Glue applying mechanism and glue printing device

Abstract

The utility model relates to a glue applying mechanism and a glue printing device. The glue applying mechanism is used for applying glue to the battery string and comprises a glue outlet module, an air inlet module and a plurality of glue brushes, the interior of the glue outlet module is used for caching glue, the plurality of glue brushes are distributed on the glue outlet module at intervals and are all communicated with the interior of the glue outlet module, and the glue brushes are used for brushing the glue in the glue outlet module on a welding strip in the battery string and battery pieces around the welding strip; the air inlet module is communicated with the glue outlet module and is used for conveying air into the glue outlet module, so that glue in the glue outlet module flows to the glue brush under the action of air pressure. According to the scheme, the battery string is coated with the glue brush, a screen plate is not needed, and the problem of non-uniform glue application caused by deformation of the screen plate does not exist; glue flows to the glue brush under the action of air pressure input by the air inlet module, no extra mechanism such as a scraper is needed for stirring the glue, and bubbles are not prone to being generated. When the glue brush is used for coating the glue, the bristles of the glue brush can be expanded outwards, so that the welding strip and the battery piece can be covered in a larger range, and the position requirement on the battery piece is reduced.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a glue applying mechanism and a glue printing device. Background Art

[0002] In the photovoltaic industry, a battery string includes a battery cell and a welding ribbon welded to the battery cell. In order to increase the bonding strength between the welding ribbon and the battery cell, especially for a battery cell without a main grid, glue is usually used to bond the welding ribbon and the battery cell after the battery cell and the welding ribbon are welded to increase the bonding strength between the two.

[0003] The specific method of using glue to bond the solder strip and the battery cell is as follows: fill the glue into the stencil, use the scraper on the stencil to apply the glue, so that the glue drips from the opening of the stencil to the solder strip under the stencil and the battery cell near the solder strip, and then bond the solder strip and the battery cell after the glue solidifies.

[0004] However, in the above-mentioned method of screen printing glue, on the one hand, the scraper will cause the middle part of the screen to be concave and deformed, and the corresponding glue dots dripping on the middle of the battery cell will be more rounded and thick, while the glue dots at both ends of the battery cell will be thin, resulting in uneven distribution of glue on the battery cell, affecting the bonding strength between the battery cell and the solder strip; on the other hand, the scraper is prone to generate bubbles in the process of scraping glue, which also affects the bonding strength between the battery cell and the solder strip; in addition, the screen printing glue is difficult to apply. If the screen and the battery cell are not aligned according to the preset position, the glue dots will be offset and cannot cover the solder strip and the battery cell, and the bonding between the two cannot be achieved. Utility Model Content

[0005] Based on this, it is necessary to provide a glue applying mechanism and a glue printing device to address the problems of uneven glue distribution, easy generation of bubbles and high difficulty in applying glue when screen printing glue is used for battery strings.

[0006] A glue applying mechanism, used for applying glue to a battery string, wherein the battery string includes a battery cell and a welding strip arranged on the battery cell, and the glue applying mechanism includes:

[0007] A glue discharging module, wherein the interior of the glue discharging module is used for caching glue;

[0008] A plurality of glue brushes, which are spaced apart in the glue discharging module and are all connected to the inside of the glue discharging module, and are used to apply the glue in the glue discharging module to the soldering strip and the battery cell around the soldering strip;

[0009] An air intake module is connected to the glue discharging module, and is used to transmit gas to the glue discharging module so that the glue in the glue discharging module flows to the glue brush under the action of air pressure.

[0010] In one embodiment, the glue discharging module includes a glue discharging cylinder and a glue discharging pipe connected to the glue discharging cylinder, the glue is stored in the glue discharging cylinder, and the glue discharging pipe is connected to the glue brush at a side away from the glue discharging cylinder.

[0011] In one of the embodiments, the material of the rubber outlet hose is one of polytetrafluoroethylene, polyimide, and polyether ketone.

[0012] In one embodiment, the inner diameter of the rubber outlet hose ranges from 0.3 mm to 5 mm.

[0013] In one embodiment, the diameter of the bristles in the rubber brush ranges from 0.05 mm to 1 mm.

[0014] In one embodiment, the material of the bristles is one of polyethylene terephthalate and plant fiber.

[0015] In one embodiment, the number of the rubber brushes ranges from 5 to 40.

[0016] In one embodiment, the length of the rubber dispensing cylinder is in the range of 80 mm to 500 mm, and the diameter of the rubber dispensing cylinder is in the range of 10 mm to 200 mm.

[0017] In one embodiment, the glue application mechanism also includes a glue storage module, which includes a glue storage barrel and a glue delivery pipe connected to the glue storage barrel, and the glue delivery pipe is connected to the glue output module on the side away from the glue storage barrel, and the glue is stored in the glue storage barrel.

[0018] The above-mentioned glue application mechanism inputs air pressure to the glue output module by setting an air intake module, so that the glue in the glue output module flows to the glue brush under the action of air pressure, and the glue brush applies the glue to the solder strip and the battery cell around the solder strip to achieve the bonding of the solder strip and the battery cell. Compared with the traditional screen printing glue method, this proposal uses a glue brush to apply the battery string. On the one hand, there is no need to use a screen, and there is no problem of uneven glue application caused by screen deformation; on the other hand, the glue flows to the glue brush under the action of the air pressure input by the air intake module, and there is no additional mechanism such as a scraper to stir the glue, so it is not easy to generate bubbles; and when the glue brush applies glue, the bristles of the glue brush can expand outward, which can cover the solder strip and the battery cell in a larger range, reducing the position requirements for the battery cell, which is conducive to reducing the difficulty of glue application and facilitating the increase in production.

[0019] The present application also provides a glue printing device, which includes a transmission line, a glue application seat and a glue application mechanism as described in any of the above embodiments, wherein:

[0020] The transmission line is used to transmit the battery string and suspend the transmission every preset time;

[0021] The glue applying mechanism can be installed on the glue applying seat so as to be movably along the transmission direction of the transmission line, and the glue applying mechanism is located above the transmission line and can be raised and lowered toward the transmission line. The glue applying mechanism is used to apply the glue to the solder strip and the battery cells around the solder strip when the transmission is paused. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of the glue application mechanism provided by the present invention.

[0023] Figure 2 for Figure 1 Left view of the center glue dispensing module and the glue brush.

[0024] in:

[0025] 10. Glue application mechanism;

[0026] 100, glue discharging module; 110, glue discharging cylinder; 120, glue discharging tube;

[0027] 200, glue brush;

[0028] 300, air intake module;

[0029] 400, glue storage module; 410, glue storage barrel; 420, glue delivery hose. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0036] See also Figure 1 and Figure 2 As shown, Figure 1 FIG. 1 shows a schematic structural diagram of a glue application mechanism 10 in an embodiment of the present application. Figure 2 for Figure 1Left side view of the glue dispensing module 100 and the glue brush 200. The glue dispensing mechanism 10 provided in one embodiment of the present application is used to apply glue to a battery string, the battery string includes battery cells and welding strips disposed on the battery cells. It should be noted that the welding strips are generally fixed to the battery cells by welding.

[0037] The glue dispensing mechanism 10 of the present application includes a glue dispensing module 100, a glue brush 200 and an air intake module 300. The interior of the glue dispensing module 100 is used to buffer glue. There are multiple glue brushes 200, and the multiple glue brushes 200 are spaced apart in the glue dispensing module 100 and are all connected to the interior of the glue dispensing module 100. The air intake module 300 is connected to the glue dispensing module 100, and the air intake module 300 is used to transmit gas to the glue dispensing module 100, so that the glue in the glue dispensing module 100 flows to the glue brush 200 under the action of air pressure, and the glue brush 200 is used to apply the glue in the glue dispensing module 100 to the solder strip and the battery cells around the solder strip. In the specific setting, the glue is preferably a photosensitive curing glue (UV glue), and the UV glue can be cured under ultraviolet light to achieve bonding between the solder strip and the battery string.

[0038] In order to more conveniently realize that the air intake module 300 transmits gas to the glue discharging module 100, the air intake module 300 can be specifically configured as a cylinder, which outputs air pressure to the glue discharging module 100, or the air intake module 300 can be an air pump, which pumps external gas into the glue discharging module 100. However, the air intake module 300 is not limited to the above-mentioned air cylinder and air pump, and any structure that can transmit gas is available.

[0039] The above-mentioned glue applying mechanism 10, by setting the air inlet module 300 to input air pressure to the glue discharging module 100, makes the glue in the glue discharging module 100 flow to the glue brush 200 under the action of air pressure, and the glue brush 200 applies the glue to the solder strip and the battery cell around the solder strip to achieve the bonding of the solder strip and the battery cell. Compared with the traditional screen printing glue method, the present proposal uses the glue brush 200 to apply the battery string. On the one hand, there is no need to use a screen, and there is no problem of uneven glue application caused by screen deformation; on the other hand, the glue flows to the glue brush 200 under the action of the air pressure input by the air inlet module 300, and there is no additional mechanism such as a scraper to stir the glue, and it is not easy to generate bubbles; and when the glue brush 200 applies glue, the bristles of the glue brush 200 can expand outward, which can cover the solder strip and the battery cell in a larger range, reducing the position requirements for the battery cell, which is conducive to reducing the difficulty of glue application and facilitating the increase of production.

[0040] In order to make the structure of the glue discharging module 100 simple and convenient, in a preferred embodiment, the glue discharging module 100 includes a glue discharging cylinder 110 and a glue discharging pipe 120 connected to the glue discharging cylinder 110. Glue is stored in the glue discharging cylinder 110, and the side of the glue discharging pipe 120 facing away from the glue discharging cylinder 110 is connected to the glue brush 200. Through the above arrangement, the glue in the glue discharging cylinder 110 flows to the glue brush 200 through the glue discharging pipe 120.

[0041] In order to allow the glue to flow smoothly from the glue outlet pipe 120 to the glue brush 200, specifically, the material of the glue outlet pipe 120 is at least one of polytetrafluoroethylene, polyimide, and polyetherketone. It should be noted that polytetrafluoroethylene, polyimide, and polyetherketone materials all have excellent chemical stability. On the one hand, they are not easily corroded by reacting with glue, and on the other hand, they are not easily adhered to glue, thus avoiding the accumulation of glue in the glue outlet pipe 120, and also facilitating the cleaning of the glue outlet pipe 120 after use. It should be emphasized that the material of the glue outlet pipe 120 is not limited to the above materials, and any material with chemical stability and not easy to stick can be used.

[0042] In order to ensure that the amount of glue flowing from the glue outlet pipe 120 to the glue brush 200 is within an appropriate range, specifically, the inner diameter size range of the glue outlet pipe 120 is 0.3mm-5mm. In the specific setting, the inner diameter size of the glue outlet pipe 120 can be any value of 0.8mm, 1.5mm, 2.8mm, 3.6mm, 4.7mm and 0.3mm-5mm. This is the optimal range obtained by the applicant through repeated experiments. When the inner diameter size of the glue outlet pipe 120 is less than 0.3mm, the glue output is too small, and the glue is difficult to cover the welding strip and the battery string around the welding strip; when the inner diameter size of the glue outlet pipe 120 is greater than 5mm, the glue output is too large, the glue will flow everywhere and increase the curing time, affecting production efficiency. Therefore, the preferred inner diameter size range of the glue outlet pipe 120 of this application is 0.3mm-5mm.

[0043] In order for the glue flowing out along the bristles of the glue brush 200 to coat the solder strips and battery cells, in a preferred embodiment, the diameter of the bristles in the glue brush 200 is in the range of 0.05mm-1mm. In the specific setting, the diameter of the bristles can be any value among 0.08mm, 0.1mm, 0.3mm, 0.6mm and 0.05mm-1mm. This is the optimal range obtained by the applicant through repeated experiments. When the diameter of the bristles is greater than 1mm, the amount of glue output is too small and uneven, and it is difficult for the glue to evenly cover the solder strips and the battery strings around the solder strips; when the diameter of the bristles is less than 0.05mm, the glue easily overflows and causes waste. Therefore, the preferred diameter range of the bristles in the glue brush 200 of this application is 0.05mm-1mm.

[0044] It should be noted that when applying glue to the solder strip and the battery string, the bristles in the glue brush 200 directly contact the solder strip and the battery string. In order not to scratch the solder strip and the battery string, the bristles are specifically made of at least one of polyethylene terephthalate (PET) and plant fiber. In the specific setting, the plant fiber can be preferably made of white-brown material. It should be emphasized that the material of the bristles in this application is not limited to the above-mentioned PET and plant fiber, and the bristles can be made of any material with good flexibility.

[0045] In order to apply a suitable amount of glue on the solder strip and the battery cell at one time, in a preferred embodiment, the number of glue brushes 200 ranges from 5 to 40. In the specific configuration, the specific number of glue brushes 200 can be 10, 15, 20, 25, and any value between 5 and 40. This is the optimal range obtained by the applicant through repeated experiments. When the number of glue brushes 200 is less than 5, the amount of glue produced is insufficient to cover the solder strip and the battery string around the solder strip; when the number of glue brushes 200 is greater than 40, excessive glue production is likely to cause waste. Therefore, the preferred number of glue brushes 200 in this application ranges from 5 to 40.

[0046] In order to reasonably distribute multiple glue brushes 200 on the glue discharge tube 110, specifically, the length range of the glue discharge tube 110 is 80mm-500mm. When specifically set, the length of the glue discharge tube 110 can be 100mm, 200mm, 280mm, 420mm and any value of 80mm-500mm. When facing welding strips of different lengths, different lengths of the glue discharge tube 110 are selected. At the same time, in order to store a suitable amount of glue in the glue discharge tube 110, the diameter range of the glue discharge tube 110 is 10mm-200mm. When specifically set, the diameter of the glue discharge tube 110 can be 35mm, 85mm, 120mm, 160mm and any value of 10mm-200mm. When the diameter of the glue discharge tube 110 is within the above range, it can be ensured that there is enough glue for the glue brush 200 to apply when in use. In order to prevent the glue discharge tube 110 from sticking to the glue, the material of the glue discharge tube 110 can be at least one of polytetrafluoroethylene, polyimide, and polyether ketone. The above materials have good chemical stability and non-stickiness, which prevents glue from accumulating in the glue discharge tube 120 and facilitates cleaning of the glue discharge tube 110 after use.

[0047] In order to be able to apply more welding strips and battery strings, in a preferred embodiment, the glue application mechanism 10 also includes a glue storage module 400, and the glue storage module 400 includes a glue storage barrel 410 and a glue delivery pipe 420 connected to the glue storage barrel 410, and the glue delivery pipe 420 is connected to the glue output module 100 on the side away from the glue storage barrel 410, and glue is stored in the glue storage barrel 410. In the specific setting, the glue storage barrel 410 is connected to the air intake module 300, and the glue delivery pipe 420 is specifically connected to the glue output cylinder 110 in the glue output module 100. In order to prevent the glue storage barrel 410 from sticking to the glue, the glue storage barrel 410 is selected from polytetrafluoroethylene, polyimide, polyether ketone and other materials that are not easy to stick, and it is also convenient to clean the glue storage barrel 410 after use. Through the above arrangement, the glue in the glue storage cylinder can be promptly replenished into the glue outlet cylinder 110 through the glue delivery tube 420, thereby extending the service life of the glue outlet cylinder 110, so that more solder strips and battery strings can be coated.

[0048] An embodiment of the present application further provides a glue printing device, which includes a transmission line, a glue applying seat and a glue applying mechanism 10 as described in any of the above embodiments, wherein the transmission line is used to transmit battery strings and pause the transmission at preset intervals, the glue applying mechanism 10 can be installed on the glue applying seat movably along the transmission direction of the transmission line, and the glue applying mechanism 10 is located above the transmission line and can be raised and lowered toward the transmission line, and the glue applying mechanism 10 is used to apply glue to the soldering strip and the battery cells around the soldering strip when the transmission is paused.

[0049] In the specific configuration, the glue printing device further includes a lifting mechanism installed on the glue application seat and a transverse movement mechanism connected to the output end of the lifting mechanism, and the output end of the transverse movement mechanism is connected to the glue application mechanism 10. That is, the glue application mechanism 10 is lifted and lowered by the lifting mechanism, and the glue application mechanism 10 moves along the transmission direction by the transverse movement mechanism. The lifting mechanism can be lifted and lowered by a cylinder, a gear rack, or a hinge. The transverse movement mechanism can be a screw motor structure.

[0050] In specific use, when the battery cells in the battery string pass through the transmission line, the glue applying mechanism 10 moves down while the air inlet module 300 inflates the glue outlet module 100, so that the glue overflows on the glue brush 200. After the glue brush 200 contacts the solder strip on the battery cell, the glue applying mechanism 10 moves horizontally so that the glue on the glue brush 200 is applied to the solder strip and the battery cells around the solder strip. After the coating is completed, the battery string with the glue continues to move horizontally. After the next battery cell to be coated is transferred to the coating position of the previous cell, the glue applying mechanism 10 returns to the initial position for a new round of brushing, and the entire battery string is coated back and forth in this way. Through the above-mentioned settings, the automation of brushing the solder strip and the battery cells around the solder strip with the glue brush 200 is realized, and the production efficiency is improved.

[0051] The above-mentioned glue printing device includes a glue applying mechanism 10, and the air inlet module 300 in the glue applying mechanism 10 inputs air pressure to the glue discharging module 100, so that the glue in the glue discharging module 100 flows to the glue brush 200 under the action of the air pressure, and the glue brush 200 applies the glue to the solder strip and the battery cell around the solder strip to achieve the bonding of the solder strip and the battery cell. Compared with the traditional screen printing glue method, the present proposal uses the glue brush 200 to apply the battery string. On the one hand, there is no need to use a screen, and there is no problem of uneven glue application caused by screen deformation; on the other hand, the glue flows to the glue brush 200 under the action of the air pressure input by the air inlet module 300, and there is no additional mechanism such as a scraper to stir the glue, and it is not easy to generate bubbles; and when the glue brush 200 applies the glue, the bristles of the glue brush 200 can expand outward, which can cover the solder strip and the battery cell in a larger range, reducing the position requirements for the battery cell, which is conducive to reducing the difficulty of glue application and facilitating the increase of production.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A glue applying mechanism, used for applying glue to a battery string, wherein the battery string comprises a battery cell and a welding strip arranged on the battery cell, characterized in that: The glue applying mechanism comprises: A glue discharging module, wherein the interior of the glue discharging module is used for caching glue; A plurality of glue brushes, which are spaced apart in the glue discharging module and are all connected to the inside of the glue discharging module, and are used to apply the glue in the glue discharging module to the soldering strip and the battery cell around the soldering strip; An air intake module is connected to the glue discharging module, and is used to transmit gas to the glue discharging module so that the glue in the glue discharging module flows to the glue brush under the action of air pressure.

2. The glue applying mechanism according to claim 1, characterized in that: The glue discharging module comprises a glue discharging cylinder and a glue discharging pipe connected to the glue discharging cylinder. The glue is stored in the glue discharging cylinder. The side of the glue discharging pipe facing away from the glue discharging cylinder is connected to the glue brush.

3. The glue applying mechanism according to claim 2, characterized in that: The material of the rubber outlet hose is one of polytetrafluoroethylene, polyimide and polyether ketone.

4. The glue applying mechanism according to claim 2, characterized in that: The inner diameter of the rubber outlet pipe ranges from 0.3 mm to 5 mm.

5. The glue applying mechanism according to claim 1, characterized in that: The diameter of the bristles in the rubber brush ranges from 0.05 mm to 1 mm.

6. The glue applying mechanism according to claim 5, characterized in that: The material of the bristles is one of polyethylene terephthalate and plant fiber.

7. The glue applying mechanism according to claim 1, characterized in that: The number of the rubber brushes ranges from 5 to 40.

8. The glue applying mechanism according to claim 2, characterized in that: The length of the rubber discharging cylinder ranges from 80 mm to 500 mm, and the diameter of the rubber discharging cylinder ranges from 10 mm to 200 mm.

9. The glue applying mechanism according to claim 1, characterized in that: The glue application mechanism also includes a glue storage module, which includes a glue storage barrel and a glue delivery pipe connected to the glue storage barrel. The side of the glue delivery pipe facing away from the glue storage barrel is connected to the glue output module, and the glue is stored in the glue storage barrel.

10. A rubber printing device, characterized in that: The glue printing device comprises a transmission line, a glue applying seat and a glue applying mechanism as claimed in any one of claims 1 to 9, wherein: The transmission line is used to transmit the battery string and suspend the transmission every preset time; The glue applying mechanism can be installed on the glue applying seat so as to be movably along the transmission direction of the transmission line, and the glue applying mechanism is located above the transmission line and can be raised and lowered toward the transmission line. The glue applying mechanism is used to apply the glue to the solder strip and the battery cells around the solder strip when the transmission is paused.

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