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High-voltage system for motor vehicle and method for diagnosing high-voltage system for motor vehicle

A high-voltage system and a technology for a motor vehicle, applied in the fields of a high-voltage system for a motor vehicle and a high-voltage system for diagnosing a motor vehicle

Active Publication Date: 2012-12-26
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art it is not possible to fully diagnose the discharge circuit functionality without additional cost-intensive hardware

Method used

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  • High-voltage system for motor vehicle and method for diagnosing high-voltage system for motor vehicle
  • High-voltage system for motor vehicle and method for diagnosing high-voltage system for motor vehicle
  • High-voltage system for motor vehicle and method for diagnosing high-voltage system for motor vehicle

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Experimental program
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Embodiment Construction

[0026] figure 1 A high-voltage system 1 according to the invention is shown. The high-voltage system firstly comprises a high-voltage battery 2, which can be connected via a lead 3 to a load generally designated "4", here in particular a pulse converter 5, which is connected to an electric motor 6 of the motor vehicle upstream. Furthermore, the resulting intermediate circuit contains a capacitor 7 , the intermediate circuit capacitor.

[0027] If the high-voltage supply is switched on, for example by turning the ignition key or the like, it is first switched on "softly" in order to charge the capacitor 7 in a controlled manner. For this purpose, firstly the switching device 8 and the switching device 9 assigned to the upstream resistor 10 are closed on the high-voltage battery 2 . If a minimum voltage is reached, the switching device 11 is closed and the switching device 9 is opened again, whereby the load 4 is connected directly to the high-voltage battery 2 . The switchi...

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PUM

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Abstract

The invention relates to a high-voltage system (1) for a motor vehicle (26), comprising a high-voltage battery (2) that supplies at least one load (4), in particular an inverter (5), by means of lines (3), wherein at least one switching means (8, 9, 11) is provided in order to disconnect the high-voltage supply, a capacitor (7) connected in parallel with the load (4), and a discharge circuit (12) for discharging the capacitor (7), said discharge circuit having a discharge resistor (13) and a discharge switching means (14) that closes the discharge circuit, wherein a diagnostic device having a measuring device (16) for measuring a voltage course that describes the voltage course at the capacitor (7), in particular during the discharge process (17), and a control device (15) for evaluating said voltage course in regard to a malfunction of the high-voltage system (1) is provided.

Description

technical field [0001] The invention relates to a high-voltage system for a motor vehicle, comprising a high-voltage battery for supplying at least one load, in particular a converter, via leads, wherein at least one switching device is provided for disconnecting the high-voltage supply, said high-voltage The system also includes a capacitor connected in parallel with the load and a discharge circuit for discharging the capacitor. The discharge circuit has a discharge resistor and a discharge switch device for closing the discharge circuit. The invention also relates to a device for diagnosing Such a high pressure system approach. Background technique [0002] In particular, high-voltage batteries are currently also commonly used in hybrid or electric vehicles. Such high-voltage batteries can use voltages greater than 60V, for example up to 300V. Motor vehicles are known, for example, with an electric motor, in which the direct current of the high-voltage battery is first ...

Claims

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Application Information

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IPC IPC(8): G01R31/28G01R31/36H02J7/34B60L3/00
CPCG01R31/2827G01R31/3644G01R31/043G01R31/028G01R31/3606G01R31/007B60L3/0046G01R31/42G01R31/382G01R31/64
Inventor N·沃尔夫
Owner AUDI AG
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