Double-sided double-glass photovoltaic module
By using translucent glass and single-sided mirror glass in double-sided double-glass photovoltaic modules, the two-way utilization of sunlight is achieved, the problem of insufficient light reception of the back cell is solved, the power generation efficiency and power generation are improved, and the cost is reduced.
Patent Information
- Application Number
- CN202323568238.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2033-12-25
AI Technical Summary
During use, the double-sided double-glass photovoltaic modules are used, because some sunlight passes directly through the gap between the cells, resulting in insufficient reflected light, insufficient light receiving of the cells on the back, and the power generation efficiency is lower than the theoretical value.
A double-sided double-glass photovoltaic module is designed, using translucent glass and single-sided mirror glass. Sunlight is transmitted to the front of the double-sided cell through the translucent glass for power generation. At the same time, part of the sunlight is reflected on the single-sided mirror glass through the gap of the cell, and then reflected to the back of the double-sided cell, so that the photovoltaic effect power generation can also be carried out on the back.
By increasing the photovoltaic power generation efficiency on the back, the overall power generation efficiency of the double-sided battery cells is improved, the power generation of the photovoltaic module is increased, and the kilowatt-hour cost of the module is reduced.
Smart Images
Figure CN222602906U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of photovoltaic assembly production and manufacturing, in particular to a double-sided double-glass photovoltaic assembly. Background Art
[0002] Photovoltaic modules are an important part of the production of photovoltaic power generation systems and photovoltaic application products. With the reduction of photovoltaic subsidies and the advent of the era of grid parity, under the huge pressure of continuous cost reduction, the technology of photovoltaic cells and modules has developed rapidly in recent years in various forms.
[0003] Double-sided double-glass photovoltaic modules can significantly increase the power generation of the system and reduce the power generation cost of the system. However, during use, some sunlight directly passes through the gaps between the cells and directly passes through the back glass, resulting in insufficient reflected light. The back cells are not exposed to enough light, resulting in the cell power generation efficiency being far lower than the theoretical value. Utility Model Content
[0004] In order to solve the above technical problems, the embodiment of the utility model provides a double-sided double-glass photovoltaic module, and the double-sided double-glass photovoltaic module comprises:
[0005] One or more bifacial cells for absorbing sunlight and generating electricity through the photovoltaic effect;
[0006] Translucent glass, located on the front side of the bifacial cell, for allowing sunlight to pass through the translucent glass and reach the front side of the bifacial cell; and
[0007] The single-sided mirror glass is located on the back side of the double-sided cell sheet and is used to reflect sunlight to the back side of the double-sided cell sheet.
[0008] In some embodiments, the double-sided double-glass photovoltaic module further includes a first high light-transmittance adhesive film located between the front side of the double-sided cell and the light-transmitting glass.
[0009] In some embodiments, the first high light transmittance adhesive film is a POE adhesive film.
[0010] In some embodiments, the double-sided double-glass photovoltaic module further includes a second high light transmittance adhesive film located between the single-sided mirror glass and the back side of the double-sided cell.
[0011] In some embodiments, the second high light transmittance adhesive film is a POE adhesive film.
[0012] In some embodiments, the light-transmitting glass is semi-tempered glass.
[0013] In some embodiments, the single-sided mirror glass is a semi-tempered single-sided mirror glass.
[0014] In some embodiments, the bifacial cell is a bifacial crystalline silicon cell.
[0015] In some embodiments, the double-sided double-glass photovoltaic module further includes an aluminum alloy frame located at the outer edge of the photovoltaic module for encapsulating the photovoltaic module.
[0016] In some embodiments, the double-sided double-glass photovoltaic module further includes a bus bar for connecting the double-sided cells in series and transmitting energy.
[0017] The utility model can produce the following beneficial effects: sunlight is incident on the front side of the double-sided cell through the front light-transmitting glass to generate electricity through the photovoltaic effect. At the same time, part of the sunlight is reflected to the back side of the double-sided cell through the single-sided mirror glass, so that the back side of the double-sided cell can also generate electricity through the photovoltaic effect, which greatly improves the power generation efficiency of the double-sided cell, increases the power generation of the photovoltaic module, and reduces the cost of the module for electricity. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 It is a schematic diagram of the internal structure of Embodiment 1 of the present utility model;
[0020] Figure 2 It is a schematic diagram of embodiment 1 of the utility model;
[0021] Figure 3 It is a schematic diagram of the internal structure of Embodiment 2 of the present utility model;
[0022] Figure 4 It is a schematic diagram of Embodiment 2 of the present utility model;
[0023] Figure 5 It is a front structural schematic diagram of the utility model;
[0024] Figure 6 is a schematic diagram of the back structure of the utility model; and
[0025] Figure 7 It is a side structural schematic diagram of the utility model.
[0026] Description of reference numerals:
[0027] 1. Translucent glass; 2. Highest light-transmittance adhesive film; 3. Double-sided battery cell; 4. Second highest light-transmittance adhesive film; 5. Single-sided mirror glass; 6. Aluminum alloy frame; 7. Bus bar; 8. Junction box. DETAILED DESCRIPTION
[0028] The following is a further detailed description of the implementation of the utility model in conjunction with the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
[0029] The utility model provides these embodiments to make the disclosure thorough and complete, and to fully express the scope of the utility model to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values described in these embodiments should be interpreted as merely exemplary, rather than as limiting.
[0030] It should be noted that, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0031] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.
[0032] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.
[0033] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.
[0034] The techniques, methods and devices known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, the techniques, methods and devices should be considered as part of the specification. Example 1
[0035] See also Figure 1 Embodiment 1 of the utility model provides a double-sided double-glass photovoltaic module, which includes: one or more double-sided battery cells 3, which are used to absorb sunlight and generate electricity through photovoltaic effect; a light-transmitting glass 1, which is located on the front side of the double-sided battery cell 3 and is used to allow sunlight to pass through the light-transmitting glass and reach the front side of the double-sided battery cell; and a single-sided mirror glass 5, which is located on the back side of the double-sided battery cell 3 and is used to reflect sunlight to the back side of the double-sided battery cell 3.
[0036] Specifically, the light-transmitting glass 1 of this embodiment has high light transmittance, and its light transmittance is greater than or equal to 94%. It can be tempered glass or semi-tempered glass, and semi-tempered glass is preferably used as the light-transmitting glass 1;
[0037] Specifically, the single-sided mirror glass of this embodiment can be a tempered single-sided mirror glass or a semi-tempered single-sided mirror glass, and the semi-tempered single-sided mirror glass is preferably used as the single-sided mirror glass;
[0038] Specifically, the bifacial cell 3 of this embodiment can be a crystalline silicon cell or an amorphous silicon cell, and a crystalline silicon cell is preferably used as the bifacial cell 3 .
[0039] See also Figure 2 , Figure 2 This is the principle diagram of Example 1. Sunlight passes through the light-transmitting glass 1 and shines into the front side of the double-sided battery cell 3, causing the front side of the double-sided battery cell 3 to generate electricity through the photovoltaic effect. Part of the sunlight passes through the gap between the double-sided battery cell 3 and enters the single-sided mirror glass 5 for reflection. The reflected sunlight shines on the back side of the double-sided battery cell 3, causing the back side of the double-sided battery cell 3 to also generate electricity through the photovoltaic effect.
[0040] This embodiment can produce the following beneficial effects: sunlight is incident on the front side of the bifacial cell through the front light-transmitting glass to generate electricity through the photovoltaic effect. At the same time, part of the sunlight is reflected to the back side of the bifacial cell, so that the back side of the bifacial cell can also generate electricity through the photovoltaic effect, which greatly improves the power generation efficiency of the bifacial cell, increases the power generation of the photovoltaic module, and reduces the cost of the module.
[0041] Example 2
[0042] See also Figure 3 Embodiment 2 of the utility model provides a double-sided double-glass photovoltaic module. In addition to the device in Embodiment 1, the double-sided double-glass photovoltaic module may also include a first high-light-transmittance adhesive film 2 and a second high-light-transmittance adhesive film 4. The first high-light-transmittance adhesive film 2 is located between the front side of the double-sided battery cell 3 and the light-transmitting glass 1, and the second high-light-transmittance adhesive film 4 is located between the single-sided mirror glass 5 and the back side of the double-sided battery cell 3.
[0043] See also Figure 4 , Figure 4 This is the principle diagram of Example 2. Sunlight passes through the transparent glass 1, passes through the first high-light-transmittance adhesive film 2, and shines into the front side of the double-sided battery cell 3, causing the front side of the double-sided battery cell 3 to generate electricity through the photovoltaic effect. Part of the sunlight passes through the gap between the double-sided battery cells 3 and is reflected by the single-sided mirror glass 5, passes through the second high-light-transmittance adhesive film 4, and the reflected sunlight shines on the back side of the double-sided battery cell 3, causing the back side of the double-sided battery cell 3 to also generate electricity through the photovoltaic effect.
[0044] The high light transmittance of the first high light transmittance film 2 and the second high light transmittance film 4 of this embodiment is reflected in that: after the lamination process, the first high light transmittance film 2 and the second high light transmittance film 4 are melted and pasted on the front and back of the double-sided battery sheet, and the light transmittance of the melted first high light transmittance film 2 and the second high light transmittance film 4 is greater than or equal to 90%. The first high light transmittance film 2 and the second high light transmittance film 4 can be EVA film or POE film, and POE film is preferably used as the first high light transmittance film 2 and the second high light transmittance film 4.
[0045] This embodiment can produce the following beneficial effects: sunlight passes through the front of the photovoltaic module, through the light-transmitting glass and the first high-light-transmitting adhesive film, and reaches the front of the double-sided cell, so that the front of the double-sided cell generates electricity through the photovoltaic effect. At the same time, part of the sunlight passes through the gaps between the cells and reaches the single-sided mirror glass. The single-sided mirror glass reflects the sunlight, so that the reflected light passes through the second high-light-transmitting adhesive film and reaches the back of the double-sided cell, so that the back of the double-sided cell also generates electricity through the photovoltaic effect, which greatly improves the double-sided power generation efficiency of the double-sided cell, increases the power generation of the photovoltaic module, and reduces the cost of the module.
[0046] The embodiment of the utility model provides an installation process for a double-sided double-glass photovoltaic module.
[0047] S101: Welding: Arrange the bifacial battery cells 3, and connect the bifacial battery cells 3 in series and in parallel through the busbars 7 to form a complete output circuit;
[0048] S102: Lamination: Covering the first high light transmittance adhesive film 2 and the second high light transmittance adhesive film 4 on the front and back sides of the double-sided solar cell 3 respectively;
[0049] S103: Lamination: Melt the first high light transmittance adhesive film 2 and the second high light transmittance adhesive film 4 to bond the first high light transmittance adhesive film 2 and the second high light transmittance adhesive film 4 to the double-sided battery cell 3 to form a semi-finished component.
[0050] S104: framing: encapsulating the semi-finished components with aluminum alloy frames 6; and
[0051] S105: Junction box installation: The junction box 8 is installed on the back of the photovoltaic module; the junction box 8 leads out the bus bar 7 and is installed on the back of the photovoltaic module to form a completed photovoltaic module.
[0052] See also Figure 5 , this embodiment provides a front view of a double-sided double-glass photovoltaic module.
[0053] See also Figure 6 , this embodiment provides a back view of a double-sided double-glass photovoltaic module.
[0054] See also Figure 7 , this embodiment provides a side view of a double-sided double-glass photovoltaic module.
[0055] The utility model can generate electricity on the front side of the bifacial cell while greatly reflecting the sunlight that passes through the gaps between the cells to the back side of the bifacial cell, so that the back side of the bifacial cell also generates electricity through the photovoltaic effect, increasing the bifacial power generation efficiency of the cell, increasing the power generation, and reducing the cost of the component electricity. It has the effect of saving costs, improving product quality, and improving power generation efficiency. So far, the various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.
[0056] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.
Claims
1. A double-sided double-glass photovoltaic module, characterized in that: include: One or more bifacial cells (3) for absorbing sunlight and generating electricity through photovoltaic effect; A light-transmitting glass (1) is located on the front side of the double-sided battery cell (3) and is used to allow sunlight to pass through the light-transmitting glass and reach the front side of the double-sided battery cell (3); as well as A single-sided mirror glass (5) is located on the back side of the double-sided battery cell (3) and is used to reflect sunlight onto the back side of the double-sided battery cell (3); A bus bar (7), wherein the bus bar (7) connects the double-sided battery sheets (3) in series and in parallel to form a complete output circuit.
2. The double-sided double-glass photovoltaic module according to claim 1, characterized in that: The double-sided double-glass photovoltaic module also includes: The first high light-transmittance adhesive film (2) is located between the front surface of the double-sided cell sheet (3) and the light-transmitting glass (1).
3. The double-sided double-glass photovoltaic module according to claim 2, characterized in that: The first high light transmittance adhesive film (2) is a POE adhesive film.
4. The double-sided double-glass photovoltaic module according to claim 1, characterized in that: The double-sided double-glass photovoltaic module also includes: The second high light transmittance adhesive film (4) is located between the single-sided mirror glass (5) and the back surface of the double-sided battery cell (3).
5. The double-sided double-glass photovoltaic module according to claim 4, characterized in that: The second high light transmittance adhesive film (4) is a POE adhesive film.
6. The double-sided double-glass photovoltaic module according to claim 1, characterized in that: The light-transmitting glass is semi-tempered glass.
7. The double-sided double-glass photovoltaic module according to claim 1, characterized in that: The single-sided mirror glass (5) is semi-tempered single-sided mirror glass.
8. The double-sided double-glass photovoltaic module according to any one of claims 1 to 7, characterized in that: The double-sided cell (3) is a double-sided crystalline silicon cell.
9. The double-sided double-glass photovoltaic module according to any one of claims 1 to 7, characterized in that: The double-sided double-glass photovoltaic module also includes an aluminum alloy frame (6) located at the outer edge of the photovoltaic module and used for encapsulating the photovoltaic module.