Welding strip pressing tool of photovoltaic series welding machine

Abstract

The utility model discloses a photovoltaic series welding machine welding strip pressing tool, which belongs to the technical field of series welding machines and comprises a base, a light hole is arranged in the center of the base, a plurality of sliding rails are arranged in the light hole in parallel, sliding grooves are arranged in the sliding rails, and a plurality of pressing needles are movably connected in the sliding grooves. The pressing needles can slide on the sliding rail and can be fixed at any position on the sliding rail, the welding and pressing requirements of battery pieces with different sizes can be met by adjusting the number of the pressing needles and the positions of the pressing needles, and the production cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of series welding machine, especially relates to a photovoltaic series welding machine solder strip pressure tool. BACKGROUND

[0002] In the production process of photovoltaic cell piece, the series welding machine is the key equipment for welding a plurality of cell pieces into a cell string through solder strips. In the welding process, the solder strip needs to be stably pressed on the electrode of the cell piece to ensure the welding quality. However, the existing series welding machine solder strip pressure tool has some deficiencies: the traditional series welding machine solder strip pressure tool is uneven in the pressing force on the solder strip, which can easily cause the solder strip to deviate or be falsely welded during welding, thereby affecting the electrical performance and reliability of the cell string. Moreover, the pressing needle position in some solder strip pressure tools is fixed, and it is difficult to adapt to cell pieces of different sizes. If the solder strip pressure tool needs to be replaced as a whole to adapt to cell pieces of different sizes, the production cost is increased.

[0003] Therefore, a photovoltaic series welding machine solder strip pressure tool is provided. SUMMARY

[0004] To solve the above technical problems, the utility model provides a photovoltaic series welding machine solder strip pressure tool.

[0005] To achieve the above purpose, the utility model provides a photovoltaic series welding machine solder strip pressure tool, which comprises a base, a light transmission hole is formed in the center of the base, a plurality of sliding rails are arranged side by side in the light transmission hole, a sliding groove is formed in the sliding rail, and a plurality of pressing needles are movably connected in the sliding groove.

[0006] Preferably, the pressing needle comprises an inner column and an outer cylinder, an inner cavity is formed in the bottom of the outer cylinder, a necking portion is formed in the top of the outer cylinder, the inner diameter of the necking portion is smaller than the inner diameter of the inner cavity, the necking portion is connected to the inner cavity, the inner column is slidably connected to the inner cavity, a connecting column is fixedly connected to the top of the inner column, a baffle is fixedly connected to the connecting column through the necking portion, and a spring is arranged outside the part of the connecting column located in the inner cavity.

[0007] Preferably, a clamping groove is formed below the sliding groove, the size of the clamping groove is larger than the size of the sliding groove, a clamping ring protrudes outward from the side of the bottom of the outer cylinder, the clamping ring is clamped in the clamping groove, the outer cylinder penetrates through the sliding groove, and a fastening nut is threadedly connected to the outside of the top of the outer cylinder.

[0008] Preferably, a plurality of guide grooves are formed in the side wall of the inner cavity in the axial direction, a guide strip protrudes from the outer wall of the inner column corresponding to the guide grooves, and the guide strip is slidably connected to the guide grooves.

[0009] Preferably, the bottom surface of the pressing needle located at both ends of the solder strip conveying direction is higher than the bottom surface of the pressing needle in the middle part.

[0010] Preferably, the top of the snap ring abuts a plurality of spacers, and the top of the plurality of spacers abuts the snap groove.

[0011] Preferably, the bottom of the inner column is fixedly connected with a silica gel soft pad.

[0012] Preferably, the bottom of the silica gel soft pad is wavy.

[0013] Compared with the prior art, the welding strip pressing tool structure has the following advantages and technical effects:

[0014] The light transmission hole is arranged at the center of the base, the sliding groove is arranged on the slide rail, the inside of the tool is hollow, the welding strip is heated more evenly, and the welding quality is better; the pressing needle can slide on the slide rail and be fixed at any position on the slide rail, the number and position of the pressing needle can be adjusted, the welding and pressing requirements of battery pieces with different sizes can be met, and production cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated herein in their entirety. The embodiments illustrated in the drawings are utilized to explain and describe this application and are not intended to be an improper definition of the present application. In the drawings:

[0016] Figure 1 It is a schematic view of the welding strip pressing tool structure of the photovoltaic string welding machine of the utility model;

[0017] Figure 2 It is a schematic view of the welding strip pressing tool structure of the photovoltaic string welding machine of the utility model; Figure 1 It is a sectional view of B-B;

[0018] Figure 3 It is a bottom view of the slide rail in the welding strip pressing tool structure of the photovoltaic string welding machine of the utility model;

[0019] Figure 4 It is a schematic view of the welding strip pressing tool structure of the photovoltaic string welding machine of the utility model; Figure 2 It is an enlarged view of A;

[0020] In the figure: 1, base; 2, light transmission hole; 3, slide rail; 4, sliding groove; 6, snap groove; 7, fastening nut; 8, spacer; 9, silica gel soft pad; 5, pressing needle; 501, inner column; 502, outer cylinder; 503, inner cavity; 504, closing; 505, connecting column; 506, baffle; 507, spring; 508, snap ring; 509, guide groove; 510, guide strip. DETAILED DESCRIPTION

[0021] 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.

[0022] Photovoltaic string welding machine: A device used in the production of solar photovoltaic cells to weld multiple cells into a string using welding strips. It enables automated welding, improves production efficiency and welding quality, and is one of the key pieces of equipment in a photovoltaic module production line.

[0023] Welding strip clamping fixture: A device used in a string welding machine to clamp the welding strip to ensure that the welding strip is in stable contact with the cell electrode during the welding process, thereby ensuring welding quality.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Reference Figures 1 to 4 As shown, this embodiment provides a photovoltaic string welding machine welding strip pressing fixture, including: a base 1, a light-transmitting hole 2 opened in the center of the base 1, a plurality of slide rails 3 arranged in parallel in the light-transmitting hole 2, a slide groove 4 opened in the slide rail 3, and a plurality of pressing pins 5 movably connected in the slide groove 4.

[0026] A light-transmitting hole 2 is opened in the center of the base 1, and a sliding groove 4 is also opened on the slide rail 3. The tooling is hollowed out, so that the welding strip is heated more evenly and the welding quality is better. The pressure pin 5 can slide on the slide rail 3 and be fixed at any position on the slide rail 3. By adjusting the number and position of the pressure pin 5, it can adapt to the welding and pressing needs of battery cells of different sizes, saving production costs.

[0027] The design is further optimized. The pressure needle 5 includes an inner column 501 and an outer cylinder 502. The bottom of the outer cylinder 502 has an inner cavity 503 and the top of the outer cylinder 502 has a constriction 504. The inner diameter of the constriction 504 is smaller than the inner diameter of the inner cavity 503. The constriction 504 is connected to the inner cavity 503. The inner column 501 is slidably connected to the inner cavity 503. A connecting column 505 is fixedly connected to the top of the inner column 501. A baffle 506 is fixedly connected to the connecting column 505 through the constriction 504. A spring 507 is sleeved on the outer side of the part of the connecting column 505 located in the inner cavity 503.

[0028] The inner column 501 slides in the inner cavity 503 of the outer cylinder 502. The top of the inner column 501 is stopped by the contact between the baffle 506 and the closing end 504. The spring 507 can buffer the impact force of the clamping fixture during the clamping process and make the clamping force more uniform.

[0029] The design is further optimized by providing a slot 6 below the slide 4, with the slot 6 being larger than the slide 4. A retaining ring 508 protrudes outward from the bottom side of the outer cylinder 502 and engages with the slot 6. The top of the outer cylinder 502 passes through the slide 4, and a fastening nut 7 is threadedly connected to the outer side of the top of the outer cylinder 502.

[0030] When installing the pressure needle 5, pass the pressure needle 5 through the slide groove 4 from the bottom of the slide rail 3 until the retaining ring 508 is engaged in the retaining groove 6. The retaining groove 6 limits the position of the pressure needle 5. Then, tighten the pressure needle 5 at the top of the slide rail 3 by tightening the fastening nut 7. With the fastening nut 7 loose, the pressure needle 5 can slide along the slide groove 4, which facilitates the alignment adjustment of the pressure needle 5 and the welding strip. After the alignment is in place, tightening the fastening nut 7 will fix the position of the pressure needle 5.

[0031] In a further optimized design, a number of guide grooves 509 are provided on the side wall of the inner cavity 503 along the axial direction, and a guide strip 510 protrudes from the outer wall of the inner column 501 corresponding to the guide groove 509. The guide strip 510 is slidably connected to the guide groove 509.

[0032] The guide groove 509 and guide bar 510 can restrict the sliding of the inner column 501 in the inner cavity 503, prevent the inner column 501 from rotating, and thus avoid the friction between the inner column 501 and the welding strip caused by the rotation of the inner column 501.

[0033] The design is further optimized so that the bottom surface of the pressure pins 5 at both ends of the welding strip conveying direction is higher than the bottom surface of the pressure pins 5 in the middle.

[0034] When laying the welding strip, the first end of the welding strip is pulled by the clamp of the welding strip traction mechanism, and the last end is held by the tail clamp. When the first end is pulled, it is lifted up, and its position is higher than that of the last end, so the welding strip as a whole is inclined upward. In order to avoid the welding strip being in a high position and still held by the clamp, which would cause the welding strip to be deformed and curled up after the welding strip is pressed with the welding strip clamping fixture and then the clamp is released, thus affecting subsequent welding, the pressure pins 5 at both ends of the welding strip conveying direction are installed higher than the pressure pin 5 in the middle.

[0035] In a further optimized design, the top of the retaining ring 508 abuts against several gaskets 8, and the tops of the gaskets 8 abut against the retaining groove 6.

[0036] The gasket 8 can be used as part of the retaining ring 508 to increase the height of the retaining ring 508. The height of the bottom of the pressure needle 5 can be adjusted by adjusting the number of gaskets 8.

[0037] The design has been further optimized, with a silicone pad 9 fixed to the bottom of the inner column 501.

[0038] The silicone pad 9 can buffer the pressure during pressing, avoiding indentations and scratches, and can evenly distribute the pressure when attaching the battery cells.

[0039] The design has been further optimized, with the bottom of the silicone pad 9 featuring a wavy shape.

[0040] The wavy silicone pad 9 has greater friction than the conventional flat type, which can prevent the solder strip from slipping, provide better cushioning, and better fit battery cells of different shapes, such as those with a certain curvature. It can also better distribute pressure during bonding, making the pressure more uniform.

[0041] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0042] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0043] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A welding strip clamping fixture for a photovoltaic string welding machine, characterized in that, include: A base (1) has a light-transmitting hole (2) in the center of the base (1), and several slide rails (3) are arranged in parallel in the light-transmitting hole (2). A slide groove (4) is provided in the slide rail (3), and several pressure pins (5) are movably connected in the slide groove (4). The pressure needle (5) includes an inner column (501) and an outer cylinder (502). The bottom of the outer cylinder (502) is provided with an inner cavity (503), and the top of the outer cylinder (502) is provided with a constriction opening (504). The inner diameter of the constriction opening (504) is smaller than the inner diameter of the inner cavity (503). The constriction opening (504) communicates with the inner cavity (503). The inner column (501) is slidably connected in the inner cavity (503). A connecting column (505) is fixedly connected to the top of the inner column (501). A baffle (506) is fixedly connected to the connecting column (505) through the constriction opening (504). A spring (507) is sleeved on the outer side of the part of the connecting column (505) located in the inner cavity (503).

2. The photovoltaic string welding machine strip clamping fixture according to claim 1, characterized in that: A slot (6) is provided below the slide groove (4), and the size of the slot (6) is larger than the size of the slide groove (4); a retaining ring (508) protrudes outward from the bottom side of the outer cylinder (502), and the retaining ring (508) is engaged in the slot (6); the top of the outer cylinder (502) passes through the slide groove (4), and a fastening nut (7) is threadedly connected to the outer side of the top of the outer cylinder (502).

3. The photovoltaic string welding machine strip clamping fixture according to claim 1, characterized in that: The inner cavity (503) has a plurality of guide grooves (509) axially formed on its side wall. The outer wall of the inner column (501) has a guide strip (510) protruding from the guide groove (509). The guide strip (510) is slidably connected to the guide groove (509).

4. The photovoltaic string welding machine strip clamping fixture according to claim 2, characterized in that: The bottom surface of the pressure needle (5) located at both ends of the welding strip conveying direction is higher than the bottom surface of the pressure needle (5) in the middle.

5. The photovoltaic string welding machine strip clamping fixture according to claim 2, characterized in that: The top of the retaining ring (508) abuts against a plurality of gaskets (8), and the tops of the plurality of gaskets (8) abut against the retaining groove (6).

6. The photovoltaic string welding machine strip clamping fixture according to claim 1, characterized in that: A silicone pad (9) is fixed to the bottom of the inner column (501).

7. The photovoltaic string welding machine strip clamping fixture according to claim 6, characterized in that: The bottom of the silicone pad (9) is wavy.

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