Solar cell welding quality inspection system

Abstract

The utility model provides a solar cell welding quality inspection system which comprises an image shooting device, an EL detection device and a display terminal, and the image shooting device and the EL detection device are both in signal connection with the display terminal. The image shooting device is used for acquiring a surface image of the to-be-detected battery. The EL detection device is used for obtaining the EL detection result of the battery to be detected. And the display terminal is used for synchronously displaying the surface image of the battery to be detected and the EL detection result. According to the solar cell welding quality inspection system, existing operators in an EL detection process are ingeniously utilized, and full inspection and timely treatment of defective products are realized while no operators are additionally arranged, so that the problems of false detection and missing detection which often exist in the traditional technology are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field especially relates to a solar cell welding quality inspection system. BACKGROUND

[0002] The photovoltaic module is the core device in the photovoltaic power generation system. A plurality of solar cell pieces are usually encapsulated in the photovoltaic module, and the solar cell pieces are connected in series and parallel. Correspondingly, in the production process of the photovoltaic module, a process of electrically connecting a plurality of solar cell pieces to form a cell string by using conductive material (for example, a welding strip) is usually involved, which is called lap welding. After the lap welding process, visual inspection equipment is usually used to inspect the welding quality of the battery to be detected. Due to the inspection accuracy of the visual inspection equipment, misjudgment often occurs during the inspection process, resulting in defective products continuing to flow to subsequent production processes.

[0003] In the traditional technology, in order to control the problem of defective product flow caused by misjudgment, manual sampling inspection is usually used to prevent batch defects, or defective product tracking is performed after the defective product flow occurs. However, these methods cannot achieve 100% inspection in actual operation, and there is still a problem of missed defective products, and it is also difficult to timely handle the problem of defective product flow caused by misjudgment. UTILITY MODEL CONTENT

[0004] Therefore, in view of the problems in the background art, the present disclosure provides a solar cell welding quality inspection system, which can achieve sufficient inspection and timely handling of defective products without adding operating personnel.

[0005] The present disclosure provides a solar cell welding quality inspection system, which comprises an image acquisition device, an EL detection device and a display terminal, and the image acquisition device and the EL detection device are signal connected to the display terminal.

[0006] The image acquisition device is used to acquire the surface image of the battery to be detected.

[0007] The EL detection device is used to perform EL detection on the battery to be detected and acquire the EL detection result of the battery to be detected.

[0008] The display terminal is used to synchronously display the surface image and the EL detection result of the battery to be detected.

[0009] In some embodiments of the present disclosure, the solar cell welding quality inspection system further comprises an image storage medium, which is signal connected to the image acquisition device and the display terminal, and is used to receive and store the surface images acquired by the image acquisition device.

[0010] In some embodiments of the present disclosure, the solar cell to be detected has a mark code, and the solar cell welding quality inspection system further comprises a mark code recognition device for recognizing the mark code, which is signal connected to the display terminal, and the display terminal is used to display the corresponding surface images in the image storage medium according to the mark code recognized by the mark code recognition device.

[0011] In some embodiments of the present disclosure, the solar cell welding quality inspection system has an EL station before lamination, and the display terminal and the mark code recognition device are both arranged at the EL station before lamination.

[0012] In some embodiments of the present disclosure, the image storage medium is signal connected to the display terminal through a data transmission line; and / or,

[0013] The EL detection device is signal connected to the display terminal through a data transmission line.

[0014] In some embodiments of the present disclosure, an image analysis device is further included, which is signal connected to the image acquisition device, and is used to detect whether the solar cell to be detected is qualified according to the surface images.

[0015] In some embodiments of the present disclosure, the image acquisition device is selected from a CMOS camera or a CCD camera.

[0016] In some embodiments of the present disclosure, the EL detection device comprises an infrared camera, which is used to take images of the solar cell to be detected during EL test as the EL detection result.

[0017] In some embodiments of the present disclosure, the solar cell welding quality inspection system further comprises a conveying device, which is used to convey the solar cell to be detected.

[0018] In some embodiments of the present disclosure, the image acquisition device is arranged before the EL detection device on the conveying path of the conveying device.

[0019] The solar cell welding quality inspection system of the present disclosure is provided with an image capturing device, an EL detection device and a display terminal, and the image capturing device and the EL detection device are both signal connected to the display terminal. This enables the display terminal to synchronously display the surface image of the to-be-detected cell and the EL detection result. The original operator can check the surface image of the to-be-detected cell while monitoring the EL detection result. The solar cell welding quality inspection system ingeniously utilizes the existing operator in the EL detection process, realizes sufficient inspection and timely processing of defective products without adding operators, thereby avoiding the false detection and missed detection problems often existing in the traditional technology. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of a solar cell welding quality inspection system.

[0021] In the drawings, the reference signs and their meanings are as follows:

[0022] 110, image capturing device; 120, EL detection device; 130, display terminal; 140, image storage medium; 150, mark code recognition device; 160, image analysis device; 200, to-be-detected cell; 300, transmission device; 310, image capturing station; 320, pre-lamination EL station; 330, EL detection station. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present application, the present application will be described more comprehensively in combination with the embodiments and effect diagrams. The embodiments give the preferred embodiments of the present application. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more comprehensive and thorough.

[0024] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly fixed to the other element or can be fixed to the other element through an intermediate element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intermediate element between the two elements. In addition, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, or it can be detachable connection, or it can be integrated connection. For example, it can be mechanical connection, or it can be electrical connection. For example, it can be direct connection, or it can be indirect connection through an intermediate element, or it can be internal communication between two elements. It should be understood that those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances, and no ambiguity will be caused.

[0025] Unless otherwise defined, all terms used in disclosing the application, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. All publications, patent applications, patents, and other references mentioned in this specification are herein incorporated by reference in their entirety for the purpose of describing and disclosing, for example, the compositions and methodologies which are described in such publications, which describe and enable such compositions and methodologies. Any discussion of prior art throughout the specification should in no way be considered as an admission that such prior art is widely available or formed part of the common general knowledge in the field.

[0026] Unless otherwise defined, all terms used in disclosing the application, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. All publications, patent applications, patents, and other references mentioned in this specification are herein incorporated by reference in their entirety for the purpose of describing and disclosing, for example, the compositions and methodologies which are described in such publications, which describe and enable such compositions and methodologies. Any discussion of prior art throughout the specification should in no way be considered as an admission that such prior art is widely available or formed part of the common general knowledge in the field.

[0027] As set forth in the background, the artificial sampling inspection mode is difficult to achieve 100% inspection, and there may be a problem of missing detection of defective products. Moreover, the sampling inspection mode and the defective traceability mode are difficult to timely handle the defective problems. A conventional improvement mode proposes to increase the frequency of sampling inspection to reduce the above-mentioned missing detection problem, but this is still difficult to achieve 100% inspection and still consumes a large amount of human resources.

[0028] To solve the problem, the present disclosure provides a solar cell welding quality inspection system, which comprises an image acquisition device, an EL detection device and a display terminal, and the image acquisition device and the EL detection device are both signal connected to the display terminal. The image acquisition device is used to acquire the surface image of the to-be-detected cell. The EL detection device is used to perform EL detection on the to-be-detected cell and acquire the EL detection result of the to-be-detected cell. The display terminal is used to synchronously display the surface image and the EL detection result of the to-be-detected cell.

[0029] In the existing production process, after the solar cell piece is welded to form a to-be-detected cell, it often needs to undergo electroluminescence (EL) testing. During the EL testing, the EL detection result is usually displayed in real time on a display terminal, and the operating personnel monitors the EL detection result of each to-be-detected cell in real time through the display terminal to ensure that the to-be-detected cell with a qualified EL detection result is screened out.

[0030] This disclosed solar cell welding quality inspection system includes an image acquisition device, an EL detection device, and a display terminal, with both the image acquisition device and the EL detection device connected to the display terminal. This allows the display terminal to simultaneously display the surface image of the cell under inspection and the EL detection results. Existing operators can simultaneously monitor the EL detection results and verify the surface image of the cell under inspection. This solar cell welding quality inspection system cleverly utilizes existing operators in the EL detection process, achieving thorough inspection and timely handling of defective products without adding additional operators, thus avoiding the false detection and missed detection problems often found in traditional technologies.

[0031] In addition, operators can simultaneously observe surface images and EL test results, and combine the surface images and EL test results to make a comprehensive judgment on the quality of the battery under test, which is conducive to obtaining more accurate judgment results.

[0032] Figure 1 This is a schematic diagram of the structure of a solar cell welding quality inspection system disclosed herein, with reference to... Figure 1 As shown, the solar cell welding quality inspection system includes an image acquisition device 110, an EL detection device 120, and a display terminal 130. Both the image acquisition device 110 and the EL detection device 120 are signal-connected to the display terminal 130. The image acquisition device 110 is used to acquire a surface image of the cell 200 to be inspected. The EL detection device 120 is used to perform EL detection on the cell 200 to be inspected and acquire the EL detection results. The display terminal 130 is used to simultaneously display the surface image and EL detection results of the cell 200 to be inspected. Figure 1 The dashed line in the diagram is used to indicate a signal connection between two devices or apparatuses.

[0033] The cell under test 200 is formed by welding multiple solar cells to a conductive material (such as solder strip). The cell under test 200 may include multiple solar cells, and may also include at least one of solder strip and busbar. This solar cell welding quality inspection system can be installed after the welding equipment to inspect the cell under test 200 formed by the welding equipment.

[0034] In this embodiment, when the display terminal 130 displays, the surface image and the EL detection result can be displayed simultaneously on the same interface, or they can be displayed sequentially on the same interface, or they can be displayed on two different interfaces respectively. This disclosure does not make any special limitation in this regard.

[0035] Reference Figure 1 As shown, as an example of this embodiment, the solar cell welding quality inspection system also includes a transmission device 300, which is used to transmit the cell 200 to be inspected.

[0036] As further examples of this embodiment, the conveying device 300 can include, but is not limited to, a conveyor belt. In other examples, the conveying device 300 can also include a robot arm.

[0037] Referring to Figure 1 As further examples of this embodiment, the image capturing device 110 is disposed before the EL detecting device 120 on the conveying path of the conveying device 300.

[0038] Referring to Figure 1 As further examples of this embodiment, the conveying path of the battery 200 to be detected has an image capturing station 310 and an EL detecting station 330 disposed in sequence. When the battery 200 to be detected is located at the image capturing station 310, the image capturing device 110 can acquire the surface image of the battery 200 to be detected. When the battery 200 to be detected is located at the EL detecting station 330, the EL detecting device 120 can acquire the EL detection result of the battery 200 to be detected.

[0039] As examples of this embodiment, the display terminal 130 can be a display, which can be, but is not limited to, a liquid crystal display, an organic light-emitting diode display, or a quantum dot light-emitting diode display.

[0040] As examples of this embodiment, the image capturing device 110 is selected from a CMOS camera or a CCD camera. The CMOS camera or the CCD camera can be used to take a surface optical photo of the battery 200 to be detected, which can be used as the surface image.

[0041] As examples of this embodiment, the EL detecting device 120 includes an infrared camera, which is used to take an image of the battery 200 to be detected during EL testing as the EL detection result. It can be understood that the battery 200 to be detected usually needs to be connected to an external circuit during EL testing. The external circuit supplies power to the battery 200 to be detected and causes the carriers to recombine and emit light in the battery 200 to be detected. The emitted light is mainly in the infrared band. At this time, the infrared camera is used for shooting, which can obtain the image of the battery 200 to be detected during EL testing.

[0042] In addition, in the EL process, the front and back of the battery 200 to be detected can also be photographed, and a visual analysis method can be used to evaluate whether there is a significant defect on the surface of the battery 200 to be detected during EL testing. Although the front and back of the battery 200 to be detected are also photographed in the EL process, the visual analysis in the EL process cannot specifically analyze whether the welding quality is qualified, and the pictures taken in the EL process also cannot show the welding details, so it is difficult to be used to judge the welding quality.

[0043] As an example of this embodiment, the EL detection device 120 is signal connected to the display terminal 130 through a data transmission line. At this time, the EL detection device 120 can directly transmit the acquired EL detection result to the display terminal 130 and display it on the display terminal 130.

[0044] In this embodiment, the signal connection mode of the image capturing device 110 and the display terminal 130 can be direct connection or indirect connection. The direct connection means that the image capturing device 110 and the display terminal 130 are signal connected without the aid of a relay medium, which is mostly used to realize real-time signal transmission. The indirect connection means that the image capturing device 110 and the display terminal 130 are signal connected with the aid of a relay medium, which can be used to analyze and process the surface image or store the surface image.

[0045] Referring to Figure 1 As an example of this embodiment, the solar cell welding quality inspection system further comprises an image storage medium 140, which is signal connected to the image capturing device 110 and the display terminal 130, and is used to receive and store the surface image acquired by the image capturing device 110. It can be understood that when the display terminal 130 displays the EL detection result, the display terminal 130 is also used to read the surface image stored in the image storage medium 140, so as to synchronously display the surface image of the to-be-detected cell 200 and the EL detection result.

[0046] In this example, the image storage medium 140 is arranged to temporarily store the surface image of the to-be-detected cell 200, so that the step of acquiring the surface image of the to-be-detected cell 200 and the step of acquiring the EL detection result can be performed in sequence. This is beneficial to more flexibly setting the actual positions of the image capturing device 110 and the EL detection device 120 and the detection time.

[0047] As a further example of this embodiment, the image capturing device 110 is indirectly signal connected to the display terminal 130 through the image storage medium 140.

[0048] As an example of this embodiment, the image storage medium 140 is signal connected to the display terminal 130 through a data transmission line.

[0049] As an example of this embodiment, the image capturing device 110 can be signal connected to the image storage medium 140 through a data transmission line.

[0050] In actual production process, usually a plurality of to-be-detected cells 200 are sequentially subjected to EL detection, at this time, it is also necessary to ensure that the EL detection result and the surface image displayed on the display terminal 130 belong to the same to-be-detected cell 200. In order to solve this problem, referring to Figure 1As shown, as an example of this embodiment, the battery to be detected 200 has a mark code, which is one-to-one corresponding to the battery to be detected 200. The solar cell welding quality inspection system further comprises a mark code recognition device 150 for recognizing the mark code, and the mark code recognition device 150 is signal connected to the display terminal 130, and the display terminal 130 is used for displaying the corresponding surface image in the image storage medium 140 according to the mark code recognized by the mark code recognition device 150.

[0051] In this example, the mark code is arranged on the battery to be detected 200, and the mark code recognition device 150 is arranged in the solar cell welding quality inspection system. In actual use, before the EL detection of the battery to be detected 200, the mark code recognition device 150 can be used to recognize the mark code of the battery to be detected 200, and then the display terminal 130 retrieves and displays the corresponding surface image according to the mark code recognized by the mark code recognition device 150, and the EL detection result is also transmitted to the display terminal 130, so as to ensure that the EL detection result and the surface image displayed by the display terminal 130 belong to the same battery to be detected 200.

[0052] Referring to Figure 1 As an example of this embodiment, the solar cell welding quality inspection system has an EL station before lamination 320, and the display terminal 130 and the mark code recognition device 150 are arranged at the EL station before lamination 320.

[0053] The operator is usually located at the EL station before lamination 320. In this example, the display terminal 130 and the mark code recognition device 150 are arranged at the EL station before lamination 320, which is convenient for the operator to directly operate the mark code recognition device 150 to recognize the arriving battery to be detected 200, and the display terminal 130 displays the surface image and the EL detection result of the battery to be detected 200, which is beneficial to simplify the work content of the operator.

[0054] As a further example of this embodiment, the mark code of the battery to be detected 200 can be a bar code or a two-dimensional code. Correspondingly, the mark code recognition device 150 can be a bar code recognizer or a two-dimensional code recognizer.

[0055] As a further example of this embodiment, the solar cell welding quality inspection system further comprises an image analysis device 160, which is signal connected to the image acquisition device 110, and the image analysis device 160 is used for detecting whether the battery to be detected 200 is qualified according to the surface image. The image analysis device 160 can be a computer, and the computer is provided with a program for realizing the analysis of the surface image and giving a judgment result.

[0056] In this example, the image analysis device 160 is used to pre-judge whether the battery 200 to be detected is qualified, so that the operator only needs to recheck the surface image, which is beneficial to improve the work efficiency of the operator.

[0057] In combination Figure 1 As shown in the drawings, the solar cell welding quality inspection system of the present disclosure can operate according to the following steps. First, the battery 200 to be detected is transported to the image acquisition station 310, at which time the image acquisition device 110 is started and the surface image of the battery 200 to be detected is acquired. The acquired surface image is transmitted to the image analysis device 160, which performs artificial intelligence analysis on the battery 200 to be detected to preliminarily judge whether the battery 200 to be detected is qualified, and if it is qualified, the transportation of the battery 200 to be detected continues. The surface image is temporarily stored in the image storage medium 140. Then, the battery 200 to be detected is transported to the pre-lamination EL station 320, and the operator operates the marking code recognition device 150 to recognize the identification code of the battery 200 to be detected, and the display terminal 130 acquires the surface image thereof from the image storage medium 140 and displays it. The battery 200 to be detected continues to be transported to the EL detection station 330, and the EL detection device 120 acquires the EL detection result thereof and displays it on the display terminal 130. In this way, the display terminal 130 can synchronously display the surface image and the EL detection result of the battery 200 to be detected, so that the operator can recheck the surface image of the battery 200 to be detected while observing the EL detection result, thereby achieving sufficient inspection and timely processing of defective products. Since the operator at the pre-lamination EL station 320 is originally present on the production line, no additional operator is needed.

[0058] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not conflict, they should be considered within the scope of the present disclosure.

[0059] The above embodiments only express several implementation manners of the present disclosure, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present utility model patent. It should be noted that for those skilled in the art, without departing from the concept of the present disclosure, some modifications and improvements can be made, which are all within the protection scope of the present disclosure. Therefore, the protection scope of the present utility model patent should be subject to the appended claims.

Claims

1. A solar cell welding quality inspection system, characterized in that, it comprises an image capturing device (110), an EL detection device (120) and a display terminal (130), the image capturing device (110) and the EL detection device (120) are both signal connected to the display terminal (130); the image capturing device (110) is used to acquire a surface image of a to-be-detected cell (200); the EL detection device (120) is used to perform EL detection on the to-be-detected cell (200) and acquire an EL detection result of the to-be-detected cell (200); the display terminal (130) is used to synchronously display the surface image and the EL detection result of the to-be-detected cell (200); the solar cell welding quality inspection system further comprises an image storage medium (140), the image storage medium (140) is signal connected to the image capturing device (110) and the display terminal (130), and the image storage medium (140) is used to receive and store the surface image acquired by the image capturing device (110); the to-be-detected cell (200) is formed after a plurality of solar cell pieces are welded with a conductive material; the to-be-detected cell (200) has a mark code, the mark code corresponds to the to-be-detected cell (200) in one-to-one correspondence; the solar cell welding quality inspection system further comprises a mark code recognition device (150) used to recognize the mark code, the mark code recognition device (150) is signal connected to the display terminal (130), and the display terminal (130) is used to display the corresponding surface image in the image storage medium (140) according to the mark code recognized by the mark code recognition device (150).

2. The solar cell solder quality inspection system of claim 1, wherein, The solar cell welding quality inspection system has a pre-lamination EL station (320), and the display terminal (130) and the mark code recognition device (150) are both arranged at the pre-lamination EL station (320).

3. The solar cell solder quality inspection system of claim 1, wherein, The image storage medium (140) is signal connected to the display terminal (130) through a data transmission line; and / or, the EL detection device (120) is signal connected to the display terminal (130) through a data transmission line.

4. The solar cell solder quality inspection system according to any one of claims 1 to 3, characterized by It further comprises an image analysis device (160), the image analysis device (160) is signal connected to the image capturing device (110), and the image analysis device (160) is used to detect whether the to-be-detected cell (200) is qualified according to the surface image.

5. The solar cell solder quality inspection system according to any one of claims 1 to 3, characterized by The image capturing device (110) is selected from a CMOS camera or a CCD camera.

6. The solar cell solder quality inspection system according to any one of claims 1 to 3, characterized by The EL detection device (120) comprises an infrared camera, and the infrared camera is used to shoot an image of the to-be-detected cell (200) during EL testing as the EL detection result.

7. The solar cell solder quality inspection system according to any one of claims 1 to 3, characterized by The solar cell welding quality inspection system further comprises a conveying device (300), and the conveying device (300) is used to convey the to-be-detected cell (200).

8. The solar cell solder quality inspection system of claim 7, wherein, The image pickup device (110) is disposed before the EL detection device (120) on a transmission path of the transmission device (300).

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