Split type junction box

Abstract

The utility model discloses a split type junction box, which comprises an anode junction box body and a cathode junction box body, the anode junction box body and the cathode junction box body are electrically connected through an anode connecting cable and a cathode connecting cable, and the anode junction box body and the cathode junction box body are the same in appearance and size, are L-shaped and are provided with clamping grooves; insulation sealant is injected between the photovoltaic module and the clamping groove. The anode wiring assembly and the cathode wiring box body are clamped on the two corners of the photovoltaic assembly through the clamping grooves, the split type design enables the wiring box to be closest to the anode lead-out wire or the cathode lead-out wire of the lead-out wire, the mode does not need to drill photovoltaic glass, and the processing difficulty and the risk of damage to the glass of the photovoltaic assembly are reduced. The clamping groove improves the connection stability of the junction box and the photovoltaic module; and after the photovoltaic modules are clamped, insulating sealant is injected between the photovoltaic modules and the clamping grooves, so that the risk of electric leakage on the side surfaces of the plurality of photovoltaic modules is eliminated, and the stability of connection between the junction box and the photovoltaic modules is further improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of photovoltaic modules, specifically relating to a split junction box. Background Technology

[0002] With the continuous development of photovoltaic equipment, the application of Building Integrated Photovoltaic (BIPV) is gradually increasing, and the structural forms of related photovoltaic modules have also undergone tremendous changes. In order to cope with market changes, various hollow and composite sandwich photovoltaic modules have been developed.

[0003] Photovoltaic junction boxes are an indispensable piece of equipment for photovoltaic modules. Their main function is to connect and protect solar photovoltaic modules, connect the power generated by the photovoltaic modules to external lines, and conduct the current generated by the photovoltaic modules.

[0004] Currently, the conventional methods for connecting junction boxes to photovoltaic (PV) modules are as follows: One method is to attach the junction box to the PV panel glass. This requires drilling holes in the PV panel glass to guide the leads through the holes, and then attaching the junction box to the PV panel glass. However, drilling holes and guiding the busbars through hollow and composite sandwich PV modules is difficult and carries a high risk of glass breakage. The other method is to attach the junction box to the side of the PV module. This side-connection method, however, can lead to gaps at the joints between the multiple glass panels, posing a risk of leakage. Furthermore, the narrow sides of some PV modules can cause unstable connections when the junction box is attached to the side of the PV module. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a split junction box to solve the problems of high process difficulty and high risk of glass breakage caused by drilling holes in hollow or composite laminated glass when the junction box is pasted on the glass of the photovoltaic module. On the other hand, side connection will lead to unstable connection between the junction box and the photovoltaic module with multiple glass panels and the risk of leakage of the photovoltaic module.

[0006] To solve the above-mentioned technical problems, this utility model provides a split junction box, including a positive junction box body and a negative junction box body. The positive junction box body and the negative junction box body are electrically connected by positive and negative connecting cables. The positive junction box body and the negative junction box body are the same size and are both L-shaped.

[0007] The positive terminal box includes a first positive terminal and a second positive terminal. The first positive terminal and the second positive terminal are fixedly connected. The side of the second positive terminal away from the first positive terminal is the positive connection surface. A first connection hole is provided on the positive connection surface, through which the positive and negative connection cables pass.

[0008] The positive terminal box has two sides parallel to the positive terminal connection surface. The side closer to the positive terminal connection surface is the first inner side of the positive terminal, and a clamping groove is provided on the first inner side of the positive terminal. The side of the second terminal that is connected to and perpendicular to the first inner side of the positive terminal is the second inner side of the positive terminal, and a clamping groove is also provided on the second inner side of the positive terminal.

[0009] The side of the positive electrode first terminal that is away from the positive electrode second terminal is the positive electrode lead-out surface. The clamping groove on the positive electrode first inner side extends from the intersection of the positive electrode lead-out surface and the positive electrode first inner side to the intersection of the positive electrode first inner side and the positive electrode second inner side. The clamping groove on the positive electrode second inner side extends from the intersection of the positive electrode connection surface and the positive electrode second inner side to the intersection of the positive electrode second inner side and the positive electrode first inner side.

[0010] Similar to the structure and connection relationship of the positive terminal connection assembly, the negative terminal box includes a negative first terminal part and a negative second terminal part. The negative second terminal part also has a negative connection surface and a negative second inner surface. A second connection hole is provided on the negative connection surface. The negative first terminal part also has a negative lead-out surface and a negative first inner surface. Clamping grooves are also provided on the negative first inner surface and the negative second inner surface.

[0011] The positive terminal box is used to clamp the photovoltaic module, and insulating sealant is injected between the photovoltaic module and the clamping groove.

[0012] Circuit boards are installed inside the positive terminal first connector and the negative terminal box.

[0013] Furthermore, the surface opposite the first inner side of the positive electrode is the positive electrode box cover surface, and a positive electrode junction box cover is provided on the positive electrode box cover surface; the surface opposite the first inner side of the negative electrode is the negative electrode box cover surface, and a negative electrode junction box cover is provided on the negative electrode box cover surface.

[0014] Furthermore, a positive lead hole is provided on the positive lead surface for the positive lead wire to pass through; a negative lead hole is provided on the negative lead surface for the negative lead wire to pass through.

[0015] Furthermore, a lead connector is provided at the end of the positive lead that is away from the first positive terminal, and a lead connector is also provided at one end of the negative lead.

[0016] Furthermore, solder blocks are provided on the circuit boards of the positive first terminal section and the negative first terminal section. The solder blocks in the positive first terminal section are used to fix and connect with the positive lead; the solder blocks in the negative first terminal section are used to fix and connect with the negative lead.

[0017] Furthermore, the circuit board of the first positive terminal is fixedly connected to the positive lead by rivets, and the circuit board of the first negative terminal is fixedly connected to the negative lead by rivets.

[0018] Furthermore, the circuit board of the first positive terminal is also electrically connected to the connecting wire block; the first negative terminal is also equipped with a connecting wire block, but the difference is that a diode is also provided between the circuit board and the connecting wire block in the first negative terminal. One end of the diode is electrically connected to the circuit board, and the other end of the diode is electrically connected to the connecting wire block; the positive and negative connecting cables pass through the second positive terminal and the second negative terminal and are fixedly connected to the connecting wire block.

[0019] Furthermore, the connector block is fixedly connected to the positive and negative connecting cables by rivets.

[0020] Furthermore, the circuit board in the first positive terminal is parallel to the positive terminal box cover, and the circuit board in the first negative terminal is parallel to the negative terminal box cover.

[0021] Furthermore, the circuit board is L-shaped, and includes a vertical part and a horizontal part. The longest side of the circuit board is one side of the vertical part, and the solder block is placed on the vertical part.

[0022] The beneficial effects of the gas continuous supply device provided by this utility model are as follows: Compared with the prior art, it is equipped with a positive terminal box, a negative terminal box, a clamping groove, and a circuit board. The positive and negative terminal boxes are clamped to the two corners of the photovoltaic module by the clamping groove. The split design allows the terminal box to be as close as possible to the positive or negative lead wire. This method eliminates the need for drilling holes in the photovoltaic glass, reducing processing difficulty and the risk of photovoltaic module glass breakage. The clamping groove has three surfaces in contact with the photovoltaic module, thereby improving the stability of the connection between the terminal box and the photovoltaic module. After clamping, insulating sealant is injected between the photovoltaic module and the clamping groove, thereby eliminating the risk of leakage current on the sides of multiple photovoltaic modules and further improving the stability of the connection between the terminal box and the photovoltaic module. Attached Figure Description

[0023] Figure 1 This is a top view of the assembly of a split junction box and photovoltaic modules.

[0024] Figure 2 This is a schematic diagram of the first side view of the positive terminal box.

[0025] Figure 3 This is a schematic diagram of the second side view of the positive terminal box.

[0026] Figure 4 This is a front view of the negative electrode box cover.

[0027] Figure 5 This is a cross-sectional view of the first terminal of the negative electrode;

[0028] Figure 6This is a cross-sectional view of the first terminal of the positive electrode. Detailed Implementation

[0029] To better understand the purpose, structure, and function of this utility model, the following description is in conjunction with the appendix. Figures 1 to 6 The present invention provides a more detailed description of a split junction box.

[0030] like Figures 1 to 3 As shown in the figure, a split-type junction box according to an embodiment of the present invention includes a positive terminal junction box 100 and a negative terminal junction box 200, both of which are provided with clamping grooves 400. To address the difficulties in drilling into the photovoltaic glass and the risk of glass breakage, a side-connection-like method is adopted. To overcome the instability and leakage problem associated with side connections, the split-type junction box is designed with clamping grooves, allowing the junction box to be clamped onto the photovoltaic glass, thus solving the problem of side connection instability. Simultaneously, insulating sealant is injected between the support groove 400 and the photovoltaic module, solving the leakage problem and improving the stability of the connection. Furthermore, in order to facilitate the connection of both the positive and negative terminals of the photovoltaic modules, the junction box is designed as a separate unit, dividing the positive and negative terminals into two separate parts: the positive terminal junction box 100 and the negative terminal junction box 200. The two are connected by positive and negative connection cables 300, maintaining the electrical connection between the positive and negative terminals.

[0031] Since the positive terminal box 100 and the negative terminal box 200 are mostly the same, such as having the same shape and size, the following description will mainly focus on the positive terminal box 100, and the differences between the two will be described in detail later.

[0032] In this utility model, the positive terminal box 100 includes a first positive terminal portion 110 and a second positive terminal portion 120, wherein the first positive terminal portion 110 and the second positive terminal portion 120 are fixedly connected, making the first positive terminal portion 110 L-shaped; in some embodiments, the first positive terminal portion 110 and the second positive terminal portion 120 are integrated into one piece, which reduces the difficulty of processing the terminal box.

[0033] The surface of the positive second terminal 120 away from the positive first terminal 110 is the positive connection surface 122. A first connection hole is provided on the positive connection surface 122 for passing through the positive and negative connection cables 300. A portion of the positive and negative connection cables 300 is inside the positive second terminal 120. The positive and negative connection cables 300 pass through the first connection hole and connect to the negative terminal box 200. A portion of the positive and negative connection cables 300 extends through the interior of the second terminal 120 and into the interior of the positive first terminal 110.

[0034] like Figure 6 As shown, in this utility model, a circuit board 500 is disposed inside the positive electrode first terminal 110, and a connecting wire terminal block 700 is electrically connected to the circuit board 500. The circuit board 500 is also electrically connected to the connecting wire terminal block 700. The positive and negative electrode connecting cables 300 are fixedly connected to the connecting wire terminal block 700. For the connection method, it can also be connected by rivets, which can make the connection more stable and can be disassembled in special cases. The circuit board 500 is also provided with a solder block 510, which is used to fix the positive electrode lead 113. In some embodiments, the circuit board 500 and the positive electrode lead 113 are fixedly connected by rivets. The positive electrode lead 113 extends from the inside of the positive electrode first terminal 110 to the outside of the positive electrode first terminal 110 through a positive electrode lead-out hole. The positive electrode lead-out hole is located on the positive electrode lead-out surface 112, which is a surface of the positive electrode first terminal 110 away from the positive electrode second terminal 120.

[0035] like Figure 2 and Figure 3 As shown, it can be understood that the positive terminal box 100 has two surfaces parallel to the positive terminal connection surface 122, one is the positive first inner surface 111, and the other is the positive box cover surface 114; wherein the positive first inner surface 111 is closer to the positive terminal connection surface 122, and a clamping groove 400 is provided on the positive first inner surface 111. The surface of the positive electrode second terminal 120 that is connected to and perpendicular to the positive electrode first inner surface 111 is the positive electrode second inner surface 121. A clamping groove 400 is also provided on the positive electrode second inner surface 121. This clamping groove 400 extends from the intersection of the positive electrode lead-out surface 112 and the positive electrode first inner surface 111 to the intersection of the positive electrode first inner surface 111 and the positive electrode second inner surface 121. Simultaneously, the clamping groove 400 on the positive electrode second inner surface 121 extends from the intersection of the positive electrode connection surface 122 and the positive electrode second inner surface 121 to the intersection of the positive electrode second inner surface 121 and the positive electrode first inner surface 111. This allows the positive electrode junction box 100 to clamp the photovoltaic module 900.

[0036] like Figure 2 As shown, the positive terminal box body 100 of this split-type junction box is also provided with a positive terminal box cover 115. This positive terminal box cover 115 is located on the positive terminal box cover surface 114, which is a surface parallel to the first inner surface 111 of the positive terminal. In some embodiments, the circuit board 500 is parallel to the positive terminal box cover 115. After opening the positive terminal box cover 115, the wiring on the circuit board can be operated. Closing the positive terminal box cover 115 provides a relatively sealed environment for the inside of the positive terminal box body 100, preventing contamination from external pollutants and avoiding damage to internal components and cables.

[0037] like Figures 1 to 4 As shown, in this utility model, the negative terminal box 200 and the positive terminal box 100 also have parts with the same function, position, and size. The positive terminal box 100 has a positive first terminal part 110 and a positive second terminal part 120, and the corresponding negative terminal box 200 has a negative first terminal part 210 and a negative second terminal part 220. The negative first terminal part 210 has a negative first inner side surface, a negative lead-out surface, and a negative box cover surface 214; there is a negative lead-out hole on the negative lead-out surface; and there is a negative terminal box cover 215 on the negative box cover surface 214. The negative second terminal part 220 has a negative second inner side surface and a negative connection surface, and there is a second connection wire hole on the negative connection surface. Similar to the positive first inner side surface 111 and the positive second inner side surface 121, clamping grooves 400 are also provided on the negative first inner side surface and the negative second inner side surface.

[0038] like Figure 5 As shown, it can be understood that a circuit board 500 and a connecting wire block 700 are also provided inside the negative first terminal part 210, and a solder block 510 is provided on the circuit board 500.

[0039] It should be noted that the circuit board 500 and the connecting wire block 700 in the negative first terminal part 210 are also provided with a diode 600. One end of the diode 600 is electrically connected to the circuit board 500, and the other end of the diode 600 is electrically connected to the connecting wire block 700.

[0040] In practical applications, split-type junction boxes of different sizes can be manufactured, allowing the clamping groove 400 to be adapted to photovoltaic modules 900 of varying thicknesses. When installing the split-type junction box, first select a suitable-sized junction box and a suitable-length positive and negative connection cable 300. One end of the positive and negative connection cable 300 can be passed through the first connection hole, then through the positive second connection part 120, and finally into the positive first connection part 110 to be fixedly connected to the connection wire block 700, for example, by riveting. Similarly, the other end of the positive and negative connection cable 300 is fixedly connected to the connection wire block 700 in the negative first connection part 210. Alternatively, the positive junction box body 100 and the negative junction box body 200 can be clamped onto the two corners of the photovoltaic module 900 before installing the positive and negative connection cables 300. It should be noted that the positive terminal box 100 should be close to the positive terminal lead of the photovoltaic module 900, and the negative terminal box 200 should be close to the negative terminal lead of the photovoltaic module 900. The positive terminal lead 113 and the lead connector 800 are used to connect to the positive terminal lead in the photovoltaic module 900, and the negative terminal lead 213 and the lead connector 800 are used to connect to the positive terminal lead drawn out from the photovoltaic module 900.

[0041] For the positive lead 113 and the negative lead 213, they can be installed either before the positive terminal box 100 and the negative terminal box 200 clamp the photovoltaic module 900, or after the photovoltaic module 900 is clamped. For the positive terminal box 100, when installing the positive lead 113, the end of the positive lead 113 that is not connected to the lead connector 800 is passed through the positive lead hole into the positive first terminal part 110, and fixedly connected to the solder block 510 on the circuit board 500, for example, by soldering or riveting. Preferably, the circuit board 500 is designed in an L-shape, including a vertical portion 520 and a horizontal portion 530. The longest side of the circuit board 500 is one side of the vertical portion 520. The solder block 510 is disposed on the vertical portion 520. This design increases the contact area between the positive lead 113 and the circuit board 500, because the insulating part of the positive lead 113 can also contact the circuit board 500. After the sealant is applied, the insulating part of the positive lead 113 can also be fixedly connected to the circuit board, improving the connection stability of the positive lead 113. Similarly, the negative lead 213 is connected to the solder block 510 in the negative first connection portion 210.

[0042] After the positive and negative connecting cables 300 and the positive lead 113 in the positive first terminal section 110 are connected, sealant needs to be injected into the inside of the positive first terminal section 110 to seal it, making the positive terminal box 100 more tightly fixed to the internal components and the various internal components. This design can improve the stability of the positive terminal box 100, increase the service life of the positive terminal box 100, and facilitate the release of heat inside the positive terminal box 100. After the sealant is injected, the positive terminal box cover 115 is closed. Similarly, the negative terminal box 200 is also treated with sealant.

[0043] Next, the positive terminal box 100 is connected to the photovoltaic module 900. After clamping the positive terminal box 100 onto the photovoltaic module 900, the two sides of the clamping groove 400 contact the top surface of the photovoltaic module 900 and the ground, respectively. The bottom of the clamping groove 400 can contact the side of the photovoltaic module 900. In some embodiments, the bottom of the clamping groove 400 can be kept at a certain distance from the side of the photovoltaic module 900. This design aims to allow the insulating sealant to be injected more evenly, resulting in better insulation and sealing effects. After the positive terminal box 100 is clamped, insulating sealant needs to be injected between the photovoltaic module 900 and the clamping groove 400. Preferably, insulating sealant is injected between the bottom of the clamping groove 400 and the side of the photovoltaic module 900. After the insulating sealant is injected, it can not only improve the connection stability between the positive terminal box 100 and the photovoltaic module 900, but also solve the leakage risk on the sides of multiple photovoltaic modules. Similarly, insulating sealant is injected between the negative terminal junction box 200 and the photovoltaic module 900.

[0044] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A split-type junction box, characterized in that, It includes a positive terminal box (100) and a negative terminal box (200). The positive terminal box (100) and the negative terminal box (200) are electrically connected by positive and negative connection cables (300). The positive terminal box (100) and the negative terminal box (200) are the same size and are both L-shaped. The positive terminal box (100) includes a first positive terminal (110) and a second positive terminal (120). The first positive terminal (110) and the second positive terminal (120) are fixedly connected. The surface of the second positive terminal (120) away from the first positive terminal (110) is a positive connection surface (122). A first connection hole is provided on the positive connection surface (122), and the positive and negative connection cables (300) pass through the first connection hole. The positive terminal box (100) has two surfaces parallel to the positive terminal connection surface (122). The surface closer to the positive terminal connection surface (122) is the first inner surface of the positive terminal (111), and a clamping groove (400) is provided on the first inner surface of the positive terminal (111). The surface of the second terminal part (120) that is connected to and perpendicular to the first inner surface of the positive terminal (111) is the second inner surface of the positive terminal (121), and a clamping groove (400) is also provided on the second inner surface of the positive terminal (121). The side of the positive electrode first terminal (110) away from the positive electrode second terminal (120) is the positive electrode lead-out surface (112). The clamping groove (400) on the positive electrode first inner side surface (111) extends from the intersection of the positive electrode lead-out surface (112) and the positive electrode first inner side surface (111) to the intersection of the positive electrode first inner side surface (111) and the positive electrode second inner side surface (121). The clamping groove (400) on the positive electrode second inner side surface (121) extends from the intersection of the positive electrode connection surface (122) and the positive electrode second inner side surface (121) to the intersection of the positive electrode second inner side surface (121) and the positive electrode first inner side surface (111). Similar to the structure and connection relationship of the positive terminal connection assembly, the negative terminal box (200) includes a negative first terminal part (210) and a negative second terminal part (220). The negative second terminal part (220) also has a negative terminal connection surface and a negative second inner surface. A second connection wire hole is provided on the negative terminal connection surface. The negative first terminal part (210) also has a negative terminal lead-out surface and a negative first inner surface. A clamping groove (400) is also provided on the negative first inner surface and the negative second inner surface. The positive terminal box (100) is used to hold the photovoltaic module (900), and insulating sealant is injected between the photovoltaic module (900) and the clamping groove (400); Circuit boards (500) are provided inside the positive first terminal (110) and the negative terminal box (200).

2. A split-type junction box according to claim 1, characterized in that, The surface opposite to the first inner side (111) of the positive electrode is the positive electrode box cover surface (114), and a positive electrode junction box cover (115) is provided on the positive electrode box cover surface (114); the surface opposite to the first inner side of the negative electrode is the negative electrode box cover surface (214), and a negative electrode junction box cover (215) is provided on the negative electrode box cover surface (214).

3. A split-type junction box according to claim 2, characterized in that, A positive electrode lead-out hole is provided on the positive electrode lead-out surface (112), and the positive electrode lead-out hole is used for the positive electrode lead (113) to pass through; a negative electrode lead-out hole is provided on the negative electrode lead-out surface, and the negative electrode lead-out hole is used for the negative electrode lead (213) to pass through.

4. A split-type junction box according to claim 3, characterized in that, A lead connector (800) is provided at one end of the positive lead (113) away from the positive first terminal (110), and a lead connector (800) is also provided at one end of the negative lead (213).

5. A split-type junction box according to claim 3, characterized in that, Solder blocks (510) are provided on the circuit board (500) in the positive first terminal (110) and the negative first terminal (210). The solder blocks (510) in the positive first terminal (110) are used to be fixedly connected to the positive lead (113); the solder blocks (510) in the negative first terminal (210) are used to be fixedly connected to the negative lead (213).

6. A split-type junction box according to claim 5, characterized in that, The circuit board (500) of the positive electrode first terminal (110) is fixedly connected to the positive electrode lead (113) by rivets, and the circuit board (500) of the negative electrode first terminal (210) is fixedly connected to the negative electrode lead (213) by rivets.

7. A split-type junction box according to claim 5, characterized in that, The circuit board (500) of the positive first terminal (110) is also electrically connected to the connecting wire block (700); the connecting wire block (700) is also provided inside the negative first terminal (210), except that a diode (600) is also provided between the circuit board (500) and the connecting wire block (700) in the negative first terminal (210), one end of the diode (600) is electrically connected to the circuit board (500), and the other end of the diode (600) is electrically connected to the connecting wire block (700); the positive and negative connecting cables (300) pass through the positive second terminal (120) and the negative second terminal (220) and are fixedly connected to the connecting wire block (700).

8. A split-type junction box according to claim 7, characterized in that, The connector block (700) is fixedly connected to the positive and negative connecting cables (300) by rivets.

9. A split-type junction box according to claim 7, characterized in that, The circuit board (500) in the first positive terminal (110) is parallel to the positive terminal box cover (114), and the circuit board (500) in the first negative terminal (210) is parallel to the negative terminal box cover (214).

10. A split-type junction box according to claim 7, characterized in that, The circuit board (500) is L-shaped and includes a vertical part (520) and a horizontal part (530). The longest side of the circuit board (500) is one side of the vertical part (520), and the solder block (510) is disposed on the vertical part (520).

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