Membrane electrode moisture content monitoring device of fuel cell

Abstract

The utility model relates to a water content monitoring device for a membrane electrode of a fuel cell. The device comprises a PCB substrate, a detection bonding pad and N first resistors, the detection bonding pad comprises N sub bonding pads, the number of the first resistors is N, and the N sub bonding pads are fixed on the PCB substrate; the N sub bonding pads are used for obtaining current signals of different areas in a membrane electrode unit in the fuel cell; for each sub-pad in the N sub-pads, one side, close to the PCB substrate, of the sub-pad is electrically connected with a first end of a first resistor through a through hole reserved in the PCB substrate; the second end of each first resistor is connected with an impedance tester through a line; the impedance tester is used for generating an impedance spectrum according to a voltage signal input by the first resistor, so as to generate moisture content distribution information based on the impedance spectrum. According to the scheme, the water content monitoring efficiency and accuracy of the membrane electrode unit are improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery detection, and particularly to a membrane electrode water content monitoring device for a fuel cell. Background Art

[0002] In the related art, the proton exchange membrane fuel cell (PEMFC) has become an important research object in the new energy field due to its advantages such as high operating efficiency and zero pollution emissions. Since the active area of the proton exchange membrane is large and the reaction mechanism of the fuel cell is complex, the electrochemical reactions in different regions may not be consistent, resulting in different water contents in different regions of the proton exchange membrane. However, the existing fuel cell detection methods require breaking the closed structure of the fuel cell, making it difficult to achieve real-time monitoring of the water content of the internal proton exchange membrane during the operation of the fuel cell, and it is difficult to obtain real-time changing water content monitoring information, resulting in poor detection effects on the battery. Summary of the Invention

[0003] To overcome the problems existing in the related art, the present disclosure provides a membrane electrode water content monitoring device for a fuel cell.

[0004] According to a membrane electrode water content monitoring device for a fuel cell provided by an embodiment of the present disclosure, it includes a PCB substrate, detection pads, and first resistors. The detection pads include N sub-pads, and there are N first resistors, where:

[0005] The N sub-pads are fixed on the PCB substrate; the N sub-pads are used to obtain current signals in different regions of the membrane electrode unit in the fuel cell; N is an integer greater than 1;

[0006] For each of the N sub-pads, one side of the sub-pad close to the PCB substrate is electrically connected to the first end of a first resistor through a through hole reserved on the PCB substrate;

[0007] The second end of each first resistor is connected to an impedance tester through a circuit; the impedance tester is used to generate an impedance spectrum based on the voltage signal input by the first resistor, so as to generate water content distribution information based on the impedance spectrum.

[0008] In some embodiments of the present application, it further includes N signal amplification elements, where:

[0009] A signal amplification element is connected to the circuit between each first resistor and the impedance tester;

[0010] Wherein, the input end of the signal amplification element is connected to the second end of the first resistor, and the output end of the signal amplification element is connected to the impedance tester.

[0011] In some embodiments of the present application, the N sub-pads are all rectangular, and the areas of the N sub-pads are the same. The N sub-pads are arranged on the PCB substrate in an array form; the outer contour of the detection pad corresponds to the shape of the area to be detected of the membrane electrode unit.

[0012] In some embodiments of the present application, the outer contour of the PCB substrate corresponds to the outer contour of the membrane electrode unit in the fuel cell.

[0013] In some embodiments of the present application, bolt mounting holes for fixing with the membrane electrode unit are provided on the PCB substrate.

[0014] In some embodiments of the present application, a plurality of capacitive spaces for mounting the sub-pads, the first resistor, and the signal amplification element are provided on the PCB substrate; one sub-pad, one first resistor, and one signal amplification element are sequentially placed in each capacitive space; the sub-pad, the first resistor, and the signal amplification element in the same capacitive space are sequentially connected through a circuit 9.

[0015] In some embodiments of the present application, a lead-out metal sheet is further installed on one side of each capacitive space away from the sub-pad. A plurality of signal output lines are provided on the PCB substrate. The input end of each signal output line is connected to a lead-out metal sheet, and the output end of each signal output line is connected to the impedance tester.

[0016] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: By providing a plurality of sub-pads corresponding to the membrane electrode of the fuel cell to be tested on the PCB substrate, the current signals at different positions of the membrane electrode unit can be obtained in different regions. After converting the current signal into a voltage signal through the first resistor, the impedance tester is used to convert the voltage signal into an impedance spectrum, so that the moisture content distribution information can be generated based on the impedance spectrum. The moisture content monitoring device of the membrane electrode of the fuel cell has a simple structure and occupies a small space. When testing the moisture content of the fuel cell, the device can be directly placed in the fuel cell, thereby ensuring the sealing of the fuel cell, and then realizing the real-time monitoring of different regions of the membrane electrode unit, effectively improving the efficiency and accuracy of the moisture content monitoring of the membrane electrode unit.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0019] Figure 1Schematic diagram of a membrane electrode water content monitoring device for a fuel cell shown according to an exemplary embodiment.

[0020] Figure 2 Cross-sectional schematic diagram of a membrane electrode water content monitoring device for a fuel cell shown according to an embodiment of the present disclosure.

[0021] Figure 3 Cross-sectional schematic diagram of a fuel cell shown according to an embodiment of the present disclosure.

[0022] Figure 4 Impedance spectrum shown according to an embodiment of the present disclosure.

[0023] Figure 5 Water content distribution map shown according to an embodiment of the present disclosure.

[0024] Figure 6 Flowchart of a method for monitoring the water content of a membrane electrode for a fuel cell shown according to an exemplary embodiment.

[0025] Figure 7 Block diagram of a device for monitoring the water content of a membrane electrode for a fuel cell shown according to an exemplary embodiment.

[0026] Reference Signs

[0027] 1. PCB substrate; 2. First resistor; 3. Bolt mounting hole; 4. Signal output line; 5. Sub-pad; 6. Exported metal sheet; 7. Solute space; 8. Signal amplification element; 9. Circuit; 10. Housing; 11. Membrane electrode unit. Detailed implementation

[0028] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0029] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present disclosure. The singular forms "a" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0030] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "when" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0031] In addition, various forms of processes shown in the embodiments of the present disclosure can be used, steps can be reordered, added or deleted. For example, the steps described in the present application can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in the present application can be achieved, and no limitations are imposed herein.

[0032] In the related art, the proton exchange membrane fuel cell (PEMFC) has become an important research object in the new energy field due to its advantages such as high operating efficiency and zero pollution emissions. Due to the large active area of the proton exchange membrane and the complex reaction mechanism of the fuel cell, the electrochemical reactions in different regions may not be consistent, resulting in different water return amounts in different regions of the proton exchange membrane. Especially in a large-sized fuel cell stack in practice, in-plane local flooding and drying may occur simultaneously, which directly affects the performance and service life of the fuel cell. However, the existing fuel cell detection methods require breaking the closed structure of the fuel cell, making it difficult to achieve real-time monitoring of the water content of the internal proton exchange membrane during the operation of the fuel cell, and it is difficult to obtain real-time changing water content monitoring information, resulting in poor detection effects on the battery. In addition, the invasive measurement method will change the internal reaction environment of the battery, increase the production difficulty, and affect the working performance of the fuel cell.

[0033] To solve the above problems, the present disclosure provides a membrane electrode water content monitoring device for a fuel cell. By providing a plurality of sub-pads corresponding to the membrane electrode of the fuel cell to be measured on a PCB substrate, current signals at different positions of the membrane electrode unit can be obtained in different regions. After converting the current signal into a voltage signal through a first resistor, an impedance tester is used to convert the voltage signal into an impedance spectrum, so that water content distribution information can be generated based on the impedance spectrum. The membrane electrode water content monitoring device for a fuel cell has a simple structure and occupies a small space. When measuring the water content of the fuel cell, the device can be directly placed inside the fuel cell, thus ensuring the sealing of the fuel cell, and then realizing real-time monitoring of different regions of the membrane electrode unit, effectively improving the efficiency and accuracy of water content monitoring of the membrane electrode unit.

[0034] Figure 1It is a schematic structural diagram of a membrane electrode moisture content monitoring device for a fuel cell shown according to an exemplary embodiment. As Figure 1 shown, it should be noted that the membrane electrode moisture content monitoring device of the fuel cell in the embodiment of the present application is applied to the membrane electrode moisture content monitoring method of the fuel cell.

[0035] As Figure 1 、 Figure 2 shown, the device may include a PCB substrate 1, a detection pad, and a first resistor 2. The detection pad includes N sub-pads 5, and there are N first resistors 2.

[0036] Among them: The N sub-pads 5 are fixed on the PCB substrate 1; the N sub-pads 5 are used to obtain current signals in different regions of the membrane electrode unit 11 in the fuel cell as Figure 3 shown; N is an integer greater than 1;

[0037] For each sub-pad 5 among the N sub-pads 5, the side of the sub-pad 5 close to the PCB substrate 1 is electrically connected to the first end of a first resistor 2 through a through hole reserved on the PCB substrate 1;

[0038] The second end of each first resistor 2 is connected to an impedance tester through a circuit; the impedance tester is used to generate an impedance spectrum according to the voltage signal input by the first resistor 2, so as to generate moisture content distribution information based on the impedance spectrum.

[0039] In one embodiment, in order to be able to detect the moisture content of different regions of the membrane electrode unit 11, a plurality of sub-pads 5 need to be provided on the PCB substrate 1. The detection pads formed by the plurality of sub-pads 5 can cover all the regions to be detected of the membrane electrode unit 11, so as to ensure the integrity of the collected data.

[0040] As an example, the device can be installed at a corresponding position of one of the membrane electrode units 11 in the fuel cell. The detection pad is attached to the region to be detected of the membrane electrode unit 11. The device is connected to an impedance detector outside the fuel cell through a circuit. When the fuel cell is in an operating state, each first resistor 2 collects the current signal at the corresponding position of the membrane electrode, transmits the current signal to the first resistor 2. After the first resistor 2 converts the current signal into a voltage signal, it transmits the voltage signal to the impedance tester, and the impedance tester generates an impedance spectrum according to the voltage signal, so as to generate moisture content distribution information according to the impedance spectrum. Among them, the impedance spectrum is as Figure 4 shown.

[0041] In some embodiments of the present application, the device further includes N signal amplification elements 8, among which:

[0042] A signal amplification element 8 is connected to the circuit between each first resistor 2 and the impedance tester;

[0043] Among them, the input end of the signal amplification element 8 is connected to the second end of the first resistor 2, and the output end of the signal amplification element 8 is connected to the impedance tester.

[0044] It can be understood that using the signal amplification unit to amplify the voltage signal immediately avoids the loss and interference of the signal during the transmission process and improves the accuracy of the monitoring result.

[0045] In one example, the insulating layer material of the line between the first resistor 2 and the impedance tester except for the joint can be polytetrafluoroethylene.

[0046] In some embodiments of the present application, the N sub-pads 5 are all rectangular, and the areas of the N sub-pads 5 are all the same. The N sub-pads 5 are arranged in an array on the PCB substrate 1; the outer contour of the detection pad corresponds to the shape of the area to be detected of the membrane electrode unit 11.

[0047] It can be understood that the smaller the distance between the multiple sub-pads 5, the more accurate the collected signal. Therefore, the Yu Xing sub-pads 5 can be used to collect the current signal, thereby reducing the distance between the sub-pads 5. In addition, all the sub-pads 5 adopt the same size design, which can ensure the theoretical consistency of the total resistance of all measurement circuits.

[0048] In one example, the detection pads of 16 partitions (sub-pads 5 in a 4*4 array) can be designed to realize the function of collecting current signals in a divided area.

[0049] In some embodiments of the present application, the outer contour of the PCB substrate 1 corresponds to the outer contour of the membrane electrode unit 11 in the fuel cell.

[0050] It should be noted that the membrane electrode moisture content monitoring device of the fuel cell proposed in the embodiments of the present application can be applied to data monitoring during the on-line testing of the fuel cell stack and the vehicle-mounted system. Therefore, designing the outer contour of the PCB substrate 1 to be the same as the shape of the membrane electrode of the fuel cell can directly insert the membrane electrode moisture content monitoring device of the fuel cell into the fuel cell stack and serve as one of the membrane electrode units 11 of the fuel cell. Furthermore, there is no need to install a specific separator or seal, which improves the convenience of monitoring the moisture content of the membrane electrode.

[0051] In addition, since the fuel cell stack includes a plurality of adjacent membrane electrode units 11, designing the outer contour of the PCB substrate 1 to be the same as the shape of the membrane electrode of the fuel cell can also avoid the existence of gaps between adjacent membrane electrode units 11 due to the installation of the membrane electrode moisture content monitoring device of the fuel cell, thereby avoiding affecting the normal operation of the fuel cell.

[0052] In some embodiments of the present application, bolt mounting holes 3 for fixing to the membrane electrode unit 11 are provided on the PCB substrate 1.

[0053] It can be understood that bolts can be used to fix the membrane electrode moisture content monitoring device of the fuel cell to the membrane electrode unit 11 to be measured, thereby avoiding the situation of position misalignment between the membrane electrode unit 11 and the device during the detection process, resulting in inaccurate detection results.

[0054] In some embodiments of the present application, a plurality of capacitive spaces 7 for mounting sub-pads 5, first resistors 2, and signal amplification elements 8 are provided on the PCB substrate 1; each capacitive space 7 sequentially houses a sub-pad 5, a first resistor 2, and a signal amplification element 8; the sub-pad 5, the first resistor 2, and the signal amplification element 8 within the same capacitive space 7 are sequentially connected by lines.

[0055] It can be understood that encapsulating the sub-pad 5, the first resistor 2, and the signal amplification element 8 inside the PCB substrate 1 can minimize the overall thickness of the device as much as possible, thereby avoiding gaps between the device and the adjacent membrane electrode unit 11, and further ensuring the normal operation of the fuel cell during the detection process.

[0056] In addition, encapsulating the sub-pad 5, the first resistor 2, and the signal amplification element 8 inside the PCB substrate 1 can also shorten the signal transmission distance in the circuit, reduce the transmission loss, and improve the efficiency and accuracy of signal transmission.

[0057] In some embodiments of the present application, a lead-out metal sheet 6 is further installed on one side of each capacitive space 7 away from the sub-pad 5; a plurality of signal output lines 4 are provided on the PCB substrate 1, the input end of each signal output line 4 is connected to a lead-out metal sheet 6, and the output end of each signal output line 4 is connected to an impedance tester.

[0058] In one example, as Figure 2 shown, the capacitive space 7 may be provided with a plurality of sub-spaces, the sub-pad 5, the first resistor 2, the signal amplification element 8, and the lead-out metal sheet 6 are respectively arranged in different sub-spaces, and the sub-pad 5, the first resistor 2, the signal amplification element 8, and the lead-out metal sheet 6 are connected by lines, and the lines are arranged in the through holes reserved between adjacent sub-spaces.

[0059] In one embodiment, the method of connecting the lead-out metal sheet 6 to the output line provided on the PCB substrate 1 is used to output the voltage signal. This method is used to replace the direct connection with wires, further avoiding gaps between the PCB substrate 1 and the adjacent membrane electrode unit 11, and further ensuring the normal operation of the fuel cell during the detection process.

[0060] As an example, a surface mount technology can be adopted to improve the integration of the sensor and shorten the current path. The design and via method of each capacitive space 7 are kept consistent.

[0061] In some embodiments of the present application, a four-wire connection method can be adopted to improve the measurement accuracy of the signal.

[0062] The membrane electrode moisture content monitoring device of the fuel cell proposed according to the embodiments of the present application can obtain current signals at different positions of the membrane electrode unit in different regions by arranging a plurality of sub-pads corresponding to the membrane electrode of the fuel cell to be measured on the PCB substrate. After converting the current signal into a voltage signal through the first resistor, an impedance tester is used to convert the voltage signal into an impedance spectrum, so that moisture content distribution information can be generated based on the impedance spectrum. The membrane electrode moisture content monitoring device of the fuel cell has a simple structure and occupies a small space. When testing the moisture content of the fuel cell, the device can be directly placed inside the fuel cell, thus ensuring the sealing of the fuel cell, and then realizing the real-time monitoring of different regions of the membrane electrode unit, effectively improving the efficiency and accuracy of the moisture content monitoring of the membrane electrode unit. In addition, during the PCB design process of the membrane electrode moisture content monitoring device of the fuel cell, the buried resistor process is avoided, the cost is controlled, and the maintainability is considered, increasing the feasibility of practical engineering applications.

[0063] Figure 6 It is a flowchart of a method for monitoring the moisture content of the membrane electrode of a fuel cell shown according to an exemplary embodiment. Refer to Figure 6 This method is applied to the membrane electrode moisture content monitoring device of the fuel cell proposed in some embodiments of the present application. The method may include the following steps:

[0064] Step 601, control the fuel cell to be measured to be in an operating state;

[0065] Step 602, control the impedance detector to receive the voltage signals respectively output by the N first resistors 2 of the membrane electrode moisture content monitoring device of the fuel cell; wherein, the membrane electrode moisture content monitoring device of the fuel cell is arranged inside the housing 10 of the fuel cell, and each first resistor 2 is connected to the impedance tester through a line penetrating the housing 10; the voltage signal is obtained after the first resistor 2 converts the current signal collected by the sub-pad 5; the impedance detector receives the N voltage signals through different signal transmission interfaces;

[0066] Step 603, control the impedance detector to convert the N collected voltage signals into impedance spectra respectively;

[0067] Step 604, obtain the identification information of the signal transmission interfaces corresponding to the N voltage signals;

[0068] Step 605: Determine the regional position information corresponding to each impedance spectrum according to the preset mapping relationship between the identification information and the relative position coordinates, so as to determine the water content of different regions in the membrane electrode unit 11 based on the impedance spectrum and the corresponding regional position information.

[0069] In one embodiment, in order to be able to distinguish which region of the membrane electrode unit 11 to be measured the different voltage signals correspond to, the collected voltage signals can be transmitted using different signal transmission interfaces, so as to distinguish the voltage signals according to the identification of different signal transmission interfaces. The mapping relationship between different identifications and different regional positions of the membrane electrode unit 11 to be measured can be preset. Since the shape of the detection area of the membrane electrode unit 11 to be measured corresponds to the overall shape of the detection pad, the above mapping relationship is also the mapping relationship between the identification and different sub-pads 5. Therefore, after converting the N collected voltage signals into impedance spectra respectively, the regional position information corresponding to each impedance spectrum can be determined according to the above mapping relationship, so as to determine the water content of different regions in the membrane electrode unit 11 based on the impedance spectrum and the corresponding regional position information, thereby realizing obtaining the water content rate of different positions of the membrane electrode by region and improving the accuracy of detecting the water content rate of the membrane electrode unit 11.

[0070] In some embodiments of the present application, after determining the regional position information corresponding to each impedance spectrum according to the mapping relationship between the identification information and the relative position coordinates, the operation strategy of the fuel cell can also be optimized according to the water content rate of different positions of the membrane electrode, thereby improving the performance of the fuel cell.

[0071] In some embodiments of the present application, after determining the regional position information corresponding to each impedance spectrum according to the mapping relationship between the identification information and the relative position coordinates, the method may further include:

[0072] Perform fast Fourier transform processing on each impedance spectrum to obtain a water content distribution map corresponding to each impedance spectrum;

[0073] Perform stitching processing on the water content distribution map according to the regional position information corresponding to each impedance spectrum to obtain the water content distribution map of the membrane electrode unit 11.

[0074] In one embodiment, the impedance spectrum is converted into a water content distribution map by fast Fourier transform, and the water content distribution map is stitched according to the regional position information corresponding to each impedance spectrum to obtain the water content distribution map of the membrane electrode unit 11 as shown in Figure 5 Thereby realizing the visualization of the water content rate.

[0075] Regarding the device in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated herein.

[0076] In some embodiments of the present application, the sampling method that can be adopted is to respectively define a sampling start point and a sampling duration for each sub-pad 5.

[0077] As a possible example, during the test, bipolar plates and membrane electrodes can be neatly stacked on a stacker. During this period, the membrane electrode moisture content monitoring device of the fuel cell is placed at the middle position of the stack, the end plates of the fuel cell are installed, and the whole stack is pressed and the airtightness of the whole stack is detected; the test stack is installed on the fuel cell test bench test system, hydrogen is supplied to the anode and air is supplied to the cathode at different relative humidities and temperatures, and the air flow is humidified through an external humidifier. High-precision temperature and humidity transmitters and pressure sensors are installed on the inlet and outlet pipes of the anode and cathode. The performance of the fuel cell stack is evaluated at a working temperature of 80 °C, a pressure of 1 atm, an air relative humidity of 10% - 100%, and a hydrogen relative humidity of 0% - 100%. The gas pipeline temperature between the humidifier and the battery and between the battery and the dew point meter is maintained at 90 °C. Each signal output line 4 on the membrane electrode moisture content monitoring device of the fuel cell is connected to a multi-channel acquisition impedance analysis system (which can be an impedance tester), and the connection line needs to ensure good contact and prevent interference. Turn on the test instrument and conduct the test. During the test, the sampling frequency is set to 5000 Hz and the sampling time is set to 2 min. At the same time, the detection results are dynamically displayed in the visualization window.

[0078] According to the method for monitoring the moisture content of the membrane electrode of a fuel cell proposed in the embodiments of the present application, by setting a plurality of sub-pads corresponding to the membrane electrode of the fuel cell to be measured on the PCB substrate, current signals at different positions of the membrane electrode unit can be obtained in different regions. After converting the current signal into a voltage signal through a first resistor, an impedance tester is used to convert the voltage signal into an impedance spectrum, so that the moisture content distribution information can be generated based on the impedance spectrum. The structure of the membrane electrode moisture content monitoring device of the fuel cell is simple and occupies little space. When testing the moisture content of the fuel cell, the device can be directly placed inside the fuel cell, thereby ensuring the sealing of the fuel cell, and then realizing the real-time monitoring of different regions of the membrane electrode unit, effectively improving the efficiency and accuracy of the moisture content monitoring of the membrane electrode unit. It makes it possible to determine the water content in the plane of the membrane electrode during the operation of the fuel cell PEMFC, including during constant current output and transient current variable load.

[0079] Figure 7 It is a block diagram of a device for monitoring the moisture content of a membrane electrode for a fuel cell shown according to an exemplary embodiment. For example, the device 700 can be an electronic device, such as a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0080] Reference Figure 7 As shown in Figure 7 , device 700 may include one or more of the following components: processing component 702, memory 704, power component 706, multimedia component 708, audio component 710, input / output (I / O) interface 712, sensor component 714, and communication component 716.

[0081] Processing component 702 generally controls the overall operation of device 700, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. Processing component 702 may include one or more processors 720 to execute instructions to complete all or part of the steps of the above-described methods. In addition, processing component 702 may include one or more modules to facilitate interaction between processing component 702 and other components. For example, processing component 702 may include a multimedia module to facilitate interaction between multimedia component 708 and processing component 702.

[0082] Memory 704 is configured to store various types of data to support the operation of device 700. Examples of such data include instructions for any application or method operating on device 700, contact data, phone book data, messages, pictures, videos, and the like. Memory 704 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a disk, or an optical disc.

[0083] Power component 706 provides power to the various components of device 700. Power component 706 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for device 700.

[0084] The multimedia component 708 includes a screen that provides an output interface between the device 700 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 708 includes a front camera and / or a rear camera. When the device 700 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0085] The audio component 710 is configured to output and / or input audio signals. For example, the audio component 710 includes a microphone (MIC) that is configured to receive external audio signals when the device 700 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 704 or transmitted via the communication component 716. In some embodiments, the audio component 710 further includes a speaker for outputting audio signals.

[0086] The I / O interface 712 provides an interface between the processing component 702 and a peripheral interface module, which can be a keyboard, a click wheel, buttons, etc. These buttons can include but are not limited to: a home button, a volume button, a power button, and a lock button.

[0087] The sensor component 714 includes one or more sensors for providing status assessments of various aspects of the device 700. For example, the sensor component 714 can detect the on / off state of the device 700, the relative positioning of components, such as the display and the keypad of the device 700. The sensor component 714 can also detect a change in the position of the device 700 or a component of the device 700, the presence or absence of user contact with the device 700, the orientation or acceleration / deceleration of the device 700, and the temperature change of the device 700. The sensor component 714 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 714 can also include a light sensor, such as a CMOS or a CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 714 can further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0088] The communication component 716 is configured to facilitate communication, either wired or wirelessly, between the device 700 and other devices. The device 700 may access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 716 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 716 further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra-Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0089] In an exemplary embodiment, the device 700 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-described method.

[0090] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions, such as the memory 704 including instructions, is also provided. The above instructions may be executed by the processor 720 of the device 700 to complete the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, magnetic tape, floppy disk, and optical data storage device, among others.

[0091] In an exemplary embodiment, a computer program product including a computer program is also provided. The computer program, when executed by the processor 720 of the device 700, implements the above-described method.

[0092] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for facilitating the description of the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present disclosure.

[0093] In addition, 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0094] In the present disclosure, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure may be understood according to specific circumstances.

[0095] In the present disclosure, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0096] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0097] It should be understood that the present invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A membrane electrode moisture content monitoring device for a fuel cell, characterized in that It includes a PCB substrate, detection pads, and a first resistor. The detection pads include N sub-pads, and there are N first resistors, where: The N sub-pads are fixed on the PCB substrate; the N sub-pads are used to obtain current signals from different regions in the membrane electrode unit of the fuel cell; N is an integer greater than 1; For each of the N sub-pads, one side of the sub-pad close to the PCB substrate is electrically connected to the first end of a first resistor through a through hole reserved on the PCB substrate; The second end of each first resistor is connected to an impedance tester through a circuit; the impedance tester is used to generate an impedance spectrum based on the voltage signal input by the first resistor, so as to generate moisture content distribution information based on the impedance spectrum.

2. The membrane electrode moisture content monitoring device for a fuel cell according to claim 1, characterized in that, It further includes N signal amplification components, where: A signal amplification component is connected to the circuit between each first resistor and the impedance tester; Among them, the input end of the signal amplification component is connected to the second end of the first resistor, and the output end of the signal amplification component is connected to the impedance tester.

3. The membrane electrode moisture content monitoring device of the fuel cell according to claim 1, characterized in that, The N sub-pads are all rectangular, and the areas of the N sub-pads are the same. The N sub-pads are arranged in an array on the PCB substrate; the outer contour of the detection pad corresponds to the shape of the area to be detected of the membrane electrode unit.

4. The membrane electrode moisture content monitoring device for a fuel cell according to claim 1, characterized in that, The outer contour of the PCB substrate corresponds to the outer contour of the membrane electrode unit in the fuel cell.

5. The membrane electrode moisture content monitoring device for a fuel cell according to claim 1, characterized in that, Bolt mounting holes for fixing to the membrane electrode unit are provided on the PCB substrate.

6. The moisture content monitoring device for the membrane electrode of a fuel cell according to claim 2, characterized in that, Multiple capacitive spaces for mounting the sub-pads, first resistors, and signal amplification components are provided on the PCB substrate; each capacitive space sequentially houses a sub-pad, a first resistor, and a signal amplification component; the sub-pad, first resistor, and signal amplification component in the same capacitive space are sequentially connected through a circuit.

7. The membrane electrode moisture content monitoring device of the fuel cell according to claim 6, characterized in that, A lead-out metal sheet is further installed on one side of each capacitive space away from the sub-pad. Multiple signal output lines are provided on the PCB substrate. The input end of each signal output line is connected to a lead-out metal sheet, and the output end of each signal output line is connected to the impedance tester.

Images