Circuit assembly for an electric overhead line vehicle with a battery, and method for stabilizing a direct current of a high-voltage DC intermediate circuit in such a motor vehicle

Abstract

The invention relates to a circuit assembly (1) for a motor vehicle which can be supplied with a direct current at least temporarily via an overhead line (20), comprising a high-voltage battery (4) for providing electric energy, a high-voltage DC intermediate circuit (5) which can be coupled to an overhead line (20) conducting a direct current, and a DC-to-DC converter (7) between the high-voltage DC intermediate circuit (5) and the high-voltage battery (4), wherein the DC-to-DC converter (7) is designed to support a DC voltage (UE) of the high-voltage DC intermediate circuit (5) by transmitting energy from the high-voltage battery (4) in the event of a voltage dip due to a loss of contact between the high-voltage DC intermediate circuit (5) and the overhead line (20) and / or to reduce the direct current (UE) by increasing a transmission of energy into the high-voltage battery (4) in the event of a voltage increase due to a loss of contact between the high-voltage DC intermediate circuit (5) and the overhead line (20). The invention additionally relates to a method for stabilizing a direct current (UE) of a high-voltage DC intermediate circuit (5) in a motor vehicle.

Description

technical field [0001] The invention relates to a circuit arrangement for a motor vehicle and to a method for stabilizing a DC voltage of a high-voltage DC link circuit in a motor vehicle. Furthermore, the invention relates to a motor vehicle. Background technique [0002] In the field of electromobility, designs are also increasingly being developed for the electrification of the powertrain of commercial vehicles. Here, however, the insufficient energy density of the energy stores used is a problem. One solution to this problem is to provide electrical energy externally via overhead lines. The commercial vehicle can then be operated via the overhead line and / or the energy store can be charged during travel. If an electrical connection is made between the current collector and the overhead line of a motor vehicle, there may be a brief loss of contact between the current collector and the overhead line due to uneven road surfaces and vibrations. On the motor vehicle side,...

AI Technical Summary

Problems solved by technology

Here, however, the insufficient energy density of the energy storage used is a problem

On the side of the motor vehicle, this brief loss of contact results in a brief voltage fluctuation

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