Photovoltaic junction box

Abstract

The utility model belongs to photovoltaic technical field discloses a kind of photovoltaic terminal box, including box body and the electrically conductive sheet being arranged in the box body, first diode and second diode. Among them, first diode and second diode are spaced along the length direction of box body;Two bus bars among four bus bars are distributed along the length direction of box body, and the other two bus bars are distributed along the width direction of box body, and the connecting end of four bus bars extends to box body and is electrically connected with electrically conductive sheet, and all be located between first diode and second diode. The photovoltaic terminal box is by the connecting end of two bus bars distributed along the length direction of box body and the connecting end of two bus bars distributed along the width direction of box body are all set between first diode and second diode in box body, so that the connecting end of four bus bars is close to each other, to facilitate four bus bars simultaneously with electrically conductive sheet and connect operation, so that the connection operation of bus bar is convenient and fast.

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] The photovoltaic junction box is an important part of the photovoltaic module, serving both connection and protection functions. Currently, most photovoltaic modules have two busbars, and the photovoltaic junction box is used to connect the two busbars.

[0003] However, photovoltaic modules are now starting to adopt four-cell technology to improve the power of existing photovoltaic modules. Due to the adjustment of photovoltaic modules, the original junction boxes are no longer suitable for photovoltaic modules using four-cell technology. In order to adapt to the photovoltaic modules, the existing technology is to merge the original photovoltaic junction boxes into a new junction box. However, the new junction box requires an increased number of busbars to be welded, and is limited by the arrangement of the busbars, which makes the connection operation when connecting the busbars inconvenient. Utility Model Content

[0004] The purpose of this utility model is to provide a photovoltaic junction box that makes the connection operation of the busbar convenient and quick.

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

[0006] A photovoltaic junction box is used to connect four busbars. The photovoltaic junction box includes a box body and a conductive sheet, a first diode, and a second diode disposed in the box body. The first diode and the second diode are distributed at intervals along the length direction of the box body and are both conductively connected to the conductive sheet.

[0007] Two of the four busbars are distributed along the length of the housing, and the other two are distributed along the width of the housing. The connecting ends of the four busbars are all located inside the housing and are electrically connected to the conductive sheet, and are all located between the first diode and the second diode.

[0008] As an alternative, the first diode has two first pins, and the second diode has two second pins;

[0009] The conductive sheet includes a first conductive sheet, a second conductive sheet, and a third conductive sheet. The two first pins are electrically connected to the first conductive sheet and the third conductive sheet, respectively, and the two second pins are electrically connected to the second conductive sheet and the third conductive sheet, respectively.

[0010] The connecting ends of the two busbars distributed along the length of the box are conductively connected to the first conductive sheet and the second conductive sheet, respectively; the two busbars distributed along the width of the box are both conductively connected to the third conductive sheet.

[0011] As an optional solution, the housing is provided with a first guide groove corresponding to the first conductive sheet, a second guide groove corresponding to the second conductive sheet, and a third guide groove corresponding to the third conductive sheet, wherein the first guide groove, the second guide groove, and the third guide groove are all located between the first diode and the second diode;

[0012] The connecting ends of the two busbars distributed along the length of the box are respectively inserted into the first guide groove and the second guide groove, and are electrically connected to the first conductive sheet and the second conductive sheet respectively;

[0013] Two busbars distributed along the width direction of the box are interconnected, and the connecting end of one of the two busbars distributed along the width direction of the box passes through the third guide groove and is electrically connected to the third conductive sheet.

[0014] As an alternative, the box body has two outwardly protruding grooves on one side wall along its width direction, and the two protruding grooves correspond to the first guide groove and the second guide groove, respectively.

[0015] As an alternative, the first guide groove is composed of two spaced-apart first vertical plates disposed in the box body. The height of the first vertical plate away from the first conductive sheet is equal to the height of the first conductive sheet and is higher than the first vertical plate close to the first conductive sheet.

[0016] The second guide groove is composed of two spaced second vertical plates disposed on the box body. The height of the second vertical plate away from the second conductive sheet is equal to the height of the second conductive sheet and is higher than the second vertical plate close to the second conductive sheet.

[0017] The third guide groove is composed of two spaced third vertical plates disposed on the box body. The height of the third vertical plate away from the third conductive sheet is equal to the height of the third conductive sheet and is higher than the third vertical plate close to the third conductive sheet.

[0018] As an alternative, the third conductive sheet includes a first conductive portion and a second conductive portion that are interconnected, with the first conductive portion, the first conductive sheet, the second conductive portion, and the second conductive sheet distributed at intervals in sequence;

[0019] The first diode is disposed between the first conductive part and the first conductive sheet, and the two first pins are conductively connected to the first conductive part and the first conductive sheet respectively; the second diode is disposed between the second conductive part and the second conductive sheet, and the two second pins are conductively connected to the second conductive part and the second conductive sheet respectively.

[0020] Both of the busbars distributed along the width of the box are electrically connected to the second conductive part.

[0021] As an alternative, the first conductive portion has bent edges on its three sides, except for the side facing the first diode.

[0022] As an alternative, both the first conductive sheet and the second conductive sheet have notches on one side along the width direction of the housing, and the first diode and the second diode are respectively disposed in the two notches.

[0023] As an alternative, the first pins near the second diode all coincide with the projection portion of a busbar distributed along the length direction of the housing in the depth direction of the housing;

[0024] The second pin near the first diode and the projection portion of the busbar distributed along the width direction of the housing in the depth direction of the housing coincide.

[0025] As an optional solution, the photovoltaic junction box also includes a cable that is electrically connected to the second conductive sheet, and the cable is in contact with the second pin.

[0026] The beneficial effects of this utility model are:

[0027] The photovoltaic junction box provided by this utility model sets the connection ends of two busbars distributed along the length direction of the box and the connection ends of two busbars distributed along the width direction of the box between the first diode and the second diode inside the box, so that the connection ends of the four busbars are close to each other, so as to facilitate the connection operation of the four busbars with the conductive sheet at the same time, making the connection operation of the busbars convenient and quick. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the photovoltaic junction box provided in this embodiment of the utility model;

[0029] Figure 2 This is a structural schematic diagram of the photovoltaic junction box (front) and busbar provided in this embodiment of the utility model;

[0030] Figure 3This is a structural schematic diagram of the photovoltaic junction box (back side) and busbar provided in this embodiment of the utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the conductive sheet involved in the embodiment of this utility model;

[0032] Figure 5 This is a schematic diagram of the structure of the third conductive sheet involved in the embodiment of this utility model;

[0033] Figure 6 yes Figure 1 Enlarged view of the structure at point A in the middle;

[0034] Figure 7 This is a schematic diagram of the cable and second pin involved in the embodiment of this utility model.

[0035] In the picture:

[0036] 100. Busbar; 101. Connecting end;

[0037] 1. Box body; 11. Partition plate; 12. First guide groove; 121. First vertical plate; 13. Second guide groove; 131. Second vertical plate; 14. Third guide groove; 141. Third vertical plate; 15. Raised groove;

[0038] 2. First diode; 21. First pin;

[0039] 3. Second diode; 31. Second pin;

[0040] 4. First conductive sheet;

[0041] 5. Second conductive sheet; 51. Second potting port;

[0042] 6. Third conductive sheet; 61. First conductive part; 611. Bending edge; 612. First glue inlet; 62. Second conductive part; 63. Connecting part;

[0043] 7. Gap;

[0044] 8. Cables. Detailed Implementation

[0045] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0046] 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 or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or 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 according to the specific circumstances.

[0047] In the description of this utility model, unless otherwise expressly 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.

[0048] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0049] like Figures 1-3 As shown, this utility model embodiment provides a photovoltaic junction box for adapting to photovoltaic modules using quad-segment technology, that is, the photovoltaic junction box can connect four busbars 100 on the photovoltaic module.

[0050] The photovoltaic junction box includes a box body 1 and a conductive sheet, a first diode 2, and a second diode 3 disposed within the box body 1. The first diode 2 and the second diode 3 are spaced apart along the length of the box body 1 (i.e., the X-axis direction in the diagram). Two of the four busbars 100 are distributed along the length of the box body 1, and the other two are distributed along the width of the box body 1 (i.e., the Y-axis in the diagram). The connecting ends 101 of the four busbars 100 extend into the box body 1 and are conductively connected to the conductive sheet, and are all located between the first diode 2 and the second diode 3.

[0051] The photovoltaic junction box places the connection ends 101 of two busbars 100 distributed along the length direction of the box body 1 and the connection ends 101 of two busbars 100 distributed along the width direction of the box body 1 between the first diode 2 and the second diode 3 inside the box body 1, so that the connection ends 101 of the four busbars 100 are close to each other, so as to facilitate the simultaneous connection operation of the four busbars 100 with the conductive sheet, making the connection operation of the busbars 100 convenient and quick.

[0052] In this embodiment, the connecting ends 101 of the busbar 100 and the conductive sheet can be welded using a welding device. That is, the connecting ends 101 of the four busbars 100 are close to each other and located in the area between the first diode 2 and the second diode 3 of the housing 1. The welding device can complete the welding operation of the four busbars 100 at one time.

[0053] Specifically, the first diode 2 has two first pins 21, and the second diode 3 has two second pins 31. The conductive sheet includes a first conductive sheet 4, a second conductive sheet 5, and a third conductive sheet 6. The two first pins 21 are electrically connected to the first conductive sheet 4 and the third conductive sheet 6, respectively, and the two second pins 31 are electrically connected to the second conductive sheet 5 and the third conductive sheet 6, respectively. This structure allows the heat generated by the first diode 2 to be transferred to the first conductive sheet 4 and the third conductive sheet 6 through the two first pins 21, and also allows the heat generated by the second diode 3 to be transferred to the second conductive sheet 5 and the third conductive sheet 6 through the two second pins 31. Furthermore, the connection ends 101 of the two busbars 100 distributed along the length of the housing 1 are electrically connected to the first conductive sheet 4 and the second conductive sheet 5, respectively; the remaining two busbars 100 are distributed along the width of the housing 1 and are both electrically connected to the third conductive sheet 6. This structure allows the two busbars 100 along the length of the housing 1 to conduct heat from the first conductive sheet 4 and the second conductive sheet 5, respectively, and the two busbars 100 along the width of the housing 1 to conduct heat from the third conductive sheet 6, respectively.

[0054] In this embodiment, two first pins 21 are welded to the first conductive sheet 4 and the third conductive sheet 6, respectively; two second pins 31 are welded to the second conductive sheet 5 and the third conductive sheet 6, respectively; two busbars 100 distributed along the length of the housing 1 are welded to the first conductive sheet 4 and the second conductive sheet 5, respectively; two busbars 100 distributed along the width of the housing 1 are both welded to the third conductive sheet 6, or two busbars 100 distributed along the width of the housing 1 are welded together, and one of the busbars 100 is welded to the third conductive sheet 6. That is, the three welding heads of the welding equipment press down simultaneously and abut against the first conductive sheet 4, the second conductive sheet 5, and the third conductive sheet 6, respectively, to achieve simultaneous welding.

[0055] Furthermore, such as Figure 4As shown, both the first conductive sheet 4 and the second conductive sheet 5 have notches 7 on one side along the width direction of the housing 1. The first diode 2 and the second diode 3 are respectively disposed within the two notches 7. The two busbars 100 distributed along the length direction of the housing 1 do not coincide with the projections of the two notches 7 in the depth direction of the housing 1. That is, along the width direction of the housing 1, the busbars 100 and the corresponding notches 7 are staggered. By creating notches 7 on the first conductive sheet 4 and the second conductive sheet 5, the first diode 2 and the second diode 3 can be distributed along the width direction of the housing 1 close to the side of the housing 1, making the structure compact. Furthermore, the proximity of the first diode 2 and the second diode 3 to the side of the housing 1 allows some of the heat from the first diode 2 and the second diode 3 to be dissipated through the housing 1, improving heat dissipation capacity.

[0056] To further improve the heat dissipation capacity of this photovoltaic junction box, refer to... Figure 2 As shown, the first pin 21 near the second diode 3 coincides with the projection of a busbar 100 (located on the same side as the first diode 2 along the length of the housing 1) in the depth direction of the housing 1; the second pin 31 near the first diode 2 coincides with the projection of the busbar 100 in the depth direction of the housing 1 along the width direction of the housing 1. This structure, by placing a portion of the first pin 21 below the corresponding busbar 100 and a portion of the second pin 31 below the corresponding busbar 100, reduces heat transfer time, allowing the first diode 2 and the second diode 3 to quickly transfer heat to the corresponding busbar 100 through the first pin 21 and the second pin 31 respectively, effectively improving heat dissipation efficiency.

[0057] Optionally, the first pin 21 near the second diode 3 and the second pin 31 near the first diode 2 can be bent so that the projected portions of the first pin 21 and the corresponding busbar 100 in the depth direction of the housing 1 coincide, and the projected portions of the second pin 31 and the corresponding busbar 100 in the depth direction of the housing 1 also coincide. Simultaneously, the other first pin 21 and the other second pin 31 are also bent, increasing the contact area between the other first pin 21 and the first conductive part 61, and increasing the contact area between the other second pin 31 and the second conductive sheet 5, resulting in higher heat transfer efficiency.

[0058] Specifically, for example Figure 4As shown, the third conductive sheet 6 includes a first conductive part 61 and a second conductive part 62 that are interconnected. The first conductive part 61 and the second conductive part 62 are connected by a connecting part 63. The first conductive part 61, the first conductive sheet 4, the second conductive part 62, and the second conductive sheet 5 are distributed sequentially at intervals. The first diode 2 is disposed in the notch 7 of the first conductive sheet 4 and is located between the first conductive part 61 and the first conductive sheet 4. Its two first pins 21 are electrically connected to the first conductive part 61 and the first conductive sheet 4 respectively (i.e., welded). The second diode 3 is disposed in the notch 7 of the second conductive sheet 5 and is located between the second conductive part 62 and the second conductive sheet 5. Its two second pins 31 are electrically connected to the second conductive part 62 and the second conductive sheet 5 respectively (i.e., welded). By setting the third conductive sheet 6 as an interconnected first conductive part 61 and second conductive part 62, it is more convenient to connect the first diode 2 and the second diode 3 to the third conductive sheet 6, and the overall component layout is more reasonable.

[0059] Optionally, such as Figure 5 As shown, the first conductive part 61 has bent edges 611 on the three sides other than the side edge facing the first diode 2. By providing multiple bent edges 611 on the first conductive part 61, the heat dissipation area can be increased, thereby improving the heat dissipation efficiency.

[0060] Optionally, refer to Figure 1 The box body 1 is provided with a partition plate 11, which is sandwiched between the first conductive part 61 and the first conductive sheet 4. The partition plate 11 can prevent the first conductive part 61 and the first conductive sheet 4 from contacting each other. Specifically, the first conductive part 61 and the first conductive sheet 4 are provided with slots on opposite sides, and the partition plate 11 is confined within the two slots.

[0061] Optionally, refer to Figure 2 The first conductive part 61 has two first potting ports 612 on one side of the box body 1 along the width direction of the box body 1, and potting can be achieved through the two first potting ports 612; and when the second diode 3 is disposed in the notch 7 of the second conductive sheet 5, there are also two second potting ports 51 between the second diode 3 and the second conductive sheet 5, which can also be used to achieve potting.

[0062] Optionally, the two busbars 100 distributed along the length of the housing 1 do not coincide with the projections of the first diode 2 and the second diode 3 onto the depth direction (i.e., the Z-axis direction in the figure) of the housing 1. That is, the two busbars 100 distributed along the length of the housing 1 are staggered from the first diode 2 and the second diode 3 in the width direction of the housing 1. Specifically, one busbar 100 and the first diode 2 are located on one side of the housing 1 along its length, and are staggered in the width direction of the housing 1; the other busbar 100 and the second diode 3 are located on the other side of the housing 1 along its length, and are staggered in the width direction of the housing 1. This photovoltaic junction box avoids the impact of the first diode 2 and the second diode 3 on the two busbars 100 distributed along the length of the box body 1 when the temperature of the two busbars 100 is too high. This prevents the busbars 100 from being locally hot and allows them to quickly conduct heat away from the conductive sheet, thus improving the heat dissipation effect.

[0063] To facilitate the welding of the connection ends 101 of the two busbars 100 along the length of the box body 1 to the first conductive sheet 4 and the second conductive sheet 5, respectively, and to avoid interference between the welding head of the welding equipment and the side wall of the box body 1, optionally, two outwardly protruding grooves 15 are provided on the side wall of the box body 1 near the busbars 100 along its width direction. The two grooves 15 correspond to the connection ends 101 of the two busbars 100, respectively, and can respectively avoid the two welding heads. Furthermore, by providing the groove structure 15 on the side wall of the box body 1, the structural strength of the box body 1 can also be increased.

[0064] In addition, glue can also be poured through the raised groove 15. Glue can be poured through the first glue pouring port 612, the second glue pouring port 51 and the raised groove 15, so that the glue pouring in the box 1 is more uniform and the filling is more complete.

[0065] Optionally, such as Figure 6As shown, the housing 1 is also provided with three first guide grooves 12, second guide grooves 13, and third guide grooves 14, respectively corresponding to the second conductive portions 62 of the first conductive sheet 4, the second conductive sheet 5, and the third conductive sheet 6. The first guide groove 12 corresponding to the first conductive sheet 4 and the second guide groove 13 corresponding to the second conductive sheet 5 are distributed at intervals along the length direction of the housing 1 and are located between the first conductive sheet 4 and the second conductive sheet 5. The third guide groove 14 corresponding to the second conductive portion 62 is distributed along the width direction of the housing 1 and is located between the side wall of the housing 1 and the second conductive portion 62. That is, the first guide groove 12, the second guide groove 13, and the third guide groove 14 are all provided in the housing 1 and are located between the first diode 2 and the second diode 3. The connection ends 101 of the two busbars 100 distributed along the length direction of the housing 1 pass through the corresponding first guide grooves 12 and second guide grooves 14. The two busbars 100 are electrically connected to the first conductive sheet 4 and the second conductive sheet 5 respectively in the groove 13. That is, the two busbars 100 pass through the first guide groove 12 and the second guide groove 13 from the bottom of the box body 1 and are respectively welded to the upper side of the first conductive sheet 4 and the second conductive sheet 5. After the two busbars 100 distributed along the width direction of the box body 1 are welded to each other, one of the busbars 100 passes through the third guide groove 14 corresponding to the second conductive part 62 and is electrically connected to the second conductive part 62 of the third conductive sheet 6. That is, the two busbars 100 are welded to each other. The connecting end 101 of one of the busbars 100 passes through the corresponding third guide groove 14 from the bottom of the box body 1 and is welded to the upper side of the second conductive part 62. By providing the first guide groove 12, the second guide groove 13 and the third guide groove 14 in the box body 1, the connection operation of the busbars 100 is convenient.

[0066] Specifically, the first guide groove 12 is composed of two spaced first vertical plates 121 disposed on the box body 1. The height of the first vertical plate 121 away from the first conductive sheet 4 (i.e., along the depth direction of the box body 1) is equal to the height of the first conductive sheet 4 and is higher than the first vertical plate 121 near the first conductive sheet 4. The second guide groove 13 is composed of two spaced second vertical plates 131 disposed on the box body 1. The height of the second vertical plate 131 away from the second conductive sheet 5 is equal to the height of the second conductive sheet 5 and is higher than the second vertical plate 131 near the second conductive sheet 5. The third guide groove 14 is composed of two spaced third vertical plates 141 disposed on the box body 1. The height of the third vertical plate 141 away from the second conductive part 62 is equal to the height of the second conductive part 62 and is higher than the third vertical plate 141 near the second conductive part 62. When the welding head welds the busbar 100 to the first conductive sheet 4, the welding head simultaneously abuts against the first conductive sheet 4 and the first vertical plate 121 away from the first conductive sheet 4, so that the first vertical plate 121 can play a supporting role; when the welding head welds the busbar 100 to the second conductive sheet 5, the welding head simultaneously abuts against the second conductive sheet 5 and the second vertical plate 131 away from the second conductive sheet 5, so that the second vertical plate 131 can play a supporting role; when the welding head welds the busbar 100 to the second conductive part 62, the welding head simultaneously abuts against the second conductive part 62 and the third vertical plate 141 away from the second conductive part 62, so that the third vertical plate 141 can play a supporting role; this structure makes the welding operation more convenient and the connection more secure.

[0067] Two first pins 21 are respectively soldered to the lower side of the first conductive part 61 and the first conductive sheet 4, and two second pins 31 are respectively soldered to the lower side of the second conductive part 62 and the second conductive sheet 5.

[0068] like Figure 7 and combined Figure 1 As shown, the photovoltaic junction box also includes a cable 8, which is electrically connected to the lower side of the second conductive sheet 5, and the cable 8 is in contact with the second pin 31. That is, the second pin 31 is soldered to the second conductive sheet 5, and the cable 8 is soldered to the second pin 31. This structural design allows some of the heat generated by the second diode 3 to be transferred to the cable 8 through the second pin 31, and the cable 8 conducts the heat out of the box body 1, further improving the heat dissipation efficiency.

[0069] 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 other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations 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 photovoltaic junction box is used to connect four busbars (100). It includes a box body (1) and a conductive sheet, a first diode (2) and a second diode (3) disposed in the box body (1). The first diode (2) and the second diode (3) are distributed at intervals along the length direction of the box body (1) and are both conductively connected to the conductive sheet. Two of the four busbars (100) are distributed along the length of the housing (1), and the other two are distributed along the width of the housing (1). The connection ends (101) of the four busbars (100) are located inside the housing (1) and are electrically connected to the conductive sheet, and are located between the first diode (2) and the second diode (3).

2. The photovoltaic junction box according to claim 1, characterized in that, The first diode (2) has two first pins (21), and the second diode (3) has two second pins (31); The conductive sheet includes a first conductive sheet (4), a second conductive sheet (5) and a third conductive sheet (6). The two first pins (21) are electrically connected to the first conductive sheet (4) and the third conductive sheet (6) respectively, and the two second pins (31) are electrically connected to the second conductive sheet (5) and the third conductive sheet (6) respectively. The connecting ends (101) of the two busbars (100) distributed along the length direction of the box (1) are electrically connected to the first conductive sheet (4) and the second conductive sheet (5), respectively; the two busbars (100) distributed along the width direction of the box (1) are electrically connected to the third conductive sheet (6).

3. The photovoltaic junction box according to claim 2, characterized in that, The housing (1) is provided with a first guide groove (12) corresponding to the first conductive sheet (4), a second guide groove (13) corresponding to the second conductive sheet (5) and a third guide groove (14) corresponding to the third conductive sheet (6). The first guide groove (12), the second guide groove (13) and the third guide groove (14) are all located between the first diode (2) and the second diode (3). The connecting ends (101) of the two busbars (100) distributed along the length direction of the box (1) are respectively inserted into the first guide groove (12) and the second guide groove (13), and are electrically connected to the first conductive sheet (4) and the second conductive sheet (5) respectively; Two busbars (100) distributed along the width direction of the box body (1) are connected to each other, and the connecting end (101) of one of the two busbars (100) distributed along the width direction of the box body (1) passes through the third guide groove (14) and is electrically connected to the third conductive sheet (6).

4. The photovoltaic junction box according to claim 3, characterized in that, The box body (1) has two outwardly protruding grooves (15) on one side wall along its width direction, and the two protruding grooves (15) correspond to the first guide groove (12) and the second guide groove (13) respectively.

5. The photovoltaic junction box according to claim 3, characterized in that, The first guide groove (12) is composed of two spaced first vertical plates (121) disposed on the box body (1). The height of the first vertical plate (121) away from the first conductive sheet (4) is equal to the height of the first conductive sheet (4) and both are higher than the first vertical plate (121) close to the first conductive sheet (4). The second guide groove (13) is composed of two spaced second vertical plates (131) disposed on the box body (1). The height of the second vertical plate (131) away from the second conductive sheet (5) is equal to the height of the second conductive sheet (5) and both are higher than the second vertical plate (131) close to the second conductive sheet (5). The third guide groove (14) is composed of two spaced third vertical plates (141) disposed on the box body (1). The height of the third vertical plate (141) away from the third conductive sheet (6) is equal to the height of the third conductive sheet (6) and both are higher than the third vertical plate (141) close to the third conductive sheet (6).

6. The photovoltaic junction box according to claim 2, characterized in that, The third conductive sheet (6) includes a first conductive part (61) and a second conductive part (62) that are connected to each other, and the first conductive part (61), the first conductive sheet (4), the second conductive part (62) and the second conductive sheet (5) are distributed in sequence at intervals; The first diode (2) is disposed between the first conductive part (61) and the first conductive sheet (4), and the two first pins (21) are electrically connected to the first conductive part (61) and the first conductive sheet (4) respectively. The second diode (3) is disposed between the second conductive part (62) and the second conductive sheet (5), and the two second pins (31) are electrically connected to the second conductive part (62) and the second conductive sheet (5) respectively. The two busbars (100) distributed along the width direction of the box body (1) are electrically connected to the second conductive part (62).

7. The photovoltaic junction box according to claim 6, characterized in that, The first conductive part (61) has a bent edge (611) on the other three sides except the side edge facing the first diode (2).

8. The photovoltaic junction box according to claim 2, characterized in that, The first conductive sheet (4) and the second conductive sheet (5) are provided with notches (7) on one side of the width direction of the box body (1), and the first diode (2) and the second diode (3) are respectively disposed in the two notches (7).

9. The photovoltaic junction box according to claim 2, characterized in that, The projection of the first pin (21) near the second diode (3) and a busbar (100) distributed along the length direction of the housing (1) in the depth direction of the housing (1) coincides; The projection of the second pin (31) near the first diode (2) and the busbar (100) distributed along the width direction of the housing (1) in the depth direction of the housing (1) coincides.

10. The photovoltaic junction box according to claim 2, characterized in that, The photovoltaic junction box also includes a cable (8), which is electrically connected to the second conductive sheet (5), and the cable (8) is in contact with the second pin (31).

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