Pressing head shaped like Chinese character'chuan 'and applied to laser welding of photovoltaic module wire box

Abstract

The utility model discloses a pressure head shaped like a Chinese character'chuan 'applied to laser welding of a wire box of a photovoltaic module, which comprises a pressure head body with a strip-shaped plate-shaped structure, and a mounting hole is formed in the pressure head body; a U-shaped through hole with a lateral opening is formed in one end of the pressing head body in the top-bottom direction, a connecting passage is fixedly arranged on the bottom face of the pressing head body around the U-shaped through hole, and three pressing plates distributed in a shape like a Chinese character'chuan 'are fixedly arranged at the bottom port of the connecting passage. Through pressing of the pressing plates arranged in the shape of the Chinese character'chuan ', a welding area can be effectively framed, deviation of a welding position is avoided, it is guaranteed that welding is carried out at the same reference position every time, and the welding size is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding of photovoltaic module junction boxes, and particularly relates to a "Sichuan" - shaped pressing head applied to laser welding of photovoltaic module junction boxes. Background Art

[0002] During the laser welding process of photovoltaic module junction boxes, it is crucial to ensure that the bus bar is in full and close contact with the welding bottom plate of the junction box. The larger the contact area, the better the welding effect. However, the current junction box welding and pressing methods in the market mainly use welding pressing blocks that press and weld on both the head and tail sides. When pressing through both sides of the bus bar, the middle welding area is often not tightly pressed, resulting in voids and causing laser welding failure. Content of the Utility Model

[0003] In view of this, the utility model proposes a "Sichuan" - shaped pressing head applied to laser welding of photovoltaic module junction boxes, aiming to make the middle welding area fit together in two left - right ways without gaps.

[0004] To achieve the above - mentioned purpose, the utility model adopts the following technical solutions:

[0005] A "Sichuan" - shaped pressing head applied to laser welding of photovoltaic module junction boxes includes a pressing head body in a strip - shaped plate structure, and mounting holes are provided on the pressing head body; one end of the pressing head body is provided with a U - shaped through - hole with a lateral opening along the top - bottom direction, a connecting passage is fixedly arranged on the bottom surface of the pressing head body around the U - shaped through - hole, and three pressing plates distributed in a "Sichuan" shape are fixedly arranged at the bottom port of the connecting passage.

[0006] Optionally, the length of the middle pressing plate is greater than the lengths of the two side pressing plates.

[0007] Optionally, the connecting passage is a tapered constriction structure with a quadrilateral cross - section.

[0008] Optionally, an extended opening communicating with the top - bottom of the lateral opening of the U - shaped through - hole is provided on the upper side of the connecting passage.

[0009] Optionally, the pressing head body, the connecting passage, and the pressing plates are of an integral structure.

[0010] Optionally, the mounting holes are two tapered holes arranged at intervals.

[0011] Advantages of the Utility Model

[0012] The "Sichuan" - shaped pressing head of the utility model applied to laser welding of photovoltaic module junction boxes can effectively frame the welding area through the pressing of the pressing plates arranged in a "Sichuan" shape, thereby avoiding the deviation of the welding position, ensuring that each welding is at the same reference position, and effectively guaranteeing the welding size.

[0013] This invention relates to a three-dimensional pressure head for laser welding of photovoltaic module junction boxes. The heat generated during laser welding is isolated by the three-dimensional pressure plate and dissipated through independent channels on both sides of the welding area. This allows for faster and more uniform heat dissipation, effectively reducing the accumulation of welding debris and fumes during welding, ensuring welding results, greatly improving laser welding efficiency, and reducing welding energy. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of an angle of a crisscross-shaped pressure head used for laser welding of photovoltaic module junction boxes according to an embodiment of this utility model;

[0015] Figure 2 This is a three-dimensional schematic diagram of an angle of a crisscross-shaped pressure head used for laser welding of photovoltaic module junction boxes according to an embodiment of this utility model;

[0016] Figure 3 yes Figure 1 Application diagram;

[0017] Figure label:

[0018] 10. A vertically oriented pressure head, 11. A pressure head body, 12. A mounting hole, 13. A U-shaped through hole, 14. A connecting passage, 15. A pressure plate, 16. An extension opening, 20. A busbar, 21. A welding area, and 30. A junction box. Detailed Implementation

[0019] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. Identical components are indicated by the same reference numerals.

[0020] Please see Figure 1 and Figure 2 This utility model discloses a three-dimensional pressure head 10 for laser welding of photovoltaic module wire boxes, including a pressure head body 11 with a strip-shaped plate structure. The pressure head body 11 has mounting holes 12. Specifically, the mounting holes 12 are two conical holes, which are spaced apart from one end to the middle along the length of the pressure head body 11. The pressure head body 11 is fixed to the lifting mechanism by bolts passing through the conical holes, thus ensuring the stability of the pressure head body 11 during the welding process.

[0021] On the other end of the indenter body 11, a U-shaped through hole 13 with a lateral opening is formed along its top-bottom direction. The bottom surface of the indenter body 11 is fixedly provided with a connecting aisle 14 around the U-shaped through hole 13. The connecting aisle 14 is a tapered constriction structure with a quadrilateral cross-section. At the lower port of the connecting aisle 14, three pressing plates 15 arranged in a "Sichuan" character shape are fixedly provided. Preferably, the length of the middle pressing plate 14 is greater than that of the two side pressing plates 14, so that the welding of the photovoltaic module junction box can be more accurately performed, ensuring the uniformity and reliability of welding. The connecting aisle 14 being a tapered constriction structure helps to better concentrate the laser energy and enhance the welding effect.

[0022] In an embodiment of the present utility model, an extension opening 16 that is top-bottom connected to the lateral opening of the U-shaped through hole 13 is formed on the upper side of the connecting aisle 14. This extension opening 16 can be used as an observation window, which is convenient for real-time monitoring of the welding quality, and can also timely detect problems and make adjustments.

[0023] In an embodiment of the present utility model, the indenter body 11, the connecting aisle 14, and the pressing plate 15 are of an integral structure, making the entire indenter structure more robust and durable and not easily damaged.

[0024] As Figure 3 shown, the pressing plate 15 presses the bus bar 20 and the bottom plate of the junction box 30 through a lifting mechanism. Among them, the top layer is the pressing plate 15, the middle layer is the bus bar 20, and the bottom layer is the bottom plate of the junction box 30; during the pressing process of the "Sichuan" character-shaped pressing plate 15, the bus bar is evenly pressed downward with the acting force in three areas, so as to lay the entire surface of the bus bar 20 flat on the bottom plate of the welding junction box 30 to achieve effective welding. Through the pressing of the pressing plate 15 arranged in a "Sichuan" character shape, the welding area 21 can be effectively framed, thereby avoiding the deviation of the welding position, ensuring that each welding is at the same reference position, and effectively guaranteeing the welding size.

[0025] During the laser welding process, the heat generated is blocked by the "Sichuan" character-shaped pressing plate 15 and dissipated through the independent channels on both sides of the welding area 21, which can dissipate the heat more quickly and evenly, effectively reducing the generation of welding impurities and soot accumulation during the welding process, ensuring the welding effect, greatly improving the laser welding efficiency, and reducing the welding energy.

[0026] The three pressing plates 15 distributed in a "Sichuan" character shape form three pressing areas on the bus bar 20, and two welding areas 21 are formed between the three pressing areas. During welding, the welding device successively passes through the U-shaped through hole 13, the connecting aisle 14, and the area between adjacent pressing plates 15 to weld the welding area, ensuring that each welding in the width direction of different bus bars 20 can be performed in the specified area. The heat generated by the welding is dissipated through the areas on both sides of the welding area 21 (such as Figure 3(as shown in the image) dissipates heat to prevent the weld from turning black and to avoid over-welding due to heat dissipation.

[0027] This invention utilizes a three-dimensional pressure plate 15 to act on the busbar 20, ensuring full contact between the busbar 20 and the base plate of the junction box 30, resulting in a higher degree of pressure bonding than before. A larger contact area further improves the yield rate of laser welding and the overall appearance inspection rate after welding. Furthermore, the heat dissipation areas formed on both sides of the laser welding accelerate the heat dissipation of single-area welding, preventing heat overlap between two laser welding areas and avoiding excessive laser welding energy that could lead to welding blackening, burn-through, or other problems. Simultaneously, the three-dimensional pressure plate 15 defines the welding area between the busbar and the base plate, ensuring that each laser welding operation is performed within the three-dimensional area. This design is also applicable to various types of busbars, enhancing welding compatibility.

[0028] The technical solution of this utility model has been described in detail above with reference to specific embodiments. The specific embodiments described are used to help understand the concept of this utility model. Derivations and modifications made by those skilled in the art based on the specific embodiments of this utility model also fall within the protection scope of this utility model.

Claims

1. A "Sichuan"-shaped indenter (10) applied to laser welding of photovoltaic module junction boxes, comprising an indenter body (11) in a strip-shaped plate structure, and mounting holes (12) are formed in the indenter body (11); characterized in that: One end of the indenter body (11) is provided with a U-shaped through hole (13) with a lateral opening along the top-bottom direction, a connecting passage (14) is fixedly arranged on the bottom surface of the indenter body (11) around the U-shaped through hole (13), and three pressing plates (15) distributed in a "Sichuan" shape are fixedly arranged at the bottom port of the connecting passage (14).

2. The "C"-shaped pressing head (10) used for laser welding of photovoltaic module wire boxes according to claim 1, characterized in that: The length of the middle pressing plate (15) is greater than the lengths of the two side pressing plates (15).

3. The "C"-shaped pressing head (10) used for laser welding of photovoltaic module wire boxes according to claim 1, characterized in that: The connecting passage (14) is a tapered constriction structure with a quadrilateral cross-section.

4. The "C"-shaped pressing head (10) used for laser welding of photovoltaic module wire boxes according to claim 1, characterized in that: An extension opening (16) communicating with the lateral opening of the U-shaped through hole (13) in the top-bottom direction is formed on the upper side of the connecting passage (14).

5. The "C"-shaped pressing head (10) used for laser welding of photovoltaic module wire boxes according to claim 1, characterized in that: The indenter body (11), the connecting passage (14) and the pressing plate (15) are of an integral structure.

6. The "C"-shaped pressing head (10) used for laser welding of photovoltaic module wire boxes according to claim 1, characterized in that: The mounting holes (12) are two tapered holes arranged at intervals.

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