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Method for diagnosing leakage, and fuel cell system

A fuel cell system and fluid system technology, applied in fuel cells, circuits, electric vehicles, etc., can solve problems such as system leakage and fluid overflow, and achieve the effects of improving safety, improving safety, and high accuracy

Active Publication Date: 2018-08-31
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to manufacturing tolerances (eg of seals) and wear due to operation, system leaks and fluid spillage from the system may occur

Method used

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  • Method for diagnosing leakage, and fuel cell system
  • Method for diagnosing leakage, and fuel cell system
  • Method for diagnosing leakage, and fuel cell system

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Embodiment Construction

[0027] figure 1 Steps a) to d) of the method 100 according to the invention are shown in a first embodiment, wherein, according to step a), a first reference gradient 210 of the operating pressure 200 of the first fluid is provided. The providing can be effected, for example, by measuring a first reference gradient 210 of the operating pressure 200 in the reference operating point 203 . According to step b), an operating gradient 201 of an operating pressure 200 in a first operating point 202 is determined. According to step c), a second reference gradient 211 is determined by means of a model 220 which takes into account the first reference gradient 210 according to step a) and at least one further operating parameter 221 . In this case, model 220 is predetermined as a mathematical function, so that second reference gradient 211 can be determined using further operating parameters 221 and first reference gradient 210 . According to step d), the operating gradient 201 is com...

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PUM

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Abstract

Disclosed is a method (100) for diagnosing the leakage of at least one first fluid (10) in a fluidic system (1), in particular in a fuel cell system (1), said method comprising the following steps: a)provision of a first reference gradient (210) of an operating pressure (200) of the first fluid (10), b) determination of an operating gradient (201) of the operating pressure (200) at a first operating point (202), c) defining a second reference gradient (211) of the operating pressure (200) by means of a model (220), the model (220) taking into consideration the first reference gradient (210) and at least one other operating parameter (221) at the first operating point (202), d) comparison of the operating gradient (201) and the second reference gradient (211).

Description

technical field [0001] The invention relates to a method for diagnosing leaks in a fuel cell system and the fuel cell system itself. Background technique [0002] Various systems are known from the prior art, which contain a fluid or into which a fluid is introduced. In order to retain fluid in such fluid systems, such systems are typically at least partially sealed. Due to manufacturing tolerances (eg of seals) and wear caused by operation, system leaks and fluid spillage from the system may occur. Therefore, monitoring for leaks can be meaningful especially in the case of safety-critical systems, such as fuel cell systems. For this purpose, a maximum permissible leakage value at a certain operating point under certain framework conditions is often defined. Therefore, during the service life of the fluid system, the operating point is extracted from the operating environment in particular several times and a previously defined operating point with defined frame condition...

Claims

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Application Information

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IPC IPC(8): H01M8/04089G01M3/26H01M8/0432H01M8/0438H01M8/04664
CPCG01M3/26H01M8/04089H01M8/04358H01M8/0438H01M8/04664Y02T10/70Y02T10/7072Y02T90/14Y02E60/50Y02T90/40
Inventor J·席尔德
Owner ROBERT BOSCH GMBH