CN105870476B

CN105870476B - PEM fuel cell heap and its flow field board group

Info

Publication number: CN105870476B
Application number: CN201610250337.7A
Authority: CN
Inventors: 李骁; 赵锋
Original assignee: TROOWIN POWER SYSTEM TECHNOLOGY Co Ltd
Current assignee: TROOWIN POWER SYSTEM TECHNOLOGY Co Ltd
Priority date: 2016-04-21
Filing date: 2016-04-21
Publication date: 2019-06-07
Anticipated expiration: 2036-04-21
Also published as: CN105870476A

Abstract

The present invention provides a kind of cathode flow field plate for fuel cell, wherein the fuel cell has a membrane electrode assembly, it is characterized in that, including a cathode flow field plate, wherein the cathode flow field plate is positioned to seal the membrane electrode assembly, wherein the cathode flow field plate have one group of fluid channel and one group of cooling duct, wherein the cooling duct respectively it is opposite with the fluid channel itself and be connected.

Description

PEM fuel cell heap and its flow field board group

Technical field

The present invention relates to field of fuel cell technology, the more particularly, to polymerization of proton exchange membrane (PEM) fuel cell Object hull cell heap.

Background technique

Fuel cell is a kind of energy source, can be by reactive substance, the chemistry participated in such as oxygen or other oxidants The chemical energy from fuel is converted electric energy by reaction.Hydrogen is the most common fuel in such battery.Wherein, most representative The example of such fuel cell technology is exactly proton exchange membrane (PEM) fuel cell.This types of fuel cells includes membrane electrode assembly (MEA), which includes the polymer dielectric film being clipped between two layers of the catalyst coat paper respectively as yin-yang grade；It should Membrane electrode assembly (MEA) is clipped in again between a pair of of flow-field plate, is related to fuel and oxidant respectively.The work of the fuel cell is former Reason is the following steps are included: hydrogen fuel is passed through in the anode flow field board of fuel cell side, then oxidant is passed through fuel cell In the cathode flow field plate of the other side；Platinum catalyst (or other catalyst), which is placed in anode-side, makes hydrogen be separated into positive charge hydrogen matter Son and negative electrical charge hydrogen electronics；Polymer dielectric film enters cathode after only positive charge Hydrogen Proton being made to pass through, and negative electrical charge hydrogen is electric Sub then need to enter cathode by the channel of peripheral hardware, electric current generates at this time；In cathode side, electronics and positive charge proton and oxygen knot Exclusive product is discharged as the battery in symphysis Cheng Shui.In addition, because oxygen is to be blown into cathode flow field plate, therefore can make the fuel Battery is cooling.Cathode flow field plate, which can be used, to be exposed in air as a kind of " open cathode structure ".

Traditional cathode flow field plate design uses saw-like or square-wave-shaped structure, and air can be blown into it by air blower or fan In.Water cooling type battery pile is compared, Luftgekuhlte rotierende battery pile, which has, is easier to balanced design and strategy easier to control, can be stood Start.

Using a major technique difficulty of the Luftgekuhlte rotierende proton exchange membrane fuel cell of polymer electrolyte film Point is heat and water process management.Wherein polymer electrolyte film needs to have high-moisture to keep the low electricity in inherence of film Resistance.When air-flow passes through flow field plate channel, the evaporation that can be cooled down battery pile, but equally accelerate moisture leads to water content in film It reduces.Therefore, rotation speed of the fan is needed according to the extremely careful control of flow, environment temperature and relative humidity (control strategy) to reach To balance.Unsuitable rotation speed of the fan will lead to the output power decline of battery pile.

Another limitation using the Luftgekuhlte rotierende proton exchange membrane fuel cell of polymer electrolyte film is hydrogen Leakage.In traditional design, saw-like cathode flow field plate is towards membrane electrode assembly comprising polymer electrolyte film and two sides Catalyst layer.Therefore, only sawtooth is pressed on washer, and the other parts in the region do not receive the pressure of sawtooth and are difficult to close Envelope, so that becoming potential hydrogen leaks region.In addition, the design generally defines hydrogen operating pressure less than 0.5bar.g.However, compared with High hydrogen pressure can promote dynamics, battery homogeneity, load variation response and reduction hydrogen starvation (seriously to damage fuel cell Durability degree) probability of happening, but be higher than design pressure value may result in leakage or washer explosion.

Summary of the invention

It is a primary object of the present invention to it to provide a kind of fuel cell, and wherein the fuel cell is combined with hands over for proton The flow field board group of membrane cell is changed, to prevent hydrogen from leaking.

It is a further object of the present invention to provide a kind of flow field board groups, and wherein the flow field board group allows higher operation of fuel cells Pressure and raising cooling efficiency.This performance boost as the fuel cell in high-energy density energy source power-weight ratio and Cruising ability.

It is a further object of the present invention to provide a kind of flow field board group, wherein the inside of the cathode flow field plate of the flow field board group and The inside of anode flow field board forms the continuous level on two opposites of practising physiognomy, so that the cathode flow field plate of the flow field board group is interior Only need one sealing film of setting that inside and the anode of the cathode flow field plate can be realized between side and the inside of anode flow field board Sealing between the inside of flow-field plate.Further, the single sealing film of the flow field board group realizes the inside of the cathode flow field plate Sealing between the inside of the anode flow field board, so that the reduction of the assembly difficulty of the flow field board group.

It is a further object of the present invention to provide a kind of flow field board groups for proton exchange membrane fuel cell, are somebody's turn to do with realizing Proton exchange membrane fuel cell can work without hydrogen leakage under the conditions of pressure is greater than 0.5bar.g and therefore and grasp Make safer.

It is a further object of the present invention to provide a kind of flow field board groups for proton exchange membrane fuel cell, are somebody's turn to do with realizing Proton exchange membrane fuel cell can pressure be greater than 0.5bar.g under the conditions of work so that the fuel cell compared to Traditional fuel cell, dynamics, battery consistency, load variation response are elevated to be lowered with hydrogen starvation generation probability.

It is a further object of the present invention to provide a kind of flow field board groups for proton exchange membrane fuel cell, to promote sky Air cooling efficiency, to allow using the thinner flow-field plate that can reduce gross weight power ratio.

It is a further object of the present invention to provide a kind of flow field board groups for proton exchange membrane fuel cell, to reduce matter Sensibility of the water content of proton exchange to rotation speed of the fan.

It is a further object of the present invention to provide a kind of flow field board group for proton exchange membrane fuel cell, the wherein stream The newly-designed flow-field plate of field plate group is easier to realize sealing and prevents hydrogen from leaking.

It is a further object of the present invention to provide a kind of flow field board groups for proton exchange membrane fuel cell, and wherein this is new The flow-field plate of design is applicable to be assemblied in most of traditional proton exchange membrane fuel cells.

It is a further object of the present invention to provide a kind of flow field board groups for proton exchange membrane fuel cell, and wherein this is new The flow-field plate of design is easy to use, structure is simple and manufacturing cost is cheap.

Other purposes and feature of the invention are able to fully demonstrate and can be by appended rights by following detailed descriptions The combination of the means and device specially pointed out in it is required that is achieved.

According to the present invention, foregoing purpose and other purposes and advantage are by a kind of air cooling proton exchange fuel cell heap by reality It is existing.

According to the present invention, foregoing purpose and other purposes and advantage are implemented by a kind of fuel cell, wherein fuel electricity Pond includes a membrane electrode assembly and a flow-field plate group.

The flow field board group includes a cathode flow field plate and an anode flow field board, and wherein the membrane electrode assembly is sealed in this Between cathode flow field plate and the anode flow field board, wherein the cathode flow field plate has a planar side, an opposite channel side and one Group is formed in the fluid channel of the channel side, and wherein the planar side is located at the one of the cathode flow field plate towards the outer of membrane electrode assembly Side, wherein the fluid channel is arranged for enabling a fluid to flow to the membrane electrode assembly along the fluid channel, to promote electrification Learn reaction and occur and produce electricl energy across the membrane electrode, wherein the anode flow field board have a planar side, one it is opposite logical Road side and at least one fuel channel, wherein the planar side of the anode flow field board is located at an inside of the anode flow field board, The channel side of the anode flow field board is located at an outside of the anode flow field board and seals the membrane electrode assembly, wherein the anode stream Each of field plate fuel channel is formed in the channel side of the anode flow field board, and wherein the fuel channel is arranged for making to fire Material can be provided to the membrane electrode assembly by the fuel channel.

Correspondingly, the present invention further provides a kind of cathode flow field plates for fuel cell, and wherein the fuel cell has There is a membrane electrode assembly comprising a cathode flow field plate, wherein the cathode flow field plate is positioned to seal the membrane electrode assembly, In the cathode flow field plate have one group of fluid channel and one group of cooling duct, wherein the cooling duct respectively with the fluid channel phase To its be connected.

Correspondingly, the present invention further provides a kind of anode flow field boards for fuel cell, and wherein the fuel cell has There is a membrane electrode assembly comprising an anode flow field board, wherein the anode flow field board has a planar side and a channel Side, wherein the planar side is located at an inside of the anode flow field board, and wherein the channel side is located at one of the anode flow field board Outside, wherein the channel side of the anode flow field board be set be suitable for seal the membrane electrode assembly, wherein the anode flow field board into One step includes at least one fuel channel, and wherein the fuel channel is formed in the channel side towards the membrane electrode assembly, to make Fuel can be provided to the membrane electrode assembly by the fuel channel.

The present invention furthermore provides a kind of flow field board group for fuel cell, and wherein the fuel cell has at least one A membrane electrode assembly comprising at least two flow-field plates, wherein the membrane electrode assembly of the fuel cell is separately positioned on adjacent two Between a flow-field plate, wherein each flow-field plate includes a cathode plate body, an anode plate body and one group of guidance wall, the wherein yin Pole plate body forms one group of first fluid slot spaced apart from each other, and wherein the guidance wall is spaced apart in the cathode plate body and is somebody's turn to do Between anode plate body, so that each adjacent two guidance wall forms the second fluid slot being located between the two, wherein should The first fluid slot of cathode plate body is set to be connected with the second fluid slot respectively so that each first fluid slot with Corresponding second fluid slot forms at least one continuous fluid channel, and wherein there is the fluid channel first passage to open Mouth, a second channel opening and a third channel opening, wherein the anode plate body of the flow-field plate has at least one quilt The fuel channel in one outside of the anode plate body is set, wherein the sun of the previous flow-field plate of each adjacent two flow-field plate Membrane electrode assembly being arranged between two neighboring flow-field plate towards the fuel cell is set in the outside of pole plate body, from And it allows the fuel to be provided to the membrane electrode assembly by the fuel channel, the fluid of the cathode plate body of the latter flow-field plate The third channel opening in channel is set towards the membrane electrode assembly, so that the fluid channel allows fluid to flow in the stream The first passage in body channel is open between second channel opening, and is provided to the fuel by third channel opening The membrane electrode assembly of battery

The present invention furthermore provides a kind of fuel cell comprising at least one membrane electrode assembly and a flow field board group, Wherein the flow field board group include at least two flow-field plates, wherein the membrane electrode assembly be respectively set at two neighboring flow-field plate it Between, wherein each flow-field plate includes a cathode plate body, an anode plate body and one group of guidance wall, wherein the cathode plate body is formed One group of first fluid slot spaced apart from each other, wherein the guidance wall be spaced apart the cathode plate body and the anode plate body it Between, so that each adjacent two guidance wall forms one and is located at second fluid slot between the two, the wherein cathode plate body The first fluid slot is set to be connected with the second fluid slot respectively, so that each first fluid slot and corresponding second Fluid slot forms at least one continuous fluid channel, and wherein the fluid channel has first passage opening, one second Access portal and a third channel opening, wherein there is the anode plate body of the flow-field plate at least one to be arranged on the anode The fuel channel in one outside of plate body, wherein the outside of the anode plate body of the previous flow-field plate of two neighboring flow-field plate It is set towards the membrane electrode assembly being arranged between two neighboring flow-field plate, to allow the fuel to through the fuel channel It is provided to the membrane electrode assembly, the third channel opening of the fluid channel of the cathode plate body of the latter flow-field plate is set Towards the membrane electrode assembly, it is open and is somebody's turn to do in the first passage of the fluid channel so that the fluid channel allows fluid to flow Between second channel opening, and the membrane electrode assembly is provided to by third channel opening.

Correspondingly, the present invention furthermore provides a kind of flow field board group for fuel cell, wherein fuel electricity Pond has at least one membrane electrode assembly comprising at least two flow-field plates, wherein the membrane electrode assembly of the fuel cell is distinguished It is arranged between two neighboring flow-field plate, wherein each flow-field plate is drawn including a cathode plate body, an anode plate body and one group Wall is led, wherein the cathode plate body forms one group of first fluid slot spaced apart from each other, and wherein the guidance wall is spaced apart Between the cathode plate body and the anode plate body, so that each adjacent two guidance wall forms one positioned at second between the two Fluid slot, wherein the first fluid slot of the cathode plate body is set is connected with the second fluid slot respectively, so that often A first fluid slot forms at least one continuous fluid channel with corresponding second fluid slot, and wherein the fluid channel has one A first passage opening, a second channel opening and a third channel opening, wherein the anode plate body of the flow-field plate has There is at least one to be arranged on the fuel channel in an outside of the anode plate body, wherein each adjacent two flow-field plate is previous Being arranged between two neighboring flow-field plate towards the fuel cell is set in the outside of the anode plate body of flow-field plate The membrane electrode assembly, to allow the fuel to be provided to the membrane electrode assembly by the fuel channel, the yin of the latter flow-field plate The third channel opening of the fluid channel of pole plate body is set towards the membrane electrode assembly, so that the fluid channel allows Fluid flows between the first passage opening and second channel opening of the fluid channel, and is open by the third channel It is provided to the membrane electrode assembly of the fuel cell.

The present invention furthermore provides a kind of fuel cell comprising at least one membrane electrode assembly and at least two flow fields Plate, wherein the membrane electrode assembly is separately positioned between two neighboring flow-field plate, wherein each flow-field plate includes a flow-field plate Body, one group of first guidance wall and one group of second guidance wall, wherein the flow field plate body has a cathode side and an anode-side, In the flow field plate body have at least one be arranged on the fuel channel of the anode-side, wherein this first guidance wall be spaced ground The cathode side of the flow field plate body is set, which extends from the first guidance wall respectively, so that adjacent two A first guidance wall forms the first fluid channel being located between the two, and corresponding two neighboring second guidance wall is formed One second fluid channel being located between the two, wherein the first fluid channel is connected with the second fluid channel, wherein There are two first passages to be open for each first fluid channel tool, and each second fluid channel has a second channel opening, In the anode-side of the flow field plate body of previous flow-field plate of two neighboring flow-field plate be set towards being arranged on adjacent two The membrane electrode assembly between a flow-field plate, thus allow the fuel to be provided to the membrane electrode assembly by the fuel channel, and after The second channel opening in the second fluid channel of the flow field plate body of one flow-field plate is set towards the fuel cell The membrane electrode assembly, so that the first fluid channel, which allows fluid to flow, is open it in the first passage of the fluid channel Between, and be open by the second channel in the second fluid channel and be provided to the membrane electrode assembly of the fuel cell.

Correspondingly, the present invention furthermore provides a kind of flow field board group for fuel cell, and wherein the fuel cell has There is at least one membrane electrode assembly comprising at least two flow-field plates, wherein the membrane electrode assembly of the fuel cell is set individually Between two neighboring flow-field plate, wherein each flow-field plate includes a flow field plate body, one group of first guidance wall and one group second Wall is guided, wherein the flow field plate body has a cathode side and an anode-side, and wherein the flow field plate body has at least one quilt The fuel channel of the anode-side is set, and wherein the first guidance wall is spaced apart the cathode in the flow field plate body Side, which extends from the first guidance wall respectively, so that two neighboring first guidance wall forms one and is located at First fluid channel between the two, and corresponding two neighboring second guidance wall form the second being located between the two Body channel, wherein the first fluid channel is connected with the second fluid channel, wherein there are two the tools of each first fluid channel First passage opening, each second fluid channel has a second channel opening, wherein two neighboring flow-field plate is previous The anode-side of the flow field plate body of flow-field plate is set towards the membrane electrode assembly being arranged between two neighboring flow-field plate, To allow the fuel to being somebody's turn to do for the flow field plate body for being provided to the membrane electrode assembly and the latter flow-field plate by the fuel channel The membrane electrode assembly towards the fuel cell is set in the second channel opening in second fluid channel, so that this is first-class Body channel allows fluid to flow between the first passage of the fluid channel is open, and by the second fluid channel this Two access portals are provided to the membrane electrode assembly of the fuel cell.

By the understanding to subsequent description and attached drawing, further aim of the present invention and advantage will be fully demonstrated.

These and other objects of the invention, feature and advantage, by following detailed descriptions, drawings and claims are obtained To fully demonstrate.

Detailed description of the invention

Figure 1A is the installation diagram of the flow field board group of pem fuel cell stack according to the preferred embodiment of the invention.

Figure 1B is according to the another of the flow field board group of the pem fuel cell stack of aforementioned present invention preferred embodiment Installation diagram.

Fig. 2A is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The top view of cathode flow field plate.

Fig. 2 B is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The bottom view of cathode flow field plate.

Fig. 3 A is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The top view of anode flow field board.

Fig. 3 B is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The bottom view of anode flow field board.

Fig. 4 illustrates the pem fuel cell stack according to aforementioned present invention preferred embodiment, wherein the proton Exchange film fuel battery heap uses above-mentioned flow field board group.

The cathode flow field plate and anode flow field board that Fig. 5 A illustrates above-mentioned flow field board group are in preferred embodiment according to the present invention The pem fuel cell stack in be stacked on top of one another together.

Fig. 5 B is the partial sectional view according to the pem fuel cell stack of aforementioned present invention preferred embodiment.

Fig. 5 C is the magnified partial view according to the pem fuel cell stack of aforementioned present invention preferred embodiment.

Fig. 6 is the cross-sectional view according to the pem fuel cell stack of aforementioned present invention preferred embodiment.

Fig. 7 A illustrates the flow-field plate of the pem fuel cell stack according to aforementioned present invention preferred embodiment A kind of optional implementation of group.

Fig. 7 B is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The partial sectional view of the optional implementation of the cathode flow field plate.

Fig. 7 C is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The magnified partial view of the optional implementation of the cathode flow field plate.

Fig. 8 A illustrates the flow-field plate of the pem fuel cell stack according to aforementioned present invention preferred embodiment The optional implementation of another kind of group.

Fig. 8 B is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The cross-sectional view of the flow-field plate of the optional implementation.

Fig. 8 C is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The top view of the cathode plate body of the flow-field plate of the optional implementation.

Fig. 8 D is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The top view of the anode plate body of the flow-field plate of the optional implementation.

Fig. 8 E is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The bottom view of the cathode plate body of the flow-field plate of the optional implementation.

Fig. 8 F is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The bottom view of the anode plate body of the flow-field plate of the optional implementation.

Fig. 9 A illustrates the flow-field plate of the pem fuel cell stack according to aforementioned present invention preferred embodiment The optional implementation of another kind of group.

Fig. 9 B is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The cross-sectional view of the flow-field plate of the optional implementation.

Fig. 9 C is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The top view of the support plate of the flow-field plate of the optional implementation.

Fig. 9 D is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The top view of the flow field plate body of the flow-field plate of the optional implementation.

Fig. 9 E is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The bottom view of the support plate of the flow-field plate of the optional implementation.

Fig. 9 F is the flow field board group according to the pem fuel cell stack of aforementioned present invention preferred embodiment The bottom view of the flow field plate body of the flow-field plate of the optional implementation.

Specific embodiment

It is described below to be disclosed for so that those skilled in the art manufacture and use the present invention.Middle offer described below compared with Good embodiment only as the example and modification that will be apparent to those skilled in the art, does not constitute the limit to the scope of the invention System.General Principle defined in described below can be applied to without departing substantially from spirit of that invention and invention scope other embodiments, Optional substitution, modification, equivalent implementation and application.

With reference to Figure 1A to Fig. 6 of attached drawing, it is elucidated with according to the proton exchange fuel cell heap of present pre-ferred embodiments.The matter Son exchange fuel cell pack includes one or more cell of fuel cell being stacked together.Preferably implement according to of the invention Example, each cell of fuel cell of the proton exchange fuel cell heap can be formed as an individual fuel cell comprising One membrane electrode assembly 10 and a flow field board group 20, wherein the flow field board group 20 includes two bipolar plates conducted with by the film Electrode group 10 is clipped between the two.

The membrane electrode assembly 10 includes a polymer dielectric film, and is coated on urging for the polymer dielectric film two sides Agent.Two gas diffusion layers are located at two lateral surfaces of the membrane electrode assembly membrane electrode assembly 10, wherein the gas diffusion layers It is maintained between the conductive bipolar plate of the flow field board group 20, to form a stacks of cells.

As shown in Figure 1A to Fig. 6 of attached drawing, this is used to clamp the membrane electrode assembly 10 in the flow field board group 20 between the two The conductive bipolar plate be an anode flow field board 21' and a cathode flow field plate 21.In other words, which includes One anode flow field board 21 ' and a cathode flow field plate 21, and the membrane electrode assembly 10 is sealed and is clipped in the anode flow field board 21 ' Between the cathode flow field plate 21, wherein the cathode flow field plate 21 has an inside and an outside, wherein the cathode flow field The inside of plate 21 forms a planar side 211 and the outside of the cathode flow field plate 21 forms a channel side 212, wherein The planar side 211 of the cathode flow field plate 21 is set towards the membrane electrode assembly 10, and wherein the cathode flow field plate 21 further has There is one group of fluid channel for being formed in the channel side 212 213, wherein each fluid channel 213 is from the cathode flow field plate 21 The outside extend to the penetrating type channel on the inside of this of the cathode flow field plate 21, enable fluid to along the fluid channel 213 The membrane electrode assembly 10 is flowed to, occurs and produces electricl energy so that electrochemical reaction be promoted to pass through the membrane electrode assembly 10.In other words, often A fluid channel 213 can extend to the channel side of the cathode flow field plate 21 from the planar side 211 of the cathode flow field plate 21 212, so that fluid can flow to the membrane electrode assembly 10 along the fluid channel 213.Especially, which is to wear Saturating type channel, the inside of the cathode flow field plate 21 is flowed to the edge for guiding fluid from the cathode flow field plate 21, wherein The inside of the cathode flow field plate 21 is towards the membrane electrode assembly 10.Correspondingly, which is reaction gas, such as air.

It is understood that the fuel cell pack of the Proton Exchange Membrane Fuel Cells in actual use includes multiple stackings Monoreactant set, requires according to electric consumption, and quantity may be hundreds of.Therefore, an exemplary fuel cell stack includes one The repetition battery unit set of series.The cathode flow field plate 21 (or anode flow field board 21') can be by light and firm conduction material Material is constituted.The fluid channel 213 extends to the entire side edge length of the cathode flow field plate 21 and extends to this by preset depth In cathode flow field plate 21.The fluid channel 213 equally forms ridge shape protrusion from the cathode flow field plate 21 haveing not been cut, and These ridge shape protrusions are distribution separatedly, equably.

Such as Fig. 2A and Fig. 2 B of attached drawing, each fluid channel 213 is an elongated channel, so that two access portals It is respectively formed at two edges of the cathode flow field plate 21.Therefore, which will flow to the fluid channel from the access portal 213 and the planar side 211 of the cathode flow field plate 21 is flowed to across the channel side 212 of the cathode flow field plate 21, with reach should Membrane electrode assembly 10.

Such as Fig. 2 B and Fig. 6 of attached drawing, which further has one group of cooling duct 217, the wherein cooling Channel 217 aligns with the fluid channel 213 respectively, to make the cathode stream when the fluid is flowed along the fluid channel 213 The heat of field plate 21 is radiated.Preferably, which is to be formed uniformly in the penetrating type channel of the cathode flow field plate 21, To align respectively with the fluid channel 213.

Such as Fig. 2A to Fig. 3 B of attached drawing, which includes a cathode plate body 214 and two opposite ends, Two first ends 215, wherein the cathode plate body 214 extends between two first ends 215, wherein the cathode plate body 214 Including two transverse edges 2141 and one group of guidance wall 216, wherein the guidance wall 216 extends in two transverse edges with being spaced Between 2141, wherein every two adjacent guide wall 216 to form the fluid channel 213 and be connected with the fluid channel 213 Cooling duct 217 therebetween, wherein each cooling duct 217 is set along the fluid channel 213, so that the fluid can Flow through the cooling duct 217.Preferably, first end 215 of the cathode flow field plate 21 and the two of the cathode plate body 214 A transverse edge 2141 forms a continuous sealing plane 2110 of the planar side 211 of the cathode flow field plate 21, so that When the fuel cell pack is stacked, the planar side 211 of the cathode flow field plate 21 can provide one for the membrane electrode assembly 10 Flat support, so that the membrane electrode assembly 10 be enable to be pressed on the anode flow field board 21 '.

As shown in Fig. 2A and Fig. 6 of attached drawing, each guidance wall 216 include one high-end 2161 and one from this high-end 2161 The low side 2162 extended downwardly, wherein every two adjacent guidance wall 216 is formed, to be located at its fluid between high-end 2161 logical The cooling duct 217 of road 213 and formation between its low side 2162.Therefore, the cooling duct 217 and the fluid channel 213 are connected to form a penetrating type channel, and wherein the penetrating type channel allows fluid to flow through the cooling duct 217 and the stream Body channel 213.Optionally, the low side 2162 be longer than this high-end 2161 so that the length of the cooling duct 217 is longer than the stream The length in body channel 213.

It is understood that be located at the cathode flow field plate 21 the fluid channel 213 be connected with the cooling duct 217 with This structure for forming a complete penetration type channel (or slot) can make the cooling duct 217 realize fuel cell pack of the present invention While heat sinking function, play the role of guiding external reaction active fluid to the fluid channel 213.Further, the yin Realize the dual function of gas supply and heat dissipation, and the first end of the cathode flow field plate 21 in the cooling duct 217 of pole flow-field plate 21 Portion 215, two transverse edges 2141 of the cathode plate body 214 and the membrane electrode assembly 10 have a bigger contact surface, thus Make fuel cell pack of the present invention that there is better heat dissipation effect and reduces rotation speed of the fan susceptibility.Correspondingly, with cooling effect Promotion and rotation speed of the fan susceptibility reduction, equal-wattage output under, need to construct compared with the existing technology is larger Fuel cell, the overall volume and weight of the fuel cell can be lowered.In addition, the present invention cooling duct 217 Construction can reduce the thickness of the cathode flow field plate 21.If the fluid channel design of traditional cathode flow field plate is 3mm depth, Traditional cathode flow field plate needs at least 4mm thickness, to keep the mechanical strength of cathode flow field plate and ensure radiating efficiency.And if It is cathode flow field plate 21 of the present invention, then when its fluid channel 213 is arranged to 3mm depth, the thickness of the cathode flow field plate 21 It then can be configured to be less than 4mm.In other words, which can be used as the configuration of a part of the fluid channel 213, so that The thickness of the cathode flow field plate 21 can be lowered.That is, when realizing identical heat dissipation area, the cathode flow field of the invention Plate 21 can more traditional template it is thinner；Because the cooling duct 217 of the invention can when fluid passes through the fluid channel 213 The entire cross section of the cathode flow field plate 21 is used as heat dissipation.Therefore, under more traditional template same thickness, the yin of the invention Pole flow-field plate 21 is capable of providing more heat dissipation regions for heat dissipation.

As shown in Fig. 3 A and Fig. 3 B of attached drawing, the anode flow field board 21 ' of the flow field board group 20 has an inside and one A outside is wherein planar side inside and outside the anode flow field board 21 '.The inside of the anode flow field board 21 ' forms one A channel side 212 ' and the outside form a planar side 211 ', wherein the channel side 212 ' formation of the anode flow field board 21 ' At least one fuel channel 213 ', wherein the fuel channel 213 ' is towards the membrane electrode assembly 10 so that fuel, such as hydrogen fuel, can lead to It crosses the fuel channel 213 ' and is provided to the membrane electrode assembly 10.The fuel channel 213 ' recess should the anode flow field board 21 ' Channel side 212 '.Preferably, which includes an anode plate body 214 ' and two opposite ends, and two the Two ends 215 ', wherein the anode plate body 214 ' extends between two the second ends 215 ', wherein the anode flow field board 21 ' The anode plate body 214 ' and the second end 215 ' form the company for being formed in the channel side 212 ' of the anode flow field board 21 ' Continuous sealing plane 2120 '.In other words, when the fuel cell pack is stacked, the cathode flow field plate 21 of the flow field board group 20 The planar side 211 and the anode flow field board 21 ' the channel side 212 ' can be respectively the membrane electrode assembly 10 provide one it is flat Support, and make the planar side 211 of the cathode flow field plate 21 and the channel side 212 ' of the anode flow field board 21 ' can seal Ground is pressed on the membrane electrode assembly 10.

Such as Figure 1A, Figure 1B and Fig. 4 of attached drawing, which further comprises a gasket 22, the wherein sealing Pad 22 is arranged on the membrane electrode assembly 10 and the anode flow field board 21 ', and wherein the gasket 22 is arranged on the anode flow field board 21 ' the channel side 212 '.

Such as Fig. 2A to Fig. 4 of attached drawing, when the fuel cell is stacked, each adjacent two fuel cell is mutually assembled in Together, and the cathode of the planar side 211 ' of the anode flow field board 21 ' of previous fuel cell and next fuel cell 212 phase of channel side of flow-field plate 21 couples, wherein the planar side 211 ' of the anode flow field board 21 ' of previous fuel cell Two fluid courses being located between the two are formed with the channel side 212 of the cathode flow field plate 21 of next fuel cell 2150, wherein the fluid course 2150 is connected with the fuel channel 213 ' respectively, to allow the fuel to from a fluid course 2150 flow to another fluid course 2150 by the fuel channel 213 '.

Such as Fig. 2A to Fig. 4 of attached drawing, each fluid course 2150 is opened with one first opening 21501 ' and one second Mouthfuls 21502 ', wherein first opening 21501 ' and second opening 21502 ' be both formed in the anode flow field board 21 ' this Two ends 215 ', wherein the gasket 2150 is arranged on the channel side 212 ' of the anode flow field board 21 ' and around the fluid First opening 21501 ' and second opening 21502 ' of runner 2150, to prevent fuel from the membrane electrode assembly 10 and the anode Air gap leakage between the channel side 212 ' of flow-field plate 21 '.Such as Fig. 2A to Fig. 4 of attached drawing, each fuel channel 213 ' is respectively It is connected with two fluid courses 2150, to allow fuel flow from a fluid course 2150 by the fuel channel 213 ' To another fluid course 2150.Correspondingly, first opening 21501 ' and second opening of the fluid course 2150 21502 ' be penetrating type hole and being set for two two the second ends 215 ' for being respectively formed at the anode flow field board 21 ' respectively It is mutually aligned.Especially, each fuel channel 213 be arranged between the second end 215 ' of the anode flow field board 21 ' and With a serpentine configuration, flow through distance with extend fuel, wherein the both ends of each fuel channel 213 ' respectively with this second Opening 21502 ' is connected, as shown in Fig. 3 B of attached drawing.In other words, fuel is guided through the fuel channel 213 ' flowing and exists Between second opening 21502 ' of two of the second end 215 ' of the anode flow field board 21 '.Optionally, fuel channel 213 ' Other suitable shapes can also be provided having.

Such as Fig. 2A to Fig. 4 of attached drawing, each fluid course 2150 is formed in the channel side 212 of the cathode flow field plate 21, Wherein each first end 215 of the cathode flow field plate 21 is further set with one around the close of the fluid course 2150 Sealing groove 21502.Correspondingly, the seal groove 21502 be the groove of a channel side 212 for being formed in the cathode flow field plate 21 with Around the fluid channel 2150.The flow field board group 20 further comprises two sealing rings 23, and wherein the sealing ring 23 is set respectively It sets in the seal groove 21502 to prevent the fuel planar side 211 ' and the cathode flow field plate 21 from the anode flow field board 21 ' Air gap leakage between the channel side 212.

Such as Fig. 2A to Fig. 4 of attached drawing, each fluid course 2150 further has one and is formed in the cathode flow field plate 21 The first end 215 third opening 21501, wherein the third opening 2501 pass through the cathode flow field plate 21.It is worth noting , when one group of fuel cell is stacked on top of one another together to form a fuel cell pack, which is somebody's turn to do This of the second end 215 ' of the third opening 21501 and corresponding anode flow field board 21 ' of first end 215 second is opened Mouth 21502 ' forms a fuel flow channels 200, so that hydrogen fuel can pass through 200 quilt of fuel flow channel of the fuel cell pack It provides.

Optionally, the fluid course 2150 be respectively formed at the anode flow field board 21 ' the planar side 211 ' and two it is close Sealing groove 21502 is set respectively around the fluid course 2150, and wherein the flow field board group 20 further comprises two sealing rings 23, Wherein the sealing ring 23 is separately positioned on the seal groove 21502 to prevent the planar side of fuel from the anode flow field board 21 ' Air gap leakage between 211 ' and the channel side 212 of the cathode flow field plate 21.

As shown in Fig. 3 B of attached drawing, according to the sealing of the battery unit of the fuel cell pack of present pre-ferred embodiments Pad 22 is a hollow structure to realize that hermetic unit is located at the periphery of the channel side 212 ' of the anode flow field board 21 '.In other words, The gasket 22 is a hollow structure to realize fluid, such as gas, is passed therethrough.The gasket 22 is further set and the sun The size and shape that the channel side 212 ' of pole flow-field plate 21 ' matches.As shown in Figure 3B, the hermetic unit difference of the gasket 22 It is arranged on the second end 215 ' and the anode plate body 214 ' of the anode flow field board 21 ', is used with forming a closed environment It is flowed in hydrogen.It is understood that the fuel channel 213 ' is not covered by the gasket 22.

Fig. 3 B of attached drawing also shows the fuel cell stack design of the preferred embodiment for the present invention, i.e., no matter close using which kind of Envelope mode, such as adhesiveness pad, then the adhesiveness pad is in squeezed state.It is noted that due to the membrane electrode assembly 10 with It is sealed between the planar side 211,212 ' of yin-yang the two poles of the earth flow-field plate 21,21 ' by the gasket 22, forms a closed loop Border is flowed for hydrogen, so that the channel side 212 ' of the anode flow field board 21 ' is sealed and to prevent hydrogen from leaking.Correspondingly, The gasket 22 of the invention can be a ring side washer or adhesiveness washer.The gasket 22 is preferably to be fabricated from a flexible material Gasket structure is arranged on the channel side 212 ' of the anode flow field board 21 ', and when preventing battery pile from working, hydrogen occurs Air infiltration leakage.Therefore, which only needs a gasket 22 that the planar side 211 and sun of its cathode flow field plate 21 can be realized Sealing between the channel side 212 ' of pole flow-field plate 21 '.

When the flow-field plate (cathode flow field plate 21) 21 as fuel cell cathode flow field plate in use, the cathode flow field plate 21 planar side 211 is mounted to the membrane electrode assembly 10.The proton exchange membrane fuel cell is configured to open into atmosphere, because This, oxidant, as air (or oxygen) is blown into the fluid channel 213 by the cathode flow field plate 21.The cooling duct 217 Construction improves air cooling efficiency, because heat is dissipated and is separated by the cooling duct 217.The cooling duct 217 increases Strong heat dissipation effect and the cathode flow field plate 21 can be made thinner compared to traditional.More thin and light fuel cell pack can It is set to have more portability compared to the prior art.

Particularly, which forms from the cathode flow field plate 21 to reduce film water content to rotation speed of the fan Susceptibility.The relatively each fluid channel 213 in the cooling duct 217 forms.When gas passes through the cooling of the cathode flow field plate 21 When channel 217 and the fluid channel 213, air-flow only will take away heat from the cathode flow field plate 21 by the cooling duct 217.It should Cooling duct 217 and the fluid channel 213 will keep the water content of the membrane electrode assembly 10, because passing through the cooling duct 217 Radiating airflow does not contact directly with the membrane electrode assembly 10.Therefore, when rotation speed of the fan is speeded or is slowed down, only fraction is straight Connecing influences 10 water content of membrane electrode assembly, but all air-flows have cooling effect.In other words, the cell voltage phase of the fuel cell More low sensitivity is become to rotation speed of the fan.

In addition, the cathode flow field plate 21 provided by the invention can equally provide the heat and water management of fuel cell.Correspondingly, The membrane electrode assembly 10 needs water content higher to maintain low internal resistance.When gas is blown into and passes through the fluid channel 213, only through being somebody's turn to do Cooling duct 217 is cooling, which does not accelerate water evaporation, to prevent 10 water content of membrane electrode assembly reduction.

It is noted that the free flow field plate group 20 according to present pre-ferred embodiments can make the difference between fuel cell pack It is different smaller.In other words, using between the fuel cell of flow field board group 20 of the present invention have homogeneity.Therefore, the present invention provides Fuel cell pack be easier to realize the homogeneity of cell voltage because higher hydrogen pressure can be used.

Fig. 7 A to Fig. 7 C of attached drawing illustrates the flow field board group 20 of the fuel cell pack according to present pre-ferred embodiments The cathode flow field plate 21 a kind of optional implementation, wherein flow field board group 20A include a cathode flow field plate 21A and a sun Pole flow-field plate 21 ', wherein cathode flow field plate 21A has an a planar side 211A and channel side 212A, and including one Cathode plate body 214A and two opposite ends, two first end 215A, wherein cathode plate body 214A extend in this first Between the 215A of end, wherein the cathode plate body 214A includes two transverse edge 2141A and one group of guidance wall 216A, and wherein this draws It leads wall 216A to be spaced apart respectively between transverse edge 2141A, wherein every two adjacent 216A forms one Positioned at fluid channel 213A and each guidance wall 216A one cooling duct 217A of formation between the two, wherein the cooling is logical Road 217A is formed in the channel side 212A of the cathode flow field plate 21, wherein each cooling duct 217A is from the cathode plate body A transverse edge 2141A of 214A extends to another transverse edge 2141A, enables fluid to flow through the cooling duct 217A.Preferably, each first end 215A of cathode plate body 21A forms a fluid course 2150A, and wherein the fluid is logical Road 2150A has 21501A and seal groove 21502A of a third opening.

Fig. 8 A to Fig. 8 F of attached drawing illustrates the flow field board group 20 of the fuel cell pack according to present pre-ferred embodiments The optional implementation of another kind, wherein flow field board group 20C includes at least two flow-field plate 21C, wherein each flow-field plate 21C includes One cathode plate body 211C, an anode plate body 212C and one group of guidance wall 213C, wherein the cathode plate body 211C forms one group First fluid slot 2110C spaced apart from each other, wherein the guidance wall 213C is spaced apart in the cathode plate body 211C and is somebody's turn to do Between anode plate body 212C, so that each adjacent two guidance wall 213C forms the second fluid slot being located between the two 2130C, wherein the first fluid slot 2110C of cathode plate body 211C is set opposite with the second fluid slot 2130C respectively It is neat and be connected, it is continuously flowed so that each first fluid slot 2110C forms one with corresponding second fluid slot 2130C Body channel 214C, wherein fluid channel 214C has a first passage opening 2141C, a second channel opening 2142C With a third channel opening 2143C, wherein the third channel opening 2143C of fluid channel 214C is set towards the film Electrode group 10, so that fluid channel 214C allows reactive substance fluid, such as the flowing of air, oxygen in the fluid Between the first passage opening 2141C and second channel opening 2142C of channel 214C, and it is open by the third channel 2143C is provided to the membrane electrode assembly 10.Preferably, the length of first fluid slot 2110C is greater than second fluid slot 2130C Length and first fluid slot 2110C width be less than second fluid slot 2130C width.

As shown in Fig. 8 A to Fig. 8 F of attached drawing, each flow-field plate 21C has a first passage side 215C and one second Channel side 216C, wherein the first passage side 215C of cathode plate body 211C is formed in outside one of cathode plate body 211C Side, the second channel side 216C of anode plate body 212C are formed in an outside of anode plate body 212C, wherein the flow field There is plate 21C at least one to be arranged on fuel channel 217C and flow field of the second channel side 216C of flow-field plate 21C The second channel side 216C of plate 21C is set towards the membrane electrode assembly 10, so that fuel, such as hydrogen, can pass through the combustion Material channel 217C is provided to the membrane electrode assembly 10.In other words, the first fluid slot 2110C of cathode plate body 211C is formed On the outside of this of cathode plate body 211C, the fuel channel 217C of anode plate body 212C is formed in anode plate body 212C's The outside.

As shown in Fig. 8 A of attached drawing, the flow field board group 20C according to the fuel cell of present pre-ferred embodiments includes extremely Few two flow-field plate 21C, wherein each membrane electrode assembly 10 is arranged on the previous flow-field plate 21C's in two neighboring flow-field plate Between the first passage side 215C of the second channel side 216C and the latter flow-field plate 21C.In other words, two neighboring flow field The second channel side 216C of previous flow-field plate 21C in plate, the first passage side 215C of the latter flow-field plate 21C and should Membrane electrode assembly 10 forms a battery unit.

As shown in Fig. 8 B to Fig. 8 F of attached drawing, the guidance wall 213C of each flow-field plate 21C of flow field board group 20C is set It sets in an inside of anode plate body 212C, and extends from the inside of anode plate body 212C.Preferably, the flow-field plate Guidance wall 213C and the anode plate body 212C of 21C is integrally formed.It is highly preferred that the flow-field plate 21C of flow field board group 20C Cathode plate body 211C be removably disposed in guidance wall 213C.

As shown in Fig. 8 A to Fig. 8 F of attached drawing, the cathode plate body 211C of the flow-field plate 21C of flow field board group 20C has One is formed in the holding tank 218C of one of cathode plate body 211C inside, wherein the shapes and sizes of holding tank 218C according to The guidance wall 213C of flow-field plate 21C is set, the guidance wall 213C of flow-field plate 21C can be accommodated in the inner, And second fluid slot 2130C first fluid slot with cathode plate body 211C respectively for forming the guidance wall 213C 2110C aligns and is connected, to form fluid channel 214C.It is highly preferred that the depth of holding tank 218C and the stream The height of the guidance wall 213C of field plate 21C is identical, so that the guidance wall 213C of flow-field plate 21C can be adapted Ground is contained in the holding tank 218C of cathode plate body 211C.

As shown in Fig. 8 A to Fig. 8 F of attached drawing, the cathode plate body 211C of the flow-field plate 21C of flow field board group 20C includes Two opposite ends, two first end 2111C, two the first transverse directions each extended between first end 2111C An edge 2112C and first forming portion 2113C being longitudinally extended between first transverse edge 2112C, wherein this One forming portion 2113C forms the first fluid slot 2110C extended between first transverse edge 2112C, wherein the cathode plate The first passage side 215C shape of the first end 2111C of body 211C and the first transverse edge 2112C in flow-field plate 21C At a continuous sealing plane 2150C, wherein continuous sealing plane 2150C be set around cathode plate body 211C this One forming portion 2113C；The anode plate body 212C of flow-field plate 21C includes two opposite ends, two the second ends 2121C, two the second transverse edge 2122C each extended between the second end 2121C and one are longitudinally extended The second forming portion 2123C between second transverse edge 2122C, wherein the second forming portion 2123C formation extend in this Fuel channel 217C between two end 2121C, wherein the second end 2121C of anode plate body 212C and this second laterally Edge 2122C forms a continuous sealing plane 2160C in the second channel side 216C of flow-field plate 21C, and wherein this is continuous Second forming portion 2123C around anode plate body 212C is set in sealing plane 2160C, so that working as the fuel cell When heap is stacked, first passage side 215C and second channel side 216C of flow-field plate 21C can be respectively the membrane electrode Group 10 provides a flat support, and enables first passage side 215C and second channel side 216C of flow-field plate 21C Hermetically it is pressed on the membrane electrode assembly 10.

It is understood that positioned at the cathode plate body 211C of flow-field plate 21C the first fluid slot 2110C and this Two fluid slot 2130C be connected with formed a complete penetration type fluid channel 214C (or slot) this structure can make this second While fluid slot 2130C realizes the heat sinking function of fuel cell pack of the present invention, play by external reaction active fluid guide to The effect of first fluid slot 2110C.Further, the second fluid slot 2130C of flow-field plate 21C realizes gas supply and heat dissipation Dual function, and the first end 2111C and transverse edge 2112C of cathode plate body 211C and the membrane electrode assembly 10 have There is a bigger contact surface, to make fuel cell pack of the present invention that there is better heat dissipation effect and reduce rotation speed of the fan sensitivity Degree.Correspondingly, with the reduction of the promotion of cooling effect and rotation speed of the fan susceptibility, under equal-wattage output, relative to existing The larger fuel cell for having technology to need to construct, the overall volume and weight of the fuel cell can be lowered.In addition, The construction of present invention fluid channel 214C can reduce the thickness of cathode plate body 211C (or cathode flow field plate).If traditional yin The fluid channel design of pole flow-field plate is 3mm depth, then traditional cathode flow field plate needs at least 4mm thickness, to keep cathode stream The mechanical strength of field plate and ensure radiating efficiency.And if it is cathode plate body 211C of the present invention, then when its fluid channel 214C quilt When being set as 3mm depth, the thickness of cathode plate body 211C then can be configured to be less than 4mm.In other words, the second fluid slot 2130C can be used as the configuration of a part of fluid channel 214C, so that the thickness of cathode plate body 211C can be lowered.Also To say, when realizing identical heat dissipation area, cathode plate body 211C of the invention can more traditional cathode flow field plate it is thinner；Because When fluid passes through fluid channel 214C, second fluid slot 2130C of the invention can be by the whole of cathode plate body 211C A cross section is used as heat dissipation.Therefore, under more traditional template same thickness, cathode plate body 211C of the invention is capable of providing more More heat dissipation regions for heat dissipation.

As shown in Fig. 8 A to Fig. 8 F of attached drawing, the cathode plate body 211C's of the flow-field plate 21C of flow field board group 20C is every A first end 2111C has each the second end 2121C tool of one first connection opening 21110C, anode plate body 212C There is one second connection opening 21210C, wherein the first connection opening of the first end 2111C of cathode plate body 211C 21110C is connected with the second connection opening 21210C of the second end 2121C of corresponding anode plate body 212C respectively It is logical and form a fuel flow channel 200C, wherein the both ends of each fuel channel 217C of flow-field plate 21C respectively with the fuel Runner 200C is connected, so that hydrogen fuel can pass through the flow-field plate 21C's of the flow field board group 20C of the fuel cell pack Fuel flow channel 200C is provided.

As shown in Fig. 8 A to Fig. 8 F of attached drawing, the sealing between the two neighboring flow-field plate 21C of flow field board group 20C can lead to It crosses a gasket 22C and is implemented, wherein gasket 22C is a hollow structure, and the hermetic unit quilt of gasket 22C Periphery on the outside of this of the anode plate body 212C of previous flow-field plate 21C is set.In other words, gasket 22C is in one Hollow structure is passed therethrough with realizing fluid, such as gas.Gasket 22C be further set with anode plate body 212C should The size and shape that outside matches.As shown in Fig. 8 A to Fig. 8 F, gasket 22C is respectively set at two adjacent flow field plates The outside of the anode plate body 212C of the previous flow-field plate 21C of 21C, wherein gasket 22C is a hollow structure, and should The hermetic unit of gasket 22C is arranged on anode plate body 212C's and the latter flow-field plate 21C of previous flow-field plate 21C Between cathode plate body 211C and the periphery of the membrane electrode assembly 10 is arranged on the hermetic unit and previous stream of gasket 22C Between the anode plate body 212C of field plate 21C, so that anode plate body 212C, the latter stream of previous flow-field plate 21C The cathode plate body 211C of field plate 21C and the membrane electrode assembly 10 form a sealing space, to be used for fuel flowing.Further Ground, the both ends of gasket 22C are separately positioned on the end of the anode plate body 212C of previous flow-field plate 21C and corresponding The latter flow-field plate 21C cathode flow field plate 211C the end between, wherein gasket 22C is set surrounds respectively The two first connection opening 21110C's and the latter flow-field plate 21C of the anode plate body 212C of previous flow-field plate 21C should The two second connections opening 21210C of cathode flow field plate 211C, so that when the fuel cell is assembled and the gasket When 22C is compressed between two flow-field plate 21C, the anode plate body 212C and the latter flow-field plate of previous flow-field plate 21C The cathode plate body 211C of 21C is hermetically stacked together, to prevent fuel from the anode of previous flow-field plate 21C Air gap leakage between the cathode plate body 211C of plate body 211C and the latter flow-field plate 21C.It is understood that the fuel is logical Road 217C is not covered by gasket 22C.Preferably, gasket 22C is further provided within the two of cathode plate body 211C A end and fuel channel 217C around anode plate body 212C, to form a sealing space for hydrogen flowing.Change sentence It talks about, fuel channel 217C is not covered by gasket 22C.

As shown in Fig. 8 B of attached drawing, the first end of the cathode plate body 211C of the flow-field plate 21C of flow field board group 20C Portion 2111C respectively and is sealingly disposed in the second end 2121C of anode plate body 212C, to prevent hydrogen fuel from passing through The first end 2111C of the cathode plate body 211C of the flow-field plate 21C of flow field board group 20C and the corresponding anode plate body Air gap leakage between the second end 2121C of 212C.Therefore, cathode plate of the flow-field plate 21C of flow field board group 20C The second end 2121C of the first end 2111C of body 211C and corresponding anode plate body 212C are by hermetically phase mutual coupling Be connected together, with prevent cathode plate body 211C first end 2111C and corresponding anode plate body 212C this second End 2121C forms the formation for being located at the gap being connected with fuel flow channel 200C between the two.Flow-field plate 21C's should It is close between the first end 2111C of cathode plate body 211C and the second end 2121C of corresponding anode plate body 212C The first connection opening 21110C of the first end 2111C around cathode plate body 211C can be set in envelope by one (or around corresponding anode plate body 212C the second end 2121C the second connection opening 21210C) sealing ring or Gasket 23C and be implemented.In further embodiments, the first end 2111C of cathode plate body 211C is somebody's turn to do with corresponding Sealing between the second end 2121C of anode plate body 212C passes through the first end 2111C of cathode plate body 211C It is implemented together with being fitted closely with the second end 2121C of corresponding anode plate body 212C.In other embodiments, Between the first end 2111C of cathode plate body 211C and the second end 2121C of corresponding anode plate body 212C Sealing is by using glue or adhesive by the first end 2111C of cathode plate body 211C and the corresponding anode plate body The second end 2121C of 212C is adhered to each other and is implemented.

Fig. 9 A to Fig. 9 F of attached drawing illustrates the flow field board group 20D according to the fuel cell pack of present pre-ferred embodiments The optional implementation of another kind, wherein flow field board group 20D includes at least two flow-field plate 21D, wherein each flow-field plate 21D includes One flow field plate body 211D, one group of first guidance wall 212D and one group of second guidance wall 213D, wherein flow field plate body 211D has There are a cathode side 2111D and an anode-side 2112D, wherein there is flow field plate body 211D at least one to be arranged on the sun The fuel channel 215D of pole side 2112D, wherein first guidance wall 212D is spaced apart flow field plate body 211D's Cathode side 2111D, second guidance wall 213D extends from first guidance wall 212D respectively, so that each adjacent two the One guidance wall 212D forms the first fluid channel 216D being located between the two, and corresponding two neighboring second guidance wall 213D forms the second fluid channel 217D being located between the two, wherein the first fluid channel 216D and the second fluid Channel 217D is connected, wherein there are two first passage opening 2161D, each second fluids for each first fluid channel 216D tool Channel 217D has a second channel opening 2171D, wherein the second channel opening 2171D of second fluid channel 217D It is set towards previous membrane electrode assembly 10, so that the first fluid channel 216D allows reactive substance, such as air Or oxygen etc. can flow in the first fluid channel 216D and reactive substance is enable to pass through the second fluid channel The second channel opening 2171D of 217D is provided to the membrane electrode assembly 10；Wherein fuel channel of flow field plate body 211D 215D is set towards the latter membrane electrode assembly 10, so that hydrogen fuel can be provided to this by fuel channel 215D Membrane electrode assembly 10.

It is understood that the first fluid channel 216D allows the fluids such as air or oxygen to be open from a first passage 2161D flows to another first passage opening 2161D, and therefore, which provides in the mutually membrane electrode assembly 10 While reactive substance, also there is cooling effect.Preferably, the length of first fluid channel 216D is greater than the second The width of the length of body channel 217D and first fluid channel 216D are less than the width of second fluid channel 217D.

As shown in Fig. 9 A of attached drawing, flow field board group 20D includes at least two flow-field plate 21D, wherein the fuel cell pack Each membrane electrode assembly 10 of cell of fuel cell be arranged between the two neighboring flow-field plate 21D of flow field board group 20D, In two neighboring flow-field plate 21D previous flow-field plate 21D the second fluid channel 217D and the latter flow-field plate 21D should Fuel channel 215D is set individually towards the membrane electrode assembly 10, so that reactive substance, such as air and fuel, such as Hydrogen can be provided to the membrane electrode assembly 10 by the second fluid channel 217D and fuel channel 215D respectively.

As shown in Fig. 9 A to Fig. 9 F of attached drawing, each flow-field plate 21D of flow field board group 20D further comprises a support Plate 214D, wherein support plate 214D is arranged on first guidance wall 212D, and wherein support plate 214D forms a receiving Slot 2140D, and when support plate 214D is arranged on first guidance wall 212D, the second guidance wall of flow-field plate 21D 213D is accommodated in the holding tank 2140D of support plate 214D.In other words, the second guidance wall of flow-field plate 21D The height of 213D no more than support plate 214D holding tank 2140D depth so that flow-field plate 21D this second Guidance wall 213D is accommodated in the holding tank 2140D of support plate 214D.Preferably, flow field of flow field board group 20D The length of first guidance wall 212D of plate 21D is greater than the length of second guidance wall 213D, so that support plate 214D First guidance wall 212D can be arranged on.It is highly preferred that the second guidance wall 213D is from first guidance wall 212D Between partially extend, thus make two the first transverse edge 2142D of support plate 214D can be arranged on this first guidance wall The top of 212D.Most preferably, support plate 214D is removably disposed in first guidance wall 212D.

It is worth noting that, according to the flow field board group 20D of the fuel cell pack of present pre-ferred embodiments this be optional The support plate 214D implemented plays assembly supporting role in fuel cell pack of the present invention.In other words, flow field board group 20D The support plate 214D of flow-field plate 21D can not be related to providing reactive substance or fuel to membrane electrode assembly 10.Therefore, should The support plate 214D of the flow-field plate 21D of flow field board group 20D can be made of nonconducting rigid material.That is, the stream The support plate 214D of the flow-field plate 21D of field plate group 20D can be by having high-intensitive and low weight material to be made, to reduce the combustion Expect the weight--to-power ratio of battery pile.

As shown in Fig. 9 A to Fig. 9 F of attached drawing, the support plate 214D of the flow-field plate 21D of flow field board group 20D has one A outside and an inside, wherein the outside of support plate 214D is set towards the membrane electrode assembly 10 and forms one continuously The anode-side 2112D of the flow field plate body 211D of sealing plane 210D, the flow-field plate 21D of flow field board group 20D form one A continuous sealing plane 21120D, wherein the continuous sealing plane 21120D of the anode-side 2112D of flow field plate body 211D It is set around fuel channel 215D, so that when the fuel cell pack is stacked, the support plate of flow-field plate 21D The outside of 214D and anode-side 2112D can be respectively that the membrane electrode assembly 10 provides a flat support, and makes the support The anode-side 2112D of the outside of plate 214D and flow field plate body 211D can hermetically be pressed on the membrane electrode assembly respectively 10。

As shown in Fig. 9 A to Fig. 9 F of attached drawing, the support plate 214D of the flow-field plate 21D of flow field board group 20D includes two A opposite end, two first end 2141D and two the first widthwise edges each extended between first end 2141D Edge 2142D, wherein the first end 2141D of support plate 214D and first transverse edge 2142D form the holding tank 2140D and continuous sealing plane 210D；The flow field plate body 211D of flow-field plate 21D includes two opposite ends, and two The second end 2113D, two the second transverse edge 2114D each extended between the second end 2113D and a longitudinal direction Ground extends in the forming portion 2115D between second transverse edge 2114D, wherein forming portion 2115D formation extend in this Fuel channel 215D between two end 2113D, wherein the second end 2113D of flow field plate body 211D and this second laterally Edge 2114D forms continuous sealing plane 21120D in the anode-side 2112D of flow-field plate 21D, wherein the continuous sealing The forming portion 2115D around anode plate body 212D is set in plane 21120D, so that when the fuel cell pack is dumped When folded, the outside of the support plate 214D of flow-field plate 21D and anode-side 2112D can be respectively that the membrane electrode assembly 10 mentions For a flat support, and the outside of support plate 214D and anode-side 2112D is enable hermetically to be pressed on this respectively Membrane electrode assembly 10.

It is understood that the first fluid channel 216D of flow-field plate 21D is connected with second fluid channel 217D Pass to be formed a complete penetration type channel (or slot) this structure can make the first fluid channel 216D realize the present invention combustion While expecting the heat sinking function of battery pile, plays and guide external reaction active fluid to the work of second fluid channel 217D With.Further, the first fluid channel 216D of flow-field plate 21D realizes the dual function of gas supply and heat dissipation, and the support The first end 2141D of plate 214D and the first transverse edge 2142D has a bigger contact with the membrane electrode assembly 10 Face, so that fuel cell pack of the present invention has preferably heat dissipation when support plate 214D is made for good thermal conductive material Effect and reduction rotation speed of the fan susceptibility.Correspondingly, with the reduction of the promotion of cooling effect and rotation speed of the fan susceptibility, in phase With the larger fuel cell under power output, needing to construct compared with the existing technology, the overall volume of the fuel cell and Weight can be lowered.

As shown in Fig. 9 A to Fig. 9 F of attached drawing, the support plate 214D of the flow-field plate 21D of flow field board group 20D includes two The flow field plate body 211D of a first end 2141D and flow-field plate 21D includes two opposite ends, two the second ends 2113D, wherein each first end 2141D of the support plate 214D of the flow-field plate 21D of flow field board group 20D has one the Each the second end 2113D of one connection opening 21410D, flow field plate body 211D has one second connection opening 21130D, Wherein the first end 2141D of support plate 214D this first connection opening 21410D respectively with the corresponding flow-field plate The second connection opening 21130D of the second end 2113D of body 211D is connected and is formed a fuel flow channel 200D, In the both ends of each fuel channel 215D of flow-field plate 21D be connected respectively with fuel flow channel 200D so that hydrogen fires Material can be provided to the film by the fuel flow channel 200D of the flow-field plate 21D of the flow field board group 20D of the fuel cell pack Electrode group 10.

As shown in Fig. 9 A to Fig. 9 F of attached drawing, the sealing between the two neighboring flow-field plate 21D of flow field board group 20D can lead to It crosses a gasket 22D and is implemented, wherein gasket 22D is a hollow structure, and the hermetic unit quilt of gasket 22D A periphery of the anode-side 2112D of the flow field plate body 211D of previous flow-field plate 21D is set.In other words, the sealing Padding 22D is a hollow structure to realize fluid, such as gas, is passed therethrough.Gasket 22D is further set and the flow-field plate The size and shape that the anode-side 2112D of body 211D matches.As shown in Fig. 9 A to Fig. 9 F, gasket 22D is one hollow Structure, and the hermetic unit of gasket 22D is arranged on being somebody's turn to do for the previous flow-field plate 21D in two adjacent flow field plates 21D Between the support plate 214D of the anode-side 2112D and the latter flow-field plate 21D of flow field plate body 211D, the wherein membrane electrode assembly 10 periphery is arranged on the hermetic unit of gasket 22D and the flow field plate body 211D's of previous flow-field plate 21D Between anode-side 2112D, so that the flow field plate body 211D of previous flow-field plate 21D, the latter flow-field plate 21D's should Support plate 214D and the membrane electrode assembly 10 form a sealing space, to be used for fuel flowing.Further, gasket 22D Both ends be separately positioned on previous flow-field plate 21D flow field plate body 211D the end and corresponding the latter flow-field plate Between the end of the support plate 214D of 21D, wherein gasket 22D is set respectively around previous flow-field plate 21D's Two of the support plate 214D of the second connection opening of two of flow field plate body 211D 21130D and the latter flow-field plate 21D First connection opening 21410D so that when the fuel cell is assembled and gasket 22D be compressed in two it is adjacent When between flow-field plate 21D, the support plate of the flow field plate body 211D and the latter flow-field plate 21D of previous flow-field plate 21D 214D is hermetically stacked together, to prevent fuel from the flow field plate body 211D of previous flow-field plate 21D and latter Air gap leakage between the flow field plate body 211D of a flow-field plate 21D.It is understood that fuel channel 215D is not close by this Packing 22D is covered.Preferably, gasket 22D is further provided within two ends of support plate 214D and around the stream The fuel channel 215D of field plate body 211D is flowed with forming a sealing space for hydrogen.In other words, the fuel channel 215D is not covered by gasket 22D.

As shown in Fig. 9 B of attached drawing, the first end of the support plate 214D of the flow-field plate 21D of flow field board group 20D 2141D respectively and is sealingly disposed in the second end 2113D of flow field plate body 211D, to prevent hydrogen fuel by should The first end 2141D of the support plate 214D of the flow-field plate 21D of flow field board group 20D and corresponding flow field plate body 211D The second end 2113D between air gap leakage.Therefore, the support plate 214D of the flow-field plate 21D of flow field board group 20D First end 2141D and the second end 2113D of corresponding flow field plate body 211D be hermetically mutually coupled one It rises, to prevent the second end 2113D of the first end 2141D and corresponding flow field plate body 211D of support plate 214D Form the formation for being located at the gap being connected with fuel flow channel 200D between the two.

It is worth noting that, the first end 2141D of the support plate 214D of flow-field plate 21D and the corresponding flow field The first end around support plate 214D can be set by one in sealing between the second end 2113D of plate body 211D Portion 2141D the first connection opening 21410D (or around corresponding flow field plate body 211D the second end 2113D should Second connection opening 21130D) sealing ring or sealing ring 23D and be implemented.In further embodiments, flow-field plate 21D It is close between the first end 2141D of support plate 214D and the second end 2113D of corresponding flow field plate body 211D Envelope passes through the second end 2113D of the first end 2141D of support plate 214D and corresponding flow field plate body 211D It fits closely together and is implemented.In other embodiments, the first end 2141D of support plate 214D is somebody's turn to do with corresponding Sealing between the second end 2113D of flow field plate body 211D by using glue or adhesive by support plate 214D should The second end 2113D of first end 2141D and corresponding flow field plate body 211D are adhered to each other and are implemented.

It is understood that the fuel cell according to present pre-ferred embodiments the anode flow field board (anode plate body or Flow field plate body) and the cathode flow field plate (cathode plate body or flow field plate body) used in material be generally conductive metal.The metal With firm, light and conductive characteristic, but the material is not limited to metal.Containing graphite, carbon black, carbon fiber and/or receive The materials such as the conductive composite material of rice carbon etc., or the electrically conductive graphite, carbon black, carbon fiber and/or the nano-sized carbon that are even strengthened, It is used equally for structure of the invention.

It will be understood by those skilled in the art that in exposure of the invention, term " longitudinal direction ", " transverse direction ", "upper", The orientation of the instructions such as "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" or position are closed System is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, without referring to Show or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore above-mentioned art Language is not considered as limiting the invention.

It is understood that term " one " is interpreted as " at least one " or " one or more ", i.e., in one embodiment, The quantity of one element can be one, and in a further embodiment, the quantity of the element can be it is multiple, term " one " is no It should be understood the limitation to quantity.

It is to this hair that those skilled in the art, which would appreciate that the embodiment of the present invention shown in the drawings and described above only, Bright example rather than limit.

It can thus be seen that the object of the invention can be efficiently accomplished sufficiently.It is used to explain the present invention function and structure principle The embodiment is absolutely proved and is described, and the present invention is not limited by based on the change on these embodiment basis. Therefore, the present invention includes all modifications covered within appended claims claimed range and spirit.

Claims

1. a kind of flow field board group for fuel cell, wherein the fuel cell has at least one membrane electrode assembly, and feature exists In, including at least two flow-field plates, wherein the membrane electrode assembly of the fuel cell is separately positioned on two neighboring flow-field plate Between, wherein each flow-field plate includes a cathode plate body, an anode plate body and one group of guidance wall, wherein the cathode plate body One group of first fluid slot spaced apart from each other is formed, wherein the guidance wall is spaced apart in the cathode plate body and described Between anode plate body, so that each adjacent two guidance wall forms one and is located at second fluid slot between the two, wherein institute The first fluid slot for stating cathode plate body is set to be connected with the second fluid slot respectively, so that each first-class Body slot forms at least one continuous fluid channel with corresponding second fluid slot, wherein the fluid channel has one first Access portal, a second channel opening and a third channel opening, wherein the anode plate body of the flow-field plate has At least one is arranged on the fuel channel in an outside of the anode plate body, and wherein each adjacent two flow-field plate is previous The outside of the anode plate body of flow-field plate, which is set towards the fuel cell, is arranged on two neighboring flow-field plate Between the membrane electrode assembly, to allow the fuel to be provided to the membrane electrode assembly, the latter flow field by the fuel channel The third channel opening of the fluid channel of the cathode plate body of plate is set towards the membrane electrode assembly, so that The fluid channel allows fluid flowing to be open it in the first passage opening of the fluid channel and the second channel Between, and be open by the third channel and be provided to the membrane electrode assembly of the fuel cell, wherein the institute of the flow-field plate The holding tank that cathode plate body is formed in an inside of the cathode plate body with one is stated, wherein the yin of each flow-field plate There are two the first connection opening of two ends for being separately positioned on the cathode plate body, the anode plate body tools for pole plate body tool There are two the second connection openings of two ends for being separately positioned on the anode plate body, wherein the cathode plate body is described First connection opening is connected to opening in communication with described the second of the corresponding anode plate body respectively and forms a fuel Runner, wherein the both ends of each fuel channel of the flow-field plate are connected with the fuel flow channel respectively, so that fuel It can be provided to the membrane electrode assembly by the fuel flow channel of the flow-field plate, wherein the cathode plate body of each flow-field plate Two ends respectively and be sealingly disposed in two ends of the anode plate body, to prevent fuel from passing through the flow field Air gap leakage between the end of the cathode plate body of plate and the end of the corresponding anode plate body, wherein often The guidance wall and the anode plate body by integral forming of a flow-field plate and the extension from the inside of one of the anode plate body, wherein The shapes and sizes of the holding tank are set according to the guidance wall of the flow-field plate, with can will be described in the flow-field plate The second fluid slot for guiding wall to accommodate in the inner, and forming the guidance wall respectively with the cathode plate body described the One fluid slot is connected, so that the fluid channel is formed, wherein the holding tank of the cathode plate body of the flow-field plate Depth it is identical as the height of the guidance wall of the flow-field plate so that the guidance wall of the flow-field plate can be by It is contained in the holding tank of the cathode plate body with being adapted.

2. flow field board group according to claim 1, wherein the anode of the previous flow-field plate of two neighboring flow-field plate The outside of plate body forms the continuous sealing plane of a film battery group for sealing the fuel cell, the latter One outside of the cathode plate body of flow-field plate forms the film battery group that another is used to seal the fuel cell Continuous sealing plane, so that the membrane electrode assembly is sealed between two neighboring flow-field plate.

3. flow field board group according to claim 1 further comprises two sealing rings, wherein the sealing ring is set respectively It sets between the end of the anode plate body of the flow-field plate and the end of the corresponding cathode plate body, wherein each sealing Ring is set respectively around the institute of the first connection opening and the anode plate body of the cathode plate body of the flow-field plate The second connection opening is stated, so that two ends of the cathode plate body of the flow-field plate respectively and are sealingly disposed in institute State two ends of anode plate body.