Junction box and photovoltaic module and photovoltaic system thereof

Abstract

The embodiment of the utility model discloses a junction box and a photovoltaic module and a photovoltaic system thereof, the junction box comprises a box body, the box body comprises a side main body and a back main body which are connected, the side main body is provided with a side cavity communicated with the outside, and the back main body is provided with a back cavity communicated with the outside. The side cavity and the back cavity are respectively used for accommodating components which are connected and conducted with the photovoltaic panel; the box cover is mounted and matched with the box body so as to cover the side cavities and the back cavity; under the condition that the box body is installed on the photovoltaic panel, the side body is connected to the side edge of the photovoltaic panel, and the back body is connected to the back face of the photovoltaic panel. According to the junction box, the side main body of the box body is connected with the side edge of the photovoltaic panel, and the back main body of the box body is connected with the back surface of the photovoltaic panel, so that the connection area between the box body and the photovoltaic panel can be increased, and the connection reliability between the junction box and the photovoltaic panel can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building integrated photovoltaics, and in particular to a junction box, a photovoltaic module and a photovoltaic system. BACKGROUND

[0002] Building integrated photovoltaics (BIPV) uses photovoltaic modules as building components or building materials, making them part of the building and having power generation functions. BIPV can avoid occupying too much land resources, which is particularly important for urban buildings where land is expensive. BIPV converts solar energy into electricity, which can reduce outdoor integrated temperature and play a peak shaving role for the power grid, achieving building energy saving effects.

[0003] The junction box is used to connect with the lead-out wire of the photovoltaic module to play a role of guiding the electric energy generated by the photovoltaic module. In the related art, the back-mounted junction box is fixed on the back of the photovoltaic panel. Since the size of the back-mounted junction box along the thickness direction of the photovoltaic panel is large, the back-mounted junction box occupies a large space when the photovoltaic module is transported, and the transportation cost is high. The side-mounted junction box is fixed on the side of the photovoltaic panel. Since the bonding area between the side-mounted junction box and the side of the photovoltaic module is small, the bonding reliability is low. SUMMARY

[0004] One or more embodiments of the present application provide a junction box to solve or at least partially alleviate the problems of high transportation cost and low bonding reliability in the related art.

[0005] In a first aspect, the present application provides a junction box, which adopts the following technical solution:

[0006] A junction box comprises: a box body, the box body comprising a side body and a back body connected to each other, the side body having a side cavity communicating with the outside, the back body having a back cavity communicating with the outside, the side cavity and the back cavity being used to accommodate components connected to a photovoltaic panel; at least one box cover, the box cover being mounted and matched with the box body to cover the side cavity and the back cavity; under the condition that the box body is mounted on the photovoltaic panel, the side body is connected to the side of the photovoltaic panel, and the back body is connected to the back of the photovoltaic panel.

[0007] In some embodiments, the side cavity and the back cavity are connected to each other, the box body has an opening, the opening is located on the side of the box body away from the photovoltaic panel, and the opening enables the side cavity and the back cavity to communicate with the outside.

[0008] In some embodiments, the box body further comprises a stop wall disposed around the box body, the stop wall is spaced apart from the inner side surface of the box body, a gap is defined between the stop wall and the inner side surface, the box cover comprises a top wall and a side wall, the side wall is connected to the top wall around the box cover, and the side wall extends into the gap when the box cover is mounted on the box body.

[0009] In some embodiments, the box cover further comprises a protrusion connected to the side wall, the box body further comprises a matching part located on the inner side surface and / or the stop wall, the matching part is adapted to be engaged with the protrusion, so that the box cover is detachably connected to the box body.

[0010] In some embodiments, the box cover further comprises an extension plate connected to the top wall, the extension plate extends from the top wall towards the box body, the box body further has a sunken groove, the sunken groove is adapted to avoid the extension plate, the extension plate is located at the opening of the sunken groove when the box cover is mounted on the box body, the extension plate is spaced apart from the bottom surface of the sunken groove, the extension plate is spaced apart from the side surface of the sunken groove, and a pry opening is defined between the extension plate and the side surface of the sunken groove.

[0011] In some embodiments, the component comprises a diode and a conductive seat, the diode is accommodated in the side cavity, and the conductive seat is accommodated in the back cavity, the conductive seat is adapted to connect the photovoltaic panel and the diode.

[0012] In some embodiments, the back body has a through hole on the side facing the photovoltaic panel, the through hole is adapted to allow the lead wire of the photovoltaic panel to enter the back cavity, and the box body further comprises a plurality of buckles connected to the back body, the buckles are adapted to allow the conductive seat to be engaged and fixed to the back body.

[0013] In some embodiments, the box body further has a glue groove, the glue groove is opened on the surface of the box body that is in contact with the photovoltaic module, and the glue groove is adapted to accommodate glue.

[0014] In some embodiments, the junction box further comprises a cable and a terminal, the cable is adapted to connect the photovoltaic panel and the terminal, the terminal is adapted to electrically connect the photovoltaic panel with other photovoltaic panels, the box body further has a threading hole, the threading hole is opened on the end of the side body, and the threading hole is adapted to allow the cable to enter the side cavity.

[0015] In a second aspect of the present application, a photovoltaic module is provided, which adopts the following technical solution:

[0016] A photovoltaic module includes: a photovoltaic panel; a frame; the frame being disposed on the side of the photovoltaic panel; and a junction box as described above, the junction box being adhered to the photovoltaic panel, wherein the side body of the junction box is connected to the side of the photovoltaic panel, and the back body of the junction box is connected to the back of the photovoltaic panel.

[0017] A third aspect of this application provides a photovoltaic system employing the following technical solution:

[0018] A photovoltaic system includes: a photovoltaic module as described above; and a mounting component adapted to be connected to the photovoltaic module so that the photovoltaic module can be installed at the installation location.

[0019] Compared with related technologies, one or more embodiments of this application include at least one of the following beneficial technical effects:

[0020] (1) The side body of the box is connected to the side of the photovoltaic panel, and the back body of the box is connected to the back of the photovoltaic panel. This helps to increase the connection area between the box and the photovoltaic panel, thereby improving the connection reliability between the junction box and the photovoltaic panel.

[0021] (2) Compared to all components being housed in the back chamber, in this application, some components are housed in the side chamber and others are housed in the back chamber. This is beneficial to reduce the number of components in the back chamber, which in turn is beneficial to reduce the size of the back body along the thickness direction of the photovoltaic panel, thereby reducing the space occupied by the junction box and reducing transportation costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this application and are not intended to limit this application.

[0023] Figure 1 This is a front view of a junction box according to some embodiments of this application.

[0024] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0025] Figure 3 This is a perspective view of a junction box according to some embodiments of this application.

[0026] Figure 4 for Figure 3 Enlarged view of section B.

[0027] Figure 5 This is a top view of a junction box according to some embodiments of this application.

[0028] Figure 6 Side view of a junction box according to some embodiments of the present application.

[0029] Figure 7 Top view of a junction box and side junction box mounted to a photovoltaic panel according to some embodiments of the present application.

[0030] Figure 8 Top view of a junction box, side junction box and back junction box mounted to a photovoltaic panel according to some embodiments of the present application.

[0031] Figure 9 Side view of a photovoltaic module according to some embodiments of the present application.

[0032] Figure 10 Top view of a junction box and back junction box mounted to a photovoltaic panel according to some embodiments of the present application.

[0033] Figure 11 Front view of a junction box and back junction box mounted to a photovoltaic panel according to some embodiments of the present application.

[0034] Figure 12 Junction box and back junction box mounted to a photovoltaic panel according to some embodiments of the present application.

[0035] Figure 13 Bottom view of a box cover according to some embodiments of the present application.

[0036] Figure 14 Side view of a box cover according to some embodiments of the present application.

[0037] Figure 15 Another side view of a box cover according to some embodiments of the present application.

[0038] Figure 16 Perspective view of a box cover according to some embodiments of the present application.

[0039] Figure 17 Box cover mounted to a box body according to some embodiments of the present application.

[0040] Figure 18 Box cover mounted to a box body of a junction box of the related art.

[0041] Figure 19 Perspective view of a box cover according to some other embodiments of the present application.

[0042] Figure 20 Box cover mounted to a box body according to some other embodiments of the present application.

[0043] Figure 21 A cross-sectional view of a box cover mounted on a box body according to some embodiments of the present application.

[0044] Figure 22 A back view of a junction box according to some embodiments of the present application.

[0045] Figure 23 An internal view of a junction box according to some embodiments of the present application.

[0046] Figure 24 A schematic view of a photovoltaic panel according to some embodiments of the present application.

[0047] Figure 25 A cross-sectional view of a box cover mounted on a box body according to some embodiments of the present application. Figure 14 An enlarged view of part C.

[0048] In the figure: 1, junction box; 10, box body; 11, opening; 12, inner side; 13, stop wall; 14, gap; 15, fitting part; 16, side body; 161, side cavity; 162, threading opening; 17, back body; 171, back cavity; 172, sunken groove; 1721, prying opening; 173, through opening; 18, buckle; 19, glue groove; 20, box cover; 21, top wall; 22, side wall; 23, protruding part; 24, extension plate; 30, component; 31, diode; 32, conductive seat; 321, avoiding hole; 41, cable; 42, wire; 50, terminal; 60, tin block; 70, fixing part; 2, photovoltaic assembly; 80, photovoltaic panel; 81, lead wire of photovoltaic panel; 90, frame; 101, back-mounted junction box; 102, side-mounted junction box; 103, spacing pad. DETAILED DESCRIPTION

[0049] In order to make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings which show multiple embodiments according to the present application. It should be understood that the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments described in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort, shall fall within the scope of protection of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the use herein of terms such as "comprise", "comprising", "comprises", "include", "including", "includes", "have", "has", "having", "contain", "containing", "contains", "contain" and the like are to be understood exclusively as referring to the presence of those various introduced elements by indication of one or more of them by such terms, and are not to be interpreted as limiting of any particular number of introductions of those elements that can be so introduced, whether by the terms by which they are introduced or by other terminology.

[0051] In the description of the application, it should be understood that the orientation or positional relationship indicated by the terms "center", "transverse", "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0052] In the description of the application, it should be noted that unless otherwise defined and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0053] In the related art, the back-mounted junction box 101 is fixed to the back of the photovoltaic panel 80. Since the size of the back-mounted junction box 101 along the thickness direction of the photovoltaic panel 80 is large, the back-mounted junction box 101 occupies a large space when the photovoltaic module 2 is transported, and the transportation cost is high. The side-mounted junction box 102 is fixed to the side of the photovoltaic panel 80. Since the bonding area of the side-mounted junction box 102 and the side of the photovoltaic module 2 is small, the bonding reliability is low.

[0054] Figure 1 The schematic diagram of the junction box according to some embodiments of the application.

[0055] One or more embodiments of the application disclose a junction box 1. Referring to Figures 1 to 25The junction box 1 comprises a box body 10, the box body 10 comprising a side body 16 and a back body 17 connected to each other, the side body 16 having a side cavity 161 in communication with the outside, the back body 17 having a back cavity 171 in communication with the outside, the side cavity 161 and the back cavity 171 being used for accommodating the components 30 connected to the photovoltaic panel 80 respectively; at least one box cover 20, the box cover 20 being mounted and matched with the box body 10, so as to cover the side cavity 161 and the back cavity 171; a plurality of components 30, the components 30 being connected to the photovoltaic panel 80, part of the components 30 being accommodated in the side cavity 161, and the other part of the components 30 being accommodated in the back cavity 171; under the condition that the box body 10 is mounted on the photovoltaic panel 80, the side body 16 is connected to the side edge of the photovoltaic panel 80, and the back body 17 is connected to the back surface of the photovoltaic panel 80.

[0056] It should be understood that, in the related art, referring to Figure 7 and Figure 8 , the photovoltaic panel 80 is composed of two pieces of glass and a glue layer between the two pieces of glass, and the thickness of the photovoltaic panel 80 is about 14 mm. Since the corners of the glass are chamfered, and there may be a misalignment when the two pieces of glass are bonded, the side edges of the two pieces of glass are not coplanar, and thus the width of the side edge of the photovoltaic panel 80 is likely to be less than 14 mm. That is, the area available for bonding the side edge of the photovoltaic panel 80 to the side-mounted junction box 102 is small, and thus the bonding reliability of the side-mounted junction box 102 to the photovoltaic panel 80 is low, and even in the transportation process of the photovoltaic module 2, the side-mounted junction box 102 may fall off the photovoltaic panel 80.

[0057] In the embodiment, referring to Figures 3 to 8 , the side body 16 of the box body 10 is connected to the side edge of the photovoltaic panel 80, and the back body 17 of the box body 10 is connected to the back surface of the photovoltaic panel 80. That is, the side body 16 is bonded and fixed to the side edge of the photovoltaic panel 80, and the back body 17 is bonded and fixed to the back surface of the photovoltaic panel 80, which is conducive to increasing the connection area between the box body 10 and the photovoltaic panel 80, and thus improving the connection reliability between the junction box 1 and the photovoltaic panel 80, and avoiding the junction box 1 from falling off the photovoltaic panel 80.

[0058] It should be understood that, in the related art, referring to Figures 8 to 11, the size of the back-placed junction box 101 along the thickness direction of the photovoltaic panel 80 is about 15 mm, and the cable drawn from the back-placed junction box 101 is located at the back of the photovoltaic panel 80, which makes it difficult to hide the back-placed junction box 101 and the cable drawn from the back-placed junction box 101 in the frame 90 arranged at the side of the photovoltaic panel 80. That is, the cable 41 needs to be bent from the back of the photovoltaic panel 80 to the frame 90 for hiding, which increases the installation difficulty; or the size of the frame 90 along the thickness direction of the photovoltaic panel 80 needs to be enlarged to hide the back-placed junction box 101 in the frame 90, which increases the manufacturing cost of the frame 90.

[0059] In the embodiment, part of the components 30 are accommodated in the side chamber 161, and the other part of the components 30 are accommodated in the back chamber 171, which is beneficial to reduce the number of components 30 in the back chamber 171, and thus beneficial to reduce the size of the back body 17 along the thickness direction of the photovoltaic panel 80. That is, by accommodating part of the components 30 in the side chamber 161, part of the components 30 are located at the side of the photovoltaic panel 80, which is beneficial to reduce the space required by the back chamber 171, and thus beneficial to reduce the size of the back body 17 along the thickness direction of the photovoltaic panel 80. On the basis of hiding the back body 17 in the frame 90, the frame 90 has a smaller size along the thickness direction of the photovoltaic panel 80, which is beneficial to improve the appearance of the photovoltaic module 2 and reduce the manufacturing cost of the frame 90.

[0060] It is worth mentioning that reducing the size of the back body 17 along the thickness direction of the photovoltaic panel 80 is also beneficial to reduce the transportation cost. Specifically, referring to Figure 12 In the transportation process, in order to avoid interference between the junction box 1 on one photovoltaic module 2 and the photovoltaic panel 80 of the adjacent photovoltaic module 2, it is necessary to separate each photovoltaic module 2, for example, by arranging a spacing pad 103 between the photovoltaic panels 80 of adjacent photovoltaic modules 2. It should be understood that the thickness of the spacing pad 103 needs to be greater than or equal to the size of the junction box 1 along the thickness direction of the photovoltaic panel 80. In the embodiment, the size of the back body 17 of the box body 10 along the thickness direction of the photovoltaic panel 80 is small, which is beneficial to make the spacing between each photovoltaic module 2 smaller, and thus improve the space utilization of the packaging box.

[0061] In at least one embodiment, the dimension of the back body 17 of the box body 10 along the thickness direction of the photovoltaic panel 80 is about 6 mm. Specifically, if the width of the packaging box is 1 m, according to the above, the total thickness of the photovoltaic module 2 using the back-mounted junction box 101 is 14 mm + 15 mm, i.e. 29 mm, and one packaging box can accommodate 34 photovoltaic modules 2. The total thickness of the photovoltaic module 2 using the junction box 1 in the embodiment is 14 mm + 6 mm, i.e. 20 mm, and thus one packaging box can accommodate 50 photovoltaic modules 2, thereby improving the space utilization rate of the packaging box and reducing the cost of packaging and transportation of the photovoltaic module 2.

[0062] In some embodiments, referring to Figures 1 to 4 , the side chamber 161 and the back chamber 171 are connected, and the box body 10 has an opening 11 on the side of the box body 10 away from the photovoltaic panel 80, and the opening 11 allows the side chamber 161 and the back chamber 171 to communicate with the outside.

[0063] It can be understood that the part of the components 30 accommodated in the side chamber 161 and the other part of the components 30 accommodated in the back chamber 171 need to be connected. In the embodiment, the side chamber 161 and the back chamber 171 are connected to have a larger space for installing and fixing the components 30, welding and connecting, thereby reducing the installation difficulty of the components 30 and improving the installation efficiency of the junction box 1. Further, the opening 11 allows the side chamber 161 and the back chamber 171 to communicate with the outside, that is, the side chamber 161 and the back chamber 171 have a common opening, thereby reducing the processing difficulty of the box body 10 and facilitating the injection molding, cutting and other processing of the box body 10. In addition, the junction box 1 only needs one box cover 20 to cover the side chamber 161 and the back chamber 171, which is beneficial to reducing the types of parts of the junction box 1 and further reducing the manufacturing cost and assembly difficulty of the junction box 1.

[0064] It is worth mentioning that, as described above, referring to Figure 1 , the opening 11 is located on the side of the box body 10 away from the photovoltaic panel 80, that is, the opening 11 is hidden on the back of the photovoltaic panel 80, thereby facilitating the shielding effect of the photovoltaic panel 80 to avoid liquid and water vapor entering the side chamber 161 and the back chamber 171 from the opening 11, thereby improving the reliability and safety of the junction box 1. In addition, the opening 11 is located on the side of the box body 10 away from the photovoltaic panel 80, which is beneficial to avoiding the box cover 20 installed on the opening 11 from being attached to the back of the photovoltaic panel 80, thereby facilitating the removal of the box cover 20 during maintenance.

[0065] It is worth mentioning that the opening of the side chamber 161 and the opening of the back chamber 171 can also be arranged respectively, so that only the components 30 in the side chamber 161 or only the components 30 in the back chamber 171 are exposed during maintenance, which is beneficial to avoid exposing the components 30 that do not need to be maintained. In at least one embodiment, the opening of the side chamber 161 is located on the side of the side body 16 away from the side edge of the photovoltaic panel 80, and the opening of the back chamber 171 is located on the side of the back body 17 away from the photovoltaic panel 80. Further, the junction box 1 has two box covers 20 to cover the side chamber 161 and the back chamber 171 respectively. In at least one embodiment, the opening of the side chamber 161 is located on the side of the side body 16 facing the side edge of the photovoltaic panel 80, and the opening of the back chamber 171 is located on the side of the back body 17 away from the photovoltaic panel 80. Further, the opening of the side chamber 161 is arranged apart from the opening of the back chamber 171, and the junction box 1 has two box covers 20 to cover the side chamber 161 and the back chamber 171 respectively. The present application does not make specific limitations in this regard.

[0066] In some embodiments, referring to Figures 13 to 20 , the box body 10 further comprises a stop wall 13 arranged around the box body 10, the stop wall 13 is arranged apart from the inner side surface 12 of the box body 10, and a gap 14 is defined between the stop wall 13 and the inner side surface 12. The box cover 20 comprises a top wall 21 and a side wall 22, the side wall 22 is arranged around and connected to the top wall 21, and under the condition that the box cover 20 is installed on the box body 10, the side wall 22 extends into the gap 14 and is located between the stop wall 13 and the inner side surface 12.

[0067] That is, referring to Figure 17 and Figure 20 , the stop wall 13 and the inner side surface 12 of the box body 10 form a "concave" structure, and the top wall 21 and the side wall 22 of the box cover 20 form a "convex" structure, so that under the condition that the box cover 20 is installed on the box body 10, the side wall 22 of the box cover 20 is inserted between the stop wall 13 and the inner side surface 12. It should be understood that, referring to Figure 18 , if the stop wall 13 and the side wall 22 of the box cover 20 are not arranged, liquid and water vapor can enter the side chamber 161 or the back chamber 171 through the gap between the top wall 21 of the box cover 20 and the inner side surface 12 of the box body 10. In the present embodiment, referring to Figure 17 and Figure 20 , liquid and water vapor need to pass through the gap between the side wall 22 of the box cover 20 and the inner side surface 12 of the box body 10, and the gap between the side wall 22 of the box cover 20 and the stop wall 13 to enter the side chamber 161 or the back chamber 171, that is, the penetration path of water vapor is lengthened, which is beneficial to block water vapor from entering the side chamber 161 or the back chamber 171, thereby improving the reliability and safety of the junction box 1.

[0068] It is worth mentioning that, in the case that the opening of the side chamber 161 and the opening of the back chamber 171 are respectively arranged, the inner side surface 12 of the box body 10 comprises the inner side wall surface defining the side chamber 161 and the inner side wall surface defining the back chamber 171, and the stop wall 13 is arranged around the side chamber 161 and the back chamber 171 respectively. In the case that the side chamber 161 and the back chamber 171 are communicated and the side chamber 161 and the back chamber 171 are communicated with the outside through the opening 11, that is, in the case that the side chamber 161 and the back chamber 171 have a common opening, the inner side surface 12 of the box body 10 comprises the inner side wall surface defining the side chamber 161 and the back chamber 171.

[0069] In at least one embodiment, referring to Figures 13 to 20 , the communicated side chamber 161 and the back chamber 171 are "convex" in the thickness direction of the photovoltaic panel 80, the stop wall 13 arranged around is also "convex", and correspondingly, the side wall 22 of the box cover 20 is also "convex", so as to adapt the inner side surface 12 of the box body 10, the stop wall 13 and the side wall 22 of the box cover 20.

[0070] In at least one embodiment, in the case that the box cover 20 is installed on the box body 10, the side wall 22 of the box cover 20 extends to abut against the box body 10, thereby facilitating to improve the sealing between the box cover 20 and the box body 10, so as to reduce the risk of liquid, water vapor and the like entering the side chamber 161 and the back chamber 171.

[0071] In at least one embodiment, the side chamber 161 and the back chamber 171 are filled with a sealing body, which is beneficial to seal the component 30, thereby facilitating to avoid the influence or damage of liquid, water vapor and the like on the component 30. It can be understood that the sealing body includes but is not limited to silica gel and sealant.

[0072] In some embodiments, referring to Figures 14 to 20 , the box cover 20 further comprises a protruding portion 23 protrudingly connected to the side wall 22, and the box body 10 further comprises a matching portion 15 located on the inner side surface 12 and / or the stop wall 13, the matching portion 15 is adapted to be clamped with the protruding portion 23, so that the box cover 20 is detachably connected to the box body 10.

[0073] In at least one embodiment, referring to Figure 16 and Figure 17 , the cross section of the protruding portion 23 is arc-shaped, and the matching portion 15 is an arc-shaped groove concave inward, thereby facilitating the box cover 20 to be clamped with the box body 10 or removed from the box body 10.

[0074] In at least one embodiment, referring to Figure 19 and Figure 20The cross section of the protrusion 23 is wavy, and the cross section of the matching part 15 is also wavy, so that the matching part 15 is adapted to be connected to the protrusion 23, thereby improving the connection strength and reliability of the box cover 20 and the box body 10. It should be noted that the wavy protrusion 23 and the matching part 15 in the embodiment can further prolong the path of water vapor penetration, thereby further improving the reliability and safety of the junction box 1.

[0075] It should be understood that the cross section of the protrusion 23 can also be triangular, zigzag, etc., which is not limited in the present application.

[0076] In some embodiments, referring to Figure 16 , Figure 19 and Figure 21 , the box cover 20 further comprises an extension plate 24 connected to the top wall 21, the extension plate 24 extends from the top wall 21 towards the box body 10, and the box body 10 further has a sunken groove 172 which avoids the extension plate 24, under the condition that the box cover 20 is installed on the box body 10, the extension plate 24 is located at the opening of the sunken groove 172, the extension plate 24 is spaced apart from the bottom surface of the sunken groove 172, and the extension plate 24 is spaced apart from the side surface of the sunken groove 172, and a pry opening 1721 is defined between the extension plate 24 and the side surface of the sunken groove 172. It should be understood that referring to Figure 21 , the pry bar can extend into the sunken groove 172 from the pry opening 1721, so that the end of the pry bar is located below the extension plate 24, and the box cover 20 and the box body 10 can be separated by the force between the pry bar and the extension plate 24.

[0077] In at least one embodiment, referring to Figure 7 and Figure 8 , the side body 16 is coplanar with the side surface of the back body 17 facing away from the photovoltaic module 2, and the outer surface of the top wall 21 of the box cover 20 is coplanar with the side surface of the back body 17 facing away from the photovoltaic module 2 under the condition that the box cover 20 is installed on the box body 10, thereby making the outside of the junction box 1 more flat, and avoiding interference between the junction box 1 and other objects during transportation and installation of the photovoltaic module 2.

[0078] In some embodiments, referring to Figure 1The component 30 includes a diode 31 and a conductive seat 32. The diode 31 is accommodated in the side cavity 161, and the conductive seat 32 is accommodated in the back cavity 171. The conductive seat 32 is connected to the photovoltaic panel 80 and the diode 31. It should be understood that the diode 31 has a large diameter. If the diode 31 is arranged in the back cavity 171, the size of the back body 17 along the thickness direction of the photovoltaic panel 80 will be increased. In the embodiment, the diode 31 is arranged in the side cavity 161, which is beneficial to reduce the size of the back body 17 along the thickness direction of the photovoltaic panel 80. The conductive seat 32 is arranged in the back cavity 171, which is beneficial to improve the convenience of connecting the conductive seat 32 to the lead wire 81 of the photovoltaic panel.

[0079] It should be noted that the diode 31 is connected in parallel with the photovoltaic panel 80, which is beneficial to protect the photovoltaic system when the photovoltaic panel 80 generates hot spot effect.

[0080] In some embodiments, referring to Figure 22 The side of the back body 17 facing the photovoltaic panel 80 has a through hole 173. The through hole 173 is beneficial to make the lead wire 81 of the photovoltaic panel enter the back cavity 171. The box body 10 further includes a plurality of buckles 18 connected to the back body 17. The buckles 18 are beneficial to fix the conductive seat 32 to the back body 17.

[0081] It should be understood that the through hole 173 is located on the side of the back body 17 facing the photovoltaic panel 80, which is beneficial to make the lead wire 81 of the photovoltaic panel enter the back cavity 171 more conveniently, and avoid the need to bend and bypass the lead wire 81 of the photovoltaic panel to enter the back cavity 171. In addition, when the back body 17 is bonded to the back of the photovoltaic panel 80, the junction box 1 is beneficial to shield the lead wire 81 of the photovoltaic panel, which is beneficial to avoid the exposure of the lead wire 81 of the photovoltaic panel or reduce the length of the exposed lead wire 81 of the photovoltaic panel, thereby making the wiring of the photovoltaic module 2 more neat, improving the aesthetics of the photovoltaic module 2, and improving the reliability and safety of the photovoltaic module 2.

[0082] It should be noted that in the related art, the lead wire 81 of the photovoltaic panel connected to the side-mounted junction box 102 is close to the side of the photovoltaic panel 80, which may have the risk of creeping. In addition, the lead wire 81 of the photovoltaic panel connected to the side-mounted junction box 102 is close to the external environment, which has a higher risk of water vapor corrosion and oxidation. In the embodiment, referring to Figure 24 and Figure 25, the lead wire 81 of the photovoltaic panel can be led out from the back of the photovoltaic panel 80 and enter the back cavity 171 of the back body 17 through the through hole 173, which is conducive to increasing the distance between the lead wire 81 of the photovoltaic panel and the side of the photovoltaic panel 80, that is, to have a larger creepage distance, thereby facilitating the photovoltaic module 2 to meet the IEC requirements and improving the reliability and safety of the photovoltaic module 2.

[0083] It is worth mentioning that, compared with the conductive seat 32 being bonded to the back body 17, the bonding glue can increase the occupied space by raising the conductive seat 32. In the embodiment, referring to Figure 2 and Figure 4 , the conductive seat 32 is clamped to the back body 17 by the buckle 18, which can further reduce the installation height of the conductive seat 32 on the basis of ensuring reliable connection of the conductive seat 32 and the box body 10, thereby facilitating reduction of the size of the back body 17 along the thickness direction of the photovoltaic panel 80.

[0084] In at least one embodiment, referring to Figure 4 , the cross section of the buckle 18 is triangular, which is conducive to improving the reliability of the clamping of the conductive seat 32 to the box body 10.

[0085] In some embodiments, under the condition that the conductive seat 32 is installed on the back body 17, the conductive seat 32 shields part of the through hole 173, that is, the conductive seat 32 at least partially overlaps the through hole 173, thereby making the structure of the junction box 1 more compact and facilitating reduction of the overall volume of the junction box 1. It can be understood that, before the conductive seat 32 is installed, the through hole 173 has a larger size to facilitate the lead wire 81 of the photovoltaic panel to pass through, and after the conductive seat 32 is installed, the lead wire 81 of the photovoltaic panel can pass through the part of the through hole 173 that is not shielded.

[0086] In at least one embodiment, referring to Figure 2 and Figure 4 , the conductive seat 32 has an avoiding hole 321, and thereby the lead wire 81 of the photovoltaic panel can pass through the through hole 173 and the avoiding hole 321 in sequence and be connected and conducted with the conductive seat 32.

[0087] In at least one embodiment, the thickness of the conductive seat 32 is less than 1 mm, which is conducive to reducing the thickness of the back body 17 of the box body 10.

[0088] In some embodiments, referring to Figure 2 and Figure 4 , the lead wire 81 of the photovoltaic panel and the conductive seat 32 are connected and conducted by the tin block 60, thereby reducing the occupied space on the basis of ensuring reliable connection and conduction of the lead wire 81 of the photovoltaic panel and the conductive seat 32, and thereby facilitating reduction of the thickness of the back body 17 of the box body 10.

[0089] In at least one embodiment, the thickness of the tin block 60 is less than 1 mm, which is conducive to reducing the thickness of the back body 17 of the box body 10.

[0090] In some embodiments, referring to Figure 1 and Figure 3 , the junction box 1 further comprises a cable 41 and a terminal 50, the cable 41 is connected to the photovoltaic panel 80 and the terminal 50, the terminal 50 is used to electrically connect the photovoltaic panel 80 with other photovoltaic panels 80, and the box body 10 further has a threading opening 162, which is arranged at the end of the side body 16 and is used to allow the cable 41 to enter the side chamber 161. It is worth mentioning that the end of the side body 16 refers to the two ends of the side body 16 which are oppositely arranged along the extension direction of the side edge of the photovoltaic panel 80.

[0091] In the related art, the cable drawn out from the back-mounted junction box 101 needs to be bent from the back of the photovoltaic panel 80 into the frame 90 for hiding, which results in increased installation difficulty. In the present embodiment, the cable 41 is drawn out from the end of the side body 16, which is conducive to allowing the cable 41 to naturally extend in a direction parallel to the side edge of the photovoltaic panel 80, so as to directly hide the cable 41 in the frame 90, thereby not only making the wiring of the photovoltaic module 2 more neat and being conducive to improving the aesthetics of the photovoltaic module 2, but also protecting the cable 41 by the frame 90, thereby improving the reliability and safety of the photovoltaic module 2.

[0092] In at least one embodiment, the diameter of the cable 41 is about 6 mm, so that a threading opening 162 with a size greater than 6 mm is needed to allow the cable 41 to pass through and fix the cable 41. It can be understood that if the cable 41 is drawn out from the back body 17, the size of the back body 17 along the thickness direction of the photovoltaic panel 80 needs to be greater than 6 mm. In the present embodiment, the cable 41 is drawn out from the end of the side body 16, so that the threading opening 162 is arranged at the end of the side body 16, thereby being conducive to avoiding the influence of the cable 41 on the size of the back body 17.

[0093] In some embodiments, referring to Figure 2 and Figure 4 , the junction box 1 further comprises a fixing member 70, which is fixed to the back body 17 and is located beside the conductive seat 32 to fix the wire 42. Specifically, the wire 42 is used to connect the conductive seat 32, the cable 41 and the diode 31, and the wire 42 and the lead 81 of the photovoltaic panel are connected and conducted through the tin block 60 and the conductive seat 32. The fixing member 70 is of a ring-shaped opening structure, which is used to clamp and fix the wire 42, thereby being conducive to avoiding the wire 42 from moving or being pulled during transportation and installation, and further improving the reliability of the connection and conduction between the wire 42 and the conductive seat 32.

[0094] In at least one embodiment, referring to Figure 4 The fixing member 70 is integrally formed on the conductive seat 32, so that the structure of the junction box 1 is more compact.

[0095] In some embodiments, referring to Figure 22 The box body 10 also has a glue groove 19, which is formed on the surface of the box body 10 that is attached to the photovoltaic module 2, and the glue groove 19 can accommodate glue, thereby improving the bonding strength and reliability of the box body 10 and the photovoltaic panel 80. It should be understood that the surface of the box body 10 that is attached to the photovoltaic module 2 includes the outer surface of the side body 16 facing the side edge of the photovoltaic panel 80, and the outer surface of the back body 17 facing the back surface of the photovoltaic panel 80.

[0096] It is worth mentioning that the glue contained in the glue groove 19 also plays a role in slowing down the penetration of water vapor, thereby helping to avoid water vapor entering the back cavity 171 from the through hole 173 on the back body 17. In at least one embodiment, the glue groove 19 is arranged around the periphery of the surface of the back body 17 that is attached to the photovoltaic module 2. In at least one embodiment, the glue groove 19 is arranged on the surface of the back body 17 that is attached to the photovoltaic module 2 and is located on the outer peripheral side of the through hole 173.

[0097] One or more embodiments of the present application also disclose a photovoltaic module 2. The photovoltaic module 2 comprises: a photovoltaic panel 80; a frame 90 arranged on the side edge of the photovoltaic panel 80; and the above-mentioned junction box 1, which is bonded to the photovoltaic panel 80, wherein the side body 16 of the junction box 1 is connected to the side edge of the photovoltaic panel 80, and the back body 17 of the junction box 1 is connected to the back surface of the photovoltaic panel 80.

[0098] It should be understood that if the spacing pad 103 clamped between the photovoltaic modules 2 adopts a material with a smaller density, such as foam, there may be a situation that the spacing pad 103 is deformed by extrusion during transportation, thereby causing the photovoltaic modules 2 to be skewed, so that more care is needed during transportation of the photovoltaic modules 2, or a special packaging method is used. If the spacing pad 103 clamped between the photovoltaic modules 2 adopts a material with a larger density, due to the larger size of the junction box in the related art along the thickness direction of the photovoltaic panel 80, thereby causing the weight of the spacing pad 103 to be larger, if the photovoltaic modules 2 are placed vertically, it is difficult to clamp the spacing pad 103 by the friction force between the photovoltaic modules 2 and the spacing pad 103, thereby there is a risk of sliding of the spacing pad 103.

[0099] In the embodiment, the back body 17 of the junction box 1 has a small size along the thickness direction of the photovoltaic panel 80, and the required spacing pad 103 is thin, which is beneficial to reduce the volume of the spacing pad 103, and further beneficial to reduce the weight of the spacing pad 103. On the basis of clamping the spacing pad 103 by the friction force between the photovoltaic module 2 and the spacing pad 103, the spacing pad 103 made of a material with a large density can be used, which is further beneficial to avoid the deformation of the spacing pad 103 caused by extrusion during transportation, and the photovoltaic module 2 can be packaged in a relatively simple manner, which is further beneficial to improve the convenience of the photovoltaic module 2 transportation and reduce the cost of the photovoltaic module 2 transportation.

[0100] One or more embodiments of the present application also disclose a photovoltaic system. The photovoltaic system comprises the photovoltaic module 2 described above; and a mounting assembly adapted to be connected to the photovoltaic module 2, so that the photovoltaic module 2 is installed at a to-be-installed place. It can be understood that the to-be-installed place includes but is not limited to the wall surface, roof, carport, handrail panel of a building.

[0101] The above describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above-described embodiments, and the above-described embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A junction box, characterized in that, include: The housing includes a connected side body and a back body. The side body has a side chamber communicating with the outside, and the back body has a back chamber communicating with the outside. The side chamber and the back chamber are respectively used to accommodate components that connect to the photovoltaic panel. At least one lid, which is fitted to the box body to cover the side chamber and the back chamber; With the box body installed on the photovoltaic panel, the side body is connected to the side of the photovoltaic panel, and the back body is connected to the back of the photovoltaic panel.

2. The junction box as described in claim 1, characterized in that, The side chamber and the back chamber are connected, and the box body has an opening located on the side of the box body away from the photovoltaic panel, so that the side chamber and the back chamber can communicate with the outside.

3. The junction box as described in claim 1, characterized in that, The box body further includes a surrounding stop wall, the stop wall being spaced apart from the inner side of the box body, and a gap defining the stop wall and the inner side. The box cover includes a top wall and a side wall, the side wall being connected to the top wall in a surrounding manner. When the box cover is installed on the box body, the side wall extends into the gap, so as to be located between the stop wall and the inner side.

4. The junction box as described in claim 3, characterized in that, The lid also includes a protrusion that is protrudingly connected to the side wall. The box body also includes a mating part located on the inner side and / or the stop wall. The mating part is adapted to engage with the protrusion so that the lid can be detachably connected to the box body.

5. The junction box as described in claim 3, characterized in that, The lid also includes an extension plate connected to the top wall. The extension plate extends from the top wall toward the box body. The box body also has a recessed groove that avoids the extension plate. When the lid is installed on the box body, the extension plate is located at the opening of the recessed groove. The extension plate is spaced apart from the bottom surface of the recessed groove and spaced apart from the side surface of the recessed groove, so that a pry opening is defined between the side surface of the extension plate and the side surface of the recessed groove.

6. The junction box as described in any one of claims 1-5, characterized in that, The components include a diode and a conductive base. The diode is housed in the side chamber, and the conductive base is housed in the back chamber. The conductive base connects the photovoltaic panel and the diode.

7. The junction box as described in claim 6, characterized in that, The back body has a through-hole on the side facing the photovoltaic panel, which allows the photovoltaic panel's lead wire to enter the back cavity. The box also includes several buckles connected to the back body, which allow the conductive base to be snapped and fixed to the back body.

8. The junction box as described in any one of claims 1-5, characterized in that, The box also has an adhesive groove, which is formed on the surface of the box that is in contact with the photovoltaic module, and the adhesive groove can hold adhesive.

9. The junction box as described in any one of claims 1-5, characterized in that, The junction box also includes cables and terminals, the cables connecting the photovoltaic panel and the terminals, the terminals enabling the photovoltaic panel to conduct electricity with other photovoltaic panels, and the box body having a wire-passing opening located at the end of the side body, the wire-passing opening allowing the cable to enter the side cavity.

10. A photovoltaic module, characterized in that, include: Photovoltaic panels; The frame is disposed on the side of the photovoltaic panel; as well as The junction box as described in any one of claims 1-9 is adhered to the photovoltaic panel, wherein the side body of the junction box is connected to the side of the photovoltaic panel, and the back body of the junction box is connected to the back of the photovoltaic panel.

11. A photovoltaic system, characterized in that, include: The photovoltaic module as described in claim 10; as well as Installation components are adapted to and connected to the photovoltaic module, enabling the photovoltaic module to be installed at the installation location.

Images