Method for precisely adjusting heating temperature of photovoltaic module

Abstract

The present application is aimed at the local high and low temperature points on the heating plate of the heating device of the photovoltaic module laminator in the prior art, and these temperature points cannot be adjusted by adjusting the heating power, and provides a method for accurately adjusting the heating temperature of the photovoltaic module, which comprises the following steps: arranging a threading hole for threading an electromagnetic wire on the heating plate, arranging the electromagnetic wire in the threading hole, and opening an opening on the surface of the heating plate corresponding to the threading hole along the extension direction of the threading hole, so that the opening is arranged to be perpendicular to the threading hole. The method for accurately adjusting the heating temperature of the photovoltaic module can accurately adjust the local heating speed of the heating plate, eliminate the local temperature unevenness, thereby making the temperature distribution of the whole heating plate uniform, ensuring the lamination uniformity, and improving the lamination quality.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic module lamination technology, and particularly relates to a method for precisely adjusting the heating temperature of a photovoltaic module. Background Technology

[0002] Photovoltaic module laminators are crucial equipment in photovoltaic module manufacturing and are experiencing rapid development. Currently, the lamination of photovoltaic modules typically employs the following method: placing the photovoltaic module within a sealed working chamber and heating and pressurizing it. During lamination, the photovoltaic module is positioned above a heating plate, supported and heated by the plate. Heating methods include electric heating and electromagnetic heating. Regardless of whether electric or electromagnetic heating is used, all types of laminators face the following technical challenges: due to factors such as the density of the heating plate material itself, as well as positional errors between heating wires and electromagnetic wires, unwanted localized high-temperature and low-temperature spots appear on the heating plate surface. These localized high-temperature and low-temperature spots are inherent to the heating system itself, typically exhibiting a temperature difference of approximately 3 degrees Celsius. These cannot be adjusted by modifying the localized heating temperature, and currently, there is no good solution to this problem, making it a significant challenge for the industry. Summary of the Invention

[0003] The present invention aims to address the shortcomings of existing photovoltaic module laminator heating devices, where the heating plate has localized high and low temperature points that cannot be adjusted by adjusting the heating power. The invention provides a method for precisely adjusting the heating temperature of photovoltaic modules.

[0004] The objective of this invention is mainly achieved through the following technical solutions.

[0005] A method for precisely adjusting the heating temperature of photovoltaic modules involves setting through holes on a heating plate for threading electromagnetic wires, placing the electromagnetic wires inside the through holes, and openings on one surface of the heating plate corresponding to the through holes along the extension direction of the through holes, with the openings perpendicular to the through holes. By adjusting the number, position, and / or area of ​​the openings, the effective heating area of ​​a certain region of the heating plate is adjusted, thereby adjusting the heating rate of that region to match the heating rate of a reference point. Increasing the number of openings and decreasing the heating area reduces the heating rate, while decreasing the number of openings and increasing the effective heating area increases the heating rate. An insulating protective sleeve is set on the outer layer of the electromagnetic wires to provide heat insulation and protection. The heating plate is divided into sections: the area for placing photovoltaic modules is the central area, and the areas outside the central area are the side areas. The spacing of the through holes in the central area is greater than the spacing of the through holes in the side areas A and B on both sides of the central area. The method for adjusting the number of openings is as follows: set temperature regulating holes along the wire hole, equip the temperature regulating holes with temperature regulating plugs, and the temperature regulating plugs can close the temperature regulating holes. By setting temperature regulating plugs on one or more temperature regulating holes, the number of openings on the heating plate can be adjusted, thereby adjusting the effective heating area of ​​the local area of ​​the heating plate. Install temperature-regulating plugs on all temperature-regulating holes, test the temperature of the heating plate test area, and use the heating rate of the lowest temperature point as a reference. Remove one or more temperature-regulating plugs from the area corresponding to the high temperature point to reduce the heated area of ​​that area and make it consistent with the heating rate of the lowest temperature point. Alternatively, leave all temperature-regulating holes open, detect the temperature of the heating plate test area, and use the heating rate of the highest temperature point as a reference heating rate. Install temperature-regulating plugs on the temperature-regulating holes in the area where the low temperature point is located to increase the heated area of ​​that area and improve the heating rate of that low temperature point. The opening is provided on the back of the heating plate; The temperature regulating holes are evenly distributed along the extension direction of the wire hole. The material of the temperature regulating seal is the same as that of the heating plate. The shape and thickness of the mating part of the temperature regulating seal and the temperature regulating hole are the same as the shape of the temperature regulating hole and are of equal thickness and the same material as the heating plate. The temperature regulating hole and the temperature regulating seal are connected by thread, adhesive or insertion to achieve a closed connection. The temperature regulating hole is a regular polygonal hole or a round hole with a diameter of 12-24mm and a spacing of 100-200mm. A rectangular heating plate is used, with wire holes arranged along the long or short side of the heating plate and extending through its entire width or length. At both ends of the wire holes, highly conductive, non-magnetic temperature control devices are inserted between the electromagnetic wire and the working surface of the heating plate. The temperature control devices are in the form of plates or sleeves to weaken or eliminate electromagnetic induction in that area. The conductivity of the temperature control devices is higher than that of the heating plate. Side areas A and B, as well as the central area, are independent heating units. The electromagnetic coils of side areas A, B, and the central area are connected to their respective electromagnetic controllers for electromagnetic heating control. When openings are made on the heating plate, low-temperature or high-temperature points are identified in each area and adjusted accordingly. The central area is divided into multiple zones, and the electromagnetic coil of each central zone is connected to an electromagnetic controller for independent control. Within the same area, the spacing between the thread holes in the area closer to the center area is greater than the spacing between the thread holes in the area farther from the center area. The spacing between the thread holes varies in a step-like manner. The spacing between some thread holes is smaller than the spacing between other thread holes, or the spacing between the thread holes varies linearly. The spacing between the thread holes varies in an increasing or decreasing manner. After the electromagnetic wire passes through a wire hole, it enters an adjacent wire hole and is wound a set number of times in the two wire holes. Then it enters the next two wire holes and is wound a specified number of times. This process is repeated in the remaining wire holes. When two or more electromagnetic coils are placed in one wire hole, the electromagnetic wires located in the open slot are arranged in a straight line. The temperature control device is made of aluminum or copper, and the heating plate is made of steel.

[0006] The method for precisely adjusting the heating temperature of a photovoltaic module using the present invention can adjust the induction area of ​​the heating plate and the electromagnetic coil by adjusting the number, position and / or area of ​​the openings, thereby adjusting the heating rate and heating temperature of that part. It can precisely adjust the local heating rate of the heating plate, eliminate local temperature unevenness, and thus make the temperature distribution of the entire heating plate uniform.

[0007] When testing the overall temperature uniformity of the heating plate, if localized low-temperature spots are found, install temperature-regulating seals at one or more temperature-regulating holes in the area corresponding to the localized low-temperature spot. This integrates the temperature-regulating seals with the heating plate, increasing the heating area in that area and eliminating the localized low-temperature spot. Alternatively, install temperature-regulating seals at each temperature-regulating hole first, integrating them with the heating plate. Then test the heating temperature uniformity of the heating plate. If localized high-temperature spots are found, remove one or more temperature-regulating seals at the corresponding locations to eliminate the localized high-temperature spot. This method is simple and highly operable. It only requires adjustment before the heating plate is installed, ensuring there are no obvious localized high-temperature or low-temperature spots on the heating plate. One adjustment is sufficient for future adjustments, guaranteeing lamination uniformity and improving lamination quality.

[0008] Explanation of reference numerals in the attached figures 1-Heating plate; 2-Electromagnetic wire; 3-Wire hole; 31-Open slot; 32-Slot seal; 4-Temperature adjustment hole; 5-Temperature adjustment seal; 6-Insulating protective sleeve; 7-Back of heating plate; 8-Working surface; 9-Temperature adjustment device; 91-Adjusting plate; 92-Fixing plate; 93-Mounting hole; 94-Sleeve; 95-Adjusting hole Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the main structure of an embodiment of the photovoltaic module heating device of the present invention; Figure 2 For this Figure 1 A schematic diagram of the AA cross-sectional view; Figure 3 This is a schematic diagram of an embodiment of the method for precisely adjusting the heating temperature of a photovoltaic module according to the present invention; Figure 4 This is a schematic diagram of another embodiment of the photovoltaic module laminator heating device of the present invention; Figure 5This is a schematic diagram of another embodiment of the photovoltaic module laminator heating device of the present invention; Figure 6 This is a schematic diagram of the electromagnetic wire threading structure and the location of the temperature regulating device of the present invention; Figure 7 This is a schematic front view of an embodiment of the temperature control device of the present invention; Figure 8 for Figure 7 A top view diagram; Figure 9 for Figure 7 A schematic diagram of the left side view; Figure 10 This is a schematic front view of another embodiment of the temperature control device of the present invention; Figure 11 for Figure 10 A top view diagram; Figure 12 for Figure 10 A schematic diagram of the left side view; Figure 13 This is a schematic diagram of the threading structure for another embodiment of the electromagnetic wire; Figure 14 This is a schematic diagram of the threading structure for another embodiment of the electromagnetic wire; Figure 15 This is a schematic diagram of the threading structure for another embodiment of the electromagnetic wire. Detailed Implementation

[0010] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0011] In the method of this invention, the heating device of the laminator adopts a structure combining an electromagnetic heating device and a heating plate. The working surface of the heating plate is used to heat the photovoltaic module, and the surface opposite to the heating plate is the back of the heating plate. Typically, a wire-passing hole is provided inside the heating plate, and an electromagnetic wire is wound around the wire-passing hole, extending within the heating plate. After winding, the electromagnetic wire is energized to heat the heating plate. Multiple temperature measurements are taken on the heating plate to identify the highest temperature point. At the location corresponding to the highest temperature point, an opening is made at the position of the corresponding wire-passing hole on the heating plate. This opening can be one or multiple openings, the number and size depending on the specific temperature difference. By making these openings, the effective contact area between the heating plate and the electromagnetic wire at that location is reduced, thereby adjusting the effective heating area of ​​the heating plate to match the heating rate of the reference point.

[0012] Because the above method involves already threading the electromagnetic wire, opening the heating plate again requires removing the wire and re-threading it. Furthermore, the re-threading changes the wire's position, affecting the temperature control effect. Therefore, a new method is proposed: before installing the electromagnetic wire, uniformly install temperature control holes along the extension direction of all the threading holes on the heating plate at positions corresponding to them. Thread the electromagnetic wire through these holes and equip them with temperature control plugs. Temperature control holes with plugs maintain their effective heating area or change only slightly. Temperature control holes without plugs form openings for adjusting the effective heating area. This design can be implemented in two ways: one is to install temperature control plugs on all temperature control holes, then perform a temperature test on the heating plate to identify localized high-temperature points. Remove the plugs corresponding to these high-temperature points to create openings, reducing the effective heating area of ​​the heating plate at those locations, thus making the heating rate at those locations comparable to a reference heating rate. Another specific operating method is to leave all temperature-adjusting holes unsealed, energize the electromagnetic wire, identify localized low-temperature points, and then install temperature-adjusting plugs on the temperature-adjusting holes at these low-temperature points. This reduces the number of openings, increases the effective heating area of ​​the heating plate, and improves the heating rate at that location, making it comparable to the reference heating rate. Both methods adjust the effective heating area of ​​the heating plate. Using this method, temperature-adjusting holes are pre-set on the heating plate, and the number of openings on the heating plate is adjusted by whether or not temperature-adjusting plugs are installed. This adjusts the effective interaction area and position of the heating plate and the electromagnetic wire. Therefore, testing and adjustment can be performed simultaneously, making the operation particularly convenient and quick. It eliminates the steps of disassembling and rewinding the electromagnetic wire, improving production efficiency.

[0013] To address the technical issue of temperature drop in the central area receiving photovoltaic (PV) modules during production, necessitating increased heating temperatures, which in turn leads to a rise in temperature in the peripheral areas, causing overheating, the heating plate is divided into zones, and the spacing of the wiring holes in different zones is adjusted. When dividing the heating plate into zones, the temperature uniformity can be adjusted by identifying and adjusting the low-temperature or high-temperature points within each zone. The area where the PV modules are placed on the heating plate is the central zone. The areas near the perimeter of the heating plate are more affected by the ambient temperature and experience a faster temperature drop than the central zone; these are called the peripheral zones. The peripheral zones are located around the central zone. The two sides of the heating plate corresponding to the length of the wiring holes are designated as peripheral zones A and B, and the other two sides are designated as peripheral zones C and D. The spacing of the wiring holes in the central zone is greater than that in peripheral zones A and B. The spacing of the wiring holes in peripheral zones A and B can be equal, or the spacing of the wiring holes in the areas adjacent to the central zone can be greater than that in the areas farther from the central zone. The spacing of the wire holes can vary in a stepped manner, for example, the spacing between some wire holes is smaller than the spacing between others. It can also vary linearly, for example, the spacing between the wire holes increases or decreases. Preferably, side zones A and B, and the central zone are independent heating units. The electromagnetic coils of side zones A, B, and the central zone are each connected to an electromagnetic controller for separate electromagnetic heating control. The electromagnetic controller controls the heating switch and heating power according to the received switch and analog signals from the microcontroller or PLC. More precise zone control is also possible; for example, the central area can be divided into multiple zones for independent control, with each central zone's electromagnetic coil connected to an electromagnetic controller. For example, four central zones could be set up, each connected to a separate electromagnetic controller.

[0014] Regardless of whether the electromagnetic wires in the edge areas are uniformly distributed, since the electromagnetic coils in edge areas C and D are shared with the central area, and their coil density is the same, when the temperature of the central area is increased, the temperature in edge areas C and D also increases, leading to an increase in the edge area temperature, which is detrimental to the photovoltaic modules. Therefore, a temperature-regulating device is added to the edge areas to reduce the interaction between the electromagnetic wires and the heating plate. A rectangular heating plate is used, with the wire holes arranged along the long or short side of the heating plate and extending across its entire width or length. Highly conductive, non-magnetic temperature-regulating devices are inserted at both ends of the wire holes, between the electromagnetic wires and the working surface of the heating plate, to cover the electromagnetic wires in the edge areas, thereby reducing or eliminating electromagnetic induction in this region. The conductivity of the temperature-regulating device must be higher than that of the heating plate. Because the electromagnetic induction intensity in the edge areas is reduced, when the temperature of the central area rises, the temperature of the edge areas does not rise synchronously, preventing the edge area temperature from exceeding the required range. To achieve more precise adjustments, edge zone A, edge zone B, and the central zone are each configured as an independent heating unit. The electromagnetic coils of edge zone A, edge zone B, and the central zone are each connected to their respective electromagnetic controllers for independent electromagnetic heating control. When openings are made on the heating plate, the low-temperature or high-temperature points are located in each zone for individual adjustments. This allows the edge and central zones to be heated separately as needed, further enabling precise adjustment of the photovoltaic module's heating temperature.

[0015] The above methods can be achieved using a laminator with the following structure.

[0016] like Figure 1-15 As shown, the photovoltaic module laminator of this embodiment includes a heating device, which comprises a heating plate 1 and an electromagnetic heating device capable of heating the heating plate. The surface of the heating plate facing the photovoltaic module is the working surface, and the surface of the heating plate facing away from the photovoltaic module is the back surface of the heating plate. The electromagnetic heating device includes an electromagnetic coil composed of electromagnetic wires 2 and an electromagnetic controller. The heating plate is used to heat the photovoltaic module during the lamination process, which can be direct heating or indirect heating. For example, a high-temperature cloth is laid on the surface of the heating plate, and the photovoltaic module is placed on the high-temperature cloth. The high-temperature cloth is directly heated by the heating plate, and the high-temperature cloth conducts heat to the photovoltaic module. Another structure is that the heating plate heats the air, and the photovoltaic module is heated by the air. This is indirect heating. Yet another structure is that the heating plate heats a silicone plate, which serves as a pressure application component, and the silicone plate heats the air above it, thereby maintaining the temperature inside the lamination chamber. In one structure, the heating plate supports the photovoltaic module, and the heating plate and the upper chamber of the laminator can form a sealed chamber. In this structure, the working surface of the heating plate supports the photovoltaic module and heats the surface of the photovoltaic module. In another configuration, a heating plate is positioned above the photovoltaic module, acting as a pressure-applying component to heat the photovoltaic module.

[0017] The heating plate of this invention is made of a magnetically conductive material, typically using 45 steel or Q345 steel, which has good magnetic permeability and electromagnetic heating efficiency. Multiple parallel-arranged wire holes 3 are provided within the heating plate. Normally, each wire hole is parallel to the working surface of the heating plate. Electromagnetic wires are wound around the wire holes to form electromagnetic coils, and preferably, each electromagnetic wire is also parallel to the working surface of the heating plate. The electromagnetic coils, the heating plate, and the electromagnetic controller connected to the electromagnetic coils together constitute the heating device of this invention. The following description uses a structure where the heating plate supports and heats a photovoltaic module as an example. In this structure, the working surface of the heating plate faces upward. Temperature regulating holes 4 are provided on the back 7 of the heating plate at positions corresponding to the wire holes 3. The temperature regulating holes intersect with the wire holes and are interconnected. The temperature regulating holes are preferably blind holes, and at least one is included; usually, there are multiple holes, depending on the area of ​​the heating plate and the specific temperature requirements. By adjusting the number of temperature regulating holes, the effective heating area of ​​the electromagnetic coil on the heating plate can be changed, thereby allowing adjustment of the heating rate at various points on the heating plate as needed, thus meeting the heating temperature requirements in various scenarios. Increasing the effective heating area accelerates heating, while decreasing the effective heating area slows it down. According to this invention, the heating device has two structures. Structure one involves multiple temperature-adjusting holes evenly distributed on the back of the heating plate, corresponding to the wiring holes. Each temperature-adjusting hole 4 is fitted with a temperature-adjusting plug 5, sealing the hole. When the plug is closed, it becomes part of the heating plate, effectively increasing the heating area. The function of these temperature-adjusting holes is to keep one or more corresponding holes open when the temperature at a specific point needs to be lowered, while the holes at other points are closed by the plugs, thus interacting with the electromagnetic wire. Structure two involves all temperature-adjusting holes being open. When a point needs to increase its heating rate, the plugs can be used to close the holes, increasing the interaction area between the electromagnetic coil and the heating plate. The material of the temperature-adjusting seal should be the same as that of the heating plate. Ideally, the thickness of the seal should match the thickness of the temperature-adjusting holes on the heating plate. However, it can be thicker or thinner depending on the desired temperature. Generally, the diameter of the temperature-adjusting holes is 12-24mm, and the spacing between them is 100-200mm, with the holes evenly distributed. The temperature-adjusting seal can be secured with screws (in which case the temperature-adjusting holes are threaded), or with high-temperature adhesive, or with a pin inserted into the hole. The temperature-adjusting holes can also be regular polygonal structures such as squares, pentagons, or hexagons. Using regular polygons is primarily to avoid uneven temperature adjustment.

[0018] By adjusting the number of temperature-regulating seals installed at different points, the heating rate at each point of the heating plate can be precisely controlled, ultimately achieving uniform temperature across the entire heating plate surface.

[0019] The cross-section of the wire-passing hole can be rectangular, semi-circular, oblong, trapezoidal, etc., and is not limited to a specific shape, as long as its bottom cross-section is straight. This allows the electromagnetic wires to remain in a straight line arrangement.

[0020] There are various ways to wind the electromagnetic wire. A preferred embodiment is that the wire-passing hole extends through the length or width of the heating plate. The electromagnetic wire enters the first slot in the side wall of the heating plate, then enters the second slot. After winding a specified number of turns in the first and second slots, it enters the third slot. The specified number of turns are then made in the third and fourth slots, until the electromagnetic wire is wound in all slots. Alternatively, it can be as follows... Figure 13 and Figure 14 The winding structure is as follows. In a preferred embodiment, the opening slot 3 is a rectangular slot, and the slot opening is sealed with a rectangular plate. Alternatively, the opening slot is an oblong hole-shaped slot, and the two sides of the slot opening seal are arc-shaped walls adapted to the oblong hole-shaped slot, or it is a trapezoidal slot, and the slot opening seal is a trapezoidal plate. Two or more electromagnetic wires are located in the opening slot, and each electromagnetic wire is located in the same plane and arranged in a straight line. The slot opening seal limits the electromagnetic wires to prevent them from overlapping and entangled. With the above-mentioned opening slot structure and winding structure, when the heating device malfunctions, the electromagnetic wires can be pulled out from the opening slot from both sides or ends of the heating plate for inspection without the need for operators to enter under the heating plate, thus solving the long-standing technical problem of difficult maintenance of heating devices. This structure is particularly advantageous for multi-layer photovoltaic module laminators. It solves the technical problem of multi-layer laminators not having space for maintenance under the heating plate, greatly reducing the investment of manpower and resources. Another advantage of using an open slot on the back of the heating plate as a wire-passing hole is that the rectangular slot ensures a horizontal position and consistent depth during processing. For example, each slot can be machined in one pass on a milling machine without requiring two positioning operations. Furthermore, it guarantees consistent slot depth. Because the electromagnetic wires within the slots are arranged in a straight line, the distance between the wires and the heating plate surface is uniform. Therefore, the heating plate exhibits good heating uniformity, effectively solving the problem of uneven temperature distribution on the heating plate surface and ensuring the processing quality of the photovoltaic modules. The temperature adjustment hole is located on the slot sealing plate.

[0021] When the heating plate is divided into zones, the spacing of the wire holes in the edge zone is preferably 30-60mm to make the electromagnetic coils more densely distributed. The spacing in the central zone is larger than that in the edge zone, preferably 60-80mm. The size of the wire holes is preferably large enough to accommodate 3-6 sets of electromagnetic coils.

[0022] The winding of the electromagnetic coil must ensure that the current direction is consistent in each wire, and the coil length must be determined according to the required magnetic flux. Different magnetic fluxes correspond to different coil lengths and corresponding electromagnetic controller models. The outer layer of the electromagnetic wire has a heat-insulating layer to enhance its heat insulation and electrical insulation capabilities in high-temperature environments, thereby improving safety.

[0023] Temperature regulating devices 9 are installed at edge zones C and D to counteract undesirable temperature rises in edge zones C and D caused by heating the central zone. The temperature regulating device 9 may be an adjusting plate 91, located between the working surface of the heating plate and the electromagnetic coil. Its length is less than or equal to the width W of the edge zone, and its width is less than the length of the wire hole, capable of shielding a portion of the electromagnetic coil. For stability, a fixing plate 92 is preferably provided, located at one end of the adjusting plate. The two are fixedly connected as a single unit to form a bent structure. The fixing plate has a connecting hole for bolts to pass through. The fixing plate bends upward and is fixedly connected to the side surface of the heating plate by bolts. Alternatively, it may be a sleeve 94. Preferably, at least two surfaces of the sleeve facing the heating plate have adjusting holes 95, which further enhance the temperature regulating capability of the adjusting plate. The shape and size of the sleeve 94 are adapted to the shape and size of the wire hole, allowing it to enter the wire hole. A slot seal is provided at the opening of the slot, and a temperature regulating hole is provided on the slot seal. The temperature control devices, such as the adjusting plate and sleeve, are made of highly conductive non-magnetic materials, such as aluminum and copper. The heating plate is made of conductive magnetic materials, such as Q235 steel, 45 steel, and Q345 steel, whose conductivity is lower than that of the temperature control device. In the electromagnetic heating device using this patent structure, the Q235 steel, 45 steel, and Q235 steel used as the heating plate are ferromagnetic materials with strong magnetic permeability, while aluminum and copper are non-magnetic materials with poor magnetic permeability. Under electromagnetic heating conditions, aluminum and copper have weaker eddy current effects and slower heating compared to Q235 steel, 45 steel, and Q235 steel. Most of the electromagnetic energy generated by the electromagnetic coil is not effectively utilized, resulting in poor heating performance. In the structure of this patent application, because a temperature control device is included, the electromagnetic wires act directly on the poorly permeable temperature control device, causing the heating temperature in the area with the temperature control device to be lower than the heating temperature in the area without the device under the same conditions. Therefore, it effectively regulates the temperature of a portion of the area. The edge area of ​​the heating plate is the area outside the central area of ​​the heating plate; the central area of ​​the heating plate is used to place the photovoltaic module. This structure is suitable for situations where the spacing of the wire holes on the entire heating plate is equal or unequal.

[0024] In a further embodiment, an insulating protective sleeve 6 is added to the outside of each electromagnetic wire or all electromagnetic wires in each wire hole to protect the electromagnetic wires. The insulating protective sleeve preferably has a heat insulation function.

[0025] The heating device and method for precisely adjusting the temperature of photovoltaic modules according to this invention can be used in different types of photovoltaic module laminators, including sheet laminators, plate laminators, and semi-flexible laminators. For example, when used in a sheet laminator, the heating plate supports the photovoltaic module and works in conjunction with the elastic sheet to apply pressure to the photovoltaic module. The laminator includes an upper chamber with an elastic sheet positioned at the lower opening. The upper chamber and heating plate form a sealed lamination chamber, which is divided into upper and lower vacuum chambers by the elastic sheet. The upper vacuum chamber is used for filling with gas, and the lower vacuum chamber is used to place the photovoltaic module and is evacuated. The heating plate forms part of the lower vacuum chamber and receives and supports the photovoltaic module during lamination, working together with the sheet to compress the module. In this type of laminator, the entire sheet can be used as the pressure-applying component. Another structure combines the sheet with a rigid lamination plate to form a semi-flexible lamination component. The adhesive sheet is located around the periphery of the rigid laminate, and lamination is achieved through contact between the rigid laminate and the photovoltaic module; this is called a semi-flexible laminator. A plate-type laminator, on the other hand, consists of a rigid laminate and a heating plate forming a sealed cavity. After a vacuum is drawn within the sealed cavity, pressure is applied to the photovoltaic module through the rigid laminate. The heating device of this invention can be used in both multi-layer and single-layer laminators. In a multi-layer laminator, each layer has a sealed chamber, with each sealed chamber arranged vertically, and each heating plate also arranged vertically.

[0026] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for precisely adjusting the heating temperature of a photovoltaic module, characterized in that, A wire-passing hole is provided on the heating plate for threading electromagnetic wires. The electromagnetic wire is placed in the wire-passing hole. An opening is made on one surface of the heating plate corresponding to the wire-passing hole and extending along the direction of the wire-passing hole, so that the opening is perpendicular to the wire-passing hole. The effective heating area of ​​a certain region of the heating plate is adjusted by adjusting the number, position, and / or area of ​​the openings, thereby adjusting the heating rate of that region to match the heating rate of the reference point. Increasing the number of openings and decreasing the heating area reduces the heating rate, while decreasing the number of openings and increasing the effective heating area increases the heating rate. An insulating protective sleeve is provided on the outer layer of the electromagnetic wire to provide heat insulation and protection for the electromagnetic wire. The heating plate is divided into sections, with the area for placing photovoltaic modules as the central area and the area outside the central area as the side areas. The spacing of the wire-passing holes in the central area is greater than the spacing of the wire-passing holes in the side areas A and B on both sides of the central area.

2. The method for precisely adjusting the heating temperature of a photovoltaic module as described in claim 1, characterized in that, The method for adjusting the number of openings is as follows: set temperature regulating holes along the wire hole, equip the temperature regulating holes with temperature regulating plugs, and the temperature regulating plugs can close the temperature regulating holes. By setting temperature regulating plugs on one or more temperature regulating holes, the number of openings on the heating plate can be adjusted, thereby adjusting the effective heating area of ​​the local area of ​​the heating plate.

3. The method for precisely adjusting the heating temperature of a photovoltaic module as described in claim 2, characterized in that, Install temperature-regulating plugs on all temperature-regulating holes, test the temperature of the heating plate test area, and use the heating rate of the lowest temperature point as a reference. Remove one or more temperature-regulating plugs from the area corresponding to the high temperature point to reduce the heated area of ​​that area and make it consistent with the heating rate of the lowest temperature point. Alternatively, leave all temperature-regulating holes open, detect the temperature of the heating plate test area, and use the heating rate of the highest temperature point as a reference heating rate. Install temperature-regulating plugs on the temperature-regulating holes in the area where the low temperature point is located to increase the heated area of ​​that area and improve the heating rate of that low temperature point.

4. The method for precisely adjusting the heating temperature of a photovoltaic module as described in claim 1, characterized in that, The opening is provided on the back of the heating plate.

5. The method for precisely adjusting the heating temperature of a photovoltaic module as described in claim 2, characterized in that, The temperature regulating holes are evenly distributed along the extension direction of the wire hole. The material of the temperature regulating seal is the same as that of the heating plate. The shape and thickness of the mating part between the temperature regulating seal and the temperature regulating hole are the same as the shape of the temperature regulating hole and are of equal thickness, and are made of the same material as the heating plate. The temperature regulating hole and the temperature regulating seal are connected by thread, adhesive or insertion to achieve a closed connection. The temperature regulating hole is a regular polygonal hole or a round hole with a diameter of 12-24mm and a spacing of 100-200mm.

6. The method for precisely adjusting the heating temperature of a photovoltaic module as described in claim 1, characterized in that, A rectangular heating plate is used, with wire holes arranged along the long or short side of the heating plate and extending through its entire width or length. Highly conductive, non-magnetic temperature control devices are inserted at both ends of the wire holes, between the electromagnetic wire and the working surface of the heating plate. These devices are plate-shaped or sleeve-shaped to weaken or eliminate electromagnetic induction in that area. The conductivity of the temperature control devices is higher than that of the heating plate. Side zones A and B, as well as the central zone, are independent heating units. The electromagnetic coils in side zones A, B, and the central zone are connected to their respective electromagnetic controllers for separate electromagnetic heating control. When openings are made on the heating plate, low-temperature or high-temperature points are identified in each zone and adjusted accordingly.

7. The method for precisely adjusting the heating temperature of a photovoltaic module as described in claim 6, characterized in that, The central area is divided into multiple zones, and the electromagnetic coil of each central zone is connected to an electromagnetic controller for independent control.

8. The method for precisely adjusting the heating temperature of a photovoltaic module as described in claim 7, characterized in that, Within the same area, the spacing between the thread holes in the region closer to the center area is greater than the spacing between the thread holes in the region farther from the center area. The spacing between the thread holes varies in a step-like manner. The spacing between some thread holes is smaller than the spacing between other thread holes, or the spacing between the thread holes varies linearly. The spacing between the thread holes either increases or decreases.

9. A method for precisely adjusting the heating temperature of a photovoltaic module as described in claim 6, characterized in that, After passing through one wire hole, the electromagnetic wire enters the adjacent wire hole and is wound a set number of times in the two wire holes before entering the next two wire holes and being wound a specified number of times. This process is repeated in the remaining wire holes. When two or more electromagnetic coils are placed in one wire hole, the electromagnetic wires located in the open slot are arranged in a straight line.

10. A method for precisely adjusting the heating temperature of a photovoltaic module as described in claim 6, characterized in that, The temperature control device is made of aluminum or copper, and the heating plate is made of steel.

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