Method for designing section of sealing element of hydrogen fuel cell under temperature-induced shrinkage

A technology of fuel cells and design methods, applied in fuel cells, electrical components, computer-aided design, etc., can solve problems such as decreased sealing performance, failure to consider sealing parts, etc., and achieve good guiding significance.

Pending Publication Date: 2021-12-10
TONGJI UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A variety of factors are cross-coupled at low temperature, which has a complex impact on the sealing performance, so that the seal that does not consider the temperature-induced shrinkage

Method used

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  • Method for designing section of sealing element of hydrogen fuel cell under temperature-induced shrinkage
  • Method for designing section of sealing element of hydrogen fuel cell under temperature-induced shrinkage
  • Method for designing section of sealing element of hydrogen fuel cell under temperature-induced shrinkage

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Embodiment

[0034] The present invention relates to a method of sealing optimizing design of seal sealing sections under temperature shrinkage, such as a fuel cell bipolar plate seal. figure 1 As shown, the method includes the following steps.

[0035] Step 1, sealing section design that is not considered at normal temperature is performed. The seal in this step is referred to as a seal A, and the sealing section can be used for an O-ring, a D-ring, a double peak, and the like, such as image 3 As shown, the present embodiment selects a bimodal seal ring, and the sealing material is a tri-pharmaceutical rubber, and the related parameter is selected as shown in Table 1.

[0036] Table 1 related parameters

[0037] Serial number parameter name Parameter code Parameter value 1 gas pressure P 0.2MPa 2 Work and ambient temperature t -40～25℃ 3 Friction coefficient μ 0.3 4 Sealing thickness h 0.6mm 5 Sealing width d 2mm 6 Sealing groove depth H 0....

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Abstract

The invention relates to a method for designing the section of a sealing element of a hydrogen fuel cell under temperature-induced shrinkage, which comprises the following steps of: 1) designing the section of the sealing element under a normal-temperature condition without considering a low-temperature effect, and obtaining an initial design scheme; 2) quantitative calculation under temperature-induced shrinkage is conducted, sealing element material parameters at the normal temperature and the low temperature are obtained, finite element analysis is conducted, and the average contact stress and the contact length are obtained; 3) calculating the leakage rate under temperature-induced shrinkage to obtain the total leakage rate of the sealing element; and 4) if the total leakage rate meets the design requirement, taking the total leakage rate as a final design scheme, and if the total leakage rate does not meet the design requirement, adjusting the current design scheme and then calculating the total leakage rate until the total leakage rate meets the design requirement. Compared with the prior art, the method has the advantages of considering low-temperature influence, being accurate in design quality judgment and the like.

Description

Technical field [0001] The present invention relates to the field of hydrogen fuel cell seal design, in particular, involving a sealing section design method of a temperature-shrinking hydrogen fuel cell seal. Background technique [0002] Because of the advantages of high energy, non-polluting, good portability, the hydrogen fuel cell is favored in the field of mobile power, small fixed power stations and electric vehicles, and is a very potential energy device. In a hydrogen fuel cell, the sealing performance is a key factor affecting its output performance and life. It plays an external environment, preventing the effect of the reactive gas and coolant leakage, and the sealing effect is good to directly affect the battery power generation efficiency and service life. Currently, the sealing and durability of the hydrogen fuel cell is a key technical bottleneck that restricts its promotion applications. [0003] The seal acts in a fuel cell to block the internal fluid. The seal ...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/17H01M8/0271G06F119/08G06F119/14
CPCG06F30/23G06F30/17H01M8/0271G06F2119/08G06F2119/14Y02E60/50
Inventor 朱文峰董睿韬
Owner TONGJI UNIV
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