A fuel cell purge control method and device based on drt analysis

A fuel cell and control method technology, which is applied to fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve problems such as poor purging effect, improve cold start performance, reduce icing risk, and improve durability Effects on sex and longevity

Active Publication Date: 2022-05-13
BEIJING SINOHYTEC
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention discloses a fuel cell purging control method based on DRT analysis, which is used to solve the technical problem of poor purging effect when the fuel cell system shuts down in the prior art

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  • A fuel cell purge control method and device based on drt analysis
  • A fuel cell purge control method and device based on drt analysis
  • A fuel cell purge control method and device based on drt analysis

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Embodiment Construction

[0049] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0050]As used herein, the term "comprise" and its variants mean open inclusion, ie "including but not limited to". The term "or" means "and / or" unless otherwise stated. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment." The term "another embodiment" means "at least one further embodiment". The terms "first", "second", etc. may refer to different or the same o...

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Abstract

The invention provides a fuel cell purging control method and device based on DRT analysis. After the fuel cell system is shut down, DRT analysis is performed on the electrochemical impedance spectrum when the fuel cell system is in a cold storage state and the low-frequency impedance of the fuel cell system is obtained. , the second intermediate frequency impedance and the second high frequency impedance; modify the first impedance target value and the second impedance target value according to the low frequency impedance, the second intermediate frequency impedance and the second high frequency impedance and determine a new first impedance target value and New target value of the second impedance; save the new target value of the first impedance and the new target value of the second impedance, so that the fuel cell system can be adjusted according to the new target value of the first impedance and the new target value of the second impedance before the next shutdown Purging, based on the optimized purge criteria, realizes the dynamic closed-loop cold purge of the fuel cell, reduces the risk of freezing in cold storage, improves the cold start performance of the stack, and improves the durability and life of the fuel cell.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell purge control method and device based on DRT analysis. Background technique [0002] After the fuel cell system is shut down, the generated water and humidified water may remain in the system during operation, which is not conducive to the next startup, especially when the ambient temperature drops below zero during the shutdown, the internal water may freeze, resulting in Parts, runners, diffusion layers, etc. freeze, causing start-up failures and component damage, so purge operations are often performed during shutdowns. [0003] Most of the purging methods in the prior art are simple purging. Some purging strategies only consider the high-frequency impedance of the fuel cell to achieve closed-loop purging, and do not monitor the internal impedance of the stack during the cold storage period, resulting in blowing Incomplete sweeping increases the risk of the sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04223H01M8/04228H01M8/04303H01M8/04537H01M8/04014
CPCY02E60/50
Inventor 李飞强张国强苗田伟赵兴旺
Owner BEIJING SINOHYTEC
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