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CN100595956C - Manufacturing method of flexible graphite polar plate with grooves on two sides - Google Patents

Manufacturing method of flexible graphite polar plate with grooves on two sides Download PDF

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Publication number
CN100595956C
CN100595956C CN200710011001A CN200710011001A CN100595956C CN 100595956 C CN100595956 C CN 100595956C CN 200710011001 A CN200710011001 A CN 200710011001A CN 200710011001 A CN200710011001 A CN 200710011001A CN 100595956 C CN100595956 C CN 100595956C
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plate
density
sides
grooves
manufacturing
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CN101290993A (en
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付云峰
徐乃涛
明平文
侯中军
阳贻华
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Sunrise Power Co Ltd
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Sunrise Power Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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Abstract

The invention relates to a proton exchange membrane fuel cell, in particular to a method for manufacturing a flexible graphite polar plate with grooves on two sides, which can be operated according to the following steps that 1) expanded graphite is rolled or molded into a low-density plate; 2) dipping the low-density board into a thermosetting resin solution or a thermoplastic resin emulsion, and drying to obtain a dry board; 3) molding the drying plate into a compact flat plate; 4) selecting thickness proportion of the dense flat plate according to the depth of the groove of the manufactured polar plate, bonding 2-5 layers of the dense flat plates by using glue or a glue film, wherein the bonding part is the sealing structure part of the fuel cell bipolar plate, and flexible graphite thin paper is lined in other regions except the bonding part of the dense flat plate; 5) forming the bonded flat plate, and pressing grooves on two sides; 6) and (3) performing heat curing or sintering on the polar plate with the grooves on the two sides. The invention has the advantages that: the yield of the flexible graphite bipolar plate is improved, and the sealing performance is good.

Description

A kind of manufacture method of flexible graphite polar plate of two sides band groove
Technical field
The present invention relates to Proton Exchange Membrane Fuel Cells, the method for the pole plate of flexible graphite material for fuel cell two sides band groove is made in specifically a kind of lay-up method mold pressing.
Background technology
Proton Exchange Membrane Fuel Cells is to be fuel with hydrogen, methyl alcohol etc., is oxidant with air (oxygen), carries out electrochemical reaction, directly produces the device of electric energy.A single battery voltage is generally at 0.3-1.0V, and this voltage is very low, so in actual applications, is that the monocell series connection of tens～hundreds of is used together.With bipolar plates monocell is connected, supply with the fuel and the oxidant of monocell and separate fuel and oxidant, bipolar plates also has the cooling duct, cooling agent and fuel and oxidant also must be separated, therefore, require bipolar plates to have conductivity, gas and cooling agent (water) are had impermeability, and require to have corrosion stability for fuel, oxidant, dielectric film.
Use the expanded graphite profiled sheeting, can be used as the material that satisfies above-mentioned performance.Expanded graphite is rolled into the low-density flat board, again dull and stereotyped impregnating resin solution is improved its density and corrosion stability, drying is removed solvent in the resin, again flat board is carried out the further densification of mold pressing, the flat board of this densification is processed the pole plate of two sides band groove, pole plate heat-treated make the resin hot curing, again with the bipolar plates of the bonding formation band of pole plate anode cavities, cathode cavity and cooling chamber.(seeing shown in Figure 1), when forming the pole plate of two sides band ditch, because influence at ditch portion concentrated load, on pole plate, produce small crack, impermeability is descended,, keep impermeability gas, liquid for preventing this phenomenon, must increase the thickness of plate greatly, this has just produced the problem that increases the fuel cell volume.
Summary of the invention
In order to address the above problem, order of the present invention is to provide that a kind of thickness is less, the manufacture method of the flexible graphite polar plate of the two sides band groove of good airproof performance.
To achieve these goals, the technical solution used in the present invention is: the present invention adopts two or multi-disc to soak the expanded graphite plate of resin to carry out moulding after bonding, the density of soaking the expanded graphite plate of resin can be the same or different, and profiled sheeting makes resin solidification obtain the pole plate of flexible graphite material for fuel cell two sides band groove through Overheating Treatment.
A kind of manufacture method of flexible graphite polar plate of two sides band groove,
Can follow these steps to operate,
1) with expanded graphite through roll extrusion or to be molded into density be 0.15-0.5g/cm 3Low-density plank, its thickness often is 1.5-8mm;
2) low-density plank is flooded thermosetting resin solution or thermoplastic resin fat liquor, the gain in weight of resin is the 15-50% of low-density plank weight, and drying and volatilizing is removed the solvent in the dipping plate, gets drying plate;
3) drying plate being molded into density is 0.9-1.5g/cm 3Closely knit flat board, its thickness is 0.3-1.2mm often, the dull and stereotyped density after the compacting can be identical, also can be different;
4) with the gash depth of closely knit flat board according to the manufacturing pole plate, select identical or different thickness ratio, carry out the closely knit flat board of 2-5 layer bonding with glue or glued membrane, bonding position be fuel battery double plates hermetically-sealed construction position (its be positioned at closely knit flat board around, and between two-layer flat board pad flexible graphite thin paper in the middle of the hermetically-sealed construction), other zone (being the position, flow field) the pad flexible graphite thin paper beyond in the bonding position of closely knit flat board;
5) flat board after bonding is carried out processing and forming, two sides compacting groove; In compacting groove process, the adhesive sheet applied pressure is generally 100-600kg/cm 2
The closely knit flat board of individual layer of bonding rear plate both sides is compared,, the plate face of the big side of density is suppressed towards the more shallow side of groove if side grooves degree of depth difference is selected to suppress towards the darker side of plate trench than the plate face of low-density side;
If the side grooves degree of depth is identical, with the plate face of the big side of two plate unipolar plate density that is about to be assembled into same bipolar plates towards the plate face of cooling agent one side or the little side of two plate unipolar plate density towards cooling agent one side; Preferably the plate face of the big side of density is towards cooling agent one side;
Wherein, if selected plate face than low-density, thicker side suppress towards the darker side of plate trench, with density big, suppress towards the more shallow side of groove than the plate face of minimal thickness side; (prepared electrode thickness is relatively large)
6) pole plate with the two sides band groove carries out hot curing or sintering; Heat curing temperature 120-175 ℃, time 30-60 minute, sintering temperature 340-380 ℃, time 180-360 minute.
Can be added with needle-like or fibrous heat-resistant anticorrosion powder in the described expanded graphite raw material, as ceramic fibre (as: aluminium oxide), carbon fiber or mineral fibres (as: calcium silicates); Addition is the 5-30% of total weight.
Described thermosetting resin solution can be the organic solution of phenolic resins, epoxy resin or organic siliconresin etc., and its solvent can be ethanol, ethyl acetate or acetone, and its weight concentration is 5-15%; Baking temperature is a normal temperature-100 ℃; Described thermoplastic resin fat liquor can be fluoro-resin emulsion (as PTFE, PVDF etc.), and its weight concentration is 5-15%, and baking temperature is 100-120 ℃.Dipping can carry out under vacuum condition;
Described bonding position may extend into the dispensing section of bipolar plate flow field; Soaking on the expanded graphite plate non-tight structure position pad of resin the flexible graphite thin paper to support or to adjust bipolar plate flow field position protrusion height; Be coated with hydrophobic material layer (as: playing the polytetrafluoroethylene floor of waterproof action) on the described flexible graphite thin paper, to support or to adjust bipolar plate flow field position protrusion height.
The invention provides the manufacture method of pole plate with fully impermeable and two sides band groove that the fuel cell of thickness below 3.3mm used.
The present invention has following advantage:
1 adopts the method for multilayer stack moulding, the layer flexible graphite cake in forming process middle part separate stratum fracfturing but the possibility of integral hydraulic fracturing reduce, solved the defective of the relatively poor easy pressure break of the plasticity of flexible graphite material own, improved the rate of finished products of bipolar plates.
The stack of 2 layer flexible graphite cakes, because of flexible graphite plate plate face packing is much higher than inherent density, the layer flexible graphite cake has also increased closely knit plate face number, and sealing further improves.
The method of 3 layer flexible graphite cakes stacks helps adjusting the realization of each function of bipolar plates itself, requires the protruding heart as bipolar plates on the size, bipolar plates cooling chamber (water cavity), the processing of the air cavity runner difference depths and the realization of bipolar plates interior waterproof layer etc.
Description of drawings
Fig. 1 is dull and stereotyped bonding schematic diagram, is respectively dull and stereotyped and bonding film and bonding schematic diagram.The 1st, the airflow field chamber, flat board, density is big, and thickness is thicker, and the 2nd, adhesives or glued membrane, the 3rd, the flexible graphite thin paper, the 4th, cooling chamber, flat board, density is little, thinner thickness.
Fig. 2 is a two sides band groove cathode plate schematic diagram; A, B, C are respectively airflow field chamber 1, cooling chamber 4 and pole plate cutaway view.Wherein, 1 ' is the air ports house steward, and 2 ' is the water entrance house steward, 3 ' is that hydrogen is imported and exported house steward, and 4 ' is that air enters the flow field channel hole, and 5 ' is cathode-anode plate cemented in place hole, 6 ' is seal groove, 7 ' is bipolar plate flow field, and this part is a cathode cavity, and 8 ' is coolant flow field, this part is a cooling chamber, the coolant flow field dispensing section is an arc, and the airflow field dispensing section is the traverse furrow type, and there is intersection in the flow field on two sides at dispensing section.Positive plate and minus plate similar.
Embodiment
Expanded graphite used in the present invention can be made like this: but its reference literature US Patent5,885,728; 5,902,762; 6,074,585 operate:
Graphite has layer structure, is that the hexagonal looped network shape plane that carbon atom is lined up overlaps, and the adhesion in the layer plane is very strong, forms close network plane, but with the rectangular direction adhesion of layer plane a little less than, the bigger space of relative existence between layer and the layer.Therefore under suitable condition, the chemical substance of multiple classes such as acid, alkali metal, chloride enters graphite layers easily, generates compound between graphite layers (graphite internal compounds).This compound between graphite layers is heated to suitable temperature, and for example more than 350 or 800 ℃, compound between graphite layers will be along c direction of principal axis expansion 10-400 times of graphite crystallization.
The used expanded graphite of the present invention is that natural flake graphite uses the concentrated sulfuric acid as intercalator, red fuming nitric acid (RFNA), hydrogen peroxide, potassium permanganate, potassium chlorate etc. generate graphite residual compounds (expansible graphite) as the oxidant reaction after washing, expansible graphite expand into the expanded graphite powder through the expansion furnace more than 800 ℃ again, allowance for expansion reaches 80---and 400ml/g, the expanded graphite powder is a low-density plank through calendering formation.Can add a certain amount of fibrous or needle-like mineral powder or staple fiber in the expansible graphite, any change is not taking place in fibrous or needle-like mineral powder or staple fiber more than 800 ℃, in sour environment and under the oxidizability condition, do not decompose insoluble separating, used fibrous or needle-like mineral powder or staple fiber can be selected natural needle shape wollastonite powder, carborundum, silicon nitride etc.It is to improve the degree of anisotropy of pole plate intensity and pole plate heat, conductivity that the used expanded graphite of the present invention adds needle-like or fibrous powder purpose.Needle-like or fibrous material addition are at 5%-30%, and granularity is at the 50-150 order.
Embodiment 1
Allowance for expansion is that the 50 order expansible graphites of 200ml/g fully mix with the needle shape wollastonite powder of 10% weight ratio, the needle shape wollastonite powder granularity is 100 orders, through expanding in about 800 ℃ the expansion furnace, the expanded graphite powder is by rolling, makes thick 4.5mm, density is 0.2g/cm 3, wide 450mm, long 500mm expanded graphite plate and thick 3.0mm, density be 0.2g/cm 3, wide 450mm, long 500mm expanded graphite plate, this graphite cake is cut into 450 * 120mm plate, a collection of such graphite cake is placed in the impregnation tank, at first vacuumize, vacuum degree reaches-0.1MPa, suck resin solution again, flood in the ethanolic solution of phenolic resins and epoxy resin mixing, dip time is about 10 minutes.The proportioning of resin solution is a phenolic resins: epoxy resin: ethanol=10: 5: 85 (weight ratio).Dipping is after the normal temperature volatilization is dried through 90 ℃ of left and right sides temperature again, and about 2 hours of time, the resin gain in weight is at 15-50%.The plate of oven dry is placed on progressively pressurization repeatedly on the platen-press, and 4.5mm plate final pressure reaches 450kg/cm 2, 3.0mm plate final pressure reaches 250kg/cm 2, obtaining two kinds of density board, two plates are bonding with glued membrane, and middle pad is gone up the flexible graphite thin paper, and thickness is slightly thinner than glued membrane.Bonding graphite cake is placed on all fluted up and down metal die, applies about 500kg/cm 2Pressure forming, just obtained the pole plate that has required hermetically-sealed construction of bipolar plates and flow field structure of shape shown in Figure 2, general thickness is 1.7mm, the flow field one side degree of depth is 0.3mm, and wide is 0.7mm, and the opposite side degree of depth is 0.4mm, wide is the fuel cell plate of 0.8mm, the moulding pole plate is cured under certain temperature rise curve, as 5 ℃ of intensifications in per 15 minutes, is raised to 170 ℃ of insulations of curing temperature 1 hour from room temperature.
Embodiment 2, and the step processing original plate thickness same with example 1 is the expanded graphite plate of 4.5mm and 2.0mm, and making general thickness is 1.5mm, the flow field one side degree of depth is 0.5mm, wide is 1.0mm, and the opposite side degree of depth is 0.2mm, and wide is the cathode for fuel cell pole plate of 0.8mm.
Comparative example: step processing original plate thickness similarly to Example 1 is the expanded graphite plate of 7.5mm, and making general thickness is 1.7mm and the same cathode-anode plate of 1.5mm.
Adopt pole plate that is obtained in embodiment 1,2 and the comparative example and the bipolar plates of making thus, the 0.1MPa nitrogen Air permenbility such as the following table that adopt soap bubble method to record:
Table 1 unit: ml/cm 2S
Figure C20071001100100071
Table 1 clearly shows, two kinds of method processing of same material pole plate, and embodiment 1 and embodiment 2 Air permenbilities are little, and the bipolar plates that processes satisfies the needs of fuel cell, and 3 pairs of gases of example see through.
Used expanded graphite plate impregnating resin is in order to improve the plate forming performance, increase the sheet material impermeability and to increase pole plate intensity in the embodiment of the invention, and the density of expanded graphite plate is 0.15-0.5g/cm before the dipping 3, the resin gain in weight is at 15%-50%.Graphite cake behind the dipping need carry out sufficient drying, residual solvent not, with prevent to destroy the impermeability of pole plate and when the heat of solidification is handled solvent evaporates make pole plate produce bubble.
The two-layer expanded graphite plate of pole plates used employing is bonding in the embodiment of the invention, is to utilize the characteristics of expanded graphite plate when compacting surface surface density far above internal density, adopts two-layer bondedly then to many two high density surface than individual layer, further strengthens the pole plate impermeability.
In the embodiment of the invention the two-layer different densities plate of pole plates used employing bonding be according to the design of the characteristics of pole plate two sides groove.The characteristics of expanded graphite meterial are compressible, but poor ductility, and plate forming mechanism at first is the expanded graphite compression, obtains distortion, secondly are by extending, and make material migration and being out of shape, and this migration causes fracture easily.Low-density plank is the expanded graphite with porous, and the compression forming performance is good, and low-density plank is towards the zanjon side, and the distortion that the zanjon side requires is big, adopts low-density, utilizes its good compression, makes distortion not rupture; The high-density plate impermeability is good, and high-density plate is towards the moulding of shallow ridges side, because the distortion that the shallow ridges side requires is little, can utilize the compression of material to obtain, and sheet material is difficult for pressure break, can guarantee the partition of pole plate to gas, liquid.Low, high-density plate all is to adopt platen-press progressively to pressurize repeatedly to suppress after 90 ℃ of dryings the impregnating resin expanded graphite plate to form, and low-density plank density is controlled at 0.9-1.1g/cm 3, the low-density plank original thickness can be selected the 1.5-2.5mm plate; High-density plate is controlled at 1.2-1.5g/cm 3The original thick 4.0-6.0mm that selects of high-density plate.Sheet material face compacting is selected towards being that impermeability in order to keep pole plate requires the requirement consistent with the pole plate morphotropism; Should carry out sufficient exhaust in the time of the sheet material compacting, to prevent producing bubble in the graphite cake because of remaining air makes, the method for exhaust is the compacting repeatedly of repeatedly progressively pressurizeing.
Used adhesives is a kind of epoxies high strength glued membrane in the embodiment of the invention.Glued membrane covers the hermetically-sealed construction position of bipolar plates, also can extend to the bipolar plate flow field dispensing section.Hermetically-sealed construction position at pole plate is stained with adhesive material, the sealing position of one side reinforcement plate, and on the other hand, the impermeability of adhesive material has remedied the defective that pole plate dispensing section crossover sites processability is poor, be easy to the crack.
Pole plates used extrusion forming is to carry out in the metal pattern of groove structure is arranged in the embodiment of the invention.Promptly in mould, bonding plate is applied 100-600kg/cm 2Pressure, make the fuel battery pole board of double-sided belt groove, as the minus plate in carrying coolant (water) flow field or the positive plate in carrying coolant (water) flow field.

Claims (10)

1一种两面带沟槽的柔性石墨极板的制造方法，其特征在于：1. A method for manufacturing a flexible graphite pole plate with grooves on both sides, characterized in that: 可按下列步骤进行操作，Follow the steps below, 1)将膨胀石墨经滚压或模压成密度为0.15-0.5g/cm3的低密度板，其厚度为1.5-8mm；1) The expanded graphite is rolled or molded into a low-density board with a density of 0.15-0.5g/cm 3 and a thickness of 1.5-8mm; 2)将低密度板浸渍热固性树脂溶液或热塑性树脂乳液，树脂的增重量为低密度板重量的15-50％，干燥挥发除去浸渍板中的溶剂，得干燥板；2) impregnating the low-density board with thermosetting resin solution or thermoplastic resin emulsion, the weight gain of the resin is 15-50% of the weight of the low-density board, drying and volatilizing to remove the solvent in the impregnated board to obtain a dry board; 3)将干燥板模压成密度为0.9-1.5g/cm3的密实平板，其厚度为0.3-1.2mm；3) Molding the drying plate into a dense flat plate with a density of 0.9-1.5g/cm 3 and a thickness of 0.3-1.2mm; 4)将密实平板按照所制造极板的沟槽深度，选择相同或不同厚度配比，用胶或胶膜将2-5层密实平板进行粘接，粘接部位为燃料电池双极板密封结构部位，于密实平板粘接部位以外的其它区域垫衬柔性石墨薄纸；4) According to the groove depth of the plate to be manufactured, choose the same or different thickness ratios of the dense flat plate, and use glue or film to bond 2-5 layers of dense flat plates. The bonding part is the sealing structure of the bipolar plate of the fuel cell For the part, the flexible graphite thin paper is lined in other areas other than the dense flat bonding part; 5)将粘接后的平板进行成型加工，两面压制沟槽；5) Forming the bonded flat plate, and pressing the grooves on both sides; 6)将两面带沟槽的极板进行热固化或烧结。6) Thermally curing or sintering the pole plate with grooves on both sides. 2.按照权利要求1所述的制造方法，其特征在于：所述膨胀石墨原料中添加有针状或纤维状耐热抗腐蚀粉末，添加量为总重量的5-30％。2. The manufacturing method according to claim 1, characterized in that: acicular or fibrous heat-resistant and anti-corrosion powder is added to the expanded graphite raw material, and the added amount is 5-30% of the total weight. 3.按照权利要求2所述的制造方法，其特征在于：所述针状或纤维状耐热抗腐蚀粉末为陶瓷纤维、碳纤维或矿物纤维。3. The manufacturing method according to claim 2, characterized in that: the acicular or fibrous heat-resistant and anti-corrosion powder is ceramic fiber, carbon fiber or mineral fiber. 4.按照权利要求1所述的制造方法，其特征在于：4. according to the described manufacturing method of claim 1, it is characterized in that: 所述热固性树脂溶液为酚醛树脂、环氧树脂或有机硅树脂的有机溶液，其溶剂为乙醇、乙酸乙脂或丙酮，其重量浓度为5-15％；干燥温度为常温-100℃；The thermosetting resin solution is an organic solution of phenolic resin, epoxy resin or silicone resin, its solvent is ethanol, ethyl acetate or acetone, and its weight concentration is 5-15%; the drying temperature is normal temperature-100°C; 所述热塑性树脂乳液为氟树脂乳液，其重量浓度为5-15％，干燥温度为100-120℃；The thermoplastic resin emulsion is a fluororesin emulsion with a weight concentration of 5-15% and a drying temperature of 100-120°C; 所述浸渍在真空条件下进行。The impregnation is carried out under vacuum conditions. 5.按照权利要求1所述的制造方法，其特征在于：所述粘接部位延伸到双极板流场的分配段；在浸过树脂的膨胀石墨板非密封结构部位垫上柔性石墨薄纸以支撑或调整双极板流场部位凸出高度。5. according to the described manufacturing method of claim 1, it is characterized in that: described bonding position extends to the dispensing section of bipolar plate flow field; Soft graphite thin paper is cushioned on the non-sealed structural position of expanded graphite plate soaked in resin to Support or adjust the protruding height of the flow field of the bipolar plate. 6.按照权利要求1或5所述的制造方法，其特征在于：所述柔性石墨薄纸上涂敷有憎水材料层，以支撑或调整双极板流场部位凸出高度。6. The manufacturing method according to claim 1 or 5, characterized in that: the flexible graphite thin paper is coated with a hydrophobic material layer to support or adjust the height of the protrusion of the flow field of the bipolar plate. 7.按照权利要求1所述的制造方法，其特征在于：7. according to the described manufacturing method of claim 1, it is characterized in that: 将粘接后平板两侧的单层密实平板进行对比，如果两侧沟槽深度不同，选择较低密度侧的板面朝向极板沟槽较深的一侧进行压制，将密度大侧的板面朝向沟槽较浅的一侧进行压制；Compare the single-layer dense plates on both sides of the plate after bonding. If the depths of the grooves on both sides are different, select the plate surface on the lower density side to press toward the side with deeper grooves on the electrode plate, and press the plate surface on the higher density side. Press facing towards the shallower side of the groove; 如果两侧沟槽深度相同，将即将组装成同一双极板的二板单极板密度大侧的板面朝向冷却剂一侧、或二板单极板密度小侧的板面朝向冷却剂一侧。If the depth of the grooves on both sides is the same, the plate surface of the high-density side of the two-plate unipolar plate to be assembled into the same bipolar plate faces the coolant side, or the plate surface of the small-density side of the two-plate unipolar plate faces the coolant one side. 8.按照权利要求7所述的制造方法，其特征在于：如果两侧沟槽深度相同，密度大侧的板面朝向冷却剂一侧。8 . The manufacturing method according to claim 7 , wherein if the depths of the grooves on both sides are the same, the plate surface on the side with higher density faces the coolant side. 9 . 9.按照权利要求1所述的制造方法，其特征在于：所述在压制沟槽过程中对粘接板施加的压力为100-600kg/cm2。9. The manufacturing method according to claim 1, characterized in that: the pressure applied to the bonding plate during the process of pressing the groove is 100-600kg/cm 2 . 10.按照权利要求1所述的制造方法，其特征在于：所述热固化温度120-175℃，时间30-60分钟；所述烧结温度340-380℃，时间180-360分钟。10. The manufacturing method according to claim 1, characterized in that: the thermal curing temperature is 120-175°C, and the time is 30-60 minutes; the sintering temperature is 340-380°C, and the time is 180-360 minutes.
CN200710011001A 2007-04-18 2007-04-18 Manufacturing method of flexible graphite polar plate with grooves on two sides Expired - Fee Related CN100595956C (en)

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CN105134720A (en) * 2015-08-25 2015-12-09 江苏神州碳制品有限公司 Graphite plate bonding technology
CN105680074B (en) * 2016-03-22 2018-05-01 江苏神州碳制品有限公司 A kind of manufacture craft of impregnated graphite bipolar plates
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