EP4336675A1 - Barre omnibus, procédé de fabrication d'une barre omnibus et procédé de connexion d'un composant électronique à la barre omnibus - Google Patents

Barre omnibus, procédé de fabrication d'une barre omnibus et procédé de connexion d'un composant électronique à la barre omnibus Download PDF

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Publication number
EP4336675A1
EP4336675A1 EP22194906.8A EP22194906A EP4336675A1 EP 4336675 A1 EP4336675 A1 EP 4336675A1 EP 22194906 A EP22194906 A EP 22194906A EP 4336675 A1 EP4336675 A1 EP 4336675A1
Authority
EP
European Patent Office
Prior art keywords
busbar
recess
section
region
conductive layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22194906.8A
Other languages
German (de)
English (en)
Inventor
Sebastiaan De Boodt
Pablo Paz Sagüés
Yuqiang Zhang
Wei Shi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rogers BVBA
Original Assignee
Rogers BVBA
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 Rogers BVBA filed Critical Rogers BVBA
Priority to EP22194906.8A priority Critical patent/EP4336675A1/fr
Priority to PCT/EP2023/074769 priority patent/WO2024052547A1/fr
Publication of EP4336675A1 publication Critical patent/EP4336675A1/fr
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/16—Rails or bus-bars provided with a plurality of discrete connecting locations for counterparts
    • H01R25/161—Details

Definitions

  • the present invention concerns a busbar and a method for manufacturing a busbar, in particular a busbar on that several capacitors can be arranged, and a method for connecting an electronic component to the busbar.
  • Laminated busbars typically comprise layers of fabricated copper separated by thin dielectric materials, laminated into a unified structure. Examples for laminated busbars can be found in CN 203 504 394 U , CN 104 022 414 A1 or CN 202 474 475 U .
  • a "plug-in" region is included into the busbar, in order to connect electrical poles of an electronic component, such as a capacitor directly to different conductive layers, wherein each of the conductive layers is assigned to a type of the poles provided by each capacitor.
  • the capacitors are connected to the plug-in region by inserting a pin into a hole of the plug-in region. Subsequently, the pins are adhesively connected to the busbar, for example by soldering and/or welding.
  • busbar according to claim 1 a method for manufacturing a busbar according to claim 14 and a method of connecting an electronic component to such a busbar according to claim 15.
  • Preferred embodiments are incorporated in the dependent claims, the description and the figures.
  • a busbar in particular a laminated busbar, configured for mounting an electronic component on the busbar, in particular a passive electronic component
  • the busbar comprises a first conductive layer having a main body and at least one plug-in region, the at least one plug-in region being configured for inserting a contact element of the electronic component, in particular a pin of the electronic component, into the busbar, wherein the plug-in region comprises
  • the present invention suggests a plug-in region having a bridge section, being formed as a comparably narrow and long, i. e. slim, bridge section.
  • the bridge section is formed by a strip and/or web section, extending from the centre section to the main body of the first conductive layer.
  • the reduced loss of thermal energy during the soldering process by using the bridge elements of the present invention has benefits regarding efficiency of the soldering process, especially with respect to the energy amount being necessary to create a soldering process.
  • the soldering process can be realized by using less energy and within a shorter period of time. This also reduces the probability of damages of electric components, which are connected to the busbar by a soldering process, since the electronic components are no longer exposed to high temperatures, being necessary to perform the soldering process by using the bridge elements known from the prior art.
  • the first conductive layer includes a plug-in region, the plug-in region being arranged inside the base body.
  • a plug-in region is located for example in middle of the first conductive region and not in an edge region or at the border of the first conductive layer and is especially incorporated for receiving a contact element such as a pin element of a capacitor.
  • the first conductive layer, the bridge section, the main body and/or the centre section has a thickness between 0.1 mm and 6 mm, preferably between 0.3 mm and 4 mm and most preferably between 0.5 mm and 3 mm. Furthermore, it is provided that the first conductive layer is made from copper and/or aluminium. Especially, creating a busbar being made from aluminium has benefits, because it is a lightweight form of a busbar.
  • the at least one first conductive layer and/or the at least second conductive layer is made from a bare metal, such as copper or aluminum.
  • the thickness of the busbar measured in a direction perpendicular to the main extension plane, is between 0.5 mm and 5 mm, more preferably between 0.3 mm and 3 mm, and most preferably between 0.5 mm and 3 mm.
  • the thickness between 0.5 mm and 3 mm is favourable for busbars used in inverters. Because the power transferred in vehicles is not very high as in other busbar applications, thin conductor can be used in such applications.
  • the busbar includes a third layer, in particular a third conductive layer.
  • a third conductive layer in particular a third conductive layer.
  • the busbar is either a flat product extending in a main extension plane or is bended as a 3D structure, for example U-shaped, Z-shaped or L-shaped.
  • the first conductive section and/or the second conductive section are preferably a copper or aluminum sheet, especially a bare copper or aluminum sheet that mainly defines the main extension plane.
  • first conductive layer and/or a second conductive layer i. e. corresponding base bodies, centre sections and/or bridging sections, being made from aluminium or copper and furthermore being preferably plated with a tin and or nickel layer.
  • a covering by a tin- or nickel-plated layer avoids corrosion of the components of the busbar.
  • the busbar comprises a first conductive layer and a second conductive layer, each extending mainly parallel to a main extension plane and being stacked along a stacking direction above each other.
  • the first conductive layer and the second conductive layer each include a plug-in region having the specifications, being mentioned above.
  • both the first conductive layer and the second conductive layer have a comparably narrow and long bridge section. It is conceivable that the centre section of the first conductive layer and/or second conductive layer is arranged in the same plane as the plane of the main body or, alternatively, it is located in a parallel plane, being spaced from the plane of the main body.
  • first recess and the second recess and/or the receiving recess are formed as cut-outs in the first conductive layer and/or second conductive layer.
  • cut-outs extend through the whole thickness of the first conductive layer and/or second conductive layer and therefore reach from a top side of the first conductive layer to the bottom side of the first conductive layer and/or second conductive layer.
  • the first recess and/or the second recess and/or the receiving recess is formed as a region of reduced thickness of the conductive layer.
  • the bridge section is arranged at least partially between the first recess and the second recess.
  • Such an arrangement of the first recess and the second recess indicates that the bridge section does not extend only in a radial direction. This is beneficial, since it allows to create a comparably long and narrow bridge section without extending the necessary space, being required for the plug-in region. As a result, it is possible to create a compact plug-in region, being incorporated into the first conductive section, having simultaneously a slim bridge section.
  • the first recess and/or the second recess has a maximum second length, measured along a radial direction starting from the middle of the centre section, wherein the first length is longer than the second length, preferably at least 1.3 times, more preferably at least 1.6 times and most preferably 2 times longer than the maximum second length. It turned out that it is possible dimensioning the first and second maximum length to create a compact configuration for the bridge section and the first and second recess, being also mechanically stable for creating a plug-in region, which also can withstand the mechanical pressure, which might apply during the bonding process, especially the soldering process. At the same time, the dimension mirrors the comparably narrow and long design of the bridge section.
  • the first width of the bridge section has a value between 0.2 mm and 2.5 mm, more preferably between 0.55 mm and 1.5 mm and most preferably between 0.65 mm and 1.1 mm.
  • the first width is determined as an average value along the extension of the bridge section along its extension direction.
  • the extension direction is slanted to a radial direction, starting from the middle of the centre section.
  • the extension direction of the bridge section is slanted or angled about an angle between 10° and 75°, more preferably between 15° and 60° and most preferably between 20° and 50°. As a consequence, a compact plug-in region is formed.
  • the busbar comprises a second conductive layer.
  • the second conductive layer also includes a plug-in region having a bridge section, having the ratio between the first width and the first length as being discussed above.
  • the first and second conductive layer are stacked above each other and preferably spaced from each other by an insulation layer.
  • the first recess and the second recess include a section of varying second lengths, wherein along a circumferential direction around the centre section, the second length of the first recess and/or the second recess measured along the radial direction, varies within the section of varying width.
  • the first recess and second recess are mainly formed by a section of varying second lengths.
  • a ratio of the width of the section of varying second length along the circumferential direction to a total width of the first recess and the second recess extending along the circumferential direction is greater than 0.5, preferably larger than 0.7 and most preferably larger than 0.8.
  • the second length of the recess varies nearly completely along the dimensions of the second or first recess along the circumferential direction.
  • the first recess and the second recess form sharp angled end zones, i. e. no circular shaped end section along the circumferential direction.
  • a maximum second length of the first recess and/or the second recess measured along the radial direction has a value between 1 mm and 10 mm, preferably between 2 mm and 8 mm and most preferably between 2.5 mm and 6 mm.
  • the first width of the bridge section is constant along its extension direction.
  • the first width of the bridge section varies along the extension direction.
  • the first width decreases with increasing distance to the centre section of the plug-in region.
  • the first width modulates, i. e. increases and decreases with increasing distance to the centre section.
  • the first recess or the second recess are substantially crescent shaped.
  • the centre region has a circular or elliptical shape. Furthermore, it is provided that the first recess and the second recess are shaped and/or dimensioned equally. In other words: the first recess and the second recess have the same shape and/or the same dimension. As a result a comparably symmetric material distribution in the plug-in region is realized, supporting a mechanical strength and a homogenous heat distribution.
  • the centre region can be covered by nickel and/or tin. Covering the centre region is advantageous, since these regions are usually in contact with air and/or the contact element. Therefore, they are prone for corrosion, which can be avoided by a nickel and/or tin plating / cover,
  • Another aspect of the present invention is a plug-in region for a busbar, according to the present invention. All features being discussed for the busbar apply analogously to the plug-in region and vice versa. Especially, it is conceivable that such a plug-in region is provided and inserted into a corresponding recess of the first conductive layer.
  • a method for manufacturing a busbar according to the present invention wherein the first recess and/or the second recess is cut out from a metal layer forming the first conductive layer of the busbar.
  • the first and/or second recess is formed.
  • the bridge sections are deformed by turning the centre section, such that bridge sections are twisted for forming the desired shape of the bridge section. All features, being discussed and specified in context of the busbar apply analogously to the method for manufacturing the busbar.
  • Another aspect of the present invention is a method for connecting an electrical or electronic component to a busbar, wherein a contact element of an electronic component is inserted into a plug-in region of the busbar, wherein the contact element is soldered and/or welded to the plug-in region, preferably automatically by a robot. All features being discussed in context of the busbar apply analogously to the method for connecting an electric component to the busbar and vice versa.
  • a busbar 1 according to an exemplary embodiment of the present invention is illustrated.
  • the busbar 1 is configured as a laminated busbar, comprising at least a first conductive layer 10 and a second conductive layer 20 that are separated by at least one isolation layer 15 (see figure 2 ). Both the first conductive layer 10 and the second conductive layer 20 are provided to collect and to conduct a current caused by several capacitors 5 being arranged on the busbar 1 and respectively connected to the first conductive layer 10 and the second conductive layer 20.
  • the first conductive layer 10 and/or the second conductive 20 layer are made out of a metal, in particular copper and/or aluminium.
  • the first conductive layer 10, the second conductive layer 20 and the isolation layer 15 are extending parallel to each other and are stacked on each other along a stacking direction S being perpendicular to a main extending plane M ( Fig. 2 ).
  • the first conductive layer 10 and the second conductive layer 20 are respectively connected to one electrical pole of each of the capacitors 5.
  • the first conductive layer 10 and/or the second conductive layer 20 each comprises at least one terminal 17 for delivering a certain voltage provided by the capacitors 5 arranged on the busbar 1.
  • the first conductive layer 10 extends in a first plane and preferably the corresponding terminal 17 of the first conductive layer 10 extends in the first plane.
  • each capacitor 5 has a pin 2 assigned to a positive pole of the capacitor 5 and a pin 2 assigned to a negative pole of the capacitor 5. Both pins 2 reach through the busbar 1, wherein one pin 2 of each capacitor 5 is connected to the first conductive layer 10 and the other pin 2 is connected to the second conductive layer 20. It is provided that all negative poles are connected to the first conductive layer 10 and all positive poles of the capacitors 5 are connected to the second conductive layer 20.
  • plug-in regions 30 are provided ( Fig. 3 ).
  • the plug-in region 30 comprises a hole, forming a receiving recess 31, being adapted in its shape to the form of the pin 2 so that the pin 2 can be inserted into the hole by a movement in a direction perpendicular to the first plane 11 and/or parallel to the stacking direction S.
  • the hole might have a circular shape.
  • the pin 2 has a rectangular cross section and the hole is formed rectangular in the same form.
  • the hole and the cross section of the pin 2 are realized according to a key-lock principle.
  • a plug-in region 30 of the first conductive layer 10 is illustrated in detail in a perspective view.
  • the plug-in region comprises a centre section 32 having the receiving recess.
  • a first recess 4 and the second recess 6 surround the centre section 32.
  • a main body 3 of the first conductive layer 10 is connected to the centre section via a bridge section 8.
  • the centre section 32 of the plug-in region 30 extends in a plane parallel to the main extension direction of the busbar and the main body, wherein the plane of the centre section 32 is spaced from the plane of the main body 3.
  • FIG. 4 a detailed view on the plug-in region 30 according to the state of the art is illustrated in a top view.
  • the plug-in region 30 is surrounded by the first recess 4 and the second recess 6.
  • the first recess 4 and the second recess 6 are intended for limiting a heat transfer during a soldering process that connects the pin 2 to the plug-in region 30. Without such recesses 4 the heat generated by the soldering would be directly transferred to the main body 3 of the first conductive layer 10 and could not be used for soldering.
  • the electrical connection between the first conductive layer 10 and the plug-in region 30 is established by the bridge element 8, being located along a circumferential direction CD between the first recess 4 and the second recess 6.
  • the centre section 32 of the plug-in region 30 has a disk-like shape.
  • FIG. 5 a plug-in region 30 for a busbar 1 according to a preferred embodiment of the present invention is illustrated.
  • the bridge section 8 extending between the main body 3 and the centre section 32, has a first length L1 along its extension direction E and a first width W1 measured along a direction perpendicular to the extension direction E, wherein a ratio of the first width W1 to the first length L1 is smaller than 1, preferably smaller than 0.5 and more preferably smaller than 0.3.
  • bridge sections 8, being comparably slim have the benefit that the energy transfer, i. e. the heat transfer, via the bridge section 8 during the soldering process is significantly reduced.
  • heat is stored in the centre section 32 and the bridge section 8 instead of getting lost by heat transfer to the main body 3 of the first conductive layer 10.
  • the bridge section 8 being illustrated in figure 4b, can only establish temperatures, being about 210 °C during the soldering process. This represents a significant improvement concerning the ability to store energy in the region of the receiving recess 31.
  • energy for performing the soldering process can be reduced and the chances for successfully soldering a pin or contact element to the first conductive section, i. e. to the receiving recess 31, can be significantly improved.
  • the extension direction E does not correspond to a radial direction R, starting from a middle of a centre section 32.
  • the bridge section 8 does not extend parallel to a radial direction R starting from a middle of the centre section 32.
  • the extension direction E of the bridge section 8 is slanted or angled with respect to the radial direction R, preferably about an angle between 10° and 75°, preferably between 15° and 60° and most preferably between 20° and 50°.
  • the bridge section 8 is arched in a plane, being mainly parallel to the main extension plane.
  • the bridge section 8 and the centre section 32 and the main body 3 are arranged in a common plane, being parallel to the main extension plane M.
  • the centre section 32 is arranged in a plane, being parallel to the plane of the main body 3 and being spaced from the plane of the main body 3.
  • the bridge section 8 Due to the extension of the bridge section 8, along a direction being not parallel to the radial direction R, the bridge section 8 is at least partially arranged between the first recess 4 and the second recess 6 along the radial direction R.
  • the bridge section 8 is at least partially arranged between the first recess 4 and the second recess 6 along the radial direction R.
  • the first recess 4 and/or the second recess 6 has a maximum second length L2, measured along the radial direction R.
  • the first length L1 is longer than the second length L2, preferably at least 1.3 times, more preferably at least 1.6 times and most preferably 2 times longer than the maximum second length L2.
  • the bridge element 8 has a sufficient length for creating the positive effects concerning the storage of heat and simultaneously provide a mechanical stability for the centre section 32 and the plug-in region 30, being incorporated into the first conductive layer 10.
  • the plug-in region 30 is included in the first conductive layer 10, especially is incorporated in a centre section 32 of the first conductive layer 10.
  • the plug-in region 30 is located within the first conductive layer 10, preferably dependent on the dimensions of the electric component, being intended to be plugged into this receiving recess 31 of the plug-in region 30.
  • a second length L2 measured along the radial direction R starting from the middle of the centre section 32, varies along the circumferential direction CD.
  • a section of varying second lengths L2 in which the first recess 4 and/or second recess 6 changes its second length L2 along the circumferential direction CD.
  • the second length L2 of the first recess 4 and/or the second recess 6 of the embodiment of figure 5 vary mainly along its whole extension along the circumferential direction CD, especially the first recess 4 and the second recess 6 have tapering end zones forming sharp angled end zones of the first recess 4 and the second recess 6 along the circumferential direction CD.
  • the maximum second length L2 is shifted from a middle of the first recess 4 and/or second recess 6 along the circumferential direction CD.
  • the first recess 4 and the second recess 6 have the same or a similar shape and size.
  • the shape of the first recess 4 and/or the second recess 6 is substantially crescent-shaped shaped.
  • the first width W1 of the bridge section 8 is mainly constant, i. e. the first width W1 is constant along an extension, being at least 0.5 times of the first length L1.
  • the first width W1 of the bridge section 8 varies along the extension direction E and for example decreases with increasing distance from the centre section 32.
  • the first width W1 is determined as the average first width W1 along the extension direction E of the bridge section 8 extending from the centre section 32 to the main body 3 of the first conductive section.
  • the first conductive layer 10 and the second conductive layer 20 each have at least one plug-in region 30 according to the described specifications including the bridge section 8 being formed by a long and narrow section.
  • the thickness of the bridge section 8 is equal to the thickness of the main body 3 and/or the centre section 32 of the plug-in region 30.
  • the thickness of the first conductive layer 10 is between 0.1 mm and 6 mm, preferably between 0.2 mm and 5 mm and most preferably between 0.3 mm and 4 mm.
  • the first conductive layer 10 and/or the second conductive layer 20 is plated or unplated.
  • the conductive layer, made from aluminium or copper, is plated by a tin-plated or nickel-plated layer.

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  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
EP22194906.8A 2022-09-09 2022-09-09 Barre omnibus, procédé de fabrication d'une barre omnibus et procédé de connexion d'un composant électronique à la barre omnibus Pending EP4336675A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22194906.8A EP4336675A1 (fr) 2022-09-09 2022-09-09 Barre omnibus, procédé de fabrication d'une barre omnibus et procédé de connexion d'un composant électronique à la barre omnibus
PCT/EP2023/074769 WO2024052547A1 (fr) 2022-09-09 2023-09-08 Barre omnibus, procédé de fabrication d'une barre omnibus et procédé de connexion d'un composant électronique à la barre omnibus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22194906.8A EP4336675A1 (fr) 2022-09-09 2022-09-09 Barre omnibus, procédé de fabrication d'une barre omnibus et procédé de connexion d'un composant électronique à la barre omnibus

Publications (1)

Publication Number Publication Date
EP4336675A1 true EP4336675A1 (fr) 2024-03-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22194906.8A Pending EP4336675A1 (fr) 2022-09-09 2022-09-09 Barre omnibus, procédé de fabrication d'une barre omnibus et procédé de connexion d'un composant électronique à la barre omnibus

Country Status (2)

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EP (1) EP4336675A1 (fr)
WO (1) WO2024052547A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1094553A1 (fr) * 1999-10-21 2001-04-25 F.C.I. - Framatome Connectors International Pastille de contact pour plaques conductrices ou des barres omnibus
CN202474475U (zh) 2012-02-15 2012-10-03 中国科学院上海应用物理研究所 一种低感叠层母排
CN203504394U (zh) 2013-10-25 2014-03-26 国家电网公司 一种适用于igbt并联的复合母排
CN104022414A (zh) 2014-05-22 2014-09-03 苏州西典机电有限公司 一种新型的叠层母排
EP3599676B1 (fr) 2018-07-26 2021-06-30 Rogers BV Procédé de connexion d'un composant électrique à une barre de bus, barre de bus plate et système réalisé par un tel procédé

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1094553A1 (fr) * 1999-10-21 2001-04-25 F.C.I. - Framatome Connectors International Pastille de contact pour plaques conductrices ou des barres omnibus
CN202474475U (zh) 2012-02-15 2012-10-03 中国科学院上海应用物理研究所 一种低感叠层母排
CN203504394U (zh) 2013-10-25 2014-03-26 国家电网公司 一种适用于igbt并联的复合母排
CN104022414A (zh) 2014-05-22 2014-09-03 苏州西典机电有限公司 一种新型的叠层母排
EP3599676B1 (fr) 2018-07-26 2021-06-30 Rogers BV Procédé de connexion d'un composant électrique à une barre de bus, barre de bus plate et système réalisé par un tel procédé

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Publication number Publication date
WO2024052547A1 (fr) 2024-03-14

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