WO2022056721A1 - Séparateur et plaque bipolaire de pile à combustible, pile à combustible et procédés de fabrication associés - Google Patents

Séparateur et plaque bipolaire de pile à combustible, pile à combustible et procédés de fabrication associés Download PDF

Info

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
Authority
WO
WIPO (PCT)
Prior art keywords
separator
cathode
anode
fuel cell
magnetized
Prior art date
Application number
PCT/CN2020/115566
Other languages
English (en)
Chinese (zh)
Inventor
郝小罡
陈必成
Original Assignee
罗伯特·博世有限公司
郝小罡
陈必成
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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/zh
Priority to PCT/CN2020/115566 priority patent/WO2022056721A1/fr
Publication of WO2022056721A1 publication Critical patent/WO2022056721A1/fr

Links

Images

Classifications

    • 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 .

Landscapes

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

Abstract

La présente invention propose un séparateur d'une pile à combustible, le séparateur étant conçu pour être un séparateur d'anode ou un séparateur de cathode pouvant être utilisé en tant que plaque bipolaire. Le séparateur comprend : une première surface primaire et une seconde surface primaire opposées l'une à l'autre ; au moins quatre trous traversants passant à travers la première surface primaire et la seconde surface primaire, les trous traversants comprenant une entrée de fluide d'anode, une sortie de fluide d'anode, une entrée de fluide de cathode et une sortie de fluide de cathode ; et une zone de canal d'écoulement sur la première surface primaire, une rainure pour un fluide d'anode ou un fluide de cathode étant formée dans la zone de canal d'écoulement sur la première surface primaire, et le séparateur comprend une zone magnétisée qui est formée d'un seul tenant par un matériau magnétisable et une zone non magnétisée, la zone magnétisée étant magnétisée. La présente invention concerne en outre un procédé de fabrication du séparateur de la pile à combustible, une plaque bipolaire de la pile à combustible, un procédé de fabrication de la plaque bipolaire, une pile à combustible et un procédé de fabrication de la pile à combustible. Grâce à la présente invention, des séparateurs ou des plaques bipolaires peuvent être alignés de manière plus commode et plus précise.
PCT/CN2020/115566 2020-09-16 2020-09-16 Séparateur et plaque bipolaire de pile à combustible, pile à combustible et procédés de fabrication associés WO2022056721A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202090001214.XU CN220510065U (zh) 2020-09-16 2020-09-16 燃料电池的隔板、双极板和燃料电池
PCT/CN2020/115566 WO2022056721A1 (fr) 2020-09-16 2020-09-16 Séparateur et plaque bipolaire de pile à combustible, pile à combustible et procédés de fabrication associés

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/115566 WO2022056721A1 (fr) 2020-09-16 2020-09-16 Séparateur et plaque bipolaire de pile à combustible, pile à combustible et procédés de fabrication associés

Publications (1)

Publication Number Publication Date
WO2022056721A1 true WO2022056721A1 (fr) 2022-03-24

Family

ID=80777500

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/115566 WO2022056721A1 (fr) 2020-09-16 2020-09-16 Séparateur et plaque bipolaire de pile à combustible, pile à combustible et procédés de fabrication associés

Country Status (2)

Country Link
CN (1) CN220510065U (fr)
WO (1) WO2022056721A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022101387B4 (de) 2022-01-21 2024-06-06 Audi Aktiengesellschaft Brennstoffzelle, Brennstoffzellenstapel sowieBrennstoffzellen-Fahrzeug

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005011720A (ja) * 2003-06-19 2005-01-13 Nissan Motor Co Ltd 燃料電池用セパレータ、燃料電池及びこれらの製造方法並びに燃料電池車両
JP3719419B2 (ja) * 2002-02-01 2005-11-24 日産自動車株式会社 燃料電池
JP2007087862A (ja) * 2005-09-26 2007-04-05 Equos Research Co Ltd 燃料電池のセル及びスタック
JP2007242532A (ja) * 2006-03-10 2007-09-20 Toyota Motor Corp 燃料電池及びその製造方法
CN110137530A (zh) * 2019-03-22 2019-08-16 清华大学 一种氢燃料电池电堆磁流体密封装置
KR20200068122A (ko) * 2018-12-04 2020-06-15 한국자동차연구원 연료전지용 셀

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3719419B2 (ja) * 2002-02-01 2005-11-24 日産自動車株式会社 燃料電池
JP2005011720A (ja) * 2003-06-19 2005-01-13 Nissan Motor Co Ltd 燃料電池用セパレータ、燃料電池及びこれらの製造方法並びに燃料電池車両
JP2007087862A (ja) * 2005-09-26 2007-04-05 Equos Research Co Ltd 燃料電池のセル及びスタック
JP2007242532A (ja) * 2006-03-10 2007-09-20 Toyota Motor Corp 燃料電池及びその製造方法
KR20200068122A (ko) * 2018-12-04 2020-06-15 한국자동차연구원 연료전지용 셀
CN110137530A (zh) * 2019-03-22 2019-08-16 清华大学 一种氢燃料电池电堆磁流体密封装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022101387B4 (de) 2022-01-21 2024-06-06 Audi Aktiengesellschaft Brennstoffzelle, Brennstoffzellenstapel sowieBrennstoffzellen-Fahrzeug

Also Published As

Publication number Publication date
CN220510065U (zh) 2024-02-20

Similar Documents

Publication Publication Date Title
CN110380077B (zh) 一种组合式流道燃料电池双极板
CN109904484B (zh) 一种燃料电池双极板结构及燃料电池
US7309542B2 (en) Membrane electrode assembly and fuel cell
US11784326B2 (en) Fuel cell, bipolar plate and bipolar plate assembly for fuel cell
CN108172857B (zh) 一种支持高电流密度放电的燃料电池电堆流场板
US7081316B2 (en) Bipolar plate assembly having transverse legs
CN211062790U (zh) 质子交换膜燃料电池高性能流场双极板
WO2022056721A1 (fr) Séparateur et plaque bipolaire de pile à combustible, pile à combustible et procédés de fabrication associés
KR20130057716A (ko) 고분자 전해질 연료전지용 분리판 및 이것을 이용한 고분자 전해질 연료전지
KR100953273B1 (ko) 연료전지용 금속 분리판 및 이를 구비하는 연료전지 스택
CN113451601B (zh) 一种阴极开放式空冷燃料电池双极板及其电池电堆
KR101491377B1 (ko) 연료 전지
CN111640961A (zh) 一种燃料电池模块和燃料电池堆
CN108134109B (zh) 一种燃料电池的双极板结构
US8501363B2 (en) Bipolar plate design with improved freeze start-up
CN215680730U (zh) 一种燃料电池单元模块和燃料电池
KR20220083742A (ko) 연료 전지
CN112599810B (zh) 一种嵌合式燃料电池水冷电堆极板和膜电极
CN216389443U (zh) 一种燃料电池阴极开放式金属双极板及无人机
CN220341265U (zh) 单电池、燃料电池堆及车辆
CN112635784B (zh) 一种嵌合式空冷燃料电池电堆极板和膜电极
CN215680726U (zh) 一种紧凑型燃料电池单元模块和燃料电池
CN221102139U (zh) 单电池以及液流电池
CN215184078U (zh) 一种燃料电池双极板及其电池电堆
CN217955902U (zh) 极板、双极板、燃料电池和车辆

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20953579

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202090001214.X

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20953579

Country of ref document: EP

Kind code of ref document: A1