradually thin thickened wall portions 218a, and more specifically in the zone of inner surface that comprises metal shell 218 and interior bottom surface.Above gradually thin (to the center of interior bottom surface) is with respect to the scope of angle between 5 ° and 85 ° of the inner surface of metal shell 218.
In the capacitor of this 8th embodiment, can strengthen sealing more, and can obtain reliable capacitor between the long-term operating period by opening sealling current collector plate 216.
And in addition, annular portions 216a that forms by part and the gradually thin thickened wall portions 218a that forms in the location of inner surface that comprises metal shell 218 and interior bottom surface at the outer periphery of opening sealling current collector plate 216, can easily make the electrode of opposite end surfaces of capacitor element 201 reach coherent condition, and it is extremely low-level therefore can be reduced in the connection changes in resistance that produces between capacitor element 201 and the metal shell 218, so that can obtain stable capacitor.
(the 9th embodiment)
Figure 16 is the side front view that connects the method for capacitor according to the demonstration of the ninth embodiment of the present invention.
In the figure, Reference numeral 221 and 222 is indicated capacitor body respectively, and Reference numeral 221a and 222a indicate the external connection terminals of capacitor 221 and 222 respectively, and Reference numeral 223 indication soldering part or joint welding parts.
In the method for this capacitor that is connected in series, driving electrolyte can not leak from each capacitor 221 and 222, and in addition capacitor body 221 and 222 can easily partly link together by soldering part or joint welding, and therefore can improve the efficient of attended operation significantly.
In method for welding, at the silver coating of the part coated with conductive of the side surface of metal shell, and the silver coating that then capacitor is used in the coating that keeps between their metal shell is fixed together.
For lap welding method, realize connection between the metal shell by the friction stir bonding, wherein, realize thus connecting by the frictional heat softener material that produces between metal shell and the instrument and simultaneously by rotating this instrument composite material.
Different with traditional arc-welding and Laser Welding, this friction stir bonding can obtain firm bonding under the situation of molten materials not, and the distortion after therefore connecting and distort little, and it is little in addition to connect defective, and therefore in metal shell, can not produce defect part, so that the driving electrolyte in capacitor can not leak.
(the tenth embodiment)
Figure 17 is the side front view that connects the method for capacitor according to the demonstration of the tenth embodiment of the present invention.In the figure, Reference numeral 224 and 225 is indicated capacitor body respectively, and Reference numeral 226 indication coupling assemblings.
In the capacitor method of attachment of this tenth embodiment, the plane surface of capacitor body 224 and 225 flat bottoms surface and coupling assembling 226 overlaps, and to soldering each other, so that can guarantee wide join domain.Therefore, the electrical resistance of coupling part is low, and when using big electric current and using capacitor, can restrain the generation in connecting portion office heat.
Overlap on the flat bottoms surface of capacitor body 224 and 225 and the plane surface of coupling assembling 226, and apply in the inert gas arc welding situation thereunto, by metallic bond these surfaces are linked together, even and therefore when capacitor connected in series is applied mechanical stress, can not rupture in the coupling part, and the cut-out of lead can not take place.And in addition, oxide-free exists in the coupling part that links together by metallic bond, and therefore obtains to reduce the effect of degeneration of the electrical resistance of coupling assembling 226.
(industrial applicibility)
As mentioned above, capacitor of the present invention comprises: by rolling the hollow capacitor element that volume forms with separator setting plain film shape electrode pair therebetween; Hold the opening sealing plate of the opening portion of airtight metal shell in capacitor element and the electrolytical bottom of driving wherein and sealing metal shell, the opening sealing plate has external connection terminals; And the opening sealing plate provide the rubber-like elasticity assembly in its peripheral marginal portion on the surface; With cover from the openend of metal shell extend to be provided for the permanent opening sealing plate the electric insulation layer in recessed zone, and the electrical assembly of open end dividing potential drop rubber-like by metal shell.Use this structure, can keep the opening sealing plate the inner surface of the tight contacting metal shell of side surface, and therefore driving electrolyte can not move along the inner surface of metal shell, and in addition insulated by electric insulation layer in the inboard of the sealed opening of metal shell part, and therefore can not drive the electrochemical reaction of electrolytical moisture content, and therefore obtain between the long-time operating period, to improve the advantage of the reliability of sealing.
And in addition, the heat that in capacitor, produces at the charging and the interdischarge interval of capacitor can be easily end surfaces by the protrusion of capacitor element partly be distributed to metal shell, and therefore obtain easily loses heat to outside advantage.
Capacitor of the present invention comprises: by rolling the hollow capacitor element that volume forms with separator setting plain film shape electrode pair therebetween, promptly the end surfaces of electrode protrudes respectively in relative direction in so a kind of mode; With hold capacitor element and drive the airtight metal shell in electrolytical bottom, and one of the electrode tip surface of capacitor element is electrically connected with its interior bottom surface; With electric current collector plate with the external connection terminals that is connected with another electrode tip surface electrical of capacitor element; The opening sealing plate of the opening portion of sealing metal shell in such a way, the external connection terminals that is the electric current collector plate passes the extension of opening sealing plate, and on the inner surface of metal shell, form electric insulation layer and be used for fixing the recessed zone that the opening sealing plate provides, and compress the rubber-like elasticity assembly by the open end portion of metal shell to cover at least to extend to from the openend of metal shell.Use this structure, the inner surface of the metal shell of insulation in the vicinity of the opening portion of metal shell, and in the vicinity of opening portion, do not show alkalescence, and restrained the chemistry deterioration of rubber-like elasticity assembly, and can improve the reliability that seals between the long-term operating period.
And in addition, the heat that in capacitor, produces at the charging and the interdischarge interval of capacitor can be easily end surfaces by the protrusion of capacitor element partly be distributed to metal shell, and therefore obtain easily loses heat to outside advantage.
Though describe the present invention in detail by specific embodiment, yet can under the situation that does not deviate from the spirit and scope of the present invention, apply different changes and retouch apparent to one skilled in the art.
The present invention is based in the Japanese Patent ApplicationNo.2003-075675 (Japanese patent application 2003-075675 number) of application on March 19th, 2003 and its content of Japanese Patent Application No.2003-075677 (Japanese patent application 2003-075677 number) of applying for and be incorporated herein by reference on March 19th, 2003.
Claims (29)
1. a capacitor comprises: by rolling the hollow capacitor element that volume forms with separator setting a pair of plain film shape electrode therebetween; Hold the airtight metal shell of described capacitor element and the electrolytical bottom of driving therein; With the opening sealing plate of opening portion of the described metal shell of sealing, described opening sealing plate has external connection terminals, wherein described opening sealing plate provide the rubber-like elasticity assembly in its peripheral marginal portion on the surface; Most fix the recessed zone that described opening sealing plate provides with the electric insulation layer that on described metal shell, forms to cover at least, and compress described rubber-like elasticity assembly by the described open end portion of described metal shell from the described openend extension of described metal shell.
2. capacitor as claimed in claim 1, wherein said capacitor element have the lead-in wire of drawing that is connected to described electrode pair respectively, and an end surfaces of one protrudes at the rightabout of described protrusion direction of drawing lead-in wire in the described electrode.
3. capacitor as claimed in claim 1, the end surfaces of the described electrode pair of wherein said capacitor element protrudes on relative direction respectively, and draws lead-in wire and partly be connected with the plane surface of those end surfaces of described electrode respectively.
4. capacitor as claimed in claim 3 is wherein drawn at two electrical insulating board is provided between the lead-in wire.
5. capacitor as claimed in claim 1, wherein said electric insulation layer is made by the paraffin resin of polyaminoamide compound or modification.
6. capacitor as claimed in claim 1, wherein said plain film shape electrode pair has the polarizable electrode layer that forms respectively on the surface of current collector, each current collector is made up of metal forming or conducting polymer, and described polarizable electrode layer is made up of the mixture that comprises activated carbon, adhesive and conductive agent at least.
7. capacitor as claimed in claim 1, wherein described plain film shape electrode pair one of at least in use metal forming with the metal oxide film that forms in its surface.
8. capacitor as claimed in claim 1, the wherein projection that on the interior bottom surface of described metal shell and described opening sealing plate, is formed for locating and/or fixing the core of this capacitor element respectively.
9. capacitor as claimed in claim 1 wherein provides the core assembly of hollow at the core of described capacitor element.
10. as one of any capacitor of claim 1 to 3, wherein to provide gradually thin thickened wall portions with the interior bottom surface of described metal shell and the contact relation of inner surface.
11. capacitor as claimed in claim 1, protrude in relative direction respectively on the electrode tip surface of wherein said capacitor element, and one of described electrode tip surface of described capacitor element is electrically connected with the interior bottom surface of described metal shell, and provide electric current collector plate, and the described external connection terminals of described electric current collector plate extends through described opening sealing plate with the external connection terminals that is connected with another described electrode tip surface electrical of described capacitor element.
12., wherein provide external connection terminals on the outer bottom surface of described metal shell as the capacitor of claim 11.
13. as the capacitor of claim 11 or claim 12, the described electric current collector plate that wherein has described external connection terminals be made of metal and also as described opening sealing plate opening sealling current collector plate.
14., wherein on periphery edge part, form the projection of annular with the surface that contacts the described opening sealing plate that is provided with or described opening sealling current collector plate with described rubber-like elasticity assembly as one of any capacitor of claim 11 to 13.
15. as the capacitor of claim 11 or claim 12, wherein with contact with this external connection terminals of described electric current collector plate the described opening sealing plate that is provided with provide black box in the throughhole portions.
16. as the capacitor of claim 15, wherein with described opening sealing plate form electric insulation layer on that surface of described external connection terminals of the described electric current collector plate that keeps in touch of described throughhole portions.
17. capacitor as the claim of claim 13, wherein the outer periphery in that side that is connected with described capacitor element of described opening sealling current collector plate partly forms the annular protrusion branch, and provides electric insulation layer comprising on the described outer periphery part that described annular protrusion divides.
18., wherein on one of the interior bottom surface of described metal shell, described electric current collector plate and described opening sealling current collector plate, be formed at least locating and/or the projection of the core of fixing described capacitor element as one of any capacitor of claim 11 to 13.
19. as claim 11, one of any capacitor of 16 and 17, wherein said electric insulation layer is made by the paraffin resin of polyaminoamide compound or modification.
20. one of any capacitor as claim 11 to 13, wherein said plain film shape electrode pair has the polarizable electrode layer that surface at current collector forms respectively on except the electrode tip surface portion, described current collector is made up of metal forming or conducting polymer, and described polarizable electrode layer is made up of the mixture that comprises activated carbon, adhesive and conductive agent at least.
21. as one of any capacitor of claim 11 to 13, wherein said plain film shape electrode pair use one of at least metal forming with the metal oxide film that forms in its surface.
22., wherein provide the core assembly of hollow at the core of described capacitor element as one of any capacitor of claim 11 to 13.
23. as one of any capacitor of claim 11 to 13, wherein to provide gradually thin thickened wall portions with the described interior bottom surface of described metal shell and the contact relation of inner surface.
24. connect a plurality of methods of attachment as the capacitor that claim 11 defined, wherein all capacitors link together by soldering (brazing) and/or joint welding (welding) at the outer bottom surface or the outer surface of their metal shells separately.
25., wherein use coupling assembling to realize this connection as the capacitor method of attachment of claim 24.
26. as the capacitor of claim 1 or claim 11, wherein said electric insulation layer is made by propylene melamine (aryl-melamine) resin.
27. as claim 1,5,11,16,17,19 and 26 one of any capacitors, wherein, described metal shell is applied oil removal treatment, surface roughening processing and oxide-film form handle at least a as the preliminary treatment that is used on described metal shell, providing described electric insulation layer.
28. as the capacitor of claim 1 or claim 11, wherein said electric insulation layer is anodized aluminium lamination.
29. as the capacitor of claim 1 or claim 11, the described open end portion of wherein said metal shell forms crooked shape.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003075677 | 2003-03-19 | ||
| JP075677/2003 | 2003-03-19 | ||
| JP075676/2003 | 2003-03-19 |
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| Publication Number | Publication Date |
|---|---|
| CN1701402A true CN1701402A (en) | 2005-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200480001183 Pending CN1701402A (en) | 2003-03-19 | 2004-03-18 | Capacitor and method of connecting the same |
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| CN (1) | CN1701402A (en) |
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