US-12627083-B2 - Connection assembly, in particular for use in electric vehicles or hybrid vehicles

Abstract

A connection assembly ( 1 ) for use in electric vehicles or hybrid vehicles, comprising a first flat connection contact ( 11 ) for electrically contacting a first component ( 10 ) and a second flat connection contact ( 21 ) for electrically contacting a second component ( 20 ), wherein the first flat connection contact ( 11 ) and the second flat connection contact ( 21 ) overlap, and the first flat connection contact ( 11 ) and the second flat connection contact ( 21 ) are connected by means of a connection element ( 30 ). An insulating layer ( 40 ) is arranged between the connection element ( 30 ) and the first flat connection contact ( 11 ), said insulating layer electrically insulating the first flat connection contact ( 11 ) from the connection element ( 30 ), and/or an insulating layer ( 40 ) is arranged between the connection element ( 30 ) and the second flat connection contact ( 21 ), said insulating layer electrically insulating the second flat connection contact ( 21 ) from the connection element ( 30 ).

Inventors

• Klaus Eberle-Goubet
• Stefan Koch

Assignees

• ROBERT BOSCH GMBH

Dates

Publication Date

20260512

Application Date

20220401

Priority Date

20210420

Claims (11)

1. 1 . A connection assembly ( 1 ) for use in electric vehicles or hybrid vehicles, comprising a first flat connection contact ( 11 ) for electrically contacting a first electric and/or electronic component ( 10 ) and a second flat connection contact ( 21 ) for electrically contacting a second electric and/or electronic component ( 20 ), wherein the first flat connection contact ( 11 ) and the second flat connection contact ( 21 ) overlap in an overlap region ( 5 ) and lie flatly one over the other in the overlap region ( 5 ), wherein the first flat connection contact ( 11 ) and the second flat connection contact ( 21 ) are connected in the overlap region ( 5 ) by means of a connection element ( 30 ), wherein an insulating layer ( 40 ) is arranged between the connection element ( 30 ) and the first flat connection contact ( 11 ), said insulating layer electrically insulating the first flat connection contact ( 11 ) from the connection element ( 30 ), and the insulating layer ( 40 ) is arranged between the connection element ( 30 ) and the second flat connection contact ( 21 ), said insulating layer electrically insulating the second flat connection contact ( 21 ) from the connection element ( 30 ).
2. 2 . The connection assembly according to claim 1 , wherein the insulating layer ( 40 ) is formed on the connection element ( 30 ) and/or on the first flat connection contact ( 11 ) and/or on the second flat connection contact ( 21 ).
3. 3 . The connection assembly according to claim 1 , wherein the insulating layer ( 40 ) is formed from a silicate and/or a phosphate and/or a nitride and/or an oxide.
4. 4 . The connection assembly according claim 1 , wherein the connection element ( 30 ) projects through a first recess ( 12 ) in the first flat connection contact ( 11 ) and through a second recess ( 22 ) in the second flat connection contact ( 21 ), wherein the insulating layer ( 40 ) is arranged around the first recess ( 12 ) and/or around the second recess ( 22 ).
5. 5 . The connection assembly according to claim 1 , wherein the connection element ( 30 ) is configured as a screw connection with a screw ( 31 ) and/or a washer ( 32 ), wherein the insulating layer ( 40 ) is arranged between a head of the screw ( 31 ) and the first and second flat connection contacts ( 11 , 21 ) and/or the insulating layer ( 40 ) is arranged between the washer ( 32 ) and the flat connection contacts ( 11 , 21 ) and/or the insulating layer ( 40 ) is arranged between the screw bushing ( 33 ) and the flat connection contacts ( 11 , 21 ).
6. 6 . The connection assembly according to claim 1 , wherein the connection element ( 30 ) is completely coated by the insulating layer ( 40 ).
7. 7 . The connection assembly according to claim 1 , wherein the first flat connection contact ( 11 ) and/or the second flat connection contact ( 21 ) are formed from copper.
8. 8 . The connection assembly according to claim 1 , wherein the connection element ( 30 ) is formed from steel.
9. 9 . The connection assembly according to claim 1 , wherein the first flat connection contact ( 11 ) is configured as a power bus or as a cable lug and/or the second flat connection contact ( 21 ) is configured as a power bus or as a cable lug.
10. 10 . An electric and/or electronic assembly ( 100 ) comprising a connection assembly ( 1 ) according to claim 1 , wherein the first flat connection contact ( 11 ) is configured as an electric connection of the first electric and/or electronic component ( 10 ) and the second flat connection contact ( 21 ) is configured as an electric connection of the second electric and/or electronic component ( 20 ).
11. 11 . The connection assembly according to claim 1 , wherein the contact element ( 30 ) is spaced apart from and does not contact the first flat connection contact ( 11 ) and the second flat connection contact ( 12 ).

Description

BACKGROUND The invention relates to a connection assembly, in particular for use in electric vehicles or hybrid vehicles. In power electronics, for example in electric vehicles or hybrid vehicles, electric and/or electronic components carrying high electric currents are connected to one another. Due to the high electric currents, current-conducting elements by which the electric and/or electronic components are connected must have correspondingly low electric resistances and thus large cross-sections and or materials with high electric conductive properties. For example, in such assemblies, power is supplied via power buses, which are also called busbars, and the electric and/or electronic components are connected to one another via power buses. To connect electric and/or electronic components to one another, flat connection contacts, for example power buses or cable lugs, which form electric connections of the electric and/or electronic components, are electrically connected to one another. The flat connection contacts overlap and are connected to one another, for example screwed, in the region in which they overlap. When high currents flow over the connection, the maintenance of a low electric material resistance and the maintenance a low electric contact resistance is essential for minimizing the electric total conduction loss. SUMMARY According to the invention, a connection assembly, in particular for use in electric vehicles or hybrid vehicles, is proposed. The connection assembly comprises a first flat connection contact for electrically contacting a first electric and/or electronic component and a second flat connection contact for electrically contacting a second electric and/or electronic component, wherein the first flat connection contact and the second flat connection contact overlap in an overlap region and lie flatly one over the other in the overlap region, wherein the first flat connection contact and the second flat connection contact are connected in the overlap region by means of a connection element. According to the present invention, an insulating layer is arranged between the connection element and the first flat connection contact, said insulating layer electrically insulating the first flat connection contact from the connection element, and/or an insulating layer is arranged between the connection element and the second flat connection contact, said insulating layer electrically insulating the second flat connection contact from the connection element. Compared to the prior art, the connection has the advantage that the connecting means are electrochemically insulated from the flat connection contacts. Thus, the risk of corrosion is advantageously reduced while ensuring a good and stable connection between the first flat connection contact and the second flat connection contact over the entire lifetime of the connection assembly. Furthermore, a good connection with low bias loss due to setting or creep behavior is ensured. According to one advantageous embodiment, it is provided that the insulating layer is formed on the connection element and/or on the first flat connection contact and/or on the second flat connection contact. The insulating layer can, for example, be advantageously configured as a coating on the connection element and/or on the first flat connection contact and/or on the second flat connection contact. For example, the insulating layer can be formed in a material-locking manner on the connection element and/or on the first flat connection contact and/or on the second flat connection contact. According to one advantageous exemplary embodiment, it is provided that the insulating layer is formed from a silicate and/or a phosphate and/or a nitride and/or an oxide. An insulating layer configured in this way separates the connection element electrochemically particularly well from the flat connection contacts. Thus, the risk of corrosion is advantageously reduced while ensuring a good and stable connection between the first flat connection contact and the second flat connection contact over the entire lifetime of the connection assembly. According to one advantageous embodiment, it is provided that the connection element projects through a first recess in the first flat connection contact and through a second recess in the second flat connection contact, wherein the insulating layer is arranged around the first recess and/or around the second recess. An advantageously stable and good electric contact can be established between the two connection contacts by means of a connection element configured in this way. For example, the connection element indirectly abuts the connection contacts around the recess with the interposition of the insulating layer. The insulating layer thus separates the connecting means from the connection contacts and electrically insulates them from the connection contacts. Thus, a current flow between the connection element and the connection co