Photovoltaic tile adopting back contact solar cell

Abstract

The invention relates to the technical field of solar cell photovoltaic tiles, in particular to a back contact solar cell photovoltaic tile which comprises a CELL conductive plate, ETFE is arranged on the top of the CELL conductive plate, EVA is installed at the bottom of the ETFE, a transparent back plate is installed at the bottom of the EVA, the bottom face of the transparent back plate is connected with second ETFE, the bottom face of the second ETFE is connected with EPE, and TCO conductive glass is arranged at the bottom of the EPE. The bottom surface of the TCO conductive glass is connected with a second EVA, the bottom surface of the second EVA is provided with tempered glass, the bottom surface of the tempered glass is provided with a third EVA, and the bottom surface of the third EVA is connected with TPO. According to the photovoltaic tile adopting the back contact solar cell, the latest TOPCon cell piece technology, a brand-new assembly packaging mode and an optimized circuit are adopted, so that the efficiency of an assembly is greatly improved compared with that of a conventional assembly, the connection mode of the back contact cell and the conductive back plate does not adopt a welding strip connection assembly, and the combination of copper foil, conductive adhesive and an insulating plate is adopted, so that the assembly efficiency is greatly improved. Stress stacking is completely eradicated, and subfissure of the battery piece is fundamentally eradicated.

Description

Technical Field

[0001] The invention relates to the technical field of solar cell photovoltaic tiles, in particular to a photovoltaic tile using a back contact solar cell. Background Art

[0002] With the advancement of component technology, competition in the conventional component market has become increasingly fierce, so the unconventional component market is being developed. Photovoltaic tile products are regarded as potential customers for self-built houses in rural areas across the country, roofs of high-rise buildings in residential areas, and roofs abroad. In the face of the huge number of properties, it can be seen that the market size and market development prospects of photovoltaic tiles are very objective.

[0003] The conventional framed components are manufactured by connecting the cells with a welding ribbon, and then laminating the cells with conventional glass and adhesive films to form a frame.

[0004] Conventional framed modules have limited installation areas, complex installation methods, require special brackets for support, and have high building load requirements. Conventional framed modules have reduced efficiency and low light energy utilization. The use of welding ribbons to connect the cells can easily cause stress accumulation in the cells, leading to hidden cracks in the cells.

[0005] To this end, we urgently need to provide a photovoltaic tile using back-contact solar cells. Summary of the invention

[0006] The object of the present invention is to provide a photovoltaic tile using back-contact solar cells to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a photovoltaic tile using a back-contact solar cell, comprising a CELL conductive plate, wherein ETFE is arranged on the top of the CELL conductive plate, EVA is installed on the bottom of the ETFE, a transparent back plate is installed on the bottom of the EVA, the bottom surface of the transparent back plate is connected to ETFE 2, the bottom surface of ETFE 2 is connected to EPE, TCO conductive glass is arranged on the bottom of the EPE, the bottom surface of the TCO conductive glass is connected to EVA 2, the bottom surface of EVA 2 is installed with tempered glass, the bottom surface of EVA 3 is installed on the bottom of the tempered glass, and the bottom surface of EVA 3 is connected to TPO.

[0008] Preferably, the middle of the top surface of the TCO conductive glass is connected to the bottom surface of the CELL conductive plate, the three bottom surfaces of the EVA are connected to the right end of the top surface of the TPO, and the middle of the bottom surface of the EPE is connected to the top surface of the CELL conductive plate.

[0009] Preferably, the photovoltaic tile structure contains at least CELL and TCO conductive plates, the ETFE 1, transparent backboard, and ETFE 2 contain at least one, the EVA 1 and EPE contain at least one, the tempered glass and TPO contain at least one, and the EVA 2 and EVA 3 contain at least one, and at least one of them can be combined with each other to form a new photovoltaic tile.

[0010] Preferably, the number of single-pass batteries of the photovoltaic tile can be increased or decreased arbitrarily, and the battery can have a multi-series structure.

[0011] Preferably, the photovoltaic tiles are made of ETFE and TPO material structures, have a specific stacking structure when stacked, and use a combination of back contact cells and conductive glass. The circuit pattern of the conductive glass and the lightness of the product itself are more conducive to rooftop installation.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The back-contact solar cell photovoltaic tile is adopted, and the installation method of the component of the present invention is more flexible, and can be flexibly installed, glued, etc., thereby increasing the scope of use of the product.

[0014] 2. The back-contact solar cell photovoltaic tile adopts the latest TOPCon cell process, a new component packaging method, and an optimized circuit to greatly improve the efficiency of the component compared to conventional components.

[0015] 3. The photovoltaic tile adopts back-contact solar cell. The present invention adopts the connection method of back-contact cell and conductive back plate, does not use welding strip to connect components, and adopts the combination of copper foil, conductive glue and insulating plate to prevent stress stacking and fundamentally prevent hidden cracks of battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0017] Figure 1 It is a side structural diagram of the present invention;

[0018] Figure 2 A circuit diagram of the present invention;

[0019] Figure 3 is a dimensional diagram of the present invention;

[0020] Figure 4 A diagram of a back contact battery of the present invention;

[0021] Figure 5 The circuit diagram of the TCO battery of the present invention;

[0022] Figure 6 A detailed diagram of the battery circuit of the present invention;

[0023] Figure 7 This is the overall circuit diagram of the TCO glass of the present invention.

[0024] In the figure: 1. ETFE 1; 2. EVA 1; 3. Transparent back panel; 4. ETFE 2; 5. EPE; 6. TCO conductive glass; 7. EVA 2; 8. Tempered glass; 9. EVA 3; 10. TPO. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See also Figure 1-Figure 7The present invention provides a technical solution: a photovoltaic tile using a back contact solar cell, including a CELL conductive plate, ETFE1 is arranged on the top of the CELL conductive plate, EVA2 is installed on the bottom of ETFE1, a transparent back plate 3 is installed on the bottom of EVA2, the bottom surface of the transparent back plate 3 is connected to ETFE24, the bottom surface of ETFE24 is connected to EPE5, TCO conductive glass 6 is arranged on the bottom of EPE5, the bottom surface of TCO conductive glass 6 is connected to EVA27, tempered glass 8 is installed on the bottom surface of EVA27, EVA39 is installed on the bottom surface of tempered glass 8, and TPO10 is connected to the bottom surface of EVA39. The middle of the top surface of TCO conductive glass 6 is connected to the bottom surface of CELL conductive plate, the bottom surface of EVA39 is connected to the right end of the top surface of TPO10, and the middle of the bottom surface of EPE5 is connected to the top surface of CELL conductive plate. ETFE1 is ethylene tetrafluoroethylene copolymer, EVA is ethylene-vinyl acetate copolymer, EPE is EVA+POE+EVA, and TPO is thermoplastic polyolefin.

[0028] The photovoltaic tile structure contains at least CELL and TCO conductive plates, ETFE-1, transparent backplane 3, ETFE-4 contains at least one, EVA-2, EPE5 contains at least one, tempered glass 8, TPO10 contains at least one, EVA-27, EVA-39 contains at least one, and at least one of them can be combined with each other to form a new photovoltaic tile.

[0029] The number of cells in photovoltaic tiles can be increased or decreased at will, and the cells can have a multi-series structure. Photovoltaic tiles use ETFE and TPO material structures, have a specific stacking structure when stacked, and use a combination of back contact cells and conductive glass. The circuit pattern of the conductive glass and the lightness of the product itself are more conducive to roof installation.

[0030] Instructions attached Figure 5 The circuit diagram in the figure uses a laser beam to laser scribe mask lines on the TCO conductive film layer on the TCO conductive glass 6, uses the mask lines for insulation, and uses the TCO film layer to lead out the positive and negative currents of the back contact battery to form a circuit diagram of a single battery. Then, several batteries are connected in series to form a battery series connection, and then conductive glue and busbars are used to converge the currents to form a circuit. Figure 6 The red line in the middle is the laser-scribed mask line that separates the blue positive electrode and the green negative electrode.

[0031] First, select the TCO conductive glass 6 according to the size of the component, then apply conductive glue on the fixed position diagram, then design the laser pattern according to the circuit of the back contact battery, then quickly carve out the insulating line, and then quickly stick the back contact battery to the carved TCO conductive glass 6, and then stack the remaining materials on the battery cell according to the style of the structural diagram, and then enter the laminator for finalization to complete the component production process.

[0032] The structure of this photovoltaic tile is completely different from that of existing photovoltaic modules. 1. The use of back-contact cells means that there is no main grid line on the front of the solar module, which increases the effective utilization area of ​​the solar module and increases power output. 2. The use of ETFE (ethylene tetrafluoroethylene copolymer) and TPO (thermoplastic polyolefin) 10, materials rarely used in solar modules, through a specific solar module structure, makes the product come with waterproof materials when installed on the roof, combining solar energy with waterproof building materials.

[0033] This photovoltaic tile is completely different from the existing photovoltaic module circuit design. It uses 182 or (other specifications of solar cells) in series. In view of the length of the module and the possible obstruction at the installation position, one string is split into two paths and isolated by diodes. When the module is blocked, the diode is activated and the battery in parallel with the diode is short-circuited to protect the module from hot spots.

[0034] The present invention is by no means a simple stacking of materials, but a creative selection of non-traditional photovoltaic materials, bold use of ETFE, TPO10 and other building materials, effectively combining building materials with photovoltaic power generation, creating a precedent for rooftop photovoltaic building materials.

[0035] The assembly mode of back contact battery + TCO conductive glass 6 adopted by the present invention effectively combines the laser process.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0037] Although 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 appended claims and their equivalents.

Claims

1. A photovoltaic tile using a back contact solar cell, comprising a CELL conductive plate, characterized in that: The top of the CELL conductive plate is provided with ETFE (1), the bottom of the ETFE (1) is installed with EVA (2), the bottom of the EVA (2) is installed with a transparent back plate (3), the bottom of the transparent back plate (3) is connected with ETFE II (4), the bottom of the ETFE II (4) is connected with EPE (5), the bottom of the EPE (5) is provided with TCO conductive glass (6), the bottom of the TCO conductive glass (6) is connected with EVA II (7), the bottom of the EVA II (7) is installed with tempered glass (8), the bottom of the tempered glass (8) is installed with EVA III (9), and the bottom of the EVA III (9) is connected with TPO (10).

2. The photovoltaic tile using back contact solar cells according to claim 1, characterized in that: The middle of the top surface of the TCO conductive glass (6) is connected to the bottom surface of the CELL conductive plate, the bottom surface of the EVA (9) is connected to the right end of the top surface of the TPO (10), and the middle of the bottom surface of the EPE (5) is connected to the top surface of the CELL conductive plate.

3. The photovoltaic tile using back contact solar cells according to claim 1, characterized in that: The photovoltaic tile structure contains at least CELL and TCO conductive plates, wherein the ETFE 1 (1), the transparent back plate (3), and the ETFE 2 (4) contain at least one, the EVA 1 (2) and the EPE (5) contain at least one, the tempered glass (8) and the TPO (10) contain at least one, and the EVA 2 (7) and the EVA 3 (9) contain at least one, and at least one of them can be combined with each other to form a new photovoltaic tile.

4. The photovoltaic tile using back contact solar cells according to claim 1, characterized in that: The number of cells in a photovoltaic tile can be increased or decreased arbitrarily, and the cells can have a multi-series structure.

5. The photovoltaic tile using back contact solar cells according to claim 1, characterized in that: Photovoltaic tiles are made of ETFE and TPO materials and have a specific stacking structure when stacked. The combined application of back contact cells and conductive glass, the circuit pattern of the conductive glass, and the lightweight nature of the product itself are more conducive to rooftop installation.

Images