Sealing performance detection device and method for vehicle high-voltage battery cooling system

Abstract

The invention provides a sealing performance detection device and method for a vehicle high-voltage battery cooling system, and relates to the technical field of vehicle cooling system detection, and the sealing performance detection device for the vehicle high-voltage battery cooling system comprises an energy storage device which is used for providing an air source; one end of the inflation pipeline is communicated with the energy storage device, the other end of the inflation pipeline is a test end, and the test end is used for being communicated with the input end of the cooling system to be detected; the number of the electromagnetic valve switches is at least two, one of the at least two electromagnetic valve switches is arranged on the inflation pipeline, and the other of the at least two electromagnetic valve switches is detachably connected with the output end; the number of the air pressure sensors is at least two, at least one air pressure sensor is arranged between the energy storage device and the electromagnetic valve switch on the inflation pipeline, and at least one air pressure sensor is arranged between the electromagnetic valve switch on the inflation pipeline and the test end, and the problem that in the prior art, the detection precision of a detection method is low is solved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle cooling system detection, and in particular to a sealing detection device and method for a vehicle high-voltage battery cooling system. Background Art

[0002] The high-voltage battery of a new energy commercial vehicle provides electrical energy for the vehicle drive. A large amount of heat is generated during the charging and discharging process. If the generated heat cannot be removed in time, its capacity will decay and its life will be reduced. In severe cases, thermal runaway may occur, so coolant is needed to dissipate the heat. Under low temperature conditions, the activity of the high-voltage battery is weakened, resulting in a lower charging rate and a lower power than that in normal temperature environments. Therefore, coolant is needed as a heating medium for heating. The coolant cannot leak during the entire working process of the power battery. Once a leak occurs at a certain position in the cooling line, the entire cooling system will not work properly, and the component assembly will not be able to cool down, causing the components to be damaged in a high temperature environment.

[0003] Therefore, after the power battery is assembled, the cooling system needs to be leak tested. Only after the leak test results meet the design technical requirements can the next step of vehicle assembly be carried out. Current testing methods are difficult to detect whether the cooling system can meet the usage requirements.

[0004] To address the above problems, no effective solution has been proposed yet. Summary of the invention

[0005] The main purpose of the present application is to provide a sealing detection device and method for a vehicle high-voltage battery cooling system, so as to solve the problem of low detection accuracy of the detection method in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a sealing detection device for a vehicle high-voltage battery cooling system is provided, including: an energy storage device, the energy storage device is used to provide an air source; an air charging pipeline, one end of the air charging pipeline is connected to the energy storage device, and the other end of the air charging pipeline is a test end, and the test end is used to connect to the input end of the cooling system to be detected; a solenoid valve switch, there are at least two solenoid valve switches, one of the at least two solenoid valve switches is arranged on the air charging pipeline, and the other of the at least two solenoid valve switches is detachably connected to the output end; an air pressure sensor, there are at least two air pressure sensors, and at least one air pressure sensor is arranged between the energy storage device and the solenoid valve switch on the air charging pipeline, and between the solenoid valve switch on the air charging pipeline and the test end.

[0007] Furthermore, the inflation pipeline includes: a first inflation pipeline, one end of which is connected to the energy storage device, and a first air pressure sensor is arranged on the first inflation pipeline; a second inflation pipeline, the other end of which is connected to one end of the second inflation pipeline through an electromagnetic valve switch, the other end of the second inflation pipeline is connected to the test end, and a second air pressure sensor is arranged on the second inflation pipeline.

[0008] Furthermore, the solenoid valve switch includes: a first solenoid valve switch, through which the first inflation pipeline is connected to the second inflation pipeline; and a second solenoid valve switch, which is used to be detachably connected to the output end.

[0009] Furthermore, the sealing detection device also includes: a flow meter, which is arranged between the solenoid valve switch and the test end on the inflation pipeline; and a pressure regulator, which is arranged on the inflation pipeline.

[0010] Furthermore, the sealing detection device also includes: a three-way valve, the first end of the three-way valve is connected to the inflation pipeline, the second end of the three-way valve is connected to the input end, and the third end of the three-way valve can be selectively opened or closed; wherein, the flow meter is arranged on the pipeline between the three-way valve and the test end.

[0011] Furthermore, the sealing detection device also includes: a controller, which is electrically connected to the energy storage device, the solenoid valve switch, and the air pressure sensor respectively; a power supply, which is electrically connected to the controller and the air pressure sensor.

[0012] Furthermore, the sealing detection device also includes: a display screen, which is electrically connected to the controller; a plurality of buttons, each of which is electrically connected to the controller; a transformer, and the power supply is electrically connected to the controller and the air pressure sensor through the transformer.

[0013] According to another aspect of the present application, a method for detecting the sealing performance of a vehicle high-voltage battery cooling system is provided. The sealing performance detection device for a vehicle high-voltage battery cooling system is used for detection. The sealing performance detection method comprises the following steps:

[0014] Connect the measuring end of the charging pipeline to the input end of the cooling system to be tested, and connect the output end of the cooling system to be tested to the solenoid valve switch;

[0015] Close the solenoid valve switch connected to the output end of the cooling system to be tested, and control the solenoid valve switch on the charging pipeline to open; control the energy storage device to inflate the charging pipeline; obtain a first pressure value and a second pressure value, wherein the first pressure value is the air pressure value of the pipeline between the energy storage device and the solenoid valve switch on the charging pipeline, and the second pressure value is the air pressure value of the pipeline between the solenoid valve switch on the charging pipeline and the cooling system to be tested; when it is determined that the first pressure value is equal to the second pressure value, control the solenoid valve switch on the charging pipeline to close, and obtain a third pressure value and a fourth pressure value, wherein the third pressure value is the air pressure value of the pipeline between the current energy storage device and the solenoid valve switch on the charging pipeline, and the fourth pressure value is the air pressure value of the pipeline between the current solenoid valve switch on the charging pipeline and the cooling system to be tested; judge the sealing of the cooling system to be tested by the third pressure value and the fourth pressure value.

[0016] Furthermore, controlling the energy storage device to inflate the air in the air charging pipeline includes: controlling the first solenoid valve switch to close; controlling the energy storage device to inflate the first air charging pipeline, and controlling the pressure regulator to adjust the gas pressure output by the energy storage device; when it is determined that the first pressure value in the first air charging pipeline is equal to the target pressure value, controlling the first solenoid valve switch to open, wherein the target pressure value is the pressure value set by the pressure regulator; when it is determined that the first solenoid valve switch is open and the second solenoid valve switch is closed, controlling the energy storage device to inflate the second air charging pipeline and the cooling system to be detected through the first air charging pipeline.

[0017] Furthermore, the method also includes: when it is determined that the third pressure value and the fourth pressure value are not equal, controlling the first solenoid valve switch to open until the third pressure value is equal to the fourth pressure value; when it is determined that the third pressure value and the fourth pressure value are equal, obtaining the flow value within a preset time length; based on the preset time length and the flow value, determining the leakage rate of the cooling system to be tested.

[0018] By applying the technical solution of the present application, the sealing performance of the high-voltage battery cooling system can be effectively detected by providing pressurized gas, using a solenoid valve to control the input and release of gas, and combining real-time monitoring with a pressure sensor. The coordinated use of the solenoid valve and the pressure sensor makes the detection process more automated, improves the detection efficiency and accuracy, and thus solves the problem of low detection accuracy of the detection method in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1A structural diagram showing an embodiment of a sealing detection device for a vehicle high-voltage battery cooling system according to the present application;

[0021] Figure 2 A circuit diagram showing an embodiment of a sealing detection device for a vehicle high-voltage battery cooling system according to the present application;

[0022] Figure 3 A flow chart of an embodiment of a method for detecting the sealing performance of a vehicle high-voltage battery cooling system according to the present application is shown.

[0023] The above drawings include the following reference numerals:

[0024] 1. Energy storage device;

[0025] 2. Inflating pipeline; 21. First inflating pipeline; 22. Second inflating pipeline;

[0026] 3. Pressure regulator;

[0027] 4. Air pressure sensor; 41. First air pressure sensor; 42. Second air pressure sensor;

[0028] 5. Flow meter;

[0029] 7. Solenoid valve switch; 71. First solenoid valve switch; 72. Second solenoid valve switch;

[0030] 8. Controller; 81. Display screen; 82. Buttons;

[0031] 9. Cooling system to be tested; 91. Input end; 92. Output end;

[0032] 11. Three-way valve; 12. Power supply; 13. Transformer; 14. Insurance; 15. DCDC converter. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0037] Combination Figure 1 As shown, in a specific embodiment of the present application, a sealing detection device for a vehicle high-voltage battery cooling system is provided.

[0038] Specifically, a sealing detection device for a vehicle high-voltage battery cooling system includes an energy storage device 1, an air charging line 2, a solenoid valve switch 7 and an air pressure sensor 4, wherein the energy storage device 1 is used to provide an air source; one end of the air charging line 2 is connected to the energy storage device 1, and the other end of the air charging line 2 is a test end, which is used to be connected to an input end 91 of a cooling system 9 to be detected; there are at least two solenoid valve switches 7, at least one of the two solenoid valve switches 7 is arranged on the air charging line 2, and the other of the at least two solenoid valve switches 7 is detachably connected to an output end 92; there are at least two air pressure sensors 4, and at least one air pressure sensor 4 is arranged between the energy storage device 1 and the solenoid valve switch 7 on the air charging line 2, and between the solenoid valve switch 7 on the air charging line 2 and the test end.

[0039] In this embodiment, the energy storage device 1 provides the required gas pressure during the detection process, and confirms whether there is a leak in the cooling system by air tightness detection, and the gas-filled pipeline 2 is used to realize the transmission of gas from the energy storage device 1 to the cooling system 9 to be detected. The solenoid valve switch 7 arranged on the gas-filled pipeline 2 is used to control the time and flow rate of gas entering the cooling system, and the solenoid valve switch 7 detachably connected to the output end 92 is used to quickly release the gas in the pipeline at the end of the test, or to control the airflow as needed during the detection process. One air pressure sensor 4 is located between the energy storage device 1 and the solenoid valve switch 7 on the gas-filled pipeline 2, and the other air pressure sensor 4 is located between the solenoid valve switch 7 on the gas-filled pipeline 2 and the test end. By comparing the readings of the two air pressure sensors 4, it can be determined whether there is a leak in the cooling system.

[0040] By applying the technical solution of the present application, the sealing performance of the high-voltage battery cooling system can be effectively detected by providing pressurized gas, using the solenoid valve switch 7 to control the input and release of gas, and combining the real-time monitoring of the air pressure sensor 4. The coordinated use of the solenoid valve switch 7 and the air pressure sensor 4 makes the detection process more automated, improves the detection efficiency and accuracy, and thus solves the problem of low detection accuracy of the detection method in the prior art.

[0041] Furthermore, the inflation pipeline 2 includes a first inflation pipeline 21 and a second inflation pipeline 22, one end of the first inflation pipeline 21 is connected to the energy storage device 1, and a first air pressure sensor 41 is provided on the first inflation pipeline 21; the other end of the first inflation pipeline 21 is connected to one end of the second inflation pipeline 22 through the solenoid valve switch 7, and the other end of the second inflation pipeline 22 is connected to the test end, and a second air pressure sensor 42 is provided on the second inflation pipeline 22.

[0042] Combination Figure 1As shown, the first air charging pipeline 21 is mainly responsible for the gas transmission from the energy storage device 1 to the solenoid valve switch 7, and a first air pressure sensor 41 is installed on it to monitor the pressure of the gas in this section of the pipeline. The air pressure state of the first air charging pipeline 21 reflects the air tightness of the gas source (energy storage device 1) before reaching the input end 91 of the cooling system 9 to be detected. The second air charging pipeline 22 extends from the rear side of the solenoid valve switch 7 and is finally connected to the input end 91 of the cooling system 9 to be detected, and is used to introduce gas into the cooling system 9 to be detected for sealing testing. A second air pressure sensor 42 is set on the second air charging pipeline to monitor the pressure of the gas between the solenoid valve switch 7 and the cooling system 9 to be detected. This reading reflects the state of the gas approaching the system to be detected. In this embodiment, the separation design of the first air charging pipeline 21 and the second air charging pipeline 22, plus the cooperation of the solenoid valve switch 7 and the two air pressure sensors 4, enables the detection device to more accurately determine whether the leakage occurs inside the cooling system, rather than the problem of the detection device itself. In addition, such a design also facilitates independent testing and maintenance of different sections of the pipeline, enhancing the stability and reliability of the entire system. By adjusting the solenoid valve switch 7, the pressure and time of the test can be controlled, thereby performing adaptability tests on different types of high-voltage battery cooling systems.

[0043] Furthermore, the solenoid valve switch 7 includes a first solenoid valve switch 71 and a second solenoid valve switch 72 , and the first inflation pipeline 21 is connected to the second inflation pipeline 22 via the first solenoid valve switch 71 ; the second solenoid valve switch 72 is used to be detachably connected to the output end 92 .

[0044] In this embodiment, the first solenoid valve switch 71 is arranged on the first gas charging line 21, and is used to control the on and off of the gas from the energy storage device 1 to the second gas charging line 22. The second solenoid valve switch 72 is detachably connected to the output end 92 of the cooling system, and its main function is to quickly release the pressure after the detection is completed. Before the detection, it is necessary to perform an air tightness test on the sealing detection device, connect the second solenoid valve switch 72 to the test end of the second gas charging line 22, and close the second solenoid valve switch 72, at which time the gas is allowed to enter the first gas charging line 21 and the second gas charging line 22 from the energy storage device 1. When the air pressure value in the first gas charging line 21 and the second gas charging line 22 reaches the target air pressure value, the inflation is stopped, and the first solenoid valve switch 71 is closed to detect whether the readings of the two air pressure sensors 4 change within a period of time. If the readings of the two air pressure sensors 4 do not change, it proves that the air tightness of the sealing detection device is good. In the test preparation stage, the test end of the second gas charging pipeline 22 is connected to the input end 91 of the cooling system 9 to be tested, the second solenoid valve switch 72 is connected to the output end 92 of the cooling system 9 to be tested, the first solenoid valve switch 71 is turned on, and the second solenoid valve switch 72 is closed, at which time the gas is allowed to flow from the energy storage device 1 through the first gas charging pipeline 21 and the second gas charging pipeline 22 to the input end 91 of the cooling system. When the system needs to perform a gas charging and pressure maintenance test, the first solenoid valve switch 71 is closed to form a closed system, so as to detect whether the readings of the two air pressure sensors 4 change within a certain period of time, and determine whether there is a leak in the cooling system 9 to be tested. After the test is completed, the pressure is released through the second solenoid valve switch 72.

[0045] Furthermore, the sealing detection device also includes a flow meter 5 and a pressure regulator 3, and the flow meter 5 is arranged between the solenoid valve switch 7 on the inflation pipeline 2 and the test end;

[0046] When detecting the gas leakage rate of the cooling system, the role of the flow meter 5 is particularly critical. When it is detected that the cooling system 9 to be detected has poor sealing, that is, there is a gas leak, the flow meter 5 can record the volume of gas that needs to be replenished in a certain period of time to maintain a constant pressure, and then calculate the leakage rate. This step provides a method for quantitatively evaluating the sealing of the cooling system, making the test results more intuitive and accurate.

[0047] Furthermore, a pressure regulator 3 is provided on the charging pipeline 2. The function of the pressure regulator 3 is to adjust the gas pressure provided by the energy storage device 1 to a specified pressure value that meets the detection requirements, ensuring the consistency and comparability of the test conditions. Through the pressure regulator 3, the pressure environment of the high-voltage battery cooling system under different working conditions can be simulated. For example, when simulating the highest pressure in the coolant circulation process, it is ensured that the test conditions are as close as possible to the actual working conditions, thereby improving the accuracy and reliability of the detection.

[0048] In summary, the addition of the flow meter 5 and the pressure regulator 3 not only enables the detection device to perform a more comprehensive and accurate airtightness assessment, but also enables the quantitative calculation of the leakage rate of the cooling system 9 to be detected. Such a design helps to more accurately control and optimize the performance of the high-voltage battery cooling system in the research and development and production of new energy vehicles, ensuring its safety and efficiency in actual use. By recording the amount of gas replenishment required by the system within a specific time through the flow meter, combined with the constant pressure maintained by the pressure regulator, the detection device can automatically calculate the gas leakage rate of the cooling system 9 to be detected, providing data support for subsequent system improvements and troubleshooting.

[0049] Furthermore, the sealing detection device also includes a three-way valve 11, a first end of the three-way valve 11 is connected to the inflation pipeline 2, a second end of the three-way valve 11 is connected to the input end 91, and a third end of the three-way valve 11 can be selectively opened or closed; wherein, the flow meter 5 is arranged on the pipeline between the three-way valve 11 and the test end.

[0050] In this embodiment, the third end of the three-way valve 11 is closed during the inflation phase, the first end is connected to the inflation pipeline 2, and the second end is connected to the test end. At this time, the system controls the gas from the energy storage device 1 through the pressure regulator 3 and the flow meter 5 through the first solenoid valve switch 71 and the second solenoid valve switch 72, and finally enters the cooling system 9 to be tested for sealing detection. After the test is completed, in order to safely and quickly reduce the system pressure, the third end of the three-way valve 11 can be opened and connected to the atmospheric environment, so that the gas in the inflation pipeline 2 and the cooling system 9 to be tested can be directly discharged into the atmosphere without the need for long-term natural pressure relief or additional pressure relief pipelines, thereby improving the efficiency and safety of the test. The flow meter 5 is arranged on the pipeline between the three-way valve 11 and the test end, so that the flow rate of the gas entering the cooling system 9 to be tested can be accurately measured during the sealing test. When detecting whether there is a gas leakage rate in the cooling system, the reading change of the flow meter 5 will directly reflect the sealing performance of the cooling system 9 to be tested. Through the data recorded by it, combined with the measurement results of the air pressure sensor 4, the gas leakage rate of the cooling system can be automatically calculated.

[0051] Furthermore, the sealing detection device also includes a controller 8 and a power supply 12. The controller 8 is electrically connected to the energy storage device 1, the solenoid valve switch 7, and the air pressure sensor 4 respectively; the power supply 12 is electrically connected to the controller 8, and the power supply 12 is electrically connected to the air pressure sensor 4.

[0052] In this embodiment, the controller 8 is responsible for coordinating and controlling the operation of the energy storage device 1, the solenoid valve switch 7 and the air pressure sensor 4. The controller 8 receives pressure data from the air pressure sensor 4 through electrical connection, and analyzes these data to determine the sealing performance of the cooling system 9 to be tested. At the same time, it can also control the opening and closing of the solenoid valve switch 7, and finely adjust the pressure of the pressure regulator 3 to ensure that the pressure environment during the test meets the preset requirements. In addition, the controller 8 can also automatically calculate the leakage rate based on the test results, thereby improving the degree of automation and accuracy of the detection. The power supply 12 provides the necessary power for the controller 8, the air pressure sensor 4 and other electrical components in the detection device.

[0053] Furthermore, the sealing detection device also includes a display screen 81, a button 82 and a transformer 13. The display screen 81 is electrically connected to the controller 8; there are multiple buttons 82, and each button 82 is electrically connected to the controller 8 respectively; the power supply 12 is electrically connected to the controller 8 and the air pressure sensor 4 respectively through the transformer 13.

[0054] In this embodiment, the display screen 81 is electrically connected to the controller 8, and as a human-computer interaction interface, it can display key data in the detection process in real time, including but not limited to inflation pressure, pressure holding time, leakage rate, etc. The design of the display screen enables the operator to intuitively understand the system status and perform necessary monitoring and adjustments. There are multiple buttons 82, each of which is electrically connected to the controller 8, forming an operation panel, allowing the operator to manually input instructions or parameters as needed, such as setting inflation pressure, pressure holding time or starting the detection program. The transformer 13 serves as a power conversion device between the power supply 12 and the controller 8 and the air pressure sensor 4, and is responsible for adjusting the voltage input by the power supply 12 to a voltage level suitable for the operation of the controller 8 and the air pressure sensor 4.

[0055] In one embodiment of the present application, Figure 2 As shown, the sealing detection device also includes a fuse 14 and a DCDC converter 15. One end of the fuse 14 is electrically connected to the power supply 12, and the other end of the fuse 14 is electrically connected to one end of the DCDC converter 15 through a switch. The other end of the DCDC converter 15 is electrically connected to the controller 8. The fuse 14 prevents damage to the system by electrical faults through overload protection, and the DCDC converter 15 ensures that the controller 8 obtains appropriate and stable electrical energy through voltage regulation. The two work together to provide a solid electrical foundation for the efficient and safe operation of the detection device.

[0056] In another embodiment of the present application, a method for detecting the sealing performance of a vehicle high-voltage battery cooling system is provided. The sealing performance detection device for a vehicle high-voltage battery cooling system is used for detection. The sealing performance detection method comprises the following steps:

[0057] Step S01, connecting the measuring end of the charging pipeline to the input end of the cooling system to be detected, and connecting the output end of the cooling system to be detected to the solenoid valve switch.

[0058] In step S01, ensure that the inflation pipeline (including pressure regulator, flow meter, air pressure sensor, etc.) forms a closed loop with the cooling system to be tested, providing a basis for subsequent inflation and pressure testing.

[0059] Step S02, closing the solenoid valve switch connected to the output end of the cooling system to be detected, and controlling the solenoid valve switch on the inflation pipeline to open.

[0060] In step S02, the purpose is to form a closed test environment during the inflation test to prevent the gas from flowing out directly during the test phase and affecting the accuracy of the test.

[0061] Step S03, controlling the energy storage device to inflate air into the air charging pipeline.

[0062] In step S03, a completely closed inflation environment is established by controlling the state of the electromagnetic valve switch, and pressure filling is prepared.

[0063] Step S04, obtaining a first pressure value and a second pressure value, wherein the first pressure value is the air pressure value of the pipeline between the energy storage device and the solenoid valve switch on the charging pipeline, and the second pressure value is the air pressure value of the pipeline between the solenoid valve switch on the charging pipeline and the cooling system to be detected, wherein the first pressure value is obtained by a first air pressure sensor set on the first charging pipeline, and the second pressure value is obtained by a second air pressure sensor set on the second charging pipeline.

[0064] In step S04, the first pressure value is the air pressure value in the first inflation pipeline, and the second pressure value is the air pressure value in the second inflation pipeline. This setting ensures that the pressure at both ends of the cooling system is balanced after inflation, which provides a benchmark for detecting the overall sealing of the cooling system.

[0065] Step S05, when it is determined that the first pressure value is equal to the second pressure value, the solenoid valve switch on the charging pipeline is controlled to close, and a third pressure value and a fourth pressure value are obtained, wherein the third pressure value is the air pressure value of the pipeline between the current energy storage device and the solenoid valve switch on the charging pipeline, and the fourth pressure value is the air pressure value of the pipeline between the current solenoid valve switch on the charging pipeline and the cooling system to be detected.

[0066] In step S05, the third pressure value is the current air pressure value in the first inflation pipeline, and the fourth pressure value is the current air pressure value in the second inflation pipeline. The closure of the solenoid valve switch is set in this way to isolate the replenishment of external gas, so that the pressure in the system can naturally decrease with time, thereby reflecting the sealing performance of the cooling system.

[0067] Step S06: judging the sealing performance of the cooling system to be tested by using the third pressure value and the fourth pressure value.

[0068] In step S06, by comparing the third pressure value and the fourth pressure value, the controller can determine the sealing performance of the cooling system to be tested. If the third pressure value and the fourth pressure value remain consistent during the pressure holding period, it indicates that the cooling system is well sealed and has no leakage; if the fourth pressure value is significantly lower than the third pressure value, it indicates that there is leakage in the system and the sealing performance is poor.

[0069] Through the above steps, according to the feedback of the air pressure sensor, the solenoid valve switch is controlled to complete the inflation, pressure maintenance and pressure reading, and finally realize the fast and accurate detection of the sealing.

[0070] Furthermore, the method further comprises the following steps:

[0071] Step S11, controlling the first solenoid valve to be switched on.

[0072] In step S11, this step is in the preparation stage before inflation, by closing the first solenoid valve, the direct gas flow between the inflation pipeline and the energy storage device is cut off, so as to provide a closed environment for the subsequent pressure regulation and inflation process.

[0073] Step S12, controlling the energy storage device to inflate the first inflation pipeline, and controlling the pressure regulator to adjust the gas pressure output by the energy storage device.

[0074] In step S12, the energy storage device starts to supply gas to the charging pipeline, and the pressure regulator is responsible for adjusting the gas pressure to the target pressure value, that is, the highest pressure value that the high-voltage battery cooling system may encounter under normal working conditions, thereby simulating the actual working environment and improving the authenticity and effectiveness of the detection.

[0075] Step S13, when it is determined that the first pressure value in the first inflation pipeline is equal to the target pressure value, the first solenoid valve switch is controlled to open, wherein the target pressure value is the pressure value set by the pressure regulator.

[0076] In step S13, when the air pressure in the inflation pipeline reaches the target value, the first solenoid valve is reopened to allow the gas to continue to flow to the cooling system. This step ensures the pressure consistency at both ends of the system to be tested before inflation, laying the foundation for accurate detection.

[0077] Step S14, when it is determined that the first solenoid valve switch is open and the second solenoid valve switch is closed, the energy storage device is controlled to charge the second charging pipeline and the cooling system to be detected through the first charging pipeline.

[0078] In step S14, the cooling system to be tested begins to be inflated, while the second solenoid valve remains closed to ensure that the gas can only enter the cooling system and will not leak out immediately. The system is inflated until the pressure in the inflation line and the cooling system reaches the target pressure value, which not only verifies the sealing of the cooling system, but also ensures the consistency of the pressure state of the entire system before testing, providing an accurate reference point for subsequent pressure maintenance and leak detection.

[0079] Through the above steps, the inflation pressure can be accurately controlled to ensure the stability and consistency of the entire inflation process, thus providing a standardized and repeatable test environment for the sealing test of the high-voltage battery cooling system. This not only improves the accuracy of the test results, but also ensures the automation and efficiency of the operation.

[0080] Furthermore, the method further comprises:

[0081] Step S21, when it is determined that the third pressure value is not equal to the fourth pressure value, control the first solenoid valve switch to open until the third pressure value is equal to the fourth pressure value.

[0082] Step S22, when it is determined that the third pressure value is equal to the fourth pressure value, obtaining the flow value within a preset time period.

[0083] Step S23, determining the leakage rate of the cooling system to be detected based on the preset time length and flow value.

[0084] In step S23, the gas loss per unit time is calculated based on the flow value measured within the preset time, and then the leakage rate of the test system at the target pressure is determined. This calculation process usually takes into account the gas state equation and the conditions of the test environment, such as temperature and ambient pressure, to ensure the accuracy and reliability of the calculation results.

[0085] Through the above steps, the sealing detection method can not only determine whether there is a leak in the cooling system to be tested, but also accurately quantify the degree of leakage, providing important data support for the performance evaluation and troubleshooting of the high-voltage battery cooling system.

[0086] Combination Figure 3 As shown, in another embodiment of the present application, a method for detecting the sealing performance of a vehicle high-voltage battery cooling system is provided, comprising the following steps:

[0087] S1. Connect the detection system: connect the measuring end of the charging pipeline to the input end of the cooling system to be detected, and connect the output end of the cooling system to be detected to the solenoid valve switch.

[0088] S2, self-test and pressure regulation process: control the first solenoid valve switch to close; control the energy storage device to inflate the first inflation pipeline, and control the pressure regulator to adjust the gas pressure output by the energy storage device; if the pressure in the first inflation pipeline is equal to the target pressure value, it proves that the detection device has no leakage and the working procedure of the controller automatically controlling the pressure regulator is normal.

[0089] S3, inflation and pressure maintaining process: after the pressure regulating process is completed, the controller controls the second electromagnetic switch to close and the first electromagnetic valve to open, and the compressed air after pressure regulation will slowly fill into the cooling system to be tested. When it is determined that the first pressure value is equal to the second pressure value, the first electromagnetic valve is controlled to close. After exceeding the specified time, whether the cooling water path to be tested is leaking is judged based on whether the third pressure value is equal to the fourth pressure value. If the third pressure value is equal to the fourth pressure value, it proves that there is no leakage in the cooling system; if the third pressure value is not equal to the fourth pressure value, there is a leakage in the cooling system.

[0090] S4. Leakage rate detection method:

[0091] S41. Air pressure leakage rate of the cooling system to be detected: when it is determined that the third pressure value and the fourth pressure value are not equal, the second air pressure sensor detects the fourth pressure value and transmits it to the controller. As time goes by, the fourth pressure value gradually decreases. Over a period of time, the air pressure leakage rate of the cooling system to be detected can be calculated based on the difference between the third pressure value and the fourth pressure value divided by time.

[0092] S42. Gas leakage rate of the cooling system to be tested: when it is determined that the third pressure value and the fourth pressure value are not equal, the controller controls the first electromagnetic switch to open until the third pressure value and the fourth pressure value are equal; when it is determined that the third pressure value and the fourth pressure value are equal, the controller controls the flow display switch of the (gas) flow meter to open, and calculates the gas leakage rate of the cooling system to be tested by measuring the gas flow in a certain period of time and dividing it by the time.

[0093] S5, pressure relief process: After the pressure maintenance test is completed, the controller controls the switch of the energy storage device to close; at the same time, the first solenoid valve and the second solenoid valve are opened, and the compressed air in the detection device and the cooling system to be detected is discharged to the atmosphere through the first solenoid valve and the second solenoid valve. From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0094] By providing pressurized gas, using the solenoid valve switch 7 to control the input and release of gas, and combining with real-time monitoring by the air pressure sensor 4, the sealing performance of the high-voltage battery cooling system can be effectively detected. The coordinated use of the solenoid valve switch 7 and the air pressure sensor 4 makes the detection process more automated, improves the detection efficiency and accuracy, and thus solves the problem of low detection accuracy of the detection method in the prior art.

[0095] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0096] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0097] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0098] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sealing detection device for a vehicle high-voltage battery cooling system, characterized in that: include: An energy storage device (1), wherein the energy storage device (1) is used to provide a gas source; An air charging pipeline (2), one end of the air charging pipeline (2) being in communication with the energy storage device (1), and the other end of the air charging pipeline (2) being a test end, the test end being used to be in communication with an input end (91) of a cooling system (9) to be tested; Solenoid valve switches (7), there are at least two solenoid valve switches (7), one of the at least two solenoid valve switches (7) is arranged on the inflation pipeline (2), and the other of the at least two solenoid valve switches (7) is detachably connected to the output end (92); An air pressure sensor (4), wherein there are at least two air pressure sensors (4), and at least one air pressure sensor (4) is provided between the energy storage device (1) and the electromagnetic valve switch (7) on the inflation pipeline (2), and between the electromagnetic valve switch (7) on the inflation pipeline (2) and the test end.

2. The sealing detection device according to claim 1, characterized in that: The inflation pipeline (2) comprises: A first air charging pipeline (21), one end of the first air charging pipeline (21) being in communication with the energy storage device (1), and a first air pressure sensor (41) being provided on the first air charging pipeline (21); A second air-inflating pipeline (22), wherein the other end of the first air-inflating pipeline (21) is connected to one end of the second air-inflating pipeline (22) via a solenoid valve switch (7), and the other end of the second air-inflating pipeline (22) is used to be connected to the test end, and a second air pressure sensor (42) is provided on the second air-inflating pipeline (22).

3. The sealing detection device according to claim 2, characterized in that: The solenoid valve switch (7) comprises: a first solenoid valve switch (71), wherein the first inflation pipeline (21) is connected to the second inflation pipeline (22) via the first solenoid valve switch (71); A second solenoid valve switch (72), wherein the second solenoid valve switch (72) is used to be detachably connected to the output end (92).

4. The sealing detection device according to claim 1, characterized in that: The sealing detection device also includes: A flow meter (5), the flow meter (5) being arranged between the solenoid valve switch (7) and the test end on the inflation pipeline (2); A pressure regulator (3), wherein the pressure regulator (3) is arranged on the inflation pipeline (2).

5. The sealing detection device according to claim 4, characterized in that: The sealing detection device also includes: A three-way valve (11), wherein a first end of the three-way valve (11) is in communication with the inflation pipeline (2), a second end of the three-way valve (11) is in communication with the input end (91), and a third end of the three-way valve (11) can be selectively opened or closed; Wherein, the flow meter (5) is arranged on the pipeline between the three-way valve (11) and the test end.

6. The sealing detection device according to any one of claims 1 to 5, characterized in that: The sealing detection device also includes: A controller (8), wherein the controller (8) is electrically connected to the energy storage device (1), the solenoid valve switch (7), and the air pressure sensor (4); A power supply (12), the power supply (12) is electrically connected to the controller (8), and the power supply (12) is electrically connected to the air pressure sensor (4).

7. The sealing detection device according to claim 6, characterized in that: The sealing detection device also includes: A display screen (81), the display screen (81) being electrically connected to the controller (8); A button (82), wherein the button (82) is multiple, and each button (82) is electrically connected to the controller (8); A transformer (13), wherein the power source (12) is electrically connected to the controller (8) and the air pressure sensor (4) respectively through the transformer (13).

8. A method for detecting the sealing performance of a vehicle high-voltage battery cooling system, using the sealing performance detection device for a vehicle high-voltage battery cooling system according to any one of claims 1 to 7 for detection, characterized in that: The sealing detection method comprises the following steps: Connect the measuring end of the charging pipeline to the input end of the cooling system to be tested, and connect the output end of the cooling system to be tested to the solenoid valve switch; The solenoid valve switch connected to the output end of the cooling system to be tested is closed, and the solenoid valve switch on the charging pipeline is controlled to open; Controlling the energy storage device to inflate the inflation pipeline; Acquire a first pressure value and a second pressure value, wherein the first pressure value is the air pressure value of the pipeline between the energy storage device and the solenoid valve switch on the charging pipeline, and the second pressure value is the air pressure value of the pipeline between the solenoid valve switch on the charging pipeline and the cooling system to be detected; When it is determined that the first pressure value is equal to the second pressure value, the solenoid valve switch on the charging pipeline is controlled to be closed, and a third pressure value and a fourth pressure value are obtained, wherein the third pressure value is the current air pressure value of the pipeline between the energy storage device and the solenoid valve switch on the charging pipeline, and the fourth pressure value is the current air pressure value of the pipeline between the solenoid valve switch on the charging pipeline and the cooling system to be detected; The sealing performance of the cooling system to be inspected is determined by using the third pressure value and the fourth pressure value.

9. The method according to claim 8, characterized in that Controlling the energy storage device to inflate the inflation pipeline includes: Controlling the first solenoid valve to close; Controlling the energy storage device to inflate the first gas charging pipeline, and controlling the pressure regulator to adjust the gas pressure output by the energy storage device; When it is determined that the first pressure value in the first inflation pipeline is equal to a target pressure value, controlling the first solenoid valve switch to open, wherein the target pressure value is a pressure value set by the pressure regulator; When it is determined that the first solenoid valve switch is open and the second solenoid valve switch is closed, the energy storage device is controlled to inflate the second charging pipeline and the cooling system to be detected through the first charging pipeline.

10. The method according to claim 8 or 9, characterized in that: The method further comprises: When it is determined that the third pressure value is not equal to the fourth pressure value, controlling the first solenoid valve switch to open until the third pressure value is equal to the fourth pressure value; When it is determined that the third pressure value is equal to the fourth pressure value, obtaining a flow value within a preset time period; Based on the preset time period and the flow value, a leakage rate of the cooling system to be inspected is determined.

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