Heating device for a multilayer multi-cavity laminator, multilayer multi-cavity laminator and laminating method

Abstract

This invention relates to a heating device for a multi-layer, multi-cavity laminator, the lamination machine itself, and a lamination method. The heating device includes a first heating unit, a second heating unit, and a third heating unit connected by an electrically controlled telescopic mechanism. The first heating unit includes a first elastic metal mesh with multiple first heat-conducting pipes embedded inside. A top heat insulation plate is laid on the upper surface of the first elastic metal mesh, and a first lamination plate is laid on the lower surface. The second heating unit includes a second elastic metal mesh with multiple second heat-conducting pipes embedded inside. Both the upper and lower surfaces of the second elastic metal mesh are laid with second lamination plates. The third heating unit includes a third elastic metal mesh with multiple third heat-conducting pipes embedded inside. A third lamination plate is laid on the upper surface of the third elastic metal mesh, and a bottom heat insulation plate is laid on the lower surface. This invention addresses the problems of photovoltaic module crushing and uneven heating.

Description

Technical Field

[0001] This invention relates to the field of laminator technology, and in particular to a heating device for a multi-layer, multi-cavity laminator, a multi-layer, multi-cavity laminator, and a lamination method. Background Technology

[0002] As my country's photovoltaic industry matures and expands, both production equipment and product quality need improvement to meet rapidly growing market demands. With increasing market demands for higher quality photovoltaic modules and larger module sizes, the requirements for photovoltaic module laminators are also rising. Photovoltaic module laminators are core equipment in the photovoltaic module production process.

[0003] Patent CN 201720435400.4 discloses a laminator with rapid and uniform heating. The movable pressure plate has a cavity inside. A placement plate is set in the movable pressure plate, and a limiting groove is opened on the placement plate. The limiting groove fixes and engages the heating tube, so that the heat generated by the heating tube can directly act on the movable pressure plate. The heat generated above the heating tube can directly act on the upper part of the movable pressure plate. However, the limiting groove restricts the heat generated by the heating tube, preventing it from directly acting on the lower part of the movable pressure plate. This makes it impossible to achieve uniform heating of the movable pressure plate. At the same time, the lamination process suffers from the problem of extrusion damage due to direct contact with the material, and the yield rate during production is low. This not only fails to meet the product performance and appearance standards, but also increases the production cost.

[0004] Therefore, in order to address the above problems, the present invention urgently needs to provide a heating device for a multi-layer, multi-cavity laminator, a multi-layer, multi-cavity laminator, and a lamination method. Summary of the Invention

[0005] The purpose of this invention is to provide a heating device for a multi-layer, multi-cavity laminator, a multi-layer, multi-cavity laminator, and a lamination method. The design of the heating device, multi-layer, multi-cavity laminator, and lamination method aims to solve the technical problems existing in the prior art, such as damage and uneven heating of photovoltaic modules during the extrusion process, which affect product quality and fail to meet standard requirements.

[0006] To address the above problems, the present invention mainly provides the following technical solutions:

[0007] On one hand, the present invention provides a heating device for a multi-layer, multi-cavity laminator, which includes, from top to bottom, a first heating unit, a second heating unit and a third heating unit, wherein the first heating unit, the second heating unit and the third heating unit are connected by an electrically controlled telescopic mechanism;

[0008] The first heating unit includes a first elastic metal mesh, in which multiple first heat-conducting pipes are embedded and installed. A top heat insulation plate is laid on the upper surface of the first elastic metal mesh, and a first laminate is laid on the lower surface of the first elastic metal mesh.

[0009] The second heating unit includes a second elastic metal mesh, with multiple second heat-conducting pipes embedded inside the second elastic metal mesh, and second laminates laid on both the upper and lower surfaces of the second elastic metal mesh.

[0010] The third heating unit includes a third elastic metal mesh, in which multiple third heat-conducting pipes are embedded. A third laminate is laid on the upper surface of the third elastic metal mesh, and a bottom heat insulation plate is laid on the lower surface of the third elastic metal mesh.

[0011] It also includes a controller and an operation panel. The operation panel is electrically connected to the controller, and the electrically controlled telescopic mechanism, the first heat pipe, the second heat pipe, and the third heat pipe are all electrically connected to the controller.

[0012] Furthermore, the electrically controlled telescopic mechanism includes four first electrically controlled telescopic rods and four second electrically controlled telescopic rods. The first heating unit is connected to the second heating unit through the first electrically controlled telescopic rods, and the second heating unit is connected to the third heating unit through the second electrically controlled telescopic rods. Both the first and second electrically controlled telescopic rods are electrically connected to the controller.

[0013] Furthermore, each of the first electrically controlled telescopic rods is located between the first heating unit and the second heating unit, with one end perpendicularly penetrating the top corner of the first heating unit and the other end perpendicularly penetrating the top corner of the second heating unit; each of the second electrically controlled telescopic rods is located between the second heating unit and the third heating unit, with one end perpendicularly penetrating the top corner of the second heating unit and the other end perpendicularly penetrating the top corner of the third heating unit; the first electrically controlled telescopic rods can cover the first heating unit and the second heating unit, and the second electrically controlled telescopic rods can cover the second heating unit and the third heating unit.

[0014] Furthermore, each of the first heat-conducting pipes is uniformly arranged within the first elastic metal mesh along its length; each of the second heat-conducting pipes is uniformly arranged within the second elastic metal mesh along its length; and each of the third heat-conducting pipes is uniformly arranged within the third elastic metal mesh along its length.

[0015] Furthermore, the first, second, and third elastic metal meshes are all made of copper; the top and bottom insulation boards are coated with aluminum polyester.

[0016] Furthermore, the lower surface of the first laminating plate is provided with a first concave groove, and the upper surface of the second laminating plate located above the second elastic metal mesh is provided with a second upper groove. The first concave groove and the second upper groove form a first laminating cavity. The lower surface of the second laminating plate located below the second elastic metal mesh is provided with a second lower groove, and the upper surface of the third laminating plate is provided with a third groove. The second lower groove and the third groove form a second laminating cavity.

[0017] Furthermore, a temperature sensor is installed on the second heating unit, and the temperature sensor is electrically connected to the controller.

[0018] On the other hand, the present invention provides a multi-layer multi-cavity laminator, including a base, a frame fixedly installed on the base, and a groove provided inside the base;

[0019] It also includes heating devices for multiple multi-layer multi-cavity laminators arranged side by side as described above. The bottom of the heating device of each multi-layer multi-cavity laminator is fixed to the groove through a retractable support mechanism, and the top of the heating device of each multi-layer multi-cavity laminator is fixed to the frame through a lifting mechanism.

[0020] Both the support mechanism and the lifting mechanism are electrically connected to the controller.

[0021] Furthermore, the control panel is mounted on the outside of the base.

[0022] In another aspect, the present invention provides a lamination method using a multi-layer, multi-cavity laminator. This lamination method involves laminating the various layers of a photovoltaic module using the aforementioned multi-layer, multi-cavity laminator, and includes the following steps:

[0023] S1 transports the materials of each layer of the photovoltaic module to the space between the first heating unit and the second heating unit and / or between the second heating unit and the third heating unit. After the materials are extruded and heated for a period of time, the materials are bonded together.

[0024] S2 involves cooling the bonded layers of material to obtain a photovoltaic module.

[0025] The heating device, multi-layer multi-cavity laminator, and lamination method provided by this invention have the following advantages compared with the prior art:

[0026] On one hand, the present invention provides a heating device for a multi-layer, multi-cavity laminator. A first elastic metal mesh, a second elastic metal mesh, and a third elastic metal mesh are respectively provided in the first heating unit, the second heating unit, and the third heating unit. A first heat-conducting pipe, a second heat-conducting pipe, and a third heat-conducting pipe are respectively provided within the first, second, and third elastic metal meshes. When the heat-conducting pipes are activated for heating, the elastic metal mesh has good thermal conductivity, allowing the photovoltaic modules to be heated evenly. The design of the top and bottom heat insulation plates of the device serves to insulate the heat and prevent burns to workers.

[0027] On the other hand, the present invention provides a multi-layer multi-cavity laminator. The multi-layer multi-cavity laminator adopts the heating device of the above-mentioned multi-layer multi-cavity laminator. The first elastic metal mesh, the second elastic metal mesh and the third elastic metal mesh have high strength and toughness, and have a certain elasticity. They play a buffering role when subjected to extrusion force, protect the photovoltaic module, prevent cracks from occurring and damage during the stress process, and make the photovoltaic module more uniformly stressed.

[0028] On the other hand, the present invention provides a lamination method for a multi-layer, multi-cavity laminator. During the extrusion process of each layer of photovoltaic module material in the laminator, it can be heated and stressed evenly, effectively avoiding damage to the photovoltaic module by extrusion, improving the yield rate, and meeting the product quality and appearance requirements, thereby greatly reducing production costs. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the heating device of the multi-layer multi-cavity laminator described in this invention (front perspective view in the open state);

[0031] Figure 2 This is a schematic diagram (front perspective view) of the multi-layer, multi-cavity laminator described in this invention.

[0032] Figure 3 This is a schematic diagram of the heating device of the multi-layer multi-cavity laminator described in this invention (front perspective view in the closed state);

[0033] Figure 4 This is a schematic diagram (longitudinal sectional view) of the structure of the first heating unit in this invention;

[0034] Figure 5This is a schematic diagram (longitudinal sectional view) of the structure of the second heating unit in this invention;

[0035] Figure 6 This is a schematic diagram (longitudinal sectional view) of the structure of the third heating unit described in this invention;

[0036] Figure 7 This is a schematic diagram (horizontal sectional view) of the structure of the first elastic metal mesh in this invention;

[0037] Figure 8 This is an exploded view of the base described in this invention;

[0038] Figure 9 This is an exploded view of the framework described in this invention;

[0039] Figure 10 This is a circuit connection diagram of the multi-layer, multi-cavity laminator described in this invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. First heating unit; 101. First elastic metal mesh; 102. First heat conduction pipe; 103. Top heat insulation plate; 104. First laminate; 2. Second heating unit; 201. Second elastic metal mesh; 202. Second heat conduction pipe; 203. Second laminate; 3. Third heating unit; 301. Third elastic metal mesh; 302. Third heat conduction pipe; 303. Third laminate; 304. Bottom heat insulation plate; 4. Electrically controlled telescopic mechanism; 401. First electrically controlled telescopic rod; 402. Second electrically controlled telescopic rod; 5. Operation panel; 6. Base; 7. Frame; 8. Groove; 9. Support mechanism; 10. Lifting mechanism. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] On the one hand, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 10 As shown, this embodiment of the invention provides a heating device for a multi-layer, multi-cavity laminator, comprising, from top to bottom: a first heating unit 1, a second heating unit 2, and a third heating unit 3, connected by an electrically controlled telescopic mechanism 4; the first heating unit 1 includes a first elastic metal mesh 101, with multiple first heat-conducting pipes 102 embedded inside; a top heat insulation plate 103 is laid on the upper surface of the first elastic metal mesh 101, and a first laminating plate 104 is laid on the lower surface of the first elastic metal mesh 101; the second heating unit 2 includes a second elastic metal mesh 201, the second elastic... The metal mesh 201 has multiple second heat-conducting pipes 202 embedded inside, and the upper and lower surfaces of the second elastic metal mesh 201 are covered with second laminates 203; the third heating unit 3 includes a third elastic metal mesh 301, which has multiple third heat-conducting pipes 302 embedded inside, the upper surface of the third elastic metal mesh 301 is covered with a third laminate 303, and the lower surface of the third elastic metal mesh 301 is covered with a bottom heat insulation plate 304; it also includes a controller and an operation panel 5, the operation panel 5 is electrically connected to the controller, and the electrically controlled telescopic mechanism 4, the first heat-conducting pipe 102, the second heat-conducting pipe 202 and the third heat-conducting pipe 302 are all electrically connected to the controller.

[0046] This invention provides a heating device for a multi-layer, multi-cavity laminator, comprising, from top to bottom: a first heating unit 1, a second heating unit 2, and a third heating unit 3, connected by an electrically controlled telescopic mechanism 4. The first heating unit 1 includes a first elastic metal mesh 101, with multiple first heat-conducting pipes 102 embedded within it. A top heat insulation plate 103 is laid on the upper surface of the first elastic metal mesh 101, and a first laminating plate 104 is laid on the lower surface. The second heating unit 2 includes a second elastic metal mesh 201, with multiple second heat-conducting pipes 202 embedded within it. Second laminating plates 203 are laid on both the upper and lower surfaces of the second elastic metal mesh 201. The third heating unit 3 includes a third elastic metal mesh 301, with multiple third heat-conducting pipes 302 embedded within it. The upper surface of the mesh 301 is covered with a third laminate 303, and the lower surface of the third elastic metal mesh 301 is covered with a bottom heat insulation plate 304. It also includes a controller and an operation panel 5, with the operation panel 5 electrically connected to the controller. The electrically controlled telescopic mechanism 4, the first heat-conducting pipe 102, the second heat-conducting pipe 202, and the third heat-conducting pipe 302 are all electrically connected to the controller. The first heating unit 1, the second heating unit 2, and the third heating unit 3 are respectively equipped with the first elastic metal mesh 101, the second elastic metal mesh 201, and the third elastic metal mesh 301. The first heat-conducting pipe 102, the second heat-conducting pipe 202, and the third heat-conducting pipe 302 are also respectively installed within the first elastic metal mesh 101, the second elastic metal mesh 201, and the third elastic metal mesh 301. When the heat-conducting pipes are activated for heating, the elastic metal mesh has good thermal conductivity, allowing the photovoltaic modules to be heated evenly. The design of the top heat insulation plate 103 and the bottom heat insulation plate 304 of the device serves to insulate the heat and prevent burns to workers.

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 10 As shown, the electrically controlled telescopic mechanism 4 of this embodiment includes four first electrically controlled telescopic rods 401 and four second electrically controlled telescopic rods 402. The first heating unit 1 is connected to the second heating unit 2 through the first electrically controlled telescopic rods 401, and the second heating unit 2 is connected to the third heating unit 3 through the second electrically controlled telescopic rods 402. Both the first electrically controlled telescopic rods 401 and the second electrically controlled telescopic rods 402 are electrically connected to the controller. The first electrically controlled telescopic rods 401 and the second electrically controlled telescopic rods 402 are high-thrust automatic telescopic rods, branded as LUI LEC, model B(32)TL, which are existing technologies and will not be described in detail here.

[0048] In this embodiment of the invention, each first electrically controlled telescopic rod 401 is located between the first heating unit 1 and the second heating unit 2, with one end perpendicularly penetrating the top corner of the first heating unit 1 and the other end perpendicularly penetrating the top corner of the second heating unit 2; each second electrically controlled telescopic rod 402 is located between the second heating unit 2 and the third heating unit 3, with one end perpendicularly penetrating the top corner of the second heating unit 2 and the other end perpendicularly penetrating the top corner of the third heating unit 3; the first electrically controlled telescopic rod 401 can cover the first heating unit 1 and the second heating unit 2, and the second electrically controlled telescopic rod 402 can cover the second heating unit 2 and the third heating unit 3. The lifting and lowering of the first electrically controlled telescopic rod 401 and the second electrically controlled telescopic rod 402 are controlled by a controller, thereby achieving the compression of the photovoltaic module.

[0049] like Figure 7 As shown, in this embodiment of the invention, each first heat pipe 102 is uniformly arranged within the first elastic metal mesh 101 along its length; each second heat pipe 202 is uniformly arranged within the second elastic metal mesh 201 along its length; and each third heat pipe 302 is uniformly arranged within the third elastic metal mesh 301 along its length, so that the photovoltaic module is heated more evenly.

[0050] The first elastic metal mesh 101, the second elastic metal mesh 201, and the third elastic metal mesh 301 in this embodiment of the invention are all made of copper, which not only has high strength and toughness but also a certain degree of elasticity, enabling uniform heating and buffering the stress on photovoltaic materials. The top heat insulation plate 103 and the bottom heat insulation plate 304 are coated with aluminum polyester, which is a heat insulation material with high reflectivity, effectively reducing heat loss, having a good heat preservation effect, reducing energy consumption, and also playing a role in corrosion prevention.

[0051] like Figure 4 , Figure 5 , Figure 6 As shown, in this embodiment of the invention, the lower surface of the first laminating plate 104 is provided with a first concave groove, and the upper surface of the second laminating plate 203 located above the second elastic metal mesh 201 is provided with a second upper groove. The first concave groove and the second upper groove form a first lamination cavity. The lower surface of the second laminating plate 203 located below the second elastic metal mesh 201 is provided with a second lower groove, and the upper surface of the third laminating plate 303 is provided with a third groove. The second lower groove and the third groove form a second lamination cavity, in which the materials of each layer of the photovoltaic module that need to be heated and extruded are placed in the corresponding cavity.

[0052] A temperature sensor is installed on the second heating unit 2 in this embodiment of the invention. The temperature sensor is electrically connected to the controller to facilitate the control of the heating temperature.

[0053] On the other hand, such as Figure 2Figure 8 Figure 9 , Figure 10 As shown, this embodiment of the invention provides a multi-layer, multi-cavity laminator, including a base 6, on which a frame 7 is fixedly installed, and a groove 8 is provided inside the base 6; it also includes multiple heating devices of the aforementioned multi-layer, multi-cavity laminator arranged side by side, the bottom of each heating device of the multi-layer, multi-cavity laminator being fixedly connected to the groove 8 through a retractable support mechanism 9, and the top of each heating device of the multi-layer, multi-cavity laminator being fixedly connected to the frame 7 through a lifting mechanism 10; both the support mechanism 9 and the lifting mechanism 10 are electrically connected to a controller.

[0054] This invention provides a multi-layer, multi-cavity laminator, comprising a base 6 on which a frame 7 is fixedly mounted, and a groove 8 formed within the base 6; it also includes multiple heating devices for the aforementioned multi-layer, multi-cavity laminator arranged side by side. The bottom of each heating device is fixedly connected to the groove 8 via a retractable support mechanism 9, and the top of each heating device is fixedly connected to the frame 7 via a lifting mechanism 10. Both the support mechanism 9 and the lifting mechanism 10 are electrically connected to a controller. The multi-layer, multi-cavity laminator uses the aforementioned heating devices. The first elastic metal mesh 101, the second elastic metal mesh 201, and the third elastic metal mesh 301 have high strength and toughness, and a certain degree of elasticity, which act as a buffer when subjected to extrusion force, protecting the photovoltaic module and preventing cracks and damage during the stress process, thus making the photovoltaic module more evenly stressed. Support mechanism 9 is an electric push rod, brand name Longxiang (Hardware), model SXTL, which is existing technology and will not be described in detail here; lifting mechanism 10 is a reciprocating motor telescopic rod, brand name Alide, model PAST-02, which is existing technology and will not be described in detail here.

[0055] like Figure 2 As shown, the operation panel 5 of this embodiment of the invention is installed on the outside of the base 6 for easy operation and control of heating and extrusion of the photovoltaic module.

[0056] In another aspect, embodiments of the present invention provide a lamination method using a multi-layer, multi-cavity laminator. The lamination method of the multi-layer, multi-cavity laminator involves laminating the various layers of materials of a photovoltaic module using the aforementioned multi-layer, multi-cavity laminator, including the following steps: S1, conveying the various layers of materials of the photovoltaic module between a first heating unit 1 and a second heating unit 2 and / or between a second heating unit 2 and a third heating unit 3, and extruding and heating the various layers of materials for a period of time to obtain bonded layers of materials; S2, cooling the bonded layers of materials to obtain the photovoltaic module.

[0057] This invention provides a lamination method using a multi-layer, multi-cavity laminator. The method involves laminating the various layers of a photovoltaic module using the aforementioned multi-layer, multi-cavity laminator, comprising the following steps: S1, conveying the various layers of the photovoltaic module between a first heating unit 1 and a second heating unit 2 and / or between the second heating unit 2 and a third heating unit 3, and subjecting each layer to extrusion and heating for a period of time to obtain bonded layers; S2, cooling the bonded layers to obtain the photovoltaic module design. During the extrusion process in the laminator, the various layers of the photovoltaic module are uniformly heated and stressed, effectively preventing damage to the photovoltaic module during extrusion, improving the yield rate, and meeting product quality and appearance requirements, thereby significantly reducing production costs.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heating device for a multi-layer, multi-cavity laminator, characterized in that, From top to bottom, it includes: a first heating unit (1), a second heating unit (2) and a third heating unit (3), which are connected by an electrically controlled telescopic mechanism (4). The first heating unit (1) includes a first elastic metal mesh (101), in which multiple first heat-conducting pipes (102) are embedded. A top heat insulation plate (103) is laid on the upper surface of the first elastic metal mesh (101), and a first laminate (104) is laid on the lower surface of the first elastic metal mesh (101). Each first heat-conducting pipe (102) is evenly distributed in the first elastic metal mesh (101) along the length direction of the first elastic metal mesh (101). The multiple first heat-conducting pipes (102) and the first elastic metal mesh (101) together constitute a composite heating body. The second heating unit (2) includes a second elastic metal mesh (201), in which multiple second heat-conducting pipes (202) are embedded. The upper and lower surfaces of the second elastic metal mesh (201) are covered with second laminates (203). Each second heat-conducting pipe (202) is evenly distributed in the second elastic metal mesh (201) along the length direction of the second elastic metal mesh (201). The multiple second heat-conducting pipes (202) and the second elastic metal mesh (201) together constitute a composite heating body. The third heating unit (3) includes a third elastic metal mesh (301), in which multiple third heat-conducting pipes (302) are embedded. A third laminate (303) is laid on the upper surface of the third elastic metal mesh (301), and a bottom heat insulation plate (304) is laid on the lower surface of the third elastic metal mesh (301). Each third heat-conducting pipe (302) is evenly distributed in the third elastic metal mesh (301) along the length direction of the third elastic metal mesh (301). The multiple third heat-conducting pipes (302) and the third elastic metal mesh (301) together constitute a composite heating body. It also includes a controller and an operation panel (5). The operation panel (5) is electrically connected to the controller. The electrically controlled telescopic mechanism (4), the first heat pipe (102), the second heat pipe (202) and the third heat pipe (302) are all electrically connected to the controller.

2. The heating device for the multi-layer, multi-cavity laminator according to claim 1, characterized in that, The electrically controlled telescopic mechanism (4) includes four first electrically controlled telescopic rods (401) and four second electrically controlled telescopic rods (402). The first heating unit (1) is connected to the second heating unit (2) through the first electrically controlled telescopic rods (401), and the second heating unit (2) is connected to the third heating unit (3) through the second electrically controlled telescopic rods (402). Both the first electrically controlled telescopic rod (401) and the second electrically controlled telescopic rod (402) are electrically connected to the controller.

3. The heating device for the multi-layer, multi-cavity laminator according to claim 2, characterized in that, Each first electrically controlled telescopic rod (401) is located between the first heating unit (1) and the second heating unit (2), with one end perpendicularly penetrating the top corner of the first heating unit (1) and the other end perpendicularly penetrating the top corner of the second heating unit (2); Each second electrically controlled telescopic rod (402) is located between the second heating unit (2) and the third heating unit (3), with one end perpendicularly penetrating the top corner of the second heating unit (2) and the other end perpendicularly penetrating the top corner of the third heating unit (3); The first electrically controlled telescopic rod (401) can cover the first heating unit (1) and the second heating unit (2), and the second electrically controlled telescopic rod (402) can cover the second heating unit (2) and the third heating unit (3).

4. The heating device for the multi-layer, multi-cavity laminator according to claim 1, characterized in that, The first elastic metal mesh (101), the second elastic metal mesh (201), and the third elastic metal mesh (301) are all made of copper; Both the top insulation panel (103) and the bottom insulation panel (304) are coated with aluminum polyester.

5. The heating device for the multi-layer, multi-cavity laminator according to claim 1, characterized in that, The lower surface of the first lamination plate (104) is provided with a first concave groove, and the upper surface of the second lamination plate (203) located above the second elastic metal mesh (201) is provided with a second upper groove. The first concave groove and the second upper groove form the first lamination cavity. The lower surface of the second laminating plate (203) located below the second elastic metal mesh (201) is provided with a second lower groove, and the upper surface of the third laminating plate (303) is provided with a third groove. The second lower groove and the third groove form the second laminating cavity.

6. The heating device for the multi-layer, multi-cavity laminator according to claim 1, characterized in that, A temperature sensor is installed on the second heating unit (2), and the temperature sensor is electrically connected to the controller.

7. A multi-layer, multi-cavity laminator, characterized in that, Includes a base (6), on which a frame (7) is fixedly installed, and a groove (8) is provided inside the base (6); It also includes heating devices for multiple multi-layer multi-cavity laminators according to any one of claims 1-6, wherein the bottom of the heating device of each multi-layer multi-cavity laminator is fixed to the groove (8) by a telescopic support mechanism (9), and the top of the heating device of each multi-layer multi-cavity laminator is fixed to the frame (7) by a lifting mechanism (10). Both the support mechanism (9) and the lifting mechanism (10) are electrically connected to the controller.

8. The multi-layer, multi-cavity laminator according to claim 7, characterized in that, The control panel (5) is mounted on the outside of the base (6).

9. A lamination method using a multi-layer, multi-cavity laminator, characterized in that, The lamination method of the multi-layer multi-cavity laminator is to laminate the various layers of materials of the photovoltaic module using the multi-layer multi-cavity laminator as described in claim 7 or 8, including the following steps: S1 delivers the materials of each layer of the photovoltaic module to the space between the first heating unit (1) and the second heating unit (2) and / or between the second heating unit (2) and the third heating unit (3), and after the materials of each layer are extruded and heated for a period of time, the materials of each layer are bonded together. S2 involves cooling the bonded layers of material to obtain a photovoltaic module.

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