Coating equipment for battery piece protection glue

Abstract

The utility model relates to the technical field of solar cells, in particular to coating equipment for cell protection glue, and aims to solve the problem that the existing coating equipment is low in efficiency. In order to achieve the purpose, the coating equipment for the battery piece protection glue comprises a transmission device and a gluing device, and the transmission device is used for transmitting a battery piece; the gluing device comprises a first roller, and the first roller is located above the conveying device; and when the battery piece passes through the lower part of the first roller, the gap between the battery piece and the first roller is 0.01-0.05 mm. And the protective glue attached to the roller surface of the first roller can be coated on the upper surface of the battery piece, so that the protective glue with proper thickness is attached to the surface of the battery piece. Meanwhile, due to the fact that the gap exists between the battery piece and the first roller and the gap is filled with the protective glue, the glue layer on the surface of the first roller only deforms slightly, the situation that the first roller exerts large pressure on the battery piece is avoided, and the piece breaking rate of the battery piece in the coating process is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of solar cell, specifically provide a kind of coating equipment of battery piece protective glue. BACKGROUND

[0002] In the process of battery piece production and photovoltaic module manufacturing, battery piece is usually stacked, in order to reduce the possibility of scratching battery piece, one hand increases isolation pad paper between battery piece to isolate adjacent battery piece, the other hand, battery piece surface is coated with protective glue to protect battery piece.

[0003] In known technology, the efficiency of coating / printing protective layer on the surface of battery piece is low.

[0004] Therefore, there is an urgent need for a kind of coating equipment of battery piece protective glue to solve the problem of low efficiency of existing coating equipment. INVENTION CONTENTS

[0005] The utility model aims at solving the above-mentioned technical problem, i.e.

[0006] In the first aspect, the utility model provides a kind of coating equipment of battery piece protective glue, comprising: transmission device, for transmitting battery piece;Glue coating device, including first roller, the first roller is located above the transmission device;When the battery piece passes below the first roller, the gap between the battery piece and the first roller is 0.01mm to 0.05mm.

[0007] In the above-mentioned specific embodiment of coating equipment of battery piece protective glue, the glue coating device further includes glue box and third roller, which are all located above the transmission device, part of the third roller is immersed in the glue box, and the third roller and the first roller are in rolling contact.

[0008] In the above-mentioned specific embodiment of coating equipment of battery piece protective glue, the glue coating device further includes glue box, second roller and third roller, which are all located above the transmission device, part of the third roller is immersed in the glue box, and the third roller, the second roller and the first roller are in rolling contact in turn.

[0009] In the above-mentioned specific embodiment of coating equipment of battery piece protective glue, the gap between the first roller and the second roller is 0.25mm to 0.6mm.

[0010] In the above-mentioned specific embodiment of coating equipment of battery piece protective glue, the gap between the second roller and the third roller is 0.25mm to 0.6mm.

[0011] In the specific embodiment of the coating equipment for the battery piece protective glue, the diameter of the first roller is 130mm to 170mm, the diameter of the second roller is 90mm to 130mm, and the diameter of the third roller is 120mm to 200mm.

[0012] In the specific embodiment of the coating equipment for the battery piece protective glue, the ratio of the rotating speeds of the first roller, the second roller and the third roller is (0.9-1.1):(0.2-0.5):(1.3-2.0).

[0013] In the specific embodiment of the coating equipment for the battery piece protective glue, the glue coating device further comprises a scraper, the scraper is in contact with the second roller, and the contact point of the scraper with the second roller is located behind the contact point of the second roller with the first roller along the rolling direction of the second roller.

[0014] In the specific embodiment of the coating equipment for the battery piece protective glue, the scraper is located above the glue box or the third roller.

[0015] In the specific embodiment of the coating equipment for the battery piece protective glue, the glue coating device further comprises a supporting roller, the supporting roller is located below the transmission device and the first roller and is configured to support the battery piece on the transmission device.

[0016] In the specific embodiment of the coating equipment for the battery piece protective glue, the surface of the first roller is provided with a concave grid pattern.

[0017] In the specific embodiment of the coating equipment for the battery piece protective glue, the linear speed of the surface of the first roller is 1m / min to 8m / min.

[0018] Compared with the prior art, the coating equipment for the battery piece protective glue has the following beneficial effects:

[0019] The coating equipment for the battery piece protective glue comprises a transmission device and a glue coating device, the transmission device is used for transmitting the battery piece, the glue coating device comprises a first roller, the first roller is located above the transmission device, and the gap between the battery piece and the first roller is 0.01mm to 0.05mm when the battery piece passes below the first roller. The protective glue attached to the surface of the first roller can be coated on the upper surface of the battery piece, so that the protective glue with a proper thickness is attached to the surface of the battery piece. Meanwhile, since the gap exists between the battery piece and the first roller and the gap is filled with the protective glue, the glue layer on the surface of the first roller only has slight deformation, so that the first roller does not exert a large pressure on the battery piece, and the breakage rate of the battery piece in the coating process is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] The preferred embodiments of the utility model are described below in combination with the drawings, and the drawings show:

[0021] Figure 1 is a schematic view of a coating device of the battery piece protection glue provided by the utility model;

[0022] Figure 2a is an end surface schematic view of the net hole and the net wall of the first roller provided by the utility model;

[0023] Figure 2b is a plane schematic view of the net hole and the net wall of the first roller provided by the utility model;

[0024] Figure 3a is an end surface schematic view of the net hole and the net wall of another first roller provided by the utility model;

[0025] Figure 3b is a plane schematic view of the net hole and the net wall of another first roller provided by the utility model;

[0026] Figure 4a is an end surface schematic view of the net hole and the net wall of still another first roller provided by the utility model;

[0027] Figure 4b is a plane schematic view of the net hole and the net wall of still another first roller provided by the utility model;

[0028] Figure 5 is another schematic view of the coating device of the battery piece protection glue provided by the utility model;

[0029] Figure 6 is still another schematic view of the coating device of the battery piece protection glue provided by the utility model.

[0030] Explanation of reference signs:

[0031] 1, conveying belt; 2, battery piece; 3, first roller; 31, net hole; 32, net wall; 4, supporting roller; 5, second roller; 6, third roller; 7, glue box; 8, scraper. DETAILED DESCRIPTION

[0032] The preferred embodiments of the utility model will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used for explaining the technical principles of the utility model, and are not intended to limit the protection scope of the utility model.

[0033] It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In addition, it should be noted that in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In the known technology, the process of coating / printing a protective layer on the surface of the battery piece is as follows: the battery piece to be coated is grabbed, moved to the coating workbench and calibrated to the battery piece projection position, a specific coating screen is used to coat in single piece or multiple pieces at a time, and a protective glue layer is formed on one side of the battery piece. The battery piece after coating is moved to the transmission belt and sent to the drying equipment for drying. The above steps of coating protective glue on one side of the battery piece are more and the efficiency is lower.

[0036] Based on this, the utility model provides a kind of coating equipment of battery piece protective glue, including transmission device and glue coating device, transmission device is used to transmit battery piece;Glue coating device includes first roller, first roller is located above transmission device;When battery piece passes below first roller, the gap between battery piece and first roller is 0.01mm to 0.05mm.

[0037] The coating equipment of battery piece protective glue of some embodiments of the present disclosure will be described below through several specific embodiments.

[0038] Example one

[0039] Figure 1 It is a kind of schematic diagram of the coating equipment of battery piece protective glue provided by the utility model.

[0040] As Figure 1 Indicated, the coating equipment of battery piece protective glue provided by the utility model includes transmission device and glue coating device, transmission device is used to transmit battery piece 2, and glue coating device is used to coat protective glue to the single side of battery piece 2.

[0041] In the specific embodiment of the present disclosure, the conveying device is a conveying belt 1 and the accompanying conveying rollers, power rollers, etc. In the drawings of the present disclosure, only the conveying belt 1 is shown, and the rest of the structure is not shown in the drawings. The battery pieces 2 are placed at equal intervals above the conveying belt 1, and pass through the glue coating device in a single direction under the conveying of the conveying belt 1 to coat the upper surface of the battery pieces 2 with protective glue. For example, the conveying belt 1 is conveyed at a speed V, and the interval between adjacent battery pieces 2 on the conveying belt 1 is L.

[0042] The glue coating device includes a first roller 3 located above the conveying device, specifically above the conveying belt 1 and the battery pieces 2. The surface of the first roller 3 is attached with protective glue, which can be coated on the surface of the battery pieces 2. The linear speed of the surface of the first roller 3 is consistent with the conveying speed of the conveying belt 1, ensuring that the first roller 3, the battery pieces 2 and the conveying belt 1 can be synchronized, for example, 1 m / min to 8 m / min.

[0043] The material of the first roller 3 is a rubber-coated steel roller, and the outer layer of the roller is wrapped with a rubber layer having a Shore hardness of 50A to 58D. As shown in Figures 2a to 4b , the surface of the rubber layer of the first roller 3 has a concave grid pattern, wherein the concave grid pattern is composed of grid holes 31 and grid walls 32, and the ratio of the grid walls 32 to the grid holes 31 is about 1:5. For example, the shape of the grid holes 31 can be triangular patterns (as shown in Figure 2a and Figure 2b ), rhombuses (as shown in Figure 3a and Figure 3b ), or hexagons (as shown in Figure 4a and Figure 4b ), with a depth of 20 μm to 50 μm. After the battery pieces 2 pass through the first roller 3 with the conveying belt 1, the pattern on the surface of the rubber layer of the first roller 3 can coat the battery pieces 2 with protective glue having a corresponding pattern.

[0044] In some examples, the diameter of the first roller 3 is D = n x (L / π), i.e. the circumference of the first roller 3 is nL, wherein n is an integer and L is the interval between adjacent battery pieces 2. For example, the diameter of the first roller 3 is between 130 mm and 170 mm.

[0045] In addition, when the battery pieces 2 pass through the first roller 3 with the conveying belt 1, the gap between the battery pieces 2 and the first roller 3 is 0.01 mm to 0.05 mm. By controlling the gap between the battery pieces 2 and the first roller 3 to be 0.01 mm to 0.05 mm, the protective glue with a suitable thickness can be attached to the surface of the battery pieces 2. For example, the thickness of the protective glue attached to the surface of the first roller 3 is 0.02 mm to 0.07 mm, and the thickness of the protective glue attached to the surface of the battery pieces 2 is 0.01 mm to 0.04 mm.

[0046] It needs to be particularly pointed out that, during the process that the battery piece 2 passes below the first roller 3 along with the conveying belt 1, since there is a gap between the battery piece 2 and the first roller 3 and the gap is filled with the protective glue, only slight deformation of the glue layer on the surface of the first roller 3 occurs, so as to avoid that the first roller 3 exerts great pressure on the battery piece 2, thereby reducing the breakage rate of the battery piece 2 in the coating process.

[0047] In some examples, the glue coating device further comprises a supporting roller 4 located below the first roller 3 and the conveying device and configured to support the battery piece 2 on the conveying device, so as to avoid that the battery piece 2 sinks during the process that the first roller 3 coats the protective glue on the surface of the battery piece 2. Generally, the supporting roller 4 is a driven roller, the upper surface of the supporting roller 4 is in contact with the conveying belt 1, and the linear speed of the supporting roller 4 is the same as the conveying speed of the conveying belt 1 and the linear speed of the first roller 3.

[0048] Figure 5 is another schematic view of the battery piece protective glue coating equipment provided by the utility model.

[0049] In some examples, as shown in Figure 5 the glue coating device further comprises a glue box 7, a second roller 5 and a third roller 6, the glue box 7, the second roller 5 and the third roller 6 are all located above the conveying belt 1, and the first roller 3, the second roller 5 and the third roller 6 are in rolling contact in sequence. The glue box 7 contains the protective glue, and the protective glue can be added into the glue box 7 in a time-quantitative manner. A part of the third roller 6 is immersed in the glue box 7, for example, 1 / 3 of the lower part of the third roller 6 is immersed in the glue box 7. With the rotation of the third roller 6, the protective glue can be attached to the surface of the third roller 6, and then the protective glue is sequentially attached to the surfaces of the second roller 5 and the first roller 3 through the rolling contact of the third roller 6, the second roller 5 and the first roller 3, so as to improve the uniformity and thickness of the protective glue attached to the surface of the first roller 3.

[0050] It needs to be particularly pointed out that the first roller 3, the second roller 5 and the third roller 6 are in rolling contact in sequence, including the case that the adjacent rollers (for example, the first roller 3 and the second roller 5 or the second roller 5 and the third roller 6) roll due to the existence of the protective glue filling the gap between the two rollers.

[0051] The gap between the third roller 6 and the second roller 5 affects the thickness of the protective glue attached to the second roller 5, and the gap between the second roller 5 and the first roller 3 affects the thickness of the protective glue attached to the first roller 3. Once the gap between the second roller 5 and the first roller 3 and the gap between the third roller 6 and the second roller 5 are not set reasonably, the protective glue on the first roller 3 will be too thick or too thin, which affects the thickness of the protective glue attached to the battery piece 2. In the examples of the present disclosure, the gap between the first roller 3 and the second roller 5 is 0.25mm to 0.6mm, the gap between the second roller 5 and the third roller 6 is 0.25mm to 0.6mm, and the range is adjusted according to the viscosity of the protective glue.

[0052] The first roller 3, the second roller 5, and the third roller 6 rotate at the same linear velocity. The ratio of their rotational speeds (i.e., angular velocities) is (0.9–1.1):(0.2–0.5):(1.3–2.0), and the ratio of their diameters is the inverse of the ratio of their rotational speeds. For example, the diameter of the second roller 5 is 90 mm to 130 mm, and the diameter of the third roller 6 is 120 mm to 200 mm.

[0053] The first roller 3 is configured as the driving roller. The second roller 5 and the third roller 6 can both be selectively configured as driving rollers to reduce the possibility of slippage during the rotation of the first roller 3, the second roller 5 and the third roller 6, thereby improving the reliability of the transfer of protective adhesive from the third roller 6 to the surface of the first roller 3 via the second roller 5.

[0054] In some examples, such as Figure 5 As shown, the adhesive application device also includes a scraper 8, which contacts the second roller 5 to scrape off excess protective adhesive from the second roller 5. Specifically, along the rolling direction of the second roller 5, the contact point between the scraper 8 and the second roller 5 is located after the contact point between the second roller 5 and the first roller 3. Through the rolling contact between the second roller 5 and the first roller 3, a portion of the protective adhesive adhering to the second roller 5 is transferred to the surface of the first roller 3. The remaining protective adhesive is scraped off by the scraper 8. The second roller 5 then contacts the third roller 6 again to re-adhere to the protective adhesive and continues to transfer the protective adhesive to the first roller 3. The scraper 8's removal of the remaining protective adhesive from the second roller 5 prevents the residual adhesive from gradually accumulating on the second roller 5, reduces the possibility of the protective adhesive curing on the second roller 5, ensures proper contact between the second roller 5 and the first roller 3 and the third roller 6, and also facilitates maintaining the thickness of the protective adhesive transferred to the first roller 3.

[0055] In the example disclosed herein, the scraper 8 is positioned above the glue container 7, and the glue scraped off the second roller 5 by the scraper 8 can drip from the scraper 8 and flow back into the glue container 7. Of course, in other possible examples, the scraper 8 is positioned above the third roller 6, in which case the glue scraped off the second roller 5 by the scraper 8 can drip from the scraper 8 onto the third roller 6, and after rolling contact between the third roller 6 and the second roller 5, it can be evenly re-adhered to the second roller 5.

[0056] In addition to the coating equipment, a curing device is also provided after the coating equipment. The conveying device can send the coated battery cells 2 to the curing device, where the protective adhesive is cured. For example, the curing device uses a UV (Ultraviolet) oven for curing.

[0057] In summary, the working principle of the battery cell protective adhesive coating equipment provided by this utility model is as follows:

[0058] With the rotation of the third roller 6, the protective glue can be attached to the roller surface of the third roller 6, and by the rolling contact between the third roller 6 and the second roller 5, a part of the protective glue attached to the surface of the third roller 6 can be transferred to the roller surface of the second roller 5; and by the rolling contact between the second roller 5 and the first roller 3, the part of the protective glue attached to the roller surface of the second roller 5 can be transferred to the roller surface of the first roller 3. The residual protective glue attached to the roller surface of the second roller 5 can be scraped off by the scraper 8 and flow back to the glue box 7 for stirring and reuse. At the same time, scraping off the residual protective glue attached to the roller surface of the second roller 5 can also avoid the gradual accumulation of the residual protective glue on the second roller 5, reduce the possibility of solidification of the protective glue on the second roller 5, ensure the cooperation of the second roller 5 with the first roller 3 and the third roller 6, and facilitate the maintenance of the thickness of the protective glue transferred to the first roller 3. The gap between the first roller 3 and the second roller 5 is 0.25mm to 0.6mm, and the gap between the second roller 5 and the third roller 6 is 0.25mm to 0.6mm, so that the thickness of the protective glue attached to the roller surface of the first roller 3 is maintained within a certain range.

[0059] With the conveying of the battery piece 2 between the first roller 3 and the supporting roller 4 by the conveying belt 1, the protective glue attached to the roller surface of the first roller 3 can be coated on the upper surface of the battery piece 2, and after the protective glue is solidified, a protective layer is formed.

[0060] The gap between the battery piece 2 and the first roller 3 is 0.01mm to 0.05mm, so that the protective glue with appropriate thickness is attached to the surface of the battery piece 2. At the same time, since there is a gap between the battery piece 2 and the first roller 3 and the gap is filled with protective glue, the glue layer on the surface of the first roller 3 only deforms slightly, so that the first roller 3 does not exert a large pressure on the battery piece 2, thereby reducing the breakage rate of the battery piece 2 during coating.

[0061] Embodiment two

[0062] The coating equipment for the protective glue of the battery piece provided by the embodiment of the present disclosure has substantially the same structure as the coating equipment for the protective glue of the battery piece provided by the embodiment one, and the difference lies in that the structure of the glue coating device is different. The glue coating device in the coating equipment for the protective glue of the battery piece provided by the embodiment of the present disclosure comprises a first roller 3, a supporting roller 4, a glue box 7 and a third roller 6.

[0063] Figure 6 is another schematic view of the coating equipment for the protective glue of the battery piece provided by the present disclosure.

[0064] As Figure 6As shown, the first roller 3 is located above the conveying belt 1, and the supporting roller 4 is located below the conveying belt 1 and the first roller 3, configured to support the battery piece 2 on the conveying belt 1 to prevent the battery piece 2 from sinking during the process of the first roller 3 coating the surface of the battery piece 2 with protective glue. The glue box 7 and the third roller 6 are both located above the conveying belt 1, and the first roller 3 and the third roller 6 are in rolling contact. The glue box 7 contains protective glue, and the protective glue can be added to the glue box 7 in a timed and quantitative manner. A part of the third roller 6 is immersed in the glue box 7, for example, 1 / 3 of the lower part of the third roller 6 is immersed in the glue box 7. As the third roller 6 rotates, the protective glue can be attached to the surface of the third roller 6, and then the protective glue is attached to the surface of the first roller 3 through the rolling contact between the third roller 6 and the first roller 3.

[0065] The glue coating device can further include a scraper 8 in contact with the third roller 6 to scrape off the protective glue on the third roller 6. The scraper 8 is located above the glue box 7, and the protective glue scraped off by the scraper 8 can flow back into the glue box 7 for reuse.

[0066] So far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without deviating from the principles of the utility model, those skilled in the art can make equivalent changes or replacements to related technical features, and the technical schemes after these changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A coating apparatus for protective adhesive on battery cells, characterized in that, include: Transmission device for transporting battery cells; The adhesive application device includes a first roller, which is located above the conveying device; When the battery cell passes under the first roller, the gap between the battery cell and the first roller is 0.01 mm to 0.05 mm; The outer layer of the first roller is covered with an adhesive layer; the surface of the adhesive layer has a recessed grid pattern.

2. The coating equipment for protective adhesive on battery cells according to claim 1, characterized in that, The adhesive applicator also includes an adhesive box and a third roller, both located above the conveying device. A portion of the third roller is immersed in the adhesive box, and the third roller and the first roller are in rolling contact.

3. The coating equipment for protective adhesive on battery cells according to claim 1, characterized in that, The adhesive applicator also includes an adhesive box, a second roller, and a third roller, all located above the conveying device. A portion of the third roller is immersed in the adhesive box, and the third roller, the second roller, and the first roller roll in contact with each other in sequence.

4. The coating equipment for protective adhesive on battery cells according to claim 3, characterized in that, The gap between the first roller and the second roller is 0.25 mm to 0.6 mm.

5. The coating equipment for protective adhesive on battery cells according to claim 3, characterized in that, The gap between the second roller and the third roller is 0.25 mm to 0.6 mm.

6. The coating equipment for protective adhesive on battery cells according to claim 3, characterized in that, The diameter of the first roller is 130mm to 170mm, the diameter of the second roller is 90mm to 130mm, and the diameter of the third roller is 120mm to 200mm.

7. The coating equipment for protective adhesive on battery cells according to claim 3, characterized in that, The rotational speed ratio of the first roller, the second roller, and the third roller is (0.9~1.1):(0.2~0.5):(1.3~2.0).

8. The coating equipment for protective adhesive on battery cells according to claim 3, characterized in that, The adhesive applicator further includes a scraper that contacts the second roller. Along the rolling direction of the second roller, the contact point between the scraper and the second roller is located after the contact point between the second roller and the first roller.

9. The coating equipment for protective adhesive on battery cells according to claim 8, characterized in that, The scraper is located above the glue box or the third roller.

10. The coating equipment for protective adhesive on battery cells according to claim 1, characterized in that, The coating device also includes a support roller located below the conveying device and the first roller, configured to support the battery cells located on the conveying device.

11. The coating equipment for protective adhesive on battery cells according to claim 1, characterized in that, The first roller is made of rubber-coated steel; the Shore hardness of the rubber layer is 50A to 58D.

12. The coating equipment for protective adhesive on battery cells according to claim 1, characterized in that, The linear velocity of the surface of the first roller is 1 m / min to 8 m / min.

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