Photovoltaic module junction box
By setting an annular groove and a hollowed-out mesh at the bottom edge of the junction box, the problem of uneven silicone coating was solved, achieving both economical use of silicone and reliable fixing, and improving the appearance quality of the photovoltaic modules.
Patent Information
- Application Number
- CN202520362782.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-04
AI Technical Summary
The existing junction box fixing method does not allow for direct observation of the uniformity of silicone coating, resulting in a large amount of silicone used and the potential for insecure fixing.
An annular groove is set at the bottom edge of the junction box, and a perforated grid is set at the bottom of the groove. The silicone coating is observed through the perforated grid to reduce silicone overflow and ensure uniform coating.
Reduce the amount of silicone used, minimize waste, improve fixation firmness and appearance visibility, and avoid the risk of localized insecure fixation.
Smart Images
Figure CN223859113U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to solar cell technical field, concretely relates to a kind of photovoltaic module junction box. BACKGROUND
[0002] The main role of junction box is to connect solar photovoltaic module and load, the current of photovoltaic module is conducted to junction terminal entirely through busbar, and then is conducted to electric equipment through junction box and cable, and junction box plays a very important role in solar cell.
[0003] Junction box is fixed on the back of photovoltaic module, the back of photovoltaic module is smooth back plate, generally glass plate, and the bottom surface of junction box needs to be bonded to the back of photovoltaic module using silicone adhesive. Since the bottom of the currently used junction box is flat, the silicone adhesive is directly applied on the edge of the bottom of the junction box during gluing, and the junction box is bonded to the back of the photovoltaic module using a pressing method.
[0004] The current gluing and fixing method of the junction box requires a large amount of silicone adhesive. After the junction box is bonded to the back of the module, the silicone adhesive overflows around the junction box, so that the silicone adhesive can be observed and it can be determined that the junction box is firmly fixed to the photovoltaic module. However, even if the silicone adhesive overflows, there is still a phenomenon of uneven application of silicone adhesive on the bottom of the junction box, and it is not possible to observe whether the silicone adhesive is evenly applied, and there is a risk of insecure fixation of the junction box. SUMMARY
[0005] The utility model embodiment provides a kind of photovoltaic module junction box, to solve the problem that whether the silicone adhesive on the bottom of the junction box is evenly applied cannot be directly observed, and the amount of glue is large.
[0006] To achieve the above object, the utility model adopts the technical scheme of providing a kind of photovoltaic module junction box, comprising: a junction box body, the bottom edge of the junction box body is provided with an annular groove, the annular groove and the surrounding board of the junction box body are arranged in position error on the front projection of the back of the photovoltaic module;The bottom of the annular groove is provided with a hollow grid, and when the junction box body is bonded to the back of the photovoltaic module by the silicone adhesive applied in the annular groove, the silicone adhesive in the annular groove is observed through the hollow grid.
[0007] In a realizable manner, the depth h1 of the bottom plane of the hollow grid from the bottom outer plane of the junction box body is 3±0.5mm.
[0008] In a realizable manner, the thickness h2 of the hollow grid is greater than 1mm.
[0009] In a realizable manner, the side of the hollow grid away from the bottom outer plane of the junction box body is flush with the bottom inner plane of the junction box body.
[0010] In an implementable manner, the thickness w1 of the surrounding plate of the junction box body is greater than 1mm.
[0011] In an implementable manner, the distance w2 from the outer wall of the annular groove to the inner side surface of the surrounding plate of the junction box body is 1±0.5mm.
[0012] In an implementable manner, the cross-sectional shape of the annular groove is rectangular or trapezoidal.
[0013] In an implementable manner, the cell shape of the hollow grid is polygonal.
[0014] In an implementable manner, the cell shape of the hollow grid is triangular, rectangular or hexagonal.
[0015] The photovoltaic module junction box has the beneficial effects that: first, the annular groove is arranged at the bottom edge of the junction box and is dislocated from the surrounding plate, and the groove bottom of the annular groove is provided with a hollow grid, when the junction box needs to be bonded to the back of the photovoltaic module, the silicone is applied in the annular groove, the silicone cannot overflow at will due to the limitation of the annular groove, the use amount of the silicone can be reduced, the waste of the silicone is reduced, and therefore the production cost of the junction box can be reduced; second, after the junction box is applied with the silicone and is pressed on the back of the photovoltaic module, whether the silicone applied along the annular groove is uniform can be directly observed through the hollow grid, so that the firmness of the bonding and fixing of each part of the junction box can be ensured, and the hidden danger of local non-fixing due to no silicone is avoided; third, due to the reduction of the silicone overflow phenomenon, the silicone overflowed from the edge of the junction box body is avoided to be adhered to other positions, and therefore the visibility of the appearance is improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The top view structural schematic of the photovoltaic module junction box provided by the utility model embodiment Figure 1 ;
[0017] Figure 2 The structure schematic of the photovoltaic module junction box provided by the utility model embodiment is adhered to the photovoltaic module Figure 1 The sectional view structure along the A-A line
[0018] Figure 3 The top view structural schematic of the photovoltaic module junction box provided by the utility model embodiment Figure 2 ;
[0019] Figure 4 The structure schematic of the photovoltaic module junction box provided by the utility model embodiment is adhered to the photovoltaic module
[0020] Explanation of reference signs:
[0021] 1, junction box body; 11, the coaming; 12, the hollow grid; 13, annular groove; 2, silica gel; 3, photovoltaic module. DETAILED DESCRIPTION
[0022] In order to make the technical problems, technical solutions and beneficial effects of the utility model to be solved more clear and obvious, the utility model is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and are not used to limit the utility model.
[0023] Please see Figures 1 to 4 , now the junction box of the photovoltaic module provided by the utility model is described. The junction box of the photovoltaic module includes a junction box body 1, the bottom edge of the junction box body 1 is provided with an annular groove 13, the annular groove 13 and the coaming 11 of the junction box body 1 are arranged in a position offset from the orthographic projection on the back of the photovoltaic module 3; the bottom of the annular groove 13 is provided with a hollow grid 12, when the junction box body 1 is adhered to the back of the photovoltaic module 3 through the silica gel 2 applied in the annular groove 13, the silica gel 2 in the annular groove 13 can be observed through the hollow grid 12.
[0024] The junction box of the photovoltaic module provided by the utility model has the beneficial effects compared with the prior art: first, the annular groove 13 offset from the coaming 11 is arranged at the bottom edge of the junction box, and the groove bottom of the annular groove 13 is arranged as the hollow grid 12, when the junction box needs to be adhered to the back of the photovoltaic module 3, the silica gel 2 is applied in the annular groove 13, the silica gel 2 cannot overflow at will due to the limitation of the annular groove 13, the use amount of the silica gel 2 can be reduced, the waste of the silica gel 2 is reduced, and therefore the production cost of the junction box can be reduced; second, after the junction box is applied with the silica gel 2 and is pressed on the back of the photovoltaic module 3, whether the silica gel 2 applied along the annular groove 13 is uniform can be directly observed through the hollow grid 12, the glue application effect can be checked, and therefore the firmness of the adhesive fixation of each part of the junction box can be ensured, and the hidden danger of local non-adhesive fixation due to the lack of the silica gel 2 can be avoided; third, due to the reduction of the silica gel 2 overflow phenomenon, the silica gel 2 overflowed from the edge of the junction box body 1 can be avoided to adhere to other positions, and therefore the visibility of the appearance is improved.
[0025] The adhesive fixation process of the junction box on the back of the photovoltaic module 3 provided by the application is as follows:
[0026] Firstly, the annular groove 13 is processed at the bottom edge of the junction box, or the annular groove 13 is directly injection molded, the annular groove 13 is 1 millimeter away from the edge of the junction box, the width of the annular groove 13 is 3 millimeters, the hollow grid 12 is integrally formed in the annular groove 13, and the hollow grid 12 is permeable to the inside of the junction box body 1, so that the situation at the bottom of the junction box can be observed from above the box body.
[0027] Secondly, glue in the annular groove 13 at the bottom of the junction box body 1, after the completion of the glue, the height of the glue slightly higher than the bottom of the junction box body 1 outside the plane.
[0028] Thirdly, the junction box body 1 is placed in the designated position, then slightly press, to ensure that the junction box body 1 bottom and the back of the photovoltaic module 3 closely.
[0029] In some embodiments, referring to Figure 2 , the depth h1 of the bottom plane of the hollow grid 12 from the bottom outside plane of the junction box body 1 is 3±0.5mm, too high or too low will affect the bonding effect and bonding quality.
[0030] In some embodiments, referring to Figure 2 , the thickness h2 of the hollow grid 12 is greater than 1mm, the hollow grid 12 has a limiting effect on the silica gel 2, if the thickness of the hollow grid 12 is too thin, the hollow grid 12 as the bottom of the annular groove 13 does not have a higher strength, it is easy to cause the silica gel 2 to overflow into the junction box body 1, then it can not guarantee the full bonding of the silica gel 2 and the back of the photovoltaic module, which will affect the bonding effect and bonding quality. At the same time, the hollow grid 12 also bears the connection between the bottom of the junction box body 1 and the surrounding plate 11 of the junction box body 1, if the thickness of the hollow grid 12 is too thin, the strength is insufficient, it is easy to cause the surrounding plate 11 of the junction box body 1 to separate from the bottom of the junction box body 1.
[0031] In some embodiments, referring to Figure 2 , the side of the hollow grid 12 away from the bottom outside plane of the junction box body 1 is flush with the bottom inside plane of the junction box body 1.
[0032] In some embodiments, referring to Figure 2 , the thickness w1 of the surrounding plate 11 of the junction box body 1 is greater than 1mm, to ensure the structural strength of the surrounding plate 11 of the junction box body 1.
[0033] In some embodiments, referring to Figure 2 , the distance w2 between the outer wall of the annular groove 13 and the inner side of the surrounding plate 11 of the junction box body 1 is 1±0.5mm. The hollow grid 12 in the annular groove 13 bears the connection between the bottom of the junction box body 1 and the surrounding plate 11, therefore, it is best to maintain a certain distance between the annular groove 13 and the surrounding plate 11, to ensure the firmness of the connection between the parts of the junction box body 1 as a whole or an integral structure.
[0034] In some embodiments, referring to Figure 2 , the cross-sectional shape of the annular groove 13 is rectangular or trapezoidal.
[0035] In some embodiments, referring to Figure 1 and Figure 3As shown, the cell shape of the hollow grid 12 is polygonal.
[0036] In some embodiments, referring to Figure 1 and Figure 3 As shown, the cell shape of the hollow grid 12 is triangular, rectangular or hexagonal.
[0037] In the above embodiments, the description of each embodiment is focused on, and the part not described or recorded in a certain embodiment can be referred to the related description of other embodiments.
[0038] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A photovoltaic module junction box, characterized by, Comprising: The junction box body (1) is provided with an annular groove (13) at the bottom edge, which is arranged in the normal projection of the apron (11) of the junction box body (1) on the back of the photovoltaic module (3); the bottom of the annular groove (13) is provided with a hollow grid (12), and when the junction box body (1) is bonded on the back of the photovoltaic module (3) through the silicone (2) coated in the annular groove (13), the silicone (2) in the annular groove (13) is observed through the hollow grid (12).
2. The photovoltaic module junction box of claim 1, wherein, The depth h1 of the bottom plane of the hollow grid (12) from the bottom outer plane of the junction box body (1) is 3±0.5mm.
3. The photovoltaic module junction box of claim 1, wherein, The thickness h2 of the hollow grid (12) is greater than 1mm.
4. The photovoltaic module junction box of claim 1, wherein, The side of the hollow grid (12) away from the bottom outer plane of the junction box body (1) is flush with the bottom inner plane of the junction box body (1).
5. The photovoltaic module junction box of claim 1, wherein, The thickness w1 of the apron (11) of the junction box body (1) is greater than 1mm.
6. The photovoltaic module junction box of claim 1, wherein, The distance w2 between the outer wall of the annular groove (13) and the inner side of the apron (11) of the junction box body (1) is 1±0.5mm.
7. The photovoltaic module junction box of claim 1, wherein, The cross-sectional shape of the annular groove (13) is rectangular or trapezoidal.
8. The photovoltaic module junction box of claim 1, wherein, The cell shape of the hollow grid (12) is polygonal.
9. The photovoltaic module junction box of claim 8, wherein, The shape of the cell of the hollow grid (12) is triangular, rectangular or hexagonal.