Photovoltaic power semiconductor module junction box

Abstract

The utility model discloses a photovoltaic power semiconductor module terminal box, including box body and box cover, the box body and box cover form the accommodation space between, still include photovoltaic power semiconductor module, the photovoltaic power semiconductor module is located in the accommodation space, the box body includes bottom plate and outer frame, the photovoltaic power semiconductor module includes N group diode and with N group diode's PN pole electricity connection's electrically conductive body, N >=2, still be provided with M group in the accommodation space for the partition board of isolating heat mutual transfer in photovoltaic power semiconductor module, M >=1, in this structure, can isolate the mutual transfer of heat of heating site in photovoltaic power semiconductor module through the setting of partition board, thereby improve the current of photovoltaic power semiconductor module, improve the stability of terminal box.

Description

Technical Field

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

[0002] Junction boxes are a crucial component of photovoltaic (PV) modules, primarily used to improve the reliability and efficiency of PV systems. When a cell in a PV string experiences current mismatch due to shading, damage, or performance degradation, the PV power semiconductor module in the junction box provides a low-resistance bypass path for that cell, allowing current to flow around the faulty cell. This reduces hot spot effects, protects other normally functioning cells from damage, and maintains the overall power generation efficiency of the PV module.

[0003] At present, photovoltaic modules mostly use multiple split junction boxes, each containing one or more bypass diodes, which are electrically connected to the module busbars to realize circuit transmission.

[0004] When a junction box contains multiple bypass diodes, the heat generated by the bypass diodes can affect each other, leading to a decrease in the stability of the junction box and even affecting the maximum current that the photovoltaic power semiconductor module can pass through. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a photovoltaic power semiconductor module junction box that can improve the current of the photovoltaic power semiconductor module and maintain the stability of the junction box.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a photovoltaic power semiconductor module junction box, including a box body and a box cover, with an accommodating space formed between the box body and the box cover, and also including a photovoltaic power semiconductor module, the photovoltaic power semiconductor module being located within the accommodating space, the box body including a base plate and an outer frame, the photovoltaic power semiconductor module including N sets of diodes and a conductor electrically connected to the PN pole of the N sets of diodes, where N≥2, and the accommodating space is further provided with M sets of partitions for isolating heat transfer between the photovoltaic power semiconductor modules, where M≥1.

[0007] Furthermore, the base plate is provided with positioning posts, and the photovoltaic power semiconductor module is provided with through holes that cooperate with the positioning posts. The photovoltaic power semiconductor module is mounted on the base plate through the cooperation of the through holes and the positioning posts.

[0008] Furthermore, a support frame is provided on the base plate, and the photovoltaic power semiconductor module is mounted on the support frame.

[0009] Furthermore, the diode is arranged along the length of the photovoltaic power semiconductor module and connected to a conductor.

[0010] Furthermore, the base plate and the outer frame are detachably connected. The base plate is provided with a first locking device, and the outer frame is provided with a second locking device that cooperates with the first locking device. When the first locking device and the second locking device cooperate with each other, the base plate and the outer frame are locked.

[0011] Furthermore, the inner wall of the outer frame is provided with a protrusion that abuts against the side of the photovoltaic power semiconductor module.

[0012] Furthermore, the partition is connected to the inner wall of the outer frame, and the partition divides the accommodating space into multiple sub-spaces.

[0013] Furthermore, multiple diodes are connected to multiple conductors to form multiple first heating zones, and the multiple first heating zones are located in different subspaces.

[0014] Furthermore, the connection area between the conductor and the external busbar is the second heating zone, and multiple second heating zones are located in different subspaces.

[0015] Furthermore, multiple diodes are connected to a conductor to form multiple first heating areas, and the connection area between the conductor and the external busbar is a second heating area. The multiple first heating areas and the second heating areas are located in different subspaces.

[0016] Furthermore, busbar perforations are formed between adjacent conductors, or busbar perforations are opened on the conductors, or busbar perforations are formed in the gaps between conductors or boxes.

[0017] The beneficial effects of this utility model are:

[0018] 1. The partition in this structure can isolate the heat transfer between the heat-generating parts in the photovoltaic power semiconductor module, thereby increasing the current of the photovoltaic power semiconductor module and enhancing the stability of the junction box.

[0019] 2. The box in this structure includes a base plate and an outer frame. The photovoltaic power semiconductor module is mounted on the base plate, which facilitates the installation of the photovoltaic power semiconductor module. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the photovoltaic power semiconductor module junction box according to an embodiment of this application.

[0021] Figure 2 This is a schematic diagram of the internal structure of the photovoltaic power semiconductor module junction box according to an embodiment of this application.

[0022] Figure 3 This is an exploded view of the junction box of the photovoltaic power semiconductor module according to an embodiment of this application.

[0023] Figure 4 This is a schematic diagram of diode connections in the junction box of a photovoltaic power semiconductor module according to an embodiment of this application.

[0024] Figure 5 for Figure 3 Enlarged view of the structure at point A in the image.

[0025] The components in the diagram are labeled as follows: base plate 1, positioning post 11, support frame 12, first locking device 13, outer frame 2, second locking device 21, protrusion 22, box cover 3, accommodating space 4, first heating area 41, first connecting area 411, second connecting area 412, second heating area 42, third connecting area 421, fourth connecting area 422, fifth connecting area 423, diode 5, first diode 51, second diode 52, conductor 6, first conductor 61, second conductor 62, third conductor 63, through hole 69, partition 7, first partition 71, second partition 72, first busbar perforation 81, second busbar perforation 82, third busbar perforation 83. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] like Figure 1 As shown in the figure, an embodiment of this application discloses a photovoltaic power semiconductor module junction box, including a box body and a box cover 3, with a receiving space 4 formed between the box body and the box cover 3, and also including a photovoltaic power semiconductor module, which is located in the receiving space 4. The box body includes a base plate 1 and an outer frame 2. The photovoltaic power semiconductor module includes N sets of diodes and a conductor 6 electrically connected to the PN electrode of the N sets of diodes 5, where N≥2. The receiving space 4 is also provided with M sets of partitions 7 for isolating heat transfer between the photovoltaic power semiconductor modules, where M≥1.

[0028] Specifically, in the above structure, the number of diodes can be set according to actual needs, such as 2, 3, or 4. Similarly, the number of partitions 7 can also be set according to actual needs, such as 1, 2, or 3. Since some areas of the photovoltaic power semiconductor module will generate a lot of heat during operation, by setting partitions 7, the accommodating space 4 can be divided into multiple sub-spaces. Since partitions 7 have a heat insulation function, they can isolate the transfer of heat between sub-spaces, prevent the heat in the photovoltaic power semiconductor module from affecting each other, thereby improving the heat dissipation performance of the junction box, thereby increasing the current of the photovoltaic power semiconductor module and improving the stability of the junction box.

[0029] In this embodiment, a positioning post 11 is provided on the base plate 1, and a through hole 69 is provided on the photovoltaic power semiconductor module to cooperate with the positioning post 11. The photovoltaic power semiconductor module is installed on the base plate 1 through the cooperation of the through hole 69 and the positioning post 11.

[0030] Specifically, when installing the photovoltaic power semiconductor module, the through hole 69 on the photovoltaic power semiconductor module can be aligned with the positioning post 11 on the base plate 1, and then the photovoltaic power semiconductor module can be pressed down until the through hole 69 and the positioning post 11 are fully engaged, thereby completing the installation of the photovoltaic power semiconductor module. This installation method is simple and quick and can improve the assembly efficiency of the junction box.

[0031] In this embodiment, a support frame 12 is provided on the base plate 1, and the photovoltaic power semiconductor module is disposed on the support frame 12.

[0032] Specifically, the support frame 12 can support the photovoltaic power semiconductor module, preventing the photovoltaic power semiconductor module from directly contacting the base plate 1, thereby improving the heat dissipation effect of the photovoltaic power semiconductor module.

[0033] In some embodiments, the positioning post 11 is disposed on the support frame 12. Since the positioning post 11 is disposed on the support frame 12, the support frame 12 can also limit the photovoltaic power semiconductor module, prevent the photovoltaic power semiconductor module from shaking during installation or use, and improve the stability of the photovoltaic power semiconductor module.

[0034] In this embodiment, the diode is arranged along the length of the photovoltaic power semiconductor module and connected to a conductor.

[0035] Specifically, arranging the diodes along the length of the photovoltaic power semiconductor module reduces the height occupied by the diodes, thereby reducing the overall size of the junction box and making it more compact, facilitating installation and layout on the photovoltaic modules. Simultaneously, the connection between the diodes and the conductors is more stable when placed along the length of the photovoltaic power semiconductor module, which helps improve the reliability and durability of the junction box.

[0036] In this embodiment, as Figure 2 and Figure 5 As shown, the base plate 1 and the outer frame 2 are detachably connected. The base plate 1 is provided with a first locking device 13, and the outer frame 2 is provided with a second locking device 21 that cooperates with the first locking device 13. When the first locking device 13 and the second locking device 21 cooperate with each other, the base plate 1 and the outer frame 2 are locked.

[0037] Specifically, the base plate 1 and the outer frame 2 are detachably connected through the cooperation of the first locking device 13 and the second locking device 21. This connection method not only facilitates the assembly and disassembly of the box, but also makes it convenient to inspect or replace the photovoltaic power semiconductor module inside the box. When it is necessary to open the box, simply unlock the first locking device 13 and the second locking device 21 to remove the outer frame 2 from the base plate 1, thereby easily accessing the photovoltaic power semiconductor module inside the housing space 4. When it is necessary to close the box, simply align the outer frame 2 with the base plate 1, and then lock the outer frame 2 onto the base plate 1 through the cooperation of the first locking device 13 and the second locking device 21 to complete the assembly of the box. This connection method greatly improves the practicality and convenience of the junction box.

[0038] In this embodiment, the inner wall of the outer frame 2 is provided with a protrusion 22, which abuts against the side of the photovoltaic power semiconductor module.

[0039] Specifically, the protrusion 22 further improves the stability of the photovoltaic power semiconductor module. When the outer frame 2 is locked to the base plate 1, the protrusion 22 will make close contact with the side of the photovoltaic power semiconductor module, thereby preventing the photovoltaic power semiconductor module from shaking or shifting within the housing space 4 and ensuring the normal operation of the photovoltaic power semiconductor module.

[0040] In this embodiment, the partition 7 is connected to the inner wall of the outer frame 2, and the partition 7 divides the accommodating space 4 into multiple sub-spaces.

[0041] Specifically, the partition 7 and the inner wall of the outer frame 2 can be connected by plug-in connection, welding connection or integral molding connection, etc.

[0042] For example, multiple diodes 5 are connected to multiple conductors 6 to form multiple first heating regions 41, and the multiple first heating regions 41 are located in different subspaces.

[0043] For example, the connection area between the conductor 6 and the external busbar is the second heating area 42, and multiple second heating areas 42 are located in different subspaces.

[0044] For example, multiple diodes 5 are connected to conductors 6 to form multiple first heating areas 41, and the connection area between the conductors 6 and the external busbar is a second heating area 42. The multiple first heating areas 41 and the second heating areas 42 are located in different subspaces.

[0045] Specifically, since the heat-generating areas in the photovoltaic power semiconductor module are mostly at the connection points between diode 5 and conductor 6, and between conductor 6 and the external busbar, they generate a large amount of heat during operation. If these heat-generating areas are close to each other, heat will be transferred between them, affecting the performance of the photovoltaic power semiconductor module. The partition 7 separates these heat-generating areas into different sub-spaces, thus preventing heat transfer between them and ensuring the normal operation of the photovoltaic power semiconductor module. At the same time, since the heat within each sub-space is relatively independent, it also helps improve the heat dissipation performance of the junction box, further extending its service life.

[0046] In this embodiment, a busbar perforation is formed between adjacent conductors 6, or a busbar perforation is formed on the conductor 6, or a busbar perforation is formed in the gap between the conductor 6 or the box.

[0047] Specifically, when installing the photovoltaic power semiconductor module junction box, an external busbar can be introduced into the receiving space 4 through the busbar perforation and connected to the conductor 6. This design not only simplifies the busbar installation steps but also improves the stability and reliability of the connection between the busbar and the conductor 6. Furthermore, the busbar perforation can be adjusted as needed to accommodate busbars of different specifications and sizes, thereby improving the applicability and flexibility of the photovoltaic power semiconductor module junction box.

[0048] The following is a specific embodiment of this application, such as Figures 2 to 4 As shown, in this embodiment, there are two diodes 5, namely the first diode 51 and the second diode 52, and three conductors 6, namely the first conductor 61, the second conductor 62 and the third conductor 63.

[0049] Specifically, the connection area between diode 5 and conductor 6 includes a first connection area 411 and a second connection area 412. The PN junction of the first diode 51 is electrically connected to the first conductor 61 and the second conductor 62, respectively, and the connection point is the first connection area 411. The PN junction of the second diode 52 is electrically connected to the second conductor 62 and the third conductor 63, respectively, and this connection point is the second connection area 412. The connection area between the busbar and conductor 6 includes a third connection area 421, a fourth connection area 422, and a fifth connection area 423. The third connection area 421, the fourth connection area 422, and the fifth connection area 423 are located between the first connection area 411 and the second connection area 412. In other embodiments, they may also be located on both sides.

[0050] Specifically, a first busbar through-hole 81 is formed between the first conductor 61 and the second conductor 62, and the first busbar passes through the first busbar through-hole 81 and is electrically connected to the first conductor 61 at the third connection area 421. A second busbar through-hole 82 is formed between the second conductor 62 and the third conductor 63, and the second busbar passes through the second busbar through-hole 82 and is electrically connected to the third conductor 63 at the fourth connection area 422. A third busbar through-hole 83 is provided on the second conductor 62, and the third busbar passes through the third busbar through-hole 83 and is electrically connected to the second conductor 62 at the fifth connection area 423.

[0051] It also includes a first partition 71 and a second partition 72. The first partition 71 is located between the first diode 51 and the connection area of ​​the busbar and conductor 6, and the second partition 72 is located between the connection area of ​​the busbar and conductor 6 and the second diode 52.

[0052] In the above embodiment, by setting the first partition 71 and the second partition 72, the accommodating space 4 can be divided into three subspaces. The first connection area 411 is located in the first subspace, the connection area between the busbar and the conductor 6 is located in the second subspace, and the second connection area 412 is located in the third subspace. This avoids heat transfer between the first connection area 411, the second connection area 412, and the connection area between the busbar and the conductor 6, and further improves the heat dissipation performance of the junction box.

[0053] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A photovoltaic power semiconductor module junction box, characterized in that: The device includes a box body and a box cover (3), forming a receiving space (4) between the box body and the box cover (3), and also includes a photovoltaic power semiconductor module located in the receiving space (4). The box body includes a base plate (1) and an outer frame (2). The photovoltaic power semiconductor module includes N sets of diodes and a conductor (6) electrically connected to the PN pole of the N sets of diodes (5), where N ≥ 2. The receiving space (4) is also provided with M sets of partitions (7) for isolating heat transfer between the photovoltaic power semiconductor modules, where M ≥ 1.

2. The photovoltaic power semiconductor module junction box as described in claim 1, characterized in that: The base plate (1) is provided with a positioning post (11), and the photovoltaic power semiconductor module is provided with a through hole (69) that cooperates with the positioning post (11). The photovoltaic power semiconductor module is installed on the base plate (1) through the cooperation of the through hole (69) and the positioning post (11). And / or, a support frame (12) is provided on the base plate (1), and the photovoltaic power semiconductor module is provided on the support frame (12).

3. The photovoltaic power semiconductor module junction box as described in claim 1, characterized in that: The diode is positioned along the length of the photovoltaic power semiconductor module and connected to a conductor.

4. The photovoltaic power semiconductor module junction box as described in claim 1, characterized in that: The base plate (1) and the outer frame (2) are detachably connected. The base plate (1) is provided with a first locking device (13), and the outer frame (2) is provided with a second locking device (21) that cooperates with the first locking device (13). When the first locking device (13) and the second locking device (21) cooperate with each other, the base plate (1) and the outer frame (2) are locked.

5. The photovoltaic power semiconductor module junction box as described in claim 1, characterized in that: The inner wall of the outer frame (2) is provided with a protrusion (22), which abuts against the side of the photovoltaic power semiconductor module.

6. The photovoltaic power semiconductor module junction box as described in claim 1, characterized in that: The partition (7) is connected to the inner wall of the outer frame (2), and the partition (7) divides the accommodating space (4) into multiple sub-spaces.

7. The photovoltaic power semiconductor module junction box as described in claim 6, characterized in that: Multiple diodes (5) are connected to multiple conductors (6) to form multiple first heating areas (41), and the multiple first heating areas (41) are located in different subspaces.

8. The photovoltaic power semiconductor module junction box as described in claim 6, characterized in that: The connection area between the conductor (6) and the external busbar is the second heating area (42), and multiple second heating areas (42) are located in different subspaces.

9. The photovoltaic power semiconductor module junction box as described in claim 6, characterized in that: Multiple diodes (5) are connected to a conductor (6) to form multiple first heating areas (41), and the connection area between the conductor (6) and the external busbar is a second heating area (42). The multiple first heating areas (41) and the second heating area (42) are located in different subspaces.

10. The photovoltaic power semiconductor module junction box as described in claim 1, characterized in that: A busbar perforation is formed between adjacent conductors (6), or a busbar perforation is formed on the conductor (6), or a busbar perforation is formed in the gap between the conductor (6) or the box.

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