Photovoltaic module and photovoltaic power generation system with same
By setting up a folded second packaging film in the photovoltaic module, the problem of water vapor entering causes corrosion of the battery cell is solved, the power generation and usage performance are improved, and the production cost is reduced.
Patent Information
- Application Number
- CN202420477360.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-03-12
AI Technical Summary
When the photovoltaic module works outdoors, water vapor is easily entered from the edge of the module, causing corrosion of the gate lines of the battery cells and reducing power generation.
By providing a second packaging film in the photovoltaic module, its outer peripheral edge is folded toward one side of the first cover plate to cover at least the side of the cell layer, thereby preventing water vapor from entering.
It effectively avoids corrosion of water vapor on the battery layer, improves the power generation and usage performance of photovoltaic modules, and reduces production costs.
Smart Images
Figure CN222509874U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic component and a photovoltaic power generation system having the same. Background Art
[0002] Photovoltaic power generation is a technology that uses the photovoltaic effect of semiconductor interfaces to directly convert light energy into electrical energy. The key component of this technology is solar cells. After being connected in series and packaged for protection, solar cells can form a large-area solar cell module, which is then combined with power controllers and other components to form a photovoltaic power generation device. The advantage of photovoltaic power generation is that it is less restricted by geographical location because the sun shines on the earth. Photovoltaic systems are also safe and reliable, noise-free, low-pollution, can generate electricity and supply power locally without consuming fuel and setting up transmission lines, and have a short construction period.
[0003] When photovoltaic modules are working outdoors, water vapor can easily enter from the edge of the photovoltaic module and reach the edge cells, corroding the grid lines of the edge cells, resulting in reduced power generation. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a photovoltaic module that can effectively prevent water vapor from contacting the battery sheet from the side of the battery sheet layer, thereby increasing the power generation of the photovoltaic module.
[0005] Another object of the present invention is to provide a photovoltaic power generation system using the above photovoltaic assembly.
[0006] According to the photovoltaic module of the first aspect of the utility model, the photovoltaic module includes: a first cover plate; a second cover plate, wherein the second cover plate is arranged on one side of the thickness direction of the first cover plate; a battery cell layer, wherein the battery cell layer is arranged between the first cover plate and the second cover plate; a first packaging film, wherein the first packaging film is arranged between the first cover plate and the battery cell layer; a second packaging film, wherein the second packaging film is arranged between the second cover plate and the battery cell layer, and the outer peripheral edge of the second packaging film is folded toward the side where the first cover plate is located to at least cover the side of the battery cell layer.
[0007] According to the photovoltaic module of the embodiment of the utility model, by folding the outer periphery of the second encapsulation film toward the side where the first cover plate is located to at least cover the side of the battery layer, water vapor outside the photovoltaic module is not easy to enter the photovoltaic module from the side of the photovoltaic module and contact the side of the battery layer, thus avoiding corrosion of the grid line of the battery layer by water vapor, which is beneficial to the normal power generation of the photovoltaic module, increases the power generation, and further improves the performance of the photovoltaic module. In addition, there is no need to add other waterproof structures or waterproof components, which reduces the production cost of the photovoltaic module.
[0008] According to some embodiments of the present invention, the outer periphery of the second packaging film is folded toward the side where the first cover plate is located to cover the side of the battery layer and extend between the first cover plate and the battery layer.
[0009] According to some embodiments of the present invention, the outer periphery of the second packaging film extends to between the first cover plate and the first packaging film to cover the outer periphery of the first packaging film.
[0010] According to some embodiments of the present invention, the outer periphery of the first packaging film is located radially inward of the outer periphery of the first cover plate.
[0011] According to some embodiments of the present invention, the minimum distance between the outer periphery of the first packaging film in the length direction and the outer periphery of the first cover plate is d1, wherein d1 satisfies: 5mm≤d1≤15mm.
[0012] According to some embodiments of the present invention, the photovoltaic module further comprises: a sealing member, wherein the sealing member is at least located between the side surface of the cell layer and the second packaging film.
[0013] According to some embodiments of the present invention, the outer periphery of the second packaging film is folded toward the side where the first cover plate is located to cover the side of the battery cell layer and extend between the first packaging film and the battery cell layer.
[0014] According to some embodiments of the present invention, the sealing member wraps around the side surface of the battery layer and covers the edge of the side surface of the battery layer facing the first cover plate.
[0015] According to some embodiments of the present invention, the outer periphery of the second packaging film is folded toward the side where the first cover plate is located to cover the side of the battery layer and extend between the first cover plate and the first packaging film.
[0016] According to some embodiments of the present invention, the sealing member is disposed on a surface of the second packaging film that is away from the second cover plate.
[0017] According to some embodiments of the present invention, the width of the seal is w, wherein w satisfies: 5mm≤w≤15mm.
[0018] According to some embodiments of the present invention, the sealing component is a butyl rubber component.
[0019] According to some embodiments of the present invention, the minimum distance between the outer periphery of the second packaging film and the side surface of the second cover plate is d2, wherein d2 satisfies: 25mm≤d2≤35mm.
[0020] According to some embodiments of the present invention, the first packaging film is an EVA film; and / or the second packaging film is a POE film or an EPE film.
[0021] According to some embodiments of the present invention, the first cover plate is a back cover plate, and the second cover plate is a front cover plate.
[0022] According to some embodiments of the present invention, both the first cover plate and the second cover plate are glass pieces.
[0023] A photovoltaic power generation system according to an embodiment of a second aspect of the utility model comprises the photovoltaic assembly according to the embodiment of the first aspect.
[0024] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0026] Figure 1 is a schematic diagram of a photovoltaic assembly according to an embodiment of the utility model;
[0027] Figure 2 is a diagram of the cooperation between the second cover plate and the second packaging film according to an embodiment of the utility model;
[0028] Figure 3 is a side view of the cooperation between the second cover plate and the second packaging film according to an embodiment of the utility model;
[0029] Figure 4 is a diagram of the cooperation of the second cover plate, the second packaging film and the sealing member according to an embodiment of the utility model;
[0030] Figure 5 is a side view of the cooperation of the second cover plate, the second packaging film and the sealing member according to an embodiment of the utility model;
[0031] Figure 6 is a schematic diagram of a photovoltaic assembly according to another embodiment of the utility model;
[0032] Figure 7 It is a schematic diagram of a photovoltaic assembly according to another embodiment of the utility model.
[0033] Reference numerals:
[0034] 100. Photovoltaic modules;
[0035] 1. First cover plate; 2. Second cover plate; 3. Battery layer;
[0036] 4. First packaging film; 5. Second packaging film; 6. Sealing element. DETAILED DESCRIPTION
[0037] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 7 A photovoltaic assembly 100 according to an embodiment of the first aspect of the present invention is described.
[0038] like Figure 1 As shown, the photovoltaic assembly 100 according to the first embodiment of the utility model includes a first cover plate 1, a second cover plate 2, a battery layer 3, a first packaging film 4 and a second packaging film 5.
[0039] Specifically, the second cover plate 2 is disposed in the thickness direction of the first cover plate 1 (for example, Figure 1 On one side of the upper and lower directions, the battery cell layer 3 is arranged between the first cover plate 1 and the second cover plate 2, the first packaging film 4 is arranged between the first cover plate 1 and the battery cell layer 3, the second packaging film 5 is arranged between the second cover plate 2 and the battery cell layer 3, and the outer peripheral edge of the second packaging film 5 is folded toward the side where the first cover plate 1 is located to at least cover the side of the battery cell layer 3.
[0040] For example, in Figure 1In the example, along the thickness direction of the first cover plate 1, from top to bottom, there are the first cover plate 1, the first encapsulation film 4, the battery layer 3, the second encapsulation film 5, and the second cover plate 2. The first encapsulation film 4 is used to bond the upper surface of the first cover plate 1 and the battery layer 3, and the second encapsulation film 5 is used to bond the lower surface of the battery layer 3 and the second cover plate 2, so that the photovoltaic module 100 is encapsulated as a whole. For example, the photovoltaic module 100 is a rectangular parallelepiped, and the edges of the second encapsulation film 5 protrude from the sides of the battery layer 3, and the second encapsulation film 5 is folded upward to cover the sides of the battery layer 3. With such a configuration, the outer periphery of the second encapsulation film 5 can isolate the side of the cell layer 3 from the outside of the photovoltaic module 100, so that water vapor outside the photovoltaic module 100 is not easy to contact the side of the cell layer 3, and is not easy to enter the photovoltaic module 100 from the side of the photovoltaic module 100, thereby avoiding corrosion of the grid line (not shown) of the cell layer 3 by water vapor, which is beneficial to the normal power generation of the photovoltaic module 100, improves the power generation, and further improves the performance of the photovoltaic module 100. In addition, the structure of the second encapsulation film 5 is simple, which is beneficial to the production of the photovoltaic module 100. In addition, there is no need to add other waterproof structures or waterproof components, which reduces the production cost of the photovoltaic module 100.
[0041] According to the photovoltaic module 100 of the embodiment of the utility model, by setting the outer periphery of the second encapsulation film 5 to be folded toward the side where the first cover plate 1 is located to at least cover the side of the battery layer 3, the water vapor outside the photovoltaic module 100 is not easy to enter the photovoltaic module 100 from the side of the photovoltaic module 100 and contact the side of the battery layer 3, thereby avoiding the corrosion of the grid line of the battery layer 3 by water vapor, which is beneficial to the normal power generation of the photovoltaic module 100, improves the power generation, and further improves the performance of the photovoltaic module 100. In addition, there is no need to add other waterproof structures or waterproof components, which reduces the production cost of the photovoltaic module 100.
[0042] According to some embodiments of the present invention, the outer periphery of the second packaging film 5 is folded toward the side where the first cover plate 1 is located to cover the side of the battery cell layer 3 and extend between the first cover plate 1 and the battery cell layer 3. The second packaging film 5 is provided in the following two cases: first, combined with Figure 6 The outer edge of the second packaging film 5 is folded upward to wrap the side of the battery layer 3 and extend between the battery layer 3 and the first packaging film 4. Figure 1The outer periphery of the second encapsulation film 5 is folded upward to wrap the side of the battery cell layer 3 and extend between the first encapsulation film 4 and the first cover plate 1. In this way, the gap between the outer periphery of the second encapsulation film 5 and the first cover plate 1 is reduced, and the seal between the outer periphery of the second encapsulation film 5 and the first cover plate 1 is increased. It is more difficult for water vapor outside the photovoltaic module 100 to pass through the second encapsulation film 5 and contact the battery cell layer 3, further reducing the probability of water vapor corroding the battery cell layer 3 and extending the service life of the battery cell layer 3, thereby further improving the performance of the photovoltaic module 100 and extending the service life of the photovoltaic module 100.
[0043] According to some embodiments of the present invention, the outer periphery of the second packaging film 5 extends between the first cover plate 1 and the first packaging film 4 to cover the outer periphery of the first packaging film 4. Figure 1 In the example, the edges of the second encapsulation film 5 are folded upward and extend between the first cover plate 1 and the first encapsulation film 4. In this way, the second encapsulation film 5 and the first encapsulation film 4 can wrap the battery layer 3 together, and the sides of the battery layer 3 are separated from the outside of the photovoltaic module 100, effectively blocking the infiltration of water vapor and ensuring the normal power generation of the photovoltaic module 100. In addition, the second encapsulation film 5 is firmly connected to the first encapsulation film 4, which improves the reliability of the use of the photovoltaic module 100. In addition, the outer peripheral edge of the second encapsulation film 5 extends between the first cover plate 1 and the first encapsulation film 4, increasing the thickness of the edge of the photovoltaic module 100. When the photovoltaic module 100 is laminated, the battery cells close to the edge are not easy to crack or break, thereby improving the qualified rate of the finished product of the photovoltaic module 100. Moreover, the risk of outdoor aging of the photovoltaic module 100 can be reduced, and the service life of the photovoltaic module 100 can be extended.
[0044] According to some embodiments of the present invention, referring to Figure 1 , the outer periphery of the first encapsulation film 4 is located radially inward of the outer periphery of the first cover plate 1. That is to say, there is a gap between the outer periphery of the first encapsulation film 4 and the outer periphery of the first cover plate 1, and the cross-sectional area of the first encapsulation film 4 is smaller than the cross-sectional area of the first cover plate 1. Such a configuration is conducive to the second encapsulation film 5 being folded upward to wrap the first encapsulation film 4, reducing the interference of the first encapsulation film 4 on the second encapsulation film 5, so as to facilitate the assembly of the photovoltaic module 100. Moreover, the edge of the photovoltaic module 100 after integral molding is also relatively flat, and the appearance of the photovoltaic module 100 is more beautiful.
[0045] Optionally, the minimum distance between the outer periphery of the first packaging film 4 in the length direction and the outer periphery of the first cover plate 1 is d1, wherein d1 satisfies: 5mm≤d1≤15mm. For example, the first packaging film 4 is in a rectangular shape, and the minimum distance between the long side edge of the first packaging film 4 and the long side edge of the first cover plate 1 is d1. When the minimum distance between the outer periphery of the first packaging film 4 in the length direction and the outer periphery of the first cover plate 1 is less than 5mm, the distance between the outer periphery of the first packaging film 4 in the length direction and the outer periphery of the first cover plate 1 in the length direction is small, and the edge of the second packaging film 5 after being folded upward is not easy to extend between the first packaging film 4 and the first cover plate 1. When the minimum distance between the outer periphery of the first packaging film 4 in the length direction and the outer periphery of the first cover plate 1 is greater than 15 mm, the distance between the outer periphery of the first packaging film 4 in the length direction and the outer periphery of the first cover plate 1 in the length direction is large, and a larger amount of the second packaging film 5 is required to extend the outer periphery of the second packaging film 5 to between the first packaging film 4 and the first cover plate 1, and the thickness of the edge of the photovoltaic module 100 will be reduced, thereby increasing the damage rate of the photovoltaic module 100 during pressure.
[0046] Therefore, by setting the minimum distance d1 between the outer periphery of the first packaging film 4 in the length direction and the outer periphery of the first cover plate 1 to satisfy: 5mm≤d1≤15mm, the distance between the outer periphery of the first packaging film 4 in the length direction and the outer periphery of the first cover plate 1 in the length direction is moderate, which is beneficial for the outer periphery of the second packaging film 5 to extend between the first packaging film 4 and the first cover plate 1, thereby facilitating the assembly of the photovoltaic module 100.
[0047] According to some optional embodiments of the utility model, the minimum distance between the outer periphery of the first encapsulation film 4 in the width direction and the outer periphery of the first cover plate 1 is d, where d satisfies: 0mm≤d≤15mm. For example, when the minimum distance between the outer periphery of the first encapsulation film 4 in the width direction and the outer periphery of the first cover plate 1 is greater than 15mm, the distance between the outer periphery of the first encapsulation film 4 in the width direction and the outer periphery of the first cover plate 1 in the width direction is large, and a larger amount of the second encapsulation film 5 is required to extend the outer periphery of the second encapsulation film 5 between the first encapsulation film 4 and the first cover plate 1, and the thickness of the edge of the photovoltaic module 100 will be reduced, thereby increasing the damage rate of the photovoltaic module 100 during the pressure-bearing process. Therefore, by setting the minimum distance d between the outer edge of the first packaging film 4 in the width direction and the outer edge of the first cover plate 1 to satisfy 0mm≤d≤15mm, the distance between the outer edge of the first packaging film 4 in the width direction and the outer edge of the first cover plate 1 in the width direction is moderate, which is beneficial for the outer edge of the second packaging film 5 to extend between the first packaging film 4 and the first cover plate 1, thereby facilitating the assembly of the photovoltaic module 100.
[0048] Furthermore, combined with Figure 4-Figure 7 The photovoltaic module 100 includes a seal 6, and the seal 6 is at least located between the side of the battery layer 3 and the second packaging film 5. For example, the seal 6 is located on the outer peripheral side of the battery layer 3, and the seal 6 extends along the circumference of the battery layer 3. In this way, the seal 6 can effectively block the movement of water vapor passing through the second packaging film 5 to the side of the battery layer 3, so that the seal 6 and the second packaging film 5 can form two waterproof layers to block water vapor from penetrating into the side of the battery layer 3, further reducing the probability of water vapor penetrating into the side of the battery layer 3, improving the waterproof performance of the side of the photovoltaic module 100, facilitating the normal use of the battery layer 3, and improving the power generation of the photovoltaic module 100, thereby further improving the performance of the photovoltaic module 100.
[0049] According to some embodiments of the present invention, Figure 6 , the outer periphery of the second encapsulation film 5 is folded toward the side where the first cover plate 1 is located to cover the side of the battery cell layer 3 and extend between the first encapsulation film 4 and the battery cell layer 3. For example, in the example of FIG. 6, the first encapsulation film 4 is located above the outer periphery of the second encapsulation film 5. During the assembly process of the photovoltaic module 100, after the outer periphery of the second encapsulation film 5 is folded and the edge of the upper surface of the battery cell layer 3 is wrapped, the first encapsulation film 4 is covered on the upper surface of the battery cell layer 3. As a result, the contact area between the outer periphery of the second encapsulation film 5 and the upper surface of the battery cell layer 3 is increased, so that the second encapsulation film 5 can not only prevent water vapor from penetrating into the side of the battery cell layer 3, but also effectively prevent water vapor from penetrating from between the second encapsulation film 5 and the first cover plate 1 to the upper side of the battery cell layer 3, thereby further improving the waterproof performance of the side of the photovoltaic module 100 and further reducing the corrosion of the grid line of the battery cell layer 3 by water vapor.
[0050] According to some embodiments of the present invention, referring to Figure 6 The seal 6 covers the side of the battery layer 3 and the edge of the side surface of the battery layer 3 facing the first cover plate 1. For example, the seal 6 can cover the sides of the battery layer 3 and extend to the edge of the upper surface of the battery layer 3. In this way, the contact area between the seal 6 and the battery layer 3 is increased, and the seal 6 can block the contact between water vapor and the battery from the sides of the battery layer 3 and the top of the battery layer 3, thereby further reducing the probability of water vapor penetrating to the side of the battery, which is more conducive to the normal power generation of the photovoltaic module 100.
[0051] According to some embodiments of the present invention, the outer edge of the second packaging film 5 is folded toward the side where the first cover plate 1 is located to cover the side of the battery layer 3 and extend between the first cover plate 1 and the first packaging film 4. Figure 7 In the example, the outer periphery of the second encapsulation film 5 covers the side of the battery cell layer 3, the side of the first encapsulation film 4 and the edge of the upper surface of the first encapsulation film 4, at least a part or all of the seal 6 is located between the side of the battery cell layer 3 and the second encapsulation film 5, and another part of the seal 6 can extend between the side of the first encapsulation film 4 and the second encapsulation film 5, or another part of the seal 6 extends between the first encapsulation film 4 and the first cover plate 1. In this way, the seal 6 and the second encapsulation film 5 are coated on the side of the battery cell layer 3, and the second encapsulation film 5 covers the seal 6 to effectively avoid the overflow of the seal 6, that is, the probability of the seal 6 being squeezed out from between the second encapsulation film 5 and the second cover plate 2 is reduced, and the sealing and waterproof effect of the seal 6 is further ensured.
[0052] According to some embodiments of the present invention, Figure 5 , the sealing member 6 is arranged on the side surface of the second packaging film 5 away from the second cover plate 2. For example, the sealing member 6 is arranged on the upper surface of the second packaging film 5. Thus, the positions of the sealing member 6 and the second packaging film 5 are reasonably arranged, and the second packaging film 5 can wrap the sealing member 6 after being folded, so that the sealing member 6 can not only play a role of sealing and waterproofing, but also the second packaging film 5 can prevent the sealing member 6 from overflowing, so as to facilitate the long-term use of the sealing member 6.
[0053] According to some embodiments of the utility model, the width of the seal 6 is w, wherein w satisfies: 5mm≤w≤15mm. For example, when the width of the seal 6 is less than 5mm, the width of the seal 6 is narrow, and the sealing and waterproof performance of the seal 6 is poor. When the width of the seal 6 is greater than 15mm, the usage of the seal 6 is large, which increases the use cost of the seal 6. Therefore, by setting the width w of the seal 6 to satisfy 5mm≤w≤15mm, the width of the seal 6 is reasonably set, so that the seal 6 has better sealing and waterproof performance, and the use cost of the seal 6 can also be reduced, thereby saving the production cost of the photovoltaic module 100.
[0054] Optionally, the seal 6 is a butyl rubber member. In this configuration, the butyl rubber member has good air tightness, and the butyl rubber has the properties of heat resistance, aging resistance and chemical resistance, thereby improving the seal 6 to prevent water vapor from invading, and improving the photoelectric conversion capability of the photovoltaic module 100. Moreover, the butyl rubber member has a wide source of materials and is easy to purchase. For example, the seal 6 can be formed by applying butyl rubber to the edge of the second packaging film 5.
[0055] According to some embodiments of the present invention, Figure 2, the minimum distance between the outer edge of the second encapsulation film 5 and the side of the second cover plate 2 is d2, where d2 satisfies: 25mm≤d2≤35mm. For example, when the minimum distance between the outer edge of the second encapsulation film 5 and the side of the second cover plate 2 is less than 25mm, the length or width of the second encapsulation film 5 is shorter, and the second encapsulation film 5 is not easy to cover the side of the battery cell layer 3 after being folded, so that water vapor easily flows from the edge of the second encapsulation film 5 and the first cover plate 1 to the side of the battery cell layer 3. When the minimum distance between the outer edge of the second encapsulation film 5 and the side of the second cover plate 2 is greater than 35mm, the length or width of the second encapsulation film 5 is larger, which increases the amount of the second encapsulation film 5 and increases the production cost of the photovoltaic module 100. Therefore, by setting the minimum distance d2 between the outer edge of the second packaging film 5 and the side of the second cover plate 2 to satisfy: 25mm≤d2≤35mm, the size of the second packaging film 5 is reasonably set, which is beneficial to the use of the second packaging film 5 and can save the usage of the second packaging film 5, thereby saving the production cost of the photovoltaic module 100.
[0056] According to some embodiments of the utility model, the first encapsulation film 4 is an EVA film. And / or, the second encapsulation film 5 is a POE film or an EPE film. The above-mentioned configurations of the first encapsulation film 4 and the second encapsulation film 5 may include the following situations: First, the first encapsulation film 4 is configured as an EVA film, and the second encapsulation film 5 is not specifically limited. Second, the second encapsulation film 5 is configured as a POE film or an EPE film, and the first encapsulation film 4 is not specifically limited. Third, the first encapsulation film 4 is configured as an EVA film, and the second encapsulation film 5 is configured as a POE film or an EPE film. In this configuration, the EVA (Polyethylene vinylacetate, short for polyethylene-polyvinyl acetate copolymer) film is a thermosetting and sticky film, and the EVA film has advantages in adhesion, durability, optical properties, etc., so as to facilitate the bonding of the first cover plate 1 and the battery layer 3. Moreover, the cost of the EVA film is relatively low, which can reduce the production cost of the photovoltaic module 100. In addition, the POE film and the EPE film have low water permeability, which can well isolate water vapor, so as to facilitate the normal use of the battery layer 3. Moreover, the POE film also has strong corrosion resistance and anti-aging performance, thereby extending the service life of the second packaging film 5.
[0057] According to some embodiments of the utility model, the first cover plate 1 is the back cover plate, and the second cover plate 2 is the front cover plate. When the photovoltaic module 100 is assembled, the second cover plate 2 is placed first, and then the second packaging film 5, the battery layer 3, the first packaging film 4 and the first cover plate 1 are stacked on the second cover plate 2 in sequence. During the assembly process of the photovoltaic module 100, the second packaging film 5 can be folded upward according to the production requirements to isolate water vapor. Therefore, the setting of the second packaging film 5 matches the production process of the photovoltaic module 100, and does not increase the processing difficulty and process flow of the photovoltaic module 100. It is also possible to reduce the lamination preparation process of the photovoltaic module 100, and the process of placing small strips during the original process can be cancelled.
[0058] Optionally, both the first cover plate 1 and the second cover plate 2 are glass pieces. In this way, the glass pieces have a certain rigidity, so that the protective effect of the first cover plate 1 and the second cover plate 2 on the cell layer 3 can be improved, so as to facilitate the long-term and stable use of the photovoltaic module 100. Moreover, it is also beneficial to the photoelectric conversion of the photovoltaic module 100, so as to facilitate the normal use of the photovoltaic module 100.
[0059] A photovoltaic power generation system according to an embodiment of a second aspect of the utility model includes a photovoltaic assembly 100 according to the embodiment of the first aspect.
[0060] According to a photovoltaic power generation system of an embodiment of the utility model, by adopting the above-mentioned photovoltaic assembly 100, the service life of the photovoltaic power generation system is extended and the performance of the photovoltaic power generation system is improved.
[0061] Other structures and operations of the photovoltaic power generation system according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.
[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.
[0064] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate 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 claims and their equivalents.
Claims
1. A photovoltaic module, characterized in that: include: first cover plate; a second cover plate, the second cover plate being arranged on one side of the first cover plate in a thickness direction; A battery layer, wherein the battery layer is disposed between the first cover plate and the second cover plate; A first packaging film, wherein the first packaging film is disposed between the first cover plate and the battery layer; A second packaging film is provided between the second cover plate and the battery cell layer, and an outer peripheral edge of the second packaging film is folded toward the side where the first cover plate is located to at least cover a side surface of the battery cell layer.
2. The photovoltaic module according to claim 1, characterized in that: The outer periphery of the second packaging film is folded toward the side where the first cover plate is located to cover the side surface of the battery layer and extend to between the first cover plate and the battery layer.
3. The photovoltaic module according to claim 2, characterized in that: The outer periphery of the second packaging film extends to between the first cover plate and the first packaging film to cover the outer periphery of the first packaging film.
4. The photovoltaic module according to claim 3, characterized in that: The outer periphery of the first packaging film is located radially inward of the outer periphery of the first cover plate.
5. The photovoltaic module according to claim 4, characterized in that: The minimum distance between the outer periphery of the first packaging film in the length direction and the outer periphery of the first cover plate is d1, wherein d1 satisfies: 5mm≤d1≤15mm.
6. The photovoltaic module according to claim 1, characterized in that: Further including: A sealing member, wherein the sealing member is at least located between the side surface of the battery layer and the second packaging film.
7. The photovoltaic module according to claim 6, characterized in that: The outer periphery of the second packaging film is folded toward the side where the first cover plate is located to cover the side surface of the battery cell layer and extend between the first packaging film and the battery cell layer.
8. The photovoltaic module according to claim 7, characterized in that: The sealing member wraps around the side surface of the battery layer and covers the edge of a surface of one side of the battery layer facing the first cover plate.
9. The photovoltaic module according to claim 6, characterized in that: The outer periphery of the second packaging film is folded toward the side where the first cover plate is located to cover the side surface of the battery layer and extend to between the first cover plate and the first packaging film.
10. The photovoltaic module according to claim 6, characterized in that: The sealing member is arranged on a surface of the second packaging film on a side away from the second cover plate.
11. The photovoltaic module according to claim 6, characterized in that: The width of the seal is w, wherein w satisfies: 5mm≤w≤15mm.
12. The photovoltaic module according to claim 6, characterized in that: The sealing element is a butyl rubber element.
13. The photovoltaic module according to claim 1, characterized in that: The minimum distance between the outer periphery of the second packaging film and the side surface of the second cover plate is d2, wherein d2 satisfies: 25 mm≤d2≤35 mm.
14. The photovoltaic module according to claim 1, characterized in that: The first packaging film is an EVA film; and / or The second packaging film is a POE film or an EPE film.
15. The photovoltaic module according to claim 1, characterized in that: The first cover plate is a back cover plate, and the second cover plate is a front cover plate.
16. The photovoltaic module according to any one of claims 1 to 15, characterized in that: The first cover plate and the second cover plate are both glass members.
17. A photovoltaic power generation system, characterized in that: Comprising a photovoltaic module according to any one of claims 1-16.