Photovoltaic module

Abstract

The utility model relates to the technical field of photovoltaic product packaging, and discloses a photovoltaic module, which comprises a main body, a packaging front plate, a first adhesive film layer, a battery piece layer, a second adhesive film layer and a packaging rear plate, at least two bus bars are arranged on the side end surface of the battery piece layer along the thickness direction, and the bus bars are electrically connected with the battery piece layer; and the shielding piece is arranged at the intersection of the at least two bus bars and is suitable for shielding the outgoing line hole at the intersection. According to the utility model, the shielding member is arranged at the junction of the bus bars to shield the lead-out wire hole, so that the problems that the filling and sealing effects at the wire hole are poor, bubbles and gaps are easy to appear and the sealing performance is influenced after the bus bar lead-out wire passes through glass and a packaging material during packaging are effectively solved; and the quality risks of potential safety hazards and the like caused by incomplete sealing due to further sealing of the wiring part after packaging in the prior art are avoided, and an additional sealing process is not needed.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic product packaging technology, specifically to a photovoltaic module. Background Technology

[0002] Solar energy, as a mainstream clean energy source, has been widely used in various fields. The utilization of solar energy is mainly achieved through photovoltaic cells, also known as solar photovoltaic cells, which can directly convert sunlight into electrical energy.

[0003] Photovoltaic modules mainly consist of a glass front panel, busbar leads, solar panels, and a back panel, assembled through a lamination process. During lamination, the encapsulation material bonds and seals the back glass to both sides of the solar panel, reducing contact between the solar panel and air and moisture, thus protecting it. However, during encapsulation, the busbar leads need to pass through the holes left after passing through the glass and encapsulation material. Poor sealing at these points can easily lead to air bubbles and gaps, affecting the module's airtightness. In existing technologies, some companies further seal the connection points after encapsulation. This not only introduces new quality risks, such as incomplete sealing causing safety hazards, but also reduces production efficiency, extends delivery cycles, and increases production costs, hindering business development. Utility Model Content

[0004] In view of this, the present invention provides a photovoltaic module to solve the problem of poor sealing effect of busbar holes during encapsulation in the prior art.

[0005] This utility model provides a photovoltaic module, comprising:

[0006] The main body includes a front encapsulation plate, a first adhesive film layer, a battery cell layer, a second adhesive film layer, and a rear encapsulation plate stacked sequentially. The battery cell layer has at least two busbars on its side end face along the thickness direction, and the busbars are electrically connected to the battery cell layer.

[0007] A shielding element is disposed at the junction of at least two of the busbars and is adapted to shield the lead-out holes at the junction.

[0008] Optionally, the shielding member includes a covering portion and a fixing portion, wherein the covering portion and the fixing portion are spaced apart to form a snap-fit ​​position, the snap-fit ​​position being adapted to snap onto the bent portion of the busbar.

[0009] Optionally, the cover is disposed on the same side as the power generation surface of the battery cell layer and covers the intersection of the busbars.

[0010] Optionally, the junction of the busbars is located at the middle of the side end face of the battery cell layer along the thickness direction.

[0011] Optionally, there are two fixing parts, which are disposed on both sides of the covering part.

[0012] Optionally, one side of the snap-fit ​​position is open, and the opposite side is closed.

[0013] Optionally, the two ends of the shielding member are provided with an adhesive film layer.

[0014] Optionally, the shielding element is a polymer material shielding element.

[0015] Optionally, the side end face of the main body is provided with a frame.

[0016] Beneficial effects

[0017] The photovoltaic module provided by this utility model includes a main body, comprising a front encapsulation plate, a first encapsulating film layer, a cell layer, a second encapsulating film layer, and a rear encapsulation plate stacked sequentially. At least two busbars are provided on the side face of the cell layer along its thickness direction, and the busbars are electrically connected to the cell layer. A shielding member is disposed at the intersection of at least two of the busbars, suitable for shielding the lead-out holes at the intersection. By setting the shielding member at the intersection of the busbars to shield the lead-out holes, the problem of poor sealing effect, air bubbles, and gaps affecting the sealing performance at the lead-out holes after the busbar lead-out wires pass through the glass and encapsulation material during encapsulation is effectively solved. This avoids the quality risks such as incomplete sealing and safety hazards caused by further sealing at the connection points after encapsulation in the prior art. No additional sealing process is required, which can improve production efficiency, shorten delivery cycle, reduce production process complexity and cost, ensure the sealing performance and safety of the photovoltaic module, and benefit the production and development of enterprises. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a front view of a photovoltaic module according to an embodiment of the present utility model;

[0020] Figure 2 This is a side sectional view of a photovoltaic module according to an embodiment of the present utility model;

[0021] Figure 3 This is a front view of the shielding component according to an embodiment of the present utility model;

[0022] Figure 4 This is an assembly diagram of the shielding component and the busbar according to an embodiment of the present utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Main body; 11. Front encapsulation panel; 12. First encapsulating film layer; 13. Battery cell layer; 14. Second encapsulating film layer; 15. Rear encapsulation panel; 16. Busbar;

[0025] 2. Covering part; 21. Covering part; 22. Fixing part. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0028] According to an embodiment of the present invention, in one aspect, a photovoltaic module is provided, comprising:

[0029] The main body 1 includes a front encapsulation plate 11, a first adhesive film layer 12, a battery cell layer 13, a second adhesive film layer 14, and a rear encapsulation plate 15 arranged in sequence. At least two busbars 16 are provided on the side end face of the battery cell layer 13 along the thickness direction, and the busbars 16 are electrically connected to the battery cell layer 13.

[0030] The shielding element 2 is disposed at the intersection of at least two busbars 16 and is adapted to shield the lead-out holes at the intersection.

[0031] Specifically, the front panel 11 can be made of tempered glass or a high-molecular light-transmitting material, as long as sunlight can fully irradiate the battery cell layer 13 to achieve efficient conversion of light energy into electrical energy. No restrictions are placed on the material of the front panel 11.

[0032] Specifically, the first adhesive layer 12 and the second adhesive layer 14 can be made of common materials such as EVA, POE, EPE, and PVB. No restrictions are placed on the materials used for the first adhesive layer 12 and the second adhesive layer 14.

[0033] It is easy to understand that the first adhesive layer 12 and the second adhesive layer 14 are only different in installation position. They are both adhesive layers. The first adhesive layer 12 and the second adhesive layer 14 can be made of the same material or different materials.

[0034] It is easy to understand that the encapsulation back plate 15 can be made of polymer materials such as, but not limited to, a multilayer composite structure of fluorine film and polyester, or a glass fiber reinforced structure, and its color can be black or white, etc. There are no restrictions on the material and color of the encapsulation back plate 15.

[0035] It should be noted that the busbar 16 is used to collect and aggregate the dispersed current generated by the numerous solar cells in the cell layer 13, much like converging trickles into a river, enabling the photovoltaic module to output a sufficiently strong current to meet application requirements and effectively power external circuits. Ensuring a stable and reliable electrical connection between the solar cells and maintaining the integrity of the internal circuitry of the module is crucial for guaranteeing the stability and continuity of the photovoltaic module's output power. If the connection is poor, the module's power generation efficiency will be significantly reduced.

[0036] It should be noted that the shielding component 2 is laminated integrally with the main body 1. During the lamination process, the shielding component 2 can be tightly fitted to the intersection of the busbars 16, forming an integral structure with the front encapsulation panel 11, the first encapsulating film layer 12, the cell layer 13, the second encapsulating film layer 14, and the rear encapsulation panel 15. This enhances the structural stability of the photovoltaic module, effectively preventing displacement or separation between layers. Moreover, since the shielding component 2 is fixed at the lead hole during lamination, the sealing reliability at the lead hole is improved, eliminating the possibility of air and moisture entering the module through the lead hole, thereby extending the service life of the photovoltaic module.

[0037] The photovoltaic module provided in this embodiment effectively solves the problem of poor sealing effect and easy formation of air bubbles and gaps at the wire hole after the busbar 16 wire passes through the glass and encapsulation material during the encapsulation process. It avoids the quality risks such as incomplete sealing and safety hazards caused by the additional sealing at the connection point after encapsulation in the prior art. It eliminates the need for additional sealing processes, improves production efficiency, shortens delivery cycle, reduces production process complexity and cost, ensures the sealing and safety of photovoltaic modules, and benefits the production and development of enterprises.

[0038] Furthermore, the shielding member 2 includes a covering part 21 and a fixing part 22, with the covering part 21 and the fixing part 22 spaced apart to form a snap-fit ​​position, which is adapted to snap the bent part of the busbar 16.

[0039] It is easy to understand that the snap-fit ​​connector, which engages with the bent portion of the busbar 16, enables positioning and secure connection. The dimensions of the snap-fit ​​connector are adapted to the dimensions of the bent portion of the busbar 16. During the assembly of the photovoltaic module, this effectively constrains the position of the busbar 16, preventing it from shifting or wobbling due to external forces or internal stress. This ensures the stability and reliability of the current transmission path, reduces problems such as poor contact and increased resistance caused by loose busbar 16, thereby improving the power generation efficiency and power quality of the photovoltaic module and ensuring its long-term stable operation. The shielding component 2 can be circular, square, rectangular, triangular, or other irregular shapes, etc., without specific limitations. It is preferably circular, and its diameter is greater than the width of the busbar 16.

[0040] Furthermore, the cover 21 is disposed on the same side as the power generation surface of the battery cell layer 13, and is disposed at the intersection of the busbar 16.

[0041] Intuitively, the cover 21 is on the same side as the power generation surface of the cell layer 13 and covers the intersection of the busbars 16, providing effective protection for the lead-out holes and the surrounding connection area of ​​the busbars 16. This prevents dust, moisture, and other impurities from adhering to and intruding into this critical area, reducing the risk of short circuits or corrosion caused by environmental factors, ensuring the stability and durability of the electrical connection between the busbars 16 and the cells, and extending the lifespan of the photovoltaic module.

[0042] Furthermore, the junction of the busbars 16 is located at the middle of the side end face of the battery cell layer 13 along the thickness direction.

[0043] As is easily understood, the busbars 16 converge at the center of the side end face of the cell layer 13, which facilitates uniform current convergence, reduces local overheating and power loss caused by uneven distribution, and improves power conversion efficiency and stability. At the same time, it ensures uniform stress on the lead holes, reduces the risk of sealing failure or structural damage caused by external forces and stress, enhances the reliability and durability of the module, and ensures long-term stable power generation performance.

[0044] In an alternative embodiment, the junction of the busbars 16 can be located near the edge of the side face of the cell layer 13. When the lead wires of the busbars 16 are connected to external circuits, the line length can be shortened, reducing line resistance loss.

[0045] Furthermore, there are two fixing parts 22, which are provided on both sides of the covering part 21.

[0046] It is easy to understand that the number of fixing parts 22 is related to the intersection of the busbars 16. If the intersection of the busbars 16 is set on one side of the photovoltaic panel, the fixing parts 22 can be adjusted to a single-sided layout accordingly.

[0047] Furthermore, one side of the snap-fit ​​position is open, while the opposite side is closed.

[0048] Intuitively, the opening on one side of the snap-fit ​​position facilitates the smooth insertion of the bent portion of the busbar 16, effectively reducing operational difficulty and improving assembly efficiency during photovoltaic module assembly. Conversely, the sealing on the other side precisely limits the bent portion of the inserted busbar 16, preventing it from dislodging during lamination due to vibration, thermal expansion and contraction, etc. This ensures the stability and reliability of the connection between the busbar 16 and the shielding component 2, maintains a stable current transmission path, guarantees the continuous and efficient operation of the photovoltaic module, and reduces the risk of electrical performance degradation or malfunctions caused by loose connections.

[0049] Furthermore, the two ends of the shielding member 2 are provided with adhesive film layers.

[0050] Intuitively, the adhesive film layers on both ends of the shielding member 2 allow the shielding member 2 to better integrate with the main body 1 structure during the lamination process. The adhesive film layers can fill any tiny gaps that may exist between the shielding member 2 and the adjacent module layers, significantly enhancing the sealing effect and effectively preventing air, moisture, and other impurities from intruding from the edges of the shielding member 2. This maximizes the protection of the busbar 16 and the lead hole area from environmental corrosion, thereby ensuring the stability and safety of the internal electrical connections of the photovoltaic module.

[0051] In an optional embodiment, a sealant can be pre-applied to the mounting position of the shielding member 2 on the main body 1 structure instead of a film layer. This sealant needs to have good adhesion and filling properties, so that it can fit tightly against the end face of the shielding member 2 during installation, forming a reliable sealing protection.

[0052] Furthermore, the shielding component 2 is a shielding component made of polymer material.

[0053] Furthermore, a border is provided on the side end face of the main body 1.

[0054] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A photovoltaic module, characterized by, The utility model relates to a kind of solar module and its manufacturing method, including: Main body (1), including encapsulation front plate (11), first adhesive film layer (12), battery piece layer (13), second adhesive film layer (14) and encapsulation back plate (15) are sequentially arranged in order, at least two busbars (16) are provided in the side end surface of the battery piece layer (13) along the thickness direction, and the busbar (16) is electrically connected with the battery piece layer (13); Shielding piece (2) is arranged at the intersection of at least two busbars (16), and is suitable for shielding the lead-out hole at the intersection;The covering part (21) and the fixed part (22) are arranged with a gap between the covering part (21) and the fixed part (22) to form a clamping position, and the clamping position is suitable for clamping the bending part of the busbar (16), one side of the clamping position is provided with an opening, and the opposite side is provided with a seal.

2. The photovoltaic module of claim 1, wherein, The covering part (21) is arranged on the same side of the power generation surface of the battery piece layer (13), and covers the intersection of the busbar (16).

3. The photovoltaic module of claim 2, wherein, The intersection of the busbar (16) is arranged at the middle of the side end surface of the battery piece layer (13) along the thickness direction.

4. The photovoltaic module of claim 3, wherein, The fixed part (22) is two, and is arranged on both sides of the covering part (21).

5. The photovoltaic module according to any of claims 1 to 4, characterized in that The two end surfaces of the shielding piece (2) are provided with adhesive film layers.

6. The photovoltaic module according to any of claims 1-4, characterized in that, The shielding piece (2) is a high polymer material shielding piece.

7. The photovoltaic module according to any of claims 1-4, wherein, The side end surface of the main body (1) is provided with a frame.

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