Photovoltaic module

Abstract

The invention discloses a photovoltaic module, which comprises a first glass plate and a second glass plate, and is characterized in that the first glass plate is located above the second glass plate; the battery structure and the sealant are both installed between the first glass plate and the second glass plate, the sealant is distributed around the battery structure, and the battery structure comprises a battery piece and adhesive films located on the two sides of the battery piece; wherein an annular separation part is arranged between the first glass plate and the second glass plate, and the annular separation part is located between the sealant and the battery structure and separates the sealant from the battery structure. According to the photovoltaic module, the glue penetration phenomenon of the glue film and the sealant in the laminating process can be avoided, so that the water resistance of the sealant can be improved, external moisture, dust and the like can be prevented from entering the battery pieces, the sealing effect of the photovoltaic module is improved, and the reliability of the photovoltaic module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic cells, and in particular to a photovoltaic module. Background Art

[0002] In order to enhance the water-blocking ability of photovoltaic modules (especially heterojunction modules) and improve the long-term reliability of photovoltaic modules, the industry usually adopts the following methods: use low water permeability and low water absorption films such as ethylene-butylene copolymer (POE); or use high water-blocking butyl sealant to seal the edges of the modules. Among them, during the high-temperature lamination and extrusion process, the butyl sealant will flow or slide irregularly between the glass. If the film flows or slides along the flow of the butyl sealant to the outside of the glass, it will cause the butyl sealant to penetrate the glue, resulting in sealing failure or reduced water-blocking effect. There is room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a photovoltaic module that can avoid the penetration of the adhesive film and butyl adhesive during the lamination process, thereby improving the water barrier of the butyl adhesive, preventing external moisture and dust from entering the battery cell, thereby improving the sealing effect of the photovoltaic module and improving the reliability of the photovoltaic module.

[0004] A photovoltaic module according to an embodiment of the present invention comprises: a first glass plate and a second glass plate, wherein the first glass plate is located above the second glass plate; a battery structure and a sealant, wherein the battery structure and the sealant are both installed between the first glass plate and the second glass plate, and the sealant is distributed around the battery structure, wherein the battery structure comprises a battery cell and a glue film located on both sides of the battery cell; wherein an annular partition is provided between the first glass plate and the second glass plate, and the annular partition is located between the sealant and the battery structure and separates the sealant from the battery structure.

[0005] According to the photovoltaic module of the embodiment of the present invention, the butyl rubber and the adhesive film can be separated by arranging an annular partition between the first glass plate and the second glass plate, and the penetration of the adhesive film and the butyl rubber during the lamination process can be avoided, thereby improving the water barrier of the butyl rubber and preventing external moisture and dust from entering the battery cell, thereby improving the sealing effect of the photovoltaic module and enhancing the reliability of the photovoltaic module.

[0006] According to the photovoltaic assemblies of some embodiments of the present invention, the annular partition is configured as a partition convex ring that protrudes from a surface of the second glass plate toward the first glass plate.

[0007] According to some embodiments of the photovoltaic assembly of the present invention, a height of the annular partition protruding from the surface of the second glass plate is less than or equal to a distance between the first glass plate and the second glass plate.

[0008] According to some embodiments of the photovoltaic modules of the present invention, the height of the annular partition protruding from the surface of the second glass plate is greater than the sum of the thickness of the cell and the thickness of one of the adhesive films.

[0009] According to the photovoltaic assemblies of some embodiments of the present invention, the annular partition is configured as a partition convex ring that protrudes from the surface of the first glass plate toward the second glass plate, and the partition convex ring extends to the surface of the second glass plate.

[0010] According to some embodiments of the photovoltaic assembly of the present invention, the second glass plate is formed with an insertion groove open toward the first glass plate, and the separation protrusion ring is inserted into the insertion groove toward the second glass plate.

[0011] According to some embodiments of the photovoltaic assembly of the present invention, the annular partition divides the space between the first glass plate and the second glass plate into an inner installation space and an outer installation space, the battery structure is located in the inner installation space, and the sealant is located in the outer installation space.

[0012] According to some embodiments of the photovoltaic assembly of the present invention, a surface of the second glass plate facing the outer installation space is configured as a flat surface, and a surface of the second glass plate facing the inner installation space is configured as a patterned surface.

[0013] According to some embodiments of the photovoltaic assembly of the present invention, the distance between the annular partition and the edge of the first glass plate or the edge of the second glass plate is D1, and satisfies: 9 mm ≤ D1 ≤ 11 mm.

[0014] According to some embodiments of the photovoltaic assembly of the present invention, the width of the annular partition is a, and satisfies: 0.25 mm ≤ a ≤ 0.35 mm;

[0015] And / or, the height of the annular partition is b, and satisfies: 0.5 mm ≤ b ≤ 0.9 mm.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1is a schematic structural diagram of a photovoltaic assembly according to an embodiment of the present invention;

[0019] Figure 2 is a partial schematic diagram of a first glass plate or a second glass plate of a photovoltaic assembly according to an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of a first glass plate or a second glass plate of a photovoltaic assembly according to an embodiment of the present invention;

[0021] Figure 4 is a schematic structural diagram of a photovoltaic assembly according to another embodiment of the present invention.

[0022] Reference numerals:

[0023] Photovoltaic module 100,

[0024] The first glass plate 1 , the second glass plate 2 , the annular partition 21 , the inner installation space 22 , the patterned surface 221 , the outer installation space 23 , the plane 231 , the plug-in slot 24 , the battery structure 3 , the battery cell 31 , the adhesive film 32 , and the sealant 4 . DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Reference below Figure 1-Figure 4 The photovoltaic module 100 according to an embodiment of the present invention is described. By setting an annular partition 21 between the first glass plate 1 and the second glass plate 2, the butyl rubber and the adhesive film 32 can be separated, and the adhesive penetration between the adhesive film 32 and the butyl rubber during the lamination process can be avoided, thereby improving the water barrier of the butyl rubber, preventing external moisture and dust from entering the battery cell 31, thereby improving the sealing effect of the photovoltaic module 100, thereby improving the reliability of the photovoltaic module 100, and the structure is simple, the processing is convenient, and the cost is low.

[0029] like Figure 1-Figure 4 As shown, a photovoltaic assembly 100 according to an embodiment of the present invention includes: a first glass plate 1 , a second glass plate 2 , a battery structure 3 and a sealant 4 .

[0030] The first glass plate 1 is located above the second glass plate 2 . The battery structure 3 and the sealant 4 are installed between the first glass plate 1 and the second glass plate 2 . The sealant 4 is distributed around the battery structure 3 . The battery structure 3 includes a battery cell 31 and adhesive films 32 located on both sides of the battery cell 31 .

[0031] Specifically, the first glass plate 1 and the second glass plate 2 form the upper and lower protective layers of the battery structure 3. Their main function is to protect the battery structure 3 from damage caused by the external environment (such as moisture, dust, etc.), and also play a certain mechanical protection role to prevent damage to the battery caused by physical impact.

[0032] The first glass plate 1 and the second glass plate 2 can be spaced apart and distributed in the vertical direction, so that the battery structure 3 and the sealant 4 can be installed between the first glass plate 1 and the second glass plate 2, and the two can be distributed in parallel, which is conducive to better fitting and installing the battery structure 3 and the sealant 4. The first glass plate 1 is located above the second glass plate 2, so that the lower side of the first glass plate 1 can be connected to the upper side of the battery structure 3 and the sealant 4, and the upper side of the second glass plate 2 can be connected to the lower side of the battery structure 3 and the sealant 4, so as to achieve the installation of the photovoltaic module 100. The sealant 4 can be butyl rubber, which has good water resistance and can form an edge seal at the edge of the battery structure 3, which can prevent moisture and impurities from entering the battery structure 3 and improve the service life of the battery structure 3.

[0033] The sealant 4 is distributed around the battery structure 3, that is, the sealant 4 is located on the outside of the battery structure 3, and the battery structure 3 can be sealed. The battery structure 3 includes a battery cell 31 and a glue film 32. The battery cell 31 is the power generation body of the photovoltaic module 100, which is usually made of silicon material and can convert sunlight into electrical energy. The two sides of the battery cell 31 are connected to the first glass plate 1 and the second glass plate 2 through the glue film 32, respectively, so that the connection of the battery cell 31 can be stable and reliable. Among them, the glue film 32 can be ethylene-butene copolymer (POE), which has the characteristics of low water permeability and low water absorption, and both sides of the battery cell 31 can be protected by the glue film 32, thereby improving the characteristics of the battery structure 3. The water-blocking performance of the glue film 32 is not as good as that of butyl rubber, and butyl rubber can be distributed around the glue film 32 to improve the overall water-blocking properties of the photovoltaic module 100. The adhesive film 32 is light-transmissive and meets the light absorption requirements of the battery cell 31 . The battery cell 31 is relatively brittle. Filling the adhesive film 32 between the battery cell 31 and the first glass plate 1 and the second glass plate 2 can effectively protect the battery cell 31 and increase the service life of the battery cell 31 .

[0034] An annular partition 21 is disposed between the first glass plate 1 and the second glass plate 2 . The annular partition 21 is located between the sealant 4 and the battery structure 3 and separates the sealant 4 from the battery structure 3 .

[0035] Specifically, the annular partition 21 has a separation function between the first glass plate 1 and the second glass plate 2, and the annular partition 21 is an annular structure. The annular partition 21 is distributed around the battery structure 3 and is located between the sealant 4 and the battery structure 3, so as to separate the sealant 4 from the battery structure 3 and avoid direct contact between the sealant 4 and the battery structure 3, thereby achieving effective isolation between the two, and has a simple structure, convenient processing and low cost.

[0036] The annular partition 21 may be disposed on the first glass plate 1 or on the second glass plate 2 , as long as it can play a separation role.

[0037] In this embodiment, there are two adhesive films 32, namely, a first adhesive film 32 and a second adhesive film 32. During installation, the first glass plate 1, the first adhesive film 32, the battery cell 31, the second adhesive film 32 and the second glass plate 2 are stacked in sequence in the up-down direction, and the sealant 4 is placed on the outside of the first adhesive film 32, the battery cell 31 and the second adhesive film 32. After the photovoltaic module 100 is assembled, it is laminated by a laminator, and the bottom of the photovoltaic module 100 is placed on the upper side of the heating base plate, and the top of the photovoltaic module 100 is located on the lower side of the adhesive film. By inflating and pressurizing one side of the adhesive film, the air in the photovoltaic module 100 can be discharged, and the adhesive film can be pressed toward the battery cell 31 by inflating and pressurizing. Then, by heating the heating base plate, the two adhesive films 32 and the sealant 4 can be melted, and the battery cell 31, the first glass plate 1 and the second glass plate 2 are bonded together to form a sealed photovoltaic module 100. After the packaging is completed, the pressure on one side of the adhesive film is removed and the heating of the heating base plate is turned off, and the photovoltaic module 100 can be removed.

[0038] Therefore, when the traditional photovoltaic module 100 is in the high-temperature lamination and extrusion process, the two adhesive films 32 and the sealant 4 will flow after melting, and the fluidity of butyl rubber is poor. The butyl rubber will flow or slide irregularly between the glasses. If the adhesive film 32 flows along the butyl rubber or slides to the outside of the glass, it will cause the butyl rubber to penetrate, thereby reducing the sealing effect of the butyl rubber. In this embodiment, an annular partition 21 is provided between the first glass plate 1 and the second glass plate 2, that is, an insulator is formed between the butyl rubber and the adhesive film 32, so that the butyl rubber and the adhesive film 32 can be completely separated, and the adhesive film 32 and the butyl rubber penetration phenomenon during the lamination process can be avoided, thereby improving the water resistance of the butyl rubber, and preventing external moisture and dust from entering the battery cell 31, thereby improving the sealing effect of the photovoltaic module 100, so as to improve the reliability of the photovoltaic module 100, and the structure is simple, the separation effect is good, and it is more reliable to use.

[0039] In some embodiments, the annular partition 21 is configured as a partition protrusion protruding from the surface of the second glass plate 2 toward the first glass plate 1 .

[0040] Specifically, the annular partition 21 is configured as a partition convex ring, and the partition convex ring can be arranged to protrude toward the first glass plate 1 on the surface of the second glass plate 2, such as Figure 1As shown, the separation convex ring protrudes upward from the surface of the second glass plate 2, that is, the bottom end of the separation convex ring can be set to be connected to the second glass plate 2, and the connection and fixation of the separation convex ring can be realized to maintain the structural strength of the separation convex ring and the second glass plate 2, so that the annular separation portion 21 has a good barrier effect. The outer side of the separation convex ring is distributed with sealant 4, and the inner side is distributed with battery cells 31 and adhesive film 32, and the separation convex ring is distributed around the battery structure 3 and the sealant 4, so that the sealant 4 and the battery cells 31 and the adhesive film 32 are effectively separated in a circumferential circle through the separation convex ring, and the separation is more reliable and the structure is simple.

[0041] Therefore, during the high-temperature lamination and extrusion process, after the adhesive film 32 and the sealant 4 melt due to the high temperature, the pressure of the laminator on the assembly causes the adhesive film 32 and the sealant 4 to flow to both sides. At this time, the separation convex ring on the glass is like building a dam on the second glass plate 2, which can form a hard separation, and can block the possibility of the sealant 4 flowing toward the adhesive film 32, and can block the possibility of the adhesive film 32 flowing toward the sealant 4, so as to effectively isolate the contact between the sealant 4 and the adhesive film 32, thereby reducing the risk of glue penetration of the photovoltaic module 100 and reducing the degradation of the photovoltaic module 100 caused by glue penetration.

[0042] In some embodiments, the height of the annular partition 21 protruding from the surface of the second glass plate 2 is less than or equal to the distance between the first glass plate 1 and the second glass plate 2 .

[0043] Specifically, the height of the annular partition 21 protruding from the surface of the second glass plate 2 depends on the distance between the first glass plate 1 and the second glass plate 2. In actual design, the protruding height of the annular partition 21 can be set equal to the distance between the first glass plate 1 and the second glass plate 2, or the protruding height of the annular partition 21 can be set less than the distance between the first glass plate 1 and the second glass plate 2. The setting method is diverse and can be selectively set according to actual needs.

[0044] When the protruding height of the annular partition 21 is set to be equal to the distance between the first glass plate 1 and the second glass plate 2, that is, there is no gap between the top of the annular partition 21 and the first glass plate 1, one end of the annular partition 21 can be connected to the second glass plate 2, and the other end can be pressed against the first glass plate 1, which can improve the supporting strength of the annular partition 21 on the first glass plate 1 and the second glass plate 2, and avoid contact between the sealant 4 and the adhesive film 32 on both sides of the annular partition 21. In addition, when the protruding height of the annular partition 21 is set to be less than the distance between the first glass plate 1 and the second glass plate 2, that is, there is a gap between the top of the annular partition 21 and the first glass plate 1, in this way, during the high-temperature lamination and extrusion process, the first glass plate 1 can be moved toward the second glass plate 2 after being subjected to pressure, so as to improve the bonding tightness between the first glass plate 1, the adhesive film 32, the battery cell 31 and the second glass plate 2.

[0045] Furthermore, the height of the annular partition 21 protruding from the surface of the second glass plate 2 cannot be set too small. If it is too small, there will be a large gap between the annular partition 21 and the first glass plate 1, which may cause the sealant 4 and the adhesive film 32 to penetrate, and the penetration of the glue will cause the sealing effect of the photovoltaic module 100 to be reduced. In addition, the height of the annular partition 21 protruding from the surface of the second glass plate 2 cannot be set too large. If it is too large, it will exceed the distance between the first glass plate 1 and the second glass plate 2. Although it will effectively isolate the sealant 4 and the adhesive film 32, it will make the adhesion between the adhesive film 32 or the sealant 4 and the first glass plate 1 and the second glass plate 2 poor, thereby reducing the overall connection reliability and sealing of the photovoltaic module 100.

[0046] In some embodiments, the height of the annular partition 21 protruding from the surface of the second glass plate 2 is greater than the sum of the thickness of the battery cell 31 and the thickness of one adhesive film 32, that is, the height of the annular partition 21 protruding from the surface of the second glass plate 2 is more than half of the distance between the second glass plate 2 and the first glass plate 1, so that the blocking effect of the annular partition 21 between the battery structure 3 and the sealant 4 can be improved.

[0047] Specifically, the two adhesive films 32 have the same thickness, and the battery cell 31 is located between the two adhesive films 32, that is, the protruding thickness of the annular partition 21 needs to be greater than the thickness of the battery cell 31 and the thickness of one adhesive film 32, and during the high-temperature lamination and extrusion process, the second glass plate 2 is located above the heated bottom plate, that is, the temperature of the adhesive film 32 between the second glass plate 2 and the battery cell 31 will be higher, and the height of the protrusion of the annular partition 21 on the surface of the second glass plate 2 is set to be greater than the sum of the thicknesses of the lower adhesive film 32 and the battery cell 31, which can effectively separate the lower adhesive film 32 and the battery cell 31 from the sealant 4, avoid the flow between the lower adhesive film 32 and the sealant 4, and avoid the sealant 4 flowing to the side of the battery cell 31, and the first glass plate 1 will move toward the direction of the second glass plate 2 when under pressure, so that the upper and lower ends of the sealant 4 can be reliably bonded to the first glass plate 1 and the second glass plate 2, thereby reducing the risk of penetration of the sealant 4 and the adhesive film 32.

[0048] In some embodiments, the annular partition 21 is configured as a partition protrusion ring protruding from the surface of the first glass plate 1 toward the second glass plate 2 , and the partition protrusion ring extends to the surface of the second glass plate 2 .

[0049] Specifically, the annular separator 21 can also be arranged on the first glass plate 1, and the annular separator 21 is constructed as a separator convex ring, which is arranged to convex from the surface of the first glass plate 1 toward the second glass plate 2, and the separator convex ring convexes downward from the surface of the first glass plate 1, that is, the top of the separator convex ring can be arranged to be connected to the first glass plate 1, and the connection and fixation of the separator convex ring can be realized to maintain the structural strength of the separator convex ring and the first glass plate 1, so that the annular separator 21 has a good barrier effect. The outer side of the separator convex ring is distributed with sealant 4, and the inner side is distributed with battery cells 31 and adhesive film 32, and the separator convex ring is distributed around the battery structure 3 and the sealant 4, and the separator convex ring extends to the surface of the second glass plate 2, that is, the separator convex ring can be pressed against the second glass plate 2, so that the separator convex ring can separate the battery structure 3 and the sealant 4 at the upper and lower spacing between the first glass plate 1 and the second glass plate 2, and the sealant 4 and the battery cells 31 and the adhesive film 32 are effectively separated by the separator convex ring in a circumferential circle, and the separation is more reliable and the structure is simple.

[0050] Therefore, through the above arrangement, the supporting strength of the annular partition 21 on the first glass plate 1 and the second glass plate 2 can be improved, and the contact between the sealant 4 and the adhesive film 32 on both sides of the annular partition 21 can be avoided.

[0051] In some embodiments, the second glass plate 2 is formed with an inserting groove 11 open toward the first glass plate 1 , and the separating protruding ring is inserted into the inserting groove 11 toward the second glass plate 2 .

[0052] Specifically, Figure 4 As shown, the second glass plate 2 is formed with a plug-in groove 11, which is open toward the first glass plate 1, and the plug-in groove 11 is also constructed as an annular structure, and the separation convex ring is arranged corresponding to the plug-in groove 11, which is conducive to the accurate plug-in matching of the two, and the separation convex ring extends toward the second glass plate 2, and its extension length is greater than the distance between the first glass plate 1 and the second glass plate 2, so that the separation convex ring can be plugged into the plug-in groove 11 from the open side of the plug-in groove 11, so as to realize the plug-in matching of the first glass plate 1 and the second glass plate 2. And the structure is simple, the processing is convenient, and the connection is more reliable.

[0053] Therefore, by setting the insertion fit between the separation protrusion and the insertion groove 11, the connection strength of the separation protrusion between the first glass plate 1 and the second glass plate 2 can be improved, and the effective separation of the battery structure 3 and the sealant 4 by the separation protrusion can be improved, so that the photovoltaic component 100 can avoid the possibility of glue penetration between the adhesive film 32 and the sealant 4 during the high-temperature lamination process, and can improve the firmness and stability of the bonding between the battery cell 31, the adhesive film 32, the first glass plate 1 and the second glass plate 2.

[0054] The structure of the annular separator 21 can be configured as a square, semicircular, or other separating convex ring, and the shape of the plug-in groove 11 is matched with the forming of the separating convex ring, so as to satisfy the reliable plug-in connection between the separating convex ring and the plug-in groove 11, and the annular separator 21 can be configured as a separate separating convex ring in the form of a boss, or can be configured as a separating convex ring in the form of a step, such as Figure 2 and Figure 3 As shown, it can also be arranged in a form of multiple steps spliced ​​together, that is, at least two steps are formed between the first glass plate 1 and the second glass plate 2. The arrangement method is diverse and can be flexibly selected.

[0055] When the annular partition 21 is set as a step-shaped partition convex ring, during the component lamination process, under the action of high temperature and pressure, the adhesive film 32 melts and flows. Since the butyl rubber is filled in the step-shaped partition convex ring, it is in an embedded form and its flow process is blocked by the step portion, which effectively blocks the melting of the adhesive film 32, thereby reducing and lowering the risk of the adhesive film 32 flowing through the butyl rubber and forming a rubber penetration.

[0056] In some embodiments, the annular partition 21 divides the space between the first glass plate 1 and the second glass plate 2 into an inner installation space 22 and an outer installation space 23 , the battery structure 3 is located in the inner installation space 22 , and the sealant 4 is located in the outer installation space 23 .

[0057] Specifically, the annular partition 21 is arranged between the first glass plate 1 and the second glass plate 2, and the space therebetween can be divided into an inner installation space 22 and an outer installation space 23. Since the annular partition 21 is a ring-shaped structure, the outer installation space 23 can be distributed around the inner installation space 22, and the spatial dimension of the inner installation space 22 is larger than the spatial dimension of the outer installation space 23. The inner installation space 22 is used to accommodate the battery structure 3, and the outer installation space 23 is used to accommodate the sealant 4. The spatial dimension of the inner installation space 22 is matched with the specifications of the battery cell 31 to form photovoltaic modules 100 of different specifications.

[0058] Therefore, by setting the annular partition 21, the inner installation space 22 and the outer installation space 23 can be separated, and the battery structure 3 and the sealant 4 can be separated, which can prevent the glue film 32 and the sealant 4 from penetrating during the high-temperature lamination process, and can make the installation of the battery structure 3 and the sealant 4 simpler and more convenient, and can make the assembly accuracy of the battery structure 3 and the sealant 4 high, thereby improving the overall assembly efficiency of the photovoltaic module 100 and improving the production capacity of the photovoltaic module 100.

[0059] In some embodiments, the surface of the second glass plate 2 facing the outer installation space 23 is configured as a plane 231 , and the surface of the second glass plate 2 facing the inner installation space 22 is configured as a patterned surface 221 .

[0060] Specifically, Figure 2 As shown, the surface of the second glass plate 2 in the external installation space 23 is set to a plane 231, that is, no embossing treatment is performed, so that the surface in the external installation space 23 can be made flatter and smoother, and the surface of the first glass plate 1 facing the second glass plate 2 is also set to a plane 231, and the sealant 4 is filled between the second glass plate 2 and the first glass plate 1, wherein the sealant 4 is butyl rubber, and the molecular particles of the butyl rubber are relatively large. In this way, during the high-temperature lamination and extrusion process, the sealant 4 is melted into liquid by the high temperature, so that the sealant 4 can be bonded to the surfaces of the second glass plate 2 and the first glass plate 1, and the bonding is tight, reducing the generation of tiny gaps, thereby improving the bonding reliability and stability of the sealant 4 and the second glass plate 2 and the first glass plate 1, which is beneficial to improving the water-blocking effect of the sealant 4 on the photovoltaic module 100.

[0061] The surface of the second glass plate 2 in the inner installation space 22 is set as a patterned surface 221, so that the surface in the inner installation space 22 has a certain degree of roughness. The adhesive film 32 on the lower side of the battery cell 31 is located on the surface of the second glass plate 2. In this way, during the high-temperature lamination and extrusion process, the adhesive film 32 is melted into liquid by the high temperature, and the molecular particles of the adhesive film 32 are small, and the adhesive film 32 can flow into the gap of the patterned surface 221 of the second glass plate 2, so that the adhesive film 32 and the surface of the second glass plate 2 are well bonded and connected, and there is no gap at the bonding point, which can improve the bonding reliability and stability of the adhesive film 32 and the second glass plate 2, and then the bonding tightness of the battery cell 31 and the second glass plate 2 and the first glass plate 1 can be improved through the adhesive film 32.

[0062] Therefore, when the surfaces of the second glass plate 2 in the inner installation space 22 and the outer installation space 23 are both set as the patterned surface 221, the molten butyl rubber cannot flow into the gap of the patterned surface 221, resulting in a gap in the connection between the butyl rubber and the second glass plate 2, which will affect the sealing between the butyl rubber and the second glass plate 2. In this embodiment, by setting the surface of the outer installation space 23 to the plane 231, the contact between the butyl rubber and the surface of the second glass plate 2 can be effectively improved, the connection reliability is high, the phenomenon of glue penetration caused by tiny gaps can be reduced, and the sealing between the butyl rubber and the second glass plate 2 can be effectively improved. The inner installation space 22 is still set as the pattern surface 221. The fluidity of the adhesive film 32 is good. The pattern surface 221 can form a certain resistance to the flow of the adhesive film 32, which can reduce its flow speed to both sides. The molecular particles of the adhesive film 32 are small and can penetrate into the pattern gaps without affecting the adhesion of the adhesive film 32. The adhesive film 32 has poor adhesion to the glass, resulting in high cost and poor processability. The pattern surface 221 is set to contact with the adhesive film 32, which can increase the contact area between the adhesive film 32 and the surface of the second glass plate 2, and can effectively improve the adhesion tightness between the adhesive film 32 and the second glass plate 2. Its setting is reasonable and the connection is reliable.

[0063] In some embodiments, the distance between the annular partition 21 and the edge of the first glass plate 1 or the edge of the second glass plate 2 is D1, and satisfies: 9 mm ≤ D1 ≤ 11 mm.

[0064] Specifically, the extension direction of the annular partition 21 is perpendicular to the plane 231 where the first glass plate 1 or the second glass plate 2 is located, that is, the distance between the annular partition 21 and the edge of the first glass plate 1 is the same as the distance between the annular partition 21 and the edge of the second glass plate 2. Then, when the annular partition 21 is arranged on the first glass plate 1, the distance between the annular partition 21 and the edge of the first glass plate 1 can be set to D1, and when the annular partition 21 is arranged on the second glass plate 2, the distance between the annular partition 21 and the edge of the second glass plate 2 can be set to D1, and D1 can be taken as: 9mm, 9.5mm, 10.0mm, 10.5mm, 11.0mm. By setting the above multiple values, the distance between the edge of the first glass plate 1 or the second glass plate 2 and the annular partition 21 can meet the design requirements, so that the width for accommodating the sealant 4 is appropriate and the filling amount of the sealant 4 is met. The sufficient filling amount can achieve effective water blocking of the sealant 4, and setting the above distance range can improve the bonding strength of the sealant 4.

[0065] Among them, the distance between the edge of the first glass plate 1 or the second glass plate 2 and the annular partition 21 can also be set to 8mm, 7.5mm, 7mm, etc., which can also meet the filling amount of the sealant 4. However, the distance between the edge of the first glass plate 1 or the second glass plate 2 and the annular partition 21 cannot be set to less than 7mm. If it is too small, the filling amount of the sealant 4 will be reduced, affecting the bonding strength of the sealant 4 between the first glass plate 1 and the second glass plate 2, and reducing the water blocking effect, thereby affecting the reliability and service life of the photovoltaic module 100. In addition, the distance between the edge of the first glass plate 1 or the second glass plate 2 and the annular partition 21 cannot be set too large. Although it can meet the filling amount of the sealant 4, it will make the sealant 4 have good adhesion and water blocking properties, but it will cause excessive waste of sealant 4 and increase the setting cost. It may also reduce the internal installation space 22 of the battery structure 3, combined with unreasonable settings, thereby affecting the installation of the battery structure 3.

[0066] In some embodiments, the width of the annular partition 21 is a, and satisfies: 0.25 mm≤a≤0.35 mm.

[0067] Specifically, Figure 2As shown, the width of the annular partition 21 is the size of the annular partition 21 in the outer installation space 23 and the inner installation space 22. The width a of the annular partition 21 can be 0.25 mm, 0.28 mm, 0.30 mm, 0.32 mm, 0.35 mm, etc. By setting the above multiple values, the width size of the annular partition 21 can be more appropriate, and a certain structural strength can be guaranteed. The kinetic energy formed by the flow of the sealant 4 and the film 32 can be resisted to achieve effective separation of the sealant 4 and the film 32, and the sealant 4 in the external space can be prevented from flowing to the internal space, and the film 32 in the internal space can be prevented from flowing to the external space, and the glue penetration phenomenon during the high-temperature lamination process can be avoided.

[0068] Among them, the width of the annular partition 21 cannot be set too small. If it is too small, the strength of the annular partition 21 will be reduced, and it cannot effectively separate the sealant 4 and the film 32 during the high-temperature lamination process. The width of the annular partition 21 cannot be set too large. Although it can meet the strength of the annular partition 21 and play a separation role, it will occupy the size of the outer installation space 23 and the inner installation space 22, thereby making the size of the outer installation space 23 and the inner installation space 22 smaller, which cannot meet the installation requirements and performance requirements of the sealant 4 or the battery structure 3.

[0069] In some other embodiments, the height of the annular partition 21 is b, and satisfies: 0.5 mm≤b≤0.9 mm.

[0070] Specifically, Figure 2 As shown, the height of the annular partition 21 is the dimension of the annular partition 21 between the first glass plate 1 and the second glass plate 2. The height b of the annular partition 21 can be: 0.50mm, 0.55mm, 0.60mm, 0.65mm, 0.70mm, 0.75mm, 0.80mm, 0.85mm, 0.90mm, etc. By setting the above multiple values, the height dimension of the annular partition 21 can be more appropriate, and the inner installation space 22 and the outer installation space 23 can be separated by the annular partition 21.

[0071] The height dimension of the annular partition 21 is related to the thickness of the battery cell 31 and the adhesive film 32. The thickness of the adhesive film 32 can be specifically determined according to the gram weight of the adhesive film 32 per square meter. The thickness of different adhesive films 32 is different. This will result in the thickness of the battery cell 31 and the sum of the thickness of the adhesive films 32 on both sides of the battery cell 31 being different. The height of the annular partition 21 satisfies the above-mentioned range, which can ensure the bonding reliability of the adhesive film 32 with the battery cell 31, the first glass plate 1 and the second glass plate 2 during the high-temperature lamination process. In addition, the annular partition 21 can effectively separate the adhesive film 32 from the sealant 4, reduce the risk of glue penetration, and thus improve the reliability of the photovoltaic module 100.

[0072] When the annular partition 21 is provided as a partition convex ring in the form of a step, the height of each step can be the same, so that the structural strength of each step is uniform and reliable, and unnecessary damage during transportation can be avoided.

[0073] Among them, the thickness of the adhesive film 32 cannot be set too small. A too thin adhesive film 32 may not be able to fully fill the gap between the battery cell 31 and the first glass plate 1 and the second glass plate 2 during the lamination process, which may easily lead to debonding. Debonding will reduce the packaging quality of the photovoltaic module 100, and further affect its long-term stability and durability.

[0074] In addition, the height of the annular partition 21 cannot be set too small. If it is too small, there will be a large gap between the annular partition 21 and the first glass plate 1, which may cause the sealant 4 and the adhesive film 32 to penetrate each other. The height of the annular partition 21 cannot be set too large. If it is too large, it will exceed the distance between the first glass plate 1 and the second glass plate 2. Although it will effectively isolate the sealant 4 and the adhesive film 32, it will make the adhesion between the adhesive film 32 or the sealant 4 and the first glass plate 1 and the second glass plate 2 poor, thereby reducing the overall connection reliability and sealing of the photovoltaic module 100.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0076] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, characterized in that: include: a first glass plate and a second glass plate, wherein the first glass plate is located above the second glass plate; A battery structure and a sealant, wherein the battery structure and the sealant are both installed between the first glass plate and the second glass plate, and the sealant is distributed around the battery structure, wherein the battery structure includes a battery cell and a glue film located on both sides of the battery cell; Wherein, an annular partition is provided between the first glass plate and the second glass plate, and the annular partition is located between the sealant and the battery structure and separates the sealant from the battery structure.

2. The photovoltaic module according to claim 1, characterized in that: The annular partition is configured as a partition protrusion ring protruding from a surface of the second glass plate toward the first glass plate.

3. The photovoltaic module according to claim 2, characterized in that: A height of the annular partition protruding from the surface of the second glass plate is less than or equal to a distance between the first glass plate and the second glass plate.

4. The photovoltaic module according to claim 2, characterized in that: The height of the annular partition protruding from the surface of the second glass plate is greater than the sum of the thickness of the battery cell and the thickness of one of the adhesive films.

5. The photovoltaic module according to claim 1, characterized in that: The annular partition is configured as a partition convex ring that protrudes from the surface of the first glass plate toward the second glass plate, and the partition convex ring extends to the surface of the second glass plate.

6. The photovoltaic module according to claim 5, characterized in that: The second glass plate is formed with an inserting groove open toward the first glass plate, and the separating protruding ring is inserted into the inserting groove toward the second glass plate.

7. The photovoltaic module according to any one of claims 1 to 6, characterized in that: The annular partition divides the space between the first glass plate and the second glass plate into an inner installation space and an outer installation space, the battery structure is located in the inner installation space, and the sealant is located in the outer installation space.

8. The photovoltaic module according to claim 7, characterized in that: The surface of the second glass plate facing the outer installation space is configured as a flat surface, and the surface of the second glass plate facing the inner installation space is configured as a patterned surface.

9. The photovoltaic module according to any one of claims 1 to 6, characterized in that: The distance between the annular partition and the edge of the first glass plate or the edge of the second glass plate is D1, and satisfies: 9 mm ≤ D1 ≤ 11 mm.

10. The photovoltaic module according to any one of claims 1 to 6, characterized in that: The width of the annular partition is a, and satisfies: 0.25 mm ≤ a ≤ 0.35 mm; And / or, the height of the annular partition is b, and satisfies: 0.5 mm ≤ b ≤ 0.9 mm.

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