Full liquid cooling charging pile leakage detection method and device

Abstract

The invention discloses a full-liquid-cooling charging pile leakage detection method and device, and aims to solve the technical problem that an existing full-liquid-cooling charging pile detection technology cannot respond in time when leakage occurs, so that measures cannot be taken in time. According to the method, monitoring values, obtained in real time, of various parameters of a charging pile system are compared with expected values, and leakage abnormity is judged according to the deviation of the two values. The device comprises a parameter acquisition module, a control module and a cut-off module, and comprehensively monitors key operation parameters of the charging pile, thereby providing a comprehensive leakage detection solution. In conclusion, the technical problems that in the prior art, response is not timely, and measures cannot be taken in time are effectively solved.

Description

Technical Field

[0001] The present application relates to the field of charging stack detection, and specifically to a leakage detection method and device for a fully liquid-cooled charging stack. Background Art

[0002] In recent years, as the mileage of electric vehicles continues to increase, the demand for charging has become increasingly strong. According to research on the electric vehicle market, it is almost inevitable that the charging current will increase to 500A. This trend places higher demands on the power and efficiency of charging facilities. In terms of power batteries, some battery companies have been able to mass-produce power batteries that can be charged at a 3C rate, ensure charging safety through perfect system thermal management, and adopt reasonable charging intervals and charging strategies to ensure the service life of power batteries. These advances provide a foundation for the development of high-power charging technology.

[0003] In terms of charging facilities, new technologies represented by charging piles have realized the integration of charging modules and the dynamic allocation of charging power, with charging power reaching 350kW and above. The development of this technology has made the research and development of higher-power fast charging a recognized development direction in the industry. The application of high-power and high-current charging can not only meet the needs of fast charging of electric vehicles, but also improve the operating efficiency of charging stations.

[0004] However, as the charging power increases, the thermal management problem of charging facilities becomes more prominent. When charging at high power, the traditional air-cooled charging stack is prone to overheating due to insufficient heat dissipation efficiency, affecting charging efficiency and safety. Therefore, the fully liquid-cooled charging stack has become the development direction of high-power and high-current charging due to its efficient thermal management capabilities. The fully liquid-cooled charging stack can more effectively dissipate the heat generated during the charging process through the circulation of coolant, improve charging efficiency, and at the same time reduce equipment failure rate and extend service life.

[0005] Although the fully liquid-cooled charging stack has many advantages, there is a risk of leakage and seepage in the coolant pipeline interface. Once a coolant leak occurs, the leaked coolant may flow into the electrical components of the charging stack, causing the battery module and other sensitive electronic components to come into contact with moisture and be damaged, or even short-circuit and cause fire or explosion, seriously threatening personnel safety and equipment integrity. Existing technologies usually rely on regular inspections by operators and some basic sensor monitoring, such as visual inspection, temperature monitoring, pressure and flow monitoring, to detect coolant leaks in fully liquid-cooled charging stacks. These methods have the disadvantages of slow response speed, insufficient detection sensitivity, and inability to monitor and locate leakage points in real time, resulting in the inability to take timely measures when a leak occurs, increasing safety risks. Therefore, there is an urgent need for a fully liquid-cooled charging stack leakage detection method and device that can promptly cut off the charging stack power input when a leak occurs to ensure personal and equipment safety. Summary of the invention

[0006] The purpose of the present invention is to provide a full liquid-cooled charging stack leakage detection method and device to overcome the shortcomings of the existing full liquid-cooled charging stack detection technology that cannot respond in time when a leak occurs and thus cannot take timely measures.

[0007] In order to achieve the above object, the present invention adopts the following technical solution: A full liquid-cooled charging stack leakage detection method, characterized in that it comprises the following steps: Obtain the expected values ​​of various parameters of the charging stack system; Obtain monitoring values ​​of various parameters of the charging stack system; Compare the monitored value with the expected value, and if the deviation between the monitored value and the expected value is greater than a predetermined range, output a signal indicating that the system has leaked; The monitored value is compared with the expected value. If the deviation between the monitored value and the expected value is within a predetermined range, the monitored value of the charging stack system is continuously acquired, and the monitored value is repeatedly compared with the expected value.

[0008] Furthermore, the various parameters of the charging stack system obtained in the method include two parameters: a water pump flow parameter, a pipeline pressure parameter and / or a water tank liquid level parameter.

[0009] Furthermore, a method for detecting leakage of a fully liquid-cooled charging stack is provided, wherein the liquid level parameters of a water tank are obtained and leakage detection is performed based on the liquid level parameters of the water tank, and the method comprises the following steps: Before the charging stack system is powered on each time, a current water tank liquid level parameter is obtained as the expected value; During the operation of the system, the water tank liquid level parameter is continuously monitored as the monitoring value; Compare the monitored value of the water tank liquid level parameter with the expected value. If the monitored value is less than 95% of the expected value, a signal indicating a system leak is output; Compare the monitored value of the water tank liquid level parameter with the expected value. If the monitored value is greater than 95% of the expected value, continue to monitor the water tank liquid level parameter to obtain the monitored value, and repeat the comparison of the monitored value with the expected value.

[0010] Furthermore, a method for detecting leakage of a fully liquid-cooled charging stack is provided, wherein the water pump flow parameter and the pipeline pressure parameter are obtained, and leakage detection is performed through the pipeline pressure parameter, and the method comprises the following steps: Collect the water pump flow parameters and calculate the expected value of the pipeline pressure parameters based on the parameters; During the operation of the system, continuously monitoring the pipeline pressure parameter as the monitoring value; Compare the monitored value of the pipeline pressure parameter with the expected value, and if the deviation between the monitored value and the expected value is greater than 10%, output a signal indicating that the system has leaked; Compare the monitored value of the pipeline pressure parameter with the expected value. If the deviation between the monitored value and the expected value is less than 10%, continue to monitor the pipeline pressure parameter to obtain the monitored value, and repeat the comparison between the monitored value and the expected value.

[0011] Furthermore, the expected value calculation method of the pipeline pressure parameter is as follows:

[0012] Where P1 is the expected value of the pipe pressure parameter (in Pascals); P2 is the power of the pump (in Watts); Q is the pump flow parameter (in cubic meters per hour); ρ is the density of water (in kilograms per cubic meter); 9.8 is the acceleration of gravity (in meters per square second); and 1000 is the conversion factor for converting the flow from cubic meters per hour to cubic meters per second.

[0013] Furthermore, a method for detecting leakage of a fully liquid-cooled charging stack is provided, wherein a water pump flow parameter and a pipeline pressure parameter are obtained, and leakage detection is performed based on the water pump flow parameter, and the method comprises the following steps: Collect pipeline pressure parameters and calculate the expected value of water pump flow parameters based on the parameters; During the operation of the system, continuously monitoring the water pump flow parameter as the monitoring value; Compare the monitored value of the water pump flow parameter with the expected value. If the deviation between the monitored value and the expected value is greater than 5%, a signal indicating a system leak is output; Compare the monitored value of the water pump flow parameter with the expected value. If the deviation between the monitored value and the expected value is less than 5%, continue to monitor the pipeline pressure parameter to obtain the monitored value, and repeat the comparison between the monitored value and the expected value.

[0014] Furthermore, the method for calculating the expected value of the water pump flow parameter is as follows:

[0015] In the formula, Q is the expected value of the pump flow parameter (in cubic meters per hour); P2 is the power of the pump (in watts); P1 is the pipe pressure parameter (in Pascals); ρ is the density of water (in kilograms per cubic meter); 9.8 is the acceleration of gravity (in meters per square second); 1000 is the conversion factor for converting flow from cubic meters per second to cubic meters per hour.

[0016] A full liquid-cooled charging stack leakage detection device, comprising: A parameter acquisition module, including several sensors, is used to collect various parameters of the charging stack system and send them to the control module; A control module is used to receive and analyze various parameters of the charging stack system, and if the analysis result indicates that there is a leak, a leakage signal is sent to the cut-off module; The cut-off module is used to automatically cut off the power supply of the charging stack after receiving the leakage signal.

[0017] Furthermore, the parameter acquisition module includes two sensors, a flow sensor, a pressure sensor and / or a liquid level sensor, wherein: A liquid level sensor is arranged in a water tank of the charging stack system; A flow sensor is arranged in the pipe before the coolant enters the heat exchange area; The pressure sensor is arranged in the outlet pipe of the water pump.

[0018] Furthermore, the control module stores a method for calculating expected values ​​of various parameters of the charging stack system.

[0019] Compared with the prior art, the present invention has the following beneficial technical effects: A fully liquid-cooled charging stack leakage detection method monitors the key parameters in the charging stack system in real time, and through continuous data collection and analysis, it promptly identifies abnormal conditions in the system, significantly improving the response speed of leakage detection. When there is a significant deviation between the monitored parameters and the set expected values, the system will immediately issue a leakage signal and take corresponding safety measures. Secondly, by comparing the preset expected values ​​with the real-time measured values, the method can accurately determine whether a leak has occurred in the system, reducing the possibility of false alarms and missed alarms. This method effectively overcomes the defect of the prior art that it is unable to respond to leakage incidents in a timely manner, ensuring a timely response when a leak occurs, and protecting personal safety and equipment integrity. In addition, the combination of real-time monitoring and data analysis improves the accuracy of detection and reduces the possibility of false alarms, thereby improving the overall safety and reliability of the charging stack.

[0020] A fully liquid-cooled charging stack leakage detection device integrates a parameter acquisition module, a control module, and a cut-off module to form a comprehensive monitoring system that can comprehensively monitor the key operating parameters of the charging stack, thereby providing a comprehensive leakage detection solution. The device can collect and analyze various parameters of the charging stack system in real time to ensure that it can respond quickly in any abnormal situation. The device not only improves the sensitivity and accuracy of leakage detection, but also stores a calculation method for the expected value of the parameter in the control module of the device, so that the device can not only monitor the parameters, but also intelligently analyze and judge the leakage situation, thereby improving the accuracy of detection. Furthermore, when the control module detects a leak, the cut-off module can respond quickly and automatically cut off the power supply. This rapid response mechanism greatly improves the safety of the charging stack. Finally, the design of the device allows for rapid deployment and easy maintenance, reduces long-term operating costs, and improves the overall performance and reliability of the charging stack. Through these designs, the device of the present application effectively overcomes the technical problems of untimely response and inability to take timely measures in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of a flow chart of a method for detecting leakage of a fully liquid-cooled charging stack in an embodiment of the present invention.

[0022] Figure 2 The present invention is a flowchart of a method for leak detection by using water tank liquid level parameters in a leak detection method for a fully liquid-cooled charging stack according to an embodiment of the present invention.

[0023] Figure 3 The present invention is a flowchart of a method for leak detection by using pipeline pressure parameters in a leak detection method for a fully liquid-cooled charging stack according to an embodiment of the present invention.

[0024] Figure 4 The present invention is a flowchart of a method for leak detection by using water pump flow parameters in a leak detection method for a fully liquid-cooled charging stack according to an embodiment of the present invention.

[0025] Figure 5 Schematic diagram of the structure of a leakage detection device for a fully liquid-cooled charging stack in an embodiment of the present invention.

[0026] Figure 6 Schematic diagram of the installation position of a parameter acquisition module in a full liquid-cooled charging stack leakage detection device in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] 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 one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0031] Embodiment 1: like Figure 1 As shown in the figure, a full liquid-cooled charging stack leakage detection method in a specific embodiment of the present invention comprises the following steps: Obtain the expected values ​​of various parameters of the charging stack system; Obtain monitoring values ​​of various parameters of the charging stack system; Compare the monitored value with the expected value, and if the deviation between the monitored value and the expected value is greater than a predetermined range, output a signal indicating that the system has leaked; The monitored value is compared with the expected value. If the deviation between the monitored value and the expected value is within a predetermined range, the monitored value of the charging stack system is continuously acquired, and the monitored value is repeatedly compared with the expected value.

[0032] Preferably, the various parameters of the charging stack system described in this specific implementation method include water tank level parameters, water pump flow parameters, and pipeline pressure parameters, and the parameters are all obtained through sensors. The pressure sensor and flow sensor have a fast detection speed and can quickly respond to pressure and flow changes in the coolant system, thereby quickly detecting potential leaks. Although the liquid level sensor has a slow response speed, it can be used as a backup solution when the pressure and flow sensors do not work or fail to work, ensuring the continuity of leak detection and the safety of the system.

[0033] The detection method design of this specific implementation method includes a redundant configuration of sensors, that is, in addition to the fast-response pressure and flow sensors, the liquid level sensor is used as an auxiliary means to ensure that leaks can be detected in any situation. The slow response characteristics of the liquid level sensor make it suitable for monitoring long-term liquid level changes, such as chronic leaks, while the pressure and flow sensors are suitable for quickly identifying sudden leaks.

[0034] Before the full liquid-cooled charging stack system is started, the liquid level sensor outputs an initial fixed value, which represents the normal liquid level of the coolant in the water tank. The system records this value as the expected value of the liquid level. The system dynamically collects the output value of the liquid level sensor during the charging process. If the liquid level drops to less than 95% of the expected value, the system determines that a leak has occurred.

[0035] According to the following formula, the system can calculate the expected value of water pressure based on the known pump power and pump flow:

[0036] Where P1 is the expected value of the pipe pressure parameter (in Pascals); P2 is the power of the pump (in Watts); Q is the pump flow parameter (in cubic meters per hour); ρ is the density of water (in kilograms per cubic meter); 9.8 is the acceleration of gravity (in meters per square second); and 1000 is the conversion factor for converting the flow from cubic meters per hour to cubic meters per second.

[0037] During the charging process, the system uses the known water pump power and the collected water pump flow parameters to calculate an expected value of the pipeline pressure parameter, and compares the expected value of the pipeline pressure parameter with the pressure monitoring value actually measured by the pressure sensor. If the deviation exceeds ±10%, it is determined that the system is leaking.

[0038] Similarly, the system can also use the collected pipeline pressure parameters and pump power to calculate an expected value of the pump flow parameter. The calculation formula is as follows:

[0039] In the formula, Q is the expected value of the pump flow parameter (in cubic meters per hour); P2 is the power of the pump (in watts); P1 is the pipe pressure parameter (in Pascals); ρ is the density of water (in kilograms per cubic meter); 9.8 is the acceleration of gravity (in meters per square second); 1000 is the conversion factor for converting flow from cubic meters per second to cubic meters per hour.

[0040] Compare the expected value of the water pump flow parameter with the flow monitoring value actually measured by the flow sensor. If the deviation exceeds ±5%, it is determined that the system is leaking.

[0041] Embodiment 2: like Figure 2 Another method for detecting leakage of a fully liquid-cooled charging stack in a specific embodiment of the present invention is shown. The method in this specific embodiment only obtains the water tank liquid level parameter and performs leakage detection through the water tank liquid level parameter, including the following steps: Before the charging stack system is powered on each time, a current water tank liquid level parameter is obtained as the expected value; During the operation of the system, the water tank liquid level parameter is continuously monitored as the monitoring value; Compare the monitored value of the water tank liquid level parameter with the expected value. If the monitored value is less than 95% of the expected value, a signal indicating a system leak is output; Compare the monitored value of the water tank liquid level parameter with the expected value. If the monitored value is greater than 95% of the expected value, continue to monitor the water tank liquid level parameter to obtain the monitored value, and repeat the comparison of the monitored value with the expected value.

[0042] Embodiment 3: like Figure 3 Another method for detecting leakage of a fully liquid-cooled charging stack in a specific embodiment of the present invention is shown. The method in this specific embodiment obtains a water pump flow parameter and a pipeline pressure parameter, and performs leakage detection through the pipeline pressure parameter, including the following steps: Collect the water pump flow parameters and calculate the expected value of the pipeline pressure parameters based on the parameters; During the operation of the system, continuously monitoring the pipeline pressure parameter as the monitoring value; Compare the monitored value of the pipeline pressure parameter with the expected value, and if the deviation between the monitored value and the expected value is greater than 10%, output a signal indicating that the system has leaked; Compare the monitored value of the pipeline pressure parameter with the expected value. If the deviation between the monitored value and the expected value is less than 10%, continue to monitor the pipeline pressure parameter to obtain the monitored value, and repeat the comparison between the monitored value and the expected value.

[0043] The expected value calculation method of the pipeline pressure parameter is as follows:

[0044] Where P1 is the expected value of the pipe pressure parameter (in Pascals); P2 is the power of the pump (in Watts); Q is the pump flow parameter (in cubic meters per hour); ρ is the density of water (in kilograms per cubic meter); 9.8 is the acceleration of gravity (in meters per square second); and 1000 is the conversion factor for converting the flow from cubic meters per hour to cubic meters per second.

[0045] Embodiment 4: like Figure 4 Another method for detecting leakage of a fully liquid-cooled charging stack in a specific embodiment of the present invention is shown. The method in this specific embodiment obtains a water pump flow parameter and a pipeline pressure parameter, and performs leakage detection through the water pump flow parameter, including the following steps: Collect pipeline pressure parameters and calculate the expected value of water pump flow parameters based on the parameters; During the operation of the system, continuously monitoring the water pump flow parameter as the monitoring value; Compare the monitored value of the water pump flow parameter with the expected value. If the deviation between the monitored value and the expected value is greater than 5%, a signal indicating a system leak is output; Compare the monitored value of the water pump flow parameter with the expected value. If the deviation between the monitored value and the expected value is less than 5%, continue to monitor the pipeline pressure parameter to obtain the monitored value, and repeat the comparison between the monitored value and the expected value.

[0046] The method for calculating the expected value of the water pump flow parameter is as follows:

[0047] In the formula, Q is the expected value of the pump flow parameter (in cubic meters per hour); P2 is the power of the pump (in watts); P1 is the pipe pressure parameter (in Pascals); ρ is the density of water (in kilograms per cubic meter); 9.8 is the acceleration of gravity (in meters per square second); 1000 is the conversion factor for converting flow from cubic meters per second to cubic meters per hour.

[0048] Embodiment 5: like Figure 5 and Figure 6 As shown, a full liquid-cooled charging stack leakage detection device is provided in a specific embodiment of the present invention, and the structure of the device is as follows Figure 5 As shown, including: The parameter acquisition module includes several sensors, which are used to collect key parameters such as liquid level, flow rate and pressure of the charging stack system in real time and send them to the control module to provide the control module with accurate monitoring data for further analysis and processing; The control module is used to receive and analyze various parameters of the charging stack system. The control module has a method for calculating the expected values ​​of various parameters of the charging stack system. According to the built-in algorithm and the expected value calculation method, the control module determines whether there is a leak in the system and sends a leakage signal when necessary; if the analysis result of the control module on the various parameters of the charging stack system indicates that there is a leak in the charging stack system, a leakage signal is sent to the cut-off module; The cut-off module is used to automatically cut off the power supply of the charging stack after receiving a leakage signal, thereby preventing electrical safety accidents caused by leakage and ensuring the safety of personnel and equipment.

[0049] Preferably, Figure 6 As shown, the parameter acquisition module includes the following sensors: The liquid level sensor is arranged in the water tank of the charging stack system to monitor the liquid level change of the coolant in the water tank. The liquid level sensor has a current output and the model is CYW-11; A flow sensor is arranged in the pipeline before the coolant enters the heat exchange area to measure the flow rate of the coolant flowing through the pipeline. The flow sensor has a current output and the model is LDG-MIK-E80; The pressure sensor is arranged in the outlet pipe of the water pump to monitor the pressure of the coolant in the outlet pipe of the water pump. The pressure sensor has a voltage output and its model is PA1000.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A full liquid-cooled charging stack leakage detection method, characterized in that: The following steps are involved: Obtain the expected values ​​of various parameters of the charging stack system; Obtain monitoring values ​​of various parameters of the charging stack system; Compare the monitored value with the expected value, and if the deviation between the monitored value and the expected value is greater than a predetermined range, output a signal indicating that the system has leaked; The monitored value is compared with the expected value. If the deviation between the monitored value and the expected value is within a predetermined range, the monitored value of the charging stack system is continuously acquired, and the monitored value is repeatedly compared with the expected value.

2. A full liquid-cooled charging stack leakage detection method according to claim 1, characterized in that: The various parameters of the charging stack system obtained in the method include two parameters, namely, a water pump flow parameter and a pipeline pressure parameter and / or a water tank liquid level parameter.

3. A full liquid-cooled charging stack leakage detection method according to claim 2, characterized in that: Obtaining the water tank liquid level parameters and performing leakage detection based on the water tank liquid level parameters includes the following steps: Before the charging stack system is powered on each time, a current water tank liquid level parameter is obtained as the expected value; During the operation of the system, the water tank liquid level parameter is continuously monitored as the monitoring value; Compare the monitored value of the water tank liquid level parameter with the expected value. If the monitored value is less than 95% of the expected value, a signal indicating a system leak is output; Compare the monitored value of the water tank liquid level parameter with the expected value. If the monitored value is greater than 95% of the expected value, continue to monitor the water tank liquid level parameter to obtain the monitored value, and repeat the comparison of the monitored value with the expected value.

4. A full liquid-cooled charging stack leakage detection method according to claim 2, characterized in that: Obtaining the water pump flow parameters and pipeline pressure parameters, and performing leak detection based on the pipeline pressure parameters, includes the following steps: Collect the water pump flow parameters and calculate the expected value of the pipeline pressure parameters based on the parameters; During the operation of the system, continuously monitoring the pipeline pressure parameter as the monitoring value; Compare the monitored value of the pipeline pressure parameter with the expected value, and if the deviation between the monitored value and the expected value is greater than 10%, output a signal indicating that the system has leaked; Compare the monitored value of the pipeline pressure parameter with the expected value. If the deviation between the monitored value and the expected value is less than 10%, continue to monitor the pipeline pressure parameter to obtain the monitored value, and repeat the comparison between the monitored value and the expected value.

5. A full liquid-cooled charging stack leakage detection method according to claim 4, characterized in that: The expected value calculation method of the pipeline pressure parameter is as follows: Where P1 is the expected value of the pipeline pressure parameter; P2 is the power of the pump; Q is the pump flow parameter; ρ is the density of water; 9.8 is the acceleration of gravity; and 1000 is the conversion factor for converting the flow from cubic meters per hour to cubic meters per second.

6. A full liquid-cooled charging stack leakage detection method according to claim 2, characterized in that: Obtaining water pump flow parameters and pipeline pressure parameters, and performing leakage detection based on the water pump flow parameters, includes the following steps: Collect pipeline pressure parameters and calculate the expected value of water pump flow parameters based on the parameters; During the operation of the system, continuously monitoring the water pump flow parameter as the monitoring value; Compare the monitored value of the water pump flow parameter with the expected value. If the deviation between the monitored value and the expected value is greater than 5%, a signal indicating a system leak is output; Compare the monitored value of the water pump flow parameter with the expected value. If the deviation between the monitored value and the expected value is less than 5%, continue to monitor the pipeline pressure parameter to obtain the monitored value, and repeat the comparison between the monitored value and the expected value.

7. A full liquid-cooled charging stack leakage detection method according to claim 6, characterized in that: The method for calculating the expected value of the water pump flow parameter is as follows: In the formula, Q is the expected value of the pump flow parameter; P2 is the power of the pump; P1 is the pipeline pressure parameter; ρ is the density of water; 9.8 is the acceleration of gravity; 1000 is the conversion factor for converting the flow from cubic meters per second to cubic meters per hour.

8. A full liquid-cooled charging stack leakage detection device, characterized in that: The device comprises: A parameter acquisition module, including several sensors, is used to collect various parameters of the charging stack system and send them to the control module; A control module is used to receive and analyze various parameters of the charging stack system, and if the analysis result indicates that there is a leak, a leakage signal is sent to the cut-off module; The cut-off module is used to automatically cut off the power supply of the charging stack after receiving the leakage signal.

9. A full liquid-cooled charging stack leakage detection device according to claim 8, characterized in that: The parameter acquisition module includes two sensors, a flow sensor, a pressure sensor and / or a liquid level sensor, wherein: A liquid level sensor is arranged in the water tank of the charging stack system; A flow sensor is arranged in the pipe before the coolant enters the heat exchange area; The pressure sensor is arranged in the outlet pipe of the water pump.

10. A full liquid-cooled charging stack leakage detection device according to claim 8, characterized in that: The control module stores a method for calculating expected values ​​of various parameters of the charging stack system.

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