TWM543473U - Bipolar plate structure with optimized gas duct - Google Patents

Description

Bipolar plate structure with optimized gas flow path

The present invention relates to a bipolar plate structure with an optimized gas flow path, in particular to a metal bipolar plate structure suitable for an anode electrode plate and an electrode plate of a fuel cell and having an innovative gas flow path design, which can effectively make fuel The fuel gas, the oxidant, and the coolant in the battery are evenly distributed on a specific gas flow path surface to improve the corrosion resistance, mechanical strength, and service life of the fuel cell of the metal bipolar plate.

According to the traditional petrochemical energy has been exhausted, and the use of petrochemical energy is likely to have a major impact on the ecological environment. Therefore, the development of low-pollution and high-efficiency energy use has long been an important issue for governments; Among the emerging emerging energy utilization methods, solar cells, biochemical energy sources, and fuel cells are more common, among which, the fuel cell is about 60% high in power generation efficiency and low pollution; the fuel cell system is a kind A power generation device that directly converts chemical energy into electrical energy. The fuel used may be methanol, ethanol, hydrogen or other hydrocarbons, and oxygen is used as an oxidant to generate electrical energy, and water is generated during the electrochemical reaction. It is a by-product of the reaction; compared with the conventional power generation method, the fuel cell has the advantages of low pollution, low noise, and high energy conversion efficiency, and since the fuel cell is directly generated by the oxidation of the fuel gas, the discharge current can be supplied along with the fuel supply. The amount increases and increases, as long as the fuel gas and oxygen are continuously supplied, it will be sustainable. Electric, so there is no power failure and charging problem, the Department of a highly prospective clean energy.

Basically, the composition of the fuel cell is mainly composed of a Membrane Electrode Assembly (MEA) and a two-electrode plate. The Membrane Electrode Assembly (MEA) is the core of the fuel cell and functions as an electrochemical reaction. Electrode plates are one of the key factors affecting the commercialization of fuel cells. There are many problems to be solved in the material, flow field structure or processing cost of electrode plates. The electrode plates used in practice are mainly graphite, composite carbon and metal. For materials such as graphite and composite carbon materials, although they have good electrical conductivity and corrosion resistance, they are complicated in process, time-consuming, and electrodes made of these materials. The thickness of the plate cannot be less than 3 mm, which is not conducive to the miniaturization of the fuel cell; for the electrode plate formed of the metal substrate, although the thickness is thin, the quality is light, and the volume and quality of the fuel cell can be reduced, however, Since the fuel gas system of the fuel cell is transported through the flow path of the electrode plate, the transport capacity of the flow channel also directly affects the power generation efficiency of the fuel cell.

One of the creators of this case, in the invention of the "fuel cell stack separator" of the Republic of China Patent Publication No. 201419644, clearly discloses that a partition plate of the same structure is used for the anode and cathode of the fuel cell, respectively, to reduce fuel. The manufacturing cost of the battery, and the arrow-shaped block formed by the gas flow channel, the fuel gas and the oxidant can be evenly distributed on the gas flow channel surface to improve the power generation efficiency of the fuel cell, and the structure of the structure is The partition plate has a gas flow passage surface formed by press forming, and a coolant flow passage surface corresponding to the gas flow passage surface, wherein the gas flow passage surface has a plurality of flow passages, and the flow passages have a plurality of bends, and The bending connecting line has a linear shape and a cluster shape, and the tip of the arrow cluster shape is located on the same horizontal plane, and when the two partition plates are joined by the coolant flow passage surface, the grooves of the two coolant flow passage surfaces are formed. a straight flow path for conveying a coolant; however, since the gas flow path designed by the invention has a plurality of bends, when a gas such as hydrogen of a fuel gas or an oxidant of an oxidant is in a gas flow path When the flow reactor, is easy because the flow passage has a plurality of bent increased gas flow resistance, thus reducing the efficiency of the fuel cell to generate electricity.

Today, the creator is in view of the gas flow path of the fuel cell stack separator mentioned above. The lack of gas flow resistance due to multiple bends, etc., is a tireless spirit, and is improved by its rich professional knowledge and years of practical experience, and based on this research creation.

The main purpose of the present invention is to provide a bipolar plate structure with an optimized gas flow path, in particular to a metal bipolar plate structure suitable for an anode electrode plate and an electrode plate of a fuel cell and having an innovative gas flow path design, which can effectively The fuel gas, the oxidant, and the coolant in the fuel cell are uniformly distributed on a specific gas flow path surface to improve the corrosion resistance, mechanical strength, and service life of the fuel cell of the metal bipolar plate.

In order to achieve the above-mentioned implementation object, the present author proposes a bipolar plate structure with an optimized gas flow path, comprising at least one anode electrode plate and a cathode electrode plate; the anode electrode plate has a gas flow path surface formed by press working. The gas flow channel surface has a plurality of grooves for supplying hydrogen gas corresponding to the opposite of the opposite depressions and the protrusions, and the groove is formed with a first gas flow path and a second gas flow path from a hydrogen inlet end toward a hydrogen outlet end. And a plurality of third gas flow paths between the first gas flow path and the second gas flow path; wherein the third gas flow path extends longitudinally by a distance, and then vertically flows out a first sub-flow path and a second sub-flow path, the first sub-flow path is further extended longitudinally by a distance, and a first female channel and a second sun channel are respectively flowed out laterally, and the second sub-flow channel extends longitudinally and then flows out one by one. The Sansun Runner Road and the No. 4 Sun Runway, the first Sun Runway and the Second Sun Runway are curved laterally and then merged into the first sub-flow path. The third Sun Runway and the Fourth Sun Runner are also laterally outward. After being bent, the second sub-flow path is merged, and after the first sub-flow path and the second sub-flow path are merged again, the hydrogen outlet end flows out; the first gas flow path extends longitudinally across the entire gas flow path surface, and then laterally a plurality of bending outwards, converging to the first sub-flow passage adjacent to the third gas flow passage, flowing out from the hydrogen outlet end; the second gas flow passage extending laterally and dividing a third sub-flow passage and a fourth sub-flow passage The third sub-flow channel extends a distance longitudinally and then flows out a fifth sun channel respectively. With the sixth solar channel, the fourth sub-flow channel is laterally separated from the seventh sun channel and the eighth sun channel, and the fifth sun channel and the sixth sun channel are curved laterally and then merged into a third sub-flow path. After the three sub-flow passages merge to the second sub-flow passage adjacent to the third gas flow passage, the third sub-flow passage flows out from the hydrogen outlet end, and the seventh grandchild flow passage and the eighth grandchild flow passage are also bent laterally inward, and then merged into the fourth sub-flow passage. The fourth sub-flow channel extends longitudinally from the entire gas flow channel surface, and flows out from the hydrogen outlet end, wherein the laterally distributed flow channel is in the shape of an arrow cluster, and the tip of the arrow cluster shape is on the same horizontal line; the cathode electrode plate system The utility model has a gas flow passage surface formed by press forming, wherein the gas flow passage surface has a plurality of grooves for supplying oxygen circulation corresponding to the opposite depressions and the protrusions, and the groove is formed by an oxygen inlet end toward an oxygen outlet end and a fourth portion. a gas flow passage, a fifth gas flow passage, and a plurality of sixth gas flow passages between the fourth gas flow passage and the fifth gas flow passage; wherein the fourth gas flow passage longitudinally extends the entire gas flow passage surface Further extending and splitting a fifth sub-flow passage and a sixth sub-flow passage, the fifth sub-flow passage and the sixth sub-flow passage are laterally bent outward, and are merged to the fourth gas flow passage, and then flow out from the oxygen outlet end. After the sixth gas flow channel extends longitudinally for a distance, a seventh sub-flow channel and an eighth sub-flow channel are respectively flowed out laterally, and the seventh sub-flow channel and the eighth sub-flow channel are bent laterally inwardly and converged to After the sixth gas flow path, the gas exits from the oxygen outlet end; the fifth gas flow path extends longitudinally for a distance, then passes through several bends laterally, and finally extends the entire gas flow passage surface longitudinally, and then flows out from the oxygen outlet end, wherein the lateral distribution The flow channel is in the shape of an arrow cluster, and the tip of the shape of the arrow cluster is on the same horizontal line; wherein the anode electrode plate and the cathode electrode plate are reversely overlapped, and the gas flow channel faces of the anode electrode plates which are attached to each other The gas flow channel surface of the cathode electrode plate forms a reflux groove for gas circulation, which is a hydrogen flow channel and an oxygen flow channel, and is also staggered to form a plurality of vacancies, and the vacancy system forms a coolant flow for the coolant to circulate. Road.

The bipolar plate structure with optimized gas flow channel as described above, wherein the anode electrode plate and the cathode electrode plate are respectively provided with corresponding coolant inlets at the center of both ends of the cathode electrode plate The passage, and the coolant flow out of the manifold, the coolant entering the manifold and the coolant outflow manifold are in communication with the vacancy.

The bipolar plate structure with optimized gas flow paths as described above, the coolant entering the manifold, and the coolant outflow manifold are further provided with a coolant inlet support and a coolant outlet support, respectively.

As described above, the bipolar plate structure with the optimized gas flow path, the anode electrode plate and the cathode electrode plate are made of a metal material.

The bipolar plate structure with optimized gas flow path as described above is made of stainless steel.

As described above, the bipolar plate structure with the optimized gas flow path has a plate thickness of between 0.1 mm (millimeter, mm) and 0.2 mm.

The bipolar plate structure with optimized gas flow paths as described above, the first gas flow path, the second gas flow path, and the third gas flow path have the same total length.

As described above, the bipolar plate structure having the optimized gas flow path, the fourth gas flow path, the fifth gas flow path, and the sixth gas flow path have the same total length.

As described above, the bipolar plate structure with the optimized gas flow path, one side of the anode electrode plate and the cathode electrode plate are further provided with a first quick connector and a second quick connector to provide measurement voltage and current usage.

Another object of the present invention is to provide a fuel cell by using an anode electrode plate and a cathode electrode plate as described above, which are formed by a plurality of fuel cell units connected in series, wherein the fuel cell unit comprises a conventional membrane electrode assembly. At least two sets of a reflow grooved bipolar plate with an anode electrode plate and a cathode electrode plate oppositely overlapping, and at least two sealing members, the two sides of the membrane electrode group are respectively provided with a sealing member and a group Reflow grooved bipolar plates.

In this way, the bipolar plate structure of the optimized gas flow path is designed by the anode. a first gas flow channel, a second gas flow path and a third gas flow path of the electrode plate, and a fourth gas flow path, a fifth gas flow path and a sixth gas flow path of the cathode electrode plate A large number of straight linear shapes and clusters of the shape of the cluster, in addition to help maintain the structural strength of the battery, the hydrogen gas of the fuel gas and the oxygen of the oxidant can be evenly and non-resistively distributed on the smooth straight gas flow surface, ensuring that the reaction gas has Sufficient concentration enters the membrane electrode assembly (MEA) to enable sufficient reaction of the fuel cell to improve the power generation efficiency of the fuel cell. In addition, the bipolar plate structure of the optimized gas flow path is made of metal. The stainless steel sheet press forming method forms a fuel gas flow path. Since the stainless steel sheet has the advantages of thin thickness and light weight, the volume of the fuel cell can be reduced, and the demand for light weight can be achieved, and the stainless steel sheet is subjected to coating treatment after molding. Or surface modification operation such as gas heat treatment, in order to improve the corrosion resistance of the metal plate and increase the mechanical strength, thereby improving the battery life. The purpose of the present invention is that the bipolar plate structure of the optimized gas flow path is formed by the vacancy of the opposite surface of the anode electrode plate and the cathode electrode plate to form a coolant flow path, so the contact point It must be enough to withstand the pressure of the fuel cell compression assembly, and increase the coolant flow path formed on the gas flow path surface of the anode electrode plate and the gas flow path surface of the cathode electrode plate by the gas flow channel confluence design. The largest area, while meeting the cooling needs and the advantages of providing higher weight power density.

(1)‧‧‧Anode electrode plate

(11) ‧‧‧ gas flow surface

(111)‧‧‧First gas flow path

(112)‧‧‧Second gas flow path

(1121)‧‧‧ Third sub-channel

(11211) ‧ ‧ Fifth Sun Runner

(11212) ‧‧‧ Sixth Sun Runner

(1122) ‧ ‧ fourth sub-runner

(11221) ‧‧ ‧ Seventh Sun Runner

(11222) ‧ ‧ Eighth Sun Runner

(113)‧‧‧ Third gas flow path

(1131)‧‧‧First sub-channel

(11311) ‧‧‧First Sun Runner

(11312) ‧‧‧Second Sun Runner

(1132) ‧‧‧Second sub-channel

(11321) ‧ ‧ Third Sun Runner

(11322) ‧ ‧ Fourth Sun Runner

(114)‧‧‧Bend

(12) ‧‧‧ trench

(13) ‧‧‧ Hydrogen inlet end

(14) ‧‧‧ Hydrogen outlet

(15) ‧ ‧ cutting edge

(16) ‧‧‧ coolant enters the lane

(161) ‧‧‧ coolant inlet support

(17) ‧‧‧ coolant outflow manifold

(171) ‧‧‧ coolant outlet support

(18)‧‧‧First quick connector

(19) ‧‧‧ Hydrogen intake manifold

(2) ‧‧‧cathode electrode plate

(21) ‧‧‧ gas flow surface

(211) ‧‧‧fourth gas flow path

(2111)‧‧‧ fifth sub-flow path

(2112) ‧‧‧ sixth sub-channel

(212) ‧‧‧ fifth gas flow path

(213) ‧‧‧ sixth gas flow path

(2131)‧‧‧ seventh sub-flow path

(2132) ‧‧‧ eighth sub-channel

(214)‧‧‧Bend

(22) ‧‧‧ trench

(23)‧‧‧Oxygen inlet end

(24) ‧‧‧Oxygen outlet

(25) ‧ ‧ cutting edge

(26)‧‧‧Second quick connector

(3) ‧‧‧ Hydrogen flow path

(4) ‧‧‧Oxygen flow path

(5) ‧ ‧ vacancies

(6) ‧‧‧ coolant flow path

(7)‧‧‧ fuel cell unit

(71) ‧‧‧Thin electrode group

(72) ‧‧‧Reflux recessed bipolar plates

(73)‧‧‧Seal

First: a top view of an anode electrode plate structure of a preferred embodiment of a bipolar plate structure with optimized gas flow paths

The second figure: a top view of a cathode electrode plate structure of a preferred embodiment of the bipolar plate structure with optimized gas flow path

The third figure: a bipolar plate stacking diagram of a preferred embodiment of the bipolar plate structure with optimized gas flow path

Figure 4: This is a preferred implementation of a bipolar plate structure with optimized gas flow paths. Example of coolant flow path

Figure 5: Schematic diagram of a gas ramp inlet of a preferred embodiment of a bipolar plate structure with optimized gas flow paths

Fig. 6 is a schematic diagram showing the stacking of fuel cell units of a preferred embodiment of the bipolar plate structure with optimized gas flow paths

Figure 7: Schematic diagram of a fuel cell structure of a preferred embodiment of a bipolar plate structure with optimized gas flow paths

Figure 8 is a schematic cross-sectional view of a fuel cell unit of a preferred embodiment of a bipolar plate structure with optimized gas flow paths

The purpose of this creation and the advantages of its structural design function will be explained in accordance with the preferred embodiment shown in the following figures, so that the reviewing committee can have a deeper and more specific understanding of the creation.

First, the main function of the electrode plate of the fuel cell is to direct the reaction gas such as hydrogen gas of the fuel gas and oxygen of the oxidant from the oxygen inlet end (13) of the anode electrode plate (1) and the oxygen inlet end of the cathode electrode plate (2), respectively. (23) entering the flow channel, and guiding the coolant from the coolant into the manifold (16) into the back flow channel located at the anode electrode plate (1) and the cathode electrode plate (2), and the hydrogen is designed by the innovative flow channel design And the oxygen is distributed in the reaction area, and the unused reaction gas and the coolant are guided and discharged by the flow channel, and the anode electrode plate (1) and the cathode electrode plate (2) are disposed at the two side ends of the film electrode group, The principle of operation is that the hydrogen of the fuel gas enters the fuel cell from the anode electrode plate (1), and the oxygen of the oxidant enters the fuel cell from the cathode electrode plate (2), and the hydrogen molecules of the anode fuel gas are caused by the reaction of the thin film electrode group. Decomposed into two protons and two electrons, in which protons are attracted to the cathode by oxygen, electrons form current through an external circuit and then reach the cathode, while protons, oxygen and electrons react at the cathode to form water molecules, fuel Works pool known as the study of knowledge is well known in the art, and is not a focus of creation, this will not Furthermore, the technical features of this creation focus on the arrangement and arrangement of the runner shape of the metal bipolar plate to solve the problem that the reaction gases such as hydrogen and oxygen encountered by the creator's previous invention are not uniformly distributed without resistance. The disadvantages of the gas flow channel surface (11) of the anode electrode plate (1) and the gas flow channel surface (21) of the cathode electrode plate (2); further, please refer to the first and second figures to optimize the creation tool. The bipolar plate structure of the gas flow path is a top view of the anode electrode plate structure of a preferred embodiment, and the top view of the cathode electrode plate structure, wherein the bipolar plate structure of the optimized gas flow path comprises at least: An anode electrode plate (1) has a gas flow path surface (11) formed by press working, and the gas flow path surface (11) has a plurality of grooves for supplying hydrogen gas flow corresponding to alternating opposite depressions and protrusions (12). The trench (12) is formed by a hydrogen inlet end (13) toward a hydrogen outlet end (14) having a first gas flow path (111), a second gas flow path (112), and a plurality of a third gas flow path (113) between the gas flow path (111) and the second gas flow path (112); wherein the third gas flow path (113) extends longitudinally a distance, and then vertically flows out one by one A sub-flow channel (1131) and a second sub-flow channel (1132), the first sub-flow channel (1131) further extends a distance longitudinally, and then laterally flow out a first grandchild channel (11311) and a second grandchild channel (11312). And the second sub-flow passage (1132) extends longitudinally for a distance, and laterally flows out a third grandchild channel (11321) and a fourth grandchild channel (11322), a first grandchild channel (11311) and a second grandchild channel (11312). After several bends (114) laterally outward, it merges into the first sub-flow passage (1131), and the third grandchild flow passage (11321) and the fourth grandchild flow passage (11322) are also bent laterally outward. After (114), the second sub-flow channel (1132) is merged, and the first sub-flow channel (1131) and the second sub-flow channel (1132) are merged again, and then flow out from the hydrogen outlet end (14); the first gas The flow passage (111) extends longitudinally across the entire gas flow passage surface (11), and then laterally outwardly bends (114), and merges to the first sub-flow passage (1131) adjacent to the third gas flow passage (113). The hydrogen outlet end (14) flows out; the second gas flow passage (112) extends laterally and divides a third sub-flow passage (1121) and a fourth sub-flow passage (1122), and the third sub-flow passage (1121) After extending a distance in the longitudinal direction, a fifth grandchild stream flows out in the horizontal direction. Road (11211) and a sixth grandchild channel (11212), the fourth sub-flow channel (1122) is laterally separated from a seventh grandchild channel (11221) and an eighth grandchild channel (11222), a fifth grandchild channel (11211) and a sixth Sun Rundao (11212) is laterally outwardly curved (114) and then merged into a third sub-flow passage (1121). The third sub-flow passage (1121) is merged to a second adjacent third gas flow passage (113). After the sub-flow channel (1132), the hydrogen outlet port (14) flows out, and the seventh sun channel (11221) and the eighth sun channel (11222) are also bent laterally (114) laterally, and then merged into the fourth sub-flow channel. (1122), the fourth sub-flow passage (1122) extends longitudinally across the entire gas flow passage surface (11) and flows out from the hydrogen outlet end (14), wherein the laterally distributed flow passages are in the shape of an arrow cluster, and the same The tip of the arrow cluster shape (15) is located on the same horizontal line; in addition, it is worth noting that the laterally distributed gas flow path is judged inward or outward by a plurality of curves (114) in such a manner that the gas flow path flows out in the direction in which the gas flow path flows out. The normal vector is distinguished. The gas flow path that is close to the normal vector of the gas flow path is called "inward" bending, and the normal vector away from the gas flow path. The gas flow path is referred to as "outward" bending; further, in a preferred embodiment of the present invention, there are four third lines between the first gas flow path (111) and the second gas flow path (112). a gas flow path (113), and the first gas flow path (111), the second gas flow path (112), and the third gas flow path (113) have the same total length for each gas flow path The resistances are all similar; it is worth noting here that the number of gas flow paths is only a preferred embodiment. After reading and understanding the teachings of the present creation, those skilled in the art know that the third gas flow path of the creation ( 113) may be less than 4 or more than 4, and will not affect the actual implementation of the creation; A cathode electrode plate (2) has a gas flow passage surface (21) formed by press working, and the gas flow passage surface (21) has a plurality of grooves for supplying oxygen flow corresponding to the opposite depressions and projections. The groove (22) is formed by an oxygen inlet end (23) toward an oxygen outlet end (24), a fourth gas flow path (211), a fifth gas flow path (212), and a plurality of a sixth gas flow path (213) between the fourth gas flow path (211) and the fifth gas flow path (212); wherein the fourth gas flow path (211) extends longitudinally throughout the gas flow path The surface (21) extends laterally and divides a fifth sub-flow passage (2111) and a sixth sub-flow passage (2112), and the fifth sub-flow passage (2111) and the sixth sub-flow passage (2112) are laterally outward. a plurality of bends (214), after flowing to the fourth gas flow passage (211), flowing out from the oxygen outlet end (24); the sixth gas flow passage (213) extends longitudinally for a distance, and then flows out a seventh sub-segment The flow channel (2131) and the eighth sub-flow channel (2132), the seventh sub-flow channel (2131) and the eighth sub-flow channel (2132) are laterally curved (214) laterally, and merged to the sixth gas flow channel. After (213), it flows out from the oxygen outlet end (24); the fifth gas flow path (212) extends longitudinally a distance, then passes through several bends (214) laterally, and finally extends the entire gas flow passage surface (21) longitudinally. And flowing out from the oxygen outlet end (24), wherein the laterally distributed flow channels are in the shape of an arrow cluster, and the tip of the arrow cluster shape (25) is on the same horizontal line; in a preferred embodiment of the present invention, There are nine sixth gas flow paths (213) between the fourth gas flow path (211) and the fifth gas flow path (212), and the fourth gas flow path (211) and the fifth gas flow path (212), And a sixth gas flow path (213) Having the same total length, so that the resistance of each gas flow path is similar; it is worth noting that the number of gas flow paths is only a preferred embodiment thereof, and after reading and understanding the teachings of the present invention, it is cooked. The skilled person knows that the number of the sixth gas flow passages (213) of the present creation may be less than nine or more than nine, and does not affect the actual implementation of the creation.

In addition, the anode electrode plate (1) and the cathode electrode plate (2) are reversibly overlapped, and the gas flow path (11) and the cathode electrode plate (2) of the anode electrode plate (1) which are attached to each other are attached. The gas flow channel surface (21) forms a reflux groove for gas circulation, which is a hydrogen flow channel (3) and an oxygen flow channel (4), and also forms a plurality of vacancies (5), and vacancies (5) Forming a coolant flow path (6) for the coolant to flow, please refer to the third and fourth figures together, which is a bipolar plate of a preferred embodiment of the bipolar plate structure for optimizing the gas flow path. A schematic diagram of the superposition, and a schematic diagram of the coolant flow path, wherein the third figure shows the superposition of the anode electrode plate (1) and the cathode electrode plate (2), and the anode electrode plate (1) is inverted up and down by 180 degrees and overlapped. Above the cathode electrode plate (2), the fourth figure shows the gas using the anode electrode plate (1). The back surface of the gas flow surface (21) of the flow channel surface (11) and the cathode electrode plate (2), that is, the outer side of the anode electrode plate (1) and the cathode electrode plate (2), when the anode electrode plate (1) and When the outer sides of the cathode electrode plates (2) are superposed on each other, a barrier is formed in the place where the electrode plates are in contact with the electrode plates, and a non-contact vacancy (5) generates a liquid flow in which the channels provide a coolant, that is, a so-called coolant flow path. (6) This is also the reason why the lateral gas flow path is designed as the shape of the arrow cluster, that is, the grid-like space generated by laminating the anode electrode plate (1) and the cathode electrode plate (2) can be used as cooling. In addition, the coolant flow field is expected to reach the maximum area to improve the cooling effect, and the contact point must also be enough to withstand the pressure of the fuel cell compression assembly, so the anode electrode plate (1) and the cathode electrode Metal bipolar plates such as plates (2) have a flexible and delicate design that can meet both cooling requirements and provide high weight power density. In addition, the anode electrode plate (1) and the cathode electrode plate (2) are at the center of both sides. Each of the departments is provided with a corresponding coolant entering the lane (16) to The coolant flows out of the manifold (17), the coolant entering the channel (16) and the coolant outflow channel (17) are in communication with the coolant channel (6) forming the void (5) to provide coolant ingress, and The coolant enters the manifold (16), and the coolant outflow manifold (17) is further provided with a coolant inlet support (161) and a coolant outlet support (171), respectively.

Furthermore, please refer to the fifth figure, which is a cross-sectional view of a gas channel inlet of a preferred embodiment of the bipolar plate structure with optimized gas flow path, wherein the anode electrode plate (1) and the cathode are shown. When the electrode plate (2) is reversely superposed, the hydrogen of the fuel gas enters from the hydrogen inlet end (13) and enters through the gap between the hydrogen inlet manifold (19) and the cathode electrode plate (2) below. The gas flow path surface (11) of the anode electrode plate (1), and the path indicated by the black arrow in the fifth figure, is the route traveled by the hydrogen gas of the fuel gas.

In addition, the anode electrode plate (1) and the cathode electrode plate (2) are made of a metal material, and the best metal material is a stainless steel plate, and the thickness of the plate is between 0.1 mm and 0.2 mm, and the optimum system is 0.15mm, and the total area of the metal bipolar plates such as the anode electrode plate (1) and the cathode electrode plate (2) is 202.7 cm 2 , and the flow channel elongation is 0.5 mm, and the flow path width is The system was 1 mm and the total reaction area was 132 cm2.

Furthermore, one side of the anode electrode plate (1) and the cathode electrode plate (2) are further provided with a first quick connector (18) and a second quick connector (26) to provide measurement voltage and current usage.

In addition, please refer to the sixth and seventh figures, which are schematic diagrams of fuel cell unit stacking according to a preferred embodiment of the bipolar plate structure with optimized gas flow path, wherein the present invention further provides a fuel cell. The fuel cell is formed by a plurality of fuel cell units (7) connected in series, wherein the fuel cell unit (7) comprises a conventional membrane electrode assembly (71), at least two groups of an anode electrode plate (1) and a The cathode electrode plate (2) reverses the oppositely laminated return groove bipolar plate (72), and at least two sealing members (73), and the two sides of the film electrode group (71) are respectively provided with a sealing member ( 73) with a set of recirculating groove bipolar plates (72), the anode electrode plates (1) and the cathode electrode plates (2) are taken from the above-mentioned bipolar plate structure with optimized gas flow paths; For the purpose of creating a bipolar plate structure with optimized gas flow path, a cross-sectional view of a fuel cell unit of the preferred embodiment, which is a portion of the oxygen inlet end (23), an anode electrode plate (1) and a cathode electrode plate (2) The laminated back-flow bipolar plate (72) has a return groove for gas circulation, that is, a Flow channel (3) and an oxygen flow channel (4), that is, an arrow indicates the flow direction of oxygen into the inlet end and the sealing member (73) will complete adhesion to prevent gas leakage.

According to the above-mentioned bipolar plate structure with optimized gas flow path, in practice, first, the anode electrode plate (1) and the cathode electrode plate (2) of the present invention are made of metal material, and the best metal material is The thickness of stainless steel plate and stainless steel plate is between 0.1mm~0.2mm, the best system is 0.15mm, the total area is 202.7cm2, the flow channel elongation is 0.5mm, and the flow channel width is 1mm. The reaction area is 132 cm2, and the processing method is to press out the desired gas flow path by press forming; the practical application of the fuel cell is to connect a plurality of fuel cell units (7) in series to form a fuel cell to obtain sufficient power generation. In the fuel cell unit (7), the anode electrode plate (1) The cathode electrode plate (2) is reversely overlapped, and the gas flow path surface (11) of the anode electrode plate (1) and the gas flow path surface (21) of the cathode electrode plate (2) are formed. The return groove for gas circulation is a hydrogen flow channel (3) and an oxygen flow channel (4), which are also interlaced to form a plurality of vacancies (5), and the vacancy (5) forms a coolant for coolant circulation. The flow channel (6), that is, the gas flow channel surface (11) of the anode electrode plate (1) and the gas flow channel surface (21) of the cathode electrode plate (2), that is, the anode electrode plate (1) and On the outer side of the cathode electrode plate (2), when the outer sides of the anode electrode plate (1) and the cathode electrode plate (2) overlap each other, a barrier is formed in the place where the electrode plate contacts the electrode plate, and a non-contact vacancy (5) The channel provides a liquid flow of the coolant, which is the so-called coolant flow path (6), which is also the reason why the lateral gas flow path is designed as an arrow cluster shape, that is, the anode electrode plate (1) and the cathode electrode plate ( 2) The grid-like space generated after the superposition can be used as a passage for the coolant to flow, and the coolant flow field is expected to reach the maximum area as much as possible to improve the cooling effect. At the same time, the contact point must also be enough to withstand the pressure of the fuel cell compression assembly. Therefore, the metal bipolar plate system such as the anode electrode plate (1) and the cathode electrode plate (2) has a flexible and delicate design, which can simultaneously meet the cooling demand and Providing a higher weight power density; the anode electrode plate (1) has six gas flow paths, that is, the first gas flow path (111) except the uppermost end and the second gas flow path (112) at the lowermost end, There are four third gas flow paths (113) between the first gas flow path (111) and the second gas flow path (112), and the first gas flow path (111) and the second gas flow path (112), And the third gas flow path (113) has the same total length, so that the resistance of each gas flow path is similar; the cathode electrode plate (2) has 11 gas flow paths, that is, the uppermost The fifth gas flow path (212) at the lowermost end of the four gas flow path (211) has nine sixth gas flow paths (213) in the fourth gas flow path (211) and the fifth gas flow path (212), and The fourth gas flow path (211), the fifth gas flow path (212), and the sixth gas flow path (213) have the same total length, so that the resistance of each gas flow path is Similarly, the anode electrode plate (1) and the cathode electrode plate (2) of the bipolar plate structure with optimized gas flow path can be combined with a conventional film electrode assembly (71) and a sealing member (73). Forming a fuel cell unit (7), wherein the anode electrode plate (1) and the cathode electrode plate (2) plate are first reversely overlapped to form a recirculating groove bipolar plate (72) having a hydrogen flow for gas circulation The channel (3) and the oxygen flow channel (4) are sequentially provided with a sealing member (73) and a set of recirculating groove bipolar plates (72) on both side ends of the membrane electrode assembly (71), by means of a seal ( 73) Avoid gas leakage, and a plurality of fuel cell units (7) are connected in series to form a fuel cell.

It can be seen from the above description that the present invention has the following advantages in comparison with the prior art in the bipolar plate structure with optimized gas flow path:

1. The bipolar plate structure of the optimized gas flow path is composed of a first gas flow channel, a second gas flow path and a third gas flow path of the anode electrode plate, and a cathode electrode plate The plurality of straight straight lines and the shape of the arrow cluster formed by the four gas flow channels, the fifth gas flow path and the sixth gas flow path, in addition to helping to maintain the structural strength of the battery, the hydrogen of the fuel gas and the oxygen of the oxidant can be It is evenly and non-resistively distributed on the smooth and straight gas flow path surface, ensuring that the reaction gas has a sufficient concentration to enter the membrane electrode group, so that the fuel cell can fully react, thereby improving the power generation efficiency of the fuel cell.

2. The bipolar plate structure with optimized gas flow path is formed by forming a fuel gas flow path by forming a stainless steel plate of metal material. Since the stainless steel plate has the advantages of thin thickness and light weight, the fuel can be reduced. The volume of the battery can also meet the demand of light weight, and the stainless steel plate will undergo surface modification operations such as coating treatment or gas heat treatment after molding, thereby improving the corrosion resistance of the metal plate and increasing the mechanical strength, thereby achieving the purpose of improving the service life of the battery. .

3. The bipolar plate structure with optimized gas flow path of the present invention forms a hydrogen flow channel and an oxygen flow channel for gas circulation by reversing the opposite surface of the anode electrode plate and the cathode electrode plate, and is also formed by vacancies. It is the coolant flow channel, so the joint must be enough to withstand the pressure of the fuel cell compression assembly, and the gas flow path surface of the anode electrode plate and the cathode electrode plate are increased by the gas flow channel confluence design. Runway face back The maximum area of the coolant flow path formed by the face meets both the cooling demand and the advantage of providing a higher weight power density.

In summary, the bipolar plate structure with optimized gas flow path can achieve the intended use efficiency by the above disclosed embodiments, and the creation has not been disclosed before the application, and has been fully met. The provisions and requirements of the Patent Law. If you apply for a new type of patent in accordance with the law, you are welcome to review it and grant a patent.

However, the illustrations and descriptions disclosed above are only preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention; those who are familiar with the skill are otherwise characterized by the scope of the creation. Equivalent changes or modifications shall be considered as not departing from the design of this creation.

(1)‧‧‧Anode electrode plate

(11) ‧‧‧ gas flow surface

(111)‧‧‧First gas flow path

(112)‧‧‧Second gas flow path

(1121)‧‧‧ Third sub-channel

(11211) ‧ ‧ Fifth Sun Runner

(11212) ‧‧‧ Sixth Sun Runner

(1122) ‧ ‧ fourth sub-runner

(11221) ‧‧ ‧ Seventh Sun Runner

(11222) ‧ ‧ Eighth Sun Runner

(113)‧‧‧ Third gas flow path

(1131)‧‧‧First sub-channel

(11311) ‧‧‧First Sun Runner

(11312) ‧‧‧Second Sun Runner

(1132) ‧‧‧Second sub-channel

(11321) ‧ ‧ Third Sun Runner

(11322) ‧ ‧ Fourth Sun Runner

(114)‧‧‧Bend

(12) ‧‧‧ trench

(13) ‧‧‧ Hydrogen inlet end

(14) ‧‧‧ Hydrogen outlet

(15) ‧ ‧ cutting edge

(16) ‧‧‧ coolant enters the lane

(161) ‧‧‧ coolant inlet support

(17) ‧‧‧ coolant outflow manifold

(171) ‧‧‧ coolant outlet support

(18)‧‧‧First quick connector

Claims (10)

A bipolar plate structure with an optimized gas flow path includes at least: an anode electrode plate having a gas flow path surface formed by press forming, the gas flow path surface having a plurality of corresponding opposite depressions and protrusions a groove for supplying hydrogen gas, the groove is formed with a first gas flow path, a second gas flow path from a hydrogen inlet end toward a hydrogen outlet end, and a plurality of grooves between the first gas flow path and the first a third gas flow passage between the two gas flow passages; wherein the third gas flow passages extend longitudinally for a distance, and then vertically divide a first sub-flow passage and a second sub-flow passage, the first sub-flow passage After the flow path is extended longitudinally by a distance, a first female channel and a second sun channel are respectively flowed out laterally, and the second sub-flow channel extends longitudinally for a distance, and then flows out a third solar channel and a fourth sun channel respectively. The first grandchild flow channel and the second grandchild flow channel are bent laterally outward, and then merged into the first sub-flow passage. The third grandchild flow channel and the fourth grandchild flow channel are also bent laterally outward, and then merged into the second sub-flow. Runner, After the first sub-flow channel and the second sub-flow channel recombine, the hydrogen gas outlet end flows out; the first gas flow channel extends longitudinally across the entire gas flow channel surface, and then laterally bends outward to merge into the adjacent gas After the first sub-flow path of the three gas flow path, the hydrogen gas outlet end flows out; the second gas flow path extends laterally and divides a third sub-flow path and a fourth sub-flow path, the third sub-flow path After extending a distance in the longitudinal direction, the lateral flow out of a fifth grandchild flow channel and a sixth sun flow channel, the fourth sub-flow channel is laterally separated from a seventh grandchild flow channel and an eighth grandchild flow channel, and the fifth grandchild flow channel and the sixth grandchild flow channel are bent laterally outward, and then merged into the third sub-flow After the third sub-flow path is merged into the second sub-flow path adjacent to the third gas flow path, the hydrogen outlet end flows out, and the seventh-side female flow channel and the eighth-side female flow channel are also bent laterally inwardly. And re-converge into the fourth sub-flow passage, the fourth sub-flow passage extends longitudinally from the entire gas flow passage surface, and flows out from the hydrogen outlet end, wherein the laterally distributed flow passages are in the shape of an arrow cluster, and the same The tip of the arrow cluster shape is located on the same horizontal line; and a cathode electrode plate has a gas flow path surface formed by press working, and the gas flow path surface has a plurality of oxygen flow distributions corresponding to alternating opposite depressions and protrusions. a groove formed by an oxygen inlet end toward an oxygen outlet end, a fourth gas flow path, a fifth gas flow path, and a plurality of lines between the fourth gas flow path and the fifth gas flow path Sixth gas a fourth gas flow path extending longitudinally across the entire gas flow channel surface, and then extending laterally and dividing a fifth sub-flow channel and a sixth sub-flow channel, the fifth sub-flow channel and the sixth sub-flow The road is bent laterally outwards, and flows to the fourth gas flow passage, and flows out from the oxygen outlet end; the sixth gas flow passages extend longitudinally a distance, and then flow out a seventh sub-flow passage and an eighth. a sub-flow passage, the seventh sub-flow passage and the eighth sub-flow passage are curved laterally inwardly, and flow to the sixth gas flow passage, and then flow out from the oxygen outlet end; the fifth gas flow passage extends longitudinally by a distance After that, go through several bends in the horizontal direction, most Extending longitudinally the entire gas flow channel surface, and then flowing out from the oxygen outlet end, wherein the laterally distributed flow channels are in the shape of an arrow cluster, and the tip of the arrow cluster shape is on the same horizontal line; wherein the anode electrode plate The cathode electrode plate is reversely overlapped, and the gas flow path surface of the anode electrode plate and the gas flow path surface of the cathode electrode plate form a return groove for gas circulation, which is a hydrogen flow path and An oxygen flow path is also interleaved to form a plurality of vacancies which form a coolant flow path through which the coolant circulates. The bipolar plate structure with optimized gas flow path according to claim 1, wherein the anode electrode plate and the central end of the cathode electrode plate are respectively provided with corresponding coolant entering channels, and The coolant flows out of the manifold, the coolant entering the manifold and the coolant outflow manifold being in communication with the voids. A bipolar plate structure having an optimized gas flow path as described in claim 2, wherein the coolant enters the manifold, and the coolant outflow manifold is further provided with a coolant inlet support and a coolant, respectively. Export support. The bipolar plate structure with optimized gas flow path as described in claim 2, wherein the anode electrode plate and the cathode electrode plate are made of a metal material. A bipolar plate structure having an optimized gas flow path as described in claim 4, wherein the metal material is stainless steel. The bipolar plate structure with optimized gas flow path as described in claim 4, wherein the plate thickness of the anode electrode plate and the cathode electrode plate is between 0.1 mm and 0.2 mm. A bipolar plate structure having an optimized gas flow path as described in claim 1, wherein the first gas flow path, the second gas flow path, and the third gas flow path have the same total length . A bipolar plate structure having an optimized gas flow path as described in claim 1, wherein the fourth gas flow path, the fifth gas flow path, and the sixth gas flow path have the same total length . The bipolar plate structure with the optimized gas flow path according to the first aspect of the invention, wherein the anode electrode plate and one side of the cathode electrode plate are further provided with a first quick connector and a second quick connector. To provide measurement voltage and current usage. A fuel cell is formed by a plurality of fuel cell units connected in series, wherein the fuel cell unit comprises a conventional membrane electrode assembly, and at least two groups are reflowed in opposite directions by an anode electrode plate and a cathode electrode plate. a grooved bipolar plate, and at least two sealing members, wherein the two sides of the film electrode assembly are respectively provided with the sealing member and a set of the recirculating groove bipolar plates, the anode electrode plate and the cathode electrode plate A bipolar plate structure having an optimized gas flow path as described in any one of claims 1 to 9.