Novel fuel cell test fixture

Abstract

The utility model discloses a novel fuel cell test fixture, which relates to the technical field of cell test fixtures and specifically comprises an anode collector plate and a cathode collector plate, gas pipeline connectors are respectively arranged on two sides of the anode collector plate and the cathode collector plate, and one gas pipeline connector is an inlet; the anode flow field plate and the cathode flow field plate are located between the anode collector plate and the cathode collector plate, the anode flow field plate is located on the side face of the anode collector plate, the cathode flow field plate is located on the side face of the cathode collector plate, and the surface of the anode flow field plate and the surface of the cathode flow field plate are each provided with two first air ports. In the application process, the heating sheets are arranged among the end plates, the insulating plates and the collector plates and are tightly attached to the cathode and anode collector plates, so that rapid temperature rise is achieved; meanwhile, the phenomena of air shortage and water logging of the membrane electrode are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing fixtures, in particular to a novel fuel cell testing fixture. Background Art

[0002] In the prior art, the electrical performance test and calculation of proton exchange membrane fuel cells by using a fixture cannot truly reflect the performance of proton exchange membrane fuel cells. The influencing factors are as follows:

[0003] 1. Existing fixtures use non-fixed fastening bolts to assemble proton exchange membrane fuel cells. The assembly relies on the "fixed-moving method" fastening operation, which is complicated and requires a high pre-tightening force to ensure good contact between the seal of the proton exchange membrane fuel cell and the flow field plate. However, it is not possible to control the compression rate of the membrane electrode well, resulting in a large error in the performance test of the proton exchange membrane fuel cell. This method will cause serious mechanical damage to the outside of the two end plates. In addition, this fixing method is easy to loosen after long-term use, and there is a high risk of leakage.

[0004] 2. The existing fixture heats by attaching a heating plate to the outside of the end plate. The cathode and anode gases directly enter the flow field plate from the pipeline to participate in the reaction. This heating method and gas transmission process easily cause the humidified gas to condense and block the flow channel, resulting in insufficient gas in the membrane electrode and flooding of the membrane electrode. In addition, this heating method is slow, inefficient, and cannot truly feedback the gas reaction temperature inside the membrane electrode. If the indoor ambient temperature fluctuates greatly, the test conditions will also be affected, ultimately resulting in inaccurate test results. Based on the above problems, we propose a new fuel cell test fixture. Utility Model Content

[0005] In view of the deficiencies existing in the above-mentioned background technology, the present invention proposes a novel fuel cell test fixture to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a new fuel cell test fixture, comprising:

[0007] An anode collector plate and a cathode collector plate, gas pipeline connectors are respectively provided on both sides of the anode collector plate and the cathode collector plate, the gas pipeline connectors on both sides are arranged at different heights, one gas pipeline connector is an inlet, and the other gas pipeline connector is an outlet, two second gas ports are respectively provided on the opposite surfaces of the anode collector plate and the cathode collector plate, and the second gas ports are respectively located on one side of the gas pipeline connector and the two are connected;

[0008] An anode flow field plate and a cathode flow field plate, both of which are located between the anode collector plate and the cathode collector plate, the anode flow field plate is located on the side of the anode collector plate, and the cathode flow field plate is located on the side of the cathode collector plate, and two first gas ports corresponding to the second gas ports are respectively provided on the surfaces of the anode flow field plate and the cathode flow field plate;

[0009] A cathode insulating plate and an anode insulating plate, wherein a square opening is provided in the middle of the cathode insulating plate and the anode insulating plate, a heating plate is placed in the square opening 9, the cathode insulating plate is arranged on the side of the cathode collector plate away from the anode collector plate, and the anode insulating plate is arranged on the side of the anode collector plate away from the cathode collector plate;

[0010] A cathode end plate and an anode end plate, the cathode end plate and the anode end plate are located at the outermost side of the fuel cell test fixture, the cathode end plate is connected to the side of the cathode insulating plate, and the anode end plate is connected to the side of the anode insulating plate;

[0011] Among them, the cathode end plate, cathode insulating plate, cathode collector plate, cathode flow field plate, anode end plate, anode insulating plate, anode collector plate and anode flow field plate are stacked on each other and fastened at the edges by a plurality of bolts.

[0012] Preferably, one side of the cathode insulating plate and the anode insulating plate is provided with an opening communicating with the square port, and the wires connected to the heating plate are distributed in the opening.

[0013] Preferably, a rubber strip is provided at the edge of the first air port.

[0014] Preferably, detection holes extending radially toward the center of the anode flow field plate and the cathode flow field plate are provided on the sides thereof, and the depth of the detection holes is one quarter of the length of the anode flow field plate and the cathode flow field plate.

[0015] Preferably, the anode flow field plate and the cathode flow field plate are both made of graphite.

[0016] Preferably, the cathode end plate and the anode end plate are both made of FR-epoxy resin.

[0017] Preferably, the cathode insulating plate and the anode insulating plate are both made of FR-epoxy resin.

[0018] Preferably, the anode collector plate and the cathode collector plate are both made of gold-plated copper.

[0019] Compared with the prior art, during the application of the utility model, the heating plate is built into the end plate, the insulating plate and the collector plate, close to the anode and cathode collector plates, so as to achieve the purpose of rapid heating and effective temperature control; the anode and cathode air inlet and outlet are designed on the collector plate, and the gas flows through the pipeline first through the collector plate with constant temperature and then to the flow field plate, and finally is transported to the catalyst layer to participate in the reaction, thereby reducing the condensation of the gas during transportation and reducing the water flooding and gas shortage of the membrane electrode during the reaction; the "up-in and down-out" design of the reaction gas is conducive to blowing out the water produced by the membrane electrode reaction, effectively reducing the gas shortage and water flooding of the membrane electrode; it can increase contact, reduce contact resistance, produce a higher inlet and outlet pressure difference, quickly discharge the reacted liquid water, the gas transmission is good and evenly distributed, and the reaction is more complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of one side of the explosive structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the other side of the explosive structure of the utility model.

[0022] Figure 3 This is a complete structural diagram of the utility model. Figure 1 .

[0023] Figure 4 This is a complete structural diagram of the utility model. Figure 2 .

[0024] In the figure: 1, cathode end plate; 2, cathode insulating plate; 3, cathode collector plate; 4, cathode flow field plate; 5, anode end plate; 6, anode insulating plate; 7, anode collector plate; 8, anode flow field plate; 9, square opening; 10, opening; 11, second gas port; 12, first gas port; 13, gas pipeline connector; 14, detection hole. Implementation

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figures 1 to 4 The utility model provides a technical solution: a new fuel cell test fixture, which includes two parts, the first part includes a cathode end plate 1, a cathode insulating plate 2, a cathode collector plate 3, and a cathode flow field plate 4; the second part includes an anode end plate 5, an anode insulating plate 6, an anode collector plate 7, and an anode flow field plate 8.

[0027] Among them, in the first part, the cathode end plate 1 is made of FR-4 epoxy resin material, which is resistant to high temperature and has good heat insulation, and is lightweight. Eight M6 bolt heads are embedded inside its edge, and eight built-in bases and bolt holes that can bear M5 are reserved for the purpose of connecting the cathode end plate 1 with the cathode collector plate 3;

[0028] The cathode insulating plate 2 is made of FR-4 epoxy resin, which is resistant to high temperatures, has good heat insulation and is lightweight. It is constructed in an open square ring shape, that is, a square opening 9 is opened in the middle of the cathode insulating plate 2. The square ring design facilitates the heating plate to be glued inside it, and an opening 10 connected to the square opening 9 is opened on the edge of the cathode insulating plate 2, which can solve the problem of heating plate routing. A total of 8 M6-type fastening bolt holes (corresponding to the bolt positions on the cathode end plate) are designed on the four sides of the cathode insulating plate 2 for series connection and installation between the plates; 8 M5-type fastening bolt holes are designed for connecting the cathode collector plate 3 with the cathode end plate 1;

[0029] The cathode collector plate 3 is made of gold-plated copper, which has high conductivity, corrosion resistance and good thermal conductivity. Figure 1 The arrow B in the middle indicates "Cathode", and gas pipeline connectors 13 are designed on both sides. The gas pipeline connectors 13 are designed on both sides of the cathode collector plate 3, and a built-in rubber strip groove is designed at the edge of the second gas port 11. The rubber strip is arranged in the groove to facilitate replacement due to aging of the sealing rubber strip. Eight M5 threaded holes (corresponding to the M5 bolt positions on the cathode end plate 1) are designed on the edge of the cathode collector plate 3 for connection with the cathode end plate 1.

[0030] The cathode flow field plate 4 is made of graphite, which has high conductivity, corrosion resistance and high temperature resistance. The surface of the cathode collector plate 3 is provided with a second gas port 11 connected to the cathode flow field plate 4. There are two second gas ports 11. Figure 1 As shown, the second gas ports 11 are located on one side of the gas pipeline connector 13 and the two are connected, and a first gas port 12 corresponding to the second gas port 11 is provided on the cathode flow field plate 4, one gas pipeline connector 13 is a cathode inlet, and the other gas pipeline connector 13 is a cathode outlet, as shown in FIG. Figure 1 As shown, one second gas port 11 is located at a position corresponding to the cathode inlet, and the other second gas port 11 is located at a position corresponding to the cathode outlet. The gas pipeline connectors 13 on both sides are arranged at different heights, which will generate a pressure difference, and its purpose is to facilitate the purge of water produced by the membrane electrode reaction, and effectively reduce the membrane electrode gas shortage and water flooding.

[0031] Compared with the traditional direct current channel, it can produce a higher inlet and outlet pressure difference, quickly discharge the reacting liquid water, allow more gas to participate in the reaction, and is not easy to cause local flooding of the battery; the gas transmission is good and evenly distributed, and the reaction is more complete. A detection hole 14 for plugging in a temperature sensor is also designed on the cathode flow field plate 4. The hole depth is one-fourth of the length of the anode flow field plate 8 and the cathode flow field plate 4. The purpose is to detect the actual temperature inside the single cell. A total of 8 M6-type fastening bolt holes are designed on the four sides of the cathode flow field plate 4 (corresponding to the bolt position on the cathode end plate) for series connection and installation between the plates.

[0032] In the second part, as Figure 1 As shown, the anode end plate 5 is made of FR-4 epoxy resin material, which is resistant to high temperature and has good heat insulation, and is lightweight. A total of 8 M6 type fastening bolt holes are designed on the four sides of the plate (corresponding to the bolt positions on the cathode end plate) for series connection and installation between the plates;

[0033] The anode insulating plate 6 is made of FR-4 epoxy resin, which is resistant to high temperatures, has good heat insulation, and is lightweight. It is constructed in an open square ring shape, that is, a square opening 9 is opened in the middle of the anode insulating plate 6 to allow the heating plate to be glued inside it. An opening 10 connected to the square opening is opened on one side of the anode insulating plate 6. The design of the opening 10 can solve the problem of wiring the heating plate. A total of 8 M6-type fastening bolt holes are designed on the four sides of the plate (corresponding to the bolt positions on the cathode end plate) for series connection and installation between the plates;

[0034] The anode collector plate 7 is made of gold-plated copper, which has high conductivity, corrosion resistance and good thermal conductivity. Figure 1 The arrow C in the middle indicates "Anode". A built-in rubber strip groove is designed at the edge of the second gas port 11. A rubber strip is arranged in the groove to facilitate replacement due to aging of the sealing strip. Eight M5 threaded holes (corresponding to the M5 bolt holes on the anode end plate) are designed on the other side for connection with the anode end plate.

[0035] The anode flow field plate 8 is made of graphite, which has high conductivity, corrosion resistance and high temperature resistance. The surface of the anode collector plate 7 is provided with a second gas port 11 connected to the anode flow field plate 8. There are two second gas ports 11. Figure 1 As shown, the second gas ports 11 are located on one side of the gas pipeline connector 13 and the two are connected, and the anode flow field plate 8 is also provided with a first gas port 12 corresponding to the second gas port 11; wherein one gas pipeline connector 13 is the anode inlet, and the other gas pipeline connector 13 is the anode outlet, as shown in FIG. Figure 1As shown, the position of one second gas port 11 corresponds to the anode inlet, and the position of the other second gas port 11 corresponds to the anode outlet; the gas pipeline connectors 13 on both sides are set at different heights, which will produce a pressure difference, the purpose of which is to facilitate the purge of water that penetrates into the anode during the membrane electrode reaction, and effectively reduce the membrane electrode gas shortage and water flooding.

[0036] like Figure 3 and Figure 4 As shown, a detection hole 14 for inserting a temperature sensor is also designed on the side of the anode flow field plate 8. The hole depth is one quarter of the length of the anode flow field plate 8 and the cathode flow field plate 4. The purpose is to detect the actual temperature inside the single cell.

[0037] Compared with the traditional direct current channel, it can produce a higher inlet and outlet pressure difference, quickly discharge the reacting liquid water, allow more gas to participate in the reaction, and is not easy to cause local flooding of the battery. The gas is well transmitted and evenly distributed, and the reaction is more complete.

[0038] The installation order of each structure in the utility model is: cathode end plate-cathode insulating plate-heating plate-cathode collector plate-cathode flow field plate-membrane electrode-anode flow field plate-anode collector plate-heating plate-anode insulating plate-anode end plate.

[0039] The design advantages of this solution:

[0040] 1. From the installation operation:

[0041] 1. Only for the first use, it is necessary to install them one by one according to the above installation sequence (the installation, positioning and tightening of the overall fixture rely on M6 bolts). When replacing the membrane electrode again, there is no need to disassemble and install them one by one (relying on the integrated structure of the anode and cathode poles, that is, the cathode and cathode end plates and the cathode and cathode collector plates are designed with fastening devices for each pole, and the cathode end plate, insulating plate and collector plate are connected and tightened by M5 bolts. Similarly, the anode end plate, insulating plate and collector plate are also connected and tightened by M5 bolts), and the mechanical friction caused by frequent disassembly and assembly is reduced, effectively extending the service life of this fixture;

[0042] 2. The embedded bolt fixing method only uses the specified torque to tighten and calibrate one end, and no other auxiliary tools are required. Compared with the existing clamps, this design can effectively reduce the force lost in the two-way tightening process; reduce the two-way loosening of the clamp during the test, thereby reducing the risk of air leakage; and also reduce the mechanical damage caused by bolts, nuts, etc. to the outer surface of the end plate during the tightening process;

[0043] 3. The combination of the embedded bolt fixing method and the integrated structure of the anode and cathode electrodes makes it easier to install and replace the membrane electrode. During the installation and tightening process, the CCM and GDL can be horizontal to the desktop, so that the membrane electrode will not shift.

[0044] 2. From the test process and results:

[0045] 1. Heating method: The heating plate is built between the end plate, the insulating plate, and the collector plate, close to the collector plate, and the material selection of the end plate and the insulating plate is just right to achieve effective heat insulation and heat preservation. This makes the heating efficiency of the heating plate higher, so that the battery interior reaches the predetermined temperature of the test faster, and there will be no large temperature fluctuations in harsh environments, effectively reducing the impact of temperature fluctuations on the test results;

[0046] 2. Gas transmission method: The cathode and anode reaction gases flow from the pipeline through the collector plate to the flow field plate and then to the catalyst layer to participate in the reaction. During this process, the temperature of the gas flowing through the pipeline will decrease, but after passing through the collector plate, the reaction gas is effectively heated (the temperature of the cathode and anode collector plates is consistent with the heating plate), and the temperature can reach the set temperature of the single cell fixture. Compared with the existing fixture, the gas temperature is increased, which promotes the internal reaction of the membrane electrode and the reaction kinetics is obvious. Also compared with the existing fixture, this design reduces the condensation of the reaction gas during transportation, and effectively reduces the lack of gas and water flooding of the membrane electrode during the reaction process;

[0047] 3. The design of "up-in-down-out" for the anode and cathode: the gas pipeline connectors 13 on both sides are set at different heights to facilitate the purge of water produced by the membrane electrode reaction and effectively reduce the phenomenon of insufficient gas and water flooding of the membrane electrode;

[0048] 4. Flow field selection: Compared with the traditional direct current channel, it can produce a higher inlet and outlet pressure difference, quickly discharge the reacting liquid water, allow more gas to participate in the reaction, and is not easy to cause local flooding of the battery; the contact resistance is reduced, the rotation is reduced, the cross flow phenomenon under the ridge is reduced, the gas transmission is good and evenly distributed, and the reaction is more complete;

[0049] 5. Temperature monitoring method: The cathode and anode flow field plates are each designed with an original hole with a depth of one-quarter of the length of the plate. This design can intuitively and accurately identify the actual temperature inside the single-cell test fixture during the test;

[0050] 6. Sealing ring groove design: Sealing ring grooves are designed on the anode and cathode collector plates and flow field plates respectively. Compared with the existing fixture, this design can be cut and replaced by itself due to aging of the sealing strip, reducing the risk of air leakage.

[0051] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0052] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new fuel cell test fixture, characterized in that: include: An anode collector plate (7) and a cathode collector plate (3), gas pipeline connectors (13) are respectively provided on both sides of the anode collector plate (7) and the cathode collector plate (3), the gas pipeline connectors (13) on both sides are arranged at different heights, one gas pipeline connector (13) is an inlet, and the other gas pipeline connector (13) is an outlet, two second gas ports (11) are provided on opposite surfaces of the anode collector plate (7) and the cathode collector plate (3), the second gas ports (11) are respectively located on one side of the gas pipeline connector (13) and the two are connected; An anode flow field plate (8) and a cathode flow field plate (4), both of which are located between the anode current collector plate (7) and the cathode current collector plate (3), the anode flow field plate (8) is located on the side of the anode current collector plate (7), and the cathode flow field plate (4) is located on the side of the cathode current collector plate (3), and two first gas ports (12) corresponding to the second gas ports (11) are respectively provided on the surface of the anode flow field plate (8) and the cathode flow field plate (4); A cathode insulating plate (2) and an anode insulating plate (6), wherein a square opening (9) is provided in the middle of each of the cathode insulating plate (2) and the anode insulating plate (6), wherein a heating plate is placed in the square opening (9), wherein the cathode insulating plate (2) is arranged on a side of the cathode collector plate (3) away from the anode collector plate (7), and wherein the anode insulating plate (6) is arranged on a side of the anode collector plate (7) away from the cathode collector plate (3); A cathode end plate (1) and an anode end plate (5), wherein the cathode end plate (1) and the anode end plate (5) are located at the outermost sides of the fuel cell test fixture, the cathode end plate (1) is connected to the side of the cathode insulating plate (2), and the anode end plate (5) is connected to the side of the anode insulating plate (6); The cathode end plate (1), the cathode insulating plate (2), the cathode current collector plate (3), the cathode flow field plate (4), the anode end plate (5), the anode insulating plate (6), the anode current collector plate (7), and the anode flow field plate (8) are stacked on top of each other and are fastened at their edges by a plurality of bolts.

2. A novel fuel cell test fixture according to claim 1, characterized in that: An opening (10) communicating with the square opening (9) is provided on one side of the cathode insulating plate (2) and the anode insulating plate (6), and a wire connected to the heating plate is distributed in the opening (10).

3. A novel fuel cell test fixture according to claim 1, characterized in that: A rubber strip is provided at the edge of the first air port (12).

4. A novel fuel cell test fixture according to claim 1, characterized in that: The sides of the anode flow field plate (8) and the cathode flow field plate (4) are provided with detection holes (14) extending radially toward the center thereof, and the depth of the detection holes (14) is one quarter of the length of the anode flow field plate (8) and the cathode flow field plate (4).

5. A novel fuel cell test fixture according to claim 1, characterized in that: The anode flow field plate (8) and the cathode flow field plate (4) are both made of graphite.

6. A novel fuel cell test fixture according to claim 1, characterized in that: The cathode end plate (1) and the anode end plate (5) are both made of FR-4 epoxy resin.

7. A novel fuel cell test fixture according to claim 1, characterized in that: The cathode insulating plate (2) and the anode insulating plate (6) are both made of FR-4 epoxy resin.

8. A novel fuel cell test fixture according to claim 1, characterized in that: The anode current collector plate (7) and the cathode current collector plate (3) are both made of gold-plated copper.

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