Capacitor assembly, vehicle-drive power electronics device with a capacitor assembly

Patent metadata

Field	Value
Publication number	US-12580130-B2
Application number	US-202117925650-A
Country	US
Kind code	B2
Filing date	May 10, 2021
Priority date	May 20, 2020
Publication date	Mar 17, 2026
Grant date	Mar 17, 2026

Abstract

Various embodiments of the teachings herein include a capacitor assembly comprising: a capacitor extending at least partially around a space, the capacitor including first, positive-voltage-side current terminals and second, negative-voltage-side current terminals; a first bus bar electrically connected to the first current terminals; and a second bus bar electrically connected to the second current terminals. The first and the second busbar extend parallel to or obliquely to an end face of the space.

First claim

What is claimed is:

1 . A capacitor assembly comprising:
an annular capacitor including a plurality of capacitors arranged at least partially around a circumference of a space, the annular capacitor including a first set of positive-voltage-side current terminals and second set of negative-voltage-side current terminals; a first bus bar electrically connected to each terminal in the first set of current terminals; and a second bus bar electrically connected to each terminal in the second set of current terminals; wherein at least one of the first busbar or the second busbar comprises a central portion disposed within the space and a set of arms extending therefrom and comprising contact portions for the corresponding current terminals.

2 . The capacitor assembly as claimed in claim 1 , wherein the first current terminals and/or the second current terminals are distributed in a circumferential direction of the space.

3 . The capacitor assembly as claimed in claim 1 , wherein the first busbar and the second busbar are arranged in the space or in alignment in the axial direction of the space.

4 . The capacitor assembly as claimed in claim 1 , the first busbar and the second busbar overlap one another.

5 . The capacitor assembly as claimed in claim 1 , further comprising an electrically isolating insulation layer;
wherein the first busbar, the insulation layer, and the second busbar overlap one another; the insulation layer is arranged between the first busbar and the second busbar; and the first busbar and the second busbar are physically connected to one another and electrically isolated from one another.

6 . The capacitor assembly as claimed in claim 1 , wherein the first busbar and the second busbar are arranged perpendicularly to the axial direction.

7 . The capacitor arrangement as claimed in claim 1 , wherein:
the first busbar has a first electrical terminal element for connecting a first current conductor and a first cutout for conducting a second current conductor through to a second electrical terminal element; the second busbar has the second terminal element for connecting the second current conductor and a second cutout for conducting the first current conductor through to the first terminal element; the first terminal element and the second cutout arranged one above the other in the axial direction of the space; and the second terminal element and the first cutout arranged one above the other in the axial direction of the space.

8 . The capacitor assembly as claimed in claim 7 , wherein
the first terminal element forms a third cutout in the first busbar, the third cutout having a smaller diameter than the second cutout; and/or the second terminal element forms a fourth cutout in the second busbar, the fourth cutout having a smaller diameter than the first cutout.

9 . The capacitor assembly as claimed in claim 7 , wherein the first cutout and the second cutout are partially aligned with one another in the axial direction of the space.

10 . The capacitor assembly as claimed in claim 1 , wherein the first busbar and/or the second busbar is stamped, cut or laser-beam cut from a metal sheet, a copper sheet, or a copper alloy sheet.

11 . The capacitor assembly as claimed in claim 1 , wherein the annular capacitor furthermore comprises a capacitor holder for holding the capacitor elements, the capacitor holder having a plurality of holder portions each supporting and securely hold one of the capacitor elements, and a plurality of connecting portions, which physically connect the holder portions to one another.

12 . The capacitor assembly as claimed in claim 11 , wherein the holder portions and the connecting portions are arranged alternately extending around the space.

13 . The capacitor assembly as claimed in claim 11 , wherein the holder portions each enclose one of the annular capacitor elements in its respective circumferential direction at least partially in the manner of a casing.

14 . The capacitor assembly as claimed in claim 11 , wherein the holder portions each have at least one first expansion compensation area narrower and/or thinner in comparison with the rest of the respective capacitor holder and is set up to compensate for expansion of the respective corresponding annular capacitor element in its circumferential direction.

15 . The capacitor assembly as claimed in claim 11 , wherein the connecting portions each have at least one second expansion compensation area narrower and/or thinner in comparison with the rest of the respective connecting portion and is set up to compensate for expansion of the annular capacitor elements or the capacitor in a circumferential direction of the capacitor.

16 . A vehicle-drive power electronics device comprising:
an annular capacitor including a plurality of capacitors arranged at least partially around a circumference of a space, the capacitor including first, positive-voltage-side current terminals and second, negative-voltage-side current terminals; a first bus bar electrically connected to the first current terminals; a second bus bar electrically connected to the second current terminals; wherein at least one of the first busbar or the second busbar comprises a central portion disposed within the space and a set of arms extending therefrom and comprising contact portions for the corresponding current terminals; wherein both the first and the second busbar extend parallel to or obliquely to an end face of the space; and an inverter for converting a direct current into a multi-phase alternating current and/or vice versa with direct-current terminals for transferring the direct current; wherein the capacitor assembly is electrically connected to the direct-current terminals.

Assignees

• Vitesco Technologies Germany Gmbh
• Vitesco Tech Geramny Gmbh

Inventors

• Paesler Thomas
• Ludwig Detlef

Classifications

• H02M7/003

  Constructional details, e.g. physical layout, assembly, wiring or busbar connections · CPC title

• H01G4/38

  Multiple capacitors, i.e. structural combinations of fixed capacitors · CPC title

• H01G4/32

  Wound capacitors · CPC title

• H01G4/228 Primary

  Terminals · CPC title

• H01G11/76

  specially adapted for integration in multiple or stacked hybrid or EDL capacitors · CPC title