WO2022056721A1 - Separator and bipolar plate of fuel cell, fuel cell, and manufacturing methods therefor - Google Patents

Separator and bipolar plate of fuel cell, fuel cell, and manufacturing methods therefor Download PDF

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Publication number
WO2022056721A1
WO2022056721A1 PCT/CN2020/115566 CN2020115566W WO2022056721A1 WO 2022056721 A1 WO2022056721 A1 WO 2022056721A1 CN 2020115566 W CN2020115566 W CN 2020115566W WO 2022056721 A1 WO2022056721 A1 WO 2022056721A1
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Prior art keywords
separator
cathode
anode
fuel cell
magnetized
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PCT/CN2020/115566
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French (fr)
Chinese (zh)
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郝小罡
陈必成
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罗伯特·博世有限公司
郝小罡
陈必成
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Application filed by 罗伯特·博世有限公司, 郝小罡, 陈必成 filed Critical 罗伯特·博世有限公司
Priority to CN202090001214.XU priority Critical patent/CN220510065U/en
Priority to PCT/CN2020/115566 priority patent/WO2022056721A1/en
Publication of WO2022056721A1 publication Critical patent/WO2022056721A1/en

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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
    • 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
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a separator for a fuel cell, a method for manufacturing a separator for a fuel cell, a bipolar plate for a fuel cell, a method for manufacturing a bipolar plate, a fuel cell and a A method for manufacturing a fuel cell.
  • proton exchange membrane fuel cells In electric vehicles, fuel cells, especially proton exchange membrane batteries, have received extensive attention as a promising high-efficiency and environmentally friendly power source.
  • Proton exchange membrane fuel cells usually use hydrogen as fuel, oxygen or air as oxidant, and electrochemically convert chemical energy into electricity.
  • solid polymer membranes As electrolytes, proton exchange membrane fuel cells also have the advantages of high energy conversion rate, low temperature start-up, and no electrolyte leakage.
  • a proton exchange membrane fuel cell typically includes a plurality of cells stacked on top of each other.
  • Each cell includes a bipolar plate, an anode diffusion layer, a membrane electrode assembly (MEA), and a cathode diffusion layer, which are in turn stacked on top of each other.
  • the bipolar plates may include cathode separators and anode separators stacked on each other.
  • the object of the present invention is to provide a separator for a fuel cell, a method for manufacturing a separator for a fuel cell, a bipolar plate for a fuel cell, a method for manufacturing a bipolar plate, and a fuel A cell and a method for making a fuel cell to facilitate easier and more accurate alignment between separators or bipolar plates of the fuel cell.
  • a separator for a fuel cell configured as an anode separator or a cathode separator for use as a bipolar plate
  • the separator has: a major surface and a second major surface; at least four through holes through the first major surface and the second major surface, wherein the through holes include an anode fluid inlet, an anode fluid outlet, a cathode fluid inlet, and a cathode fluid outlet; and a flow channel region on the first major surface, grooves for anode fluid or cathode fluid are formed in the flow channel region on the first major surface
  • the separator has a magnetized region integrally formed from a magnetizable material and A non-magnetized region, wherein the magnetized region is magnetized.
  • the magnetized region at least partially surrounds the through hole and/or the flow channel region; and/or the magnetized region is formed at least partially at the bottom of a recess of the separator, the recess being located in the first main at the surface.
  • the through hole further includes a coolant inlet and a coolant outlet
  • the partition plate has a coolant flow channel region on the second major surface, and a groove for the coolant is formed in the coolant flow in the road area.
  • a method for making a separator for a fuel cell comprising : provide a separator having opposing first and second major surfaces; at least four through holes are formed in the separator through the first and second major surfaces; forming grooves for anode fluid or cathode fluid in the channel region; and at least partially magnetizing the separator to form the magnetized region.
  • the step of at least partially magnetizing the separator includes placing the separator at least partially in an external magnetic field, the external magnetic field being generated by a permanent magnet or an electromagnet.
  • the magnetized region is formed to at least partially surround the through hole and/or the flow channel region; and/or the magnetized region is formed at least partially at the bottom of a recess of the separator, the recess located at at the first major surface.
  • a bipolar plate for a fuel cell wherein the bipolar plate comprises an anode separator and a cathode separator stacked on each other, the anode separator and the cathode separator being configured according to the present invention
  • the separator, wherein the magnetized region of the anode separator and the magnetized region of the cathode separator are opposite to each other and have opposite magnetic poles at positions opposite to each other on the second major surface
  • a method for manufacturing a bipolar plate comprising: providing an anode separator and a cathode separator; by means of the magnetized regions of the anode separator and the cathode separator The magnetized regions of the plates stack and align the anode and cathode separators with each other; and connect the anode and cathode separators.
  • a fuel cell wherein the fuel cell comprises an anode diffusion layer, a membrane electrode assembly, a cathode diffusion layer and a bipolar plate according to the present invention stacked on each other.
  • the fuel cell includes a seal arranged between the magnetized region of the separator of the bipolar plate and the membrane electrode assembly.
  • a method for manufacturing a fuel cell comprising the steps of: providing an anode diffusion layer, a membrane electrode assembly, a cathode diffusion layer, and at least two bipolar plates; making Corresponding sections of the at least two bipolar plates are magnetized; and the anode diffusion layer, the membrane electrode assembly, the cathode diffusion layer and the bipolar plates are stacked on each other, wherein, by means of the magnetized sections of the bipolar plates, The at least two bipolar plates are aligned with each other.
  • the positive effect of the present invention is that by magnetizing the separators or bipolar plates to form magnetized regions of the separators or bipolar plates, the alignment between the separators or bipolar plates is correspondingly facilitated and more accurate. According to the present invention, there is no need to attach, glue or embed the magnets in the separator, which in turn makes the separator or bipolar plate easy to manufacture with improved structural stability.
  • FIG. 1 exemplarily shows a schematic diagram of a cell unit of a fuel cell, here a proton exchange membrane fuel cell, according to an embodiment of the present invention
  • Figure 2 exemplarily shows a schematic top view of a separator according to an embodiment of the present invention
  • FIG. 3 exemplarily shows a partial schematic view of a separator according to an embodiment of the present invention
  • Figure 4 exemplarily shows a partial schematic view of a bipolar plate according to an embodiment of the present invention
  • FIG. 5 exemplarily shows two magnetic pole arrangements of the magnetized regions of the anode separator and the cathode separator.
  • FIG. 1 exemplarily shows a schematic diagram of a cell of a fuel cell, here a proton exchange membrane fuel cell, according to an embodiment of the invention.
  • a cell of a proton exchange membrane fuel cell generally includes a bipolar plate 100 , an anode diffusion layer 200 , a membrane electrode assembly (MEA) 300 and a cathode diffusion layer 400 that are stacked in series.
  • the membrane electrode assembly 300 includes an anode catalyst layer 310 , a proton exchange membrane 320 , and a cathode catalyst layer 330 .
  • bipolar plate 100 anode and cathode fluids are introduced and the current produced by the cell is collected.
  • the anode fluid is a fuel gas (hydrogen gas in this example) and the cathode fluid is an oxidant gas (oxygen-containing air in this example).
  • the introduced anode fluid and cathode fluid diffuse at anode diffusion layer 200 and cathode diffusion layer 400, respectively, and are transported to anode catalyst layer 310 and cathode catalyst layer 330, respectively.
  • the fuel gas undergoes an electrochemical reaction at the anode catalyst layer 310.
  • the electrochemical reaction can be represented by the following chemical reaction equation:
  • the generated protons reach the cathode catalyst layer 330 through the proton exchange membrane 320, and undergo an electrochemical reaction with the oxidant at the cathode catalyst layer 330.
  • the electrochemical reaction can be represented by the following chemical reaction equation:
  • the bipolar plate 100 may include two separators 110 stacked on each other, the two separators 110 being an anode separator 110a and a cathode separator 110b, respectively.
  • the anode separator 110a may be disposed adjacent to the anode diffusion layer 200, and the anode fluid channel 120 is formed between the anode separator 110a and the anode diffusion layer 200, and the cathode separator 110b may be in contact with the cathode diffusion layer 400.
  • the cathode fluid channel 130 is formed between the cathode separator 110b and the cathode diffusion layer 400 .
  • the anode separator 110a may, for example, be directly adjacent to the cathode separator 110b, and the coolant channel 140 is formed between the anode separator 110a and the cathode separator 110b.
  • FIG. 2 exemplarily shows a schematic top view of a separator 110 according to an embodiment of the present invention.
  • the separator 110 may be used as an anode separator 110a or a cathode separator 110b. As shown, the separator 110 has: a first major surface 111 and a second major surface 113 (not visible in FIG.
  • the separator 110 has a magnetized region 119 and a non-magnetized region integrally formed from a magnetizable material, wherein the magnetized region 119 is magnetized. The non-magnetized region of the separator 110 is not magnetized.
  • the magnetizable material may include, for example, a magnetizable metallic material or a ferrite material.
  • the spacer 110 may be integrally formed from a magnetizable material and then partially magnetized to form the magnetized region 119 .
  • the magnetized region 119 has magnetism after being magnetized, so that the two separators 110 can attract each other when they are stacked on each other in an appropriate position.
  • the magnetized regions 119 of the two different separators 110 are attracted to each other, which facilitates stacking and correct alignment of the two separators 110 with each other.
  • the magnetized regions 119 that are attracted to each other can provide a certain connecting force. This in turn facilitates keeping the two spacers 110 stacked together in the correct relative position during subsequent steps, such as welding steps.
  • there is no need to attach, glue or embed magnets in the spacer 110, and the spacer 110 with integrally formed magnetized regions 119 and non-magnetized regions is easy to manufacture and has improved structural stability.
  • At least two bipolar plates 100 including two separators 110 respectively are attracted to each other due to the magnetized regions 119, which facilitates stacking and correct alignment of the bipolar plates 100 with each other.
  • the magnetized region 119 at least partially surrounds the through hole and/or the flow channel region 117 .
  • a seal may be disposed at least partially between the magnetized region 119 of the separator 110 and the membrane electrode assembly 300 (as shown in FIG. 1 ).
  • the magnetized regions 119 of the separators 110 of adjacent bipolar plates 100 are attracted to each other, thereby applying pressure to the seal, which facilitates sealing.
  • the magnetized region 119 may be provided in a region of the separator 110 for arranging the seal.
  • FIG. 3 exemplarily shows a partial schematic view of the separator 110 according to an embodiment of the present invention.
  • the separator 110 may have a recess at the first major surface 111 with the magnetized region 119 formed at least partially at the bottom of the recess. Accordingly, the magnetized regions 119 are formed at least partially at the protrusions on the second major surface 113 .
  • the magnetized regions 119 of the two separators 110 may abut each other (as shown in FIG. 4 ).
  • the sealing member when the sealing member is disposed between the magnetized region 119 of the separator 110 and the membrane electrode assembly 300, the sealing member may be located in the recess of the separator 110 (as shown in FIG. 1 ). This facilitates a better sealing effect.
  • the through hole further includes a coolant inlet 115e and a coolant outlet 115f
  • the baffle 110 also has a coolant flow channel region on the second major surface 113 for A groove for the coolant is formed in the coolant flow channel region.
  • the grooves for coolant of two different separators 110 may be arranged opposite each other and form coolant passages 140 (as shown in FIG. 4 ).
  • the magnetization zone 119 facilitates the accurate positioning of the corresponding grooves for coolant of the partitions 110 adjacent to each other with respect to each other.
  • FIG. 4 exemplarily shows a partial schematic view of a bipolar plate 100 according to an embodiment of the present invention.
  • the magnetized regions 119 a of the anode separator 110 a and the magnetized regions 119 b of the cathode separator 110 b are opposite to each other and have opposite magnetic poles at positions opposite to each other of the second main surface 113 .
  • FIG. 5 exemplarily shows two magnetic pole arrangements of the magnetized regions 119b of the anode separator 110a and the cathode separator 110b.
  • the N and S poles may be arranged in a direction substantially perpendicular to the first main surface 111, wherein, in the magnetized region 119a of the anode separator 110a, the N pole is located at the first main surface 111 of the anode separator 110a, and the S pole is located at the first main surface 111 of the anode separator 110a.
  • the poles are located at the second main surface 113, correspondingly in the magnetized region 119b of the cathode separator 110b, the N pole is located at the second main surface 113 of the cathode separator 110b, and the S pole is located at the first main surface 111.
  • the N pole and the S pole may be arranged in a direction substantially parallel to the first main surface 111, wherein the N pole is located more outward of the anode separator 110a relative to the S pole in the magnetized region 119a of the anode separator 110a position, correspondingly in the magnetized region 119b of the cathode separator 110b, the N pole is located at a more inward position of the cathode separator 110b relative to the S pole.
  • the magnetic poles of the magnetized region 119 may also be arranged in other ways as long as the magnetized regions 119a of the anode separator 110a and the magnetized regions 119b of the cathode separator 110b have opposite magnetic poles at positions opposite to each other on the second main surface 113 .
  • the anode separator 110a and the cathode separator 110b are connected together in a fixed manner to each other to form the bipolar plate 100 .
  • the anode separator 110a and the cathode separator 110b may be welded together, for example.
  • the present invention also relates to a method for manufacturing a separator 110 of a fuel cell, the separator 110 being configured to be capable of being used as an anode separator 110a or a cathode separator 110b of the bipolar plate 100, wherein the method comprises the following steps: Describe the steps:
  • Separator 110 is at least partially magnetized to form magnetized regions 119 .
  • the step of forming grooves for anode fluid or cathode fluid can be performed, for example, by a stamping process.
  • the grooves for the coolant are formed in the coolant flow channel region located on the second major surface 113 in the same stamping step that forms the grooves for the anode fluid or the cathode fluid.
  • the step of at least partially magnetizing the separator 110 includes placing the separator 110 at least partially in an external magnetic field, which may be generated by a permanent magnet or an electromagnet.
  • the magnetized region 119 may be formed to at least partially surround the via and/or flow channel region 117 .
  • the magnetized region 119 may be formed at least partially at the bottom of a recess of the separator 110 at the first major surface 111 .
  • the invention also relates to a method for manufacturing a bipolar plate 100 according to the invention, said method comprising the steps of:
  • the anode separator 110a is connected to the cathode separator 110b.
  • the invention also relates to a method for manufacturing a fuel cell, wherein the method comprises the steps of:
  • anode diffusion layer 200 a membrane electrode assembly 300, a cathode diffusion layer 400, and at least two bipolar plates 100;
  • the anode diffusion layer 200 , the membrane electrode assembly 300 , the cathode diffusion layer 400 and the bipolar plate 100 are stacked on top of each other, wherein the at least two bipolar plates 100 are opposite each other by means of the magnetized section of the bipolar plate 100 . allow.
  • the alignment between the bipolar plates is correspondingly easier and more accurate, and there is no need to attach, glue or embed the magnets in the separators, which in turn makes the bipolar plates easy to manufacture with Improved structural stability.
  • the thickness of the magnetized region 119 may be implemented to be greater than, equal to, or less than the thickness of other regions of the separator 110 .

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Abstract

The present invention proposes a separator of a fuel cell, wherein the separator is configured to be an anode separator or a cathode separator capable of being used as a bipolar plate. The separator comprises: a first primary surface and a second primary surface opposite each other; at least four through holes passing through the first primary surface and the second primary surface, wherein the through holes include an anode fluid inlet, an anode fluid outlet, a cathode fluid inlet and a cathode fluid outlet; and a flow channel area on the first primary surface, wherein a groove for an anode fluid or a cathode fluid is formed in the flow channel area on the first primary surface, and the separator comprises a magnetized area which is integrally formed by a magnetizable material and a non-magnetized area, the magnetized area being magnetized. The present invention further relates to a method for manufacturing the separator of the fuel cell, a bipolar plate of the fuel cell, a method for manufacturing the bipolar plate, a fuel cell, and a method for manufacturing the fuel cell. With the present invention, separators or bipolar plates can be aligned more conveniently and accurately.

Description

燃料电池的隔板、双极板和燃料电池及其制造方法Separator, bipolar plate and fuel cell for fuel cell and method of making the same 技术领域technical field
本发明涉及一种燃料电池的隔板、一种用于制造燃料电池的隔板的方法、一种燃料电池的双极板、一种用于制造双极板的方法、一种燃料电池和一种用于制造燃料电池的方法。The present invention relates to a separator for a fuel cell, a method for manufacturing a separator for a fuel cell, a bipolar plate for a fuel cell, a method for manufacturing a bipolar plate, a fuel cell and a A method for manufacturing a fuel cell.
背景技术Background technique
面临全球变暖、大气污染以及能源枯竭的严峻挑战，新能源汽车和节能减排成为汽车产业的当务之急，推动着传统的内燃机汽车向更加绿色环保的新能源电动汽车转型。在电动汽车中，燃料电池、特别是质子交换膜电池作为一种很有前景的高效环保电源受到了广泛关注。质子交换膜燃料电池通常以氢气为燃料，以氧气或空气为氧化剂，通过电化学方式将化学能转化为电能，排放物是水，实现了真正意义上的零排放。而且，由于采用固体聚合物膜作为电解质，质子交换膜燃料电池还具有能量转换率高、低温启动、无电解质泄露等优点。Faced with the severe challenges of global warming, air pollution and energy depletion, new energy vehicles and energy conservation and emission reduction have become the top priorities of the automotive industry, promoting the transformation of traditional internal combustion engine vehicles to more green and environmentally friendly new energy electric vehicles. In electric vehicles, fuel cells, especially proton exchange membrane batteries, have received extensive attention as a promising high-efficiency and environmentally friendly power source. Proton exchange membrane fuel cells usually use hydrogen as fuel, oxygen or air as oxidant, and electrochemically convert chemical energy into electricity. Moreover, due to the use of solid polymer membranes as electrolytes, proton exchange membrane fuel cells also have the advantages of high energy conversion rate, low temperature start-up, and no electrolyte leakage.
质子交换膜燃料电池通常包括彼此堆叠的多个电池单元。每个电池单元包括又彼此堆叠的双极板、阳极扩散层、膜电极组件(MEA)和阴极扩散层。双极板可包括彼此堆叠的阴极隔板和阳极隔板。A proton exchange membrane fuel cell typically includes a plurality of cells stacked on top of each other. Each cell includes a bipolar plate, an anode diffusion layer, a membrane electrode assembly (MEA), and a cathode diffusion layer, which are in turn stacked on top of each other. The bipolar plates may include cathode separators and anode separators stacked on each other.
在双极板和燃料电池的制造过程中，需要将彼此堆叠的部件以正确的位置对准。通常，借助于额外的基准件来实现对准。During the manufacture of bipolar plates and fuel cells, it is necessary to align the parts stacked on each other in the correct position. Usually, alignment is achieved by means of additional fiducials.
然而，现有技术在燃料电池的部件对准的便利性和准确性方面仍然存在不足。However, the prior art still suffers from deficiencies in the ease and accuracy of alignment of the components of the fuel cell.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供一种燃料电池的隔板、一种用于制造燃料电池的隔板的方法、一种燃料电池的双极板、一种用于制造双极板的方法、一种燃料电池和一种用于制造燃料电池的方法，从而使燃料电池的隔板或双 极板之间的对准更便利且更准确。The object of the present invention is to provide a separator for a fuel cell, a method for manufacturing a separator for a fuel cell, a bipolar plate for a fuel cell, a method for manufacturing a bipolar plate, and a fuel A cell and a method for making a fuel cell to facilitate easier and more accurate alignment between separators or bipolar plates of the fuel cell.
根据本发明的第一方面，提供了一种燃料电池的隔板，所述隔板构造成能够用作双极板的阳极隔板或阴极隔板，其中，隔板具有：彼此相反的第一主表面和第二主表面；穿过第一主表面和第二主表面的至少四个通孔，其中，所述通孔包括阳极流体入口、阳极流体出口、阴极流体入口和阴极流体出口；以及位于第一主表面上的流道区，用于阳极流体或阴极流体的凹槽形成在第一主表面上的流道区中，其中，隔板具有由可磁化的材料一体成形的磁化区和非磁化区，其中，所述磁化区被磁化。According to a first aspect of the present invention, there is provided a separator for a fuel cell configured as an anode separator or a cathode separator for use as a bipolar plate, wherein the separator has: a major surface and a second major surface; at least four through holes through the first major surface and the second major surface, wherein the through holes include an anode fluid inlet, an anode fluid outlet, a cathode fluid inlet, and a cathode fluid outlet; and a flow channel region on the first major surface, grooves for anode fluid or cathode fluid are formed in the flow channel region on the first major surface, wherein the separator has a magnetized region integrally formed from a magnetizable material and A non-magnetized region, wherein the magnetized region is magnetized.
根据本发明的一个示例性实施例，磁化区至少部分地环绕通孔和/或流道区；和/或磁化区至少部分地形成在隔板的凹部的底部处，所述凹部位于第一主表面处。According to an exemplary embodiment of the present invention, the magnetized region at least partially surrounds the through hole and/or the flow channel region; and/or the magnetized region is formed at least partially at the bottom of a recess of the separator, the recess being located in the first main at the surface.
根据本发明的一个示例性实施例，通孔还包括冷却剂入口和冷却剂出口，隔板具有位于第二主表面上的冷却剂流道区，用于冷却剂的凹槽形成在冷却剂流道区中。According to an exemplary embodiment of the present invention, the through hole further includes a coolant inlet and a coolant outlet, the partition plate has a coolant flow channel region on the second major surface, and a groove for the coolant is formed in the coolant flow in the road area.
根据本发明的第二方面，提供了一种用于制造燃料电池的隔板的方法，所述隔板构造成能够用作双极板的阳极隔板或阴极隔板，其中，所述方法包括：提供具有相反的第一主表面和第二主表面的隔板；在隔板中形成穿过第一主表面和第二主表面的至少四个通孔；在位于第一主表面上的流道区中形成用于阳极流体或阴极流体的凹槽；以及使隔板至少部分地被磁化，以形成磁化区。According to a second aspect of the present invention, there is provided a method for making a separator for a fuel cell, the separator configured to be capable of being used as an anode separator or a cathode separator of a bipolar plate, wherein the method comprises : provide a separator having opposing first and second major surfaces; at least four through holes are formed in the separator through the first and second major surfaces; forming grooves for anode fluid or cathode fluid in the channel region; and at least partially magnetizing the separator to form the magnetized region.
根据本发明的一个示例性实施例，使隔板至少部分地被磁化的步骤包括将隔板至少部分地置于外部磁场中，所述外部磁场由永磁体或电磁体产生。According to an exemplary embodiment of the present invention, the step of at least partially magnetizing the separator includes placing the separator at least partially in an external magnetic field, the external magnetic field being generated by a permanent magnet or an electromagnet.
根据本发明的一个示例性实施例，磁化区被形成为至少部分地环绕通孔和/或流道区；和/或磁化区至少部分地形成在隔板的凹部的底部处，所述凹部位于第一主表面处。According to an exemplary embodiment of the present invention, the magnetized region is formed to at least partially surround the through hole and/or the flow channel region; and/or the magnetized region is formed at least partially at the bottom of a recess of the separator, the recess located at at the first major surface.
根据本发明的第三方面，提供了一种燃料电池的双极板，其中，所述双极板包括彼此堆叠的阳极隔板和阴极隔板，阳极隔板和阴极隔板构造成根据本发明的隔板，其中，阳极隔板的磁化区和阴极隔板的磁化区彼此相对并且在第二主表面的彼此相对的位置处具有相反的磁极According to a third aspect of the present invention, there is provided a bipolar plate for a fuel cell, wherein the bipolar plate comprises an anode separator and a cathode separator stacked on each other, the anode separator and the cathode separator being configured according to the present invention The separator, wherein the magnetized region of the anode separator and the magnetized region of the cathode separator are opposite to each other and have opposite magnetic poles at positions opposite to each other on the second major surface
根据本发明的第四方面，提供了一种用于制造根据本发明的双极板的方法，所述方法包括：提供阳极隔板和阴极隔板；借助于阳极隔板的磁化区和阴极隔板的磁化区使阳极隔板与阴极隔板彼此堆叠且对准；以及将阳极隔板与阴极隔板连接。According to a fourth aspect of the present invention, there is provided a method for manufacturing a bipolar plate according to the present invention, the method comprising: providing an anode separator and a cathode separator; by means of the magnetized regions of the anode separator and the cathode separator The magnetized regions of the plates stack and align the anode and cathode separators with each other; and connect the anode and cathode separators.
根据本发明的第五方面，提供了一种燃料电池，其中，所述燃料电池包括彼此堆叠的阳极扩散层、膜电极组件、阴极扩散层以及根据本发明的双极板。According to a fifth aspect of the present invention, there is provided a fuel cell, wherein the fuel cell comprises an anode diffusion layer, a membrane electrode assembly, a cathode diffusion layer and a bipolar plate according to the present invention stacked on each other.
根据本发明的一个示例性实施例，燃料电池包括密封件，所述密封件布置在双极板的隔板的磁化区与膜电极组件之间。According to an exemplary embodiment of the present invention, the fuel cell includes a seal arranged between the magnetized region of the separator of the bipolar plate and the membrane electrode assembly.
根据本发明的第六方面，提供了一种用于制造燃料电池的方法，其中，所述方法包括以下步骤：提供阳极扩散层、膜电极组件、阴极扩散层以及至少两个双极板；使所述至少两个双极板的相应的区段被磁化；以及将阳极扩散层、膜电极组件、阴极扩散层以及双极板彼此堆叠，其中，借助于双极板的被磁化的区段，使所述至少两个双极板彼此对准。According to a sixth aspect of the present invention, there is provided a method for manufacturing a fuel cell, wherein the method comprises the steps of: providing an anode diffusion layer, a membrane electrode assembly, a cathode diffusion layer, and at least two bipolar plates; making Corresponding sections of the at least two bipolar plates are magnetized; and the anode diffusion layer, the membrane electrode assembly, the cathode diffusion layer and the bipolar plates are stacked on each other, wherein, by means of the magnetized sections of the bipolar plates, The at least two bipolar plates are aligned with each other.
本发明的积极效果在于：通过使隔板或双极板被磁化以形成隔板或双极板的磁化区，相应地使隔板或双极板之间的对准更便利且更准确。根据本发明，无需将磁体附接、粘接或嵌入隔板中，这进而使得隔板或双极板易于制造且具有改善的结构稳定性。The positive effect of the present invention is that by magnetizing the separators or bipolar plates to form magnetized regions of the separators or bipolar plates, the alignment between the separators or bipolar plates is correspondingly facilitated and more accurate. According to the present invention, there is no need to attach, glue or embed the magnets in the separator, which in turn makes the separator or bipolar plate easy to manufacture with improved structural stability.
附图说明Description of drawings
下面，通过参看附图更详细地描述本发明，可以更好地理解本发明的原理、特点和优点。附图中：The principles, features and advantages of the present invention may be better understood by describing the present invention in more detail below with reference to the accompanying drawings. In the attached picture:
图1示例性地示出了根据本发明的一个实施例的燃料电池、在此为质子交换膜燃料电池的电池单元的示意图；FIG. 1 exemplarily shows a schematic diagram of a cell unit of a fuel cell, here a proton exchange membrane fuel cell, according to an embodiment of the present invention;
图2示例性地示出了根据本发明的一个实施例的隔板的示意性俯视图；Figure 2 exemplarily shows a schematic top view of a separator according to an embodiment of the present invention;
图3示例性地示出了根据本发明的一个实施例的隔板的局部示意图；FIG. 3 exemplarily shows a partial schematic view of a separator according to an embodiment of the present invention;
图4示例性地示出了根据本发明的一个实施例的双极板的局部示意图；Figure 4 exemplarily shows a partial schematic view of a bipolar plate according to an embodiment of the present invention;
图5示例性的示出了阳极隔板和阴极隔板的磁化区的两种磁极布置方式。FIG. 5 exemplarily shows two magnetic pole arrangements of the magnetized regions of the anode separator and the cathode separator.
具体实施方式detailed description
为了使本发明所要解决的技术问题、技术方案以及有益的技术效果更加清楚明白，以下将结合附图以及多个示例性实施例对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用于解释本发明，而不是用于限定本发明的保护范围。In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the protection scope of the present invention.
图1示例性地示出了根据本发明的一个实施例的燃料电池、在此为质子交换膜燃料电池的电池单元的示意图。如图1所示，质子交换膜燃料电池的电池单元通常包括相继堆叠的双极板100、阳极扩散层200、膜电极组件(MEA)300和阴极扩散层400。膜电极组件300包括阳极催化剂层310、质子交换膜320、阴极催化剂层330。在双极板100处，阳极流体和阴极流体被引入并且电池产生的电流被收集。通常，阳极流体为燃料气体(在本实施例中是氢气)，阴极流体为氧化剂气体(在本实施例中是含氧气的空气)。当然，也可采用其它适用的阳极流体和阴极流体。引入的阳极流体和阴极流体分别在阳极扩散层200和阴极扩散层400处扩散并分别传输给阳极催化剂层310和阴极催化剂层330。进而，燃料气体在阳极催化剂层310处进行电化学反应，在本实施例中该电化学反应可以由以下化学反应方程式表示：Figure 1 exemplarily shows a schematic diagram of a cell of a fuel cell, here a proton exchange membrane fuel cell, according to an embodiment of the invention. As shown in FIG. 1 , a cell of a proton exchange membrane fuel cell generally includes a bipolar plate 100 , an anode diffusion layer 200 , a membrane electrode assembly (MEA) 300 and a cathode diffusion layer 400 that are stacked in series. The membrane electrode assembly 300 includes an anode catalyst layer 310 , a proton exchange membrane 320 , and a cathode catalyst layer 330 . At bipolar plate 100, anode and cathode fluids are introduced and the current produced by the cell is collected. Typically, the anode fluid is a fuel gas (hydrogen gas in this example) and the cathode fluid is an oxidant gas (oxygen-containing air in this example). Of course, other suitable anode and cathode fluids may also be employed. The introduced anode fluid and cathode fluid diffuse at anode diffusion layer 200 and cathode diffusion layer 400, respectively, and are transported to anode catalyst layer 310 and cathode catalyst layer 330, respectively. Furthermore, the fuel gas undergoes an electrochemical reaction at the anode catalyst layer 310. In this embodiment, the electrochemical reaction can be represented by the following chemical reaction equation:
Figure PCTCN2020115566-appb-000001
Figure PCTCN2020115566-appb-000001
所产生的质子经质子交换膜320到达阴极催化剂层330，并在阴极催化剂层330处与氧化剂进行电化学反应，在本实施例中该电化学反应可以由以下化学反应方程式表示：The generated protons reach the cathode catalyst layer 330 through the proton exchange membrane 320, and undergo an electrochemical reaction with the oxidant at the cathode catalyst layer 330. In this embodiment, the electrochemical reaction can be represented by the following chemical reaction equation:
Figure PCTCN2020115566-appb-000002
Figure PCTCN2020115566-appb-000002
由此，反应气体的化学能被转化为电能。Thereby, the chemical energy of the reaction gas is converted into electrical energy.
如图1所示，双极板100可包括彼此堆叠的两个隔板110，所述两个隔板110分别为阳极隔板110a和阴极隔板110b。在燃料电池中，阳极隔板110a可与阳极扩散层200相邻地布置，并且在阳极隔板110a与阳极扩散层200之间形成阳极流体通道120，阴极隔板110b可与阴极扩散层400相邻地布置，并且在阴极隔板110b与阴极扩散层400之间形成阴极流体通道130。在双极板100中，阳极隔板110a例如可与阴极隔板110b直接邻接，并在阳极隔板110a与阴极隔板110b之间形成冷却剂通道140。As shown in FIG. 1, the bipolar plate 100 may include two separators 110 stacked on each other, the two separators 110 being an anode separator 110a and a cathode separator 110b, respectively. In the fuel cell, the anode separator 110a may be disposed adjacent to the anode diffusion layer 200, and the anode fluid channel 120 is formed between the anode separator 110a and the anode diffusion layer 200, and the cathode separator 110b may be in contact with the cathode diffusion layer 400. are arranged adjacently, and the cathode fluid channel 130 is formed between the cathode separator 110b and the cathode diffusion layer 400 . In the bipolar plate 100, the anode separator 110a may, for example, be directly adjacent to the cathode separator 110b, and the coolant channel 140 is formed between the anode separator 110a and the cathode separator 110b.
图2示例性地示出了根据本发明的一个实施例的隔板110的示意性俯视图。所述隔板110可用作阳极隔板110a或阴极隔板110b。如图所示，隔板110具有：彼此相反的第一主表面111和第二主表面113(图2中不可见)；穿过第一主表面111和第二主表面113的至少四个通孔，其中，所述通孔包括阳极流体入口115a、阳极流体出口115b、阴极流体入口115c和阴极流体出口115d；以及位于第一主表面111上的流道区117，用于阳极流体或阴极流体的凹槽(为简化起见未在图中示出)形成在第一主表面111上的流道区117中。用于阳极流体或阴极流体的凹槽可分别用于形成阳极流体通道120和阴极流体通道130。隔板110具有由可磁化的材料一体成形的磁化区119和非磁化区，其中，所述磁化区119被磁化。隔板110的非磁化区未被磁化。FIG. 2 exemplarily shows a schematic top view of a separator 110 according to an embodiment of the present invention. The separator 110 may be used as an anode separator 110a or a cathode separator 110b. As shown, the separator 110 has: a first major surface 111 and a second major surface 113 (not visible in FIG. 2 ) that are opposite to each other; holes, wherein the through holes include an anode fluid inlet 115a, an anode fluid outlet 115b, a cathode fluid inlet 115c, and a cathode fluid outlet 115d; and a flow channel region 117 on the first major surface 111 for anode fluid or cathode fluid A groove (not shown in the figure for simplicity) is formed in the flow channel region 117 on the first major surface 111 . Grooves for anode fluid or cathode fluid may be used to form anode fluid channel 120 and cathode fluid channel 130, respectively. The separator 110 has a magnetized region 119 and a non-magnetized region integrally formed from a magnetizable material, wherein the magnetized region 119 is magnetized. The non-magnetized region of the separator 110 is not magnetized.
在本文中，“一体成形”尤其表示由同一坯料加工而成。可磁化的材料例如可包括可磁化的金属材料或铁氧体材料。例如，隔板110可整体地由可磁化的材料一体成形，然后部分地被磁化，以形成磁化区119。磁化区119经过磁化后具有磁性，使得两个隔板110在以适当的位置彼此堆叠时能够相互吸引。In this context, "one-piece forming" especially means being machined from the same blank. The magnetizable material may include, for example, a magnetizable metallic material or a ferrite material. For example, the spacer 110 may be integrally formed from a magnetizable material and then partially magnetized to form the magnetized region 119 . The magnetized region 119 has magnetism after being magnetized, so that the two separators 110 can attract each other when they are stacked on each other in an appropriate position.
在双极板100的制造过程中，两个不同的隔板110的磁化区119相互吸引，有利于将两个隔板110彼此堆叠且正确地对准。彼此吸引的磁化区119可提供一定的连接力。这进而有利于在后续的步骤、例如焊接步骤中，保持所述两个隔板110以正确的相对位置堆叠在一起。根据本发明，无需将磁体附接、粘接或嵌入隔板110中，具有一体成形的磁化区119和非磁化区的隔板110易于制造且具有改善的结构稳定性。During the manufacture of the bipolar plate 100, the magnetized regions 119 of the two different separators 110 are attracted to each other, which facilitates stacking and correct alignment of the two separators 110 with each other. The magnetized regions 119 that are attracted to each other can provide a certain connecting force. This in turn facilitates keeping the two spacers 110 stacked together in the correct relative position during subsequent steps, such as welding steps. According to the present invention, there is no need to attach, glue or embed magnets in the spacer 110, and the spacer 110 with integrally formed magnetized regions 119 and non-magnetized regions is easy to manufacture and has improved structural stability.
在燃料电池的组装过程中，分别包括两个隔板110的至少两个双极板100由于磁化区119而相互吸引，有利于将双极板100彼此堆叠且正确地对准。During assembly of the fuel cell, at least two bipolar plates 100 including two separators 110 respectively are attracted to each other due to the magnetized regions 119, which facilitates stacking and correct alignment of the bipolar plates 100 with each other.
在图2所示的示例性实施例中，磁化区119至少部分地环绕通孔和/或流道区117。在包括根据本发明的隔板110或双极板100的燃料电池中，可将密封件至少部分地布置在隔板110的磁化区119与膜电极组件300之间(如图1所示)。由此，相邻的双极板100的隔板110的磁化区119彼此吸引，从而向密封件施加压力，这有助于密封。换句话说，磁化区119可设 置在隔板110的用于布置密封件的区域中。In the exemplary embodiment shown in FIG. 2 , the magnetized region 119 at least partially surrounds the through hole and/or the flow channel region 117 . In a fuel cell comprising a separator 110 or bipolar plate 100 according to the present invention, a seal may be disposed at least partially between the magnetized region 119 of the separator 110 and the membrane electrode assembly 300 (as shown in FIG. 1 ). Thereby, the magnetized regions 119 of the separators 110 of adjacent bipolar plates 100 are attracted to each other, thereby applying pressure to the seal, which facilitates sealing. In other words, the magnetized region 119 may be provided in a region of the separator 110 for arranging the seal.
图3示例性地示出了根据本发明的一个实施例的隔板110的局部示意图。如图3所示，隔板110可具有位于第一主表面111处的凹部，磁化区119至少部分地形成在凹部的底部处。相应地，磁化区119至少部分地形成在第二主表面113上的凸起处。由此，当两个隔板110以第二主表面113面向彼此的方式堆叠时，这有利于使所述两个隔板110的磁化区119彼此邻接(如图4所示)。另外，当将密封件布置在隔板110的磁化区119与膜电极组件300之间时，密封件可位于隔板110的凹部中(如图1所示)。这有利于实现更好的密封效果。FIG. 3 exemplarily shows a partial schematic view of the separator 110 according to an embodiment of the present invention. As shown in FIG. 3 , the separator 110 may have a recess at the first major surface 111 with the magnetized region 119 formed at least partially at the bottom of the recess. Accordingly, the magnetized regions 119 are formed at least partially at the protrusions on the second major surface 113 . Thus, when the two separators 110 are stacked with the second major surfaces 113 facing each other, it is advantageous for the magnetized regions 119 of the two separators 110 to abut each other (as shown in FIG. 4 ). In addition, when the sealing member is disposed between the magnetized region 119 of the separator 110 and the membrane electrode assembly 300, the sealing member may be located in the recess of the separator 110 (as shown in FIG. 1 ). This facilitates a better sealing effect.
在图2和图3所示的示例性实施例中，通孔还包括冷却剂入口115e和冷却剂出口115f，隔板110还具有位于第二主表面113上的冷却剂流道区，用于冷却剂的凹槽形成在冷却剂流道区中。两个不同的隔板110的用于冷却剂的凹槽可布置成彼此相对并形成冷却剂通道140(如图4所示)。磁化区119有利于使彼此邻接的隔板110的相应的用于冷却剂的凹槽相对于彼此准确地定位。In the exemplary embodiment shown in FIGS. 2 and 3 , the through hole further includes a coolant inlet 115e and a coolant outlet 115f, and the baffle 110 also has a coolant flow channel region on the second major surface 113 for A groove for the coolant is formed in the coolant flow channel region. The grooves for coolant of two different separators 110 may be arranged opposite each other and form coolant passages 140 (as shown in FIG. 4 ). The magnetization zone 119 facilitates the accurate positioning of the corresponding grooves for coolant of the partitions 110 adjacent to each other with respect to each other.
图4示例性地示出了根据本发明的一个实施例的双极板100的局部示意图。如图4所示，阳极隔板110a的磁化区119a和阴极隔板110b的磁化区119b彼此相对并且在第二主表面113的彼此相对的位置处具有相反的磁极。图5示例性的示出了阳极隔板110a和阴极隔板110b的磁化区119b的两种磁极布置方式。例如，N极和S极可沿大致垂直于第一主表面111的方向排列，其中，在阳极隔板110a的磁化区119a中，N极位于阳极隔板110a的第一主表面111处，S极位于第二主表面113处，相应地在阴极隔板110b的磁化区119b中，N极位于阴极隔板110b的第二主表面113处，S极位于第一主表面111处。例如，N极和S极可沿大致平行于第一主表面111的方向排列，其中，在阳极隔板110a的磁化区119a中，N极相对于S极位于阳极隔板110a的更向外的位置处，相应地在阴极隔板110b的磁化区119b中，N极相对于S极位于阴极隔板110b的更向内的位置处。磁化区119的磁极也可以其它方式布置，只要满足阳极隔板110a的磁化区119a和阴极隔板110b的磁化区119b在第二主表面113的彼此相对的位置处具有相反的磁极。FIG. 4 exemplarily shows a partial schematic view of a bipolar plate 100 according to an embodiment of the present invention. As shown in FIG. 4 , the magnetized regions 119 a of the anode separator 110 a and the magnetized regions 119 b of the cathode separator 110 b are opposite to each other and have opposite magnetic poles at positions opposite to each other of the second main surface 113 . FIG. 5 exemplarily shows two magnetic pole arrangements of the magnetized regions 119b of the anode separator 110a and the cathode separator 110b. For example, the N and S poles may be arranged in a direction substantially perpendicular to the first main surface 111, wherein, in the magnetized region 119a of the anode separator 110a, the N pole is located at the first main surface 111 of the anode separator 110a, and the S pole is located at the first main surface 111 of the anode separator 110a. The poles are located at the second main surface 113, correspondingly in the magnetized region 119b of the cathode separator 110b, the N pole is located at the second main surface 113 of the cathode separator 110b, and the S pole is located at the first main surface 111. For example, the N pole and the S pole may be arranged in a direction substantially parallel to the first main surface 111, wherein the N pole is located more outward of the anode separator 110a relative to the S pole in the magnetized region 119a of the anode separator 110a position, correspondingly in the magnetized region 119b of the cathode separator 110b, the N pole is located at a more inward position of the cathode separator 110b relative to the S pole. The magnetic poles of the magnetized region 119 may also be arranged in other ways as long as the magnetized regions 119a of the anode separator 110a and the magnetized regions 119b of the cathode separator 110b have opposite magnetic poles at positions opposite to each other on the second main surface 113 .
在根据本发明的一个实施例中，阳极隔板110a和阴极隔板110b以彼此固定的方式连接在一起，以形成双极板100。阳极隔板110a和阴极隔板110b例如可以被焊接在一起。In one embodiment according to the present invention, the anode separator 110a and the cathode separator 110b are connected together in a fixed manner to each other to form the bipolar plate 100 . The anode separator 110a and the cathode separator 110b may be welded together, for example.
本发明还涉及一种用于制造燃料电池的隔板110的方法，所述隔板110构造成能够用作双极板100的阳极隔板110a或阴极隔板110b，其中，所述方法包括下述步骤：The present invention also relates to a method for manufacturing a separator 110 of a fuel cell, the separator 110 being configured to be capable of being used as an anode separator 110a or a cathode separator 110b of the bipolar plate 100, wherein the method comprises the following steps: Describe the steps:
提供具有相反的第一主表面111和第二主表面113的隔板110；providing a spacer 110 having opposing first major surfaces 111 and second major surfaces 113;
在隔板110中形成穿过第一主表面111和第二主表面113的至少四个通孔；forming at least four through holes through the first main surface 111 and the second main surface 113 in the separator 110;
在位于第一主表面111上的流道区117中形成用于阳极流体或阴极流体的凹槽；以及forming grooves for anode fluid or cathode fluid in flow channel region 117 on first major surface 111; and
使隔板110至少部分地被磁化，以形成磁化区119。 Separator 110 is at least partially magnetized to form magnetized regions 119 .
应理解，上述步骤的执行顺序不受上文对步骤的描述的顺序所限，而是上述步骤中的至少一部分可以以其它的顺序执行。It should be understood that the execution order of the above steps is not limited by the order of the steps described above, but at least a part of the above steps may be executed in other sequences.
形成用于阳极流体或阴极流体的凹槽的步骤例如可通过冲压工艺来执行。例如，在形成用于阳极流体或阴极流体的凹槽的同一冲压步骤中，在位于第二主表面113上的冷却剂流道区中形成用于冷却剂的凹槽。The step of forming grooves for anode fluid or cathode fluid can be performed, for example, by a stamping process. For example, the grooves for the coolant are formed in the coolant flow channel region located on the second major surface 113 in the same stamping step that forms the grooves for the anode fluid or the cathode fluid.
在一个示例性实施例中，使隔板110至少部分地被磁化的步骤包括将隔板110至少部分地置于外部磁场中，所述外部磁场可由永磁体或电磁体产生。例如，磁化区119可被形成为至少部分地环绕通孔和/或流道区117。替代地或附加地，磁化区119可至少部分地形成在隔板110的凹部的底部处，所述凹部位于第一主表面111处。In one exemplary embodiment, the step of at least partially magnetizing the separator 110 includes placing the separator 110 at least partially in an external magnetic field, which may be generated by a permanent magnet or an electromagnet. For example, the magnetized region 119 may be formed to at least partially surround the via and/or flow channel region 117 . Alternatively or additionally, the magnetized region 119 may be formed at least partially at the bottom of a recess of the separator 110 at the first major surface 111 .
本发明还涉及一种用于制造根据本发明的双极板100的方法，所述方法包括下述步骤：The invention also relates to a method for manufacturing a bipolar plate 100 according to the invention, said method comprising the steps of:
提供阳极隔板110a和阴极隔板110b；providing an anode separator 110a and a cathode separator 110b;
借助于阳极隔板110a的磁化区119a和阴极隔板110b的磁化区119b使阳极隔板110a与阴极隔板110b彼此堆叠且对准；以及stacking and aligning the anode separator 110a and the cathode separator 110b with each other by means of the magnetized region 119a of the anode separator 110a and the magnetized region 119b of the cathode separator 110b; and
将阳极隔板110a与阴极隔板110b连接。The anode separator 110a is connected to the cathode separator 110b.
本发明还涉及一种用于制造燃料电池的方法，其中，所述方法包括以下步骤：The invention also relates to a method for manufacturing a fuel cell, wherein the method comprises the steps of:
提供阳极扩散层200、膜电极组件300、阴极扩散层400以及至少两个双极板100；providing an anode diffusion layer 200, a membrane electrode assembly 300, a cathode diffusion layer 400, and at least two bipolar plates 100;
使所述至少两个双极板100的相应的区段被磁化；magnetizing respective segments of the at least two bipolar plates 100;
将阳极扩散层200、膜电极组件300、阴极扩散层400以及双极板100彼此堆叠，其中，借助于双极板100的被磁化的区段，使所述至少两个双极板100彼此对准。The anode diffusion layer 200 , the membrane electrode assembly 300 , the cathode diffusion layer 400 and the bipolar plate 100 are stacked on top of each other, wherein the at least two bipolar plates 100 are opposite each other by means of the magnetized section of the bipolar plate 100 . allow.
通过使双极板被磁化，相应地使双极板之间的对准更便利且更准确，并且无需将磁体附接、粘接或嵌入隔板中，这进而使得双极板易于制造且具有改善的结构稳定性。By having the bipolar plates magnetized, the alignment between the bipolar plates is correspondingly easier and more accurate, and there is no need to attach, glue or embed the magnets in the separators, which in turn makes the bipolar plates easy to manufacture with Improved structural stability.
应理解，虽然在附图中对磁化区119进行加粗以更清楚地示出磁化区119，但磁化区119的厚度可实施成大于、等于或小于隔板110的其它区域的厚度。It should be understood that although the magnetized region 119 is bolded in the figures to more clearly show the magnetized region 119 , the thickness of the magnetized region 119 may be implemented to be greater than, equal to, or less than the thickness of other regions of the separator 110 .
尽管这里详细描述了本发明的特定实施方式，但它们仅仅是为了解释的目的而给出的，而不应认为它们对本发明的范围构成限制。在不脱离本发明精神和范围的前提下，各种替换、变更和改造可被构想出来。Although specific embodiments of the present invention are described in detail herein, they are presented for purposes of explanation only and should not be considered as limiting the scope of the invention. Various substitutions, alterations and modifications may be devised without departing from the spirit and scope of the present invention.
附图标记列表List of reference signs
100    双极板100 bipolar plates
110    隔板110 Partition
110a   阳极隔板110a Anode separator
110b   阴极隔板110b Cathode Separator
111    第一主表面111 first main surface
113    第二主表面113 Second main surface
115a   阳极流体入口115a Anode fluid inlet
115b   阳极流体出口115b Anode fluid outlet
115c   阴极流体入口115c Cathode Fluid Inlet
115d   阴极流体出口115d Cathode fluid outlet
115e   冷却剂入口115e Coolant inlet
115f   冷却剂出口115f Coolant outlet
117    流道区117 runner area
119    磁化区119 Magnetized area
119a   阳极隔板的磁化区119a Magnetized region of anode separator
119b   阴极隔板的磁化区119b The magnetized region of the cathode separator
120    阳极流体通道120 Anode Fluid Channels
130    阴极流体通道130 Cathode Fluid Channels
140    冷却剂通道140 Coolant Channels
200    阳极扩散层200 Anode Diffusion Layer
300    膜电极组件300 membrane electrode assemblies
310    阳极催化剂层310 Anode catalyst layer
320    质子交换膜320 Proton exchange membrane
330    阴极催化剂层330 Cathode catalyst layer
400    阴极扩散层400 Cathode Diffusion Layer
500    密封件500 seals

Claims (11)

  1. 一种燃料电池的隔板(110)，所述隔板(110)构造成能够用作双极板(100)的阳极隔板(110a)或阴极隔板(110b)，其中，隔板(110)具有：A separator (110) for a fuel cell, the separator (110) configured to be capable of serving as an anode separator (110a) or a cathode separator (110b) of a bipolar plate (100), wherein the separator (110) )have:
    彼此相反的第一主表面(111)和第二主表面(113)；a first major surface (111) and a second major surface (113) opposite each other;
    穿过第一主表面(111)和第二主表面(113)的至少四个通孔，其中，所述通孔包括阳极流体入口(115a)、阳极流体出口(115b)、阴极流体入口(115c)和阴极流体出口(115d)；以及At least four through holes through the first main surface (111) and the second main surface (113), wherein the through holes include an anode fluid inlet (115a), an anode fluid outlet (115b), a cathode fluid inlet (115c) ) and cathode fluid outlet (115d); and
    位于第一主表面(111)上的流道区(117)，用于阳极流体或阴极流体的凹槽形成在第一主表面(111)上的流道区(117)中，a flow channel region (117) on the first major surface (111), grooves for anode fluid or cathode fluid are formed in the flow channel region (117) on the first major surface (111),
    其中，隔板(110)具有由可磁化的材料一体成形的磁化区(119)和非磁化区，其中，所述磁化区(119)被磁化。The separator (110) has a magnetized region (119) and a non-magnetized region integrally formed from a magnetizable material, wherein the magnetized region (119) is magnetized.
  2. 根据权利要求1所述的隔板(110)，其中，The separator (110) of claim 1, wherein
    磁化区(119)至少部分地环绕通孔和/或流道区(117)；和/或a magnetized region (119) at least partially surrounding the through hole and/or the flow channel region (117); and/or
    磁化区(119)至少部分地形成在隔板(110)的凹部的底部处，所述凹部位于第一主表面(111)处。A magnetized region (119) is formed at least partially at the bottom of a recess of the separator (110), the recess being located at the first major surface (111).
  3. 根据权利要求1或2所述的隔板(110)，其中，The separator (110) according to claim 1 or 2, wherein,
    通孔还包括冷却剂入口(115e)和冷却剂出口(115f)，隔板(110)具有位于第二主表面(113)上的冷却剂流道区，用于冷却剂的凹槽形成在冷却剂流道区中。The through hole also includes a coolant inlet (115e) and a coolant outlet (115f), the partition plate (110) has a coolant flow channel region on the second main surface (113), and grooves for coolant are formed in the cooling in the agent flow area.
  4. 一种用于制造燃料电池的隔板(110)的方法，所述隔板(110)构造成能够用作双极板(100)的阳极隔板(110a)或阴极隔板(110b)，其中，所述方法包括：A method for manufacturing a separator (110) for a fuel cell, the separator (110) configured to be capable of being used as an anode separator (110a) or a cathode separator (110b) of a bipolar plate (100), wherein , the method includes:
    提供具有相反的第一主表面(111)和第二主表面(113)的隔板(110)；providing a separator (110) having opposing first major surfaces (111) and second major surfaces (113);
    在隔板(110)中形成穿过第一主表面(111)和第二主表面(113)的至少四个通孔；at least four through holes are formed in the separator (110) through the first main surface (111) and the second main surface (113);
    在位于第一主表面(111)上的流道区(117)中形成用于阳极流体或阴极流体的凹槽；以及forming grooves for anode fluid or cathode fluid in the flow channel region (117) on the first major surface (111); and
    使隔板(110)至少部分地被磁化，以形成磁化区(119)。The separator (110) is at least partially magnetized to form a magnetized region (119).
  5. 根据权利要求4所述的方法，其中，The method of claim 4, wherein,
    使隔板(110)至少部分地被磁化的步骤包括将隔板(110)至少部分地置于外部磁场中，所述外部磁场由永磁体或电磁体产生。The step of at least partially magnetizing the separator (110) includes placing the separator (110) at least partially in an external magnetic field, the external magnetic field being generated by a permanent magnet or an electromagnet.
  6. 根据权利要求4所述的方法，其中，The method of claim 4, wherein,
    磁化区(119)被形成为至少部分地环绕通孔和/或流道区(117)；和/或a magnetized region (119) formed to at least partially surround the through hole and/or the flow channel region (117); and/or
    磁化区(119)至少部分地形成在隔板(110)的凹部的底部处，所述凹部位于第一主表面(111)处。A magnetized region (119) is formed at least partially at the bottom of a recess of the separator (110), the recess being located at the first major surface (111).
  7. 一种燃料电池的双极板(100)，其中，所述双极板(100)包括彼此堆叠的阳极隔板(110a)和阴极隔板(110b)，阳极隔板(110a)和阴极隔板(110b)构造成根据权利要求1-3中任一项所述的隔板(110)，其中，阳极隔板(110a)的磁化区(119)和阴极隔板(110b)的磁化区(119)彼此相对并且在第二主表面(113)的彼此相对的位置处具有相反的磁极。A bipolar plate (100) for a fuel cell, wherein the bipolar plate (100) comprises an anode separator (110a) and a cathode separator (110b) stacked on each other, the anode separator (110a) and the cathode separator (110b) is configured as the separator (110) of any one of claims 1-3, wherein the magnetized region (119) of the anode separator (110a) and the magnetized region (119) of the cathode separator (110b) ) are opposite each other and have opposite magnetic poles at opposite positions of the second major surface (113).
  8. 一种用于制造根据权利要求7所述的双极板(100)的方法，所述方法包括：A method for manufacturing a bipolar plate (100) according to claim 7, the method comprising:
    提供阳极隔板(110a)和阴极隔板(110b)；providing an anode separator (110a) and a cathode separator (110b);
    借助于阳极隔板(110a)的磁化区(119)和阴极隔板(110b)的磁化区(119)使阳极隔板(110a)与阴极隔板(110b)彼此堆叠且对准；以及stacking and aligning the anode separator (110a) and the cathode separator (110b) with each other by means of the magnetized region (119) of the anode separator (110a) and the magnetized region (119) of the cathode separator (110b); and
    将阳极隔板(110a)与阴极隔板(110b)连接。The anode separator (110a) is connected to the cathode separator (110b).
  9. 一种燃料电池，其中，所述燃料电池包括彼此堆叠的阳极扩散层(200)、膜电极组件(300)、阴极扩散层(400)以及根据权利要求7所述的双极板(100)。A fuel cell, wherein the fuel cell comprises an anode diffusion layer (200), a membrane electrode assembly (300), a cathode diffusion layer (400) and a bipolar plate (100) according to claim 7 stacked on each other.
  10. 根据权利要求9所述的燃料电池，其中，The fuel cell of claim 9, wherein,
    燃料电池包括密封件，所述密封件布置在双极板(100)的隔板(110)的磁化区(119)与膜电极组件(300)之间。The fuel cell includes a seal arranged between the magnetized region (119) of the separator (110) of the bipolar plate (100) and the membrane electrode assembly (300).
  11. 一种用于制造燃料电池的方法，其中，所述方法包括以下步骤：A method for manufacturing a fuel cell, wherein the method comprises the steps of:
    提供阳极扩散层(200)、膜电极组件(300)、阴极扩散层(400)以及至少两个双极板(100)；providing an anode diffusion layer (200), a membrane electrode assembly (300), a cathode diffusion layer (400), and at least two bipolar plates (100);
    使所述至少两个双极板(100)的相应的区段被磁化；以及magnetizing respective segments of the at least two bipolar plates (100); and
    将阳极扩散层(200)、膜电极组件(300)、阴极扩散层(400)以及双极板(100)彼此堆叠，其中，借助于双极板(100)的被磁化的区段，使所述至少两个双极板(100)彼此对准。The anode diffusion layer (200), the membrane electrode assembly (300), the cathode diffusion layer (400) and the bipolar plate (100) are stacked on top of each other, wherein by means of the magnetized section of the bipolar plate (100), all The at least two bipolar plates (100) are aligned with each other.
PCT/CN2020/115566 2020-09-16 2020-09-16 Separator and bipolar plate of fuel cell, fuel cell, and manufacturing methods therefor WO2022056721A1 (en)

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