Photovoltaic junction box hot melt head

Abstract

The utility model relates to photovoltaic junction box hot melt head relates to photovoltaic technical field. The hot melt groove gradually becomes big from the groove bottom to the inside diameter of the groove mouth, and is equipped with first arc concave part and second arc concave part, through the design of gradually changing inside diameter, make the molten material form pressure gradient in the groove in the hot melt process, enhance material fluidity, promote the wettability of the welding interface, avoid the stress concentration caused by the sudden change of inside diameter, reduce the risk of weld cracking, improve the welding strength, the inside diameter of second arc concave part is bigger than the inside diameter of first arc concave part, forms bigger fusion space, enhances the fusion strength, the utility model passes through the double arc design, optimizes the material distribution in the fusion process, improves the welding quality and reliability.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a photovoltaic junction box thermal fusion head. Background Technology

[0002] In assembly, the junction box plastic parts and diodes need to be riveted together to prevent the diodes from falling off. Currently, riveting production generally uses either cold pressing or hot melting processes. Cold pressing, due to its high speed and force, can cause instantaneous deformation of the junction box plastic parts, leading to the risk of breakage or microcracks. This can result in diode detachment during subsequent use, severely impacting the quality of the junction box. Hot melting, using heating elements and thermocouples to heat the fusion head, involves less force and slower speed. As the fusion head contacts the junction box plastic parts, the plastic melts, riveting the diode together. However, during assembly, the product can loosen, and the conductor can separate from the base. The effective area at the fusion point between the diode and the junction box is also small, leading to connection failures. Therefore, improving the stability and reliability of the connection after hot melting is a crucial technical problem that needs to be solved in this case. Utility Model Content

[0003] To address the above problems, this utility model provides a photovoltaic junction box hot-melt head with a compact structure that improves the stability and reliability of hot-melt.

[0004] The technical solution of this utility model is: A photovoltaic junction box hot-melt head includes a hot-melt body, the bottom of which is provided with a hot-melt groove; The hot melt tank has a gradually increasing inner diameter from the bottom to the opening, and is provided with a first arc-shaped concave portion and a second arc-shaped concave portion. The inner diameter of the second arc-shaped concave portion is larger than the inner diameter of the first arc-shaped concave portion; The vertical height H from the bottom to the opening of the hot melt tank is less than the inner diameter R of the opening of the hot melt tank.

[0005] Specifically, the bottom of the hot melt tank has a flat surface in the middle.

[0006] Specifically, the vertical height H = (2~3) * inner diameter R.

[0007] Specifically, the vertical height is 1.2~1.6mm.

[0008] Specifically, the opening of the hot melt groove is provided with an arc-shaped chamfer.

[0009] Specifically, the thermoplastic body is equipped with an electric heating rod and a temperature sensor.

[0010] Specifically, the hot melt body is provided with connected cooling nozzles.

[0011] Specifically, the cooling nozzle is fixedly mounted on the hot melt body by grippers; the grippers include: The fixing part is ring-shaped and includes a first half-ring and a second half-ring. One end of the first half-ring is hinged to the second half-ring, and the other end is fixedly connected by a first connector. A clamping part is provided on the side of the fixing part, and has a mounting position adapted to the cooling nozzle.

[0012] Specifically, the clamping part is hinged to the fixing part and locked in place by the second connector.

[0013] Specifically, the cooling nozzle is hinged within the mounting position.

[0014] This utility model's hot melt groove has a gradually increasing inner diameter from the bottom to the opening, and is provided with a first arc-shaped concave portion and a second arc-shaped concave portion. Through the gradual inner diameter design, a pressure gradient is formed in the groove during the hot melting process, which enhances the material fluidity, improves the wettability of the welding interface, avoids stress concentration caused by abrupt changes in inner diameter, reduces the risk of weld cracking, and improves welding strength. The inner diameter of the second arc-shaped concave portion is larger than that of the first arc-shaped concave portion, forming a larger welding space and enhancing welding strength. This invention optimizes the material distribution during the welding process through a double arc design, improving welding quality and reliability. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a magnified schematic diagram of the hot melt groove area; Figure 4 This is a schematic diagram of the gripper's state structure. Figure 1 ; Figure 5 This is a schematic diagram of the gripper's state structure. Figure 2 ; In the diagram, 100 is the hot melt body, 110 is the hot melt groove, 111 is the first arc-shaped concave portion, and 112 is the second arc-shaped concave portion. 200 is the cooling nozzle. 300 is the gripper, 310 is the fixing part, and 320 is the clamping part. Detailed Implementation

[0016] The embodiments of this utility model 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 elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0017] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "vertical," and "horizontal," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The following is for reference. Figure 1-5 Describe this utility model; A photovoltaic junction box hot-melt head includes a hot-melt body 100, and a hot-melt groove 110 is provided at the bottom of the hot-melt body 100; The hot melt groove 110 has an inner diameter that gradually increases from the bottom to the opening, and is provided with a first arc-shaped concave portion 111 and a second arc-shaped concave portion 112. Through the gradual inner diameter design, the molten material forms a pressure gradient in the groove during the hot melt process, which enhances the material fluidity, improves the wettability of the welding interface, avoids stress concentration caused by abrupt change in inner diameter, reduces the risk of weld cracking, and improves welding strength. The inner diameter of the second arc-shaped concave portion 112 is larger than the inner diameter of the first arc-shaped concave portion 111; the inner diameter of the second arc-shaped concave portion 112 is larger than the inner diameter of the first arc-shaped concave portion 111, forming a larger welding space and enhancing the welding strength; that is, through the double arc design, the material distribution in the welding process is optimized, and the welding quality and reliability are improved. The vertical height H from the bottom to the opening of the hot melt groove 110 is less than the inner diameter R of the opening of the hot melt groove 110. By limiting the groove depth, insufficient material flow during the welding process can be avoided due to excessive groove depth, which would affect the welding quality.

[0020] The bottom of the hot melt groove 110 is flat in the middle. This provides a stable support surface, ensuring good contact between the hot melt head and the component surface during welding, and avoiding welding defects caused by uneven groove bottom.

[0021] Vertical height H = (2~3) * inner diameter R. This avoids welding quality problems caused by grooves that are too shallow or too deep, and improves welding strength and reliability.

[0022] The vertical height is 1.2~1.6mm.

[0023] The opening of the hot melt groove 110 is provided with an arc-shaped chamfer.

[0024] The hot melt body 100 is equipped with an electric heating rod and a temperature sensor. The electric heating rod and temperature sensor in this case are the same as those in the prior art, such as a single heat source multi-point hot melt tooling authorized on July 6, 2022, patent number 2022217412174.

[0025] The hot melt body 100 is equipped with a connected cooling nozzle 200. The cooling nozzle is connected to the air source through the pipe body. The cooling nozzle 200 blows air to cool the area around the hot melt position, thereby improving processing efficiency.

[0026] Cooling nozzle 200 is fixedly mounted on hot melt body 100 by clamp 300; The gripper 300 includes: The fixing part 310 is ring-shaped and includes a first half-ring and a second half-ring. One end of the first half-ring is hinged to the second half-ring, and the other end is fixedly connected by a first connector. The clamping part 320 is provided on the side of the fixing part 310 and has a mounting position adapted to the cooling nozzle 200.

[0027] The clamping part 320 is hinged to the fixing part 310 and locked in place by the second connector. That is, when the second connector is loosened, the clamping part 320 can rotate up and down on the fixing part 310 to adjust the angle of the cooling nozzle 200. After adjustment, the second connector can be tightened in place.

[0028] The cooling nozzle 200 is hinged in the mounting position to achieve the angle adjustment of the cooling nozzle. After the adjustment is completed, it can be fixed to the clamping part 320 using the third connector.

[0029] Regarding the information disclosed in this case, the following points need to be clarified: (1) The accompanying drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case. Other structures can refer to the general design. (2) Where there is no conflict, the embodiments and features disclosed in this case can be combined with each other to obtain new embodiments; The above are merely specific embodiments disclosed in this case, but the scope of protection of this disclosure is not limited thereto. The scope of protection disclosed in this case shall be determined by the scope of protection of the claims.

Claims

1. Photovoltaic junction box hot melt head, characterized in that, It includes a hot melt body (100), and the bottom of the hot melt body (100) is provided with a hot melt groove (110); The hot melt groove (110) gradually increases in inner diameter from the bottom to the opening, and is provided with a first arc-shaped concave portion (111) and a second arc-shaped concave portion (112). The inner diameter of the second arc-shaped concave portion (112) is larger than the inner diameter of the first arc-shaped concave portion (111); The vertical height H from the bottom to the opening of the hot melt tank (110) is less than the inner diameter R of the opening of the hot melt tank (110).

2. The photovoltaic junction box hot melt head of claim 1, wherein, The bottom of the hot melt tank (110) is a plane in the middle.

3. The photovoltaic junction box hot melt head of claim 1, wherein, The vertical height H = (2~3) * inner diameter R.

4. The photovoltaic junction box hot melt head of claim 1, wherein, The vertical height is 1.2~1.6mm.

5. The photovoltaic junction box hot melt head of claim 1, wherein, The opening of the hot melt groove (110) is provided with an arc-shaped chamfer.

6. The photovoltaic junction box hot melt head of claim 1, wherein, The hot melt body (100) is equipped with an electric heating rod and a temperature sensor.

7. The photovoltaic junction box hot melt head of claim 1, wherein, The hot melt body (100) is provided with a connected cooling nozzle (200).

8. The photovoltaic junction box hot melt head of claim 7, wherein, The cooling nozzle (200) is fixedly mounted on the hot melt body (100) by a clamp (300); the clamp (300) includes: The fixing part (310) is ring-shaped and includes a first half-ring and a second half-ring. One end of the first half-ring is hinged to the second half-ring, and the other end is fixedly connected by a first connector. The clamping part (320) is provided on the side of the fixing part (310) and has a mounting position adapted to the cooling nozzle (200).

9. The photovoltaic junction box hot melt head of claim 8, wherein, The clamping part (320) is hinged to the fixing part (310) and locked in place by the second connector.

10. The photovoltaic junction box hot melt head of claim 8, wherein, The cooling nozzle (200) is hinged in the mounting position.

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