Diode detachable junction box and photovoltaic system

Abstract

The utility model discloses a diode detachable junction box and a photovoltaic system, which comprise a junction box base, a box body and a diode arranged in the box body, and the junction box base is internally provided with a first conductor and a second conductor. The diode comprises a diode body, a first pin and a second pin, the first pin and the second pin are connected with the diode body, the junction box base is detachably connected with the box body, when the junction box base and the box body are assembled, the first pin is electrically connected with the first electric conductor, the second pin is electrically connected with the second electric conductor, the junction box further comprises a cover body, and the cover body covers the box body. According to the structure, the diode is installed in the box body, the first electric conductor and the second electric conductor are installed in the junction box bottom box, and the junction box base is detachably connected with the box body, so that when the diode is damaged in the use process, the diode can be rapidly replaced by disassembling the box body.

Description

Technical Field

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

[0002] A photovoltaic (PV) bypass protection module is a crucial component of PV modules, primarily used to improve the reliability and efficiency of the PV system. When a cell in a 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 and maintains the overall power generation efficiency of the PV module. The bypass protection module consists of a diode and a conductor electrically connected to the diode.

[0003] Currently, bypass protection modules are mostly installed inside junction boxes. When using them, insulating sealant needs to be poured into the box to prevent the bypass protection module inside the junction box from being affected by dust and moisture. The diodes inside the box are prone to generating a lot of heat during normal operation, which may cause them to be damaged. Once damaged, they cannot be replaced, and the solar cell string connected in parallel with them will not play the role of bypass protection. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a detachable diode junction box that facilitates the replacement of damaged diodes.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a detachable diode junction box, including a junction box base, a first conductor and a second conductor disposed inside the junction box base, a box body and a diode disposed inside the box body, the diode including a diode body and a first pin and a second pin connected to the diode body, the junction box base and the box body being detachably connected, when the junction box base and the box body are assembled, the first pin is electrically connected to the first conductor and the second pin is electrically connected to the second conductor, and a cover is also included, the cover covering the box body.

[0006] Furthermore, the box body and the junction box base are equipped with mutually cooperating locking structures.

[0007] Furthermore, the box body includes a horizontal plate and side walls arranged around the horizontal plate. The horizontal plate and the side walls form a first cavity on the side away from the junction box base. The diode body is installed in the first cavity. The horizontal plate is provided with pin through holes for the first pin and the second pin to pass through.

[0008] Furthermore, the sidewall and the junction box base are provided with a locking structure that cooperates with each other. When the junction box base is assembled with the box body, part of the junction box base is wrapped by the sidewall, and the junction box base, the sidewall and the cross plate form a second cavity. The first conductor and the second conductor are located in the second cavity.

[0009] Furthermore, the base has an annular groove on its outer circumference, and an annular sealing ring is provided in the annular groove. When the junction box base is assembled with the box body, the side wall abuts against the annular sealing ring.

[0010] Furthermore, the pin via includes a first via and a second via, wherein the first pin passes through the first via and is electrically connected to a first conductor, and the second pin passes through the second via and is electrically connected to a second conductor.

[0011] Furthermore: the first conductor includes a first conductor body and a first connecting part fixedly connected to the first conductor body; the second conductor includes a second conductor body and a second connecting part fixedly connected to the second conductor body; the first pin is electrically connected to the first connecting part; and the second pin is electrically connected to the second connecting part.

[0012] The junction box base has a through hole, and the busbar connection end of the first conductor body and the second conductor body is located at the through hole. The busbar connection end of the first conductor body and the second conductor body has a flat structure.

[0013] Furthermore, the junction box base is provided with a first embedding groove and a second embedding groove, and the first connecting part and the second connecting part are respectively located in the first embedding groove and the second embedding groove.

[0014] Furthermore, the first connecting part and the second connecting part are pin-shaped conductors, and the first pin and the second pin are hollow sleeve-shaped conductors that cooperate with the first connecting part and the second connecting part. The first pin and the second pin are respectively inserted into the first connecting part and the second connecting part and electrically connected to the first conductor and the second conductor.

[0015] Alternatively, the first connecting part and the second connecting part may be hollow sleeve-shaped conductors, and the first pin and the second pin may be pin-shaped conductors that cooperate with the first connecting part and the second connecting part. The first pin and the second pin may be inserted into the first connecting part and the second connecting part respectively and electrically connected to the first conductor and the second conductor.

[0016] Furthermore, both the first cavity and the inner cavity of the junction box base are provided with sealant, so that the diode, the first conductor, and the second conductor are isolated within the sealant.

[0017] This utility model also discloses a photovoltaic system, including the aforementioned detachable diode junction box, and a photovoltaic module. The photovoltaic module is provided with a first busbar and a second busbar, which pass through a perforation and are electrically connected to the first conductor body and the second conductor body, respectively.

[0018] Furthermore, there are N detachable diode junction boxes arranged sequentially, and a first cable and a second cable are also included. The first cable is fixedly connected to the first pin or the first conductor in the leftmost detachable diode junction box, and the second cable is fixedly connected to the second pin or the second conductor in the rightmost detachable diode junction box.

[0019] The beneficial effects of this utility model are:

[0020] 1. In this structure, the diode is installed inside the housing, the first conductor and the second conductor are installed inside the junction box bottom, and the junction box base is detachably connected to the housing. This allows the diode to be quickly replaced by disassembling the housing when it is damaged during use.

[0021] 2. The structure can accommodate diodes through the horizontal plate and side wall, which facilitates the encapsulation of the diodes after assembly, prevents them from being affected by dust and moisture, and increases their service life.

[0022] 3. The annular sealing ring on the outer side of the base in this structure ensures the sealing performance of the connection between the junction box base and the box body. Attached Figure Description

[0023] Figure 1 This is an exploded view of the diode detachable junction box according to an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the junction box base in the diode detachable junction box according to an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the structure of the diode detachable junction box in an embodiment of this application.

[0026] Figure 4 This is a structural schematic diagram of the diode detachable junction box from another perspective, according to an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the bottom structure of the photovoltaic system according to an embodiment of this application.

[0028] The diagram is marked as follows:

[0029] Junction box base 1, first conductor 11, first conductor body 111, first connecting part 112, second conductor 12, second conductor body 121, second connecting part 122, first embedding groove 13, second embedding groove 14, through hole 15, annular groove 16, annular sealing ring 17, buckle 18;

[0030] Box 2, diode 21, diode body 211, first pin 212, second pin 213, horizontal plate 22, pin through hole 221, first through hole 2211, second through hole 2212, side wall 23, first cavity 2A, second cavity 2B, slot 28;

[0031] Cover 3;

[0032] First busbar 41, second busbar 42, first cable 43, second cable 44. Detailed Implementation

[0033] 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.

[0034] like Figure 1 , Figure 2 As shown, an embodiment of this application discloses a detachable diode junction box, including a junction box base 1, a first conductor 11 and a second conductor 12 disposed inside the junction box base 1, a box body 2 and a diode 21 disposed inside the box body 2, the diode 21 including a diode body 211 and a first pin 212 and a second pin 213 connected to the diode body 211, the junction box base 1 and the box body 2 are detachably connected, when the junction box base 1 and the box body 2 are assembled, the first pin 212 is electrically connected to the first conductor 11, and the second pin 213 is electrically connected to the second conductor 12, and the box body 2 also includes a cover 3, the cover 3 covering the box body 2.

[0035] Specifically, during assembly, the junction box base 1 is first installed on the photovoltaic module. Then, glue is poured into the base to seal the first conductor 11 and the second conductor 12 within the sealant. Next, the box body 2 is detachably connected to the junction box base 1. During the connection process, the first pin 212 is electrically connected to the first conductor 11, and the second pin 213 is electrically connected to the second conductor 12, completing the entire installation process. If the diode 21 is damaged during use, the box body 2 can be disassembled from the junction box base 1, and then the box body 2 containing the new diode 21 can be reconnected to the junction box base 1 to replace the diode 21. No soldering or other operations are required during this process.

[0036] In this structure, the diode 21 is installed inside the housing 2, the first conductor 11 and the second conductor 12 are installed inside the junction box bottom box, and the junction box base 1 is detachably connected to the housing 2. This allows the diode 21 to be quickly replaced by disassembling the housing 2 when it is damaged during use.

[0037] In this embodiment, the box body 2 and the junction box base 1 are provided with mutually cooperating locking structures.

[0038] Specifically, the locking structure can take many forms. For example, the locking structures that cooperate with each other can be installed at the bottom of the box and the top of the junction box base respectively; or the locking structures that cooperate with each other can be installed at the bottom of the box and the side of the junction box respectively, with the box 2 fitted onto the outer surface of the junction box base 1 to complete the connection; or the locking structures that cooperate with each other can be installed at the bottom of the box and the side of the junction box respectively, with the junction box base 1 fitted onto the outer surface of the box 2 to complete the connection.

[0039] In this embodiment, as Figure 3 As shown, the box body 2 includes a horizontal plate 22 and side walls 23 arranged around the horizontal plate 22. The horizontal plate 22 and the side walls 23 form a first cavity 2A on the side away from the junction box base 1. The diode body 211 is installed in the first cavity 2A. The horizontal plate 22 is provided with pin through holes 221 for the first pin 212 and the second pin 213 to pass through.

[0040] Specifically, a positioning rod for positioning the diode 21 can be provided on the horizontal plate 22, so that the diode 21 can be accurately assembled in the housing 2. At the same time, a sealant filling operation is performed in the first cavity 2A, thereby protecting the diode 21 from dust and water vapor. This allows only the first pin 212 and the second pin 213 to be exposed from the pin through hole 221 in the entire housing 2 structure. This setting protects the diode 21 on the one hand, and facilitates the use and replacement of the diode 21 on the other hand.

[0041] In this embodiment, as Figure 4 As shown, the side wall 23 and the junction box base 1 are provided with a locking structure that cooperates with each other. When the junction box base 1 is assembled with the box body 2, part of the junction box base 1 is wrapped by the side wall 23. The junction box base 1, the side wall 23 and the cross plate 22 form a second cavity 2B. The first conductor 11 and the second conductor 12 are located in the second cavity 2B.

[0042] It should be explained that the above-mentioned locking structure can be a buckle, a clamping structure, a pin structure, etc. In this embodiment, the locking structure in which the buckle 18 and the slot 28 cooperate is selected.

[0043] Specifically, when connecting the junction box base 1 and the box body 2, the box body 2 is inserted into the junction box base 1, so that the side wall 23 of the box body 2 is detachably locked to the outer wall of the junction box base 1. At the same time, since the junction box base is a box-shaped box with an open top, the junction box base 1, the side wall 23 and the cross plate 22 can form a second cavity 2B, so that the first conductor 11 and the second conductor 12 can be accommodated in the second cavity 2B. Since part of the junction box base 1 is wrapped by the side wall 23, the possibility of dust or moisture entering the second cavity 2B can be reduced.

[0044] In this embodiment, as Figure 2 As shown, an annular groove 16 is provided on the outer circumference of the base, and an annular sealing ring 17 is provided in the annular groove 16. When the junction box base 1 is assembled with the box body 2, the side wall 23 abuts against the annular sealing ring 17.

[0045] Specifically, after the junction box base 1 and the box body 2 are assembled, the side wall 23 abuts against the annular sealing ring 17, thereby ensuring the connection and sealing of the junction box base 1 and the box body 2.

[0046] In this embodiment, as Figure 3 As shown, the pin via 221 includes a first via 2211 and a second via 2212. The first pin 212 passes through the first via 2211 and is electrically connected to the first conductor 11. The second pin 213 passes through the second via 2212 and is electrically connected to the second conductor 12.

[0047] Specifically, the pin through-hole 221 is configured as a first through-hole 2211 and a second through-hole 2212, so that the two pins can pass through the two pins respectively. Thus, the two through-holes can be used to position the two pins respectively, thereby ensuring the accuracy of the position of the diode 21 in the housing 2.

[0048] In this embodiment, as Figure 1 and Figure 2 As shown, the first conductor 11 includes a first conductor body 111 and a first connecting portion 112 fixedly connected to the first conductor body 111, and the second conductor 12 includes a second conductor body 121 and a second connecting portion 122 fixedly connected to the second conductor body 121. The first pin 212 is electrically connected to the first connecting portion 112, and the second pin 213 is electrically connected to the second connecting portion 122.

[0049] The junction box base 1 has a through hole 15. The busbar connection end of the first conductor body 111 and the second conductor body 121 is located at the through hole 15. The busbar connection end of the first conductor body 111 and the second conductor body 121 has a flat structure.

[0050] Specifically, the first conductor body 111 and the second conductor body 121 are used to connect with an external busbar, the first connection part 112 is used to connect with the first pin 212, and the second connection part 122 is used to connect with the second pin 213, thereby enabling the diode 21 to connect with the busbar on the photovoltaic module. At the same time, the busbar connection ends of the first conductor body 111 and the second conductor body 121 are designed as flat structures, which facilitates the connection between the busbar and the first conductor body 111 and the second conductor body 121.

[0051] In this embodiment, the first connecting part 112 and the second connecting part 122 are pin-shaped conductors, and the first pin 212 and the second pin 213 are hollow sleeve-shaped conductors that cooperate with the first connecting part 112 and the second connecting part 122. The first pin 212 and the second pin 213 are respectively inserted into the first connecting part 112 and the second connecting part 122 and electrically connected to the first conductor 11 and the second conductor 12.

[0052] Alternatively, the first connecting part 112 and the second connecting part 122 may be hollow socket-shaped conductors, and the first pin 212 and the second pin 213 may be pin-shaped conductors that cooperate with the first connecting part 112 and the second connecting part 122. The first pin 212 and the second pin 213 may be inserted into the first connecting part 112 and the second connecting part 122 respectively and electrically connected to the first conductor 11 and the second conductor 12.

[0053] It should be explained that the above two are preferred embodiments, and the following embodiments are also possible: For example, one of the first connecting part 112 and the second connecting part 122 is a hollow sleeve-shaped conductor and the other is a pin-shaped conductor. Correspondingly, one of the first pin 212 and the second pin 213 is a mating pin-shaped conductor and the other is a hollow sleeve-shaped conductor. Other plug-in connection structures are also possible.

[0054] In this embodiment, as Figure 2 As shown, the junction box base 1 is provided with a first embedding groove 13 and a second embedding groove 14, and the first connecting part 112 and the second connecting part 122 are respectively located in the first embedding groove 13 and the second embedding groove 14.

[0055] The first connecting part 112 and the second connecting part 122 are pin-shaped conductors. The first pin 212 and the second pin 213 are hollow sleeve-shaped conductors that cooperate with the first connecting part 112 and the second connecting part 122. The first pin 212 and the second pin 213 are respectively inserted into the first connecting part 112 and the second connecting part 122 and electrically connected to the first conductor 11 and the second conductor 12.

[0056] It should be explained that the gap formed between the first embedding groove 13 and the first connecting part 112 allows the first pin 212 to be inserted, and the gap formed between the second embedding groove 14 and the second connecting part 122 allows the second pin 213 to be inserted.

[0057] Specifically, during installation, the junction box base 1 is first installed on the photovoltaic module. The first conductor 11 and the second conductor 12 are respectively connected to the busbar of the photovoltaic module. Then, glue is poured into the base. Due to the setting of the first embedding groove 13 and the second embedding groove 14, the glue will not block the periphery of the first connecting part 112 and the second connecting part 122 during the glue pouring process. This allows the hollow socket-shaped first pin 212 and second pin 213 to still be able to be inserted into the first connecting part 112 and the second connecting part 122 after the junction box base 1 is filled with glue.

[0058] In this embodiment, sealant is provided in both the first cavity 2A and the inner cavity of the junction box base 1, so that the diode 21, the first conductor 11 and the second conductor 12 are isolated in the sealant.

[0059] In this structure, the diode 21, the first conductor 11 and the second conductor 12 can be sealed and isolated by the sealant, thereby preventing dust and moisture from affecting them.

[0060] This invention also discloses a photovoltaic system, such as Figure 1 and Figure 5 As shown, the device includes the aforementioned detachable diode junction box and a photovoltaic module. The photovoltaic module is provided with a first busbar 41 and a second busbar 42. The first busbar 41 and the second busbar 42 pass through the through hole 15 and are electrically connected to the first conductor body 111 and the second conductor body 121, respectively.

[0061] In practical applications, when the diode 21 in the photovoltaic system is damaged during use, the diode 21 can be quickly replaced by removing the damaged housing 2 from the junction box base 1 and installing the new housing 2. This eliminates the need for large-scale disassembly and repair of the entire photovoltaic system, greatly improving the maintenance efficiency and reliability of the photovoltaic system.

[0062] In this embodiment, there are N detachable diode junction boxes arranged in sequence. The assembly also includes a first cable 43 and a second cable 44. The first cable 43 is fixedly connected to the first pin 212 or the first conductor 11 in the leftmost detachable diode junction box, and the second cable 44 is fixedly connected to the second pin 213 or the second conductor 12 in the rightmost detachable diode junction box.

[0063] Specifically, preferably, the first cable 43 is fixedly connected to the first conductor 11, and the second cable 44 is fixedly connected to the second conductor 12. This arrangement allows the cables to be replaced simultaneously when the diode 21 is replaced, thus making the photovoltaic system more convenient to use.

[0064] 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 diode disconnectable terminal box characterized by: The utility model provides a junction box, which comprises a junction box base (1) provided with a first conductor (11) and a second conductor (12) inside, a box body (2) and a diode (21) provided in the box body (2), the diode (21) comprises a diode body (211) and a first pin (212) and a second pin (213) connected with the diode body (211), the junction box base (1) is detachably connected with the box body (2), when the junction box base (1) is assembled with the box body (2), the first pin (212) is electrically connected with the first conductor (11), and the second pin (213) is electrically connected with the second conductor (12), and further comprises a cover body (3) covering the box body (2).

2. A diode disconnectable terminal block as defined in claim 1, characterized in that: The box body (2) and the junction box base (1) are provided with locking structures matched with each other.

3. A diode disconnectable terminal block as defined in claim 1, characterized in that: The box body (2) comprises a horizontal plate (22) and a side wall (23) provided around the horizontal plate (22), the horizontal plate (22) and the side wall (23) form a first cavity (2A) away from the junction box base (1), the diode body (211) is installed in the first cavity (2A), and the horizontal plate (22) is provided with pin through holes (221) for the first pin (212) and the second pin (213) to pass through.

4. A diode disconnectable terminal block as defined in claim 3, characterized in that: The side wall (23) and the junction box base (1) are provided with locking structures matched with each other, when the junction box base (1) is assembled with the box body (2), part of the junction box base (1) is wrapped by the side wall (23), the junction box base (1) forms a second cavity (2B) with the side wall (23) and the horizontal plate (22), and the first conductor (11) and the second conductor (12) are located in the second cavity (2B).

5. A diode disconnectable terminal block as defined in claim 3, characterized in that: The base is provided with a ring groove (16) on the outer side in the circumferential direction, and the ring groove (16) is provided with a ring-shaped sealing ring (17), when the junction box base (1) is assembled with the box body (2), the side wall (23) abuts against the ring-shaped sealing ring (17).

6. A diode disconnectable terminal block as defined in claim 3, characterized in that: The pin through hole (221) comprises a first through hole (2211) and a second through hole (2212), the first pin (212) passes through the first through hole (2211) and is electrically connected with the first conductor (11), and the second pin (213) passes through the second through hole (2212) and is electrically connected with the second conductor (12).

7. A diode disconnectable terminal block as defined in claim 1, characterized in that: The first conductor (11) comprises a first conductor body (111) and a first connecting portion (112) fixedly connected with the first conductor body (111), the second conductor (12) comprises a second conductor body (121) and a second connecting portion (122) fixedly connected with the second conductor body (121), the first pin (212) is electrically connected with the first connecting portion (112), and the second pin (213) is electrically connected with the second connecting portion (122). The junction box base (1) is provided with a through hole (15), and the connecting end of the bus bar of the first conductive body (111) and the second conductive body (121) is located at the through hole (15). The connecting end of the bus bar of the first conductive body (111) and the second conductive body (121) is in a flat structure.

8. A diode disconnectable terminal block as defined in claim 1, characterized in that: The junction box base (1) is provided with a first embedding groove (13) and a second embedding groove (14), and the first connecting part (112) and the second connecting part (122) are respectively located in the first embedding groove (13) and the second embedding groove (14).

9. The detachable junction box of a diode according to claim 1, characterized in that: The first connecting part (112) and the second connecting part (122) are pin-shaped conductors, the first pin (212) and the second pin (213) are hollow sleeve-shaped conductors matched with the first connecting part (112) and the second connecting part (122), and the first pin (212) and the second pin (213) are respectively inserted into the first connecting part (112) and the second connecting part (122) and electrically connected with the first conductive body (11) and the second conductive body (12). Or the first connecting part (112) and the second connecting part (122) are hollow sleeve-shaped conductors, the first pin (212) and the second pin (213) are pin-shaped conductors matched with the first connecting part (112) and the second connecting part (122), and the first pin (212) and the second pin (213) are respectively inserted into the first connecting part (112) and the second connecting part (122) and electrically connected with the first conductive body (11) and the second conductive body (12).

10. A diode disconnectable terminal block as defined in claim 1, characterized in that: The first cavity (2A) and the inner cavity of the junction box base (1) are both provided with sealing glue, so that the diode (21), the first conductive body (11) and the second conductive body (12) are isolated in the sealing glue.

11. Photovoltaic system comprising the diode disconnecting junction box according to any one of claims 1 to 9, characterized in that: The photovoltaic module is further provided with a first bus bar (41) and a second bus bar (42), and the first bus bar (41) and the second bus bar (42) are respectively electrically connected with the first conductive body (111) and the second conductive body (121) through the through hole (15).

12. The photovoltaic system of claim 10, wherein: The detachable junction box of a diode is N, N detachable junction boxes of a diode are sequentially arranged, and the first cable (43) and the second cable (44) are further provided. The first cable (43) is fixedly connected with the first pin (212) or the first conductive body (11) in the leftmost detachable junction box of a diode, and the second cable (44) is fixedly connected with the second pin (213) or the second conductive body (12) in the rightmost detachable junction box of a diode.

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