Fuel cell flow channel visualization test device

Abstract

The invention provides a fuel cell flow channel visualization test device which comprises anode bakelite, an anode end plate, an anode insulating plate, an anode collector plate, an anode bipolar plate, a membrane electrode, a cathode visualization polar plate, a sapphire glass window, a window insulating baffle, a cathode visualization end plate and cathode bakelite which are sequentially stacked and mounted from one side to the other side, all the parts are fixedly stacked and connected through cooperation of fastening nuts and fastening bolts. According to the visual test device for the fuel cell flow channel, an original flow field structure is not changed, a visual window is maximized, and undisturbed visual test on the fuel cell flow field is realized.

Description

Technical Field

[0001] The present invention belongs to the field of core components of new energy fuel cells, and particularly relates to a fuel cell flow channel visualization test device. Background Art

[0002] The temperature uniformity and flow field uniformity in the activation area of a fuel cell are crucial for improving the operating temperature of the fuel cell. Flow field visualization testing is one of the important means to study uniformity. In conventional visualization testing, since a part of the flow channel ridge is independent, if the entire flow channel is hollowed out, the position of the flow channel ridge cannot be fixed. In order to carry out the test, the test structure often changes the original flow channel structure. It may deepen the flow channel depth or add flow disturbance elements to the original flow channel. It is difficult for the test results to reflect the distribution of the original flow field, and there are deviations in the test results. In order to avoid the occurrence of the above situation, innovative design should be carried out from the perspective of how not to change the original flow field structure, and at the same time, the system should have good sealing performance. Summary of the Invention

[0003] In view of this, the present invention aims to provide a fuel cell flow channel visualization test device to avoid the problem of deviation in test results.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows: A fuel cell flow channel visualization test device includes an anode bakelite, an anode end plate, an anode insulating plate, an anode current collector plate, an anode bipolar plate, a membrane electrode, a cathode visualization plate, a sapphire glass window, a window insulating baffle, a cathode visual end plate, and a cathode bakelite, which are stacked and installed in sequence from one side to the other side. The above-mentioned parts are fixedly stacked and connected through the cooperation of fastening nuts and fastening bolts.

[0005] Further, both sides of the anode bipolar plate are sealed by a first sealing ring and a second sealing ring.

[0006] Further, the sapphire glass window is nested inside the cathode visualization plate, and both sides are sealed by a third sealing ring and a fourth sealing ring respectively.

[0007] Further, the back surface of the flow field position of the cathode visualization plate is hollowed out, and the hollowing treatment does not change the flow field structure; a solid flow channel ridge fixing strip is added in the middle part of the hollowed area, and its function is to position and fix the flow field flow channel ridge, and together with the cathode visualization plate, the hollowed area is divided into two groove structures, and the bottom surface of the groove is the lower surface of the flow channel ridge.

[0008] Further, the number of the sapphire glass windows is two, the material is sapphire glass, the shape is a cuboid, the thickness is the same as the depth of the concave groove in the cathode visualization plate, and the length and width are equivalent to those of the concave groove and maintain a small clearance fit; the sapphire glass windows are installed in the concave grooves and together with the flow channel ridges and the membrane electrode form a rectangular cross-section flow channel for fluid movement.

[0009] Further, the material of the window insulating baffle is an insulating material; a sealing groove is arranged on the side of the combination surface with the cathode visualization plate, and the position of the sealing groove can ensure that the No. 4 sealing ring installed therein effectively seals the small clearance between the sapphire glass window and the cathode visualization plate.

[0010] Compared with the prior art, the fuel cell flow channel visualization test device of the present invention has the following advantages: (1) The fuel cell flow channel visualization test device of the present invention can maximize the visualization window without changing the original flow field structure and realize non-disturbing visualization testing of the fuel cell flow field.

[0011] (2) The fuel cell flow channel visualization test device of the present invention performs a hollowing process on the back of the flow field position of the plate to be observed, and a solid flow channel ridge fixing strip is added in the middle part of the hollowed area to ensure that the flow channel ridge does not fall off due to the hollowing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings: Figure 1 is an exploded view of the fuel cell flow channel visualization test device according to the embodiment of the present invention; Figure 2 is the front and back surface structures of the cathode visualization plate according to the embodiment of the present invention; Figure 3 is the front view of the cathode visualization plate according to the embodiment of the present invention; Figure 4 is Figure 3 the sectional view taken along the line A-A in Figure 5 is the installation relationship diagram of the cathode visualization plate - sapphire glass window - No. 4 sealing ring - window insulating baffle according to the embodiment of the present invention; Figure 6 is Figure 5 the sectional view taken along the line B-B of Figure 7 is Figure 5 the sectional view taken along the line C-C of Figure 8 is Figure 5Enlarged and rotated view of part A; Figure 9 is Figure 5 Enlarged and rotated view of part B.

[0013] Description of reference numerals: 1 - fastening nut; 2 - anode bakelite; 3 - anode end plate; 4 - anode insulating plate; 5 - anode current collector plate; 6 - first sealing ring; 7 - anode bipolar plate; 8 - second sealing ring; 9 - membrane electrode; 10 - third sealing ring; 11 - cathode visualization plate; 111 - flow channel ridge; 12 - fourth sealing ring; 13 - sapphire glass window; 14 - window insulating baffle; 15 - cathode visual end plate; 16 - cathode bakelite; 17 - fastening bolt. Detailed implementation manners

[0014] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0015] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0016] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0017] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0018] A fuel cell flow channel visualization test device, as Figures 1 to 9As shown in the figure, it includes an anode bakelite 2, an anode end plate 3, an anode insulating plate 4, an anode current collector plate 5, an anode bipolar plate 7, a membrane electrode 9, a cathode visualization plate 11, a sapphire glass window 13, a window insulating baffle 14, a cathode visual end plate 15, and a cathode bakelite 16, which are stacked and installed in sequence from one side to the other side. The above-mentioned parts are fixedly stacked and connected by cooperation of fastening nuts 1 and fastening bolts 17.

[0019] Both sides of the anode bipolar plate 7 are sealed by a first sealing ring 6 and a second sealing ring 8.

[0020] The cathode visualization plate 11 internally nests the sapphire glass window 13, and both sides are respectively sealed by a third sealing ring 10 and a fourth sealing ring 12.

[0021] Preferably, the back surface of the cathode visualization plate 11 at the flow field position is hollowed out, and the hollowing-out treatment does not change the flow field structure; a solid flow channel ridge 111 is added in the middle part of the hollowed-out area. Its function is to position and fix the flow field channel ridge 111, and together with the cathode visualization plate 11, the hollowed-out area is divided into two groove structures, and the bottom surface of the groove is the lower surface of the flow channel ridge.

[0022] The number of sapphire glass windows 13 is 2. The material is sapphire glass, the shape is a cuboid, the thickness is the same as the depth of the concave groove in the cathode visualization plate 11, and the length and width are equivalent to the concave groove and maintain a small clearance fit; the sapphire glass window 13 is installed in the concave groove, and together with the flow channel ridge 111 and the membrane electrode 9, it constitutes a rectangular cross-section flow channel for fluid movement.

[0023] The material of the window insulating baffle 14 is an insulating material; a sealing groove is arranged on the side of the combination surface with the cathode visualization plate 11, and the position of the sealing groove can ensure that the fourth sealing ring 12 installed therein effectively seals the small clearance and other positions between the sapphire glass window 13 and the cathode visualization plate 11.

[0024] A fuel cell flow channel visualization test device can not change the original flow field structure, maximize the visualization window, and realize non-disturbing visualization testing of the fuel cell flow field.

[0025] The above are only the preferred embodiments of the present invention, and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A visualization test device for a fuel cell flow channel, characterized in that: It includes an anode bakelite, an anode end plate, an anode insulating plate, an anode current collector plate, an anode bipolar plate, a membrane electrode, a cathode visualization plate, a sapphire glass window, a window insulating baffle, a cathode visual end plate, and a cathode bakelite, which are stacked and installed in sequence from one side to the other side. The above-mentioned parts are fixedly stacked and connected through the cooperation of fastening nuts and fastening bolts.

2. The visualization test device for the fuel cell flow channel according to claim 1, characterized in that: Both sides of the anode bipolar plate are sealed by a first sealing ring and a second sealing ring.

3. A fuel cell flow channel visualization test device according to claim 1, characterized in that: The sapphire glass window is nested inside the cathode visualization plate, and both sides are sealed by a third sealing ring and a fourth sealing ring respectively.

4. A fuel cell flow channel visualization test device according to claim 1, characterized in that: The back of the flow field position of the cathode visualization plate is hollowed out, and the hollowing-out treatment does not change the flow field structure; a solid flow channel ridge fixing strip is added in the middle part of the hollowed-out area, and its function is to position and fix the flow field flow channel ridge, and together with the cathode visualization plate, the hollowed-out area is divided into two groove structures, and the bottom surface of the groove is the lower surface of the flow channel ridge.

5. The visualization test device for a fuel cell flow channel according to claim 4, wherein: The number of sapphire glass windows is 2, the material is sapphire glass, the shape is a cuboid, the thickness is the same as the depth of the concave groove in the cathode visualization plate, and the length and width are equivalent to the concave groove and maintain a small clearance fit; the sapphire glass window is installed in the concave groove and together with the flow channel ridge and the membrane electrode, it constitutes a rectangular cross-section flow channel for fluid movement.

6. The visualization test device for fuel cell flow channels according to claim 3, characterized in that: The material of the window insulating baffle is an insulating material; a sealing groove is arranged on the side of the combination surface with the cathode visualization plate, and the position of the sealing groove can ensure that the fourth sealing ring installed therein effectively seals the small clearance between the sapphire glass window and the cathode visualization plate.

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