Welding head for tin soldering of junction box
By designing ceramic welding heads and square copper pipe welding heads for junction boxes, the problems of unsolid welding, long time and low heat transfer efficiency of junction boxes are solved, high-quality and rapid welding results are achieved, and the stability of the photovoltaic power generation system is improved.
Patent Information
- Application Number
- CN202420858840.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-04-24
AI Technical Summary
The existing junction box welding technology has problems such as insolid welding, long time, low heat transfer efficiency, and easy yellowing or breakdown of bus bars, which affects the stable operation of the photovoltaic power generation system.
A welding joint for junction box soldering is designed, including ceramic welding heads and copper tubes. The heating part of the copper tube is a square structure that fully fits the ceramic welding heads. The heat transfer part is covered with heat insulation materials to ensure rapid and even heat transfer.
It improves welding quality and efficiency, shortens welding time, enhances welding firmness, prevents poor tin syrup and heat loss, and avoids yellowing or breakdown of bus bars.
Smart Images
Figure CN222778955U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a soldering joint, in particular to a soldering joint used for soldering a junction box. Background Art
[0002] In recent years, with the continuous reduction of the cost of photovoltaic power generation, photovoltaic power generation has gradually become the main energy source in the new power system. As the core power generation equipment of photovoltaic power stations, the safety and reliability of component products will directly affect the long-term stable operation of power stations and even power systems. As an important component, the junction box is responsible for current output and bypass. The reliability and stability of its welding directly affect the stable operation of the photovoltaic power generation system. At present, the welding of the junction box mainly involves soldering the lead wire to the metal part of the box body. Poor tinning or unmelted tin at the bottom of the junction box causes a long welding time; problems such as cold soldering or loose welding of the lead wire will cause poor contact and resistive thermal effect in the subsequent operation of the power station. The continuous heating at the cold soldering position causes the junction box to deform. In severe cases, the junction box burns and even causes a fire. In order to improve the welding quality of the junction box and shorten the welding time, a square ceramic welding head is used for tin soldering. During welding, the welding wire is gradually fed to the square ceramic welding head to add excessive solder to improve the welding quality of the junction box. After replacing the square ceramic welding head, the fit with the original round copper tube is poor. The round copper tube cannot completely fit the ceramic welding head, resulting in heat transfer loss, poor welding effect or too long welding time. The shape of the copper tube is artificially intervened to make it fit the square ceramic welding head. Due to the hollow structure inside the copper tube, it is very easy to cause damage or blockage to the copper tube; at the same time, the ceramic welding head cannot pass through the copper tube, causing the copper tube to directly contact the bus bar, causing the bus bar to turn yellow or break through and melt. Utility Model Content
[0003] Purpose of the utility model: The purpose of the utility model is to improve the welding quality of the junction box and to provide a welding head for soldering the junction box.
[0004] Technical solution: The welding head for soldering the junction box described in the utility model includes a ceramic welding head and a copper tube for heating the ceramic welding head, and the copper tube includes a heat transfer part and a heating part; the heating part is a square structure that is completely fitted on the outer wall of the ceramic welding head.
[0005] Furthermore, the heating part is set according to the size of the ceramic welding head, which is 6.3*5.75mm. The heating part of the copper tube fits the square ceramic welding head completely, and can quickly and evenly transfer heat to the welding area of the ceramic welding head, quickly melt the welding wire, accelerate the flow rate of the welding wire, increase the amount of welding wire liquid reaching the welding area, better cover the welding area, and improve the welding quality; at the same time, the welding wire liquid flows quickly, which improves the welding efficiency and thus improves the production efficiency of the production line.
[0006] Furthermore, a chamfer is provided at the connection of the inner wall of the heating part to promote the fit between the heating part and the ceramic welding head, thereby further promoting the rapid transfer of heat to the welding area of the ceramic welding head.
[0007] Furthermore, the heating portion is 3-5 mm high, which promotes more heat to be quickly and evenly transferred to the welding area of the ceramic welding head, accelerates the rapid melting and flowing of the welding wire, and prevents poor welding caused by poor tinning.
[0008] Furthermore, the ceramic welding head protrudes from the heating portion by 1-2 mm, preferably 1 mm, so as to prevent the copper tube from directly contacting assembly parts in the welding area, such as bus bars, and prevent the bus bars from yellowing or breaking through and melting.
[0009] Furthermore, the heat transfer part is coated with a heat-insulating material to prevent heat loss, so that the heat of the copper tube can be quickly and effectively transferred to the welding area of the ceramic welding head; at the same time, the heat-insulating material can also play an identification role, which is suitable for different welding needs and facilitates the production line employees to quickly prepare, assemble and replace the ceramic welding head to prevent mixing with the original round ceramic welding head.
[0010] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. Tinning soldering avoids poor solder joints and long welding time caused by poor melting of the bottom tin of the junction box, thereby improving the welding quality of the junction box and shortening the welding time; 2. The square copper tube and the square ceramic welding head are fitted together, which increases the heat transfer efficiency and prevents poor welding caused by poor tinning; 3. The ceramic welding head extends out of the copper tube to prevent the copper tube from directly contacting the bus bar in the junction box to cause yellowing or breakdown and melting; 4. The heat transfer part is coated with insulation material to prevent heat loss, so that the heat of the copper tube is quickly and effectively transferred to the welding area of the ceramic welding head, and at the same time plays an identification role, which is suitable for different welding needs and convenient for production line employees to quickly prepare assembly and replacement of ceramic welding heads to prevent mixing with the original round ceramic welding heads. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the structure of the utility model;
[0012] Figure 2 It is a bottom view schematic diagram of the utility model. DETAILED DESCRIPTION
[0013] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.
[0014] like Figure 1 A welding head for soldering a junction box shown in FIG. 1 comprises a ceramic welding head 1 and a copper tube for heating the ceramic welding head 1, wherein the copper tube comprises a heat transfer portion 3 and a heating portion 2; Figure 2The heating part 2 is set to be a square structure that completely fits on the outer wall of the ceramic welding head 1 according to the size of the ceramic welding head 1, and the size is 6.3*5.75*4mm; the inner wall of the heating part 2 is connected with a chamfer 4 to promote the fit between the heating part 2 and the ceramic welding head 1. The length of the ceramic welding head 1 protruding from the heating part 2 is 1mm, and the heat transfer part 3 is coated with a heat insulating material.
[0015] The modified welding head is used to weld the junction box. During the welding process, solder is dripped above the welding wire adding area of the ceramic welding head 1, and the square heating part 2 of the copper tube is completely in contact with the welding area of the ceramic welding head 1 to heat the solder, so that the solder melts quickly and flows to the welding part of the junction box to fully cover the lead-out wires, thereby increasing the firmness of the welding and improving the welding quality. At the same time, because the square heating part 2 is completely in contact with the welding area of the ceramic welding head 1 to heat the solder, the heat transfer efficiency is improved, the melting and flowing speed of the solder is accelerated, thereby improving the welding efficiency and the production efficiency.
Claims
1. A welding head for soldering a junction box, comprising a ceramic welding head (1) and a copper tube for heating the ceramic welding head (1), wherein the copper tube comprises a heat transfer portion (3) and a heating portion (2); characterized in that: The heating part (2) is a square structure that is completely fitted on the outer wall of the ceramic welding head (1).
2. The welding head for soldering a junction box according to claim 1, characterized in that: The heating part (2) is set according to the size of the ceramic welding head (1), and the size is 6.3*5.75mm.
3. The welding head for soldering a junction box according to claim 2, characterized in that: The inner wall connection of the heating portion (2) is provided with a chamfer (4) for promoting the fitting of the heating portion (2) and the ceramic welding head (1).
4. The welding head for soldering a junction box according to claim 2, characterized in that: The heating part (2) is 3-5 mm high.
5. The welding head for soldering a junction box according to claim 1, characterized in that: The ceramic welding head (1) protrudes from the heating part (2) by 1-2 mm.
6. The welding head for soldering a junction box according to claim 1, characterized in that: The ceramic welding head (1) protrudes from the heating part (2) by 1 mm.
7. The welding head for junction box soldering according to claim 1, characterized in that: The heat transfer part (3) is coated with a heat insulating material for preventing heat loss.