Welding strip pressing tool

Abstract

The utility model discloses a welding strip pressing tool, and relates to the field of battery series welding equipment. Comprising a pressing needle mounting plate, and the pressing needle mounting plate is provided with a stepped groove; a plurality of pressing needles with the same length are arranged on the pressing needle mounting plate, part of the pressing needles are arranged in the stepped groove, the rest of the pressing needles are arranged outside the stepped groove, and a height difference exists between the inner pressing needle and the outer pressing needle in the stepped groove. When the pressure heads are replaced or assembled, different lengths of the pressure heads do not need to be distinguished, and when the welding strip pressing tool is pressed on the welding strip, due to the fact that the lengths of the upper end portions and the lower end portions of the inner pressing needles and the outer pressing needles of the stepped grooves are different, height difference is formed, and different acting force on different positions of the welding strip can be formed.

Description

Technical Field

[0001] This utility model relates to the field of battery string welding equipment, and in particular to a pressure welding strip tooling. Background Technology

[0002] In the production of photovoltaic modules, solder ribbons need to be welded onto the solar cells to form a battery string. If the solder ribbon is not close to the main grid lines of the solar cell during welding, it will result in a poor solder joint. To ensure the solder ribbon is close to the main grid lines during welding, it needs to be pressed firmly.

[0003] When the welding strip enters the clamping area from the previous process, because the welding strip is thin and long, the welding strip clamping fixture can easily deform the welding strip at the transition section, which may even cause the welding strip to break in severe cases. Currently, the following methods are commonly used to address this problem:

[0004] 1. By setting pressure pins of different lengths, the bottom of the pressure pin at the transition section is higher than that of ordinary pressure pins. This can both tighten the welding strip and reduce the downward pressure length of the welding strip at the transition section.

[0005] Second, by setting springs with different elastic coefficients on the pressure needles, for example, the springs used for pressure needles in transition sections have smaller elastic coefficients, while the springs used for pressure needles in other sections have relatively larger elastic coefficients. In this way, when the welding strip tooling comes into contact with the welding strip, there will be a difference in the magnitude of the force acting on the welding strip, so as to protect the welding strip.

[0006] However, the above method has at least the following problems: when assembling or replacing the pressure needle, the assembly personnel need to identify and distinguish pressure needles of different lengths or springs of different elastic coefficients in order to install parts of different specifications in different positions. This increases the workload of the staff, and the process of distinguishing parts is more troublesome, resulting in low efficiency in assembling and replacing pressure needles.

[0007] Therefore, this application aims to provide a pressure welding strip tooling to solve the technical problems in the prior art. Utility Model Content

[0008] To reduce the workload of workers in identifying parts, improve the convenience of assembling and replacing pressure pins, and increase the working efficiency of pressure welding strips, this application provides a tooling for pressure welding strips.

[0009] The pressure welding strip tooling provided in this application adopts the following technical solution:

[0010] A pressure welding strip tooling includes a pressure needle mounting plate, wherein the pressure needle mounting plate is provided with a stepped groove;

[0011] Several pressure needles of the same length are arranged on the pressure needle mounting plate. Some pressure needles are arranged in the stepped groove, and the rest are arranged outside the stepped groove. There is a height difference between the pressure needles inside and outside the stepped groove.

[0012] Optionally, the upper end of the pressure needle located outside the stepped groove is higher than the upper end of the pressure needle located inside the stepped groove, and the lower end of the pressure needle located outside the stepped groove is lower than the lower end of the pressure needle located inside the stepped groove.

[0013] Optionally, at least one row of pressure pins is arranged outside the stepped groove along the length direction of the pressure pin mounting plate.

[0014] Optionally, a row of pressure pins is disposed on each side of the pressure pin mounting plate along the length direction outside the stepped groove.

[0015] Optionally, the pressure needle mounting plate has a plurality of observation slots, and the plurality of observation slots penetrate the pressure needle mounting plate.

[0016] Optionally, the pressure needle includes a pressure needle body and a pressure head, the pressure head being detachably connected to the pressure needle body, the pressure head being located below the pressure needle body, the pressure needle body being mounted on the pressure needle mounting plate, and the pressure head being located at the bottom of the pressure needle mounting plate.

[0017] Optionally, the pressure head is cylindrical, and its bottom surface includes a flat portion and a grooved portion. The flat portion is annular, and the grooved portion is concave inward along the flat portion, forming a conical hollow shape. The inward concavity of the pressure head's bottom surface creates a conical hollow structure, resulting in a circular contact surface between the pressure head and the welding strip. This method of contact with the bottom plane of the pressure head ensures more even force distribution when pressing the welding strip.

[0018] Optionally, the pressure needle mounting plate includes a mounting part and a support part. The mounting part is used to mount the pressure needle, and the support part is used to support it on the transmission line. The support part is located on both sides of the short side of the pressure needle mounting plate, and the mounting part is located between the two support parts. The bottom of the support part is provided with several rubber pads.

[0019] Optionally, a magnet is also provided at the bottom of the support. The magnet has a certain magnetic force, which enables the pressure pin mounting plate to be stably supported on the equipment used to place the solder strip.

[0020] Optionally, the pressure head is detachably connected to the pressure needle body.

[0021] Optionally, the pressure needle further includes a washer and a pressure spring. The pressure spring is sleeved on the outside of the pressure needle body. One end of the pressure spring abuts against the pressure needle mounting plate, and the other end of the pressure spring abuts against the pressure head. The pressure needle body passes through the washer and the pressure needle mounting plate in sequence and is then connected to the pressure head.

[0022] According to a specific embodiment and preferred aspect of this application, the pressure head and the pressure needle body are slidably connected after installation. One end of the pressure spring is connected to the pressure needle mounting plate, and the other end of the pressure spring is connected to the pressure head. In this application, several pressure springs have the same elastic coefficient. By means of the height difference of the pressure needle mounting plate itself and in combination with the pressure spring, the force of the pressure head acting on the welding strip is adjusted adaptively.

[0023] In summary, this application has the following advantages compared with the prior art:

[0024] By setting a stepped groove, some pressure pins are located inside the stepped groove and some are located outside the stepped groove, creating a height difference between the pressure pins inside and outside the stepped groove acting on the welding strip. Using pressure pins of the same length and springs with the same elastic coefficient on the welding strip fixture eliminates the need for workers to distinguish between different pressure pin lengths or springs with different elastic coefficients when assembling the welding strip fixture and replacing corresponding parts. This improves the convenience of assembly and replacement of pressure pins and increases the work efficiency of the welding strip process. Furthermore, by setting pressure pins installed outside the stepped groove on both sides of the pressure pin mounting plate along its length, the two sides of the pressure pin mounting plate are symmetrical, further eliminating the need to distinguish between the two sides of the welding strip fixture; the welding strip fixture can be placed directly, further improving convenience. Attached Figure Description

[0025] Figure 1 This is a perspective view of a pressure welding strip tooling provided in this application;

[0026] Figure 2 This is a cross-sectional view of a pressure welding strip tooling provided in this application;

[0027] Figure 3 This is a schematic diagram of the pressure needle in this application;

[0028] Figure 4 This is a perspective view of a pressure welding strip tool provided in this application from another angle.

[0029] Explanation of reference numerals in the attached drawings: 1. Pressure needle mounting plate; 2. Stepped groove; 3. Compression spring; 4. Observation groove; 5. Pressure needle body; 6. Pressure head; 61. Flat part; 62. Groove part; 7. Mounting part; 8. Support part; 9. Rubber pad; 10. Magnet; 11. Gasket. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present utility model. Therefore, the present utility model is not limited to the specific embodiments disclosed below.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In utility models, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0037] Reference Figure 1 The pressure welding strip fixture includes a pressure pin mounting plate 1, which has a rectangular cross-section. The pressure pin mounting plate 1 includes a mounting part 7 and a support part 8. The mounting part 7 is provided with several pressure pins of the same length, which are arranged in a rectangular array on the mounting part 7. The support part 8 is used to support the welding strip at the welding strip pressing station. The support parts 8 are located on both sides of the short side of the pressure pin mounting plate 1, and the mounting part 7 is located between the two support parts 8. The mounting part 7 is provided with several observation slots 4 that penetrate the pressure pin mounting plate 1. The observation slots 4 allow the staff to easily check the condition of the welding strip.

[0038] Reference Figure 1 and Figure 2The mounting part 7 is provided with a stepped groove 2, in which some pressure pins are located inside the stepped groove 2 and some pressure pins are located outside the stepped groove 2. The pressure pins inside and outside the stepped groove 2 have a height difference, so that when the pressure pins on the pressure pin mounting plate 1 act on the welding strip, a height difference is formed. To eliminate the need for workers to distinguish between different pressure pin lengths and springs 3 with different elastic coefficients when assembling welding strip tooling and replacing corresponding parts, all pressure pins in this application are identical. Through the setting of the stepped groove 2, in the initial state, the height of the pressure pins located in the stepped groove 2 is lower than the height of the pressure pins located outside the stepped groove 2. Specifically, the upper end of the pressure pin located outside the stepped groove 2 is higher than the upper end of the pressure pin located inside the stepped groove 2, and the lower end of the pressure pin located outside the stepped groove 2 is lower than the lower end of the pressure pin located inside the stepped groove 2. That is, the pressure pins located outside the stepped groove 2 are short pressure pins, and the pressure pins located inside the stepped groove 2 are long pressure pins. The embodiments of this application can adjust the height difference between long and short pressure pins by setting stepped grooves 2 of different heights, further improving convenience.

[0039] Since the welding strip is slightly tilted when it enters the pressing part from the previous process, the technical solution of this application has at least one row of pressing pins arranged outside the stepped groove 2 along the length direction of the pressing pin mounting plate 1 to form short pressing pins, so that the lower end of the pressing pin at the transition part is higher than the lower end of the long pressing pin. On the one hand, it can press the welding strip, and on the other hand, it can reduce the pressing length of the welding strip at the transition part, so as to avoid deforming or breaking the welding strip.

[0040] As a preferred technical solution of this application, the pressure pins on both sides of the pressure pin mounting plate 1 along the length direction are all located outside the stepped groove 2 to form short pressure pins, so that the upper and lower ends of the pressure pins on both sides of the pressure pin mounting plate 1 along the length direction are the same length. Therefore, there is no need to distinguish the direction of the two sides of the welding strip tooling, and the function of welding strip can be directly placed to complete the welding strip function, which further improves the working efficiency of welding strip and simplifies the work process.

[0041] Reference Figure 2 and Figure 3The pressure needle includes a pressure needle body 5, a pressure head 6, a washer 11, and a pressure spring 3. The pressure spring 3 is sleeved on the outside of the pressure needle body 5. The pressure needle mounting plate 1 has a mounting hole for mounting the pressure needle body 5. One end of the pressure spring 3 is used to abut against the inner wall of the mounting hole in the pressure needle mounting plate 1, and the other end of the pressure spring 3 is used to abut against the pressure head 6. The washer 11 is located on the pressure needle mounting plate 1. The pressure needle body 5 passes through the washer 11 and the pressure needle mounting plate 1 in sequence and is detachably connected to the pressure head 6. In this application, the elastic coefficient of each pressure spring 3 is the same. The pressure head 6 is cylindrical, and its bottom surface includes a flat portion 61 and a groove portion 62. Specifically, the groove portion 62 is recessed inward along the flat portion 61 to form a conical hollow shape, making the flat portion 61 annular. During the welding process, the contact surface between the pressure head 6 and the welding strip is the annular flat portion 61, thereby reducing the force-bearing area of ​​the welding strip. Compared with the prior art where the entire bottom of the pressure head is flat, the technical solution of this application makes the force on the welding strip more uniform during pressing.

[0042] Reference Figure 4 Magnets 10 and rubber pads 9 are provided at the bottom of the support part 8. The purpose is to increase the stability of the pressure needle mounting plate 1 when it is placed in the welding strip pressing station, so that the pressure needle mounting plate 1 is not easy to shift.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tooling for pressure welding strips, characterized in that, include A pressure needle mounting plate, wherein the pressure needle mounting plate is provided with a stepped groove; Several pressure needles of the same length are arranged on the pressure needle mounting plate. Some pressure needles are arranged in the stepped groove, and the rest are arranged outside the stepped groove. There is a height difference between the pressure needles inside and outside the stepped groove.

2. The pressure welding strip tooling according to claim 1, characterized in that: The upper end of the pressure needle located outside the stepped groove is higher than the upper end of the pressure needle located inside the stepped groove, and the lower end of the pressure needle located outside the stepped groove is lower than the lower end of the pressure needle located inside the stepped groove.

3. The pressure welding strip tooling according to claim 1, characterized in that: At least one row of pressure pins is arranged outside the stepped groove along the length of the pressure pin mounting plate.

4. The pressure welding strip tooling according to claim 3, characterized in that: A row of pressure pins is provided on each side of the pressure pin mounting plate along its length, outside the stepped groove.

5. The pressure welding strip tooling according to claim 1, characterized in that: The pressure needle mounting plate has several observation slots, and the observation slots penetrate the pressure needle mounting plate.

6. The pressure welding strip tooling according to claim 1, characterized in that: The pressure needle includes a pressure needle body and a pressure head. The pressure head is detachably connected to the pressure needle body. The pressure head is located below the pressure needle body. The pressure needle body passes through the pressure needle mounting plate, and the pressure head is located at the bottom of the pressure needle mounting plate.

7. The pressure welding strip tooling according to claim 6, characterized in that: The pressure head is cylindrical, and the bottom surface of the pressure head includes a flat part and a groove part. The flat part is annular, and the groove part is concave inward along the flat part to form a hollow cone.

8. The pressure welding strip tooling according to claim 1, characterized in that: The pressure needle mounting plate includes a mounting part and a support part. The mounting part is used to mount the pressure needle, and the support part is used to support it on the transmission line. The support part is located on both sides of the short side of the pressure needle mounting plate, and the mounting part is located between the two support parts. Several rubber pads are provided at the bottom of the support part.

9. The pressure welding strip tooling according to claim 8, characterized in that: A magnet is also provided at the bottom of the support.

10. The pressure welding strip tooling according to claim 6, characterized in that: The pressure needle also includes a washer and a pressure spring. The pressure spring is sleeved on the outside of the pressure needle body. One end of the pressure spring abuts against the pressure needle mounting plate, and the other end of the pressure spring abuts against the pressure head. The pressure needle body passes through the washer and the pressure needle mounting plate in sequence and then connects to the pressure head.

Images