WO2006005277A1 - Condensateur et module de condensateurs - Google Patents

Condensateur et module de condensateurs Download PDF

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Publication number
WO2006005277A1
WO2006005277A1 PCT/DE2004/002244 DE2004002244W WO2006005277A1 WO 2006005277 A1 WO2006005277 A1 WO 2006005277A1 DE 2004002244 W DE2004002244 W DE 2004002244W WO 2006005277 A1 WO2006005277 A1 WO 2006005277A1
Authority
WO
WIPO (PCT)
Prior art keywords
capacitor
connection
outer terminal
capacitor according
fixing
Prior art date
Application number
PCT/DE2004/002244
Other languages
German (de)
English (en)
Inventor
Michael Setz
Stefan Nowak
Albrecht Hörger
Hubertus Goesmann
Original Assignee
Epcos Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Epcos Ag filed Critical Epcos Ag
Publication of WO2006005277A1 publication Critical patent/WO2006005277A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/04—Electrodes or formation of dielectric layers thereon
    • H01G9/06—Mounting in containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/14—Structural combinations or circuits for modifying, or compensating for, electric characteristics of electrolytic capacitors

Definitions

  • the invention relates to a capacitor having a connection element and a capacitor module having a plurality of capacitors.
  • connection elements are provided which are screwed to a capacitor.
  • a capacitor has a connection element.
  • the connecting element is preferably used for further contacting of the capacitor, for example, the supply of lines in which electrical currents can flow. These electrical currents can be used to charge the capacitor.
  • cables brought up can also be used to discharge the capacitor, that is, to take the electric energy stored therein in the form of electrical current from the capacitor.
  • a connection element is attached to the capacitor by means of laser welding.
  • the laser welding is performed so that both a part of the connection element and a part of the capacitor is melted. This allows a particularly intimate connection between the two elements can be achieved.
  • connection element With the help of such an intimate connection advantageously a low contact resistance between the connection element and the capacitor can be achieved.
  • connection element to the capacitor can be achieved by suitably carrying out the laser welding.
  • Such a connection is particularly advantageous in capacitors which are exposed to external mechanical stresses, for example vibrations in a motor vehicle.
  • the specified capacitor makes use of the idea of using a laser welding a particularly advantageous connection of a connection element to the capacitor achieve.
  • the specified manner of contacting is particularly suitable for electrochemical double-layer capacitors.
  • Such capacitors are preferably used in motor vehicles as an energetic buffer.
  • a connection between the connection element and the capacitor can be generated, which is advantageous both in terms of electrical contact resistance and in terms of mechanical stability.
  • connection element is attached to the housing of the capacitor.
  • a connection element can be fastened to the cover of a cup-shaped housing.
  • the materials of the connecting element on the one hand and the capacitor or of the part of the capacitor to be welded on the other hand are equal to one another.
  • the same materials can be used.
  • aluminum is used.
  • the capacitor or its housing made of aluminum.
  • a capacitor has a stainless steel housing. In this case, it is advantageous to choose a member to be welded stainless steel.
  • connection element has a thread.
  • a thread can preferably be used to connect further electrical contact elements with the capacitor by screws.
  • an electrically conductive sheet or a bus bar can be fastened by means of a screw connection to a capacitor formed in this way.
  • connection element is fastened to an outer terminal of the capacitor by means of laser welding.
  • the capacitor therefore has an external connection which is suitable for fastening further connection elements.
  • a connection element can also advantageously be used to connect a plurality of capacitors, which in each case have an external connection, to one another electrically conductively and also mechanically stably.
  • the capacitor can be used as an external connection, an element which in turn is attached by laser welding to the capacitor.
  • a Such an embodiment has the advantage that the current transport, starting from the outside at the connection element and ending at the capacitor itself, in each case runs through laser-welded connections, whereby a particularly low electrical resistance of the capacitor can be ensured.
  • a plurality of laser welding points are formed at the connection between a connecting element and the capacitor.
  • Laser welding is a process that is particularly well suited for the pointwise joining of two objects.
  • a weld point is produced from a melt by melting the materials located near the weld.
  • spot welds can be created spatially close to each other or even at a slightly greater distance from each other in a contact area between the two elements to be welded.
  • the region to be welded is easily accessible from the outside, so that the thermal energy required for the laser welding can be supplied from the outside by means of a laser beam without difficulty.
  • a further capacitor is attached to a connection element.
  • Such an embodiment has the advantage that a plurality of capacitors can be connected to one another in a battery or in a module.
  • This connection can be made particularly low impedance, since the advantages of the laser welding both at the contact of the connection element to the first and to the second capacitor each provide a low contact resistance.
  • an outer terminal is connected to a housing of a capacitor by means of laser welding.
  • External connections can for example be mounted on lids of cup-shaped housing.
  • Such attachment preferably takes place by means of laser welding on the basis of the advantages already described above with regard to contact resistance and mechanical strength of such a connection.
  • the external connection conveys the connection of the capacitor winding usually contained in the capacitor to the outside and an optionally still used connection element ensures that electrical currents can flow from the external terminal of the capacitor into further electrical components.
  • the connection element thus also serves, for example, to connect a capacitor to further electrical components.
  • an external connection is part of a housing of a capacitor.
  • the external connection does not have to be connected as a separate part to the housing, but the external connection can be integrally integrated in a part of the housing.
  • the cover of a cup-shaped housing by corresponding projections, beads or other shapes may be designed so that the lid itself as part of the housing at the same time as an external connection for connecting further electrical contact elements, is suitable.
  • an outer terminal has a projection which engages in a recess of a connection element.
  • such an embodiment has the advantage that a battery of a plurality of juxtaposed capacitors, each having on the top connecting elements, by simply placing a hole having connecting element and subsequent laser welding is made.
  • a recess of the connecting element is a hole.
  • Such a hole has the advantage that an external connection can be made from one side of the connection element and that the laser welding can take place from the other side.
  • laser welding points are arranged along a line. This has the advantage that the laser welding can take place in a region in which different elements abut each other, so that by targeted positioning of a laser beam material of both the one and the other element material can be melted, resulting in a
  • Laser welding connection or positioning a laser welding point with good electrical and mechanical properties leads.
  • the melt formed from the two elements can mix and thus lead to an intimate connection of the two elements, for example the connection element and the capacitor or an external connection.
  • the number of welding points is selected so that it is adapted to a predetermined current carrying capacity. This means that at a given current and in about the previously known Current carrying capacity of a single weld point, the number of welds can be selected so that the desired current carrying capacity is achieved. For very large currents, for example, capacitor capacitors are specified here, which can absorb or deliver several amps of power, the number of welds must be 100, 200 or even 1000.
  • the current carrying capacity of a single welding point is added to the current carrying capacity of the other welding points due to the electrical parallel connection of the currents flowing through the welding points.
  • the number of welding points depends on the required total conductor cross section, which is given by the sum of individual conductor cross sections of individual laser welding points. This in turn depends on the laser power and the cross-sectional area of the laser focus.
  • an external connection is a flow-molded part.
  • Extruded parts have the advantage that they are particularly good laser weldable.
  • connection element is a flow press.
  • the outer terminal and connecting element each contain aluminum.
  • an aluminum of purity 99.5 is used. But it can also be another suitable material, such as stainless steel can be used.
  • a capacitor module which contains a plurality of capacitors.
  • the capacitors are at least partially connected to one another by a connection element, wherein the connection of the connection element to each of the capacitors connected thereto is produced by laser welding.
  • the capacitors may just as well be present in a parallel circuit or else in a mixed series / parallel circuit.
  • a capacitor which has at least one outer terminal with at least one fixing element, wherein at least one attached to the outer terminal connecting element is provided, which has a circular recess into which engages the fixing element.
  • the at least one fixing element engages in the Connection element, that when the external connection is held a rotation of the capacitor around its longitudinal axis is possible.
  • Such a capacitor has the advantage that it can be rotated in any orientation about its longitudinal axis, without causing the position of the connecting element must be changed.
  • the fixing element is preferably a projection which is at least partially elastic. In this way, a particularly secure latching of the connection element to the outer connection of the capacitor can be achieved.
  • the outer terminal may be formed with a plurality of fixing elements in the form of protrusions of the type mentioned. These are preferably arranged concentrically about a central axis.
  • the capacitor may preferably be firmly connected to the connection element after the definition of a suitable orientation for its application. This is preferably done by welding and / or soldering.
  • a capacitor arrangement in which a first and a second capacitor are present, wherein the first capacitor has at least one outer terminal formed with at least one fixing element.
  • the connecting element is attached to the outer terminal of the first capacitor and to the second capacitor and has at least one circular recess into which engages the fixing element of the first capacitor.
  • Fixing element in such a way in the connection element, that a rotation of the first capacitor according to the type mentioned is made possible.
  • the second capacitor may have an external connection as in the first capacitor, in which case the connecting element has two circular recesses, wherein the fixing element of one of the two capacitors engages in each recess. It is also preferred that a rotation of said type of the second capacitor is made possible.
  • the positioning of a second capacitor to be connected to the first can be freely selected along a particular arc. This is possible because the connection element can be freely rotated around both capacitors.
  • FIG. 1 shows a capacitor in a schematic cross section.
  • FIG. 2 shows a section through the condenser from FIG. 1 along the line II-II.
  • FIG. 3 shows a capacitor module in a schematic cross section.
  • FIG. 4 shows a section through the module from FIG. 3 along the line IV-IV.
  • FIG. 5 shows two capacitors with a position-independent connection element.
  • FIG. 6 shows the engagement of fixing elements arranged on the capacitors in the recesses of a connecting element.
  • FIG. 1 shows a capacitor 1 which has a housing 41 on its outside. On the upper side of the housing 41, a recess is arranged. In the recess, a connection element 3 is arranged. The connecting element 3 is provided with a thread 5, which is arranged on a pin. At the top of the housing 41, at the point where the connection element 3 and the housing 41 touch each other, weld points 6 are attached to the transition point. These welds 6 are produced by laser welding. They allow a low electrical contact resistance between the connection element 3 and the housing 41.
  • FIG. 2 shows the arrangement of several spot welds 6 in one plane. It can be seen that the welding points are arranged along a line, wherein the distance between the welding points 6 may well vary.
  • the welding points can produce a low-resistance and mechanically stable connection with a sufficiently large cross-section. At the same time, a connection can be made that causes only a low heat input, so that the capacitor 1 is not damaged or even destroyed.
  • the method of laser welding can be applied to single double-layer capacitors or even to modules containing any number of interconnected single capacitors. Here an interconnection with extremely low internal resistance can be realized.
  • FIG. 3 shows a capacitor module with a first capacitor 1 and a second capacitor 2.
  • An external contact 7 is arranged on the upper side of each capacitor 1, 2.
  • the external contact 7 forms the positive pole
  • the housing 41 forms the negative pole of the capacitor
  • the housing 42 forms the positive pole.
  • the negative pole of the right capacitor is connected to the positive pole of the left capacitor 1.
  • the negative pole is disposed on the top and the positive pole on the housing.
  • the housing of the capacitor 21 is welded to the housing of the capacitor 1, so that a total of a series connection of the three capacitors 1, 2, 21 results.
  • the arrangement of the poles in a capacitor can be adjusted in the case of double-layer electrolytic capacitors by a corresponding applied poling voltage.
  • the first external terminals which are electrically insulated from the housing, generally serve to contact the capacitors located in the housing, which are in the form of capacitor films, for example.
  • capacitors consist of two electrode layers, between which a porous separator is arranged. Both the separator and the electrode layers are in contact with an electrolyte solution.
  • the layer arrangements of the electrode layers and the separators can be rolled up to capacitor windings.
  • the capacitors 1, 2 have external connections 7, which are connected to the housings of the capacitors 1 and 2 either by laser welding by means of spot welds 6 (compare, in particular, the right-hand side of the capacitor 2) or by other attachment methods.
  • An external connection 7 can also be part of the housing of the capacitor itself.
  • connection element has the form of a busbar, which can carry currents of a few amperes or even 10 A.
  • the busbar has at the locations of the external terminals 7 recesses 8, which are designed in the example of Figure 3 as holes.
  • the outer terminals 7 have projections 71 which engage in the recesses 8 of the connecting element 3.
  • welding spots 6 are produced, which are produced by laser welding.
  • the connection element 3 is connected to the capacitors 1 and 2.
  • the welding points 6 are located on top of the capacitor arrangement, so that they are easily accessible from the outside are and can be made by simply applying a laser beam.
  • FIG. 4 shows the arrangement of the welding spots 6 for the left-hand capacitor 1 and for the right-hand capacitor 2.
  • the welding points which connect the connecting element 3 to the projection 71 are arranged at a relatively large distance from each other, but regularly. The currents flowing through the welding points 6 add up to a total current, which is transported by the connecting element 3 into the capacitor.
  • FIG. 5 shows a first capacitor 1, which is connected by means of a connecting element 3 to a further, second capacitor 2.
  • the capacitors 1, 2 each have external terminals 7 with circular cross-sections, and are designed as connecting pins. They also have one or more, sometimes elastic
  • Fixing elements in the form of protrusions 71 which are formed with flares, steps or flanges. It is advantageous if the projections have radially outwardly directed hooks at the free end, which may be sharp or abyssal.
  • the fixing element may be formed as a projecting ring.
  • the connecting element 3 connecting the capacitors consists of an electrically conductive metal or sheet, from which recesses 8 are punched in the form of holes such that the external terminals 7 of the capacitors can engage in the recesses.
  • the recesses may also be realized as circular depressions of a metal or sheet metal connector.
  • connection element 3 or the recesses 8 in the form of holes of the connection element is pushed onto the fixing element or onto the projections such that they yield radially inward.
  • the connection element is pressed further until it has passed the hooks of the projections, the projections snap back into the original position and the connection element rests on a flange, a step or a flange of the projections.
  • the connection element 3 is securely locked to the outer terminal.
  • connection element 3 after its mounting on the outer terminal 7 of a capacitor 1.2 has a rotational clearance.
  • the connection element 3 can be rotated in an already mounted on an external connection state, so that the position of a second capacitor 2, which is to be attached to the connection element, along a circular arc A, B can be arbitrarily selected with a certain radius.
  • the radius is the distance between the centers of the two Recesses 8 of the connection element or alternatively, if the connection element is provided with only one recess, the distance between the center of this recess and the point of contacting the connection element with a second capacitor. 2
  • connection element not only is a free positioning (due to the dimensions of the connection element) of the capacitors relative to each other possible, but also the orientation of the capacitors themselves.
  • a rotation of the capacitors is also possible if the capacitors already connected to each other by the connection element, but not yet soldered / welded. They can therefore be rotated in each case in an orientation in which they can be contacted for example optimally with a power rail or another connection.
  • connection element 3 with only one recess 8 into which an outer connection 7 of only one capacitor 1 engages.
  • the external connection of a second or further capacitor 2 may be formed as desired and the connection between the connection element 3 and the second capacitor 2 done in any way, for example by means of a screw or clamp connection.
  • further capacitors with different external connection types compared to the first capacitor can advantageously be connected to the first capacitor.
  • the possibility of a free positioning of the second capacitor along a circular arc relative to the first capacitor still exists.
  • the mechanical connection between the external connection 7 and the connection element 3 is preferably supplemented or strengthened by means of a connection in which the materials of the external connection and of the connection element merge into one another.
  • soldering and / or welding connections are particularly favorable, in particular laser welding connections.
  • the mechanical connection of the connection element to the external connection by means of welding or soldering technology is preferably carried out after the desired orientations and positioning of the rotatable capacitors has taken place. Such compounds have the advantage that they are low impedance.
  • the soldering or welding is preferably carried out at one or more contact points between the connection element 3 and the projections 71 of the external terminals 7 of the capacitors.
  • At least one of the capacitors has a housing 41 with a top and a bottom or bottom side.
  • the outer terminal 7 is preferably attached to the top of the capacitor 41, wherein on the bottom side of the housing, a preferably be contacted with another capacitor busbar 3 'can be arranged.
  • one or more capacitors can also be attached to the bottom of a connection element 3.
  • FIG. 6 shows how a connection element 3 with two round recesses 8 is mounted on two capacitors 1, 2 of a capacitor arrangement.
  • the outer terminals are arranged with a plurality of concentric about a central axis or a central point, protruding Fixing elements 71 are formed, which engage in the recesses of the connecting element.
  • On the bottom side of the capacitors each busbars 3 ⁇ are arranged.
  • the arrows A and B each show the possibility of rotation of a first capacitor 1 about its axis and the circular arc, along which the second capacitor 2 can be positioned.
  • the present invention is not limited to individual capacitors and not to double-layer capacitors. It is applicable to all possible capacitors as well as to series connections, parallel connection and mixed interconnections of several capacitors with each other.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Abstract

La présente invention concerne un condensateur comprenant un élément de connexion (3) qui est fixé au condensateur (1, 2 21) au moyen de soudures laser. L'invention a également pour objet un module de condensateurs. Le soudage au laser permet d'obtenir une résistance électrique faible et une résistance mécanique élevée.
PCT/DE2004/002244 2004-07-09 2004-10-08 Condensateur et module de condensateurs WO2006005277A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004033351 2004-07-09
DE102004033351.3 2004-07-09

Publications (1)

Publication Number Publication Date
WO2006005277A1 true WO2006005277A1 (fr) 2006-01-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2004/002244 WO2006005277A1 (fr) 2004-07-09 2004-10-08 Condensateur et module de condensateurs

Country Status (1)

Country Link
WO (1) WO2006005277A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2790111A (en) * 1953-09-11 1957-04-23 Whirlpool Seeger Corp Electrical capacitor arrangements
US3300695A (en) * 1960-04-14 1967-01-24 Bosch Gmbh Robert High voltage capacitor arrangement
DE3518236A1 (de) * 1985-05-21 1986-11-27 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum haltern einer mehrzahl von kondensatoren
DE3723733A1 (de) * 1987-07-17 1989-01-26 Siemens Ag Verfahren zum herstellen eines elektrolytkondensators
JPH02288320A (ja) * 1989-04-28 1990-11-28 Nippon Chemicon Corp コンデンサの端子構造
JPH0334505A (ja) * 1989-06-30 1991-02-14 Nippon Chemicon Corp コンデンサの端子構造
EP0450122A1 (fr) * 1990-04-05 1991-10-09 SIEMENS MATSUSHITA COMPONENTS GmbH & CO. KG Batterie de condensateurs à interconnection de faible inductance
JP2003086472A (ja) * 2001-09-11 2003-03-20 Honda Motor Co Ltd 円筒型電気二重層キャパシタにおける電極巻回体と集電板とのレーザ溶接用治具
JP2003289023A (ja) * 2002-03-28 2003-10-10 Matsushita Electric Ind Co Ltd 固体電解コンデンサおよびその製造方法
DE10218295A1 (de) * 2002-04-24 2003-11-13 Epcos Ag Kondensatormodul und Kondensatorbatterie mit dem Kondensatormodul

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2790111A (en) * 1953-09-11 1957-04-23 Whirlpool Seeger Corp Electrical capacitor arrangements
US3300695A (en) * 1960-04-14 1967-01-24 Bosch Gmbh Robert High voltage capacitor arrangement
DE3518236A1 (de) * 1985-05-21 1986-11-27 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum haltern einer mehrzahl von kondensatoren
DE3723733A1 (de) * 1987-07-17 1989-01-26 Siemens Ag Verfahren zum herstellen eines elektrolytkondensators
JPH02288320A (ja) * 1989-04-28 1990-11-28 Nippon Chemicon Corp コンデンサの端子構造
JPH0334505A (ja) * 1989-06-30 1991-02-14 Nippon Chemicon Corp コンデンサの端子構造
EP0450122A1 (fr) * 1990-04-05 1991-10-09 SIEMENS MATSUSHITA COMPONENTS GmbH & CO. KG Batterie de condensateurs à interconnection de faible inductance
JP2003086472A (ja) * 2001-09-11 2003-03-20 Honda Motor Co Ltd 円筒型電気二重層キャパシタにおける電極巻回体と集電板とのレーザ溶接用治具
JP2003289023A (ja) * 2002-03-28 2003-10-10 Matsushita Electric Ind Co Ltd 固体電解コンデンサおよびその製造方法
DE10218295A1 (de) * 2002-04-24 2003-11-13 Epcos Ag Kondensatormodul und Kondensatorbatterie mit dem Kondensatormodul

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 0150, no. 62 (E - 1033) 14 February 1991 (1991-02-14) *
PATENT ABSTRACTS OF JAPAN vol. 0151, no. 61 (E - 1060) 23 April 1991 (1991-04-23) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 07 3 July 2003 (2003-07-03) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

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