Junction box assembly

Abstract

This invention belongs to the field of photovoltaic device technology and discloses a junction box assembly, including a box frame, a box base, a diode assembly, and a box cover. A receiving cavity is provided through the box frame along a first direction. The box base is detachably connected to the box frame, and the box cover is open at one end of the receiving cavity. The diode assembly is located in the receiving cavity and disposed on the box base. The box cover is detachably connected to the box frame, and the box cover is open at the other end of the receiving cavity. In this invention, the box frame and the box base are detachably connected, so that when a matching diode assembly is replaced according to different current loads, only the matching box base needs to be adjusted, while the box frame and the box cover remain unchanged. This improves the versatility of the junction box assembly, shortens the development or manufacturing cycle, and reduces equipment costs.

Description

Technical Field

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

[0002] The photovoltaic junction box assembly is one of the key components in a photovoltaic system. In the entire photovoltaic system, the junction box assembly is used to connect the photovoltaic modules and the inverter, connecting the electrical energy generated by the photovoltaic modules with the external load.

[0003] The junction box assembly includes a box body, a diode housed inside the box body, and a cover enclosing the box body. In existing photovoltaic systems, it is necessary to replace the matching diodes according to different current loads, and to replace the matching box body for different diodes, which results in poor versatility of the junction box assembly and high manufacturing costs. Summary of the Invention

[0004] The purpose of this invention is to provide a junction box assembly that is highly versatile and has low manufacturing cost.

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

[0006] Junction box assembly, including:

[0007] The middle frame of the box body has a receiving cavity that extends through it along a first direction;

[0008] The box base is detachably connected to the middle frame of the box and covers one end opening of the accommodating cavity. The box base is provided with a converging channel extending along the first direction.

[0009] A diode assembly is located in the accommodating cavity and is disposed on the housing base;

[0010] The lid is detachably connected to the middle frame of the box body, sealing the other end opening of the accommodating cavity.

[0011] Preferably, the confluence channel includes a confluence port and an intermediate passage, the intermediate passage connecting the confluence port and the accommodating cavity. Along the direction away from the intermediate passage, the size of the confluence port gradually increases in a second direction, and along the direction away from the confluence port, the size of the intermediate passage is equal in the second direction, the second direction being perpendicular to the first direction.

[0012] Preferably, the box base includes:

[0013] Base support plate;

[0014] The first busbar is disposed on the bottom support plate and bent toward the interior of the accommodating cavity;

[0015] The second manifold is disposed on the bottom support plate and bent toward the interior of the accommodating cavity, forming the manifold channel between the first manifold and the second manifold.

[0016] Preferably, the first busbar protrudes higher within the accommodating cavity than the second busbar protrudes higher within the accommodating cavity, and the first busbar abuts against the diode assembly.

[0017] Preferably, multiple confluence channels are provided, and the multiple confluence channels are divided into two groups. A connecting hole is provided on the bottom support plate, and the connecting hole is located between the two groups of confluence channels and is connected to the confluence channels.

[0018] Preferably, the housing base further includes multiple support platforms, which are evenly distributed around the busbar channel, and the diode assembly is mounted on the multiple support platforms.

[0019] Preferably, the middle frame of the box is provided with a first snap-fit ​​structure, and the base of the box is provided with a second snap-fit ​​structure, and the first snap-fit ​​structure and the second snap-fit ​​structure are snapped together.

[0020] Preferably, the middle frame of the box is provided with a third snap-fit ​​structure, and the lid of the box is provided with a fourth snap-fit ​​structure, and the third snap-fit ​​structure and the fourth snap-fit ​​structure are snapped together.

[0021] Preferably, a fourth snap-fit ​​structure is provided at each end of the lid, and the two fourth snap-fit ​​structures have different widths.

[0022] Preferably, the device also includes a snap fastener, and a connecting groove is provided through the middle frame of the box along a second direction, the second direction being perpendicular to the first direction. The connecting groove is connected to the receiving cavity, and the snap fastener is snapped into the connecting groove.

[0023] The beneficial effects of this invention are:

[0024] The junction box frame and the junction box base are detachably connected, so that when the matching diode assembly is replaced according to different current loads, only the matching junction box base needs to be adjusted, while the junction box frame and the box cover remain unchanged. This improves the versatility of the junction box assembly, shortens the development or manufacturing cycle, and reduces the cost of the equipment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the junction box assembly described in an embodiment of the present invention;

[0026] Figure 2 This is an exploded view of a portion of the junction box assembly structure described in an embodiment of the present invention;

[0027] Figure 3 This is an exploded view of the box frame, box base, and snap fastener described in an embodiment of the present invention;

[0028] Figure 4 This is an exploded view of the box frame and box lid described in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the box base according to an embodiment of the present invention;

[0030] Figure 6 This is a cross-sectional view of the box base described in an embodiment of the present invention.

[0031] In the picture:

[0032] 1. Box frame;

[0033] 100. Receptacle cavity;

[0034] 300, connecting slot;

[0035] 11. First snap-fit ​​structure;

[0036] 12. Third snap-fit ​​structure;

[0037] 13. Support groove;

[0038] 14. Reinforcing ribs;

[0039] 2. Box base;

[0040] 200. Convergence channel; 201. Convergence port; 202. Intermediate passage;

[0041] 21. Base support plate; 211. Connecting hole;

[0042] 22. First busbar;

[0043] 23. Second busbar;

[0044] 24. Supporting platform; 241. Base; 242. Column;

[0045] 25. Second snap-fit ​​structure;

[0046] 26. Support block;

[0047] 3. Diode assembly;

[0048] 4. Box lid;

[0049] 41. Fourth snap-fit ​​structure;

[0050] 5. Buckle;

[0051] 6. Cables;

[0052] 7. Connector terminals. Detailed Implementation

[0053] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0054] In the description of this invention, 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 invention according to the specific circumstances.

[0055] In the description of this invention, 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 being 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 being 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.

[0056] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0057] like Figures 1-6 As shown, the present invention provides a junction box assembly, including a box frame 1, a box base 2, a diode assembly 3, and a box cover 4. The box frame 1 has a cavity 100 extending along a first direction. The box base 2 is detachably connected to the box frame 1, covering one end of the cavity 100. The box base 2 has a busbar channel 200 extending along the first direction, through which an external busbar can extend into the cavity 100. The diode assembly 3 is located in the cavity 100 and is disposed on the box base 2. The box cover 4 is detachably connected to the box frame 1, covering the other end of the cavity 100.

[0058] In this invention, the inner frame 1 and the base 2 of the junction box are detachably connected, so that when the matching diode assembly 3 is replaced according to the different current loads, only the matching base 2 needs to be adjusted, while the inner frame 1 and the cover 4 remain unchanged. This improves the versatility of the junction box assembly, shortens the development or manufacturing cycle, and reduces the cost of the equipment.

[0059] Specifically, the junction box assembly includes multiple box bases 2, which can support multiple diode assemblies 3 of different specifications. The multiple box bases 2 can be selectively connected to the box frame 1 as needed, making it more convenient to use.

[0060] More specifically, the specifications of the diode assembly 3 inside the junction box assembly are marked on the cover 4 to facilitate user selection.

[0061] Specifically, the base 2 of the housing is provided with a manifold channel 200 extending in a first direction. The manifold channel 200 includes a manifold port 201 and an intermediate passage 202. The intermediate passage 202 connects the manifold port 201 and the receiving cavity 100. In a direction away from the intermediate passage 202, the size of the manifold port 201 gradually increases in a second direction. In a direction away from the manifold port 201, the size of the intermediate passage 202 is equal in the second direction. The second direction is perpendicular to the first direction. By providing the manifold port 201 and the intermediate passage 202, the manifold assembly can be quickly and effectively guided and aligned, and the manifold can be prevented from tipping over in the opposite direction.

[0062] More specifically, the base 2 of the box includes a bottom support plate 21, a first busbar 22, and a second busbar 23. The first busbar 22 is mounted on the bottom support plate 21 and bent towards the interior of the receiving cavity 100. The second busbar 23 is mounted on the bottom support plate 21 and bent towards the interior of the receiving cavity 100. A busbar channel 200 is formed between the first busbar 22 and the second busbar 23. The busbar channel 200 is formed by bending two plates, resulting in a simple structure and convenient adjustment.

[0063] In this embodiment, the bottom support plate 21 is provided with a clearance hole, and the first busbar 22 and the second busbar 23 are both disposed in the clearance hole, forming a busbar channel 200 in the clearance hole. In addition, the busbar channel 200 formed between the first busbar 22 and the second busbar 23 is arranged through the third direction. The first direction, the second direction and the third direction are perpendicular to each other. The first busbar 22 and the second busbar 23 are bent in the same direction and then parallel to each other. A busbar opening 201 is formed in the bent section and an intermediate passage 202 is formed in the parallel section.

[0064] Specifically, the first busbar 22 protrudes higher than the second busbar 23 within the accommodating cavity 100, and the first busbar 22 abuts against the diode assembly 3. The first busbar 22 and the second busbar 23 cooperate with each other, with the first busbar 22 supporting the diode assembly 3, and the second busbar 23 being spaced apart from the diode assembly 3 to avoid the connection point between the busbar and the diode assembly 3.

[0065] More specifically, a junction channel 200 is formed between a first junction plate 22 and a second junction plate 23. Multiple junction channels 200 are provided, and the multiple junction channels 200 are divided into two groups. A connecting hole 211 is provided on the bottom support plate 21. The connecting hole 211 is located between the two groups of junction channels 200 and is connected to the junction channels 200, thereby facilitating the adjustment of the position of the junction strip in the junction channel 200.

[0066] In this embodiment, each set of bus channels 200 includes two sets, which are arranged side by side along a third direction. The two bus channels 200 of one set and the two bus channels 200 of the other set are directly opposite each other in the third direction.

[0067] Specifically, the housing base 2 also includes multiple support platforms 24, which are evenly distributed around the bus channel 200, and the diode assembly 3 is mounted on the multiple support platforms 24. By setting up the support platforms 24, the assembly of the diode assembly 3 becomes safer and more reliable.

[0068] More specifically, the support platform 24 includes a base 241 and a column 242 disposed on the base 241. The diode assembly 3 is provided with a through hole, which is fitted onto the column 242, and the base 241 provides abutment support for the diode assembly 3.

[0069] In this embodiment, four support platforms 24 are provided, arranged in a rectangular pattern, surrounding the four confluence channels 200.

[0070] Specifically, the middle frame 1 of the box is provided with a first snap-fit ​​structure 11, and the base 2 of the box is provided with a second snap-fit ​​structure 25. The first snap-fit ​​structure 11 and the second snap-fit ​​structure 25 are snapped together. The middle frame 1 and the base 2 of the box are detachably connected by the snap-fit ​​of the first snap-fit ​​structure 11 and the second snap-fit ​​structure 25, which is simple and convenient to operate.

[0071] More specifically, a support groove 13 is provided on the middle frame 1 of the box body, and a support block 26 is provided on the base 2 of the box body. The support block 26 extends into the support groove 13 and abuts against the bottom of the support groove 13.

[0072] In this embodiment, the first snap-fit ​​structure 11 is a buckle, and the second snap-fit ​​structure 25 is a slot. The buckle can snap into the slot. Two second snap-fit ​​structures 25 are respectively provided at both ends of the bottom support plate 21 along the third direction on the base plate 2 of the box body. Four first snap-fit ​​structures 11 are provided on the middle frame 1 of the box body, corresponding one-to-one with the second snap-fit ​​structures 25. One support block 26 is provided at each end of the bottom support plate 21 in the third direction, and two support blocks 26 are provided at one end in the second direction. Four support slots 13 are provided on the middle frame 1 of the box body, corresponding one-to-one with the support blocks 26. When the support block 26 abuts against the bottom of the support slot 13, the second snap-fit ​​structures 25 are snapped into the first snap-fit ​​structures 11. In addition to the above configuration, in other embodiments, the first snap-fit ​​structure 11 can also be a slot, and the second snap-fit ​​structure 25 can be a buckle.

[0073] Specifically, a third snap-fit ​​structure 12 is provided on the inner frame 1 of the box, and a fourth snap-fit ​​structure 41 is provided on the lid 4. The third snap-fit ​​structure 12 and the fourth snap-fit ​​structure 41 are snapped together. The inner frame 1 of the box and the lid 4 are detachably connected by the snap-fit ​​of the third snap-fit ​​structure 12 and the fourth snap-fit ​​structure 41, which is simple and convenient to operate.

[0074] More specifically, each end of the lid 4 is provided with a fourth snap-fit ​​structure 41, and the two fourth snap-fit ​​structures 41 have different widths. The different widths of the two fourth snap-fit ​​structures 41 provide a foolproof effect during assembly, preventing the lid 4 from being installed backwards.

[0075] In this embodiment, the third snap-fit ​​structure 12 is a buckle, and the fourth snap-fit ​​structure 41 is a slot. The buckle can snap into the slot. The dimensions of the mutually snapping third snap-fit ​​structure 12 and the fourth snap-fit ​​structure 41 are compatible. The dimensions of the fourth snap-fit ​​structures 41 at both ends of the lid 4 in the second direction are different in the third direction. When the lid 4 is installed backwards, the larger buckle cannot snap into the smaller slot, thus preventing mistaken insertion. In addition, a fourth snap-fit ​​structure 41 is also provided at one end of the lid 4 in the third direction. Correspondingly, a third snap-fit ​​structure 12 is also provided on the inner frame 1 of the box body. In addition to the above configuration, in other embodiments, the third snap-fit ​​structure 12 can be a slot, and the fourth snap-fit ​​structure 41 can be a buckle.

[0076] In terms of specific dimensions, the width of the fourth snap-fit ​​structure 41 at one end of the second direction of the lid 4 differs by 1mm from that at the other end, and the width of the two third snap-fit ​​structures 12 on the corresponding box frame 1 differs by 1mm.

[0077] Specifically, the junction box assembly also includes a snap fastener 5, and a connecting groove 300 is provided through the middle frame 1 of the box body along the second direction. The second direction is perpendicular to the first direction. The connecting groove 300 is connected to the receiving cavity 100. The snap fastener 5 is snapped into the connecting groove 300 and can press and fix the cable 6 connected to the diode assembly 3.

[0078] In this embodiment, the inner frame 1 of the box body includes a joint part and a main body part that are connected to each other. The accommodating cavity 100 is disposed on the main body part, and the connecting groove 300 is disposed on the joint part. A reinforcing rib 14 is provided on the outer side of the joint part, thereby enhancing the structural strength of the joint part and enabling it to withstand greater external force.

[0079] More specifically, the junction box assembly also includes a cable 6 and a plug-in terminal 7. One end of the cable 6 is connected to a terminal in the plug-in terminal 7, and the other end passes through the connecting groove 300 and is connected to the diode assembly 3 in the receiving cavity 100.

[0080] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A junction box assembly, characterized in that, include: The middle frame of the box body (1) has a cavity (100) that extends through the middle frame of the box body (1) along the first direction. The box base (2) is detachably connected to the box frame (1) and covers one end opening of the receiving cavity (100). The box base (2) is provided with a confluence channel (200) extending along the first direction. The box base (2) includes a bottom support plate (21), a first confluence plate (22) and a second confluence plate (23). The first confluence plate (22) is disposed on the bottom support plate (21) and bent toward the inside of the receiving cavity (100). The second confluence plate (23) is disposed on the bottom support plate (21) and bent toward the inside of the receiving cavity (100). The confluence channel (200) is formed between the first confluence plate (22) and the second confluence plate (23). A diode assembly (3) is located in the accommodating cavity (100) and disposed on the housing base (2); The cover (4) is detachably connected to the inner frame (1) of the box body, and covers the other end opening of the accommodating cavity (100); when different diode components (3) are replaced, only the base (2) of the box body is adjusted, while the inner frame (1) of the box body and the cover (4) remain unchanged; multiple bases (2) of the box body are provided, and multiple bases (2) of the box body can support multiple diode components (3) of different specifications, and multiple bases (2) of the box body are selectively connected to the inner frame (1) of the box body according to the requirements; The manifold (200) includes a manifold (201) and an intermediate passage (202). The intermediate passage (202) connects the manifold (201) and the accommodating cavity (100). Along the direction away from the intermediate passage (202), the size of the manifold (201) gradually increases in a second direction. Along the direction away from the manifold (201), the size of the intermediate passage (202) is equal in the second direction. The second direction is perpendicular to the first direction. The multiple confluence channels (200) are provided, and the multiple confluence channels (200) are divided into two groups. The bottom support plate (21) is provided with a connecting hole (211). The connecting hole (211) is located between the two groups of confluence channels (200) and is connected to the confluence channels (200).

2. The junction box assembly according to claim 1, characterized in that, The first busbar (22) protrudes into the cavity (100) at a greater height than the second busbar (23) protrudes into the cavity (100), and the first busbar (22) abuts against the diode assembly (3).

3. The junction box assembly according to claim 1, characterized in that, The base (2) of the box also includes multiple support platforms (24), which are evenly distributed around the bus channel (200), and the diode assembly (3) is mounted on the multiple support platforms (24).

4. The junction box assembly according to claim 1, characterized in that, The box frame (1) is provided with a first snap-fit ​​structure (11), and the box base (2) is provided with a second snap-fit ​​structure (25). The first snap-fit ​​structure (11) and the second snap-fit ​​structure (25) are snap-fitted together.

5. The junction box assembly according to claim 1, characterized in that, The box body frame (1) is provided with a third snap-fit ​​structure (12), and the box cover (4) is provided with a fourth snap-fit ​​structure (41). The third snap-fit ​​structure (12) and the fourth snap-fit ​​structure (41) are snap-fitted together.

6. The junction box assembly according to claim 5, characterized in that, The two ends of the lid (4) are respectively provided with a fourth snap-fit ​​structure (41), and the two fourth snap-fit ​​structures (41) have different widths.

7. The junction box assembly according to any one of claims 1-6, characterized in that, It also includes a snap fastener (5), and a connecting groove (300) is provided on the middle frame (1) of the box body along the second direction. The second direction is perpendicular to the first direction. The connecting groove (300) is connected to the accommodating cavity (100), and the snap fastener (5) is snapped into the connecting groove (300).

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