Junction box and photovoltaic module
By using a combination of clamping structure and sealing strips in the junction box, the problem of poor sealing of the junction box is solved, and higher sealing and water-blocking capacity are achieved, the overall sealing performance of the photovoltaic module is improved, and the photovoltaic module is protected. The power generation performance of components.
Patent Information
- Application Number
- CN202420617418.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-27
AI Technical Summary
The existing junction boxes have poor sealing properties and cannot effectively prevent water vapor from entering, resulting in a degradation of the power generation performance of photovoltaic modules.
A junction box is designed, using a clamping structure and sealing strip between the box body and the box cover. The sealing property is enhanced through the clamping structure and the sealing layer. The grooves are used during the clamping process between the box cover and the box body. The raised joints are combined with glue strips to form a tight sealing effect, and water barrier gaskets are added to the photovoltaic module to further improve the sealing performance.
It significantly improves the sealing property and water-blocking ability of the junction box, enhances the overall sealing performance of the photovoltaic module, prevents water vapor from entering, thereby protecting the power generation performance of the photovoltaic module.
Smart Images
Figure CN222192294U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of solar cells, in particular to a junction box and a photovoltaic module. Background Art
[0002] The junction box is a connecting device between the solar cell array composed of photovoltaic modules and the solar charging control device. Its main function is to connect multiple photovoltaic modules, connect the power generated by the solar cells to the external circuit, and conduct the electrical energy generated by the photovoltaic modules.
[0003] To ensure the power generation performance of photovoltaic modules, a good sealing structure is required. At present, the way to connect photovoltaic modules to junction boxes is often to reserve lead-out bus bars, and then add silicone to the junction box and the contact area between the junction box and the photovoltaic module, and fill the silicone as a sealing protection measure. However, with the gradual application of high-efficiency cells such as heterojunction and perovskite, since high-efficiency cells will use some special coating materials, they are more sensitive to water vapor. Water vapor may enter the module through the junction box hole, resulting in the existing silicone packaging method being unable to meet the packaging requirements. In addition, the box body and the box cover of the existing junction box cannot be completely closed, leaving a gap, and water vapor can penetrate into the interior of the junction box through the gap, which also leads to poor sealing of the junction box.
[0004] It is imperative to improve the sealing performance of the junction box. Utility Model Content
[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor sealing of the junction box in the prior art, thereby providing a junction box and a photovoltaic module.
[0006] The utility model provides a junction box, comprising a box body and a box cover, the interior of the box body is provided with a accommodating cavity for arranging a conductive transmission component, the box body has a box body side wall surrounding the accommodating cavity, and the box body side wall is provided with a first clamping structure; the box cover has a second clamping structure; when the box cover and the box body are relatively buckled, the first clamping structure and the second clamping structure are relatively clamped; the first clamping structure and the second clamping structure can have a groove, and the other is a protrusion suitable for clamping with the groove; a first rubber strip that fits the inner wall of the groove is provided in the groove, and the first rubber strip forms a clamping seam; the protrusion is the second rubber strip, or the surface of the protrusion is provided with the second rubber strip, and the second rubber strip is suitable for being inserted into the clamping seam to form a clamping seal with the first rubber strip.
[0007] Optionally, the first rubber strip includes a first sub-rubber strip and a second sub-rubber strip; the first sub-rubber strip and the second sub-rubber strip together form an axially symmetrical figure in the width direction of the groove, and the axis of symmetry is the center line of the clamping seam; the cross-sectional shape of the first clamping structure includes two axially symmetrical right triangles or right-angled sectors, and the axis of symmetry is the center line of the clamping seam; the cross-sectional shape of the second clamping structure includes a triangle or a sector, and the vertex angle of the triangle or the arc-shaped side of the sector is suitable for inserting into the clamping seam; the bottom ends of the first sub-rubber strip and the second sub-rubber strip are connected and are arranged back to back; the cross-sectional shape of the first sub-rubber strip includes an arc or a straight line; the cross-sectional shape of the second sub-rubber strip includes an arc or a straight line; the cross-sectional shape of the second rubber strip includes an arc or a "V" shape.
[0008] Optionally, the side walls of the box body include a first side wall and a second side wall that are opposite to each other, and a third side wall and a fourth side wall that are opposite to each other; the first side wall and the second side wall are both provided with a first clip-on structure along the length direction of the box body; the box cover is movably connected to the box body; the box cover has a second clip-on structure that is clipped with the first clip-on structure; when the box cover and the box body are relatively buckled, one end of the box cover is suitable for passing through the third side wall of the box body; the junction box also includes: a telescopic structure, which passes through a portion of the fourth side wall of the box body to control the extension and retraction of the box cover; the fourth side wall is provided with the first clip-on structure along the width direction of the box body.
[0009] Optionally, a first clamping structure is provided at one end of the box body side wall facing away from the bottom plate of the box body; and the box cover comprises a box cover body and a second clamping structure located in an edge area of the box cover body.
[0010] Optionally, the depth of the groove is 2mm-4mm; the width of the groove is 1mm-4mm; the depth of the protrusion is 2mm-4mm; the width of the protrusion is 1mm-4mm.
[0011] Optionally, it also includes: a sealant layer; the sealant layer is located inside the box body; the sealant layer fills the accommodating cavity and covers the conductive transmission component; the sealant layer includes a butyl layer.
[0012] Optionally, the first rubber strip includes a rubber strip or a butyl rubber strip; the second rubber strip includes a rubber strip or a butyl rubber strip.
[0013] The utility model also provides a photovoltaic module, comprising: the junction box described in the utility model; a photovoltaic component, wherein the junction box is located on the back side of the photovoltaic component; a side of the box body facing away from the box cover has a lead opening group; the lead opening group faces the photovoltaic component; a water-blocking gasket, located between the photovoltaic component and the junction box; the water-blocking gasket has a second lead opening group arranged in a one-to-one correspondence with the lead opening group.
[0014] Optionally, the water-blocking gasket includes a butyl rubber gasket, and the projected area of the water-blocking gasket on the surface of the photovoltaic module is greater than or equal to the projected area of the junction box on the surface of the photovoltaic module; the cross-sectional shape of the water-blocking gasket includes a rectangle; the length of the water-blocking gasket is 50mm-80mm; the width of the water-blocking gasket is 20mm-30mm; and the thickness of the water-blocking gasket is 1mm-2mm.
[0015] Optionally, the photovoltaic component includes a solar cell group and a packaging layer located on at least one side of the solar cell group; a third lead port group is opened through the packaging layer; the third lead port group is arranged in a one-to-one correspondence with the lead port group and the second lead port group; the photovoltaic component also includes: a lead wire group, one end of which is connected to the solar cell group, and the other end passes through the third lead port group, the second lead port group and the lead port group to be connected to the conductive transmission component; the photovoltaic module also includes: a packaging film; the packaging film is located between the solar cell group and the packaging layer.
[0016] The beneficial effects of the utility model are:
[0017] The utility model provides a junction box, in which a first clamping structure is arranged on the side wall of the box body, and a box cover has a second clamping structure. When the box cover and the box body are relatively buckled, the first clamping structure and the second clamping structure are relatively clamped, which play a limiting role on the box cover and the box body, and avoid misalignment between the box cover and the box body; wherein, since one of the first clamping structure and the second clamping structure is a groove, and the other is a protrusion suitable for clamping with the groove, the side edges of the box cover and the box body are aligned, and the groove and the protrusion clamped with the groove are mutually engaged; further, a first rubber strip that fits the inner wall of the groove is arranged in the groove, and the first rubber strip forms a clamping seam; the protrusion is the second rubber strip, or the surface of the protrusion is arranged with the second rubber strip, and the second rubber strip is suitable for being inserted into the clamping seam to form a clamping connection with the first rubber strip, so that when the box cover and the box body are buckled, the tightness between the box cover and the box body is increased, which can improve the sealing of the junction box, and further enhance the water blocking ability of the junction box. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 This is a schematic diagram of the structure of the box body in Example 1 of the utility model;
[0020] Figure 2 This is a schematic diagram of the structure of the box cover in Example 1 of the utility model;
[0021] Figure 3 It is a top view of the box body in Example 1 of the utility model;
[0022] Figure 4 It is a top view of the junction box in Example 2 of the utility model;
[0023] Figure 5 This is a schematic diagram of the structure of the photovoltaic module in Embodiment 3 of the present utility model;
[0024] Description of reference numerals:
[0025] A-box body; 1-conductive transmission part; 2-side wall of box body; 3-first clamping structure; B-box cover; 4-second clamping structure; 5-first rubber strip; 51-first sub-rubber strip; 52-second sub-rubber strip; 6-sealing rubber layer; 7-lead opening group; 71-positive lead opening; 72-negative lead opening; 8-water-blocking gasket; 9-solar cell group; 10-first packaging layer; 11-second packaging layer; 12-positive lead wire; 13-negative lead wire; 14-first packaging film; 15-second packaging film. DETAILED DESCRIPTION
[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0028] Example 1
[0029] Combined with reference Figure 1-Figure 3The present embodiment provides a junction box, comprising a box body A and a box cover B, wherein the box body A has an accommodating cavity for arranging a conductive transmission member, the box body A has a box body side wall 2 surrounding the accommodating cavity, and the box body side wall 2 is provided with a first clamping structure 3; the box cover B has a second clamping structure 4; when the box cover B is relatively buckled with the box body A, the first clamping structure 3 can be relatively clamped with the second clamping structure 4; one of the first clamping structure 3 and the second clamping structure 4 has a groove, and the other is a protrusion suitable for clamping with the groove; a first rubber strip 5 is provided in the groove to fit the inner wall of the groove, and the first rubber strip 5 forms a clamping seam; the protrusion is the second rubber strip, or the surface of the protrusion is provided with the second rubber strip, and the second rubber strip is suitable for being inserted into the clamping seam to form a clamping seal with the first rubber strip.
[0030] In this embodiment, a first snap-fitting structure 3 is provided on the side wall 2 of the box body, and the box cover B has a second snap-fitting structure 4. When the box cover B is relatively buckled with the box body A, the first snap-fitting structure 3 and the second snap-fitting structure 4 are relatively snap-fitted, which plays a limiting role on the box cover B and the box body A, and avoids misalignment between the box cover B and the box body A; wherein, since one of the first snap-fitting structure 3 and the second snap-fitting structure 4 has a groove, and the other is a protrusion suitable for snapping with the groove, the side edges of the box cover B and the box body A are aligned, and the groove and the protrusion snapped with the groove are mutually engaged; further, a first rubber strip 5 is provided in the groove to fit the inner wall of the groove, and the first rubber strip 5 forms a snap-fitting seam; the protrusion is the second rubber strip, or the surface of the protrusion is provided with the second rubber strip, and the second rubber strip is suitable for being inserted into the snap-fitting seam and snapping with the first rubber strip 5, so that the tightness between the box cover B and the box body A is increased, the sealing of the junction box can be improved, and the water-blocking ability of the junction box is enhanced.
[0031] In this embodiment, a first clamping structure 3 is provided at one end of the box body side wall 2 facing away from the bottom plate of the box body A; the box cover B includes a box cover body and a second clamping structure 4 located at the edge area of the box cover body.
[0032] The first adhesive strip 5 includes a first sub-adhesive strip 51 and a second sub-adhesive strip 52. Figure 1 The first rubber strip 5 includes a first sub-rubber strip 51 and a second sub-rubber strip 52 which are connected at the bottom ends and are arranged opposite to each other; the first sub-rubber strip 51 and the second sub-rubber strip 52 together form an axially symmetrical figure, and the axis of symmetry is the center line of the card seam.
[0033] In one embodiment, the cross-sectional shape of the first clamping structure 3 includes two right triangles or right sectors that are axially symmetrical, and the axis of symmetry is the center line of the clamping seam; the cross-sectional shape of the second clamping structure 4 includes a triangle or a sector, and the vertex of the triangle or the arc side of the sector is suitable for inserting into the clamping seam; the cross-sectional shape of the first sub-strip 51 includes an arc or a straight line; the cross-sectional shape of the second sub-strip 52 includes an arc or a straight line; the cross-sectional shape of the second strip includes a sector or a "V" shape. It should be noted that when the cross-sectional shape of the first sub-strip 51 is an arc, the cross-sectional shape of the second sub-strip 52 is a sector, and the cross-sectional shape of the second strip is a semicircular; when the cross-sectional shape of the first sub-strip 51 is a straight line, the cross-sectional shape of the second sub-strip 52 is a straight line, and the cross-sectional shape of the second strip is a "V" shape. The purpose is to make the first strip 5 and the second strip completely bite, avoid leaving a gap between the first strip 5 and the second strip, and enhance the water-blocking ability of the junction box.
[0034] In this embodiment, the cross-sectional shape of the first clamping structure 3 is two axially symmetrical right-angled sectors; the cross-sectional shape of the second clamping structure 4 is a sector, and the cross-sectional shape of the first sub-rubber strip is an arc; the cross-sectional shape of the second sub-rubber strip includes an arc; the cross-sectional shape of the second rubber strip is an arc for illustration.
[0035] In one embodiment, the first rubber strip 5 comprises a rubber strip or a butyl rubber strip. The first sub-strip 51 comprises a rubber strip or a butyl rubber strip, the second sub-strip 52 comprises a rubber strip or a butyl rubber strip; and the second rubber strip comprises a rubber strip or a butyl rubber strip.
[0036] In one embodiment, the depth of the groove is 2 mm-4 mm, for example, 2 mm, 3 mm or 4 mm. If the depth of the groove is too large, the mechanical strength of the side wall of the box body is low and the production cost is high; if the depth of the groove is too small, the depth of the first rubber strip is small, and the limiting effect on the box cover B and the box body A is small, thereby improving the sealing of the junction box.
[0037] In one embodiment, the width of the groove is 1 mm-4 mm, for example, 1 mm, 2 mm, 3 mm or 4 mm. If the width of the groove is too large, the area of the box body occupied by the side wall is large, so that the area of the accommodating cavity of the box body is reduced, and it is difficult to place the conductive transmission component; if the width of the groove is too small, the width of the first rubber strip is small, and the limiting effect on the box cover B and the box body A is small, thereby improving the sealing of the junction box.
[0038] In this embodiment, the width of the first sub-strip 51 is 1 / 2 of the width of the groove; the width of the second sub-strip 52 is 1 / 2 of the width of the groove; the depth of the first sub-strip 51 is equal to the depth of the groove; the depth of the second sub-strip 52 is equal to the depth of the groove.
[0039] In one embodiment, the depth of the protrusion is 2 mm-4 mm, for example, 2 mm, 3 mm or 4 mm. If the depth of the protrusion is too large, the second clamping structure is too large, making the box cover unsightly; if the depth of the protrusion is too small, the depth of the second rubber strip is small, and the limiting effect on the box cover B and the box body A is small, thereby improving the sealing of the junction box.
[0040] In one embodiment, the width of the protrusion is 1 mm-4 mm, for example, 1 mm, 2 mm, 3 mm or 4 mm. If the width of the protrusion is too large, the second clamping structure is too large, making the box cover unsightly; if the width of the protrusion is too small, the width of the second rubber strip is small, and the limiting effect on the box cover B and the box body A is small, thereby improving the sealing of the junction box.
[0041] In one embodiment, the protrusion is a second rubber strip, the depth of the second rubber strip is equal to the depth of the protrusion; the width of the second rubber strip is equal to the width of the protrusion.
[0042] In another embodiment, a second rubber strip is provided on the surface of the protrusion, and the sum of the widths of the protrusion and the second rubber strip is equal to 1 mm-4 mm; the sum of the depths of the protrusion and the second rubber strip is equal to 2 mm-4 mm.
[0043] In one embodiment, continue to refer to Figure 1 , also includes: a sealant layer 6; the sealant layer 6 is located inside the box body A; the sealant layer 6 fills the accommodating cavity and covers the conductive transmission component 1; the sealant layer 6 includes a butyl rubber layer. Butyl rubber is a sealant with isobutylene polymer as the main material, which has excellent weather resistance, heat resistance, acid and alkali resistance, excellent air tightness and electrical insulation properties. Butyl rubber is usually used for sealing of machinery, pipelines, glass, cable joints, etc., as well as buildings, water conservancy projects, etc. In the present application, a butyl rubber layer is filled in the accommodating cavity of the junction box. The butyl rubber layer itself has excellent water-blocking properties, which can prevent external water vapor from invading the accommodating cavity of the junction box, avoid contact between water vapor and the conductive transmission component, and avoid failure of the conductive transmission component.
[0044] Figure 3: is a top view of the box body of the junction box. The box body A has a lead opening group 7 on the side facing away from the box cover B, and the lead opening group 7 includes a positive lead opening 71 and a negative lead opening 72. The positive lead opening 71 is suitable for connecting the positive lead wire of the photovoltaic module with the conductive transmission member; the negative lead opening 72 is suitable for connecting the negative lead wire of the photovoltaic module with the conductive transmission member.
[0045] Figure 3 The middle black area is the first clamping structure 3 arranged on the side of the box body.
[0046] In one embodiment, the cross-sectional shape of the positive lead opening 71 includes a rectangle, and the cross-sectional shape of the negative lead opening 72 includes a rectangle; the sizes of the positive lead opening 71 and the negative lead opening 72 can be specifically set according to actual conditions and are not limited in this application.
[0047] Example 2
[0048] The difference between this embodiment and the above-mentioned embodiment 1 is that:
[0049] refer to Figure 4 The side walls of the box body include a first side wall and a second side wall that are opposite to each other, and a third side wall and a fourth side wall that are opposite to each other; the first side wall and the second side wall are both provided with a first clamping structure 3 along the length direction of the box body A; the box cover B is movably connected to the box body A; the box cover B has a second clamping structure 4 that is clamped with the first clamping structure 3; when the box cover B is relatively buckled with the box body A, one end of the box cover B passes through the third side wall of the box body A.
[0050] The junction box further comprises: a telescopic structure C, which penetrates part of the fourth side wall of the box body A to control the telescopic movement of the box cover B; the fourth side wall is provided with the first clamping structure 3 along the width direction of the box body A.
[0051] Figure 4 It is a top view of the junction box. It can be known that the length direction of the box body A is consistent with the telescopic direction of the telescopic structure C. The circle indicates an enlarged view of the circle, that is, when the box cover and the box body are relatively buckled, the first clamping structure 3 and the second clamping structure 4 are relatively clamped. In this embodiment, the cross-sectional shape of the first clamping structure 3 is two right triangles with axial symmetry; the cross-sectional shape of the second clamping structure 4 is a triangle, and the cross-sectional shape of the first sub-strip is a straight line; the cross-sectional shape of the second sub-strip includes a straight line; the cross-sectional shape of the second strip is a straight line for illustration. It can be understood that the junction box provided in the present application is a plug-in junction box, and the telescopic structure can be manually controlled to make the junction box form a seal.
[0052] Example 3
[0053] This embodiment provides a photovoltaic module, referring to Figure 5 , comprising: at least two junction boxes according to Embodiment 1 or Embodiment 2; a photovoltaic module, wherein the junction box is located on the back side of the photovoltaic module; the box body A has a lead opening group 7 on the side facing away from the box cover B; the lead opening group 7 faces the photovoltaic module; a water-blocking gasket 8 is located between the photovoltaic module and the junction box; the water-blocking gasket 8 has a second lead opening group arranged in a one-to-one correspondence with the lead opening group 7. The second lead opening group includes a second positive lead opening and a second negative lead opening.
[0054] In this embodiment, the water-blocking gasket 8 is located between the photovoltaic module and the junction box. Specifically, the water-blocking gasket 8 is locally heated during the formation process. The water-blocking gasket 8 has an adhesive ability, and a certain pressure is applied to the junction box to complete the bonding of the water-blocking gasket 8 with the photovoltaic module and the junction box. In this way, the probability of a gap between the photovoltaic module and the junction box can be reduced, water vapor is prevented from invading the interior of the photovoltaic module from the bottom of the junction box, and the sealing performance of the photovoltaic module is improved, thereby satisfying the photovoltaic module's high water-blocking ability.
[0055] The projected area of the water-blocking gasket 8 on the surface of the photovoltaic module is greater than or equal to the projected area of the junction box on the surface of the photovoltaic module, which is conducive to the water-blocking gasket 8 fully contacting the bottom of the junction box, preventing water vapor from penetrating into the inside of the junction box from the bottom of the junction box, and improving the water-blocking ability of the junction box itself.
[0056] In one embodiment, the cross-sectional shape of the water-blocking gasket 8 includes a rectangle; the length of the water-blocking gasket 8 is 50mm-80mm, for example, 50mm, 60mm, 70mm or 80mm; the width of the water-blocking gasket 8 is 20mm-30mm, for example, 20mm, 25mm or 30mm.
[0057] In one embodiment, the thickness of the water-blocking gasket 8 is 1 mm-2 mm, for example, 1 mm, 1.5 mm or 2 mm. If the thickness of the water-blocking gasket 8 is too large, it will affect the aesthetics of the photovoltaic module and easily cause waste; if the thickness of the water-blocking gasket 8 is too small, it will have little effect on increasing the sealing performance between the junction box and the photovoltaic module.
[0058] In one embodiment, the water-blocking gasket 8 comprises a butyl rubber gasket. Butyl rubber is a sealant with isobutylene polymer as the main material, which has excellent weather resistance, heat resistance, acid and alkali resistance, excellent air tightness and electrical insulation performance. Since the butyl rubber layer itself has good water-blocking performance, the water-blocking gasket 8 is arranged between the photovoltaic module and the junction box, which can prevent external water vapor from invading the interior of the photovoltaic module and the junction box, and plays an important role in improving the sealing performance of the junction box and the photovoltaic module.
[0059] The photovoltaic module includes a solar cell group 9 and a packaging layer located on at least one side of the solar cell group 9; a third lead opening group is provided through the packaging layer; the third lead opening group is arranged in a one-to-one correspondence with the lead opening group 7 and the second lead opening group. The third lead opening group includes a third positive lead opening and a third negative lead opening.
[0060] Specifically, refer to Figure 5 The encapsulation layer includes a first encapsulation layer 10 and a second encapsulation layer 11 which are arranged opposite to each other. The first encapsulation layer 10 is located between the junction box and the solar cell group 9. A third lead opening group is opened through the first encapsulation layer 10.
[0061] In other embodiments, the second packaging layer may be located between the junction box and the solar cell group; and a third lead opening group is provided through the second packaging layer.
[0062] In one embodiment, the photovoltaic assembly further comprises: a lead wire group, one end of which is connected to the solar cell group 9, and the other end of which passes through the third lead wire opening group, the second lead wire opening group and the lead wire opening group to be connected to the conductive transmission member.
[0063] Specifically, the solar cell group 9 includes a plurality of battery strings connected in series, and the plurality of battery strings connected in series are connected in parallel through a bus bar.
[0064] refer to Figure 5 The lead wire group includes a positive lead wire 12 and a negative lead wire 13, one end of the positive lead wire 12 is electrically connected to a part of the bus bars in the solar cell group 9, and the other end passes through the third positive lead wire port, the second positive lead wire port and the positive lead wire port to be connected to the positive electrode of the conductive transmission member; one end of the negative lead wire 13 is electrically connected to a part of the bus bars in the solar cell group 9, and the other end passes through the third negative lead wire port, the second negative lead wire port and the negative lead wire port to be connected to the negative electrode of the conductive transmission member.
[0065] The photovoltaic module further comprises: a packaging film; the packaging film is located between the solar cell group 9 and the packaging layer.
[0066] Specifically, refer to Figure 5The packaging film includes a first packaging film 14 and a second packaging film 15 which are arranged opposite to each other. The first packaging film 14 is located between the solar cell group 9 and the first packaging layer 10; the second packaging film 15 is located between the solar cell group 9 and the second packaging layer 11.
[0067] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.
Claims
1. A junction box, comprising a box body and a box cover, wherein the box body has a receiving cavity for arranging a conductive transmission member, and the box body has a box body side wall surrounding the receiving cavity, characterized in that: The side wall of the box body is provided with a first clamping structure; the box cover has a second clamping structure; When the box cover and the box body are relatively buckled, the first snap-fitting structure can be relatively snap-fitted with the second snap-fitting structure; one of the first snap-fitting structure and the second snap-fitting structure has a groove, and the other is a protrusion suitable for snapping with the groove; a first rubber strip that fits the inner wall of the groove is provided in the groove, and a snap-fitting seam is formed by the first rubber strip; the protrusion is the second rubber strip, or the surface of the protrusion is provided with the second rubber strip, and the second rubber strip is suitable for being inserted into the snap-fitting seam to form a snap-fitting seal with the first rubber strip.
2. The junction box according to claim 1, characterized in that: The first rubber strip includes a first sub-rubber strip and a second sub-rubber strip; the first sub-rubber strip and the second sub-rubber strip together form an axially symmetrical figure in the width direction of the groove, and the symmetry axis is the center line of the clamping seam; The cross-sectional shape of the first clamping structure includes two right triangles or right sectors that are axially symmetrical, and the axis of symmetry is the center line of the clamping seam; the cross-sectional shape of the second clamping structure includes a triangle or a sector, and the vertex of the triangle or the arcuate side of the sector is suitable for inserting into the clamping seam; The bottom ends of the first sub-strip and the second sub-strip are connected and arranged back to back; the cross-sectional shape of the first sub-strip includes an arc or a straight line; the cross-sectional shape of the second sub-strip includes an arc or a straight line; the cross-sectional shape of the second strip includes an arc or a "V" shape.
3. The junction box according to claim 1, characterized in that: The side wall of the box body comprises a first side wall and a second side wall which are arranged opposite to each other, and a third side wall and a fourth side wall which are arranged opposite to each other; the first side wall and the second side wall are both provided with a first clamping structure along the length direction of the box body; The box cover is movably connected to the box body; the box cover has a second clamping structure clamped with the first clamping structure; When the box cover and the box body are buckled relative to each other, one end of the box cover is suitable for penetrating the third side wall of the box body; The junction box further comprises: a telescopic structure, the telescopic structure penetrating a portion of the fourth side wall of the box body to control the telescopic movement of the box cover; The fourth side wall is provided with the first clamping structure along the width direction of the box body.
4. The junction box according to claim 1, characterized in that: The first clamping structure is provided at one end of the box body side wall facing away from the bottom plate of the box body; The box cover comprises a box cover body and the second clamping structure located in the edge area of the box cover body.
5. The junction box according to any one of claims 1 to 4, characterized in that: The depth of the groove is 2mm-4mm; the width of the groove is 1mm-4mm; The depth of the protrusion is 2mm-4mm; the width of the protrusion is 1mm-4mm.
6. The junction box according to any one of claims 1 to 4, characterized in that: It also includes: a sealant layer; the sealant layer is located inside the box body; the sealant layer fills the accommodating cavity and covers the conductive transmission component; The sealant layer includes a butyl rubber layer.
7. The junction box according to any one of claims 1 to 4, characterized in that: The first rubber strip includes a rubber strip or a butyl rubber strip; the second rubber strip includes a rubber strip or a butyl rubber strip.
8. A photovoltaic module, characterized in that: include: At least two junction boxes according to any one of claims 1 to 7; Photovoltaic panels; The junction box is located on the back side of the photovoltaic module; the box body has a lead opening group on the side facing away from the box cover; the lead opening group faces the photovoltaic module; A water-blocking gasket is located between the photovoltaic assembly and the junction box; the water-blocking gasket has a second lead-wire opening group arranged in a one-to-one correspondence with the lead-wire opening groups.
9. The photovoltaic module according to claim 8, characterized in that: The water-blocking gasket comprises a butyl rubber gasket, and the projection area of the water-blocking gasket on the surface of the photovoltaic module is greater than or equal to the projection area of the junction box on the surface of the photovoltaic module; The cross-sectional shape of the water-blocking gasket includes a rectangle; the length of the water-blocking gasket is 50mm-80mm; the width of the water-blocking gasket is 20mm-30mm; and the thickness of the water-blocking gasket is 1mm-2mm.
10. The photovoltaic module according to claim 8, characterized in that: The photovoltaic module comprises a solar cell group and a packaging layer located on at least one side of the solar cell group; a third lead opening group is provided through the packaging layer; the third lead opening group is arranged in one-to-one correspondence with the lead opening group and the second lead opening group; The photovoltaic assembly further comprises: a lead wire group, one end of which is connected to the solar cell group, and the other end of which passes through the third lead wire opening group, the second lead wire opening group and the lead wire opening group to be connected to the conductive transmission member; The photovoltaic module further comprises: a packaging film; the packaging film is located between the solar cell group and the packaging layer.