A test mold that can be used for HT-PEMFC single cells and series / parallel stacks

Abstract

The present invention relates to a test mold that can be used for HT-PEMFC single cells and series / parallel stacks, including: an upper fixing plate, an upper insulating plate, an upper graphite plate, an upper inlet gas flow channel, an upper outlet gas flow channel, a middle graphite plate, a first middle inlet gas flow channel, a second middle inlet gas flow channel, a third middle outlet gas flow channel, a fourth middle outlet gas flow channel, a lower graphite plate, a lower insulating plate, a lower fixing plate, a lower inlet gas flow channel, a lower outlet gas flow channel, and fasteners. It has the advantages that the mold can be used not only for testing single cells, series or parallel cell stacks of high-temperature proton exchange membrane fuel cells, but also for low-temperature proton exchange membrane fuel cells, can be applied not only in scientific research experiments but also as a teaching tool, and can be conveniently transferred by changing the dimensions of its parts.

Description

Technical Field

[0001] The present invention relates to a test mold that can be used for single cells and series / parallel stacks of HT-PEMFCs. Background Art

[0002] Currently, temperature is one of the important influencing factors of proton exchange membrane fuel cells (PEMFCs), and the performance of fuel cells improves with the increase in temperature. The operating temperature of high-temperature proton exchange membrane fuel cells (HT-PEMFCs) is usually 100-200 °C, which has faster chemical reaction kinetics compared to low-temperature proton exchange membrane fuel cells. There are generally single cells and series molds for both low-temperature and high-temperature proton exchange membrane fuel cells on the market. When it is necessary to change the series / parallel state, the mold needs to be disassembled, which is inconvenient to use. Summary of the Invention

[0003] The object of the present invention is to overcome the deficiencies of the prior art and provide a test mold that can be used for single cells and series / parallel stacks of HT-PEMFCs. This mold can not only be used for testing single cells, series or parallel cell stacks of high-temperature proton exchange membrane fuel cells, but also for low-temperature proton exchange membrane fuel cells; when conducting tests on fuel cell series or parallel cell stacks, it is not necessary to disassemble the mold parts. Only by changing the way of introducing fuel gas and oxygen or air gas, the conversion between series cell stack testing and parallel cell stack testing can be achieved; the graphite plates, PCB boards, and aluminum alloy plates applied to the high-temperature proton exchange membrane fuel cell mold are more temperature-resistant and stable compared to materials such as acrylic plates applied to the low-temperature proton exchange membrane fuel cell mold; this mold can not only be applied in scientific research experiments, but also be used as a teaching tool, and can be conveniently transferred by changing the dimensions of its parts.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows. It is a test mold that can be used for single cells and series / parallel stacks of HT-PEMFCs, characterized by including:

[0005] An upper fixing plate, an upper insulating plate, an upper graphite plate, an upper inlet gas flow channel, and an upper outlet gas flow channel; the upper fixing plate, the upper insulating plate, and the upper graphite plate are stacked together from top to bottom in sequence. An upper gas groove is provided at the lower part of the upper graphite plate. The upper inlet gas flow channel penetrates through the upper fixing plate, the upper insulating plate, and the upper graphite plate. The inlet of the upper inlet gas flow channel is communicated with the outside, and the outlet of the upper inlet gas flow channel is communicated with the upper gas groove. The upper outlet gas flow channel penetrates through the upper fixing plate, the upper insulating plate, and the upper graphite plate. The outlet of the upper outlet gas flow channel is communicated with the outside, and the inlet of the upper outlet gas flow channel is communicated with the upper gas groove. An upper ear is provided on the upper graphite plate;

[0006] Middle graphite plate, first middle air inlet channel, second middle air inlet channel, third middle air outlet channel, fourth middle air outlet channel; a first middle gas groove is provided at the upper part of the middle graphite plate, and a second middle gas groove is provided at the lower part of the middle graphite plate. The air inlet of the first middle air inlet channel is communicated with the outside, and the air outlet of the first middle air inlet channel is communicated with the second middle gas groove. The air inlet of the second middle air inlet channel is communicated with the outside, and the air outlet of the second middle air inlet channel is communicated with the first middle gas groove. The air inlet of the third middle air outlet channel is communicated with the first middle gas groove, and the air outlet of the third middle air outlet channel is communicated with the outside. The air inlet of the fourth middle air outlet channel is communicated with the second middle gas groove, and the air outlet of the fourth middle air outlet channel a is communicated with the outside. The middle graphite plate is stacked below the upper graphite plate, so that the first middle gas groove and the upper gas groove cooperate to clamp the proton exchange membrane fuel cell. A middle tab is provided on the middle graphite plate;

[0007] Lower graphite plate, lower insulating plate, lower fixing plate, lower air inlet channel and lower air outlet channel; the lower graphite plate, lower insulating plate and lower fixing plate are stacked together from top to bottom. A lower gas groove is provided at the lower part of the lower graphite plate. The lower air inlet channel penetrates through the lower graphite plate, lower insulating plate and lower fixing plate. The air inlet of the lower air inlet channel is communicated with the outside, and the air outlet of the lower air inlet channel is communicated with the lower gas groove. The lower air outlet channel penetrates through the lower graphite plate, lower insulating plate and lower fixing plate. The air outlet of the lower air outlet channel is communicated with the outside, and the air inlet of the lower air outlet channel is communicated with the lower gas groove. The lower graphite plate is stacked below the middle graphite plate, so that the second middle gas groove and the lower gas groove cooperate to clamp the proton exchange membrane fuel cell. A lower tab is provided on the lower graphite plate; and

[0008] Fasteners; the fasteners are installed on the upper fixing plate and the lower fixing plate to position the upper fixing plate, upper insulating plate, upper graphite plate, middle graphite plate, lower graphite plate, lower insulating plate and lower fixing plate.

[0009] In this technical solution, an upper sealing rubber ring, a first middle sealing rubber ring, a second middle sealing rubber ring and a lower sealing rubber ring are further included. The upper sealing rubber ring is installed on the upper gas groove. The first middle sealing ring is installed on the first middle gas groove. The second middle sealing ring is installed on the second middle gas groove. The lower sealing ring is installed on the lower gas groove.

[0010] In this technical solution, it further includes a first gas nozzle, a second gas nozzle, a third gas nozzle, a fourth gas nozzle, a fifth gas nozzle, a sixth gas nozzle, a seventh gas nozzle and an eighth gas nozzle; the first gas nozzle is installed at the air inlet of the upper air flow channel, the second gas nozzle is installed at the air outlet of the upper air outlet channel, the third gas nozzle is installed at the air inlet of the first middle air flow channel, the fourth gas nozzle is installed at the air outlet of the third middle air outlet channel, the fifth gas nozzle is installed at the air inlet of the second middle air flow channel, the sixth gas nozzle is installed at the air outlet of the fourth middle air outlet channel a, the seventh gas nozzle is installed at the air inlet of the lower air flow channel, and the eighth gas nozzle is installed at the air outlet of the lower air outlet channel.

[0011] In this technical solution, the air outlet of the upper air flow channel and the air inlet of the upper air outlet channel are respectively located on both sides of the upper gas tank, the air outlet of the first middle air flow channel and the air inlet of the fourth middle air outlet channel a are located on both sides of the second middle gas tank, the air outlet of the second middle air flow channel and the air inlet of the third middle air outlet channel are located on both sides of the first middle gas tank, and the air outlet of the lower air flow channel and the air inlet of the lower air outlet channel are located on both sides of the lower gas tank.

[0012] The advantages of the present invention compared with the prior art are as follows: This mold can be used not only for the testing of single cells, series or parallel cell stacks of high-temperature proton exchange membrane fuel cells, but also for low-temperature proton exchange membrane fuel cells; when conducting fuel cell series or parallel cell stack tests, it is not necessary to disassemble the mold parts, and only by changing the way of introducing fuel gas and oxygen or air gas, the conversion between series cell stack tests and parallel cell stack tests can be achieved; the graphite plates, PCB boards and aluminum alloy plates applied to the mold of high-temperature proton exchange membrane fuel cells are more temperature-resistant and stable than materials such as acrylic plates applied to the mold of low-temperature proton exchange membrane fuel cells; this mold can be not only applied in scientific research experiments, but also used as a teaching tool, and can be conveniently transferred by changing the dimensions of its parts. Brief Description of the Drawings

[0013] Figure 1 is the exploded view of the present invention;

[0014] Figure 2 is the schematic structural diagram after the assembly of the present invention;

[0015] Figure 3 is the top view of the present invention;

[0016] Figure 4 is Figure 3 the A-A cross-sectional view of

[0017] Figure 5 is Figure 3 the B-B cross-sectional view of

[0018] Figure 6 isFigure 3 C-C cross-sectional view;

[0019] Figure 7 is Figure 3 D-D cross-sectional view;

[0020] Figure 8 is a schematic structural diagram of the upper graphite plate in the upward view direction;

[0021] Figure 9 is a schematic structural diagram of the middle graphite plate in the downward view direction;

[0022] Figure 10 is a schematic structural diagram of the middle graphite plate in the upward view direction;

[0023] Figure 11 is a schematic structural diagram of the lower graphite plate in the downward view direction. Detailed implementation manners

[0024] The following further describes the detailed implementation manners of the present invention with reference to the accompanying drawings. It should be noted here that the description of these implementation manners is used to help understand the present invention, but does not constitute a limitation to the present invention. In addition, the technical features involved in the various implementation manners of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] In the description of the present invention, the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present invention.

[0026] As Figures 1 to 11 shown, it is a test mold that can be used for HT-PEMFC single cells and series-parallel stacks, including:

[0027] Upper fixing plate 3, upper insulating plate 4, upper graphite plate 5, upper inlet gas channel 15 and upper outlet gas channel 14; the upper fixing plate 3, upper insulating plate 4 and upper graphite plate 5 are stacked together in sequence from top to bottom. An upper gas groove 51 is provided at the lower part of the upper graphite plate 5. The upper inlet gas channel 15 penetrates through the upper fixing plate 3, upper insulating plate 4 and upper graphite plate 5. The inlet of the upper inlet gas channel 15 is communicated with the outside, and the outlet of the upper inlet gas channel 15 is communicated with the upper gas groove 51. The upper outlet gas channel 14 penetrates through the upper fixing plate 3, upper insulating plate 4 and upper graphite plate 5. The outlet of the upper outlet gas channel 14 is communicated with the outside, and the inlet of the upper outlet gas channel 14 is communicated with the upper gas groove 51. An upper tab 52 is provided on the upper graphite plate 5;

[0028] Middle graphite plate 8, first middle air inlet channel 18, second middle air inlet channel 19, third middle air outlet channel 20, fourth middle air outlet channel 1a; a first middle gas groove 81 is provided at the upper part of the middle graphite plate 8, and a second middle gas groove 82 is provided at the lower part of the middle graphite plate 8. The air inlet of the first middle air inlet channel 18 is communicated with the outside, and the air outlet of the first middle air inlet channel 18 is communicated with the second middle gas groove 82. The air inlet of the second middle air inlet channel 19 is communicated with the outside, and the air outlet of the second middle air inlet channel 19 is communicated with the first middle gas groove 81. The air inlet of the third middle air outlet channel 20 is communicated with the first middle gas groove 81, and the air outlet of the third middle air outlet channel 20 is communicated with the outside. The air inlet of the fourth middle air outlet channel 1a is communicated with the second middle gas groove 82, and the air outlet of the fourth middle air outlet channel 1a is communicated with the outside. The middle graphite plate 8 is stacked below the upper graphite plate 5, so that the first middle gas groove 81 and the upper gas groove 51 cooperate to clamp the proton exchange membrane fuel cell. A middle tab 83 is provided on the middle graphite plate 8;

[0029] Lower graphite plate 11, lower insulating plate 12, lower fixing plate 13, lower air inlet channel 16 and lower air outlet channel 17; the lower graphite plate 11, the lower insulating plate 12 and the lower fixing plate 13 are stacked together from top to bottom. A lower gas groove 111 is provided at the lower part of the lower graphite plate 11. The lower air inlet channel 16 penetrates through the lower graphite plate 11, the lower insulating plate 12 and the lower fixing plate 13. The air inlet of the lower air inlet channel 16 is communicated with the outside, and the air outlet of the lower air inlet channel 16 is communicated with the lower gas groove 111. The lower air outlet channel 17 penetrates through the lower graphite plate 11, the lower insulating plate 12 and the lower fixing plate 13. The air outlet of the lower air outlet channel 17 is communicated with the outside, and the air inlet of the lower air outlet channel 17 is communicated with the lower gas groove 111. The lower graphite plate 11 is stacked below the middle graphite plate 8, so that the second middle gas groove 82 and the lower gas groove 111 cooperate to clamp the proton exchange membrane fuel cell. A lower tab 112 is provided on the lower graphite plate 11; and

[0030] Fastener 1; the fastener 1 is installed on the upper fixing plate 3 and the lower fixing plate 13 so as to position the upper fixing plate 3, the upper insulating plate 4, the upper graphite plate 5, the middle graphite plate 8, the lower graphite plate 11, the lower insulating plate 12 and the lower fixing plate 13.

[0031] During operation, when testing the series stack of dual proton exchange membrane fuel cells, the middle graphite plate 8 is placed between the upper graphite plate 5 and the lower graphite plate 11. The first middle gas groove 81 and the upper gas groove 51 cooperate to clamp a proton exchange membrane fuel cell, and the second middle gas groove 82 and the lower gas groove 111 cooperate to clamp another proton exchange membrane fuel cell. The upper air inlet channel 15 is introduced with fuel gas, such as hydrogen, etc., the first middle air inlet channel 18 is introduced with fuel gas, such as hydrogen, etc., the second middle air inlet channel 19 is introduced with oxygen or air, and the lower air inlet channel 16 is introduced with oxygen or air. The fuel gas and oxygen or air react with the proton exchange membrane fuel cell clamped by the first middle gas groove 81 and the upper gas groove 51, so that the upper graphite plate 5 is the anode. The fuel gas and oxygen or air react with the other proton exchange membrane fuel cell clamped by the second middle gas groove 82 and the lower gas groove 111, so that the lower graphite plate 11 is the cathode. The upper air outlet channel 14 discharges the reacted fuel gas, the third middle air outlet channel 20 discharges the reacted oxygen and water, the fourth middle air outlet channel 1a discharges the reacted fuel gas, and the lower air outlet channel 17 discharges the reacted oxygen and water.

[0032] When testing the parallel stack of dual cells, when testing the series stack of dual proton exchange membrane fuel cells, the middle graphite plate 8 is placed between the upper graphite plate 5 and the lower graphite plate 11. The first middle gas groove 81 and the upper gas groove 51 cooperate to clamp a proton exchange membrane fuel cell, and the second middle gas groove 82 and the lower gas groove 111 cooperate to clamp another proton exchange membrane fuel cell. The upper air inlet channel 15 is introduced with fuel gas, such as hydrogen, etc., the first middle air inlet channel 18 is introduced with oxygen or air, the second middle air inlet channel 19 is introduced with oxygen or air, and the lower air inlet channel 16 is introduced with fuel gas, such as hydrogen, etc. The fuel gas reacts with the proton exchange membrane fuel cell clamped by the first middle gas groove 81 and the upper gas groove 51, so that the upper graphite plate 5 is the anode. The fuel gas reacts with the other proton exchange membrane fuel cell clamped by the second middle gas groove 82 and the lower gas groove 111, so that the lower graphite plate 11 is the anode, and the middle graphite plate 8 is the cathode. The upper air outlet channel 14 discharges the reacted fuel gas, the third middle air outlet channel 20 discharges the reacted oxygen and water, the fourth middle air outlet channel 1a discharges the reacted oxygen and water, and the lower air outlet channel 17 discharges the reacted fuel gas.

[0033] In this embodiment, it further includes an upper sealing rubber ring 6, a first middle sealing rubber ring 7, a second middle sealing rubber ring 9 and a lower sealing rubber ring 10. The upper sealing rubber ring 6 is installed on the upper gas groove 51, the first middle sealing ring 7 is installed on the first middle gas groove 81, the second middle sealing ring 9 is installed on the second middle gas groove 82, and the lower sealing ring 10 is installed on the lower gas groove 111.

[0034] In this embodiment, it further includes a first air nozzle 21, a second air nozzle 22, a third air nozzle 23, a fourth air nozzle 24, a fifth air nozzle 25, a sixth air nozzle 26, a seventh air nozzle 27 and an eighth air nozzle 28; the first air nozzle 21 is installed at the air inlet of the upper air flow channel 15, the second air nozzle 22 is installed at the air outlet of the upper air outlet channel 14, the third air nozzle 23 is installed at the air inlet of the first middle air flow channel 18, the fourth air nozzle 24 is installed at the air outlet of the third middle air outlet channel 20, the fifth air nozzle 25 is installed at the air inlet of the second middle air flow channel 19, the sixth air nozzle 26 is installed at the air outlet of the fourth middle air outlet channel 1a, the seventh air nozzle 27 is installed at the air inlet of the lower air flow channel 16, and the eighth air nozzle 28 is installed at the air outlet of the lower air outlet channel 17.

[0035] In this embodiment, the air outlet of the upper air flow channel 15 and the air inlet of the upper air outlet channel 14 are respectively located on both sides of the upper gas tank 51, the air outlet of the first middle air flow channel 18 and the air inlet of the fourth middle air outlet channel 1a are located on both sides of the second middle gas tank 82, the air outlet of the second middle air flow channel 19 and the air inlet of the third middle air outlet channel 20 are located on both sides of the first middle gas tank 81, and the air outlet of the lower air flow channel 16 and the air inlet of the lower air outlet channel 17 are located on both sides of the lower gas tank 111.

[0036] The above has made a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those of ordinary skill in the art, various changes, modifications, substitutions and deformations to these embodiments still fall within the protection scope of the present invention without departing from the principles and purposes of the present invention.

Claims

1. A test mold applicable to HT-PEMFC single cells and series / parallel stacks, characterized in that Including: Upper fixing plate (3), upper insulating plate (4), upper graphite plate (5), upper air outlet channel (14) and upper air inlet channel (15); the upper fixing plate (3), upper insulating plate (4) and upper graphite plate (5) are stacked together from top to bottom. An upper gas groove (51) is provided at the lower part of the upper graphite plate (5). The upper air inlet channel (15) penetrates through the upper fixing plate (3), upper insulating plate (4) and upper graphite plate (5). The air inlet of the upper air inlet channel (15) is communicated with the outside, and the air outlet of the upper air inlet channel (15) is communicated with the upper gas groove (51). The upper air outlet channel (14) penetrates through the upper fixing plate (3), upper insulating plate (4) and upper graphite plate (5). The air outlet of the upper air outlet channel (14) is communicated with the outside, and the air inlet of the upper air outlet channel (14) is communicated with the upper gas groove (51). An upper tab (52) is provided on the upper graphite plate (5); Middle graphite plate (8), first middle air inlet channel (18), second middle air inlet channel (19), third middle air outlet channel (20), fourth middle air outlet channel (1a); a first middle gas groove (81) is provided at the upper part of the middle graphite plate (8), and a second middle gas groove (82) is provided at the lower part of the middle graphite plate (8). The air inlet of the first middle air inlet channel (18) is communicated with the outside, and the air outlet of the first middle air inlet channel (18) is communicated with the second middle gas groove (82). The air inlet of the second middle air inlet channel (19) is communicated with the outside, and the air outlet of the second middle air inlet channel (19) is communicated with the first middle gas groove (81). The air inlet of the third middle air outlet channel (20) is communicated with the first middle gas groove (81), and the air outlet of the third middle air outlet channel (20) is communicated with the outside. The air inlet of the fourth middle air outlet channel (1a) is communicated with the second middle gas groove (82), and the air outlet of the fourth middle air outlet channel (1a) is communicated with the outside. The middle graphite plate (8) is stacked below the upper graphite plate (5) so that the first middle gas groove (81) and the upper gas groove (51) cooperate to clamp the proton exchange membrane fuel cell. An upper tab (52) is provided on the upper graphite plate (5), and a middle tab (83) is provided on the middle graphite plate (8); Lower graphite plate (11), lower insulating plate (12), lower fixing plate (13), lower inlet air flow channel (16) and lower outlet air flow channel (17); the lower graphite plate (11), lower insulating plate (12) and lower fixing plate (13) are stacked together from top to bottom. A lower gas groove (111) is provided at the lower part of the lower graphite plate (11). The lower inlet air flow channel (16) penetrates through the lower graphite plate (11), lower insulating plate (12) and lower fixing plate (13). The inlet of the lower inlet air flow channel (16) is communicated with the outside, and the outlet of the lower inlet air flow channel (16) is communicated with the lower gas groove (111). The lower outlet air flow channel (17) penetrates through the lower graphite plate (11), lower insulating plate (12) and lower fixing plate (13). The outlet of the lower outlet air flow channel (17) is communicated with the outside, and the inlet of the lower outlet air flow channel (17) is communicated with the lower gas groove (111). The lower graphite plate (11) is stacked below the middle graphite plate (8) so that the second middle gas groove (82) and the lower gas groove (111) cooperate to clamp the proton exchange membrane fuel cell. A lower tab (112) is provided on the lower graphite plate (11); and Fastener (1); the fastener (1) is installed on the upper fixing plate (3) and the lower fixing plate (13) so as to position the upper fixing plate (3), upper insulating plate (4), upper graphite plate (5), middle graphite plate (8), lower graphite plate (11), lower insulating plate (12) and lower fixing plate (13); It further includes an upper sealing rubber ring (6), a first middle sealing rubber ring (7), a second middle sealing rubber ring (9) and a lower sealing rubber ring (10). The upper sealing rubber ring (6) is installed on the upper gas groove (51). The first middle sealing rubber ring (7) is installed on the first middle gas groove (81). The second middle sealing rubber ring (9) is installed on the second middle gas groove (82). The lower sealing rubber ring (10) is installed on the lower gas groove (111); It further includes a first air nozzle (21), a second air nozzle (22), a third air nozzle (23), a fourth air nozzle (24), a fifth air nozzle (25), a sixth air nozzle (26), a seventh air nozzle (27) and an eighth air nozzle (28); the first air nozzle (21) is installed at the inlet of the upper inlet air flow channel (15). The second air nozzle (22) is installed at the outlet of the upper outlet air flow channel (14). The third air nozzle (23) is installed at the inlet of the first middle inlet air flow channel (18). The fourth air nozzle (24) is installed at the outlet of the third middle outlet air flow channel (20). The fifth air nozzle (25) is installed at the inlet of the second middle inlet air flow channel (19). The sixth air nozzle (26) is installed at the outlet of the fourth middle outlet air flow channel (1a). The seventh air nozzle (27) is installed at the inlet of the lower inlet air flow channel (16). The eighth air nozzle (28) is installed at the outlet of the lower outlet air flow channel (17).

2. The test mold for HT-PEMFC single cells and series / parallel stacks according to claim 1, characterized in that The air outlet of the upper intake air flow channel (15) and the air inlet of the upper outlet air flow channel (14) are respectively located on both sides of the upper gas tank (51). The air outlet of the first middle intake air flow channel (18) and the air inlet of the fourth middle outlet air flow channel (1a) are located on both sides of the second middle gas tank (82). The air outlet of the second middle intake air flow channel (19) and the air inlet of the third middle outlet air flow channel (20) are located on both sides of the first middle gas tank (81). The air outlet of the lower intake air flow channel (16) and the air inlet of the lower outlet air flow channel (17) are located on both sides of the lower gas tank (111).

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