Fuel cell stack press-fitting and sealing test integrated equipment

Abstract

The utility model discloses fuel cell stack press-fitting and sealing test integrated equipment which comprises a sealing test device, a sealing test air inlet device, a press-fitting bottom plate, a fuel cell stack, a sliding device and a press-fitting device, all layers of assemblies such as a bipolar plate and a membrane electrode assembly in the fuel cell stack are tightly pressed together according to preset pressure by controlling the press-fitting device, and the fuel cell stack is downwards pressed on the press-fitting bottom plate, so that after a gas inlet and a gas outlet at the bottom of the fuel cell stack are sealed, the fuel cell stack is pressed on the press-fitting bottom plate, and then the fuel cell stack is pressed on the press-fitting bottom plate. The sealing test air inlet device is opened to carry out air inlet operation on the interior of the fuel cell stack, the sealing test device on the press-fitting bottom plate is opened to test whether the stack seal leaks or not under the specified pressure in real time, the leakage problem can be found and solved before a fastener is locked, the workload required by repeatedly assembling and disassembling the fastener and moving the stack is omitted, and the working efficiency is improved. The sealing test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell detection and press-assembly, and in particular to an integrated device for fuel cell stack press-assembly and sealing test. Background Art

[0002] The fuel cell stack is the core component of hydrogen fuel cell vehicles. It is mainly composed of multiple fuel cell monomers, which are connected in series or in parallel to increase power. The fuel cell in the stack converts the chemical reaction between hydrogen and oxygen into electrical energy to power electric vehicles. During the assembly process of the fuel cell press-fitting device, the press-fitting equipment tightly assembles components such as the press plate, collector plate, bipolar plate and membrane electrode assembly together under a certain pressure. After the assembly is completed, fasteners such as screws and steel strips are used to ensure the stability and dimensional accuracy of the assembled parts. In order to verify the sealing performance of the stack, the stack needs to be tested for sealing after the assembly is completed. It is usually necessary to transfer the fuel cell stack from the press-fitting equipment to a special sealing test platform and pass air at a certain pressure for testing. However, when using the above test method for testing, if a sealing problem is found during the test, the stack needs to be transported back to the press-fitting platform for adjustment, which affects the progress and efficiency of the entire project. Utility Model Content

[0003] The main purpose of the utility model is to provide an integrated device for fuel cell stack press-assembly and sealing test, which can perform a stack sealing test when the fuel cell stack is pre-pressed.

[0004] In order to achieve the above effects, the utility model provides a fuel cell stack press-fit and sealing test integrated equipment, including: a sealing test device, a sealing test air intake device, a press-fit bottom plate, a fuel cell stack and a press-fit device;

[0005] The press-fit device is used to press-fit the fuel cell stack and control the fuel cell stack to be pressed down onto the press-fit bottom plate along the sliding device;

[0006] The sealing test air intake device is arranged on one of the side surfaces of the press-fit bottom plate;

[0007] The sealing test device is arranged on the other side surface of the press-fit bottom plate.

[0008] Furthermore, the sealing test device comprises a sealing test air intake pipe, and the air inlet of the sealing test air intake pipe is arranged in the fuel cell stack.

[0009] Furthermore, it also includes: a regulating valve, wherein the regulating valve is arranged on the sealing test air intake pipe.

[0010] Furthermore, it also includes: a press-fitting equipment base, and the press-fitting bottom plate is arranged on the press-fitting equipment base.

[0011] Furthermore, it also includes: a connecting rod, which is fixed to the surface of the fuel cell stack, penetrates the press-fit bottom plate and is inserted into the press-fit equipment base.

[0012] Furthermore, it also includes a guiding device; the guiding device includes: a slide rail and a slider; the guide rail passes through the press-fitting bottom plate and is inserted into the press-fitting equipment base; the fuel cell stack is slidably connected to the guide rail through the slider.

[0013] Furthermore, the press-fitting device includes a press-fitting positioning plate; the press-fitting positioning plate is arranged at the edge of the top of the fuel cell stack.

[0014] Furthermore, the sealing test device is threadedly connected to one of the side surfaces of the press-fit base plate.

[0015] Furthermore, the sealing test air intake device is threadedly connected to another side surface of the press-fit base plate.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] By controlling the pressing device, each layer of components in the fuel cell stack, such as bipolar plates, membrane electrode assemblies, etc., are pressed tightly together according to a predetermined pressure, and the fuel cell stack is pressed down on the pressing base plate. After the sealing of the air inlet and air outlet at the bottom of the fuel cell stack is completed, the sealing test air intake device is opened to perform air intake operation on the inside of the fuel cell stack, and the sealing test device on the pressing base plate is opened to test in real time whether the stack seal has leakage under the specified pressure. The leakage problem can be found and solved before locking the fasteners, eliminating the workload required for repeated installation and disassembly of fixings and moving the stack, thereby improving the efficiency of the sealing test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a fuel cell press-assembly device in one embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of a press-fit bottom plate in one embodiment of the utility model. DETAILED DESCRIPTION

[0020] The structure of a fuel cell press-assembly device of the utility model will be described below in conjunction with a schematic diagram, wherein a preferred embodiment of the utility model is shown. It should be understood that those skilled in the art can modify the utility model described herein and still achieve the advantageous effects of the utility model. Therefore, the following description should be understood as being widely known to those skilled in the art and not as a limitation to the utility model.

[0021] 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.

[0022] Please refer to Figure 1-Figure 2 This embodiment provides a fuel cell press-fitting and sealing device, including: a sealing test device 3, a sealing test air intake device 9, a press-fitting base plate 2, a fuel cell stack 12, a guide device 5 and a press-fitting device 6.

[0023] Specifically, the guiding device 5 is arranged on the press-fitting base plate 2 and is slidably connected to the fuel cell stack 12; the press-fitting device 6 is used to press-fit the fuel cell stack 12 and press the fuel cell stack 12 down onto the press-fitting base plate 2; the sealing test air intake device 9 is arranged on one of the side surfaces of the press-fitting base plate 2; the sealing test device 3 is arranged on the other side surface of the press-fitting base plate 2.

[0024] In this embodiment, the various layers of components in the fuel cell stack 12, such as bipolar plates, membrane electrode assemblies, etc., are tightly pressed together according to a predetermined pressure by controlling the pressing device 6, and after the fuel cell stack 12 is pressed tightly against the pressing base plate 2, the sealing test air intake device 9 is opened to perform air intake operation on the inside of the fuel cell stack 12, and the sealing test device 3 on the pressing base plate 2 is opened to test in real time whether the stack seal has leakage under the specified pressure, so that the leakage problem can be found and solved before locking the fasteners, eliminating the workload required for repeated installation and disassembly of fixing parts and moving the stack, thereby improving the sealing test efficiency.

[0025] In this embodiment, the integrated press-fitting and sealing test equipment for the fuel cell stack 12 also includes: a connecting rod 8, which is fixed on the fuel cell stack 12, passes through the press-fitting base plate 2 and is inserted into the press-fitting equipment base 1. During the press-fitting process, the connecting rod 8 will also move downward together with the fuel cell stack 12, thereby fixing the press-fitting base plate 2, the fuel cell stack 12 and the press-fitting equipment base 1.

[0026] In a specific embodiment, the press-fitting positioning plate is further provided with a through hole, and the through hole is used to pass the connecting rod 8. The press-fitting equipment base 1 is also provided with a slot for fixing the connecting rod 8.

[0027] In another specific embodiment, the press-fit bottom plate 2 and the connecting rod 8 are combined with the fuel cell stack assembly by welding, bolt connection or other fixing methods.

[0028] In this embodiment, the sealing test device 3 includes a sealing test air inlet pipe, and the air inlet of the sealing test air inlet pipe is arranged on one of the side surfaces of the press-fit bottom plate 2. The sealing test air inlet pipe is also provided with a regulating valve, which is used to adjust the flow and pressure of the gas.

[0029] During the press-fitting process, the sealing structure on the press-fitting bottom plate 2 can be tightly combined with the gas inlet and gas outlet of the fuel cell stack 12, thereby achieving sealing of the gas inlet and outlet.

[0030] In a specific embodiment, according to the test requirements, the air inlet of the sealing test air inlet duct can be directly connected to the internal flow channel of the fuel cell stack 12, allowing the test gas to directly enter the core area of ​​the fuel cell stack 12 to evaluate the sealing of the internal structure of the fuel cell stack 12. For example: the air inlet of the sealing test air inlet duct can be connected to the flow channel interface of the bipolar plate inside the fuel cell stack 12 to evaluate the sealing of the bipolar plate. In addition, in order to conduct a comprehensive test, multiple air inlets can be evenly distributed at multiple locations in the fuel cell stack 12, and the gas pressure and flow can be accurately adjusted using an automated control system to improve the accuracy and repeatability of the test.

[0031] In another specific embodiment, the sealing test air intake duct can be threadedly connected through a threaded hole 11 provided in one of the side surfaces of the press-fit base plate 2 .

[0032] In another specific embodiment, a pressure sensor may be provided in the sealing test device 3 to monitor the pressure of the test gas in real time so that the test can be performed within a predetermined pressure range. A leak detection sensor, such as a differential pressure sensor, a thermistor or a helium detector, may also be provided in the sealing test device 3 to detect and locate the leak point. In addition, the sealing test device 3 is connected to a computer system or a PLC (programmable logic controller) to achieve automatic control and data acquisition of the test process.

[0033] In this embodiment, the guide device 5 includes a guide rail and a slider; the guide rail passes through the press-fit bottom plate 2 and is inserted into the press-fit device base 1; the fuel cell stack 12 is slidably connected to the guide rail through the slider. The guide device 5 is used to guide the moving direction of the fuel cell stack 12 so that the fuel cell stack 12 will not shift during the press-fit process.

[0034] In a specific embodiment, a slot adapted to the guide rail is provided in the press-fitting equipment base 1, and a through hole adapted to the guide rail is provided on the press-fitting bottom plate 2 for fixing the guide rail and providing additional stability.

[0035] In another specific embodiment, the slider slides along the guide rail and is connected to the guide rail through a mechanical locking or roller mechanism. The fuel cell stack 12 is connected to the slider through a fixing device on the slider (for example: a clamp, a slot or a magnetic adsorption system), thereby achieving stable movement of the fuel cell stack 12 during the pressing process.

[0036] In this embodiment, the integrated fuel cell stack press-fitting and sealing test device further includes a press-fitting positioning plate 4, which is disposed on the top of the fuel cell stack 12. When the press-fitting device 6 presses the fuel cell stack 12, the press-fitting positioning plate 4 can help maintain the stability of the fuel cell stack assembly and prevent structural damage caused by uneven pressure or stack movement.

[0037] In a specific embodiment, the press-fit positioning plate 4 is designed with grooves and protrusions that match the protrusions and grooves at the top edge of the fuel cell stack 12, thereby achieving mutual cooperation between the press-fit positioning plate 4 and the top of the fuel cell stack 12, and the press-fit positioning plate 4 is fixed to the top edge of the fuel cell stack 12 by fasteners such as screws, bolts or clips.

[0038] In this embodiment, the integrated fuel cell stack press-fitting and sealing test equipment further includes: a press-fitting positioning accessory 7, which is used to assist in positioning the fuel cell stack 12 and prevent the fuel cell stack 12 from shifting during the press-fitting process.

[0039] In a specific embodiment, the press-fit positioning accessory 7 is provided with a threaded hole, and the press-fit positioning plate 4 is provided with a raised thread, and the press-fit positioning accessory 7 is fixed to the press-fit positioning plate 4 by tightening screws or bolts.

[0040] Preferably, the integrated equipment for press-fitting and sealing test of the fuel cell stack 12 further comprises: a press-fitting side plate, which is used to seal the two surfaces of the fuel cell stack 12, and the sealing can be implemented after the sealing test.

[0041] Preferably, the pressing device 6 is a pressing machine, which presses the various layers of components in the fuel cell stack 12, such as bipolar plates, membrane electrode assemblies, etc., tightly together according to a predetermined pressure to form a sealed and structurally stable stack, and controls the fuel cell stack 12 to be pressed tightly against the pressing base plate 2 along the guide device 5.

[0042] To summarize, by controlling the pressing device 6, the various layers of components in the fuel cell stack 12, such as bipolar plates and membrane electrode assemblies, are tightly pressed together according to a predetermined pressure, and after the fuel cell stack 12 is pressed tightly against the pressing base plate 2 along the guide device 5, the sealing test air intake device 9 is opened to perform air intake operation on the inside of the fuel cell stack 12, and the sealing test device 3 on the pressing base plate 2 is opened to test in real time whether the stack seal has leakage under the specified pressure, thereby realizing the integration of pressing and sealing testing, optimizing the operating process, eliminating the workload required for repeated installation and disassembly of fixings and moving the stack, and improving the sealing test efficiency.

[0043] 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 stack press assembly and sealing test integrated equipment, characterized in that: include: Sealing test device, sealing test air intake device, press-fit bottom plate, fuel cell stack and press-fit device; The press-fit device is used for press-fitting the fuel cell stack, and is also used for controlling the fuel cell stack to be pressed down onto the press-fit bottom plate; The sealing test air intake device is arranged on one of the side surfaces of the press-fit bottom plate; The sealing test device is arranged on the other side surface of the press-fit bottom plate.

2. The integrated fuel cell stack press assembly and sealing test equipment according to claim 1, characterized in that: The sealing test device comprises a sealing test air intake duct; The air inlet of the sealing test air inlet duct is arranged in the fuel cell stack.

3. The integrated fuel cell stack press assembly and sealing test equipment according to claim 2, characterized in that: Also includes: Regulating valves; The regulating valve is arranged on the sealing test air intake pipe.

4. The integrated fuel cell stack press assembly and sealing test equipment according to claim 1, characterized in that: Also includes: Press-fit equipment base; The press-fitting bottom plate is arranged on the press-fitting equipment base.

5. The integrated fuel cell stack press assembly and sealing test equipment according to claim 4, characterized in that: Also includes: Connecting rod; The connecting rod is fixed on the surface of the fuel cell stack, penetrates through the press-fit bottom plate and is inserted into the press-fit equipment base.

6. The integrated fuel cell stack press assembly and sealing test equipment according to claim 4, characterized in that: Also included is a guide device; The guide device comprises: a slide rail and a slide block; The slide rail passes through the press-fit bottom plate and is inserted into the press-fit equipment base; The fuel cell stack is slidably connected to the slide rail via the slide block.

7. The integrated fuel cell stack press assembly and sealing test equipment according to claim 1, characterized in that: Also included is a press-fit positioning plate; The press-fit positioning plate is fixed at the edge of the top of the fuel cell stack.

8. The integrated fuel cell stack press assembly and sealing test equipment according to claim 7, characterized in that: Also includes: Press-fit positioning accessories; The press-fit positioning fitting is fixed to the press-fit positioning plate and the edge of the top of the fuel cell stack.

9. The integrated fuel cell stack press assembly and sealing test equipment according to claim 1, characterized in that: The press-fitting device is a press-fitting machine.

10. The integrated fuel cell stack press assembly and sealing test equipment according to claim 1, characterized in that: The sealing test device is threadedly connected to one of the side surfaces of the press-fit bottom plate, and the sealing test air intake device is threadedly connected to the other side surface of the press-fit bottom plate.

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