WO2024036558A1 - Flow field plate and manufacturing method therefor, and bipolar plate and manufacturing method therefor - Google Patents

Flow field plate and manufacturing method therefor, and bipolar plate and manufacturing method therefor Download PDF

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Publication number
WO2024036558A1
WO2024036558A1 PCT/CN2022/113295 CN2022113295W WO2024036558A1 WO 2024036558 A1 WO2024036558 A1 WO 2024036558A1 CN 2022113295 W CN2022113295 W CN 2022113295W WO 2024036558 A1 WO2024036558 A1 WO 2024036558A1
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WO
WIPO (PCT)
Prior art keywords
flow field
pattern
plate
ridge
metal plate
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PCT/CN2022/113295
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French (fr)
Chinese (zh)
Inventor
郝小罡
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罗伯特·博世有限公司
郝小罡
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Application filed by 罗伯特·博世有限公司, 郝小罡 filed Critical 罗伯特·博世有限公司
Priority to PCT/CN2022/113295 priority Critical patent/WO2024036558A1/en
Publication of WO2024036558A1 publication Critical patent/WO2024036558A1/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
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
    • 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 present application relates generally to fuel cell technology, and in particular to flow field plates, bipolar plates for fuel cells, and methods of manufacturing the same.
  • Fuel cells which use the electrochemical reaction of fuel and oxidant to generate electricity, are increasingly used to provide electricity, especially in the field of electric vehicles.
  • the proton exchange membrane fuel cell is a widely used fuel cell that uses hydrogen as fuel and oxygen as oxidant.
  • a membrane electrode assembly (MEA) is disposed between two flow field plates to form a fuel cell unit.
  • the two flow field plates serve as cathode plates and anode plates respectively, and include flow fields for supplying reaction fluid (ie, hydrogen, oxygen, or air) to the MEA.
  • Metals are often used to manufacture flow field plates due to their excellent thermal conductivity, electrical conductivity and density.
  • the typical metal materials used for flow field plates are chemically unstable, thus This leads to problems with corrosion resistance and contact conductivity of metal flow field plates.
  • the corrosion resistance and contact conductivity of metal flow field plates are usually improved by applying carbon-based coatings to them.
  • applying carbon-based coatings needs to be carried out in a vacuum environment. This process is complex, time-consuming and costly, and is not conducive to mass production of flow field plates.
  • a large holding force needs to be maintained between the flow field plate and the MEA. This relies on the fuel cell stack fixture.
  • the clamp may become loose, resulting in a reduction in holding force, which in turn leads to an increase in the contact resistance between the flow field plate and the MEA.
  • the present application aims to provide an improved method of manufacturing a flow field plate for a fuel cell unit to overcome at least one of the above drawbacks.
  • a method of manufacturing a flow field plate for a fuel cell unit includes forming a first flow field for flowing a reaction fluid on a first side of a metal plate, the reaction zone of the first flow field including a first ridge defining a first flow channel.
  • Forming the first flow field includes the steps of: cutting out a first pattern corresponding to the first ridge in a first conductive adhesive film; and placing the cut out first pattern on the first side. is bonded to the metal plate such that at least 10% of the height of the first ridge measured from the top is formed by the first pattern.
  • a method of manufacturing a bipolar plate for a fuel cell including: manufacturing a cathode plate using the aforementioned method; manufacturing an anode plate using the aforementioned method; and combining the cathode plate and the The anode plates are fixed together with the first flow field facing away from each other to form a bipolar plate.
  • a flow field plate for a fuel cell unit including: a metal plate; a first flow field formed on a first side of the metal plate and used to circulate a reaction fluid,
  • the reaction area of the first flow field includes a first ridge defining a first flow channel; and a first conductive adhesive film in a first pattern corresponding to the first ridge. , and bonded to the metal plate on the first side such that at least 10% of the height of the first ridge measured from the top is formed by the first pattern.
  • a bipolar plate for a fuel cell including: an anode plate, which is one of the aforementioned flow field plates; and a cathode plate, which is another of the aforementioned flow field plates.
  • the contact conductivity of the flow field plate can be improved, the flow field plate can be easily manufactured, and the manufacturing cost of the flow field plate can be reduced.
  • Figure 1 schematically shows two battery cells of an exemplary fuel cell stack, for which flow field plates manufactured according to the method of the preferred embodiment of the present application are used;
  • Figure 2 is a top view of a flow field plate according to a preferred embodiment of the present application, schematically showing a first side of the flow field plate;
  • Figure 3 is a bottom view of the flow field plate of Figure 2 schematically showing a second side of the flow field plate opposite the first side;
  • Figure 4 is a schematic cross-sectional view along line I-I of Figure 1 schematically showing a cross-section of one version of a flow field plate according to the present application;
  • FIG. 5 is a schematic cross-sectional view similar to FIG. 2 , schematically showing a cross-section of another type of flow field plate according to the present application;
  • FIG. 6 schematically illustrates a top view of a laminated structure including a first conductive adhesive film disposed between two backing films according to a preferred embodiment of the present application
  • Figure 7 is a side view of the laminated structure of Figure 6;
  • FIG. 8 is a top view of the laminated structure of FIG. 6 schematically showing a first pattern cut out in the laminated structure.
  • Figure 9 is a top view similar to Figure 2, in which the first conductive adhesive film and the second adhesive film have not yet been bonded to the metal plate of the flow field plate;
  • Figure 10 is a top view similar to Figures 2 and 9, in which the first conductive adhesive film is bonded to the metal plate of the flow field plate, and the second adhesive film has not yet been bonded to the metal plate of the flow field plate;
  • Figure 11 is an enlarged view of the dotted area A of Figure 10, which schematically illustrates a flow channel structure that can be formed by the manufacturing method according to the present application.
  • FIG. 12 is an enlarged view of the dotted area B of FIG. 10 , schematically showing another flow channel structure that can be formed by means of the manufacturing method according to the present application.
  • Fuel cells can be used in vehicles to provide electricity to drive vehicle motors to provide power or to enable on-board systems to perform various functions.
  • Figure 1 schematically shows two cells 1 of a stack of an exemplary fuel cell.
  • An exemplary fuel cell is a proton exchange membrane fuel cell (PEMFC), and its stack is formed by stacking a plurality of battery cells 1 .
  • PEMFC proton exchange membrane fuel cell
  • the flow field plate 100 manufactured according to the method of the preferred embodiment of the present application can be used in the battery unit 1 to serve as a cathode plate and/or an anode plate.
  • one flow field plate 100 may be used as a cathode plate
  • the other flow field plate 100 may be used as an anode plate.
  • the flow field plate 100 can be combined with other flow field plates.
  • each battery unit 1 usually consists of a cathode plate (the flow field plate 100 on the left side of each battery unit 1 in Figure 1), an anode plate (the flow field plate 100 on the right side of each battery unit 1 in Figure 1 100), proton exchange membrane 3, cathode diffusion layer 5 and cathode catalytic layer structure 7 between the cathode plate and proton exchange membrane 3, anode diffusion layer 9 and anode catalytic layer structure between the anode plate and proton exchange membrane 3 11.
  • the cathode diffusion layer 5, cathode catalytic layer structure 7, anode diffusion layer 9, anode catalytic layer structure 11 and the proton exchange membrane 3 are usually made into one body and are called a membrane electrode assembly (MEA).
  • MEA membrane electrode assembly
  • the cathode diffusion layer 5 and the anode diffusion layer 9 are used to support the cathode catalytic layer structure 7 and the anode catalytic layer structure 11 respectively, and transport reaction fluids and reaction products (hydrogen, oxygen/air, water, etc.).
  • a cathode flow field and an anode flow field are respectively formed on the cathode plate and the anode plate.
  • the cathode flow fields of the cathode plates of multiple battery units 1 can constitute the cathode flow channels of the stack (not shown), and the anode flow fields of the anode plates of multiple battery units 1 can constitute the anode flow channels of the stack (also not shown). Shows).
  • the electrochemical reaction of PEMFC occurs in the MEA, mainly involving the hydrogen oxidation (HOR) process and the oxygen reduction (ORR) process.
  • H 2 and O 2 are transmitted to the anode catalytic layer structure 11 and the cathode catalytic layer structure 7 through the anode diffusion layer 9 and the cathode diffusion layer 5 respectively.
  • H 2 loses electrons at the anode catalytic layer structure 11 under the action of the anode catalyst, forming H + .
  • H + is transferred to the cathode side through the proton exchange membrane 3, and is combined with O2 to form H2O at the cathode catalytic layer structure 7 under the action of the cathode catalyst.
  • H 2 O is transferred into the cathode flow field and the anode flow field through the cathode diffusion layer 5 and the anode diffusion layer 9, and then is discharged from the PEMFC through the cathode flow channel and the anode flow channel.
  • the electrons flow to the cathode through an external circuit (not shown) to form an electric current.
  • the flow field plate 100 includes a metal plate 101 having opposite first and second sides 101a, 101b.
  • the metal plate 101 can be made of iron-based alloys (stainless steel), light metals and their alloys (mainly titanium and its alloys, aluminum and its alloys).
  • the metal plate 101 includes an inlet 101c configured to receive a reaction fluid (in a PEMFC, a reaction gas, specifically hydrogen, oxygen or air), and an outlet 101d configured to discharge reaction products.
  • the inlet 101c and the outlet 101d are openings extending through the metal plate 101.
  • the flow field plate 100 further includes a first flow field 103 formed on the first side 101 a of the metal plate 101 and used to circulate the reaction fluid.
  • the first flow field 103 includes an inlet distribution area 105, a reaction area 107, and an outlet collection area 109 that are sequentially arranged along the reaction gas flow direction.
  • Reaction zone 107 includes a first ridge 107b defining a first flow channel 107a.
  • the first flow channel 107a extends between the inlet distribution area 105 and the outlet collection area 109.
  • the inlet distribution area 105 of the first flow field 103 is configured to be disposed close to the inlet 101c of the metal plate 101 and communicate with the inlet 101c to receive the reaction gas from the inlet 101c, and is configured to distribute the reaction gas to each flow channel 107a.
  • the outlet collection area 109 is configured to collect the reaction product from the first flow channel 107a, and is configured to be disposed close to the outlet 101d of the metal plate 101 and communicate with the outlet 101d to discharge the reaction product to the outlet 101d.
  • the flow field plate 100 further includes a first conductive adhesive film 111 in a first pattern corresponding to the first ridges 107b and on the first side 101a Bonded to metal plate 101 such that at least 10% (eg, 10%, 20%, 30%, 40%, 50%, 60%, 70%) of first ridge 107b measured from top 107b1 (Fig. 4) , 80%, 90%, 100% or any value therebetween) of a height formed by the first pattern.
  • a first conductive adhesive film 111 in a first pattern corresponding to the first ridges 107b and on the first side 101a Bonded to metal plate 101 such that at least 10% (eg, 10%, 20%, 30%, 40%, 50%, 60%, 70%) of first ridge 107b measured from top 107b1 (Fig. 4) , 80%, 90%, 100% or any value therebetween) of a height formed by the first pattern.
  • first conductive adhesive film 111 can bond metal plate 101 to the cathode diffusion layer of the MEA 5 and the corresponding diffusion layer in the anode diffusion layer 9.
  • First conductive adhesive film 111 A stable bonding force can be maintained between the metal plate 101 and the corresponding diffusion layers in the cathode diffusion layer 5 and the anode diffusion layer 9 during long-term operation of the fuel cell to keep the contact resistance substantially constant, which helps to improve the flow field
  • the contact conductivity of the plate 100 improves the reliability and power generation performance of the fuel cell
  • (2) providing the first conductive adhesive film 111 can reduce the interaction between the metal plate 101 and the cathode diffusion layer 5 and the anode diffusion layer 9 The need to apply additional holding force between the diffusion layers improves the reliability of the fuel cell;
  • the first conductive adhesive film 111 covers a part of the metal plate 101, helping to prevent damage to that part of the metal plate 101 Corrosion occurs, thereby increasing the service life of the flow field plate 100;
  • the first conductive adhesive film 111 is fixed to the
  • FIG. 9 is a top view of the metal plate 101 schematically showing the first side 101 a of the metal plate 101 .
  • the metal plate 101 has been formed with an inlet 101c and an outlet 101d.
  • the inlet 101c and the outlet 101d of the metal plate 101 may be formed by any process known in the art, such as machining, stamping, or the like.
  • the method for manufacturing the flow field plate 100 includes forming a first flow field 103 for flowing a reaction fluid on the first side 101a of the metal plate 101.
  • the reaction zone 107 of the first flow field 103 includes the first ridge 107b defining the first flow channel 107a.
  • Forming the first flow field 103 includes the following steps: (1) cutting a first pattern corresponding to the first ridge 107b in the first conductive adhesive film 111 (FIG. 8); and (2) cutting out the first pattern 107b in the first conductive adhesive film 111;
  • the pattern is bonded to the metal plate 101 on the first side 101a such that at least 10% of the height of the first ridge 107b measured from the top is formed by the first pattern (Fig. 10). It can be understood that the manufacturing method according to the present application can provide the above advantages (1) to (5).
  • Figures 11 and 12 illustrate two flow channel structures that can be formed by the manufacturing method of the present application.
  • Figure 11 shows the first flow channel 107a with a constriction structure.
  • the first flow channel 107a is defined by the shape of the first ridge 107b.
  • the flow area of the first flow channel 107a first decreases and then increases along the reaction fluid flow direction (indicated by the dotted arrow in the figure), thereby accelerating the flow of the reaction fluid or reaction product.
  • flow area refers to the effective cross-sectional area of a passage for fluid flow in a component or portion.
  • This constriction structure can be disposed at a desired position in the first flow field 103 to achieve the effect of accelerating the flow of the reaction fluid or reaction product.
  • this constriction structure can be disposed downstream of the reaction zone of the cathode flow field to accelerate the discharge of reaction products.
  • Figure 12 shows the first flow channel 107a with a spoiler structure.
  • a protrusion 108 protruding into the first flow channel 107a may be provided on the side wall of the first flow channel 107a (ie, the first ridge 107b) to disrupt the flow of the reaction fluid. This helps enhance the reaction in reaction zone 107.
  • the flow channel structures shown in Figures 11 and 12 are difficult to form through traditional processes such as stamping and machining.
  • the first flow channel 107a having a constriction structure and a spoiler structure can be formed easily and at low cost. It should be understood that the manufacturing method of the present application can also easily and cost-effectively form other flow channel structures that are difficult to form through traditional processes such as stamping and machining, and the present application is not limited thereto.
  • the manufacturing method of the present application can easily and cost-effectively form various complex flow field patterns, and reduce or even eliminate the cost of stamping die design and manufacturing.
  • the manufacturing method of the present application can improve the design and manufacturing flexibility of the flow field plate 100 .
  • the entire (100%) height of first ridge 107b measured from top 107b1 may be formed from first conductive adhesive film 111 (ie, the first pattern).
  • first conductive adhesive film 111 ie, the first pattern.
  • the first area of the metal plate 101 corresponding to the reaction zone 107 is substantially flat.
  • substantially flat means within manufacturing tolerances.
  • the first pattern may be configured such that the entire height of the first ridge 107b measured from the top 107b1 is formed by the first pattern. Accordingly, the step of bonding the cut-out first pattern to the metal plate 101 on the first side 101a includes bonding the cut-out first pattern to the first area of the metal plate 101 on the first side 101a, To form the entire first ridge 107b.
  • This method can further improve the design and manufacturing flexibility of the flow field plate 100 .
  • the entire height of the first ridge 107b measured from the top 107b1 is formed by the first conductive adhesive film 111 (i.e. , the first pattern) is formed.
  • the side wall 107a1 of the first flow channel 107a may be perpendicular to the bottom wall 107a2 of the first flow channel 107a, that is, the draft angle is 0.
  • This flow channel structure helps to increase the flow channel density in the reaction zone 107, thereby improving the performance of the flow field plate 100.
  • This runner structure is difficult to form through traditional processes such as stamping and machining.
  • the manufacturing method of the present application the first flow channel 107a with the side wall 107a1 perpendicular to the bottom wall 107a2 of the first flow channel 107a can be formed easily and at low cost.
  • first ridge 107 b measured from bottom 107 b 2 opposite top 107 b 1 may be formed by stamping metal plate 101 .
  • the first ridge 107b is composed of a first part and a second part. The first part is formed by punching the metal plate 101, and the second part is formed by bonding the first conductive adhesive film 111 to the first part.
  • forming the first flow field 103 further includes the step of forming the first part of the first ridge 107b by punching the metal plate 101, and bonding the cut out first pattern to the metal plate on the first side 101a.
  • Step 101 includes gluing the cut out first pattern to the first portion to form the second portion, thereby forming the entire first ridge 107b.
  • the first conductive adhesive film 111 includes a first adhesive material and first conductive particles dispersed in the first adhesive material.
  • the first conductive particles may be dispersed in the first viscous material in any suitable weight percent by any suitable process. This specifically depends on the conductive properties of the first viscous material itself and the density and conductivity of the first conductive particles.
  • the first adhesive material may be polymethyl methacrylate (PMMA), acrylic glue, polypyrrole, epoxy resin, silicone resin, polyamide, polyimide or fluorine rubber.
  • the first conductive particles may be gold (Au), graphite, high specific surface carbon materials such as Ketjen black, carbon black, graphene, single-walled carbon nanotubes, multi-walled carbon nanotubes, chromium nitride (CrN), titanium nitride (TiN).
  • Au gold
  • graphite high specific surface carbon materials
  • Ketjen black carbon black
  • graphene single-walled carbon nanotubes
  • multi-walled carbon nanotubes multi-walled carbon nanotubes
  • CrN chromium nitride
  • TiN titanium nitride
  • the first adhesive material and the first conductive particles may be any corresponding diffusion layers that enable the first conductive adhesive film 111 to be formed in the metal plate 101 and the cathode diffusion layer 5 and the anode diffusion layer 9 Suitable materials that maintain stable adhesion and maintain substantially constant contact resistance.
  • the first conductive adhesive film 111 is configured to bond the metal plate 101 to a corresponding one of the cathode diffusion layer 5 and the anode diffusion layer 9 to provide a gap between the corresponding diffusion layer and the metal plate 101 Adhesion force of at least 2N/cm (eg, 2N/cm, 2.5N/cm, 3N/cm or higher). This helps maintain a stable adhesion between the metal plate 101 and the corresponding diffusion layer and maintain a substantially constant contact resistance. Furthermore, this also contributes to the need to apply additional holding forces between the metal plate 101 and the corresponding diffusion layer.
  • each first flow channel 107a is defined by two side walls 107a1 and a bottom wall 107a2 extending between the two side walls 107a1.
  • the two side walls 107a1 are formed by two adjacent first ridges 107b
  • the bottom wall 107a2 is formed by a portion of the metal plate 101 between the two adjacent first ridges 107b.
  • the first pattern ie, the conductive adhesive film 111
  • the portion of the metal plate 101 between two adjacent first ridges 107b or the entire metal plate 101 may be surface treated to provide corrosion resistance.
  • the step of cutting out the first pattern corresponding to the first ridge 107b in the first conductive adhesive film 111 may include disposing the first conductive adhesive film 111 A laminated structure 300 is formed between the two back films 200, and a first pattern corresponding to the first ridge portion 107b is cut in the laminated structure 300.
  • FIG. 6 schematically shows a top view of a laminated structure 300 including the first conductive adhesive film 111 disposed between two layers of backing films 200
  • FIG. 7 is a side view of the laminated structure of FIG. 6
  • FIG. 8 is a top view of the laminated structure 300 of FIG. 6 , schematically showing the first pattern cut out in the laminated structure 300 .
  • the step of bonding the cut-out first pattern to the metal plate 101 on the first side 101a may include peeling the cut-out first pattern from the back film 200 and bonding it to the metal plate 101 on the first side 101a (As shown in Figure 10).
  • the back film 200 may be made of a material suitable for holding the first conductive adhesive film 111 during cutting of the first pattern, and for holding the first conductive adhesive film 111 during cutting.
  • the first conductive adhesive film 111 is easily peeled off from the first pattern without damage.
  • the inlet distribution zone 105 and the outlet collection zone 109 of the first flow field 103 can be formed in a similar manner to the reaction zone 107 .
  • at least one of the inlet distribution area 105 and the outlet collection area 109 includes a second ridge 113b that defines a second flow channel 113a.
  • the flow field plate 100 also includes a second adhesive film (not labeled) in a second pattern corresponding to the second ridges 113b and bonded to the metal plate 101 on the first side 101a to Such that at least a portion of second ridge 113b measured from top 113b1 (e.g., 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, or any therebetween value) height is formed by the second pattern.
  • a second adhesive film not labeled in a second pattern corresponding to the second ridges 113b and bonded to the metal plate 101 on the first side 101a to Such that at least a portion of second ridge 113b measured from top 113b1 (e.g., 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, or any therebetween value) height is formed by the second pattern.
  • forming the first flow field 103 further includes the steps of: cutting out a second pattern corresponding to the second ridge 113b in the second adhesive film; and bonding the cut out second pattern on the first side 101a to the metal plate 101 such that at least a portion of the height of the second ridge 113b measured from the top 113b1 is formed by the second pattern.
  • the second adhesive film can further help maintain stable adhesion between the metal plate 101 and the corresponding diffusion layers in the cathode diffusion layer 5 and the anode diffusion layer 9, thereby Keeping the contact resistance substantially constant helps to improve the contact conductivity of the flow field plate 100, thereby improving the performance of the fuel cell using the flow field plate 100; (2) at least a portion of the height of the second ridge 113b measured from the top 113b1 Formed by the second pattern, this allows the second adhesive film to form at least a portion of the flow field of at least one of the inlet distribution area 105 and the outlet collection area 109, which helps to reduce or even eliminate the need for manufacturing the flow field plate. At least one of the inlet distribution area 105 and the outlet collection area 109 of 100 eliminates the required stamping work and increases flexibility in the design and manufacture of the flow field plate 100 .
  • the second adhesive film may be a polyethylene naphthalate (PEN), polyethylene terephthalate (PET) or polyimide (PI) film surface-coated with acrylic glue . It should be understood that the second adhesive film is not limited thereto and may also be made of other suitable materials.
  • PEN polyethylene naphthalate
  • PET polyethylene terephthalate
  • PI polyimide
  • the second area of at least one of the inlet distribution area 105 and the outlet collection area 109 of the metal plate 101 is substantially flat. It is contemplated that a second adhesive film may be bonded to the second area (Fig. 2) and configured such that the entire height of the second ridge 113b measured from the top 113b1 is formed by the second pattern.
  • the second pattern is configured such that the entire height of the second ridge measured from the top 107b1 is formed by the second pattern
  • the step of bonding the cut-out second pattern to the metal plate 101 on the first side 101a includes The cut out second pattern is bonded on the first side 101a to the second area of the metal plate 101 to form the entire second ridge 113b.
  • the methods described herein enable easy and cost-effective formation of flows of inlet distribution zone 105 and outlet collecting zone 109 that are difficult to form by conventional processes such as stamping and machining. Channel structure and flow channel pattern.
  • a portion of the second ridge 113b measured from the bottom opposite the top 107b1 may be formed by stamping the metal plate 101 and the remaining portion of the second ridge 113b by stamping the second ridge 113b from the bottom 107b1. Two adhesive films are bonded to this part to form. Thereby, the entire second ridge portion 113b can be formed.
  • the metal plate 101 further includes an inlet 101 e configured to receive cooling fluid, and an outlet 101 f configured to discharge the cooling fluid.
  • the metal plate 101 further includes a first opening 101g and a second opening 101h configured to communicate with the reaction fluid inlet and the reaction product outlet of another matched metal plate 101, respectively.
  • the inlet 101e, the outlet 101f, the first opening 101g and the second opening 101h are all openings extending through the metal plate 101.
  • the flow field plate 100 may further include a second flow field 115 formed on the second side 101 b of the metal plate 101 opposite to the first side 101 a and used to circulate the cooling fluid.
  • the second flow field 115 includes a third ridge 117b defining a third flow channel 117a.
  • the third flow channel 117a extends between the inlet 101e and the outlet 101f. Cooling fluid flows into the second flow field 115 from the inlet 101e and exits the second flow field 115 from the outlet 101f.
  • the second flow field 115 can be formed in a similar manner to the reaction zone 107 .
  • the flow field plate 100 further includes a third conductive adhesive film 118 ( FIGS. 4 and 5 ) having a third pattern corresponding to the third ridge portion 117 b and in the second Side 101b is bonded to metal plate 101 such that at least 10% of third ridge 117b measured from top 117b1 (e.g., 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% or any value therebetween) of the height is formed by the third pattern.
  • the method for forming the flow field plate 100 of the present application further includes forming a second flow field 115 for circulating cooling fluid on the second side 101b of the metal plate 101 opposite to the first side 101a.
  • Forming the second flow field 115 includes the steps of: cutting a third pattern corresponding to the third ridge 117b in the third conductive adhesive film 118; and bonding the cut-out third pattern to the second side 101b.
  • the metal plate 101 is such that at least 10% of the height of the third ridge 117b measured from the top 117b1 is formed by the third pattern.
  • the third conductive adhesive film 118 can be A stable bonding force is maintained between the two flow field plates 100, thereby keeping the contact resistance substantially constant; (2) at least 10% of the height of the third ridge 117b measured from the top 117b1 is formed by the third pattern, which makes the third ridge 117b
  • the tri-conductive adhesive film 118 forms at least a portion of the second flow field 115 for circulating cooling fluid, which helps reduce or even eliminate the stamping work required in manufacturing the second flow field 115 of the flow field plate 100, and Improved design and manufacturing flexibility of the flow field plate 100 .
  • the third conductive adhesive film 118 includes a third adhesive material and second conductive particles dispersed in the third adhesive material.
  • the second conductive particles may be dispersed in the third viscous material in any suitable weight percent by any suitable process. This depends specifically on the conductive properties of the third viscous material itself and the density and conductivity of the second conductive particles.
  • the third adhesive material is phenolic resin or epoxy resin.
  • the second conductive particles are expanded graphite or other highly conductive carbon materials.
  • the third region of the metal plate 101 corresponding to the second flow field 115 is substantially flat.
  • the third pattern is bonded to the third area and is configured such that the entire height of third ridge 117b measured from top 117b1 is formed by the third pattern.
  • the third pattern is configured such that the entire height of the third ridge 117b measured from the top 117b1 is formed by the third pattern, and the step of bonding the cut-out third pattern to the metal plate 101 on the second side 101b This involves bonding the cut out third pattern to three areas of the metal plate 101 on the second side 101b to form the entire third ridge 117b.
  • the methods described herein enable easy and cost-effective formation of second flow field 115 for circulating cooling fluid that is difficult to form by conventional processes such as stamping and machining.
  • the flow channel structure and flow channel pattern may be formed by stamping the metal plate 101 (eg, at the same time as the first ridge 107b is stamped) , and the remaining portion of the third ridge portion 117b is formed by bonding the third conductive adhesive film 118 to this portion. Thereby, the entire third ridge portion 117b can be formed.
  • the flow field plate 100 manufactured according to the aforementioned method can be used as an anode plate or a cathode plate.
  • the anode plate of one fuel cell unit 1 of two adjacent fuel cell units 1 can be fixed together with the cathode plate of the other fuel cell unit 1 before assembling the stack.
  • Form bipolar plates In other words, the cathode plate and the anode plate manufactured by the aforementioned method can be fixed together with the first flow field 103 facing away from each other to form a bipolar plate.
  • both the cathode plate and the anode plate may have a second flow field 115 for circulating cooling fluid, and the second flow field 115 of the cathode plate and the second flow field 115 of the anode plate may cooperate with each other to jointly form A flow field for circulating cooling fluid.
  • only one of the cathode plate and the anode plate has a second flow field 115 for circulating the cooling fluid, and the second flow field 115 is used to circulate the cooling fluid between the cathode plate and the anode plate.
  • the entire height of the first ridge 107b of the cathode plate's first flow field 103 is formed by the first conductive adhesive film 111, while the entire height of the first flow field 103 of the anode plate is formed by the first conductive adhesive film 111.
  • a height of 10% to 50% (eg, 10%, 20%, 30%, 40%, 50%, or any value therebetween) of first ridge 107b measured from top 107b1 is formed by first conductive adhesive film 111 .
  • the remainder of the first ridge 107b of the first flow field 103 of the anode plate is formed by stamping.
  • a second flow field 115 for circulating cooling fluid can be formed on the second side 101b of the anode plate opposite to the first side 101a where the first flow field 103 is formed. At least part of it.
  • the first flow field 103 of the cathode plate serves as the cathode flow field
  • the first flow field 103 of the anode plate serves as the anode flow field.
  • the reaction products on the cathode side include water, and the water needs to be quickly discharged from the reaction zone 107 through the cathode flow field.
  • Example 1 includes a method of manufacturing a flow field plate for a fuel cell unit, the method comprising: forming a first flow field for flowing a reaction fluid on a first side of the metal plate, the first flow field having The reaction zone includes a first ridge defining a first flow channel.
  • Forming the first flow field includes the steps of: cutting out a first pattern corresponding to the first ridge in a first conductive adhesive film; and placing the cut out first pattern on the first side. is bonded to the metal plate such that at least 10% of the height of the first ridge measured from the top is formed by the first pattern.
  • Example 2 includes the method of Example 1, wherein: forming the first flow field further includes forming a first portion of the first ridge by punching the metal plate; and cutting out the first pattern Bonding to the metal plate on the first side includes bonding the first pattern cut out to the first portion to form the entire first ridge.
  • Example 3 includes the method of Example 1, wherein: a first area of the metal plate corresponding to the reaction zone is substantially flat, and the first pattern is configured such that a portion of the first ridge extends from the top The entire measured height is formed by the first pattern; and the step of bonding the cut-out first pattern to the metal plate on the first side includes attaching the cut-out first pattern on the first side. The first side is bonded to the first area of the metal plate to form the entire first ridge.
  • Example 4 includes the method of Example 1, wherein each of the first flow channels is defined by two side walls and a bottom wall extending between the two side walls, the two side walls being formed by two adjacent The first ridge is formed, and the bottom wall is formed from a portion of the metal plate between the two adjacent first ridges, and the first pattern is not in contact with the metal plate. The parts overlap.
  • Example 5 includes the method of Example 1, wherein the first conductive adhesive film includes a first adhesive material and first conductive particles dispersed in the first adhesive material.
  • Example 6 includes the method of Example 5, wherein: the first viscous material is PMMA, acrylic glue, polypyrrole, epoxy resin, silicone, polyamide, polyimide or fluororubber; and/or the first
  • the conductive particles are gold, graphite, Ketjen black, carbon black, graphene, single-walled carbon nanotubes, multi-walled carbon nanotubes, chromium nitride, and titanium nitride.
  • Example 7 includes the method of Example 1, wherein the fuel cell unit further includes a membrane electrode assembly having a diffusion layer, and the first conductive adhesive film is configured to bond the metal plate to the diffusion layer, to An adhesion force of at least 2 N/cm is provided between the diffusion layer and the metal plate.
  • Example 8 includes the method of Example 1, wherein cutting the first pattern corresponding to the first ridges in the first conductive adhesive film includes disposing the first conductive adhesive film on between two layers of back films to form a laminated structure, and cut out the first pattern corresponding to the first ridge in the laminated structure, and place the cut out first pattern on the first
  • the step of bonding to the metal plate on one side includes peeling the cut-out first pattern from the back film and bonding to the metal plate on the first side.
  • Example 9 includes the method of any one of examples 1 to 8, wherein the metal plate further includes an inlet configured to receive the reaction fluid and an outlet configured to discharge the reaction product; the first flow field further includes a In an inlet distribution area connected to the inlet and an outlet collection area connected to the outlet, the reaction zone extends between the inlet distribution area and the outlet collection area, the inlet distribution area and At least one of the outlet convergence areas includes a second ridge defining a second flow channel.
  • Forming the first flow field further includes the steps of: cutting a second pattern corresponding to the second ridge in a second adhesive film; and placing the cut second pattern on the first side. is bonded to the metal plate such that at least a portion of the height of the second ridge measured from the top is formed by the second pattern.
  • Example 10 includes the method of Example 9, wherein: a second area of the metal plate corresponding to the at least one of the inlet distribution area and the outlet collection area is substantially flat, and the second pattern is configured such that the entire height of the second ridge measured from the top is formed by the second pattern; and bonding the cut out second pattern to the metal plate on the first side
  • the step includes bonding the cut out second pattern on the first side to the second area of the metal plate to form the entire second ridge.
  • Example 11 includes the method of Example 10, wherein the second adhesive film is a PEN, PET or PI film whose surface is coated with acrylic glue.
  • Example 12 includes the method of any one of examples 1 to 8, wherein the method further includes forming a second flow field for circulating cooling fluid on a second side of the metal plate opposite the first side.
  • the second flow field includes a third ridge defining a second flow channel.
  • Forming the second flow field includes the steps of: cutting out a third pattern corresponding to the third ridge in a third conductive adhesive film; and placing the cut out third pattern on the second side. is bonded to the metal plate such that at least 10% of the height of the third ridge measured from the top is formed by the third pattern.
  • Example 13 includes the method of Example 12, wherein: a third region of the metal plate corresponding to the second flow field is substantially flat, and the third pattern is configured such that a portion of the third ridge extends from the The entire height measured at the top is formed by the third pattern; and the step of bonding the cut-out third pattern to the metal plate on the second side includes attaching the cut-out third pattern Bonded to the three areas of the metal plate on the second side to form the entire third ridge.
  • Example 14 includes the method of Example 12, wherein the third conductive adhesive film includes a third viscous material, preferably a phenolic resin, and second conductive particles dispersed in the third viscous material. Or epoxy resin, the second conductive particles are preferably expanded graphite.
  • the third conductive adhesive film includes a third viscous material, preferably a phenolic resin, and second conductive particles dispersed in the third viscous material. Or epoxy resin, the second conductive particles are preferably expanded graphite.
  • Example 15 includes a method of manufacturing a bipolar plate for a fuel cell, the method comprising: manufacturing a cathode plate using the method of Example 1; manufacturing an anode plate using the method of Example 1; and combining the cathode plate and the anode.
  • the plates are secured together with the first flow fields facing away from each other to form a bipolar plate.
  • Example 16 includes the method of Example 15, wherein: an entire height of the first ridge of the first flow field of the cathode plate is formed from the first conductive adhesive film; and the From 10% to 50% of the height of the first ridge of the first flow field measured from the top is formed by the first conductive adhesive film.
  • Example 17 includes a flow field plate for a fuel cell unit, the flow field plate including: a metal plate; a first flow field formed on a first side of the metal plate and for flowing a reaction fluid, the The reaction zone of the first flow field includes a first ridge defining a first flow channel; and a first conductive adhesive film in a first pattern corresponding to the first ridge, and Bonded to the metal plate on the first side such that at least 10% of the height of the first ridge measured from the top is formed by the first pattern.
  • Example 18 includes the flow field plate of Example 17, wherein the first ridge is comprised of a first portion formed by stamping the metal plate, and a second portion formed by stamping the metal plate.
  • the first conductive adhesive film is formed by bonding to the first part.
  • Example 19 includes the flow field plate of Example 17, wherein a first region of the metal plate corresponding to the reaction zone is substantially flat, and the first conductive adhesive film is bonded to the first region , and configured such that the entire height of the first ridge measured from the top is formed by the first pattern.
  • Example 20 includes the flow field plate of Example 17, wherein each of the first flow channels is defined by two side walls and a bottom wall extending between the two side walls, the two side walls being bounded by adjacent Two of said first ridges are formed, and said bottom wall is formed by a second portion of said metal plate between said two adjacent said first ridges, and said first pattern is not identical to The second portions of the metal plates overlap.
  • Example 21 includes the flow field plate of Example 17, wherein the first conductive adhesive film includes a first viscous material and first conductive particles dispersed in the first viscous material.
  • Example 22 includes the flow field plate of Example 21, wherein the first viscous material is PMMA, acrylic glue, polypyrrole, epoxy resin, silicone resin, polyamide, polyimide or fluororubber, and/or the
  • the first conductive particles are gold, graphite, Ketjen black, carbon black, graphene, single-walled carbon nanotubes, multi-walled carbon nanotubes, chromium nitride, and titanium nitride.
  • Example 23 includes the flow field plate of Example 17, wherein the fuel cell unit further includes a membrane electrode assembly having a diffusion layer, the first conductive adhesive film configured to bond the metal plate to the diffusion layer , to provide an adhesion force of at least 2N/cm between the diffusion layer and the metal plate.
  • Example 24 includes the flow field plate of Example 17, wherein the flow field plate further includes an inlet configured to receive the reaction fluid, and an outlet configured to discharge the reaction product; the first flow field further includes an outlet configured to communicate with the reaction fluid.
  • the inlet distribution area is connected to the inlet, and the outlet collection area is used to communicate with the outlet.
  • the reaction zone extends between the inlet distribution area and the outlet collection area.
  • the inlet distribution area and the outlet At least one of the collection areas includes a second ridge defining a second flow channel; the flow field plate further includes a second adhesive film, the second adhesive film being in a shape corresponding to the second ridge a second pattern and bonded to the metal plate on the first side such that at least a portion of the height of the second ridge measured from the top is formed by the second pattern.
  • Example 25 includes the flow field plate of Example 24, wherein the second adhesive film is a PEN, PET or PI film whose surface is coated with acrylic glue.
  • Example 26 includes the flow field plate of example 17, wherein a second area of the metal plate corresponding to the at least one of the inlet distribution area and the outlet collection area is substantially flat, the second An adhesive film is bonded to the second region and configured so that the entire height of the second ridge measured from the top is formed by the second pattern.
  • Example 27 includes the flow field plate of Example 17, wherein the flow field plate further includes: a second flow field formed on a second side of the metal plate opposite the first side and for flowing a cooling fluid.
  • the second flow field includes a third ridge defining a second flow channel; and a third conductive adhesive film, the third conductive adhesive film having a third pattern corresponding to the third ridge, and bonded to the metal plate on the second side such that at least 10% of the height of the third ridge measured from the top is formed by the third pattern.
  • Example 28 includes the flow field plate of Example 27, wherein the third conductive adhesive film includes a third viscous material and second conductive particles dispersed in the third viscous material, the third viscous material is preferably Phenolic resin or epoxy resin, the second conductive particles are preferably expanded graphite.
  • the third viscous material is preferably Phenolic resin or epoxy resin
  • the second conductive particles are preferably expanded graphite.
  • Example 29 includes the flow field plate of Example 17, wherein a third region of the metal plate corresponding to the second flow field is substantially flat, the third pattern is bonded to the third region, and is configured such that the entire height of the third ridge measured from the top is formed by the third pattern.
  • Example 30 includes a bipolar plate for a fuel cell, the bipolar plate comprising: an anode plate, the anode plate being a flow field plate according to Example 11; and a cathode plate, the cathode plate being a flow field plate according to Example 11. Field plate; wherein the anode plate and the cathode plate are fixed together in such a manner that the first flow field faces away from each other.
  • Example 31 includes the bipolar plate of Example 30, wherein the entire height of the first ridge of the first flow field of the cathode plate is formed by the first conductive adhesive film, and all of the height of the first ridge of the anode plate is From 10% to 50% of the height of the first ridge of the first flow field measured from the top is formed by the first conductive adhesive film.

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Abstract

The present application provides a method for manufacturing a flow field plate for use in a fuel cell unit. The method comprises: forming, on a first side of a metal plate, a first flow field for flow of a reaction fluid, a reaction region of the first flow field comprising a first ridge portion defining a first flow channel. The forming the first flow field comprises the following steps: cutting out, in a first conductive adhesive film, a first pattern corresponding to the first ridge portion; and bonding the cut-out first pattern to the metal plate on the first side, so that at least 10% of the height of the first ridge portion measured from the top is formed by the first pattern. The present application further provides a method for manufacturing a bipolar plate for use in a fuel cell, and a flow field plate and a bipolar plate manufactured according to the described methods. According to the present application, the contact conductivity of the flow field plate can be improved, the flow field plate is easy to manufacture, and the manufacturing cost of the flow field plate is reduced.

Description

流场板、双极板及其制造方法Flow field plate, bipolar plate and manufacturing method thereof 技术领域Technical field
本申请总体上涉及燃料电池技术，尤其涉及用于燃料电池的流场板、双极板及其制造方法。The present application relates generally to fuel cell technology, and in particular to flow field plates, bipolar plates for fuel cells, and methods of manufacturing the same.
背景技术Background technique
利用燃料与氧化剂的电化学反应发电的燃料电池被日益广泛地用来提供电力，尤其是在电动车辆领域中。质子交换膜燃料电池是一种广泛应用的燃料电池，其采用氢气为燃料，氧气为氧化剂。通常，膜电极组件(MEA)被设置在两个流场板之间，以形成燃料电池单元。两个流场板分别用作阴极板和阳极板，并且包括用于向MEA供给反应流体(即，氢气、氧气或空气)的流场。Fuel cells, which use the electrochemical reaction of fuel and oxidant to generate electricity, are increasingly used to provide electricity, especially in the field of electric vehicles. The proton exchange membrane fuel cell is a widely used fuel cell that uses hydrogen as fuel and oxygen as oxidant. Typically, a membrane electrode assembly (MEA) is disposed between two flow field plates to form a fuel cell unit. The two flow field plates serve as cathode plates and anode plates respectively, and include flow fields for supplying reaction fluid (ie, hydrogen, oxygen, or air) to the MEA.
金属由于其优良的导热性、导电性和致密性而常用于制造流场板。但是，在质子交换膜燃料电池的工作环境中(例如，低pH，高湿，约80℃的运行温度)，用于流场板的典型金属材料(不锈钢、钛等)化学性质不稳定，从而导致金属流场板在耐腐蚀性和接触导电性方面存在问题。Metals are often used to manufacture flow field plates due to their excellent thermal conductivity, electrical conductivity and density. However, in the working environment of proton exchange membrane fuel cells (e.g., low pH, high humidity, operating temperature of about 80°C), the typical metal materials used for flow field plates (stainless steel, titanium, etc.) are chemically unstable, thus This leads to problems with corrosion resistance and contact conductivity of metal flow field plates.
在现有的流场板制造技术中，通常通过给金属流场板施加碳基涂层来改善其耐腐蚀性和接触导电性。然而，施加碳基涂层需要在真空环境下进行，此过程复杂费时且成本高昂，不利于大规模生产流场板。此外，为了在施加有碳基涂层的流场板与MEA之间保持基本恒定的接触电阻，需要在流场板与MEA之间维持较大的保持力。这依赖于燃料电池的电堆夹具。然而，由于燃料电池的工作环境中的振动，夹具可能会松脱，导致保持力发生减小，进而导致流场板与MEA之间的接触电阻变大。In the existing flow field plate manufacturing technology, the corrosion resistance and contact conductivity of metal flow field plates are usually improved by applying carbon-based coatings to them. However, applying carbon-based coatings needs to be carried out in a vacuum environment. This process is complex, time-consuming and costly, and is not conducive to mass production of flow field plates. Furthermore, in order to maintain a substantially constant contact resistance between the flow field plate to which the carbon-based coating is applied and the MEA, a large holding force needs to be maintained between the flow field plate and the MEA. This relies on the fuel cell stack fixture. However, due to vibration in the working environment of the fuel cell, the clamp may become loose, resulting in a reduction in holding force, which in turn leads to an increase in the contact resistance between the flow field plate and the MEA.
因此，需要对现有的流场板制造技术进行改进。Therefore, existing flow field plate manufacturing technology needs to be improved.
发明内容Contents of the invention
本申请旨在提供一种改进的制造用于燃料电池单元的流场板的方法，以克服上述至少一种缺陷。The present application aims to provide an improved method of manufacturing a flow field plate for a fuel cell unit to overcome at least one of the above drawbacks.
根据本申请的一方面，提供了一种制造用于燃料电池单元的流场板的 方法。所述方法包括：在金属板的第一侧上形成用于流通反应流体的第一流场，所述第一流场的反应区包括界定出第一流道的第一脊部。形成所述第一流场包括以下步骤：在第一导电粘合膜中切出对应于所述第一脊部的第一图案；以及将切出的所述第一图案在所述第一侧上粘接到所述金属板，以使得所述第一脊部的从顶部测量的至少10％的高度由所述第一图案形成。According to one aspect of the present application, a method of manufacturing a flow field plate for a fuel cell unit is provided. The method includes forming a first flow field for flowing a reaction fluid on a first side of a metal plate, the reaction zone of the first flow field including a first ridge defining a first flow channel. Forming the first flow field includes the steps of: cutting out a first pattern corresponding to the first ridge in a first conductive adhesive film; and placing the cut out first pattern on the first side. is bonded to the metal plate such that at least 10% of the height of the first ridge measured from the top is formed by the first pattern.
根据本申请的另一方面，提供了一种制造用于燃料电池的双极板的方法，包括：利用前述的方法制造阴极板；利用前述的方法制造阳极板；以及将所述阴极板和所述阳极板以所述第一流场彼此背对的方式固定在一起，以形成双极板。According to another aspect of the present application, a method of manufacturing a bipolar plate for a fuel cell is provided, including: manufacturing a cathode plate using the aforementioned method; manufacturing an anode plate using the aforementioned method; and combining the cathode plate and the The anode plates are fixed together with the first flow field facing away from each other to form a bipolar plate.
根据本申请的又一方面，提供了一种用于燃料电池单元的流场板，包括：金属板；形成于所述金属板的第一侧上并且用于流通反应流体的第一流场，所述第一流场的反应区包括界定出第一流道的第一脊部；以及第一导电粘合膜，所述第一导电粘合膜呈对应于所述第一脊部的第一图案，并且在所述第一侧上粘接到所述金属板，以使得所述第一脊部的从顶部测量的至少10％的高度由所述第一图案形成。According to yet another aspect of the present application, a flow field plate for a fuel cell unit is provided, including: a metal plate; a first flow field formed on a first side of the metal plate and used to circulate a reaction fluid, The reaction area of the first flow field includes a first ridge defining a first flow channel; and a first conductive adhesive film in a first pattern corresponding to the first ridge. , and bonded to the metal plate on the first side such that at least 10% of the height of the first ridge measured from the top is formed by the first pattern.
根据本申请的再一方面，提供了一种用于燃料电池的双极板，包括：阳极板，所述阳极板是一个前述的流场板；阴极板，所述阴极板是另一个前述的流场板；其中，所述阳极板和所述阴极板以所述第一流场彼此背对的方式固定在一起。According to yet another aspect of the present application, a bipolar plate for a fuel cell is provided, including: an anode plate, which is one of the aforementioned flow field plates; and a cathode plate, which is another of the aforementioned flow field plates. Flow field plate; wherein the anode plate and the cathode plate are fixed together in such a manner that the first flow field faces away from each other.
根据本申请，能够改善流场板的接触导电性，并且使得流场板易于制造，降低流场板的制造成本。According to the present application, the contact conductivity of the flow field plate can be improved, the flow field plate can be easily manufactured, and the manufacturing cost of the flow field plate can be reduced.
附图说明Description of drawings
下面将结合附图来更彻底地理解并认识本申请的上述和其它方面。应当注意的是，附图仅为示意性的，并非按比例绘制。在附图中：These and other aspects of the present application will be more fully understood and appreciated below in conjunction with the accompanying drawings. It should be noted that the drawings are schematic only and are not drawn to scale. In the attached picture:
图1示意性地示出了示例性燃料电池的电堆的两个电池单元，根据本申请的优选实施例的方法制造的流场板被用于这些电池单元；Figure 1 schematically shows two battery cells of an exemplary fuel cell stack, for which flow field plates manufactured according to the method of the preferred embodiment of the present application are used;
图2是根据本申请的优选实施例的流场板的俯视图，其示意性地示出了流场板的第一侧；Figure 2 is a top view of a flow field plate according to a preferred embodiment of the present application, schematically showing a first side of the flow field plate;
图3是图2的流场板的仰视图，其示意性地示出了流场板的与第一侧相反的第二侧；Figure 3 is a bottom view of the flow field plate of Figure 2 schematically showing a second side of the flow field plate opposite the first side;
图4是沿着图1的线I-I的示意性横截面视图，其示意性地示出的根据 本申请的一种型式的流场板的横截面；Figure 4 is a schematic cross-sectional view along line I-I of Figure 1 schematically showing a cross-section of one version of a flow field plate according to the present application;
图5是与图2类似的示意性横截面视图，其示意性地示出的根据本申请的另一种型式的流场板的横截面；FIG. 5 is a schematic cross-sectional view similar to FIG. 2 , schematically showing a cross-section of another type of flow field plate according to the present application;
图6示意性地示出了根据本申请的优选实施例的包括设置在两层背膜之间的第一导电粘合膜的叠层结构的俯视图；6 schematically illustrates a top view of a laminated structure including a first conductive adhesive film disposed between two backing films according to a preferred embodiment of the present application;
图7是图6的叠层结构的侧视图；Figure 7 is a side view of the laminated structure of Figure 6;
图8是图6的叠层结构的俯视图，其示意性地示出了在叠层结构中切出的第一图案。FIG. 8 is a top view of the laminated structure of FIG. 6 schematically showing a first pattern cut out in the laminated structure.
图9是与图2类似的俯视图，其中，第一导电粘合膜和第二粘合膜尚未粘接到流场板的金属板；Figure 9 is a top view similar to Figure 2, in which the first conductive adhesive film and the second adhesive film have not yet been bonded to the metal plate of the flow field plate;
图10是与图2和图9类似的俯视图，其中，第一导电粘合膜被粘接到流场板的金属板，而第二粘合膜尚未粘接到流场板的金属板；Figure 10 is a top view similar to Figures 2 and 9, in which the first conductive adhesive film is bonded to the metal plate of the flow field plate, and the second adhesive film has not yet been bonded to the metal plate of the flow field plate;
图11是图10的虚线区域A的放大视图，其示意性地示出了能够借助根据本申请的制造方法形成的一种流道结构；以及Figure 11 is an enlarged view of the dotted area A of Figure 10, which schematically illustrates a flow channel structure that can be formed by the manufacturing method according to the present application; and
图12是图10的虚线区域B的放大视图，其示意性地示出了能够借助根据本申请的制造方法形成的另一种流道结构。FIG. 12 is an enlarged view of the dotted area B of FIG. 10 , schematically showing another flow channel structure that can be formed by means of the manufacturing method according to the present application.
附图标记列表List of reference signs
1         电池单元1 battery unit
3         质子交换膜3 Proton exchange membrane
5         阴极扩散层5 Cathode diffusion layer
7         阴极催化层结构7 Cathode catalytic layer structure
9         阳极扩散层9 Anode diffusion layer
11        阳极催化层结构11 Anode catalytic layer structure
100       流场板100 flow field plate
101       金属板101 metal plate
101a      第一侧101a First side
101b      第二侧101b Second Side
101c      入口101c entrance
101d      出口101d Exit
101e      入口101e entrance
101f      出口101f Exit
101g      第一开口101g First opening
101h      第二开口101h Second opening
103       第一流场103 The first flow field
105       入口分配区105 Entrance allocation area
107       反应区107 reaction zone
107a1     侧壁107a1 side wall
107a2     底壁107a2 bottom wall
107a      第一流道107a First flow channel
107b      第一脊部107b first ridge
107b1     顶部107b1 Top
107b2     底部107b2 bottom
108       突出部108 Protrusion
109       出口汇集区109 Exit gathering area
111       第一导电粘合膜111 The first conductive adhesive film
113a      第二流道113a Second flow channel
113b      第二脊部113b Second ridge
113b1     顶部113b1 Top
115       第二流场115 Second flow field
117a      第三流道117a Third flow channel
117b      第三脊部117b third ridge
117b1     顶部117b1 Top
118       第三导电粘合膜118 The third conductive adhesive film
200       背膜200 back mask
300       叠层结构300 laminated structure
具体实施方式Detailed ways
下面结合示例详细描述本申请的一些优选实施例。本领域技术人员应理解到的是，这些实施例仅是示例性的，并不意味着对本申请形成任何限制。此外，在不冲突的情况下，本申请的实施例中的特征可以相互组合。在附图中，为简要起见而省略了其它的部件，但这并不表明本申请的流场板、双极板、燃料电池单元和燃料电池不可包括其它结构和部件。应理解到，附图中各结构和部件的尺寸、比例关系以及部件的数目均不作为对本 申请的限制。Some preferred embodiments of the present application are described in detail below with examples. Those skilled in the art should understand that these embodiments are only exemplary and are not meant to form any limitations on the application. Furthermore, features in the embodiments of the present application may be combined with each other without conflict. In the drawings, other components are omitted for the sake of simplicity, but this does not mean that the flow field plate, bipolar plate, fuel cell unit and fuel cell of the present application cannot include other structures and components. It should be understood that the size, proportional relationship, and number of components of each structure and component in the drawings are not intended to limit the present application.
燃料电池可以用于车辆中以提供电力，从而驱动车辆电机来提供动力或者使得车载***执行各种功能。图1示意性地示出了示例性燃料电池的电堆的两个电池单元1。示例性燃料电池是质子交换膜燃料电池(PEMFC)，并且其电堆由多个电池单元1堆叠而成。如以下将要详细描述的，根据本申请的优选实施例的方法制造的流场板100可被用于电池单元1，以用作阴极板和/或阳极板。例如，在一个电池单元1中，一块流场板100可用作阴极板，并且另一块流场板100可用作阳极板。又如，流场板100可以与其它流场板组合。Fuel cells can be used in vehicles to provide electricity to drive vehicle motors to provide power or to enable on-board systems to perform various functions. Figure 1 schematically shows two cells 1 of a stack of an exemplary fuel cell. An exemplary fuel cell is a proton exchange membrane fuel cell (PEMFC), and its stack is formed by stacking a plurality of battery cells 1 . As will be described in detail below, the flow field plate 100 manufactured according to the method of the preferred embodiment of the present application can be used in the battery unit 1 to serve as a cathode plate and/or an anode plate. For example, in one battery cell 1, one flow field plate 100 may be used as a cathode plate, and the other flow field plate 100 may be used as an anode plate. As another example, the flow field plate 100 can be combined with other flow field plates.
如图1所示，每个电池单元1通常由阴极板(图1中每个电池单元1左侧的流场板100)、阳极板(图1中每个电池单元1右侧的流场板100)、质子交换膜3、在阴极板与质子交换膜3之间的阴极扩散层5和阴极催化层结构7、在阳极板与质子交换膜3之间的阳极扩散层9和阳极催化层结构11。阴极扩散层5、阴极催化层结构7、阳极扩散层9、阳极催化层结构11与质子交换膜3通常被制成一体，并且被称为膜电极组件(MEA)。阴极扩散层5和阳极扩散层9分别用于支撑阴极催化层结构7和阳极催化层结构11，并且传输反应流体和反应产物(氢气、氧气/空气、水等)。如图4和图5所示意性地示出的，阴极板和阳极板上分别形成有阴极流场和阳极流场。多个电池单元1的阴极板的阴极流场能够组成电堆的阴极流道(未示出)，并且多个电池单元1的阳极板的阳极流场能够组成电堆的阳极流道(同样未示出)。As shown in Figure 1, each battery unit 1 usually consists of a cathode plate (the flow field plate 100 on the left side of each battery unit 1 in Figure 1), an anode plate (the flow field plate 100 on the right side of each battery unit 1 in Figure 1 100), proton exchange membrane 3, cathode diffusion layer 5 and cathode catalytic layer structure 7 between the cathode plate and proton exchange membrane 3, anode diffusion layer 9 and anode catalytic layer structure between the anode plate and proton exchange membrane 3 11. The cathode diffusion layer 5, cathode catalytic layer structure 7, anode diffusion layer 9, anode catalytic layer structure 11 and the proton exchange membrane 3 are usually made into one body and are called a membrane electrode assembly (MEA). The cathode diffusion layer 5 and the anode diffusion layer 9 are used to support the cathode catalytic layer structure 7 and the anode catalytic layer structure 11 respectively, and transport reaction fluids and reaction products (hydrogen, oxygen/air, water, etc.). As schematically shown in Figures 4 and 5, a cathode flow field and an anode flow field are respectively formed on the cathode plate and the anode plate. The cathode flow fields of the cathode plates of multiple battery units 1 can constitute the cathode flow channels of the stack (not shown), and the anode flow fields of the anode plates of multiple battery units 1 can constitute the anode flow channels of the stack (also not shown). Shows).
PEMFC的电化学反应发生在MEA中，主要涉及氢氧化(HOR)过程和氧还原(ORR)过程。H 2和O 2分别通过阳极扩散层9和阴极扩散层5传输到阳极催化层结构11和阴极催化层结构7中，H 2在阳极催化层结构11处在阳极催化剂的作用下失去电子，形成H +。H +通过质子交换膜3传递到阴极侧，在阴极催化层结构7处在阴极催化剂的作用下与O 2结合成H 2O。H 2O通过阴极扩散层5和阳极扩散层9传递到阴极流场和阳极流场中，随后通过阴极流道和阳极流道排出PEMFC。电子则通过外电路(未示出)流向阴极以形成电流。 The electrochemical reaction of PEMFC occurs in the MEA, mainly involving the hydrogen oxidation (HOR) process and the oxygen reduction (ORR) process. H 2 and O 2 are transmitted to the anode catalytic layer structure 11 and the cathode catalytic layer structure 7 through the anode diffusion layer 9 and the cathode diffusion layer 5 respectively. H 2 loses electrons at the anode catalytic layer structure 11 under the action of the anode catalyst, forming H + . H + is transferred to the cathode side through the proton exchange membrane 3, and is combined with O2 to form H2O at the cathode catalytic layer structure 7 under the action of the cathode catalyst. H 2 O is transferred into the cathode flow field and the anode flow field through the cathode diffusion layer 5 and the anode diffusion layer 9, and then is discharged from the PEMFC through the cathode flow channel and the anode flow channel. The electrons flow to the cathode through an external circuit (not shown) to form an electric current.
图2至图4示意性地示出了通过根据本申请的一个优选实施例的制造方法构造的流场板100。如图2和图3所示，流场板100包括金属板101，其具有相反的第一侧101a和第二侧101b。金属板101可以由铁基合金(不 锈钢)、轻金属及其合金(主要是钛及其合金、铝及其合金)制成。金属板101包括被配置成接收反应流体(在PEMFC中为反应气体，具体是氢气、氧气或空气)的入口101c、以及被配置成排出反应产物的出口101d。入口101c和出口101d是延伸穿过金属板101的开口。2 to 4 schematically illustrate a flow field plate 100 constructed by a manufacturing method according to a preferred embodiment of the present application. As shown in Figures 2 and 3, the flow field plate 100 includes a metal plate 101 having opposite first and second sides 101a, 101b. The metal plate 101 can be made of iron-based alloys (stainless steel), light metals and their alloys (mainly titanium and its alloys, aluminum and its alloys). The metal plate 101 includes an inlet 101c configured to receive a reaction fluid (in a PEMFC, a reaction gas, specifically hydrogen, oxygen or air), and an outlet 101d configured to discharge reaction products. The inlet 101c and the outlet 101d are openings extending through the metal plate 101.
如图2和图4所示，流场板100还包括形成于金属板101的第一侧101a上并且用于流通反应流体的第一流场103。第一流场103包括沿着反应气体流动方向依次设置的入口分配区105、反应区107和出口汇集区109。反应区107包括界定出第一流道107a的第一脊部107b。第一流道107a在入口分配区105与出口汇集区109之间延伸。第一流场103的入口分配区105被配置成靠近金属板101的入口101c设置并与入口101c连通以从入口101c接收反应气体，并且被配置成将反应气体分配到各个流道107a。出口汇集区109被配置成从第一流道107a汇集反应产物，并且被配置成靠近金属板101的出口101d设置并与出口101d连通，以将反应产物排出到出口101d。As shown in FIGS. 2 and 4 , the flow field plate 100 further includes a first flow field 103 formed on the first side 101 a of the metal plate 101 and used to circulate the reaction fluid. The first flow field 103 includes an inlet distribution area 105, a reaction area 107, and an outlet collection area 109 that are sequentially arranged along the reaction gas flow direction. Reaction zone 107 includes a first ridge 107b defining a first flow channel 107a. The first flow channel 107a extends between the inlet distribution area 105 and the outlet collection area 109. The inlet distribution area 105 of the first flow field 103 is configured to be disposed close to the inlet 101c of the metal plate 101 and communicate with the inlet 101c to receive the reaction gas from the inlet 101c, and is configured to distribute the reaction gas to each flow channel 107a. The outlet collection area 109 is configured to collect the reaction product from the first flow channel 107a, and is configured to be disposed close to the outlet 101d of the metal plate 101 and communicate with the outlet 101d to discharge the reaction product to the outlet 101d.
请继续参见图2和图4，流场板100还包括第一导电粘合膜111，第一导电粘合膜111呈对应于第一脊部107b的第一图案，并且在第一侧101a上粘接到金属板101，以使得第一脊部107b的从顶部107b1(图4)测量的至少10％(例如，10％、20％、30％、40％、50％、60％、70％、80％、90％、100％或其间的任何值)的高度由第一图案形成。如图4所最佳示出的，当流场板100用作阳极板或阴极板并且与MEA组装在一起时，第一导电粘合膜111可以将金属板101粘接到MEA的阴极扩散层5和阳极扩散层9中的相应扩散层。Continuing to refer to FIGS. 2 and 4 , the flow field plate 100 further includes a first conductive adhesive film 111 in a first pattern corresponding to the first ridges 107b and on the first side 101a Bonded to metal plate 101 such that at least 10% (eg, 10%, 20%, 30%, 40%, 50%, 60%, 70%) of first ridge 107b measured from top 107b1 (Fig. 4) , 80%, 90%, 100% or any value therebetween) of a height formed by the first pattern. As best shown in Figure 4, when flow field plate 100 is used as an anode plate or cathode plate and is assembled with a MEA, first conductive adhesive film 111 can bond metal plate 101 to the cathode diffusion layer of the MEA 5 and the corresponding diffusion layer in the anode diffusion layer 9.
如下文将要结合用于制造流场板100的方法具体描述的，本发明人已经意识到，根据本申请的流场板100的前述配置可以提供诸多优势：(1)第一导电粘合膜111能够在燃料电池的长期运行期间在金属板101与阴极扩散层5和阳极扩散层9中的相应扩散层之间保持稳定的粘接力，以保持接触电阻基本恒定，这有助于改善流场板100的接触导电性，从而提高了燃料电池的可靠性和发电性能；(2)设置第一导电粘合膜111能够降低对在金属板101与阴极扩散层5和阳极扩散层9中的相应扩散层之间施加额外的保持力的需求，提高了燃料电池的可靠性；(3)第一导电粘合膜111覆盖了金属板101的一部分，有助于防止在金属板101的该部分上发生腐蚀，从而提高流场板100的使用寿命；(4)第一导电粘合膜111通过粘接固定到金属板101，消除了对金属板101的复杂耗时的表面改性工艺，这使 得流场板100易于制造，降低了制造成本，从而便利大规模生产流场板100；(5)第一脊部107b的从顶部107b1测量的至少10％的高度由第一图案形成，这使得第一导电粘合膜111形成了反应区107流场的至少一部分，这有助于减少甚至消除在制造流场板100的反应区107时所需的冲压工作，并且提高了流场板100的设计和制造的灵活性。As will be described in detail below in connection with the method for manufacturing the flow field plate 100, the inventor has realized that the aforementioned configuration of the flow field plate 100 according to the present application can provide many advantages: (1) First conductive adhesive film 111 A stable bonding force can be maintained between the metal plate 101 and the corresponding diffusion layers in the cathode diffusion layer 5 and the anode diffusion layer 9 during long-term operation of the fuel cell to keep the contact resistance substantially constant, which helps to improve the flow field The contact conductivity of the plate 100 improves the reliability and power generation performance of the fuel cell; (2) providing the first conductive adhesive film 111 can reduce the interaction between the metal plate 101 and the cathode diffusion layer 5 and the anode diffusion layer 9 The need to apply additional holding force between the diffusion layers improves the reliability of the fuel cell; (3) the first conductive adhesive film 111 covers a part of the metal plate 101, helping to prevent damage to that part of the metal plate 101 Corrosion occurs, thereby increasing the service life of the flow field plate 100; (4) the first conductive adhesive film 111 is fixed to the metal plate 101 by bonding, eliminating the complex and time-consuming surface modification process of the metal plate 101, which makes The flow field plate 100 is easy to manufacture, reducing the manufacturing cost, thereby facilitating the mass production of the flow field plate 100; (5) at least 10% of the height of the first ridge 107b measured from the top 107b1 is formed by the first pattern, which makes the A conductive adhesive film 111 forms at least a portion of the flow field of the reaction zone 107, which helps reduce or even eliminate the stamping work required when manufacturing the reaction zone 107 of the flow field plate 100, and improves the design of the flow field plate 100. and manufacturing flexibility.
下面将结合图4至图10具体描述根据本申请的用于制造流场板100的示例性方法。图9是金属板101的俯视图，其示意性地示出了金属板101的第一侧101a。金属板101已经形成有入口101c和出口101d。金属板101的入口101c和出口101d可以通过诸如机加工、冲压等任何本领域中已知的工艺形成。An exemplary method for manufacturing the flow field plate 100 according to the present application will be described in detail below with reference to FIGS. 4 to 10 . FIG. 9 is a top view of the metal plate 101 schematically showing the first side 101 a of the metal plate 101 . The metal plate 101 has been formed with an inlet 101c and an outlet 101d. The inlet 101c and the outlet 101d of the metal plate 101 may be formed by any process known in the art, such as machining, stamping, or the like.
根据本申请的用于制造流场板100的方法包括在金属板101的第一侧101a上形成用于流通反应流体的第一流场103。如上所述，第一流场103的反应区107包括界定出第一流道107a的第一脊部107b。形成第一流场103包括以下步骤：(1)在第一导电粘合膜111中切出对应于第一脊部107b的第一图案(图8)；以及(2)将切出的第一图案在第一侧101a上粘接到金属板101，以使得第一脊部107b的从顶部测量的至少10％的高度由第一图案形成(图10)。可以理解到，根据本申请的制造方法能够提供上述优势(1)至(5)。The method for manufacturing the flow field plate 100 according to the present application includes forming a first flow field 103 for flowing a reaction fluid on the first side 101a of the metal plate 101. As mentioned above, the reaction zone 107 of the first flow field 103 includes the first ridge 107b defining the first flow channel 107a. Forming the first flow field 103 includes the following steps: (1) cutting a first pattern corresponding to the first ridge 107b in the first conductive adhesive film 111 (FIG. 8); and (2) cutting out the first pattern 107b in the first conductive adhesive film 111; The pattern is bonded to the metal plate 101 on the first side 101a such that at least 10% of the height of the first ridge 107b measured from the top is formed by the first pattern (Fig. 10). It can be understood that the manufacturing method according to the present application can provide the above advantages (1) to (5).
根据本申请的制造方法提高了流场板100的设计和制造的灵活性。例如，图11和图12示出了能够通过本申请的制造方法形成的两种流道结构。图11示出了具有缩口结构的第一流道107a。第一流道107a由第一脊部107b的形状界定。具体而言，第一流道107a的通流面积沿着反应流体流动方向(如图中的虚线箭头所指示的)先减小后增大，从而加速反应流体或反应产物的流动。在本文中，除非另有说明，否则“通流面积”是指部件或部分用于流通流体的通道的有效截面积。这种缩口结构可以被设置在第一流场103中的期望位置，以实现加速反应流体或反应产物流动的作用。例如，这种缩口结构可以被设置在阴极流场的反应区的下游位置，以加速排出反应产物。图12示出了具有扰流结构的第一流道107a。具体而言，第一流道107a的侧壁(即，第一脊部107b)上可以设置有突出到第一流道107a中的突出部108，以对反应流体起到扰流的作用。这有助于增强反应区107中的反应。The manufacturing method according to the present application improves the flexibility in the design and manufacturing of the flow field plate 100 . For example, Figures 11 and 12 illustrate two flow channel structures that can be formed by the manufacturing method of the present application. Figure 11 shows the first flow channel 107a with a constriction structure. The first flow channel 107a is defined by the shape of the first ridge 107b. Specifically, the flow area of the first flow channel 107a first decreases and then increases along the reaction fluid flow direction (indicated by the dotted arrow in the figure), thereby accelerating the flow of the reaction fluid or reaction product. As used herein, unless otherwise stated, "flow area" refers to the effective cross-sectional area of a passage for fluid flow in a component or portion. This constriction structure can be disposed at a desired position in the first flow field 103 to achieve the effect of accelerating the flow of the reaction fluid or reaction product. For example, this constriction structure can be disposed downstream of the reaction zone of the cathode flow field to accelerate the discharge of reaction products. Figure 12 shows the first flow channel 107a with a spoiler structure. Specifically, a protrusion 108 protruding into the first flow channel 107a may be provided on the side wall of the first flow channel 107a (ie, the first ridge 107b) to disrupt the flow of the reaction fluid. This helps enhance the reaction in reaction zone 107.
图11和图12所示的流道结构均难以通过诸如冲压和机加工之类的传 统工艺形成。相反，借助于本申请的制造方法，能够容易且低成本地形成具有缩口结构和扰流结构的第一流道107a。应理解到，本申请的制造方法也能够容易且低成本地形成其它难以通过诸如冲压和机加工之类的传统工艺形成的流道结构，并且本申请不限于此。The flow channel structures shown in Figures 11 and 12 are difficult to form through traditional processes such as stamping and machining. On the contrary, with the help of the manufacturing method of the present application, the first flow channel 107a having a constriction structure and a spoiler structure can be formed easily and at low cost. It should be understood that the manufacturing method of the present application can also easily and cost-effectively form other flow channel structures that are difficult to form through traditional processes such as stamping and machining, and the present application is not limited thereto.
此外，相比于诸如冲压和机加工之类的传统工艺，本申请的制造方法能够容易且低成本地形成各种复杂的流场图案，并且减少甚至省去了冲压模具设计和制造的成本。In addition, compared with traditional processes such as stamping and machining, the manufacturing method of the present application can easily and cost-effectively form various complex flow field patterns, and reduce or even eliminate the cost of stamping die design and manufacturing.
重要的是，本申请的制造方法能够提高流场板100的设计和制造的灵活性。Importantly, the manufacturing method of the present application can improve the design and manufacturing flexibility of the flow field plate 100 .
在一些实施例中，第一脊部107b的从顶部107b1测量的全部(100％)高度可以由第一导电粘合膜111(即，第一图案)形成。如图5和图9所示，金属板101的对应于反应区107的第一区域是基本平坦的。如在本文中所使用的，“基本平坦”是指在制造公差允许的范围内。在这种情况下，第一图案可以被配置成使得第一脊部107b的从顶部107b1测量的全部高度由第一图案形成。相应地，将切出的第一图案在第一侧101a上粘接到金属板101的步骤包括将切出的第一图案在第一侧101a上粘接到金属板101的第一区域上，以形成整个第一脊部107b。这种方法能够进一步提高流场板100的设计和制造的灵活性。例如，请参见图5中下部的流场板100(该流场板100用作阴极板)的结构，第一脊部107b的从顶部107b1测量的全部高度由第一导电粘合膜111(即，第一图案)形成。在这种情况下，第一流道107a的侧壁107a1可以垂直于第一流道107a的底壁107a2，即，拔模角为0。这种流道结构有助于提高反应区107的流道密度，从而提高流场板100的性能。这种流道结构难以通过诸如冲压和机加工之类的传统工艺形成。相反，借助于本申请的制造方法，能够容易且低成本地形成侧壁107a1垂直于第一流道107a的底壁107a2的第一流道107a。In some embodiments, the entire (100%) height of first ridge 107b measured from top 107b1 may be formed from first conductive adhesive film 111 (ie, the first pattern). As shown in Figures 5 and 9, the first area of the metal plate 101 corresponding to the reaction zone 107 is substantially flat. As used herein, "substantially flat" means within manufacturing tolerances. In this case, the first pattern may be configured such that the entire height of the first ridge 107b measured from the top 107b1 is formed by the first pattern. Accordingly, the step of bonding the cut-out first pattern to the metal plate 101 on the first side 101a includes bonding the cut-out first pattern to the first area of the metal plate 101 on the first side 101a, To form the entire first ridge 107b. This method can further improve the design and manufacturing flexibility of the flow field plate 100 . For example, referring to the structure of the lower flow field plate 100 in FIG. 5 (which acts as a cathode plate), the entire height of the first ridge 107b measured from the top 107b1 is formed by the first conductive adhesive film 111 (i.e. , the first pattern) is formed. In this case, the side wall 107a1 of the first flow channel 107a may be perpendicular to the bottom wall 107a2 of the first flow channel 107a, that is, the draft angle is 0. This flow channel structure helps to increase the flow channel density in the reaction zone 107, thereby improving the performance of the flow field plate 100. This runner structure is difficult to form through traditional processes such as stamping and machining. On the contrary, with the manufacturing method of the present application, the first flow channel 107a with the side wall 107a1 perpendicular to the bottom wall 107a2 of the first flow channel 107a can be formed easily and at low cost.
在其它部分实施例中，如图4和图5所示，第一脊部107b的从与顶部107b1相反的底部107b2测量的一部分高度可以通过对金属板101冲压来形成。具体而言，请参见图5中上部的流场板100(该流场板100用作阳极板)的结构，第一脊部107b由第一部分和第二部分构成。第一部分通过对金属板101进行冲压而形成，并且第二部分通过将第一导电粘合膜111粘接到第一部分而形成。也就是说，形成第一流场103还包括通过对金属板101冲压来形成第一脊部107b的第一部分的步骤，并且将切出的第一图案在第 一侧101a上粘接到金属板101的步骤包括将切出的第一图案粘接到该第一部分上，以形成该第二部分，从而形成整个第一脊部107b。In other embodiments, as shown in FIGS. 4 and 5 , a portion of the height of first ridge 107 b measured from bottom 107 b 2 opposite top 107 b 1 may be formed by stamping metal plate 101 . Specifically, please refer to the structure of the upper flow field plate 100 in FIG. 5 (the flow field plate 100 is used as an anode plate). The first ridge 107b is composed of a first part and a second part. The first part is formed by punching the metal plate 101, and the second part is formed by bonding the first conductive adhesive film 111 to the first part. That is, forming the first flow field 103 further includes the step of forming the first part of the first ridge 107b by punching the metal plate 101, and bonding the cut out first pattern to the metal plate on the first side 101a. Step 101 includes gluing the cut out first pattern to the first portion to form the second portion, thereby forming the entire first ridge 107b.
第一导电粘合膜111包括第一粘性材料以及分散在第一粘性材料中的第一导电颗粒。第一导电颗粒可以通过任何合适的工艺以任何合适的重量百分比分散在第一粘性材料中。这具体取决于第一粘性材料自身的导电性质以及第一导电颗粒的密度和导电率。优选地，第一粘性材料可以是聚甲基丙烯酸甲酯(PMMA)、亚克力胶、聚吡咯、环氧树脂、硅树脂、聚酰胺、聚酰亚胺或氟橡胶。优选地，第一导电颗粒可以是金(Au)、石墨、诸如科琴黑之类的高比表面碳材料、炭黑、石墨烯、单壁碳纳米管、多壁碳纳米管、氮化铬(CrN)、氮化钛(TiN)。应理解到，本申请不限于此，第一粘性材料和第一导电颗粒可以是任何使得第一导电粘合膜111能够在金属板101与阴极扩散层5和阳极扩散层9中的相应扩散层之间保持稳定的粘接力并保持基本恒定的接触电阻的合适材料。The first conductive adhesive film 111 includes a first adhesive material and first conductive particles dispersed in the first adhesive material. The first conductive particles may be dispersed in the first viscous material in any suitable weight percent by any suitable process. This specifically depends on the conductive properties of the first viscous material itself and the density and conductivity of the first conductive particles. Preferably, the first adhesive material may be polymethyl methacrylate (PMMA), acrylic glue, polypyrrole, epoxy resin, silicone resin, polyamide, polyimide or fluorine rubber. Preferably, the first conductive particles may be gold (Au), graphite, high specific surface carbon materials such as Ketjen black, carbon black, graphene, single-walled carbon nanotubes, multi-walled carbon nanotubes, chromium nitride (CrN), titanium nitride (TiN). It should be understood that the application is not limited thereto, and the first adhesive material and the first conductive particles may be any corresponding diffusion layers that enable the first conductive adhesive film 111 to be formed in the metal plate 101 and the cathode diffusion layer 5 and the anode diffusion layer 9 Suitable materials that maintain stable adhesion and maintain substantially constant contact resistance.
在一些实施例中，第一导电粘合膜111被配置成将金属板101粘接到阴极扩散层5和阳极扩散层9中的相应扩散层，以在相应扩散层与金属板101之间提供至少2N/cm(例如，2N/cm、2.5N/cm、3N/cm或更高)的粘接力。这有助于在金属板101与相应扩散层之间保持稳定的粘接力并保持基本恒定的接触电阻。此外，这也有助于在金属板101与相应扩散层之间施加额外的保持力的需求。In some embodiments, the first conductive adhesive film 111 is configured to bond the metal plate 101 to a corresponding one of the cathode diffusion layer 5 and the anode diffusion layer 9 to provide a gap between the corresponding diffusion layer and the metal plate 101 Adhesion force of at least 2N/cm (eg, 2N/cm, 2.5N/cm, 3N/cm or higher). This helps maintain a stable adhesion between the metal plate 101 and the corresponding diffusion layer and maintain a substantially constant contact resistance. Furthermore, this also contributes to the need to apply additional holding forces between the metal plate 101 and the corresponding diffusion layer.
如图4和图5所示，每个第一流道107a由两个侧壁107a1以及在两个侧壁107a1之间延伸的底壁107a2界定。两个侧壁107a1由相邻的两个第一脊部107b形成，并且底壁107a2由金属板101的在相邻的两个第一脊部107b之间的部分形成。第一图案(即，导电粘合膜111)不与金属板101的部分交叠。应理解到，金属板101的在相邻的两个第一脊部107b之间的部分或者整个金属板101可以经表面处理，以使其具备耐腐蚀性。As shown in Figures 4 and 5, each first flow channel 107a is defined by two side walls 107a1 and a bottom wall 107a2 extending between the two side walls 107a1. The two side walls 107a1 are formed by two adjacent first ridges 107b, and the bottom wall 107a2 is formed by a portion of the metal plate 101 between the two adjacent first ridges 107b. The first pattern (ie, the conductive adhesive film 111 ) does not overlap with the portion of the metal plate 101 . It should be understood that the portion of the metal plate 101 between two adjacent first ridges 107b or the entire metal plate 101 may be surface treated to provide corrosion resistance.
在一些实施例中，如图6至图8所示，在第一导电粘合膜111中切出对应于第一脊部107b的第一图案的步骤可以包括将第一导电粘合膜111设置在两层背膜200之间以形成叠层结构300、以及在叠层结构300中切出对应于第一脊部107b的第一图案。图6示意性地示出了包括设置在两层背膜200之间的第一导电粘合膜111的叠层结构300的俯视图，图7是图6的叠层结构的侧视图，并且图8是图6的叠层结构300的俯视图，其示意性地示出了在叠层结构300中切出的第一图案。随后，将切出的第一图案在第 一侧101a上粘接到金属板101的步骤可以包括将切出的第一图案从背膜200剥离并在第一侧101a上粘接到金属板101(如图10所示)。背膜200可以由这样的材料制成，该材料适于在对第一导电粘合膜111切出第一图案期间保持第一导电粘合膜111，并且在对第一导电粘合膜111切出第一图案之后容易地从其剥离第一导电粘合膜111而不会发生损坏。In some embodiments, as shown in FIGS. 6 to 8 , the step of cutting out the first pattern corresponding to the first ridge 107b in the first conductive adhesive film 111 may include disposing the first conductive adhesive film 111 A laminated structure 300 is formed between the two back films 200, and a first pattern corresponding to the first ridge portion 107b is cut in the laminated structure 300. FIG. 6 schematically shows a top view of a laminated structure 300 including the first conductive adhesive film 111 disposed between two layers of backing films 200 , FIG. 7 is a side view of the laminated structure of FIG. 6 , and FIG. 8 is a top view of the laminated structure 300 of FIG. 6 , schematically showing the first pattern cut out in the laminated structure 300 . Subsequently, the step of bonding the cut-out first pattern to the metal plate 101 on the first side 101a may include peeling the cut-out first pattern from the back film 200 and bonding it to the metal plate 101 on the first side 101a (As shown in Figure 10). The back film 200 may be made of a material suitable for holding the first conductive adhesive film 111 during cutting of the first pattern, and for holding the first conductive adhesive film 111 during cutting. The first conductive adhesive film 111 is easily peeled off from the first pattern without damage.
返回参见图2，第一流场103的入口分配区105和出口汇集区109能够以与反应区107类似的方式形成。具体而言，入口分配区105和出口汇集区109中的至少一者包括界定出第二流道113a的第二脊部113b。流场板100还包括第二粘合膜(未标出)，第二粘合膜呈对应于第二脊部113b的第二图案，并且在第一侧101a上粘接到金属板101，以使得第二脊部113b的从顶部113b1测量的至少一部分(例如，10％、20％、30％、40％、50％、60％、70％、80％、90％、100％或其间的任何值)高度由第二图案形成。换言之，形成第一流场103还包括以下步骤：在第二粘合膜中切出对应于第二脊部113b的第二图案；以及将切出的第二图案在第一侧101a上粘接到金属板101，以使得第二脊部113b的从顶部113b1测量的至少一部分高度由第二图案形成。Referring back to FIG. 2 , the inlet distribution zone 105 and the outlet collection zone 109 of the first flow field 103 can be formed in a similar manner to the reaction zone 107 . Specifically, at least one of the inlet distribution area 105 and the outlet collection area 109 includes a second ridge 113b that defines a second flow channel 113a. The flow field plate 100 also includes a second adhesive film (not labeled) in a second pattern corresponding to the second ridges 113b and bonded to the metal plate 101 on the first side 101a to Such that at least a portion of second ridge 113b measured from top 113b1 (e.g., 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, or any therebetween value) height is formed by the second pattern. In other words, forming the first flow field 103 further includes the steps of: cutting out a second pattern corresponding to the second ridge 113b in the second adhesive film; and bonding the cut out second pattern on the first side 101a to the metal plate 101 such that at least a portion of the height of the second ridge 113b measured from the top 113b1 is formed by the second pattern.
通过这种方式，可以提供诸多优势：(1)第二粘合膜可以进一步帮助在金属板101与阴极扩散层5和阳极扩散层9中的相应扩散层之间保持稳定的粘接力，从而保持接触电阻基本恒定，这有助于改善流场板100的接触导电性，从而提高使用流场板100的燃料电池的性能；(2)第二脊部113b的从顶部113b1测量的至少一部分高度由第二图案形成，这使得第二粘合膜形成了入口分配区105和出口汇集区109中的所述至少一者的流场的至少一部分，这有助于减少甚至消除在制造流场板100的入口分配区105和出口汇集区109中的所述至少一者时所需的冲压工作，并且提高流场板100的设计和制造的灵活性。In this way, many advantages can be provided: (1) The second adhesive film can further help maintain stable adhesion between the metal plate 101 and the corresponding diffusion layers in the cathode diffusion layer 5 and the anode diffusion layer 9, thereby Keeping the contact resistance substantially constant helps to improve the contact conductivity of the flow field plate 100, thereby improving the performance of the fuel cell using the flow field plate 100; (2) at least a portion of the height of the second ridge 113b measured from the top 113b1 Formed by the second pattern, this allows the second adhesive film to form at least a portion of the flow field of at least one of the inlet distribution area 105 and the outlet collection area 109, which helps to reduce or even eliminate the need for manufacturing the flow field plate. At least one of the inlet distribution area 105 and the outlet collection area 109 of 100 eliminates the required stamping work and increases flexibility in the design and manufacture of the flow field plate 100 .
优选地，第二粘合膜可以是表面涂敷有亚克力胶的聚萘二甲酸乙二醇酯(PEN)、聚对苯二甲酸乙二醇酯(PET)或聚酰亚胺(PI)膜。应理解到，第二粘合膜不限于此，并且也可以由其它合适的材料制成。Preferably, the second adhesive film may be a polyethylene naphthalate (PEN), polyethylene terephthalate (PET) or polyimide (PI) film surface-coated with acrylic glue . It should be understood that the second adhesive film is not limited thereto and may also be made of other suitable materials.
在一些实施例中，如图9所示，金属板101的入口分配区105和出口汇集区109中的至少一者的第二区域是基本平坦的。可以设想到，第二粘合膜可以被粘接到第二区域上(图2)，并且被配置成使得第二脊部113b的从顶部113b1测量的全部高度由第二图案形成。换言之，第二图案被配 置成使得第二脊部的从顶部107b1测量的全部高度由第二图案形成，并且将切出的第二图案在第一侧101a上粘接到金属板101的步骤包括将切出的第二图案在第一侧101a上粘接到金属板101的第二区域上，以形成整个第二脊部113b。应理解到，如上文结合反应区107描述的，在此描述的方法能够容易且低成本地形成入口分配区105和出口汇集区109的难以通过诸如冲压和机加工之类的传统工艺形成的流道结构和流道图案。还应理解到，在其它部分实施例中，第二脊部113b的从与顶部107b1相反的底部测量的一部分可以通过对金属板101冲压来形成，并且第二脊部113b的其余部分通过将第二粘合膜粘接到该部分上而形成。借此，能够形成整个第二脊部113b。In some embodiments, as shown in Figure 9, the second area of at least one of the inlet distribution area 105 and the outlet collection area 109 of the metal plate 101 is substantially flat. It is contemplated that a second adhesive film may be bonded to the second area (Fig. 2) and configured such that the entire height of the second ridge 113b measured from the top 113b1 is formed by the second pattern. In other words, the second pattern is configured such that the entire height of the second ridge measured from the top 107b1 is formed by the second pattern, and the step of bonding the cut-out second pattern to the metal plate 101 on the first side 101a includes The cut out second pattern is bonded on the first side 101a to the second area of the metal plate 101 to form the entire second ridge 113b. It will be appreciated that, as described above in connection with reaction zone 107, the methods described herein enable easy and cost-effective formation of flows of inlet distribution zone 105 and outlet collecting zone 109 that are difficult to form by conventional processes such as stamping and machining. Channel structure and flow channel pattern. It should also be understood that in other embodiments, a portion of the second ridge 113b measured from the bottom opposite the top 107b1 may be formed by stamping the metal plate 101 and the remaining portion of the second ridge 113b by stamping the second ridge 113b from the bottom 107b1. Two adhesive films are bonded to this part to form. Thereby, the entire second ridge portion 113b can be formed.
请返回参见图2和图3，金属板101还包括被配置成接收冷却流体的入口101e、以及被配置成排出冷却流体的出口101f。此外，金属板101还包括被配置成用于分别与相配合的另一金属板101的反应流体入口和反应产物出口相连通的第一开口101g和第二开口101h。入口101e、出口101f、第一开口101g和第二开口101h均为延伸穿过金属板101的开口。Referring back to FIGS. 2 and 3 , the metal plate 101 further includes an inlet 101 e configured to receive cooling fluid, and an outlet 101 f configured to discharge the cooling fluid. In addition, the metal plate 101 further includes a first opening 101g and a second opening 101h configured to communicate with the reaction fluid inlet and the reaction product outlet of another matched metal plate 101, respectively. The inlet 101e, the outlet 101f, the first opening 101g and the second opening 101h are all openings extending through the metal plate 101.
如图3所示，流场板100还可以包括形成于金属板101的与第一侧101a相反的第二侧101b上并且用于流通冷却流体的第二流场115。第二流场115包括界定出第三流道117a的第三脊部117b。第三流道117a在入口101e与出口101f之间延伸。冷却流体从入口101e流入第二流场115，并且从出口101f离开第二流场115。As shown in FIG. 3 , the flow field plate 100 may further include a second flow field 115 formed on the second side 101 b of the metal plate 101 opposite to the first side 101 a and used to circulate the cooling fluid. The second flow field 115 includes a third ridge 117b defining a third flow channel 117a. The third flow channel 117a extends between the inlet 101e and the outlet 101f. Cooling fluid flows into the second flow field 115 from the inlet 101e and exits the second flow field 115 from the outlet 101f.
可以设想到，第二流场115能够以与反应区107类似的方式形成。具体而言，流场板100还包括第三导电粘合膜118(图4和图5)，该第三导电粘合膜118呈对应于第三脊部117b的第三图案，并且在第二侧101b上粘接到金属板101，以使得第三脊部117b的从顶部117b1测量的至少10％(例如，10％、20％、30％、40％、50％、60％、70％、80％、90％、100％或其间的任何值)的高度由第三图案形成。It is contemplated that the second flow field 115 can be formed in a similar manner to the reaction zone 107 . Specifically, the flow field plate 100 further includes a third conductive adhesive film 118 ( FIGS. 4 and 5 ) having a third pattern corresponding to the third ridge portion 117 b and in the second Side 101b is bonded to metal plate 101 such that at least 10% of third ridge 117b measured from top 117b1 (e.g., 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% or any value therebetween) of the height is formed by the third pattern.
换言之，本申请的用于形成流场板100的方法还包括在金属板101的与第一侧101a相反的第二侧101b上形成用于流通冷却流体的第二流场115。形成第二流场115包括以下步骤：在第三导电粘合膜118中切出对应于第三脊部117b的第三图案；以及将切出的第三图案在第二侧101b上粘接到金属板101，以使得第三脊部117b的从顶部117b1测量的至少10％的高度由第三图案形成。In other words, the method for forming the flow field plate 100 of the present application further includes forming a second flow field 115 for circulating cooling fluid on the second side 101b of the metal plate 101 opposite to the first side 101a. Forming the second flow field 115 includes the steps of: cutting a third pattern corresponding to the third ridge 117b in the third conductive adhesive film 118; and bonding the cut-out third pattern to the second side 101b. The metal plate 101 is such that at least 10% of the height of the third ridge 117b measured from the top 117b1 is formed by the third pattern.
通过这种方式，可以提供诸多优势：(1)在将两块流场板100以第一流场103彼此背对的方式固定在一起形成双极板时，第三导电粘合膜118可以在两块流场板100之间保持稳定的粘接力，从而保持接触电阻基本恒定；(2)第三脊部117b的从顶部117b1测量的至少10％的高度由第三图案形成，这使得第三导电粘合膜118形成了用于流通冷却流体的第二流场115的至少一部分，这有助于减少甚至消除在制造流场板100的第二流场115时所需的冲压工作，并且提高流场板100的设计和制造的灵活性。In this way, many advantages can be provided: (1) When two flow field plates 100 are fixed together to form a bipolar plate in such a way that the first flow field 103 faces away from each other, the third conductive adhesive film 118 can be A stable bonding force is maintained between the two flow field plates 100, thereby keeping the contact resistance substantially constant; (2) at least 10% of the height of the third ridge 117b measured from the top 117b1 is formed by the third pattern, which makes the third ridge 117b The tri-conductive adhesive film 118 forms at least a portion of the second flow field 115 for circulating cooling fluid, which helps reduce or even eliminate the stamping work required in manufacturing the second flow field 115 of the flow field plate 100, and Improved design and manufacturing flexibility of the flow field plate 100 .
第三导电粘合膜118包括第三粘性材料以及分散在第三粘性材料中的第二导电颗粒。第二导电颗粒可以通过任何合适的工艺以任何合适的重量百分比分散在第三粘性材料中。这具体取决于第三粘性材料自身的导电性质以及第二导电颗粒的密度和导电率。优选地，第三粘性材料为酚醛树脂或环氧树脂。优选地，第二导电颗粒为膨胀石墨或其它高导电碳材料。The third conductive adhesive film 118 includes a third adhesive material and second conductive particles dispersed in the third adhesive material. The second conductive particles may be dispersed in the third viscous material in any suitable weight percent by any suitable process. This depends specifically on the conductive properties of the third viscous material itself and the density and conductivity of the second conductive particles. Preferably, the third adhesive material is phenolic resin or epoxy resin. Preferably, the second conductive particles are expanded graphite or other highly conductive carbon materials.
可以设想到，在一些实施例中，金属板101的对应于第二流场115的第三区域是基本平坦的。第三图案粘接到第三区域上，并且被配置成使得第三脊部117b的从顶部117b1测量的全部高度由第三图案形成。换言之，第三图案被配置成使得第三脊部117b的从顶部117b1测量的全部高度由第三图案形成，并且将切出的第三图案在第二侧101b上粘接到金属板101的步骤包括将切出的第三图案在第二侧101b上粘接到金属板101的三区域上，以形成整个第三脊部117b。应理解到，如上文结合反应区107描述的，在此描述的方法能够容易且低成本地形成用于流通冷却流体的第二流场115的难以通过诸如冲压和机加工之类的传统工艺形成的流道结构和流道图案。还应理解到，在其它部分实施例中，第三脊部117b的从与顶部117b1相反的底部测量的一部分可以通过对金属板101冲压来形成(例如，在冲压第一脊部107b的同时)，并且第三脊部117b的其余部分通过将第三导电粘合膜118粘接到该部分上而形成。借此，能够形成整个第三脊部117b。It is contemplated that in some embodiments, the third region of the metal plate 101 corresponding to the second flow field 115 is substantially flat. The third pattern is bonded to the third area and is configured such that the entire height of third ridge 117b measured from top 117b1 is formed by the third pattern. In other words, the third pattern is configured such that the entire height of the third ridge 117b measured from the top 117b1 is formed by the third pattern, and the step of bonding the cut-out third pattern to the metal plate 101 on the second side 101b This involves bonding the cut out third pattern to three areas of the metal plate 101 on the second side 101b to form the entire third ridge 117b. It will be appreciated that, as described above in connection with reaction zone 107, the methods described herein enable easy and cost-effective formation of second flow field 115 for circulating cooling fluid that is difficult to form by conventional processes such as stamping and machining. The flow channel structure and flow channel pattern. It should also be understood that in other embodiments, a portion of the third ridge 117b measured from the bottom opposite the top 117b1 may be formed by stamping the metal plate 101 (eg, at the same time as the first ridge 107b is stamped) , and the remaining portion of the third ridge portion 117b is formed by bonding the third conductive adhesive film 118 to this portion. Thereby, the entire third ridge portion 117b can be formed.
根据前述方法制造的流场板100可以用作阳极板或阴极板。如图1所示意性地示出的，相邻两个燃料电池单元1中的一个燃料电池单元1的阳极板可以在组装电堆之前与另一个燃料电池单元1的阴极板固定在一起，以形成双极板。换言之，利用前述方法制造的阴极板和阳极板能够以第一流场103彼此背对的方式固定在一起，以形成双极板。在一些实施例中，阴极板和阳极板可以均具有用于流通冷却流体的第二流场115，并且阴极板的第二流场115和阳极板的第二流场115可以相互配合，共同形成用于流 通冷却流体的流场。在其它部分实施例中，阴极板和阳极板中的仅一个具有用于流通冷却流体的第二流场115，并且该第二流场115在阴极板与阳极板用于流通冷却流体。The flow field plate 100 manufactured according to the aforementioned method can be used as an anode plate or a cathode plate. As schematically shown in FIG. 1 , the anode plate of one fuel cell unit 1 of two adjacent fuel cell units 1 can be fixed together with the cathode plate of the other fuel cell unit 1 before assembling the stack. Form bipolar plates. In other words, the cathode plate and the anode plate manufactured by the aforementioned method can be fixed together with the first flow field 103 facing away from each other to form a bipolar plate. In some embodiments, both the cathode plate and the anode plate may have a second flow field 115 for circulating cooling fluid, and the second flow field 115 of the cathode plate and the second flow field 115 of the anode plate may cooperate with each other to jointly form A flow field for circulating cooling fluid. In some other embodiments, only one of the cathode plate and the anode plate has a second flow field 115 for circulating the cooling fluid, and the second flow field 115 is used to circulate the cooling fluid between the cathode plate and the anode plate.
在一些实施例中，对于同一个双极板，阴极板的第一流场103的第一脊部107b的全部高度由第一导电粘合膜111形成，而阳极板的第一流场103的第一脊部107b的从顶部107b1测量的10％至50％(例如，10％、20％、30％、40％、50％或其间的任何值)的高度由第一导电粘合膜111形成。在这种情况下，该阳极板的第一流场103的第一脊部107b的其余部分通过冲压形成。在形成第一脊部107b的其余部分的同时，能够在该阳极板的形成有第一流场103的第一侧101a相反第二侧101b上形成用于流通冷却流体的第二流场115的至少一部分。阴极板的第一流场103用作阴极流场，并且阳极板的第一流场103用作阳极流场。在反应期间，阴极侧的反应产物包括水，需要通过阴极流场将水迅速排出反应区107。将阴极板的第一流场103(阴极流场)的第一脊部107b的全部高度由第一导电粘合膜111形成是有利的，因为这使得在阴极流场中形成各种有利于排水的流道结构，而传统的冲压难以形成这种流道结构。In some embodiments, for the same bipolar plate, the entire height of the first ridge 107b of the cathode plate's first flow field 103 is formed by the first conductive adhesive film 111, while the entire height of the first flow field 103 of the anode plate is formed by the first conductive adhesive film 111. A height of 10% to 50% (eg, 10%, 20%, 30%, 40%, 50%, or any value therebetween) of first ridge 107b measured from top 107b1 is formed by first conductive adhesive film 111 . In this case, the remainder of the first ridge 107b of the first flow field 103 of the anode plate is formed by stamping. While the remaining portion of the first ridge 107b is formed, a second flow field 115 for circulating cooling fluid can be formed on the second side 101b of the anode plate opposite to the first side 101a where the first flow field 103 is formed. At least part of it. The first flow field 103 of the cathode plate serves as the cathode flow field, and the first flow field 103 of the anode plate serves as the anode flow field. During the reaction, the reaction products on the cathode side include water, and the water needs to be quickly discharged from the reaction zone 107 through the cathode flow field. It is advantageous to form the entire height of the first ridge 107b of the first flow field 103 (cathode flow field) of the cathode plate by the first conductive adhesive film 111, because this enables various formations in the cathode flow field that are conducive to drainage. The flow channel structure is difficult to form with traditional stamping.
本文公开了制造用于燃料电池单元的流场板的方法、制造用于燃料电池的双极板的方法、用于燃料电池单元的流场板和用于燃料电池的双极板。进一步的示例及其组合包括以下项：Disclosed herein are methods of making flow field plates for fuel cell units, methods of making bipolar plates for fuel cells, flow field plates for fuel cell units, and bipolar plates for fuel cells. Further examples and combinations include the following:
示例1包括一种制造用于燃料电池单元的流场板的方法，所述方法包括：在金属板的第一侧上形成用于流通反应流体的第一流场，所述第一流场的反应区包括界定出第一流道的第一脊部。形成所述第一流场包括以下步骤：在第一导电粘合膜中切出对应于所述第一脊部的第一图案；以及将切出的所述第一图案在所述第一侧上粘接到所述金属板，以使得所述第一脊部的从顶部测量的至少10％的高度由所述第一图案形成。Example 1 includes a method of manufacturing a flow field plate for a fuel cell unit, the method comprising: forming a first flow field for flowing a reaction fluid on a first side of the metal plate, the first flow field having The reaction zone includes a first ridge defining a first flow channel. Forming the first flow field includes the steps of: cutting out a first pattern corresponding to the first ridge in a first conductive adhesive film; and placing the cut out first pattern on the first side. is bonded to the metal plate such that at least 10% of the height of the first ridge measured from the top is formed by the first pattern.
示例2包括示例1的方法，其中：形成所述第一流场还包括通过对所述金属板冲压来形成所述第一脊部的第一部分的步骤；以及将切出的所述第一图案在所述第一侧上粘接到所述金属板的步骤包括将切出的所述第一图案粘接到所述第一部分上，以形成整个所述第一脊部。Example 2 includes the method of Example 1, wherein: forming the first flow field further includes forming a first portion of the first ridge by punching the metal plate; and cutting out the first pattern Bonding to the metal plate on the first side includes bonding the first pattern cut out to the first portion to form the entire first ridge.
示例3包括示例1的方法，其中：所述金属板的对应于所述反应区的第一区域是基本平坦的，所述第一图案被配置成使得所述第一脊部的从所述顶部测量的全部高度由所述第一图案形成；以及将切出的所述第一图案 在所述第一侧上粘接到所述金属板的步骤包括将切出的所述第一图案在所述第一侧上粘接到所述金属板的所述第一区域上，以形成整个所述第一脊部。Example 3 includes the method of Example 1, wherein: a first area of the metal plate corresponding to the reaction zone is substantially flat, and the first pattern is configured such that a portion of the first ridge extends from the top The entire measured height is formed by the first pattern; and the step of bonding the cut-out first pattern to the metal plate on the first side includes attaching the cut-out first pattern on the first side. The first side is bonded to the first area of the metal plate to form the entire first ridge.
示例4包括示例1的方法，其中，每个所述第一流道由两个侧壁以及在所述两个侧壁之间延伸的底壁界定，所述两个侧壁由相邻的两个所述第一脊部形成，并且所述底壁由所述金属板的在所述相邻的两个所述第一脊部之间的部分形成，所述第一图案不与所述金属板的所述部分交叠。Example 4 includes the method of Example 1, wherein each of the first flow channels is defined by two side walls and a bottom wall extending between the two side walls, the two side walls being formed by two adjacent The first ridge is formed, and the bottom wall is formed from a portion of the metal plate between the two adjacent first ridges, and the first pattern is not in contact with the metal plate. The parts overlap.
示例5包括示例1的方法，其中，所述第一导电粘合膜包括第一粘性材料以及分散在所述第一粘性材料中的第一导电颗粒。Example 5 includes the method of Example 1, wherein the first conductive adhesive film includes a first adhesive material and first conductive particles dispersed in the first adhesive material.
示例6包括示例5的方法，其中：所述第一粘性材料为PMMA、亚克力胶、聚吡咯、环氧树脂、硅树脂、聚酰胺、聚酰亚胺或氟橡胶；和/或所述第一导电颗粒为金、石墨、科琴黑、炭黑、石墨烯、单壁碳纳米管、多壁碳纳米管、氮化铬、氮化钛。Example 6 includes the method of Example 5, wherein: the first viscous material is PMMA, acrylic glue, polypyrrole, epoxy resin, silicone, polyamide, polyimide or fluororubber; and/or the first The conductive particles are gold, graphite, Ketjen black, carbon black, graphene, single-walled carbon nanotubes, multi-walled carbon nanotubes, chromium nitride, and titanium nitride.
示例7包括示例1的方法，其中，所述燃料电池单元还包括具有扩散层的膜电极组件，所述第一导电粘合膜被配置成将所述金属板粘接到所述扩散层，以在所述扩散层与所述金属板之间提供至少2N/cm的粘接力。Example 7 includes the method of Example 1, wherein the fuel cell unit further includes a membrane electrode assembly having a diffusion layer, and the first conductive adhesive film is configured to bond the metal plate to the diffusion layer, to An adhesion force of at least 2 N/cm is provided between the diffusion layer and the metal plate.
示例8包括示例1的方法，其中：在所述第一导电粘合膜中切出对应于所述第一脊部的所述第一图案的步骤包括将所述第一导电粘合膜设置在两层背膜之间以形成叠层结构、以及在所述叠层结构中切出对应于所述第一脊部的所述第一图案，将切出的所述第一图案在所述第一侧上粘接到所述金属板的步骤包括将切出的所述第一图案从所述背膜剥离并在所述第一侧上粘接到所述金属板。Example 8 includes the method of Example 1, wherein cutting the first pattern corresponding to the first ridges in the first conductive adhesive film includes disposing the first conductive adhesive film on between two layers of back films to form a laminated structure, and cut out the first pattern corresponding to the first ridge in the laminated structure, and place the cut out first pattern on the first The step of bonding to the metal plate on one side includes peeling the cut-out first pattern from the back film and bonding to the metal plate on the first side.
示例9包括示例1至8中任一项的方法，其中，所述金属板还包括被配置成接收反应流体的入口、以及被配置成排出反应产物的出口；所述第一流场还包括用于与所述入口连通的入口分配区、以及用于与所述出口连通的出口汇集区，所述反应区在所述入口分配区与所述出口汇集区之间延伸，所述入口分配区和所述出口汇集区中的至少一者包括界定出第二流道的第二脊部。形成所述第一流场还包括以下步骤：在第二粘合膜中切出对应于所述第二脊部的第二图案；以及将切出的所述第二图案在所述第一侧上粘接到所述金属板，以使得所述第二脊部的从顶部测量的至少一部分高度由所述第二图案形成。Example 9 includes the method of any one of examples 1 to 8, wherein the metal plate further includes an inlet configured to receive the reaction fluid and an outlet configured to discharge the reaction product; the first flow field further includes a In an inlet distribution area connected to the inlet and an outlet collection area connected to the outlet, the reaction zone extends between the inlet distribution area and the outlet collection area, the inlet distribution area and At least one of the outlet convergence areas includes a second ridge defining a second flow channel. Forming the first flow field further includes the steps of: cutting a second pattern corresponding to the second ridge in a second adhesive film; and placing the cut second pattern on the first side. is bonded to the metal plate such that at least a portion of the height of the second ridge measured from the top is formed by the second pattern.
示例10包括示例9的方法，其中：所述金属板的对应于所述入口分配 区和所述出口汇集区中的所述至少一者的第二区域是基本平坦的，所述第二图案被配置成使得所述第二脊部的从所述顶部测量的全部高度由所述第二图案形成；以及将切出的所述第二图案在所述第一侧上粘接到所述金属板的步骤包括将切出的所述第二图案在所述第一侧上粘接到所述金属板的所述第二区域上，以形成整个所述第二脊部。Example 10 includes the method of Example 9, wherein: a second area of the metal plate corresponding to the at least one of the inlet distribution area and the outlet collection area is substantially flat, and the second pattern is configured such that the entire height of the second ridge measured from the top is formed by the second pattern; and bonding the cut out second pattern to the metal plate on the first side The step includes bonding the cut out second pattern on the first side to the second area of the metal plate to form the entire second ridge.
示例11包括示例10的方法，其中，所述第二粘合膜为表面涂敷有亚克力胶的PEN、PET或PI膜。Example 11 includes the method of Example 10, wherein the second adhesive film is a PEN, PET or PI film whose surface is coated with acrylic glue.
示例12包括示例1至8中任一项的方法，其中，所述方法还包括在所述金属板的与所述第一侧相反的第二侧上形成用于流通冷却流体的第二流场，所述第二流场包括界定出第二流道的第三脊部。形成所述第二流场包括以下步骤：在第三导电粘合膜中切出对应于所述第三脊部的第三图案；以及将切出的所述第三图案在所述第二侧上粘接到所述金属板，以使得所述第三脊部的从顶部测量的至少10％的高度由所述第三图案形成。Example 12 includes the method of any one of examples 1 to 8, wherein the method further includes forming a second flow field for circulating cooling fluid on a second side of the metal plate opposite the first side. , the second flow field includes a third ridge defining a second flow channel. Forming the second flow field includes the steps of: cutting out a third pattern corresponding to the third ridge in a third conductive adhesive film; and placing the cut out third pattern on the second side. is bonded to the metal plate such that at least 10% of the height of the third ridge measured from the top is formed by the third pattern.
示例13包括示例12的方法，其中：所述金属板的对应于所述第二流场的第三区域是基本平坦的，所述第三图案被配置成使得所述第三脊部的从所述顶部测量的全部高度由所述第三图案形成；以及将切出的所述第三图案在所述第二侧上粘接到所述金属板的步骤包括将切出的所述第三图案在所述第二侧上粘接到所述金属板的所述三区域上，以形成整个所述第三脊部。Example 13 includes the method of Example 12, wherein: a third region of the metal plate corresponding to the second flow field is substantially flat, and the third pattern is configured such that a portion of the third ridge extends from the The entire height measured at the top is formed by the third pattern; and the step of bonding the cut-out third pattern to the metal plate on the second side includes attaching the cut-out third pattern Bonded to the three areas of the metal plate on the second side to form the entire third ridge.
示例14包括示例12的方法，其中，所述第三导电粘合膜包括第三粘性材料以及分散在所述第三粘性材料中的第二导电颗粒，所述第三粘性材料优选地为酚醛树脂或环氧树脂，所述第二导电颗粒优选地为膨胀石墨。Example 14 includes the method of Example 12, wherein the third conductive adhesive film includes a third viscous material, preferably a phenolic resin, and second conductive particles dispersed in the third viscous material. Or epoxy resin, the second conductive particles are preferably expanded graphite.
示例15包括一种制造用于燃料电池的双极板的方法，所述方法包括：利用示例1的方法制造阴极板；利用示例1的方法制造阳极板；以及将所述阴极板和所述阳极板以所述第一流场彼此背对的方式固定在一起，以形成双极板。Example 15 includes a method of manufacturing a bipolar plate for a fuel cell, the method comprising: manufacturing a cathode plate using the method of Example 1; manufacturing an anode plate using the method of Example 1; and combining the cathode plate and the anode. The plates are secured together with the first flow fields facing away from each other to form a bipolar plate.
示例16包括示例15的方法，其中：所述阴极板的所述第一流场的所述第一脊部的全部高度由所述第一导电粘合膜形成；以及所述阳极板的所述第一流场的所述第一脊部的从顶部测量的10％至50％的高度由所述第一导电粘合膜形成。Example 16 includes the method of Example 15, wherein: an entire height of the first ridge of the first flow field of the cathode plate is formed from the first conductive adhesive film; and the From 10% to 50% of the height of the first ridge of the first flow field measured from the top is formed by the first conductive adhesive film.
示例17包括一种用于燃料电池单元的流场板，所述流场板包括：金属板；形成于所述金属板的第一侧上并且用于流通反应流体的第一流场，所 述第一流场的反应区包括界定出第一流道的第一脊部；以及第一导电粘合膜，所述第一导电粘合膜呈对应于所述第一脊部的第一图案，并且在所述第一侧上粘接到所述金属板，以使得所述第一脊部的从顶部测量的至少10％的高度由所述第一图案形成。Example 17 includes a flow field plate for a fuel cell unit, the flow field plate including: a metal plate; a first flow field formed on a first side of the metal plate and for flowing a reaction fluid, the The reaction zone of the first flow field includes a first ridge defining a first flow channel; and a first conductive adhesive film in a first pattern corresponding to the first ridge, and Bonded to the metal plate on the first side such that at least 10% of the height of the first ridge measured from the top is formed by the first pattern.
示例18包括示例17的流场板，其中，所述第一脊部由第一部分和第二部分构成，所述第一部分通过对所述金属板进行冲压而形成，并且所述第二部分通过将所述第一导电粘合膜粘接到所述第一部分而形成。Example 18 includes the flow field plate of Example 17, wherein the first ridge is comprised of a first portion formed by stamping the metal plate, and a second portion formed by stamping the metal plate. The first conductive adhesive film is formed by bonding to the first part.
示例19包括示例17的流场板，其中，所述金属板的对应于所述反应区的第一区域是基本平坦的，所述第一导电粘合膜被粘接到所述第一区域上，并且被配置成使得所述第一脊部的从所述顶部测量的全部高度由所述第一图案形成。Example 19 includes the flow field plate of Example 17, wherein a first region of the metal plate corresponding to the reaction zone is substantially flat, and the first conductive adhesive film is bonded to the first region , and configured such that the entire height of the first ridge measured from the top is formed by the first pattern.
示例20包括示例17的流场板，其中，每个所述第一流道由两个侧壁以及在所述两个侧壁之间延伸的底壁界定，所述两个侧壁由相邻的两个所述第一脊部形成，并且所述底壁由所述金属板的在所述相邻的两个所述第一脊部之间的第二部分形成，所述第一图案不与所述金属板的所述第二部分交叠。Example 20 includes the flow field plate of Example 17, wherein each of the first flow channels is defined by two side walls and a bottom wall extending between the two side walls, the two side walls being bounded by adjacent Two of said first ridges are formed, and said bottom wall is formed by a second portion of said metal plate between said two adjacent said first ridges, and said first pattern is not identical to The second portions of the metal plates overlap.
示例21包括示例17的流场板，其中，所述第一导电粘合膜包括第一粘性材料以及分散在所述第一粘性材料中的第一导电颗粒。Example 21 includes the flow field plate of Example 17, wherein the first conductive adhesive film includes a first viscous material and first conductive particles dispersed in the first viscous material.
示例22包括示例21的流场板，其中，所述第一粘性材料为PMMA、亚克力胶、聚吡咯、环氧树脂、硅树脂、聚酰胺、聚酰亚胺或氟橡胶，和/或所述第一导电颗粒为金、石墨、科琴黑、炭黑、石墨烯、单壁碳纳米管、多壁碳纳米管、氮化铬、氮化钛。Example 22 includes the flow field plate of Example 21, wherein the first viscous material is PMMA, acrylic glue, polypyrrole, epoxy resin, silicone resin, polyamide, polyimide or fluororubber, and/or the The first conductive particles are gold, graphite, Ketjen black, carbon black, graphene, single-walled carbon nanotubes, multi-walled carbon nanotubes, chromium nitride, and titanium nitride.
示例23包括示例17的流场板，其中，所述燃料电池单元还包括具有扩散层的膜电极组件，所述第一导电粘合膜被配置成将所述金属板粘接到所述扩散层，以在所述扩散层与所述金属板之间提供至少2N/cm的粘接力。Example 23 includes the flow field plate of Example 17, wherein the fuel cell unit further includes a membrane electrode assembly having a diffusion layer, the first conductive adhesive film configured to bond the metal plate to the diffusion layer , to provide an adhesion force of at least 2N/cm between the diffusion layer and the metal plate.
示例24包括示例17的流场板，其中，所述流场板还包括被配置成接收反应流体的入口、以及被配置成排出反应产物的出口；所述第一流场还包括用于与所述入口连通的入口分配区、以及用于与所述出口连通的出口汇集区，所述反应区在所述入口分配区与所述出口汇集区之间延伸，所述入口分配区和所述出口汇集区中的至少一者包括界定出第二流道的第二脊部；所述流场板还包括由第二粘合膜，所述第二粘合膜呈对应于所述第二 脊部的第二图案，并且在所述第一侧上粘接到所述金属板，以使得所述第二脊部的从顶部测量的至少一部分高度由所述第二图案形成。Example 24 includes the flow field plate of Example 17, wherein the flow field plate further includes an inlet configured to receive the reaction fluid, and an outlet configured to discharge the reaction product; the first flow field further includes an outlet configured to communicate with the reaction fluid. The inlet distribution area is connected to the inlet, and the outlet collection area is used to communicate with the outlet. The reaction zone extends between the inlet distribution area and the outlet collection area. The inlet distribution area and the outlet At least one of the collection areas includes a second ridge defining a second flow channel; the flow field plate further includes a second adhesive film, the second adhesive film being in a shape corresponding to the second ridge a second pattern and bonded to the metal plate on the first side such that at least a portion of the height of the second ridge measured from the top is formed by the second pattern.
示例25包括示例24的流场板，其中，所述第二粘合膜为表面涂敷有亚克力胶的PEN、PET或PI膜。Example 25 includes the flow field plate of Example 24, wherein the second adhesive film is a PEN, PET or PI film whose surface is coated with acrylic glue.
示例26包括示例17的流场板，其中，所述金属板的对应于所述入口分配区和所述出口汇集区中的所述至少一者的第二区域是基本平坦的，所述第二粘合膜被粘接到所述第二区域上，并且被配置成使得所述第二脊部的从所述顶部测量的全部高度由所述第二图案形成。Example 26 includes the flow field plate of example 17, wherein a second area of the metal plate corresponding to the at least one of the inlet distribution area and the outlet collection area is substantially flat, the second An adhesive film is bonded to the second region and configured so that the entire height of the second ridge measured from the top is formed by the second pattern.
示例27包括示例17的流场板，其中，所述流场板还包括：形成于所述金属板的与所述第一侧相反的第二侧上并且用于流通冷却流体的第二流场，所述第二流场包括界定出第二流道的第三脊部；以及第三导电粘合膜，所述第三导电粘合膜呈对应于所述第三脊部的第三图案，并且在所述第二侧上粘接到所述金属板，以使得所述第三脊部的从顶部测量的至少10％的高度由所述第三图案形成。Example 27 includes the flow field plate of Example 17, wherein the flow field plate further includes: a second flow field formed on a second side of the metal plate opposite the first side and for flowing a cooling fluid. , the second flow field includes a third ridge defining a second flow channel; and a third conductive adhesive film, the third conductive adhesive film having a third pattern corresponding to the third ridge, and bonded to the metal plate on the second side such that at least 10% of the height of the third ridge measured from the top is formed by the third pattern.
示例28包括示例27的流场板，其中，所述第三导电粘合膜包括第三粘性材料以及分散在所述第三粘性材料中的第二导电颗粒，所述第三粘性材料优选地为酚醛树脂或环氧树脂，所述第二导电颗粒优选地为膨胀石墨。Example 28 includes the flow field plate of Example 27, wherein the third conductive adhesive film includes a third viscous material and second conductive particles dispersed in the third viscous material, the third viscous material is preferably Phenolic resin or epoxy resin, the second conductive particles are preferably expanded graphite.
示例29包括示例17的流场板，其中，所述金属板的对应于所述第二流场的第三区域是基本平坦的，所述第三图案粘接到所述第三区域上，并且被配置成使得所述第三脊部的从所述顶部测量的全部高度由所述第三图案形成。Example 29 includes the flow field plate of Example 17, wherein a third region of the metal plate corresponding to the second flow field is substantially flat, the third pattern is bonded to the third region, and is configured such that the entire height of the third ridge measured from the top is formed by the third pattern.
示例30包括一种用于燃料电池的双极板，所述双极板包括：阳极板，所述阳极板是根据示例11的流场板；阴极板，所述阴极板是根据示例11的流场板；其中，所述阳极板和所述阴极板以所述第一流场彼此背对的方式固定在一起。Example 30 includes a bipolar plate for a fuel cell, the bipolar plate comprising: an anode plate, the anode plate being a flow field plate according to Example 11; and a cathode plate, the cathode plate being a flow field plate according to Example 11. Field plate; wherein the anode plate and the cathode plate are fixed together in such a manner that the first flow field faces away from each other.
示例31包括示例30的双极板，其中，所述阴极板的所述第一流场的所述第一脊部的全部高度由所述第一导电粘合膜形成，所述阳极板的所述第一流场的所述第一脊部的从顶部测量的10％至50％的高度由所述第一导电粘合膜形成。Example 31 includes the bipolar plate of Example 30, wherein the entire height of the first ridge of the first flow field of the cathode plate is formed by the first conductive adhesive film, and all of the height of the first ridge of the anode plate is From 10% to 50% of the height of the first ridge of the first flow field measured from the top is formed by the first conductive adhesive film.
应理解，术语“第一”、“第二”、“第三”仅用于将一个部件或部分与另一个部件或部分分开来，但是这些部件和/或部分不应受到此类术语的限制。It is understood that the terms "first", "second" and "third" are only used to distinguish one element or section from another element or section, but these elements and/or sections should not be limited by such terms .
以上结合具体实施例对本申请进行了详细描述。显然，以上描述以及在附图中示出的实施例均应被理解为是示例性的，而不构成对本申请的限制。对于本领域技术人员而言，可以在不脱离本申请的精神的情况下对其进行各种变型或修改，这些变型或修改均不脱离本申请的范围。The present application has been described in detail above with reference to specific embodiments. Obviously, the above description and the embodiments shown in the drawings should be understood as illustrative and do not constitute limitations to the present application. For those skilled in the art, various variations or modifications can be made without departing from the spirit of the present application, and these variations or modifications do not depart from the scope of the present application.

Claims (19)

  1. 一种制造用于燃料电池单元的流场板的方法，包括：A method of manufacturing a flow field plate for a fuel cell unit, comprising:
    在金属板的第一侧上形成用于流通反应流体的第一流场，所述第一流场的反应区包括界定出第一流道的第一脊部，其中，形成所述第一流场包括以下步骤：A first flow field is formed on the first side of the metal plate for circulating the reaction fluid, the reaction zone of the first flow field includes a first ridge defining a first flow channel, wherein the first flow field is formed Includes the following steps:
    在第一导电粘合膜中切出对应于所述第一脊部的第一图案；以及cutting a first pattern corresponding to the first ridge in the first conductive adhesive film; and
    将切出的所述第一图案在所述第一侧上粘接到所述金属板，以使得所述第一脊部的从顶部测量的至少10％的高度由所述第一图案形成。The cut out first pattern is bonded to the metal plate on the first side such that at least 10% of the height of the first ridge measured from the top is formed by the first pattern.
  2. 根据权利要求1所述的方法，其特征在于：The method according to claim 1, characterized in that:
    形成所述第一流场还包括通过对所述金属板冲压来形成所述第一脊部的第一部分的步骤，将切出的所述第一图案在所述第一侧上粘接到所述金属板的步骤包括将切出的所述第一图案粘接到所述第一脊部的所述第一部分上，以形成整个所述第一脊部；或者Forming the first flow field further includes the step of forming a first portion of the first ridge by punching the metal plate, bonding the cut out first pattern to the first side on the first side. The metal plate step includes bonding the cut out first pattern to the first portion of the first ridge to form the entire first ridge; or
    所述金属板的对应于所述反应区的第一区域是基本平坦的，所述第一图案被配置成使得所述第一脊部的从所述顶部测量的全部高度由所述第一图案形成，将切出的所述第一图案在所述第一侧上粘接到所述金属板的步骤包括将切出的所述第一图案在所述第一侧上粘接到所述第一区域上，以形成整个所述第一脊部。A first area of the metal plate corresponding to the reaction zone is substantially flat, and the first pattern is configured such that the entire height of the first ridge measured from the top is determined by the first pattern. Forming, the step of bonding the cut-out first pattern to the metal plate on the first side includes bonding the cut-out first pattern to the first layer on the first side. on an area to form the entire first ridge.
  3. 根据权利要求1所述的方法，其特征在于：The method according to claim 1, characterized in that:
    所述第一导电粘合膜包括第一粘性材料以及分散在所述第一粘性材料中的第一导电颗粒，所述第一粘性材料优选地为PMMA、亚克力胶、聚吡咯、环氧树脂、硅树脂、聚酰胺、聚酰亚胺或氟橡胶，所述第一导电颗粒优选地为金、石墨、科琴黑、炭黑、石墨烯、单壁碳纳米管、多壁碳纳米管、氮化铬、氮化钛；和/或The first conductive adhesive film includes a first viscous material and first conductive particles dispersed in the first viscous material. The first viscous material is preferably PMMA, acrylic glue, polypyrrole, epoxy resin, Silicone, polyamide, polyimide or fluororubber, the first conductive particles are preferably gold, graphite, Ketjen black, carbon black, graphene, single-walled carbon nanotubes, multi-walled carbon nanotubes, nitrogen Chromium, titanium nitride; and/or
    每个所述第一流道由两个侧壁以及在所述两个侧壁之间延伸的底壁界定，所述两个侧壁由相邻的两个所述第一脊部形成，并且所述底壁由所述金属板的在所述相邻的两个所述第一脊部之间的部分形成，所述第一图案不与所述金属板的所述部分交叠。Each first flow channel is defined by two side walls formed by two adjacent first ridges and a bottom wall extending between the two side walls, and the two side walls are formed by two adjacent first ridges. The bottom wall is formed from a portion of the metal plate between the adjacent two first ridges, and the first pattern does not overlap with the portion of the metal plate.
  4. 根据权利要求1所述的方法，其特征在于：The method according to claim 1, characterized in that:
    所述燃料电池单元还包括具有扩散层的膜电极组件，所述第一导电粘合膜被配置成将所述金属板粘接到所述扩散层，以在所述扩散层与所述金属板之间提供至少2N/cm的粘接力；和/或The fuel cell unit further includes a membrane electrode assembly having a diffusion layer, the first conductive adhesive film being configured to bond the metal plate to the diffusion layer to connect the diffusion layer to the metal plate. Provide an adhesive force of at least 2N/cm; and/or
    在所述第一导电粘合膜中切出对应于所述第一脊部的所述第一图案的步骤包括将所述第一导电粘合膜设置在两层背膜之间以形成叠层结构、以及在所述叠层结构中切出对应于所述第一脊部的所述第一图案，将切出的所述第一图案在所述第一侧上粘接到所述金属板的步骤包括将切出的所述第一图案从所述背膜剥离并在所述第一侧上粘接到所述金属板。Cutting out the first pattern corresponding to the first ridges in the first conductive adhesive film includes disposing the first conductive adhesive film between two backing films to form a laminate structure, and cutting out the first pattern corresponding to the first ridge in the laminated structure, bonding the cut out first pattern to the metal plate on the first side The step includes peeling the cut-out first pattern from the back film and bonding it to the metal plate on the first side.
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，The method according to any one of claims 1 to 4, characterized in that,
    所述金属板还包括被配置成接收反应流体的入口、以及被配置成排出反应产物的出口；The metal plate also includes an inlet configured to receive the reaction fluid, and an outlet configured to discharge the reaction product;
    所述第一流场还包括用于与所述入口连通的入口分配区、以及用于与所述出口连通的出口汇集区，所述反应区在所述入口分配区与所述出口汇集区之间延伸，所述入口分配区和所述出口汇集区中的至少一者包括界定出第二流道的第二脊部，形成所述第一流场还包括以下步骤：The first flow field also includes an inlet distribution area for communicating with the inlet and an outlet collection area for communicating with the outlet. The reaction area is between the inlet distribution area and the outlet collection area. extending between, at least one of the inlet distribution area and the outlet collection area includes a second ridge defining a second flow channel, forming the first flow field further includes the following steps:
    在第二粘合膜中切出对应于所述第二脊部的第二图案，其中，所述第二粘合膜为优选地为表面涂敷有亚克力胶的PEN、PET或PI膜；以及Cutting a second pattern corresponding to the second ridge in a second adhesive film, wherein the second adhesive film is preferably a PEN, PET or PI film with acrylic glue coated on the surface; and
    将切出的所述第二图案在所述第一侧上粘接到所述金属板，以使得所述第二脊部的从顶部测量的至少一部分高度由所述第二图案形成。The cut out second pattern is bonded to the metal plate on the first side such that at least a portion of the height of the second ridge measured from the top is formed by the second pattern.
  6. 根据权利要求5所述的方法，其特征在于：The method according to claim 5, characterized in that:
    所述金属板的对应于所述入口分配区和所述出口汇集区中的所述至少一者的第二区域是基本平坦的，所述第二图案被配置成使得所述第二脊部的从所述顶部测量的全部高度由所述第二图案形成；以及A second area of the metal plate corresponding to the at least one of the inlet distribution area and the outlet collection area is substantially flat, and the second pattern is configured such that the second ridge The entire height measured from the top is formed by the second pattern; and
    将切出的所述第二图案在所述第一侧上粘接到所述金属板的步骤包括将切出的所述第二图案在所述第一侧上粘接到所述金属板的所述第二区域上，以形成整个所述第二脊部。The step of bonding the cut-out second pattern to the metal plate on the first side includes bonding the cut-out second pattern to the metal plate on the first side. on the second area to form the entire second ridge.
  7. 根据权利要求1至4中任一项所述的方法，其特征在于，所述方法还包括在所述金属板的与所述第一侧相反的第二侧上形成用于流通冷却流 体的第二流场，所述第二流场包括界定出第二流道的第三脊部，其中，形成所述第二流场包括以下步骤：The method according to any one of claims 1 to 4, further comprising forming a third channel for circulating cooling fluid on a second side of the metal plate opposite to the first side. A second flow field, the second flow field includes a third ridge defining a second flow channel, wherein forming the second flow field includes the following steps:
    在第三导电粘合膜中切出对应于所述第三脊部的第三图案，所述第三导电粘合膜包括第三粘性材料以及分散在所述第三粘性材料中的第二导电颗粒，其中，所述第三粘性材料优选地为酚醛树脂或环氧树脂，所述第二导电颗粒优选地为膨胀石墨；以及Cutting a third pattern corresponding to the third ridge in a third conductive adhesive film, the third conductive adhesive film including a third adhesive material and a second conductive layer dispersed in the third adhesive material Particles, wherein the third viscous material is preferably phenolic resin or epoxy resin, and the second conductive particles are preferably expanded graphite; and
    将切出的所述第三图案在所述第二侧上粘接到所述金属板，以使得所述第三脊部的从顶部测量的至少10％的高度由所述第三图案形成。The cut out third pattern is bonded to the metal plate on the second side such that at least 10% of the height of the third ridge measured from the top is formed by the third pattern.
  8. 根据权利要求7所述的方法，其特征在于：The method according to claim 7, characterized in that:
    所述金属板的对应于所述第二流场的第三区域是基本平坦的，所述第三图案被配置成使得所述第三脊部的从所述顶部测量的全部高度由所述第三图案形成；以及A third region of the metal plate corresponding to the second flow field is substantially flat, and the third pattern is configured such that the entire height of the third ridge measured from the top is determined by the third ridge. Three pattern formation; and
    将切出的所述第三图案在所述第二侧上粘接到所述金属板的步骤包括将切出的所述第三图案在所述第二侧上粘接到所述金属板的所述三区域上，以形成整个所述第三脊部。The step of bonding the cut-out third pattern to the metal plate on the second side includes bonding the cut-out third pattern to the metal plate on the second side. on the three areas to form the entire third ridge.
  9. 一种制造用于燃料电池的双极板的方法，包括：A method of manufacturing a bipolar plate for a fuel cell, comprising:
    利用根据权利要求1所述的方法制造阴极板；Using the method according to claim 1 to manufacture a cathode plate;
    利用根据权利要求1所述的方法制造阳极板；以及manufacturing an anode plate using the method according to claim 1; and
    将所述阴极板和所述阳极板以所述第一流场彼此背对的方式固定在一起，以形成双极板。The cathode plate and the anode plate are fixed together with the first flow field facing away from each other to form a bipolar plate.
  10. 根据权利要求9所述的方法，其特征在于：The method according to claim 9, characterized in that:
    所述阴极板的所述第一流场的所述第一脊部的全部高度由所述第一导电粘合膜形成；以及the entire height of the first ridge of the first flow field of the cathode plate is formed by the first conductive adhesive film; and
    所述阳极板的所述第一流场的所述第一脊部的从顶部测量的10％至50％的高度由所述第一导电粘合膜形成。From 10% to 50% of the height of the first ridge of the first flow field of the anode plate measured from the top is formed by the first conductive adhesive film.
  11. 一种用于燃料电池单元的流场板，包括：A flow field plate for a fuel cell unit, including:
    金属板；Metal plate;
    形成于所述金属板的第一侧上并且用于流通反应流体的第一流场，所 述第一流场的反应区包括界定出第一流道的第一脊部；以及A first flow field is formed on the first side of the metal plate and for flowing a reaction fluid, the reaction zone of the first flow field including a first ridge defining a first flow channel; and
    第一导电粘合膜，所述第一导电粘合膜呈对应于所述第一脊部的第一图案，并且在所述第一侧上粘接到所述金属板，以使得所述第一脊部的从顶部测量的至少10％的高度由所述第一图案形成。a first conductive adhesive film in a first pattern corresponding to the first ridges and bonded to the metal plate on the first side such that the first At least 10% of the height of a ridge measured from the top is formed by the first pattern.
  12. 根据权利要求11所述的流场板，其特征在于：The flow field plate according to claim 11, characterized in that:
    所述第一脊部由第一部分和第二部分构成，所述第一部分通过对所述金属板进行冲压而形成，并且所述第二部分通过将所述第一导电粘合膜粘接到所述第一部分而形成；或者The first ridge is composed of a first part formed by punching the metal plate, and a second part formed by bonding the first conductive adhesive film to the formed by the first part; or
    所述金属板的对应于所述反应区的第一区域是基本平坦的，所述第一导电粘合膜被粘接到所述第一区域上，并且被配置成使得所述第一脊部的从所述顶部测量的全部高度由所述第一图案形成。A first area of the metal plate corresponding to the reaction zone is substantially flat, the first conductive adhesive film is bonded to the first area, and is configured such that the first ridge The entire height measured from the top is formed by the first pattern.
  13. 根据权利要求11所述的流场板，其特征在于：The flow field plate according to claim 11, characterized in that:
    所述第一导电粘合膜包括第一粘性材料以及分散在所述第一粘性材料中的第一导电颗粒，所述第一粘性材料优选地为PMMA、亚克力胶、聚吡咯、环氧树脂、硅树脂、聚酰胺、聚酰亚胺或氟橡胶，所述第一导电颗粒优选地为金、石墨、科琴黑、炭黑、石墨烯、单壁碳纳米管、多壁碳纳米管、氮化铬、氮化钛；和/或The first conductive adhesive film includes a first viscous material and first conductive particles dispersed in the first viscous material. The first viscous material is preferably PMMA, acrylic glue, polypyrrole, epoxy resin, Silicone, polyamide, polyimide or fluororubber, the first conductive particles are preferably gold, graphite, Ketjen black, carbon black, graphene, single-walled carbon nanotubes, multi-walled carbon nanotubes, nitrogen Chromium, titanium nitride; and/or
    每个所述第一流道由两个侧壁以及在所述两个侧壁之间延伸的底壁界定，所述两个侧壁由相邻的两个所述第一脊部形成，并且所述底壁由所述金属板的在所述相邻的两个所述第一脊部之间的第二部分形成，所述第一图案不与所述金属板的所述第二部分交叠；和/或Each first flow channel is defined by two side walls formed by two adjacent first ridges and a bottom wall extending between the two side walls, and the two side walls are formed by two adjacent first ridges. The bottom wall is formed by a second portion of the metal plate between the adjacent two first ridges, the first pattern not overlapping the second portion of the metal plate ;and / or
    所述燃料电池单元还包括具有扩散层的膜电极组件，所述第一导电粘合膜被配置成将所述金属板粘接到所述扩散层，以在所述扩散层与所述金属板之间提供至少2N/cm的粘接力。The fuel cell unit further includes a membrane electrode assembly having a diffusion layer, the first conductive adhesive film being configured to bond the metal plate to the diffusion layer to connect the diffusion layer to the metal plate. Provide an adhesive force of at least 2N/cm.
  14. 根据权利要求11所述的流场板，其特征在于：The flow field plate according to claim 11, characterized in that:
    所述流场板还包括被配置成接收反应流体的入口、以及被配置成排出反应产物的出口；The flow field plate also includes an inlet configured to receive the reaction fluid, and an outlet configured to discharge the reaction product;
    所述第一流场还包括用于与所述入口连通的入口分配区、以及用于与所述出口连通的出口汇集区，所述反应区在所述入口分配区与所述出口汇 集区之间延伸，所述入口分配区和所述出口汇集区中的至少一者包括界定出第二流道的第二脊部；The first flow field also includes an inlet distribution area for communicating with the inlet and an outlet collection area for communicating with the outlet. The reaction area is between the inlet distribution area and the outlet collection area. Extending between, at least one of the inlet distribution area and the outlet collection area includes a second ridge defining a second flow channel;
    所述流场板还包括第二粘合膜，所述第二粘合膜呈对应于所述第二脊部的第二图案，并且在所述第一侧上粘接到所述金属板，以使得所述第二脊部的从顶部测量的至少一部分高度由所述第二图案形成；以及the flow field plate further includes a second adhesive film in a second pattern corresponding to the second ridges and bonded to the metal plate on the first side, such that at least a portion of the height of the second ridge measured from the top is formed by the second pattern; and
    所述第二粘合膜为优选地为表面涂敷有亚克力胶的PEN、PET或PI膜。The second adhesive film is preferably a PEN, PET or PI film whose surface is coated with acrylic glue.
  15. 根据权利要求14所述的流场板，其特征在于：The flow field plate according to claim 14, characterized in that:
    所述金属板的对应于所述入口分配区和所述出口汇集区中的所述至少一者的第二区域是基本平坦的，所述第二粘合膜被粘接到所述第二区域上，并且被配置成使得所述第二脊部的从所述顶部测量的全部高度由所述第二图案形成。A second area of the metal plate corresponding to at least one of the inlet distribution area and the outlet collection area is substantially flat, and the second adhesive film is bonded to the second area on, and configured such that the entire height of the second ridge measured from the top is formed by the second pattern.
  16. 根据权利要求11所述的流场板，其特征在于，所述流场板还包括：The flow field plate according to claim 11, characterized in that the flow field plate further includes:
    形成于所述金属板的与所述第一侧相反的第二侧上并且用于流通冷却流体的第二流场，所述第二流场包括界定出第二流道的第三脊部；以及a second flow field formed on a second side of the metal plate opposite the first side and for circulating cooling fluid, the second flow field including a third ridge defining a second flow channel; as well as
    第三导电粘合膜，所述第三导电粘合膜呈对应于所述第三脊部的第三图案，并且在所述第二侧上粘接到所述金属板，以使得所述第三脊部的从顶部测量的至少10％的高度由所述第三图案形成，其中，所述第三导电粘合膜包括第三粘性材料以及分散在所述第三粘性材料中的第二导电颗粒，所述第三粘性材料优选地为酚醛树脂或环氧树脂，所述第二导电颗粒优选地为膨胀石墨。A third conductive adhesive film having a third pattern corresponding to the third ridges and bonded to the metal plate on the second side such that the third conductive adhesive film At least 10% of the height of the three ridges measured from the top is formed by the third pattern, wherein the third conductive adhesive film includes a third adhesive material and a second conductive layer dispersed in the third adhesive material particles, the third viscous material is preferably phenolic resin or epoxy resin, and the second conductive particles are preferably expanded graphite.
  17. 根据权利要求16所述的流场板，其特征在于：The flow field plate according to claim 16, characterized in that:
    所述金属板的对应于所述第二流场的第三区域是基本平坦的，所述第三图案粘接到所述第三区域上，并且被配置成使得所述第三脊部的从所述顶部测量的全部高度由所述第三图案形成。A third area of the metal plate corresponding to the second flow field is substantially flat, the third pattern is bonded to the third area, and is configured such that a portion of the third ridge is The entire height measured at the top is formed by the third pattern.
  18. 一种用于燃料电池的双极板，包括：A bipolar plate for a fuel cell, including:
    阳极板，所述阳极板是一个根据权利要求11所述的流场板；Anode plate, said anode plate is a flow field plate according to claim 11;
    阴极板，所述阴极板是另一个根据权利要求11所述的流场板；A cathode plate, the cathode plate being another flow field plate according to claim 11;
    其中，所述阳极板和所述阴极板以所述第一流场彼此背对的方式固定 在一起。Wherein, the anode plate and the cathode plate are fixed together in such a manner that the first flow field faces away from each other.
  19. 根据权利要求18所述的双极板，其特征在于：The bipolar plate according to claim 18, characterized in that:
    所述阴极板的所述第一流场的所述第一脊部的全部高度由所述第一导电粘合膜形成；以及the entire height of the first ridge of the first flow field of the cathode plate is formed by the first conductive adhesive film; and
    所述阳极板的所述第一流场的所述第一脊部的从顶部测量的10％至50％的高度由所述第一导电粘合膜形成。From 10% to 50% of the height of the first ridge of the first flow field of the anode plate measured from the top is formed by the first conductive adhesive film.
PCT/CN2022/113295 2022-08-18 2022-08-18 Flow field plate and manufacturing method therefor, and bipolar plate and manufacturing method therefor WO2024036558A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000133282A (en) * 1998-10-21 2000-05-12 Ishikawajima Harima Heavy Ind Co Ltd Separator for solid polymer electrolyte fuel cell
US6884537B2 (en) * 2001-12-20 2005-04-26 Freudenberg-Nok General Partnership Structural seal for a fuel cell
CN1883071A (en) * 2003-11-20 2006-12-20 通用汽车公司 PEM fuel cell stack with coated flow distribution network
CN109360998A (en) * 2018-10-22 2019-02-19 吕伟 Super thin metal composite dual-electrode plates and preparation method thereof and fuel cell comprising it
CN110336053A (en) * 2019-07-16 2019-10-15 中南大学 A kind of preparation method of the fuel battery double plates containing runner
CN111384413A (en) * 2020-04-29 2020-07-07 上海捷氢科技有限公司 Fuel cell bipolar plate with metal-graphite composite structure and fuel cell
CN113675420A (en) * 2021-08-18 2021-11-19 哈尔滨工业大学（深圳） Gas diversion diffusion flow field plate, preparation method thereof and fuel cell

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000133282A (en) * 1998-10-21 2000-05-12 Ishikawajima Harima Heavy Ind Co Ltd Separator for solid polymer electrolyte fuel cell
US6884537B2 (en) * 2001-12-20 2005-04-26 Freudenberg-Nok General Partnership Structural seal for a fuel cell
CN1883071A (en) * 2003-11-20 2006-12-20 通用汽车公司 PEM fuel cell stack with coated flow distribution network
CN109360998A (en) * 2018-10-22 2019-02-19 吕伟 Super thin metal composite dual-electrode plates and preparation method thereof and fuel cell comprising it
CN110336053A (en) * 2019-07-16 2019-10-15 中南大学 A kind of preparation method of the fuel battery double plates containing runner
CN111384413A (en) * 2020-04-29 2020-07-07 上海捷氢科技有限公司 Fuel cell bipolar plate with metal-graphite composite structure and fuel cell
CN113675420A (en) * 2021-08-18 2021-11-19 哈尔滨工业大学（深圳） Gas diversion diffusion flow field plate, preparation method thereof and fuel cell

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