System comprising a bus bar device and a power converter housing, and method for the production thereof, power converter for a vehicle, and vehicle
The invention relates to a system, including a bus bar device and a power converter housing, wherein the bus bar device includes a stack made of at least two bus bars and an electrically insulating insulation body, which encloses the bus bars in two insulating regions of the bus bar device, wherein each bus bar includes two opposing base surfaces extending in the direction of current flow and lateral surfaces connecting the base surfaces and extending in the direction of current flow, wherein the bus bar device includes a temperature control region formed between the insulating regions, in which the insulation body has an opening that exposes one of the lateral surfaces and a portion of at least one of the base surfaces of a respective bus bar, wherein the bus bars are thermally connected to the power converter housing in the temperature control region by a heat transfer means.
1. A system ( 5 ), comprising a bus bar device ( 7 ) and a power converter housing ( 6 ), the bus bar device comprising a stack made of at least two bus bars ( 7 a - 7 c ) and an electrically insulating insulation body ( 9 ), which encloses the bus bars ( 7 a - 7 c ) in two insulating regions ( 10 a - 10 d ) of the bus bar device ( 7 ), each bus bar ( 7 a - 7 c ) comprising two opposing base surfaces ( 14 a , 14 b ) extending in the direction of current flow and lateral surfaces ( 13 a , 13 b ) connecting the base surfaces ( 14 a , 14 b ) and extending in the direction of current flow,
wherein
the bus bar device ( 7 ) comprises a temperature control region ( 11 a - 11 c ) formed between the insulating regions ( 10 a - 10 d ), in which the insulation body ( 9 ) has an opening ( 12 ), which exposes one of the lateral surfaces ( 13 a ) and a portion of at least one of the base surfaces ( 14 a , 14 b ) of a respective bus bar ( 7 a - 7 c ), wherein the bus bars ( 7 a - 7 c ) are thermally connected to the power converter housing ( 6 ) in the temperature control region ( 11 a - 11 c ) by a heat transfer means ( 19 ).
2. The system according to claim 1 , wherein the insulation body ( 9 ) includes a protrusion ( 16 ) in the temperature control region ( 11 a - 11 c ) between each pair of adjoining bus bars ( 7 a - 7 c ), the protrusion extending along the base surfaces ( 14 a , 14 b ) beyond the exposed lateral surface ( 13 a ).
3. The system according to claim 1 , wherein the insulation body ( 9 ) comprises a spacer ( 17 ) in the insulating region ( 10 a - 10 d ), which rests on the power converter housing ( 6 ) and spaces the bus bars ( 7 a - 7 c ) apart from the power converter housing ( 6 ) in the temperature control region ( 11 a - 11 c ).
4. The system according to claim 1 , wherein the power converter housing ( 6 ) has a depression ( 20 ) receiving the heat transfer means ( 19 ).
5. The system according to claim 1 , wherein the heat transfer means ( 19 ) is a gap filler.
6. The system according to claim 1 , wherein the bus bar device ( 7 ) includes a further temperature control region ( 11 c ) that is separated from the first insulating region ( 10 a ) by a further insulating region ( 10 c ), the bus bars ( 7 a - 7 c ) extending in an angled manner, in particular by 90°, in the further insulating region ( 10 c ).
7. The system according to claim 1 , wherein a further temperature control region ( 11 b , 11 c ), which is separated from the first insulating region ( 10 a ) by a further insulating region ( 10 b , 10 c , 10 d ), is provided, the stack comprising a further bus bar ( 7 c ) in the further temperature control region ( 11 b , 11 c ), which is enclosed by the insulation body ( 9 ) in the first temperature control region ( 11 a ) and/or is not thermally connected to the power converter housing ( 6 ) by the heat transfer means ( 19 ).
8. A method for producing a system ( 5 ) comprising a bus bar device ( 7 ) and a power converter housing ( 6 ), comprising the following steps:
providing a power converter housing ( 6 );
applying a heat transfer means ( 19 ) to the power converter housing ( 6 );
providing a bus bar device ( 7 ), which comprises a stack made of at least two bus bars ( 7 a - 7 c ) and an electrically insulating insulation body ( 9 ), which encloses the bus bars ( 7 a - 7 c ) in two insulating regions ( 10 a - 10 d ) of the bus bar device ( 7 ), wherein each bus bar ( 7 a - 7 c ) comprises two opposing base surfaces ( 14 a , 14 b ) extending in the direction of current flow and lateral surfaces ( 13 a , 13 b ) connecting the base surfaces ( 14 a , 14 b ) and extending in the direction of current flow, wherein the bus bar device ( 7 ) includes a temperature control region ( 11 a - 11 c ) formed between the insulating regions ( 10 a - 10 d ) in which the insulation body has an opening ( 12 ) that exposes one of the lateral surfaces ( 13 a ) and a portion of at least one of the base surfaces ( 14 a , 14 b ) of a respective bus bar ( 7 a - 7 c ); and
introducing the bus bars ( 7 a - 7 c ) exposed in the temperature control region ( 11 a - 11 c ) into the heat transfer means ( 19 ).
9. A power converter ( 3 ) for a vehicle ( 1 ), comprising a system ( 5 ) according to claim 1
and a power unit ( 8 a ) accommodated in the power converter housing ( 6 ).
10. A vehicle ( 1 ), comprising an electrical machine ( 2 ), which is configured to drive the vehicle ( 1 ), and a power converter ( 3 ) according to claim 9 , which is configured to provide an alternating current for the electrical machine ( 2 ).