Photovoltaic laminate and photovoltaic module

Abstract

The utility model discloses a photovoltaic laminated member and a photovoltaic assembly, the photovoltaic laminated member comprises at least one battery string layer, a plurality of bus bars and an insulating layer, the battery string layer comprises a plurality of battery strings, the plurality of bus bars are arranged on the back surface of the battery string layer, and the plurality of bus bars are arranged at the two ends of the battery strings; the insulating layer comprises a plurality of insulating structural members, the plurality of insulating structural members are respectively arranged at two ends of the battery string, a plurality of through holes are respectively formed in the plurality of insulating structural members, the plurality of through holes are arranged at intervals, and the battery string is electrically connected with the bus bar at the through holes. Therefore, the layout of the battery string layer is optimized, the arrangement of the battery string layer in the photovoltaic laminated piece is facilitated, the process is simplified, meanwhile, the arrangement of the through holes provides a direct contact path for the bus bar and the welding strip, good electrical connection is ensured, the insulation structural piece is kept complete in the area between the adjacent universal holes, and the reliability of the photovoltaic laminated piece is improved. The effect of isolating the bus bar from the welding strips with different polarities is achieved, and the electric connection efficiency and safety of the photovoltaic laminated piece are improved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module technology, and in particular to a photovoltaic laminate and a photovoltaic module. Background Technology

[0002] In the prior art, the back contact battery module is composed of several battery cells connected in series. When the battery cells are connected in series to form a battery string and arranged in the back contact battery module, the layout is not optimized, which affects the area ratio of the battery cells, and the structure is relatively complex in the process of connecting the battery strings. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the first objective of the present invention is to provide a photovoltaic laminate with optimized layout structure and improved efficiency.

[0004] The second objective of this invention is to provide a photovoltaic module, including the photovoltaic laminate described in the above embodiments.

[0005] A photovoltaic laminate according to a first aspect of the present invention includes: at least one battery string layer, multiple busbars, and an insulating layer. The battery string layer includes multiple battery strings arranged sequentially along a first direction and extending along a second direction, wherein the first direction and the second direction are different. Multiple busbars are disposed on the back side of the battery string layer and at both ends of the battery strings along the second direction. The insulating layer is disposed between the battery string layer and the busbars. The insulating layer includes multiple insulating structural members, each disposed at one end of a corresponding battery string along the second direction. The insulating structural members extend along the first direction and are spaced apart along the first direction. Multiple through holes are formed on each of the multiple insulating structural members, spaced apart. The battery strings and the busbars are electrically connected at the through holes.

[0006] According to the photovoltaic laminate in this embodiment, by sequentially connecting multiple battery strings in the battery string layer, with the multiple battery strings extending and arranged in the same direction, the layout of the battery string layer is optimized. This facilitates the installation of the battery string layer within the photovoltaic laminate, simplifies the process, improves the installation efficiency of the battery string layer, reduces the area occupied by the busbar on the photovoltaic laminate, and increases the output power of the photovoltaic laminate. Simultaneously, the through-hole configuration provides a direct contact path between the busbar and the solder strip, ensuring a good electrical connection. In the area between adjacent general-purpose holes, the insulating structure remains intact, isolating the busbar from the solder strip of different polarities, thus improving the electrical connection efficiency and safety of the photovoltaic laminate.

[0007] In some embodiments, a plurality of battery strings are connected in series along the first direction.

[0008] In some embodiments, the polarities of two adjacent battery strings at the same end along the second direction are opposite.

[0009] In some embodiments, the distance between the through hole adjacent to the edge of the insulating structure along the first direction and the corresponding edge of the insulating structure is L1, wherein L1 satisfies: 3mm≤L1≤12mm.

[0010] In some embodiments, the insulating structure includes: a first adhesive layer and a second adhesive layer, wherein the first adhesive layer includes an EVA layer, a POE layer or a PVB layer; the second adhesive layer includes a PET layer, an FPF layer or a PVC layer, and the second adhesive layer is disposed on the side of the first adhesive layer away from the battery string layer.

[0011] In some embodiments, at least one edge of the busbar along the second direction is spaced apart from the corresponding edge of the through hole adjacent to the at least one edge.

[0012] In some embodiments, the distance between at least one edge of the busbar along the second direction and the distance between the through hole and the at least one edge of the through hole is L2, wherein L2 satisfies: 2mm≤L2≤10mm.

[0013] In some embodiments, the distance between the busbars along the second direction is L3, and the distance between the insulating structural members along the second direction is L4, wherein L3 and L4 satisfy: 10mm≤L4-L3≤20mm.

[0014] In some embodiments, the battery string includes a first battery cell and a second battery cell, the first battery cell and the second battery cell being disposed at both ends of the battery string along the second direction, the busbar and the insulating structure being disposed on the back of the first battery cell and the second battery cell respectively, the back of the first battery cell and the second battery cell being provided with a first solder strip and a second solder strip, the first solder strip and the second solder strip collecting currents of different polarities, the insulating structure including a first insulating member disposed on the back of the first battery cell and a second insulating member disposed on the back of the second battery cell, the first insulating member being spaced apart from one of the first solder strip and the second solder strip adjacent to the edge of the first battery cell along the first direction, and the second insulating member being spaced apart from the other of the first solder strip and the second solder strip adjacent to the edge of the second battery cell along the first direction.

[0015] A photovoltaic module according to a second aspect of the present invention includes the photovoltaic laminate described in the above embodiments.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of a photovoltaic laminate according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of a battery cell according to an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of a battery string according to an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of an insulating structure according to an embodiment of the present utility model;

[0022] Figure 5 This is a cross-sectional schematic diagram of an insulating structure according to an embodiment of the present utility model;

[0023] Figure 6 This is a schematic diagram of the sub-insulator and busbar according to an embodiment of the present utility model.

[0024] Figure label:

[0025] 100. Battery string; 101. First battery string; 102. Second battery string; 103. Third battery string;

[0026] 10. Solar cell; 11. Welding ribbon; 12. First welding ribbon; 13. Second welding ribbon; 14. Busbar; 151. First solar cell; 152. Second solar cell;

[0027] 20. Insulating structural component; 211. First insulating component; 212. Second insulating component; 22. Cutting mark; 23. Through hole; 24. First adhesive film layer; 25. Second adhesive film layer;

[0028] 200. Photovoltaic laminates;

[0029] A. Length direction; B. Width direction; C. Thickness direction; D. First direction; E. Second direction. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-6A photovoltaic laminate 200 according to an embodiment of the present utility model is described.

[0031] like Figures 1-4 As shown, the photovoltaic laminate 200 includes at least one battery string 100 layer, multiple busbars 14, and an insulating layer. The battery string 100 layer includes multiple battery strings 100 arranged sequentially along a first direction D and extending along a second direction F. The first direction D and the second direction F are different. The multiple busbars 14 are disposed on the back side of the battery string 100 layer and at both ends of the battery strings 100 along the second direction F.

[0032] In this application, the photovoltaic laminate 200 includes a battery string layer 100, which comprises multiple battery strings 100 spaced apart and arranged in parallel along a first direction D. Each battery string 100 extends along a second direction F, and one end of two adjacent battery strings 100 is connected to each other, so that the multiple battery strings 100 are connected in series to form the battery string layer 100. The insulating structure 20 is disposed on the back side of the solar cell 10, which can reduce the shading of the front light-receiving area of ​​the solar cell 10 by the insulating structure 20 and improve the light energy absorption efficiency of the photovoltaic laminate 200.

[0033] An insulating layer is disposed between the battery string 100 layers and the busbar 14 to prevent the busbar 14 from simultaneously collecting currents of different polarities from the battery string 100 layers. The insulating layer includes multiple insulating structural members 20, which are respectively disposed at both ends of the corresponding battery string 100 along a second direction F. The insulating structural members 20 extend along a first direction D, and are spaced apart along the first direction D. That is, the multiple insulating structural members 20 are respectively disposed on the back side of each battery string 100, located at both ends of the battery string 100 along the second direction F, and the insulating structural members 20 disposed on adjacent battery strings 100 are spaced apart along the first direction D. To facilitate electrical connection between the insulating structural members and the corresponding battery strings 100, multiple through holes 23 are formed on the multiple insulating structural members 20, which are spaced apart along the first direction D. The battery string 100 and the busbar 14 are electrically connected at the through holes 23. The insulating structural member 20 has a length direction A, a width direction B, and a thickness direction C.

[0034] For example, the battery string 100 includes multiple battery cells 10 arranged sequentially along the second direction F. Adjacent battery cells 10 are at least partially stacked. Each battery cell 10 includes multiple positive grid lines and multiple negative grid lines. Simultaneously, multiple first solder strips 12 and multiple second solder strips 13 are provided on the back side of the battery cell 10. The first solder strips 12 are electrically connected to the positive grid lines, and the second solder strips 13 are electrically connected to the negative grid lines. For the same battery cell 10, when the busbar 14 is electrically connected to the first solder strip 12, the insulating structure 20 is used to prevent the busbar 14 and the second solder strip 13 from contacting each other, thus preventing a short circuit in the photovoltaic laminate 200. Similarly, when the busbar 14 is electrically connected to the second solder strip 13, the insulating structure 20 is used to prevent the busbar 14 and the first solder strip 12 from contacting each other.

[0035] Optionally, in this application, in conjunction with Figures 2-4 By opening through holes 23 on the insulating structure 20, when the insulating structure 20 is located between the busbar 14 and the battery cell 10 of the battery string 100, the battery cell 10 is electrically connected to the busbar 14 at the through holes 23. The through holes 23 on the insulating structure 20 provided on the same battery cell 10 are opposite to the grid lines of the same polarity, such that the through holes 23 on the same insulating structure 20 are opposite to the positive grid line or the negative grid line respectively.

[0036] Through-holes 23 penetrate the insulating structure 20 along its thickness direction. Multiple through-holes 23 are evenly spaced along the length of the insulating structure 20. In the photovoltaic laminate 200, the through-holes 23 serve as a physical channel to facilitate direct contact between the busbar 14 and the solder strip 11 to form an electrical connection. The area between the multiple through-holes 23 in the insulating structure 20 serves to isolate the busbar 14 from the solder strip 11, which collects current with different polarities, thus providing insulation. The shapes of the through-holes 23 include, but are not limited to, circles, rectangles, and ellipses.

[0037] According to the photovoltaic laminate 200 in this embodiment, by sequentially connecting multiple battery strings 100, which are included in the battery string 100 layer, and arranging them in the same direction, the layout of the battery string 100 layer is optimized. This facilitates the installation of the battery string 100 layer within the photovoltaic laminate 200, simplifies the process, improves the installation efficiency of the battery string 100 layer, reduces the area occupied by the busbar 14 in the photovoltaic laminate 200, and increases the output power of the photovoltaic laminate 200. Simultaneously, the through-hole 23 provides a direct contact path between the busbar 14 and the solder ribbon 11, ensuring a good electrical connection. In the area between adjacent general-purpose holes, the insulating structure 20 remains intact, isolating the busbar 14 from the solder ribbon 11 with different polarities, thus improving the electrical connection efficiency and safety of the photovoltaic laminate 200.

[0038] In some embodiments, such as Figure 1As shown, multiple battery strings 100 are connected in series along a first direction D. That is, for three adjacent battery strings 100, the three battery strings 100 are arranged along the first direction D and all extend along a second direction F. When the three battery strings 100 are connected in series, each of the three battery strings 100 includes a first end and a second end, where the first end and the second end represent the two ends of the battery string 100 along the second direction F. The first ends of the three battery strings 100 are located at the same end, and the second ends of the three battery strings 100 are located at the same end. The three battery strings 100 include a first battery string 101, a second battery string 102, and a third battery string 103. The second end of the first battery string 101 and the second end of the second battery string 102 are connected in series, and the first end of the second battery string 102 and the first end of the third battery string 103 are connected in series. The second battery string 102 is located between the first battery string 101 and the second battery string 103. Therefore, the battery string 100 layer includes multiple battery strings 100 connected in series, and the multiple battery strings 100 are connected in a serpentine manner, which simplifies the structure of the battery string 100 layer and facilitates the installation of the battery string 100 layer in the photovoltaic laminate 200.

[0039] Optionally, the polarities of the same end of two adjacent battery strings 100 along the second direction F are opposite. For example, the first end of the first battery string 101 and the first end of the second battery string 102 have opposite polarities, and the second end of the first battery string 101 and the second end of the second battery string 102 have opposite polarities. The busbar 14 is connected in series at the second end of the first battery string 101 and the second end of the second battery string 102. Thus, the polarities of the same end of adjacent battery strings 100 are opposite, which facilitates the series connection between battery strings 100.

[0040] In some embodiments, such as Figure 4 As shown, the distance between the through hole 23 adjacent to the edge of the insulating structure 20 along the first direction D and the corresponding edge of the insulating structure 20 is L1, and L1 satisfies: 3mm≤L1≤12mm.

[0041] Optionally, the through-hole 23 adjacent to the edge of the insulating structural member along the first direction D is designated as the first through-hole 23, and the distance between the first through-hole 23 and the adjacent edge is L1, which is limited to between 3 mm and 12 mm. For example, the distance between the two edges along the length direction A of the insulating structural member 20 and the first through-hole 23 adjacent to the edge is equal, either 5 mm or 3 mm. Alternatively, the distances between the two first through-holes 23 located at the edge along the length direction and the corresponding edge are unequal, being 5 mm and 3 mm respectively.

[0042] The two first through holes 23 are not equidistant from the adjacent edge because the side edge with the shorter distance has the same current polarity as the adjacent solder strip 11. In order to facilitate the reduction of some insulating structural component 20 material, the current polarity collected by the solder strip 11 adjacent to the edge of the battery cell 10 along the first direction D is the same as the current polarity collected by the busbar 14. The solder strip 11 and the corresponding busbar 14 can be directly electrically connected.

[0043] Therefore, by limiting the distance between the through hole 23 and the edge of the adjacent insulating structure 20, the insulating structure 20 is facilitated to be installed on the battery cell 10, thereby achieving insulation of the busbar 14 and the solder strip 11 with opposite polarities, while ensuring the electrical connection of the busbar 14 and the solder strip 11 with the same polarity.

[0044] Furthermore, such as Figure 3 As shown, the battery string 100 includes a first battery cell 151 and a second battery cell 152. The first battery cell 151 and the second battery cell 152 are respectively disposed at both ends of the battery string 100 along the second direction F. The bus bar 14 and the insulating structure 20 are respectively disposed on the back of the first battery cell 151 and the second battery cell 152. The back of the first battery cell 151 and the second battery cell 152 are each provided with a first solder strip 12 and a second solder strip 13. The first solder strip 12 and the second solder strip 13 are alternately arranged along the first direction D. The first solder strip 12 and the second solder strip 13 are electrically connected to the positive grid line and the negative grid line along the second direction F respectively to collect currents of different polarities.

[0045] The insulating structure 20 includes a first insulating member 211 disposed on the back side of the first battery cell 151 and a second insulating member 212 disposed on the back side of the second battery cell 152. The first insulating member 211 is spaced apart from one of the first solder strip 12 and the second solder strip 13 adjacent to the edge of the first battery cell 151 along the first direction D. The second insulating member 212 is spaced apart from the other of the first solder strip 12 and the second solder strip 13 adjacent to the edge of the second battery cell 152 along the first direction D.

[0046] In this embodiment, for two first battery cells 151 at the same end of two adjacent battery strings 100 along the second direction F, a first insulating member 211 is provided on the back of each of the two first battery cells 151. One end of the first insulating member 211 on the back of the first battery string 101 along the first direction D is spaced apart from one of the adjacent first solder strips 12 and second solder strips 13. Similarly, the first insulating member 211 on the back of the second battery string 102 along the first direction D is also spaced apart from one of the adjacent first solder strips 12 and second solder strips 13 at the same end as the first insulating member 211 on the back of the first battery string 101 along the first direction D. That is, the first insulating members 211 on the back of multiple battery strings 100 are arranged along the first direction D on the same side adjacent to the battery cell 10, and the second insulating members 212 on the back of multiple battery strings 100 are arranged along the first direction D on the other side adjacent to the battery cell 10. The first insulating members 211 and second insulating members 212 on the back of the same battery string 100 are at least partially offset along the second direction F.

[0047] Furthermore, in this application, the first insulating member 211 and the second insulating member 212 are respectively spaced apart from the two side edges of the solar cell 10 along the first direction D. This saves material on the insulating structure member 20 while avoiding the insulating structure member 20 being located in the gaps of the solar cell string 100, thus preventing it from affecting the aesthetics of the photovoltaic module. The first insulating member 211 is used to insulate the electrical connection between the second solder strip 13 and the solar cell 10, and the second insulating member 212 is used to insulate the electrical connection between the first solder strip 12 and the solar cell 10.

[0048] In some embodiments, such as Figure 5 As shown, the insulating structure 20 includes: a first adhesive layer 24 and a second adhesive layer 25. The first adhesive layer 24 includes an EVA layer, a POE layer or a PVB layer; the second adhesive layer 25 includes a PET layer, an FPF layer or a PVC layer, and the second adhesive layer 25 is disposed on the side of the first adhesive layer 24 away from the battery string 100 layers.

[0049] The first encapsulating layer 24 is composed of an EVA (ethylene-vinyl acetate copolymer) layer, a POE (polyolefin elastomer) layer, or a PVB (polyvinyl butyral) layer. These materials have good adhesion, transparency, and UV resistance, and are commonly used as encapsulation materials in photovoltaic modules. The second encapsulating layer 25 is composed of a PET (polyethylene terephthalate) layer, an FPF (flexible polymer film) layer, or a PVC (polyvinyl chloride) layer. These materials possess excellent mechanical strength, weather resistance, and electrical insulation properties, making them suitable for providing additional protection and support. The first encapsulating layer 24 of the insulating structure 20 is located on the side of the insulating structure 20 adjacent to the solar cell 10, and the second encapsulating layer 25 is located on the side of the insulating structure 20 away from the solar cell 10.

[0050] Thus, the first adhesive layer 24 provides excellent light transmittance and adhesion, while the second adhesive layer 25 enhances the overall mechanical strength and electrical insulation performance, thereby improving the overall performance of the insulating structural component 20.

[0051] In some embodiments, such as Figure 6 As shown, the manifold 14 is spaced apart from the corresponding edge of the through hole 23 adjacent to at least one side edge along the second direction F.

[0052] Furthermore, the distance between at least one edge of the manifold 14 along the second direction F and the adjacent at least one edge of the through hole 23 is L2, where L2 satisfies: 2mm≤L2≤10mm.

[0053] Along the width direction B of the insulating structure 20, the width of the busbar 14 is less than the width of the through hole 23. By limiting the length range of L2, it can be ensured that the portion of the busbar 14 opposite to the through hole 23 can be completely connected to the solder strip 11, ensuring the contact area between the busbar 14 and the solder strip 11, making the electrical connection between the busbar 14 and the solder strip 11 more reliable. If L2 is less than 2mm, the distance between the edge of the busbar 14 and the through hole 23 along the edge of the insulating structure 20 is too small, causing the edge of the busbar 14 to easily overlap with the edge of the through hole 23, increasing the difficulty of welding the busbar 14 to the solder strip 11, and resulting in lower welding reliability. If L2 is greater than 12mm, the distance between the edge of the busbar 14 and the through hole 23 along the edge of the insulating structure 20 is too large, resulting in an excessively large width of the through hole 23 in the width direction B. The contact area between the busbar 14 and the solder strip 11 through the through hole 23 cannot be guaranteed, the structural strength of the insulating structure 20 is low, and the material of the busbar 14 is wasted.

[0054] Therefore, by limiting the distance range between the edge of the busbar 14 and the through hole 23 along the edge of the insulating structure 20, a reliable electrical connection between the busbar 14 and the solder strip 11 can be ensured, the assembly precision of the busbar 14 can be reduced, and the overall structural stability and reliability of the photovoltaic laminate 200 can be enhanced.

[0055] In some alternative embodiments, combined with Figure 6 The distance between the busbar 14 and the second direction F is L3, and the distance between the insulating structural member 20 and the second direction F is L4. L3 and L4 satisfy: 10mm≤L4-L3≤20mm.

[0056] Along the width direction B of the insulating structure 20, the width of the busbar 14 is less than the width of the insulating structure 20. The difference between L3 and L4 satisfies 10mm≤L4-L3≤20mm, ensuring that the insulating structure 20 extends a certain distance beyond the busbar 14 in the width direction B, providing additional protection and support, and effectively preventing unnecessary electrical contact between the busbar 14 and the solder strip 11.

[0057] Therefore, by limiting the width difference range between the busbar 14 and the insulating structure 20 in the width direction B, the insulation effect between the busbar 14 and the solder strip 11 can be ensured while saving the amount of material used in the insulating structure 20, thereby reducing the production cost of the photovoltaic laminate 200 and ensuring the electrical connection reliability and safety of the photovoltaic laminate 200.

[0058] In this application, during the processing of the photovoltaic laminate 200, multiple insulating structural components 20 are connected to each other as a whole, requiring cutting to form individual insulating structural components 20.

[0059] Specifically, such as Figures 4-6 As shown, cutting marks 22 are formed between two adjacent insulating structural members 20. The cutting marks 22 indicate the cutting positions between adjacent insulating structural members 20. The cutting mechanism cuts the insulating structural members 20 along the cutting marks 22, allowing it to accurately cut the insulating structural members 20 into multiple independent insulating structural members 20. This avoids the problem of abnormal cutting accuracy of the insulating structural members 20 due to the accumulation of cutting errors with increasing cutting times. The multiple cutting marks 22 on the insulating structural members 20 provide clear cutting points, ensuring that each cutting is performed according to the preset position. This guarantees the cutting accuracy of the insulating structural members 20 and prevents the gradual accumulation of dimensional deviations due to multiple operations, ensuring the consistency of multiple insulating structural members 20. This is beneficial for ensuring the position of the insulating structural members 20 on the battery string 100 and improving the cutting rate of the insulating structural members 20.

[0060] According to some embodiments of this utility model, such as Figure 4 As shown, multiple break holes are provided at the cutting mark position 22, and the multiple break holes are spaced apart along the width direction B of the insulating structure 20.

[0061] Multiple interrupted holes penetrate the insulating structure 20 along its thickness direction C and are evenly spaced along its width direction B. This arrangement of interrupted holes provides a clear guide path for the cutting mechanism, ensuring the straightness and accuracy of the cutting line. The interrupted holes not only serve as visual reference points but also physically weaken the material, making it easier for the cutting mechanism to cut into the material and cut radially along the predetermined path, reducing the risk of deviation.

[0062] Therefore, the setting of the break hole helps to improve the cutting accuracy and ensure the dimensional consistency of each insulating structural component 20. Because the cutting is more precise, the waste generated by the cutting deviation can be reduced, the material cost can be reduced, and the setting of the break hole makes the cutting process simpler and more direct, reducing the need for complex calibration or adjustment, thereby simplifying the entire cutting process.

[0063] Alternatively, a marking line can be provided at the cutting mark position 22, and the color of the marking line is different from that of the insulating structural component 20. That is, a marking line is set on the insulating structural component 20, and cutting is performed after identifying the marking line, facilitating the identification of the marking line and precise cutting at the marked line position. The marking line setting process is simple and low-cost. By providing clear cutting guidance, it can speed up the cutting mechanism's cutting speed of the insulating structural component 20 and improve the overall efficiency of the cutting process.

[0064] In some alternative embodiments, such as Figure 4 As shown, a groove is provided at the cutting mark 22. The groove extends along the width direction B of the insulating structure 20 and penetrates at least one side surface of the insulating structure 20 along the width direction B. Alternatively, the groove is provided on one side surface of the two sides of the insulating structure 20 along the thickness direction C. The groove is formed by recessing into the side of the insulating structure 20 along the thickness direction C to avoid facing the other side surface of the insulating structure 20. The groove extends along the width direction B of the insulating structure 20. The groove provides a clear cutting path for the cutting mechanism and provides a physical guide for the cutting mechanism, so that the cutting process can start from one end of the groove, reducing the possibility of cutting deviation.

[0065] Therefore, the groove design helps improve cutting accuracy, ensuring that each cut is made in the preset position, reducing deviations, improving cutting precision, reducing waste caused by cutting deviations, and lowering material costs. The groove design also simplifies the cutting process, reducing the need for complex calibration or adjustment, thus simplifying the entire cutting process. By providing clear cutting guidance, the cutting speed of the cutting mechanism on the insulating structural component 20 can be accelerated, improving the overall efficiency of the cutting process.

[0066] According to some embodiments of this utility model, the insulating structural member 20 is a wound structure before cutting. The wound structure is provided with multiple cutting marks 22 to facilitate cutting into multiple insulating structural members 20. During the cutting process of the insulating structural member 20, the wound structure rotates and loosens to release a certain length to cut into a single insulating structural member 20. As the cutting process proceeds, the wound structure gradually loosens, causing errors in the released length. The setting of the cutting marks 22 ensures that the length of the cut insulating structural member 20 remains consistent.

[0067] The wound structure allows the insulating structural member 20 to provide a longer effective length within a limited space, making it particularly suitable for space-constrained applications and facilitating flexible installation of the insulating structural frame. Compared to planar structures, the wound structure is easier to package, transport, and store, reducing logistics costs.

[0068] The photovoltaic module according to the present invention includes a photovoltaic laminate 200 according to any one of the above embodiments.

[0069] According to the photovoltaic module of the present invention, by applying the photovoltaic laminate 200 in the above embodiment, the overall performance of the photovoltaic module and the yield of the product can be effectively improved, and the production cost of the photovoltaic module can be reduced.

[0070] In this application, a process equipment is also used in the photovoltaic module processing, including: a welding mechanism, a film-applying mechanism, and a cutting mechanism. The welding mechanism is used to weld the busbar 14 and the welding strip 11 of the photovoltaic laminate 200 at the through hole 23 of the photovoltaic laminate 200; the film-applying mechanism includes a winding structure and is used to place the insulating structural member 20 on the back of the cell 10 located at the end of the cell string 10 of the photovoltaic laminate 200; the cutting mechanism cuts at the marked position of the insulating structural member 20.

[0071] The insulating structural component 20 is formed in a roll shape and installed inside the process equipment used to process the photovoltaic laminate 200. First, multiple solar cells 10 are welded to multiple welding strips 11 to form a solar cell string 100. After the solar cell string 100 is completed in the welding mechanism, it enters the film-applying mechanism. The film-applying mechanism is started, and the cutting mechanism cuts the insulating structural component 20 from the winding structure, so that the first insulating layer of the insulating structural component 20 faces the solar cell 10. One insulating structural component 20 is located in the middle of the first solar cell 10 in the solar cell string 100, and the other is located in the middle of the last solar cell 10 in the solar cell string 100. The film-applying mechanism heats the insulating structural component 20, so that the insulating structural component 20 is fixed together with the solar cell 10. The battery string 100 is arranged in a conventional manner by the layout mechanism and flows into the welding mechanism. The busbar 14 is arranged according to the existing component polarity. The position of the busbar 14 is moved to the insulating structure 20 so that the busbar 14 can only be opposite to the through hole 23 of the insulating structure 20 and connected to the corresponding solder strip 11 of the through hole 23. The other polarity is completely insulated by the isolation strip to avoid short circuit problems. The welding process is used to weld the busbar 14 to the corresponding solder strip 11 to complete the stacking welding.

[0072] The integrated welding, film-applying, and cutting equipment not only achieves efficient processing of photovoltaic laminates 200 but also ensures accurate operation at each stage, improving product quality and reliability. Through precise welding, film-applying, and cutting processes, and because the insulation structure 20 is installed during the string welding process, it no longer needs to be placed separately, significantly improving the assembly efficiency of the insulation structure 20. This reduces production costs, simplifies the production process, enhances the overall production efficiency of photovoltaic modules, and improves product quality.

[0073] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0074] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more. In the description of this utility model, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

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

Claims

1. A photovoltaic laminate, characterized in that, include: At least one battery string layer, the battery string layer comprising a plurality of battery strings arranged sequentially along a first direction and extending along a second direction, wherein the first direction and the second direction are different; Multiple busbars are provided on the back side of the battery string layer and at both ends of the battery string along the second direction; An insulating layer is disposed between the battery string layer and the busbar. The insulating layer includes a plurality of insulating structural members, which are respectively disposed at both ends of the corresponding battery string along the second direction. The insulating structural members extend along the first direction and are spaced apart in the first direction. A plurality of through holes are formed on the plurality of insulating structural members, which are spaced apart. The battery string and the busbar are electrically connected at the through holes.

2. The photovoltaic laminate according to claim 1, characterized in that, Multiple battery strings are connected in series along the first direction.

3. The photovoltaic laminate according to claim 1, characterized in that, The polarities of two adjacent battery strings are opposite at the same end along the second direction.

4. The photovoltaic laminate according to claim 1, characterized in that, The distance between the through hole adjacent to the edge of the insulating structure along the first direction and the corresponding edge of the insulating structure is L1, wherein L1 satisfies: 3mm≤L1≤12mm.

5. The photovoltaic laminate according to claim 1, characterized in that, The insulating structural component includes: The first adhesive film layer includes an EVA layer, a POE layer, or a PVB layer. The second adhesive layer includes a PET layer, an FPF layer, or a PVC layer, and is disposed on the side of the first adhesive layer away from the battery string layer.

6. The photovoltaic laminate according to claim 1, characterized in that, The manifold is spaced apart from the corresponding edge of the through hole adjacent to at least one side edge along the second direction.

7. The photovoltaic laminate according to claim 1, characterized in that, The distance between at least one edge of the busbar along the second direction and the at least one edge of the through hole adjacent to the through hole is L2, wherein L2 satisfies: 2mm≤L2≤10mm.

8. The photovoltaic laminate according to claim 1, characterized in that, The distance between the busbar and the second direction is L3, and the distance between the insulating structural member and the second direction is L4. L3 and L4 satisfy: 10mm≤L4-L3≤20mm.

9. The photovoltaic laminate according to any one of claims 1-8, characterized in that, The battery string includes a first battery cell and a second battery cell, which are respectively disposed at both ends of the battery string along the second direction. The busbar and the insulating structure are respectively disposed on the back of the first battery cell and the second battery cell. Both the first and second battery cells have a first solder strip and a second solder strip on their back sides. The first solder strip and the second solder strip collect currents of different polarities. The insulating structure includes a first insulating member disposed on the back side of the first battery cell and a second insulating member disposed on the back side of the second battery cell. The first insulating member is spaced apart from one of the first solder strip and the second solder strip adjacent to the edge of the first battery cell along the first direction. The second insulating member is spaced apart from the other of the first solder strip and the second solder strip adjacent to the edge of the second battery cell along the first direction.

10. A photovoltaic module, characterized in that, Includes the photovoltaic laminate according to any one of claims 1-9.

Images