A multi-angle microcrack detection mechanism for solar cells

Abstract

This utility model discloses a multi-angle microcrack detection mechanism for solar cells, comprising a detection frame, a first driving component, a detection component, and a support platform. The support platform is located below the detection frame and is used to support the solar cells to be tested. The detection component is used to perform microcrack detection on the solar cells located on the support platform. The first driving component is disposed on the detection frame and is used to drive the detection component to rotate sequentially at multiple angles, so as to cooperate with the detection end of the detection component to perform microcrack detection on the solar cells on the support platform at multiple angles. Through the cooperation of the first driving component and the detection component, the above-mentioned multi-angle microcrack detection mechanism allows for detection of solar cells at various angles, resulting in good detection performance.

Description

Technical Field

[0001] This utility model belongs to the field of battery cell testing technology, and in particular relates to a multi-angle microcrack detection mechanism for battery cells. Background Technology

[0002] As solar energy gradually becomes an important part of new energy sources, the quality and reliability of photovoltaic (PV) modules have received great attention. Microcracks are a problem discovered in recent years during the operation of PV power plants. Crystalline silicon modules, due to their inherently fragile crystal structure and the trend towards thinner crystalline silicon cells, are less resistant to mechanical damage and more prone to microcracks. Microcracks in modules reduce their efficiency, reliability, and lifespan, and even the stability of the entire PV system.

[0003] Research results indicate that 50% of failed solar cells originate from microcracks parallel to the main busbars. The efficiency loss from a 45° tilted crack is one-quarter that of a crack parallel to the main busbars. Furthermore, simulations of power loss from multiple defective cells within the module show that the failure area of ​​the cell significantly impacts power loss. Simulations of cell failure areas ranging from 5% to 50% reveal a significant increase in module power loss. However, simulations showing that increasing the number of microcracked cells only results in a slow increase in power loss. Therefore, studying the characteristics and impact of microcracks is of great significance for module production and operation.

[0004] Currently, when detecting microcracks in solar cells, a specific microcrack detection mechanism is typically used. Existing microcrack detection mechanisms include a detection frame, a detection component, and a support platform. The detection component is set on the detection frame and located directly above the support platform, with its detection port facing downwards to detect the solar cells on the support platform. However, existing detection components are fixedly set on the detection frame, making it impossible to detect solar cells from various angles, resulting in poor detection performance, which urgently needs to be addressed. Utility Model Content

[0005] The purpose of this invention is to provide a multi-angle microcrack detection mechanism for battery cells to solve the problems mentioned in the background art.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A multi-angle microcrack detection mechanism for solar cells includes a detection frame, a first drive assembly, a detection assembly, and a support platform, wherein:

[0008] The support platform is located below the testing frame and is configured to support the battery cell to be tested. The testing component is mounted on the testing frame and located directly above the support platform. The testing component is configured to perform microcrack detection on the battery cell located on the support platform.

[0009] The first driving component is disposed on the testing frame, and the driving end of the first driving component is connected to the testing component. The first driving component is configured to drive the testing component to rotate sequentially at multiple angles, so as to cooperate with the testing end of the testing component to perform testing on the battery cells on the carrier platform at multiple angles.

[0010] Furthermore, the first drive assembly includes an adjustment drive element and an adjustment lever, wherein:

[0011] The detection component is mounted on the adjusting rod, the fixed end of the adjusting drive is mounted on the detection frame, and the driving end of the adjusting drive is connected to the adjusting rod. The adjusting drive drives the adjusting rod to move by a preset angle, thereby causing the detection component to rotate by a preset angle.

[0012] Furthermore, the first driving component includes a guiding unit, which includes two guide plates. Both guide plates are mounted on the detection frame and are located at both ends of the adjusting rod. Each guide plate has an upwardly protruding guide groove in the middle. Both ends of the adjusting rod are installed in the corresponding guide grooves. The adjusting driving component, in conjunction with the guide grooves at both ends, drives the adjusting rod to move, thereby driving the detection component to move.

[0013] Furthermore, the multi-angle microcrack detection mechanism for solar cells also includes a second drive component. The second drive component is disposed on the detection frame, and the drive end of the second drive component is connected to the first drive component. The second drive component is configured to drive the first drive component to move up and down, so as to cooperate with the first drive component to drive the detection component to move up and down.

[0014] Furthermore, the second drive assembly includes a lifting drive component and a lifting plate. The lifting plate is movably mounted on the detection frame. The first drive assembly is mounted on the lifting plate. The fixed end of the lifting drive component is mounted on the detection frame. The driving end of the lifting drive component is connected to the lifting plate. The lifting drive component drives the first drive assembly to move up and down through the lifting plate, thereby driving the detection assembly to move up and down.

[0015] Furthermore, the lifting plate is equipped with an encoder, which is electrically connected to the lifting drive component. The encoder is configured to monitor the lifting position information of the lifting plate and transmit the position information to the lifting drive component, thereby cooperating with the lifting drive component to control the height of the lifting plate.

[0016] Compared with existing technologies, the beneficial effects of the multi-angle microcrack detection mechanism for solar cells are as follows:

[0017] With the cooperation of the first driving component and the detection component, the detection component performs microcrack detection on the battery cell located on the support platform. The first driving component drives the detection component to rotate at multiple angles in sequence, and the detection end of the detection component performs detection on the battery cell on the support platform at multiple angles. It can perform detection on the battery cell at various angles, and the detection effect is good.

[0018] 2) By opening guide grooves on the guide plate, adjusting the driving component in conjunction with the guide grooves at both ends to drive the adjusting rod to move, thereby driving the generating module to move. This not only has a simple structure and ingenious design, but also facilitates multi-angle detection of the battery cells.

[0019] 3) The movement of the lifting plate is controlled by an encoder, and the detection angle of the ultrasonic transmitting probe and ultrasonic receiving probe is changed by changing the height of the lifting plate, which further improves the detection effect. Attached Figure Description

[0020] To more clearly illustrate and understand the technical solutions in the embodiments of this utility model, the accompanying drawings used in the background technology and embodiment description of this utility model will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0021] Figure 1 This is a front view schematic diagram of the multi-angle microcrack detection mechanism for battery cells provided in this embodiment of the utility model;

[0022] Figure 2 This is a side view schematic diagram of the multi-angle microcrack detection mechanism for battery cells provided in this embodiment of the utility model;

[0023] Figure 3 yes Figure 1 Enlarged view of point A in the middle;

[0024] Figure 4 yes Figure 1 Enlarged diagram of point B in the middle. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] To facilitate understanding of this utility model, a more complete description of it will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Please see Figures 1 to 4As shown, in this embodiment, a multi-angle microcrack detection mechanism for battery cells includes a detection frame 1, a first driving assembly 2, a generating module 3, a data analysis module 4, and a support platform 5. The support platform 5 is located below the detection frame 1 and is configured to support the battery cell 50 to be tested. The generating module 3 is mounted on the detection frame 1 and located directly above the support platform 5. The generating module 3 includes several ultrasonic transmitting probes 30 with their transmitting ends facing downwards and several ultrasonic receiving probes 31 with their receiving ends facing downwards. Each ultrasonic receiving probe 31 corresponds to one ultrasonic transmitting probe 30. The ultrasonic transmitting probes 30 are configured to emit ultrasonic signals to the surface of the battery cell 50 located on the support platform 5, and the ultrasonic receiving probes 31 are configured to receive ultrasonic signals from the surface of the battery cell 50 located on the support platform 5. The ultrasonic signal emitted from the surface of the battery cell 50 is transmitted to the data analysis module 4, which is mounted on the testing frame 1. The data analysis module 4 is configured to store the information received by the ultrasonic receiving probe 31 and fit the points that change based on the waveform echo time and amplitude of the ultrasonic signal to form an image of the microcracks in the battery cell 50. The first drive assembly 2 is mounted on the testing frame 1 and its drive end is connected to the generating module 3. The first drive assembly 2 is configured to drive the generating module 3 to rotate at multiple angles in sequence, so that the transmitting end of the ultrasonic transmitting probe 30 and the receiving end of the ultrasonic receiving probe 31 rotate synchronously at a preset angle, thereby detecting the battery cell 50 on the support platform 5 at multiple angles.

[0028] As can be seen, through the cooperation of the first driving component 2, the generating module 3, and the data analysis module 4, the ultrasonic transmitting probe 30 emits ultrasonic signals to the surface of the battery cell 50, and the ultrasonic receiving probe 31 receives the ultrasonic signals emitted after passing through the surface of the battery cell 50 and transmits the signals to the data analysis module 4. The data analysis module 4 stores the information received by the ultrasonic receiving probe 31 and fits the points that change according to the waveform echo time and amplitude of the ultrasonic signal to form an image of the hidden crack in the battery cell 50. It can detect the battery cell 50 from various angles and has a good detection effect.

[0029] It should be noted that the multi-angle microcrack detection mechanism for battery cells provided in this embodiment can perform detection on battery cells 100 from 0° to 180°.

[0030] Please see Figure 2 As shown, in one embodiment, the generating module 3 can perform detection on the surface of the battery cell 50 from 0° to 90°.

[0031] In one embodiment, the first driving assembly 2 includes an adjusting drive component 20 and an adjusting rod 21, wherein: each ultrasonic transmitting probe 30 and its corresponding ultrasonic receiving probe 31 are spaced apart on the adjusting rod 21, the fixed end of the adjusting drive component 20 is mounted on the detection frame 1, and the driving end of the adjusting drive component 20 is connected to the adjusting rod 21. The adjusting drive component 20 drives the adjusting rod 21 to move by a preset angle, thereby causing the ultrasonic transmitting probe 30 and the ultrasonic receiving probe 31 to rotate.

[0032] In one embodiment, the first drive assembly 2 includes a guide unit, which includes two guide plates 22. Both guide plates 22 are mounted on the detection frame 1 and are located at both ends of the adjusting rod 21. Each guide plate 22 has an upwardly protruding guide groove 220 in the middle. Both ends of the adjusting rod 21 are installed in the corresponding guide groove 220. The adjusting drive component 20 works with the guide grooves 220 at both ends to drive the adjusting rod 21 to move, thereby driving the generating module 3 to move.

[0033] As can be seen, by opening guide grooves 220 on guide plate 22, adjusting drive component 20 cooperates with guide grooves 220 at both ends to drive adjustment rod 21 to move, thereby driving generation module 3 to move. This not only has a simple structure and ingenious design, but also facilitates multi-angle detection of battery cell 50.

[0034] Specifically, there are two adjustment drive components 20, which are respectively located at both ends of the adjustment rod 21. The driving end of the adjustment drive component 20 is connected to the adjustment rod 21 through a "Z"-shaped transmission rod 23.

[0035] In one embodiment, the multi-angle microcrack detection mechanism for solar cells also includes a second drive component 6. The second drive component 6 is mounted on the detection frame 1. The drive end of the second drive component 6 is connected to the first drive component 2. The second drive component 6 is configured to drive the first drive component 2 to move up and down, so as to cooperate with the first drive component 2 to drive the generation module 3 to move up and down.

[0036] In one embodiment, the second drive assembly 6 includes a lifting drive component 60 and a lifting plate 61. The lifting plate 61 is movably mounted on the detection frame 1. The first drive assembly 2 is mounted on the lifting plate 61. The fixed end of the lifting drive component 60 is mounted on the detection frame 1. The driving end of the lifting drive component 60 is connected to the lifting plate 61. The lifting drive component 60 drives the first drive assembly 2 to move up and down through the lifting plate 61, thereby driving the generator module 3 to move up and down.

[0037] In one implementation, an encoder 7 is provided on the lifting plate 61. The encoder 7 is electrically connected to the lifting drive 60. The encoder 7 is configured to record and analyze the lifting position information of the lifting plate 61 and transmit the position information to the lifting drive 60, thereby cooperating with the lifting drive 60 to control the height of the lifting plate 61.

[0038] It can be seen that by controlling the movement of the lifting plate 61 through the encoder 7, the detection angle of the ultrasonic transmitting probe 30 and the ultrasonic receiving probe 31 can be changed by changing the height of the lifting plate 61, thereby further improving the detection effect.

[0039] Specifically, the adjustment drive component 20 uses a drive motor, and the lifting drive component 60 uses a drive cylinder.

[0040] During the multi-angle microcrack detection mechanism for the aforementioned battery cells, the process is as follows: First, a person or a robotic arm places the battery cell 50 to be tested on the support platform 5. The ultrasonic transmitting probe 30 emits ultrasonic signals to the surface of the battery cell 50 located on the support platform 5. The ultrasonic receiving probe 31 receives the ultrasonic signals emitted after passing through the surface of the battery cell 50 and transmits the signals to the data analysis module 4. The data analysis module 4 stores the information received by the ultrasonic receiving probe 31 and fits the points that change according to the waveform echo time and amplitude of the ultrasonic signal to form an image of the microcracks in the battery cell 50. Then, the adjusting drive 20 drives the adjusting rod 21 to move within the guide grooves 220 at both ends, causing the ultrasonic transmitting probe 30 and the ultrasonic receiving probe 31 to rotate, so as to detect the battery cell 50 at different detection angles. Finally, the lifting drive 60 drives the lifting plate 61 to descend and, together with the ultrasonic transmitting probe 30 and the ultrasonic receiving probe 31, detects the battery cell 50 and further adjusts the detection angle.

[0041] It should be noted that by activating the ultrasonic transmitting probe 30, ultrasonic waves are emitted at an angle onto the solar cell 50. The ultrasonic waves are reflected by the solar cell 50 to the ultrasonic receiving probe 31. The data analysis module 4 stores the received ultrasonic waveform and records the echo time and amplitude. The data analysis module 4 fits the points where the amplitude changes in the ultrasonic echo waveform. The fitted image represents the state of the crack in the solar cell 50 and can roughly determine the location of the crack. By changing the frequency of the ultrasonic waves, different types of cracks in the solar cell 50 can be detected. Different crack states have different effects on the solar cell 50; therefore, it is necessary to test different types of intact solar cells 50 beforehand and record the data for comparison.

[0042] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above examples. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-angle hidden crack detection mechanism for battery pieces, characterized in that, The multi-angle microcrack detection mechanism for solar cells includes a detection frame, a first drive assembly, a detection assembly, and a support platform, wherein: The support platform is located below the testing frame and is configured to support the battery cell to be tested. The testing component is mounted on the testing frame and located directly above the support platform. The testing component is configured to perform microcrack detection on the battery cell located on the support platform. The first driving component is disposed on the testing frame, and the driving end of the first driving component is connected to the testing component. The first driving component is configured to drive the testing component to rotate sequentially at multiple angles, so as to cooperate with the testing end of the testing component to perform testing on the battery cells on the carrier platform at multiple angles.

2. The multi-angle concealment crack detection mechanism for battery piece according to claim 1, characterized in that, The first drive assembly includes an adjustment drive element and an adjustment lever, wherein: The detection component is mounted on the adjusting rod, the fixed end of the adjusting drive is mounted on the detection frame, and the driving end of the adjusting drive is connected to the adjusting rod. The adjusting drive drives the adjusting rod to move by a preset angle, thereby causing the detection component to rotate by a preset angle.

3. The multi-angle concealment crack detection mechanism of the battery piece according to claim 2, characterized in that, The first driving component includes a guiding unit, which includes two guide plates. Both guide plates are mounted on the detection frame and are located at both ends of the adjusting rod. Each guide plate has an upwardly protruding guide groove in the middle. Both ends of the adjusting rod are installed in the corresponding guide grooves. The adjusting drive component works with the guide grooves at both ends to drive the adjusting rod to move, thereby driving the detection component to move.

4. The multi-angle concealment crack detection mechanism for battery piece according to claim 1, characterized in that, The multi-angle microcrack detection mechanism for solar cells also includes a second drive component, which is disposed on the detection frame. The drive end of the second drive component is connected to the first drive component, and the second drive component is configured to drive the first drive component to move up and down, so as to cooperate with the first drive component to drive the detection component to move up and down.

5. The multi-angle concealment crack detection mechanism of the battery piece according to claim 4, characterized in that, The second drive assembly includes a lifting drive component and a lifting plate. The lifting plate is movably mounted on the testing frame. The first drive assembly is mounted on the lifting plate. The fixed end of the lifting drive component is mounted on the testing frame. The driving end of the lifting drive component is connected to the lifting plate. The lifting drive component drives the first drive assembly to move up and down through the lifting plate, thereby driving the testing assembly to move up and down.

6. The multi-angle concealment crack detection mechanism of the battery piece according to claim 5, characterized in that, An encoder is provided on the lifting plate, and the encoder is electrically connected to the lifting drive component. The encoder is configured to monitor the lifting position information of the lifting plate and transmit the position information to the lifting drive component, thereby cooperating with the lifting drive component to control the height of the lifting plate.

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