Fuel cell internal performance test device and method, partition test module and equipment

Abstract

The invention discloses a fuel cell internal performance test device and method, and a partition test module and equipment, the test device comprises: a partition test module which is symmetrically arranged at two sides of a membrane electrode with an anode plate, the partition test module comprises a plurality of test units, each test unit corresponds to an electrical test area in a galvanic pile, and the test area is used for testing the internal performance of the galvanic pile; the test unit is used for collecting partition test data of the corresponding electric test area; and the data processing module is connected with the test units and is used for receiving the partition test data acquired by all the test units and determining feature data of each electrical test area according to the partition test data. According to the invention, the zoning test module is arranged to collect the zoning test data of the plurality of electric test areas in the fuel cell, and the distribution condition of the characteristic data of each electric test area in the stack is calculated according to the zoning test data, so that the running performance of the stack is not influenced, and the real working condition in the fuel cell can be accurately reflected; the operability and the practicability are high.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell testing, and in particular to a fuel cell internal performance testing device, method, partition testing module and equipment. Background Art

[0002] Hydrogen energy has many advantages such as cleanliness and high efficiency, and has attracted more and more attention. Among them, hydrogen fuel cells have become the focus of research in the new energy field because of their cleanliness, environmental protection, silent operation, and high energy conversion efficiency.

[0003] Hydrogen fuel cells mainly include bipolar plates (including anode plates and cathode plates), membrane electrodes, and catalysts for accelerating battery reactions. Among them, as one of the core components of fuel cells, the bipolar plate has a uniformity of flow channel that determines the efficiency of the membrane electrode. It needs to cooperate with the membrane electrode to improve the maximum efficiency of the stack, and has a significant impact on the temperature field, humidity field, and pressure field inside the entire stack. The temperature, humidity, and pressure inside the fuel cell will affect the activity of the catalyst and the mass transfer efficiency of the bipolar plate. Therefore, monitoring the temperature, humidity, and pressure inside the stack is of great significance to ensure the safe, stable, and efficient operation of the fuel cell.

[0004] In the prior art, hydrogen fuel cells mainly infer the flow fields such as temperature and humidity inside the battery by measuring outside the battery, and the measured values ​​are not accurate. Some embedded measurement methods require processing a large number of hole and slot structures on the bipolar plate, which has a significant negative impact on the performance of the fuel cell, often causing gas leakage, assembly difficulties, and sensor leads that cannot be led out. It is difficult to apply to fuel cell stacks under actual working conditions and cannot effectively reflect the actual working conditions inside the fuel cell. For large-area fuel cells, unreasonable bipolar plate flow channel design will lead to performance degradation in local areas first during long-term operation, thereby limiting the improvement of the stack life. Summary of the invention

[0005] The present invention provides a fuel cell internal performance testing device, method and partition test module to solve the problem that existing fuel cell stack performance testing means cannot effectively measure the actual working conditions inside the fuel cell stack or affect the normal operating performance of the fuel cell stack, and has strong operability and practicality.

[0006] According to one aspect of the present invention, there is provided a fuel cell internal performance testing device, wherein the fuel cell comprises: an anode plate and a membrane electrode, and the testing device comprises: a partitioned testing module, symmetrically arranged on both sides of the membrane electrode with respect to the anode plate, the partitioned testing module comprising a plurality of testing units, each of the testing units corresponding to an electrical testing area inside the fuel cell stack, the testing unit being used for collecting partitioned testing data of the corresponding electrical testing area; a data processing module, connected to the testing unit, for receiving the partitioned testing data collected by all the testing units, and determining characteristic data of each of the electrical testing areas according to the partitioned testing data.

[0007] Optionally, the test unit includes: an electrical parameter collection layer and a circuit layer; the electrical parameter collection layer can cover the electrical test area and is used to guide the carriers in the electrical test area to the circuit layer; the circuit layer is used to calculate the partition test data based on the carriers and transmit the partition test data to the data processing module.

[0008] Optionally, the partition test data includes at least one of the following: partition current, partition temperature and partition impedance; the characteristic data includes at least one of the following: battery stack pressure and battery stack humidity.

[0009] Optionally, the circuit layer includes: a first resistor, a second resistor, a first conductive area, a second conductive area and an insulating area; wherein the first conductive area and the second conductive area are used to connect an impedance test excitation source; the insulating area is used to insulate and separate the first conductive area and the second conductive area; the first resistor is connected across the first conductive area and the second conductive area, and the first resistor is used to calculate the partition current based on the carrier; the second resistor is set in the first conductive area, and the second resistor is used to collect the partition temperature.

[0010] Optionally, the electrical parameter collection layer is provided with a flow channel structure, and the surface of the flow channel structure is coated with a conductive plating layer.

[0011] Optionally, the fuel cell internal performance testing device also includes: a membrane electrode testing module, used to obtain membrane electrode test data of the membrane electrode under at least one test condition; wherein the membrane electrode test data includes at least one of the following: membrane electrode current, reaction temperature and test impedance.

[0012] Optionally, the test condition is established based on the stack pressure, stack humidity and intake temperature of the fuel cell.

[0013] Optionally, the data processing module is configured to: compare the partition test data with the membrane electrode test data, and when the partition test data and the membrane electrode test data are consistent, determine the characteristic data according to the test conditions corresponding to the membrane electrode test data.

[0014] Optionally, the fuel cell internal performance testing device also includes: a performance analysis module, connected to the data processing module, for determining the characteristic data imbalance based on the characteristic data of each electrical test area, and issuing a corresponding improvement strategy when the characteristic data imbalance is greater than a preset balance threshold.

[0015] Optionally, the improvement strategy includes at least one of the following: adjusting the bipolar plate channel structure based on the characteristic data, adjusting the structure of the membrane electrode based on the improved channel structure, and adjusting the test condition data based on the characteristic data.

[0016] Optionally, two adjacent electrical testing areas are insulated from each other.

[0017] In the second aspect, an embodiment of the present invention provides a partition test module for the above-mentioned fuel cell internal performance test device; the partition test module includes a plurality of test units, each of the test units corresponds to an electrical test area inside the fuel cell stack, and the test unit is used to collect partition test data of the corresponding electrical test area; the test unit includes: an electrical parameter collection layer and a circuit layer; the electrical parameter collection layer can cover the electrical test area, and is used to guide the carriers in the electrical test area to the circuit layer; the circuit layer is used to calculate the partition test data based on the carriers, and transmit the partition test data to the data processing module.

[0018] In a third aspect, an embodiment of the present invention provides a method for testing the internal performance of a fuel cell, wherein the fuel cell comprises: an anode plate and a membrane electrode, and the testing method comprises: collecting partitioned test data of multiple electrical test areas inside the fuel cell stack based on a partitioned test module; wherein the partitioned test module and the anode plate are symmetrically arranged on both sides of the membrane electrode, and the partitioned test module comprises multiple test units, and the test units correspond one-to-one to the electrical test areas; and determining characteristic data of each of the electrical test areas according to the partitioned test data.

[0019] In a fourth aspect, an embodiment of the present invention provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the above-mentioned fuel cell internal performance test method.

[0020] The technical solution of the embodiment of the present invention is to set up a partition test module and a data processing module. The partition test module includes multiple test units, each test unit corresponds to an electrical test area inside the fuel cell stack, and the test unit is used to collect partition test data of the corresponding electrical test area; the data processing module receives the partition test data collected by all the test units, and determines the characteristic data of each electrical test area based on the partition test data, so as to obtain the distribution of the characteristic data inside the fuel cell stack, which solves the problem that the existing fuel cell stack performance testing method cannot effectively measure the real working conditions inside the fuel cell stack, or affects the normal operating performance of the fuel cell stack. By setting up the partition test module, the partition test data of multiple electrical test areas inside the fuel cell are collected, and the distribution of the characteristic data of each electrical test area inside the fuel cell stack is inferred based on the partition test data, which neither affects the operating performance of the fuel cell stack nor can accurately reflect the real working conditions inside the fuel cell, and has strong operability and practicality.

[0021] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of a fuel cell internal performance testing device provided in Embodiment 1 of the present invention;

[0024] Figure 2 An assembly diagram of a fuel cell internal performance testing device provided in Embodiment 1 of the present invention;

[0025] Figure 3 A schematic diagram of the structure of a partition test module provided in the first embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the structure of a test unit provided in Embodiment 1 of the present invention;

[0027] Figure 5 A schematic diagram of the structure of another fuel cell internal performance testing device provided in the first embodiment of the present invention;

[0028] Figure 6A schematic diagram of the structure of another fuel cell internal performance testing device provided in the first embodiment of the present invention;

[0029] Figure 7 A flowchart of a fuel cell internal performance testing method provided in Embodiment 3 of the present invention;

[0030] Figure 8 A flowchart of another fuel cell internal performance testing method provided in Embodiment 3 of the present invention;

[0031] Fig. 9 It is a schematic diagram of the structure of an electronic device for implementing the fuel cell internal performance testing method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] Embodiment 1

[0035] Figure 1 A schematic diagram of the structure of a fuel cell internal performance testing device provided in Embodiment 1 of the present invention. Figure 2 This is an assembly diagram of a fuel cell internal performance testing device provided in Example 1 of the present invention. This embodiment can be used in application scenarios where the temperature, humidity, pressure and other flow fields inside the fuel cell stack are monitored during the design and development stage of the fuel cell, and the fuel cell is designed and improved based on the monitoring results.

[0036] See also Figure 2As shown, the fuel cell includes: an anode plate 1, a membrane electrode 2, an insulating plate 3 and an end plate 4 arranged in parallel. In the complete battery structure, a cathode plate is arranged between the membrane electrode 2 and the insulating plate 3, wherein the membrane electrode 2 is the core part of the battery, including a proton exchange membrane, a catalyst layer and a gas diffusion layer; the anode plate is used to collect electrons and transfer electrons to the cathode plate; the anode plate 1 and the cathode plate are provided with flow channels, which are used to provide channels for fuel (such as hydrogen) and oxidants (such as oxygen or control). The path arrangement of the flow channel is formed into a flow field. The end plate 4 is arranged at both ends of the fuel cell, and the stack is pressed by fasteners. The insulating plate is arranged between the electrode plate and the end plate to prevent the end plate from being charged. One or more single cells are arranged in a single stack.

[0037] See also Figure 1 and Figure 2 As shown, the fuel cell internal performance testing device of the present application includes: a partition testing module 100 and a data processing module 200 .

[0038] Among them, the partition test module 100 can be integrated on a printed circuit board, which is arranged at the position where the original cathode plate is located inside the fuel cell, and is symmetrically arranged on both sides of the membrane electrode with the anode plate. The partition test module 100 includes a plurality of test units (for example, 64), each test unit corresponds to an electrical test area inside the battery stack, and the test unit is used to collect partition test data of the corresponding electrical test area. In this embodiment, the plane where the electrical test area of ​​the partition test module 100 is located is parallel to the plane where the anode plate is located. Optionally, the two adjacent electrical test areas are insulated from each other, and the shape and structure of any two electrical test areas are the same. Optionally, the partition test data includes at least one of the following: partition current, partition temperature and partition impedance. Among them, the partition current represents the total current flowing through a single electrical test area; the partition temperature represents the average temperature of a single electrical test area; and the partition impedance represents the total impedance of a single electrical test area. In this embodiment, the partition test module 100 is used to collect and summarize the partition test data of all electrical test areas (for example, 64 electrical test areas arranged in an array) inside the battery stack.

[0039] The data processing module 200 is connected to the test unit, and is used to receive the partition test data collected by all the test units, and determine the characteristic data of each electrical test area according to the partition test data. Optionally, the characteristic data includes at least one of the following: stack pressure and stack humidity. Among them, the stack pressure represents the working pressure in the stack. The redox reaction in the stack, the content and flow of hydrogen and oxygen, and the temperature in the stack will affect the stack pressure. The stack humidity represents the moisture content in the stack. Changes in the stack humidity are usually accompanied by changes in impedance. The proton exchange membrane inside the membrane electrode is prone to a significant decrease in its proton conductivity due to water evaporation, thereby increasing the internal resistance of the battery.

[0040] Specifically, the data processing module 200 can pre-store a feature analysis database, which is calibrated and established based on the correspondence between a large number of stack currents, stack temperatures, and stack impedances and feature data (such as stack pressure and stack humidity). During the test, after receiving the partition test data collected by all test units, the partition currents, partition temperatures, and partition impedances of each electrical test area actually measured are substituted into the database, and the stack pressure and stack humidity in a set of data that are consistent with the partition current, partition temperature, and partition impedance in the electrical test area are determined as the feature data of the electrical test area. The uniformity of the flow channel in the stack is analyzed by the distribution of the feature data of multiple electrical test areas. Thus, by setting a partition test module, the partition test data of multiple electrical test areas inside the fuel cell are collected, and the distribution of the feature data of each electrical test area inside the stack is inferred according to the partition test data, which does not affect the operation performance of the stack, but can accurately reflect the real working conditions inside the fuel cell, and has strong operability and practicality.

[0041] Figure 3 A schematic diagram of the structure of a partition test module provided in the first embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of a test unit provided in Embodiment 1 of the present invention. Figure 3 As shown, the partition test module 100 of the present application is provided with 64 test units arranged in an array, which represents a single test unit. Figure 3 As shown, the printed circuit board where the partition test module 100 of the present application is located is also provided with an opening structure that cooperates with the anode plate 1 and the membrane electrode 2, such as an air inlet 122, a cooling water inlet 123, a hydrogen outlet 124, a hydrogen inlet 125, a cooling water outlet 126 and an air outlet 127.

[0042] See also Figure 3 and Figure 4 As shown, any test unit includes: an electrical parameter collection layer 110 and a circuit layer 120. The electrical parameter collection layer 110 and the circuit layer 120 may adopt a double-layer structure, wherein the electrical parameter collection layer 110 is arranged on a side close to the membrane electrode, and the circuit layer 120 is arranged on a side of the electrical parameter collection layer 110 away from the membrane electrode. Figure 4 As shown, the electrical parameter collection layer 110 is provided with a flow channel structure, such as a stripe-shaped or grid-shaped flow channel structure; the surface of the flow channel structure is coated with a conductive plating layer, such as a gold or copper plating layer, which can increase the electrical transmission performance of the flow channel structure. Among them, the electrical parameter collection layer 110 can cover the corresponding electrical test area, and is used to guide all carriers in the corresponding electrical test area to the circuit layer 120; the circuit layer 120 is used to calculate the partition test data according to the carriers, and transmit the partition test data to the data processing module 200. In this embodiment, the circuit layer 120 is also used for other signal collection and providing a data transmission path. See Figure 3As shown, the circuit layer 120 is further provided with a data interface 121 .

[0043] Specifically, a partition test module is provided with 64 test units arranged in an array, and the partition test data includes partition current, partition temperature and partition impedance. For example, 64 electrical test areas are provided, and two adjacent electrical test areas are insulated from each other. The shape structure of the electrical parameter collection layer 110 is adjusted according to each electrical test area to collect the current, voltage, temperature, etc. in the corresponding electrical test area, and the partition test data such as partition current, partition temperature and partition impedance of different electrical test areas inside the stack are calculated based on the data collected by the circuit layer. The collected data corresponding to the partition current, partition temperature and partition impedance of each electrical test area is transmitted to the data interface 121 of the circuit layer 120 through the data transmission path of the circuit layer 120, and the data interface 121 is connected to the data processing module 200. The partition test module is composed of the electrical parameter collection layer 110 and the circuit layer 120, which has a simple structure, avoids adjusting the bipolar plate structure or setting a large number of sensors, does not affect the operation performance of the stack, and can accurately reflect the real working conditions inside the fuel cell, and has strong practicality.

[0044] See also Figure 4 As shown, the circuit layer 120 includes: a first resistor R1, a second resistor R2, a first conductive area A, a second conductive area B and an insulating area S; wherein the first conductive area A and the second conductive area B are used to connect the impedance test excitation source; the insulating area S is used to insulate and separate the first conductive area A and the second conductive area B; the first resistor R1 is connected across the first conductive area A and the second conductive area B, and the first resistor R1 is used to calculate the partition current according to the carrier; the second resistor R2 is set in the first conductive area A, and the second resistor R2 is used to collect the partition temperature.

[0045] Specifically, in the test unit corresponding to each electrical test area, the first resistor R1 and the second resistor R2 are embedded on the printed circuit board, and the current in the electrical test area all passes through the first resistor R1, and the partition current in the electrical test area is calculated according to the voltage change at both ends of the first resistor R1. In this embodiment, the second resistor R2 is a thermistor. The partition temperature in the electrical test area is collected through the corresponding relationship between resistance and temperature. After the first conductive area A and the second conductive area B are connected to the impedance test excitation source (for example, an EIS excitation source), the impedance test excitation source calculates the partition impedance of the electrical test area by analyzing the frequency response characteristics in the electrical test area. As a result, the test unit corresponding to each electrical test area can independently collect partition test data, and the partition test data corresponding to different electrical test areas do not interfere with each other, the measurement circuit is simple, the test accuracy is high, and the circuit cost is low.

[0046] Figure 5 This is a schematic diagram of another fuel cell internal performance testing device provided in Example 1 of the present invention. Figure 5 As shown, the fuel cell internal performance test device of the present application also includes: a membrane electrode test module 300, which is used to obtain membrane electrode test data of the membrane electrode under at least one test condition; wherein the membrane electrode test data includes at least one of the following: membrane electrode current, reaction temperature and test impedance. Optionally, the test condition is established based on the stack pressure, stack humidity and intake temperature of the fuel cell. Specifically, the membrane electrode test module 300 is used to perform a membrane electrode characteristic test. During the test, a test condition is established based on the stack pressure, stack humidity and intake temperature of the fuel cell, and a characteristic test is carried out on the membrane electrode matched with the fuel cell. The current characteristic test of the membrane electrode under different pressures, humidity and intake temperatures is carried out to obtain the membrane electrode current under different test conditions; the temperature characteristic test of the stack under different pressures, humidity and intake temperatures is carried out to obtain the reaction temperature under different test conditions; the impedance test of the stack under different pressures, humidity and intake temperatures is carried out to obtain the test impedance under different test conditions.

[0047] For example, the membrane electrode test data finally measured can be counted in the format of Table 1 below, and the partition test data can be counted in the format of Table 2 below.

[0048]

[0049]

[0050] In combination with Table 1 and Table 2 above, it can be seen that the data processing module 200 of the present application is configured to: compare the partition test data with the membrane electrode test data, and when the partition test data and the membrane electrode test data are consistent, determine the characteristic data according to the test conditions corresponding to the membrane electrode test data.

[0051] Specifically, after obtaining the membrane electrode test data under different test conditions, carry out partition test experiments under different test conditions. Different test units in the partition test module 100 respectively test the partition current, partition temperature and partition impedance in the corresponding electrical test area under different test conditions; compare the partition current with the membrane electrode current in Table 1, compare the partition temperature with the reaction temperature in Table 1, and compare the partition impedance with the test impedance in Table 1. When all three are consistent, the pressure corresponding to the matched set of data is determined as the stack pressure in the electrical test area, and the humidity pressure corresponding to the matched set of data is determined as the stack humidity in the electrical test area. Therefore, through the correspondence between the test conditions and the test results in the membrane electrode characteristic test, the pressure and humidity in different electrical test areas are inferred in combination with the partition test data, without the need to establish a physical model, and the calculation method is simple and efficient.

[0052] Figure 6This is a schematic diagram of the structure of another fuel cell internal performance testing device provided in the first embodiment of the present invention. Figure 6 As shown, the fuel cell internal performance test device of the present application also includes: a performance analysis module 400, connected to the data processing module 200, for determining the characteristic data imbalance according to the characteristic data of each electrical test area, and issuing a corresponding improvement strategy when the characteristic data imbalance is greater than the preset balance threshold. Among them, the characteristic data imbalance represents the deviation rate between the characteristic data in each electrical test area and the average value of all characteristic data, such as the deviation rate between the stack pressure and the stack pressure mean, and the deviation rate between the stack humidity and the stack humidity mean.

[0053] Optionally, the improvement strategy includes at least one of the following: adjusting the bipolar plate flow channel structure based on the characteristic data, adjusting the structure of the membrane electrode based on the improved flow channel structure, and adjusting the test condition data based on the characteristic data.

[0054] Specifically, the stack pressure and stack humidity can be obtained based on the partition test, and the pressure and humidity distribution map can be established. The flow channel uniformity can be analyzed in combination with the pressure and humidity distribution map, and suggestions for improvement of the bipolar plate flow channel can be made. For example, if the stack pressure in any electrical test area is significantly higher than that in other areas, the flow channel flow rate in the electrical test area is increased; if the stack humidity in any electrical test area is significantly higher than that in other areas, the flow channel flow rate in the electrical test area is increased. Therefore, by analyzing the pressure and humidity distribution in different areas inside the stack, optimizing the bipolar plate flow channel structure, improving the uniformity of the bipolar plate flow channel, and carrying out customized development of membrane electrodes based on the improved flow channel uniformity, the overall performance of the stack can be improved and the service life of the stack can be extended.

[0055] Embodiment 2

[0056] Based on the same inventive concept, a second embodiment of the present invention provides a partition test module for realizing partition test data collection in the above-mentioned fuel cell internal performance test device.

[0057] See also Figure 3 and Figure 4 As shown, the partition test module 100 of the present application includes multiple test units (for example, 64 test units arranged in an array), each test unit corresponds to an electrical test area inside the battery stack, and the test unit is used to collect partition test data of the corresponding electrical test area. Figure 3As shown, any test unit includes: an independently set electrical parameter collection layer 110 and a circuit layer 120. The electrical parameter collection layer 110 can cover the electrical test area and is used to guide the carriers in the electrical test area to the circuit layer; the circuit layer 120 is used to calculate the partition test data according to the carriers and transmit the partition test data to the data processing module. In this embodiment, the partition test data includes at least one of the following: partition current, partition temperature and partition impedance.

[0058] See also Figure 4 As shown, the circuit layer 120 includes: a first resistor R1, a second resistor R2, a first conductive area A, a second conductive area B and an insulating area S; wherein the first conductive area A and the second conductive area B are used to connect the impedance test excitation source; the insulating area S is used to insulate and separate the first conductive area A and the second conductive area B; the first resistor R1 is connected across the first conductive area A and the second conductive area B, and the first resistor R1 is used to calculate the partition current according to the carrier; the second resistor R2 is set in the first conductive area A, and the second resistor R2 is used to collect the partition temperature.

[0059] See also Figure 4 As shown, the electrical parameter collection layer 110 of the present application is provided with a flow channel structure, and the surface of the flow channel structure is coated with a conductive coating.

[0060] In this embodiment, the partition test module has the functional modules and beneficial effects corresponding to the partition test data collection in the above embodiments, and the same parts are not repeated here.

[0061] Embodiment 3

[0062] Based on the same inventive concept, a third embodiment of the present invention provides a fuel cell internal performance testing method, which is implemented based on the fuel cell internal performance testing device provided in the first embodiment above and has the same technical effect as the fuel cell internal performance testing device.

[0063] Figure 7 This is a flow chart of a fuel cell internal performance testing method provided by Embodiment 3 of the present invention. Figure 7 As shown, the fuel cell internal performance testing method of the present application includes the following steps:

[0064] S1: Collect partition test data of multiple electrical test areas inside the battery stack based on the partition test module. The partition test module and the anode plate are symmetrically arranged on both sides of the membrane electrode. The partition test module includes multiple test units, and the test units correspond to the electrical test areas one by one. Two adjacent electrical test areas are insulated from each other.

[0065] S2: Determine characteristic data of each electrical test area according to the partition test data.

[0066] Optionally, the partition test data includes at least one of the following: partition current, partition temperature and partition impedance; the characteristic data includes at least one of the following: battery stack pressure and battery stack humidity.

[0067] Figure 8 This is a flow chart of another method for testing the internal performance of a fuel cell provided in the third embodiment of the present invention. Figure 8 As shown, the fuel cell internal performance testing method of the present application includes:

[0068] S1: Collect partition test data of multiple electrical test areas inside the battery stack based on the partition test module.

[0069] S2: Determine characteristic data of each electrical test area according to the partition test data.

[0070] S3: Acquire membrane electrode test data of the membrane electrode under at least one test condition.

[0071] S4: Compare the partition test data with the membrane electrode test data. When the partition test data and the membrane electrode test data are consistent, determine the characteristic data according to the test conditions corresponding to the membrane electrode test data.

[0072] Optionally, the fuel cell internal performance testing method of the present application further includes: determining characteristic data imbalance according to the characteristic data of each of the electrical test areas, and issuing a corresponding improvement strategy when the characteristic data imbalance is greater than a preset balance threshold.

[0073] Optionally, the improvement strategy includes at least one of the following: adjusting the bipolar plate channel structure based on the characteristic data, adjusting the structure of the membrane electrode based on the improved channel structure, and adjusting the test condition data based on the characteristic data.

[0074] Embodiment 4

[0075] Based on the above-mentioned embodiment three, embodiment four of the present invention provides an electronic device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the fuel cell internal performance testing method provided in the above-mentioned embodiment three.

[0076] Fig. 9A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0077] like Fig. 9 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0078] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0079] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the above-mentioned fuel cell internal performance test method.

[0080] In some embodiments, the above-mentioned fuel cell internal performance test method can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the fuel cell internal performance test method described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to execute the above-mentioned fuel cell internal performance test method by any other appropriate means (for example, by means of firmware).

[0081] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0082] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0083] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0084] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0085] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0086] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0087] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0088] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel cell internal performance testing device, the fuel cell include: Anode plate and membrane electrode, characterized in that the testing device comprises: A partition test module is symmetrically arranged on both sides of the membrane electrode with respect to the anode plate, the partition test module comprises a plurality of test units, each of the test units corresponds to an electrical test area inside the stack, and the test unit is used to collect partition test data of the corresponding electrical test area; The data processing module is connected to the test unit and is used to receive the partition test data collected by all the test units and determine the characteristic data of each electrical test area according to the partition test data.

2. The fuel cell internal performance testing device according to claim 1, It is characterized in that The test unit comprises: an electrical parameter collection layer and a circuit layer; The electrical parameter collection layer can cover the electrical test area and is used to guide the carriers in the electrical test area to the circuit layer; The circuit layer is used to calculate the partition test data according to the carriers and transmit the partition test data to the data processing module.

3. The fuel cell internal performance testing device according to claim 2, It is characterized in that The partition test data includes at least one of the following: partition current, partition temperature and partition impedance; The characteristic data includes at least one of the following: stack pressure and stack humidity.

4. The fuel cell internal performance testing device according to claim 3, It is characterized in that The circuit layer comprises: a first resistor, a second resistor, a first conductive area, a second conductive area and an insulating area; Wherein, the first conductive area and the second conductive area are used to connect an impedance test excitation source; The insulating region is used to insulate and separate the first conductive region from the second conductive region; The first resistor is connected across the first conductive area and the second conductive area, and the first resistor is used to calculate the partition current according to the carrier; The second resistor is disposed in the first conductive area, and is used to collect the zone temperature.

5. The fuel cell internal performance testing device according to claim 2, It is characterized in that The electrical parameter collection layer is provided with a flow channel structure, and the surface of the flow channel structure is coated with a conductive plating layer.

6. The fuel cell internal performance testing device according to any one of claims 1 to 5, It is characterized in that Also includes: A membrane electrode test module, used for obtaining membrane electrode test data of the membrane electrode under at least one test condition; Wherein, the membrane electrode test data includes at least one of the following: membrane electrode current, reaction temperature and test impedance.

7. The fuel cell internal performance testing device according to claim 6, It is characterized in that The test condition is established based on the stack pressure, stack humidity and intake air temperature of the fuel cell.

8. The fuel cell internal performance testing device according to claim 6, It is characterized in that The data processing module is configured to: compare the partition test data with the membrane electrode test data, and when the partition test data and the membrane electrode test data are consistent, determine the characteristic data according to the test conditions corresponding to the membrane electrode test data.

9. The fuel cell internal performance testing device according to any one of claims 1 to 5, It is characterized in that Also includes: The performance analysis module is connected to the data processing module and is used to determine the characteristic data imbalance according to the characteristic data of each electrical test area, and issue a corresponding improvement strategy when the characteristic data imbalance is greater than a preset balance threshold.

10. The fuel cell internal performance testing device according to claim 9, It is characterized in that The improvement strategy includes at least one of the following: adjusting the bipolar plate flow channel structure based on the characteristic data, adjusting the structure of the membrane electrode based on the improved flow channel structure, and adjusting the test condition data based on the characteristic data.

11. The fuel cell internal performance testing device according to any one of claims 1 to 5, It is characterized in that Two adjacent electrical testing areas are insulated from each other.

12. A partition test module, It is characterized in that A fuel cell internal performance testing device for use in any one of claims 1 to 11; The partition test module includes a plurality of test units, each of which corresponds to an electrical test area inside the battery stack, and the test unit is used to collect partition test data of the corresponding electrical test area; The test unit comprises: an electrical parameter collection layer and a circuit layer; The electrical parameter collection layer can cover the electrical test area and is used to guide the carriers in the electrical test area to the circuit layer; The circuit layer is used to calculate the partition test data according to the carriers and transmit the partition test data to the data processing module.

13. A method for testing the internal performance of a fuel cell, wherein the fuel cell include: Anode plate and membrane electrode, characterized in that the testing method comprises: Based on the partition test module, partition test data of multiple electrical test areas inside the battery stack are collected; wherein the partition test module and the anode plate are symmetrically arranged on both sides of the membrane electrode, and the partition test module includes multiple test units, and the test units correspond to the electrical test areas one by one; Characteristic data of each of the electrical test areas is determined according to the partition test data.

14. The fuel cell internal performance testing method according to claim 13, It is characterized in that Also includes: Acquiring membrane electrode test data of the membrane electrode under at least one test condition; The partition test data is compared with the membrane electrode test data. When the partition test data and the membrane electrode test data are consistent, the characteristic data is determined according to the test conditions corresponding to the membrane electrode test data.

15. An electronic device, It is characterized in that The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the fuel cell internal performance testing method according to claim 13 or 14.

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