Circuit arrangement, in particular for an electrically driven motor vehicle

Abstract

A circuit arrangement (1), in particular for an electrically driven motor vehicle, has at least one bus bar (5) which is connected electrically to a supplier (2) and which is connected to a first consumer (3) at a first transfer point (6) and to a second consumer (4) at a second transfer point (7). Both the first and the second transfer point (6, 7) are formed as flexible contact points.

Claims

1. A circuit for an electrically driven motor vehicle, comprising: at least one bus bar which is electrically connected to a supplier, and a first consumer connected to the at least one bus bar at a first transfer point and a second consumer connected to the at least one bus bar at a second transfer point, the first and second transfer points being formed as flexible contact points, wherein one of the flexible contact points includes a sleeve-shaped contact bushing having an electrically conducting inner surface with a press-in contact, the press-in contact having fork-shape contact elements that project from an end of the at least one bus bar and are pressed to contact with the contact bushing of one of the first and second consumers.

2. The circuit according to claim 1, wherein the fork-shape contact elements are flexible such that force-fit between the fork-shape contact elements and the contact bushing is produced by a pressing-in force that is less than 100 N.

3. The circuit according to claim 1, wherein another of the flexible contact points is embodied as a spring contact.

4. The circuit according to claim 1, wherein, the first and/or second consumer comprises an interconnect device having electronic components arranged thereon and interconnected with one another.

5. The circuit according to claim 1, wherein the supplier comprises a capacitor of a direct current intermediate circuit.

6. The circuit according to claim 1, further comprising a housing covering the at least one bus bar except for the first and second contact points.

Description

(1) Refer to the exemplary embodiment illustrated in the drawings for further description of the invention.

(2) FIG. 1 provides in a schematic side view of a circuit arrangement having a plurality of contacted bus bars, and,

(3) FIG. 2 provides a schematic sectional view with details of the electrical contacting of the bus bars at a first transfer point and a second transfer point.

(4) Equivalent parts are provided with the same reference numbers in all of the figures.

(5) FIG. 1 illustrates the schematic structure of a circuit arrangement 1 that executes, for example, the function of a control module for a power converter with integrated direct current converter. A supplier 2 comprises a battery-supplied direct current intermediate circuit having an intermediate circuit capacitor that provides an energy storage unit for a plurality of electrical networks coupled thereto. The supplier 2 is connected to first and second consumers 3, 4 via two rigid bus bars 5 that are guided, parallel to one another, in a housing 14. In a manner not depicted in greater detail, the first and second consumers 3, 4 comprise a plurality of electronic components arranged on printed circuit boards to which an electrical current may be supplied via the bus bar 5. The first consumer 3 here is an electronic control for a power inverter of an electric motor provided in the drive train of a motor vehicle. The second consumer 4 is a d.c.-d.c. current converter. The bus bars 5 are in electrically conducting contact with the first consumer at first transfer points 6. Correspondingly, the second consumer 4 is in electrically conducting contact at second transfer points 7. Each bus bar therefore has two transfer points 6, 7 for contacting the first and second consumers 3, 4. FIG. 2 illustrates details of the electrical contacting of the bus bar 5 in the region of the first and second transfer points 6, 7.

(6) Both the first and the second transfer points 6, 7 are formed as flexible contact points. At the first transfer point 6, the flexible contact point is realized by a spring contact 11, a butt contact being formed in that a spring contact element 12 reaches through a recess in the housing 14 and contacts a contact surface 8 on the bus bar 5. The spring contact element 12 is provided on the printed circuit board of the first consumer 3 and is resiliently prestressed towards the contact surface 8. The electrically conducting connection in this case is assured by a force fit between the contact element 12 and the contact surface 8.

(7) The second consumer 4 is connected to the bus bars 5 in an electrically conducting manner via press contacts 9. As depicted in FIG. 2, a sleeve-shaped contact bushing 13 having an electrically conducting inner surface, which is contacted in a force fit and in a positive fit by fork-like contact elements 10, is added to the printed circuit board of the second consumer 4. The fork-like contact elements 10 are flexible and resilient such that, for one thing, operation-related vibrations and component tolerances may be compensated. In addition, the force required to press the contact elements 10 into the contact bushing 13 is significantly less than that required for conventional press-in contacts, in which there is at least some plastic deformation of the contact part during the pressing-in process.

(8) Although the preferred exemplary embodiment of the invention has been illustrated and described in detail, the invention is not limited thereby. The person skilled in the art may derive other variations and combinations without departing from essential ideas of the invention.