Fuel cell leak detection device

Abstract

The utility model relates to the technical field of fuel cell leak detection, in particular to a fuel cell leak detection device. According to the fuel cell leak hunting device, a multi-way valve is arranged on a main air inlet pipeline, and a fuel path input pipeline, a cooling path input pipeline and an air path input pipeline are communicated with the main air inlet pipeline through the multi-way valve; a main air inlet control valve is arranged on the main air inlet pipeline; a fuel path control valve is arranged on the fuel path input pipeline; a cooling path control valve is arranged on the cooling path input pipeline; an air path control valve is arranged on the air path input pipeline; the mounting plate is provided with a fixing piece used for fixing the mounting plate to a designated position. When the fuel cell testing device is used, the whole fuel cell testing device can be moved to the vicinity of a fuel cell according to needs, so that leakage detection operation can be carried out without moving the fuel cell, the leakage detection efficiency is high, and the damage risk caused by moving the fuel cell is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell leakage detection, in particular to a fuel cell leakage detection device. Background Art

[0002] Fuel cells have been widely used in industries such as energy, transportation, and electricity, and have the advantages of being pollution-free, carbon-free, and highly efficient.

[0003] Fuel cells convert chemical energy stored in fuel (such as hydrogen) and oxidants (such as air) into electrical energy. Compared with existing traditional energy conversion technologies, fuel cells have many advantages, including higher energy conversion efficiency, zero pollutant emissions, no moving parts and quiet operation. In membrane fuel cells, bipolar plates are the core components, accounting for a considerable proportion of the weight and cost of the entire fuel cell stack. The main functions they play are as follows: ① Structural support for the stack; ② Providing a flow channel (or "flow field") for the three media involved in the reaction, hydrogen, air and coolant for cooling the stack, while isolating the three media; ③ Conductive function, connecting each single cell in series into a whole stack.

[0004] Bipolar plates are generally made of a fuel plate and an oxidant plate stacked and welded or bonded together. After two or more bipolar plates are bonded and sealed together, a fuel gas cavity, an oxidant cavity, and a coolant cavity are formed. Leakage in any of the three cavities will directly affect the power generation efficiency, performance, and safety of the battery stack. Therefore, how to quickly test the sealing of the bipolar plate is very critical. The current more common detection method is to inject a certain pressure of test gas (usually compressed air) into each chamber, observe whether the pressure value decreases, and complete the sealing test of the hydrogen cavity, air cavity, and coolant cavity.

[0005] Traditional leak detection equipment is directly installed at the test gas supply point. After the fuel cell is assembled on the press, it can only be transported to the leak detection device for sealing testing, which is time-consuming and labor-intensive, and has low leak detection efficiency. At the same time, there is a certain risk of damage to the fuel cell during transportation. Utility Model Content

[0006] The utility model aims to provide a fuel cell leak detection device to improve the leak detection efficiency and reduce the risk of damage during the test.

[0007] In order to solve the above technical problems, the utility model provides a fuel cell leak detection device.

[0008] The fuel cell leak detection device of the utility model comprises a mounting plate and a total air intake pipeline, a fuel path input pipeline, a cooling path input pipeline and an air path input pipeline arranged on the mounting plate;

[0009] The main air intake pipeline is provided with a multi-way valve, and the fuel path input pipeline, the cooling path input pipeline and the air path input pipeline are connected to the main air intake pipeline through the multi-way valve;

[0010] The main air intake pipeline is provided with a main air intake control valve, and the main air intake control valve is used to control the fluid in the main air intake pipeline;

[0011] A fuel line control valve is provided on the fuel line input pipeline, and the fuel line control valve is used to control the fluid in the fuel line input pipeline;

[0012] A cooling circuit control valve is provided on the cooling circuit input pipeline, and the cooling circuit control valve is used to control the fluid in the cooling circuit input pipeline;

[0013] An air path control valve is provided on the air path input pipeline, and the air path control valve is used to control the fluid in the air path input pipeline;

[0014] The mounting plate is provided with a fixing piece for fixing the mounting plate at a specified position.

[0015] Furthermore, the fixing member includes a plurality of bolt assemblies arranged on the mounting plate.

[0016] Furthermore, the mounting plate is a square plate, and there are four bolt assemblies, which are respectively arranged near four corners of the square plate.

[0017] Furthermore, the multi-way valve is a four-way valve.

[0018] Furthermore, the fuel path control valve includes a fuel path switch valve and a fuel path flow regulating valve which are arranged at intervals.

[0019] Furthermore, the cooling path control valve includes a cooling path switch valve and a cooling path flow regulating valve which are arranged at intervals.

[0020] Furthermore, the air path control valve includes an air path switch valve and an air path flow regulating valve which are arranged at intervals.

[0021] Furthermore, the direction of the outlet of the fuel circuit input pipe is the same as the direction of the outlet of the cooling circuit input pipe, the direction of the inlet of the total air intake pipe is the same as the direction of the outlet of the air circuit input pipe, and the direction of the outlet of the fuel circuit input pipe is opposite to the direction of the outlet of the air circuit input pipe.

[0022] Furthermore, the fuel path input pipeline and the cooling path input pipeline are both U-shaped.

[0023] Furthermore, the air path input pipe is L-shaped.

[0024] Compared with the prior art, the utility model has at least the following beneficial effects:

[0025] When in use, since the leak detection pipelines such as the main air intake pipeline, the fuel line input pipeline, the cooling line input pipeline and the air line input pipeline are all arranged on the mounting plate, and the mounting plate is provided with fixing parts for fixing the mounting plate at a specified position, the entire fuel cell testing device can be moved and fixed to a specified position as needed, for example, moved and fixed near the fuel cell, so that the leak detection operation can be carried out without moving the fuel cell, the leak detection efficiency is high, and the risk of damage caused by moving the fuel cell is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an embodiment of a fuel cell leak detection device of the utility model;

[0027] Figure 2 for Figure 1 A schematic structural diagram of the fuel cell leak detection device from another perspective.

[0028] Reference numerals:

[0029] 10. Mounting plate; 11. Bolt assembly;

[0030] 21. Main air intake pipe; 22. Multi-way valve; 23. Main air intake control valve;

[0031] 31. Fuel line input pipeline; 32. Fuel line switch valve; 33. Fuel line flow regulating valve;

[0032] 41. Cooling circuit input pipeline; 42. Cooling circuit switch valve; 43. Cooling circuit flow regulating valve;

[0033] 51. Air input pipeline; 52. Air switch valve; 53. Air flow regulating valve. DETAILED DESCRIPTION

[0034] A fuel cell leak detection device of the present invention will be described below in conjunction with a schematic diagram, wherein a preferred embodiment of the present invention is shown. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as being widely known to those skilled in the art, and not as a limitation to the present invention.

[0035] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present utility model, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model 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 therefore cannot be understood as a limitation to the present utility model.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0038] The following is attached to the instruction manual Figure 1 and attached Figure 2 , the fuel cell leak detection device of the utility model is introduced.

[0039] In one embodiment, if Figure 1 and Figure 2 As shown, the fuel cell leak detection device includes a mounting plate 10 and a total air intake pipe 21, a fuel input pipe 31, a cooling input pipe 41, and an air input pipe 51 arranged on the mounting plate 10. A multi-way valve 22 is arranged on the total air intake pipe 21, and the fuel input pipe 31, the cooling input pipe 41, and the air input pipe 51 are connected to the total air intake pipe 21 through the multi-way valve 22.

[0040] The main air intake pipe 21 is used to introduce the test gas into the fuel cell leak detection device. The fuel path input pipe 31 is used to communicate with the fuel gas cavity of the fuel cell to be tested, the cooling path input pipe 41 is used to communicate with the coolant cavity of the fuel cell to be tested, and the air path input pipe 51 is used to communicate with the coolant cavity of the fuel cell to be tested.

[0041] The main air intake pipe 21 is provided with a main air intake control valve 23, and the main air intake control valve 23 is used to control the fluid in the main air intake pipe 21. The fuel line input pipe 31 is provided with a fuel line control valve, and the fuel line control valve is used to control the fluid in the fuel line input pipe 31. The cooling line input pipe 41 is provided with a cooling line control valve, and the cooling line control valve is used to control the fluid in the cooling line input pipe 41. The air line input pipe 51 is provided with an air line control valve, and the air line control valve is used to control the fluid in the air line input pipe 51.

[0042] When in use, since the leak detection pipelines such as the main air intake pipeline 21, the fuel path input pipeline 31, the cooling path input pipeline 41 and the air path input pipeline 51 are all arranged on the mounting plate 10, and the mounting plate 10 is provided with a fixing part for fixing the mounting plate 10 at a specified position, the entire fuel cell testing device can be moved and fixed to a specified position as needed, for example, moved and fixed near the fuel cell, so that the leak detection operation can be carried out without moving the fuel cell, the leak detection efficiency is high, and the risk of damage caused by moving the fuel cell is avoided.

[0043] In one embodiment, the fixing member includes a plurality of bolt assemblies 11 disposed on the mounting plate 10. Specifically, the bolt assemblies 11 include fixing bolts and fixing nuts, which cooperate to firmly fix the fuel cell leak detection device at a designated position.

[0044] Further, the mounting plate 10 is a square plate, and there are four bolt assemblies 11, which are respectively arranged near the four corners of the square plate. For example, the mounting plate 10 can be a rectangular plate, and mounting holes are arranged near the four corners of the rectangular plate, and the fixing bolts pass through the mounting holes, and the fixing nuts are installed on the fixing bolts. In other embodiments, the mounting plate 10 can also be a square plate.

[0045] In one embodiment, the multi-way valve 22 is a four-way valve. Specifically, the outlet of the main air intake pipeline 21 is fixed on the four-way valve, and the inlets of the fuel input pipeline 31, the cooling input pipeline 41 and the air input pipeline 51 are fixed on the four-way valve. Test gas is input into the main air intake pipeline 21, and the test gas can correspond to one or more pipelines of the fuel input pipeline 31, the cooling input pipeline 41 and the air input pipeline 51 through the four-way valve. In other embodiments, the multi-way valve 22 can also be a five-way valve or a six-way valve, so that other pipelines can be connected to the multi-way valve 22 according to needs.

[0046] In one embodiment, the fuel path control valve includes a fuel path switch valve 32 and a fuel path flow regulating valve 33 arranged at intervals. The fuel path switch valve 32 is used to control the on-off of the fuel path input pipeline 31, and the fuel path flow regulating valve 33 is used to fine-tune the flow of the fluid in the fuel path input pipeline 31. The fuel path switch valve 32 is located upstream of the fuel path flow regulating valve 33. When the fuel path switch valve 32 is in an open state so that the fuel path input pipeline 31 is in a passage, the fuel path flow regulating valve 33 can be adjusted as needed. In other embodiments, the fuel path switch valve 32 can also be located downstream of the fuel path flow regulating valve 33. In other embodiments, the fuel path flow regulating valve 33 may not be provided.

[0047] In one embodiment, the cooling circuit control valve includes a cooling circuit switch valve 42 and a cooling circuit flow regulating valve 43 arranged at intervals. The cooling circuit switch valve 42 is used to control the on-off of the cooling circuit input pipeline 41, and the cooling circuit flow regulating valve 43 is used to fine-tune the flow of the fluid in the cooling circuit input pipeline 41. The cooling circuit switch valve 42 is located upstream of the cooling circuit flow regulating valve 43. When the cooling circuit switch valve 42 is in an open state so that the cooling circuit input pipeline 41 is in a passage, the cooling circuit flow regulating valve 43 can be adjusted as needed. In other embodiments, the cooling circuit switch valve 42 can also be located downstream of the cooling circuit flow regulating valve 43. In other embodiments, the cooling circuit flow regulating valve 43 can also be not provided.

[0048] In one embodiment, the air path control valve includes an air path switch valve 52 and an air path flow regulating valve 53 arranged at intervals. The air path switch valve 52 is used to control the on-off of the air path input pipeline 51, and the air path flow regulating valve 53 is used to fine-tune the flow of the fluid in the air path input pipeline 51. The air path switch valve 52 is located upstream of the air path flow regulating valve 53. When the air path switch valve 52 is in an open state so that the air path input pipeline 51 is in a passage, the air path flow regulating valve 53 can be adjusted as needed. In other embodiments, the air path switch valve 52 can also be located downstream of the air path flow regulating valve 53. In other embodiments, the air path flow regulating valve 53 may not be provided.

[0049] In one embodiment, if Figure 1 and Figure 2 As shown, in order to facilitate the connection of each pipeline with each test chamber of the fuel cell to be tested, the direction of the outlet of the fuel path input pipeline 31 is the same as the direction of the outlet of the cooling path input pipeline 41, the direction of the inlet of the total air intake pipeline 21 is the same as the direction of the outlet of the air path input pipeline 51, and the direction of the outlet of the fuel path input pipeline 31 is opposite to the direction of the outlet of the air path input pipeline 51. Among them, the fuel path input pipeline 31 and the cooling path input pipeline 41 are both U-shaped, the air path input pipeline 51 is L-shaped, and the total air intake pipeline is straight.

[0050] During the test, the fuel cell test device is moved to a designated position, such as moved and fixed near the fuel cell, the total air intake pipe 21 is connected to the gas source, the fuel path input pipe 31 is connected to the fuel gas cavity of the fuel cell to be tested, the cooling path input pipe 41 is connected to the coolant cavity of the fuel cell to be tested, and the air path input pipe 51 is connected to the coolant cavity of the fuel cell to be tested, and then the control valves on each pipeline are adjusted accordingly according to the test needs, the gas source is opened, the test gas enters the corresponding pipeline, and then the pressure is measured. Since the leak detection can be performed without moving the fuel cell, the leak detection efficiency is high, thereby avoiding the risks caused by moving the fuel cell.

[0051] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A fuel cell leak detection device, characterized in that: It includes a mounting plate and a total air intake pipe, a fuel line input pipe, a cooling line input pipe and an air line input pipe arranged on the mounting plate; The main air intake pipeline is provided with a multi-way valve, and the fuel path input pipeline, the cooling path input pipeline and the air path input pipeline are connected to the main air intake pipeline through the multi-way valve; The main air intake pipeline is provided with a main air intake control valve, and the main air intake control valve is used to control the fluid in the main air intake pipeline; A fuel line control valve is provided on the fuel line input pipeline, and the fuel line control valve is used to control the fluid in the fuel line input pipeline; A cooling circuit control valve is provided on the cooling circuit input pipeline, and the cooling circuit control valve is used to control the fluid in the cooling circuit input pipeline; An air path control valve is provided on the air path input pipeline, and the air path control valve is used to control the fluid in the air path input pipeline; The mounting plate is provided with a fixing piece for fixing the mounting plate at a specified position.

2. The fuel cell leak detection device according to claim 1, characterized in that: The fixing member includes a plurality of bolt assemblies arranged on the mounting plate.

3. The fuel cell leak detection device according to claim 2, characterized in that: The mounting plate is a square plate, and there are four bolt assemblies, which are respectively arranged near the four corners of the square plate.

4. The fuel cell leak detection device according to claim 1, characterized in that: The multi-way valve is a four-way valve.

5. The fuel cell leak detection device according to claim 1, characterized in that: The fuel path control valve comprises a fuel path switch valve and a fuel path flow regulating valve which are arranged at intervals.

6. The fuel cell leak detection device according to claim 1, characterized in that: The cooling path control valve comprises a cooling path switch valve and a cooling path flow regulating valve which are arranged at intervals.

7. The fuel cell leak detection device according to claim 1, characterized in that: The air path control valve includes an air path switch valve and an air path flow regulating valve which are arranged at intervals.

8. The fuel cell leak detection device according to claim 1, characterized in that: The direction of the outlet of the fuel circuit input pipe is the same as the direction of the outlet of the cooling circuit input pipe, the direction of the inlet of the total air intake pipe is the same as the direction of the outlet of the air circuit input pipe, and the direction of the outlet of the fuel circuit input pipe is opposite to the direction of the outlet of the air circuit input pipe.

9. The fuel cell leak detection device according to claim 8, characterized in that: The fuel path input pipeline and the cooling path input pipeline are both U-shaped.

10. The fuel cell leak detection device according to claim 8, characterized in that: The air path input pipe is L-shaped.

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