WO2022246988A1 - 一种用于燃料电池堆塔的密封结构 - Google Patents

一种用于燃料电池堆塔的密封结构 Download PDF

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Publication number
WO2022246988A1
WO2022246988A1 PCT/CN2021/106856 CN2021106856W WO2022246988A1 WO 2022246988 A1 WO2022246988 A1 WO 2022246988A1 CN 2021106856 W CN2021106856 W CN 2021106856W WO 2022246988 A1 WO2022246988 A1 WO 2022246988A1
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metal plate
insulating layer
fuel cell
cell stack
sealing structure
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PCT/CN2021/106856
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English (en)
French (fr)
Inventor
姚金松
杨占奇
杨征
丁少军
秦疆
龚思琦
张鑫
李初福
王峰
刘智恩
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国家能源投资集团有限责任公司
北京低碳清洁能源研究院
国家能源集团宁夏煤业有限责任公司
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Publication of WO2022246988A1 publication Critical patent/WO2022246988A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0276—Sealing means characterised by their form
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the invention relates to the technical field of fuel cell power generation, in particular to a sealing structure for a fuel cell stack tower.
  • a solid oxide fuel cell is composed of an anode, a cathode and an electrolyte.
  • the anode is fuel gas, which is connected to a sealed gas supply by a pipe or a gas distribution plate.
  • the cathode is generally air or an oxidizing gas containing air.
  • the seal between the cathode inlet and outlet is more important, especially to prevent the gas short circuit between the cathode inlet and outlet, which will lead to the decline of the power generation performance of the stack in the running state, and serious conditions can damage the stack.
  • the height difference between the stack towers will be inconsistent.
  • the air from the inlet can easily enter the outlet directly, causing unexpected results to the power generation system.
  • some weight blocks are added to the upper part of the stack tower. These weight blocks are generally made of solid metal materials, mainly because metal materials have better integrity at high temperatures and are not easy to break. For the stack structure of multi-stack towers, the effect of different settlements must be greatly affected by the presence of ballasts.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a sealing structure for the fuel cell stack tower, aim at the cathode open stack, prevent the cathode inlet gas from short-circuiting directly to the outlet, and ensure that the stack The performance is good, not damaged, and the tower still has good sealing performance under different settlement conditions.
  • a sealed structure for a fuel cell stack tower including a preset number of electric stacks, which are arranged in sequence to form a complete hollow cylindrical structure.
  • the center of the cylindrical structure is provided with a cathode outlet gas collector.
  • a first insulating layer is arranged on the top of the cylindrical structure, a weight block is arranged on the first insulating layer, and a first elastic connecting metal plate is arranged on the top surface of the weight block.
  • a heat insulation sealing block between the stacks, a second insulating layer is arranged on the top of the heat insulating sealing block, and a metal plate is arranged on the second insulating layer, the top surface of the metal plate is flush with the top surface of the weight block, and the metal
  • the board is provided with a second elastic connecting metal plate.
  • the first elastic metal plate and the second elastic metal plate form an integral structure, and a metal cover plate is arranged on the top of the first elastic metal plate and the second elastic metal plate to connect with the cathode outlet gas collector.
  • the elasticity of the elastic metal plate can absorb the phenomenon of uneven height between the stack towers caused by the settlement of the stack at high temperature , keep the upper and lower ends of the elastic metal plate well sealed, solve the problem of short circuit between the cathode air intake and cathode outlet air caused by the settlement of the stack, and ensure the stability of the performance of the stack without changing the structure of the stack.
  • both the first insulating layer and the second insulating layer include mica sheets.
  • the mica sheet is made of natural mineral products, it has the characteristics of no pollution, insulation, and good voltage resistance. Natural mica sheets of various specifications can be punched according to requirements, and it has insulation and low-loss thermal resistance functions, so it is especially suitable for Sealing structure for fuel cell stack towers.
  • the mica sheet includes 2-3 layers.
  • the insulation withstand voltage performance of the insulating layer can be ensured to a great extent.
  • the height of the heat-insulating sealing block is 3-5 mm lower than that of the ballast block.
  • the height of the second insulating layer is not less than 3mm.
  • both the first elastic metal plate and the second elastic metal plate are corrugated steel plates.
  • corrugated steel plates as elastic connecting plates is very beneficial to absorb the phenomenon of uneven height among the towers caused by the settlement of the stack at high temperature.
  • the first elastic metal plate and the second elastic metal plate are respectively connected to the weight block, the metal plate and the metal cover plate by welding.
  • the above components are connected to each other by welding, which is beneficial to guarantee the sealing performance of the entire sealing structure.
  • both the first elastic metal plate and the second elastic metal plate are connected to the cathode outlet gas collector by welding.
  • the welding method between the top of the stack and the cathode outlet gas collector is also beneficial to the guarantee of the sealing performance of the entire sealing structure.
  • first insulating layer between the first insulating layer, between the first insulating layer and the weight block, between the second insulating layer, between the second insulating layer and the metal plate, between the second insulating layer
  • a sealant layer is applied between the heat insulation sealing block.
  • the center of the metal cover plate is provided with an installation hole that fits with the outer periphery of the cathode outlet gas collector.
  • the assembly of the entire sealing structure is facilitated by setting a mounting hole in the center of the metal cover plate.
  • the present invention has the advantages that: for the air open electric stack, the elasticity of the elastic metal plate can absorb the phenomenon of uneven height between the towers caused by the settlement of the electric stack at high temperature, and keep The upper and lower end surfaces of the elastic metal plate are well sealed, which solves the problem of short circuit between the cathode air intake and the cathode outlet air caused by the settlement of the stack, and ensures the stability of the performance of the stack without changing the structure of the stack.
  • Fig. 1 schematically shows the first partial structure of the sealing structure of the embodiment of the present invention
  • Fig. 2 schematically shows the overall structure of the sealing structure of the embodiment of the present invention
  • Fig. 3 schematically shows the second structure of the sealing structure of the embodiment of the present invention
  • Fig. 4 schematically shows a kind of structure of the corrugated plate of the embodiment of the present invention
  • Fig. 5 schematically shows another structure of the corrugated plate of the embodiment of the present invention.
  • Fig. 1 schematically shows a first partial structure of a sealing structure 10 according to an embodiment of the present invention.
  • Fig. 2 schematically shows the overall structure of the sealing structure 10 of the embodiment of the present invention.
  • Fig. 3 schematically shows the second partial structure of the sealing structure 10 according to the embodiment of the present invention.
  • Fig. 4 schematically shows a structure of a corrugated board according to an embodiment of the present invention.
  • Fig. 5 schematically shows another structure of the corrugated plate of the embodiment of the present invention.
  • a sealing structure 10 for a fuel cell stack tower includes a preset number of stacks 1 , and the stacks 1 are arranged in sequence to form a complete hollow cylindrical structure.
  • the cathode outlet gas collector 2 is arranged in the center of the cylindrical structure.
  • the top of the cylindrical structure is provided with a first insulating layer 3 , on the first insulating layer 3 is provided a weight block 4 , and on the top surface of the weight block 4 is provided a first elastic connecting metal plate 5 .
  • a heat insulation sealing block 6 is arranged between the electric stacks 1, a second insulating layer 7 is arranged on the top of the heat insulating sealing block 6, a metal plate 8 is arranged on the second insulating layer 7, the top surface of the metal plate 8 and the weight block The top surface of 4 is even, and the second elastic connection metal plate 9 is arranged on the metal plate 8 .
  • the first elastic metal plate 5 and the second elastic metal plate 9 form an integral structure, and a metal cover plate 101 is provided on the top of the first elastic metal plate 5 and the second elastic metal plate 9 to connect with the cathode outlet gas collector 2 .
  • the elasticity of the elastic metal plate can absorb the height unevenness between the stack towers caused by the settlement of the stack at high temperature
  • the phenomenon of keeping the upper and lower ends of the elastic metal plate well sealed solves the problem of short circuit between the cathode air intake and the cathode outlet air caused by the settlement of the stack tower, ensures the stability of the performance of the stack, and does not need to change the structure of the stack.
  • the center of the metal cover plate 101 is provided with an installation hole that matches with the outer periphery of the cathode outlet gas collector 2 .
  • the assembly of the entire sealing structure is facilitated by setting a mounting hole in the center of the metal cover plate.
  • both the first insulating layer 3 and the second insulating layer 7 include mica sheets.
  • the mica sheet is made of natural mineral products, it has the characteristics of no pollution, insulation, and good voltage resistance. Natural mica sheets of various specifications can be punched according to requirements, and it has insulation and low-loss thermal resistance functions, so it is especially suitable for Sealing structure for fuel cell stack towers.
  • the mica sheet includes 2-3 layers. By arranging multi-layer mica sheets, the insulation withstand voltage performance of the insulating layer can be ensured to a great extent.
  • the height of the heat-insulating sealing block 6 is 3-5 mm lower than that of the ballast block 4 .
  • the second insulating layer 7 is not less than 3mm. Setting the thickness dimension of the second insulating layer within the above range can ensure the insulation withstand voltage performance of the insulating layer to a great extent.
  • both the first elastic metal plate 5 and the second elastic metal plate 9 are corrugated steel plates.
  • the use of corrugated steel plates as elastic connecting plates is very beneficial to absorb the phenomenon of uneven height among the towers caused by the settlement of the stack at high temperature.
  • the thickness of the corrugated plate is preferably 3-5 mm, high temperature resistance of 800° C., tensile strength not less than 520 MPa, and yield strength not less than 205 MPa.
  • the corrugated board has a wave-shaped folded structure.
  • the corrugated board can also be a tooth-shaped folding structure.
  • the first elastic metal plate 5 and the second elastic metal plate 9 are respectively connected to the weight block 4 , the metal plate 8 and the metal cover plate 101 by welding.
  • the above components are connected to each other by welding, which is beneficial to guarantee the sealing performance of the entire sealing structure.
  • both the first elastic metal plate 5 and the second elastic metal plate 9 are connected to the cathode outlet gas collector by welding.
  • the welding method between the top of the stack and the cathode outlet gas collector is also beneficial to the guarantee of the sealing performance of the entire sealing structure.
  • the sealing structure used for fuel cell stack towers related to the present invention absorbs the gap between each stack tower due to the settlement of the stack at high temperature through the elasticity of the elastic metal plate.
  • the phenomenon of uneven height between the elastic metal plates keeps the upper and lower ends of the elastic metal plate well sealed, which solves the problem of short circuit between the cathode air intake and the cathode outlet air caused by the settlement of the stack, and ensures the stability of the performance of the stack without changing the stack Structure.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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Abstract

本发明提供一种用于燃料电池堆塔的密封结构，其中筒状结构的中心设有阴极出口集气筒。筒状结构的顶部设有第一绝缘层，第一绝缘层上设有压重块，压重块的顶面设有第一弹性连接金属板。电堆之间设有隔热密封块，隔热密封块的顶部设有第二绝缘层，第二绝缘层上设有金属板，金属板的顶面和压重块的顶面平齐，金属板上设有第二弹性连接金属板。第一弹性金属板和第二弹性金属板形成整体结构，第一弹性金属板和第二弹性金属板顶部设置金属盖板与阴极出口集气筒连接。本发明提供的密封结构，针对阴极开放式电堆，防止阴极进口气体直接短路到出口的密封方式，保证电堆性能良好，不被破坏，并且堆塔在不同沉降的情况下仍然具有良好的密封性能。

Description

一种用于燃料电池堆塔的密封结构
相关申请的交叉引用
本申请要求享有于2021年5月25日提交的名称为“一种用于燃料电池堆塔的密封结构”的中国专利申请CN202110573572.9的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本发明涉及燃料电池发电技术领域，具体涉及一种用于燃料电池堆塔的密封结构。
背景技术
固体氧化物燃料电池由阳极、阴极和电解质组成，阳极为燃料气，采用管道或布气板连接密封供气，阴极一般都为空气或含有空气的氧化性气体。针对阴极采用开放的结构形式，阴极进口和出口之间的密封就显得比较重要，尤其要防止阴极进口和出口气体短路，在运行状态下发生这种情况会导致电堆发电性能的下降，严重的情况会损坏电堆。
电堆在组装的过程中，由于电池片之间的密封胶涂抹不一致的问题，或者电池片，电堆端板之间在高温下膨胀的不同，堆塔之间的高差就会不一致，对圆形布置的堆塔，进口的空气容易直接进入到出口，给发电系统造成预想不到的结果。另外在多堆塔的布置设计过程中，堆塔和堆塔之间总是避免不了使用隔热块，在高温情况下隔热块与堆塔的热膨胀也不同，这种情况也是发生短路的一个风险。而在实际的堆塔装置中，堆塔的上部都要加一些压重块，这些压重块一般都采用实体的金属材料，主要是金属材料在高温下的完整性比较好，不容易断裂。针对多堆塔的电堆结构，沉降不同在压重块存在的情况下效果必定受到很大的影响。
发明内容
本发明要解决的技术问题是克服现有技术的不足，提供一种用于燃料电池堆塔的密封结构，针对阴极开放式电堆，防止阴极进口气体直接短路到出口的密封 方式，保证电堆性能良好，不被破坏，并且堆塔在不同沉降的情况下仍然具有良好的密封性能。
为了解决上述技术问题，本发明提出的技术方案为：
一种用于燃料电池堆塔的密封结构，包括预设数量的电堆，电堆依次相连布置形成完整的中空筒状结构。其中，筒状结构的中心设有阴极出口集气筒。筒状结构的顶部设有第一绝缘层，第一绝缘层上设有压重块，压重块的顶面设有第一弹性连接金属板。电堆之间设有隔热密封块，隔热密封块的顶部设有第二绝缘层，第二绝缘层上设有金属板，金属板的顶面和压重块的顶面平齐，金属板上设有第二弹性连接金属板。第一弹性金属板和第二弹性金属板形成整体结构，第一弹性金属板和第二弹性金属板顶部设置金属盖板与阴极出口集气筒连接。
根据本发明的用于燃料电池堆塔的密封结构，对空气开放电堆来说，通过弹性金属板的弹性，吸收高温下由于电堆的沉降造成的各堆塔之间的高度不均的现象，保持弹性金属板上下端面良好的密封，解决了由于堆塔沉降造成的阴极进气与阴极出气短路的问题，保证了电堆的性能的稳定性，无需改变电堆的结构。
对于上述技术方案，还可进行如下所述的进一步的改进。
根据本发明的用于燃料电池堆塔的密封结构，在一个优选的实施方式中，第一绝缘层和第二绝缘层均包括云母片。
因云母片材质为天然矿制品，具有无污染、绝缘、耐电压性能好的特点，可根据需求冲切各种规格的天然云母片，且有绝缘及低损失的热阻功能，因而特别适用于用于燃料电池堆塔的密封结构。
进一步地，在一个优选的实施方式中，云母片包括2～3层。
通过设置多层云母片，能够极大程度上确保绝缘层的绝缘耐压性能。
具体地，在一个优选的实施方式中，隔热密封块的高度低于压重块高度3～5mm。
通过设置上述结构，便于布置合适厚度的第二绝缘层。
对应地，在一个优选的实施方式中，第二绝缘层的高度不小于3mm。
将第二绝缘层的厚度尺寸设置在上述范围内，能够极大程度上确保绝缘层的绝缘耐压性能。
进一步地，在一个优选的实施方式中，第一弹性金属板和第二弹性金属板均 为波纹板钢板。
采用波纹钢板作为弹性连接板，非常有利于吸收高温下由于电堆的沉降造成的各堆塔之间的高度不均的现象。
具体地，在一个优选的实施方式中，第一弹性金属板和第二弹性金属板均通过焊接的形式分别与压重块、金属板和金属盖板连接。
上述各部件通过焊接的形式互相连接，有利于整个密封结构的密封性能的保证。
具体地，在一个优选的实施方式中，第一弹性金属板和第二弹性金属板均通过焊接的形式与阴极出口集气筒连接。
电堆顶部与阴极出口集气筒之间采用焊接的方式，同样有利于整个密封结构的密封性能的保证。
具体地，在一个优选的实施方式中，第一绝缘层之间、第一绝缘层与压重块之间，第二绝缘层之间、第二绝缘层与金属板之间、第二绝缘层与隔热密封块之间均涂设密封胶层。
通过在各种层面和缝隙之间涂设耐高温密封胶，能够极大程度上确保整个密封结构的密封性能。
具体地，在一个优选的实施方式中，金属盖板中心设有与阴极出口集气筒外周形成配合的安装孔。
通过在金属盖板中心设置安装孔，便于整个密封结构的装配。
相比现有技术，本发明的优点在于：对空气开放电堆来说，通过弹性金属板的弹性，吸收高温下由于电堆的沉降造成的各堆塔之间的高度不均的现象，保持弹性金属板上下端面良好的密封，解决了由于堆塔沉降造成的阴极进气与阴极出气短路的问题，保证了电堆的性能的稳定性，无需改变电堆的结构。
附图说明
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中：
图1示意性显示了本发明实施例的密封结构的第一局部结构；
图2示意性显示了本发明实施例的密封结构的整体结构；
图3示意性显示了本发明实施例的密封结构的第二结构；
图4示意性显示了本发明实施例的波纹板的一种结构；
图5示意性显示了本发明实施例的波纹板的另一种结构。
具体实施方式
下面将结合附图和具体实施例对本发明作进一步详细说明，但并不因此而限制本发明的保护范围。
图1示意性显示了本发明实施例的密封结构10的第一局部结构。图2示意性显示了本发明实施例的密封结构10的整体结构。图3示意性显示了本发明实施例的密封结构10的第二局部结构。图4示意性显示了本发明实施例的波纹板的一种结构。图5示意性显示了本发明实施例的波纹板的另一种结构。
如图1至图3所示，本发明实施例的用于燃料电池堆塔的密封结构10，包括预设数量的电堆1，电堆1依次相连布置形成完整的中空筒状结构。其中，筒状结构的中心设有阴极出口集气筒2。筒状结构的顶部设有第一绝缘层3，第一绝缘层3上设有压重块4，压重块4的顶面设有第一弹性连接金属板5。电堆1之间设有隔热密封块6，隔热密封块6的顶部设有第二绝缘层7，第二绝缘层7上设有金属板8，金属板8的顶面和压重块4的顶面平齐，金属板8上设有第二弹性连接金属板9。第一弹性金属板5和第二弹性金属板9形成整体结构，第一弹性金属板5和第二弹性金属板9顶部设置金属盖板101与阴极出口集气筒2连接。
根据本发明实施例的用于燃料电池堆塔的密封结构，对空气开放电堆来说，通过弹性金属板的弹性，吸收高温下由于电堆的沉降造成的各堆塔之间的高度不均的现象，保持弹性金属板上下端面良好的密封，解决了由于堆塔沉降造成的阴极进气与阴极出气短路的问题，保证了电堆的性能的稳定性，无需改变电堆的结构。
具体地，在本实施例中，金属盖板101中心设有与阴极出口集气筒2外周形成配合的安装孔。通过在金属盖板中心设置安装孔，便于整个密封结构的装配。
具体地，在本实施例中，第一绝缘层3和第二绝缘层7均包括云母片。因云母片材质为天然矿制品，具有无污染、绝缘、耐电压性能好的特点，可根据需求冲切各种规格的天然云母片，且有绝缘及低损失的热阻功能，因而特别适用于用于燃料电池堆塔的密封结构。进一步地，在本实施例中，云母片包括2～3层。通过设置多层云母片，能够极大程度上确保绝缘层的绝缘耐压性能。
具体地，在本实施例中，隔热密封块6的高度低于压重块4高度3～5mm。通过设置上述结构，便于布置合适厚度的第二绝缘层。对应地，在本实施例中，第二绝缘层7的高度不小于3mm。将第二绝缘层的厚度尺寸设置在上述范围内，能够极大程度上确保绝缘层的绝缘耐压性能。
进一步地，在本实施例中，第一弹性金属板5和第二弹性金属板9均为波纹板钢板。采用波纹钢板作为弹性连接板，非常有利于吸收高温下由于电堆的沉降造成的各堆塔之间的高度不均的现象。具体地，在本实施例中，波纹板的厚度优选为3～5mm，耐800℃高温，抗拉强度不小于520MPa，屈服强度不小于205Mpa。具体地，在本实施例中，如图4所示，波纹板为波浪形折叠结构。如图5所示，在本实施例中，波纹板也可以为齿形折叠结构。上述两种结构的波纹板，都能够很好地实现与压重块、金属板和金属盖板之间的弹性连接，且能够确保整个连接结构的稳定可靠。
具体地，在本实施例中，第一弹性金属板5和第二弹性金属板9均通过焊接的形式分别与压重块4、金属板8和金属盖板101连接。上述各部件通过焊接的形式互相连接，有利于整个密封结构的密封性能的保证。具体地，在本实施例中，第一弹性金属板5和第二弹性金属板9均通过焊接的形式与阴极出口集气筒连接。电堆顶部与阴极出口集气筒之间采用焊接的方式，同样有利于整个密封结构的密封性能的保证。
具体地，在本实施例中，第一绝缘层3之间、第一绝缘层3与压重块4之间，第二绝缘层7之间、第二绝缘层7与金属板8之间、第二绝缘层7与隔热密封块6之间均涂设密封胶层。通过在各种层面和缝隙之间涂设耐高温密封胶，能够极大程度上确保整个密封结构的密封性能。
根据上述实施例，可见，本发明涉及的用于燃料电池堆塔的密封结构，对空气开放电堆来说，通过弹性金属板的弹性，吸收高温下由于电堆的沉降造成的各堆塔之间的高度不均的现象，保持弹性金属板上下端面良好的密封，解决了由于堆塔沉降造成的阴极进气与阴极出气短路的问题，保证了电堆的性能的稳定性，无需改变电堆的结构。
虽然已经参考优选实施例对本发明进行了描述，但在不脱离本发明的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起 来。本发明并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (10)

  1. 一种用于燃料电池堆塔的密封结构，其特征在于，包括预设数量的电堆，所述电堆依次相连布置形成完整的中空筒状结构；其中，
    所述筒状结构的中心设有阴极出口集气筒；
    所述筒状结构的顶部设有第一绝缘层，所述第一绝缘层上设有压重块，所述压重块的顶面设有第一弹性连接金属板；
    所述电堆之间设有隔热密封块，所述隔热密封块的顶部设有第二绝缘层，所述第二绝缘层上设有金属板，所述金属板的顶面和所述压重块的顶面平齐，所述金属板上设有第二弹性连接金属板；
    所述第一弹性金属板和所述第二弹性金属板形成整体结构，所述第一弹性金属板和所述第二弹性金属板顶部设置金属盖板与所述阴极出口集气筒连接。
  2. 根据权利要求1所述的用于燃料电池堆塔的密封结构，其特征在于，所述第一绝缘层和所述第二绝缘层均包括云母片。
  3. 根据权利要求2所述的用于燃料电池堆塔的密封结构，其特征在于，所述云母片包括2～3层。
  4. 根据权利要求1至3中任一项所述的用于燃料电池堆塔的密封结构，其特征在于，所述隔热密封块的高度低于所述压重块高度3～5mm。
  5. 根据权利要求4所述的用于燃料电池堆塔的密封结构，其特征在于，所述第二绝缘层的高度不小于3mm。
  6. 根据权利要求1至3中任一项所述的用于燃料电池堆塔的密封结构，其特征在于，所述第一弹性金属板和所述第二弹性金属板均为波纹板钢板。
  7. 根据权利要求1至3中任一项所述的用于燃料电池堆塔的密封结构，其特征在于，所述第一弹性金属板和所述第二弹性金属板均通过焊接的形式分别与所述压重块、所述金属板和所述金属盖板连接。
  8. 根据权利要求1至3中任一项所述的用于燃料电池堆塔的密封结构，其特征在于，所述第一弹性金属板和所述第二弹性金属板均通过焊接的形式与所述所述阴极出口集气筒连接。
  9. 根据权利要求1至3中任一项所述的用于燃料电池堆塔的密封结构，其特征在于，所述第一绝缘层之间、所述第一绝缘层与所述压重块之间，所述第二 绝缘层之间、所述第二绝缘层与所述金属板之间、所述第二绝缘层与所述隔热密封块之间均涂设密封胶层。
  10. 根据权利要求1至3中任一项所述的用于燃料电池堆塔的密封结构，其特征在于，所述金属盖板中心设有与所述阴极出口集气筒外周形成配合的安装孔。
PCT/CN2021/106856 2021-05-25 2021-07-16 一种用于燃料电池堆塔的密封结构 WO2022246988A1 (zh)

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