CN216356636U - Junction box and photovoltaic module - Google Patents
Junction box and photovoltaic module Download PDFInfo
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- CN216356636U CN216356636U CN202122583314.7U CN202122583314U CN216356636U CN 216356636 U CN216356636 U CN 216356636U CN 202122583314 U CN202122583314 U CN 202122583314U CN 216356636 U CN216356636 U CN 216356636U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The utility model discloses a junction box and a photovoltaic assembly, relates to the technical field of photovoltaics, and aims to solve the problem that bubbles are formed between the junction box and a laminating part, so that the junction box and the laminating part are not firmly installed. The junction box comprises a box body, a box cover, a conductive piece, an insulating medium and at least one hollow exhaust piece. The bottom of the box body is provided with at least one wiring hole, and the box cover is buckled with the box body together. The conductive piece is accommodated in the box body, and a gap is formed between the conductive piece and the corresponding position of the wiring hole. The insulating medium is accommodated in the box body and covers the conductive piece. The hollow exhaust piece is arranged in the box body and located on one side of the wiring hole, and the hollow exhaust piece is used for enabling the interior of the box body to be communicated with the outside. The utility model also provides a photovoltaic module. The photovoltaic module comprises a laminating piece, an adhesive and the junction box in the technical scheme. The laminate includes a back sheet connected to the bottom of the box by an adhesive.
Description
Technical Field
The utility model relates to the technical field of photovoltaics, in particular to a junction box and a photovoltaic module.
Background
At present, a junction box, a wire electrically connected with the junction box and a connector connected with the wire are generally utilized to realize the electrical connection and the electrical output of a plurality of photovoltaic modules.
The junction box generally includes a box body, a terminal block, a diode, and an insulating medium for sealing the terminal block and the diode. In the prior art, the bottom of the box body is of a closed plane structure, and two wiring holes used for connecting outgoing lines are formed in the bottom of the box body. Before actual use, the bottom of the box body is divided into a plurality of areas, then the adhesive is coated on each area by adopting a closed method, and then the box body and the back plate are bonded together by using the adhesive.
However, in actual installation, the areas are coated by a closed process, which may result in one or more areas that are not vented or that are not pushed outward beyond the adhesive. At this time, air bubbles may be formed between the junction box and the laminate, making the junction box and the laminate installed insecure. Due to this, the terminal block may be peeled off from the laminate, resulting in damage to the terminal block.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a junction box and a photovoltaic assembly, which are used for firmly bonding the junction box and a laminated part, preventing the junction box from falling off from the laminated part and further ensuring the quality of the junction box.
To achieve the above object, in a first aspect, the present invention provides a junction box. The junction box comprises a box body, a box cover, a conductive piece, an insulating medium and at least one hollow exhaust piece. The bottom of the box body is provided with at least one wiring hole, and the box cover is buckled with the box body together. The conductive piece is accommodated in the box body, and a gap is formed between the conductive piece and the corresponding position of the wiring hole. The insulating medium is accommodated in the box body and covers the conductive piece. The hollow exhaust piece is arranged in the box body and located on one side of the wiring hole, and the hollow exhaust piece is used for enabling the interior of the box body to be communicated with the outside.
Compared with the prior art, the junction box provided by the utility model has the advantages that before actual use, the bottom of the box body is divided into a plurality of areas, and the hollow exhaust piece and the wiring hole are respectively positioned in different areas. Namely, hollow exhaust pieces or wiring holes are distributed in each area. Next, an adhesive is applied in each of the above regions by a closed method. It should be understood that the "closed process" herein means that the path formed by the applied adhesive is a closed path. Because the cavity air discharge spare sets up in the inside of box body for make the inside and the external intercommunication of box body. Based on this, during actual use, air in each area can be exhausted through the hollow exhaust member or the wiring hole in the corresponding area. At this moment, can make box body bottom and lamination piece bonding more firm, avoid the terminal box to drop from the lamination piece, and then ensure that the terminal box is not damaged.
In one implementation, the bottom of the box body is divided into a first area and a second area, and boundary lines of the first area and the second area are closed boundary lines. At least one hollow exhaust piece is arranged in the first area, and each wiring hole is located in the second area.
Under the condition of adopting above-mentioned technical scheme, in the actual bonding process, the air that produces in the first region can be discharged through setting up at least one cavity air discharge member in the first region to avoid forming the bubble between the first region of box body bottom and the lamination piece. Similarly, air generated in the second region can be exhausted through the wiring holes arranged in the second region, so that air bubbles are prevented from being formed between the second region of the bottom of the box body and the laminated piece. Based on this, can avoid forming the bubble between the bottom of box body and the lamination piece, make the box body bottom and the more firm of lamination piece bonding, ensure that the terminal box is not damaged.
In one implementation, at least one hollow vent is provided in the first region, and each wiring hole and the at least one hollow vent are located in the second region.
Under the condition of adopting the technical scheme, the air generated in the second area can be discharged through the wiring hole and the hollow exhaust piece. At this moment, not only can accelerate the speed of air escape, improve work efficiency. At the same time, more air can be exhausted through the wiring holes and the hollow exhaust piece, and the gap between the junction box and the laminated piece is reduced or eliminated.
In one implementation mode, the bottom of the box body is divided into a first area, a second area and a third area, and boundary lines of the first area, the second area and the third area are all closed boundary lines. At least one hollow exhaust member is arranged in the first area, and at least one hollow exhaust member is arranged in the third area. Each wiring hole is located in the second region, or each wiring hole and at least one hollow vent member are located in the second region.
Under the condition of adopting the technical scheme, the bottom of the box body is divided into three areas, and each area is internally provided with a wiring hole or a hollow exhaust piece for exhausting air. On the one hand, when the three regions are closely adhered to the laminate, the junction box can be further securely attached to the laminate. On the other hand, when there is a gap between the junction box and the laminate bonded together, the insulating medium injected into the interior of the box body flows into the gap through the wiring holes until the entire region where the wiring holes are located is filled. Therefore, when the bottom of the case is divided into three regions and the terminal hole is located only in the second region, the insulating medium injected into the interior of the case flows into the gap of the second region only through the terminal hole. Compared with the prior art, the waste of the insulating medium is reduced.
In one implementation mode, the height of the hollow air vent is H1, the height of the box body is H2, and the height of the conductive piece is H3; wherein H3 < H1 < H2.
Under the condition of adopting the technical scheme, when the height of the insulating medium injected into the box body is equal to that of the hollow exhaust part, the insulating medium completely covers the conductive part in the box body. I.e. the insulating medium seals the conductive member. When the height of the insulating medium is larger than that of the hollow exhaust piece, all components in the box body are sealed by the insulating medium. Based on this, can prevent inside entering terminal box such as air, moisture and granule, and then avoid causing the pollution to the inside components and parts of box body to ensure that the working property of terminal box is not influenced. Then, the height of the hollow exhaust member is smaller than that of the box body. At this time, the box cover and the box body can be buckled, so that the junction box becomes a sealing element. Based on this, can further prevent air, moisture and granule etc. to get into inside the terminal box, guarantee that the working property of terminal box is not influenced.
In one implementation, the hollow vent is a hollow vent column.
In one implementation mode, when the cross section of the hollow exhaust piece is circular, the inner diameter of the hollow exhaust piece is R, and R is larger than or equal to 1mm and smaller than or equal to 3 mm.
By adopting the technical scheme, air can be smoothly discharged through the hollow exhaust piece, and meanwhile, the insulating medium seeped out through the hollow exhaust piece can be reduced, so that the waste of the insulating medium is reduced.
In one implementation, the junction box further includes a wire, and the conductive member includes a first connection terminal, a second connection terminal, and a diode. The first end of the first wiring terminal is electrically connected with the lead, the second end of the first wiring terminal is connected with the first end of the diode, and the second end of the diode is connected with the first end of the second wiring terminal. And/or the insulating medium is a silica gel insulating medium or a two-liquid mixed hardened gel insulating medium.
In a second aspect, the utility model also provides a photovoltaic module. The photovoltaic module comprises a laminating piece, an adhesive and the junction box in the technical scheme. The laminate includes a back sheet connected to the bottom of the box by an adhesive.
Compared with the prior art, the photovoltaic module provided by the utility model has the same beneficial effects as the junction box in the technical scheme, and the details are not repeated here.
In one implementation, after the back plate is connected with the bottom of the junction box through the adhesive, the adhesive forms an adhesive path at the bottom of the box body, and the adhesive path comprises a first adhesive path and at least one second adhesive path. The first bonding path covers a peripheral region of the bottom of the case body, and the at least one second bonding path is located within the first bonding path and covers a peripheral region of the wire connection hole. The first bonding path and the at least one second bonding path constitute a closed region. The binder is a silica gel binder or a two-liquid mixed hardened glue binder.
In one implementation, the bonding path includes a first bonding path and two second bonding paths. The cross section of the wiring hole is rectangular, and when the length direction of the wiring hole is perpendicular to the length direction of the box body, the length directions of the two second bonding paths are parallel to the length direction of the wiring hole.
Under the condition of adopting the technical scheme, on the premise of not influencing normal use, the area formed by the two second bonding paths and the first bonding path surrounding the wiring hole can be smaller than other areas. When there is a gap between the above-mentioned region and the laminate, there is less insulating medium flowing into the gap through the wiring hole, and thus waste of the insulating medium can be reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic view of the internal structure of a junction box according to an embodiment of the present invention;
FIG. 2 is a bottom view of FIG. 1 in an embodiment of the present invention;
FIG. 3 is a schematic view of a first bottom structure of the junction box in an embodiment of the utility model;
FIG. 4 is a schematic view of a second bottom structure of the junction box of the embodiment of the utility model;
FIG. 5 is a schematic view of a third bottom structure of the junction box in an embodiment of the utility model;
FIG. 6 is a schematic view of a fourth bottom structure of the junction box in an embodiment of the present invention;
FIG. 7 is a schematic view of a fifth bottom structure of the junction box in an embodiment of the utility model;
fig. 8 is a schematic view of a sixth bottom structure of the junction box in the embodiment of the utility model.
Reference numerals:
1-box body, 2-wiring hole, 3-conductive piece,
30-first connection, 31-second connection, 32-diode;
4-a hollow exhaust member, wherein the hollow exhaust member is arranged in the cavity,
5-a first region, 6-a second region, 7-a third region,
8-bond path, 80-first bond path, 81-second bond path.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
At present, a junction box, a wire electrically connected with the junction box and a connector connected with the wire are generally utilized to realize the electrical connection and the electrical output of a plurality of photovoltaic modules.
The junction box generally includes a box body, a terminal block, a diode, and an insulating medium for sealing the terminal block and the diode. In the prior art, the bottom of the box body is of a closed plane structure, and two wiring holes used for connecting outgoing lines are formed in the bottom of the box body. Before actual use, the bottom of the box body is divided into a plurality of areas, then the adhesive is coated on each area by adopting a closed method, and then the box body and the back plate are bonded together by using the adhesive.
However, in actual installation, the areas are coated by a closed process, which may result in one or more areas that are not vented or that are not pushed outward beyond the adhesive. At this time, air bubbles may be formed between the junction box and the laminate, making the junction box and the laminate installed insecure. Due to this, the terminal block may be peeled off from the laminate, resulting in damage to the terminal block.
In order to solve the above technical problem, in a first aspect, an embodiment of the present invention provides a junction box. Referring to fig. 1 and 2, the junction box includes a box body 1, a box cover (not shown in fig. 1 and 2), a conductive member 3, an insulating medium (not shown in fig. 1 and 2), and at least one hollow venting member 4. The bottom of the box body 1 is provided with at least one wiring hole 2, and the box cover is buckled with the box body 1. The conductive piece 3 is accommodated in the box body 1, and a gap is formed between the conductive piece 3 and the corresponding position of the wiring hole 2. The insulating medium is accommodated inside the case 1 and covers the conductive member 3. The hollow air discharge member 4 is provided inside the case body 1 and located at one side of the wiring hole 2 for communicating the inside of the case body 1 with the outside.
The junction box can be an integrated junction box or a split junction box. In the embodiment of the utility model, the junction box is a split junction box. The junction box shown in fig. 1 is only one of the split junction boxes.
The box body and the box cover can be assembled together by adopting connection modes such as clamping, hinging, magnetic attraction and the like. These connection means may be used alone or in combination in a conventional combination. In the embodiment of the utility model, the box body and the box cover have the advantages of high rigidity, high heat resistance, flame retardancy, high strength and the like. And, above-mentioned lid is inside to be provided with rubber seal, can be used for better sealed box body. In addition, the lid still has waterproof dustproof anti-pollution effect, can prevent inside entering terminal box (being the inside of box body) such as air, moisture and granule, and then avoids causing the pollution to electrically conductive etc. to ensure that the working property of terminal box is not influenced. The shape and size of the box body and the box cover can be set according to actual conditions, and are not limited specifically.
Referring to fig. 2, the number and the positions of the wiring holes 2 may be set according to practical situations, and are not particularly limited herein. In the embodiment of the utility model, the bottom of the box body 1 is provided with two wiring holes 2 with rectangular cross sections.
Referring to fig. 1 and 2, the terminal block according to the embodiment of the present invention is provided in which the bottom of the case body 1 is divided into a plurality of areas before actual use, and the hollow vent 4 and the wire connection hole 2 are respectively located in different areas. Namely, a hollow exhaust piece 4 or a wiring hole 2 is distributed in each area. Next, an adhesive is applied in each of the above regions by a closed method. It should be understood that the "closed process" herein means that the path formed by the applied adhesive is a closed path. Since the hollow air discharging member 4 is provided inside the case body 1 for communicating the inside of the case body 1 with the outside. Based on this, during actual use, air in each area can be exhausted through the hollow exhaust piece 4 or the wiring hole 2 in the corresponding area. At this moment, can make 1 bottom of box body and lamination piece bonding more firm, avoid the terminal box to drop from the lamination piece, and then ensure that the terminal box is not damaged.
As a possible implementation, referring to fig. 1 and 2, the conductive member 3 may include a first connection terminal 30, a second connection terminal 31, and a diode 32. The junction box also includes wires (not shown in fig. 1 and 2). Specifically, a first end of the first connection terminal 30 is electrically connected to the lead, a second end of the first connection terminal 30 is connected to a first end of the diode 32, and a second end of the diode 32 is connected to a first end of the second connection terminal 31. The conductive member 3 has a gap at a position corresponding to the wiring hole 2, that is, the first and second connection terminals 30 and 31 have a gap at a position corresponding to the wiring hole 2. At this time, the outgoing line of the photovoltaic module is connected with the first wiring terminal 30 and the second wiring terminal 31 through the wiring hole 2 and the gap. In practical applications, the lead-out wire may be a solder ribbon such as a bus bar. The solder strips may be connected directly to the battery strings. At this time, the solder strip serving as the outgoing line is led out from the photovoltaic module and then is soldered with the junction box. It should be understood that, when the technical solutions provided by the embodiments of the present invention are exemplarily described below, the lead wire concerned may be a solder strip such as a bus bar or an electrical structure meeting the requirements of the lead wire without specific description.
As a possible implementation manner, the insulating medium may be a silica gel insulating medium or a two-liquid mixed hardened gel insulating medium. It should be understood that the two-component hybrid cured adhesive is an AB adhesive. Of course, the insulating medium may be other materials suitable for practical use, and is not limited to the above description.
As a possible implementation, referring to fig. 3 to 6, when the junction box is bonded to the laminate, the bottom of the box body 1 may be divided into a plurality of different closed areas, and the positions and the number of the wiring holes 2 and the hollow exhausting members 4 arranged in each closed area are various. Four possible implementations are described below as examples, it being understood that the following description is for understanding only and is not intended to be limiting.
As an example, referring to fig. 3, the bottom of the case is divided into a first region 5 and a second region 6, and boundary lines of the first region 5 and the second region 6 are all closed boundary lines. At least one hollow venting member 4 is disposed in the first region 5, and each wiring hole 2 is located in the second region 6.
Referring to fig. 3, during the actual gluing process, the air generated in the first zone 5 can be evacuated through at least one hollow venting member 4 arranged in the first zone 5 to avoid the formation of air bubbles between the first zone 5 of the bottom of the box and the laminate. Similarly, air generated in the second region 6 can be discharged through the wiring holes 2 provided in the second region 6 to prevent air bubbles from being formed between the second region 6 of the bottom of the case and the laminate. Based on this, can avoid forming the bubble between the bottom of box body and the lamination piece, make the box body bottom and the more firm of lamination piece bonding, ensure that the terminal box is not damaged. Specifically, a hollow vent 4 may be provided in the first region 5, and all of the wiring holes 2 may be provided in the second region 6.
In the second example, referring to fig. 4, the bottom of the case is divided into a first region 5 and a second region 6, and the boundary lines of the first region 5 and the second region 6 are all closed boundary lines. At least one hollow vent 4 is provided in the first region 5, and each wiring hole 2 and at least one hollow vent 4 are located in the second region 6.
As a result, air generated in the second region 6 can escape not only through the connection opening 2, but also through the hollow venting member 4, see fig. 4. At this moment, not only can accelerate the speed of air escape, improve work efficiency. At the same time, more air can be exhausted through the wiring holes 2 and the hollow exhaust member 4, and the gap between the junction box and the laminated member is reduced or eliminated. Specifically, one hollow vent 4 may be provided in the first region 5, and one hollow vent 4 and all of the terminal holes 2 may be located in the second region 6.
In the third example, referring to fig. 5, the bottom of the cartridge body is divided into a first region 5, a second region 6, and a third region 7, and the borderlines of the first region 5, the second region 6, and the third region 7 are all closed borderlines. At least one hollow vent 4 is arranged in the first area 5, at least one hollow vent 4 is arranged in the third area 7, and each wiring hole 2 is positioned in the second area 6.
Referring to fig. 5, the bottom of the case is divided into three regions each having a terminal hole 2 or a hollow air discharging member 4 for discharging air. On the one hand, when the three regions are closely adhered to the laminate, the junction box can be further securely attached to the laminate. On the other hand, when there is a gap between the junction box and the laminate bonded together, the insulating medium injected into the interior of the box body flows into the gap through the wiring holes 2 until the entire region where the wiring holes 2 are located is filled. Therefore, when the bottom of the case is divided into three regions and the terminal hole 2 is located only in the second region 6, the insulating medium injected into the inside of the case flows into the gap of the second region 6 only through the terminal hole 2. Compared with the prior art, the waste of the insulating medium is reduced. Specifically, a hollow vent 4 may be disposed in the first region 5, all the wiring holes 2 are disposed in the second region 6, and a hollow vent 4 is disposed in the third region 7.
Fourth, referring to fig. 6, the bottom of the cartridge body is divided into a first area 5, a second area 6, and a third area 7, and the borderlines of the first area 5, the second area 6, and the third area 7 are all closed borderlines. At least one hollow vent 4 is arranged in the first area 5, at least one hollow vent 4 is arranged in the third area 7, and each wiring hole 2 and at least one hollow vent 4 are positioned in the second area 6.
Referring to fig. 6, at this time, the air discharge speed may be further increased, thereby improving the work efficiency. At the same time, more air can be exhausted through the wiring holes 2 and the hollow exhaust member 4, and the gap between the junction box and the laminated member is reduced or eliminated. Specifically, one hollow vent 4 may be provided in the first region 5, one hollow vent 4 and all the wiring holes 2 may be provided in the second region 6, and one hollow vent 4 may be provided in the third region 7.
As a possible implementation manner, the height of the hollow venting piece is H1, the height of the box body is H2, and the height of the conductive piece is H3; wherein H3 < H1 < H2.
When the height of the insulating medium injected into the box body is equal to that of the hollow exhaust part, the insulating medium completely covers the conductive part in the box body. I.e. the insulating medium seals the conductive member. When the height of the insulating medium is larger than that of the hollow exhaust piece, all components in the box body are sealed by the insulating medium. Based on this, can prevent inside entering terminal box such as air, moisture and granule, and then avoid causing the pollution to the inside components and parts of box body to ensure that the working property of terminal box is not influenced. Then, the height of the hollow exhaust member is smaller than that of the box body. At this time, the box cover and the box body can be buckled, so that the junction box becomes a sealing element. Based on this, can further prevent air, moisture and granule etc. to get into inside the terminal box, guarantee that the working property of terminal box is not influenced. Specifically, the hollow venting member may be 0.5mm to 1mm, such as 0.5mm, 07mm, 0.85mm or 1mm, from the lid.
As a possible implementation, the hollow exhaust member may be a hollow exhaust column. As for the shape of the hollow exhaust column, it may be set according to practical circumstances, and is not particularly limited herein.
As a possible realization mode, when the cross section of the hollow exhaust piece is in a circular ring shape, the inner diameter of the hollow exhaust piece is R, and R is more than or equal to 1mm and less than or equal to 3 mm. In this case, not only can the air be smoothly discharged through the hollow vent member, but also the insulating medium oozing out through the hollow vent member can be reduced. It is understood that R may be 1mm, 1.2mm, 2.3mm, 2.8mm or 3 mm.
In a second aspect, the embodiment of the utility model further provides a photovoltaic module. The photovoltaic module comprises a laminating piece, an adhesive and the junction box in the technical scheme. The laminate includes a back sheet connected to the bottom of the box by an adhesive.
The beneficial effects of the photovoltaic module provided by the embodiment of the utility model are the same as those of the junction box in the technical scheme, and are not repeated herein.
As a possible implementation, referring to fig. 3 to 8, after the back sheet is connected to the bottom of the junction box by the adhesive, the adhesive forms an adhesive path 8 at the bottom of the box body, and the adhesive path 8 includes a first adhesive path 80 and at least one second adhesive path 81. The first adhesion path 80 covers a peripheral region of the bottom of the case body, and at least one second adhesion path 81 is positioned in the first adhesion path 80 and covers a peripheral region of the wire-connecting hole 2. The first bonding path 80 and the at least one second bonding path 81 constitute a closed region. The binder is a silica gel binder or a two-liquid mixed hardened glue binder.
The positional relationship between the first bonding path and the second bonding path is various. Four possible implementations are described below as examples, it being understood that the following description is for understanding only and is not intended to be limiting.
Example one: referring to fig. 4, the bonding path includes a first bonding path 80 and a second bonding path 81. The cross section of the wiring hole 2 is rectangular, and when the length direction of the wiring hole 2 is perpendicular to the length direction of the case, the length direction of one second bonding path 81 is parallel to the length direction of the wiring hole 2.
Example two: referring to fig. 7, the bonding path includes a first bonding path 80 and a second bonding path 81. The cross section of the wiring hole 2 is rectangular, and when the length direction of the wiring hole 2 is perpendicular to the length direction of the case, the length direction of one second adhesion path 81 is perpendicular or approximately perpendicular to the length direction of the wiring hole 2.
In a third example, referring to fig. 6, the bonding path includes a first bonding path 80 and two second bonding paths 81. The cross section of the wiring hole 2 is rectangular, and when the length direction of the wiring hole 2 is perpendicular to the length direction of the case, the length directions of the two second bonding paths 81 are parallel to the length direction of the wiring hole 2. The area where the two second adhesion paths 81 and the first adhesion path 80 surround the terminal hole 2 may be formed smaller than other areas without affecting normal use. When there is a gap between the above-mentioned region and the laminate, there is less insulating medium flowing into the gap through the wiring hole 2, and thus waste of the insulating medium can be reduced.
Example four: referring to fig. 8, the bonding path includes a first bonding path 80 and two second bonding paths 81. The cross section of the wiring hole 2 is rectangular, and when the length direction of the wiring hole 2 is perpendicular to the length direction of the case, the length direction of one second adhesion path 81 is perpendicular or approximately perpendicular to the length direction of the wiring hole 2.
In the above four ways, the third example, not only can make the junction box and the laminated part connected more firmly, but also is most beneficial to saving insulating medium. It should be understood that the number of the hollow exhaust members in the above four modes can be set according to actual conditions, and is not particularly limited herein.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A junction box, comprising:
the box body is provided with at least one wiring hole at the bottom;
the box cover is buckled with the box body;
the conductive piece is accommodated in the box body, and a gap is formed between the conductive piece and the corresponding position of the wiring hole;
the insulating medium is accommodated in the box body and covers the conductive piece;
and the hollow exhaust piece is arranged in the box body and positioned on one side of the wiring hole, and is used for communicating the inside of the box body with the outside.
2. The junction box of claim 1, wherein a bottom of the box body is divided into a first area and a second area; the boundary lines of the first area and the second area are closed boundary lines;
at least one hollow exhaust piece is arranged in the first area;
each wiring hole is positioned in the second area; or, each wiring hole and at least one hollow vent piece are positioned in the second area.
3. The junction box of claim 1, wherein a bottom of the box body is divided into a first region, a second region, and a third region; boundary lines of the first area, the second area and the third area are all closed boundary lines;
at least one hollow exhaust member is arranged in the first area, and at least one hollow exhaust member is arranged in the third area;
each wiring hole is positioned in the second area; or, each wiring hole and at least one hollow vent piece are positioned in the second area.
4. The junction box of claim 1, wherein the height of said hollow venting member is H1, the height of said box body is H2, and the height of said conductive member is H3; wherein H3 < H1 < H2.
5. The junction box of claim 1, wherein the hollow vent is a hollow vent post.
6. The junction box of claim 1, wherein when the cross section of the hollow exhaust member is circular, the inner diameter of the hollow exhaust member is R, and R is greater than or equal to 1mm and less than or equal to 3 mm.
7. The junction box of claim 1, further comprising a wire; the conductive piece comprises a first wiring terminal, a second wiring terminal and a diode; the first end of the first wiring terminal is electrically connected with the lead, the second end of the first wiring terminal is connected with the first end of the diode, and the second end of the diode is connected with the first end of the second wiring terminal; and/or the presence of a gas in the gas,
the insulating medium is a silica gel insulating medium or a two-liquid mixed hardened gel insulating medium.
8. A photovoltaic module comprising a laminate, an adhesive and the junction box of any one of claims 1 to 7;
the laminate comprises a backsheet;
the back plate is connected with the bottom of the box body through the adhesive.
9. The photovoltaic module of claim 8, wherein the adhesive forms an adhesive path at the bottom of the box body after the backsheet is attached to the bottom of the junction box by the adhesive;
the bonding paths comprise a first bonding path and at least one second bonding path;
the first bonding path covers a peripheral area of the bottom of the case; at least one of the second bonding paths is located within the first bonding path and covers a peripheral region of the wire connection hole;
the first bonding path and at least one of the second bonding paths constitute a closed region;
the binder is a silica gel binder or a two-liquid mixed hardened glue binder.
10. The photovoltaic module of claim 9, wherein the bonding path comprises a first bonding path and two second bonding paths; the cross section of the wiring hole is rectangular, and when the length direction of the wiring hole is perpendicular to the length direction of the box body, the length directions of the two second bonding paths are parallel to the length direction of the wiring hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122583314.7U CN216356636U (en) | 2021-10-26 | 2021-10-26 | Junction box and photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122583314.7U CN216356636U (en) | 2021-10-26 | 2021-10-26 | Junction box and photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216356636U true CN216356636U (en) | 2022-04-19 |
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ID=81180505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122583314.7U Active CN216356636U (en) | 2021-10-26 | 2021-10-26 | Junction box and photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216356636U (en) |
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2021
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