Liquid leakage detection system and liquid leakage detection method for liquid cooling plate

Abstract

The invention belongs to the technical field of new energy automobile liquid cooling systems and liquid leakage detection methods, and particularly discloses a liquid cooling plate liquid leakage detection system and a liquid leakage detection method.Pressure detection modules are arranged at a liquid inlet and a liquid outlet of a liquid cooling plate, the pressure difference of the liquid inlet and the liquid outlet of the liquid cooling plate is collected in real time, and whether liquid leakage occurs or not is judged through a processing module; meanwhile, more than three acoustic emission signal detection modules are arranged on the liquid cooling plate, acoustic emission signals on the surface of the liquid cooling plate are collected in real time, a processing module calculates the information source position of the acoustic emission signals through a positioning algorithm and stores the information source position, the information source position is further compared with the storage time of the liquid leakage judgment result, and the liquid leakage point position of the liquid cooling plate is determined. The method is implemented through the virtual mirror image model of the liquid cooling plate, so that a vehicle user or a maintainer can quickly and accurately position the liquid leakage position and take corresponding treatment measures, and the maintenance efficiency can be improved. According to the invention, the real-time accurate monitoring of the liquid leakage condition of the liquid cooling plate is realized, and the liquid leakage point positioning and display functions are realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid cooling systems and leakage detection methods for new energy vehicles, and in particular relates to a liquid cooling plate leakage detection system and a leakage detection method. Background Art

[0002] To ensure that the internal cells of the new energy vehicle battery system operate within the appropriate temperature range, the battery system is generally cooled by air cooling, liquid cooling or phase change material cooling.

[0003] Battery systems currently widely utilize liquid cooling, but the cooling plates within the battery system present a risk of leakage. Leakage not only impacts the cooling performance of the plates but also degrades the insulation performance of the battery system, posing a significant safety risk to electrical components. Conventional technology incorporates temperature, pressure, and gas sensors on the cooling plates, reporting these signals to the battery management system. The management system then compares these signals with preset thresholds to determine leakage. However, existing technology can only detect the presence of leakage, but cannot pinpoint its location or quantity. Summary of the Invention

[0004] In order to solve the problem that the leakage point cannot be determined in the prior art, the purpose of the present invention is to propose a liquid cooling plate leakage detection system and leakage detection method. By setting a pressure detection module at the liquid inlet and outlet of the liquid cooling plate, the pressure difference between the liquid cooling plate inlet and outlet is collected in real time. The processing module determines whether leakage occurs. At the same time, more than three acoustic emission signal detection modules are set on the liquid cooling plate for real-time detection of acoustic emission signals. The processing module calculates the source position through a positioning algorithm and comprehensively judges it with the above leakage judgment result to determine the location of the liquid cooling plate leakage point, so that prompt information indicating the location of the leakage point can be output subsequently, so that maintenance personnel or users of the vehicle to which the liquid cooling plate belongs can quickly and accurately locate the leakage area and take corresponding treatment measures, which is conducive to improving maintenance efficiency.

[0005] To achieve the above object, the present invention provides a liquid leakage detection method, which comprises:

[0006] Step S1: The pressure detection module collects the pressure difference between the inlet and outlet of the liquid cooling plate in real time;

[0007] Step S2: three or more acoustic emission signal detection modules collect acoustic emission signals on the surface of the liquid cooling plate in real time;

[0008] In step S3, the processing module determines whether the pressure difference between the inlet and outlet of the liquid cooling plate exceeds a preset pressure difference threshold based on the data collected by the pressure detection module, so as to determine whether the liquid cooling plate is leaking. If it is determined that the liquid cooling plate is leaking, the result of the liquid cooling plate leakage and the time when the processing module received the pressure difference between the inlet and outlet are combined and stored.

[0009] Step S4, the processing module is used to store the frequency and time of the acoustic emission signal collected by the acoustic emission signal detection module, calculate the source position of the acoustic emission signal of the frequency on the liquid cooling plate according to the time difference of the acoustic emission signals of the same frequency received by any three acoustic emission signal detection modules that are not in the same straight line, and merge and store the source position and the earliest receiving time of the acoustic emission signal of the frequency;

[0010] In step S5, the processing module compares the storage time of the result of the liquid cooling plate leakage with the storage time of the signal source positions of each frequency, and extracts the signal source position of a frequency closest to its storage time as the liquid cooling plate leakage point position.

[0011] Preferably, in the above technical solution, the preset pressure difference threshold in step S3 is set according to the upper limit of the pressure difference between the inlet and outlet of the liquid cooling plate at different water pump speeds when the automobile liquid cooling system is in normal working condition.

[0012] Preferably, in the above technical solution, the method for calculating the source position in step S4 includes: measuring the propagation speed of the acoustic emission signal in the liquid cooling plate by a sonic velocity meter to obtain a constant v; establishing a plane rectangular coordinate system on the surface of the liquid cooling plate, assuming that the source position of the acoustic emission signal of the i-th frequency is (X i , Y i ), let the storage time of the source position of the acoustic emission signal of the i-th frequency be T i ; Select any three acoustic emission signal detection modules that are not in the same straight line. The position of the first acoustic emission signal detection module is known to be (x i1 ,y i1 ), the time when the first acoustic emission signal detection module receives the acoustic emission signal of this frequency is T i1 ; The second acoustic emission signal detection module position is (x i2 ,y i2 ), the time when the second acoustic emission signal detection module receives the acoustic emission signal of this frequency is T i2 ; The third acoustic emission signal detection module position is (x i3 ,y i3 The time when the third acoustic emission signal detection module receives the acoustic emission signal of the frequency is T i3 ; Then the storage time of the source position of the acoustic emission signal of the i-th frequency is T i =min(T i1 , Ti2 , T i3 ); then the equations can be set up to solve the source position of the acoustic emission signal of the i-th frequency:

[0013]

[0014]

[0015] Solve the above equations for X i and Y i , we can get the source position of the acoustic emission signal of the i-th frequency (X i , Y i ).

[0016] Preferably, the above technical solution further includes step S6: establishing a virtual mirror model of the liquid cooling plate, the processing module marks the source position corresponding to the acoustic emission signal of each frequency on the virtual mirror model of the liquid cooling plate, and highlights the position of the liquid cooling plate leakage point.

[0017] A liquid cooling plate leakage detection system includes a pressure detection module, a processing module, and three or more acoustic emission signal detection modules. The pressure detection module and the acoustic emission signal detection module are respectively connected to the processing module for communication. The processing module is provided with a computer program. When the computer program is executed by the processing module, the steps of the above-mentioned leakage detection method are implemented.

[0018] Preferably, in the above technical solution, the pressure detection module includes a differential pressure sensor, the two test ports of the differential pressure sensor are respectively connected to the liquid inlet and the liquid outlet of the liquid cooling plate, and the differential pressure sensor is communicatively connected to the processing module.

[0019] Preferably, in the above technical solution, the number of the acoustic emission signal detection modules is three, the acoustic emission signal detection modules are arranged on the surface of the liquid cooling plate, and the three acoustic emission signal detection modules are far away from each other and are not on the same straight line.

[0020] Preferably, in the above technical solution, the acoustic emission signal detection module includes a resonant acoustic emission sensor, which is fixedly mounted on the surface of the liquid cooling plate. The contact interface between the detection end of the resonant acoustic emission sensor and the liquid cooling plate is filled with an acoustic coupling agent, and the resonant acoustic emission sensor is communicatively connected to the processing module.

[0021] Preferably, in the above technical solution, the processing module includes an amplifier and a processor, the amplifier is electrically connected to the processor, the amplifier is communicatively connected to the acoustic emission signal detection module, and the pressure detection module is communicatively connected to the processor.

[0022] Preferably, the above technical solution further includes a display, and the display is electrically connected to the processor.

[0023] Compared with the existing technology, the present invention has the following beneficial effects:

[0024] 1. The liquid cooling plate leakage detection system of the present invention sets pressure detection modules on the liquid inlet and outlet of the liquid cooling plate to collect the pressure difference between the liquid cooling plate inlet and outlet in real time. The processing module judges whether the liquid cooling plate is leaking by comparing with the preset pressure difference threshold, thereby realizing real-time and accurate monitoring of the liquid cooling plate leakage. The leakage detection method sets three or more acoustic emission signal detection modules on the liquid cooling plate to collect the acoustic emission signal on the surface of the liquid cooling plate in real time. The processing module calculates the signal source position through a positioning algorithm and combines it with the above leakage judgment result to determine the specific position of the liquid cooling plate leakage point, thereby realizing the leakage point positioning function.

[0025] 2. The leakage detection method of the present invention also includes establishing a plane rectangular coordinate system on the surface of the liquid cooling plate, setting the position of the acoustic emission signal detection module on the surface of the liquid cooling plate, and calculating the source position of the acoustic emission signal based on the time difference between the three acoustic emission signal detection modules receiving the same frequency acoustic emission signal. The source position is marked on the virtual mirror model of the liquid cooling plate to highlight the location of the liquid cooling plate leakage point. The vehicle user can quickly identify the area where the leakage point is located and take corresponding treatment measures. At the same time, based on the recorded and displayed source position, the vehicle maintenance personnel can quickly repair the leakage point, conduct accurate inspections on other source positions, and promptly deal with hidden dangers in areas where the source positions are concentrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the flow of the liquid leakage detection method of the present invention.

[0027] Figure 2 This is a communication connection diagram of the liquid cooling plate leakage detection system of the present invention.

[0028] Figure 3 This is a connection diagram of the liquid cooling plate leakage detection system of the present invention.

[0029] Among them, 1 is a pressure detection module, 2 is a processing module, 21 is an amplifier, 22 is a processor, 3 is an acoustic emission signal detection module, and 4 is a display. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "thick", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0032] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first," "second," and "third" are used solely for descriptive purposes and to distinguish technical features. They are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0034] Acoustic emission (AE), sometimes also called stress wave emission, is the phenomenon of localized stress concentration in a material, rapidly releasing energy and generating transient elastic waves. Deformation and crack propagation of materials under stress are important mechanisms of structural failure. Sources directly related to these deformation and fracture mechanisms are known as AE sources. Metals and alloys such as copper, zinc, aluminum, lead, tin, brass, cast iron, and steel exhibit AE during deformation.

[0035] Elastic waves emitted from an acoustic emission source eventually propagate to the surface of the material, causing surface displacements that can be detected by acoustic emission sensors. These sensors convert these transient surface displacements into electrical signals, which are then amplified, processed, and recorded to form their characteristic parameters. As a dynamic nondestructive testing technology, acoustic emission testing is widely used for real-time acoustic emission source location monitoring and data analysis and display on inspected components due to its dynamic characteristics, integrity, real-time nature, and cost-effectiveness.

[0036] like Figure 1 、 Figure 2 、 Figure 3 As shown, this embodiment provides a liquid leakage detection method, including the following steps:

[0037] Step S1, the pressure detection module 1 collects the pressure difference between the inlet and outlet of the liquid cooling plate in real time;

[0038] Specifically, the pressure detection module 1 includes a pressure difference sensor, which can directly collect the pressure difference data of the liquid inlet and outlet of the liquid cooling plate.

[0039] Step S2: three or more acoustic emission signal detection modules 3 collect acoustic emission signals on the surface of the liquid cooling plate in real time;

[0040] It's worth noting that, with regard to locating the acoustic emission source of the liquid cooling plate, the plate is typically made of a structurally stable metal material. This type of material exhibits low acoustic anisotropy and a low acoustic attenuation coefficient, resulting in a frequency band generally between 25 kHz and 10 MHz, which can be accurately detected by a resonant acoustic emission sensor. Therefore, in this embodiment, the acoustic emission detection module 3 preferably comprises three non-colinear resonant acoustic emission sensors, enabling effective acquisition of acoustic emission signals from the surface of the liquid cooling plate.

[0041] In step S3, the processing module 2 determines whether the pressure difference between the inlet and outlet of the liquid cooling plate exceeds a preset pressure difference threshold based on the data collected by the pressure detection module 1, so as to determine whether the liquid cooling plate is leaking. If it is determined that the liquid cooling plate is not leaking, the process returns to step S1. If it is determined that the liquid cooling plate is leaking, the result of the liquid cooling plate leaking and the time when the processing module 2 receives the pressure difference between the inlet and outlet are combined and stored.

[0042] Specifically, when the automobile liquid cooling system is in normal operation, the pressure difference between the inlet and outlet of the liquid cooling plate is continuously collected for a period of time through the pressure difference sensor, the range of the inlet and outlet pressure difference of the liquid cooling plate under different water pump speeds is determined, and the upper limit of this range is set as the preset pressure difference threshold; if the processing module 2 determines that the liquid cooling plate is leaking, the time of the received inlet and outlet pressure difference is stored as T0.

[0043] Step S4, the processing module is used to store the frequency and time of the acoustic emission signal collected by the acoustic emission signal detection module, calculate the source position of the acoustic emission signal of the frequency on the liquid cooling plate according to the time difference of the acoustic emission signals of the same frequency received by any three acoustic emission signal detection modules that are not in the same straight line, and merge and store the source position and the earliest receiving time of the acoustic emission signal of the frequency;

[0044] Specifically, the algorithm for calculating the source position of the acoustic emission signal of the frequency on the liquid cooling plate includes: measuring the propagation speed of the acoustic emission signal in the liquid cooling plate as a constant v by a sound velocity meter; establishing a plane rectangular coordinate system on the surface of the liquid cooling plate, and setting the source position of the acoustic emission signal of the i-th frequency as (X i , Y i ), let the storage time of the source position of the acoustic emission signal of the i-th frequency be T i ;

[0045] Select any three acoustic emission signal detection modules that are not in the same straight line. The position of the first acoustic emission signal detection module is known to be (x i1 ,y i1 ), the time when the first acoustic emission signal detection module receives the acoustic emission signal of this frequency is T i1 ; The second acoustic emission signal detection module position is (x i2 ,y i2 ), the time when the second acoustic emission signal detection module receives the acoustic emission signal of this frequency is T i2 ; The third acoustic emission signal detection module position is (x i3 ,y i3 The time when the third acoustic emission signal detection module receives the acoustic emission signal of the frequency is T i3 ; Then the equation group can be set up to solve the source position of the acoustic emission signal of the i-th frequency:

[0046]

[0047] Solve the above equations for X i and Y i , we can get the source position of the acoustic emission signal of the i-th frequency (X i , Y i ); In addition, the storage time T of the source position of the acoustic emission signal of the i-th frequency i =min(T i1 , T i2 , T i3 ).

[0048] In step S5, the processing module 2 compares the storage time of the result of the liquid cooling plate leakage with the storage time of the signal source positions of each frequency, and extracts the signal source position of a frequency closest to its storage time as the liquid cooling plate leakage point position.

[0049] Specifically, when the processing module 2 extracts the signal source position as the position of the liquid cooling plate leakage point, according to min(|T0-T i |) Calculate T i Then, the signal source position corresponding to the storage time is selected as the leakage point position of the liquid cooling plate.

[0050] The leakage detection method in this embodiment further includes step S6: establishing a virtual mirror model of the liquid cooling plate, wherein the processing module marks the source positions corresponding to the acoustic emission signals of each frequency on the virtual mirror model of the liquid cooling plate and highlights the position of the leakage point of the liquid cooling plate.

[0051] Specifically, the virtual mirror model of the liquid cooling plate is generated by the processing module 2 according to mechanical parameters such as the shape, size and coolant channel size of the liquid cooling plate. The processing module 2 divides the liquid cooling plate into multiple areas. For example, the liquid cooling plate is divided into a central area, a transition area and an edge area of ​​equal area from the inside to the outside; the processing module 2 marks the stored source position on the virtual mirror model of the liquid cooling plate, and the source positions of different areas are displayed in different colors. For example, the source position of the central area is displayed in pink, the source position of the transition area is displayed in yellow, and the source position of the edge area is displayed in blue; the leakage point of the liquid cooling plate is highlighted in red so that the driver or maintenance personnel of the car can clearly observe the leakage point of the liquid cooling plate and take timely countermeasures.

[0052] Continue to refer Figure 2 、 Figure 3 This embodiment also provides a liquid cooling plate leakage detection system, including a pressure detection module 1, a processing module 2, and three or more acoustic emission signal detection modules 3. The processing module 2 is provided with a computer program, and executing the computer program can implement the leakage detection method of steps S3 to S6.

[0053] In this embodiment, the pressure detection module 1 is arranged at the liquid inlet and outlet of the liquid cooling plate, and is used to collect the pressure difference data of the liquid inlet and outlet of the liquid cooling plate in real time. The pressure detection module 1 is communicatively connected with the processing module 2; specifically, the pressure detection module 1 in this embodiment includes a pressure difference sensor, and the two test ports of the pressure difference sensor are respectively connected to the liquid inlet and outlet of the liquid cooling plate, and the pressure difference sensor is communicatively connected with the processing module 2.

[0054] The acoustic emission signal detection module 3 is arranged on the surface of the liquid cooling plate and is used to collect the acoustic emission signal of the liquid cooling plate in real time. The acoustic emission signal detection module 3 is communicatively connected to the processing module 2. The three acoustic emission signal detection modules 3 in this embodiment include resonant acoustic emission sensors. The three resonant acoustic emission sensors are arranged far away from each other and are not on the same straight line. The resonant acoustic emission sensors are fixedly installed on the surface of the liquid cooling plate. The contact interface between the detection end of the resonant acoustic emission sensor and the liquid cooling plate is filled with acoustic coupling agent, which can ensure good sound transmission effect. The resonant acoustic emission sensor is communicatively connected to the processing module 2.

[0055] In this embodiment, the liquid cooling plate leakage detection system also includes a display 4. The processing module 2 includes an amplifier 21 and a processor 2. The amplifier 21, the processor 22 and the display 4 are electrically connected in sequence. The amplifier 21 is communicatively connected to the acoustic emission signal detection module 3. The amplifier 21 is used to amplify and filter the acoustic emission signal. The pressure detection module 1 is communicatively connected to the processor 22. The display 4 is used to display the virtual mirror model of the liquid cooling plate and the signal source location information, and highlight the location of the liquid cooling plate leakage point. The vehicle user can quickly identify the area where the leakage point is located and take corresponding treatment measures.

[0056] Thus, the functions of the liquid cooling plate leakage detection system and the leakage detection method in this embodiment are as follows:

[0057] (1) Liquid cooling plate leakage point positioning function

[0058] By setting up a pressure detection module, a processing module and three or more acoustic emission detection modules, the source position of the acoustic emission signal is calculated based on the time difference when the three acoustic emission signal detection modules receive the same frequency acoustic emission signal. Combined with the above-mentioned leakage judgment result, the specific location of the liquid cooling plate leakage point is determined, realizing the leakage point positioning function.

[0059] (2) Liquid cooling plate leakage monitoring function

[0060] By setting up a pressure detection module, the pressure difference between the inlet and outlet of the liquid cooling plate is collected in real time. The processing module determines whether the liquid cooling plate is leaking by comparing it with the preset pressure difference threshold, thus realizing the real-time monitoring function of the liquid cooling plate leakage.

[0061] (3) Source location visualization function

[0062] Through the display and the liquid cooling plate virtual mirror model, the driver or maintenance personnel of the car can directly view the signal source position distribution area in the liquid cooling plate virtual mirror model through the display, realizing the signal source position visualization function.

[0063] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to realize and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A method for detecting liquid leakage, characterized in that: The liquid leakage detection method comprises: Step S1: The pressure detection module collects the pressure difference between the inlet and outlet of the liquid cooling plate in real time; Step S2: three or more acoustic emission signal detection modules collect acoustic emission signals on the surface of the liquid cooling plate in real time; In step S3, the processing module determines whether the pressure difference between the inlet and outlet of the liquid cooling plate exceeds a preset pressure difference threshold based on the data collected by the pressure detection module, so as to determine whether the liquid cooling plate is leaking. If it is determined that the liquid cooling plate is leaking, the result of the liquid cooling plate leakage and the time when the processing module received the pressure difference between the inlet and outlet are combined and stored. Step S4, the processing module is used to store the frequency and time of the acoustic emission signal collected by the acoustic emission signal detection module, calculate the source position of the acoustic emission signal of the frequency on the liquid cooling plate according to the time difference of the acoustic emission signals of the same frequency received by any three acoustic emission signal detection modules that are not in the same straight line, and merge and store the source position and the earliest receiving time of the acoustic emission signal of the frequency; In step S5, the processing module compares the storage time of the result of the liquid cooling plate leakage with the storage time of the signal source positions of each frequency, and extracts the signal source position of a frequency closest to its storage time as the liquid cooling plate leakage point position.

2. A liquid leakage detection method according to claim 1, characterized in that: The preset pressure difference threshold in step S3 is set according to the upper limit of the pressure difference between the inlet and outlet of the liquid cooling plate at different water pump speeds when the automobile liquid cooling system is in normal working condition.

3. A liquid leakage detection method according to claim 1, characterized in that: The method for calculating the information source position in step S4 includes: The propagation speed of the acoustic emission signal in the liquid cooling plate can be measured by a sound velocity meter and is a constant v; A rectangular coordinate system is established on the surface of the liquid cooling plate, and the source position of the acoustic emission signal of the i-th frequency is set to (X i , Y i ), let the storage time of the source position of the acoustic emission signal of the i-th frequency be T i ; Select any three acoustic emission signal detection modules that are not in the same straight line. The first acoustic emission signal detection module is located at (x i1 ,y i1 ), the time when the first acoustic emission signal detection module receives the acoustic emission signal of this frequency is T i1 ; The second acoustic emission signal detection module is located at (x i2 ,y i2 ), the time when the second acoustic emission signal detection module receives the acoustic emission signal of this frequency is T i2 ; The third acoustic emission signal detection module is located at (x i3 ,y i3 The time when the third acoustic emission signal detection module receives the acoustic emission signal of the frequency is T i3 ; Then the storage time of the source position of the acoustic emission signal of the i-th frequency is T i =min(T i1 , T i2 , T i3 ); Then we can set up a set of equations to solve the source position of the acoustic emission signal of the i-th frequency: Solve the above equations for X i and Y i , we can get the source position of the acoustic emission signal of the i-th frequency (X i , Y i ).

4. A liquid leakage detection method according to claim 1, characterized in that: The process also includes step S6: establishing a virtual mirror model of the liquid cooling plate, wherein the processing module marks the source positions corresponding to the acoustic emission signals of each frequency on the virtual mirror model of the liquid cooling plate, and highlights the positions of the leakage points of the liquid cooling plate.

5. A liquid cooling plate leakage detection system, characterized in that: The device comprises a pressure detection module, a processing module, and three or more acoustic emission signal detection modules, wherein the pressure detection module and the acoustic emission signal detection module are respectively communicated with the processing module, and the processing module is provided with a computer program, and when the computer program is executed by the processing module, the steps of the liquid leakage detection method according to any one of claims 1 to 4 are implemented.

6. The liquid cooling plate leakage detection system according to claim 5, characterized in that: The pressure detection module includes a pressure differential sensor, two test ports of the pressure differential sensor are respectively connected to the liquid inlet and the liquid outlet of the liquid cooling plate, and the pressure differential sensor is communicatively connected to the processing module.

7. The liquid cooling plate leakage detection system according to claim 5, characterized in that: The acoustic emission signal detection modules are provided in three modules, and the acoustic emission signal detection modules are arranged on the surface of the liquid cooling plate. The three acoustic emission signal detection modules are far away from each other and are not on the same straight line.

8. The liquid cooling plate leakage detection system according to claim 7, characterized in that: The acoustic emission signal detection module includes a resonant acoustic emission sensor, which is fixedly mounted on the surface of the liquid cooling plate. The contact interface between the detection end of the resonant acoustic emission sensor and the liquid cooling plate is filled with an acoustic coupling agent. The resonant acoustic emission sensor is communicatively connected to the processing module.

9. The liquid cooling plate leakage detection system according to claim 5, characterized in that: The processing module includes an amplifier and a processor. The amplifier is electrically connected to the processor. The amplifier is communicatively connected to the acoustic emission signal detection module. The pressure detection module is communicatively connected to the processor.

10. The liquid cooling plate leakage detection system according to claim 9, characterized in that: A display is also included, and the display is electrically connected to the processor.

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