Hydrogen fuel cell multifunctional detection device, detection method and production detection line

Abstract

The invention provides a hydrogen fuel cell multifunctional detection device, a detection method and a production detection line. In the device, an electric pile code scanning unit scans a bar code on a to-be-detected cell electric pile to obtain identity information of the cell electric pile; the air tightness detection unit conveys high-pressure gas into the battery stack to perform air tightness detection on the battery stack after limiting, fixing and sealing connection are performed on the battery stack; after the screws are connected in series and the positive and negative copper bars of the battery stack are connected, the insulation detection unit obtains the resistance value between the screws, the resistance value of the stack and the current value between the screws and the stack so as to carry out insulation detection on the battery stack; the central control unit controls the airtightness detection unit and the insulation detection unit to perform airtightness and insulation detection; and receiving the identity information, the air tightness detection data of the air tightness detection unit and the insulativity detection data of the insulation detection unit, and obtaining an air tightness detection result and an insulativity detection result of the corresponding electric pile based on the identity information, the air tightness detection data and the insulativity detection data.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel cell production detection, and in particular to a hydrogen fuel cell multifunctional detection device, a detection method and a production detection line. Background Art

[0002] A fuel cell is a device that generates electricity through an electrochemical reaction between hydrogen and oxygen. It has the advantages of high efficiency, no pollution, a wide operating temperature range, and low noise. It has a wide range of applications and development prospects in the fields of transportation, fixed power stations, etc. As a clean energy product, fuel cells have opened up a new way of energy utilization. Since the voltage of a single cell is low and cannot meet the needs of actual work, the fuel cell stack is composed of hundreds of single cells composed of bipolar plates and membrane electrodes stacked in series to meet the needs of high-power use. During the assembly process of the stack, the single cells need to be assembled into a compact stack structure through end plates and fasteners, and the pressing force is used to pressurize each battery component to make it in close contact to achieve a sealing effect.

[0003] Air tightness is a key indicator that must be strictly controlled during the production and application of fuel cells, and the stack must have good airtightness. The airtightness of the fuel cell directly affects the performance and safety of the fuel cell. Once a leak occurs, it will affect the performance of the fuel cell and may even cause serious consequences such as hydrogen combustion and explosion. During the production, transportation, storage and use of the fuel cell stack, there may be problems such as leakage or failure. Therefore, it is very necessary to conduct sealing detection.

[0004] Insulation is an important characteristic of fuel cell electrical safety, which determines whether the stack can be used safely. For stacks assembled by screw fastening, the through-connection between the screws and the front and rear plates of the fuel cell can easily affect the insulation of the fuel cell stack, which may cause greater safety hazards to the stack. Insulation is a necessary indicator for factory inspection of fuel cells. Fuel cell systems, bare stacks, and PACKs (battery packs) have strict requirements on insulation, especially during bench testing, loading and commissioning. In order to ensure the safety of personnel and equipment, relevant standards also make relevant requirements and explanations for the insulation resistance of fuel cells. In order to ensure the safety of the stack, it is necessary to test the insulation of the fuel cell stack.

[0005] The prior art already has schemes and equipment for the gas-tightness test and insulation detection of fuel cell stacks. However, the existing detection schemes and equipment have the following problems: 1) The existing scanning method is to manually use a handheld scanning gun to read the QR code on the end plate, which is prone to missing the code; 2) The existing gas-tightness test is time-consuming, and different test items require manual plugging and replacement of air pipes, and the test process is unstable, the results are inaccurate, and the manual operation is cumbersome; 3) The existing insulation detection is generally performed by manually using a handheld multimeter to perform insulation detection on the fuel cell stack, which is time-consuming and labor-intensive to operate, and the detection efficiency is low; 4) The existing gas-tightness test and insulation test results are generally recorded manually, and the detection data is difficult to integrate and analyze in real time.

[0006] The above shortcomings result in the inability to guarantee the quality of fuel cells in actual production, and also affect the efficiency of stack assembly, making it unsuitable for mass production of fuel cell stacks. Summary of the invention

[0007] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0008] To this end, a first object of the present invention is to provide a multifunctional detection device for a hydrogen fuel cell to improve detection efficiency and accuracy.

[0009] The second object of the present invention is to provide a multifunctional detection method for a hydrogen fuel cell.

[0010] The third object of the present invention is to provide a production and testing line for hydrogen fuel cells.

[0011] To achieve the above-mentioned purpose, the first aspect of the present invention proposes a multifunctional detection device for a hydrogen fuel cell, comprising a stack code scanning unit, an airtight detection unit, an insulation detection unit and a central control unit;

[0012] The battery stack scanning unit is used to scan the barcode on the battery stack to be detected to obtain the identity information of the battery stack;

[0013] The airtightness detection unit is used to deliver high-pressure gas to the inside of the battery stack after the battery stack is limited, fixed and sealed, so as to perform airtightness detection on the battery stack;

[0014] The insulation detection unit is used to obtain the resistance value between each screw, the resistance value of the stack, and the current value between the screw and the stack after the screws are connected in series and the positive and negative copper bars of the battery stack are connected, so as to perform insulation detection on the battery stack;

[0015] The central control unit is used to control the airtightness detection unit and the insulation detection unit to perform airtightness and insulation detection; and receive the identity information, the airtightness detection data of the airtightness detection unit and the insulation detection data of the insulation detection unit, and obtain the airtightness detection result and insulation detection result of the battery stack to be detected based on the identity information, the airtightness detection data and the insulation detection data.

[0016] In the multifunctional detection device for hydrogen fuel cells provided in the first aspect of the present invention, the airtight detection unit includes a receiving fixture, and the receiving fixture is provided with a positioning pin, a sealing gasket, a hydrogen inlet and outlet interface, an air inlet and outlet interface, and a water inlet and outlet interface. The positioning pin is used to limit and fix the battery stack, and the sealing gasket is used to achieve a sealed connection between the receiving fixture and the battery stack. The hydrogen inlet and outlet interface, the air inlet and outlet interface, and the water inlet and outlet interface are used to be connected to the corresponding interfaces of the battery stack.

[0017] In the multifunctional detection device for hydrogen fuel cells provided in the first aspect of the present invention, the airtight detection unit also includes a gas supply device and a gas flow testing device, the gas supply device is used to deliver high-pressure gas to the interior of the battery stack through a gas supply pipeline, and the gas flow testing device is arranged on the gas supply pipeline, and the gas flow testing device is used to detect the pressure and flow of the high-pressure gas in the gas supply pipeline.

[0018] In the multifunctional detection device for hydrogen fuel cells provided in the first aspect of the present invention, the insulation detection unit includes an insulation detection module, and the insulation detection module includes a high-voltage power supply, a digital resistance meter, an automatic test probe and an insulation base.

[0019] In the multifunctional detection device for hydrogen fuel cells provided in the first aspect of the present invention, the insulation detection unit further includes an environment control module, and the environment control module includes a coolant circulation simulation device, a reaction gas cavity simulation device, and a humidity condition simulation device.

[0020] To achieve the above-mentioned purpose, the second aspect of the present invention provides a multifunctional detection method for a hydrogen fuel cell, which is applicable to the multifunctional detection device for a hydrogen fuel cell provided in the first aspect of the present invention, and the method comprises:

[0021] Scanning the barcode on the battery stack to be tested using the battery stack scanning unit to obtain the identity information of the battery stack;

[0022] After the battery stack is fixed and sealed, the central control unit controls the airtightness detection unit to deliver high-pressure gas to the battery stack to detect the airtightness of the battery stack;

[0023] After the screws are connected in series and the positive and negative copper bars of the battery stack are connected, the insulation detection unit is used to obtain the resistance value between the screws, the resistance value of the battery stack, and the current value between the screws and the battery stack to perform insulation detection on the battery stack;

[0024] The central control unit receives the identity information, the airtightness detection data of the airtightness detection unit and the insulation detection data of the insulation detection unit, and obtains the airtightness detection result and the insulation detection result of the battery stack to be detected based on the identity information, the airtightness detection data and the insulation detection data.

[0025] In the multifunctional detection method for hydrogen fuel cells provided in the second aspect of the present invention, after the screws are connected in series and the positive and negative copper bars of the battery stack are connected, the insulation detection unit is used to obtain the resistance value between each screw, the stack resistance value, and the current value between the screw and the stack to perform insulation detection on the battery stack, including: controlling the screws in series and connecting the positive and negative copper bars of the battery stack; using the insulation detection unit to measure the resistance value between each screw; if the central control unit determines that the resistance value between each screw is less than the standard value, the insulation detection unit is used to measure the stack resistance value of the battery stack; if the central control unit determines that the stack resistance value tends to infinity, the insulation detection unit is used to measure the current value between the screw and the stack; if the central control unit determines that the current value between the screw and the stack is less than the maximum allowable current, the insulation detection result is good insulation.

[0026] The multifunctional detection method for hydrogen fuel cells provided in the second aspect of the present invention also includes: connecting the battery stack to an insulation detection unit; running a coolant circulation simulation device and testing the insulation resistance of the battery stack; using a humidity condition simulation device to perform moisture purge on the battery stack for a period of time, and testing the insulation resistance of the battery stack; using a reaction gas cavity simulation device to ventilate the reaction gas cavity of the battery stack, and testing the insulation resistance of the battery stack.

[0027] To achieve the above-mentioned purpose, the third aspect of the present invention proposes a hydrogen fuel cell production and inspection line, including a production line control system and at least one production inspection line; each production inspection line is equipped with a manipulator system and the hydrogen fuel cell multifunctional detection device provided by the first aspect of the present invention, and the production line control system controls the connection to the manipulator system, and the manipulator system is used to sequentially send the battery stack to be inspected into the battery stack scanning unit, airtightness detection unit, and insulation detection unit in the hydrogen fuel cell multifunctional detection device.

[0028] In the production and inspection line of hydrogen fuel cells provided in the third aspect of the present invention, the manipulator system is also used to transfer battery stacks with unqualified air tightness test results or unqualified insulation test results to unqualified product stations, and is also used to transfer battery stacks with qualified air tightness test results and qualified insulation test results to qualified product stations.

[0029] The present invention provides a multifunctional detection device, detection method and production detection line for hydrogen fuel cells, which include a battery stack scanning unit, an airtight detection unit, an insulation detection unit and a central control unit; the battery stack scanning unit is used to scan the barcode on the battery stack to be detected to obtain the identity information of the battery stack; the airtight detection unit is used to transport high-pressure gas to the inside of the battery stack after the battery stack is limited, fixed and sealed, so as to perform airtightness detection on the battery stack; the insulation detection unit is used to obtain the resistance value between each screw, the resistance value of the battery stack, and the current value between the screw and the battery stack after the screws are connected in series and the positive and negative copper bars of the battery stack are connected, so as to perform insulation detection on the battery stack; the central control unit is used to control the airtight detection unit and the insulation detection unit to perform airtightness and insulation detection; and receive the identity information, the airtightness detection data of the airtightness detection unit and the insulation detection data of the insulation detection unit, and obtain the airtightness detection result and insulation detection result of the corresponding battery stack to be detected based on the identity information, the airtightness detection data and the insulation detection data. In this case, the battery stack code scanning unit, the airtightness detection unit, the insulation detection unit and the central control unit are integrated, and the barcode on the battery stack to be detected is scanned by the battery stack code scanning unit to obtain the corresponding identity information, and the central control unit is used to control the airtightness detection unit to transport high-pressure gas to the inside of the battery stack for airtightness detection, and the central control unit is used to control the insulation detection unit to obtain the resistance value between each screw, the resistance value of the battery stack, and the current value between the screw and the battery stack, thereby realizing insulation detection. The central control unit obtains the airtightness detection result and the insulation detection result of the corresponding battery stack to be detected based on the identity information, the airtightness detection data and the insulation detection data. Compared with the existing manual scanning method, and the manual participation in the detection and result recording of the airtightness and insulation of the battery stack, the method of the present invention can be fully automated, which improves the detection efficiency. In addition, the present invention also obtains the insulation detection result by combining the resistance value between each screw, the resistance value of the battery stack, and the current value between the screw and the battery stack, thereby improving the detection accuracy.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0032] Figure 1 A block diagram of a multifunctional detection device for a hydrogen fuel cell provided by an embodiment of the present invention;

[0033] Figure 2 A flow chart of the airtightness detection process provided by an embodiment of the present invention;

[0034] Figure 3 A flow chart of the insulation detection process provided by an embodiment of the present invention;

[0035] Figure 4 A flow chart of a multifunctional detection method for a hydrogen fuel cell provided by an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of a production and testing line for a hydrogen fuel cell provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the embodiments of the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present invention as detailed in the appended claims.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. It should also be understood that the term "and / or" used in the present invention refers to and includes any or all possible combinations of one or more associated listed items.

[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0041] The present invention provides a multifunctional detection device, a detection method and a production detection line for a hydrogen fuel cell to improve detection efficiency and accuracy.

[0042] In a first embodiment, Figure 1 1 is a block diagram of a multifunctional detection device for a hydrogen fuel cell provided by an embodiment of the present invention. The multifunctional detection device for a hydrogen fuel cell in the present invention may be referred to as a detection device. Figure 1 As shown, the multifunctional detection device for hydrogen fuel cells includes a battery stack code scanning unit, an airtight detection unit, an insulation detection unit and a central control unit. The central control unit is connected to the battery stack code scanning unit, the airtight detection unit and the insulation detection unit respectively.

[0043] In this embodiment, the battery stack scanning unit is used to scan the barcode on the battery stack to be detected to obtain the identity information of the battery stack. The barcode can be a QR code or a barcode. The battery stack can be referred to as the battery stack.

[0044] Specifically, the stack scanning unit includes a scanner, a controller and a storage database. The scanner is used to scan the QR code or barcode on the hydrogen fuel cell stack to obtain the identity information of the battery stack. The controller is connected to the scanner to receive the identity information transmitted by the scanner and process and analyze it. The storage database is used to store the identity information of the hydrogen fuel cell stack and related data after processing and analysis. The stack scanning unit realizes the traceability of the identity information, quality and performance of the hydrogen fuel cell stack by accurately identifying and recording the identity of the hydrogen fuel cell stack.

[0045] In this embodiment, the airtightness detection unit is used to deliver high-pressure gas to the interior of the battery stack after the battery stack is limited, fixed and sealed, so as to perform airtightness detection on the battery stack.

[0046] In the present embodiment, the airtight detection unit includes a receiving fixture. The receiving fixture is provided with a positioning pin, a sealing gasket, a hydrogen inlet and outlet interface, an air inlet and outlet interface, and a water inlet and outlet interface. Specifically, the receiving fixture is used to support and fix the battery stack to be tested. A positioning pin is provided on each side of the receiving fixture. The positioning pin is used to limit and fix the battery stack. The receiving fixture is provided with a sealing gasket that matches the shape of the air inlet end plate. The sealing gasket is used to achieve a sealed connection between the receiving fixture and the battery stack. The panel of the receiving fixture is provided with a hydrogen inlet and outlet interface (i.e., a hydrogen inlet interface and a hydrogen outlet interface), an air inlet and outlet interface (i.e., an air inlet interface and an air outlet interface), and a water inlet and outlet interface (i.e., a water inlet interface and a water outlet interface). The hydrogen inlet and outlet interface, the air inlet and outlet interface, and the water inlet and outlet interface are used to connect with the corresponding interfaces of the battery stack (i.e., the hydrogen inlet and outlet, the air inlet and outlet, and the cooling water inlet and outlet of the battery stack).

[0047] In this embodiment, the airtightness detection unit also includes a gas supply device and a gas flow testing device. The gas supply device provides a gas source. The gas supply device is connected to the hydrogen inlet and outlet interface, the air inlet and outlet interface, and the water inlet and outlet interface on the panel of the receiving tooling through different gas supply pipelines. The gas supply device is used to transport high-pressure gas to the inside of the battery stack (such as the hydrogen cavity, water cavity and cavity inside the battery stack) through the gas supply pipeline. The gas flow testing device is arranged on the gas supply pipeline, and the gas flow testing device is used to detect the pressure and flow of the high-pressure gas in the gas supply pipeline. The gas flow testing device sends the detected pressure and flow of the high-pressure gas to the central control unit for processing and analysis, so as to determine whether the battery stack to be tested is leaking and the amount of leakage according to the changes in pressure and flow. In this way, the detection of the airtightness of the battery stack to be tested and the determination of the amount of leakage when a leak occurs are realized.

[0048] In this embodiment, after the battery stack is fixed and sealed, the central control unit controls the airtightness detection unit to work according to the corresponding setting steps to perform airtightness detection. Specifically, Figure 2 The following is a flow chart of the airtightness detection process provided by the embodiment of the present invention. Figure 2 As shown, the airtightness testing process includes:

[0049] 11) The battery stack is transported to the airtightness testing station. Specifically, the pressed and fastened battery stack is transported to the airtightness testing station by a robot system.

[0050] 12) The hydrogen inlet and outlet, air inlet and outlet, and cooling water inlet and outlet of the battery stack are connected to the pipeline. Specifically, the hydrogen inlet and outlet, air inlet and outlet, and cooling water inlet and outlet of the battery stack to be tested are connected to the corresponding interfaces of the receiving tooling on the airtight testing station in turn.

[0051] 13) The gas inlet and water outlet of the battery stack are sealed with the interface of the inspection tooling. Specifically, the central control unit starts the press, and the press head presses down to press the battery stack with a certain pressure, so that the hydrogen inlet and outlet, air inlet and outlet, and cooling water inlet and outlet of the battery stack are sealed with the corresponding interfaces of the receiving tooling on the airtight inspection station.

[0052] 14) Turn on the airtightness detection equipment and fill it with high-pressure gas. Specifically, the central control unit turns on the gas supply device and injects high-pressure gas into the hydrogen inlet, the air inlet and the cooling water inlet through the gas supply pipeline.

[0053] 15) Carry out hydrogen-air gas, hydrogen-air water, and three-chamber pressure maintenance tests to determine the airtightness results. Specifically, the central control unit controls the gas supply device to sequentially implement the stack three-chamber pressure maintenance, hydrogen-air water, and hydrogen-air airtightness test items. The gas flow test device sends the detection data under different test items to the central control unit to determine the airtightness of the stack.

[0054] 16) Record the airtightness test results and determine whether it is qualified or not; cancel the pipeline connection and the battery stack will be transported. Specifically, the central control unit lifts the press head, cancels the connection between the various interfaces of the battery stack and the corresponding interfaces of the receiving tooling, and the battery stack is tested at the airtightness test station. The central control unit records the airtightness test results (also called airtightness test results) and determines whether it is qualified or not. The battery stack that passes the airtightness test is transported to the insulation test station by the manipulator system, and the battery stack that fails the airtightness test is transported to the defective product station for temporary storage, pending further cause analysis and repair.

[0055] In this embodiment, the insulation detection unit is used to obtain the resistance value between each screw, the resistance value of the stack, and the current value between the screw and the stack after connecting the screws in series and the positive and negative copper bars of the battery stack, so as to perform insulation detection on the battery stack.

[0056] In this embodiment, the insulation detection unit includes an insulation detection module, which includes a high voltage power supply, a digital resistance meter, an automatic test probe and an insulation base. The insulation detection unit also includes an environment control module, which includes a coolant circulation simulation device, a reaction gas cavity simulation device and a humidity condition simulation device.

[0057] Specifically, the insulation detection unit includes an insulation detection module and an environmental control module. The insulation detection module includes a high-voltage power supply, a digital resistance meter, an automatic test probe and an insulating base. The automatic test probe contacts the positive and negative copper bars of the battery stack, and the digital resistance meter is connected to the test point (the location of the test point includes but is not limited to each screw) for detecting the insulation resistance value. The environmental control module includes a coolant circulation simulation device, a reaction gas cavity simulation device and a humidity condition simulation device. In the insulation detection method, the battery stack does not actually work, but the insulation resistance value and its changes of the battery stack are tested by simulating the temperature, humidity and other conditions of the battery stack in the working state. The insulation detection unit of the present invention not only detects the dry insulation of the fuel cell through the insulation detection module, but also uses the environmental control module to build a test platform for simulating the humidity, temperature changes and airflow of the three chambers of the battery stack in the actual working state. The qualified result of the battery stack after being detected by the insulation detection unit of the present invention is highly persuasive, thereby reducing the risk of insulation and conductivity of the fuel cell, saving time and cost for analyzing insulation problems, and improving the safety performance of the fuel cell equipment.

[0058] In this embodiment, after the screw rods are connected in series and the positive and negative copper bars of the battery stack are connected, the central control unit controls the insulation detection unit according to the corresponding setting steps, and processes and analyzes the insulation detection data output by the insulation detection unit to perform insulation detection. Specifically, Figure 3 This is a flow chart of the insulation detection process provided by an embodiment of the present invention. Figure 3 As shown in the figure, the insulation testing process includes:

[0059] 21) Connect the screws in series to connect the positive and negative copper bars of the stack. Specifically, connect the screws of the fastening device connecting the fuel cell intake end plate and the pressure plate in series to connect the positive copper bar and the negative copper bar of the stack.

[0060] 22) Measure the resistance value between each screw (if it is less than the standard value, proceed to the next step). Specifically, measure the resistance value between each screw, and if the resistance value between each screw is less than the standard value, proceed to the next step.

[0061] 23) Measure the resistance value of the fuel cell stack (if it tends to infinity, proceed to the next step). Specifically, measure the resistance value of the fuel cell stack. If the resistance value of the fuel cell stack tends to infinity, proceed to the next step.

[0062] 24) Measure the current value between the screw and the stack. If it is less than the maximum allowable current, the insulation is good. Specifically, measure the insulation current value between the screw of the fastening device and the fuel cell stack, and judge the insulation of the fuel cell stack: if the insulation current value between the screw and the fuel cell stack is less than the maximum allowable insulation current value of the fuel cell stack, output the test result that the insulation of the fuel cell stack is good.

[0063] 25) Use a coolant circulation simulation device to test the insulation resistance of the battery stack. Specifically, connect the battery stack to be tested to the insulation detection unit, control the coolant circulation simulation device in the insulation detection unit through the central control unit, and test the insulation resistance of the battery stack;

[0064] 26) Use a humidity condition simulation device to test the insulation resistance of the battery stack. Specifically, connect the battery stack to be tested to the insulation detection unit, and use the central control unit to control the humidity condition simulation device in the insulation detection unit to purge the battery stack with moisture for a period of time to test the insulation resistance of the battery stack;

[0065] 27) Use a reaction gas cavity simulation device to test the insulation resistance of the battery stack. Specifically, connect the battery stack to be tested to the insulation detection unit, and control the reaction gas cavity simulation device in the insulation detection unit through the central control unit to ventilate the reaction gas cavity of the battery stack to be tested, and test the insulation resistance of the battery stack.

[0066] In this embodiment, the central control unit is used to control the airtightness detection unit and the insulation detection unit to perform airtightness and insulation detection; and receive identity information, airtightness detection data of the airtightness detection unit and insulation detection data of the insulation detection unit, and obtain the airtightness detection results and insulation detection results of the battery stack to be detected based on the identity information, airtightness detection data and insulation detection data.

[0067] In this embodiment, the air tightness detection data includes the pressure and flow rate of the high-pressure gas in the gas supply pipeline.

[0068] In this embodiment, the insulation detection data includes the resistance value between each screw, the resistance value of the battery stack, and the current value between the screw and the battery stack.

[0069] In this embodiment, after receiving the identity information, the air tightness detection data of the air tightness detection unit and the insulation detection data of the insulation detection unit, the central control unit analyzes and processes the detection results in real time and generates a detection report.

[0070] In this embodiment, the central control unit includes a data acquisition module, a data analysis module, a report generation module and a communication module. The data acquisition module receives the data output by the battery stack scanning unit, the airtightness detection unit and the insulation detection unit, and the data analysis module performs multi-dimensional data processing and analysis on the received data. The report generation module converts the results into a visual report or a digital test report. The communication module supports remote data transmission and monitoring. Through the communication module, the manufacturing execution system (MES system) is connected to monitor and manage the production and testing processes in real time to ensure that each battery stack undergoes strict airtightness testing. This allows the connection with the MES system for archiving and quality traceability.

[0071] The following is an embodiment of the method of the present invention. For details not disclosed in the embodiment of the method of the present invention, please refer to the embodiment of the device of the present invention. The method embodiment of the present invention proposes a multifunctional detection method for hydrogen fuel cells. The multifunctional detection method for hydrogen fuel cells is applicable to the multifunctional detection device for hydrogen fuel cells of the above-mentioned device embodiment. The multifunctional detection method for hydrogen fuel cells of the present invention can be referred to as a detection method.

[0072] Figure 4 This is a flow chart of the multifunctional detection method for a hydrogen fuel cell provided in an embodiment of the present invention.

[0073] like Figure 4 As shown, the multifunctional detection method of hydrogen fuel cell comprises:

[0074] Step S101, using a battery stack scanning unit to scan a barcode on a battery stack to be inspected to obtain identity information of the battery stack.

[0075] In step S101, the stacked, press-assembled and fastened hydrogen fuel cell stack is transported from the assembly line to the code scanning and detection unit station through the production transfer system. The stack code scanning unit first scans the QR code or barcode on the hydrogen fuel cell stack to obtain the identity information of the stack, and records and stores the information obtained after scanning. Then the stack is transported to the airtightness detection station through the robot system.

[0076] Step S102, after the battery stack is limited, fixed and sealed, the central control unit controls the airtightness detection unit to deliver high-pressure gas to the inside of the battery stack to perform airtightness detection on the battery stack.

[0077] The airtightness detection process in step S102 may be specifically described in the above-mentioned device embodiment, which will not be repeated here.

[0078] Step S103, after the screws are connected in series and the positive and negative copper bars of the battery stack are connected, the insulation detection unit is used to obtain the resistance value between the screws, the resistance value of the battery stack, and the current value between the screws and the battery stack to perform insulation detection on the battery stack.

[0079] In step S103, after the screws are connected in series and the positive and negative copper bars of the battery stack are connected, the insulation detection unit is used to obtain the resistance value between each screw, the resistance value of the battery stack, and the current value between the screw and the battery stack to perform insulation detection on the battery stack, including: controlling the screws in series and connecting the positive and negative copper bars of the battery stack; using the insulation detection unit to measure the resistance value between each screw; if the central control unit determines that the resistance value between each screw is less than the standard value, the insulation detection unit is used to measure the stack resistance value of the battery stack; if the central control unit determines that the stack resistance value tends to infinity, the insulation detection unit is used to measure the current value between the screw and the battery stack; if the central control unit determines that the current value between the screw and the battery stack is less than the maximum allowable current, the insulation detection result is that the insulation is good.

[0080] In some embodiments, step S103 also includes: connecting the battery stack to the insulation detection unit; running the coolant circulation simulation device and testing the insulation resistance of the battery stack; using the humidity condition simulation device to perform moisture purge on the battery stack for a period of time, and testing the insulation resistance of the battery stack; using the reaction gas cavity simulation device to ventilate the reaction gas cavity of the battery stack, and testing the insulation resistance of the battery stack.

[0081] The insulation detection process in step S103 may be specifically described in the above-mentioned device embodiment, which will not be repeated here.

[0082] In step S104, the central control unit receives the identity information, the airtightness detection data of the airtightness detection unit and the insulation detection data of the insulation detection unit, and obtains the airtightness detection result and the insulation detection result of the battery stack to be detected based on the identity information, the airtightness detection data and the insulation detection data.

[0083] It should be noted that the aforementioned explanation of the embodiment of the hydrogen fuel cell multifunctional detection device is also applicable to the hydrogen fuel cell multifunctional detection method of this embodiment, and will not be repeated here.

[0084] The embodiment of the present invention also proposes a production and testing line for hydrogen fuel cells. The production and testing line for hydrogen fuel cells of the present invention includes a production line control system and at least one production and testing line; each production and testing line is equipped with a manipulator system and a hydrogen fuel cell multifunctional testing device provided by the device embodiment of the present invention, and the production line control system controls the connection to the manipulator system, and the manipulator system is used to sequentially send the battery stack to be tested into the battery stack scanning unit, the airtightness detection unit, and the insulation detection unit in the hydrogen fuel cell multifunctional testing device.

[0085] Each production inspection line is equipped with two workstations, namely, a qualified product workstation and a non-qualified product workstation. The manipulator system is also used to transfer battery stacks with unqualified air tightness test results or unqualified insulation test results to the non-qualified product workstation, and is also used to transfer battery stacks with qualified air tightness test results and qualified insulation test results to the qualified product workstation.

[0086] In some embodiments, each production inspection line can be equipped with multiple multifunctional inspection devices, and an automated manipulator system is used to deliver the battery stack to be inspected into each multifunctional inspection device in turn. Through the parallel configuration of multiple multifunctional inspection devices, simultaneous inspection of multiple stations can be achieved, thereby improving the inspection capability of the production line. An automated manipulator system is configured to be responsible for the automatic handling, loading and unloading of the battery stack, reducing manual operations and improving production efficiency. The linkage between the communication interface and the production control system ensures real-time monitoring and feedback of the inspection data; through the integration of the production inspection line, the production efficiency and product quality control capabilities are significantly improved.

[0087] Figure 5 This is a schematic diagram of a production and testing line for a hydrogen fuel cell provided in an embodiment of the present invention.

[0088] like Figure 5 As shown, in the production and testing line of the hydrogen fuel cell, the stacked and pressed hydrogen fuel cell stack is transported from the assembly line to the code scanning and testing unit station through the production transfer system, and the central control unit controls the stack code scanning unit to start, and the stack code scanning unit first scans the QR code or barcode on the hydrogen fuel cell stack to obtain the corresponding identity information and send it to the central control unit. Then the battery stack is transported to the airtightness testing station through the manipulator system, and the central control unit controls the stack airtightness testing unit (referred to as the airtightness testing unit) to perform airtightness testing on the battery stack. The central control unit determines whether the airtightness is qualified based on the airtightness testing data. If the airtightness is unqualified (i.e., airtightness NG), the unqualified airtight stack is transported to the unqualified product station (such as the airtightness NG station) for temporary storage; if the airtightness is qualified (i.e., airtightness OK), the battery stack is transported to the insulation testing station through the manipulator system. The central control unit performs insulation detection on the battery stack by controlling the battery stack insulation detection unit (referred to as the insulation detection unit). The central control unit determines whether the insulation is qualified based on the insulation detection data. If the insulation is unqualified (i.e., insulation NG), the battery stack with unqualified insulation is transferred to the unqualified product station (such as the insulation NG station) for temporary storage; if the insulation is qualified (i.e., insulation OK), the battery stack is transferred to the qualified product station through the robot system.

[0089] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0090] In an embodiment of the present invention, the device includes a battery stack scanning unit, an airtight detection unit, an insulation detection unit and a central control unit; the battery stack scanning unit is used to scan the barcode on the battery stack to be detected to obtain the identity information of the battery stack; the airtight detection unit is used to deliver high-pressure gas to the inside of the battery stack after the battery stack is limited and fixed and sealed to perform airtightness detection on the battery stack; the insulation detection unit is used to obtain the resistance value between each screw, the stack resistance value, and the current value between the screw and the stack after the screws are connected in series and the positive and negative copper bars of the battery stack are connected to perform insulation detection on the battery stack; the central control unit is used to control the airtight detection unit and the insulation detection unit to perform airtightness and insulation detection; and receive the identity information, the airtightness detection data of the airtightness detection unit and the insulation detection data of the insulation detection unit, and obtain the airtightness detection result and insulation detection result of the corresponding battery stack to be detected based on the identity information, the airtightness detection data and the insulation detection data. In this case, the battery stack code scanning unit, the airtightness detection unit, the insulation detection unit and the central control unit are integrated, and the barcode on the battery stack to be detected is scanned by the battery stack code scanning unit to obtain the corresponding identity information, and the central control unit is used to control the airtightness detection unit to transport high-pressure gas to the inside of the battery stack for airtightness detection, and the central control unit is used to control the insulation detection unit to obtain the resistance value between each screw, the resistance value of the battery stack, and the current value between the screw and the battery stack, thereby realizing insulation detection. The central control unit obtains the airtightness detection result and the insulation detection result of the corresponding battery stack to be detected based on the identity information, the airtightness detection data and the insulation detection data. Compared with the existing manual scanning method, and the manual participation in the detection and result recording of the airtightness and insulation of the battery stack, the method of the present invention can be fully automated, which improves the detection efficiency. In addition, the present invention also obtains the insulation detection result by combining the resistance value between each screw, the resistance value of the battery stack, and the current value between the screw and the battery stack, thereby improving the detection accuracy.

[0091] The multifunctional detection device, method and production inspection line disclosed in the present invention are aimed at the shortcomings of the existing fuel cell stack production technology to solve the problems of low detection efficiency, insufficient precision, poor stability, cumbersome manual operation, and difficult data integration in the existing technology. Specifically, the problems of slow beat and poor accuracy in the gas tightness test and insulation test of the stack are solved, and multiple hydrogen fuel cell stacks can be tested at the same time, the detection efficiency is improved, and the automation and integration of the detection process are realized. The technical level of the on-site operators is low, and it is suitable for batch production of the stack; reduce the number of manual operations and equipment, and reduce production costs; improve the accuracy and reliability of gas tightness and insulation detection of the stack, reduce the risk of fuel cell leakage and insulation conductivity, and ensure the safety and consistency of the fuel cell stack; realize the real-time collection and analysis of detection data, and improve the intelligent level of the fuel cell production line. The present invention integrates and modularizes the multifunctional detection device into a mass production detection line. When the detection process is started, the central control unit controls the work of each unit in the multifunctional detection device in turn according to the preset detection steps, collects data and performs real-time analysis, generates a final quality inspection report, and can store or upload it to the cloud for remote access. This enables full-process testing of fuel cell stacks, ensures product quality, and realizes automated operations.

[0092] The accompanying drawings show schematic diagrams of structures according to embodiments disclosed in the present invention. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0093] 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 disclosed in the present invention can be achieved, and the present invention is not limited here.

[0094] 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 multifunctional detection device for a hydrogen fuel cell, characterized in that: It includes a battery stack scanning unit, an air tightness detection unit, an insulation detection unit and a central control unit; The battery stack scanning unit is used to scan the barcode on the battery stack to be detected to obtain the identity information of the battery stack; The airtightness detection unit is used to deliver high-pressure gas to the inside of the battery stack after the battery stack is limited, fixed and sealed, so as to perform airtightness detection on the battery stack; The insulation detection unit is used to obtain the resistance value between each screw, the resistance value of the stack, and the current value between the screw and the stack after the screws are connected in series and the positive and negative copper bars of the battery stack are connected, so as to perform insulation detection on the battery stack; The central control unit is used to control the airtightness detection unit and the insulation detection unit to perform airtightness and insulation detection; and receive the identity information, the airtightness detection data of the airtightness detection unit and the insulation detection data of the insulation detection unit, and obtain the airtightness detection result and insulation detection result of the battery stack to be detected based on the identity information, the airtightness detection data and the insulation detection data.

2. The multifunctional detection device for hydrogen fuel cells according to claim 1, characterized in that: The airtight detection unit includes a receiving fixture, which is provided with a positioning pin, a sealing gasket, a hydrogen inlet and outlet interface, an air inlet and outlet interface, and a water inlet and outlet interface. The positioning pin is used to limit and fix the battery stack, the sealing gasket is used to achieve a sealed connection between the receiving fixture and the battery stack, and the hydrogen inlet and outlet interface, the air inlet and outlet interface, and the water inlet and outlet interface are used to be connected to the corresponding interfaces of the battery stack.

3. The multifunctional detection device for hydrogen fuel cells according to claim 2, characterized in that: The airtightness detection unit also includes a gas supply device and a gas flow testing device. The gas supply device is used to transport high-pressure gas to the inside of the battery stack through a gas supply pipeline. The gas flow testing device is arranged on the gas supply pipeline. The gas flow testing device is used to detect the pressure and flow of the high-pressure gas in the gas supply pipeline.

4. The multifunctional detection device for hydrogen fuel cells according to claim 1, characterized in that: The insulation detection unit comprises an insulation detection module, and the insulation detection module comprises a high voltage power supply, a digital resistance meter, an automatic test probe and an insulation base.

5. The multifunctional detection device for hydrogen fuel cells according to claim 4, characterized in that: The insulation detection unit further comprises an environment control module, and the environment control module comprises a cooling liquid circulation simulation device, a reaction gas cavity simulation device and a humidity condition simulation device.

6. A multifunctional detection method for a hydrogen fuel cell, characterized in that: The multifunctional detection device for hydrogen fuel cells according to any one of claims 1 to 5, wherein the method comprises: Scanning the barcode on the battery stack to be tested using the battery stack scanning unit to obtain the identity information of the battery stack; After the battery stack is fixed and sealed, the central control unit controls the airtightness detection unit to deliver high-pressure gas to the battery stack to detect the airtightness of the battery stack; After the screws are connected in series and the positive and negative copper bars of the battery stack are connected, the insulation detection unit is used to obtain the resistance value between the screws, the resistance value of the battery stack, and the current value between the screws and the battery stack to perform insulation detection on the battery stack; The central control unit receives the identity information, the airtightness detection data of the airtightness detection unit and the insulation detection data of the insulation detection unit, and obtains the airtightness detection result and the insulation detection result of the battery stack to be detected based on the identity information, the airtightness detection data and the insulation detection data.

7. The multifunctional detection method for hydrogen fuel cells according to claim 6, characterized in that: After the screws are connected in series and the positive and negative copper bars of the battery stack are connected, the insulation detection unit is used to obtain the resistance value between the screws, the resistance value of the battery stack, and the current value between the screws and the battery stack to perform insulation detection on the battery stack, including: Control the series connection screws and connect the positive and negative copper bars of the battery stack; use the insulation detection unit to measure the resistance value between each screw; If the central control unit determines that the resistance values ​​between the screws are all less than the standard value, the insulation detection unit is used to measure the stack resistance value of the battery stack; If the central control unit determines that the resistance value of the battery stack tends to infinity, the insulation detection unit is used to measure the current value between the screw and the battery stack; If the central control unit determines that the current value between the screw and the fuel cell stack is less than the maximum allowable current, the insulation test result is that the insulation is good.

8. The multifunctional detection method for hydrogen fuel cells according to claim 6, characterized in that: Also includes: Connecting the battery stack to an insulation detection unit; Run the coolant circulation simulation device and test the insulation resistance of the battery stack; Use a humidity condition simulation device to purge the battery stack with moisture for a period of time to test the insulation resistance of the battery stack; The reaction gas cavity simulation device is used to ventilate the reaction gas cavity of the battery stack and test the insulation resistance of the battery stack.

9. A production and testing line for hydrogen fuel cells, characterized in that: It includes a production line control system and at least one production inspection line; each production inspection line is equipped with a manipulator system and the hydrogen fuel cell multifunctional inspection device according to any one of claims 1 to 5, the production line control system controls the connection to the manipulator system, and the manipulator system is used to sequentially send the battery stack to be inspected into the battery stack scanning unit, air tightness inspection unit, and insulation inspection unit in the hydrogen fuel cell multifunctional inspection device.

10. The production and testing line of hydrogen fuel cells according to claim 9, characterized in that: The robot system is also used to transfer battery stacks with unqualified air tightness test results or unqualified insulation test results to unqualified product stations, and is also used to transfer battery stacks with qualified air tightness test results and qualified insulation test results to qualified product stations.

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