Carbon paper intrusion amount detection device and detection method

Abstract

The application provides a carbon paper invasion amount detection device and a detection method. The carbon paper invasion amount detection device comprises a distance measuring assembly, a first electrode plate and a second electrode plate. The first electrode plate has a first surface and a second surface. A first flow channel is arranged on the first surface, and a first detection through hole is arranged on the second surface. The second electrode plate has a third surface which is a light surface and a fourth surface which is provided with a second flow channel. The first surface is arranged opposite to the third surface and the fourth surface in sequence. The distance measuring assembly is configured to detect the distance between the first membrane electrode carbon paper attached to the first surface and the second electrode plate under a set pressure through the first detection through hole. Through the above scheme, the actual invasion amount of the carbon paper invading the flow channel can be effectively detected, accurate data for fuel cell stack development is provided, the research on the relationship between different parameters and invasion amount in the fuel cell stacking process is helpful, the development accuracy of the fuel cell stack is improved, and the reliability of the fuel cell stack is improved.

Description

Technical Field

[0001] This application relates to the field of fuel cell technology, and in particular to a carbon paper intrusion detection device and detection method. Background Technology

[0002] In related technologies, fuel cell stacks typically consist of multiple layers of bipolar plates and membrane electrode assemblies arranged in an alternating pattern and stacked together. The membrane electrode assembly includes a proton exchange membrane, cathode and anode gas diffusion layers located on opposite sides of the proton exchange membrane, a cathode catalyst layer between the proton exchange membrane and the cathode gas diffusion layers, and an anode catalyst layer between the proton exchange membrane and the anode gas diffusion layers. Since the gas diffusion layer is made of carbon paper, which is a porous elastomer, during the fuel cell stack stack assembly process, the carbon paper can intrude into the flow channels of adjacent bipolar plates under the pressure of the assembly. This intrusion reduces the cross-sectional area of ​​the flow channels, decreasing the space available for fluid flow. This increases flow resistance, reduces fluid flow smoothness, and negatively impacts fuel cell performance.

[0003] The amount of carbon paper intrusion into the flow channel is related to the transport of gas, water vapor, heat, and electrons within the flow channel, as well as the mechanical support of the proton exchange membrane. Therefore, the amount of carbon paper intrusion has a significant impact on the overall performance of the fuel cell.

[0004] Because fuel cell stacks are enclosed assembly structures and carbon paper has small macroscopic dimensions, the amount of carbon paper intrusion is currently obtained through CAE (Computer Aided Engineering) simulation based on material properties and structural form. There is no effective means to directly detect the amount of carbon paper intrusion, and the lack of real carbon paper intrusion detection data affects the accuracy of fuel cell technology development. Summary of the Invention

[0005] This application provides a carbon paper intrusion detection device and method to at least solve the above-mentioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, a carbon paper intrusion detection device is provided. The carbon paper intrusion detection device includes a ranging component, a first electrode plate, and a second electrode plate. The first electrode plate has a first surface and a second surface disposed opposite to each other. A first flow channel is provided on the first surface, and a first detection through-hole is provided on the second surface. The end of the first detection through-hole near the first surface communicates with the first flow channel. The second electrode plate has a smooth third surface and a fourth surface disposed with a second flow channel, and is stacked with the first electrode plate. In a first state, the first surface is configured to face the third and fourth surfaces sequentially. The ranging component is configured to detect the distance between the second electrode plate, which is attached to the first surface via the third surface, and the first electrode plate, which is subjected to a set pressure, under the first detection through-hole, and to detect the distance between the first membrane electrode carbon paper, which is attached to the first surface, and the first electrode plate, which is subjected to a set pressure.

[0007] Optionally, the second surface is smooth, and a second detection through-hole is provided on the third surface. The end of the second detection through-hole near the fourth surface is connected to the second flow channel. When the first electrode plate and the second electrode plate are stacked, the first detection through-hole and the second detection through-hole are misaligned. In the second state, the fourth surface is configured to face the second surface and the first surface in sequence. The ranging component is configured to detect the distance between the first electrode plate attached to the fourth surface through the second surface and the fourth surface under a set pressure through the second detection through-hole, and to detect the distance between the first membrane electrode carbon paper attached to the first surface and the fourth surface under a set pressure.

[0008] Optionally, the second detection through hole is a tapered hole, and the small diameter end of the second detection through hole is located closer to the fourth surface than the large diameter end of the second detection through hole;

[0009] And / or, the first detection through hole is a tapered hole, and the smaller diameter end of the first detection through hole is positioned closer to the first surface than the larger diameter end of the first detection through hole.

[0010] Optionally, the carbon paper intrusion detection device further includes a guide rail mechanism, on which the probe of the ranging component is slidably disposed. In the first state, the probe of the ranging component is configured to move to one end of the first detection through hole under the guidance of the guide rail mechanism to measure the distance between the portion of the first film electrode carbon paper and the second electrode plate facing the first detection through hole and the probe of the ranging component; in the second state, the probe of the ranging component is configured to move to one end of the second detection through hole under the guidance of the guide rail mechanism to measure the distance between the portion of the second film electrode carbon paper and the first electrode plate facing the second detection through hole and the probe of the ranging component.

[0011] Optionally, the guide rail mechanism includes a guide rail, a slider, and a mounting plate. The guide rail is located on one side of the first pole plate, the slider is slidably mounted on the guide rail, one end of the mounting plate is connected to the slider, and the probe of the ranging component is mounted on the mounting plate.

[0012] Optionally, the carbon paper intrusion detection device also includes a press device, which includes a frame, a press head, and a linear drive device. The frame has a bearing surface, the first electrode plate and the second electrode plate are stacked on the bearing surface, the press head is slidably disposed on the frame, and the linear drive device is installed on the frame and connected to the press head to drive the press head away from or towards the first electrode plate along the stacking direction.

[0013] Optionally, the carbon paper intrusion detection device also includes a base, which is disposed on a bearing surface. In a first state, a first electrode plate is installed at the end of the base away from the bearing surface, and a second electrode plate is located on the side of the first electrode plate away from the base. In a second state, the second electrode plate is installed at the end of the base away from the bearing surface, and the first electrode plate is located on the side of the second electrode plate away from the base.

[0014] Optionally, a mounting groove is provided at one end of the base away from the bearing surface, and the ranging component is disposed in the mounting groove; wherein, at least one end of the mounting groove is an open end; And / or, the width of the mounting slot opening is less than the width of the mounting slot bottom surface.

[0015] Optionally, it also includes a pressure detection element, which is used to detect the pressure value on the first surface in a first state and to detect the pressure value on the fourth surface in a second state.

[0016] According to a second aspect of this application, a method for detecting carbon paper intrusion is provided, applied to the aforementioned carbon paper intrusion detection device, the method comprising: Calibration of distance h10 between reference surfaces: The first electrode plate and the second electrode plate are stacked, with the first surface and the smooth surface of the second electrode plate in flat contact. The second electrode plate is pressed against the first electrode plate to apply a pressure of F1 to the second electrode plate, and the distance h10 between itself and the smooth surface of the second electrode plate is measured by the ranging component. Detection of distance h11 after carbon paper intrusion: The first electrode plate, the first membrane electrode carbon paper, the second membrane electrode carbon paper, and the second electrode plate are stacked in sequence, with the first surface flat against the first membrane electrode carbon paper and the fourth surface flat against the second membrane electrode carbon paper; the second electrode plate is pressed against the first electrode plate to apply a pressure of F1, causing the part of the first membrane electrode carbon paper opposite to the first flow channel to intrude into the first flow channel, forming the first intrusion part; the distance h11 between itself and the first intrusion part is measured by the ranging component; Calculate the intrusion amount δh1: Based on the distances h11 and h10, the intrusion amount δh1 of the carbon paper of the first membrane electrode into the first flow channel is obtained.

[0017] Optionally, it also includes the calibration of the surface pressure of the first membrane electrode carbon paper: the first electrode plate, the pressure detection element, the first membrane electrode carbon paper, the second membrane electrode carbon paper and the second electrode plate are stacked in sequence, with the first surface flat against the first membrane electrode carbon paper and the fourth surface flat against the second membrane electrode carbon paper; the second electrode plate is pressed against the first electrode plate to apply a pressure of F1 to the second electrode plate, and the pressure is read by the pressure detection element; And / or, adjust the value of F1 and repeat the measurement operation to obtain the amount of penetration δh1 of the carbon paper of the first membrane electrode under different pressures.

[0018] Beneficial effects: In the carbon paper intrusion detection device of this application embodiment, by setting the carbon paper intrusion detection device, the actual intrusion amount of carbon paper into the flow channel can be effectively detected, providing accurate data for fuel cell stack development, which helps to analyze the relationship between different parameters and intrusion amount during fuel cell stacking, and is conducive to improving the accuracy of fuel cell stack development, thereby improving the reliability of fuel cell stack.

[0019] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0022] Figure 1 This is a schematic diagram of the carbon paper intrusion detection device provided in an exemplary embodiment of this application; Figure 2 This is an assembly diagram showing the calibration of the reference surface provided in an exemplary embodiment of this application; Figure 3 This is a schematic diagram of the carbon paper intrusion height detection assembly provided in an exemplary embodiment of this application; Figure 4 This is a schematic diagram of carbon paper intrusion height detection provided in an exemplary embodiment of this application; Figure 5 This is a schematic diagram of the carbon paper surface pressure calibration assembly provided in an exemplary embodiment of this application; Figure 6 This is a schematic diagram of the structure of the second electrode plate provided in an exemplary embodiment of this application; Figure 7 This is a schematic diagram of the cooperation between the guide rail mechanism and the ranging component provided in an exemplary embodiment of this application; Figure 8 This is a schematic diagram of another carbon paper intrusion detection device provided in an exemplary embodiment of this application; Figure 9 This is a schematic diagram of the structure of the base provided in an exemplary embodiment of this application; Figure 10 This is a schematic diagram of the base and the ranging component in an exemplary embodiment of this application. Figure 11 This is a schematic diagram of the base and the ranging component provided in an exemplary embodiment of this application from another viewpoint. Figure 12 This is a schematic flowchart of the carbon paper intrusion detection method provided in an exemplary embodiment of this application.

[0023] Explanation of reference numerals in the attached figures: 10-Carbon paper intrusion detection device; 11-First electrode plate; 111-First surface; 112-Second surface; 113-First flow channel; 114-First detection through hole; 12-Second electrode plate; 121-Third surface; 122-Fourth surface; 123-Second flow channel; 124-Second detection through hole; 13-Guide rail mechanism; 131-Guide rail; 132-Slider; 133-Mounting plate; 134-Threaded hole; 135-Fixed seat; 136-Bolt; 14-Pressing equipment; 141-Frame; 1411-Bearing surface; 142-Press head; 143-Linear drive device; 15-Base; 151-Mounting slot; 16-Pressure detection element; 17-Distance measuring assembly; 171-Probe; 172-Wire harness; 21-First membrane electrode carbon paper; 22-Second membrane electrode carbon paper. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0025] Please see Figure 1In a first aspect, embodiments of this application provide a carbon paper intrusion detection device 10. The carbon paper intrusion detection device 10 includes a ranging component 17, a first electrode plate 11, and a second electrode plate 12. The first electrode plate 11 has a first surface 111 and a second surface 112 disposed opposite to each other. A first flow channel 113 is provided on the first surface 111. A first detection through-hole 114 is provided on the second surface 112. One end of the first detection through-hole 114 near the first surface 111 communicates with the first flow channel 113. The second electrode plate 12 has a smooth third surface 121 and a fourth surface 122 provided with a second flow channel 123, and is stacked with the first electrode plate 11. In the first state, the first surface 111 is configured to face the third surface 121 and the fourth surface 122 in sequence. The ranging component 17 is configured to detect the distance between the second electrode plate 12, which is attached to the first surface 111 through the third surface 121, under a set pressure, and the distance between the first membrane electrode carbon paper 21, which is attached to the first surface 111, under a set pressure, through the first detection through hole 114.

[0026] Specifically, in the first state, the probe 171 of the ranging component 17 is located at the end of the first detection through-hole 114 away from the second electrode plate 12.

[0027] It is understandable that the pressure range is set to the pressure when stacking battery cells.

[0028] It is understood that the arrangement of the first detection hole 114 on the first electrode plate 11 is based on the premise of not affecting the overall structural strength of the first electrode plate 11. Specifically, the specific setting position of the first detection hole on the first electrode plate 11 and the material selection of the first cathode plate can be confirmed through CAE simulation. Among them, CAE simulation can confirm that the stress of the first electrode plate 11 does not exceed the yield strength and that the strain of the first electrode plate 11 is sufficiently small to not affect the detection of carbon paper intrusion.

[0029] It is understandable that the smooth surface is used as the reference surface for calibrating the carbon paper intrusion amount, so the smooth surface needs to be flat to reduce measurement errors and improve measurement accuracy.

[0030] For example, the ranging component 17 can be a laser ranging component, an infrared rangefinder, an ultrasonic rangefinder, a radar rangefinder, a microwave rangefinder, etc. A laser ranging component is a device that measures distance based on the principle of laser reflection ranging. Specifically, the laser ranging component may include a power supply, a photoelectric component, a laser probe, a wiring harness, etc. In the first state, the laser probe is located at the end of the first detection through-hole 114 opposite to the second electrode plate 12. In use, the control module of the laser ranging component triggers the laser diode of the photoelectric component, causing the laser diode to emit laser light, and records the laser emission time as t1. After the laser light irradiates the component attached to the first surface 111, it is reflected. The reflected laser light irradiates the laser probe and is focused by the focusing lens of the receiving module of the laser probe onto the photodetector. The detector converts the light signal into an electrical signal, and the control module records the receiving time t2. Based on the time difference Δt=t2... Given t1 and the laser velocity c, the distance L between the ranging component 17 and the component attached to the first surface 111 can be obtained as L = (c Δt) / 2. The wiring harness uploads the distance data measured by the laser ranging component to the data receiving end, so as to record and analyze the relationship between the carbon paper intrusion amount and other parameters, thereby improving the accuracy of fuel cell technology development. The ranging component 17 has a detection accuracy of μm and a detection frequency of ms or μs. The wiring harness 172 can be connected to a computer to transmit the detection data to the computer in real time and generate a time-domain detection displacement curve.

[0031] The process of measuring the amount of penetration of the carbon paper 21 of the first membrane electrode corresponding to the first electrode plate 11 into the first flow channel 113 is as follows: S101, Calibration of reference plane distance h10: (e.g.) Figure 2 As shown, the first electrode plate 11 and the second electrode plate 12 are stacked, with the first surface 111 and the smooth surface (i.e., the third surface 121) of the second electrode plate 12 facing each other and flat. The second electrode plate 12 is pressed against the first electrode plate 11 to apply a pressure of F1 to the second electrode plate 12, and the distance h10 between itself and the smooth surface of the second electrode plate 12 is measured by the ranging component 17. S102, Detection of distance h11 after carbon paper intrusion: such as Figure 3 As shown, the first electrode plate 11, the first membrane electrode carbon paper 21, the second membrane electrode carbon paper 22, and the second electrode plate 12 are stacked sequentially, with the first surface 111 and the fourth surface 122 facing each other, and the first surface 111 and the first membrane electrode carbon paper 21 are flatly attached, and the fourth surface 122 and the second membrane electrode carbon paper 22 are flatly attached; the second electrode plate 12 is pressed against the first electrode plate 11 to apply a pressure of F1 to the second electrode plate 12, so that the part of the first membrane electrode carbon paper 21 that is opposite to the first flow channel 113 penetrates into the first flow channel 113 to form a first intrusion part; the distance h11 between itself and the first intrusion part is measured by the ranging component 17; S103. Calculate the intrusion amount δh1: Based on the distance h11 between the ranging component 17 and the first intrusion part, and the distance h10 between the ranging component 17 and the smooth surface of the second electrode plate 12, the intrusion amount δh1 of the first film electrode carbon paper 21 into the first flow channel 113 is obtained as follows: δh1 = h10 - h11. Figure 4 As shown.

[0032] The above process can be repeated to adjust the value of F1, thereby obtaining the intrusion amount δh1 of the first membrane electrode carbon paper 21 under different pressures. A curve can be plotted based on the correspondence between the value of F1 and the intrusion amount δh1. This curve can be used to set the groove ridge width ratio of the first electrode plate 11, the depth and contour structure of the groove of the first flow channel 113, and the selection of the first membrane electrode carbon paper 21 (e.g., carbon paper modulus and carbon paper thickness) to obtain a lower carbon paper intrusion amount and improve the smoothness of fluid flow.

[0033] It is understandable that the components attached to the first surface 111 are the second electrode plate 12 and the first film electrode carbon paper 21.

[0034] The first electrode plate 11 can be either a cathode plate or an anode plate. For example, the first electrode plate 11 is a cathode plate, and the second electrode plate 12 is an anode plate. Correspondingly, the first membrane electrode carbon paper 21 is a cathode membrane electrode carbon paper, and the second membrane electrode carbon paper 22 is an anode membrane electrode carbon paper.

[0035] It is understood that the force applied to the carbon paper intrusion detection device 10 to generate pressure on the first surface can be applied manually, applied using a pressure device, or applied using a weight. When applying pressure manually, a pressure sensor is required to ensure the pressure is consistent in steps S101, S102, and S104 of each measurement cycle.

[0036] In this embodiment, the carbon paper intrusion detection device 10 can effectively detect the actual intrusion amount of carbon paper into the flow channel, providing accurate data for fuel cell stack development. This helps to analyze the relationship between different parameters and intrusion amount during fuel cell stacking, thereby improving the accuracy of fuel cell stack development and enhancing the reliability of fuel cell stacks.

[0037] Please see Figure 6In some embodiments, the second surface 112 is smooth. A second detection through-hole 124 is provided on the third surface 121. The end of the second detection through-hole 124 near the fourth surface 122 communicates with the second flow channel 123. When the first electrode plate 11 and the second electrode plate 12 are stacked, the first detection through-hole 114 and the second detection through-hole 124 are misaligned. In the second state, the fourth surface 122 is configured to face the second surface 112 and the first surface 111 in sequence. The ranging component 17 is configured to detect the distance between the first electrode plate 11, which is attached to the fourth surface 122 through the second surface 112, under a set pressure, and the distance between the second membrane electrode carbon paper 22, which is attached to the fourth surface 122, and the second membrane electrode carbon paper 22, which is attached to the fourth surface 122, under a set pressure, through the second detection through-hole 124. Thus, by providing a second detection through hole 124 on the second electrode plate 12, the intrusion amount δh2 of the carbon paper 22 of the second membrane electrode can be measured using the second electrode plate 12, thereby reducing the number of components in the carbon paper intrusion detection device 10.

[0038] Specifically, in the second state, the probe 171 of the ranging component 17 is located at the end of the second detection through-hole 124 away from the first electrode plate 11.

[0039] It is understandable that after measuring the amount of penetration of the first membrane electrode carbon paper 21 into the first flow channel 113, the positions of the first electrode plate 11 and the second electrode plate 12 can be interchanged, and the amount of penetration of the second membrane electrode carbon paper 22 into the second flow channel 123 can be measured according to the operation method for measuring the amount of penetration of the first membrane electrode carbon paper 21 into the first flow channel 113.

[0040] The process of measuring the amount of penetration of the carbon paper 22 of the second membrane electrode corresponding to the second electrode plate 12 into the second flow channel 123 is as follows: S201, Calibration of reference plane distance h20: The second electrode plate 12 and the first electrode plate 11 are stacked, the fourth surface 122 of the second electrode plate 12 is set facing and flat against the second surface 112 of the first electrode plate 11, the first electrode plate 11 is pressed against the second electrode plate 12 to apply a pressure of F2 to the first electrode plate 11, and the distance h20 between itself and the smooth surface of the first electrode plate 11 is measured by the ranging component 17. S202, Detection of distance h21 after carbon paper intrusion: The second electrode plate 12, the second membrane electrode carbon paper 22, the first membrane electrode carbon paper 21, and the first electrode plate 11 are stacked in sequence, with the fourth surface 122 facing the first surface 111, and the fourth surface 122 and the second membrane electrode carbon paper 22 are flatly attached, and the first surface 111 and the first membrane electrode carbon paper 21 are flatly attached; the first electrode plate 11 is pressed against the second electrode plate 12 to apply a pressure of F2 to the first electrode plate 11, so that the part of the second membrane electrode carbon paper 22 opposite to the second flow channel 123 intrudes into the second flow channel 123 to form a second intrusion part; the distance h21 between itself and the second intrusion part is measured by the ranging component 17; S203. Based on the distance h21 between itself and the second intrusion part measured by the ranging component 17 and the distance h20 between itself and the smooth surface of the first electrode plate 11 measured by the ranging component 17, the intrusion amount δh2=h10-h11 of the second membrane electrode carbon paper 22 intruding into the second flow channel 123 is obtained.

[0041] The above process can be repeated to adjust the value of F2, thereby obtaining the intrusion amount δh2 of the carbon paper 22 of the second membrane electrode under different pressures. A curve can be plotted based on the correspondence between the value of F2 and the intrusion amount δh2. This curve can be used to set the groove ridge width ratio of the second electrode plate 12, the depth and contour structure of the groove of the second flow channel 123, and the selection of the carbon paper 22 of the second membrane electrode (e.g., carbon paper modulus and carbon paper thickness) in order to obtain a lower carbon paper intrusion amount and improve the smoothness of fluid flow.

[0042] It is understandable that the components attached to the fourth surface 122 are the first electrode plate 11 and the second film electrode carbon paper 22.

[0043] Please see Figure 6 In some embodiments, the second detection through-hole 124 is a tapered hole. The smaller diameter end of the second detection through-hole 124 is positioned closer to the fourth surface 122 than the larger diameter end. This reduces the obstruction of the flatness of the hole wall of the second detection through-hole 124 to the measurement, allowing signals emitted from the smaller diameter end of the second detection through-hole 124 to be used for distance measurement, thereby improving measurement efficiency and ease of operation.

[0044] Please see Figure 2 In some embodiments, the first detection through-hole 114 is a tapered hole, and the smaller diameter end of the first detection through-hole 114 is positioned closer to the first surface 111 than the larger diameter end of the first detection through-hole 114. This reduces the obstruction of the flatness of the hole wall of the first detection through-hole 114 to the measurement, allowing signals emitted from the smaller diameter end of the first detection through-hole 114 to be used for distance measurement, thereby improving measurement efficiency and ease of operation.

[0045] Please see Figure 7In some embodiments, the carbon paper intrusion detection device 10 further includes a guide rail mechanism 13. The probe 171 of the ranging component 17 is slidably disposed on the guide rail mechanism 13. Specifically, in a first state, the probe 171 of the ranging component 17 is configured to move under the guidance of the guide rail mechanism 13 to one end of the first detection through-hole 114 to measure the distance between the portion of the first membrane electrode carbon paper 21 and the second electrode plate 12 facing the first detection through-hole 114 and the probe 171 of the ranging component 17; in a second state, the probe 171 of the ranging component 17 is configured to move under the guidance of the guide rail mechanism 13 to one end of the second detection through-hole 124 to measure the distance between the portion of the second membrane electrode carbon paper 22 and the first electrode plate 11 facing the second detection through-hole 124 and the probe 171 of the ranging component 17. Thus, by adjusting the position of the ranging component 17, the signal emitted by the ranging component 17 can be used for distance measurement, thereby reducing the positional accuracy requirements of components such as the first electrode plate 11, improving detection efficiency, and reducing detection difficulty.

[0046] The guide rail mechanism 13 has damping characteristics, which enables the ranging component 17 to maintain positional stability relative to the guide rail mechanism 13 when adjusted to any position, without moving or shaking arbitrarily.

[0047] Specifically, when measuring the penetration amount of the carbon paper of the first electrode, the probe 171 of the ranging component 17 can move to one end of the first detection through hole 114 under the guidance of the guide rail mechanism 13. Correspondingly, when measuring the penetration amount of the carbon paper 22 of the second membrane electrode, the probe 171 of the ranging component 17 can move to one end of the second detection through hole 124 under the guidance of the guide rail mechanism 13.

[0048] It is understandable that in the first state and the second state, the probe 171 of the ranging component 17 needs to be aligned with the openings of the first detection through hole 114 and the second detection through hole 124 along the path of the guide rail mechanism 13.

[0049] It is understandable that the guide rail mechanism 13 can be moved manually, driven by a linear motor, or driven by a rotary motor through a ball screw mechanism.

[0050] Please see Figure 7 In some embodiments, the guide rail mechanism 13 includes a guide rail 131, a slider 132, and a mounting plate 133. The guide rail 131 is located on one side of the first pole plate 11, the slider 132 is slidably disposed on the guide rail 131, one end of the mounting plate 133 is connected to the slider 132, and the probe 171 of the ranging component 17 is mounted on the mounting plate 133. This design simplifies the structure of the guide rail mechanism 13 and helps reduce detection costs.

[0051] Specifically, the mounting plate 133 is provided with a threaded hole 134, and a fixing seat 135 is installed on the probe 171 of the ranging component 17. The end of the shank of the bolt 136 passes through the through hole of the fixing seat 135 and is threadedly connected to the threaded hole 134, thereby fixing the probe 171 of the ranging component 17 on the mounting plate 133.

[0052] Please see Figure 8 In some embodiments, the carbon paper intrusion detection device 10 further includes a press device 14. The press device 14 includes a frame 141, a press head 142, and a linear drive device 143. The frame 141 has a bearing surface 1411. The first electrode plate 11 and the second electrode plate 12 are stacked on the bearing surface 1411. The press head 142 is slidably disposed on the frame 141, and the linear drive device 143 is mounted on the frame 141 and connected to the press head 142 to drive the press head 142 away from or towards the first electrode plate 11 along the stacking direction. In this way, pressure is generated by the press device 14, resulting in good pressure consistency and simple operation, which helps to improve detection efficiency and data accuracy.

[0053] It is understood that the press equipment 14 has at least the functions of adjusting pressure, real-time pressure display, pressure holding, and tightening and loosening.

[0054] Please see Figure 8 , Figure 9 , Figure 10 and Figure 11 In some embodiments, the carbon paper intrusion detection device 10 further includes a base 15. The base 15 is disposed on the bearing surface 1411. In a first state, the first electrode plate 11 is mounted on the end of the base 15 away from the bearing surface 1411, and the second electrode plate 12 is located on the side of the first electrode plate 11 away from the base 15. In a second state, the second electrode plate 12 is mounted on the end of the base 15 away from the bearing surface 1411, and the first electrode plate 11 is located on the side of the second electrode plate 12 away from the base 15. Thus, by supporting the first electrode plate 11 and the second electrode plate 12 with the base 15, the base 15 can be configured to support different structures and dimensions of the first electrode plate 11 and the second electrode plate 12, thereby improving measurement accuracy. Furthermore, compared to precision machining the entire bearing surface 1411 to improve the support stability of the first electrode plate 11 and the second electrode plate 12, machining the base 15 separately can reduce machining difficulty and improve manufacturing efficiency.

[0055] Please see Figures 8 to 11 In some embodiments, a mounting groove 151 is provided at the end of the base 15 away from the bearing surface 1411, and the ranging component 17 is disposed in the mounting groove 151. In this way, the structural compactness of the carbon paper intrusion detection device 10 can be improved, and the ranging component 17 can be protected by the base 15, reducing the damage to the ranging component 17 due to impact and reducing detection costs.

[0056] Specifically, the guide rail mechanism 13 is installed on the bottom surface of the mounting groove 151. Correspondingly, in order to improve the installation stability of the guide rail mechanism 13, a mating structure for the positioning guide rail 131 can be provided on the bottom surface of the mounting groove 151.

[0057] It is understandable that the mounting slot 151 must meet both structural installation requirements and strength requirements, and must not affect the detection of carbon paper intrusion. Specifically, CAE simulation can be used to confirm the structural features and material selection of the base 15.

[0058] Please see Figure 9 In some embodiments, at least one end of the mounting slot 151 is an open end. This allows the ranging component 17 to be installed and maintained through the open end, improving the convenience and efficiency of assembly and maintenance.

[0059] It can be understood that the part of the mounting groove 151 that is opposite to the end of the guide rail 131 of the guide rail mechanism 13 is the groove end.

[0060] Please see Figure 9 In some embodiments, the width of the opening of the mounting groove 151 is smaller than the width of the bottom surface of the mounting groove 151. This gives the base 15 a larger support surface, which helps to improve the stability of the base 15 in supporting the first electrode plate 11 and the second electrode plate 12.

[0061] In some embodiments, a pressure detection element 16 is further included. In a first state, the pressure detection element 16 is used to detect the pressure value received by the first surface 111; in a second state, the pressure detection element 16 is used to detect the pressure value received by the fourth surface 122. Thus, the pressure detection element 16 can collect and provide feedback on the pressure information received by the first surface 111 and the fourth surface 122, thereby improving measurement accuracy.

[0062] For example, the pressure detection element 16 can be a sheet-like pressure detection element 16. The sheet-like pressure detection element 16 is a type of thin, planar pressure sensor. Based on the detection principle, it can be mainly divided into: resistive sheet-like pressure detection elements 16, capacitive sheet-like pressure detection elements 16, piezoelectric sheet-like pressure detection elements 16, and piezoresistive semiconductor sheet-like detection elements, etc. The pressure detection element 16 has a pressure detection function, and its structural characteristics do not affect the contact state of the object being detected. Specifically, the pressure detection element 16 can use pressure-sensitive paper to collect pressure readings and read the pressure readings using color grayscale resolution software.

[0063] Please see Figure 12 Secondly, embodiments of this application provide a method for detecting carbon paper intrusion. This method is applied to the aforementioned carbon paper intrusion detection device 10.

[0064] The carbon paper intrusion amount is based on the height of the first membrane electrode carbon paper 21 after it penetrates the first surface 111 of the first electrode plate 11, where the first flow channel 113 is provided, into the first flow channel 113. During detection, the first surface is used as a reference surface, and the distance between the probe 171 and the first surface needs to be calibrated as the reference surface distance.

[0065] Methods for detecting carbon paper intrusion include: S101, Calibration of reference plane distance h10: The first electrode plate 11 and the second electrode plate 12 are stacked, with the first surface 111 facing the smooth surface (and the third surface 121) of the second electrode plate 12 and flat against each other. The second electrode plate 12 is pressed against the first electrode plate 11 to apply a pressure of F1 to the second electrode plate 12, and the distance h10 between itself and the smooth surface of the second electrode plate 12 is measured by the ranging component 17.

[0066] Specifically, the time-domain curve of the distance between the optical surface of the second electrode plate 12 and itself is detected by the ranging component 17, and the average value is taken as the reference distance h10. Specifically, the probe 171 of the ranging component 17 needs to move within the aperture range of the first detection hole and measure the distance, and the average value of the distance measured at multiple positions is taken as h10.

[0067] S102, Detection of distance h11 after carbon paper intrusion: The first electrode plate 11, the first membrane electrode carbon paper 21, the second membrane electrode carbon paper 22 and the second electrode plate 12 are stacked in sequence, with the first surface 111 and the fourth surface 122 facing each other, and the first surface 111 and the first membrane electrode carbon paper 21 are flat, and the fourth surface 122 and the second membrane electrode carbon paper 22 are flat; the second electrode plate 12 is pressed against the first electrode plate 11 to apply a pressure of F1 to the second electrode plate 12, so that the part of the first membrane electrode carbon paper 21 opposite to the first flow channel 113 intrudes into the first flow channel 113 to form the first intrusion part; the distance h11 between itself and the first intrusion part is measured by the ranging component 17.

[0068] Specifically, the ranging component 17 detects the time-domain curve of the distance between the surface of the first intrusion and itself, and takes the average value as the detection distance h11. In particular, the probe 171 of the ranging component 17 needs to move within the aperture range of the first detection hole and measure the distance, and take the average value of the distances measured at multiple positions as h11.

[0069] S103. Calculate the intrusion amount δh1: Based on the distance h11 between the ranging component 17 and the first intrusion part, and the distance h10 between the ranging component 17 and the smooth surface of the second electrode plate 12, the intrusion amount δh1 of the first film electrode carbon paper 21 into the first flow channel 113 is obtained. Specifically, the conversion of the intrusion amount δh1 of the first film electrode carbon paper 21 is: δh1 = h10 - h11.

[0070] S104. Calibration of the surface pressure of the first membrane electrode carbon paper 21: Stack the first electrode plate 11, pressure detection element 16, first membrane electrode carbon paper 21, second membrane electrode carbon paper 22, and second electrode plate 12 in sequence, with the first surface 111 flat against the first membrane electrode carbon paper 21 and the fourth surface 122 flat against the second membrane electrode carbon paper 22; press the second electrode plate 12 against the first electrode plate 11 to apply a pressure of F1 to the second electrode plate 12, and read the pressure through the pressure detection element 16. Figure 5 As shown.

[0071] S105. Repeat the above steps, adjusting the value of F1 to obtain the penetration amount δh1 of the carbon paper 21 of the first membrane electrode under different pressures. For example, the value of F1 can be selected between 0.1MPa and 0.5MPa.

[0072] In measuring the intrusion amount of the membrane electrode cathode carbon paper into the cathode plate channel, the first electrode plate 11 is the cathode plate, the first membrane electrode carbon paper 21 is the membrane electrode cathode carbon paper, and the second electrode plate 12 is the anode plate. In measuring the intrusion amount of the membrane electrode anode carbon paper into the anode plate channel, the first electrode plate 11 is the anode plate, the first membrane electrode carbon paper 21 is the membrane electrode anode carbon paper, and the second electrode plate 12 is the cathode plate.

[0073] Furthermore, the second surface 112 is smooth, and the third surface 121 is provided with a second detection through-hole 124. The end of the second detection through-hole 124 near the fourth surface 122 communicates with the second flow channel 123. When the first electrode plate 11 and the second electrode plate 12 are stacked, the first detection through-hole 114 and the second detection through-hole 124 are misaligned. In the second state, the fourth surface 122 is arranged facing the second surface 112 and the first surface 111 in sequence. The pressure detection element 16 is used to detect the pressure value on the fourth surface 122, and the ranging component 17 is configured to detect the distance between the component attached to the fourth surface 122 and the second surface 122 through the second detection through-hole 124. Under this scheme, the positions of the second electrode plate 12 and the first electrode plate 11 can be directly interchanged and assembled according to the above-mentioned matching method. Then, the intrusion amount of the second membrane electrode carbon paper 22 into the second electrode plate 12 is measured according to the step of measuring the intrusion of the first membrane electrode carbon paper 21 into the first electrode plate 11, so as to obtain the intrusion amount δh2 of the second membrane electrode carbon paper 22 into the second flow channel 123 under different pressures.

[0074] Specifically, one of the first electrode plate 11 and the second electrode plate 12 is a cathode plate and the other is an anode plate. The first membrane electrode carbon paper 21 corresponds to the first electrode plate 11, and the second membrane electrode carbon paper 22 corresponds to the second electrode plate 12.

[0075] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0076] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0077] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0078] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A carbon paper intrusion detection device (10), characterized in that, include: Ranging component (17); The first electrode plate (11) has a first surface (111) and a second surface (112) arranged opposite to each other. A first flow channel (113) is provided on the first surface (111), and a first detection through hole (114) is provided on the second surface (112). The end of the first detection through hole (114) near the first surface (111) is connected to the first flow channel (113). The second electrode plate (12) has a third surface (121) that is smooth and a fourth surface (122) on which a second flow channel (123) is provided. The second electrode plate (12) is stacked with the first electrode plate (11). In the first state, the first surface (111) is configured to face the third surface (121) and the fourth surface (122) in sequence. The ranging component (17) is configured to detect the distance between the second electrode plate (12) attached to the first surface (111) through the third surface (121) under a set pressure and the first membrane electrode carbon paper (21) attached to the first surface (111) under a set pressure.

2. The carbon paper intrusion detection device (10) according to claim 1, characterized in that, The second surface (112) is a smooth surface. A second detection through hole (124) is provided on the third surface (121). The end of the second detection through hole (124) near the fourth surface (122) is connected to the second flow channel (123). When the first electrode plate (11) and the second electrode plate (12) are stacked, the first detection through hole (114) and the second detection through hole (124) are misaligned. In the second state, the fourth surface (122) is configured to face the second surface (112) and the first surface (111) in sequence. The ranging component (17) is configured to detect the distance between the first electrode plate (11) attached to the fourth surface (122) through the second detection through hole (124) under a set pressure and the second membrane electrode carbon paper (22) attached to the fourth surface (122) under a set pressure.

3. The carbon paper intrusion detection device (10) according to claim 2, characterized in that, The second detection through hole (124) is a tapered hole, and the small diameter end of the second detection through hole (124) is located closer to the fourth surface (122) than the large diameter end of the second detection through hole (124); And / or, the first detection through hole (114) is a tapered hole, and the small diameter end of the first detection through hole (114) is set closer to the first surface (111) than the large diameter end of the first detection through hole (114).

4. The carbon paper intrusion detection device (10) according to claim 1, characterized in that, The carbon paper intrusion detection device (10) also includes a guide rail mechanism (13), and the probe (171) of the ranging component (17) is slidably disposed on the guide rail mechanism (13). In the first state, the probe (171) of the ranging component (17) is configured to move to one end of the first detection through hole (114) under the guidance of the guide rail mechanism (13) to measure the distance between the part of the first membrane electrode carbon paper (21) and the second electrode plate (12) facing the first detection through hole (114) and the probe (171) of the ranging component (17); In the second state, the probe (171) of the ranging assembly (17) is configured to move to one end of the second detection through hole (124) under the guidance of the guide rail mechanism (13) to measure the distance between the second membrane electrode carbon paper (22) and the portion of the first electrode plate (11) facing the second detection through hole (124) and the probe (171) of the ranging assembly (17).

5. The carbon paper intrusion detection device (10) according to claim 4, characterized in that, The guide rail mechanism (13) includes a guide rail (131), a slider (132) and a mounting plate (133). The guide rail (131) is located on one side of the first pole plate (11). The slider (132) is slidably disposed on the guide rail (131). One end of the mounting plate (133) is connected to the slider (132). The probe (171) of the ranging component (17) is mounted on the mounting plate (133).

6. The carbon paper intrusion detection device (10) according to any one of claims 1 to 5, characterized in that, The carbon paper intrusion detection device (10) further includes a press device (14), which includes a frame (141), a press head (142), and a linear drive device (143). The frame (141) has a bearing surface (1411), the first electrode plate (11) and the second electrode plate (12) are stacked on the bearing surface (1411), the press head (142) is slidably disposed on the frame (141), and the linear drive device (143) is installed on the frame (141) and connected to the press head (142) to drive the press head (142) away from or closer to the first electrode plate (11) along the stacking direction.

7. The carbon paper intrusion detection device (10) according to claim 6, characterized in that, The carbon paper intrusion detection device (10) also includes a base (15), which is disposed on the bearing surface (1411). In the first state, the first electrode plate (11) is installed on the end of the base (15) away from the bearing surface (1411), and the second electrode plate (12) is located on the side of the first electrode plate (11) away from the base (15). In the second state, the second electrode plate (12) is mounted on the end of the base (15) away from the bearing surface (1411), and the first electrode plate (11) is located on the side of the second electrode plate (12) away from the base (15).

8. The carbon paper intrusion detection device (10) according to claim 7, characterized in that, A mounting groove (151) is provided at one end of the base (15) away from the bearing surface (1411), and the ranging component (17) is disposed in the mounting groove (151); Wherein, at least one end of the mounting slot (151) is an open end; And / or, the width of the groove opening of the mounting groove (151) is less than the width of the bottom surface of the mounting groove (151).

9. The carbon paper intrusion detection device (10) according to any one of claims 1 to 5, characterized in that, It also includes a pressure detection element (16), which is used to detect the pressure value of the first surface (111) in the first state and to detect the pressure value of the fourth surface (122) in the second state.

10. A method for detecting carbon paper intrusion, characterized in that, The carbon paper intrusion detection device (10) as described in any one of claims 1 to 9, wherein the carbon paper intrusion detection method comprises: Calibration of distance h10 between reference surfaces: The first electrode plate (11) and the second electrode plate (12) are stacked, with the first surface (111) and the smooth surface of the second electrode plate (12) flat against each other. The second electrode plate (12) is pressed against the first electrode plate (11) to apply a pressure of F1 to the second electrode plate (12), and the distance h10 between itself and the smooth surface of the second electrode plate (12) is measured by the ranging component (17). Detection of distance h11 after carbon paper intrusion: The first electrode plate (11), the first membrane electrode carbon paper (21), the second membrane electrode carbon paper (22) and the second electrode plate (12) are stacked in sequence, with the first surface (111) flat against the first membrane electrode carbon paper (21) and the fourth surface (122) flat against the second membrane electrode carbon paper (22); the second electrode plate (12) is pressed against the first electrode plate (11) to apply a pressure of F1 to the second electrode plate (12), so that the part of the first membrane electrode carbon paper (21) opposite to the first flow channel (113) intrudes into the first flow channel (113) to form a first intrusion part; the distance h11 between itself and the first intrusion part is measured by the ranging component (17); Calculate the intrusion amount δh1: Based on the distances h11 and h10, the intrusion amount δh1 of the first membrane electrode carbon paper (21) into the first flow channel (113) is obtained.

11. The method for detecting carbon paper intrusion according to claim 10, characterized in that, Also includes: Pressure calibration of the first membrane electrode carbon paper (21): The first electrode plate (11), the pressure detection element (16), the first membrane electrode carbon paper (21), the second membrane electrode carbon paper (22) and the second electrode plate (12) are stacked in sequence, with the first surface (111) flat against the first membrane electrode carbon paper (21) and the fourth surface (122) flat against the second membrane electrode carbon paper (22); the second electrode plate (12) is pressed against the first electrode plate (11) to apply a pressure of magnitude F1 to the second electrode plate (12), and the pressure is read by the pressure detection element (16); And / or, adjust the size of F1 and repeat the measurement operation to obtain the amount of penetration δh1 of the first membrane electrode carbon paper (21) under different pressures.

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