Novel photovoltaic module junction box

Abstract

The utility model discloses a novel photovoltaic module junction box, and relates to the technical field of junction boxes, the novel photovoltaic module junction box comprises a box body and a box cover, the box body and the box cover are buckled, the side wall of the box body is provided with a heat dissipation window, the box body is internally provided with a separator plate, the separator plate encloses a mounting cavity in the box body, the separator plate is provided with a plurality of heat dissipation holes, and the heat dissipation holes are communicated with the heat dissipation window. A cover plate is arranged at the top of the mounting cavity, a circuit substrate is placed in the mounting cavity, a pluggable cooling fin is arranged on the circuit substrate, a mounting table is arranged on the cooling fin, and a voltage-withstanding diode is arranged on the mounting table. According to the junction box, the breakdown probability of the diodes can be reduced by arranging the voltage-resistant diodes, meanwhile, the box body and the box cover are buckled, the junction box is convenient to disassemble, damaged diodes are convenient to replace, and meanwhile, the junction box can be ensured to have good heat dissipation performance by arranging the heat dissipation structure.

Description

Technical Field

[0001] This application relates to the technical field of junction boxes, and specifically relates to a new type of photovoltaic module junction box. Background Art

[0002] A photovoltaic cell is a device that directly converts the solar radiation energy into electrical energy. A photovoltaic module is a product formed by connecting and encapsulating multiple photovoltaic cells, and is the basic unit of the battery array in a photovoltaic power generation system. A new type of photovoltaic module junction box is a key device for making a solar module into a system. The function of the junction box is to prevent the hot spot effect from occurring when a part of the solar module is blocked.

[0003] A new type of photovoltaic module junction box usually uses a combination of multiple diodes with low voltage withstand. During operation, the diodes are easily broken down, resulting in the need to frequently replace the damaged diodes, which brings inconvenience to the normal operation of the photovoltaic module. Summary of the Utility Model

[0004] The main purpose of this application is to provide a new type of photovoltaic module junction box, aiming to solve the above technical problems.

[0005] The technical solution adopted by this application is as follows:

[0006] A new type of photovoltaic module junction box includes a box body and a box cover. The box body and the box cover are snap-fitted. A heat dissipation window is provided on the side wall of the box body. A partition is provided inside the box body. The partition encloses an installation cavity inside the box body. The partition is provided with a number of heat dissipation holes. A cover plate is provided at the top of the installation cavity. A circuit board is placed in the installation cavity. A detachable heat sink is provided on the circuit board. An installation platform is provided on the heat sink. A voltage withstand diode is provided on the installation platform.

[0007] Optionally, a pedestal is provided on the inner bottom surface of the box body. The circuit board is placed on the pedestal and is installed in the box body in an elevated manner.

[0008] Optionally, a pair of jacks for installing the heat sink are provided on the circuit board. Installation legs are provided at the bottom of the heat sink. The installation legs are inserted into the jacks. Anti-detachment buckles are provided on the installation legs.

[0009] Optionally, the anti-detachment buckle includes a spring pin that can pop out to the outside of the installation leg. A counterbore for installing the spring pin is provided on the side wall of the installation leg.

[0010] Optionally, slender heat dissipation rib fins are provided on the outer periphery of the heat sink.

[0011] Optionally, the top surface of the box body is provided with a jack, and the bottom surface of the box cover is provided with a V-shaped insertion block that expands outward. The V-shaped insertion block is inserted into the jack and tightened to make the box cover and the box body plugged and fixed.

[0012] Optionally, the partition is provided with a slot, and the cover plate is provided with a buckle. The cover plate and the partition are buckled with each other through the slot and the buckle.

[0013] Optionally, a shielding buckling plate with an open bottom is arranged outside the heat dissipation window.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows:

[0015] A novel photovoltaic module junction box provided by an embodiment of the present application can reduce the probability of the diode being broken down by arranging a voltage-resistant diode. At the same time, the box body and the box cover are buckled, which is convenient for disassembly and convenient for replacing the damaged diode. Moreover, an installation cavity is formed by using a partition in the junction box for placing the heat sink and the circuit board, and is encapsulated by a cover plate, so as to form a protection for the heat sink and the circuit board. While preventing the staff from accidentally touching, the good heat dissipation performance of the junction box is still ensured. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the novel photovoltaic module junction box provided by an embodiment of the present application from one perspective;

[0017] Figure 2 is Figure 1 the enlarged view of part A in

[0018] Figure 3 is a cross-sectional view of the box body from one perspective;

[0019] Figure 4 is Figure 3 the enlarged view of part B in

[0020] Explanation of the reference numerals in the drawings:

[0021] 1 - box body, 101 - jack, 2 - box cover, 201 - V-shaped insertion block, 3 - heat dissipation window, 4 - shielding buckling plate, 5 - partition, 501 - slot, 6 - circuit board, 7 - heat sink, 701 - heat dissipation rib fins, 8 - heat dissipation hole, 9 - cover plate, 901 - buckle, 10 - voltage-resistant diode, 11 - mounting bracket, 12 - mounting leg, 13 - spring pin, 14 - counterbore. Detailed Embodiments

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0024] In the present application, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0026] Referring to the attached Figure 1 As shown, the embodiments of the present application provide a new type of photovoltaic module junction box, which includes a box body 1 and a box cover 2. The box cover 2 seals the box body 1. A heat dissipation window 3 is provided on the side wall of the box body 1, and a shielding buckle plate 4 is provided outside the heat dissipation window 3. The shielding buckle plate 4 has a closed design on all sides except for the open bottom surface. This design can not only achieve heat dissipation but also facilitate the handling and extraction of the junction box.

[0027] In an exemplary embodiment, to integrate the box cover 2 and the box body 1, refer toFigure 1 As shown, the top surface of the box body 1 is provided with jacks 101, and the jacks 101 are located at the four corner points of the box body 1. The bottom surface of the box cover 2 is provided with V-shaped insertion blocks 201 that expand outward. The V-shaped insertion blocks 201 correspond to the jacks 101 one by one, and the V-shaped insertion blocks 201 can converge inward under pressure. When the box cover 2 is buckled onto the box body 1, the V-shaped insertion blocks 201 are inserted into the jacks 101 and converge due to being squeezed by the jacks 101. At the same time, the converging V-shaped insertion blocks 201 have a tendency to reset outward and are tightened in the jacks 101 so that the box cover 2 and the box body 1 are plugged and fixed. In this way, it is convenient to disassemble and assemble the junction box, thus facilitating the replacement of the breakdown voltage-resistant diode 10.

[0028] Refer to the above for Figure 1 and Figure 3 As shown, a partition 5 is arranged inside the box body 1. The partition 5 encloses an installation cavity inside the box body 1. The inner bottom surface of the installation cavity is provided with a pedestal 11, and the circuit board 6 is fixedly arranged on the pedestal 11. The circuit board 6 is arranged above the box body 1 through the pedestal 11 and does not contact the bottom surface of the installation cavity, so that the circuit board 6 can dissipate heat better. In order to realize the heat dissipation of the circuit board 6, a detachable heat sink 7 is arranged on the circuit board 6, and the heat sink 7 takes away the heat generated by the heat dissipation substrate 6. At the same time, in order to realize the outward heat dissipation of the installation cavity, the partition 5 is provided with a plurality of heat dissipation holes 8. The heat dissipation holes 8 and the heat dissipation window 3 conduct the outside and the inside of the junction box, realizing the outward heat dissipation of the inside of the junction box. And, a cover plate 9 is arranged at the top of the installation cavity, and the cover plate 9 seals the installation cavity, protecting the heat sink 7 by using the partition 5 and the cover plate 9 to prevent the staff from accidentally touching it, and taking heat dissipation into account. An installation platform is arranged on the heat sink 7, and a voltage-resistant diode 10 is arranged on the installation platform. The voltage-resistant diode 10 is electrically connected to the circuit board. Compared with ordinary diodes, by arranging the voltage-resistant diode 10, the risk of breakdown can be reduced, thereby reducing the maintenance frequency of the new photovoltaic module junction box.

[0029] In the above, for realizing the detachable connection between the heat sink 7 and the circuit board 6, refer to Figure 3 and Figure 4 As shown, a pair of jacks for installing the heat sink 7 are arranged on the circuit board 6. The bottom of the heat sink 7 is provided with installation legs 12, and the installation legs 12 are inserted into the jacks. An anti-release buckle is arranged on the installation legs to prevent the heat sink 7 from being separated from the circuit board 6 under non-external force. Specifically, as Figure 4As shown, the anti-disengagement mechanism includes a spring pin 13 that can pop outwards from the outside of the mounting leg 12. A counterbore 14 for mounting the spring pin 13 is provided on the side wall of the mounting leg 12. When the mounting leg 12 is inserted into the jack, the spring pin 13 is pressed into the counterbore 14. After the mounting leg 12 is completely inserted into the jack, the spring pin 13 is located below the bottom surface of the circuit board 6, and thus pops out of the counterbore 14 to prevent the mounting leg 12 from disengaging from the circuit board 6 without reason. Thus, based on the structural design of the jack, the mounting leg 12, and the anti-disengagement mechanism, the quick insertion and removal installation between the heat sink 7 and the circuit board 6 can be realized, which is very convenient.

[0030] In a preferred embodiment, in order to improve the heat dissipation effect, as Figure 1 shown, slender heat dissipation rib fins 701 are provided on the outer periphery of the heat sink 7. Through the heat dissipation rib fins 701, it is helpful to improve the heat dissipation effect.

[0031] Of course, in an exemplary embodiment, for the convenience of installing the partition 5 and the cover plate 9, refer to Figure 1 and Figure 2 shown, an ear plate is integrally formed on the outer edge of the top surface of the partition 5. A slot 501 is provided on the surface of the ear plate. The slot 501 has a circular cavity and a constricted socket. An insertion buckle 901 corresponding to the slot 501 one by one is integrally formed on the outer edge of the bottom surface of the cover plate 9. The cover plate 9 and the partition 5 are fixedly connected to each other by buckling the slot 501 and the insertion buckle 901.

[0032] In summary, the novel photovoltaic module junction box provided by the embodiment of the present application uses a partition to enclose an installation cavity in the junction box for placing the heat sink and the circuit board, and is encapsulated by a cover plate, thereby forming protection for the heat sink and the circuit board. While preventing accidental contact by the staff, it still ensures good heat dissipation performance of the junction box, and the fixing structures between the box body and the box cover, and between the cover plate and the partition are convenient for disassembly and assembly, facilitating daily maintenance of the circuit board.

[0033] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A new type of photovoltaic module junction box, characterized in that: It includes a box body and a box cover, the box body and the box cover are buckled together, the side wall of the box body is provided with a heat dissipation window, the box body is provided with a partition plate inside the box body, the partition plate forms an installation cavity inside the box body, the partition plate is provided with a plurality of heat dissipation holes, a cover plate is provided on the top of the installation cavity, a circuit substrate is placed in the installation cavity, a pluggable heat sink is provided on the circuit substrate, a mounting platform is provided on the heat sink, and a withstand voltage diode is provided on the mounting platform.

2. The novel photovoltaic module junction box according to claim 1 is characterized in that: The inner bottom surface of the box body is provided with a stand, and the circuit substrate is arranged on the stand and is installed in the box body in an overhead manner.

3. The novel photovoltaic module junction box according to claim 1 is characterized in that: The circuit substrate is provided with a pair of insertion holes for mounting the heat sink, the bottom of the heat sink is provided with mounting legs, the mounting legs are plugged into the insertion holes, and anti-drop buckles are provided on the mounting legs.

4. The novel photovoltaic module junction box according to claim 3 is characterized in that: The anti-drop buckle comprises a spring pin that can pop out to the outside of the mounting leg, and the side wall of the mounting leg is provided with a countersunk hole for mounting the spring pin.

5. The novel photovoltaic module junction box according to claim 1 is characterized in that: The outer periphery of the heat sink is provided with slender heat dissipation fins.

6. The novel photovoltaic module junction box according to claim 1 is characterized in that: The top surface of the box body is provided with an insertion hole, and the bottom surface of the box cover is provided with a V-shaped plug block expanding outward, and the V-shaped plug block is inserted into the insertion hole and tightened so that the box cover and the box body are plugged and fixed.

7. The novel photovoltaic module junction box according to claim 1 is characterized in that: The partition is provided with a slot, and the cover is provided with a buckle, and the cover and the partition are buckled with each other through the slot and the buckle.

8. The novel photovoltaic module junction box according to claim 1 is characterized in that: A shielding buckle plate with an opening at the bottom is arranged on the outer side of the heat dissipation window.

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