Photovoltaic junction box

Abstract

The utility model belongs to photovoltaic technical field, specifically discloses a kind of photovoltaic terminal box.The utility model provides photovoltaic terminal box is suitable for four partial assembly, and it is equipped with first diode and second diode in its terminal box body, the two pins of first diode are connected with first conducting part and second conducting part respectively, the two pins of second diode are connected with second conducting part and third conducting part respectively, the pin connection of the welding portion of heat dissipation part and diode, the heat generated when diode works is conducted to the bottom of terminal box body by welding portion and first heat dissipation portion, the bottom of terminal box body is contacted with the glass part of photovoltaic assembly, heat is conducted to the glass part of photovoltaic assembly from the bottom of terminal box body, the effect of heat dissipation is enhanced, avoid heat accumulation in terminal box body, improve the heat dissipation capacity of photovoltaic terminal box, reduce the probability of photovoltaic terminal box failure, and then improve the security of photovoltaic assembly use.

Description

Technical Field

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

[0002] A photovoltaic junction box is a connecting device between a solar cell array composed of solar cell modules and a solar charging control device. Its main function is to connect and protect the solar photovoltaic modules, connect the power generated by the solar cells to external lines, and conduct the current generated by the photovoltaic modules.

[0003] With the development of BC module technology, the competition between TOPCon and BC modules in terms of power output has become a decisive factor in the future development trend of these two technological routes. TOPCon modules use quad-cell technology, which can improve the power output of existing modules at a lower cost, and the power output can approach that of BC modules. However, due to the adjustment of the series and parallel connection of cells within the module, the original three-part junction box is no longer suitable for quad-cell modules. The original three-part junction box system needs to be merged into a single junction box suitable for quad-cell modules. This junction box contains two diodes. When multiple diodes are triggered for bypass protection, the heat inside the junction box becomes too concentrated. The heat dissipation capabilities of different diodes are inconsistent. The diode connected to the cable has a stronger heat dissipation capability and a lower temperature, while the other diode has a higher temperature and is prone to failure. Therefore, it is necessary to improve the heat dissipation capability of the junction box to reduce the probability of safety accidents caused by junction box failure. Utility Model Content

[0004] The purpose of this invention is to provide a photovoltaic junction box that improves the heat dissipation capacity of photovoltaic junction boxes suitable for four-section modules, thereby reducing the probability of safety accidents caused by junction box failure.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A photovoltaic junction box includes a junction box body and a heat sink, a first diode, a second diode, a first conductive element, a second conductive element, and a third conductive element disposed within the junction box body. Two pins of the first diode are connected to the first conductive element and the second conductive element, respectively. Two pins of the second diode are connected to the second conductive element and the third conductive element, respectively. The heat sink includes a soldering portion and a first heat dissipation portion. The soldering portion is connected to the pins of the first diode or the second diode. The first heat dissipation portion extends towards the bottom of the junction box body and is configured to conduct heat generated by the first diode or the second diode to the bottom of the junction box body.

[0007] As an optional technical solution for the aforementioned photovoltaic junction box, the first heat dissipation part includes at least one first heat dissipation plate. One end of the first heat dissipation plate is connected to the edge of the welding part, and the other end of the first heat dissipation plate extends toward the bottom of the junction box body and is bent to form a heat dissipation base plate parallel to the bottom of the junction box body. A first extended heat dissipation plate is provided on one side edge of the heat dissipation base plate, and the first extended heat dissipation plate extends toward the side wall of the junction box body.

[0008] As an optional technical solution for the aforementioned photovoltaic junction box, the first heat dissipation part includes two first heat dissipation plates, and the two first heat dissipation plates are connected to the adjacent edges of the welding part.

[0009] As an optional technical solution for the aforementioned photovoltaic junction box, the first heat dissipation part includes a first heat dissipation plate, and a second extended heat dissipation plate is provided on the side of the heat dissipation base plate opposite to the first extended heat dissipation plate. One end of the second extended heat dissipation plate is connected to the heat dissipation base plate, and the other end of the second extended heat dissipation plate extends toward the side of the welding part.

[0010] As an optional technical solution for the aforementioned photovoltaic junction box, the heat dissipation component further includes a second heat dissipation part. One end of the second heat dissipation part is connected to the side of the welding part near the side wall of the junction box body, and the other end of the second heat dissipation part extends toward the bottom of the junction box body. The second heat dissipation part is configured to conduct the heat generated by the first diode or the heat generated by the second diode to the side wall of the junction box body.

[0011] As an optional technical solution for the aforementioned photovoltaic junction box, the heat dissipation component further includes a third heat dissipation part, which is disposed on the side of the first heat dissipation part near the side wall of the junction box body. The third heat dissipation part is configured to conduct the heat generated by the first diode or the second diode to the side wall of the junction box body.

[0012] As an optional technical solution for the aforementioned photovoltaic junction box, the heat dissipation component further includes a fourth heat dissipation part, one end of which is connected to the first heat dissipation part, and the other end of which extends toward the top of the junction box body. The fourth heat dissipation part is configured to conduct the heat generated by the first diode or the second diode to the top of the junction box body.

[0013] As an optional technical solution for the aforementioned photovoltaic junction box, the fourth heat dissipation part includes a fourth heat dissipation plate. One end of the fourth heat dissipation plate is connected to the first heat dissipation part, and the other end of the fourth heat dissipation plate extends toward the top of the junction box body and is bent to form a heat dissipation top plate parallel to the top of the junction box body.

[0014] As an optional technical solution for the aforementioned photovoltaic junction box, the first diode and the second diode are spaced apart along the length of the junction box body. Along the length of the junction box body, a cable is provided at one end of the junction box body. The pin of the first diode is bent near the cable and contacts the cable. The other pin of the first diode and the two pins of the second diode are both straight pins. The two pins of the second diode are respectively connected to the heat sink, and / or the other pin of the first diode is connected to the heat sink.

[0015] As an optional technical solution for the aforementioned photovoltaic junction box, the first conductive element includes a first conductive sheet, and one pin of the first diode is connected to the first conductive sheet;

[0016] The second conductive element includes a second conductive sheet, and another pin of the first diode and one pin of the second diode are respectively connected to the second conductive sheet;

[0017] The third conductive element includes a third conductive sheet, and another pin of the second diode is connected to the third conductive sheet.

[0018] As an optional technical solution for the photovoltaic junction box mentioned above, the first conductive sheet is provided with a first folding plate near the edge of the side wall of the junction box body. One end of the first folding plate is connected to the first conductive sheet, and the other end of the first folding plate extends toward the bottom of the junction box body. The first folding plate is configured to conduct the heat generated by the first diode to the side wall of the junction box body.

[0019] And / or, the second conductive sheet is provided with a second folding plate near the edge of the side wall of the junction box, one end of the second folding plate is connected to the second conductive sheet, and the other end of the second folding plate extends toward the bottom of the junction box. The second folding plate is configured to conduct the heat generated by the first diode and the second diode to the side wall of the junction box.

[0020] And / or, the third conductive sheet is provided with a third folding plate near the edge of the side wall of the junction box, one end of the third folding plate is connected to the third conductive sheet, and the other end of the third folding plate extends toward the bottom of the junction box. The third folding plate is configured to conduct the heat generated by the second diode to the side wall of the junction box.

[0021] Beneficial effects:

[0022] The photovoltaic junction box provided by this utility model is suitable for four-segment modules. The junction box contains a first diode and a second diode. The two pins of the first diode are connected to a first conductive element and a second conductive element, respectively. The two pins of the second diode are connected to a second conductive element and a third conductive element, respectively. The soldered portion of the heat sink is connected to the pins of the diode. The heat generated by the diode during operation is conducted to the bottom of the junction box through the soldered portion and the first heat sink. The bottom of the junction box contacts the glass portion of the photovoltaic module, and the heat is then conducted from the bottom of the junction box to the glass portion of the photovoltaic module, enhancing the heat dissipation effect, preventing heat accumulation inside the junction box, improving the heat dissipation capacity of the photovoltaic junction box, reducing the probability of photovoltaic junction box failure, and thus improving the safety of photovoltaic module use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the top structure inside the photovoltaic junction box provided in this embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the bottom structure inside the photovoltaic junction box provided in this embodiment of the utility model;

[0025] Figure 3 This is an exploded view of the photovoltaic junction box provided in this embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the connection between the diode and the conductive component provided in this embodiment of the utility model;

[0027] Figure 5 This is a schematic diagram of the connection between the diode, conductive component, and heat sink provided in an embodiment of this utility model;

[0028] Figure 6 This is a schematic diagram of the first structure of the first heat sink provided in this embodiment of the utility model;

[0029] Figure 7 This is a schematic diagram of a structure of the second type of heat sink provided in this embodiment of the present utility model;

[0030] Figure 8 This is a schematic diagram of the first structure of the third type of heat dissipation component provided in this utility model embodiment;

[0031] Figure 9 This is a schematic diagram of the second structure of the first heat sink provided in this embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the second structure of the third heat sink provided in this embodiment of the present invention;

[0033] Figure 11This is a schematic diagram of the third structure of the first heat sink provided in this embodiment of the utility model;

[0034] Figure 12 This is a schematic diagram of the third structure of the third type of heat sink provided in this embodiment of the utility model;

[0035] Figure 13 This is a schematic diagram of the structure of the conductive component provided in this embodiment of the utility model.

[0036] In the picture:

[0037] 1. Junction box body; 2. Heat sink; 3. First diode; 4. Second diode; 5. First conductive component; 6. Second conductive component; 7. Third conductive component; 8. Cable; 9. Box cover;

[0038] 21. Welding section; 22. First heat dissipation section; 221. First heat dissipation plate; 222. Heat dissipation base plate; 223. First extended heat dissipation plate; 224. Second extended heat dissipation plate; 23. Second heat dissipation section; 24. Third heat dissipation section; 25. Fourth heat dissipation section; 251. Fourth heat dissipation plate; 252. Heat dissipation top plate;

[0039] 51. First conductive sheet; 52. First folding plate;

[0040] 61. Second conductive sheet; 62. Second folding plate;

[0041] 71. Third conductive sheet; 72. Third folding plate. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0046] like Figures 1 to 3 As shown, this embodiment provides a photovoltaic junction box, which includes a junction box body 1 and a heat sink 2, a first diode 3, a second diode 4, a first conductive element 5, a second conductive element 6, and a third conductive element 7 disposed within the junction box body 1. The two pins of the first diode 3 are connected to the first conductive element 5 and the second conductive element 6, respectively. The two pins of the second diode 4 are connected to the second conductive element 6 and the third conductive element 7, respectively. The heat sink 2 includes a soldering part 21 and a first heat dissipation part 22. The soldering part 21 is connected to the pins of the first diode 3 or the second diode 4. The first heat dissipation part 22 extends towards the bottom of the junction box body 1 and is configured to conduct the heat generated by the first diode 3 or the second diode 4 to the bottom of the junction box body 1.

[0047] The photovoltaic junction box provided in this embodiment is suitable for a four-segment module. The junction box body 1 contains a first diode 3 and a second diode 4. The two pins of the first diode 3 are connected to a first conductive element 5 and a second conductive element 6, respectively. The two pins of the second diode 4 are connected to the second conductive element 6 and a third conductive element 7, respectively. The soldering part 21 of the heat sink 2 is connected to the pins of the diodes. The heat generated when the diodes are working is conducted to the bottom of the junction box body 1 through the soldering part 21 and the first heat sink 22. The bottom of the junction box body 1 is in contact with the glass portion of the photovoltaic module. The heat is then conducted from the bottom of the junction box body 1 to the glass portion of the photovoltaic module, enhancing the heat dissipation effect, preventing heat accumulation inside the junction box body 1, improving the heat dissipation capacity of the photovoltaic junction box, reducing the probability of photovoltaic junction box failure, and thus improving the safety of photovoltaic module use.

[0048] The first conductive element 5, the second conductive element 6, and the third conductive element 7 are all made of copper. Copper has high conductivity, but its cost is also high. Therefore, the heat sink 2 is made of iron or aluminum, or other materials with heat dissipation properties. No specific limitation is made here. The heat sink 2 has a heat dissipation function, and its cost is lower than that of copper. Alternatively, the heat sink 2 can be made of copper, which has better heat dissipation performance than iron or aluminum. Some of the heat generated by the diode during operation can also be dissipated through the first conductive element 5, the second conductive element 6, and the third conductive element 7. However, the heat dissipation capacity of the conductive elements is limited; therefore, the heat sink 2 is installed inside the junction box 1.

[0049] like Figures 3 to 5 As shown, in some embodiments, the first diode 3 and the second diode 4 are spaced apart along the length of the junction box 1. A cable 8 is provided at one end of the junction box 1 along its length. The first diode 3 is bent near the cable 8 and contacts the cable 8. The other pin of the first diode 3 and both pins of the second diode 4 are straight pins. The two pins of the second diode 4 are respectively connected to heat sinks 2. The heat generated by the second diode 4 during operation, as well as the heat inside the junction box 1, is dissipated through the two heat sinks 2. Alternatively, the other pin of the first diode 3 is connected to a heat sink 2, and the heat generated by the first diode 3 during operation, as well as the heat inside the junction box 1, is dissipated through the heat sink 2 and the cable 8. Alternatively, both pins of the second diode 4 and the other pin of the first diode 3 are connected to heat sinks 2, and the heat generated by both diodes during operation, as well as the heat inside the junction box 1, is dissipated through the heat sink 2 and the cable 8.

[0050] like Figures 5 to 8 As shown, in some embodiments, the first heat dissipation part 22 includes at least one first heat dissipation plate 221. One end of the first heat dissipation plate 221 is connected to the edge of the welding part 21, and the other end of the first heat dissipation plate 221 extends toward the bottom of the junction box 1 and is bent to form a heat dissipation base plate 222 parallel to the bottom of the junction box 1. A first extended heat dissipation plate 223 protrudes from one side edge of the heat dissipation base plate 222 and extends toward the side wall of the junction box 1, increasing the heat dissipation area and improving the heat dissipation efficiency of the photovoltaic junction box. The specific edge of the first extended heat dissipation plate 223 on the heat dissipation base plate 222 needs to be set according to the space inside the junction box 1, and the extension length of the heat dissipation base plate 222 also needs to be set according to the space inside the junction box 1.

[0051] The heat dissipation base plate 222 can contact the bottom of the junction box 1, or the heat dissipation base plate 222 can be set as close as possible to the bottom of the junction box 1 to improve heat dissipation efficiency. The first extended heat dissipation plate 223 can contact the side wall of the junction box 1, or the first extended heat dissipation plate 223 can be set as close as possible to the side wall of the junction box 1.

[0052] Optionally, such as Figure 6 and Figure 8 As shown, the first heat dissipation part 22 includes two first heat dissipation plates 221. The two first heat dissipation plates 221 are connected to the adjacent edges of the welding part 21 to increase the heat dissipation area and improve the heat dissipation efficiency of the photovoltaic junction box. The first extended heat dissipation plates 223 corresponding to the two first heat dissipation plates 221 can be arranged in a regular manner in a counterclockwise or clockwise direction, or they can extend in the same direction. The specific structure needs to be set according to the space inside the junction box 1, and is not specifically limited here.

[0053] Optionally, such as Figure 7 As shown, the first heat dissipation part 22 includes a first heat dissipation plate 221. A second extended heat dissipation plate 224 is provided on the side opposite to the first extended heat dissipation plate 223 of the heat dissipation base plate 222. One end of the second extended heat dissipation plate 224 is connected to the heat dissipation base plate 222, and the other end of the second extended heat dissipation plate 224 extends toward the side of the welding part 21, which can make full use of the space inside the junction box 1 to increase the heat dissipation area.

[0054] The aforementioned welding part 21 has a plate-like structure, and the first heat sink 221 is connected to the edge of the welding part 21. The welding part 21 has a large connection area with the diode pins, which increases the stability of the connection between the heat sink 2 and the diode. Optionally, the welding part 21 is connected to the diode pins through a welding process, and the diode pins are connected to the conductive components through a welding process.

[0055] like Figure 9 and Figure 10 As shown, in some embodiments, the heat sink 2 further includes a second heat sink 23. One end of the second heat sink 23 is connected to the side of the welding part 21 near the side wall of the junction box 1, and the other end of the second heat sink 23 extends toward the bottom of the junction box 1. The second heat sink 23 is configured to conduct the heat generated by the first diode 3 or the second diode 4 to the side wall of the junction box 1, thereby improving the heat dissipation capacity of the photovoltaic junction box.

[0056] The second heat dissipation part 23 includes a second heat dissipation plate. One end of the second heat dissipation plate is connected at an angle to the edge of the welding part, and the other end of the second heat dissipation plate extends toward the bottom of the junction box 1. The heat generated when the first diode 3 or the second diode 4 is working is transferred to the side wall of the junction box 1 through the second heat dissipation plate, thereby increasing the heat dissipation area through the side wall of the junction box 1.

[0057] See also Figure 9 and Figure 10 As shown, in some embodiments, the heat sink 2 further includes a third heat sink 24, which is disposed on the side of the first heat sink 22 near the side wall of the junction box 1. The third heat sink 24 is configured to conduct the heat generated by the first diode 3 or the second diode 4 to the side wall of the junction box 1. The heat is dissipated to the external environment through the side wall of the junction box 1, further improving the heat dissipation capacity of the photovoltaic junction box.

[0058] Optionally, the third heat dissipation part 24 includes a third heat dissipation plate. One end of the third heat dissipation plate is connected to the side of the first heat dissipation part 22 near the side wall of the junction box 1. Specifically, one end of the third heat dissipation plate is connected to the side of the heat dissipation base plate 222 near the side wall of the junction box 1, and the other end of the third heat dissipation plate extends toward the top of the junction box 1. The heat generated when the first diode 3 or the second diode 4 is working is conducted to the side wall of the junction box 1 through the third heat dissipation plate, and then the heat is conducted to the external environment through the side wall of the junction box 1, thereby increasing the heat dissipation area through the side wall of the junction box 1 and improving the heat dissipation efficiency of the photovoltaic junction box.

[0059] like Figure 11 and Figure 12 As shown, in some embodiments, the heat sink 2 further includes a fourth heat sink 25. One end of the fourth heat sink 25 is connected to the first heat sink 22, and the other end of the fourth heat sink 25 extends toward the top of the junction box 1. The fourth heat sink 25 is configured to conduct the heat generated by the first diode 3 or the second diode 4 to the top of the junction box 1. The junction box 1 is sealed with potting compound. The heat generated when the first diode 3 or the second diode 4 is working is conducted to the potting compound through the fourth heat sink 25. The opening of the junction box 1 is covered with a cover such as... Figure 3 As shown in the cover 9, heat is then conducted to the outside of the junction box 1 through the cover 9, which enhances the heat dissipation effect and has a large heat dissipation area.

[0060] Optionally, the fourth heat dissipation part 25 includes a fourth heat dissipation plate 251. One end of the fourth heat dissipation plate 251 is connected to the first heat dissipation part 22. Specifically, one end of the fourth heat dissipation plate 251 is connected to the side of the heat dissipation base plate 222 near the side wall of the junction box 1. The other end of the fourth heat dissipation plate 251 extends toward the top of the junction box 1 and is bent to form a heat dissipation top plate 252 parallel to the top of the junction box 1, thereby increasing the contact area between the fourth heat dissipation part 25 and the potting compound, and thus increasing the heat dissipation area.

[0061] For example, the structure of a heat sink is as follows: Figure 6As shown, two adjacent edges of the welding part 21 are respectively connected to a first heat sink 221. One end of the first heat sink 221 is connected to the welding part 21, and the other end of the first heat sink 221 extends toward the bottom of the junction box 1. The other end of the first heat sink 221 is connected to a heat sink base plate 222. A first extended heat sink 223 protrudes from the side of the heat sink base plate 222 away from the end of the first heat sink 221. Two first extended heat sinks 223 are arranged to extend in a counterclockwise direction. Further, as shown... Figure 9 As shown, the welding part 21 does not have the edge of the first heat sink 221, and the edge is connected to the second heat sink 23 near the side wall of the junction box 1. One end of the second heat sink 23 is connected to the edge of the welding part 21, and the other end of the second heat sink 23 extends toward the bottom of the junction box 1. Furthermore, as... Figure 9 As shown, the two heat dissipation base plates 222 are respectively connected to the third heat dissipation part 24 near the edge of the side wall of the junction box 1. Or, as Figure 11 As shown, one of the heat dissipation base plates 222 is connected to a third heat dissipation part 24 near the edge of the side wall of the junction box 1, and the other heat dissipation base plate 222 is connected to a fourth heat dissipation part 25 near the edge of the side wall of the junction box 1.

[0062] Another type of heat sink structure is as follows: Figure 8 As shown, two adjacent edges of the welding part 21 are respectively connected to a first heat sink 221. One end of the first heat sink 221 is connected to the welding part 21, and the other end of the first heat sink 221 extends toward the bottom of the junction box 1. The other end of the first heat sink 221 is connected to a heat sink base plate 222. One of the heat sink base plates 222 has a first extended heat sink 223 protruding from the end opposite to the first heat sink 221, and the other first extended heat sink 223 is disposed on one side of the heat sink base plate 222. The two first extended heat sinks 223 extend in the same direction. Further, as Figure 10 As shown, the welding part 21 does not have the edge of the first heat sink 221, and the edge is connected to the second heat sink 23 near the side wall of the junction box 1. One end of the second heat sink 23 is connected to the edge of the welding part 21, and the other end of the second heat sink 23 extends toward the bottom of the junction box 1. Furthermore, as... Figure 10 As shown, the two heat dissipation base plates 222 are respectively connected to the third heat dissipation part 24 near the edge of the side wall of the junction box 1. Or, as Figure 12 As shown, one of the heat dissipation base plates 222 is connected to a third heat dissipation part 24 near the edge of the side wall of the junction box 1, and the other heat dissipation base plate 222 is connected to a fourth heat dissipation part 25 near the edge of the side wall of the junction box 1.

[0063] Another type of heat sink structure is as follows: Figure 7As shown, a first heat sink 221 is connected to one edge of the welding part 21. One end of the first heat sink 221 is connected to the welding part 21, and the other end of the first heat sink 221 extends toward the bottom of the junction box 1. A heat sink base plate 222 is connected to the other end of the first heat sink 221. A first extended heat sink 223 and a second extended heat sink 224 are respectively provided on opposite sides of the heat sink base plate 222. The other end of the second extended heat sink 224 extends toward one side of the welding part 21. Further, the welding part 21 does not have an edge with the first heat sink 221, and a second heat sink 23 is connected to this edge near the side wall of the junction box 1. One end of the second heat sink 23 is connected to the edge of the welding part 21, and the other end of the second heat sink 23 extends toward the bottom of the junction box 1. Furthermore, the heat dissipation base plate 222 is connected to the edge of the side wall of the junction box 1 with a third heat dissipation part 24 or a fourth heat dissipation part 25, or the first extended heat dissipation plate 223 is provided with a third heat dissipation part 24 or a fourth heat dissipation part 25 near the side wall of the junction box 1, or the second extended heat dissipation plate 224 is provided with a third heat dissipation part 24 or a fourth heat dissipation part 25 near the side wall of the junction box 1.

[0064] Combination Figure 4 and Figure 13 As shown, in some embodiments, the first conductive element 5 includes a first conductive sheet 51, and one pin of the first diode 3 is connected to the first conductive sheet 51. The first conductive sheet 51 performs the function of conducting electricity, so copper, a material with high conductivity, is generally selected. The heat generated when the first diode 3 is working is mainly dissipated through the heat sink 2. Therefore, the part connected to the pin of the first diode 3 is set with a sheet structure, which reduces the volume of the first conductive sheet 51, thereby reducing the amount of copper material used and achieving cost reduction.

[0065] The second conductive component 6 includes a second conductive sheet 61. The other pin of the first diode 3 and one pin of the second diode 4 are respectively connected to the second conductive sheet 61. The second conductive sheet 61 performs the conductive function, so it is generally made of copper, a material with high conductivity. The heat generated by the first diode 3 and the second diode 4 during operation is mainly dissipated through the heat sink 2. Therefore, by setting the connection points with the pins of the first diode 3 and the second diode 4 in a sheet-like structure, the volume of the second conductive sheet 61 is reduced, thereby reducing the amount of copper used and achieving cost reduction.

[0066] The third conductive element 7 includes a third conductive sheet 71, and another pin of the second diode 4 is connected to the third conductive sheet 71. The third conductive sheet 71 is responsible for conducting electricity, so copper, which has high conductivity, is generally chosen as the material. The heat generated when the second diode 4 is working is mainly dissipated through a heat sink. Therefore, the part connected to the pin of the second diode 4 is designed as a sheet structure, which reduces the volume of the third conductive sheet 71 and thus reduces the amount of copper used, thereby reducing costs.

[0067] Optionally, a first folding plate 52 is provided on the edge of the first conductive sheet 51 near the side wall of the junction box 1. One end of the first folding plate 52 is connected to the first conductive sheet 51, and the other end of the first folding plate 52 extends toward the bottom of the junction box 1. The first folding plate 52 is configured to conduct the heat generated by the first diode 3 to the side wall of the junction box 1. The heat generated by the first diode 3 when it is working can be conducted to the side wall of the junction box 1 through the first folding plate 52, and then dissipated to the external environment through the side wall of the junction box 1, thereby improving the heat dissipation efficiency of the photovoltaic junction box.

[0068] A second folding plate 62 is provided on the edge of the second conductive sheet 61 near the side wall of the junction box 1. One end of the second folding plate 62 is connected to the second conductive sheet 61, and the other end of the second folding plate 62 extends toward the bottom of the junction box 1. The second folding plate 62 is configured to conduct the heat generated by the first diode 3 and the second diode 4 to the side wall of the junction box 1. The heat generated by the first diode 3 and the second diode 4 during operation can be conducted to the side wall of the junction box 1 through the second folding plate 62, and then dissipated to the external environment through the side wall of the junction box 1, thereby improving the heat dissipation efficiency of the photovoltaic junction box.

[0069] A third folding plate 72 is provided on the edge of the third conductive sheet 71 near the side wall of the junction box 1. One end of the third folding plate 72 is connected to the third conductive sheet 71, and the other end of the third folding plate 72 extends toward the bottom of the junction box 1. The third folding plate 72 is configured to conduct the heat generated by the second diode 4 to the side wall of the junction box 1. The heat generated by the second diode 4 when it is working can be conducted to the side wall of the junction box 1 through the third folding plate 72, and then dissipated to the external environment through the side wall of the junction box 1, thereby improving the heat dissipation efficiency of the photovoltaic junction box.

[0070] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A photovoltaic junction box, characterized in that, The device includes a junction box (1) and a heat sink (2), a first diode (3), a second diode (4), a first conductive element (5), a second conductive element (6), and a third conductive element (7) disposed within the junction box (1). The two pins of the first diode (3) are connected to the first conductive element (5) and the second conductive element (6), respectively. The two pins of the second diode (4) are connected to the second conductive element (6) and the third conductive element (7), respectively. The heat sink (2) includes a soldering part (21) and a first heat dissipation part (22). The soldering part (21) is connected to the pin of the first diode (3) or the pin of the second diode (4). The first heat dissipation part (22) extends toward the bottom of the junction box (1) and is configured to conduct the heat generated by the first diode (3) or the second diode (4) to the bottom of the junction box (1).

2. The photovoltaic junction box according to claim 1, characterized in that, The first heat dissipation part (22) includes at least one first heat dissipation plate (221), one end of the first heat dissipation plate (221) is connected to the edge of the welding part (21), and the other end of the first heat dissipation plate (221) extends toward the bottom of the junction box (1) and is bent to form a heat dissipation base plate (222) parallel to the bottom of the junction box (1). A first extended heat dissipation plate (223) is provided on one side edge of the heat dissipation base plate (222), and the first extended heat dissipation plate (223) extends toward the side wall of the junction box (1).

3. The photovoltaic junction box according to claim 2, characterized in that, The first heat dissipation part (22) includes two first heat dissipation plates (221), which are connected to the adjacent edges of the welding part (21).

4. The photovoltaic junction box according to claim 2, characterized in that, The first heat dissipation part (22) includes a first heat dissipation plate (221). The heat dissipation base plate (222) is provided with a second extended heat dissipation plate (224) on the side opposite to the first extended heat dissipation plate (223). One end of the second extended heat dissipation plate (224) is connected to the heat dissipation base plate (222), and the other end of the second extended heat dissipation plate (224) extends toward the side of the welding part (21).

5. The photovoltaic junction box according to any one of claims 1-4, characterized in that, The heat sink (2) further includes a second heat sink (23), one end of which is connected to the side of the welding part (21) near the side wall of the junction box (1), and the other end of which extends toward the bottom of the junction box (1). The second heat sink (23) is configured to conduct the heat generated by the first diode (3) or the heat generated by the second diode (4) to the side wall of the junction box (1).

6. The photovoltaic junction box according to any one of claims 1-4, characterized in that, The heat sink (2) further includes a third heat sink (24), which is disposed on the side of the first heat sink (22) near the side wall of the junction box (1). The third heat sink (24) is configured to conduct the heat generated by the first diode (3) or the second diode (4) to the side wall of the junction box (1).

7. The photovoltaic junction box according to any one of claims 1-4, characterized in that, The heat sink (2) further includes a fourth heat sink (25), one end of which is connected to the first heat sink (22), and the other end of which extends toward the top of the junction box (1). The fourth heat sink (25) is configured to conduct the heat generated by the first diode (3) or the second diode (4) to the top of the junction box (1).

8. The photovoltaic junction box according to claim 7, characterized in that, The fourth heat dissipation part (25) includes a fourth heat dissipation plate (251), one end of which is connected to the first heat dissipation part (22), and the other end of which extends toward the top of the junction box (1) and is bent to form a heat dissipation top plate (252) parallel to the top of the junction box (1).

9. The photovoltaic junction box according to any one of claims 1-4, characterized in that, The first diode (3) and the second diode (4) are spaced apart along the length of the junction box (1). Along the length of the junction box (1), a cable (8) is provided at one end of the junction box (1). The first diode (3) is bent near the pin of the cable (8) and contacts the cable (8). The other pin of the first diode (3) and the two pins of the second diode (4) are both straight pins. The two pins of the second diode (4) are respectively connected to the heat sink (2), and / or the other pin of the first diode (3) is connected to the heat sink (2).

10. The photovoltaic junction box according to any one of claims 1-4, characterized in that, The first conductive element (5) includes a first conductive sheet (51), and one pin of the first diode (3) is connected to the first conductive sheet (51); The second conductive element (6) includes a second conductive sheet (61), and another pin of the first diode (3) and a pin of the second diode (4) are respectively connected to the second conductive sheet (61); The third conductive element (7) includes a third conductive sheet (71), and another pin of the second diode (4) is connected to the third conductive sheet (71).

11. The photovoltaic junction box according to claim 10, characterized in that, The first conductive sheet (51) is provided with a first folding plate (52) near the edge of the side wall of the junction box (1). One end of the first folding plate (52) is connected to the first conductive sheet (51), and the other end of the first folding plate (52) extends toward the bottom of the junction box (1). The first folding plate (52) is configured to conduct the heat generated by the first diode (3) to the side wall of the junction box (1). And / or, the second conductive sheet (61) is provided with a second folding plate (62) near the edge of the side wall of the junction box (1), one end of the second folding plate (62) is connected to the second conductive sheet (61), and the other end of the second folding plate (62) extends toward the bottom of the junction box (1). The second folding plate (62) is configured to conduct the heat generated by the first diode (3) and the second diode (4) to the side wall of the junction box (1); And / or, the third conductive sheet (71) is provided with a third folding plate (72) near the edge of the side wall of the junction box (1), one end of the third folding plate (72) is connected to the third conductive sheet (71), and the other end of the third folding plate (72) extends toward the bottom of the junction box (1). The third folding plate (72) is configured to conduct the heat generated by the second diode (4) to the side wall of the junction box (1).

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