TRANSIENT DETECTION IN A HIGH-VOLTAGE NETWORK OF AN ELECTRIC VEHICLE

Abstract

A method for detecting a transient of a voltage damper of an electric vehicle, wherein an electric vehicle is provided, having a voltage network and a voltage damper connected to the voltage network, and a measurement device connected to the voltage network detects a transient produced by the voltage damper as a result of a loading, a method for designing a voltage component of a voltage network of an electric vehicle, and a device for loading a voltage damper of an electric vehicle.

Claims

1. A method for detecting a transient of a voltage damper of an electric vehicle, the method comprising: providing an electric vehicle having a voltage network and a voltage damper connected to the voltage network; detecting, by a measurement device connected to the voltage network, a transient produced by the voltage damper as a result of a loading; mounting a loading device in the electric vehicle; coupling the loading device to a hydraulic unit of the voltage damper; and loading, by the loading device, the hydraulic unit.

2. The method according to claim 1, wherein the loading device loads the hydraulic unit based on a particular time-dependent load profile.

3. The method according to claim 2, wherein the time-dependent load profile is determined artificially or corresponds to a real measured loading.

4. The method according to claim 1, wherein the transient is detected for a selected load level of the voltage damper.

5. The method according to claim 4, wherein the selected load level is selected from a plurality of different load levels.

6. The method according to claim 1, wherein the electric vehicle is provided on a homologation test stand or on a roller test stand.

7. A method for designing a voltage component of a voltage network of an electric vehicle, the method comprising: providing a further component of a voltage network that is different from a voltage damper of the voltage network of an electric vehicle, wherein the further component is designed based on a transient produced by the voltage damper; and detecting the transient using the method according to claim 1.

8. A device for loading a voltage damper of an electric vehicle having a voltage network and a voltage damper connected to the voltage network, wherein the device, in operation, performs a method comprising: detecting, by a measurement device connected to the voltage network, a transient produced by the voltage damper as a result of a loading; coupling the device to a hydraulic unit of the voltage damper; and loading, by the device, the hydraulic unit.

9. The device according to claim 8, comprising: a pump system; a valve; a coupling device that couples the device to the hydraulic unit of the voltage damper; and an arithmetic unit functionally connected to the pump system and the valve, wherein the arithmetic unit, in operation, controls the pump system and the valve.

10. The device according to claim 9, wherein the arithmetic unit, in operation, controls the pump system or the valve based on a particular time-dependent load profile.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

[0032] The disclosure is represented schematically with the aid of one embodiment in the drawings and shall be further described with reference to the drawings.

[0033] The FIGURE shows in a top view, an electric vehicle having a loading device according to one embodiment of the disclosure.

DETAILED DESCRIPTION

[0034] The FIGURE shows in a top view an electric vehicle 1 having a loading device 2 according to one embodiment of the disclosure. The electric vehicle 1 comprises a high-voltage network, a high-voltage damper 10 connected to the high-voltage network, and a loading device 2, which is mounted in the electric vehicle 1 and coupled to a hydraulic unit of the high-voltage damper 10.

[0035] The loading device 2 is adapted to be used in a method according to the disclosure, which is described in the following. The loading device 2 can encompass a pump system, a valve, a coupling device for coupling the device to a hydraulic unit of the high-voltage damper 10, and an arithmetic unit functionally connected to the pump system and the valve for automatic control of the pump system and the valve. The arithmetic unit is adapted to control the pump system and/or the valve depending on a particular time-dependent load profile 20.

[0036] Moreover, the electric vehicle 1 can encompass, in familiar manner, a high-voltage battery 11, an electric motor 12 having a power electronics 120, a charger 13, a charging socket 14, a DC voltage converter 15, a heater 16, an intelligent emergency brake system 17, an electrical coolant compressor 18 and/or an electronic torque distributor 19 as further high-voltage components, each of which is hooked up to the high-voltage network.

[0037] The following method according to the disclosure is carried out to detect a transient 100 of the high-voltage damper 10 of the electric vehicle 1.

[0038] The electric vehicle 1 is provided with the high-voltage network and the high-voltage damper 10 connected to the high-voltage network. The electric vehicle 1 can be provided on a homologation test stand or on a roller test stand.

[0039] A measurement device 3 connected to the high-voltage network detects the transient 100 produced by the high-voltage damper 10 as a result of a loading.

[0040] The loading device 2 mounted in the electric vehicle 1 and coupled to a hydraulic unit (not shown separately) of the high-voltage damper 10 loads the hydraulic unit.

[0041] The loading device 2 loads the hydraulic unit preferably independently of the particular time-dependent load profile 20. The time-dependent load profile 20 can be determined artificially or corresponding to a measured real loading.

[0042] Advantageously, the transient 100 is detected for a selected load level of the high-voltage damper 10. The load level can be selected from a plurality of different load levels.

[0043] For the design of a further high-voltage component of the high-voltage network of the electric vehicle 1 other than the high-voltage damper 10, the following method is carried out.

[0044] The further high-voltage component is designed in dependence on a transient 100 generated by the high-voltage damper 10. The transient 100 is detected in a method according to the disclosure for detecting the transient 100 of the high-voltage damper of the electric vehicle.

[0045] German patent application no. 102022120172.4, filed Aug. 10, 2022, to which this application claims priority, is hereby incorporated herein by reference, in its entirety.

[0046] Aspects of the various embodiments described above can be combined to provide further embodiments. In general, in the following claims, the terms used should not be construed to limit the claims to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.