Junction box terminal for photovoltaic module

Abstract

The invention discloses a junction box terminal for a photovoltaic module, which comprises a bottom plate, and the bottom plate is provided with a positioning mark, a threading hole and a mounting position. The positioning mark is used for positioning when the junction box terminal is mounted on the box body; the threading hole is used for providing a threading channel for a photovoltaic module lead; the installation position is used for fixing a photovoltaic module lead through a mechanical structure. The mounting position comprises a mounting hole structure and a screw rod structure; when the photovoltaic module is mounted through the mounting hole structure, the hole in the photovoltaic module lead is aligned with the mounting hole in the bottom plate, and then the metal screw is screwed into the mounting hole to fix the photovoltaic module lead; when the photovoltaic module lead is installed through the screw rod structure, the photovoltaic module lead is sleeved on the screw rod through the hole on the photovoltaic module lead, and then the metal nut is screwed on the screw rod to fix the photovoltaic module lead. According to the invention, the problem of pseudo soldering of the connection of the junction box terminal and the photovoltaic module lead can be effectively solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic junction boxes, and particularly relates to a terminal for a photovoltaic module junction box. Background Art

[0002] At present, during the production of crystalline silicon photovoltaic modules, when installing the junction box, the junction box terminal and the module lead are welded by a soldering method with added tin. Solder paste is applied to the junction box terminal, and the lead is bent so that the module lead and the junction box terminal are aligned vertically. The soldering head cuts a small section of solder wire, presses down on the module lead and heats it. While pressing down, the solder wire and the solder paste on the junction box terminal are heated and melted, and at the same time, the downward pressure connects the lead and the junction box terminal together. Then, the soldering head is lifted after cooling. Through an automatic welding device, the lead and the terminal are welded together. After welding, an industrial camera is used to take pictures to check the welding situation. Due to the reflection of light, the photos cannot accurately show the actual welding effect of the welding part. Therefore, during the actual welding process, there will be cases of poor welding, resulting in low power generation of the module during long-term use, and in severe cases, the junction box will heat up and burn out. In recent years, with the popularization of the soldering method with added tin for junction boxes, the number of customer complaints about burned-out or power-deficient junction boxes of modules has gradually increased. Summary of the Invention

[0003] The present invention provides a terminal for a photovoltaic module junction box to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above object, the present invention provides a terminal for a photovoltaic module junction box, including a bottom plate, on which a positioning mark, a wire passing hole, and an installation position are provided;

[0005] The positioning mark is used for positioning the junction box terminal when it is installed on the box body;

[0006] The wire passing hole is used to provide a passage for the photovoltaic module lead to pass through;

[0007] The installation position is used to fix the photovoltaic module lead through a mechanical structure.

[0008] Preferably, the junction box terminal is made of copper and coated with a tin layer on the surface.

[0009] Preferably, the thickness of the bottom plate is greater than 2 mm and does not exceed the height of the junction box diode.

[0010] Preferably, the photovoltaic module lead is a long strip of tinned copper tape and is punched through a punching technique.

[0011] Preferably, the installation position includes an installation hole structure and a screw structure;

[0012] When installing through the mounting hole structure, align the holes on the photovoltaic module lead with the mounting holes on the bottom plate, and then screw the metal screw into the mounting hole to fix the photovoltaic module lead;

[0013] When installing through the screw structure, put the photovoltaic module lead on the screw through the hole on the photovoltaic module lead, and then screw the metal nut onto the screw to fix the photovoltaic module lead.

[0014] Preferably, the screw head of the metal screw includes a flat cross screw head, and the diameter of the metal screw head is the same as the width of the photovoltaic module lead.

[0015] Preferably, the metal screw is made of copper and coated with tin on the outside.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects:

[0017] The present invention discloses a terminal for a junction box of a photovoltaic module, which is characterized in that it includes a bottom plate, on which a positioning mark, a wire passing hole and a mounting position are provided; the positioning mark is used for positioning when the terminal of the junction box is installed on the box body; the wire passing hole is used for providing a passing channel for the photovoltaic module lead; the mounting position is used for fixing the photovoltaic module lead through a mechanical structure. The mounting position includes a mounting hole structure and a screw structure; when installing through the mounting hole structure, align the holes on the photovoltaic module lead with the mounting holes on the bottom plate, and then screw the metal screw into the mounting hole to fix the photovoltaic module lead; when installing through the screw structure, put the photovoltaic module lead on the screw through the hole on the photovoltaic module lead, and then screw the metal nut onto the screw to fix the photovoltaic module lead. The present invention adopts the connection method of screwing the screw, effectively connecting the terminal of the junction box with the component lead, and can effectively solve the problem of poor soldering between the terminal of the junction box and the photovoltaic module lead. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0019] Figure 1 It is a structural diagram of the terminal of the junction box with the mounting hole structure according to the embodiment of the present invention;

[0020] Figure 2 It is an installation schematic diagram of the terminal of the junction box with the mounting hole structure according to the embodiment of the present invention;

[0021] Figure 3 It is a structural diagram of the terminal of the junction box with the screw structure according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will describe the present application in detail with reference to the drawings and in combination with the embodiments.

[0023] It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0024] When the existing junction box terminals are welded, solder paste is applied to the junction box terminals, and the component leads are bent and aligned with the terminals up and down. The soldering head cuts a small section of solder wire, presses down on the component lead and heats it, so that the solder wire and the solder paste on the junction box terminal are heated and melted, and at the same time the downward pressure connects the lead and the terminal together, and then the soldering head is lifted after cooling.

[0025] Embodiment 1

[0026] As Figure 1 and Figure 3 shown, in this embodiment, a junction box terminal for a photovoltaic module is provided, which is characterized in that it includes a bottom plate, and a positioning mark, a wire passing hole and a mounting position are arranged on the bottom plate;

[0027] The positioning mark is used for positioning when the junction box terminal is installed on the box body;

[0028] The wire passing hole is used for providing a passing channel for the leads of the photovoltaic module;

[0029] The mounting position is used for fixing the leads of the photovoltaic module through a mechanical structure.

[0030] The mounting position includes a mounting hole structure and a screw structure;

[0031] When installing through the mounting hole structure, align the holes on the leads of the photovoltaic module with the mounting holes on the bottom plate, and then screw the metal screw into the mounting hole to fix the leads of the photovoltaic module;

[0032] When installing through the screw structure, put the leads of the photovoltaic module on the screw through the holes on the leads of the photovoltaic module, and then screw the metal nut on the screw to fix the leads of the photovoltaic module.

[0033] Furthermore, the screw head of the metal screw uses a flat cross screw head, and the diameter of its screw head is consistent with the width of the component lead. The whole body of the metal screw is made of copper material. To enhance conductivity and avoid copper oxidation, the outside is coated with tin material. The junction box terminal is made of copper material throughout, and the surface is coated with a tin layer. The mounting hole has threads, which match the threads of the metal screw. The thickness of the bottom plate is generally greater than 2 mm, but does not exceed the height of the junction box diode.

[0034] Further, when connecting the junction box terminal to the component lead, such as Figure 2 , the component lead passes through the lead hole, so that the hole on the component lead overlaps with the mounting hole of the junction box terminal, and a metal screw is screwed into the mounting hole until it is tightened and locked. To meet the sealing of the junction box, the height of the metal screw after being tightened and locked should not be higher than 2 mm below the sealing line of the junction box.

[0035] Further, the mounting hole of the junction box terminal can be replaced by the outer shape of the metal screw rod. When connecting, the component lead hole is sleeved on the screw rod of the junction box terminal, and a metal nut is used to tighten and lock it, playing the same role as screwing a screw. The height, diameter, and thread of the metal nut are the same as those of the screw rod of the junction box terminal.

[0036] The junction box terminal for photovoltaic modules disclosed by the present invention achieves the following remarkable technical effects through its unique design and structure:

[0037] Improve connection reliability:

[0038] Mechanical fixation advantage: Compared with the traditional welding method, the present invention adopts a mechanical fixation method using metal screws or nuts, effectively avoiding problems such as virtual soldering and solder shedding that may occur during the welding process. The method of screwing the metal screw into the mounting hole or screwing the nut on the screw rod provides a stable mechanical connection, ensuring a firm and reliable connection between the photovoltaic module lead and the junction box terminal. Even under long-term use and various environmental conditions, a good contact state can be maintained.

[0039] Reduce maintenance costs: Due to the improved reliability of the connection method, the failures caused by poor connection are reduced, thereby reducing the maintenance cost and replacement frequency, and improving the overall service life of the photovoltaic module.

[0040] Enhance electrical performance:

[0041] Reduce contact resistance: Both the metal screw and the junction box terminal are made of copper and coated with a tin layer. This material selection not only improves the conductivity but also prevents oxidation. The thread design of the mounting hole and the screw rod ensures a tight contact between the metal screw and the terminal, thereby significantly reducing the contact resistance and improving the power generation efficiency of the photovoltaic module.

[0042] Improve power generation efficiency: The stable electrical connection reduces the power loss, ensuring the high-efficiency power generation of the photovoltaic module under various working conditions. Especially in harsh environments such as high temperature and high humidity, it can still maintain good performance.

[0043] Improve assembly efficiency:

[0044] Simplify the assembly process: The positioning marks are designed to make the connection box terminals more accurate and faster when installed on the box body, reducing the time for alignment and adjustment. The clear design of the wire threading holes and mounting holes makes it easier to thread and fix the component leads. Operators or automated equipment can quickly complete the connection operation, improving production efficiency.

[0045] Reduce the error rate: The clear positioning marks and mounting hole design reduce poor connections caused by incorrect positions, avoiding subsequent inspections and rework, and further improving production efficiency and product quality.

[0046] Enhance structural stability:

[0047] Stable connection: The design of the mounting holes and screw structure not only provides a reliable mechanical connection but also enhances the overall structural stability of the connection box terminals. The thickness design of the bottom plate ensures the strength of the terminals, enabling them to withstand a certain amount of mechanical stress and protecting the internal components from damage.

[0048] Meet the sealing requirements: The height design after the metal screws are tightened and locked takes into account the sealing requirements of the connection box, ensuring that the sealing performance of the connection box is not damaged during the connection process, thereby protecting the internal components from the external environment and extending the service life of the photovoltaic module.

[0049] Improve flexibility and compatibility:

[0050] Multiple connection methods: The present invention provides two connection methods (mounting hole structure and screw structure). Users can choose the most suitable connection method according to actual needs and on-site conditions, increasing the flexibility and compatibility of the system.

[0051] In summary, through its innovative design and structure, the connection box terminal for photovoltaic modules of the present invention significantly improves the connection reliability, electrical performance, assembly efficiency, structural stability, and flexibility, providing a strong guarantee for the efficient and stable operation of photovoltaic modules.

[0052] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A junction box terminal for a photovoltaic module, characterized in that: It includes a bottom plate, on which positioning marks, threading holes and mounting positions are arranged; The positioning mark is used to position the terminal of the junction box when it is installed on the box body; The threading hole is used to provide a passage for the lead wire of the photovoltaic module; The mounting position is used to fix the photovoltaic module lead wire through a mechanical structure.

2. The junction box terminal according to claim 1, characterized in that: The junction box terminal is made of copper and coated with a tin layer on the surface.

3. The junction box terminal according to claim 1, characterized in that: The thickness of the bottom plate is greater than 2 mm and does not exceed the height of the junction box diode.

4. The junction box terminal according to claim 1, characterized in that: The photovoltaic module lead is a long tinned copper strip and is punched by a punching technology.

5. The junction box terminal according to claim 1, characterized in that: The mounting position includes a mounting hole structure and a screw structure; When installing through the mounting hole structure, align the holes on the photovoltaic module leads with the mounting holes on the base plate, and then screw the metal screws into the mounting holes to fix the photovoltaic module leads; When installing through the screw structure, the photovoltaic module lead is put on the screw through the hole on the photovoltaic module lead, and then the metal nut is screwed on the screw to fix the photovoltaic module lead.

6. The junction box terminal according to claim 5, characterized in that: The screw head of the metal screw comprises a flat cross screw head, and the diameter of the metal screw head is consistent with the width of the photovoltaic component lead.

7. The junction box terminal according to claim 5, characterized in that: The metal screw is made of copper and coated with tin on the outside.

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