Photovoltaic module junction box

Abstract

The utility model discloses a photovoltaic module junction box, and relates to the technical field of junction boxes, the photovoltaic module junction box comprises a box body and a box cover, 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 an installation cavity in the box body, the installation cavity is internally provided with a circuit substrate and a heat dissipation sheet, and the heat dissipation window is arranged on the side wall of the box body. The heat dissipation fins are arranged in the installation cavity in an overhead mode, the circuit substrate is placed in the heat dissipation fins, the partition plate is provided with a plurality of heat dissipation holes, and a cover plate is arranged at the top of the installation cavity. According to the junction box, the installation cavity is defined by the partition plates in the junction box and used for containing the cooling fins and the circuit substrate, packaging is carried out through the cover plate, and therefore the cooling fins and the circuit substrate are protected, and the good cooling performance of the junction box is still guaranteed under the condition that workers are prevented from touching the junction box by mistake.

Description

Technical Field

[0001] The present application relates to the technical field of junction boxes, and in particular to a junction box for a photovoltaic module. Background Art

[0002] Photovoltaic cells are devices that directly convert sunlight radiation into electrical energy. Photovoltaic modules are products made up of multiple photovoltaic cells connected and packaged, and are the basic unit of the battery array in the photovoltaic power generation system. The photovoltaic module junction box is a key device in the solar module system. The function of the junction box is to prevent the hot spot effect when the solar module is partially blocked.

[0003] When the working circuit of the photovoltaic module junction box adopts external heat dissipation, the aluminum heat sink used to dissipate the working circuit is exposed to the outside, which may cause workers to accidentally touch it and get burned. Utility Model Content

[0004] The main purpose of this application is to provide a photovoltaic module junction box to solve the above-mentioned technical problems.

[0005] The technical solutions adopted in this application are as follows:

[0006] A photovoltaic module junction box comprises a box body and a box cover, wherein the side wall of the box body is provided with a heat dissipation window, the interior of the box body is provided with a partition, the partition forms an installation cavity within the box body, a circuit substrate and a heat sink are placed in the installation cavity, the heat sink is suspended in the installation cavity, the circuit substrate is placed in the heat sink, the partition is provided with a plurality of heat dissipation holes, and a cover is provided on the top of the installation cavity.

[0007] Optionally, a carrying arm is arranged on the outer side of the heat sink, and a platform for supporting the carrying arm is arranged in the mounting cavity.

[0008] Optionally, the heat sink has an inner cavity for placing the circuit substrate, and the outer periphery of the heat sink is provided with slender heat dissipation fins.

[0009] Optionally, a plug hole is provided on the top surface of the box body, and a V-shaped plug block expanding outward is provided on the bottom surface of the box cover, and the V-shaped plug block is inserted into the plug hole and tightened so that the box cover and the box body are plugged and fixed.

[0010] Optionally, 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.

[0011] Optionally, a shielding buckle plate with an opening at the bottom is provided on the outer side of the heat dissipation window.

[0012] Compared with the prior art, the beneficial effects of this application are:

[0013] A photovoltaic module junction box proposed in an embodiment of the present application uses partitions to form an installation cavity in the junction box for placing a heat sink and a circuit substrate, and seals them with a cover plate, thereby protecting the heat sink and the circuit substrate. While preventing staff from accidentally touching them, good heat dissipation performance of the junction box is still guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a photovoltaic module junction box provided in an embodiment of the present application at one viewing angle;

[0015] Figure 2 A schematic diagram of the structure of a photovoltaic module junction box provided in an embodiment of the present application at one viewing angle;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0017] Description of the reference numerals in the accompanying drawings:

[0018] 1-box body, 101-jack, 2-box cover, 201-V-shaped plug, 3-heat dissipation window, 4-protective buckle plate, 5-partition, 501-slot, 6-circuit substrate, 7-heat sink, 701-heat dissipation fin, 8-heat dissipation hole, 9-cover plate, 901-buckle, 10-carrier. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] 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 used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field 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 scope of protection required by this application.

[0023] Refer to the attached Figure 1 to Figure 2 As shown, an embodiment of the present application provides a photovoltaic module junction box, including a box body 1 and a box cover 2, the box cover 2 seals the box body 1, a heat dissipation window 3 is arranged on the side wall of the box body 1, a baffle plate 4 is arranged on the outer side of the heat dissipation window 3, and the baffle plate is closed except for the bottom surface which is open. This design makes it convenient to take and extract the junction box.

[0024] In an exemplary embodiment, in order to integrate the box cover 2 with the box body 1, see Figure 1 to Figure 2 As shown, the top surface of the box body 1 is provided with a socket 101, and the socket 101 is located at the four corners of the box body 1. The bottom surface of the box cover 2 is provided with a V-shaped plug 201 that expands outward. The V-shaped plug 201 corresponds to the socket 101 one by one, and the V-shaped plug 201 can converge inward under pressure. When the box cover 2 is buckled with the box body 1, the V-shaped plug 201 inserted into the socket 101 is squeezed by the socket 101 and converges. At the same time, the convergent V-shaped plug 201 has a tendency to reset outward and is tightened in the socket 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.

[0025] See above Figure 1 to Figure 2, a partition 5 is arranged inside the box body 1, and the partition 5 is surrounded by the box body 1 to form an installation cavity, and a circuit substrate 6 and a heat sink 7 are placed in the installation cavity. Among them, a group of carriers 10 are symmetrically arranged in the installation cavity, and a semicircular installation groove is opened on the top side of the carrier 10. The heat sink 7 is rectangular and has an inner cavity. The circuit substrate 6 is placed in the inner cavity, and heat is dissipated through the heat sink 7. The two ends of the heat sink 7 are integrally formed with a bearing arm, and the bearing arm is placed in the installation groove, so that the heat sink 7 is suspended in the installation cavity by the carrier 10 and does not contact the bottom surface of the installation cavity, which helps to improve the heat dissipation effect. At the same time, in order to achieve heat dissipation from the installation cavity to the outside, the partition 5 is provided with a plurality of heat dissipation holes 8. The heat dissipation holes 8 and the heat dissipation window 3 form a conduction between the outside of the junction box and the inside of the junction box, so as to achieve heat dissipation from the inside of the junction box to the outside. In addition, a cover plate 9 is arranged on the top of the installation cavity, and the cover plate 9 seals the installation cavity. The partition 5 and the cover plate 9 are used to protect the heat sink 7 to avoid accidental contact by the staff, and to take heat dissipation into consideration.

[0026] In a preferred embodiment, in order to improve the heat dissipation effect, as Figure 1 and Figure 2 As shown, the outer periphery of the heat sink 7 is provided with slender heat dissipation fins 701 , which help to improve the heat dissipation effect.

[0027] Of course, in an exemplary embodiment, to facilitate the installation of the partition plate 5 and the cover plate 9, see Figure 1 , Figure 2 and Figure 3 As shown, the outer edge of the top surface of the partition 5 is integrally formed with an ear plate, and a slot 501 is opened on the surface of the ear plate. The slot 501 has a circular groove cavity and an inward-retracted socket. The outer edge of the bottom surface of the cover plate 9 is integrally formed with a buckle 901 corresponding to the slot 501 one by one. The cover plate 9 and the partition 5 are fixed to each other by buckling the slot 501 with the buckle 901.

[0028] In summary, the photovoltaic module junction box provided in the embodiment of the present application uses partitions to form an installation cavity inside the junction box for placing the heat sink and the circuit substrate, and seals them with a cover plate, thereby protecting the heat sink and the circuit substrate. While preventing staff from accidentally touching them, the good heat dissipation performance of the junction box is still guaranteed, and the fixed structure between the box body and the box cover, and the cover plate and the partition plate is easy to disassemble and assemble, thereby facilitating daily maintenance of the circuit substrate.

[0029] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A photovoltaic module junction box, characterized in that: The invention comprises a box body and a box cover, wherein the side wall of the box body is provided with a heat dissipation window, the interior of the box body is provided with a partition, the partition forms an installation cavity within the box body, a circuit substrate and a heat sink are placed in the installation cavity, the heat sink is suspended in the installation cavity, the circuit substrate is placed in the heat sink, the partition is provided with a plurality of heat dissipation holes, and a cover is provided on the top of the installation cavity.

2. The photovoltaic module junction box according to claim 1, characterized in that: A carrying arm is arranged on the outer side of the heat sink, and a carrier for supporting the carrying arm is arranged in the installation cavity.

3. The photovoltaic module junction box according to claim 1, characterized in that: The heat sink has an inner cavity for placing the circuit substrate, and the outer periphery of the heat sink is provided with slender heat dissipation fins.

4. The photovoltaic module junction box according to claim 1, 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.

5. The photovoltaic module junction box according to claim 1, 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.

6. The photovoltaic module junction box according to claim 1, 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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