Packaging seal performance test system for photovoltaic packaging members

Abstract

The present application belongs to the technical field of photovoltaic packaging component performance test, and is a packaging sealing performance test system for photovoltaic packaging components, comprising a basic check output unit, a preliminary analysis and determination unit, a packaging sealing test unit, a pressure control stability evaluation unit and a test management terminal; the necessity degree of the photovoltaic packaging component for the packaging sealing performance test is reasonably judged by the preliminary analysis and determination unit, unnecessary tests are avoided to save manpower and resources, when the sealing low-risk signal is generated, the waterproof air permeation condition of the photovoltaic packaging component is tested by simulating the high humidity and pressure conditions in the actual use environment to provide quantitative basis for the sealing performance evaluation, the pressure control stability of the circulating pressure pump is evaluated by monitoring the pressure control, when the pressure control abnormal signal is generated, the test process is suspended according to the need and corresponding improvement measures are made, the test result accuracy is significantly improved and the test supervision difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic packaging component performance testing, in particular to a packaging sealing performance testing system for a photovoltaic packaging component. BACKGROUND

[0002] A photovoltaic packaging component refers to a component for packaging photovoltaic cells, glass, back plates and other materials together to form a photovoltaic module with power generation function. The packaging of the photovoltaic module is crucial for protecting the cells, improving the mechanical strength of the module, prolonging the service life and ensuring the power generation efficiency. Poor packaging sealing will lead to the intrusion of external factors such as moisture and humidity, thereby affecting the performance and service life of the photovoltaic cells.

[0003] At present, when testing the packaging sealing performance of a photovoltaic packaging component, it is difficult to combine the necessity analysis of the test with the automatic test evaluation analysis of the sealing performance to improve the test efficiency and ensure the accuracy of the test results. Moreover, the test process cannot be comprehensively and effectively monitored and the abnormal conditions cannot be reasonably fed back. The test manager has difficulty in suspending the test process in time and taking corresponding improvement measures, which is not conducive to improving the accuracy of the test results and reducing the difficulty of test supervision.

[0004] In view of the above technical defects, a solution is proposed. SUMMARY

[0005] The present application aims to provide a packaging sealing performance testing system for a photovoltaic packaging component, which solves the problem that the prior art is difficult to combine the necessity analysis of the test with the automatic test evaluation analysis of the sealing performance to improve the test efficiency and ensure the accuracy of the test results, and cannot comprehensively and effectively monitor the test process and reasonably feed back abnormal conditions, which is not conducive to improving the accuracy of the test results and reducing the difficulty of test supervision.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The packaging sealing performance testing system for a photovoltaic packaging component comprises a basic inspection output unit, a preliminary analysis and determination unit, a packaging sealing performance testing unit, a pressure control stability evaluation unit and a test management terminal. The basic inspection output unit is used to collect the surface image of the photovoltaic sealing component and send the surface image of the photovoltaic sealing component to the preliminary analysis and determination unit. The preliminary analysis and determination unit preliminarily judges the sealing hidden danger of the photovoltaic sealing component based on the surface image of the photovoltaic sealing component, generates a high sealing hidden danger signal or a low sealing hidden danger signal accordingly, and sends the high sealing hidden danger signal or the low sealing hidden danger signal to the test management terminal.

[0008] The photovoltaic packaging component is tested for encapsulation sealing performance by the encapsulation sealing test unit when generating the sealing low-risk signal, and the encapsulation sealing performance of the photovoltaic packaging component is judged after the test is completed, and the encapsulation sealing performance judgment result is sent to the test management terminal; the pressure control stability evaluation unit controls and monitors the circulating pressure pump, evaluates the pressure control stability of the circulating pressure pump, and generates a pressure control qualified signal or a pressure control abnormal signal, and sends the pressure control qualified signal or the pressure control abnormal signal to the test management terminal.

[0009] Further, the test steps of the encapsulation sealing test unit are as follows:

[0010] Fix the sample: fix the photovoltaic packaging component on the glue layer test stand, so that the sample remains stable during the test;

[0011] Put into the pressure gas chamber: put the fixed sample into the pressure gas chamber, wherein the pressure gas chamber is a sealed space for simulating the air pressure condition in the actual use environment and conducting waterproof gas permeation test;

[0012] Inject humidity gas: inject humidity gas with a humidity of 80% into the test gas storage tank;

[0013] Start the circulating pressure pump: start the circulating pressure pump, the circulating pressure pump extracts humidity gas from the test gas storage tank, and continuously inputs humidity gas with pressure into the pressure gas chamber, and the pressure is controlled between 1.5×10 5 Pa and 2.0×10 5 Pa;

[0014] Observe and record the value: after running for thirty minutes, collect the humidity value in the sealed test chamber connected with the pressure gas chamber, and record the humidity value difference before and after the test;

[0015] Determine the performance: determine the encapsulation sealing performance of the photovoltaic packaging component according to the size of the humidity value difference.

[0016] Further, when determining the performance, if the humidity value difference is less than or equal to the preset humidity value difference threshold, it is determined that the encapsulation sealing performance of the photovoltaic packaging component is qualified; if the humidity value difference is greater than the preset humidity value difference threshold, it is determined that the encapsulation sealing performance of the photovoltaic packaging component is unqualified.

[0017] Further, the specific judgment process of the preliminary analysis and judgment unit includes:

[0018] Based on the surface image of the photovoltaic packaging component to identify the cracks on the surface of the photovoltaic packaging component, if there are cracks on the surface of the photovoltaic packaging component, a sealing high-risk signal is generated;

[0019] If there is no crack on the surface of the photovoltaic packaging component, bubbles on the glass and backplane bonding surface of the colloid are identified based on the surface image of the photovoltaic packaging component, and if there is no bubble on the glass and backplane bonding surface of the colloid, a sealing low-risk signal is generated.

[0020] Further, if there is a bubble on the glass and backplane bonding surface of the colloid, the volume of the corresponding bubble is collected and marked as a bubble occupied space value, and the bubble occupied space value is compared with a preset bubble occupied space threshold value, if the bubble occupied space value exceeds the preset bubble occupied space threshold value, the corresponding bubble is marked as a hidden bubble.

[0021] If there is a hidden bubble on the glass and backplane bonding surface of the colloid, a sealing high-risk signal is generated; if there is no hidden bubble on the glass and backplane bonding surface of the colloid, the number of bubbles on the glass and backplane bonding surface of the colloid is collected and marked as a bubble number detection value, and the area ratio of the bubble distribution on the glass and backplane bonding surface of the colloid is marked as a bubble distribution value. The bubble number detection value and the bubble distribution value are compared with the preset bubble number detection threshold value and the preset bubble distribution threshold value respectively, if the bubble number detection value or the bubble distribution value exceeds the corresponding preset threshold value, a sealing high-risk signal is generated; if the bubble number detection value and the bubble distribution value do not exceed the corresponding preset threshold value, a sealing low-risk signal is generated.

[0022] Further, the specific analysis process of the pressure control stability evaluation unit includes:

[0023] The pressure curve of the humidity gas output by the circulating pressure pump in unit time is obtained, and the pressure curve is placed in the first quadrant of the rectangular coordinate system, and the starting point of the pressure curve is located on the Y axis; wherein the X axis of the rectangular coordinate system represents time, and the Y axis represents pressure.

[0024] In the first quadrant of the rectangular coordinate system, two upper and lower rays parallel to the X axis and with endpoints on the Y axis are drawn, and the Y axis coordinate value corresponding to the upper ray is 2.0x10 5 Pa, and the Y axis coordinate value corresponding to the lower ray is 1.5x10 5 Pa; and the upper and lower rays are defined as the first ray and the second ray respectively;

[0025] The Y-direction length value of the pressure curve not between the first ray and the second ray is obtained and marked as a pressure control deviation duration value, and the pressure control deviation duration value is compared with a preset pressure control deviation duration threshold value, if the pressure control deviation duration value exceeds the preset pressure control deviation duration threshold value, a pressure control abnormal signal is generated.

[0026] Further, if the pressure control deviation duration value does not exceed the preset pressure control deviation duration threshold, the part of the pressure curve above the first ray and the area enclosed by the first ray, and the part of the pressure curve below the second ray and the area enclosed by the second ray are marked as pressure deviation areas;

[0027] The area of the corresponding pressure deviation area is obtained and marked as a pressure deviation surface detection value. The pressure deviation surface detection values of all pressure deviation areas are summed to obtain a pressure deviation total detection value. The pressure deviation surface detection value is compared with a preset pressure deviation surface detection threshold value. If the pressure deviation surface detection value exceeds the preset pressure deviation surface detection threshold value, the corresponding pressure deviation area is marked as a pressure risk area. The number of pressure risk areas is obtained and marked as a pressure risk detection value.

[0028] The pressure control deviation duration value, the pressure deviation total detection value, and the pressure risk detection value are weighted and summed to obtain a pressure control stability abnormality coefficient. The pressure control stability abnormality coefficient is compared with a preset pressure control stability abnormality coefficient threshold value. If the pressure control stability abnormality coefficient exceeds the preset pressure control stability abnormality coefficient threshold value, a pressure control abnormality signal is generated. If the pressure control stability abnormality coefficient does not exceed the preset pressure control stability abnormality coefficient threshold value, a pressure control qualified signal is generated.

[0029] Further, the pressure control stability evaluation unit is communicatively connected to the component posture monitoring evaluation unit. The pressure control stability evaluation unit sends the pressure control qualified signal to the component posture monitoring evaluation unit. The component posture monitoring evaluation unit analyzes the posture condition of the photovoltaic packaging component when receiving the pressure control qualified signal. An abnormal posture signal or a qualified posture signal is generated through analysis, and the abnormal posture signal or the qualified posture signal is sent to the test management terminal.

[0030] Further, the specific analysis process of the component posture monitoring evaluation unit is as follows:

[0031] In the test process, the posture image of the photovoltaic packaging component is obtained in real time. The current posture image is compared with the standard posture image before the test to obtain a posture coincidence rate. The posture coincidence rate is compared with a preset posture coincidence rate threshold value. If the posture coincidence rate exceeds the preset posture coincidence rate threshold value, a posture bad symbol ZY-1 is assigned.

[0032] The number of times of the posture bad symbol ZY-1 in a unit time is obtained and marked as a posture bad detection value, and the posture coincidence rate in a unit time is averaged to obtain a posture performance evaluation value, and the posture bad detection value and the posture performance evaluation value are compared with a preset posture bad detection threshold and a preset posture performance evaluation threshold, if the posture bad detection value exceeds the preset posture bad detection threshold or the posture performance evaluation value does not exceed the preset posture performance evaluation threshold, a posture abnormal signal is generated, if the posture bad detection value does not exceed the preset posture bad detection threshold and the posture performance evaluation value exceeds the preset posture performance evaluation threshold, a posture qualified signal is generated.

[0033] Further, when the posture qualified signal is generated, the vibration amplitude and the vibration frequency of the photovoltaic packaging component are collected, and the vibration amplitude and the vibration frequency are respectively compared with a preset vibration amplitude threshold and a preset vibration frequency threshold, if the vibration amplitude or the vibration frequency exceeds the corresponding preset threshold, it is judged that the photovoltaic packaging component is in a vibration hidden danger state;

[0034] The total length of time in a unit time that the photovoltaic packaging component is in a vibration hidden danger state is obtained and marked as a vibration hidden danger time, and the average value of the vibration amplitude and the average value of the vibration frequency in a unit time are respectively marked as amplitude characteristic value and vibration frequency characteristic value;

[0035] The posture influence coefficient is calculated by weighted summation of the vibration hidden danger time, the amplitude characteristic value and the vibration frequency characteristic value, and the posture influence coefficient is compared with a preset posture influence coefficient threshold, if the posture influence coefficient exceeds the preset posture influence coefficient threshold, a posture influence alarm signal is generated, and the posture influence alarm signal is sent to the test management terminal.

[0036] Compared with the prior art, the beneficial effects of the present application are:

[0037] 1、In the present application, the necessity of testing the sealing performance of the photovoltaic packaging component is reasonably judged to avoid unnecessary testing and waste of manpower and resources, and when the low hidden danger signal is generated, the waterproof air permeation condition of the photovoltaic packaging component is tested by simulating the high humidity and pressure conditions in the actual use environment, and a quantitative basis is provided for the sealing performance evaluation, and the pressure control of the circulating pressure pump is monitored and the pressure control stability is evaluated, and when the pressure control abnormal signal is generated, the test process is suspended according to the need and corresponding improvement measures are taken, which significantly improves the accuracy of the test results and reduces the difficulty of test supervision;

[0038] 2、In the application, the posture condition of the photovoltaic packaging component is analyzed by the component posture monitoring and evaluation unit when the voltage control qualified signal is received, the adverse effect degree of the vibration condition on maintaining the posture is accurately evaluated when the posture qualified signal is generated, the test process is suspended as needed when the posture abnormal signal or the posture influence alarm signal is generated, the test abnormality is avoided, and the test stability and the test result accuracy are avoided, the intelligent level is high, and the test supervision difficulty is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to facilitate the understanding of those skilled in the art, the application will be further described below in conjunction with the drawings;

[0040] Figure 1 The system block diagram of the first embodiment in the application is shown in the figure;

[0041] Figure 2 The system block diagram of the second embodiment and the third embodiment in the application is shown in the figure. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the application will be described clearly and completely below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0043] Embodiment one: as shown in the figure, the packaging sealing performance test system for the photovoltaic packaging component provided by the application includes a basic inspection output unit, a preliminary analysis and determination unit, a packaging sealing performance test unit, a voltage control stability evaluation unit and a test management terminal. Figure 1

[0044] Among them, the basic inspection output unit is used for collecting the surface image of the photovoltaic sealing component, and the surface image of the photovoltaic sealing component is sent to the preliminary analysis and determination unit; the preliminary analysis and determination unit preliminarily judges the sealing hidden danger of the photovoltaic sealing component based on the surface image of the photovoltaic sealing component, and generates a sealing high hidden danger signal or a sealing low hidden danger signal accordingly;

[0045] And the sealing high hidden danger signal or the sealing low hidden danger signal is sent to the test management terminal, which can reasonably judge the necessity degree of the packaging sealing performance test of the photovoltaic packaging component, remind the test management personnel not to perform the sealing performance test of the corresponding photovoltaic packaging component when the sealing high hidden danger signal is generated, and avoid unnecessary test and waste of manpower and material resources; the specific judgment process of the preliminary analysis and determination unit is as follows:

[0046] ​Based on the surface image of the photovoltaic packaging component to identify the cracks on the surface of the photovoltaic packaging component. If there are cracks on the surface of the photovoltaic packaging component, it indicates that there is a high risk of the sealing performance of the photovoltaic packaging component. It is meaningless to test the sealing performance of the photovoltaic packaging component, and a high-risk sealing signal is generated.

[0047] If there are no cracks on the surface of the photovoltaic packaging component, bubbles are identified on the glass and backboard bonding surface of the adhesive based on the surface image of the photovoltaic packaging component. If there are no bubbles on the glass and backboard bonding surface of the adhesive, it indicates that there is a high risk of the sealing performance of the photovoltaic packaging component. It is meaningless to test the sealing performance of the photovoltaic packaging component, and a low-risk sealing signal is generated.

[0048] Further, if there are bubbles on the glass and backboard bonding surface of the adhesive, the volume of the corresponding bubble is collected and marked as a bubble-occupied space value. The bubble-occupied space value is compared with a preset bubble-occupied space threshold value. If the bubble-occupied space value exceeds the preset bubble-occupied space threshold value, it indicates that the corresponding bubble has a greater adverse effect on the sealing performance of the photovoltaic packaging component. The corresponding bubble is marked as a risk bubble.

[0049] If there are risk bubbles on the glass and backboard bonding surface of the adhesive, a high-risk sealing signal is generated. If there are no risk bubbles on the glass and backboard bonding surface of the adhesive, the number of bubbles on the glass and backboard bonding surface of the adhesive is collected and marked as a bubble number detection value, and the area ratio of the bubbles on the glass and backboard bonding surface of the adhesive is marked as a bubble distribution value.

[0050] The bubble number detection value and the bubble distribution value are compared with the preset bubble number detection threshold value and the preset bubble distribution threshold value, respectively. If the bubble number detection value or the bubble distribution value exceeds the corresponding preset threshold value, it indicates that there is a high risk of the sealing performance of the photovoltaic packaging component. It is meaningless to test the sealing performance of the photovoltaic packaging component, and a high-risk sealing signal is generated. If the bubble number detection value and the bubble distribution value do not exceed the corresponding preset threshold value, it indicates that there is a small risk of the sealing performance of the photovoltaic packaging component. The sealing performance test can be performed, and a low-risk sealing signal is generated.

[0051] When the low-risk sealing signal is generated, the photovoltaic packaging component is tested for the sealing performance by the packaging sealing performance test unit. After the test is completed, the sealing performance of the photovoltaic packaging component is judged, and the sealing performance judgment result is sent to the test management terminal. By simulating the high humidity and pressure conditions in the actual use environment, the waterproof and air permeation of the photovoltaic packaging component is tested, and a quantitative basis is provided for the sealing performance evaluation. The sealing performance of the photovoltaic packaging component is effectively tested, the test efficiency is improved, and the accuracy of the sealing performance evaluation result is improved. The specific test steps are as follows:

[0052] Fixing the sample: fixing the photovoltaic packaging component on the adhesive layer test stand to keep the sample stable during the test, prevent it from moving or deforming due to external force or air pressure changes, facilitate the smooth progress of the test process and ensure the accuracy of the test results;

[0053] Put into the pressure chamber: put the fixed sample into the pressure chamber, wherein the pressure chamber is a sealed space used to simulate the air pressure conditions in the actual use environment and conduct water vapor permeation testing, i.e., testing and evaluating the sealing performance of the photovoltaic packaging component;

[0054] Inject humidity gas: inject humidity gas with a humidity of 80% into the test gas storage tank. This step is to simulate a high-humidity environment, which is one of the important conditions for testing the water vapor permeation performance of the photovoltaic packaging component;

[0055] Start the circulating pressure pump: start the circulating pressure pump to work. The circulating pressure pump extracts humidity gas from the test gas storage tank and continuously inputs humidity gas with pressure into the inner cavity of the pressure chamber, and the pressure is controlled between 1.5x10 5 Pa and 2.0x10 5 Pa; this step is to simulate the air pressure changes in actual use and test the sealing performance of the photovoltaic packaging component under pressure conditions;

[0056] Observe and record the value: after running for thirty minutes, collect the humidity value in the sealed test chamber connected to the pressure chamber, and record the difference in humidity value before and after the test. This step is to quantify the amount of water vapor permeation of the photovoltaic packaging component under specific time and pressure conditions;

[0057] Determine the performance: determine the sealing performance of the photovoltaic packaging component according to the size of the humidity value difference. If the humidity value difference is less than or equal to the preset humidity value difference threshold, the sealing performance of the photovoltaic packaging component is determined to be qualified. If the humidity value difference is greater than the preset humidity value difference threshold, the sealing performance of the photovoltaic packaging component is determined to be unqualified.

[0058] The pressure control stability evaluation unit monitors the pressure control of the circulating pressure pump to evaluate the pressure control stability of the circulating pressure pump, generates a pressure control qualified signal or a pressure control abnormal signal, and sends the pressure control qualified signal or the pressure control abnormal signal to the test management terminal. When the test management terminal receives the pressure control abnormal signal, it issues a corresponding warning to remind the test management personnel to pause the test process as needed, timely investigate and analyze the causes and take appropriate improvement measures to ensure the stability of the output gas pressure, further improve the accuracy of the test results, and significantly reduce the test supervision difficulty. The specific analysis process of the pressure control stability evaluation unit is as follows:

[0059] The pressure curve of the humidity gas output by the circulating pressure pump per unit time is obtained, and the pressure curve is placed in the first quadrant of a rectangular coordinate system, and the starting point of the pressure curve is located on the Y-axis; wherein, the X-axis of the rectangular coordinate system represents time, and the Y-axis represents pressure;

[0060] In the first quadrant of the rectangular coordinate system, two upper and lower rays parallel to the X-axis and with endpoints on the Y-axis are drawn, and the Y-axis coordinate value corresponding to the upper ray is 2.0*10 5 Pa, and the Y-axis coordinate value corresponding to the lower ray is 1.5*10 5 Pa; and the upper and lower rays are defined as the first ray and the second ray, respectively;

[0061] The Y-direction length value of the pressure curve not between the first ray and the second ray is obtained and marked as a pressure control deviation duration value, the pressure control deviation duration value is compared with a preset pressure control deviation duration threshold value, if the pressure control deviation duration value exceeds the preset pressure control deviation duration threshold value, it indicates that the control condition of the circulating pressure pump for the gas output pressure is poor, which is not conducive to ensuring the stability of the test process and the accuracy of the test result, and a pressure control abnormal signal is generated.

[0062] Further, if the pressure control deviation duration value does not exceed the preset pressure control deviation duration threshold value, the part of the pressure curve above the first ray and the area enclosed by the first ray and the part of the pressure curve below the second ray and the area enclosed by the second ray are marked as a pressure deviation area;

[0063] The area of the corresponding pressure deviation area is obtained and marked as a pressure deviation area detection value, the pressure deviation area detection values of all pressure deviation areas are summed to obtain a pressure deviation total detection value, and the pressure deviation area detection value is compared with a preset pressure deviation area detection threshold value, if the pressure deviation area detection value exceeds the preset pressure deviation area detection threshold value, the corresponding pressure deviation area is marked as a pressure risk area; the number of pressure risk areas is obtained and marked as a pressure risk detection value;

[0064] The pressure control deviation duration value, the pressure deviation total detection value and the pressure risk detection value are weighted and summed to obtain a pressure control stability abnormality coefficient; the pressure control deviation duration value, the pressure deviation total detection value and the pressure risk detection value are respectively assigned corresponding preset weight coefficients, the pressure control deviation duration value, the pressure deviation total detection value and the pressure risk detection value are respectively multiplied by the corresponding preset weight coefficients, and the sum of the three groups of product results is marked as the pressure control stability abnormality coefficient; and the larger the value of the pressure control stability abnormality coefficient, the worse the control condition of the circulating pressure pump for the gas output pressure, and the more difficult it is to ensure the stability of the test process and the accuracy of the test result;

[0065] The pressure control stability anomaly coefficient is compared with the preset pressure control stability anomaly coefficient threshold. If the pressure control stability anomaly coefficient exceeds the preset pressure control stability anomaly coefficient threshold, it indicates that the control of the gas output pressure by the circulating pressure pump is poor, which is not conducive to ensuring the stability of the test process and the accuracy of the test results, and a pressure control anomaly signal is generated. If the pressure control stability anomaly coefficient does not exceed the preset pressure control stability anomaly coefficient threshold, it indicates that the control of the gas output pressure by the circulating pressure pump is good, which is conducive to ensuring the stability of the test process and the accuracy of the test results, and a pressure control qualified signal is generated.

[0066] Example 2: Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the pressure control stability evaluation unit is connected to the component attitude monitoring and evaluation unit. The pressure control stability evaluation unit sends the pressure control qualified signal to the component attitude monitoring and evaluation unit. When the component attitude monitoring and evaluation unit receives the pressure control qualified signal, it analyzes the attitude status of the photovoltaic encapsulation component and generates an attitude abnormal signal or attitude qualified signal during the test process through analysis.

[0067] Furthermore, it sends either an abnormal attitude signal or a qualified attitude signal to the test management terminal. Upon receiving an abnormal attitude signal, the test management terminal issues a corresponding warning to remind test management personnel to suspend the test process as needed and adjust the fixation status of the photovoltaic sealing component to ensure its fixation effect. This avoids test abnormalities or affects test stability and accuracy due to attitude changes, further reducing the difficulty of testing and supervising photovoltaic sealing components, demonstrating a high level of intelligence. It should be noted that the specific analysis process of the component attitude monitoring and evaluation unit is as follows:

[0068] During the test, the attitude image of the photovoltaic packaging component is acquired in real time. The current attitude image is compared with the standard attitude image before the test to obtain the attitude overlap rate. The attitude overlap rate is compared with the preset attitude overlap rate threshold. If the attitude overlap rate exceeds the preset attitude overlap rate threshold, it indicates that the current attitude of the photovoltaic packaging component is significantly different from the attitude standard requirements, and the attitude defect symbol ZY-1 is assigned.

[0069] The number of times the posture defect symbol ZY-1 is assigned within a unit time is obtained and marked as the posture defect detection value. The average value of all posture overlap rates within a unit time is calculated to obtain the posture performance evaluation value. The posture defect detection value and the posture performance evaluation value are numerically compared with the preset posture defect detection threshold and the preset posture performance evaluation threshold.

[0070] If the posture bad detection value exceeds the preset posture bad detection threshold or the posture performance evaluation value does not exceed the preset posture performance evaluation threshold, it indicates that the posture of the photovoltaic packaging component in unit time is unstable, which is not conducive to ensuring the smooth progress of the test process and the accuracy of the test result, and a posture abnormal signal is generated; if the posture bad detection value does not exceed the preset posture bad detection threshold and the posture performance evaluation value exceeds the preset posture performance evaluation threshold, it indicates that the posture of the photovoltaic packaging component in unit time is relatively stable, and a posture qualified signal is generated.

[0071] Embodiment three: as shown in the embodiment, the difference between the embodiment and embodiment one and embodiment two is that when the posture qualified signal is generated, the vibration amplitude and the vibration frequency of the photovoltaic packaging component are collected, and the vibration amplitude and the vibration frequency of the photovoltaic packaging component are compared with the preset vibration amplitude threshold and the preset vibration frequency threshold respectively, if the vibration amplitude or the vibration frequency exceeds the corresponding preset threshold, it is judged that the photovoltaic packaging component is in a vibration hidden danger state; Figure 2 The total length of time that the photovoltaic packaging component is in a vibration hidden danger state in unit time is obtained and marked as the vibration hidden danger length, and the average value of the vibration amplitude and the average value of the vibration frequency in unit time are marked as the amplitude characteristic value and the frequency characteristic value respectively;

[0072] The posture influence coefficient is calculated by weighted summation of the vibration hidden danger length, the amplitude characteristic value and the frequency characteristic value; the corresponding preset weight coefficients are respectively assigned to the vibration hidden danger length, the amplitude characteristic value and the frequency characteristic value, the vibration hidden danger length, the amplitude characteristic value and the frequency characteristic value are respectively multiplied by the corresponding preset weight coefficients, and the sum of the three groups of product results is marked as the posture influence coefficient; and the larger the value of the posture influence coefficient, the more it is not conducive to ensuring the posture stability of the photovoltaic packaging component;

[0073] The posture influence coefficient is compared with the preset posture influence coefficient threshold, if the posture influence coefficient exceeds the preset posture influence coefficient threshold, it indicates that it is not conducive to ensuring the posture stability of the photovoltaic packaging component, a posture influence alarm signal is generated, and the posture influence alarm signal is sent to the test management terminal, when the test management terminal receives the posture influence alarm signal, a warning is issued to remind the test management personnel to suspend the test and re-fix the photovoltaic packaging component according to the need, so as to ensure the posture stability of the photovoltaic packaging component in the test process, thereby reducing the monitoring and management difficulty of the test process.

[0074]

[0075] ​The working principle of the present application is as follows: in use, the surface image of the photovoltaic sealing member is collected by the basic inspection output unit, the preliminary analysis and judgment unit preliminarily judges the sealing hidden danger of the photovoltaic sealing member based on the surface image, can reasonably judge the necessity degree of the encapsulation sealing performance test of the photovoltaic encapsulation member, avoid unnecessary test and waste of manpower and material resources, and when the sealing low hidden danger signal is generated, the waterproof air permeation condition of the photovoltaic encapsulation member is tested by simulating the high humidity and pressure conditions in the actual use environment, and a quantitative basis is provided for the sealing performance evaluation, the sealing performance of the photovoltaic encapsulation member is effectively tested, the test efficiency is improved, the accuracy of the sealing performance evaluation result is improved, the pressure control stability evaluation unit is used for pressure control monitoring and evaluation of the circulating pressure pump, and the pressure control stability is evaluated, when the pressure control abnormal signal is generated, the test process is suspended according to the need and corresponding improvement measures are made, so as to ensure the stability of the output gas pressure, further improve the accuracy of the test result, and significantly reduce the test supervision difficulty.

[0076] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and limit the present application to the specific embodiments. Obviously, many modifications and changes can be made according to the content of the present application. The present application is selected and described in detail, in order to better explain the principles and practical application of the present application, so that the skilled in the art can well understand and utilize the present application. The present application is limited by the claims and their full scope and equivalents.

Claims

1. A system for testing the sealing performance of photovoltaic encapsulation components, characterized in that, It includes a basic inspection output unit, a preliminary analysis and judgment unit, a packaging and sealing test unit, a pressure control stability assessment unit, and a test management terminal. The basic inspection output unit is used to collect surface images of photovoltaic sealing components. The preliminary analysis and judgment unit makes a preliminary judgment on the sealing defects of photovoltaic sealing components based on the surface images of photovoltaic sealing components, and generates a high sealing defect signal or a low sealing defect signal accordingly. When generating a low-risk sealing signal, the sealing performance of the photovoltaic encapsulation component is tested by the encapsulation sealing performance test unit. After the test is completed, the sealing performance is judged and the sealing performance judgment result is sent to the test management terminal. The pressure control stability assessment unit monitors the pressure control of the circulating pressure pump, assesses the pressure control stability of the circulating pressure pump, and generates a pressure control pass signal or a pressure control failure signal accordingly, and sends the pressure control pass signal or pressure control failure signal to the test management terminal. The specific analysis process of the pressure control stability assessment unit is as follows: Obtain the pressure curve of the humid gas output by the circulating pressure pump per unit time, place the pressure curve in the first quadrant of the rectangular coordinate system, draw two rays parallel to the X-axis and with their endpoints located on the Y-axis in the first quadrant of the rectangular coordinate system, and define the upper and lower rays as the first ray and the second ray, respectively; obtain the Y-axis length value of the pressure curve that is not between the first ray and the second ray and mark it as the pressure control deviation time value. If the pressure control deviation time value exceeds the preset pressure control deviation time threshold, a pressure control abnormality signal is generated. If the pressure control deviation time value does not exceed the preset pressure control deviation time threshold, the area enclosed by the part of the pressure curve above the first ray and the first ray, and the area enclosed by the part of the pressure curve below the second ray and the second ray, are marked as pressure deviation areas. The area of ​​the corresponding pressure-displacement region is obtained and marked as the pressure-displacement surface detection value. The pressure-displacement surface detection values ​​of all pressure-displacement regions are summed to obtain the total pressure-displacement detection value. The pressure-displacement surface detection value is compared with the preset pressure-displacement surface detection threshold. If the pressure-displacement surface detection value exceeds the preset pressure-displacement surface detection threshold, the corresponding pressure-displacement region is marked as a pressure-hazard region. The number of pressure-hazard regions is obtained and marked as the pressure-hazard detection value. The pressure control stability anomaly coefficient is calculated by weighted summation of the pressure control deviation time value, the total pressure anomaly detection value, and the pressure risk detection value. The pressure control stability anomaly coefficient is then compared with a preset pressure control stability anomaly coefficient threshold. If the pressure control stability anomaly coefficient exceeds the preset pressure control stability anomaly coefficient threshold, a pressure control anomaly signal is generated; if the pressure control stability anomaly coefficient does not exceed the preset pressure control stability anomaly coefficient threshold, a pressure control qualified signal is generated.

2. The packaging sealing performance testing system for photovoltaic packaging components according to claim 1, characterized in that, The test steps for the hermeticity test unit are as follows: Fix the sample; place it in a pressure chamber; inject humid gas; start the circulating pressure pump; observe and record the values; determine the performance.

3. The packaging sealing performance testing system for photovoltaic packaging components according to claim 2, characterized in that, When judging performance, if the humidity difference is less than or equal to the preset humidity difference threshold, the photovoltaic encapsulation component is judged to have qualified encapsulation sealing performance; if the humidity difference is greater than the preset humidity difference threshold, the photovoltaic encapsulation component is judged to have unqualified encapsulation sealing performance.

4. The packaging sealing performance testing system for photovoltaic packaging components according to claim 1, characterized in that, The specific judgment process of the preliminary analysis and judgment unit includes: Surface images of photovoltaic packaging components are used to identify cracks on the surface of photovoltaic packaging components. If cracks are found on the surface of photovoltaic packaging components, a high risk signal for sealing is generated. If there are no cracks on the surface of the photovoltaic encapsulation component, air bubbles at the interface between the colloid and the glass and backsheet are identified based on the surface image of the photovoltaic encapsulation component. If there are no air bubbles at the interface between the colloid and the glass and backsheet, a low-risk sealing signal is generated.

5. The encapsulation sealing performance testing system for photovoltaic encapsulation components according to claim 4, characterized in that, If there are air bubbles at the interface between the colloid and the glass and back panel, the value of the space occupied by the air bubble is compared with the preset threshold value of the space occupied by the air bubble. If the value of the space occupied by the air bubble exceeds the preset threshold value, the corresponding air bubble is marked as a potential hazard air bubble. If there are potential air bubbles at the interface between the colloid and the glass and backing plate, a high sealing risk signal is generated; if there are no potential air bubbles at the interface between the colloid and the glass and backing plate, the number of air bubbles and the air bubble distribution value are compared with the preset air bubble number threshold and the preset air bubble distribution threshold respectively. If the number of air bubbles or the air bubble distribution value exceeds the corresponding preset threshold, a high sealing risk signal is generated; otherwise, a low sealing risk signal is generated.

6. The packaging sealing performance testing system for photovoltaic packaging components according to claim 1, characterized in that, The pressure-controlled stability assessment unit communicates with the component attitude monitoring and assessment unit. When the component attitude monitoring and assessment unit receives the pressure-controlled qualified signal, it analyzes the attitude status of the photovoltaic encapsulation component and sends the attitude abnormal signal or attitude qualified signal to the test management terminal.

7. The encapsulation sealing performance testing system for photovoltaic encapsulation components according to claim 6, characterized in that, The specific analysis process of the component attitude monitoring and evaluation unit is as follows: During the test, the attitude image of the photovoltaic encapsulation component is acquired in real time. The current attitude image is compared with the standard attitude image before the test to obtain the attitude overlap rate. The attitude overlap rate is compared with the preset attitude overlap rate threshold. If the attitude overlap rate exceeds the preset attitude overlap rate threshold, the attitude defect symbol ZY-1 is assigned. The number of times the posture defect symbol ZY-1 is assigned per unit time is obtained and marked as the posture defect detection value. The average of all posture overlap rates per unit time is calculated to obtain the posture performance evaluation value. The posture defect detection value and the posture performance evaluation value are compared with the preset posture defect detection threshold and the preset posture performance evaluation threshold. If the posture defect detection value exceeds the preset posture defect detection threshold or the posture performance evaluation value does not exceed the preset posture performance evaluation threshold, a posture abnormality signal is generated. If the posture defect detection value does not exceed the preset posture defect detection threshold and the posture performance evaluation value exceeds the preset posture performance evaluation threshold, a posture qualified signal is generated.

8. The encapsulation sealing performance testing system for photovoltaic encapsulation components according to claim 7, characterized in that, When generating a qualified attitude signal, the attitude influence coefficient is calculated by weighting and summing the duration of the vibration hazard, the amplitude characteristic value, and the frequency characteristic value. If the attitude influence coefficient exceeds the preset attitude influence coefficient threshold, an attitude influence alarm signal is generated.

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