WO2017181533A1

WO2017181533A1 - Pem fuel cell stack, and flow field plate assembly for same

Info

Publication number: WO2017181533A1
Application number: PCT/CN2016/088556
Authority: WO
Inventors: 李骁; 赵锋
Original assignee: 武汉众宇动力系统科技有限公司
Priority date: 2016-04-21
Filing date: 2016-07-05
Publication date: 2017-10-26

Abstract

A cathode flow field plate (21) for use in a fuel cell. The fuel cell has a membrane electrode assembly (10), and the cathode flow field plate (21) is arranged to seal the membrane electrode assembly (10). The cathode flow field plate (21) has a set of fluid channels (213) and a set of cooling channels (217), and the cooling channels (217) are respectively aligned and in communication with the fluid channels (213).

Description

PEM fuel cell stack and its flow field plate set

Technical field

The present invention relates to the field of fuel cell technology, and more particularly to a polymer thin film battery stack for a proton exchange membrane (PEM) fuel cell.

Background technique

A fuel cell is an energy source that converts chemical energy from a fuel into electrical energy through a chemical reaction involving a reactive species, such as oxygen or other oxidant. Hydrogen is the most common fuel in such batteries. Among them, the most representative example of such a fuel cell technology is a proton exchange membrane (PEM) fuel cell. Such a fuel cell includes a membrane electrode assembly (MEA) including a polymer electrolyte membrane sandwiched between two layers of catalyst coated papers respectively as yin and yang grades; the membrane electrode assembly (MEA) is sandwiched between a pair of streams Between field plates, they are related to fuel and oxidant, respectively. The working principle of the fuel cell comprises the steps of: passing hydrogen fuel into an anode flow field plate on one side of the fuel cell, and then passing the oxidant into a cathode flow field plate on the other side of the fuel cell; and a platinum catalyst (or other catalyst) On the anode side, hydrogen is separated into positively charged hydrogen protons and negatively charged hydrogen electrons; the polymer electrolyte membrane can only pass positively charged hydrogen protons into the cathode, while negatively charged hydrogen electrons need to enter the cathode through the channels of the peripherals. At this point, current is generated; on the cathode side, electrons and positively charged protons combine with oxygen to form water, which is the only product discharged from the battery. In addition, since oxygen is blown into the cathode flow field plate, the fuel cell can be cooled. The cathode flow field plate can be exposed to air as an "open cathode structure."

The traditional cathode flow field plate design uses a saw-like or square wave structure, and air can be blown into it by a blower or a fan. Compared to water-cooled cell stacks, air-cooled cell stacks have a more balanced design and easier control strategy that can be activated immediately.

One of the main technical difficulties of air-cooled proton exchange membrane fuel cells using polymer electrolyte membranes is heat and water treatment management. Among them, the polymer electrolyte membrane needs to have a high water content to maintain the inherent low resistance of the film. When the gas stream passes through the flow field plate channel, the cell stack can be cooled, but the evaporation of moisture is also accelerated to cause a decrease in water content in the film. Therefore, the fan speed needs to be carefully controlled (control strategy) based on flow, ambient temperature and relative humidity to achieve equilibrium. Improper fan speed will cause the output power of the stack to drop.

Another limitation of air-cooled proton exchange membrane fuel cells employing polymer electrolyte membranes is hydrogen leakage. In a conventional design, the saw-like cathode flow field plate faces the membrane electrode assembly, which includes a polymer electrolyte membrane and catalyst layers on both sides. Therefore, only the serrations are pressed against the gasket, and other portions of the region are not subjected to the pressure of the serrations and are difficult to be sealed, so as to become potential hydrogen leakage regions. Additionally, the design generally defines a hydrogen working pressure of less than 0.5 bar.g. However, higher hydrogen pressures can promote kinetics, battery uniformity, load change response, and reduced hydrogen starvation (serious damage to fuel power) The durability of the pool), but higher than the design pressure value may cause leakage or gasket burst.

Summary of the invention

A primary object of the present invention is to provide a fuel cell in which a flow field plate set for a proton exchange membrane fuel cell is incorporated to prevent hydrogen leakage.

Another object of the present invention is to provide a flow field plate set that allows for higher fuel cell operating pressures and improved cooling efficiency. This performance increases the power-to-weight ratio and endurance of a fuel cell as a source of high energy density energy.

Another object of the present invention is to provide a flow field plate set in which the inner side of the cathode flow field plate of the flow field plate group and the inner side of the anode flow field plate form two continuous faces facing each other, thereby making the flow field plate A seal between the inner side of the cathode flow field plate and the inner side of the anode flow field plate is achieved by providing only one sealing film between the inner side of the cathode flow field plate and the inner side of the anode flow field plate. Further, the single sealing film of the flow field plate group realizes the sealing between the inner side of the cathode flow field plate and the inner side of the anode flow field plate, so that the assembly difficulty of the flow field plate group is reduced.

Another object of the present invention is to provide a flow field plate set for a proton exchange membrane fuel cell to enable the proton exchange membrane fuel cell to operate at a pressure greater than 0.5 bar.g without hydrogen leakage and thus The operation is safer.

Another object of the present invention is to provide a flow field plate set for a proton exchange membrane fuel cell to enable the proton exchange membrane fuel cell to operate at a pressure greater than 0.5 bar.g, thereby allowing the fuel cell to be compared In conventional fuel cells, the kinetics, battery uniformity, load change response are increased and the probability of hydrogen starvation is reduced.

Another object of the present invention is to provide a flow field plate set for a proton exchange membrane fuel cell to enhance air cooling efficiency, thereby allowing the use of a thinner flow field plate capable of reducing the total weight to power ratio.

Another object of the present invention is to provide a flow field plate set for a proton exchange membrane fuel cell to reduce the sensitivity of the water content of the proton exchange membrane to the fan speed.

Another object of the present invention is to provide a flow field plate set for a proton exchange membrane fuel cell wherein the newly designed flow field plate of the flow field plate set is easier to seal and prevent hydrogen leakage.

Another object of the present invention is to provide a flow field plate set for a proton exchange membrane fuel cell, wherein the newly designed flow field plate can be adapted for assembly in most conventional proton exchange membrane fuel cells.

Another object of the present invention is to provide a flow field plate set for a proton exchange membrane fuel cell wherein the newly designed flow field plate is easy to use, simple in construction, and inexpensive to manufacture.

Other objects and features of the present invention will be realized and at the

In accordance with the present invention, the foregoing and other objects and advantages are realized by an air-cooled proton exchange fuel cell stack.

In accordance with the present invention, the foregoing and other objects and advantages are realized by a fuel cell including a membrane electrode assembly and a first-rate field plate assembly.

The flow field plate set includes a cathode flow field plate and an anode flow field plate, wherein the membrane electrode assembly is sealed between the cathode flow field plate and the anode flow field plate, wherein the cathode flow field plate has a planar side An opposite channel side and a plurality of fluid channels formed on the channel side, wherein the planar side is located outside of the cathode flow field plate toward the outside of the membrane electrode set, wherein the fluid channel is configured to enable fluid along the Fluid channels are directed to the set of membrane electrodes to facilitate electrochemical reaction to generate and generate electrical energy through the membrane electrode, wherein the anode flow field plate has a planar side, an opposite channel side, and at least one fuel passage, wherein the anode flow field The planar side of the plate is located on an inner side of the anode flow field plate, the channel side of the anode flow field plate is located on an outer side of the anode flow field plate and seals the membrane electrode set, wherein each of the anode flow field plates A fuel passage is formed on the passage side of the anode flow field plate, wherein the fuel passage is configured to enable fuel to be supplied to the membrane electrode assembly through the fuel passage.

Accordingly, the present invention further provides a cathode flow field plate for a fuel cell, wherein the fuel cell has a membrane electrode set including a cathode flow field plate, wherein the cathode flow field plate is arranged to seal the membrane electrode The set wherein the cathode flow field plate has a plurality of fluid passages and a set of cooling passages, wherein the cooling passages are respectively in communication with the fluid passages.

Accordingly, the present invention further provides an anode flow field plate for a fuel cell, wherein the fuel cell has a membrane electrode set including an anode flow field plate, wherein the anode flow field plate has a planar side and a channel a side, wherein the planar side is located on an inner side of the anode flow field plate, wherein the channel side is located on an outer side of the anode flow field plate, wherein the channel side of the anode flow field plate is configured to seal the membrane electrode set, Wherein the anode flow field plate further includes at least one fuel passage, wherein the fuel passage is formed toward the passage side of the membrane electrode assembly such that fuel can be supplied to the membrane electrode assembly through the fuel passage.

The present invention still further provides a flow field plate set for a fuel cell, wherein the fuel cell has at least one membrane electrode set including at least two flow field plates, wherein the membrane electrode groups of the fuel cell are respectively disposed at Between two adjacent flow field plates, wherein each flow field plate comprises a cathode plate body, an anode plate body and a set of guide walls, wherein the cathode plate body forms a set of first fluid grooves spaced apart from each other, wherein The guiding wall is spaced apart between the cathode plate body and the anode plate body such that each adjacent two guiding walls form a second fluid groove between the two, wherein the cathode plate body The first fluid grooves are disposed to communicate with the second fluid grooves, respectively, such that each of the first fluid grooves and the corresponding second fluid grooves form at least one continuous fluid passage, wherein the fluid passage has a first passage opening a second passage opening and a third passage opening, wherein the anode plate body of the flow field plate has at least one set a fuel passage on an outer side of the anode plate body, wherein the outer side of the anode plate body of the previous flow field plate of each adjacent two flow field plates is disposed toward the fuel cell and disposed adjacent to the two streams The membrane electrode assembly between the field plates such that fuel can be supplied to the membrane electrode assembly through the fuel passage, the third passage opening of the fluid passage of the cathode plate body of the latter flow field plate being disposed toward the membrane electrode assembly a membrane electrode assembly such that the fluid passage allows fluid to flow between the first passage opening and the second passage opening of the fluid passage and is supplied to the membrane electrode assembly of the fuel cell through the third passage opening

The present invention still further provides a fuel cell comprising at least one membrane electrode assembly and one flow field plate group, wherein the flow field plate group comprises at least two flow field plates, wherein the membrane electrode groups are respectively disposed adjacent to the two Between the flow field plates, wherein each flow field plate comprises a cathode plate body, an anode plate body and a set of guide walls, wherein the cathode plate body forms a set of spaced apart first fluid grooves, wherein the guide wall Separably disposed between the cathode plate body and the anode plate body such that each adjacent two guide walls form a second fluid groove therebetween, wherein the first portion of the cathode plate body The fluid slots are disposed in communication with the second fluid channels, respectively, such that each of the first fluid channels and the respective second fluid grooves form at least one continuous fluid passage, wherein the fluid passage has a first passage opening, a first a two-channel opening and a third passage opening, wherein the anode plate body of the flow field plate has at least one fuel passage disposed on an outer side of the anode plate body, wherein a previous one of the adjacent two flow field plates The outer side of the anode plate body of the flow field plate is disposed toward the membrane electrode group disposed between adjacent two flow field plates, thereby enabling fuel to be supplied to the membrane electrode group through the fuel passage, the latter The third passage opening of the fluid passage of the cathode plate body of the flow field plate is disposed toward the membrane electrode assembly such that the fluid passage allows fluid to flow in the first passage opening and the second passage opening of the fluid passage Between and through the third passage opening is provided to the membrane electrode assembly.

Accordingly, the present invention still further provides a flow field plate set for a fuel cell, wherein the fuel cell has at least one membrane electrode set including at least two flow field plates, wherein the membrane electrode of the fuel cell The groups are respectively disposed between two adjacent flow field plates, wherein each flow field plate includes a cathode plate body, an anode plate body and a set of guide walls, wherein the cathode plate body forms a set of mutually separated first a fluid groove, wherein the guide wall is spaced apart between the cathode plate body and the anode plate body such that each adjacent two guide walls form a second fluid groove between the two, wherein The first fluid grooves of the cathode plate body are disposed to communicate with the second fluid grooves, respectively, such that each of the first fluid grooves and the corresponding second fluid grooves form at least one continuous fluid passage, wherein the fluid passage has a first passage opening, a second passage opening and a third passage opening, wherein the anode plate body of the flow field plate has at least one fuel passage disposed on an outer side of the anode plate body, The outer side of the anode plate body of the preceding flow field plate of each adjacent two flow field plates is disposed toward the membrane electrode group of the fuel cell disposed between adjacent two flow field plates, thereby Fuel can be supplied to the membrane electrode set through the fuel passage, the cathode of the latter flow field plate The third passage opening of the fluid passage of the plate body is disposed toward the membrane electrode assembly such that the fluid passage allows fluid to flow between the first passage opening and the second passage opening of the fluid passage, and passes through the A third passage opening is provided to the membrane electrode set of the fuel cell.

The present invention still further provides a fuel cell comprising at least one membrane electrode set and at least two flow field plates, wherein the membrane electrode sets are respectively disposed between adjacent two flow field plates, wherein each flow field plate The invention comprises a flow field plate body, a set of first guiding walls and a set of second guiding walls, wherein the flow field plate body has a cathode side and an anode side, wherein the flow field plate body has at least one disposed at the anode a side fuel passage, wherein the first guide wall is spaced apart from the cathode side of the flow field plate, the second guide wall respectively extending from the first guide wall, so that two adjacent first The guiding wall forms a first fluid passage between the two, and the corresponding adjacent two second guiding walls form a second fluid passage therebetween, wherein the first fluid passage and the second fluid The channels are in communication, wherein each first fluid channel has two first channel openings, each second fluid channel having a second channel opening, wherein the flow field of a previous flow field plate of two adjacent flow field plates The anode of the plate Provided toward the membrane electrode assembly disposed between adjacent two flow field plates such that fuel can be supplied to the membrane electrode assembly through the fuel passage, and the flow field plate of the latter flow field plate The second passage opening of the second fluid passage is disposed toward the membrane electrode assembly of the fuel cell such that the first fluid passage allows fluid to flow between the first passage opening of the fluid passage and passes through the first The second passage opening of the two fluid passage is provided to the membrane electrode assembly of the fuel cell.

Accordingly, the present invention still further provides a flow field plate set for a fuel cell, wherein the fuel cell has at least one membrane electrode set including at least two flow field plates, wherein the membrane electrode group of the fuel cell is Separately disposed between two adjacent flow field plates, wherein each flow field plate includes a flow field plate body, a set of first guide walls and a set of second guide walls, wherein the flow field plate body has a cathode side And an anode side, wherein the flow field plate body has at least one fuel passage disposed on the anode side, wherein the first guide wall is spaced apart from the cathode side of the flow field plate, the second The guiding walls respectively extend from the first guiding wall such that adjacent two first guiding walls form a first fluid passage between the two, and the corresponding adjacent two second guiding walls form one at both a second fluid passageway, wherein the first fluid passage is in communication with the second fluid passage, wherein each first fluid passage has two first passage openings, and each second fluid passage has a second passage opening , The anode side of the flow field plate of the previous flow field plate of the adjacent two flow field plates is disposed toward the membrane electrode group disposed between the adjacent two flow field plates, thereby enabling fuel to pass The fuel passage is provided to the membrane electrode assembly, and the second passage opening of the second fluid passage of the flow field plate of the latter flow field plate is disposed toward the membrane electrode assembly of the fuel cell such that the The first fluid passage allows fluid to flow between the first passage opening of the fluid passage and is provided to the membrane electrode assembly of the fuel cell through the second passage opening of the second fluid passage.

Further objects and advantages of the present invention will be fully realized from the understanding of the appended claims.

These and other objects, features and advantages of the present invention will become apparent from

DRAWINGS

1A is an assembled view of a flow field plate assembly of a proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention.

1B is another assembled view of a flow field plate set of a proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention described above.

2A is a top plan view of a cathode flow field plate of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention described above.

2B is a bottom plan view of a cathode flow field plate of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention described above.

3A is a top plan view of an anode flow field plate of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention described above.

Figure 3B is a bottom plan view of the anode flow field plate of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention described above.

4 illustrates the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the invention described above, wherein the proton exchange membrane fuel cell stack employs the flow field plate set described above.

Figure 5A illustrates that the cathode flow field plate and the anode flow field plate of the flow field plate set described above are stacked on each other in the proton exchange membrane fuel cell stack according to a preferred embodiment of the present invention.

Figure 5B is a partial cross-sectional view of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention described above.

Figure 5C is a partial enlarged view of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the invention described above.

Figure 6 is a cross-sectional view of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention described above.

Figure 7A illustrates an alternate implementation of the flow field plate set of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the invention described above.

Figure 7B is a partial cross-sectional view of the alternate embodiment of the cathode flow field plate of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention described above.

Figure 7C is a partial enlarged view of the alternative embodiment of the cathode flow field plate of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention described above.

Figure 8A illustrates another alternative implementation of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the invention described above.

Figure 8B is a cross-sectional view of the flow field plate of the alternate embodiment of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention described above.

Figure 8C is a top plan view of the cathode plate of the flow field plate of the alternate embodiment of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention.

Figure 8D is a top plan view of the anode plate body of the flow field plate of the alternate embodiment of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention.

Figure 8E is a bottom plan view of the cathode plate of the flow field plate of the alternate embodiment of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention.

Figure 8F is a bottom plan view of the anode plate body of the flow field plate of the alternate embodiment of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention.

Figure 9A illustrates another alternative implementation of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the invention described above.

Figure 9B is a cross-sectional view of the flow field plate of the alternate embodiment of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention described above.

Figure 9C is a top plan view of the support plate of the flow field plate of the alternate embodiment of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention.

Figure 9D is a top plan view of the flow field plate of the flow field plate of the alternate embodiment of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention.

Figure 9E is a bottom plan view of the support plate of the flow field plate of the alternate embodiment of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention.

Figure 9F is a bottom plan view of the flow field plate of the flow field plate of the alternate embodiment of the flow field plate stack of the proton exchange membrane fuel cell stack in accordance with a preferred embodiment of the present invention.

detailed description

The following description is disclosed to enable any person skilled in the art to make and use the invention. The preferred embodiments provided in the following description are merely exemplary and modifications that are obvious to those skilled in the art, and are not intended to limit the scope of the invention. The general principles defined in the following description may be applied to other embodiments, alternatives, modifications, equivalents and applications without departing from the spirit and scope of the invention.

Referring to Figures 1A through 6 of the drawings, a proton exchange fuel cell stack in accordance with a preferred embodiment of the present invention is illustrated. The proton exchange fuel cell stack includes one or more fuel cell units stacked on each other. According to a preferred embodiment of the invention, each fuel cell unit of the proton exchange fuel cell stack can be formed as a single fuel cell, including A membrane electrode assembly 10 and a flow field plate assembly 20, wherein the flow field plate assembly 20 includes two electrically conductive bipolar plates to sandwich the membrane electrode assembly 10 therebetween.

The membrane electrode assembly 10 includes a polymer electrolyte membrane, and a catalyst coated on both sides of the polymer electrolyte membrane. Two gas diffusion layers are respectively located on both outer sides of the membrane electrode assembly 10 of the membrane electrode assembly, wherein the gas diffusion layer is held between the conductive bipolar plates of the flow field plate group 20 to form a battery cell group.

As shown in FIGS. 1A to 6 of the accompanying drawings, the conductive bipolar plate for sandwiching the flow field plate group 20 between the membrane electrode assembly 10 is an anode flow field plate 21' and a Cathode flow field plate 21. In other words, the flow field plate set 20 includes an anode flow field plate 21' and a cathode flow field plate 21, and the membrane electrode assembly 10 is sealed and sandwiched between the anode flow field plate 21' and the cathode flow field plate. Between 21, wherein the cathode flow field plate 21 has an inner side and an outer side, wherein the inner side of the cathode flow field plate 21 forms a planar side 211, and the outer side 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 disposed toward the membrane electrode assembly 10, wherein the cathode flow field plate 21 further has a plurality of fluid passages 213 formed in the channel side 212, wherein each fluid passage 213 is a penetrating passage extending from the outer side of the cathode flow field plate 21 to the inner side of the cathode flow field plate 21 to enable fluid to flow along the fluid channel 213 to the membrane electrode assembly 10, thereby promoting electrochemical reaction Electrical energy is generated and generated through the membrane electrode assembly 10. In other words, each fluid channel 213 can extend from the planar side 211 of the cathode flow field plate 21 to the channel side 212 of the cathode flow field plate 21 such that fluid can flow along the fluid channel 213 to the membrane electrode set. 10. In particular, the fluid passage 213 is a penetrating passage for guiding fluid from the edge of the cathode flow field plate 21 to the inner side of the cathode flow field plate 21, wherein the inner side of the cathode flow field plate 21 faces the inner side Membrane electrode group 10. Accordingly, the fluid is a reactive gas such as air.

It will be appreciated that the fuel cell stack of a proton exchange membrane fuel cell in actual use comprises a plurality of stacked unit fuel assemblies which may be in the hundreds depending on electrical consumption requirements. Thus, a typical fuel cell stack includes a collection of repeating battery cells. The cathode flow field plate 21 (or the anode flow field plate 21') may be constructed of a lightweight and strong conductive material. The fluid passage 213 extends to the entire length of the side of the cathode flow field plate 21 and extends into the cathode flow field plate 21 at a predetermined depth. The fluid passage 213 also forms a ridge-like ridge from the uncut cathode flow field plate 21, and these ridge-like projections are uniformly and uniformly distributed.

2A and 2B, each fluid passage 213 is an elongated passage such that two passage openings are formed at both edges of the cathode flow field plate 21, respectively. Thus, the fluid will flow from the passage opening to the fluid passage 213 and through the passage side 212 of the cathode flow field plate 21 to the planar side 211 of the cathode flow field plate 21 to reach the membrane electrode assembly 10.

2B and FIG. 6, the cathode flow field plate 21 further has a set of cooling channels 217, wherein the cold However, the passage 217 is respectively aligned with the fluid passage 213 to dissipate the heat of the cathode flow field plate 21 when the fluid flows along the fluid passage 213. Preferably, the cooling passage 217 is a penetrating passage uniformly formed in the cathode flow field plate 21 to be aligned with the fluid passage 213, respectively.

2A to 3B, the cathode flow field plate 21 includes a cathode plate body 214 and two opposite ends, two first ends 215, wherein the cathode plate body 214 extends in two first portions. Between the ends 215, wherein the cathode plate body 214 includes two lateral edges 2141 and a set of guide walls 216, wherein the guide walls 216 extend spaced apart between the two lateral edges 2141, wherein each two adjacent The guiding wall 216 forms the fluid passage 213 and the cooling passage 217 communicating with the fluid passage 213 therebetween, wherein each cooling passage 217 is disposed along the fluid passage 213 to enable the fluid to flow through the Cooling channel 217. Preferably, the first end portion 215 of the cathode flow field plate 21 and the two lateral edges 2141 of the cathode plate body 214 form a continuous sealing plane 2110 of the planar side 211 of the cathode flow field plate 21, thereby When the fuel cell stack is stacked, the planar side 211 of the cathode flow field plate 21 can provide a flat support for the membrane electrode assembly 10, thereby enabling the membrane electrode assembly 10 to be pressed against the anode flow field plate 21'. .

As shown in Figures 2A and 6 of the drawings, each of the guide walls 216 includes a high end 2161 and a low end 2162 extending downward from the high end 2161, wherein each two adjacent guide walls 216 are formed at its high end 2161. The fluid passage 213 between and forms the cooling passage 217 between its lower end 2162. Accordingly, the cooling passage 217 communicates with the fluid passage 213 to form a through passage, wherein the through passage allows fluid to flow through the cooling passage 217 and the fluid passage 213. Optionally, the lower end 2162 is longer than the high end 2161 such that the length of the cooling passage 217 is longer than the length of the fluid passage 213.

It can be understood that the structure in which the fluid passage 213 of the cathode flow field plate 21 communicates with the cooling passage 217 to form a completely penetrating passage (or groove) enables the cooling passage 217 to realize the fuel of the present invention. At the same time as the heat dissipation function of the stack, the external reactive fluid is guided to the fluid passage 213. Further, the cooling passage 217 of the cathode flow field plate 21 realizes the dual functions of gas supply and heat dissipation, and the first end portion 215 of the cathode flow field plate 21 and the two lateral edges 2141 of the cathode plate body 214 are The membrane electrode assembly 10 has a larger contact surface, thereby providing the fuel cell stack of the present invention with better heat dissipation and lowering fan speed sensitivity. Accordingly, as the heat dissipation effect increases and the fan speed sensitivity decreases, the overall volume and weight of the fuel cell can be reduced at the same power output relative to the larger fuel cells that need to be constructed in the prior art. Furthermore, the configuration of the cooling passage 217 of the present invention can reduce the thickness of the cathode flow field plate 21. If the fluid passage of the conventional cathode flow field plate is designed to have a depth of 3 mm, the conventional cathode flow field plate needs to have a thickness of at least 4 mm to maintain the mechanical strength of the cathode flow field plate and ensure heat dissipation efficiency. And if it is the cathode flow field plate 21 of the present invention, when its fluid passage 213 is set to be 3 mm deep The thickness of the cathode flow field plate 21 can be configured to be less than 4 mm. In other words, the cooling passage 217 can be configured as a part of the fluid passage 213 such that the thickness of the cathode flow field plate 21 can be lowered. That is, the cathode flow field plate 21 of the present invention can be thinner than a conventional stencil when achieving the same heat dissipating area; because the cooling passage 217 of the present invention can pass the cathode flow when the fluid passes through the fluid passage 213 The entire cross section of the field plate 21 serves as heat dissipation. Therefore, the cathode flow field plate 21 of the present invention can provide more heat dissipation regions for heat dissipation at the same thickness as conventional panels.

As shown in Figures 3A and 3B of the accompanying drawings, the anode flow field plate 21' of the flow field plate group 20 has an inner side and an outer side, wherein the inner and outer sides of the anode flow field plate 21' are both planar sides. The inner side of the anode flow field plate 21' forms a channel side 212' and the outer side forms a planar side 211', wherein the channel side 212' of the anode flow field plate 21' forms at least one fuel passage 213', wherein The fuel passage 213' faces the membrane electrode assembly 10 such that a fuel, such as hydrogen fuel, can be supplied to the membrane electrode assembly 10 through the fuel passage 213'. The fuel passage 213' is recessed in the passage side 212' of the anode flow field plate 21'. Preferably, the anode flow field plate 21' includes an anode plate body 214' and two opposite ends, two second ends 215', wherein the anode plate body 214' extends at the two second ends 215 The anode plate body 214' and the second end portion 215' of the anode flow field plate 21' form a continuous sealing plane 2120' formed on the channel side 212' of the anode flow field plate 21'. . In other words, when the fuel cell stack is stacked, the planar side 211 of the cathode flow field plate 21 of the flow field plate group 20 and the channel side 212' of the anode flow field plate 21' can be the film respectively. The electrode assembly 10 provides a flat support, and the planar side 211 of the cathode flow field plate 21 and the channel side 212' of the anode flow field plate 21' are sealingly pressed against the membrane electrode assembly 10.

1A, 1B and 4, the flow field plate set 20 further includes a gasket 22, wherein the gasket 22 is disposed on the membrane electrode assembly 10 and the anode flow field plate 21', wherein A gasket 22 is disposed on the channel side 212' of the anode flow field plate 21'.

2A to 4, when the fuel cells are stacked, each adjacent two fuel cells are assembled to each other, and the planar side 211' of the anode flow field plate 21' of the previous fuel cell Coupling with the channel side 212 of the cathode flow field plate 21 of the next fuel cell, wherein the planar side 211' of the anode flow field plate 21' of the previous fuel cell and the cathode flow field of the next fuel cell The channel side 212 of the plate 21 defines two fluid flow channels 2150 therebetween, wherein the fluid flow channels 2150 are in communication with the fuel passages 213', respectively, to enable fuel to pass from the fuel flow path 2150 through the fuel. Channel 213' flows to another fluid flow channel 2150.

2A to 4, each fluid flow path 2150 has a first opening 21501' and a second opening 21502', wherein the first opening 21501' and the second opening 21502' are both formed at the anode. The second end portion 215' of the flow field plate 21', wherein the gasket 2150 is disposed on the channel side 212' of the anode flow field plate 21' and surrounds the fluid The first opening 21501' of the flow channel 2150 and the second opening 21502' prevent fuel from leaking from the gap between the membrane electrode assembly 10 and the channel side 212' of the anode flow field plate 21'. 2A through 4 of the drawings, each fuel passage 213' is in communication with two fluid flow passages 2150, respectively, to allow fuel to flow from one fluid flow passage 2150 through the fuel passage 213' to the other fluid flow passage 2150. . Correspondingly, the first opening 21501' and the second opening 21502' of the fluid flow path 2150 are respectively two penetrating holes formed in the two second end portions 215' of the anode flow field plate 21'. And are set to align with each other. In particular, each fuel passage 213 is disposed between the second end portion 215' of the anode flow field plate 21' and has a serpentine structure to extend the flow distance of the fuel, wherein each fuel passage 213' The two ends are respectively connected to the second opening 21502', as shown in FIG. 3B of the drawing. In other words, fuel is directed through the fuel passage 213' between the two second openings 21502' of the second end 215' of the anode flow field plate 21'. Alternatively, the fuel passage 213' can also be provided with other suitable shapes.

2A to 4, each fluid flow path 2150 is formed on the channel side 212 of the cathode flow field plate 21, wherein each first end portion 215 of the cathode flow field plate 21 further has a set A sealing groove 21502 surrounding the fluid flow path 2150. Correspondingly, the sealing groove 21502 is a groove formed in the channel side 212 of the cathode flow field plate 21 to surround the fluid channel 2150. The flow field plate set 20 further includes two sealing rings 23, wherein the sealing ring 23 is respectively disposed in the sealing groove 21502 to prevent fuel from the planar side 211' of the anode flow field plate 21' and the cathode flow field plate. The gap between the channel sides 212 of 21 leaks.

2A to 4, each fluid flow path 2150 further has a third opening 21501 formed in the first end portion 215 of the cathode flow field plate 21, wherein the third opening 2501 passes through the cathode Flow field plate 21. It is noted that when a group of fuel cells are stacked on each other to form a fuel cell stack, the third opening 21501 of the first end portion 215 of the cathode flow field plate 21 and the corresponding anode flow field plate The second opening 21502' of the second end 215' of 21' forms a fuel flow passage 200 such that hydrogen fuel can be supplied through the fuel flow passage 200 of the fuel cell stack.

Optionally, the fluid flow channel 2150 is formed on the planar side 211' of the anode flow field plate 21' and the two sealing grooves 21502 are respectively disposed around the fluid flow channel 2150, wherein the flow field plate group 20 further includes Two seal rings 23, wherein the seal rings 23 are respectively disposed in the seal groove 21502 to prevent fuel from between the plane side 211' of the anode flow field plate 21' and the channel side 212 of the cathode flow field plate 21 The gap leaks.

As shown in FIG. 3B of the accompanying drawings, the gasket 22 of the battery cell of the fuel cell stack according to the preferred embodiment of the present invention has a hollow structure to achieve a sealing portion on the channel side of the anode flow field plate 21'. The circumference of 212'. In other words, the gasket 22 is a hollow structure to allow a fluid, such as a gas, to pass therethrough. The gasket 22 is further sized and shaped to match the channel side 212' of the anode flow field plate 21'. Seal of the gasket 22 as shown in FIG. 3B Portions are respectively disposed at the second end portion 215' of the anode flow field plate 21' and the anode plate body 214' to form a closed environment for hydrogen flow. It will be appreciated that the fuel passage 213' is not covered by the gasket 22.

Figure 3B of the accompanying drawings also shows a fuel cell stack design in accordance with a preferred embodiment of the present invention, i.e., regardless of the type of sealing employed, such as an adhesive pad, the adhesive pad is in a compressed state. It is worth mentioning that since the membrane electrode assembly 10 and the planar sides 211, 212' of the cathode and cathode

flow field plates

21, 21' are sealed by the gasket 22, a closed environment is formed for hydrogen flow, thereby The channel side 212' of the anode flow field plate 21' is sealed and protected from hydrogen leakage. Accordingly, the gasket 22 of the present invention can be a loop gasket or an adhesive gasket. The gasket 22 is preferably a gasket structure made of a flexible material disposed on the channel side 212' of the anode flow field plate 21' to prevent hydrogen leakage when the stack is in operation. Therefore, the flow field plate assembly 20 requires only one gasket 22 to achieve a seal between the planar side 211 of the cathode flow field plate 21 and the channel side 212' of the anode flow field plate 21'.

When the flow field plate (cathode flow field plate 21) 21 is used as a cathode flow field plate of a fuel cell, the planar side 211 of the cathode flow field plate 21 is mounted to the membrane electrode assembly 10. The proton exchange membrane fuel cell is configured to be open to the atmosphere, and therefore an oxidant such as air (or oxygen) is blown into the fluid passage 213 through the cathode flow field plate 21. The configuration of the cooling passage 217 enhances air cooling efficiency because heat is dissipated and separated through the cooling passage 217. The cooling passage 217 enhances the heat dissipation effect and enables the cathode flow field plate 21 to be thinner than the conventional type. A thinner and lighter fuel cell stack can make it more portable than the prior art.

In particular, the cooling passage 217 is molded from the cathode flow field plate 21 to reduce the sensitivity of the film moisture content to the fan speed. The cooling passage 217 is formed with respect to each fluid passage 213. As the gas passes through the cooling passage 217 and the fluid passage 213 of the cathode flow field plate 21, the gas flow will only carry heat away from the cathode flow field plate 21 through the cooling passage 217. The cooling passage 217 and the fluid passage 213 will maintain the water content of the membrane electrode assembly 10 because the heat dissipation gas flow through the cooling passage 217 is not in direct contact with the membrane electrode assembly 10. Therefore, when the fan speed increases or slows down, only part of the airflow directly affects the water content of the membrane electrode assembly 10, but all airflows have a cooling effect. In other words, the battery voltage of the fuel cell becomes less sensitive to the fan speed.

Furthermore, the cathode flow field plate 21 provided by the present invention can likewise provide heat and water management for the fuel cell. Accordingly, the membrane electrode assembly 10 requires a high water content to maintain a low internal resistance. When the gas is blown into and through the fluid passage 213, it is cooled only by the cooling passage 217, and the cathode flow field plate 21 does not accelerate the evaporation of water to prevent the water content of the membrane electrode assembly 10 from being lowered.

It is worth mentioning that the bright flow field plate set 20 according to a preferred embodiment of the invention can make the difference between the fuel cell stacks smaller. In other words, the fuel cells using the flow field plate set 20 of the present invention have uniformity between them. Therefore, the fuel cell stack provided by the present invention can more easily achieve the uniformity of the battery voltage by being able to adopt a higher hydrogen pressure.

7A through 7C illustrate an alternate implementation of the cathode flow field plate 21 of the flow field plate set 20 of the fuel cell stack in accordance with a preferred embodiment of the present invention, wherein the flow field plate set 20A A cathode flow field plate 21A and an anode flow field plate 21' are included, wherein the cathode flow field plate 21A has a planar side 211A and a channel side 212A, and includes a cathode plate body 214A and two opposite ends, two First end portions 215A, wherein the cathode plate body 214A extends between the first end portions 215A, wherein the cathode plate body 214A includes two lateral edges 2141A and a set of guiding walls 216A, wherein the guiding walls 216A are respectively Separably disposed between the lateral edges 2141A, wherein each two adjacent 216A form a fluid passage 213A therebetween, and each guide wall 216A forms a cooling passage 217A, wherein the cooling passage 217A Formed on the channel side 212A of the cathode flow field plate 21, wherein each of the cooling channels 217A extends from one lateral edge 2141A of the cathode plate body 214A to the other lateral edge 2141A to enable fluid to flow through the cooling channel 217A . Preferably, each of the first end portions 215A of the cathode plate body 21A forms a fluid flow path 2150A, wherein the fluid passage 2150A has a third opening 21501A and a seal groove 21502A.

8A through 8F illustrate another alternative implementation of the flow field plate set 20 of the fuel cell stack in accordance with a preferred embodiment of the present invention, wherein the flow field plate set 20C includes at least two flow fields The plate 21C, wherein each flow field plate 21C includes a cathode plate body 211C, an anode plate body 212C and a set of guide walls 213C, wherein the cathode plate body 211C forms a set of first fluid grooves 2110C spaced apart from each other, wherein The guiding wall 213C is disposed between the cathode plate body 211C and the anode plate body 212C so as to be spaced apart such that each adjacent two guiding walls 213C form a second fluid groove 2130C therebetween. The first fluid groove 2110C of the cathode plate body 211C is disposed to be in parallel with and in communication with the second fluid groove 2130C, respectively, such that each of the first fluid grooves 2110C forms a continuous fluid passage with the corresponding second fluid groove 2130C. 214C, wherein the fluid passage 214C has a first passage opening 2141C, a second passage opening 2142C, and a third passage opening 2143C, wherein the third passage opening 2143C of the fluid passage 214C is disposed toward the membrane electrode assembly 10, thereby The fluid passage 214C is allowed to allow a reactive material fluid such as air, oxygen, or the like to flow between the first passage opening 2141C of the fluid passage 214C and the second passage opening 2142C, and is supplied to the third passage opening 2143C through the third passage opening 2143C The membrane electrode assembly 10. Preferably, the length of the first fluid groove 2110C is greater than the length of the second fluid groove 2130C, and the width of the first fluid groove 2110C is smaller than the width of the second fluid groove 2130C.

As shown in FIGS. 8A to 8F of the drawings, each flow field plate 21C has a first channel side 215C and a second channel side 216C, wherein the first channel side 215C of the cathode plate body 211C is formed at the cathode. An outer side of the plate body 211C, the second channel side 216C of the anode plate body 212C is formed on an outer side of the anode plate body 212C, wherein the flow field plate 21C has at least one portion disposed on the flow field plate 21C Two-channel side 216C fuel passage 217C, and the second channel side 216C of the flow field plate 21C are disposed toward the membrane electrode assembly 10 such that a fuel, such as hydrogen, can be supplied to the membrane electrode assembly 10 through the fuel passage 217C. In other words, the first fluid groove 2110C of the cathode plate body 211C is formed on the outer side of the cathode plate body 211C, and the fuel passage 217C of the anode plate body 212C is formed on the outer side of the anode plate body 212C.

As shown in FIG. 8A of the accompanying drawings, the flow field plate group 20C of the fuel cell according to the preferred embodiment of the present invention includes at least two flow field plates 21C, wherein each of the membrane electrode groups 10 is disposed adjacent to two The second channel side 216C of the previous flow field plate 21C in the flow field plate is between the first channel side 215C of the subsequent flow field plate 21C. In other words, the second channel side 216C of the previous one of the adjacent flow field plates 21C, the first channel side 215C of the latter flow field plate 21C, and the membrane electrode assembly 10 form a battery cell .

As shown in FIG. 8B to FIG. 8F of the drawing, the guide wall 213C of each flow field plate 21C of the flow field plate group 20C is disposed on one inner side of the anode plate body 212C, and from the anode plate body 212C. This inner side extends. Preferably, the guiding wall 213C of the flow field plate 21C is integrally formed with the anode plate body 212C. More preferably, the cathode plate body 211C of the flow field plate 21C of the flow field plate group 20C is detachably disposed at the guide wall 213C.

As shown in FIGS. 8A to 8F of the accompanying drawings, the cathode plate body 211C of the flow field plate 21C of the flow field plate group 20C has a receiving groove 218C formed on one inner side of the cathode plate body 211C, wherein the receiving portion 218C is accommodated therein. The shape and size of the groove 218C are set according to the guide wall 213C of the flow field plate 21C to accommodate the guide wall 213C of the flow field plate 21C therein, and the second fluid formed by the guide wall 213C The grooves 2130C are respectively in line with and in communication with the first fluid groove 2110C of the cathode plate body 211C, thereby forming the fluid passage 214C. More preferably, the depth of the receiving groove 218C is the same as the height of the guiding wall 213C of the flow field plate 21C, so that the guiding wall 213C of the flow field plate 21C can be accommodated in the cathode plate body 211C. The receiving groove 218C.

As shown in FIGS. 8A to 8F of the accompanying drawings, the cathode plate body 211C of the flow field plate 21C of the flow field plate group 20C includes two opposite end portions, and the two first end portions 2111C and the two extend respectively. a first lateral edge 2112C between the first end portion 2111C and a first forming portion 2113C extending longitudinally between the first lateral edge 2112C, wherein the first forming portion 2113C is formed to extend in the first lateral direction a first fluid groove 2110C between the edges 2112C, wherein the first end portion 2111C of the cathode plate body 211C and the first lateral edge 2112C form a continuous sealing plane 2150C on the first channel side 215C of the flow field plate 21C Wherein the continuous sealing plane 2150C is disposed around the first forming portion 2113C of the cathode plate body 211C; the anode plate body 212C of the flow field plate 21C includes two opposite ends, two second ends 2121C, Two second lateral edges 2122C extending between the second ends 2121C and a second forming portion 2123C extending longitudinally between the second lateral edges 2122C, wherein the second forming portion 2123C is formed to extend over Fuel passage 217 between the second ends 2121C C, wherein the anode plate The second end portion 2121C of the body 212C and the second lateral edge 2122C form a continuous sealing plane 2160C on the second passage side 216C of the flow field plate 21C, wherein the continuous sealing plane 2160C is disposed around the anode plate body 212C. The second forming portion 2123C, such that the first channel side 215C and the second channel side 216C of the flow field plate 21C can provide a flat level for the membrane electrode assembly 10 when the fuel cell stack is stacked The first channel side 215C and the second channel side 216C of the flow field plate 21C are supported and sealed against the membrane electrode assembly 10.

It can be understood that the first fluid tank 2110C of the cathode plate body 211C of the flow field plate 21C communicates with the second fluid tank 2130C to form a fully penetrating fluid passage 214C (or groove). The structure allows the second fluid tank 2130C to function to direct the external reactive fluid to the first fluid tank 2110C while achieving the heat dissipation function of the fuel cell stack of the present invention. Further, the second fluid groove 2130C of the flow field plate 21C realizes the dual functions of gas supply and heat dissipation, and the first end portion 2111C and the lateral edge 2112C of the cathode plate body 211C and the membrane electrode assembly 10 have one The larger contact surface allows the fuel cell stack of the present invention to have better heat dissipation and reduce fan speed sensitivity. Accordingly, as the heat dissipation effect increases and the fan speed sensitivity decreases, the overall volume and weight of the fuel cell can be reduced at the same power output relative to the larger fuel cells that need to be constructed in the prior art. Furthermore, the configuration of the fluid passage 214C of the present invention can reduce the thickness of the cathode plate body 211C (or the cathode flow field plate). If the fluid passage of the conventional cathode flow field plate is designed to have a depth of 3 mm, the conventional cathode flow field plate needs to have a thickness of at least 4 mm to maintain the mechanical strength of the cathode flow field plate and ensure heat dissipation efficiency. On the other hand, in the case of the cathode plate body 211C of the present invention, when the fluid passage 214C is set to a depth of 3 mm, the thickness of the cathode plate body 211C can be configured to be less than 4 mm. In other words, the second fluid tank 2130C can be configured as part of the fluid passage 214C such that the thickness of the cathode plate body 211C can be lowered. That is, the cathode plate body 211C of the present invention can be thinner than the conventional cathode flow field plate when the same heat dissipation area is realized; because the second fluid groove 2130C of the present invention can be used when the fluid passes through the fluid passage 214C The entire cross section of the cathode plate body 211C is used as heat dissipation. Therefore, the cathode plate body 211C of the present invention can provide more heat dissipation regions for heat dissipation at the same thickness as conventional panels.

As shown in FIG. 8A to FIG. 8F of the drawing, each first end portion 2111C of the cathode plate body 211C of the flow field plate 21C of the flow field plate group 20C has a first communication opening 21110C, and the anode plate body Each of the second ends 2121C of the 212C has a second communication opening 21210C, wherein the first communication opening 21110C of the first end portion 2111C of the cathode plate body 211C and the corresponding anode plate body 212C are respectively The second communication opening 21210C of the two end portions 2121C communicates with each other and forms a fuel flow path 200C, wherein both ends of each of the fuel passages 217C of the flow field plate 21C are respectively communicated with the fuel flow path 200C, thereby causing hydrogen fuel Passing the fuel cell stack The fuel flow path 200C of the flow field plate 21C of the flow field plate group 20C is supplied.

As shown in FIGS. 8A to 8F of the accompanying drawings, the seal between the adjacent two flow field plates 21C of the flow field plate group 20C can be realized by a gasket 22C, wherein the gasket 22C is a hollow structure. And the sealing portion of the gasket 22C is disposed on the outer circumference of the anode plate body 212C of the previous flow field plate 21C. In other words, the gasket 22C is a hollow structure to allow a fluid, such as a gas, to pass therethrough. The gasket 22C is further provided in a size and shape that matches the outer side of the anode plate body 212C. As shown in FIG. 8A to FIG. 8F, the gaskets 22C are respectively disposed on the outer side of the anode plate body 212C of the previous flow field plate 21C of two adjacent flow field plates 21C, wherein the gasket 22C is a hollow. Structure, and a sealing portion of the gasket 22C is disposed between the anode plate body 212C of the previous flow field plate 21C and the cathode plate body 211C of the subsequent flow field plate 21C and the periphery of the membrane electrode group 10 is disposed Between the sealing portion of the gasket 22C and the anode plate body 212C of the previous flow field plate 21C, so that the anode plate body 212C of the previous flow field plate 21C, the cathode plate body of the latter flow field plate 21C 211C and the membrane electrode assembly 10 form a sealed space for fuel flow. Further, both ends of the gasket 22C are respectively disposed at the end of the anode plate body 212C of the previous flow field plate 21C and the end portion of the cathode flow field plate 211C of the corresponding subsequent flow field plate 21C. Between the two seals 22C being disposed around the two first communication openings 21110C of the anode plate body 212C of the previous flow field plate 21C and the second flow communication plate 211C of the latter flow field plate 21C The second opening 2110C is such that when the fuel cell is assembled and the gasket 22C is squeezed between the two flow field plates 21C, the anode plate body 212C and the latter flow field plate of the previous flow field plate 21C The cathode plates 211C of 21C are sealedly stacked on each other to prevent leakage of fuel from the gap between the anode plate body 211C of the previous flow field plate 21C and the cathode plate body 211C of the latter flow field plate 21C. It will be appreciated that the fuel passage 217C is not covered by the gasket 22C. Preferably, the gasket 22C is further disposed at both ends of the cathode plate body 211C and the fuel passage 217C surrounding the anode plate body 212C to form a sealed space for hydrogen flow. In other words, the fuel passage 217C is not covered by the gasket 22C.

As shown in FIG. 8B of the drawing, the first end portion 2111C of the cathode plate body 211C of the flow field plate 21C of the flow field plate group 20C is separately and sealingly disposed on the anode plate body 212C. The second end portion 2121C prevents the hydrogen fuel from passing through the first end portion 2111C of the cathode plate body 211C of the flow field plate 21C of the flow field plate group 20C and the corresponding second end portion 2121C of the anode plate body 212C. The gap between the leaks. Therefore, the first end portion 2111C of the cathode plate body 211C of the flow field plate 21C of the flow field plate group 20C and the second end portion 2121C of the corresponding anode plate body 212C are sealingly coupled to each other. The first end portion 2111C of the cathode plate body 211C and the second end portion 2121C of the corresponding anode plate body 212C are formed to form a gap between the two communicating with the fuel flow path 200C. The first end portion 2111C of the cathode plate body 211C of the flow field plate 21C and the corresponding anode The seal between the second end portion 2121C of the plate body 212C may pass through the first communication opening 21110C (or around the corresponding anode plate body 212C) disposed around the first end portion 2111C of the cathode plate body 211C. The seal ring or gasket 23C of the second communication opening 21210C) of the second end portion 2121C is realized. In other embodiments, the sealing between the first end portion 2111C of the cathode plate body 211C and the second end portion 1211C of the corresponding anode plate body 212C passes through the first end of the cathode plate body 211C. The portion 2111C and the corresponding second end portion 2121C of the anode plate body 212C are brought into close contact with each other to be realized. In other embodiments, the sealing between the first end portion 2111C of the cathode plate body 211C and the second end portion 2121C of the corresponding anode plate body 212C is performed by using a glue or an adhesive to the cathode plate body 211C. The first end portion 2111C and the second end portion 1211C of the corresponding anode plate body 212C are adhered together to be realized.

Figures 9A through 9F illustrate another alternative implementation of the flow field plate set 20D of the fuel cell stack in accordance with a preferred embodiment of the present invention, wherein the flow field plate set 20D includes at least two flow fields The plate 21D, wherein each flow field plate 21D includes a flow field plate 211D, a set of first guide walls 212D, and a set of second guide walls 213D, wherein the flow field plate 211D has a cathode side 2111D and an anode side 2112D, wherein the flow field plate 211D has at least one fuel passage 215D disposed on the anode side 2112D, wherein the first guide wall 212D is spaced apart from the cathode side 2111D of the flow field plate 211D, The second guiding walls 213D respectively extend from the first guiding wall 212D such that each adjacent two guiding walls 212D form a first fluid passage 216D between the two, and corresponding two adjacent The second guide wall 213D forms a second fluid passage 217D therebetween, wherein the first fluid passage 216D is in communication with the second fluid passage 217D, wherein each first fluid passage 216D has two first passage openings 2161D, each second fluid channel 217D a second passage opening 2171D, wherein the second passage opening 2171D of the second fluid passage 217D is disposed toward the previous membrane electrode assembly 10 such that the first fluid passage 216D allows reactive substances such as air or oxygen to be capable of The first fluid passage 216D and the second passage opening 2171D enabling the reactive material to pass through the second fluid passage 217D are supplied to the membrane electrode assembly 10; wherein the fuel passage 215D of the flow field plate 211D is The latter is directed toward the latter membrane electrode assembly 10 so that hydrogen fuel can be supplied to the membrane electrode assembly 10 through the fuel passage 215D.

It can be understood that the first fluid passage 216D allows a fluid such as air or oxygen to flow from one first passage opening 2161D to the other first passage opening 2161D. Therefore, the first fluid passage 216D provides a reaction in the phase of the membrane electrode assembly 10. At the same time as the active material, it also has a cooling effect. Preferably, the length of the first fluid passage 216D is greater than the length of the second fluid passage 217D, and the width of the first fluid passage 216D is smaller than the width of the second fluid passage 217D.

As shown in FIG. 9A of the accompanying drawings, the flow field plate group 20D includes at least two flow field plates 21D, wherein the fuel cell Each membrane electrode group 10 of the fuel cell unit of the stack is disposed between two adjacent flow field plates 21D of the flow field plate group 20D, wherein the previous flow field plate 21D of the adjacent two flow field plates 21D The second fluid passage 217D and the fuel passage 215D of the latter flow field plate 21D are respectively disposed toward the membrane electrode assembly 10 such that a reactive substance such as air, and a fuel such as hydrogen can pass through the second fluid, respectively. A channel 217D and the fuel channel 215D are supplied to the membrane electrode assembly 10.

As shown in FIGS. 9A to 9F of the drawings, each flow field plate 21D of the flow field plate group 20D further includes a support plate 214D, wherein the support plate 214D is disposed at the first guide wall 212D, wherein the support The plate 214D forms a receiving groove 2140D, and when the supporting plate 214D is disposed at the first guiding wall 212D, the second guiding wall 213D of the flow field plate 21D is accommodated in the receiving groove 2140D of the supporting plate 214D. . In other words, the height of the second guiding wall 213D of the flow field plate 21D is not greater than the depth of the receiving groove 2140D of the supporting plate 214D, so that the second guiding wall 213D of the flow field plate 21D is accommodated therein. The receiving groove 214D is received in the receiving groove 2140D. Preferably, the length of the first guiding wall 212D of the flow field plate 21D of the flow field plate group 20D is greater than the length of the second guiding wall 213D, so that the supporting plate 214D can be disposed at the first guiding wall 212D. . More preferably, the second guiding wall 213D extends from the middle portion of the first guiding wall 212D such that both first lateral edges 2142D of the supporting plate 214D can be disposed at the top end of the first guiding wall 212D. Most preferably, the support plate 214D is detachably disposed on the first guide wall 212D.

It is noted that the alternately implemented support plate 214D of the flow field plate set 20D of the fuel cell stack in accordance with a preferred embodiment of the present invention functions as an assembly support in the fuel cell stack of the present invention. In other words, the support plate 214D of the flow field plate 21D of the flow field plate set 20D may not involve providing the membrane electrode assembly 10 with a reactive substance or fuel. Therefore, the support plate 214D of the flow field plate 21D of the flow field plate group 20D can be made of a non-conductive rigid material. That is, the support plate 214D of the flow field plate 21D of the flow field plate group 20D can be made of a material having high strength and low weight to reduce the weight-to-power ratio of the fuel cell stack.

As shown in FIGS. 9A to 9F of the accompanying drawings, the support plate 214D of the flow field plate 21D of the flow field plate group 20D has an outer side and an inner side, wherein the outer side of the support plate 214D is disposed toward the film electrode. Group 10 and forming a continuous sealing plane 210D, the anode side 2112D of the flow field plate 211D of the flow field plate 21D forming a continuous sealing plane 21120D, wherein the flow field plate 211D The continuous sealing plane 21120D of the anode side 2112D is disposed around the fuel passage 215D such that when the fuel cell stack is stacked, the outer side of the support plate 214D of the flow field plate 21D and the anode side 2112D can respectively The membrane electrode assembly 10 provides a flat support, and the outer side of the support plate 214D and the anode side 2112D of the flow field plate 211D can be sealingly pressed against the membrane electrode assembly 10, respectively.

As shown in FIGS. 9A to 9F of the accompanying drawings, the support plate 214D of the flow field plate 21D of the flow field plate group 20D includes two opposite ends, and the two first end portions 2141D and the two extend respectively. a first lateral edge 2142D between the first end portions 2141D, wherein the first end portion 2141D of the support plate 214D and the first lateral edge 2142D form the receiving groove 2140D and the continuous sealing plane 210D; the flow field plate The flow field plate 211D of 21D includes two opposite ends, two second ends 2113D, two second lateral edges 2114D extending between the second ends 2113D and a longitudinal extension a forming portion 2115D between the second lateral edges 2114D, wherein the forming portion 2115D forms a fuel passage 215D extending between the second end portions 2113D, wherein the second end portion 2113D of the flow field plate body 211D and the first portion The second lateral edge 2114D forms the continuous sealing plane 21120D on the anode side 2112D of the flow field plate 21D, wherein the continuous sealing plane 21120D is disposed around the forming portion 2115D of the anode plate body 212D, such that when the fuel cell stack is The support plate 2 of the flow field plate 21D when stacked The outer side of the 14D and the anode side 2112D are capable of providing a flat support for the membrane electrode assembly 10, respectively, and enabling the outer side of the support plate 214D and the anode side 2112D to be sealingly pressed against the membrane electrode assembly 10, respectively.

It can be understood that the first fluid passage 216D of the flow field plate 21D communicates with the second fluid passage 217D to form a completely penetrating passage (or groove). The first fluid passage 216D can be made. While the heat dissipation function of the fuel cell stack of the present invention is achieved, the external reactive fluid is guided to the second fluid passage 217D. Further, the first fluid channel 216D of the flow field plate 21D achieves the dual functions of air supply and heat dissipation, and the first end portion 2141D and the first lateral edge 2142D of the support plate 214D and the membrane electrode assembly 10 have A larger contact surface, such that when the support plate 214D is made of a good thermally conductive material, the fuel cell stack of the present invention has better heat dissipation and reduced fan speed sensitivity. Accordingly, as the heat dissipation effect increases and the fan speed sensitivity decreases, the overall volume and weight of the fuel cell can be reduced at the same power output relative to the larger fuel cells that need to be constructed in the prior art.

As shown in FIGS. 9A to 9F of the accompanying drawings, the support plate 214D of the flow field plate 21D of the flow field plate group 20D includes two first end portions 2141D, and the flow field plate body of the flow field plate 21D. 211D includes two opposite ends, two second ends 2113D, wherein each first end 2141D of the support plate 214D of the flow field plate 21D of the flow field plate group 20D has a first communication opening 21410D, Each of the second end portions 2113D of the flow field plate 211D has a second communication opening 21130D, wherein the first communication opening 21410D of the first end portion 2141D of the support plate 214D and the corresponding flow field plate respectively The second communication opening 21130D of the second end portion 2113D of the body 211D communicates with and forms a fuel flow path 200D, wherein both ends of each fuel passage 215D of the flow field plate 21D are respectively connected to the fuel flow path 200D. Thereby, hydrogen fuel can be supplied to the membrane electrode assembly 10 through the fuel flow path 200D of the flow field plate 21D of the flow field plate group 20D of the fuel cell stack.

As shown in FIGS. 9A to 9F of the accompanying drawings, the seal between the adjacent two flow field plates 21D of the flow field plate group 20D can be realized by a gasket 22D which is a hollow structure. And the sealing portion of the gasket 22D is disposed on one circumference of the anode side 2112D of the flow field plate 211D of the previous flow field plate 21D. In other words, the gasket 22D is a hollow structure to allow a fluid, such as a gas, to pass therethrough. The gasket 22D is further provided in a size and shape that matches the anode side 2112D of the flow field plate 211D. As shown in FIGS. 9A to 9F, the gasket 22D is a hollow structure, and the sealing portion of the gasket 22D is disposed in the flow field plate of the previous flow field plate 21D of the two adjacent flow field plates 21D. Between the anode side 2112D of the body 211D and the support plate 214D of the latter flow field plate 21D, wherein a circumference of the membrane electrode assembly 10 is disposed at the sealing portion of the gasket 22D and the previous flow field plate 21D The anode side 2112D of the flow field plate 211D is such that the flow field plate 211D of the previous flow field plate 21D, the support plate 214D of the latter flow field plate 21D, and the membrane electrode assembly 10 form a sealed space. For fuel flow. Further, both ends of the gasket 22D are respectively disposed at the end of the flow field plate 211D of the previous flow field plate 21D and the end portion of the support plate 214D of the corresponding subsequent flow field plate 21D. And wherein the gasket 22D is disposed to surround the two of the second communication opening 21130D of the flow field plate 211D of the previous flow field plate 21D and the two support plates 214D of the subsequent flow field plate 21D, respectively. A communication opening 21410D such that when the fuel cell is assembled and the gasket 22D is squeezed between two adjacent flow field plates 21D, the flow field plate 211D and the latter of the previous flow field plate 21D The support plates 214D of the flow field plate 21D are sealedly stacked on each other to prevent fuel from being between the flow field plate 211D of the previous flow field plate 21D and the flow field plate 211D of the latter flow field plate 21D. The gap leaks. It will be appreciated that the fuel passage 215D is not covered by the gasket 22D. Preferably, the gasket 22D is further disposed at both ends of the support plate 214D and the fuel passage 215D surrounding the flow field plate 211D to form a sealed space for hydrogen flow. In other words, the fuel passage 215D is not covered by the gasket 22D.

As shown in FIG. 9B of the drawing, the first end portion 2141D of the support plate 214D of the flow field plate 21D of the flow field plate group 20D is separately and sealingly disposed on the flow field plate body 211D. a second end portion 2113D for preventing hydrogen fuel from passing through the first end portion 2141D of the support plate 214D of the flow field plate 21D of the flow field plate group 20D and the corresponding second end portion 2113D of the flow field plate body 211D The gap between the leaks. Therefore, the first end portion 2141D of the support plate 214D of the flow field plate 21D of the flow field plate group 20D and the corresponding second end portion 2113D of the flow field plate body 211D are sealingly coupled to each other. The first end portion 2141D of the support plate 214D and the corresponding second end portion 2113D of the flow field plate body 211D are formed to form a gap between the two communicating with the fuel flow path 200D.

It should be noted that the first end portion 2141D of the support plate 214D of the flow field plate 21D and the corresponding flow The seal between the second end portion 2113D of the field plate body 211D may pass through the first communication opening 21410D disposed around the first end portion 2141D of the support plate 214D (or around the corresponding flow field plate body 211D) The seal ring or seal ring 23D of the second communication opening 21130D) of the second end portion 2113D is realized. In other embodiments, the seal between the first end 2141D of the support plate 214D of the flow field plate 21D and the second end portion 2113D of the corresponding flow field plate 211D passes the support plate 214D. The first end portion 2141D and the corresponding second end portion 2113D of the flow field plate body 211D are closely attached to each other. In other embodiments, the seal between the first end 2141D of the support plate 214D and the corresponding second end portion 2113D of the flow field plate 211D is achieved by using glue or adhesive to the support plate 214D. The first end portion 2141D and the corresponding second end portion 2113D of the flow field plate body 211D are adhered together to be realized.

It can be understood that the anode flow field plate (anode plate body or flow field plate body) and the cathode flow field plate (cathode plate body or flow field plate body) of the fuel cell according to the preferred embodiment of the present invention are used. The material is typically a conductive metal. The metal is strong, lightweight and electrically conductive, but the material is not limited to metal. Conductive composite materials containing graphite, carbon black, carbon fibers, and/or nanocarbons, or even materials such as conductive graphite, carbon black, carbon fibers, and/or nanocarbon, which are reinforced, can be used in the structure of the present invention.

It should be understood by those skilled in the art that in the disclosure of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", " The orientation or positional relationship of the indications of "upright", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is merely for convenience of description of the present invention and The above description of the invention is not to be construed as a limitation of the invention.

It will be understood that the term "a" is understood to mean "at least one" or "one or more", that is, in one embodiment, the number of one element may be one, and in other embodiments, the element The number may be plural, and the term "a" should not be construed as limiting the quantity.

Those skilled in the art will appreciate that the embodiments of the invention, which are illustrated in the drawings and described above, are merely illustrative and not limiting.

It can thus be seen that the object of the invention can be fully and efficiently accomplished. The embodiment has been described and described in detail to explain the principles of the present invention and the invention is not to be construed as limited. Accordingly, the present invention includes all modifications that come within the scope and spirit of the appended claims.

Claims

A cathode flow field plate for a fuel cell, wherein the fuel cell has a membrane electrode assembly including a cathode flow field plate, wherein the cathode flow field plate is arranged to seal the membrane electrode assembly, wherein The cathode flow field plate has a set of fluid passages and a set of cooling passages, wherein the cooling passages are in communication with the fluid passages, respectively.
The cathode flow field plate of claim 1 wherein said cathode flow field plate has a planar side and a channel side, wherein said planar side is located on an inner side of said cathode flow field plate, wherein said channel side is located An outer side of the cathode flow field plate, wherein the inner side of the cathode flow field plate faces the membrane electrode set, wherein the fluid channel and the cooling channel are formed in the channel of the cathode flow field plate side.
The cathode flow field plate according to claim 2, wherein each of said fluid passages is a penetrating passage extending from said outer side of said cathode flow field plate to said inner side of said cathode flow field plate To enable fluid to flow along the fluid channel to the membrane electrode set, thereby facilitating electrochemical reactions to occur and generate electrical energy through the membrane electrode assembly.
The cathode flow field plate according to claim 2, wherein said cathode flow field plate comprises a plurality of guide walls spaced apart from said outer side of said cathode flow field plate to be between said guide walls The fluid passage and the cooling passage are formed.
The cathode flow field plate according to claim 3, wherein said cathode flow field plate comprises a plurality of guide walls spaced apart from said outer side of said cathode flow field plate to be between said guide walls The fluid passage and the cooling passage are formed.
An anode flow field plate for a fuel cell, wherein the fuel cell has a membrane electrode assembly including an anode flow field plate, wherein the anode flow field plate has a planar side and a channel side, wherein The planar side is located on an inner side of the anode flow field plate, wherein the channel side is located on an outer side of the anode flow field plate, wherein the channel side of the anode flow field plate is configured to seal the film An electrode group, wherein the anode flow field plate further includes at least one fuel passage, wherein the fuel passage is formed toward the passage side of the membrane electrode group, thereby enabling fuel to be supplied to the membrane electrode through the fuel passage group.
The anode flow field plate according to claim 6, wherein said anode flow field plate further has two openings, wherein said openings are respectively formed at opposite ends of said anode flow field plate, wherein said Both ends of the fuel passage are respectively extended to the opening to guide fuel flow between the openings through the fuel passage.
The anode flow field plate according to claim 6, wherein each of said fuel passages has a serpentine structure and is recessed on said passage side of said anode flow field plate.
The anode flow field plate according to claim 7, wherein each of said fuel passages has a serpentine structure and is recessed on said passage side of said anode flow field plate.
The anode flow field plate according to claim 9, wherein the opening is a penetrating groove that passes through the inner side and the outer side of the anode flow field plate.
A fuel cell, comprising:

a membrane electrode set; and

a first-rate field plate group, wherein the flow field plate group includes a cathode flow field plate and an anode flow field plate, wherein the membrane electrode assembly is sealed between the cathode flow field plate and the anode flow field plate ;

Wherein the cathode flow field plate has a planar side, an opposite channel side and a plurality of fluid channels formed on the channel side, wherein the planar side is located on a side of the cathode flow field plate facing the membrane electrode group Wherein the fluid passage is configured to enable fluid to flow along the fluid passageway to the membrane electrode set to facilitate electrochemical reaction to occur and generate electrical energy through the membrane electrode;

Wherein the anode flow field plate has a planar side, an opposite channel side and at least one fuel passage, wherein the planar side of the anode flow field plate is located on an inner side of the anode flow field plate, the anode flow The channel side of the field plate is located on an outer side of the anode flow field plate and seals the membrane electrode set, wherein each of the fuel flow channels of the anode flow field plate is formed in the anode flow field plate a channel side, wherein the fuel passage is configured to enable fuel to be supplied to the membrane electrode set through the fuel passage.
The fuel cell according to claim 11, wherein said anode flow field plate further comprises two openings, wherein said openings are respectively formed at opposite ends of said anode flow field plate, wherein said opening is worn Passing through the inner side and the outer penetrating groove of the anode flow field plate, wherein both ends of the fuel passage are respectively extended to the opening to guide fuel through the fuel passage at the opening Flow between.
A fuel cell according to claim 12, wherein each of said fuel passages has a serpentine structure and is recessed on said passage side of said anode flow field plate.
A fuel cell according to claim 13 further comprising a gasket disposed between said membrane electrode assembly and said anode flow field plate, wherein said anode flow field plate further comprises an extension at said end An anode plate body between the anode plate body and the end portion of the anode flow field plate forming a continuous sealing plane on the channel side of the anode flow field plate, wherein the gasket is set The sealing plane of the anode flow field plate.
The fuel cell according to claim 14, wherein when two or more of said fuel cells are stacked in an appropriate position, a preceding fuel cell is stacked on a next fuel cell, and said anode of said previous fuel cell The planar side of the flow field plate is coupled to the channel side of the cathode flow field plate of the next fuel cell, wherein The planar side of the anode flow field plate of the previous fuel cell and the channel side of the cathode flow field plate of the next fuel cell form two fluid flow paths therebetween, wherein the fluid Flow passages are respectively in communication with the fuel passage to enable fuel to flow from one fluid flow passage to the other fluid flow passage through the fuel passage.
A fuel cell according to claim 15, wherein each of said fluid flow paths has two openings, wherein said gasket is disposed on said channel side of said anode flow field plate to surround said fluid flow path The opening prevents leakage of fuel from a gap between the membrane electrode set and the channel side of the anode flow field plate.
A fuel cell according to claim 16, wherein each of said fluid flow paths is formed on said passage side of said cathode flow field plate, wherein a seal groove is provided around said fluid flow path, wherein said flow The field plate group further includes two seal rings respectively disposed in the seal groove to prevent fuel from between the planar side of the anode flow field plate and the channel side of the cathode flow field plate The gap leaks.
The fuel cell according to claim 11, wherein said cathode flow field plate further comprises a plurality of cooling passages, wherein said cooling passages are respectively formed on said passage side of said cathode flow field plate.
The fuel cell according to claim 18, wherein said cooling passages are penetrating passages uniformly formed in said cathode flow field plates to be aligned with said fluid passages, respectively.
The fuel cell according to claim 18, wherein said cooling passage is alternately disposed with said fluid passage.
A flow field plate set for a fuel cell, wherein the fuel cell has at least one membrane electrode set, characterized in that it comprises at least two flow field plates, wherein the membrane electrode sets of the fuel cells are respectively disposed in phases Between two flow field plates, wherein each flow field plate comprises a cathode plate body, an anode plate body and a set of guiding walls, wherein the cathode plate body forms a set of first fluid grooves spaced apart from each other, wherein The guide walls are spaced apart between the cathode plate body and the anode plate body such that each adjacent two guide walls form a second fluid groove between the two, wherein The first fluid grooves of the cathode plate body are disposed to communicate with the second fluid grooves, respectively, such that each of the first fluid grooves and the corresponding second fluid groove form at least one continuous fluid passage, wherein the fluid The passage has a first passage opening, a second passage opening and a third passage opening, wherein the anode plate body of the flow field plate has at least one fuel passage disposed on an outer side of the anode plate body The outer side of the anode plate body of the previous flow field plate of each adjacent two flow field plates is disposed toward the membrane electrode of the fuel cell disposed between adjacent two flow field plates a group such that fuel can be supplied to the membrane electrode assembly through the fuel passage, and the third passage opening of the fluid passage of the cathode plate body of the latter flow field plate is disposed toward the membrane electrode assembly Thereby causing the fluid passage to allow fluid to flow between the first passage opening and the second passage opening of the fluid passage and to be supplied to the membrane electrode of the fuel cell through the third passage opening group.
The flow field plate set according to claim 21, wherein said outer side of said anode plate body of a preceding flow field plate of adjacent two flow field plates forms a film battery for sealing said fuel cell a continuous sealing plane of the group, one outer side of the cathode plate body of the latter flow field plate forming another continuous sealing plane for sealing the membrane battery of the fuel cell, thereby sealing the membrane electrode assembly in the phase Adjacent between two flow field plates.
The flow field plate set according to claim 21, wherein said cathode plate body of each flow field plate has two first communication openings respectively provided at both end portions of said cathode plate body, said anode The plate body has two second communication openings respectively disposed at both ends of the anode plate body, wherein the first communication openings of the cathode plate bodies respectively correspond to the corresponding anode plate bodies The second communication opening is in communication with and forms a fuel flow passage, wherein both ends of each fuel passage of the flow field plate are respectively in communication with the fuel flow passage, so that fuel can pass through the flow field plate The fuel flow path is supplied to the membrane electrode assembly.
The flow field plate set according to claim 23, wherein both end portions of said cathode plate body of each flow field plate are separately and sealingly disposed at both end portions of said anode plate body to prevent Fuel leaks through a gap between the end of the cathode plate body of the flow field plate and the end of the corresponding anode plate body.
The flow field plate set according to claim 21, wherein said guide wall of each flow field plate is integrally formed with said anode plate body and extends from an inner side of said anode plate body.
The flow field plate set according to claim 24, wherein said guide wall of each flow field plate is integrally formed with said anode plate body and extends from said inner side of said anode plate body.
The flow field plate set according to claim 21, wherein said cathode plate body of said flow field plate has a receiving groove formed on an inner side of said cathode plate body, wherein said receiving groove has a shape and a size The guide wall of the flow field plate is disposed to be capable of accommodating the guide wall of the flow field plate therein, and the second fluid groove formed by the guide wall and the cathode, respectively The first fluid slots of the plate are in communication to form the fluid passage.
The flow field plate set according to claim 26, wherein said cathode plate body of said flow field plate has a receiving groove formed on an inner side of said cathode plate body, wherein said receiving groove has a shape and a size The guide wall of the flow field plate is disposed to be capable of accommodating the guide wall of the flow field plate therein, and the second fluid groove formed by the guide wall and the cathode, respectively The first fluid slots of the plate are in communication to form the fluid passage.
The flow field plate set according to claim 23, further comprising two seal rings, wherein the seal rings are respectively disposed at ends of the anode plate body of the flow field plate and the corresponding cathode plate body Between the ends, wherein each seal ring is disposed around the first communication opening and the anode of the cathode plate body of the flow field plate, respectively The second communication opening of the plate body such that both end portions of the cathode plate body of the flow field plate are separately and sealingly disposed at both ends of the anode plate body.
The flow field plate set according to claim 28, wherein a depth of said receiving groove of said cathode plate body of said flow field plate is the same as a height of said guide wall of said flow field plate, thereby causing said The guide wall of the flow field plate can be accommodated in the receiving groove of the cathode plate body.
A fuel cell, comprising:

At least one membrane electrode set; and

a flow field plate set, wherein the flow field plate set includes at least two flow field plates, wherein the membrane electrode sets are respectively disposed between adjacent two flow field plates, wherein each flow field plate includes a cathode a plate body, an anode plate body and a set of guide walls, wherein the cathode plate body forms a set of spaced apart first fluid grooves, wherein the guide walls are spaced apart from each other at the cathode plate body and Between the anode plates, such that each adjacent two guiding walls form a second fluid groove between the two, wherein the first fluid grooves of the cathode plate are respectively disposed with the second The fluid slots are in communication such that each of the first fluid slots and the respective second fluid slots form at least one continuous fluid passage, wherein the fluid passage has a first passage opening, a second passage opening, and a third passage An opening, wherein the anode plate body of the flow field plate has at least one fuel passage disposed on an outer side of the anode plate body, wherein the anode of a previous flow field plate of two adjacent flow field plates The outer part of the board Provided toward the membrane electrode assembly disposed between adjacent two flow field plates such that fuel can be supplied to the membrane electrode assembly through the fuel passage, the cathode plate of the latter flow field plate The third passage opening of the fluid passage of the body is disposed toward the membrane electrode assembly such that the fluid passage allows fluid to flow in the first passage opening and the second passage opening of the fluid passage Between and through the third passage opening is provided to the membrane electrode assembly.
A fuel cell according to claim 31, wherein said outer side of said anode plate body of a preceding flow field plate of adjacent two flow field plates forms a continuous sealing plane for sealing said film battery pack, One outer side of the cathode plate body of one flow field plate forms another continuous sealing plane for sealing the film battery pack to seal the membrane electrode assembly between adjacent two flow field plates.
A fuel cell according to claim 31, wherein said cathode plate body of each flow field plate has two first communication openings respectively provided at both end portions of said cathode plate body, said anode plate body Having two second communication openings respectively disposed at both ends of the anode plate body, wherein the first communication openings of the cathode plate bodies respectively correspond to the corresponding portions of the anode plate body Two communication openings are in communication and forming a fuel flow passage, wherein both ends of each fuel passage of the flow field plate are respectively in communication with the fuel flow passage such that fuel can pass through the fuel of the flow field plate A flow channel is provided to the membrane electrode assembly.
A fuel cell according to claim 33, wherein both end portions of said cathode plate body of each flow field plate are separately and sealingly disposed at both ends of said anode plate body to prevent fuel from passing through A gap between the end of the cathode plate body of the flow field plate and the end portion of the corresponding anode plate body leaks.
A fuel cell according to claim 31, wherein said guide wall of each flow field plate is integrally formed with said anode plate body and extends from one inner side of said anode plate body.
A fuel cell according to claim 34, wherein said guide wall of each flow field plate is integrally formed with said anode plate body and extends from said inner side of said anode plate body.
A fuel cell according to claim 31, wherein said cathode plate body of said flow field plate has a receiving groove formed on an inner side of said cathode plate body, wherein said receiving groove has a shape and a size according to said The guide wall of the flow field plate is disposed to be capable of accommodating the guide wall of the flow field plate therein, and the second fluid groove formed by the guide wall and the cathode plate body respectively The first fluid slots are in communication to form the fluid passage.
A fuel cell according to claim 33, further comprising two seal rings, wherein said seal rings are respectively disposed at ends of said anode plate bodies of said flow field plates and respective ends of said cathode plates Between the portions, wherein each of the seal rings is disposed to surround the first communication opening of the cathode plate body of the flow field plate and the second communication opening of the anode plate body, respectively, to make the flow Both ends of the cathode plate body of the field plate are separately and sealingly disposed at both ends of the anode plate body.
A fuel cell according to claim 31, further comprising at least one gasket, wherein said gaskets are respectively disposed on said outer side of said anode plate body of a preceding flow field plate of two adjacent flow field plates, Wherein the gasket is a hollow structure, and a sealing portion of the gasket is disposed between the anode plate body of the previous flow field plate and the cathode plate body of the latter flow field plate and the film The periphery of the electrode group is disposed between the sealing portion of the gasket and the anode plate body of the previous flow field plate, such that the anode plate body and the latter flow field plate of the previous flow field plate The cathode plate body and the membrane electrode group form a sealed space for fuel flow.
A fuel cell according to claim 39, wherein both ends of said gasket are respectively disposed at said end portion of said anode plate body of said previous flow field plate and said cathode of said corresponding latter flow field plate Between the ends of the flow field plate, wherein the gasket is disposed to surround the two first communication openings of the anode plate body of the previous flow field plate and the cathode flow field of the latter flow field plate Two second communication openings of the plate such that when the fuel cell is assembled and the gasket is squeezed between the two flow field plates, the anode plate body and the latter one of the previous flow field plate The cathode plates of the flow field plates are sealedly stacked on each other to prevent leakage of fuel from the gap between the anode plate body of the previous flow field plate and the cathode plate body of the latter flow field plate.
A flow field plate set for a fuel cell, wherein the fuel cell has at least one membrane electrode set, characterized in that it comprises at least two flow field plates, wherein the membrane electrode sets of the fuel cells are respectively disposed in phases Between two flow field plates, wherein each flow field plate comprises a flow field plate body, a set of first guide walls and a set of second guide walls, wherein the flow field plate body has a cathode side and an anode a side, wherein the flow field plate body has at least one fuel passage disposed on the anode side, wherein the first guide wall is spaced apart from the cathode side of the flow field plate body, The second guiding walls respectively extend from the first guiding wall such that adjacent two first guiding walls form a first fluid passage between the two, and corresponding two adjacent second guiding walls are formed a second fluid passage between the two, wherein the first fluid passage is in communication with the second fluid passage, wherein each first fluid passage has two first passage openings, each second fluid passage Has a second channel a port in which the anode side of the flow field plate of the previous flow field plate of two adjacent flow field plates is disposed toward the membrane electrode group disposed between adjacent two flow field plates, thereby Providing fuel to the membrane electrode set through the fuel passage, and the second passage opening of the second fluid passage of the flow field plate of the latter flow field plate is disposed toward the fuel cell The membrane electrode assembly such that the first fluid passage allows fluid to flow between the first passage openings of the fluid passage and is provided to the second passage opening of the second fluid passage The membrane electrode assembly of the fuel cell.
The flow field plate set according to claim 41, wherein each of said flow field plates further comprises a support plate, wherein said support plate is disposed on said first guide wall, wherein adjacent flow field plates are The anode side of the flow field plate of the previous flow field plate forms a continuous sealing plane for sealing the membrane electrode set disposed between adjacent two flow field plates, the latter flow field plate One outer side of the support plate forms another continuous sealing plane for sealing the membrane electrode set disposed between adjacent two flow field plates to seal the membrane electrode assembly in adjacent two flow field plates between.
A flow field plate set according to claim 42, wherein said support plate forms a receiving groove, and said second guide of said flow field plate when said support plate is disposed at said first guide wall A wall is received in the receiving groove of the support plate.
A flow field plate set according to claim 42, wherein said support plate of each flow field plate has two first communication openings respectively provided at both ends of said support plate, said flow field plate The body has two second communication openings respectively disposed at both ends of the flow field plate body, wherein the first communication opening of the support plate and the corresponding flow field plate body respectively The second communication opening is in communication with and forms a fuel flow passage, wherein both ends of each fuel passage of the flow field plate are respectively in communication with the fuel flow passage, so that fuel can pass through the flow field plate The fuel flow path is supplied to the membrane electrode assembly.
The flow field plate set according to claim 44, wherein both end portions of said support plate of each flow field plate are separately and sealingly disposed at both ends of said flow field plate to prevent Fuel leaks through a gap between the end of the support plate of the flow field plate and the end of the corresponding flow field plate.
The flow field plate set according to claim 41, wherein said first guide wall of each flow field plate is integrally formed with said flow field plate body and extends from said cathode side of said flow field plate body.
The flow field plate set according to claim 41, wherein said support plate of said flow field plate has a receiving groove, wherein said receiving groove has a shape and a size according to said second guiding wall of said flow field plate Provided to be able to accommodate the second guide wall of the flow field plate therein.
A flow field plate set according to claim 45, further comprising two seal rings, wherein said seal rings are respectively disposed at ends of said flow field plates of said flow field plates and corresponding said support plates Between the ends, wherein each sealing ring is disposed to surround the first communication opening of the support plate of the flow field plate and the second communication opening of the flow field plate, respectively, to Both ends of the support plate of the flow field plate are separately and sealingly disposed at both ends of the flow field plate.
The flow field plate set according to claim 47, wherein a depth of said receiving groove of said flow field plate of said flow field plate is the same as a height of said second guiding wall of said flow field plate, thereby The second guiding wall of the flow field plate can be adapted to be accommodated in the receiving groove of the flow field plate.
The flow field plate set according to claim 41, wherein a length of the first guiding wall of the flow field plate of the flow field plate is greater than a length of the second guiding wall of the flow field plate, To allow the support plate to be disposed on the first guide wall.
A flow field plate set according to claim 42, 43, 44, 45, 46, 47, 48, 49 or 50, wherein said support plate is made of a non-conductive rigid material.
A fuel cell, comprising:

At least one membrane electrode set; and

At least two flow field plates, wherein the membrane electrode sets are respectively disposed between adjacent two flow field plates, wherein each flow field plate comprises a flow field plate body, a set of first guide walls and a group of a guide wall, wherein the flow field plate has a cathode side and an anode side, wherein the flow field plate body has at least one fuel passage disposed on the anode side, wherein the first guide wall is phased Separatingly disposed on the cathode side of the flow field plate body, the second guiding walls respectively extending from the first guiding wall, such that two adjacent first guiding walls form one between the two a first fluid passage, and a corresponding adjacent two second guide walls forming a second fluid passage therebetween, wherein the first fluid passage is in communication with the second fluid passage, wherein each The first fluid passage has two first passages open Port, each of the second fluid passages has a second passage opening, wherein the anode side of the flow field plate of the previous flow field plate of the adjacent two flow field plates is disposed toward the adjacent two The membrane electrode assembly between the flow field plates such that fuel can be supplied to the membrane electrode assembly through the fuel passage, and the second fluid of the flow field plate of the latter flow field plate The second passage opening of the passage is disposed toward the membrane electrode set of the fuel cell such that the first fluid passage allows fluid to flow between the first passage openings of the fluid passage and through The second passage opening of the second fluid passage is provided to the membrane electrode set of the fuel cell.
A fuel cell according to claim 52, wherein each of said flow field plates further comprises a support plate, wherein said support plate is disposed at said first guide wall, wherein a previous one of adjacent two flow field plates The anode side of the flow field plate of the flow field plate forms a continuous sealing plane for sealing the membrane electrode assembly disposed between adjacent two flow field plates, the latter flow field plate One outer side of the support plate forms another continuous sealing plane for sealing the membrane electrode set disposed between adjacent two flow field plates to seal the membrane electrode assembly in two adjacent flow fields Between the boards.
A fuel cell according to claim 53, wherein said support plate forms a receiving groove, and wherein said support plate is accommodated in said first guide wall and said second guide wall of said flow field plate are accommodated The receiving groove of the support plate.
A fuel cell according to claim 53, wherein said support plate of each flow field plate has two first communication openings respectively provided at both ends of said support plate, said flow field plate having Two second communication openings respectively disposed at both ends of the flow field plate, wherein the first communication openings of the support plates are respectively corresponding to the corresponding ones of the flow field plates Two communication openings are in communication and forming a fuel flow passage, wherein both ends of each fuel passage of the flow field plate are respectively in communication with the fuel flow passage such that fuel can pass through the fuel of the flow field plate A flow channel is provided to the membrane electrode assembly.
A fuel cell according to claim 55, wherein both end portions of said support plate of each flow field plate are separately and sealingly disposed at both ends of said flow field plate to prevent fuel from passing through A gap between the end of the support plate of the flow field plate and the end of the corresponding flow field plate leaks.
A fuel cell according to claim 52, wherein said first guide wall of each flow field plate is integrally formed with said flow field plate body and extends from said cathode side of said flow field plate body.
A fuel cell according to claim 52, wherein said support plate of said flow field plate has a receiving groove, wherein said receiving groove is shaped and sized according to said second guiding wall of said flow field plate So that the second guiding wall of the flow field plate can be accommodated therein.
A fuel cell according to claim 56, further comprising two seal rings, wherein said seal ring Separately disposed between an end of the flow field plate of the flow field plate and an end of the corresponding support plate, wherein each seal ring is disposed to surround the support of the flow field plate The first communication opening of the plate and the second communication opening of the flow field plate such that both ends of the support plate of the flow field plate are separately and sealingly disposed at the The two ends of the flow field plate.
A fuel cell according to claim 58, wherein a depth of said accommodating groove of said flow field plate of said flow field plate is the same as a height of said second guide wall of said flow field plate, thereby The second guide wall of the flow field plate can be adapted to be accommodated in the receiving groove of the flow field plate.
A fuel cell according to claim 52, wherein said first guide wall of said flow field plate of said flow field plate has a length greater than a length of said second guide wall of said flow field plate to allow The support plate is disposed at the first guide wall.
A fuel cell according to claim 53, further comprising at least one gasket, wherein said gasket is a hollow structure, and a sealing portion of said gasket is disposed in said flow field plate of said previous flow field plate Between the circumference of the anode side and the continuous sealing plane of the support plate of the latter flow field plate, wherein the periphery of the membrane electrode set is disposed at a sealing portion of the gasket and a previous flow field Between the continuous sealing planes of the flow field plate of the plate such that the flow field plate of the previous flow field plate, the support plate of the latter flow field plate and the membrane electrode group form a Seal the space for fuel flow.
A fuel cell according to claim 62, wherein both ends of said gasket are respectively disposed at said end of said flow field plate of said previous flow field plate and said corresponding one of said subsequent flow field plates Between the ends of the support plate, wherein the gasket is disposed to surround the two second communication openings of the flow field plate of the previous flow field plate and the support plate of the latter flow field plate Two first communication openings such that when the fuel cell is assembled and the gasket is squeezed between the two flow field plates, the flow field plate and the latter flow of the previous flow field plate The support plates of the field plates are sealedly stacked one on another to prevent leakage of fuel from the gap between the flow field plate of the previous flow field plate and the support plate of the latter flow field plate.
A fuel cell according to claim 53, 54, 55, 56, 57, 58, 59, 60, 61, 62 or 63, wherein said support plate is made of a non-conductive rigid material.