Large-current photovoltaic bypass protection module and junction box

Abstract

The utility model discloses a heavy current photovoltaic bypass protection module and junction box, comprising a first conductor, a second conductor and N shaft type diodes arranged in parallel, N > = 2, each shaft type diode comprises a diode body, and a first pin and a second pin which are arranged at two sides of the diode body and are fixedly connected with the diode body, the N shaft type diode bodies are located between the first electric conductor and the second electric conductor, first pins and second pins of the N shaft type diodes are electrically connected with the first electric conductor and the second electric conductor respectively to form a parallel circuit, and the N shaft type diode bodies further comprise a first bus bar through hole and a second bus bar through hole; the first bus bar penetrating holes and the second bus bars are located at the left ends and the right ends of the N shaft type diode bodies, in the structure, the current bearing capacity of the photovoltaic junction box can be improved through the arrangement of the shaft type diodes connected in parallel, and meanwhile the design of a packaging structure can be reduced by adopting the shaft type diodes.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic bypass protection modules, and in particular to a high-current photovoltaic bypass protection module and junction box. Background Technology

[0002] A photovoltaic (PV) bypass protection module typically refers to a set of bypass shaft diodes installed inside or outside a solar panel. It is a crucial component of PV modules, primarily used to improve the reliability and efficiency of the PV system. The bypass module is usually installed in a junction box, which is mounted on the PV cell string. The PV cell string is electrically connected to the PV bypass protection module in the junction box via a busbar. When a cell in the PV string experiences current mismatch due to shading, damage, or performance degradation, the bypass module 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] With technological advancements and application demands, the power generation capacity of photovoltaic (PV) cell strings is increasing, and the requirements for the high current carrying capacity of PV bypass protection modules connected to PV cell strings are becoming increasingly stringent. As for the axial bypass axial diodes commonly used in PV modules, their maximum current carrying capacity is limited and cannot be substantially improved.

[0004] Therefore, in order to meet the needs of high-power photovoltaic modules, a high-current photovoltaic bypass protection module needs to be designed; at the same time, the bypass module also needs to have good heat dissipation performance and reliability to meet the application requirements of high-power photovoltaic cell strings. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a high-current photovoltaic bypass protection module that enhances the current carrying capacity of photovoltaic junction boxes while possessing good heat dissipation performance and reliability.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: it includes a first conductor, a second conductor, and N axial diodes arranged in parallel, where N≥2. Each axial diode includes a diode body and a first pin and a second pin located on both sides of the diode body and fixedly connected to the diode body. The N axial diode bodies are located between the first conductor and the second conductor. The first pin and the second pin of the N axial diodes are electrically connected to the first conductor and the second conductor respectively to form a parallel circuit. It also includes a first busbar through-hole and a second busbar through-hole, which are located at the left and right ends of the N axial diode bodies.

[0007] Furthermore, a first gap is formed between the first pin of the N axial diodes and the first conductor, the first gap being a first busbar through-hole; and a second gap is formed between the second pin of the N axial diodes and the second conductor, the second gap being a second busbar through-hole.

[0008] Furthermore, the first conductor is provided with a first through hole penetrating the first conductor, the first through hole being a first busbar through hole; the second conductor is provided with a second through hole penetrating the second conductor, the second through hole being a second busbar through hole.

[0009] Furthermore, both the first and second conductors include a main body, on which a guide portion is provided. The guide portion is located at one end of the main body near the axial diode body, and the guide portion bends toward the lower surface of the main body and away from the axial diode body, so that the horizontal distance between the guide portion and the axial diode body gradually decreases from bottom to top.

[0010] Furthermore, both the first and second conductors include a main body, and the main body has extensions on both sides along the Y-axis. The extensions are located at one end of the main body near the body of the axial diode. The first and second pins of the axial diode are located below the extensions, and the first and second pins are welded to the main body or the extensions to form an electrical connection.

[0011] Furthermore, it also includes a partition portion located outside the extension portion. The extension portion and the partition portion are integrally formed and bent downwards, and the first and second pins of the axial diode are located inside the partition portion.

[0012] Furthermore, the first conductor and the second conductor are respectively provided with a first welding area and a second welding area, and solder blocks for welding with the busbar are provided at the first welding area and the second welding area.

[0013] Furthermore, a first solder drain hole penetrating the first conductor is provided on the side of the first soldering area away from the second soldering area, and a second solder drain hole penetrating the second conductor is provided on the side of the second soldering area away from the first soldering area.

[0014] The present invention also discloses a junction box including the high-current photovoltaic bypass protection module described above, including a box body and a box cover, wherein an accommodating space is formed between the box body and the box cover, and the photovoltaic bypass protection module is located in the accommodating space.

[0015] Furthermore, the bottom wall of the box is provided with a first guide structure and a second guide structure. The first guide structure is located below the first busbar perforation, and the second guide structure is located below the second busbar perforation. Both the first guide structure and the second guide structure include a first inclined block and a second inclined block. The first inclined block and the second inclined block extend upward along the outer surface of the bottom wall of the box and inclined towards the position of the first busbar perforation or the second busbar perforation, respectively.

[0016] The beneficial effects of this utility model are:

[0017] 1. The use of parallel axial diodes in this structure can increase the current carrying capacity of the photovoltaic junction box, and the use of axial diodes can reduce the design of the packaging structure.

[0018] 2. This structure utilizes the "free" space between two parallel diodes to install the metal busbar from the solar panel, which eliminates the need for the process of creating a perforation for the busbar and also speeds up the flow of the potting compound, allowing the potting compound to quickly and effectively wrap the bypass protection module.

[0019] 3. The guide section in this structure facilitates the insertion of the busbar and also increases the heat dissipation and heat conduction effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the high-current photovoltaic bypass protection module according to an embodiment of this application.

[0021] Figure 2 This is a schematic diagram of the bottom structure of the high-current photovoltaic bypass protection module according to an embodiment of this application.

[0022] Figure 3 This is a schematic diagram of one embodiment of the high-current photovoltaic bypass protection module of this application.

[0023] Figure 4 This is a schematic diagram of another embodiment of the high-current photovoltaic bypass protection module of this application.

[0024] Figure 5 This is a schematic diagram of the junction box according to an embodiment of this application.

[0025] Figure 6 This is a schematic diagram of the bottom structure of the junction box according to an embodiment of this application.

[0026] The components in the figure are labeled as follows: first conductor 1, main body 11, first soldering area 111, guide 12, extension 13, partition 131, first solder hole 141, second conductor 2, second soldering area 211, second solder hole 241, axial diode 3, axial diode body 31, first pin 321, second pin 322, first gap 411, second gap 412, first through hole 421, second through hole 422, housing 100, housing cover 200, accommodating space 300, first guide structure 101, and second guide structure 102. Detailed Implementation

[0027] 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.

[0028] like Figure 1 As shown, an embodiment of this application discloses a high-current photovoltaic bypass protection module, including a first conductor 1, a second conductor 2, and N axial diodes 3 arranged in parallel, where N≥2. Each axial diode includes a diode body 31 and a first pin 321 and a second pin 322 located on both sides of the diode body 31 and fixedly connected to it. The N axial diode bodies 31 are located between the first conductor 1 and the second conductor 2. The first pin 321 and the second pin 322 of the N axial diodes are electrically connected to the first conductor 1 and the second conductor 2 respectively to form a parallel circuit. The module also includes a first busbar through-hole and a second busbar through-hole, which are located at the left and right ends of the N axial diode bodies 31.

[0029] Specifically, when the photovoltaic bypass protection module is installed on the battery, the first busbar and the second busbar on the battery can pass through the first busbar through-hole and the second busbar through-hole respectively and be electrically connected to the first conductor 1 and the second conductor 2 respectively.

[0030] The parallel connection of axial diodes 3 in this structure increases the current carrying capacity of the photovoltaic junction box, and the use of axial diodes 3 reduces the design of the packaging structure.

[0031] In this embodiment, a first gap 411 is formed between the first pin 321 of the N axial diodes and the first conductor 1, and the first gap 411 is a first busbar through-hole. A second gap 412 is formed between the second pin 322 of the N axial diodes and the second conductor 2, and the second gap 412 is a second busbar through-hole.

[0032] This structure utilizes the "free" space between two parallel diodes to install the metal busbar from the solar panel, which eliminates the need for the process of creating a perforation in the busbar and also speeds up the flow of the potting compound, allowing the potting compound to quickly and effectively wrap the bypass protection module.

[0033] In this embodiment, the first conductor 1 is provided with a first through hole 421 penetrating the first conductor 1, and the first through hole 421 is a first busbar through hole. The second conductor 2 is provided with a second through hole 422 penetrating the second conductor 2, and the second through hole 422 is a second busbar through hole.

[0034] Specifically, when the photovoltaic bypass protection module is installed on the battery, the first busbar and the second busbar on the battery can pass through the first through hole and the second through hole 422 respectively and be electrically connected to the first conductor 1 and the second conductor 2.

[0035] In this structure, the first through hole 421 and the second through hole 422 can be used to position the first busbar and the second busbar, preventing them from moving laterally.

[0036] In this embodiment, both the first conductor 1 and the second conductor 2 include a main body 11. A guide portion 12 is provided on the main body 11. The guide portion 12 is located at one end of the main body 11 near the axial diode body 31. The guide portion 12 is bent toward the lower surface of the main body 11 and away from the axial diode body 31, so that the horizontal distance between the guide portion 12 and the axial diode body 31 gradually decreases from bottom to top.

[0037] Specifically, the bent guide portion 12 in the above structure can guide the first busbar and the second busbar, allowing the first busbar and the second busbar to pass quickly through the guide portion 12 of the first conductor 1 and the second conductor 2. At the same time, the design of the guide portion 12 can also increase the heat dissipation area of ​​the first conductor 1 and the second conductor 2.

[0038] In this embodiment, both the first conductor 1 and the second conductor 2 include a main body 11. Both sides of the main body 11 are provided with extensions 13 along the Y-axis. The extensions 13 are located at one end of the main body 11 near the axial diode body 31. The first pin 321 and the second pin 322 of the axial diode 3 are located below the extensions 13. The first pin 321 and the second pin 322 are welded to the main body 11 or the extensions 13 to form an electrical connection.

[0039] Specifically, the extension 13 in the above structure can increase the heat dissipation area of ​​the first conductor 1 and the second conductor 2. At the same time, when the first pin 321 and the second pin 322 of the axial diode 3 are located below the extension 13, the first pin 321 and the second pin 322 of the axial diode 3 can be soldered to the extension 13, thereby facilitating the fixing of the first pin 321 and the second pin 322 of the axial diode 3 to prevent displacement of the axial diode 3.

[0040] In this embodiment, a partition 131 is also included. The partition 131 is located outside the extension 13. The extension 13 and the partition 131 are integrally formed and bent downward. The first pin 321 and the second pin 322 of the axial diode 3 are located inside the partition 131.

[0041] In this structure, the partition 131 can be integrally formed with the extension 13, and the first pin 321 and the second pin 322 of the axial diode 3 are located inside the partition 131. That is, the partition 131 can guide the first pin 321 and the second pin 322 of the axial diode 3, which facilitates the subsequent welding and fixing of the first pin 321 and the second pin 322 of the axial diode 3.

[0042] In this embodiment, a first welding area 111 and a second welding area 211 are respectively provided on the first conductor 1 and the second conductor 2, and tin blocks for welding with the busbar are provided at the first welding area 111 and the second welding area 211.

[0043] Specifically, the placement of the solder block facilitates the soldering of the first busbar and the second busbar into the first soldering area 111 and the second soldering area 211, thus eliminating the need to prepare additional solder bars during soldering.

[0044] In this embodiment, a first solder hole 141 penetrating the first conductor 1 is provided on the side of the first soldering area 111 away from the second soldering area 211, and a second solder hole 241 penetrating the second conductor 2 is provided on the side of the second soldering area 211 away from the first soldering area 111.

[0045] The first solder drain hole 141 and the second solder drain hole 241 facilitate the flow of excess solder during soldering. Simultaneously, they aid in the flow of sealant within the junction box 100 during potting, ensuring complete coverage of the first conductor 1 and the second conductor 2, thus providing a good seal. Furthermore, when resistance welding cables to the lower surfaces of the first conductor 1 and the second conductor 2, a significant amount of heat is generated. The first solder drain hole 141 and the second solder drain hole 241 act as a barrier to this heat transfer, preventing the heat from directly affecting the solder blocks in the first and second welding areas 111 and 211, and thus preventing the first and second busbars from detaching.

[0046] The present invention also discloses a junction box, including the high-current photovoltaic bypass protection module described above, including a box body 100 and a box cover 200, wherein a receiving space 300 is formed between the box body 100 and the box cover 200, and the photovoltaic bypass protection module is located in the receiving space 300.

[0047] Specifically, a first guide structure 101 and a second guide structure 102 are provided on the bottom wall of the box body 100. The first guide structure 101 is located below the first busbar perforation, and the second guide structure 102 is located below the second busbar perforation. Both the first guide structure 101 and the second guide structure 102 include a first inclined block and a second inclined block. The first inclined block and the second inclined block extend upward along the outer surface of the bottom wall of the box body 100 and inclined towards the position of the first busbar perforation or the second busbar perforation, respectively.

[0048] In this structure, the first and second inclined blocks allow the first and second busbars to pass easily through the first guide structure 101 and the second guide structure 102 without requiring additional alignment during installation, thus making the junction box more convenient to install.

[0049] 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 high-current photovoltaic bypass protection module, characterized in that: The device includes a first conductor (1), a second conductor (2), and N axial diodes (3) arranged in parallel, where N ≥ 2. Each axial diode includes a diode body (31) and a first pin (321) and a second pin (322) fixedly connected to the diode body (31) on both sides of the diode body (31). The N axial diode bodies (31) are located between the first conductor (1) and the second conductor (2). The first pin (321) and the second pin (322) of the N axial diodes are electrically connected to the first conductor (1) and the second conductor (2) respectively to form a parallel circuit. The device also includes a first busbar through-hole and a second busbar through-hole, which are located at the left and right ends of the N axial diode bodies (31).

2. The high-current photovoltaic bypass protection module as described in claim 1, characterized in that: A first gap (411) is formed between the first pin (321) of the N axial diodes and the first conductor (1), and the first gap (411) is a first busbar through-hole. A second gap (412) is formed between the second pin (322) of the N axial diodes and the second conductor (2), and the second gap (412) is a second busbar through-hole.

3. The high-current photovoltaic bypass protection module as described in claim 1, characterized in that: The first conductor (1) is provided with a first through hole (421) penetrating the first conductor (1), and the first through hole (421) is a first busbar through hole. The second conductor (2) is provided with a second through hole (422) penetrating the second conductor (2), and the second through hole (422) is a second busbar through hole.

4. The high-current photovoltaic bypass protection module as described in claim 2, characterized in that: The first conductor (1) and the second conductor (2) both include a main body (11). A guide (12) is provided on the main body (11). The guide (12) is located at one end of the main body (11) near the axial diode body (31). The guide (12) bends toward the lower surface of the main body (11) and away from the axial diode body (31), so that the horizontal distance between the guide (12) and the axial diode body (31) gradually decreases from bottom to top.

5. The high-current photovoltaic bypass protection module as described in claim 1, characterized in that: The first conductor (1) and the second conductor (2) both include a main body (11). The main body (11) has extensions (13) on both sides along the Y-axis. The extensions (13) are located at one end of the main body (11) near the body of the axial diode (31). The first pin (321) and the second pin (322) of the axial diode (3) are located below the extensions (13). The first pin (321) and the second pin (322) are welded to the main body (11) or the extensions (13) to form an electrical connection.

6. The high-current photovoltaic bypass protection module as described in claim 5, characterized in that: It also includes a partition (131) located outside the extension (13), the extension (13) and the partition (131) being integrally formed and bent downwards, and the first pin (321) and the second pin (322) of the axial diode (3) being located inside the partition (131).

7. The high-current photovoltaic bypass protection module as described in claim 1, characterized in that: The first conductor (1) and the second conductor (2) are respectively provided with a first welding area (111) and a second welding area (211), and tin blocks for welding with the busbar are provided at the first welding area (111) and the second welding area (211).

8. The high-current photovoltaic bypass protection module as described in claim 7, characterized in that: The first soldering area (111) is provided with a first solder hole (141) that penetrates the first conductor (1) on the side away from the second soldering area (211), and the second soldering area (211) is provided with a second solder hole (241) that penetrates the second conductor (2) on the side away from the first soldering area (111).

9. A junction box comprising the high-current photovoltaic bypass protection module as described in any one of claims 1 to 8, characterized in that: It includes a box body (100) and a box cover (200), and a receiving space (300) is formed between the box body (100) and the box cover (200), and the photovoltaic bypass protection module is located in the receiving space (300).

10. A junction box as described in claim 9, characterized in that: The bottom wall of the box (100) is provided with a first guide structure (101) and a second guide structure (102). The first guide structure (101) is located below the first busbar perforation, and the second guide structure (102) is located below the second busbar perforation. Both the first guide structure (101) and the second guide structure (102) include a first inclined block and a second inclined block. The first inclined block and the second inclined block extend upward along the outer surface of the bottom wall of the box (100) and towards the position of the first busbar perforation or the second busbar perforation.

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