Photovoltaic device
By designing the curved surface and buffer pad of the junction box, the problem of small contact area between the junction box and the bracket is solved, the stability of the photovoltaic module and the load capacity of the bracket are improved, and the risk of damage to the photovoltaic module is reduced.
Patent Information
- Application Number
- CN202420781857.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-04-16
AI Technical Summary
The contact area between the junction box and the bracket of the existing photovoltaic module is small, resulting in an increase in local stress, increasing the risk of damage to the photovoltaic module and unable to improve the load capacity of the bracket.
A photovoltaic device is designed in which the second surface of the junction box is bent away from the bracket, increasing the contact area with the bracket, and optionally a buffer pad is provided between the junction box and bracket to reduce local stress and increase the load capacity of the bracket.
Effectively reduce the local stress of the junction box and photovoltaic module, avoid damage to the photovoltaic module, improve the load capacity of the bracket, and enhance the stability and durability of the photovoltaic device.
Smart Images
Figure CN223157036U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of solar power generation, and more particularly to a photovoltaic device. Background Art
[0002] The installation of the bracket and the photovoltaic module is to install the photovoltaic module on the bracket, that is, the bracket is located on the back of the photovoltaic module. When a force is applied to the front, the junction box located in the middle of the back of the photovoltaic module will contact the bracket. The bracket is usually a horizontally circular tube, the contact surface of the circular tube is arc-shaped, and the contact surface of the junction box is flat. The contact area is not in the maximum state, which will increase the local stress between the junction box and the photovoltaic module, increase the risk of damage to the photovoltaic module, and cannot improve the load capacity of the bracket.
[0003] Content of the Application
[0004] In view of this, this application provides a photovoltaic device, which effectively reduces the local stress between the junction box and the photovoltaic module and improves the load capacity of the bracket.
[0005] This application provides a photovoltaic device, including: a photovoltaic module, the photovoltaic module having a front surface and a back surface; a bracket, the bracket being cylindrical, the back surface of the photovoltaic module being fixed to the bracket; a junction box, the junction box being located between the photovoltaic module and the bracket, the junction box including a first surface and a second surface arranged oppositely, the first surface of the junction box being fixed to the back surface of the photovoltaic module, the second surface of the junction box being located on the side of the junction box close to the bracket, and the second surface of the junction box being curved in a direction away from the bracket.
[0006] Optionally, the second surface of the junction box is arc-shaped.
[0007] Optionally, the radius of curvature of the second surface of the junction box is the same as the radius of the bracket.
[0008] Optionally, the photovoltaic device further includes a buffer pad, the buffer pad being located between the junction box and the bracket, the buffer pad being fixed to the second surface of the junction box; the material of the buffer pad is an elastic material.
[0009] Optionally, the buffer pad includes a third surface and a fourth surface arranged oppositely, the third surface of the buffer pad being fixed to the second surface of the junction box, the fourth surface of the buffer pad being located on the side of the buffer pad close to the bracket, the third surface of the buffer pad being the same shape as the second surface of the junction box, and the fourth surface of the buffer pad also being the same shape as the second surface of the junction box.
[0010] Optionally, the vertical projection of the second surface of the junction box on the photovoltaic module coincides with the vertical projection of the buffer pad on the photovoltaic module.
[0011] Optionally, the buffer pad includes a plurality of through holes, and when the photovoltaic module is in a planar state, the through holes penetrate the buffer pad along a direction parallel to the plane where the photovoltaic module is located.
[0012] Optionally, the material of the buffer pad is rubber, silica gel or elastic plastic.
[0013] Optionally, when the photovoltaic module is in a planar state, in the direction perpendicular to the plane where the photovoltaic module is located, the thickness of the junction box is 16.5 - 17.5 mm.
[0014] Optionally, the photovoltaic device further includes a connecting member. The back surface of the photovoltaic module is fixed to the bracket through the connecting member; along the extending direction of the bracket, connecting members are provided at both ends of the bracket, and the junction box is located between the two connecting members.
[0015] Compared with the prior art, a photovoltaic device provided by the present application at least achieves the following beneficial effects:
[0016] In the photovoltaic device provided by the present application, when the photovoltaic module is subjected to a positive load, the photovoltaic module will bend. At this time, the junction box will support between the photovoltaic module and the bracket, that is, the junction box will play a certain supporting role for the photovoltaic module, avoiding excessive deformation of the photovoltaic module and causing damage to the photovoltaic module. At the same time, when the junction box supports between the photovoltaic module and the bracket, the second surface of the junction box will contact the bracket. The bracket is cylindrical, and the second surface of the junction box bends away from the bracket, that is, in the direction perpendicular to the extending direction of the bracket, relative to the two ends of the second surface of the junction box, the middle area of the second surface of the junction box is recessed away from the bracket. Thus, when the second surface of the junction box contacts the bracket, the contact area between the second surface of the junction box and the bracket is effectively increased, thereby effectively reducing the local stress between the junction box and the photovoltaic module and enhancing the load capacity of the bracket.
[0017] Of course, it is not necessary for any product implementing the present application to specifically achieve all the above-mentioned technical effects simultaneously.
[0018] Through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings, other features and advantages of the present application will become clear. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present application and, together with the description, are used to explain the principles of the present application.
[0020] Figure 1 is a schematic structural diagram of a photovoltaic device provided by the present application;
[0021] Figure 2 is Figure 1 a schematic structural diagram of the photovoltaic device in a stressed state;
[0022] Figure 3It is a schematic structural diagram of another photovoltaic device provided by this application;
[0023] Figure 4 is Figure 3 A schematic structural diagram of the photovoltaic device when it is in a stressed state;
[0024] Figure 5 A schematic overall structural diagram of the junction box and cushion pad provided by this application;
[0025] Figure 6 is Figure 1 A front view of the photovoltaic device described. Detailed implementation manners
[0026] Now, various exemplary embodiments of this application will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of this application.
[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on this application or its application or use.
[0028] Technologies, methods, and systems known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and systems should be regarded as part of the specification.
[0029] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.
[0030] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0031] Figure 1 It is a schematic structural diagram of a photovoltaic device provided by this application, Figure 2 is Figure 1 A schematic structural diagram of the photovoltaic device when it is in a stressed state. Refer to Figure 1 and Figure 2 , this embodiment provides a photovoltaic device, including:
[0032] A photovoltaic module 10, the photovoltaic module 10 having a front side 11 and a back side 12;
[0033] A bracket 20, the bracket 20 being cylindrical, and the back side 12 of the photovoltaic module 10 being fixed to the bracket 20;
[0034] The junction box 30 is located between the photovoltaic module 10 and the support 20. The junction box 30 includes a first surface 31 and a second surface 32 which are oppositely arranged. The first surface 31 of the junction box 30 is fixed to the back surface 12 of the photovoltaic module 10. The second surface 32 of the junction box 30 is located on the side of the junction box 30 close to the support 20, and the second surface 32 of the junction box 30 is bent in a direction away from the support 20.
[0035] Specifically, the photovoltaic device includes a photovoltaic module 10, a support 20 and a junction box 30. The photovoltaic module 10 has a front surface 11 and a back surface 12, and the back surface 12 of the photovoltaic module 10 is fixed to the support 20. The photovoltaic module 10 includes a laminate and a frame encapsulating the outer edge of the laminate. The laminate is usually rectangular, and the frame includes two long frames and two short frames. The laminate is laminated by solar cells and a glass layer, and the junction box 30 is fixed to the back surface of the laminate.
[0036] In the natural state, there is a gap between the photovoltaic module 10 and the support 20, and the junction box 30 is located in the gap between the photovoltaic module 10 and the support 20. Specifically, the junction box 30 includes a first surface 31 and a second surface 32 which are oppositely arranged. The first surface 31 of the junction box 30 is fixed to the back surface 12 of the photovoltaic module 10, and the second surface 32 of the junction box 30 is located on the side of the junction box 30 close to the support 20. It should be noted that the "natural state" here is the state maintained when the photovoltaic module 10 is not subjected to additional loads such as wind force and mechanical load.
[0037] When the photovoltaic module 10 is subjected to a positive load, the photovoltaic module 10 will bend. At this time, the junction box 30 will be supported between the photovoltaic module 10 and the support 20, that is, the junction box 30 will play a certain supporting role for the photovoltaic module 10 to prevent the photovoltaic module 10 from being damaged due to excessive deformation.
[0038] When the junction box 30 is supported between the photovoltaic module 10 and the support 20, the second surface 32 of the junction box 30 will come into contact with the support 20. The support 20 is cylindrical, and the second surface 32 of the junction box 30 is bent in a direction away from the support 20, that is, in the direction perpendicular to the extension direction of the support 20, the middle area of the second surface 32 of the junction box 30 is recessed in a direction away from the support 20 relative to the two ends of the second surface 32 of the junction box 30. Thus, when the second surface 32 of the junction box 30 comes into contact with the support 20, the contact area between the second surface 32 of the junction box 30 and the support 20 is effectively increased, thereby effectively reducing the local stress between the junction box 30 and the photovoltaic module 10 and enhancing the load capacity of the support 20.
[0039] Optionally, the bracket 20 can be a tracking bracket. The back surface 12 of the photovoltaic module 10 is fixed to the bracket 20, and the bracket 20 can be driven to rotate to drive the photovoltaic module 10 to swing, so as to facilitate adjusting the tilt angle of the photovoltaic module 10 according to the sun.
[0040] Continue to refer to Figure 1 and Figure 2 , in some alternative embodiments, the second surface 32 of the junction box 30 is arc-shaped.
[0041] Specifically, the second surface 32 of the junction box 30 is arc-shaped, that is, in the direction perpendicular to the extension direction of the bracket 20, from both ends of the second surface 32 of the junction box 30 to the middle area of the second surface 32 of the junction box 30, the thickness of the junction box 30 in the direction perpendicular to the photovoltaic module 10 decreases. Thus, when the second surface 32 of the junction box 30 contacts the bracket 20, the contact area between the second surface 32 of the junction box 30 and the bracket 20 is effectively increased, thereby effectively reducing the local stress between the junction box 30 and the photovoltaic module 10 and enhancing the load-bearing capacity of the bracket 20.
[0042] Continue to refer to Figure 1 and Figure 2 , in some alternative embodiments, the curvature radius of the second surface 32 of the junction box 30 is the same as the radius of the bracket 20.
[0043] Specifically, the second surface 32 of the junction box 30 is arc-shaped and the curvature radius of the second surface 32 of the junction box 30 is the same as the radius of the bracket 20. Thus, when the second surface 32 of the junction box 30 contacts the bracket 20, the second surface 32 of the junction box 30 can be completely in contact with the bracket 20, which is beneficial to further increasing the contact area between the second surface 32 of the junction box 30 and the bracket 20, thereby effectively further reducing the local stress between the junction box 30 and the photovoltaic module 10 and further enhancing the load-bearing capacity of the bracket 20.
[0044] Exemplarily, when the radius of the bracket 20 is 126 mm, the curvature radius of the second surface 32 of the junction box 30 is also set to 126 mm.
[0045] Figure 3 is a schematic structural diagram of another photovoltaic device provided by the present application, Figure 4 is Figure 3 a schematic structural diagram of the photovoltaic device when in a stressed state. Refer to Figure 3 and Figure 4 , in some alternative embodiments, the photovoltaic device further includes a buffer pad 40. The buffer pad 40 is located between the junction box 30 and the bracket 20, and the buffer pad 40 is fixed to the second surface 32 of the junction box 30;
[0046] The material of the buffer pad 40 is an elastic material.
[0047] Specifically, the photovoltaic device further includes a buffer pad 40, and the buffer pad 40 is fixed to the second surface 32 of the junction box 30, so that the buffer pad 40 is located between the junction box 30 and the bracket 20. When the photovoltaic module 10 is subjected to a positive load, the photovoltaic module 10 will bend. At this time, the junction box 30 and the buffer pad 40 will support between the photovoltaic module 10 and the bracket 20, that is, the junction box 30 and the buffer pad 40 will play a certain supporting role for the photovoltaic module 10, avoiding excessive deformation of the photovoltaic module 10 and causing damage to the photovoltaic module 10.
[0048] When the junction box 30 and the buffer pad 40 support between the photovoltaic module 10 and the bracket 20 at the same time, the buffer pad 40 will come into contact with the bracket 20, thereby preventing the second surface 32 of the junction box 30 from directly contacting the bracket 20. The buffer pad 40 effectively protects the junction box 30 and avoids damage to the junction box 30 caused by direct contact between the junction box 30 and the bracket 20. At the same time, the material of the buffer pad 40 is an elastic material, and the setting of the buffer pad 40 is beneficial to reducing the stress of the junction box 30, thereby further reducing the local stress between the junction box 30 and the photovoltaic module 10 and improving the load capacity of the bracket 20.
[0049] In some alternative embodiments, the material of the buffer pad 40 is rubber, silica gel or elastic plastic. Thus, the buffer pad 40 effectively reduces the stress of the junction box 30, which is beneficial to reducing the local stress between the junction box 30 and the photovoltaic module 10 and improving the load capacity of the bracket 20.
[0050] It should be noted that this embodiment exemplarily shows that the material of the buffer pad 40 is rubber, silica gel or elastic plastic. In other embodiments of the present application, the material of the buffer pad 40 can also be set to other elastic materials according to actual needs, and the present application will not elaborate here one by one.
[0051] Continue to refer to Figure 3 and Figure 4 , in some alternative embodiments, the buffer pad 40 includes a third surface 41 and a fourth surface 42 arranged opposite to each other. The third surface 41 of the buffer pad 40 is fixed to the second surface 32 of the junction box 30. The fourth surface 42 of the buffer pad 40 is located on the side of the buffer pad 40 close to the bracket 20. The third surface 41 of the buffer pad 40 has the same shape as the second surface 32 of the junction box 30, and the fourth surface 42 of the buffer pad 40 also has the same shape as the second surface 32 of the junction box 30.
[0052] Specifically, the buffer pad 40 includes a third surface 41 and a fourth surface 42 which are oppositely arranged. The third surface 41 of the buffer pad 40 is fixed to the second surface 32 of the junction box 30, thereby fixing the buffer pad 40 to the second surface 32 of the junction box 30. Optionally, the third surface 41 of the buffer pad 40 and the second surface 32 of the junction box 30 can be fixed by bonding. Of course, in other embodiments of the present application, the third surface 41 of the buffer pad 40 and the second surface 32 of the junction box 30 can also be fixed by other means, which will not be elaborated herein one by one.
[0053] The third surface 41 of the buffer pad 40 has the same shape as the second surface 32 of the junction box 30, which is beneficial to fixing the third surface 41 of the buffer pad 40 to the second surface 32 of the junction box 30 and improving the connection stability between the buffer pad 40 and the junction box 30.
[0054] When the junction box 30 and the buffer pad 40 are both supported between the photovoltaic module 10 and the bracket 20, the buffer pad 40 will come into contact with the bracket 20. The fourth surface 42 of the buffer pad 40 has the same shape as the second surface 32 of the junction box 30, and the second surface 32 of the junction box 30 is bent away from the bracket 20, so that the fourth surface 42 of the buffer pad 40 is also bent away from the bracket 20. Since the bracket 20 is cylindrical, when the fourth surface 42 of the buffer pad 40 contacts the bracket 20, the contact area between the fourth surface 42 of the buffer pad 40 and the bracket 20 is effectively increased, thereby effectively reducing the local stress between the junction box 30 and the photovoltaic module 10 and enhancing the load-bearing capacity of the bracket 20.
[0055] Continue to refer to Figure 3 and Figure 4 , in some alternative embodiments, the vertical projection of the second surface 32 of the junction box 30 on the photovoltaic module 10 coincides with the vertical projection of the buffer pad 40 on the photovoltaic module 10.
[0056] Specifically, the vertical projection of the second surface 32 of the junction box 30 on the photovoltaic module 10 coincides with the vertical projection of the buffer pad 40 on the photovoltaic module 10, that is, the buffer pad 40 completely covers the second surface 32 of the junction box 30, effectively improving the protection effect on the junction box 30.
[0057] At the same time, the buffer pad 40 completely covers the second surface 32 of the junction box 30, effectively reducing the overall stress of the junction box 30, which is beneficial to reducing the local stress between the junction box 30 and the photovoltaic module 10 and enhancing the load-bearing capacity of the bracket 20.
[0058] Figure 5 A schematic diagram of an overall structure of the junction box and the buffer pad provided by the present application, refer to Figures 2 - 5In some optional embodiments, the buffer pad 40 includes a plurality of through holes 43 , and when the photovoltaic component 10 is in a planar state, the through holes 43 penetrate the buffer pad 40 along a direction parallel to the plane where the photovoltaic component 10 is located.
[0059] Specifically, when the junction box 30 and the buffer pad 40 are supported between the photovoltaic module 10 and the bracket 20 at the same time, the buffer pad 40 will contact the bracket 20, thereby preventing the second surface 32 of the junction box 30 from directly contacting the bracket 20. The buffer pad 40 effectively protects the junction box 30 and prevents the junction box 30 from directly contacting the bracket 20 and causing damage to the junction box 30. At the same time, the buffer pad 40 includes a plurality of through holes 43. When the photovoltaic module 10 is in a planar state, the through holes 43 penetrate the buffer pad 40 along a direction parallel to the plane where the photovoltaic module 10 is located, which is conducive to further reducing the stress of the junction box 30, thereby further reducing the local stress of the junction box 30 and the photovoltaic module 10, and improving the load capacity of the bracket 20.
[0060] Optionally, the through hole 43 penetrates the buffer pad 40 along the extension direction of the bracket 20. Since the second surface 32 of the junction box 30 is bent in a direction away from the bracket 20, that is, in a direction perpendicular to the extension direction of the bracket 20, relative to the two ends of the second surface 32 of the junction box 30, the middle area of the second surface 32 of the junction box 30 is recessed in a direction away from the bracket 20, and along the extension direction of the bracket 20, the through hole 43 penetrates the buffer pad 40, that is, the through hole 43 can be arranged along the extension direction of the bracket 20, which is conducive to reducing the difficulty of arranging the through hole 43 in the buffer pad 40.
[0061] Continue to refer Figure 1 and Figure 2 In some optional embodiments, when the photovoltaic component 10 is in a planar state, the thickness of the junction box 30 along the direction perpendicular to the plane where the photovoltaic component 10 is located is 16.5-17.5 mm.
[0062] Specifically, when the thickness of the junction box 30 is less than 16.5 mm, when the photovoltaic module 10 is subjected to a frontal load and the photovoltaic module 10 bends, the junction box 30 cannot play the role of receiving the laminate in the photovoltaic module 10, and thus cannot prevent the laminate in the photovoltaic module 10 from further deforming, resulting in a large deformation of the laminate in the photovoltaic module 10. When the thickness of the junction box 30 is greater than 17.5 mm, when the photovoltaic module 10 is cured and unloaded, the middle position of the laminate in the photovoltaic module 10 sinks, and the junction box 30 is prevented from hitting the laminate in the adjacent photovoltaic module 10, causing the risk of the laminate in the adjacent photovoltaic module 10 exploding due to stress.
[0063] That is, when the photovoltaic module 10 is in a planar state, along the direction perpendicular to the plane where the photovoltaic module 10 is located, the thickness of the junction box 30 is 16.5 - 17.5 mm. When the photovoltaic module 10 is subjected to a positive load and the photovoltaic module 10 bends, it can prevent the further deformation of the laminate in the photovoltaic module 10. At the same time, it effectively reduces the risk of the laminate in the photovoltaic module 10 bursting due to stress during the curing and offline processes of the photovoltaic module 10.
[0064] Of course, in other embodiments of the present application, the thickness of the junction box 30 can also be set to other values according to the setting requirements of the frame and laminate in the photovoltaic module 10, and the present application will not elaborate on this one by one here.
[0065] Figure 6 For Figure 1 a front view of the described photovoltaic device, refer to Figure 1 、 Figure 2 and Figure 6 In some alternative embodiments, the photovoltaic device further includes a connector 50, and the back surface 12 of the photovoltaic module 10 is fixed to the bracket 20 through the connector 50.
[0066] Along the extending direction of the bracket 20, connectors 50 are provided at both ends of the bracket 20, and the junction box 30 is located between the two connectors 50.
[0067] Specifically, the photovoltaic device further includes a connector 50, and the bracket 20 is fixed to the part of the frame of the photovoltaic module 10 on the back surface 12 of the photovoltaic module 10 through the connector 50, so as to realize the fixation of the back surface 12 of the photovoltaic module 10 to the bracket 20 through the connector 50.
[0068] Along the extending direction of the bracket 20, connectors 50 are provided at both ends of the bracket 20, that is, both ends of the bracket 20 are respectively fixed to both ends of the photovoltaic module 10, and the fixation stability between the photovoltaic module 10 and the bracket 20 is relatively high.
[0069] Both ends of the bracket 20 are respectively fixed to both ends of the photovoltaic module 10. Thus, in the natural state, there is a gap between the photovoltaic module 10 and the bracket 20. The junction box 30 is located between the two connectors 50, and the junction box 30 can be located in the gap between the photovoltaic module 10 and the bracket 20. When the photovoltaic module 10 is subjected to a positive load, the photovoltaic module 10 will bend. At this time, the junction box 30 will be supported between the photovoltaic module 10 and the bracket 20, that is, the junction box 30 will play a certain supporting role for the photovoltaic module 10 to avoid excessive deformation of the photovoltaic module 10 causing damage to the photovoltaic module 10.
[0070] As can be seen from the above embodiments, a photovoltaic device provided by the present application at least achieves the following beneficial effects:
[0071] In the photovoltaic device provided by the present application, when the photovoltaic module is subjected to a positive load, the photovoltaic module will bend. At this time, the junction box will be supported between the photovoltaic module and the bracket, that is, the junction box will play a certain supporting role for the photovoltaic module to prevent excessive deformation of the photovoltaic module from causing damage to the photovoltaic module. At the same time, when the junction box is supported between the photovoltaic module and the bracket, the second surface of the junction box will come into contact with the bracket. The bracket is cylindrical, and the second surface of the junction box bends away from the bracket, that is, in the direction perpendicular to the extension direction of the bracket, the middle area of the second surface of the junction box is recessed away from the bracket relative to the two ends of the second surface of the junction box. Therefore, when the second surface of the junction box contacts the bracket, the contact area between the second surface of the junction box and the bracket is effectively increased, thereby effectively reducing the local stress between the junction box and the photovoltaic module and improving the load capacity of the bracket.
[0072] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.
Claims
1. A photovoltaic device, characterized in that, Comprising: A photovoltaic module, the photovoltaic module having a front side and a back side; A bracket, the bracket being cylindrical, the back side of the photovoltaic module being fixed to the bracket; A junction box, the junction box being located between the photovoltaic module and the bracket, the junction box including a first surface and a second surface arranged opposite to each other, the first surface of the junction box being fixed to the back side of the photovoltaic module, the second surface of the junction box being located on the side of the junction box close to the bracket, the second surface of the junction box being bent in a direction away from the bracket, and the second surface of the junction box being in an arc shape.
2. The photovoltaic device according to claim 1, wherein The curvature radius of the second surface of the junction box is the same as the radius of the bracket.
3. The photovoltaic device according to claim 1, wherein The photovoltaic device further includes a buffer pad, the buffer pad being located between the junction box and the bracket, the buffer pad being fixed to the second surface of the junction box; The material of the buffer pad is an elastic material.
4. The photovoltaic device according to claim 3, wherein The buffer pad includes a third surface and a fourth surface arranged opposite to each other, the third surface of the buffer pad being fixed to the second surface of the junction box, the fourth surface of the buffer pad being located on the side of the buffer pad close to the bracket, the third surface of the buffer pad having the same shape as the second surface of the junction box, and the fourth surface of the buffer pad also having the same shape as the second surface of the junction box.
5. The photovoltaic device according to claim 3, wherein The vertical projection of the second surface of the junction box on the photovoltaic module coincides with the vertical projection of the buffer pad on the photovoltaic module.
6. The photovoltaic device according to claim 3, wherein The buffer pad includes a plurality of through holes, and when the photovoltaic module is in a planar state, in a direction parallel to the plane where the photovoltaic module is located, the through holes penetrate through the buffer pad.
7. The photovoltaic device according to claim 3, wherein The material of the buffer pad is rubber, silica gel or elastic plastic.
8. The photovoltaic device according to claim 1, wherein When the photovoltaic module is in a planar state, in a direction perpendicular to the plane where the photovoltaic module is located, the thickness of the junction box is 16.5 - 17.5 mm.
9. The photovoltaic device according to claim 1, wherein The photovoltaic device further includes a connecting member, the back side of the photovoltaic module being fixed to the bracket through the connecting member; Along the extending direction of the bracket, the connecting members are provided at both ends of the bracket, and the junction box is located between the two connecting members.