Photovoltaic diode easy to weld

Abstract

The utility model discloses a photovoltaic diode easy to weld in the technical field of photovoltaic diode welding, which comprises a first welding plate and a second welding plate, the first welding plate is fixedly connected with the second welding plate, a plastic shell is sleeved at the joint of the first welding plate and the second welding plate, the second welding plate is fixedly connected with a wiring terminal, and the wiring terminal is fixedly connected with the plastic shell. A welding table is fixedly connected to the first welding plate, and a positioning hole is formed in the first welding plate. By arranging the structures such as the pressure relief grooves and the like, the gradually narrowed groove body structures of the trapezoidal pressure relief grooves can guide gas generated by welding to diffuse and avoid gas retention, so that formation of air holes is reduced, the purpose of improving the mechanical strength and the conductivity of welding spots is achieved, meanwhile, the welding surface area is increased, the welding contact area is enlarged, and the welding quality is improved. And the stability of welding spots is enhanced, so that the photovoltaic diode is more suitable for a welding processing technology.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic diode welding technical field, especially in kind of easy welding photovoltaic diode. BACKGROUND

[0002] Laser welding has significant advantages in photovoltaic module manufacturing, including high precision and controllability, which can accurately control the welding position and energy, reducing the thermal impact on the surrounding material; high welding strength ensures that the connection between the bus bar and the diode pad is more secure, reducing the risk of false welding or disconnection; and non-contact welding avoids mechanical damage or pollution that may be caused by traditional welding. In contrast, traditional welding methods have obvious limitations: manual welding relies on the technical level of the operator, which is prone to inconsistent quality and low efficiency; ordinary automatic welding requires high welding surface and has a large thermal impact, which may damage the material; ultrasonic welding is suitable for some scenes, but it has high requirements for the material surface and limited welding strength. With the development of photovoltaic module manufacturing towards high efficiency and automation, laser welding as an advanced technology can meet the needs of large-scale and high-precision production, and gradually becomes the mainstream technology.

[0003] However, the prior art has some problems: during the welding of the photovoltaic diode, the gas generated by the welding is easy to form pores or bubbles at the welding point, thereby reducing the strength and conductivity of the welding point, and the welding slag generated during welding is easy to splash, which can contaminate the positioning column and even cause wear, thereby reducing the positioning accuracy of the diode, so we propose a kind of easy welding photovoltaic diode. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model provides a kind of easy welding photovoltaic diode

[0005] The utility model aims at realizing the following: a kind of easy welding photovoltaic diode, including first welding plate and second welding plate, the first welding plate is fixedly connected with second welding plate, the first welding plate is connected with the plastic shell of second welding plate connection, the second welding plate is fixedly connected with the terminal, the first welding plate is fixedly connected with the welding station, the first welding plate is equipped with positioning hole, the first welding plate is provided with flange, the first welding plate is correspondingly set with second welding plate.

[0006] Optionally, the welding station is provided with a placing groove, and the placing groove is provided with a welding surface, and the placing groove is provided with a pressure relief groove.

[0007] Optionally, the number of pressure relief grooves is two, and the two pressure relief grooves are symmetrically distributed on both sides of the welding surface, the pressure relief grooves are arranged in a trapezoidal shape, and the pressure relief grooves are arranged above and below the welding surface.

[0008] Optionally, the positioning hole is open at both ends, and the positioning hole is arranged in a tapered structure, and the positioning hole is arranged with a rounded corner at the opening at both ends.

[0009] Optionally, the flange is located between the welding table and the positioning hole, the flange is close to the welding table, the flange is arranged in an arc shape, and the opening of the flange corresponds to the welding table.

[0010] Optionally, the length of the flange corresponds to the welding table, both ends of the flange are arranged in a flow guide, and the height of the flange is higher than that of the welding table.

[0011] Compared with the prior art, the beneficial effects of the present application are as follows:

[0012] 1. By arranging the pressure relief groove and other structures, the tapered groove body structure of the trapezoidal pressure relief groove can guide the gas generated by welding to diffuse to both sides of the welding surface, avoid the gas to stay at the welding point, thereby reducing the formation of pores, achieving the purpose of improving the mechanical strength and electrical conductivity of the welding point, and at the same time, the area of the welding surface is increased, the welding contact area is further expanded, and the stability of the welding point is enhanced, so that the photovoltaic diode is more suitable for the high-precision processing technology of laser welding.

[0013] 2. By arranging the flange structure, the flange can block the spattering of welding slag to a certain extent during welding, on the one hand, the positioning column is protected, the cleanliness and precision of the positioning column can be maintained, the welding slag pollution and wear are avoided, and the positioning precision of welding is improved; on the other hand, the spattering of welding slag is reduced, the cleaning is facilitated, the equipment maintenance frequency and cost are reduced, and the service life of the equipment is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0015] Fig. 1 is the overall structure schematic view provided by the present application.

[0016] Fig. 2 is the positioning hole structure schematic view provided by the present application.

[0017] Fig. 3 is the welding table structure schematic view provided by the present application.

[0018] In the figure: 1, plastic shell; 11, first welding plate; 12, second welding plate; 13, terminal; 2, welding table; 21, placing groove; 22, welding surface; 23, pressure relief groove; 3, positioning hole; 4, flange. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figs. 1 to 3 The illustrated easy-to-solder photovoltaic diode includes a first soldering plate 11 and a second soldering plate 12. The first soldering plate 11 and the second soldering plate 12 are fixedly connected. A plastic shell 1 is sleeved at the connection between the first soldering plate 11 and the second soldering plate 12. A terminal block 13 is fixedly connected to the second soldering plate 12. A soldering station 2 is fixedly connected to the first soldering plate 11. A positioning hole 3 is opened on the first soldering plate 11. A flange 4 is provided on the first soldering plate 11. The first soldering plate 11 and the second soldering plate 12 are correspondingly arranged.

[0021] Furthermore, firstly, the plastic shell 1 is used to protect the welding area from external environmental corrosion, and at the same time, it can enhance the insulation and durability of the overall structure to make it suitable for complex working environments.

[0022] Secondly, existing diodes have riveted terminals on both ends, and current junction boxes are designed to be very small in order to reduce the amount of potting compound. When assembling the diode, one end of the riveted terminal has to be cut off, otherwise it cannot be installed. Therefore, the diode of this application has the terminal 13 designed on one side of the module to meet the requirements of easy component soldering and new soldering process.

[0023] Furthermore, the welding table 2 provides precise positioning and support for the busbar, ensuring the stability and consistency of the welding process and reducing welding defects; the positioning hole 3 can further optimize the alignment accuracy during welding, reduce the difficulty of operation, and improve production efficiency.

[0024] It should be noted that, because laser welding requires a larger diode pad area, the embodiment provided by this utility model has a larger welding surface, making it easier to weld the busbar and better meeting the requirements of the laser welding process between the photovoltaic module solder strip and the diode welding surface. At the same time, the increased diode welding area is more conducive to the diode's heat dissipation.

[0025] Specifically, the welding table 2 is provided with a placement groove 21, a welding surface 22 is provided in the placement groove 21, and a pressure relief groove 23 is provided in the placement groove 21. There are two pressure relief grooves 23, which are symmetrically distributed on both sides of the welding surface 22. The pressure relief grooves 23 are arranged in a trapezoidal shape and are arranged vertically with the welding surface 22.

[0026] It should be noted that during welding, the gas generated at high temperature is prone to form pores at the welding point, affecting the welding quality. The tapered groove structure of the trapezoidal pressure relief groove 23 gradually narrows the gas flow channel, increases the speed and directionality of gas flow, and enables the gas to be quickly and orderly discharged from the welding area, effectively preventing the accumulation of gas at the welding point. Not only can it optimize the gas flow path during welding, but also can improve the cleanliness of the welding surface, thereby providing a more stable environment for the formation of the welding point.

[0027] Specifically, the positioning hole 3 is open at both ends and has a tapered structure. The two ends of the positioning hole 3 are provided with rounded corners.

[0028] Further, first, the tapered structure can guide the positioning pin or connecting piece to enter accurately, reducing the deviation during assembly and improving the positioning accuracy and assembly efficiency. Second, the rounded corners effectively reduce stress concentration during assembly, preventing cracks or wear on the edges of the positioning hole 3 due to excessive force, thereby prolonging the service life of the component. In addition, the rounded corners also reduce the frictional resistance during assembly, making it easier to insert and remove the positioning pin or connecting piece, simplifying the operation process.

[0029] Specifically, the flange 4 is located between the welding table 2 and the positioning hole 3, and the flange 4 is close to the welding table 2. The flange 4 is arc-shaped, the opening of the flange 4 corresponds to the welding table 2, the length of the flange 4 corresponds to the welding table 2, and the two ends of the flange 4 are flow-guiding. The height of the flange 4 is higher than that of the welding table 2.

[0030] Further, the arc-shaped flange 4 can effectively block the residues and splashes generated during welding, preventing them from splashing onto the positioning column, thereby protecting the cleanliness and accuracy of the positioning column and avoiding affecting the positioning function due to residue accumulation.

[0031] Second, the arc-shaped design of the flange 4 makes the flow path of the residues, making it easier to collect or discharge the welding residues, reducing the difficulty and frequency of cleaning work. In addition, the corresponding arrangement of the flange 4 and the welding table 2 ensures the concentration and stability of the welding area, thereby improving the welding quality and efficiency.

[0032] Working principle: During welding, the gas generated at high temperature is guided by the trapezoidal pressure relief groove 23 and quickly and orderly discharged from the welding area through the gas flow channel, effectively preventing the accumulation of gas at the welding point. The increased welding surface 22 not only expands the actual contact area of welding, but also reduces the risk of local stress concentration. Moreover, by setting the flange 4 structure, the flange 4 can block the splashing of welding residues to a certain extent during welding. On the one hand, it protects the positioning column and maintains the cleanliness and accuracy of the positioning column, avoiding contamination and wear of the welding residues and improving the positioning accuracy of welding. On the other hand, the reduction of welding residue splashing facilitates cleaning, reduces equipment maintenance frequency and cost, and prolongs the service life of the equipment.

[0033] The above description of the embodiments is only to help understand the method of the present application and its core idea. It should be pointed out that, for those skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A solderable photovoltaic diode comprising a first solder plate (11) and a second solder plate (12), characterized in that: The first welding plate (11) is fixedly connected with the second welding plate (12), a plastic shell (1) is sleeved at the connecting position of the first welding plate (11) and the second welding plate (12), the second welding plate (12) is fixedly connected with a wiring terminal (13), the first welding plate (11) is fixedly connected with a welding table (2), a positioning hole (3) is formed in the first welding plate (11), a flange (4) is arranged on the first welding plate (11), and the first welding plate (11) is correspondingly arranged with the second welding plate (12).

2. A solderable photovoltaic diode according to claim 1, characterized in that: A placing groove (21) is formed in the welding table (2), a welding surface (22) is arranged in the placing groove (21), and a pressure relief groove (23) is formed in the placing groove (21).

3. A solderable photovoltaic diode according to claim 2, wherein: The number of the pressure relief grooves (23) is two, the two pressure relief grooves (23) are symmetrically distributed on both sides of the welding surface (22), the pressure relief grooves (23) are arranged in a trapezoidal shape, and the pressure relief grooves (23) are arranged in an up-down mode with the welding surface (22).

4. The solderable photovoltaic diode of claim 1, wherein: The positioning hole (3) is open at both ends, the positioning hole (3) is arranged in a tapered structure, and the positioning hole (3) is arranged with rounded corners at both ends.

5. The solderable photovoltaic diode of claim 1, wherein: The flange (4) is located between the welding table (2) and the positioning hole (3), the flange (4) is close to the welding table (2), the flange (4) is arranged in an arc shape, and the opening of the flange (4) corresponds to the welding table (2).

6. The solderable photovoltaic diode of claim 1, wherein: The length of the flange (4) corresponds to the welding table (2), the two ends of the flange (4) are arranged in a flow guide mode, and the height of the flange (4) is higher than that of the welding table (2).

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