Fuel cell engine offline detection method, device, equipment, medium and program

Abstract

The invention relates to the technical field of vehicles, in particular to a fuel cell engine offline detection method and device, equipment, a medium and a program.The method comprises the steps that the current pipeline connection state of a to-be-detected engine is detected; if the current pipeline connection state is a qualified state, air tightness detection and cooling liquid filling detection are carried out on the to-be-detected engine, and ion concentration and insulation resistance detection is carried out after air tightness detection and cooling liquid filling detection are completed; and if the ion concentration and insulation resistance detection results are qualified, operating the to-be-detected engine, and obtaining an offline detection result of the to-be-detected engine according to the operation result of the to-be-detected engine. Therefore, the problems of high failure rate, long troubleshooting time, high manpower and material resource cost and the like of the current fuel cell engine offline detection are solved, the success rate of the fuel cell engine offline detection is improved, the troubleshooting time is shortened, and the manpower and material resource cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a fuel cell engine offline detection method, device, equipment, medium and program. Background Art

[0002] As the environment deteriorates and the climate warms, countries around the world gradually announce the time to ban the sale of fuel vehicles, and new energy vehicles are gradually becoming a thing of the past. Hydrogen fuel cell vehicles, due to their zero emissions, fast hydrogen refueling, and long driving range, have gradually gained attention from all countries and become one of the important development directions in the field of new energy vehicles in the future. Fuel cell engines are facing the gradual mass production, and a large number of fuel cell engines need to be tested offline.

[0003] However, there is currently no clear off-line inspection method, the off-line inspection failure rate of fuel cell engines is high, the troubleshooting time is long, the cost is high, and a lot of manpower and material resources are wasted, which needs to be solved urgently. Summary of the invention

[0004] The present invention provides a fuel cell engine offline detection method, device, equipment, medium and program to solve the problems of high failure rate of fuel cell engine offline detection, long troubleshooting time, high manpower and material costs, etc., improve the success rate of fuel cell engine offline detection, reduce the troubleshooting time, and reduce manpower and material costs.

[0005] A first aspect of the present invention provides a fuel cell engine offline detection method, comprising the following steps: detecting the current pipeline connection status of the engine to be detected; if the current pipeline connection status is a qualified state, performing an air tightness test and a coolant filling test on the engine to be detected, and performing an ion concentration and insulation resistance test after completing the air tightness test and the coolant filling test; if the ion concentration and insulation resistance test results are qualified, running the engine to be detected, and obtaining the offline detection result of the engine to be detected based on the running result of the engine to be detected.

[0006] Furthermore, in one embodiment, before performing the air tightness test and the coolant filling test on the engine to be tested, it also includes: flashing the fuel cell engine controller of the engine to be tested; if the flashing of the fuel cell engine controller is completed, then detecting the communication status of at least one sensor and multiple actuators of the engine to be tested.

[0007] Further, in one embodiment, the detecting the current pipeline connection status of the engine to be detected includes: detecting the engine pipeline connection status of the engine to be detected; if the engine pipeline connection status is a connected state, detecting the external hydrogen supply pipeline connection status, the main water pipeline connection status and the auxiliary water pipeline connection status of the engine to be detected; if the external hydrogen supply pipeline connection status, the main water pipeline connection status and the auxiliary water pipeline connection status are all in a connected state, determining the current pipeline connection status to be the qualified state.

[0008] Further, in one embodiment, the air tightness test and coolant filling test are performed on the engine to be tested, and the ion concentration and insulation resistance test are performed after completing the air tightness test and the coolant filling test, including: based on a first pressure value, inflating to a first pressure section of the hydrogen circuit, and detecting the hydrogen concentration at a first pipeline connection; if the hydrogen concentration at the first pipeline connection is less than a first preset concentration, manually obtaining a first pressure drop value of the first pressure section of the hydrogen circuit within a first preset time period; if the first pressure drop value is less than a first preset threshold value, inflating to a second pressure section of the hydrogen circuit based on a second pressure value, and detecting the hydrogen concentration at a second pipeline connection; if the hydrogen concentration at the second pipeline connection is less than a second preset concentration, manually obtaining a second pressure drop value of the second pressure section of the hydrogen circuit within a second preset time period; if the second pressure drop value is less than a second preset threshold value, determining that the air tightness test result of the engine to be tested is qualified.

[0009] Further, in one embodiment, the air tightness test and coolant filling test are performed on the engine to be tested, and the ion concentration and insulation resistance test are performed after the air tightness test and the coolant filling test are completed, and the following also includes: cleaning the thermal management subsystem components of the engine to be tested, and measuring the ion concentration of the coolant to be added after the cleaning is completed; if the ion concentration of the coolant to be added is less than the preset ion concentration, the coolant to be added is added to the main water channel and the auxiliary water channel, and the coolant pressure at the stack outlet is obtained after the filling is completed; if the coolant pressure at the stack outlet is greater than the preset pressure, the three-way valve of the engine to be tested is controlled to open, and the change value of the coolant pressure at the stack outlet within a third preset time period is obtained; if the change value of the coolant pressure at the stack outlet is less than the preset change threshold, the ion concentration of the coolant at the stack outlet is detected; if the ion concentration of the coolant at the stack outlet is less than the preset ion concentration, the insulation resistance of the engine to be tested is detected, and if the insulation resistance of the engine to be tested is greater than the preset resistance value, the ion concentration and insulation resistance test results are determined to be qualified.

[0010] Further, in one embodiment, the operating the engine to be detected and obtaining the offline detection result of the engine to be detected based on the operating result of the engine to be detected includes: starting the engine to be detected, loading the engine to be detected according to a preset loading strategy, and determining whether the engine to be detected reaches a target power; if the engine to be detected reaches the target power, determining that the offline detection result of the engine to be detected is qualified.

[0011] The fuel cell engine offline detection method provided in an embodiment of the present invention can provide a systematic and modular method for fuel cell engine offline detection. The fuel cell engine offline detection result is obtained by performing engine air tightness detection, coolant detection, ion concentration detection and insulation resistance detection, thereby improving the success rate of fuel cell engine offline detection, reducing the troubleshooting time, and greatly reducing manpower and material costs.

[0012] A second aspect of the present invention provides a fuel cell engine offline detection device, comprising: a first detection module, used to detect the current pipeline connection status of the engine to be detected; a second detection module, used to perform an air tightness test and a coolant filling test on the engine to be detected when the current pipeline connection status is a qualified state, and perform an ion concentration and insulation resistance test after completing the air tightness test and the coolant filling test; a third detection module, used to operate the engine to be detected when the ion concentration and insulation resistance test results are qualified, and obtain the offline detection result of the engine to be detected based on the operation result of the engine to be detected.

[0013] Furthermore, in one embodiment, before performing the air tightness test and the coolant filling test on the engine to be tested, the first detection module is also used to: flash the fuel cell engine controller of the engine to be tested; if the flashing of the fuel cell engine controller is completed, then detect the communication status of at least one sensor and multiple actuators of the engine to be tested.

[0014] Further, in one embodiment, the first detection module is specifically used to: detect the engine pipeline connection status of the engine to be detected; if the engine pipeline connection status is a connected state, then detect the external hydrogen supply pipeline connection status, the main water pipeline connection status and the auxiliary water pipeline connection status of the engine to be detected; if the external hydrogen supply pipeline connection status, the main water pipeline connection status and the auxiliary water pipeline connection status are all connected states, then determine that the current pipeline connection state is the qualified state.

[0015] Further, in one embodiment, the second detection module is specifically used to: based on the first pressure value, inflate to the first pressure section of the hydrogen circuit, and detect the hydrogen concentration at the first pipeline connection; if the hydrogen concentration at the first pipeline connection is less than the first preset concentration, then manually obtain the first pressure drop value of the first pressure section of the hydrogen circuit within a first preset time period; if the first pressure drop value is less than the first preset threshold value, then based on the second pressure value, inflate to the second pressure section of the hydrogen circuit, and detect the hydrogen concentration at the second pipeline connection; if the hydrogen concentration at the second pipeline connection is less than the second preset concentration, then manually obtain the second pressure drop value of the second pressure section of the hydrogen circuit within a second preset time period; if the second pressure drop value is less than the second preset threshold value, it is determined that the air tightness test result of the engine to be tested is qualified.

[0016] Furthermore, in one embodiment, the second detection module is also used for: cleaning the thermal management subsystem components of the engine to be tested, and measuring the ion concentration of the coolant to be added after the cleaning is completed; if the ion concentration of the coolant to be added is less than the preset ion concentration, filling the coolant to be added in the main water channel and the auxiliary water channel, and obtaining the coolant pressure at the stack outlet after the filling is completed; if the coolant pressure at the stack outlet is greater than the preset pressure, controlling the three-way valve of the engine to be tested to open, and obtaining the change value of the coolant pressure at the stack outlet within a third preset time period; if the change value of the coolant pressure at the stack outlet is less than the preset change threshold, detecting the ion concentration of the coolant at the stack outlet; if the ion concentration of the coolant at the stack outlet is less than the preset ion concentration, detecting the insulation resistance of the engine to be tested, and if the insulation resistance of the engine to be tested is greater than the preset resistance, determining that the ion concentration and insulation resistance test results are qualified.

[0017] Furthermore, in one embodiment, the third detection module is specifically used to: start the engine to be detected, load the engine to be detected according to a preset loading strategy, and determine whether the engine to be detected reaches the target power; if the engine to be detected reaches the target power, then the off-line detection result of the engine to be detected is determined to be qualified.

[0018] The fuel cell engine offline detection device provided in accordance with an embodiment of the present invention can provide a systematic and modular method for fuel cell engine offline detection. The fuel cell engine offline detection result is obtained by performing engine air tightness detection, coolant detection, ion concentration detection and insulation resistance detection, thereby improving the success rate of fuel cell engine offline detection, reducing the troubleshooting time, and greatly reducing manpower and material costs.

[0019] A third aspect of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a fuel cell engine offline detection method as described in any one of the above.

[0020] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-described fuel cell engine offline detection methods.

[0021] A fifth aspect of the present invention provides a computer program product, including a computer program, which is executed to implement a fuel cell engine offline detection method as described in any one of the above.

[0022] 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

[0023] 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:

[0024] Figure 1 A flowchart of a fuel cell engine offline detection method provided according to an embodiment of the present invention;

[0025] Figure 2 A flow chart of a method for detecting hydrogen gas line air tightness provided by a specific embodiment of the present invention;

[0026] Figure 3 A flow chart of an insulation detection method of a fuel cell engine offline detection method provided by a specific embodiment of the present invention;

[0027] Figure 4 A flowchart of a fuel cell engine offline detection method provided by a specific embodiment of the present invention;

[0028] Figure 5 A schematic block diagram of a fuel cell engine offline detection device provided according to an embodiment of the present invention;

[0029] Figure 6 The present invention is a block diagram of an electronic device provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] 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.

[0031] The following describes the fuel cell engine offline detection method of the embodiment of the present invention with reference to the accompanying drawings. In view of the problems mentioned in the above background technology, such as high failure rate of fuel cell engine offline detection, long troubleshooting time, high manpower and material cost, the present invention provides a fuel cell engine offline detection method, in which a systematic and modular method can be provided for fuel cell engine offline detection, and the fuel cell engine offline detection result is obtained by engine air tightness detection, coolant detection, ion concentration detection and insulation resistance detection. As a result, the success rate of fuel cell engine offline detection is improved, the troubleshooting time is reduced, and the manpower and material cost is greatly reduced.

[0032] Specifically, Figure 1 A schematic flow chart of a fuel cell engine offline detection method provided in an embodiment of the present invention.

[0033] like Figure 1 As shown, the fuel cell engine offline detection method includes the following steps:

[0034] In step S101, the current pipeline connection state of the engine to be tested is detected.

[0035] Among them, in one embodiment, detecting the current pipeline connection status of the engine to be detected includes: detecting the engine pipeline connection status of the engine to be detected; if the engine pipeline connection status is a connected state, then detecting the external hydrogen supply pipeline connection status, the main water pipeline connection status and the auxiliary water pipeline connection status of the engine to be detected; if the external hydrogen supply pipeline connection status, the main water pipeline connection status and the auxiliary water pipeline connection status are all in a connected state, then determining that the current pipeline connection status is a qualified state.

[0036] The pipeline connection status is divided into a connected state and an unconnected state.

[0037] Specifically, when the engine pipeline connection state is in the connected state, and the engine's external hydrogen supply pipeline connection state, the main water pipeline connection state, and the auxiliary water pipeline connection state are also in the connected state, the current pipeline connection state is determined to be a qualified state; if there is one or more unconnected states in the engine pipeline connection state, the engine's external hydrogen supply pipeline connection state, the main water pipeline connection state, and the auxiliary water pipeline connection state, the current pipeline connection state is determined to be an unqualified state. In step S102, if the current pipeline connection state is a qualified state, the engine to be tested is subjected to air tightness testing and coolant filling testing, and after completing the air tightness testing and coolant filling testing, the ion concentration and insulation resistance testing are performed.

[0038] Among them, in one embodiment, the engine to be tested is subjected to an air tightness test and a coolant filling test, and after the completion of the air tightness test and the coolant filling test, an ion concentration and an insulation resistance test are performed, including: based on a first pressure value, inflating to a first pressure section of the hydrogen circuit, and detecting the hydrogen concentration at the first pipeline connection; if the hydrogen concentration at the first pipeline connection is less than a first preset concentration, manually obtaining a first pressure drop value of the first pressure section of the hydrogen circuit within a first preset time period; if the first pressure drop value is less than a first preset threshold value, inflating to a second pressure section of the hydrogen circuit based on a second pressure value, and detecting the hydrogen concentration at the second pipeline connection; if the hydrogen concentration at the second pipeline connection is less than the second preset concentration, manually obtaining a second pressure drop value of the second pressure section of the hydrogen circuit within a second preset time period; if the second pressure drop value is less than the second preset threshold value, the air tightness test result of the engine to be tested is determined to be qualified.

[0039] Among them, the ion concentration test needs to be carried out after the main water circuit coolant and the auxiliary water circuit coolant are filled, and the insulation resistance test needs to be carried out after the high-pressure end and the low-pressure end of the hydrogen circuit are tested and the ion concentration test is completed. The first pressure value, the first pressure section, the first preset concentration, the first preset threshold, the second pressure value, the second pressure section, the second preset concentration and the second preset threshold can all be set by relevant technicians according to experiments, or according to data obtained by computer simulation, and are not limited here.

[0040] It should be understood that in the field of hydrogen fuel cells, air tightness testing is particularly important. Hydrogen is a gas that is extremely easy to leak, flammable and explosive. If the air tightness of hydrogen fuel cannot be guaranteed, it may cause serious traffic accidents and cause great loss of life and property. Therefore, it is crucial to ensure that the fuel cell system has good air tightness.

[0041] The following will be combined Figure 2 A hydrogen path air tightness detection method of a fuel cell engine offline detection method provided by a specific embodiment of the present invention is described in detail.

[0042] Figure 2 The present invention provides a flowchart of a method for detecting hydrogen gas line air tightness according to a specific embodiment of the present invention.

[0043] like Figure 2 As shown, the hydrogen path air tightness detection method comprises the following steps:

[0044] In step S201, the engine body hydrogen pipeline and the external hydrogen pipeline connection are checked.

[0045] In step S202, the proportional valve is closed by controlling the upper computer.

[0046] In step S203, the nitrogen inlet valve of the test environment is opened.

[0047] In step S204, nitrogen gas is charged at a pressure of P1 bar.

[0048] In step S205, the hydrogen concentration at the pipeline connection is measured using a handheld hydrogen concentration sensor.

[0049] In step S206, it is determined whether the hydrogen leakage concentration is less than the preset hydrogen leakage concentration B1. If the hydrogen leakage concentration is less than the preset hydrogen leakage concentration B1, step S307 is executed, otherwise, if the hydrogen leakage concentration is not less than the preset hydrogen leakage concentration B1, step S317 is executed.

[0050] In step S207, after the pressure is maintained for T1 seconds, the high-pressure pipeline pressure P2 is read.

[0051] In step S208, it is determined whether the pressure drop value is less than the preset pressure drop value A1. If the pressure drop value is less than the preset pressure drop value A1, step S309 is executed, otherwise, if the pressure drop value is not less than the preset pressure drop value A1, step S317 is executed.

[0052] In step S210, the nitrogen inlet valve of the test environment is opened.

[0053] In step S211, nitrogen gas is filled at a pressure of P3 bar.

[0054] In step S212, the hydrogen concentration at the pipeline connection is measured using a handheld hydrogen concentration sensor.

[0055] In step S213, it is determined whether the hydrogen leakage concentration is less than the preset hydrogen leakage concentration B2. If the hydrogen leakage concentration is less than the preset hydrogen leakage concentration B2, step S314 is executed; otherwise, if the hydrogen leakage concentration is not less than the preset hydrogen leakage concentration B2, step S318 is executed.

[0056] In step S214, after maintaining the pressure for T2 seconds, the medium-pressure pipeline pressure P4 is read.

[0057] In step S215, it is determined whether the pressure drop value is less than the preset pressure drop value A2. If the pressure drop value is less than the preset pressure drop value A2, step S316 is executed, otherwise, if the pressure drop value is not less than the preset pressure drop value A2, step S318 is executed.

[0058] In step S216, it is determined that the hydrogen supply subsystem meets the start-up conditions.

[0059] In step S217, close the laboratory air inlet valve and check the front-end pipeline connection of the proportional valve.

[0060] In step S218, close the laboratory air inlet valve and check the rear end pipeline connection of the proportional valve.

[0061] It should be noted that the preset hydrogen leakage concentration B1, the preset pressure drop value A1, the preset hydrogen leakage concentration B2, and the preset pressure drop value A2 can be freely set by the tester or obtained by computer simulation, and are not specifically limited here. P1 is the air tightness test input for the high-pressure section, and the pressure is relatively high. At this time, the pressure holding time T1 is relatively short. P3 is the low-pressure input pressure, and the pressure holding time is T2 at this time, and its response time increases. Among them, P1>P2, T1<T2. Depending on the design, P1P2 and T1T2 can be selected to shorten the pressure holding time and ensure that the test is more accurate and efficient. It is divided into air tightness detection at both ends of medium pressure and low pressure. When there is a gas leak, it can quickly locate whether the problem is in the medium pressure section or the low pressure section.

[0062] Furthermore, in one embodiment, the engine to be tested is subjected to an air tightness test and a coolant filling test, and an ion concentration and insulation resistance test is performed after the air tightness test and the coolant filling test are completed, and the test also includes: cleaning the thermal management subsystem components of the engine to be tested, and measuring the ion concentration of the coolant to be added after the cleaning is completed; if the ion concentration of the coolant to be added is less than the preset ion concentration, the coolant to be added is added to the main water channel and the auxiliary water channel, and the coolant pressure at the stack outlet is obtained after the filling is completed; if the coolant pressure at the stack outlet is greater than the preset pressure, the three-way valve of the engine to be tested is controlled to open, and the change value of the coolant pressure at the stack outlet within a third preset time period is obtained; if the change value of the coolant pressure at the stack outlet is less than the preset change threshold, the ion concentration of the coolant at the stack outlet is detected; if the ion concentration of the coolant at the stack outlet is less than the preset ion concentration, the insulation resistance of the engine to be tested is detected, and if the insulation resistance of the engine to be tested is greater than the preset resistance value, the ion concentration and insulation resistance test results are determined to be qualified.

[0063] Among them, the preset ion concentration, preset pressure, preset change threshold and preset resistance value can be set by relevant technicians according to experiments, or according to data obtained by computer simulation, and are not limited here.

[0064] It should be noted that the control method for air tightness detection of the thermal management subsystem of the specific embodiment of the present invention needs to ensure that the parts are clean parts after cleaning before the air tightness detection, and visually inspect the coolant to ensure that there are no physical impurities; before adding the coolant, the ion concentration is detected, and the pressure fluctuation is double-judged by measuring the outlet pressure of the stack and adjusting the three-way valve to ensure that the coolant filling is completed. There is no or only a small amount of gas in the pipeline. The air tightness detection method of the thermal management subsystem can quickly locate the cause of the problem when it occurs, and provide solutions in time. Before starting the engine, multiple detections and judgments are performed on the insulation resistance and pressure fluctuations to improve the first success rate of the fuel cell offline detection.

[0065] It should be understood that the ion concentration in the coolant has an important impact on the performance and life of the engine. In order to accurately measure the ion concentration in the coolant, professional testing instruments and methods are required, such as electrochemical detection methods, fluorescence detection methods, etc. Therefore, it is very necessary to detect the ion concentration of the engine coolant.

[0066] The following will be combined Figure 3 An insulation detection method of a fuel cell engine offline detection method according to a specific embodiment of the present invention is described in detail.

[0067] Figure 3 A flowchart of an insulation detection method provided by a specific embodiment of the present invention.

[0068] like Figure 3 As shown, the insulation detection method comprises the following steps:

[0069] In step S301, the engine thermal management subsystem components are cleaned and inspected.

[0070] In step S302, the engine body water pipeline and external water pipeline and component connections are checked.

[0071] In step S303, the host computer controls the high-pressure water pump and the low-pressure water pump to turn on.

[0072] In step S304, the ion concentration of the coolant is measured.

[0073] In step S305, it is determined whether the ion concentration is less than the preset ion concentration M1. If the ion concentration is less than the preset ion concentration M1, step S306 is executed. Otherwise, if the ion concentration is not less than the preset ion concentration M1, step S419 is executed.

[0074] In step S306, coolant is slowly added to the main water channel kettle and the auxiliary water channel kettle.

[0075] In step S307, the speed of the large water pump is set to R1, and the speed of the small water pump is set to R2.

[0076] In step S308, it is determined whether the kettle liquid level exceeds the mark position, if the kettle liquid level exceeds the mark position, step S309 is executed. Otherwise, if the kettle liquid level does not exceed the mark position, step S306 is executed.

[0077] In step S309, the stack coolant outlet pressure value S1 is obtained through the host computer.

[0078] In step S310, it is determined whether the obtained stack coolant outlet pressure value S1 is greater than the preset stack coolant outlet pressure value N1. If the stack coolant outlet pressure value S1 is greater than the preset stack coolant outlet pressure value N1, step S311 is executed. Otherwise, if the stack coolant outlet pressure value S1 is not greater than the preset stack coolant outlet pressure value N1, step S320 is executed.

[0079] In step S311, the host computer controls the three-way valve to open.

[0080] In step S312, the change value S2 of the inlet and outlet pressure of the stack coolant within 1 second is read.

[0081] In step S313, it is determined whether the stack coolant inlet and outlet pressure change value S2 within 1 second is less than the preset stack coolant inlet and outlet pressure change value N2 within 1 second. If the stack coolant inlet and outlet pressure change value S2 within 1 second is less than the preset stack coolant inlet and outlet pressure change value N2 within 1 second, step S314 is executed. Otherwise, if the stack coolant inlet and outlet pressure change value S2 within 1 second is not less than the preset stack coolant inlet and outlet pressure change value N2 within 1 second, step S320 is executed.

[0082] In step S314, the coolant ion concentration is measured.

[0083] In step S315, it is determined whether the ion concentration is less than the preset ion concentration M1, if the ion concentration is less than the preset ion concentration M1, step S316 is executed. Otherwise, if the ion concentration is not less than the preset ion concentration M1, step S321 is executed.

[0084] In step S316, the insulation resistance of the engine is measured.

[0085] In step S317, it is determined whether the engine insulation resistance is greater than the preset engine insulation resistance G. If the engine insulation resistance is greater than the preset engine insulation resistance G, step S318 is executed. Otherwise, if the engine insulation resistance is not greater than the preset engine insulation resistance G, step S322 is executed.

[0086] In step S318 , it is determined that the thermal management system meets the start-up conditions.

[0087] In step S319, the coolant is replaced with one that meets the ion concentration requirement, and step S306 is executed.

[0088] In step S320, check the bubbles in the thermal management subsystem and squeeze them out to eliminate them, and then execute step S306.

[0089] In step S321, the cause of engine ion precipitation is analyzed, and coolant is added again after the problem is resolved.

[0090] In step S322, the cause of the low insulation resistance of the engine is analyzed, and coolant is added again after the problem is resolved.

[0091] Among them, the preset ion concentration M1, the preset stack coolant outlet pressure value N1, the preset stack coolant inlet and outlet pressure change value N2 within 1 second and the preset engine insulation resistance G can all be set by relevant technical personnel based on experiments or based on data obtained by computer simulation, and are not specifically limited here.

[0092] In step S103, if the ion concentration and insulation resistance test results are qualified, the engine to be tested is operated, and an offline test result of the engine to be tested is obtained according to the running result of the engine to be tested.

[0093] Among them, in one embodiment, the engine to be tested is operated, and the offline test result of the engine to be tested is obtained according to the operation result of the engine to be tested, including: starting the engine to be tested, and loading the engine to be tested according to a preset loading strategy, and judging whether the engine to be tested reaches the target power; if the engine to be tested reaches the target power, the offline test result of the engine to be tested is determined to be qualified.

[0094] Among them, if the engine to be tested reaches the target power, the offline test result of the engine to be tested is determined to be qualified; if the engine to be tested does not reach the target power, the offline test result of the engine to be tested is determined to be unqualified. Then the host computer reads the specific fault of the engine and analyzes the cause. After solving the problem, it tries to restart the engine. Finally, the test results are printed or uploaded to the display of the testing equipment to complete the offline test of the engine.

[0095] It should be noted that the target power of the above-mentioned engine can be set to any power of the engine in the range from idle to rated power, and the preset loading strategy can be freely set by the tester or obtained by computer simulation, which is not specifically limited here.

[0096] Therefore, a systematic and modular method can be provided for the off-line detection of fuel cell engines, the off-line detection results of fuel cell engines can be obtained, the success rate of off-line detection of fuel cell engines can be improved, the troubleshooting time can be reduced, and the manpower and material costs can be greatly reduced.

[0097] Furthermore, in one embodiment, before performing air tightness testing and coolant filling testing on the engine to be tested, it also includes: flashing the fuel cell engine controller of the engine to be tested; if the flashing of the fuel cell engine controller is completed, then detecting the communication status of at least one sensor and multiple actuators of the engine to be tested.

[0098] Optionally, the fuel cell engine controller of the engine to be tested can write the optimized data into the controller through a specific read-write tool, and then verify the communication status. Among them, the communication status is related to the efficiency of system monitoring, fault diagnosis and feedback control. Specifically, the host computer needs to detect whether the communication status of the engine sensor, low-voltage actuator and high-voltage actuator is kept unobstructed, so as to detect the engine operation status in real time and ensure that the controller can work normally.

[0099] In order to enable those skilled in the art to better understand the fuel cell engine offline detection method according to the embodiment of the present invention, the fuel cell engine offline detection method according to the embodiment of the present invention will be described in detail below in conjunction with specific embodiments.

[0100] Figure 4 A flowchart of a fuel cell engine offline detection method provided in a specific embodiment of the present invention.

[0101] like Figure 4 As shown, the fuel cell engine offline detection method includes the following steps:

[0102] In step S401, the fuel cell engine controller communication is operated. First, the host computer flashes the fuel cell engine controller, and then the host computer checks the sensor, the low-voltage actuator and the high-voltage actuator simultaneously.

[0103] In step S402, the fuel cell engine is connected to pipelines by first checking the engine pipeline connection, and then simultaneously connecting the engine external hydrogen supply pipeline, the main water pipeline, and the auxiliary water pipeline.

[0104] In step S403, the fuel cell engine is subjected to air tightness test, coolant filling and test. First, the high-pressure end of the hydrogen circuit is tested for air tightness, and then the low-pressure end of the hydrogen circuit is tested for air tightness. Then, the main water circuit and the auxiliary water circuit are filled with coolant. After completion, the ion concentration and insulation resistance test are performed.

[0105] In step S404, the fuel cell engine is tested. First, the target power is set, and then the fuel cell engine is loaded step by step to determine whether the engine has reached the target power. If it has, it is finished. If it has not reached the target power, the host computer reads the engine fault, analyzes the cause of the fault, and tries to restart the fuel cell engine after solving it.

[0106] Among them, the operation of the fuel cell engine controller communication should be carried out in parallel with the pipeline connection, air tightness detection, coolant filling and detection, and engine operation steps. Pipeline connection, air tightness detection, coolant filling and detection, and engine operation should be performed in sequence. It should be noted that the above explanation of the fuel cell engine offline detection method embodiment is also applicable to the fuel cell engine offline detection method of this specific embodiment, and will not be repeated here.

[0107] The fuel cell engine offline detection method provided in an embodiment of the present invention can provide a systematic and modular method for fuel cell engine offline detection. The method obtains the fuel cell engine offline detection result through engine air tightness detection, coolant detection, ion concentration detection and insulation resistance detection, thereby improving the success rate of fuel cell engine offline detection, reducing the troubleshooting time, and greatly reducing manpower and material costs.

[0108] In addition, an embodiment of the present invention also provides a fuel cell engine offline detection device.

[0109] Figure 5 It is a block diagram of a fuel cell engine offline detection device according to an embodiment of the present invention.

[0110] like Figure 5 As shown, the fuel cell engine offline detection device 10 includes: a first detection module 100 , a second detection module 200 and a third detection module 300 .

[0111] Among them, the first detection module 100 is used to detect the current pipeline connection status of the engine to be detected; the second detection module 200 is used to perform air tightness detection and coolant filling detection on the engine to be detected when the current pipeline connection status is a qualified state, and perform ion concentration and insulation resistance detection after completing the air tightness detection and coolant filling detection; the third detection module 300 is used to operate the engine to be detected when the ion concentration and insulation resistance test results are qualified, and obtain the offline detection results of the engine to be detected based on the operation results of the engine to be detected.

[0112] Furthermore, in one embodiment, before performing air tightness test and coolant filling test on the engine to be tested, the first detection module 100 is also used to: flash the fuel cell engine controller of the engine to be tested; if the flashing of the fuel cell engine controller is completed, then detect the communication status of at least one sensor and multiple actuators of the engine to be tested.

[0113] Further, in one embodiment, the first detection module 100 is specifically used to: detect the engine pipeline connection status of the engine to be detected; if the engine pipeline connection status is a connected state, then detect the external hydrogen supply pipeline connection status, the main water pipeline connection status and the auxiliary water pipeline connection status of the engine to be detected; if the external hydrogen supply pipeline connection status, the main water pipeline connection status and the auxiliary water pipeline connection status are all in a connected state, then determine that the current pipeline connection state is a qualified state.

[0114] Further, in one embodiment, the second detection module 200 is specifically used to: based on the first pressure value, inflate to the first pressure section of the hydrogen circuit, and detect the hydrogen concentration at the first pipeline connection; if the hydrogen concentration at the first pipeline connection is less than the first preset concentration, then manually obtain the first pressure drop value of the first pressure section of the hydrogen circuit within a first preset time period; if the first pressure drop value is less than the first preset threshold value, then based on the second pressure value, inflate to the second pressure section of the hydrogen circuit, and detect the hydrogen concentration at the second pipeline connection; if the hydrogen concentration at the second pipeline connection is less than the second preset concentration, then manually obtain the second pressure drop value of the second pressure section of the hydrogen circuit within a second preset time period; if the second pressure drop value is less than the second preset threshold value, it is determined that the air tightness test result of the engine to be tested is qualified.

[0115] Furthermore, in one embodiment, the second detection module 200 is also used to: clean the thermal management subsystem components of the engine to be tested, and measure the ion concentration of the coolant to be added after the cleaning is completed; if the ion concentration of the coolant to be added is less than the preset ion concentration, add the coolant to be added to the main water channel and the auxiliary water channel, and obtain the coolant pressure at the stack outlet after the filling is completed; if the coolant pressure at the stack outlet is greater than the preset pressure, control the three-way valve of the engine to be tested to open, and obtain the change value of the coolant pressure at the stack outlet within a third preset time period; if the change value of the coolant pressure at the stack outlet is less than the preset change threshold, detect the ion concentration of the coolant at the stack outlet; if the ion concentration of the coolant at the stack outlet is less than the preset ion concentration, detect the insulation resistance of the engine to be tested, and if the insulation resistance of the engine to be tested is greater than the preset resistance, determine that the ion concentration and insulation resistance test results are qualified.

[0116] Furthermore, in one embodiment, the third detection module 300 is specifically used to: start the engine to be detected, load the engine to be detected according to a preset loading strategy, and determine whether the engine to be detected reaches the target power; if the engine to be detected reaches the target power, the offline detection result of the engine to be detected is determined to be qualified.

[0117] It should be noted that the above explanations of the fuel cell engine offline detection method embodiment are also applicable to the fuel cell engine offline detection device of this embodiment, and will not be elaborated here.

[0118] The fuel cell engine offline detection device provided in an embodiment of the present invention can provide a systematic and modular method for fuel cell engine offline detection through the above-mentioned fuel cell engine offline detection method. The fuel cell engine offline detection result is obtained by performing engine air tightness detection, coolant detection, ion concentration detection and insulation resistance detection, thereby improving the success rate of fuel cell engine offline detection, reducing the troubleshooting time, and greatly reducing manpower and material costs.

[0119] In addition, if Figure 6 As shown, an embodiment of the present invention further provides an electronic device.

[0120] Figure 6 A schematic block diagram of an electronic device provided in an embodiment of the present invention. The electronic device may include:

[0121] A memory 601 , a processor 602 , and a computer program stored in the memory 601 and executable on the processor 602 .

[0122] When the processor 602 executes the program, the fuel cell engine offline detection method provided in the above embodiment is implemented.

[0123] Furthermore, the electronic device further comprises:

[0124] The communication interface 603 is used for communication between the memory 601 and the processor 602 .

[0125] The memory 601 is used to store computer programs that can be executed on the processor 602 .

[0126] The memory 601 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0127] If the memory 601, the processor 602 and the communication interface 603 are implemented independently, the communication interface 603, the memory 601 and the processor 602 can be connected to each other through a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 6Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0128] Optionally, in a specific implementation, if the memory 601, the processor 602 and the communication interface 603 are integrated on a chip, the memory 601, the processor 602 and the communication interface 603 can communicate with each other through an internal interface.

[0129] The processor 602 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0130] In addition, an embodiment of the present invention further provides a storage medium on which a computer program is stored. When the program is executed by a processor, the above-mentioned fuel cell engine offline detection method is implemented.

[0131] In addition, an embodiment of the present invention further provides a computer program product, including a computer program, which is executed to implement any of the above-mentioned fuel cell engine offline detection methods.

[0132] 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 N 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.

[0133] 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "N" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0134] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0135] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0136] A person skilled in the art may understand that all or part of the steps in the above-mentioned embodiment method may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

Claims

1. A fuel cell engine offline detection method, characterized in that: The following steps are involved: Detecting the current pipeline connection status of the engine to be detected; If the current pipeline connection state is a qualified state, an air tightness test and a coolant filling test are performed on the engine to be tested, and after completing the air tightness test and the coolant filling test, an ion concentration and insulation resistance test are performed; If the ion concentration and insulation resistance test results are qualified, the engine to be tested is operated, and an off-line test result of the engine to be tested is obtained according to the operating result of the engine to be tested.

2. The method according to claim 1, characterized in that Before performing the air tightness test and the coolant filling test on the engine to be tested, the method further includes: Flashing the fuel cell engine controller of the engine to be tested; If the flashing of the fuel cell engine controller is completed, the communication status of at least one sensor and multiple actuators of the engine to be detected is detected.

3. The method according to claim 1, characterized in that The detecting of the current pipeline connection state of the engine to be detected includes: Detecting the engine pipeline connection status of the engine to be detected; If the engine pipeline connection state is in the connected state, then detecting the external hydrogen supply pipeline connection state, the main water pipeline connection state and the auxiliary water pipeline connection state of the engine to be detected; If the external hydrogen supply pipeline connection state, the main water pipeline connection state and the auxiliary water pipeline connection state are all in the connected state, the current pipeline connection state is determined to be the qualified state.

4. The method according to claim 1, characterized in that: The air tightness test and coolant filling test are performed on the engine to be tested, and after completing the air tightness test and the coolant filling test, ion concentration and insulation resistance test are performed, including: Based on the first pressure value, filling to a first pressure section of the hydrogen path, and detecting the hydrogen concentration at the connection of the first pipeline; If the hydrogen concentration at the connection point of the first pipeline is less than a first preset concentration, obtaining a first pressure drop value of the first pressure section of the hydrogen path within a first preset time period; If the first pressure drop value is less than a first preset threshold value, then based on the second pressure value, the hydrogen circuit is inflated to a second pressure section, and the hydrogen concentration at the second pipeline connection is detected; If the hydrogen concentration at the second pipeline connection is less than a second preset concentration, obtaining a second pressure drop value of the second pressure section of the hydrogen path at a second preset time; If the second pressure drop value is less than a second preset threshold, it is determined that the air tightness test result of the engine to be tested is qualified.

5. The method according to claim 1, characterized in that The method of performing air tightness test and coolant filling test on the engine to be tested, and performing ion concentration and insulation resistance test after completing the air tightness test and the coolant filling test, further includes: Cleaning the thermal management subsystem components of the engine to be tested, and measuring the ion concentration of the coolant to be added after the cleaning is completed; If the ion concentration of the coolant to be added is less than the preset ion concentration, the coolant to be added is added to the main water channel and the auxiliary water channel, and the coolant pressure at the stack outlet is obtained after the filling is completed; If the coolant pressure at the stack outlet is greater than the preset pressure, the three-way valve of the engine to be tested is controlled to open, and a change value of the coolant pressure at the stack outlet within a third preset time period is obtained; If the change value of the coolant pressure at the stack outlet is less than a preset change threshold, detecting the ion concentration of the coolant at the stack outlet; If the ion concentration of the coolant at the stack outlet is less than the preset ion concentration, the insulation resistance of the engine to be tested is tested; if the insulation resistance of the engine to be tested is greater than the preset resistance value, the ion concentration and insulation resistance test results are determined to be qualified.

6. The method according to claim 1, characterized in that The operating the engine to be detected and obtaining an offline detection result of the engine to be detected according to the operating result of the engine to be detected includes: Starting the engine to be tested, loading the engine to be tested according to a preset loading strategy, and determining whether the engine to be tested reaches a target power; If the engine to be tested reaches the target power, the off-line test result of the engine to be tested is determined to be qualified.

7. A fuel cell engine offline detection device, characterized in that: include: A first detection module, used to detect the current pipeline connection state of the engine to be detected; A second detection module is used to perform an air tightness test and a coolant filling test on the engine to be tested when the current pipeline connection state is a qualified state, and perform an ion concentration and insulation resistance test after completing the air tightness test and the coolant filling test; The third detection module is used to operate the engine to be detected when the ion concentration and insulation resistance detection results are qualified, and obtain the offline detection result of the engine to be detected according to the operation result of the engine to be detected.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the fuel cell engine offline detection method as claimed in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the fuel cell engine offline detection method as described in any one of claims 1 to 6 is implemented.

10. A computer program product, comprising a computer program, characterized in that The computer program is executed to implement the fuel cell engine offline detection method according to any one of claims 1 to 6.

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