A multi-faceted photovoltaic assembly

Abstract

The utility model discloses a kind of multi-slice photovoltaic modules, including frame assembly and the power generation component of being arranged in the inside of frame assembly, power generation component includes cell group, the front surface of cell group is connected with glass panel by adhesive film layer, the back of cell group is connected with back plate by adhesive film layer;The bottom surface of back plate is distributed with honeycomb rib, the inside of back plate is embedded with netlike heat conducting layer.The utility model honeycomb rib on back plate increases the heat dissipation area of back plate bottom surface, improves the heat dissipation effect of back plate, the heat conducting efficiency of its inside heat conducting layer improves the heat dissipation effect of back plate, further improves the heat dissipation performance of multi-slice photovoltaic module, reduces its failure rate, prolongs its service life;And the setting of rib and heat conducting layer can also improve the strength of back plate, and then improve the protection effect of photovoltaic module to cell piece, further reduce the failure rate of photovoltaic module.

Description

Technical Field

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

[0002] Multi-cell photovoltaic modules (such as half-cell, three-cell, and four-cell modules) have significant advantages in improving power density and reducing hot spot effects by dividing traditional whole solar cells into smaller units.

[0003] Existing multi-cell photovoltaic modules have a large number of solar cells and a higher solder joint density than conventional modules. This results in concentrated resistance heat from the solder ribbons and contact resistance heat, and the narrow spacing between the small cells makes it difficult for heat to dissipate naturally. This leads to localized high temperatures in photovoltaic modules, which can easily cause hot spot effects, accelerate encapsulant aging and solder joint oxidation, resulting in faster module power degradation. Long-term high temperatures can also reduce the stability of the cell passivation layer and shorten the module's lifespan.

[0004] Therefore, it is necessary to improve the existing multi-segment photovoltaic modules. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a multi-segment photovoltaic module that improves the heat dissipation performance of the photovoltaic module.

[0006] To achieve the above objectives, the specific technical solution of the multi-segment photovoltaic module of this utility model is as follows: A multi-segment photovoltaic module includes a frame assembly and a power generation component disposed inside the frame assembly. The power generation component includes a cell array. A glass panel is connected to the front side of the cell array through an adhesive film layer, and a backsheet is connected to the back side of the cell array through an adhesive film layer. The bottom surface of the backsheet has honeycomb-shaped ribs, and a mesh-like heat-conducting layer is embedded inside the backsheet.

[0007] Preferably, the frame assembly includes four frame profiles, with adjacent frame profiles connected to each other by corner brackets. Each frame profile has an insertion groove that engages with the edge of the power generation component and an abutment portion that fits against the back plate. A sealing ring is circumferentially wrapped around the four edges of the power generation component.

[0008] Preferably, the abutting portion is integrally formed on the frame profile along the extension direction of the frame profile, and the abutting portion is in surface contact with the bottom surface of the back plate.

[0009] Preferably, the thermally conductive layer is distributed in an S-shape inside the back plate.

[0010] Preferably, the crests and troughs of the S-shaped heat-conducting layer are flush with the top and bottom surfaces of the back plate, respectively.

[0011] Preferably, the battery cell group includes multiple battery strings, each battery string is connected in parallel with each other through a bus bar, and a heat-conducting strip is provided between two adjacent battery strings.

[0012] Preferably, the heat-conducting strip is a hollow tubular structure.

[0013] Preferably, the busbar is positioned directly below the battery string, and an insulating pad is provided between the busbar and the battery string.

[0014] Preferably, the insulating pad is a thermally conductive silicone pad.

[0015] The multi-segment photovoltaic module of this invention has the following advantages: the honeycomb-shaped ribs on the backsheet increase the heat dissipation area of ​​the bottom surface of the backsheet, improving the heat dissipation effect of the backsheet; the internal thermal conductive layer improves the heat conduction efficiency of the backsheet, further improving the heat dissipation effect of the backsheet, thereby improving the heat dissipation performance of the multi-segment photovoltaic module, reducing its failure rate, and extending its service life; in addition, the setting of ribs and thermal conductive layer can also improve the strength of the backsheet, thereby improving the protection effect of the photovoltaic module on the cells, further reducing the failure rate of the photovoltaic module. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the photovoltaic module of this utility model; Figure 2 This is an exploded view of the photovoltaic module of this utility model; Figure 3 This is a structural schematic diagram of the frame profile of this utility model; Figure 4 This is a schematic diagram of the structure of the back plate of this utility model; Figure 5 This is a cross-sectional view of the back plate of this utility model; Figure 6 This is a schematic diagram of the structure of the battery cell assembly of this utility model; Figure 7 for Figure 6 Enlarged view of part A; The markings in the diagram are as follows: 1. Power generation component; 2. Frame component; 3. Sealing ring; 101. Glass panel; 102. Adhesive film layer; 103. Battery cell assembly; 104. Backplate; 201. Frame profile; 202. Corner bracket; 1031. Busbar; 1032. Battery string; 1033. Thermal strip; 1034. Insulating pad; 1041. Thermal conductive layer; 1042. Rib; 2011. Connecting slot; 2012. Abutment part. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0018] The terms "top surface," "bottom surface," and "full surface" are used with reference to the normal operating state of the photovoltaic module and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] like Figure 1 , 4 As shown in Figure 5, a vertically slicing multi-segment photovoltaic module includes a frame assembly 2 and a power generation assembly 1 disposed inside the frame assembly 2. The power generation assembly 1 includes a cell array 103. A glass panel 101 is connected to the front side of the cell array 103 through an adhesive film layer 102, and a back sheet 104 is connected to the back side of the cell array 103 through an adhesive film layer 102. The bottom surface of the back sheet 104 is distributed with honeycomb-shaped ribs 1042, and a mesh-like heat-conducting layer 1041 is embedded inside the back sheet 104.

[0020] The aforementioned photovoltaic module addresses the severe heat generation issue caused by the large number and density of cells and solder joints in multi-cell photovoltaic modules. The backsheet 104 is made of one or more of the following materials: PVF, PVDF, PET, THV, and EVA. Ribs 1042 on the bottom surface of the backsheet 104 increase its heat dissipation area, improving heat dissipation. The honeycomb ribs 1042 also effectively enhance the structural strength of the backsheet 104. The thermally conductive layer 1041, a mesh structure woven from aluminum alloy filaments, is embedded within the backsheet 104, improving its thermal conductivity and further enhancing its heat dissipation. The thermally conductive layer 1041 also strengthens the backsheet 104, increasing its robustness. Thus, the backsheet 104 improves the heat dissipation of the multi-cell photovoltaic module and strengthens its structural strength, thereby reducing the failure rate and extending its service life.

[0021] Further improvements include, for example Figure 2 and 3As shown, the frame assembly 2 includes four frame profiles 201. Adjacent frame profiles 201 are connected to each other via corner brackets 202. Each frame profile 201 has an insertion groove 2011 that engages with the edge of the power generation module 1 and an abutment portion 2012 that fits against the back panel 104. A sealing ring 3 is circumferentially wrapped around the edges of the power generation module 1. Specifically, the frame profiles 201 are made of aluminum alloy. The sealing ring 3 improves the sealing effect on the edges of the power generation module 1, thereby reducing the probability of dust or moisture intrusion between the layers of the power generation module 1 and lowering the failure rate of the photovoltaic module.

[0022] Further improvements include, for example Figure 3 As shown, the abutment portion 2012 is integrally formed on the frame profile 201 along the extension direction of the frame profile 201, and the abutment portion 2012 is in surface contact with the bottom surface of the back panel 104. Specifically, the surface contact between the abutment portion 2012 and the bottom surface of the back panel 104 can provide support for the back panel 104 and improve the stability of the installation; secondly, after the abutment portion 2012 contacts the back panel 104, a heat conduction channel is formed between the two, which can conduct heat from the back panel 104 to the frame profile 201, thereby accelerating the heat dissipation speed of the back panel 104 and improving the heat dissipation effect of the photovoltaic module.

[0023] Further improvements include, for example Figure 5 As shown, the thermally conductive layer 1041 is distributed in an S-shape inside the backsheet 104. The S-shaped thermally conductive layer 1041 can increase its distribution range inside the backsheet 104, further improving the heat conduction efficiency of the backsheet 104, thereby improving the heat dissipation efficiency of the photovoltaic module.

[0024] A further improvement is that the peaks and troughs of the S-shaped thermal conductive layer 1041 are flush with the top and bottom surfaces of the backsheet 104, respectively. Specifically, the aforementioned thermal conductive layer 1041 can form a heat conduction channel between the top and bottom surfaces of the backsheet 104, accelerating the heat conduction along the thickness direction of the backsheet 104, thereby improving the heat dissipation effect of the backsheet 104 and further enhancing the heat dissipation efficiency of the photovoltaic module.

[0025] Further improvements include, for example Figure 6 and 7As shown, the solar cell array 103 includes multiple cell strings 1032, which are connected in parallel via busbars 1031. A heat-conducting strip 1033 is positioned between adjacent cell strings 1032. Each cell string 1032 includes multiple solar cells connected in series via solder strips. The edges of the solar cells are passivated. The heat-conducting strip 1033, made of thermally conductive silicone, is positioned between the cell strings 1032 to provide positioning and buffering between them. Furthermore, the heat-conducting strip 1033 accelerates heat transfer between the cell strings 1032, improving the heat dissipation of the photovoltaic module. The heat-conducting strip 1033 is a hollow tubular structure. The tubular heat-conducting strip 1033 can further enhance the heat dissipation of the photovoltaic module by increasing the efficiency of heat transfer through convection of the air inside.

[0026] Further improvements include, for example Figure 7 As shown, the busbar 1031 is positioned directly below the battery string 1032, and an insulating pad 1034, which is a thermally conductive silicone pad, is placed between the busbar 1031 and the battery string 1032. Positioning the busbar 1031 below the battery string 1032 reduces the area occupied by the busbar 1031 within the photovoltaic module, allowing for the placement of more solar cells inside the module and thus improving its power generation efficiency. The insulating pad 1034 provides insulation and isolation for the busbar 1031, preventing short circuits within the photovoltaic module. Furthermore, the thermally conductive silicone material enables the insulating pad 1034 to conduct heat, accelerating heat transfer to the backsheet 104, improving the heat dissipation of the photovoltaic module, and reducing its failure rate.

[0027] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A vertically slicing multi-segment photovoltaic module, comprising a frame assembly (2) and a power generation module (1) disposed inside the frame assembly (2), characterized in that: The power generation component (1) includes a battery cell group (103), with a glass panel (101) connected to the front side of the battery cell group (103) through an adhesive film layer (102), and a back plate (104) connected to the back side of the battery cell group (103) through an adhesive film layer (102). The bottom surface of the back plate (104) is provided with honeycomb-shaped ribs (1042), and a mesh-like heat-conducting layer (1041) is embedded inside the back plate (104).

2. The vertically slicing multi-cell photovoltaic module according to claim 1, characterized in that, The frame assembly (2) includes four frame profiles (201), and two adjacent frame profiles (201) are connected to each other by corner brackets (202). The frame profiles (201) have insertion grooves (2011) that fit into the edge of the power generation assembly (1) and abutment portions (2012) that fit into the back plate (104). The four edges of the power generation assembly (1) are circumferentially wrapped with sealing rings (3).

3. The vertically slicing multi-cell photovoltaic module according to claim 2, characterized in that, The abutting part (2012) is integrally formed on the frame profile (201) along the extension direction of the frame profile (201), and the abutting part (2012) is in surface contact with the bottom surface of the back plate (104).

4. The vertically slicing multi-segment photovoltaic module according to claim 1, characterized in that, The thermally conductive layer (1041) is distributed in an S-shape inside the back plate (104).

5. The vertically slicing multi-cell photovoltaic module according to claim 4, characterized in that, The peaks and troughs of the S-shaped heat-conducting layer (1041) are flush with the top and bottom surfaces of the back plate (104), respectively.

6. The vertically slicing multi-segment photovoltaic module according to claim 1, characterized in that, The battery cell group (103) includes multiple battery strings (1032), each battery string (1032) is connected in parallel with each other through a bus bar (1031), and a heat-conducting strip (1033) is provided between two adjacent battery strings (1032).

7. The vertically slicing multi-cell photovoltaic module according to claim 6, characterized in that, The heat-conducting strip (1033) is a hollow tubular structure.

8. The vertically slicing multi-cell photovoltaic module according to claim 6, characterized in that, The busbar (1031) is located directly below the battery string (1032), and an insulating pad (1034) is provided between the busbar (1031) and the battery string (1032).

9. The vertically slicing multi-cell photovoltaic module according to claim 8, characterized in that, The insulating pad (1034) is a thermally conductive silicone pad.

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