Photovoltaic module junction box
By setting up a heat-insulating groove at the bottom of the junction box and using a heat sink, the problem of poor heat dissipation effect of the junction box is solved, effective heat dissipation and heat insulation of the photovoltaic module are achieved, and reverse leakage current is reduced.
Patent Information
- Application Number
- CN202422295545.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The existing junction box has poor heat dissipation effect, and the heat of the photovoltaic module easily enters the junction box, resulting in increased reverse leakage current.
An insulation groove is set at the bottom of the junction box body to form a heat dissipation channel between the junction box body and the surface of the photovoltaic module, and heat dissipation parts and insulation parts with high thermal conductivity are used to reduce the heat transferred from the photovoltaic module to the junction box.
The heat dissipation effect of the junction box is improved, the heat from the photovoltaic modules entering the junction box is reduced, the reverse leakage current is reduced, and good heat dissipation and heat insulation effects are achieved.
Smart Images
Figure CN223451927U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photovoltaic technology field especially is related to a photovoltaic module junction box. BACKGROUND
[0002] The photovoltaic module is the core part in solar power generation system, and its role is to convert solar energy into electric energy. The junction box on the photovoltaic module is provided with a diode, when the diode is subjected to high temperature effect, PN junction capacitor changes, resulting in reverse leakage current increase.
[0003] In actual use, it is found that the heat transferred to the junction box is not only the heat dissipated by the diode, but also the heat dissipated by the photovoltaic module itself when generating electricity. The structure of the existing junction box only considers the heat dissipated by the diode, but ignores the fact that the photovoltaic module itself also generates heat. The heat dissipation structure of the existing junction box not only fails to achieve good heat dissipation effect, but also easily allows the heat dissipated by the photovoltaic module to enter the junction box, which has the opposite effect.
[0004] Therefore, how to improve the heat dissipation effect of the junction box has become a technical problem to be solved by the technical personnel in the field. CONTENT OF THE UTILITY MODEL
[0005] The utility model aims at providing a photovoltaic module junction box to solve the technical problem of poor heat dissipation effect of the junction box in the prior art.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0007] A photovoltaic module junction box, comprising a junction box body and a diode arranged in the junction box body, a heat insulation groove is arranged at the bottom of the junction box body corresponding to the position of the diode, and the heat insulation groove forms a heat dissipation channel between the junction box body and the surface of the photovoltaic module.
[0008] Further, the heat insulation groove is arranged through the bottom of the junction box body, so that the heat insulation groove has an entrance and exit communicating with the outside air.
[0009] Further, the heat insulation groove is in the shape of a cross, comprising a first extension part and a second extension part arranged in cross, wherein: the first extension part extends along the length direction of the junction box body and penetrates through the junction box body; the second extension part extends along the width direction of the junction box body and penetrates through the junction box body.
[0010] Further, the bottom of the junction box body is provided with a wiring port for leading wires to extend into the inside, and the wiring port is located at the intersection position of the first extension part and the second extension part.
[0011] The bottom of the wire box body is further provided with an annular partition plate arranged around the peripheral portion of the wire port.
[0012] Further, the heat insulation groove is provided with a heat dissipation piece.
[0013] Further, the heat dissipation piece is an aluminum sheet or a copper sheet, and the heat dissipation piece is attached to the groove bottom surface of the heat insulation groove.
[0014] Further, the heat dissipation piece is provided with a mounting hole, and the groove bottom surface of the heat insulation groove is provided with a clamping block structure matched with the mounting hole.
[0015] Further, the bottom of the wire box body is located at the position of the heat insulation groove, and the groove bottom of the heat insulation groove is provided with a plurality of heat dissipation through holes.
[0016] Further, the bottom of the wire box body is provided with a heat insulation piece.
[0017] Further, the bottom surface of the outer side of the wire box body is concavely provided with a limiting groove, and the heat insulation piece is arranged in the limiting groove.
[0018] The heat insulation groove is located between the limiting groove and the bottom plate of the wire box body, and the heat insulation groove and the limiting groove are connected in a stepped manner.
[0019] The utility model discloses beneficial effect:
[0020] The utility model provides a photovoltaic module wire box includes wire box body and the diode of setting in wire box body, and the bottom of wire box body is provided with heat insulation groove in the position of diode, and heat insulation groove makes the surface between wire box body and photovoltaic module form heat dissipation passage. The above setting, on the one hand makes the heat dissipation passage between wire box body and photovoltaic module, is favorable to the circulation of air between both, thereby promotes the heat dissipation effect, on the other hand, the setting of heat insulation groove reduces the contact area of wire box body and photovoltaic module, and then reduces the heat that photovoltaic module directly transmits to wire box. Therefore, the wire box provided in the application can well dissipate the heat of diode, and can also reduce the heat transmitted to the wire box by the photovoltaic module, and has the advantages of heat dissipation and heat insulation. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.
[0022] Figure 1The assembling schematic view of the junction box of the photovoltaic module is provided for the embodiments of the utility model.
[0023] Figure 2 The explosion schematic view of the junction box of the photovoltaic module is provided for the embodiments of the utility model.
[0024] Figure 3 For Figure 2 The enlarged view at A.
[0025] Icon:
[0026] 1 - junction box body; 11 - heat insulation groove; 12 - heat dissipation through hole; 13 - limiting groove; 14 - clamping block structure; 15 - wiring port; 16 - annular partition; 2 - heat dissipation piece; 21 - mounting hole; 3 - heat insulation piece. DETAILED DESCRIPTION
[0027] The technical scheme of the utility model will be described clearly and completely below in combination with embodiments, and obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the protection scope of the utility model.
[0028] It should be noted that in the description of the utility model, the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0029] It should be noted that in the description of the utility model, the terms "connection" and "installation" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; It can be directly connected, or connected through an intermediate medium; It can be mechanically connected, or electrically connected. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.
[0030] The existing junction box only considers the heat dissipated by the diode when designing, but ignores the fact that the photovoltaic module itself also generates heat, resulting in poor heat dissipation effect of the junction box.
[0031] Based on this, the utility model provides a kind of photovoltaic module junction box, refer to Figure 1The photovoltaic module junction box comprises a junction box body 1 and a diode arranged in the junction box body 1, and a heat insulation groove 11 is arranged at the bottom of the junction box body 1 corresponding to the position of the diode, so that a heat dissipation channel is formed between the junction box body 1 and the surface of the photovoltaic module.
[0032] The bottom of the junction box body 1 is not completely attached to the surface of the photovoltaic module after being mounted on the photovoltaic module, but a semi-sealed structure is formed between the junction box body 1 and the surface of the photovoltaic module through the heat insulation groove 11. This arrangement, on the one hand, forms a heat dissipation channel (i.e. the heat insulation groove 11) between the junction box body 1 and the photovoltaic module, which is beneficial to the circulation of air between the two, thereby improving the heat dissipation effect; on the other hand, the arrangement of the heat insulation groove 11 avoids direct contact of the diode region with the photovoltaic module, reduces the contact area between the junction box body 1 and the photovoltaic module, and further reduces the heat directly transferred from the photovoltaic module to the junction box. Therefore, the junction box provided by the present application can not only dissipate the heat of the diode well, but also reduce the heat transferred from the photovoltaic module to the junction box, and has the advantages of heat dissipation and heat insulation.
[0033] Continuing to refer to Figure 1 , the heat dissipation piece 2 is arranged in the heat insulation groove 11. The heat dissipation piece 2 is made of a material with high thermal conductivity, which can quickly reflect the heat transferred from the diode to the junction box, thereby further improving the heat dissipation effect of the junction box.
[0034] In this embodiment, the heat dissipation piece 2 is an aluminum sheet or a copper sheet, and the heat dissipation piece 2 is attached to the groove bottom surface of the heat insulation groove 11, so that the heat of the junction box body 1 can be directly transferred to the heat dissipation piece 2.
[0035] Continuing to refer to Figure 1 , the bottom of the junction box body 1 is provided with a heat insulation piece 3. The heat insulation piece 3 is made of foam or fiber material, and the heat insulation is achieved by utilizing the pores contained in the foam or fiber material itself to reduce the heat transferred from the photovoltaic module to the junction box.
[0036] On the basis of the above structure, the heat insulation piece 3 covers the slot opening of the heat insulation groove 11. The heat dissipation piece 2 and the heat insulation piece 3 are arranged in parallel and spaced apart, and a heat dissipation channel for air circulation is formed therebetween. In the above structure, the heat dissipation piece 2 can quickly dissipate the heat of the diode through the heat dissipation channel, and the heat dissipation channel and the heat insulation piece 3 form two layers of heat insulation layers, which can avoid the heat of the photovoltaic module from being transferred to the diode region, thereby effectively improving the heat dissipation effect of the junction box.
[0037] Referring to Figure 2 , in this embodiment, the heat insulation groove 11 is arranged through the bottom of the junction box body 1, so that the heat insulation groove 11 has an inlet and an outlet in communication with the outside air.
[0038] Specifically, the heat insulation groove 11 is in a cross shape, which comprises a first extending part and a second extending part arranged in a cross manner, wherein: the first extending part extends along the length direction of the terminal box body 1 and penetrates the terminal box body 1; the second extending part extends along the width direction of the terminal box body 1 and penetrates the terminal box body 1.
[0039] The above arrangement makes the heat insulation groove 11 have multiple entrances and exits in communication with the external air, further improving the heat dissipation efficiency of the terminal box.
[0040] On the basis of the above structure, the heat dissipation member 2 is in a cross shape matching the shape of the heat insulation groove 11. The heat dissipation member 2 and the heat insulation groove 11 are both in a cross configuration, which can limit the relative position of the two in the horizontal direction.
[0041] As an optional embodiment, the groove bottom of the heat insulation groove 11 is provided with a plurality of heat dissipation through holes 12. The heat dissipation through holes 12 can make the heat in the terminal box body 1 be transmitted to the heat dissipation member 2 more quickly.
[0042] In this embodiment, a plurality of heat dissipation through holes 12 are arranged along the length direction of the first extending part and along the length direction of the second extending part, respectively.
[0043] Continuing to refer to Figure 2 , the bottom surface of the terminal box body 1 outside is concavely provided with a limiting groove 13, and the heat insulation member 3 is arranged in the limiting groove 13; the heat insulation groove 11 is located between the limiting groove 13 and the bottom plate of the terminal box body 1, and the heat insulation groove 11 and the limiting groove 13 are connected in a stepped manner.
[0044] After the terminal box is installed on the photovoltaic module, the heat insulation member 3 is clamped between the groove bottom surface of the limiting groove 13 and the photovoltaic module, without the need for other fixing structures. The heat insulation groove 11 and the limiting groove 13 are connected in a stepped manner, that is, the groove opening of the heat insulation groove 11 is connected with the groove bottom surface of the limiting groove 13; the heat dissipation member 2 is attached to the groove bottom surface of the heat insulation groove 11, the heat insulation member 3 is arranged in the limiting groove 13, and the heat dissipation member 2 and the heat insulation member 3 are arranged in parallel and spaced apart, and a heat dissipation channel for air circulation is formed between the two.
[0045] Continuing to refer to Figure 2 , the bottom of the terminal box body 1 is provided with a wiring port 15 for the lead wire to extend into the inside, and the wiring port 15 is located at the intersection position of the first extending part and the second extending part. The bottom of the terminal box body 1 is also provided with an annular partition plate 16 arranged around the peripheral part of the wiring port 15, which can avoid the exposure of the lead wire.
[0046] On the basis of the above structure, the heat dissipation member 2 and the heat insulation member 3 are both provided with through holes for the annular partition plate 16 to pass through.
[0047] In the embodiment, the bottom of the terminal box body 1 forms four mounting feet distributed around the terminal port 15. When the terminal box is installed, the terminal box is fixed on the photovoltaic module through glue between the mounting feet and the photovoltaic module. Any two adjacent mounting feet are separated by the heat insulation groove 11, so that an air flow channel that can pass through four ways is formed between the terminal box and the photovoltaic module. The air flow channel can quickly dissipate the heat of the diode and the air in the air flow channel can also have a good heat insulation effect, so as to avoid the heat of the photovoltaic module from being transmitted to the diode area.
[0048] With reference to Figure 2 and Figure 3 , the heat dissipation piece 2 is provided with mounting holes 21, and the groove bottom surface of the heat insulation groove 11 is provided with a clamping block structure 14 matched with the mounting holes 21. The heat dissipation piece 2 is matched with the terminal box body 1 through the mounting holes 21 and the clamping block structure 14, so as to facilitate disassembly and assembly.
[0049] In order to improve the installation stability of the heat dissipation piece 2, the number of the mounting holes 21 is multiple, and correspondingly, the number of the clamping block structure 14 is also multiple.
[0050] In other embodiments, the heat dissipation piece 2 can also be fixed in the groove bottom of the heat insulation groove 11 through screws or adhesion.
[0051] With reference to Figure 3 , the clamping block structure 14 includes two clamping blocks, each clamping block has a fixed end and a free end arranged oppositely, wherein the fixed end is fixed on the groove bottom of the heat insulation groove 11, and the free end can be deformed to extend into the mounting hole 21 and be clamped on the outside of the mounting hole 21. When the heat dissipation piece 2 is installed, the heat dissipation piece 2 is pushed into the heat insulation groove 11, and the clamping block structure 14 is automatically matched with the mounting hole 21 in the process of pushing the heat dissipation piece 2, so as to facilitate the installation process.
[0052] In summary, the terminal box provided by the embodiment can quickly dissipate the heat of the diode, and can also avoid the heat of the photovoltaic module from being transmitted to the diode area. In addition, the terminal box also has the advantages of simple structure, convenient disassembly and assembly, low cost and high practicability.
[0053] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A photovoltaic module junction box, comprising a junction box body (1) and a diode arranged in the junction box body (1), characterized in that: A heat-insulating groove (11) is provided at the bottom of the wiring box body (1) at a position corresponding to the diode, and the heat-insulating groove (11) forms a heat dissipation channel between the wiring box body (1) and the surface of the photovoltaic module; A heat insulating member (3) is provided at the bottom of the wire box body (1).
2. The photovoltaic module junction box according to claim 1, characterized in that: The heat-insulating groove (11) is provided through the bottom of the wire box body (1), so that the heat-insulating groove (11) has an inlet and outlet communicating with the outside air.
3. The photovoltaic module junction box according to claim 2, characterized in that: The heat-insulating groove (11) is cross-shaped and comprises a first extension portion and a second extension portion arranged crosswise, wherein: the first extension portion extends along the length direction of the wire box body (1) and passes through the wire box body (1); the second extension portion extends along the width direction of the wire box body (1) and passes through the wire box body (1).
4. The photovoltaic module junction box according to claim 3, characterized in that: The bottom of the wire box body (1) is provided with a wiring port (15) for allowing a lead wire to extend into the interior thereof, and the wiring port (15) is located at the intersection of the first extension portion and the second extension portion; The bottom of the wire box body (1) is further provided with an annular partition (16) arranged around the periphery of the wiring port (15).
5. The photovoltaic module junction box according to claim 1, characterized in that: A heat dissipation element (2) is provided in the heat insulation groove (11).
6. The photovoltaic module junction box according to claim 5, characterized in that: The heat sink (2) is an aluminum sheet or a copper sheet, and the heat sink (2) is attached to the bottom surface of the heat insulation groove (11).
7. The photovoltaic module junction box according to claim 5, characterized in that: A mounting hole (21) is provided on the heat dissipation element (2), and a clamping block structure (14) that is engaged with the mounting hole (21) is provided on the bottom surface of the heat insulation groove (11).
8. The photovoltaic module junction box according to claim 1, characterized in that: The bottom of the wire box body (1) is located at the position of the heat insulation groove (11), and a plurality of heat dissipation holes (12) are provided at the bottom of the heat insulation groove (11).
9. The photovoltaic module junction box according to claim 1, characterized in that: A limiting groove (13) is concavely provided on the bottom surface of the outer side of the wire box body (1), and the heat insulating member (3) is arranged in the limiting groove (13); The heat-insulating groove (11) is located between the limiting groove (13) and the bottom plate of the wire box body (1), and the heat-insulating groove (11) and the limiting groove (13) are connected in a stepped manner.