Photovoltaic array assembly longitudinal expansion joint device and photovoltaic power station

Abstract

The utility model discloses a kind of photovoltaic large array component longitudinal expansion joint device and photovoltaic power station, wherein longitudinal expansion joint device is located at the gap between two transverse adjacent rows of photovoltaic components, the longitudinal expansion joint device includes fixed part fixed to the frame B side of the gap two sides photovoltaic component and flexible expansion belt between two sides fixed part, the fixed part is provided with the slot extending along longitudinal direction, the lateral two sides of the flexible expansion belt are provided with insertion part, and the insertion part of the two sides of flexible expansion belt is inserted with the slot of two sides fixed part correspondingly.The fixed part provides the space of the installation of flexible expansion belt with fixable, flexible expansion belt can be made of material with enough expansion, waterproof and durability, to eliminate the deformation between components due to temperature stress, therefore, temperature stress of thermal expansion and cold contraction can be released by the above-mentioned flexible expansion belt, thereby prolonging the service life of photovoltaic component.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic technology. Background Technology

[0002] Expansion joints ensure the structural integrity and stability of photovoltaic systems under various environmental conditions. In extreme weather conditions, such as high temperatures, low temperatures, and strong winds, expansion joints effectively alleviate stress caused by changes in material concentration, preventing damage to the modules due to temperature stress deformation. Furthermore, a well-designed expansion joint system can extend the lifespan of photovoltaic modules and improve the efficiency of the photovoltaic power generation system.

[0003] In practical applications, the design of expansion joints for photovoltaic modules needs to be adjusted according to specific circumstances. For example, in regions with significant climate change, wider expansion joints are required to accommodate greater structural deformation. Simultaneously, the sealing and waterproofing of the expansion joints are also crucial design considerations to prevent rainwater and moisture from damaging the internal structure of the modules.

[0004] In summary, the design of expansion joints in photovoltaic modules is a crucial aspect of ensuring structural stability and improving photovoltaic power generation efficiency. Through proper design and application, photovoltaic modules can not only provide shade for vehicles but also serve as a sustainable clean energy solution, contributing to future green mobility and energy transition.

[0005] As module sizes increase, the temperature stress caused by quality issues, extreme temperature changes, environmental changes, and abnormal stress distribution in tempered glass also increases. Furthermore, modules heat up during power generation, and factors such as quality defects in the production process, uneven temperature tempering, and extreme weather can all lead to stress imbalances that can cause the tempered glass in the modules to spontaneously shatter.

[0006] The existing longitudinal expansion joint device design involves filling the gap between two adjacent rows of photovoltaic modules with sealing strips. However, after long-term use, the sealing strips are prone to connection failure. Utility Model Content

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a longitudinal expansion joint device for photovoltaic large array modules and a photovoltaic power station. This device solves the problem of easy connection failure of longitudinal expansion joint devices, eliminates the deformation between modules caused by temperature stress, releases the temperature stress generated by thermal expansion and contraction, and thus extends the service life of the modules.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A longitudinal expansion joint device for a large photovoltaic array module is provided at the gap between two adjacent rows of photovoltaic modules in the horizontal direction. The longitudinal expansion joint device includes a fixing member fixed to the B side of the photovoltaic module frame on both sides of the gap and a flexible expansion strip provided between the two fixing members. The fixing member is provided with a slot extending in the longitudinal direction. The flexible expansion strip is provided with an insertion part on both sides in the horizontal direction, and the insertion part on both sides of the flexible expansion strip is inserted into the slot of the two fixing members.

[0010] Preferably, the flexible stretchable belt has a stretchable deformation structure in the middle.

[0011] Preferably, the telescopic deformation structure includes a V-shaped portion disposed in the middle of the flexible telescopic belt.

[0012] Preferably, the thickness of the flexible stretchable strip is thinner in the middle and thicker on both sides.

[0013] Preferably, the slot is a T-shaped slot, and the mating part is a T-shaped structure.

[0014] Preferably, the upper opening of the T-slot protrudes and has an movable gap between it and the flexible telescopic belt.

[0015] Preferably, structural adhesive is provided between the fastener and side B of the frame.

[0016] Preferably, the fastener is an aluminum alloy profile; and / or, the flexible stretch band is made of rubber.

[0017] Preferably, the flexible stretch band is made of EPDM rubber.

[0018] In addition, a photovoltaic power station is also provided, including the aforementioned longitudinal expansion joint device.

[0019] The present invention adopts the above technical solution and has the following beneficial effects:

[0020] 1. The longitudinal expansion joint device is located at the gap between two adjacent rows of photovoltaic modules in the transverse direction. The longitudinal expansion joint device includes fixing members fixed to the B-side of the photovoltaic module frame on both sides of the gap and a flexible expansion strip located between the fixing members on both sides. The fixing members provide a fixed space for the installation of the flexible expansion strip. The flexible expansion strip can be made of materials with sufficient elasticity, waterproofness, and durability to eliminate the deformation between modules caused by temperature stress. Therefore, the temperature stress caused by thermal expansion and contraction can be released through the aforementioned flexible expansion strip, thereby extending the service life of the photovoltaic modules.

[0021] In addition, the insertion parts on both sides of the flexible telescopic belt correspond to the slots of the fasteners on both sides, which facilitates the connection between the flexible telescopic belt and the fasteners. On the other hand, the insertion parts on both sides of the flexible telescopic belt can cooperate with the slots of the fasteners on both sides through elastic deformation, which is not only waterproof, but also prevents the connection from failing even if thermal expansion and contraction occurs between the two parts because the insertion parts can generate elastic deformation.

[0022] 2. Because the flexible telescopic belt has a telescopic deformation structure in the middle, for example, the telescopic deformation structure includes a V-shaped portion in the middle of the flexible telescopic belt, the flexible telescopic belt has a large deformation within the small gap between two adjacent rows of photovoltaic modules in the lateral direction, ensuring sufficient telescopicity.

[0023] 3. The flexible stretch band is thinner in the middle and thicker on both sides. This, combined with the V-shaped section in the middle of the flexible stretch band, makes it more conducive to deformation in the middle part.

[0024] 4. The slot is a T-shaped slot, and the mating part is a T-shaped structure. Therefore, a lateral limiting structure is formed between the mating part and the slot. In this way, even if the flexible telescopic band undergoes large deformation, the connection will not fail due to the lateral limiting effect between the mating part and the slot.

[0025] 5. The upper opening of the T-slot protrudes and has a movable gap between it and the flexible telescopic belt. This movable gap ensures that the flexible telescopic belt can withstand deformation in the middle section.

[0026] 6. The fastener is made of aluminum alloy profile. If the coefficients of thermal expansion (CTE) of the two materials differ too much, stress will be generated during temperature changes, leading to deformation, cracking, or connection failure. Typically, photovoltaic module frames are also made of aluminum alloy, thus avoiding connection failure of the longitudinal expansion joint device caused by a large difference in the coefficients of thermal expansion (CTE) between the fastener and the photovoltaic module frame.

[0027] 7. Structural adhesive is provided between the fastener and side B of the frame. The high-performance structural adhesive has sufficient bonding strength to ensure that the expansion joint is firmly bonded to the component frame.

[0028] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0029] The utility model will be further described below with reference to the accompanying drawings:

[0030] Figure 1 This is a schematic diagram illustrating the application of the longitudinal expansion joint device of this utility model;

[0031] Figure 2 This is a schematic diagram illustrating the application of the longitudinal expansion joint device of this utility model;

[0032] Figure 3 for Figure 2 Enlarged view of the longitudinal expansion joint device;

[0033] Reference numerals: longitudinal expansion joint device 1, fastener 11, slot 111, upper groove 112, movable gap 113, flexible expansion band 12, V-shaped part 121, insertion part 122, structural adhesive 13, photovoltaic module 2. Detailed Implementation

[0034] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0035] Those skilled in the art will understand that, without conflict, the features in the following embodiments and implementations can be combined with each other.

[0036] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "lateral," and "longitudinal," which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0039] like Figures 1 to 3As shown, this embodiment provides a longitudinal expansion joint device 1 for a large photovoltaic array module, applied in a photovoltaic power station. The photovoltaic modules 2 are arranged in a rectangular array with a large area, thus placing high demands on the design of the expansion joint. The longitudinal expansion joint device 1 is located at the gap between two adjacent rows of photovoltaic modules 2 in the horizontal direction. The device includes fixing members 11 fixed to the B-side frame of the photovoltaic modules on both sides of the gap, and a flexible expansion band 12 located between the fixing members 11 on both sides. The fixing members 11 have slots 111 extending longitudinally, and the flexible expansion band 12 has insertion portions 122 on both sides in the horizontal direction, which engage with the slots 111 of the fixing members on both sides.

[0040] The longitudinal expansion joint device is located in the gap between two adjacent rows of photovoltaic modules in the transverse direction and has waterproof performance; the fastener provides a space for fixing the flexible expansion strip. The flexible expansion strip can be made of materials with sufficient elasticity, waterproofness and durability to eliminate the deformation between the modules caused by temperature stress. Therefore, the temperature stress caused by thermal expansion and contraction can be released through the above-mentioned flexible expansion strip, thereby extending the service life of the photovoltaic module.

[0041] In addition, the insertion parts on both sides of the flexible telescopic belt correspond to the slots of the fasteners on both sides, which facilitates the connection between the flexible telescopic belt and the fasteners. On the other hand, the insertion parts on both sides of the flexible telescopic belt can cooperate with the slots of the fasteners on both sides through elastic deformation, which is not only waterproof, but also prevents the connection from failing even if thermal expansion and contraction occurs between the two parts because the insertion parts can generate elastic deformation.

[0042] In this embodiment, the flexible stretch band 12 is made of rubber, preferably EPDM rubber. Firstly, EPDM rubber has excellent weather resistance, resisting the effects of sunlight, ozone, oxygen, and other environmental factors, and is not prone to aging even after prolonged outdoor exposure. Secondly, EPDM rubber has excellent heat and cold resistance. Its operating temperature range is typically between -50℃ and +150℃, making it suitable for various extreme climatic conditions and maintaining its performance in high or low temperature environments. Furthermore, EPDM rubber also has excellent elasticity and flexibility, with good elongation and recovery, ensuring sufficient stretchability.

[0043] In some embodiments, the flexible telescopic belt 12 has a telescopic deformation structure in the middle. Specifically, the telescopic deformation structure includes a V-shaped portion 121 located in the middle of the flexible telescopic belt. Therefore, the flexible telescopic belt has a large deformation within a small gap between two adjacent rows of photovoltaic modules in the lateral direction, ensuring sufficient telescopic flexibility.

[0044] Furthermore, the flexible stretch band 12 has a thickness that is thinner in the middle and thicker on both sides. This, combined with the V-shaped section in the middle of the flexible stretch band, makes it more conducive to deformation in the middle part.

[0045] In this embodiment, the fastener 11 is an aluminum alloy profile. If the coefficients of thermal expansion (CTE) of the two materials differ too much, stress will be generated when the temperature changes, leading to deformation, cracking, or connection failure. Typically, photovoltaic module frames are also made of aluminum alloy, thus avoiding connection failure of the longitudinal expansion joint device caused by a large difference in the coefficients of thermal expansion (CTE) between the fastener and the photovoltaic module frame.

[0046] Structural adhesive 13 is provided between the fastener 11 and the frame B side. The high-performance structural adhesive has sufficient bonding strength to ensure that the expansion joint is firmly bonded to the component frame.

[0047] In some embodiments, the slot 111 is a T-slot, and the mating part 122 is a T-shaped structure. Therefore, a lateral limiting structure is formed between the mating part and the slot, so that even if the flexible telescopic band undergoes significant deformation, the connection will not fail due to the lateral limiting effect between the mating part and the slot.

[0048] Furthermore, the upper opening 112 of the T-slot protrudes and has a movable gap 113 between it and the flexible telescopic belt. This movable gap ensures that the deformation occurs when the middle part of the flexible telescopic belt deforms.

[0049] The flexible expansion joint device 11 with flexible expansion band 12 plays a role in deformation and stress release. Therefore, the width design of flexible expansion band 12 determines the parameters of longitudinal expansion joint device 1. Figure 3 As shown, according to Chapter 9 of the "Code for Design of Building Structures", the effects of temperature should take into account factors such as air temperature changes, solar radiation, and the use of heat sources. The width of the flexible expansion joint 12 is calculated using the following formula:

[0050] ΔT=α T *ΔT K *L

[0051] Where: α T The coefficient of linear expansion of the material

[0052] ΔT K Standard value for uniform temperature action

[0053] The above description is merely a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the utility model will be included within the scope of the claims.

Claims

1. A photovoltaic array assembly longitudinal expansion joint device, disposed at a gap between two laterally adjacent rows of photovoltaic modules, characterized by, The longitudinal expansion joint device includes a fixing member fixed to the B side of the photovoltaic module frame on both sides of the gap and a flexible expansion band disposed between the two fixing members. The fixing member is provided with a slot extending longitudinally, and the flexible expansion band is provided with an insertion part on both sides in the lateral direction, and the insertion part on both sides of the flexible expansion band is inserted into the slot of the two fixing members.

2. A longitudinal expansion joint for a photovoltaic array assembly according to claim 1, wherein, The flexible telescopic belt has a telescopic deformation structure in the middle.

3. A longitudinal expansion joint for a photovoltaic array assembly according to claim 2, wherein, The telescopic deformation structure includes a V-shaped section located in the middle of the flexible telescopic belt.

4. A longitudinal expansion joint for a photovoltaic array assembly according to claim 2, wherein, The thickness of the flexible stretchable belt is thinner in the middle and thicker on both sides.

5. A longitudinal expansion joint for a photovoltaic array assembly according to claim 1, wherein, The slot is a T-shaped slot, and the mating part is a T-shaped structure.

6. A longitudinal expansion joint for a photovoltaic array assembly according to claim 5, wherein, The upper opening of the T-slot protrudes and has an movable gap between it and the flexible telescopic belt.

7. A longitudinal expansion joint for a photovoltaic array assembly according to claim 1, wherein, Structural adhesive is provided between the fastener and side B of the frame.

8. A longitudinal expansion joint for a photovoltaic array assembly according to claim 1, wherein, The fastener is made of aluminum alloy profile; and / or the flexible stretch band is made of rubber.

9. A longitudinal expansion joint for a photovoltaic array assembly according to claim 1, wherein, The flexible stretch band is made of EPDM rubber.

10. A photovoltaic power plant, characterized in that, Includes the longitudinal expansion joint device as described in any one of claims 1 to 9.

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