Photovoltaic module laminating machine, used semi-flexible laminating component and laminating method

Abstract

The invention aims to overcome the defects that a rubber plate of a rubber plate type laminating machine in the prior art is easy to damage, the laminating is non-uniform, a frame needs to be sleeved, the equipment cost input is increased, the requirement of the plate type laminating machine on a rigid laminated plate is high, and a mechanical driving device for driving the laminated plate is difficult to achieve synchronous driving. The invention provides a photovoltaic module laminating machine, a used semi-flexible laminating component and a laminating method, the semi-flexible laminating component for the photovoltaic module laminating machine comprises a rigid laminated board and a high-temperature-resistant elastic sealing piece, the photovoltaic module laminating machine comprises an upper box and a lower box, the upper box comprises an upper box body, the lower box comprises a laminating workbench, and the laminating workbench is arranged on the upper box body. According to the photovoltaic module laminating machine, the semi-flexible laminating component and the laminating method provided by the invention, a frame and a frame return line which are arranged outside the photovoltaic module in a sleeving manner can be omitted, the equipment cost input is reduced, and the photovoltaic module laminating machine has certain fault tolerance on a rigid laminated board during laminating, so that the photovoltaic module can be stressed more uniformly.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic module lamination, and particularly to a photovoltaic module laminator, a semi-flexible lamination component used thereby, and a lamination method. Background Art

[0002] With the continuous development of photovoltaic technology, the size of a single photovoltaic module is getting larger and larger, which makes the size of the upper box of the laminator larger and larger. The deformation amount of the upper box of the laminator in a high-temperature environment is getting larger and larger, resulting in uneven pressure bearing during the encapsulation process of the solar cell module, uneven thickness of the laminated module, and local defects during the encapsulation process of the cell module. The qualified rate of the finished product is low. The utilization rate of the battery chips is insufficient and other phenomena.

[0003] At present, there are mainly two types of lamination for photovoltaic modules. One structure is a rubber plate pressing laminator, and the other is a plate pressing laminator. The structure of the rubber plate pressing laminator mainly includes an upper box and a lower box. A silica gel plate is provided at the opening on the lower end face of the upper box, and the silica gel plate seals the opening of the upper box. The lower box is provided with a lamination workbench. After the upper box and the lower box are closed, a sealed chamber is formed. The silica gel plate divides the sealed chamber into an upper vacuum chamber and a lower vacuum chamber. Both the upper vacuum chamber and the lower vacuum chamber are connected to a vacuum device and an inflation device. During lamination, the lower vacuum chamber is evacuated, and the upper vacuum chamber is inflated, so that the silica gel plate expands downward into the lower vacuum chamber to press the photovoltaic module. With this structure, since the silica gel plate is flexible, with vacuum evacuation below and inflation above, the silica gel plate wraps around the periphery of each photovoltaic module, resulting in a large pressure on the periphery of the photovoltaic module, making the periphery of the photovoltaic module thinner than other parts, causing uneven thickness of the photovoltaic module. Moreover, during the lamination and curing process, the silica gel plate covering the photovoltaic module is frequently stretched, especially at the positions where the four sides of the photovoltaic module are wrapped. The amount of stretching deformation is large, and the silica gel plate is prone to damage under high pressure and high temperature. Currently, the silica gel plate generally needs to be replaced once a month, resulting in downtime and increased maintenance workload. In addition, during the lamination process, in order to prevent the silica gel plate from wrapping around the photovoltaic module and causing uneven lamination of the photovoltaic module, currently, the method of installing a frame outside the photovoltaic module is adopted. With this method, a frame needs to be installed outside each photovoltaic module, and the frame needs to be refluxed using a frame reflux wire, increasing the equipment investment cost and production cost. The plate pressing laminator mainly includes a rigid laminate and a lamination workbench. A pressing frame and a seal are provided on the lower surface of the rigid laminate. When the rigid laminate and the lamination workbench are closed, a sealed chamber is formed. The rigid laminate is driven by a mechanical driving device such as a hydraulic cylinder to combine with vacuum evacuation to laminate the photovoltaic module. For the laminator with this structure, since multiple mechanical driving devices are used, it is very difficult for the actions of the mechanical driving devices to reach coordination and consistency. Moreover, as the size of the photovoltaic module is getting larger and the production capacity requirement of the photovoltaic laminator is getting higher, the size of the rigid laminate is also getting larger, and it works in a high-temperature environment. Therefore, in order to prevent the rigid laminate from deforming, the requirements for its thickness and rigidity are getting higher and higher. Its thickness often reaches more than 100 mm, and in order to laminate the photovoltaic module evenly, the flatness requirement for its surface is also very high, making it difficult to apply in actual production. Summary of the Invention

[0004] The purpose of the present invention is to provide a photovoltaic module laminator, a semi-flexible lamination component used therein, and a lamination method, aiming at the deficiencies of the existing rubber plate laminator in that the rubber plate is easily damaged, the lamination is uneven, and the need to install a frame increases the equipment cost investment, as well as the deficiencies of the plate laminator in that the requirements for the rigid laminate are high and it is very difficult for the mechanical driving devices for driving the laminate to achieve synchronous driving.

[0005] The technical solution for the present invention to solve the technical problems is as follows: A semi-flexible lamination component for a photovoltaic module laminator, comprising a rigid laminate and a high-temperature resistant elastic seal. The high-temperature resistant elastic seal is in a planar shape as a whole, and at least one hollow part is provided thereon. Each hollow part corresponds to a rigid laminate, and the inner periphery of the hollow part is fixedly and sealingly connected to the outer periphery of each rigid laminate; The rigid laminate is rectangular, and the hollow part is a rectangular hole, and / or there is one hollow part; The high-temperature resistant elastic seal is one of a silica gel plate, an elastic airtight fabric, a high-airtightness bio-based aromatic polyester elastomer material, a thermoplastic elastomer with an airtight layer, a high-airtightness bio-based thiophene polyester elastomer material, or a combination of two or more of these materials.

[0006] A photovoltaic module laminator, comprising an upper box and a lower box. The upper box includes an upper box body, and the lower box includes a lamination workbench. The upper box is provided with a lamination component. When the upper box and the lower box are closed, the lamination workbench and the upper box form a sealed cavity, and the sealed cavity is divided into an upper vacuum cavity and a lower vacuum cavity by the lamination component. The lamination component adopts the above-mentioned semi-flexible lamination component, and further includes a laminate support mechanism. The laminate support mechanism is fixedly connected to the rigid laminate to provide support for the semi-flexible lamination component. The outer periphery of the high-temperature resistant elastic seal is located between the pressing frame and the upper box body and is clamped and fixedly arranged between the upper box body and the pressing frame. When the laminator is in a non-laminating position, the semi-flexible lamination component is in a suspended state, and the high-temperature resistant elastic seal is in a relaxed state. When the upper vacuum cavity is inflated, the semi-flexible lamination component moves downward under the action of the inflation pressure and / or under the action of the laminate support mechanism to laminate the photovoltaic module. The high-temperature resistant elastic seal moves downward with the rigid laminate and does not participate in the lamination nor support the rigid laminate. The photovoltaic module is laminated by the rigid laminate; The pressing frame includes an upper pressing frame and a lower pressing frame. The upper pressing frame is fixedly arranged below the upper box body, and the lower pressing frame is fixedly arranged below the upper pressing frame. The periphery of the high-temperature resistant flexible seal is clamped between the upper pressing frame and the lower pressing frame; and / or the laminate support mechanism includes a spring, a fixed shaft and a shaft fixing plate. One end of the fixed shaft is located in the upper vacuum cavity and is fixedly connected to the rigid laminate, and the other end is located outside the upper box body. The fixed shaft is movably connected to the upper box body through a through hole. The upper end of the fixed shaft is fixedly connected to the shaft pressing plate or extends above the shaft pressing plate and is fixed by a nut. The spring is located between the shaft fixing plate and the upper box body. The laminate support mechanism is located in a sealed chamber, and the sealed chamber is communicated with the sealed cavity through a through hole; It also includes a longitudinal backing plate and / or a transverse backing plate. The longitudinal backing plate is arranged along the running direction of the laminator. Longitudinal backing plates are respectively arranged on both sides of the inner surface of the rigid laminate. The longitudinal backing plate is arranged along the length of the rigid laminate to support its entire length. The transverse backing plate includes multiple strips, which are arranged on the inner surface of the rigid laminate at intervals perpendicular to the longitudinal backing plate. The height of the longitudinal backing plate and the transverse backing plate is such that during lamination, both the longitudinal backing plate and the transverse backing plate provide support for the rigid laminate, and the position of the photovoltaic module is located between the transverse backing plates; During the lamination process and the process of the rigid laminate moving downward, the high-temperature resistant elastic sealant has no extension deformation or the extension deformation is less than or equal to 30% of its maximum allowable deformation amount; the laminator is a single-layer one, and the conveyor belt surrounds the lamination workbench; The laminator is a multi-layer one, and each laminator is stacked up and down. The lamination workbench of the laminator in the middle layer, the upper box of the upper laminator and the upper box of the lower laminator are arranged up and down to form a composite box body. The high-temperature resistant conveyor belt of the photovoltaic module surrounds the composite box body. The high-temperature resistant conveyor belt of the photovoltaic module of the upper laminator also serves as the isolation belt of the upper box of the lower laminator.

[0007] A lamination method for a photovoltaic module uses the above-mentioned photovoltaic module laminator. During lamination, after the upper box and the lower box are closed to form a sealed cavity and are divided into an upper vacuum cavity and a lower vacuum cavity by a semi-flexible elastic sealant, first evacuate the lower vacuum cavity. During evacuation, the gas pressure below the rigid laminate decreases, and the rigid laminate descends or remains stationary. After the vacuum degree reaches the process requirements, then inflate the upper vacuum cavity to make the upper vacuum cavity reach the set pressure, so that the rigid laminate presses on the photovoltaic module. The high-temperature resistant elastic sealant only isolates the upper vacuum cavity and the lower vacuum cavity. During the entire lamination process, the high-temperature resistant elastic sealant does not press on the photovoltaic module nor support the rigid laminate; When evacuating the lower vacuum cavity without inflating the upper vacuum cavity, the rigid laminate moves downward with the decrease of the vacuum degree, but does not press on the photovoltaic module. The advantages and beneficial effects of the present invention are: For the semi-flexible lamination component used in the photovoltaic module laminator with the structure of the present invention, since a hollow part is provided in the middle of the high-temperature resistant flexible seal plate, a rigid laminate is provided in the hollow part, and the periphery of the rigid laminate is fixedly and sealedly connected to the hollow part of the high-temperature resistant flexible seal plate. The rigid laminate is used to press on the component, and the high-temperature resistant flexible sealant is used for the sealed connection between the rigid laminate and the laminator. Therefore, during pressing, the high-temperature resistant flexible sealant no longer contacts the photovoltaic module, and only presses on the photovoltaic module through the rigid laminate. The lamination of the photovoltaic module is uniform, the frame and the frame return wire sleeved outside the photovoltaic module can be omitted, reducing the equipment cost investment. During lamination, there is a certain tolerance for the rigid laminate, and the force on the photovoltaic module can be more uniform.

[0008] For the PV module laminator adopting the structure of the present invention, since a semi-flexible lamination component is adopted, when the laminator is in a non-laminating position, the semi-flexible lamination component is in a suspended state and the high-temperature resistant elastic seal is in a relaxed state. When the upper vacuum chamber is inflated, the semi-flexible lamination component moves downward under the action of the inflation pressure and / or under the action of the laminate support mechanism to laminate the PV module. The connection end of the high-temperature resistant elastic seal and the semi-flexible lamination component moves downward accordingly without participating in the lamination and without supporting the rigid laminate. The rigid laminate laminates the PV module, and the gas filled into the upper vacuum chamber provides the lamination pressure. The laminate support mechanism does not apply pressure to the PV module, and the gas is evenly distributed in the upper vacuum chamber. Therefore, compared with the mechanical force providing the lamination pressure, the lamination pressure of the rigid laminate on the PV module is more uniform, and continuous pressure adjustment can be achieved. During the entire lamination process, the semi-flexible high-temperature resistant seal is not affected or is affected by a particularly small tensile force, so it is not easily damaged.

[0009] For the lamination method adopting the present invention, the laminate support mechanism provides a supporting force to overcome the gravity of the rigid laminate, and the high-temperature resistant flexible lamination component does not support the rigid laminate. Therefore, during the entire lamination process, the high-temperature resistant flexible lamination component is not affected or is affected by a very small force, which prolongs its service life. In addition, during the vacuum pumping process of the lower vacuum chamber, the rigid laminate is in a suspended state and does not apply pressure to the PV module, providing a good environment for the overflow of the gas remaining between the layers of the PV module. By inflating the upper vacuum chamber to increase the pressure in the upper vacuum chamber to increase the pressure of the rigid laminate on the PV module, the inflation pressure is evenly distributed, and uniform pressure can be provided to the PV module. Moreover, the rise and fall of the pressure can be continuously adjusted, which is beneficial to the implementation of the lamination process and beneficial to improving the uniformity of lamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural diagram of an embodiment of the laminator box body of the present invention; Figure 2 It is a schematic structural diagram of an embodiment of the laminator of the present invention, which is a single-layer laminator; Figure 3 It is Figure 2 a schematic top view.

[0011] Figure 4 It is a schematic structural diagram of an embodiment of the rigid laminate, which is the surface of the rigid laminate facing the lamination workbench; Figure 5 It is a schematic structural diagram of an embodiment of the semi-flexible lamination component; Figure 6 It is a schematic structural diagram of an embodiment of the external structure of the laminator of the present invention, which is a multi-layer laminator; Figure 7 It is a schematic structural diagram of an embodiment of the multi-layer laminator after removing the conveyor belt.

[0012] Description of Reference Numerals 1-upper box; 2-conveyor belt; 3-laminating workbench; 4-rigid laminate; 5-fixing bolt; 6-spring; 7-fixing shaft; 8-high temperature resistant elastic seal; 11-upper vacuum chamber; 12-transverse pad; 13-assembly position; 15-lower pressing frame; 16-lower vacuum chamber. 17-longitudinal pad; 18-upper pressing frame; 19-sealing chamber; 20-sealing chamber; 21-shaft fixing plate; 22-laminate support mechanism DETAILED DESCRIPTION

[0013] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0014] like Figure 1-7As shown in the figure, the overall structure of the photovoltaic module laminator in the embodiment of the present invention adopts the basic structure of a rubber plate laminator. The difference is that in the present invention, a semi-flexible lamination component is used to replace the silica gel plate in the prior art as the pressing component, and a support structure for the semi-flexible lamination component is added. Its main structure is as follows: It includes an upper box and a lower box. The upper box includes an upper box body, an upper frame, a lower frame, and a semi-flexible lamination component. The upper frame is fixedly arranged around the lower part of the upper box body. The lower frame is located below the upper frame. Both the upper frame and the lower frame form an annular structure. The semi-flexible lamination component includes a rigid laminate and a high-temperature resistant flexible seal. The high-temperature resistant flexible seal is a planar structure with a hollow part. The rigid laminate is located in the hollow position of the high-temperature resistant flexible seal, and its periphery is fixedly and sealedly connected to the hollow periphery of the high-temperature resistant flexible seal. The periphery of the high-temperature resistant flexible seal is located between the upper frame and the lower frame, clamped between the upper frame and the lower frame, and is fixedly and sealedly connected to the upper frame and the lower frame through fixing connection devices such as bolts, or can also be fixedly connected by bonding. The width of the high-temperature resistant flexible seal between the clamping positions of the rigid laminate and the upper and lower pressing frames is greater than or equal to the width between the clamping positions of the rigid laminate and the upper and lower pressing frames. In this way, when in a non-laminating state, the high-temperature resistant flexible laminate can be in a relaxed state. The lower box is located below the upper box. The lower box includes a lamination workbench. The lamination workbench is located below the upper box body and is arranged opposite to the semi-flexible lamination component up and down. When the upper box and the lower box are closed, the lamination workbench and the upper box body form a sealed cavity. The semi-flexible lamination component divides the sealed cavity into an upper vacuum cavity and a lower vacuum cavity. The lower end face of the lower frame is in sealed cooperation connection with the lamination workbench. The upper box also includes a laminate support mechanism for overcoming the self-weight of the semi-flexible lamination component. Under the support of this laminate support mechanism, the high-temperature resistant flexible seal is in an overall relaxed state, that is to say, the high-temperature resistant flexible seal is only affected by its own gravity and not by the gravity of the rigid laminate. Preferably, a length greater than or equal to the moving distance of the laminate is reserved around the high-temperature resistant flexible seal, so that there is no stretching deformation of the high-temperature resistant flexible seal during the lamination process. The high-temperature resistant flexible seal is preferably one of or more than two of silica gel plates, elastic airtight fabrics, high-airtightness bio-based aromatic polyester elastomer materials, thermoplastic elastomers with an airtight layer, and high-airtightness bio-based thiophene polyester elastomer materials. For example, the elastic airtight fabric disclosed in the patent with the patent number 200810021286.6 and the name of Fabric for Airbag and Its Production Method, the high-airtightness bio-based aromatic polyester elastomer disclosed in the patent application number CN202410227400.X and the name of Preparation Method and Application of a High-Airtightness Bio-Based Aromatic Polyester Elastomer Material, and the high-airtightness bio-based thiophene polyester elastomer disclosed in the patent application number CN202410227442.3 and the name of Preparation Method and Application of a High-Airtightness Bio-Based Thiophene Polyester Elastomer Material. The above materials all have high-temperature resistance, good airtight performance, and sufficient tensile strength.

[0015] The laminate support mechanism is located above the flexible laminate and can be arranged outside or inside the upper vacuum chamber. A telescopic cylinder or an elastic support can be used as the laminate support mechanism. When a telescopic cylinder is used as the laminate support mechanism, the output end of the telescopic cylinder is fixedly connected to the upper surface of the rigid laminate. A bleed valve is provided on the air path communicating between the upper and lower chambers of the telescopic cylinder. When the lower vacuum chamber is evacuated, the bleed valve on the air path connected to the lower vacuum chamber opens to exhaust the air from the lower chamber of the telescopic cylinder, causing the rigid laminate to move downward. When the upper vacuum chamber is inflated, the upper chamber of the telescopic cylinder is inflated, causing the rigid laminate to move downward. Preferably, the laminate support mechanism is located outside the upper vacuum chamber body and within the sealed chamber. A preferred structure includes a spring, a fixed shaft, and an adjusting nut. The spring is located between the adjusting nut and the upper box body and is sleeved outside the fixed shaft. The lower end of the fixed shaft is located inside the upper box body and is fixedly connected to the upper surface of the rigid laminate. A spring limit plate is provided at its upper end, and an adjusting nut is provided outside the spring limit plate and is threadedly connected to the fixed shaft to adjust the elasticity of the spring so that the spring can overcome the self-weight of the rigid laminate. Usually, multiple laminate support mechanisms are fixedly connected to the rigid laminate to balance the rigid laminate, and preferably, the rigid laminate is kept horizontal during lifting and lowering. The fixed shaft passes through the through hole provided on the upper box body. When in a non-laminating state such as the loading or unloading state, the laminate support mechanism supports the rigid laminate away from the laminating workbench. When laminating, the upper box and the lower box are closed, and the upper vacuum chamber is inflated. The balanced force on both sides of the rigid laminate is broken, and the pressure above is greater than the supporting force of the laminate support mechanism, so the rigid laminate moves downward to press the component. During this process, due to the supporting effect of the elastic support device on the rigid laminate, its gravity is overcome, and the width of the high-temperature resistant flexible seal at the pressed part of the rigid laminate, the upper pressing frame, and the lower pressing frame is greater than or equal to the distance between them. Therefore, during the entire laminating process, the high-temperature resistant flexible seal is basically not affected by force and only serves as a seal or is subjected to a very small tensile force. Therefore, the high-temperature resistant flexible seal is not easily damaged and has a long service life. In theory, its service life is only affected by the high-temperature environment and its own aging. In actual production practice, the service life of the high-temperature resistant flexible seal is affected by the tensile force it receives during the laminating process. When the width of the high-temperature resistant flexible seal is less than the distance between the rigid laminate and the pressing frame, causing the high-temperature resistant flexible seal to be tensioned, the service life of the high-temperature resistant flexible seal will decrease after the upper vacuum chamber is inflated. However, under the action of the laminate support mechanism, its service life far exceeds that of the existing silicone plate used as a laminating part. Taking the silicone plate as an example, in the existing structure, when the silicone plate is used solely as the pressing component, its service life is 2-3 months. With the structure of the present invention, its service life can be increased to one replacement per year. The laminate support mechanism provides the supporting force to overcome the self-gravity of the rigid laminate.Through reasonable design, for example, by increasing the width of the high-temperature resistant flexible seal, the high-temperature resistant seal can be made to be not stressed during the entire lamination process, which will further improve the service life of the high-temperature resistant flexible seal. In the present invention, the rigid laminate needs to be kept horizontal so that the lamination pressure is uniform.

[0016] For the laminating press adopting the structure of the present invention, its working process is as follows: The rigid laminate is supported by the laminate support mechanism. The upper box descends under the drive of the driving device and closes with the lower box to form a vacuum chamber. The chamber above the rigid laminate forms an upper vacuum chamber, and the chamber below the rigid laminate forms a lower vacuum chamber. The lower vacuum chamber and the upper vacuum chamber are respectively connected to the vacuum pumping device and the gas charging device. The lower vacuum chamber is evacuated, and then gas is charged above the rigid laminate. The rigid laminate moves downward under the action of the charging pressure and the lower vacuum, and at the same time drives the high-temperature resistant flexible seal to stretch and move downward, and presses the photovoltaic module by the rigid laminate. After lamination, the upper vacuum chamber exhausts gas, the lower vacuum chamber is charged with gas, and the upper box and the lower box are separated to transmit the photovoltaic module out of the lamination chamber.

[0017] To prevent the rigid laminate from being deformed due to uneven stress caused by the vacancy of the photovoltaic module during lamination, elastic support plates are arranged at intervals below the rigid laminate. The positions of the elastic support plates should avoid the positions of the photovoltaic modules. It can be that elastic support plates are arranged on both sides of the lamination position of each photovoltaic module, or elastic support plates are arranged on both sides of the lamination positions of multiple photovoltaic modules. The elastic support plates are arranged along the length direction of the rigid laminate. The thickness of the elastic support plates is the same as or slightly greater than the thickness of the photovoltaic module. After lamination, its thickness is equal to the thickness of the photovoltaic module, so that it does not affect the pressing of the photovoltaic module and can play a role in supporting the rigid laminate. With this structure, during the lamination process, the rigid laminate is supported by the elastic support plates to prevent the rigid laminate from deforming. Transverse cushion strips can also be arranged along the length direction at both ends of the width of the rigid laminate below the lower pressing frame to support the two long ends of the rigid laminate to prevent the two ends of the rigid laminate from deforming in the length direction during lamination.

[0018] A heating device or a cooling device can be arranged in the lamination workbench. When a heating device is arranged, the laminating press is a lamination curing laminating press, and when a cooling device is arranged, it is a cooling machine.

[0019] The laminator of the present invention can be provided with a rigid laminate in a sealed cavity, or multiple rigid laminates can be provided in a sealed cavity. The positions of the multiple rigid laminates are arranged corresponding to the positions of the photovoltaic modules. Each rigid laminate corresponds to at least one position of the photovoltaic module, or one rigid laminate can correspond to the positions of multiple photovoltaic modules. The rigid laminates are fixedly and hermetically connected by high-temperature resistant elastic seals. Each rigid laminate is provided with at least one laminate support device. With this structure, the number of photovoltaic modules pressed by the rigid laminate can be reduced, the requirement for the position accuracy of the rigid laminate can be reduced, and different thickness and different shape photovoltaic modules can be pressurized in the same lamination cavity.

[0020] The photovoltaic module laminator with the structure of the present invention can be single-layer or multi-layer. When it is a multi-layer structure, the laminators are stacked up and down. For the laminator in the middle layer, the high-temperature resistant conveyor belt of the photovoltaic module of the upper laminator also serves as the isolation belt of the upper box of the lower laminator, that is, the lamination workbench of the upper laminator and the upper box of the lower laminator are arranged up and down to form a composite box, and the high-temperature resistant conveyor belt of the photovoltaic module surrounds the composite box.

[0021] The laminator adopting the structure of the present invention has the following advantages: 1. High-temperature resistant seals such as silica gel plates do not contact the components. High-temperature resistant flexible seals such as silica gel plates can only play the role of vacuum sealing. When the initial design of the silica gel plate reserves the moving distance length of the laminate, there is no stretching deformation of the silica gel plate during the lamination process, which greatly improves the service life of the silica gel plate. The replacement frequency of the silica gel plate is increased from once every 3 months in the prior art to once a year.

[0022] 2. The use of the frame is cancelled, saving the frame return wire and reducing the number of employees.

[0023] 3. Compared with the flat pressing structure in the prior art, the requirement for the strength of the laminate is reduced, reducing its processing difficulty. There is no need to set up a structural frame to improve its strength to prevent the peripheral warping of the laminate due to thermal deformation, effectively solving the problem that the vacuum degree cannot be increased due to deformation.

[0024] 4. This structure can perform integral lamination or component-by-component lamination. The single-component laminates are connected by high-temperature resistant flexible materials. The upper vacuum chamber can be integral or single-component chamber.

[0025] 5. Padding plates are added in the horizontal and vertical directions, which can be added on the laminate or on the lower heating plate. The padding plates can solve the problem of thermal warping on both sides of the laminate, and at the same time solve the problem of deformation of the rigid laminate at the component-lacking position caused by the uncertain number of components entering the lamination cavity during the lamination process.

Claims

1. A semi-flexible lamination component for a photovoltaic module laminator, characterized in that: It includes a rigid laminate and a high-temperature resistant elastic seal. The high-temperature resistant elastic seal is in a planar shape as a whole, and at least one hollow part is provided thereon. Each hollow part is correspondingly provided with a rigid laminate, and the inner periphery of the hollow part is fixedly and sealingly connected to the outer periphery of each rigid laminate.

2. The semi-flexible lamination component for a photovoltaic module laminator according to claim 1, characterized in that: The rigid laminate is rectangular, and the hollow part is a rectangular hole, and / or there is one hollow part.

3. The semi-flexible lamination component for a photovoltaic module laminator according to claim 1 or 2, characterized in that: The high-temperature resistant elastic seal is one of a silica gel plate, an elastic airtight fabric, a high-airtightness bio-based aromatic polyester elastomer material, a thermoplastic elastomer with an airtight layer, a high-airtightness bio-based thiophene polyester elastomer material, or two or more of these materials.

4. A photovoltaic module laminator, comprising an upper box and a lower box. The upper box includes an upper box body, and the lower box includes a lamination workbench. The upper box is provided with lamination components. When the upper box and the lower box are closed, the lamination workbench and the upper box form a sealed cavity, and the sealed cavity is divided into an upper vacuum cavity and a lower vacuum cavity by the lamination components. It is characterized in that, The laminated component adopts the semi-flexible laminated component described in any one of claims 1-3, and further includes a laminate support mechanism. The laminate support mechanism is fixedly connected to the rigid laminate to provide support for the semi-flexible laminated component. The outer periphery of the high-temperature resistant elastic seal is located between the pressing frame and the upper box body and is clamped and fixedly arranged between the upper box body and the pressing frame. When the laminator is in a non-laminating position, the semi-flexible laminated component is in a suspended state, and the high-temperature resistant elastic seal is in a relaxed state. When the upper vacuum chamber is inflated, the semi-flexible laminated component moves downward to laminate the photovoltaic module under the action of the inflation pressure and / or under the action of the laminate support mechanism. The high-temperature resistant elastic seal moves downward with the rigid laminate and does not participate in the lamination nor support the rigid laminate. The photovoltaic module is laminated by the rigid laminate.

5. The laminator for a photovoltaic module according to claim 4, wherein The pressing frame includes an upper pressing frame and a lower pressing frame. The upper pressing frame is fixedly arranged below the upper box body, and the lower pressing frame is fixedly arranged below the upper pressing frame. The periphery of the high-temperature resistant flexible seal is clamped between the upper pressing frame and the lower pressing frame; and / or the laminate support mechanism includes a spring, a fixed shaft, and a shaft fixing plate. One end of the fixed shaft is located in the upper vacuum chamber and is fixedly connected to the rigid laminate, and the other end is located outside the upper box body. The fixed shaft is movably connected to the upper box body through a through hole. The upper end of the fixed shaft is fixedly connected to the shaft pressing plate or extends above the shaft pressing plate and is fixed by a nut. The spring is located between the shaft fixing plate and the upper box body. The laminate support mechanism is located in a sealed chamber, and the sealed chamber is communicated with the sealed cavity through a through hole.

6. The laminator for photovoltaic modules according to claim 4, wherein, It further includes a longitudinal cushion plate and / or a transverse cushion plate. The longitudinal cushion plate is arranged along the running direction of the laminator. Longitudinal cushion plates are respectively arranged on both sides of the inner surface of the rigid laminate. The longitudinal cushion plates are arranged along the length of the rigid laminate to support its entire length. The transverse cushion plates include multiple ones, which are arranged on the inner surface of the rigid laminate at intervals perpendicular to the longitudinal cushion plates. The height of the longitudinal cushion plate and the transverse cushion plate is such that during lamination, both the longitudinal cushion plate and the transverse cushion plate provide support for the rigid laminate, and the position of the photovoltaic module is located between the transverse cushion plates.

7. The laminator for a photovoltaic module according to claim 4, wherein, During the lamination process and the process of the rigid laminate moving downward, the high-temperature resistant elastic seal has no elongation deformation or the elongation deformation is less than or equal to 30% of its maximum allowable deformation; the laminator is single-layer, and the conveyor belt surrounds the lamination workbench.

8. The laminator for a photovoltaic module according to claim 4, wherein, The laminator is multi-layered, and the laminators are stacked on top of each other. The laminator in the middle layer, the laminating workbench of the upper laminator, and the upper box of the lower laminator are arranged vertically to form a composite box. The high-temperature resistant conveyor belt for photovoltaic modules surrounds the composite box, and the high-temperature resistant conveyor belt for photovoltaic modules of the upper laminator also serves as the isolation belt for the upper box of the lower laminator.

9. A lamination method for a photovoltaic module, characterized in that, Using the photovoltaic module laminator described in claim 4, when laminating, after the upper box and the lower box are closed to form a sealed cavity and are divided into an upper vacuum cavity and a lower vacuum cavity by a semi-flexible elastic seal, first evacuate the lower vacuum cavity. When evacuating, the gas pressure below the rigid laminate decreases, and the rigid laminate descends or remains stationary. After the vacuum degree reaches the process requirements, then inflate the upper vacuum cavity to make the upper vacuum cavity reach the set pressure, so that the rigid laminate presses on the photovoltaic module. The high-temperature resistant elastic seal only isolates the upper vacuum cavity and the lower vacuum cavity. During the entire laminating process, the high-temperature resistant elastic seal does not exert pressure on the photovoltaic module nor support the rigid laminate.

10. A lamination method for a photovoltaic module according to claim 1, characterized in that, When evacuating the lower vacuum cavity without inflating the upper vacuum cavity, the rigid laminate moves down with the decrease in vacuum degree but does not exert pressure on the photovoltaic module.

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