Paster welding split type junction box

Abstract

A patch welding split type junction box comprises a positive electrode box body, a negative electrode box body and at least one middle box body, a metal connecting piece is installed in each of the positive electrode box body, the negative electrode box body and the middle box body, a patch type diode is installed on each metal connecting piece, each metal connecting piece is provided with a first connecting end and a second connecting end, the first connecting end and the second connecting end are configured to extend downwards in the longitudinal direction and are arranged in a staggered mode in the transverse direction, open holes are formed in the corresponding positions of the bottoms of the positive electrode box body, the negative electrode box body and the middle box body, and at least one of the first connecting end and the second connecting end is welded to a bus bar of the photovoltaic module through the open holes. Therefore, the surface-mounted diodes of the positive electrode box body, the negative electrode box body and the middle box body are connected in series. The product adopts the surface-mounted diode, so that rapid processing and production of an assembly line are facilitated; and the three-dimensional metal connecting sheet can be accurately positioned in the welding process, so that the welding process is accurate and rapid.

Description

Technical Field

[0001] This utility model relates to the field of junction box structural design, specifically to a surface-mount photovoltaic junction box. Background Technology

[0002] Photovoltaic cells are devices that directly convert solar radiation energy into electrical energy. Photovoltaic modules are products made up of multiple connected and encapsulated photovoltaic cells, and are the basic unit of the cell array in a photovoltaic power generation system. The photovoltaic module junction box is a crucial connection device in making a solar module system. Its function is to prevent hot spots from forming when a solar module is partially shaded. If the junction box is damaged or the connection is loose, it will malfunction, causing the entire solar module system to fail when a solar module is partially shaded. The shaded area will then generate a large amount of heat, potentially burning out the module.

[0003] Patent CN112994611A discloses a low-cost, high-current split-type photovoltaic module junction box, which includes a left junction box, a middle junction box, and a right junction box, each including a cover, a body, and a conductive terminal module placed in the body. The conductive terminal module includes first and second conductive terminals and an axial diode disposed between the first and second conductive terminals. The first and second conductive terminals are roughly L-shaped and are staggered in the junction box body. The positive and negative busbars of the photovoltaic module pass through the two sides of the axial diode and are welded to the busbar welding areas on the first and second conductive terminals, respectively. However, because a standardized axial diode is used as a bypass protection element, rapid assembly line processing is not possible, resulting in low production efficiency. In addition, the structure of conductive terminals formed in the same plane is difficult to operate during the welding process. Summary of the Invention

[0004] The purpose of this invention is to provide a simple and reliable surface-mount photovoltaic junction box to solve the problems existing in current photovoltaic junction boxes mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a surface-mount soldered split junction box, comprising a positive electrode box, a negative electrode box, and at least one intermediate box, which are respectively attached to the backsheet of a photovoltaic module using silicone adhesive. Each of the positive electrode box, negative electrode box, and intermediate box contains a metal connecting piece, and each metal connecting piece contains a surface-mount diode. The metal connecting piece has a first connecting end and a second connecting end, wherein the first connecting end and the second connecting end are configured to extend downward longitudinally and be staggered laterally. The bottom of the positive electrode box, negative electrode box, and intermediate box has corresponding openings. At least one of the first connecting ends and the second connecting end is soldered to the busbar of the photovoltaic module through the opening, so that the surface-mount diodes in the positive electrode box, negative electrode box, and intermediate box are connected in series.

[0006] Preferably, the surface-mount diode is equipped with a heat sink.

[0007] Preferably, the metal connecting piece has a plurality of positioning holes distributed thereon, and the bottom surface of the positive electrode box, the negative electrode box, and the intermediate box is provided with a fixing post, which passes through the positioning hole.

[0008] Preferably, the positive electrode box, negative electrode box, and intermediate box are each filled with sealant.

[0009] Preferably, a positive electrode box cover is installed on the top of the positive electrode box, the positive electrode box includes a positive electrode cable, one end of the positive electrode cable is connected to a positive electrode connector, and the other end of the positive electrode cable is connected to the first connection terminal or the second connection terminal.

[0010] Preferably, a negative electrode box cover is installed on the top of the negative electrode box, the negative electrode box includes a negative electrode cable, one end of the negative electrode cable is connected to a negative electrode connector, and the other end of the negative electrode cable is connected to the first connection terminal or the second connection terminal.

[0011] Preferably, it also includes a wire clamping block, through which the positive electrode cable is fixed to the positive electrode housing, and the negative electrode cable is fixed to the negative electrode housing, through the wire clamping block, and the wire clamping block, the positive electrode cable, the negative electrode cable, the positive electrode housing, and the negative electrode housing are tightly fitted together.

[0012] Preferably, the top of the intermediate box is fitted with an intermediate box cover, and a handle is provided on the side of the intermediate box.

[0013] This application presents a surface-mount soldering split-type junction box that provides users with a highly reliable connection and sealing method, exhibiting excellent heat dissipation, insulation, and sealing performance. The advantages and features of this product compared to other similar products are: the use of surface-mount diodes facilitates rapid assembly line production; and the three-dimensional metal connecting pieces allow for precise positioning during the soldering process, ensuring accuracy and speed. Attached Figure Description

[0014] Appendix Figure 1 This is a three-dimensional disassembled schematic diagram of the patch-welded split junction box of this utility model;

[0015] Appendix Figure 2 This is a partially enlarged schematic diagram of the patch-welded split junction box of this utility model;

[0016] Appendix Figure 3 This is a front view of the patch-welded split junction box of this utility model;

[0017] Appendix Figure 4 This is a rear view of the patch-welded split junction box of this utility model;

[0018] Appendix Figure 5 This is a side view of the patch-welded split junction box of this utility model;

[0019] Appendix Figure 6 This is a cross-sectional view of the patch-welded split junction box of this utility model;

[0020] The components are: 1. Positive electrode housing; 11. Positive electrode housing cover; 2. Negative electrode housing; 21. Negative electrode housing cover; 3. Intermediate housing; 31. Intermediate housing cover; 32. Handle; 4. Metal connecting piece; 41. First connecting end; 42. Second connecting end; 43. Positioning hole; 5. Surface mount diode; 6. Opening; 7. Fixing post; 8. Positive electrode cable; 81. Positive electrode connector; 9. Negative electrode cable; 91. Negative electrode connector; 10. Wire clamping block. Detailed Implementation

[0021] In the following description, the terminology used in the specification will be briefly described, and embodiments will be described in detail. All terms used herein, including descriptive or technical terms, should be interpreted as having the meaning understood by one of ordinary skill in the art. However, these terms may have different meanings depending on the intent of one of ordinary skill in the art, precedent, or the emergence of new technologies.

[0022] Furthermore, some terms may be chosen by the applicant, and in such cases, the meaning of the chosen terms will be described in detail in the detailed description of the embodiments. Therefore, the terms used herein must be defined based on their meanings in conjunction with the description throughout the specification. Additionally, when a component “comprises” or “contains” an element, the component may also include other elements without excluding them, unless there is a specific description to the contrary. In the following description, terms such as “component” and “module” indicate a unit for performing at least one function or operation, wherein units and modules may be implemented as hardware or software or by combining hardware and software.

[0023] Embodiments will now be described more fully with reference to the accompanying drawings. However, embodiments may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the embodiments to those skilled in the art. In the following description, well-known functions or structures are not described in detail, as they would obscure the embodiments with unnecessary detail, and throughout the specification, the same reference numerals in the drawings denote the same or similar elements.

[0024] Appendix Figure 1 This is a three-dimensional disassembled schematic diagram of the surface mount welding split junction box of this utility model; the surface mount welding split junction box is a new component product independently developed by our company. The main function of this product is to connect and protect the solar cell module, and at the same time conduct the current generated by the battery module to the user. The product includes a positive electrode box 1, a negative electrode box 2, and at least one intermediate box 3, which are respectively attached to the back sheet of a photovoltaic module using silicone. Each of the positive electrode box 1, negative electrode box 2, and intermediate box 3 has a metal connecting piece 4 installed inside. Each metal connecting piece 4 has a surface-mount diode 5 installed on it. The metal connecting piece 4 has a first connecting end 41 and a second connecting end 42. The first connecting end 41 and the second connecting end 42 are configured to extend downward in the longitudinal direction and be staggered in the transverse direction. Openings 6 are provided at corresponding positions on the bottom of the positive electrode box 1, negative electrode box 2, and intermediate box 3. At least one of the first connecting ends 41 and the second connecting end 42 is welded to the busbar of the photovoltaic module through the opening 6 so that the surface-mount diodes 5 in the positive electrode box 1, negative electrode box 2, and intermediate box 3 are connected in series.

[0025] Appendix Figure 2This is a partially enlarged schematic diagram of the surface-mount soldered split junction box of this utility model. A plurality of positioning holes 43 are distributed on the metal connecting piece 4. Fixing posts 7 are provided on the bottom surfaces of the positive electrode box 1, negative electrode box 2, and intermediate box 3, and the fixing posts 7 pass through the positioning holes 43. The positive electrode box 1, negative electrode box 2, and intermediate box 3 are each filled with sealant, which encapsulates the entire circuit section, thus forming a permanently sealed and well-heat-dissipating whole. In addition, a heat sink is mounted on the surface-mount diode 5 to prevent overheating.

[0026] Appendix Figure 3 This is a front view of the patch-welded split junction box of this utility model; attached. Figure 4 This is a rear view of the patch-welded split junction box of this utility model; attached. Figure 5 This is a side view of the patch-welded split junction box of this utility model; attached. Figure 6 This is a cross-sectional view of the patch-welded split junction box of this utility model.

[0027] The top of the positive electrode housing 1 is fitted with a positive electrode housing cover 11. The positive electrode housing 1 includes a positive electrode cable 8, one end of which is connected to a positive electrode connector 81, and the other end of which is connected to a first connection terminal 41 or a second connection terminal 42. The top of the negative electrode housing 2 is fitted with a negative electrode housing cover 21. The negative electrode housing 2 includes a negative electrode cable 9, one end of which is connected to a negative electrode connector 91, and the other end of which is connected to a first connection terminal 41 or a second connection terminal 42. The top of the intermediate housing 3 is fitted with an intermediate housing cover 31, and a handle 32 is provided on the side of the intermediate housing 3.

[0028] The positive cable 8 is fixed to the positive box 1 by the wire clamping block 10, and the negative cable 9 is fixed to the negative box 2 by the wire clamping block 10. The wire clamping block 10, the positive cable 8, the negative cable 9, the positive box 1, and the negative box 2 are tightly fitted together.

[0029] This product provides users with a highly reliable connection and sealing method. It is easy, quick, and reliable to operate, has excellent heat dissipation, a compact size, and boasts safety, reliability, and excellent long-term working capability. It meets the requirements for use in harsh outdoor environments. Compared with other similar products, this product has the following advantages and features: it uses surface-mount diodes, facilitating rapid production on assembly lines; the three-dimensional metal connecting pieces allow for precise positioning during welding, ensuring accurate and fast welding.

[0030] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for limiting purposes. The description of features or aspects within each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope defined by the appended claims.

Claims

1. A surface-mount soldered split junction box, characterized in that: The system includes a positive electrode box (1), a negative electrode box (2), and at least one intermediate box (3) that are respectively attached to the back panel of the photovoltaic module by silicone. Each of the positive electrode box (1), the negative electrode box (2), and the intermediate box (3) has a metal connecting piece (4) installed inside. Each of the metal connecting pieces (4) has a surface mount diode (5) installed on it. The metal connecting piece (4) has a first connecting end (41) and a second connecting end (42). The first connecting end (41) and the second connecting end (42) are configured to extend downward in the longitudinal direction and be staggered in the transverse direction. The bottom of the positive electrode box (1), the negative electrode box (2), and the intermediate box (3) has corresponding openings (6). At least one of the first connecting ends (41) and the second connecting ends (42) is welded to the busbar of the photovoltaic module through the opening (6) so that the surface mount diodes (5) of the positive electrode box (1), the negative electrode box (2), and the intermediate box (3) are connected in series.

2. The surface mount soldering split junction box according to claim 1, characterized in that: The surface-mount diode (5) is equipped with a heat sink.

3. The surface mount soldering split junction box according to claim 1, characterized in that: The metal connecting piece (4) has a plurality of positioning holes (43) distributed on it. The bottom surfaces of the positive electrode box (1), negative electrode box (2) and intermediate box (3) are provided with fixing posts (7), which are inserted into the positioning holes (43).

4. The surface mount soldering split junction box according to claim 1, characterized in that: The positive electrode box (1), negative electrode box (2), and intermediate box (3) are each filled with sealant.

5. The surface mount soldering split junction box according to claim 1, characterized in that: The positive electrode box (1) is equipped with a positive electrode box cover (11) on the top. The positive electrode box (1) includes a positive electrode cable (8). One end of the positive electrode cable (8) is connected to a positive electrode connector (81), and the other end of the positive electrode cable (8) is connected to the first connection end (41) or the second connection end (42).

6. The surface mount soldering split junction box according to claim 5, characterized in that: The negative electrode box (2) is equipped with a negative electrode box cover (21) on the top. The negative electrode box (2) includes a negative electrode cable (9). One end of the negative electrode cable (9) is connected to a negative electrode connector (91), and the other end of the negative electrode cable (9) is connected to the first connection end (41) or the second connection end (42).

7. The surface mount soldering split junction box according to claim 6, characterized in that: It also includes a wire clamping block (10), the positive electrode cable (8) is fixed to the positive electrode box (1) by the wire clamping block (10), and the negative electrode cable (9) is fixed to the negative electrode box (2) by the wire clamping block (10). The wire clamping block (10), the positive electrode cable (8), the negative electrode cable (9), the positive electrode box (1), and the negative electrode box (2) are closely fitted together.

8. The surface mount soldering split junction box according to claim 6, characterized in that: The top of the intermediate box (3) is fitted with an intermediate box cover (31), and a handle (32) is provided on the side of the intermediate box (3).

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