Laminating device of photovoltaic cell module

Abstract

The invention provides a laminating device of a photovoltaic cell module, and is applied to the technical field of energy manufacturing. The device comprises a lamination device, an electrical property IV detection device and an EL detection device. The laminating equipment comprises a heating plate; the heating plate is used for heating the photovoltaic cell module to melt a packaging material of the photovoltaic cell module; the electrical property IV detection equipment is used for controlling the voltage applied to the photovoltaic cell module under different illumination and temperature conditions and measuring a corresponding current value to obtain an IV curve; and the EL detection equipment is used for shooting a near-infrared image of the photovoltaic cell module and determining the defect of the module according to the near-infrared image.

Description

Technical Field

[0001] The invention relates to the technical field of energy production, and in particular to a laminating device for a photovoltaic cell assembly. Background Art

[0002] As the world economy is booming, human demand for energy is becoming increasingly strong. The reserves of traditional non-renewable energy sources such as coal, oil, and natural gas are decreasing year by year due to long-term and large-scale exploitation and utilization. In comparison, the emergence of new energy sources such as wind power, hydropower, and solar energy has opened up new paths to cope with energy difficulties. Among them, solar energy is widely loved and respected by the public due to its significant characteristics of being green and clean. Photovoltaic cells, as the key medium for converting solar energy into electrical energy, occupy an important position in the entire energy system. As far as the development direction of photovoltaic cells is concerned, the pursuit of high efficiency, low cost, and ensuring long-term stability are undoubtedly the core indicators, and high efficiency is the primary prerequisite for leading its development.

[0003] In the prior art, in the process of developing high-efficiency photovoltaic cell modules, lamination equipment, electrical performance IV testing equipment and electroluminescence EL testing equipment are required. After the photovoltaic cell module completes the lamination process, electrical performance IV testing and EL damage detection will be carried out immediately, and these three tasks need to be completed by the three types of equipment in coordination.

[0004] However, the solution of using three types of equipment has many disadvantages. First of all, the purchase of these three devices will undoubtedly incur high costs. At the same time, a lot of manpower and material resources are required in the operation and maintenance of the equipment, which consumes considerable operation time and greatly reduces production efficiency. Furthermore, the space occupied by the three devices is quite large, which is undoubtedly a double blow to the production environment where site resources are already tight. What is more serious is that when testing photovoltaic cell modules, they need to be frequently moved and transferred between multiple devices, which significantly increases the risk of hidden cracks or even breakage of solar cells. This has a serious negative impact on the quality and yield rate of photovoltaic cell modules, which is not conducive to the efficient and stable development of the photovoltaic industry. Summary of the invention

[0005] The present invention provides a laminating device for a photovoltaic cell assembly, which is used to solve the problem that the prior art uses three independent devices to manufacture photovoltaic cell assemblies and has many drawbacks.

[0006] The present invention also provides a lamination device for a photovoltaic cell assembly, comprising: a lamination device, an electrical performance IV detection device and an EL detection device; the lamination device comprises a heating plate; the heating plate is used to heat the photovoltaic cell assembly to melt its packaging material; the electrical performance IV detection device is used to control the voltage applied to the photovoltaic cell assembly under different lighting and temperature conditions, and measure the corresponding current value to obtain an IV curve; the EL detection device is used to take a near-infrared image of the photovoltaic cell assembly and determine assembly defects based on the near-infrared image.

[0007] According to a laminating device for a photovoltaic cell assembly provided by the present invention, the laminating equipment also includes a high-temperature resistant high-definition glass plate; the photovoltaic cell assembly is placed on the high-temperature resistant high-definition glass plate, and the surface where the cell sheets of the photovoltaic cell assembly are located faces the high-temperature resistant high-definition glass plate, and the heating plate is placed on the photovoltaic cell assembly; the electrical performance IV detection equipment and the EL detection equipment are arranged below the laminating equipment.

[0008] According to a laminating device for a photovoltaic cell assembly provided by the present invention, when the laminating equipment is a full-automatic laminator, the lower high-temperature cloth of the full-automatic laminator is a high-definition transparent cloth.

[0009] According to a laminating device for a photovoltaic cell assembly provided by the present invention, the heating plate comprises a first heating plate and a second heating plate, and the first heating plate and the second heating plate are in a hinged connection state; the photovoltaic cell assembly is placed between the first heating plate and the second heating plate, and the electrical performance IV detection equipment and the EL detection equipment are arranged above the laminating equipment.

[0010] According to a laminating device for a photovoltaic cell assembly provided by the present invention, when the electrical property IV detection device or the EL detection device is in a working state, the angle between the first heating plate and the second heating plate is greater than 90 degrees.

[0011] According to a lamination device for a photovoltaic cell assembly provided by the present invention, the electrical performance IV detection equipment comprises an IV detection lamp, and the IV detection lamp is used to provide different lighting and temperature conditions.

[0012] According to a lamination device for a photovoltaic cell assembly provided by the present invention, the EL detection device includes an infrared camera, and the infrared camera is used to capture a near-infrared image of the photovoltaic cell assembly.

[0013] According to a laminating device for a photovoltaic cell assembly provided by the present invention, the infrared camera is arranged in the middle of the plurality of IV detection lamps, and the shooting range of the infrared camera completely covers the area to be shot of the photovoltaic cell assembly.

[0014] The laminating device of the photovoltaic cell assembly provided by the present invention can integrate the laminating equipment, the electrical performance IV detection equipment, and the EL detection equipment into a multifunctional integrated equipment, and has the functions of lamination, IV electrical performance detection and EL damage detection at the same time. In this way, it can not only save manpower and operation time, occupy a small space, and reduce the possibility of hidden cracks and fragments of photovoltaic cells, but also understand the electrical performance of the cell assembly and the EL detection situation at any time during the lamination process, which creates favorable conditions for in-depth insight into the electrical performance change law and the hidden crack situation of the cell in the solar cell lamination process, and further provides accurate and reliable data support and decision-making basis for subsequent process improvement and technical optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is one of the structural schematic diagrams of the lamination device of the photovoltaic cell assembly provided by the present invention; Figure 2 This is the second structural schematic diagram of the laminating device of the photovoltaic cell assembly provided by the present invention; Figure 3 This is the third structural schematic diagram of the lamination device of the photovoltaic cell assembly provided by the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0019] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0020] In order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. are used to distinguish the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first", "second", etc. are not limiting the quantity and execution order.

[0021] The embodiments of the present application describe some exemplary embodiments for the purpose of explanation. It should be understood that the present application can be implemented in other ways that are not specifically shown in the drawings.

[0022] like Figure 1 As shown, the embodiment of the present application provides a lamination device 100 for a photovoltaic cell assembly. The lamination device 100 for a photovoltaic cell assembly may include a lamination device 110 , an electrical performance IV detection device 120 , and an EL detection device 130 .

[0023] The laminating device 110 includes a heating plate; the heating plate is used to heat the photovoltaic cell assembly to melt its packaging material.

[0024] Specifically, the photovoltaic cell must first go through a welding process to connect the individual cells to form a unit that can effectively transmit current. After that, the layout and lamination operations are carried out to stack different materials (such as cells, packaging materials, etc.) in a specific order and layout. This prepared photovoltaic cell module is then sent to the laminating equipment to start the lamination process. When the photovoltaic cell module enters the laminating equipment, the first step is to evacuate the vacuum. The main purpose of this step is to extract the air inside the module. After evacuation, the laminating equipment will increase the temperature to a suitable value. This suitable temperature is determined according to the characteristics of the film material used. Different films have different melting temperature ranges. At the same time, the equipment applies high pressure, and under the dual effects of high temperature and high pressure, multiple layers of materials are pressed together. Among them, the film plays a key bonding role in this process. It will melt at high temperature and fill the tiny gaps between materials like glue, so that different materials are tightly combined. After high temperature and high pressure lamination, the film between the materials has well bonded the layers together. When cooled at this time, the film will change from a molten liquid state to a solid state, thereby fixing the relative positions of the various layers of material and stabilizing the structure of the entire component.

[0025] The electrical performance IV detection device 120 is used to control the voltage applied to the photovoltaic cell assembly under different light and temperature conditions, and measure the corresponding current value to obtain an IV curve, that is, a current-voltage curve. The electrical performance IV detection device includes an IV detection lamp, which is used to provide different light and temperature conditions.

[0026] Optionally, the parameters of the photovoltaic cell assembly that can be measured by the electrical performance IV detection equipment include: IV curve, short circuit current, open circuit voltage, peak power, peak power point voltage, current, constant voltage point current, fill factor, conversion efficiency, series resistance and parallel resistance.

[0027] The EL detection device 130 is used to take a near-infrared image of the photovoltaic cell assembly and determine assembly defects based on the near-infrared image.

[0028] Optionally, the EL detection device includes an infrared camera, and the infrared camera is used to capture a near-infrared image of the photovoltaic cell assembly.

[0029] Optionally, the infrared camera is arranged in the middle of the plurality of IV detection lamps, and the shooting range of the infrared camera completely covers the area to be shot of the photovoltaic cell assembly.

[0030] Specifically, the core purpose of EL detection equipment is to detect defects inside photovoltaic cell modules. It works based on the principle of electroluminescence. When a forward bias voltage is applied to the solar cell module, the module will emit infrared light. In this case, the light emitted by a normal module is relatively uniform, while the light emitted by a defective part will be abnormal. By detecting this difference in light emission, problems inside the module can be found.

[0031] Optionally, the defect types that can be tested by the EL inspection equipment include welding black spots, visible cracks, hidden cracks, current levels, battery process defects (broken grids, sintering patterns, pollution), battery raw material pollution, typical cold solder joints, etc. The EL inspection equipment can also detect foreign components, foreign matter, abnormal spacing between cells, welding deviation and other problems.

[0032] Optionally, the laminating equipment also includes a high-temperature resistant high-definition glass plate; the photovoltaic cell assembly is placed on the high-temperature resistant high-definition glass plate, and the surface where the cell sheets of the photovoltaic cell assembly are located faces the high-temperature resistant high-definition glass plate, and the heating plate is placed on the photovoltaic cell assembly; the electrical performance IV detection equipment and the EL detection equipment are arranged below the laminating equipment.

[0033] Specifically, Figure 2 As shown, the photovoltaic cell assembly can be placed on the high-temperature resistant high-definition glass plate 111, and the heating plate 112 can be placed on the photovoltaic cell assembly; when the laminating device 110 is running, the surface where the cell of the photovoltaic cell assembly is located should face the high-temperature resistant high-definition glass plate 111. The electrical performance IV detection device 120 and the EL detection device 130 are arranged below the laminating device. After the heating is completed, the electrical performance IV detection is selected first. In this process, the cylinder is used to control the movement of the probe so that the probe can be pressed on the positive and negative poles of the laminated assembly. By controlling the voltage applied to the photovoltaic assembly and measuring the corresponding current value, a series of voltage-current data points can be obtained. These data points constitute the IV curve of the photovoltaic assembly. When the EL (electroluminescence) detection function is selected, the cylinder is also used to control the probe to press on the positive and negative poles of the laminated assembly. Based on the electroluminescent properties of crystalline silicon. When current passes through crystalline silicon, it emits near-infrared light, and a high-resolution infrared camera is used to capture a near-infrared image of the assembly. Since defective areas will exhibit different luminescence characteristics from normal areas during electroluminescence, by analyzing these near-infrared images, defects inside photovoltaic modules, such as cracks, poor solder joints, and broken cells, can be detected and determined.

[0034] Optionally, when the laminating equipment is a fully automatic laminating machine, the lower high-temperature cloth of the fully automatic laminating machine is a high-definition transparent cloth.

[0035] Specifically, in the operation process of the fully automatic laminator, transmission is a very critical link. It needs to accurately transport the materials to be laminated into the laminator for lamination, and after the lamination is completed, the finished product is smoothly conveyed out. This process requires a reliable transmission component to achieve. The lower high temperature cloth is located at a specific position of the laminator, usually in direct contact with the material to be laminated, and drives the material to move in the laminator through its own movement. The lower high temperature cloth can withstand the high temperature environment when the laminator is working, and at the same time has a certain friction force, which can effectively grasp and convey the material, ensuring the position accuracy and stability of the material in the lamination process. High-definition transparent cloth has good transparency. Using high-definition transparent cloth as the lower high temperature cloth can not only meet the normal transmission needs, but also take into account the use of electrical performance IV detection equipment and EL detection equipment.

[0036] Optionally, the heating plate includes a first heating plate and a second heating plate, the first heating plate and the second heating plate are in a hinged connection state; the photovoltaic cell assembly is placed between the first heating plate and the second heating plate, and the electrical performance IV detection device and the EL detection device are arranged above the lamination device. When the electrical performance IV detection device or the EL detection device is in a working state, the angle between the first heating plate and the second heating plate is greater than 90 degrees.

[0037] Specifically, Figure 3 As shown, the first heating plate 111.1 and the second heating plate 111.2 are in a hinged connection state; the photovoltaic cell assembly is placed between the first heating plate 111.1 and the second heating plate 111.2, and the electrical performance IV detection device 120 and the EL detection device 130 are arranged above the laminating device. When the laminating device is in a heating state, the first heating plate 111.1 and the second heating plate 111.2 are in an overlapping state, and when the electrical performance IV detection device 120 or the EL detection device 130 is in a working state, the angle between the first heating plate 111.1 and the second heating plate 111.2 is greater than 90 degrees.

[0038] In the embodiment of the present application, the lamination equipment, the electrical performance IV detection equipment, and the EL detection equipment can be integrated into a multifunctional integrated equipment, which has the functions of lamination, IV electrical performance detection and EL damage detection. In this way, it can not only save manpower and operation time, occupy less space, and reduce the possibility of hidden cracks and fragments in photovoltaic cells, but also understand the electrical performance of the battery components and the EL detection situation at any time during the lamination process, which creates favorable conditions for in-depth insight into the electrical performance change law and the hidden crack situation of the battery cells in the process of solar cell lamination, and further provides accurate and reliable data support and decision-making basis for subsequent process improvement and technical optimization.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laminating device for a photovoltaic cell assembly, characterized in that: include: Lamination equipment, electrical performance IV testing equipment and EL testing equipment; The laminating device comprises a heating plate; the heating plate is used to heat the photovoltaic cell assembly to melt its packaging material; The electrical performance IV detection equipment is used to control the voltage applied to the photovoltaic cell assembly under different light and temperature conditions, and measure the corresponding current value to obtain an IV curve; The EL detection device is used to take a near-infrared image of the photovoltaic cell assembly and determine assembly defects based on the near-infrared image.

2. The laminating device for photovoltaic cell assembly according to claim 1, characterized in that: The laminating equipment also includes a high-temperature resistant high-definition glass plate; the photovoltaic cell assembly is placed on the high-temperature resistant high-definition glass plate, and the surface where the cell sheets of the photovoltaic cell assembly are located faces the high-temperature resistant high-definition glass plate, and the heating plate is placed on the photovoltaic cell assembly; the electrical performance IV detection equipment and the EL detection equipment are arranged below the laminating equipment.

3. The laminating device for photovoltaic cell assembly according to claim 1, characterized in that: When the laminating equipment is a full-automatic laminating machine, the lower high-temperature cloth of the full-automatic laminating machine is a high-definition transparent cloth.

4. The laminating device for photovoltaic cell assembly according to claim 1, characterized in that: The heating plate includes a first heating plate and a second heating plate, and the first heating plate and the second heating plate are in a hinged connection state; the photovoltaic cell assembly is placed between the first heating plate and the second heating plate, and the electrical performance IV detection equipment and the EL detection equipment are arranged above the lamination equipment.

5. The laminating device for photovoltaic cell assembly according to claim 4, characterized in that: When the electrical property IV detection device or the EL detection device is in a working state, the angle between the first heating plate and the second heating plate is greater than 90 degrees.

6. The laminating device for photovoltaic cell assembly according to claim 1, characterized in that: The electrical property IV detection device comprises an IV detection lamp, and the IV detection lamp is used to provide different lighting and temperature conditions.

7. The laminating device for photovoltaic cell assembly according to claim 6, characterized in that: The EL detection device includes an infrared camera, which is used to capture a near-infrared image of the photovoltaic cell assembly.

8. The laminating device for photovoltaic cell assembly according to claim 7, characterized in that: The infrared camera is arranged in the middle of the plurality of IV detection lamps, and the shooting range of the infrared camera completely covers the area to be shot of the photovoltaic cell assembly.

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