CN102969513B - Large-area metal bipolar plate for automobile fuel cell - Google Patents
Large-area metal bipolar plate for automobile fuel cell Download PDFInfo
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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
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Abstract
The invention relates to a large-area metal bipolar plate for an automobile fuel cell. The bipolar plate is formed by connecting two pieces of single-pole plates which are completely the same as each other; the two single-pole plates are respectively provided with a fuel inlet/outlet, an oxidant inlet/outlet, a cooling liquid inlet/outlet and a flow field; the flow field arranged on the single-pole plate on one side is connected with the fuel inlet/outlet so as to be taken as a fuel flow field, and the flow field arranged on the single-pole plate on the other side is connected with the oxidant inlet/outlet so as to be taken as an oxidant flow field; a cooling liquid flow field connected with the cooling liquid inlet/outlet is formed by an interlayer between the two single-pole plates which are clamped together; and therefore, a three-inlet and three-outlet structure can be formed, and the function of two plates with three fields can be realized. Compared with the prior art, the large-area metal bipolar plate can be prepared only by a mould, so that the mould development expenses and the forming technology complexity are reduced; due to the structure of the two single-pole plates, the area of flow field region is large, reaction efficiency is high and the demands of high power and high energy rate density of the automobile fuel cell are met; and the large-area metal bipolar plate is suitable for large-scale manufacturing methods such as stamping forming, soft film forming and hydro-bulging, thus being low in manufacturing cost.
Description
Technical field
The present invention relates to a kind of manufacture method of field of fuel cell technology, specifically a kind of large-area metal bipolar plates configurations of Experimental research on proton exchange membrane fuel cells for vehicles and manufacture method thereof.
Background technology
Proton Exchange Membrane Fuel Cells (PEMFC) is a kind of " chemical energy generating " device chemical energy in raw material being directly transformed into electric energy, and its energy conversion efficiency does not limit by Carnot cycle, and the generating efficiency of battery pack can reach more than 50%.Meanwhile, PEMFC has environmental friendliness, and starting characteristic is excellent, and energy conversion efficiency is high, operates steadily, the feature such as noiseless, is expected to be applied at numerous areas, especially uses richly endowed by nature especially in automobile dynamic system.The practical automobile that can solve of PEMFC electric automobile increases considerably the environmental pollution and energy shortage problem that bring, for cleaning vehicle industry will provide new opportunity future.Therefore the research boom of a fuel cell car has just been started the nineties from last century.As far back as 1992, Canadian Ba Lade company have developed the pemfc stack of 88KW and is assembled with the first in the world Fuel Cell Bus under the subsidy of government.2009, the main automobile of Germany and energy company and government's combined launch " H
2mobility Initiative " plan, 1000 hydrogenation stations will be built up in 2015, and come into operation 500,000 fuel cell cars at the year two thousand twenty.Just there are 23 fuel cell car demonstrating runnings 7.6 ten thousand kilometers in China in 2008 Olympic Games, and in the 2010 World Fair, this is numerically raised to 196 and 910,000 kilometers.According to the planning of Shang Qi group, by 2015, fuel cell car will reach the production scale of thousand levels.The low cost manufacture of large-scale promotion application to PEMFC of fuel cell car proposes unprecedented challenge.
Bipolar plates is one of critical component of PEMFC.According to Direct Technologies company investigation statistics, bipolar plates accounts for 80% of pile volume, 70% of quality and cost 29%.Its major function is support membrane electrode assemblie, distributes reacting gas, collected current, heat conduction and discharge product water etc.At present, PEMFC bipolar plate material mainly contains three classes: graphite material, composite material and metal material.Graphite bi-polar plate conduction is good, decay resistance is strong, and the fuel cell car of current Demonstration Application mostly adopts this kind of bipolar plates; But material fragility is very big, bad mechanical property, working (machining) efficiency is low simultaneously, is difficult to realize commercialization and produces in enormous quantities.Composite material double pole plate is primary raw material with carbon dust and resin, is prepared from through modes such as mold pressings, and it is with low cost, but composite dual-electrode plates also exists the problem of conductivity and gas infiltration.Sheet metal has high intensity and conduction, heat conductivility, and raw material are cheap and be applicable to mass production method, is the first-selection of generally acknowledged fuel cell industrialization.
Through finding the retrieval of prior art document, more current research institutions and company propose different technical schemes for metal double polar plates.As China Patent Publication No. CN 1933222A has invented a kind of neutral network fractal runner double-pole plate, its flow field transition region runner adopts multi-channel nerve Network Fractal structure, make each flow channel length and the flow resistance of gas in each runner substantially equal.But this structure can only meet a kind of flow field demand, be difficult to take into account fuel, oxidant and cooling fluid flow field simultaneously.For another example the stamping forming metal double polar plates of one of China Patent Publication No. CN 101937998A design, comprises the first metallic plate and the second metallic plate.First metallic plate front arranges sealing platform area, and two plates arrange interrupted corner guiding gutter between flow field runner and each gas inlet and outlet, and strip groove is established in two plate cooling liquid outlet neighboring areas.This structure needs the unipolar plate of punching press two kinds of different configurations, adds die sinking cost and process complexity.And for example China Patent Publication No. CN 101937997A proposes a kind of on-plane surface curved metal bipolar plates with certain curvature, and the negative electrode unipolar plate be made up of sheet metal is relative with anode unipolar plate to be bonded; The cathode and anode chamber of two plates, coolant chamber and flow field area groove and boss convex-concave profile mutually corresponding, form fuel gas channel, oxidant channel and coolant guiding channel respectively.This structure needs to process how secondary mould equally, and the on-plane surface Mould Machining cost simultaneously with curvature is high, and machining accuracy is difficult to ensure; Simultaneously curved metal pole plate assembling difficulty, the gas diffusion layer materials such as carbon paper with curved metal pole plate assembling process in easily there is fracture failure.Finally as the bipolar plates based on thin plate punching of China Patent Publication No. CN 101101993A proposition, comprise two pieces of flow field veneers respectively as anode and negative electrode, one piece of intermediate supports thin plate is placed in flow field veneer directly, forms fuel, oxidant and cooling fluid and imports and exports.This structure needs the sheet metal ability content with funtion demand of three pieces of different configurations, and meanwhile, this bipolar plates flow resistance is comparatively large, is difficult to apply on the large-area metal pole plate of vehicle fuel battery.
Summary of the invention
Object of the present invention be exactly provide that a kind of cost is low to overcome defect that above-mentioned prior art exists, the large-area metal bipolar plates of compact conformation, flow field regions area is large, reaction efficiency is high vehicle fuel battery.
Object of the present invention can be achieved through the following technical solutions: a kind of large-area metal bipolar plates of vehicle fuel battery, it is characterized in that, this bipolar plates is formed by connecting by two pieces of identical unipolar plate, two pieces of unipolar plate are equipped with fuel to import and export, oxidant is imported and exported, cooling fluid is imported and exported and flow field, flow field wherein in the unipolar plate of side connects fuel and imports and exports as fuel flow field, flow field in opposite side unipolar plate connects oxidant and imports and exports as oxidant flow field, after two pieces of unipolar plate clampings, interlayer forms the cooling fluid flow field connecting cooling fluid and import and export, be three to enter three and go out structure, realize two plates, three functions.
Fuel inlet in described unipolar plate and oxidant inlet lay respectively at unipolar plate two ends, and Rotational Symmetry, flow field in unipolar plate is made up of the drainage trough at two ends and the direct current groove of centre, described drainage trough one end connects fuel and imports and exports or oxidant import and export, the other end connects direct current groove, corresponding three direct current grooves of each drainage trough, the fuel gas introduce drainage trough or oxidant gas are divided into three strands of gases.
The number of described drainage trough is 9 ~ 25.
Described cooling fluid is imported and exported and is divided into large mouth and osculum, and the large mouth of bipolar plates the same side is connected with osculum; Large mouth connects 8 ~ 12 cooling fluid distributing troughs, and osculum connects 6 ~ 10 cooling fluid distributing troughs, and the cooling fluid distributing trough that large mouth and osculum are connected separately misplaces and arranges, forms cooling fluid flow field.
Described bipolar plates overall dimensions is 100 × 400mm, and flow field effective area is greater than 90%; Bipolar plates main body is straight parallel flow field, and runner number is 27 ~ 75; Its cross section of fluid channel is rectangle, and groove depth is 0.4 ~ 0.6mm, and groove width is 0.8 ~ 1.5mm, and ridge is wide is 0.5 ~ 1.2mm, and radius of corner is 0.05 ~ 0.2mm; Seal groove cross section is rectangle, and sealing groove width is 1.5 ~ 3.0mm, and depth of sealing groove is 0.4 ~ 0.6mm.
Described unipolar plate adopts drawing by the metallic sheet stock that 0.1 ~ 0.2mm is thick, mantle is shaped or hydraulic expanding-forming is shaping; Two pieces of unipolar plate are connected by gluing, resistance spot welding or laser welding.
Described bipolar plates periphery is provided with dowel hole, locates half pin-and-hole or location end face.
Described bipolar plates side is also provided with patrols and examines mouth, and described mouth of patrolling and examining is rectangle or semicircle.
Bipolar plates of the present invention is made up of two pieces of identical unipolar plate, only needs a secondary mould, reduces mould development expense and forming technology complexity; Bipolar plate structure is compact, and flow field regions area is large, and reaction efficiency is high, is applicable to high-power, the high-duty density requirement of vehicle fuel battery; This pole plate is suitable for the manufacture method in enormous quantities such as drawing, mantle shaping, hydraulic expanding-forming, cheap for manufacturing cost.
Compared with prior art, the vehicle fuel battery large-area metal bipolar plates ingehious design " three enter three goes out " that the present invention proposes and " one point three " structure, two pieces of identical unipolar plate are adopted to achieve fuel, oxidant and cooling fluid distribution requirements, a mould is adopted to prepare, significantly shorten the process exploitation time, reduce Design of Dies and processing charges, reduce manufacturing process complexity; The main flow field regions of bipolar plates adopts straight channel design, is applicable to the large area requirement of vehicle fuel battery, and flow field effective area is large simultaneously, improves PEMFC reaction efficiency, improves the energy rate density of PEMFC system; Metal bipolar panel configuration of the present invention is applicable to production in enormous quantities pattern, as drawing, mantle shaping and hydraulic expanding-forming etc., can realize fuel cell high efficiency, low cost manufacture, for the Industrialization of fuel cell car provides technical support.
Accompanying drawing explanation
Fig. 1 is vehicle fuel battery metal double polar plates fuel of the present invention or oxidant gas flow field schematic diagram;
Fig. 2 is vehicle fuel battery metal double polar plates cooling fluid flow field of the present invention schematic diagram;
Fig. 3 is vehicle fuel battery metal double polar plates entrance details drawing of the present invention;
Fig. 4 is vehicle fuel battery metal bipolar plate exit details drawing of the present invention;
Fig. 5 is vehicle fuel battery metal double polar plates cross section of fluid channel schematic diagram of the present invention;
Fig. 6 is vehicle fuel battery metal double polar plates path of welding schematic diagram of the present invention;
Fig. 7 is vehicle fuel battery metal double polar plates locate mode schematic diagram of the present invention;
Fig. 8 is the monocell performance chart of vehicle fuel battery metal double polar plates of the present invention assembling.
Wherein: dowel hole-1, fuel inlet-2, distribution district, flow field-3, patrol and examine mouth-4, seal groove-5, DC fields region-6, oxidant outlet-7, cooling liquid outlet-8, fuel outlet-9, set district, flow field-10, oxidant inlet-11, cooling fluid entrance-12, cooling fluid flow field-13, runner ridge-14, flow path groove-15, cooling fluid auxiliary entrance-16, cooling fluid main-inlet-17, cooling fluid entrance distributing trough-18, "-point three " structure-19 is distributed in flow field, cooling fluid pilot outlet-20, cooling fluid primary outlet-21, cooling liquid outlet distributing trough-22, flow field set " three-in-one " structure-23, path of welding-24, bipolar plates-25, alignment pin-26, positioning fixture-27, locate half pin-and-hole-28, location end face-29.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
The present embodiment is implemented under following implementation condition and technical requirement condition:
Process press forming die according to vehicle fuel battery large-area metal bipolar plate structure Schematic design as shown in figures 1-4, comprise upper die and lower die.Adopt the preparation of precision stamping forming technology to have the unipolar plate of flow field configuration as shown in Figure 1, stamping press is 200 tons, and drawing velocity is 30 seconds/sheet.Plate material is Stainless steel 316, and material thickness is 0.1mm, after trimming unipolar plate overall dimensions be 100 × 400mm.As shown in Figure 5, the dark h of flow path groove 15 is 0.5mm, and the wide w of flow path groove 15 is 1.2mm, the wide n1.0mm of ridge 14, and after two pieces of identical unipolar plate combinations, side forms fuel flow channel a, and opposite side forms oxidant flow channel b, and intermediate course forms coolant flow channel c.
Bipolar plates is formed by connecting by two pieces of identical unipolar plate, two pieces of unipolar plate are equipped with fuel import and export, oxidant import and export, cooling fluid is imported and exported and flow field, flow field wherein in the unipolar plate of side connects fuel and imports and exports as fuel flow field, flow field in opposite side unipolar plate connects oxidant and imports and exports as oxidant flow field, after two pieces of unipolar plate clampings, interlayer forms the cooling fluid flow field connecting cooling fluid and import and export, and is three and enters three and go out structure, realize two plates, three functions.As described in Figure 1, for bipolar plates fuel gas flow field schematic diagram, this unipolar plate is provided with fuel inlet 2, fuel outlet 9, oxidant outlet 7, oxidant inlet 11, cooling liquid outlet 8, cooling fluid entrance 12, and connect fuel inlet 2 and fuel outlet 9 flow field, wherein fuel inlet and fuel inlet 2 lay respectively at unipolar plate two ends with oxidant inlet and oxidant inlet 11, and Rotational Symmetry, the distribution district, flow field 3 that flow field is made up of the drainage trough at fuel inlet 2 place, the set district, flow field 10 of the drainage trough composition at fuel outlet 9 place, and connect the direct current groove in distribution district, flow field 3 and district of set district 10, flow field and DC fields region 6 forms, corresponding three direct current grooves of each drainage trough, fuel gas to the DC fields region 6 that drainage trough flow field being distributed district 3 is introduced is divided into three strands of gases, " one point three " structure 19 is distributed in flow field, as shown in Figure 3, then (flow field set " three-in-one " structure 23 is converged in set district, flow field 10, flow out afterwards as shown in Figure 4).Seal groove 5 is provided with at each fluid inlet and outlet and flow field periphery.
Unipolar plate DC fields region 6 runner number is 45, and distribution district, flow field 3 and set district 10, flow field place's runner number are 15.The wide 2.0mm of seal groove 5, dark 0.5mm.Two pieces of identical unipolar plate adopt fiber laser to be welded into large-area metal bipolar plates 25, and as shown in Figure 6, bonding power is 200W to path of welding 24, and speed of welding is 50mm/s.Metal double polar plates self-assembling formation " three enter three goes out " structure after welding, there are 10 cooling fluid entrance distributing troughs 18 at cooling fluid entrance 12 place, and there are 8 cooling liquid outlet distributing troughs 22 at cooling liquid outlet 8 place.The length of cooling fluid entrance 12 and cooling liquid outlet 8 is 13mm, and width is 5.4mm, and cooling fluid main-inlet 17 and cooling fluid primary outlet 21 length are 5mm, and cooling fluid auxiliary entrance 16 and cooling fluid pilot outlet 20 length are 3mm, are highly 1.0mm.As shown in Fig. 7 (a), the present embodiment adopts pin-hole locate mode, and alignment pin 26 and location hole 27 diameter are 4mm; Patrol and examine mouth 4 for rectangular configuration, length and width are 5mm, and Circularhole diameter is 2mm.
The vehicle fuel battery large-area metal bipolar plates integral planar degree adopting enforcement 1 to prepare is 2.0mm (range method measurement); Runner height tolerance is ± 20 μm.The bipolar plates assembling monocell adopting the present embodiment to prepare, power density curve embodiment 1 curve as shown in Figure 8 of acquisition, peak power density reaches 865mW/cm
2.Test condition: anode and cathode catalysis agent content: 0.4mg.Pt/cm
-2, proton exchange membrane is Nafion212, and stack temperature is 80 DEG C, and negative electrode, anode reaction temperature degree are 80 DEG C, and humidity is 100%, and pressure is 0.3MPa.
Embodiment 2
The present embodiment adopts mantle forming technology preparation vehicle fuel battery large-area metal bipolar plates as shown in figures 1-4.According to flow field configuration processing patrix, adopt hardness be the polyurethane material of 55 ° as mantle, the thick stainless steel 304 light sheet material of 0.2mm is placed between patrix and mantle.Plastic force is 300 tons, and forming speed is 60 seconds/sheet.Be shaped and trimming after unipolar plate overall dimensions be 100 × 400mm.As shown in Figure 5, flow path groove 15 is 0.4mm deeply, and flow path groove 15 is wide is 1.5mm, the wide 1.2mm of ridge 14.Unipolar plate DC fields region 6 runner number is 27, and distribution district, flow field 3 and set district 10, flow field place's runner number are 9.The wide 3.0mm of seal groove 5, dark 0.4mm.Two pieces of identical unipolar plate adopt resistance spot welding to connect into large-area metal bipolar plates, and as shown in Figure 6, adjacent welds spacing is 3mm to path of welding.Metal double polar plates self-assembling formation " three enter three goes out " structure after welding, there are 8 cooling fluid entrance distributing troughs 18 at cooling fluid entrance 12 place, and there are 6 cooling liquid outlet distributing troughs 22 at cooling liquid outlet 8 place.The length of cooling fluid entrance 12 and cooling liquid outlet 8 is 13mm, and width is 5.4mm, and cooling fluid main-inlet 17 and cooling fluid primary outlet 21 length are 5mm, and cooling fluid auxiliary entrance 16 and cooling fluid pilot outlet 20 length are 3mm, are highly 0.8mm.As shown in Fig. 7 (b), the present embodiment adopts pin-semicircle orifice locate mode, and alignment pin 26 and location half pin-and-hole hole 28 diameter are 6mm; Patrol and examine mouth 4 for semicircular structure, outside diameter is 5mm, and interior Circularhole diameter is 2mm.
Adopt and implement 1 identical method of measurement and measurement parameter, vehicle fuel battery large-area metal bipolar plates integral planar degree prepared by embodiment 2 is 2.5mm; Runner height tolerance is ± 25 μm.The bipolar plates assembling monocell adopting the present embodiment to prepare, power density curve embodiment 2 curve as shown in Figure 8 of acquisition, peak power density reaches 671mW/cm
2.
Embodiment 3
The present embodiment adopts Hydroform process preparation vehicle fuel battery large-area metal bipolar plates as shown in figures 1-4.Process monolateral mould according to flow field configuration, adopt viscosity coefficient be the hydraulic oil of 55 as shaping medium, 0.1mm thick stainless steel 304 light sheet material side and monolateral contacting dies also seal, and opposite side contacts with hydraulic oil, regulates plastic force by hydraulic cylinder.The present embodiment forming liquid pressure is 350MPa, and forming speed is 120 seconds/sheet.Be shaped and trimming after unipolar plate overall dimensions be 100 × 400mm.As shown in Figure 5, flow path groove 15 is 0.6mm deeply, and flow path groove 15 is wide is 0.8mm, the wide 0.5mm of ridge 14.Unipolar plate DC fields region 6 runner number is 75, and distribution district, flow field 3 and set district 10, flow field place's runner number are 25.The wide 1.5mm of seal groove 5, dark 0.6mm.Two pieces of identical unipolar plate adopt gluing method to connect into large-area metal bipolar plates, and as shown in Figure 6, adhesives is epoxy resin in bonding path.Metal double polar plates self-assembling formation " three enter three goes out " structure after bonding, there are 12 cooling fluid entrance distributing troughs 18 at cooling fluid entrance 12 place, and there are 10 cooling liquid outlet distributing troughs 22 at cooling liquid outlet 8 place.The length of cooling fluid entrance 12 and cooling liquid outlet 8 is 13mm, and width is 5.4mm, and cooling fluid main-inlet 17 and cooling fluid primary outlet 21 length are 5mm, and cooling fluid auxiliary entrance 16 and cooling fluid pilot outlet 20 length are 3mm, are highly 1.2mm.As shown in Fig. 7 (c), the present embodiment adopts end face locate mode, and location section 29 length is 10mm, becomes miter angle with pole plate edge; Patrol and examine mouth 4 for rectangular configuration, length and width are 5mm, and Circularhole diameter is 2mm.
Adopt and implement 1 identical method of measurement and measurement parameter, vehicle fuel battery large-area metal bipolar plates integral planar degree prepared by embodiment 3 is 1.5mm; Runner height tolerance is ± 15 μm.The bipolar plates assembling monocell adopting the present embodiment to prepare, power density curve embodiment 2 curve as shown in Figure 7 of acquisition, peak power density reaches 793mW/cm
2.
Embodiment 1 forming efficiency and joint efficiency are far away higher than embodiment 2 and 3, and in enormous quantities, the low cost that are applicable to vehicle fuel battery manufacture demand.Although bipolar plates flatness prepared by embodiment 1 and runner height tolerance are greater than embodiment 3, its final battery performance, higher than embodiment 3, illustrates that its flow field configuration and runner parameter are for optimum.Therefore, the embodiment 1 vehicle fuel battery large-area metal bipolar plates configurations of recommending for the present invention and manufacture method.Above-mentioned example is only case, the present invention is not limited thereto example.Other formal transformations that those skilled in the art's technical scheme according to the present invention is done; as material category, material thickness, bipolar plates overall dimensions, runner parameter, seal groove parameter etc.; but only have flow field configuration to adopt the structure similar to the present invention with gas/liquid distribution openings structure, still belong within scope.
Claims (6)
1. the large-area metal bipolar plates of a vehicle fuel battery, it is characterized in that, this bipolar plates is formed by connecting by two pieces of identical unipolar plate, two pieces of unipolar plate are equipped with fuel import and export, oxidant import and export, cooling fluid is imported and exported and flow field, flow field wherein in the unipolar plate of side connects fuel and imports and exports as fuel flow field, flow field in opposite side unipolar plate connects oxidant and imports and exports as oxidant flow field, after two pieces of unipolar plate clampings, interlayer forms the cooling fluid flow field connecting cooling fluid and import and export, be three to enter three and go out structure, realize two plates, three functions;
Fuel inlet in described unipolar plate and oxidant inlet lay respectively at unipolar plate two ends, and Rotational Symmetry, flow field in unipolar plate is made up of the drainage trough at two ends and the direct current groove of centre, described drainage trough one end connects fuel and imports and exports or oxidant import and export, the other end connects direct current groove, corresponding three direct current grooves of each drainage trough, the fuel gas introduce drainage trough or oxidant gas are divided into three strands of gases;
Described unipolar plate adopts drawing by the metallic sheet stock that 0.1 ~ 0.2mm is thick, mantle is shaped or hydraulic expanding-forming is shaping; Two pieces of unipolar plate are connected by gluing, resistance spot welding or laser welding.
2. the large-area metal bipolar plates of a kind of vehicle fuel battery according to claim 1, is characterized in that, the number of described drainage trough is 9 ~ 25.
3. the large-area metal bipolar plates of a kind of vehicle fuel battery according to claim 1, is characterized in that, described cooling fluid is imported and exported and is divided into large mouth and osculum, and the large mouth of bipolar plates the same side is connected with osculum; Large mouth connects 8 ~ 12 cooling fluid distributing troughs, and osculum connects 6 ~ 10 cooling fluid distributing troughs, and the cooling fluid distributing trough that large mouth and osculum are connected separately misplaces and arranges, forms cooling fluid flow field.
4. the large-area metal bipolar plates of a kind of vehicle fuel battery according to claim 1, is characterized in that, described bipolar plates overall dimensions is 100 × 400mm, and flow field effective area is greater than 90%; Bipolar plates main body is straight parallel flow field, and runner number is 27 ~ 75; Its cross section of fluid channel is rectangle, and groove depth is 0.4 ~ 0.6mm, and groove width is 0.8 ~ 1.5mm, and ridge is wide is 0.5 ~ 1.2mm, and radius of corner is 0.05 ~ 0.2mm; Seal groove cross section is rectangle, and sealing groove width is 1.5 ~ 3.0mm, and depth of sealing groove is 0.4 ~ 0.6mm.
5. the large-area metal bipolar plates of a kind of vehicle fuel battery according to claim 1, is characterized in that, described bipolar plates periphery is provided with dowel hole, locates half pin-and-hole or location end face.
6. the large-area metal bipolar plates of a kind of vehicle fuel battery according to claim 1, is characterized in that, described bipolar plates side is also provided with patrols and examines mouth, and described mouth of patrolling and examining is rectangle or semicircle.
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| CN201210509907.1A CN102969513B (en) | 2012-12-03 | 2012-12-03 | Large-area metal bipolar plate for automobile fuel cell |
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| CN201210509907.1A CN102969513B (en) | 2012-12-03 | 2012-12-03 | Large-area metal bipolar plate for automobile fuel cell |
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| CN102969513B true CN102969513B (en) | 2015-05-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114597437A (en) * | 2022-03-16 | 2022-06-07 | 浙江锋源氢能科技有限公司 | Metal bipolar plate and direct methanol fuel cell |
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| CN101867053A (en) * | 2010-06-25 | 2010-10-20 | 清华大学 | Fuel cell stack for jointly applying intraplate counter-flow flow field and interpolate counter-flow flow field |
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| CN100595957C (en) * | 2007-12-13 | 2010-03-24 | 上海交通大学 | Metal sheet profiled proton exchange membrane fuel cell bipolar plate |
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| CN101867053A (en) * | 2010-06-25 | 2010-10-20 | 清华大学 | Fuel cell stack for jointly applying intraplate counter-flow flow field and interpolate counter-flow flow field |
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