Coolant leakage detection method and related apparatus

Abstract

The application discloses a cooling liquid leakage detection method and related equipment, and relates to the field of vehicle safety detection, and mainly aims to solve the problem that there is currently a lack of a better method for detecting cooling liquid leakage. The method comprises the following steps: acquiring the volume change rate of antifreeze of an expansion tank, the amount change rate of gaseous substances and the hydrogen concentration; detecting the rotating speed data of a water pump of a cooling system where the expansion tank is located, wherein the rotating speed data is used for feeding back the stable state of the water pump; and under the condition that the state of the water pump is stable, determining the leakage condition of the cooling liquid based on the volume change rate of the antifreeze, the amount change rate of the gaseous substances and the hydrogen concentration. The application is used for the cooling liquid leakage detection process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle safety detection, and in particular to a coolant leakage detection method and related equipment. BACKGROUND

[0002] The heat dissipation system of the fuel cell system belongs to a closed heat dissipation system, and whether the antifreeze can normally circulate in the cooling circuit is a necessary guarantee for the normal operation of the stack. During the operation of the fuel cell vehicle, due to the poor sealing of the membrane electrode of the stack or other reasons, antifreeze leakage occurs, as follows: antifreeze leaks into the hydrogen flow channel or the antifreeze leaks into the air flow channel; the external pipeline of the stack is damaged, the clamp joint is loose, and the antifreeze leaks outside the stack.

[0003] The stack of the fuel cell system is formed by a membrane electrode, a bipolar plate, and a membrane electrode stack. One side of the bipolar plate is a hydrogen flow channel, and the other side is an air flow channel. An antifreeze flow channel is formed in the middle of the bipolar plate, and different medium flow channels are sealed by a sealing material. During the use of the fuel cell system, due to the poor working conditions of the vehicle, improper use, and other reasons, the sealing of the fuel cell system fails, which affects the cross leakage between hydrogen, oxygen (air), and antifreeze, and affects the performance and service life of the stack. The vibration of the vehicle also causes the clamp joint of the external cooling system pipeline to loosen, causing the antifreeze to leak outside. At present, the recognition of antifreeze leakage of the fuel cell system is relatively slow, and the system is often checked for faults after the fuel cell system fails. At this time, the fuel cell system has already been irreversibly damaged and dangerous, and the maintenance cost is huge. At present, there is still a lack of a better method for detecting the leakage of the coolant. SUMMARY

[0004] In view of the above problems, the present application provides a coolant leakage detection method and related equipment, the main purpose of which is to solve the problem that there is currently a lack of a better method for detecting the leakage of the coolant.

[0005] To solve at least one of the above technical problems, in a first aspect, the present application provides a coolant leakage detection method, which comprises:

[0006] Obtaining the antifreeze volume change rate of the expansion tank, the amount change rate of the gas substance, and the hydrogen concentration;

[0007] Detecting the rotation speed data of the water pump of the cooling system in which the expansion tank is located, wherein the rotation speed data is used to feedback the stable state of the water pump;

[0008] Under the condition that the state of the water pump is stable, determining the leakage condition of the coolant based on the antifreeze volume change rate, the amount change rate of the gas substance, and the hydrogen concentration.

[0009] Optionally, the obtaining the anti-freezing liquid volume change rate, the gas substance amount change rate and the hydrogen concentration of the expansion water tank comprises:

[0010] constructing a standard relation graph between the liquid level height and the anti-freezing liquid volume of the expansion water tank;

[0011] determining the anti-freezing liquid volume change rate based on the real-time liquid level height of the expansion water tank and the standard relation graph.

[0012] Optionally, the obtaining the anti-freezing liquid volume change rate, the gas substance amount change rate and the hydrogen concentration of the expansion water tank comprises:

[0013] obtaining the real-time gas volume, the gas temperature and the gas pressure of the expansion water tank;

[0014] obtaining the gas substance amount change rate of the expansion water tank.

[0015] Optionally, the obtaining the anti-freezing liquid volume change rate, the gas substance amount change rate and the hydrogen concentration of the expansion water tank comprises:

[0016] obtaining a comparison result of the gas pressure of the expansion water tank and a preset value;

[0017] in a case where the comparison result reflects that the gas pressure is greater than the preset value, detecting the hydrogen concentration of the gas based on a detection device.

[0018] Optionally, the determining the leakage of the cooling liquid based on the anti-freezing liquid volume change rate, the gas substance amount change rate and the hydrogen concentration in the case where the water pump is stable comprises:

[0019] in a case where the anti-freezing liquid volume change rate is greater than a first threshold value and gradually increases,

[0020] and the gas substance amount change rate is greater than a second threshold value and gradually increases,

[0021] and the hydrogen concentration is greater than or equal to a third threshold value, determining that the anti-freezing liquid leaks into the hydrogen flow channel of the stack.

[0022] Optionally, the determining the leakage of the cooling liquid based on the anti-freezing liquid volume change rate, the gas substance amount change rate and the hydrogen concentration in the case where the water pump is stable comprises:

[0023] in a case where the anti-freezing liquid volume change rate is greater than a first threshold value and gradually increases,

[0024] and the gas substance amount change rate is greater than a second threshold value and gradually increases,

[0025] and the hydrogen concentration is less than a third threshold value, it is determined that the anti-freezing liquid leaks into the air flow channel of the electric pile.

[0026] Optionally, based on the anti-freezing liquid volume change rate, the gas substance amount change rate and the hydrogen concentration, the leakage of the cooling liquid is determined when the water pump is stable, including:

[0027] when the anti-freezing liquid volume change rate is greater than a first threshold value and gradually increases,

[0028] when the gas substance amount change rate is less than or equal to a second threshold value and is not easy to fluctuate, and

[0029] when the hydrogen concentration is less than a third threshold value, it is determined that the anti-freezing liquid leaks out.

[0030] In a second aspect, an embodiment of the present application further provides a cooling liquid leakage detection device, including:

[0031] an acquisition unit configured to acquire an anti-freezing liquid volume change rate of an expansion tank, a gas substance amount change rate and a hydrogen concentration;

[0032] a detection unit configured to detect a rotating speed data of a water pump of a cooling system in which the expansion tank is located, wherein the rotating speed data is used to feed back a stable state of the water pump;

[0033] a determination unit configured to determine a leakage of the cooling liquid based on the anti-freezing liquid volume change rate, the gas substance amount change rate and the hydrogen concentration when the water pump is stable.

[0034] In order to achieve the above-mentioned purpose, according to a third aspect of the present application, a computer readable storage medium is provided, which includes a stored program, wherein the above-mentioned steps of the cooling liquid leakage detection method are implemented when the above-mentioned program is executed by a processor.

[0035] In order to achieve the above-mentioned purpose, according to a fourth aspect of the present application, an electronic device is provided, which includes at least one processor and at least one memory connected with the processor; wherein the above-mentioned processor is used to call program instructions in the above-mentioned memory, and execute the steps of the above-mentioned cooling liquid leakage detection method.

[0036] By the technical scheme, the cooling liquid leakage detection method and related equipment provided by the application can solve the problem that there is no better method for detecting the leakage of cooling liquid, and the volume change rate of antifreeze, the amount change rate of gas substance and the hydrogen concentration of the expansion tank are obtained, the rotation speed data of the water pump of the cooling system where the expansion tank is located is detected, the rotation speed data is used to feed back the stable state of the water pump, and the leakage of the cooling liquid is determined based on the volume change rate of antifreeze, the amount change rate of gas substance and the hydrogen concentration when the water pump is stable. In the above scheme, the cooling circuit is monitored in real time, the amount change of gas substance in the expansion tank, the change of gas composition and the volume change of antifreeze are analyzed, the leakage reason is further analyzed, the antifreeze leaks into the hydrogen flow channel or the antifreeze leaks into the air flow channel, the pipe outside the electric pile is damaged, the clamp interface is loose, and the antifreeze leaks outside the electric pile. The fault analysis result is fed back to the after-sales personnel, and the after-sales processing is facilitated.

[0037] Correspondingly, the cooling liquid leakage detection device, equipment and computer readable storage medium provided by the embodiment of the application also have the above technical effects.

[0038] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0039] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered limiting the application. Moreover, the same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0040] Figure 1 A flowchart of a cooling liquid leakage detection method provided by an embodiment of the application is shown;

[0041] Figure 2 A structure schematic diagram of a cooling liquid leakage detection device provided by an embodiment of the application is shown;

[0042] Figure 3 A structure schematic diagram of a cooling liquid leakage detection device provided by an embodiment of the application is shown;

[0043] Figure 4 A composition schematic block diagram of a cooling liquid leakage detection device provided by an embodiment of the application is shown;

[0044] Figure 5A component schematic block diagram of the cooling liquid leakage detection electronic device provided by the embodiment of the present application is shown;

[0045] Wherein, the water tank water inlet 01, the temperature and pressure integrated sensor 02, the electronic discharge valve 03, the hydrogen concentration sensor 04, the gas detection chamber 05, the discharge port 06, the antifreeze outlet 07, the liquid level sensor 08, the backwater port 09, and the pipeline 10. DETAILED DESCRIPTION

[0046] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thoroughly and completely understood, and one skilled in the art will be able to fully convey the scope of the present application to others skilled in the art.

[0047] In order to solve the problem that there is currently no better method for detecting cooling liquid leakage,

[0048] The embodiment of the present application provides a cooling liquid leakage detection device, i.e., the expansion tank as described above, which is shown in Figures 2-3 as shown in

[0049] The expansion tank integrates the temperature and pressure integrated sensor 02, the electronic discharge valve 03, the hydrogen concentration sensor 04, and the liquid level sensor 08, and the specific structure is shown in Figure 2 01 is the water tank water inlet, 02 is the temperature and pressure integrated sensor: for detecting the temperature and pressure of the gas above the expansion tank; 03 is the electronic discharge valve, for controlling the pressure of the gas above the expansion tank; 04 is the hydrogen concentration sensor, for detecting whether there is hydrogen leakage; 05 is the gas detection chamber, which is composed of multiple partitions, as the discharged gas contains a certain amount of moisture, the partitions cause a certain separation of the gas, the gas is discharged from 04, and the liquid can be discharged from 06; 06 is the discharge port; 07 is the antifreeze outlet; 08 is the liquid level sensor, for detecting the liquid level; 09 is the backwater port, which can be composed of one or more. The above Figure 3 The hydrogen concentration sensor 04, the gas detection chamber 05, and the discharge port 06 are separated from the water tank, and a pipeline is used for connection therebetween.

[0050] Further, the embodiment of the present application provides a cooling liquid leakage detection method, as shown in Figure 1 The method comprises the following steps:

[0051] S101, obtaining the antifreeze volume change rate of the expansion tank, the gas material change rate, and the hydrogen concentration;

[0052] The step S101 further comprises S1011, S1012, and S1013:

[0053] S1011, constructing a standard relationship diagram between the liquid level height of the expansion water tank and the antifreeze volume;

[0054] Based on the real-time liquid level height of the expansion water tank and the standard relationship diagram, the antifreeze volume change rate is determined.

[0055] Exemplarily, the application first calibrates the expansion space of the above-mentioned expansion water tank, obtains the V liquid-H relationship diagram of the liquid level height and the antifreeze volume under the calibration condition, that is, the standard relationship diagram between the above-mentioned liquid level height and the antifreeze volume, and stores the data in the FCU (Fuel Cell Controller, fuel cell controller). The FCU plays an important role in the fuel cell vehicle. The FCU is responsible for monitoring, coordinating and optimizing the fuel cell system to ensure the safe and efficient operation of the vehicle.

[0056] Further, the application monitors the liquid level height in the water tank in real time based on the liquid level sensor 08 and transmits it to the FCU.

[0057] Based on the above-mentioned scheme, the FCU converts the received liquid level sensor liquid level signal into the real-time liquid level height in the expansion water tank, compares it with the standard relationship diagram between the above-mentioned liquid level height and the antifreeze volume, and determines the antifreeze volume V 液1 ……V 液n , V 液n+1 , V 液 change rate a:

[0058] a = | (V 液n+1 -V 液n ) / V 液n | * 100%

[0059] S1012, obtaining the real-time gas volume, gas temperature and gas pressure of the expansion water tank;

[0060] Obtaining the amount change rate of the gas substance of the expansion water tank.

[0061] Further, based on the difference between the total volume of the water tank and the total volume of the liquid, the gas volume V 气 in the expansion water tank is obtained.

[0062] V 气 = V 水箱 -V 液

[0063] The temperature T 气 and pressure P 气 of the gas in the expansion water tank are detected in real time by the temperature and pressure integrated sensor 02 and the signals are transmitted to the FCU.

[0064] Based on the above scheme, considering that when the water pump speed is stable, the flow rate of the water in and out of the expansion tank is basically stable, the gas in the internal is in a closed space, and the amount of substance of the gas is stable during normal operation, so according to the ideal gas state equation, the amount of substance of the gas in the closed space is stable.

[0065] P 气 *V 气 / (R*T 气 )=N

[0066] The above R represents the molar gas constant, and N represents the amount of substance of the gas.

[0067] Therefore, the application obtains the gas substance change rate b n :

[0068] b n =|(N n+1 -N n ) / N n |*100%

[0069] S1013, obtain the comparison result of the gas pressure of the expansion tank and the preset value;

[0070] In the case where the comparison result reflects that the gas pressure is greater than the preset value, the hydrogen concentration of the gas is detected based on the detection device.

[0071] For example, when the FCU detects that the gas pressure in the expansion tank is greater than the set value, the electronic exhaust valve 03 is started, the gas enters the gas detection chamber 05, the gas passes through the partition plate, is discharged into the air through the hydrogen concentration sensor 04, and the liquid can be discharged from the 06 discharge port. When the gas passes through the 04 hydrogen concentration sensor, whether it contains hydrogen and the hydrogen concentration can be detected, and the signal of the hydrogen concentration is transmitted to the FCU.

[0072] It can be understood that the above-mentioned preset value is determined according to the specific situation, which is not limited here.

[0073] S102, detect the speed data of the water pump of the cooling system where the expansion tank is located, wherein the speed data is used to feed back the stable state of the water pump;

[0074] For example, when the FCU detects that the speed of the water pump meets the preset speed interval, it is determined that the water pump of the expansion tank is stable, and in this case, the signals of the temperature and pressure integrated sensor 02, the hydrogen concentration sensor 04 and the liquid level sensor 08 can be analyzed in the analysis mode, as follows.

[0075] It can be understood that the above-mentioned preset speed interval is determined according to the specific situation, which is not limited here.

[0076] S103, in the case that the water pump state is stable, determining a leakage condition of the coolant based on the anti-freezing liquid volume change rate, the gas substance amount change rate, and the hydrogen concentration.

[0077] The step S103 further comprises S1031, S1032, and S1033:

[0078] S1031, in the case that the anti-freezing liquid volume change rate is greater than a first threshold value and gradually increases,

[0079] the gas substance amount change rate is greater than a second threshold value and gradually increases,

[0080] and the hydrogen concentration is greater than or equal to a third threshold value, determining that the anti-freezing liquid leaks into the hydrogen flow channel of the fuel cell stack.

[0081] S1032, in the case that the anti-freezing liquid volume change rate is greater than a first threshold value and gradually increases,

[0082] the gas substance amount change rate is greater than a second threshold value and gradually increases,

[0083] and the hydrogen concentration is less than a third threshold value, determining that the anti-freezing liquid leaks into the air flow channel of the fuel cell stack.

[0084] S1033, in the case that the anti-freezing liquid volume change rate is greater than a first threshold value and gradually increases,

[0085] the gas substance amount change rate is less than or equal to a second threshold value and is not easy to fluctuate,

[0086] and the hydrogen concentration is less than a third threshold value, determining that the anti-freezing liquid leaks out.

[0087] The threshold values are determined according to specific conditions and are not limited herein.

[0088] Specifically, as shown in Table 1 below:

[0089] Table 1

[0090]

[0091]

[0092] Based on the above scheme, according to the analysis result, when there is a fault, the FCU closes the fuel cell system, and feeds back the fuel cell system fault to the after-sales platform for processing.

[0093] By the technical scheme, the cooling liquid leakage detection method provided by the application can solve the problem that there is currently no better method for detecting the leakage of cooling liquid, and the volume change rate of the anti-freezing liquid, the amount change rate of the gas substance and the hydrogen concentration of the expansion tank are acquired, the rotating speed data of the water pump of the cooling system in which the expansion tank is located is detected, the rotating speed data is used for feeding back the stable state of the water pump, the leakage of the cooling liquid is determined based on the volume change rate of the anti-freezing liquid, the amount change rate of the gas substance and the hydrogen concentration when the water pump is in a stable state. In the above scheme, the cooling circuit is monitored in real time, the amount change of the gas substance in the expansion tank, the change of the gas composition and the volume change of the anti-freezing liquid are analyzed, the leakage reason is further analyzed, the anti-freezing liquid leaks into the hydrogen flow channel or the anti-freezing liquid leaks into the air flow channel, the pipe outside the electric pile is damaged, the clamp interface is loose, and the anti-freezing liquid leaks outside the electric pile. The fault analysis result is fed back to the after-sales personnel, and the after-sales processing is facilitated.

[0094] Further, as an implementation of the method shown in the above Figure 1 , the embodiment of the application further provides a cooling liquid leakage detection device for implementing the method shown in the above Figure 1 . The device embodiment corresponds to the foregoing method embodiment, and for the convenience of reading, the details in the foregoing method embodiment will not be described one by one, but it should be clear that the device in the embodiment can correspondingly implement all the contents in the foregoing method embodiment. As shown in the above Figure 4 , the device comprises an acquisition unit 21, a detection unit 22 and a determination unit 23, wherein

[0095] The acquisition unit 21 is configured to acquire the volume change rate of the anti-freezing liquid, the amount change rate of the gas substance and the hydrogen concentration of the expansion tank.

[0096] The detection unit 22 is configured to detect the rotating speed data of the water pump of the cooling system in which the expansion tank is located, wherein the rotating speed data is used for feeding back the stable state of the water pump.

[0097] The determination unit 23 is configured to determine the leakage of the cooling liquid based on the volume change rate of the anti-freezing liquid, the amount change rate of the gas substance and the hydrogen concentration when the water pump is in a stable state.

[0098] The processor comprises a core, and the core retrieves the corresponding program unit from the memory. The core can be set to one or more, and a cooling liquid leakage detection method can be implemented by adjusting the core parameters, which can solve the problem that there is currently no better method for detecting the leakage of cooling liquid.

[0099] The embodiment of the present application provides a computer readable storage medium, the computer readable storage medium comprises a stored program, the program is executed by a processor to realize the cooling liquid leakage detection method.

[0100] The embodiment of the present application provides a processor, the processor is used for running a program, wherein the program is executed to perform the cooling liquid leakage detection method.

[0101] The embodiment of the present application provides an electronic device, the electronic device comprises at least one processor and at least one memory connected with the processor, wherein the processor is used for calling program instructions in the memory to execute the cooling liquid leakage detection method.

[0102] The embodiment of the present application provides an electronic device 30, as shown in the figure, the electronic device comprises at least one processor 301 and at least one memory 302 connected with the processor, and a bus 303, wherein the processor 301 and the memory 302 complete mutual communication through the bus 303, and the processor 301 is used for calling program instructions in the memory to execute the cooling liquid leakage detection method. Figure 5

[0103] The intelligent electronic device in the present application can be a PC, a PAD, a mobile phone and the like.

[0104] The present application also provides a computer program product, when being executed on a process management electronic device, is suitable for executing the program initialized with the steps of the cooling liquid leakage detection method.

[0105] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0106] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system or a computer program product. Therefore, the present application can adopt a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can adopt a computer program product in the form of one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program codes.

[0107] ​The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flow or blocks. Figure 1 one or more flow or blocks.

[0108] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks. Figure 1 one or more flow or blocks. Figure 1 one or more flow or blocks.

[0109] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flow or blocks. Figure 1 one or more flow or blocks.

[0110] The embodiments of the present application also provide a computer program product, which comprises computer software instructions, when the computer software instructions are executed on a processing device, cause the processing device to perform the steps as Figure 1 the flow of the control of the memory in the corresponding embodiments.

[0111] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that the computer can store or be integrated into a data storage device such as a server, data center, etc. containing one or more available media. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)) and the like.

[0112] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0113] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0114] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0115] In addition, each of the functional units in the various embodiments of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0116] When the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in part, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the various embodiments of the method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, and various other media that can store program codes.

[0117] The above, the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A method for detecting coolant leakage, characterized in that, include: Obtain the rate of change of antifreeze volume, the rate of change of gaseous substances, and the hydrogen concentration in the expansion tank; The rotational speed data of the water pump in the cooling system where the expansion tank is located is detected, wherein the rotational speed data is used to provide feedback on the stable state of the water pump; When the water pump is in a stable state, the leakage of the coolant is determined based on the antifreeze volume change rate, the gaseous substance amount change rate, and the hydrogen concentration. When the water pump is in a stable state, determining the leakage status of the coolant based on the antifreeze volume change rate, the gaseous substance quantity change rate, and the hydrogen concentration includes: When the rate of change of antifreeze volume exceeds a first threshold and shows a gradually increasing trend. Furthermore, the rate of change of the amount of gaseous substance is greater than the second threshold and shows a gradually increasing trend. If the hydrogen concentration is greater than or equal to the third threshold, it is determined that the antifreeze has leaked into the hydrogen flow channel of the fuel cell stack. When the water pump is in a stable state, determining the leakage status of the coolant based on the antifreeze volume change rate, the gaseous substance quantity change rate, and the hydrogen concentration includes: When the rate of change of antifreeze volume exceeds a first threshold and shows a gradually increasing trend. Furthermore, the rate of change of the amount of gaseous substance is greater than the second threshold and shows a gradually increasing trend. If the hydrogen concentration is less than the third threshold, it is determined that the antifreeze has leaked into the fuel cell stack airflow channel. When the water pump is in a stable state, determining the leakage status of the coolant based on the antifreeze volume change rate, the gaseous substance quantity change rate, and the hydrogen concentration includes: When the rate of change of antifreeze volume exceeds a first threshold and shows a gradually increasing trend. Furthermore, the rate of change of the amount of the gaseous substance is less than or equal to the second threshold, exhibiting a state that is not easily fluctuated. If the hydrogen concentration is less than the third threshold, it is determined that the antifreeze is leaking.

2. The method according to claim 1, characterized in that, The acquisition of the antifreeze volume change rate, gaseous substance quantity change rate, and hydrogen concentration in the expansion tank includes: Construct a standard diagram showing the relationship between the liquid level in the expansion tank and the volume of antifreeze; The antifreeze volume change rate is determined based on the real-time liquid level in the expansion tank and the standard relationship diagram.

3. The method according to claim 1, characterized in that, The acquisition of the antifreeze volume change rate, gaseous substance quantity change rate, and hydrogen concentration in the expansion tank includes: Obtain the real-time gas volume, gas temperature, and gas pressure of the expansion tank; Obtain the rate of change of gaseous substances in the expansion tank.

4. The method according to claim 1, characterized in that, The acquisition of the antifreeze volume change rate, gaseous substance quantity change rate, and hydrogen concentration in the expansion tank includes: Obtain the comparison result between the gas pressure in the expansion tank and the preset value; If the comparison results indicate that the gas pressure is greater than the preset value, the hydrogen concentration of the gas is detected using a detection device.

5. A coolant leakage detection device, characterized in that, The acquisition unit determines the rate of change of antifreeze volume, the rate of change of gaseous substance amount, and the hydrogen concentration in the expansion tank. The detection unit is used to detect the rotational speed data of the water pump in the cooling system where the expansion tank is located, wherein the rotational speed data is used to provide feedback on the stable state of the water pump; The determining unit is used to determine the leakage of the coolant based on the antifreeze volume change rate, the gaseous substance amount change rate, and the hydrogen concentration when the water pump is in a stable state. When the water pump is in a stable state, determining the leakage status of the coolant based on the antifreeze volume change rate, the gaseous substance quantity change rate, and the hydrogen concentration includes: When the rate of change of antifreeze volume exceeds a first threshold and shows a gradually increasing trend. Furthermore, the rate of change of the amount of gaseous substance is greater than the second threshold and shows a gradually increasing trend. If the hydrogen concentration is greater than or equal to the third threshold, it is determined that the antifreeze has leaked into the hydrogen flow channel of the fuel cell stack. When the water pump is in a stable state, determining the leakage status of the coolant based on the antifreeze volume change rate, the gaseous substance quantity change rate, and the hydrogen concentration includes: When the rate of change of antifreeze volume exceeds a first threshold and shows a gradually increasing trend. Furthermore, the rate of change of the amount of gaseous substance is greater than the second threshold and shows a gradually increasing trend. If the hydrogen concentration is less than the third threshold, it is determined that the antifreeze has leaked into the fuel cell stack airflow channel. When the water pump is in a stable state, determining the leakage status of the coolant based on the antifreeze volume change rate, the gaseous substance quantity change rate, and the hydrogen concentration includes: When the rate of change of antifreeze volume exceeds a first threshold and shows a gradually increasing trend. Furthermore, the rate of change of the amount of the gaseous substance is less than or equal to the second threshold, exhibiting a state that is not easily fluctuated. If the hydrogen concentration is less than the third threshold, it is determined that the antifreeze is leaking.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed by a processor, it implements the steps of the coolant leak detection method as described in any one of claims 1 to 4.

7. An electronic device, characterized in that, The electronic device includes at least one processor and at least one memory connected to the processor; wherein the processor is configured to call program instructions in the memory to execute the steps of the coolant leakage detection method as described in any one of claims 1 to 4.

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