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High-voltage system for a fuel cell vehicle for determining an insulation fault

A fuel cell system and high-voltage system technology, applied in the field of HV systems, can solve problems such as large structural space requirements, fuel cell design limitations, and functional costs

Pending Publication Date: 2020-11-06
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requires functional expense and leads to limitations in the design of the fuel cell
Double component costs, greater installation space requirements and additional coordination costs

Method used

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  • High-voltage system for a fuel cell vehicle for determining an insulation fault
  • High-voltage system for a fuel cell vehicle for determining an insulation fault
  • High-voltage system for a fuel cell vehicle for determining an insulation fault

Examples

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Embodiment Construction

[0035] figure 1 An embodiment of a HV system 10 according to the invention is shown schematically. The HV system 10 includes: a fuel cell circuit 11 having a fuel cell system 20 ; and a traction circuit 12 having an HV battery pack 40 . The motor 60 is connected to the traction circuit 12 via the pulse inverter 50, and other HV components 70 are connected to the traction circuit 12 via the pulse inverter 50, such as fuel cell auxiliary equipment, charging equipment, 12V DC / DC converter , air conditioner compressor, HV heater, etc. A direct voltage converter (DC / DC converter) 30 is arranged between the fuel cell circuit 11 and the traction circuit 12 . The input terminal of the DC / DC converter 30 is connected to the poles of the fuel cell system 20 , and the output terminal of the DC / DC converter 30 is connected to the poles of the HV battery pack 40 .

[0036] The HV system 10 according to the invention comprises only a single insulation monitor 13 which is arranged in the ...

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Abstract

The invention relates to a high-voltage system of a fuel cell vehicle and method for operating said system.

Description

technical field [0001] The invention relates to an HV system of a fuel cell vehicle and a method for operating the HV system. Background technique [0002] HV systems for electric and hybrid vehicles often have a nominal voltage of several hundred volts, for example 350 to 400 volts. It is therefore necessary to take safety measures in order to avoid threats to human life and vehicle components due to the high voltage. Due to insulation faults, uncontrolled fault currents may develop which are high enough to threaten human life, cause fires or cause other property damage. Thus, in a vehicle, the insulation resistance of the HV system (high voltage system) is periodically or continuously monitored. [0003] Different vehicle manufacturers have agreed on a safety standard (LV123) for high-voltage technology in electric and hybrid vehicles. This standard refers to the ISO 6497-3 standard, which predetermines thresholds for the insulation resistance which must be compulsorily...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/40H01M8/04313
CPCB60L58/40H01M8/04313Y02E60/10Y02E60/50Y02T10/70Y02T90/40B60L3/0053B60L2210/10B60L2210/40B60L58/30H01M8/04664H01M2220/20H01M2250/20
Inventor M·布罗M·席德迈尔J·D·拉米雷斯罗沙
Owner AUDI AG
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