Module diode junction box

Abstract

The utility model discloses a module diode junction box, which comprises an anode junction box, a middle junction box and a cathode junction box, one side of the anode junction box is connected with an anode connector, and one side of the cathode junction box is connected with a cathode connector. Module diode conducting strips in the positive electrode junction box, the middle junction box and the negative electrode junction box are of copper sheet structures, the copper sheet structures are communicated with the cables through butt welding, one ends of the heat dissipation aluminum sheets are communicated with the copper sheet structures, and the other ends of the heat dissipation aluminum sheets are located on the outer sides of the junction boxes and communicated with external assemblies. According to the utility model, the welding positions of the cable and the module diode and the tin block position are overlapped up and down, the size is reduced, the heat dissipation aluminum sheet replaces the existing lengthened module diode copper sheet, the cost is reduced, the structural design of the aluminum sheet transfers the heat of the module diode to the assembly for more heat dissipation, the sufficient contact surface is ensured, and the service life of the module diode is prolonged. And better heat dissipation is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of junction box technology, and in particular to a modular diode junction box. Background Technology

[0002] With the large-scale use of photovoltaic junction boxes, market competition has led to higher requirements for the production efficiency and cost of junction boxes. Many mainstream manufacturers have begun to use modular diodes in the design of junction boxes. Traditional junction boxes consist of a positive junction box, a negative junction box, and an intermediate junction box. During use, the circuit will be kept in a closed state for a long time, which will lead to the problem of overheating and burning of the components in the circuit.

[0003] Existing technologies dissipate heat by lengthening the copper or aluminum plates of the module diodes. However, lengthening the copper plates increases the size of the junction box and raises costs. Replacing copper with aluminum means that the aluminum plates are still located inside the junction box, resulting in only average heat dissipation. While U-shaped aluminum plates can conduct heat to the outside, sufficient contact between the U-shaped aluminum plates and external components cannot be guaranteed. Utility Model Content

[0004] To address the aforementioned technical problems, a modular diode junction box is provided.

[0005] To achieve the above objectives, this utility model discloses a modular diode junction box, including a positive junction box, an intermediate junction box, and a negative junction box. A positive connector is connected to one side of the positive junction box, and a negative connector is connected to one side of the negative junction box. The conductive plates of the modular diodes inside the positive, intermediate, and negative junction boxes are copper plate structures. The copper plate structures are connected to the cables by spot welding. One end of the heat sink aluminum plate is connected to the copper plate structure, and the other end is located outside the junction box and connected to external components.

[0006] Furthermore, the heat dissipation aluminum sheet is a bent U-shaped double-layer structure, including a first bent section that abuts against the copper sheet structure. The first bent section is connected to a third bent section through a second bent section. The third bent section is located at the bottom opening of the positive terminal box, the intermediate terminal box, and the negative terminal box and is connected to external components. A fourth bent section and a fifth bent section are provided on the side of the third bent section away from the second bent section.

[0007] Furthermore, the first bending segment and the third bending segment are arranged in parallel. A punching groove is provided on the first bending segment, and two sets of punching segments are formed in the punching groove, which respectively abut against the upper surface of the third bending segment.

[0008] Furthermore, the first bent section is provided with a positioning hole that fits onto the positioning post of the junction box.

[0009] Furthermore, the third bending section is provided with limiting blocks on both sides that match the opening of the junction box.

[0010] Furthermore, the fifth bending segment is parallel to the third bending segment, and the overlapping part formed by the fourth bending segment and the fifth bending segment overlaps on the positive terminal box, the intermediate terminal box and the negative terminal box.

[0011] Furthermore, at least one set of heat dissipation aluminum fins is provided inside the positive terminal box and the negative terminal box.

[0012] Furthermore, the intermediate junction box is equipped with at least two sets of heat dissipation aluminum fins.

[0013] The beneficial effects of this utility model compared with the prior art are as follows:

[0014] 1. The volume is reduced by overlapping the soldering positions of the cables and module diodes with the solder block positions vertically;

[0015] 2. Reduce costs by replacing the existing extended module diode copper sheets with heat sink aluminum sheets;

[0016] 3. Through the structural design of the aluminum sheet, the heat from the module diodes is transferred to the component for better heat dissipation;

[0017] 4. The structural design of the aluminum sheet ensures sufficient contact surface, facilitating better heat dissipation. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the internal structure of the positive terminal box of this utility model.

[0021] Figure 3 This is a schematic diagram of the internal structure of the intermediate junction box of this utility model.

[0022] Figure 4 This is a schematic diagram of the heat dissipation aluminum fin structure of this utility model.

[0023] In the diagram: 10 is the positive terminal box; 101 is the wire clamping cover; 11 is the module diode; 12 is the copper sheet structure; 13 is the cable; 14 is the solder block; 20 is the intermediate terminal box; 30 is the negative terminal box; 40 is the positive connector; 50 is the negative connector; 60 is the heat sink aluminum sheet; 601 is the first bending section; 602 is the second bending section; 603 is the third bending section; 604 is the fourth bending section; 605 is the fifth bending section; 606 is the punching section; 607 is the positioning hole; 608 is the limit block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] One embodiment of this utility model is as follows: Figure 1 and Figure 2 As shown, there are positive terminal box 10, intermediate terminal box 20, and negative terminal box 30. One side of the positive terminal box 10 is connected to a positive connector 40, and one side of the negative terminal box 30 is connected to a negative connector 50. The conductive sheet of the module diode 11 inside the positive terminal box 10, intermediate terminal box 20, and negative terminal box 30 is a copper sheet structure 12. The copper sheet structure 12 and the cable 13 are connected by soldering through a solder block 14. The soldering position overlaps with the position of the solder block, reducing the length of the copper sheet structure of the module diode and reducing its volume. One end of the heat dissipation aluminum sheet 60 is connected to the copper sheet structure 12, and the other end is located outside the terminal box and connected to the external components. The inlet of the positive terminal box 10 and the negative terminal box 30 is provided with a wire clamping cover 101. Through the overlap of the heat dissipation aluminum sheet, the heat on the copper sheet structure of the module diode is transferred to the external components through the heat dissipation aluminum sheet, which reduces the length of the copper sheet structure and also better conducts heat through the heat dissipation aluminum sheet.

[0026] The heat sink aluminum fin 60 has a bent U-shaped double-layer structure, including a first bent section 601 that abuts against the copper sheet structure 12. The first bent section 601 is connected to a third bent section 603 through a second bent section 602. The third bent section 603 is located at the bottom opening of the positive terminal junction box 10, the intermediate terminal junction box 20 and the negative terminal junction box 30 and is connected to external components. A fourth bent section 604 and a fifth bent section 605 are provided on the side of the third bent section 603 away from the second bent section 602.

[0027] The first bending section 601 and the third bending section 603 are arranged in parallel. A punching groove is provided on the first bending section 601, and two sets of punching sections 606 are formed in the punching groove, which respectively abut against the upper surface of the third bending section 603. The punching sections on the first bending section abut against the third bending section, which limits the bottom of the heat sink aluminum fin from deviating too much upward, increases the structural stability of the U-shaped heat sink aluminum fin, and ensures full contact between the heat sink aluminum fin and external components.

[0028] The first bending section 601 is provided with a positioning hole 607 that fits onto the positioning post of the junction box for positioning and installing the heat sink aluminum fins.

[0029] The third bend section 603 has limit blocks 608 on both sides that match the opening of the junction box to prevent lateral displacement of the heat sink aluminum fins after installation.

[0030] The fifth bending segment 605 is parallel to the third bending segment 603. The overlapping part formed by the fourth bending segment 604 and the fifth bending segment 605 overlaps on the positive terminal box 10, the intermediate terminal box 20 and the negative terminal box 30. The bending structure at the tail of the heat dissipation aluminum sheet restricts the bottom of the aluminum sheet from deviating too much downward.

[0031] In a preferred embodiment of this application, a set of heat dissipation aluminum fins 60 are respectively provided in the positive terminal junction box 10 and the negative terminal junction box 30, and two sets of heat dissipation aluminum fins 60 are provided in the intermediate junction box 20.

[0032] Several points need to be clarified: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships, and the relative positional relationships may change when the absolute position of the described objects changes. Second, in this document, relational terms such as "first" and "second" are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities.

[0033] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.

Claims

1. A modular diode junction box, characterized in that, The device includes a positive terminal box (10), an intermediate terminal box (20), and a negative terminal box (30). A positive connector (40) is connected to one side of the positive terminal box (10), and a negative connector (50) is connected to one side of the negative terminal box (30). The conductive plates of the module diodes (11) in the positive terminal box (10), the intermediate terminal box (20), and the negative terminal box (30) are copper sheet structures (12). The copper sheet structure (12) and the cable (13) are connected by soldering through a solder block (14). One end of the heat sink aluminum sheet (60) is connected to the copper sheet structure (12), and the other end is located outside the terminal box and connected to the external components. The inlet ports of the positive terminal box (10) and the negative terminal box (30) are provided with wire clamping covers (101).

2. A modular diode junction box according to claim 1, characterized in that, The heat dissipation aluminum sheet (60) is a bent U-shaped double-layer structure, including a first bent section (601) that abuts against the copper sheet structure (12). The first bent section (601) is connected to a third bent section (603) through a second bent section (602). The third bent section (603) is located at the bottom opening of the positive terminal box (10), the intermediate terminal box (20) and the negative terminal box (30) and is connected to external components. A fourth bent section (604) and a fifth bent section (605) are provided on the side of the third bent section (603) away from the second bent section (602).

3. A modular diode junction box according to claim 2, characterized in that, The first bending section (601) and the third bending section (603) are arranged in parallel. A punching groove is provided on the first bending section (601), and two sets of punching sections (606) are formed in the punching groove, which respectively abut against the upper surface of the third bending section (603).

4. A modular diode junction box according to claim 3, characterized in that, The first bending section (601) is provided with a positioning hole (607) that fits onto the positioning post of the junction box.

5. A modular diode junction box according to claim 2, characterized in that, The third bending section (603) is provided with limiting blocks (608) on both sides that match the opening of the junction box.

6. A modular diode junction box according to claim 2, characterized in that, The fifth bending segment (605) is parallel to the third bending segment (603), and the overlapping part composed of the fourth bending segment (604) and the fifth bending segment (605) overlaps on the positive terminal box (10), the intermediate terminal box (20) and the negative terminal box (30).

7. A modular diode junction box according to claim 1, characterized in that, At least one set of heat dissipation aluminum fins (60) is provided in the positive terminal box (10) and the negative terminal box (30).

8. A modular diode junction box according to claim 1, characterized in that, At least two sets of heat dissipation aluminum fins (60) are provided inside the intermediate junction box (20).

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