Center bracket T-shaped pressure head applied to laser welding of photovoltaic module wire box
Through the design of the brace-shaped T-shaped indenter, the problem of the inability to effectively press the two sides of the welding slot during laser welding of the line box of the photovoltaic module is solved, the close contact of the welding area and the optimization of welding energy is achieved, and the welding quality is improved and efficiency.
Patent Information
- Application Number
- CN202421065085.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-05-16
AI Technical Summary
During the laser welding of existing photovoltaic module wire box, the two sides of the welding slot cannot be effectively pressed together, which makes it difficult to achieve full contact between the bus bar and the wire box, affecting the welding quality, and requires welding of too short or too long bus bars, resulting in welding. Energy wasted.
A middle bracket T-shaped indenter, including a strip-shaped plate-shaped structure, a U-shaped via, a connecting passage, a first pressure plate, a second pressure plate and a third pressure plate, is used to form a T-shaped structure to ensure that the two sides of the welding groove are in close contact and shrinkage. In the welding area, the ends of the bus bar that are too long or too short are pressed through the third press plate to avoid unnecessary welding.
The contact area and density of the welding area are improved, the yield rate and appearance inspection rate are improved, the amount of welding energy is reduced, the problem of blackening and burn-through of welding is avoided, and the heat dissipation speed and welding efficiency are improved.
Smart Images
Figure CN222359485U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of laser welding of photovoltaic component wire boxes, and in particular to a middle bracket T-shaped pressure head used for laser welding of photovoltaic component wire boxes. Background Art
[0002] During the laser welding process of photovoltaic module junction boxes, it is extremely critical to ensure that the busbar and the welding base plate of the junction box are in full and close contact. The larger the contact area, the better the welding effect. However, currently on the market, the welding pressing method for the junction box is mainly performed by pressing the welding blocks on the head and tail sides. However, the existing pressing blocks are in a strip-shaped structure, which makes it impossible to effectively press the two sides of the welding slot, and easily causes the welding area to warp up, making it difficult for the busbar to fully contact the junction box. After laser welding, this will have a significant adverse effect on the welding quality. In addition, for busbars that are too short or too long, the existing pressing heads need to be welded, which results in a waste of welding energy. Utility Model Content
[0003] In view of this, the utility model proposes a middle bracket T-shaped pressure head used for laser welding of photovoltaic module junction boxes, the purpose of which is to ensure that when the bus bar is pressed into the junction box, the two sides of the welding slot will not be warped during welding, while reducing the welding area and the use of welding energy.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A middle bracket T-shaped pressure head used for laser welding of photovoltaic module junction boxes, comprising a pressure head body with a strip plate structure, on which a mounting hole is provided; one end of the pressure head body is provided with a U-shaped through hole with a lateral opening along the top-bottom direction, a connecting passage is fixedly provided around the U-shaped through hole on the bottom surface of the pressure head body, a first pressure plate is provided on one side of the bottom port of the connecting passage, a second pressure plate parallel to the first pressure plate is provided on the other side of the bottom port of the connecting passage, a middle bracket groove extending from top to bottom is provided on the side wall of the first pressure plate facing the second pressure plate, a third pressure plate parallel to the two sides of the middle bracket groove is provided in the middle of the middle bracket groove, a gap is provided between the free end of the third pressure plate and the second pressure plate, and the first pressure plate and the third pressure plate form a T-shaped structure.
[0006] In order to better implement the above technical solution, optionally, the connecting passage is a tapered necking structure with a quadrilateral cross section.
[0007] Optionally, an extension opening communicating with the top and bottom of the lateral opening of the U-shaped through hole is provided on the upper side of the connecting passage.
[0008] Optionally, the pressure head body, the connecting passage, the first pressure plate, the second pressure plate and the third pressure plate are an integrated structure.
[0009] Optionally, the mounting holes are two tapered holes arranged at intervals.
[0010] Beneficial effects of the utility model:
[0011] The utility model is a middle bracket T-shaped pressure head used for laser welding of photovoltaic module wire boxes. The second pressure plate and the first pressure plate with a middle bracket groove act on the bus bar, so that both sides of the head end of the welding area are in full contact with the bottom plate of the wire box, and the pressing tightness is higher than before. The larger the contact area, the higher the yield rate of laser welding and the appearance inspection rate after welding. In addition, the heat dissipation area formed on both sides of the laser welding can speed up the heat dissipation speed of single-area welding, avoid the heat overlap of the two laser welding areas, resulting in excessive laser welding energy and the occurrence of problems such as black welding and burn-through. At the same time, the third pressure plate is used to press the ends of some overly long bus bars or to block the vacant positions formed by some overly short bus bars to avoid welding here, which can reduce the welding area and reduce the amount of welding energy used. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a three-dimensional schematic diagram of an angle of a middle bracket T-shaped pressure head used for laser welding of photovoltaic module wire boxes according to an embodiment of the utility model;
[0013] Figure 2 It is a three-dimensional schematic diagram of another angle of a middle bracket T-shaped pressure head used for laser welding of photovoltaic module wire boxes according to an embodiment of the utility model;
[0014] Figure 3 yes Figure 1 Application diagram;
[0015] Reference numerals:
[0016] The pressure head body 11 , the mounting hole 12 , the U-shaped through hole 13 , the connecting passage 14 , the first pressure plate 15 , the middle bracket groove 16 , the second pressure plate 17 , the third pressure plate 18 , the extended opening 19 , the bus bar 20 , the welding area, and the junction box 30 . DETAILED DESCRIPTION
[0017] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the same components are represented by the same reference numerals.
[0018] See also Figure 1 and Figure 2The utility model embodiment discloses a middle bracket T-shaped pressure head used for laser welding of photovoltaic module junction box 30, including a pressure head body 11 of strip plate structure, and a mounting hole 12 is opened on the pressure head body 11. Specifically, the mounting hole 12 is two tapered holes, and the two tapered holes are arranged at intervals from one end to the middle along the length direction of the pressure head body 11. The two tapered holes are fixed to the lifting mechanism by bolts passing through the tapered holes, thereby ensuring the stability of the pressure head body 11 during the welding process.
[0019] The other end of the pressure head body 11 is provided with a U-shaped through hole 13 with a lateral opening along the top and bottom direction thereof, and a connecting passage 14 is fixedly provided on the bottom surface of the pressure head body 11 around the U-shaped through hole 13. The connecting passage 14 is a conical shrinking structure with a quadrilateral cross section, and a first pressing plate 15 is provided on one side of the bottom end of the connecting passage 14, and a second pressing plate 17 parallel to the first pressing plate 15 is provided on the other side of the bottom end of the connecting passage 14. The side wall of the first pressing plate 15 facing the second pressing plate 17 has a A middle bracket groove 16 extends from the bottom, and a third pressure plate 18 parallel to the two sides of the middle bracket groove 16 is provided in the middle of the middle bracket groove 16. There is a gap between the free end of the third pressure plate 18 and the second pressure plate 17. The first pressure plate 15 and the third pressure plate 18 form a T-shaped structure. The first pressure plate 15 is pressed on the head end and both sides of the welding slot, and the third pressure plate 18 is pressed on the vacant position or the convergence strip. The connecting aisle 14 is a tapered necking structure, which helps to better concentrate the laser energy and enhance the welding effect.
[0020] In an embodiment of the utility model, an extended opening 19 is provided on the upper side of the connecting passage 14 and is connected to the top and bottom of the lateral opening of the U-shaped through hole 13. The extended opening 19 can be used as an observation window, which is convenient for real-time monitoring of welding quality, and can also detect problems in time and make adjustments.
[0021] In the embodiment of the present invention, the pressure head body 11, the connecting passage 14, the first pressure plate 15, the second pressure plate 17 and the third pressure plate 18 are an integrated structure, so that the entire pressure head structure is more durable and not easy to be damaged.
[0022] like Figure 3As shown, the first pressing plate 15, the second pressing plate 17 and the third pressing plate 18 press the bus bar 20 and the bottom plate of the junction box 30 through a lifting mechanism, wherein the top layer is the first pressing plate 15, the second pressing plate 17 and the third pressing plate 18, 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, the first pressing plate 15 and the second pressing plate 17 press down the head and tail ends and both sides of the welding slot of the bus bar 20 evenly, and the third pressing plate 18 is directly pressed on the vacant position of the welding slot or the end of part of the bus strip, so that the entire surface of the bus bar 20 can be flatly pressed on the bottom plate of the welding junction box 30 to achieve effective welding. By means of the first pressing plate 15 having the middle bracket groove 16, the two sides of the welding slot of the busbar 20 can be pressed together, so that there will be no upward warping when welding the two sides of the welding slot of the busbar 20. The first pressing plate 15 having the middle bracket groove 16 cooperates with the second pressing plate 17 with a strip structure to effectively frame the welding area, avoid the deviation of the welding position, ensure that each welding is in the same reference position, and effectively guarantee the welding size. By adding the third pressing plate 18, for some busbars 20 that are too long, they can be directly pressed together at the end of their excess length, and the busbar 20 pressed together by the third pressing plate 18 will not be welded, but only pressed together; and for busbars 20 that are too short, they can be directly pressed together at the vacant position of the welding slot to avoid being welded there. In this way, the heat generated during the laser welding process is isolated by the first pressure plate 15, the second pressure plate 17 and the third pressure plate 18, and the heat is dissipated through independent channels on both sides of the welding area 21, which can dissipate heat more quickly and evenly, effectively reduce the accumulation of welding impurities and smoke generated during the welding process, ensure the welding effect, greatly improve the laser welding efficiency, and reduce welding energy.
[0023] During welding, the welding device sequentially penetrates the U-shaped through hole 13 and the connecting passage 14, and then welds the bus strip 20 in the area formed by the first pressure plate 15, the second pressure plate 17, and the third pressure plate 18, ensuring that each welding in the width direction of different bus bars 20 can be carried out in the designated area, and the heat generated by the welding is dissipated through the areas on both sides of the welding area, avoiding the blackening of the welding point and the occurrence of adverse conditions caused by over-welding due to heat dissipation.
[0024] The utility model acts on the busbar 20 through the second pressing plate 17 and the first pressing plate 15 with the middle bracket groove 16, so that both sides of the head end of the welding area are in full contact with the bottom plate of the junction box 30, and the pressing tightness is higher than before. The larger the contact area, the higher the yield rate of laser welding and the appearance inspection rate after welding. In addition, the heat dissipation area formed on both sides of the laser welding can speed up the heat dissipation speed of single-area welding, avoid the heat overlap of the two laser welding areas, resulting in excessive laser welding energy and the occurrence of problems such as black welding and burn-through. At the same time, the third pressing plate 18 is used to press the ends of the busbar 20 that is too long or to block the vacant position formed by the busbar 20 that is too short to avoid welding here, which can reduce the welding area and reduce the amount of welding energy used.
[0025] The technical solution of the utility model is described in detail above in combination with specific embodiments, and the described specific embodiments are used to help understand the concept of the utility model. Derivations and variations made by those skilled in the art based on the specific embodiments of the utility model also fall within the protection scope of the utility model.
Claims
1. A middle bracket T-shaped pressure head used for laser welding of photovoltaic module wire boxes, comprising a pressure head body (11) of a strip plate structure, wherein a mounting hole (12) is provided on the pressure head body (11); characterized in that: A U-shaped through hole (13) with a lateral opening is provided at one end of the pressure head body (11) along the top-bottom direction, and a connecting passage (14) is fixedly provided on the bottom surface of the pressure head body (11) around the U-shaped through hole (13). A first pressing plate (15) is provided on one side of the bottom end of the connecting passage (14), and a second pressing plate (17) parallel to the first pressing plate (15) is provided on the other side of the bottom end of the connecting passage (14). The side wall of the first pressing plate (15) facing the second pressing plate (17) has a middle bracket groove (16) extending from top to bottom, and a third pressing plate (18) parallel to both sides of the middle bracket groove (16) is provided in the middle of the middle bracket groove (16), and a gap is provided between the free end of the third pressing plate (18) and the second pressing plate (17), and the first pressing plate (15) and the third pressing plate (18) form a T-shaped structure.
2. According to claim 1, a middle bracket T-shaped pressure head used for laser welding of photovoltaic module wire boxes is characterized in that: The connecting passage (14) is a tapered necking structure with a quadrilateral cross section.
3. The middle bracket T-shaped pressure head used for laser welding of photovoltaic module wire boxes according to claim 1 is characterized in that: An extension opening (19) is provided on the upper side of the connecting passage (14) and is connected to the top and bottom of the lateral opening of the U-shaped through hole (13).
4. The middle bracket T-shaped pressure head used for laser welding of photovoltaic module wire boxes according to claim 1, characterized in that: The pressure head body (11), the connecting passage (14), the first pressure plate (15), the second pressure plate (17) and the third pressure plate (18) are an integrated structure.
5. The middle bracket T-shaped pressure head 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.