Glue stringing system for solar cells

Abstract

The glue stringing system for the solar cells comprises a transmission unit, a glue applying unit and a curing forming unit, the glue applying unit comprises a glue applying mesh plate and a glue scraping mechanism, and the glue scraping mechanism comprises a double-scraper assembly and a power assembly. On one hand, on the basis of one-blocking and one-scraping switching of the double-scraping-knife assembly, the direction of the scraping and coating movement is opposite to the inclined direction of the selected left and right scraping knife sets, the deformation quantity of the scraping knives on the sizing mesh plate is relatively eliminated in combination with reciprocating motion, and meanwhile, two times of glue scraping can be completed through one-feeding and one-returning under the condition that the scraping knives form whole-process attaching glue scraping; the glue scraping quality and efficiency are greatly improved, the probability of deformation of the glue applying mesh plate is small, and the service life of the glue applying mesh plate is prolonged; on the other hand, on the basis of the movable glue injection area, glue injection operation can be conducted anytime and anywhere, glue is squeezed into corresponding meshes in the mode that the glue liquid keeps the same glue amount in the back-and-forth movement process, and the glue applying uniformity is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaics, and in particular relates to a glue stringing system for solar cell sheets. Background Art

[0002] Traditional solar cells have metal electrodes on the front and back sides for extracting internal current, which can be divided into main grid and fine grid. The main grid mainly collects the current of the sub-grid and connects in series, while the fine grid is used to collect photogenerated carriers. As the grid line patterns develop successively, and they are 4BB, 5BB, MBB, and SMBB respectively, the main grid becomes thinner (reducing shading loss and silver consumption) and more (ensuring conductive performance). 0BB (no main grid) is a further upgrade of SMBB technology, using thinner welding ribbons and connecting fine grids to collect and extract current. This design significantly reduces the metal shielding area of ​​the battery backplane, increases the light receiving area, and thus improves the power generation efficiency of the photovoltaic panel. At the same time, the main grid and pad points are both composed of silver. In order to reduce costs and increase efficiency to the greatest extent, many factories have also cancelled the pad points after upgrading the no main grid technology. However, this will make it difficult to firmly fix the welding ribbon on the solar cell. Therefore, it is necessary to use corresponding fixed-point and positioning to implement glue application, and then solidify to connect the welding ribbon to the corresponding position.

[0003] At present, the fixed-point gluing method mainly uses a gluing station composed of a steel plate. Fixed-point gluing holes are formed on the steel plate, and then glue is injected and a scraper is moved horizontally to scrape the surface of the steel plate. The glue is gradually scraped into the fixed-point gluing holes and then squeezed onto the aligned battery cells below. Then it is cured to fix the solder strip (it should be noted that the glue itself has viscosity, so the fluidity is relatively poor).

[0004] However, the steel plate used is relatively thin, generally about 0.1~0.3mm thick, and generally, there are at least two battery cells under the steel plate, so the area formed is at least 350*350mm 2 As a result, the existing scraping coating has the following defects: 1) The contact position changes during scraping. The steel plate is more likely to deform as it moves toward the middle. In addition, the scraping force used cannot be adjusted adaptively, resulting in uneven glue application in the middle and at both ends. Therefore, the final bonding strength is uneven. At the same time, the glue spots formed are of different sizes. If the glue spots are too large, they will cause hidden cracks when passing through the laminator. If the glue spots are too small, they cannot meet the tensile force required by the welding strip. 2) Since the scraper has a certain inclination angle, most of the scraping is unidirectional, that is, after completing one scraping, it is reset before the next scraping. Moreover, the deformation caused by unidirectional scraping is also unidirectional, which makes it impossible for the steel plate deformation variables to effectively compensate for each other, thus greatly shortening the service life of the steel plate. At the same time, unidirectional scraping also has a glue injection problem, because glue needs to be injected on the moving side of the scraper each time, so the scraping efficiency is low. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an improved glue stringing system for solar cells, which is particularly suitable for 0BB battery structures.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A glue stringing system for solar cell sheets, comprising a transmission unit, a glue applying unit, and a curing and molding unit. The glue applying unit comprises a glue applying mesh plate and a glue scraping mechanism. The glue scraping mechanism comprises a double scraper assembly capable of switching states up and down, and a power assembly for driving the double scraper assembly to reciprocate along the length direction of the glue applying mesh plate. The double scraper assembly comprises a scraper seat, and left and right scraper groups mounted on the scraper seat. The left and right scraper groups both comprise a lifting part that is adjusted up and down, and a scraper installed at the output end of the lifting part and having a length covering the width of the mesh area of ​​the glue applying mesh plate. The two scrapers of the left and right scraper groups are moved from the top to the bottom. The upper and lower parts are connected by a plurality of scrapers, each of which is connected by a plurality of scrapers, and the plurality of scrapers are connected by a plurality of scrapers. The plurality of scrapers are connected by a plurality of scrapers, each of which is connected by a plurality of scrapers. The plurality of scrapers are connected by a plurality of scrapers, each of which is connected by a plurality of scrapers. The plurality of scrapers are connected by a plurality of scrapers, each of which is connected by a plurality of scrapers. The plurality of scrapers are connected by a plurality of scrapers, each of which is connected by a plurality of scrapers.

[0007] According to a specific implementation and preferred aspect of the present invention, the lifting part includes a main regulator and an auxiliary regulator installed on the scraper seat, wherein the main regulator is used to drive the scraper to move up and down relative to the glue mesh plate to fit and disengage; the auxiliary regulator is installed between the main regulator and the scraper and is used to adjust the drive of the scraper to adapt to the glue mesh plate as it deforms. Here, the auxiliary regulator plays a role similar to that of a spring, and can keep the scraper in contact with the glue mesh plate regardless of how the glue mesh plate deforms.

[0008] Preferably, the auxiliary regulator is a telescopic rod controlled by a proportional valve to adjust the power output; the main regulator is used to drive the auxiliary regulator to move up and down. Specifically, the telescopic rod is a pneumatic cylinder or a hydraulic cylinder, and can be adaptively adjusted according to the proportional valve to provide power to match the scraper movement to keep the glue mesh plate in contact (in other words, no matter in any position, it keeps dynamic balance in the up and down directions, so as to minimize the deformation rate of the glue mesh plate); and the main regulator can use commonly used lifting components (such as: power screw, telescopic cylinder, other linear motion methods).

[0009] Alternatively, the main regulator and the auxiliary regulator are both telescopic rods, wherein the main regulator and the auxiliary regulator share a power source, and the power source adaptively adjusts the auxiliary regulator output power based on the pressure change formed by the scraper. Here, the power source can actively change the pressure to meet the adaptive adjustment of the auxiliary regulator output power (in short, keep the forces in the up and down directions in a dynamic balance state to complete the laminating and scraping of glue). The effect formed in this way is better than the elastic pressure formed by the "spring", because the elastic pressure will increase the deformation rate of the glue mesh plate, while the adaptive adjustment is triggered by the deformation of the glue mesh plate itself, resulting in a small deformation rate of the glue mesh plate. In some specific embodiments, the telescopic rod is pneumatically or hydraulically driven, the main regulator and the auxiliary regulator are relatively connected through a proportional valve, and the output power of the auxiliary regulator is adjusted in real time based on the adjustment of the proportional valve. That is, the pressure is controlled in real time by adjusting the power flow based on the force change of the scraper to meet the needs of uniform scraping of glue.

[0010] According to a specific implementation and preferred aspect of the present invention, when scraping glue, one of the two scrapers is defined as a scraping knife and the other is defined as an intercepting knife, wherein the intercepting knife is located on the glue-applying mesh plate, and the scraping knife fits the glue-applying mesh plate until the scraping knife scrapes the entire mesh area, and then the intercepting knife moves downward to intercept the glue from moving forward, and the intercepting knife and the scraping knife switch states. In short, the so-called "one interception and one scraping" means: intercepting the glue liquid after scraping the glue to prevent it from continuing to move forward due to inertia; scraping means: fitting the glue-applying mesh plate to move and cover the entire mesh area.

[0011] At the same time, the specific meaning of "the direction of the scraping movement is opposite to the inclination direction of the selected left and right scraper groups" is: when scraping the glue to the left, select the scraper on the right; when scraping the glue to the right, select the scraper on the left. Preferably, the inclination angles of the two scrapers are acute angles, and the inclination angles remain equal. Generally, the inclination angle is between 45 and 75 degrees. Through the decomposition of pressure, part of it forms the pressure to maintain the fit, and the other part forms the power in the direction of movement, so that the deformation rate of the glue-applying mesh plate caused by the scraper is small.

[0012] In some specific embodiments, the bottom of each scraper forms a scraper surface, wherein the scraper surface is arranged to intersect with the glue mesh plate, and a line-surface contact is formed between the bottom edge of the scraper surface and the glue mesh plate for scraping glue. Through the line-surface contact, not only the friction between the scraper and the glue mesh plate is reduced, but also the best glue injection area is formed between the other parts of the scraper surface and the glue mesh plate. Therefore, once there is no glue, whether it is manual or automatic, it is necessary to inject the glue into the corresponding glue injection area. At the same time, due to the poor fluidity of the glue and the long scraper, the probability of glue escaping from the scraper is small. To put it another way, even if a small amount of glue leaks from the end of the scraper, it will not cause interference in the glue scraping because it is far away from the mesh area.

[0013] According to a specific implementation and preferred aspect of the present invention, each scraper comprises a blade holder and a blade body, wherein the blade body is mounted on the blade holder so as to be rotatable and adjustable around its own length direction. In short, its inclination angle can be adjusted to meet other different use conditions.

[0014] Preferably, the blade body includes a connecting portion rotatably connected to the blade seat, a blade body detachable from the connecting portion and having a scraper surface formed at the bottom, and the connecting portion limits the inclination angle of the blade body relative to the glue mesh plate through an external part detachable from the blade seat. Furthermore, the blade body gradually narrows from top to bottom from the left and right sides, and the angle formed between the scraper surface and the glue mesh plate is smaller than the inclination angle of the blade body itself. Here, based on the formation of the best glue accommodating area between the other parts of the inclined scraper surface and the glue mesh plate, the glue scraping is more evenly implemented (because the glue fills this area first, and as the scraper moves, the glue is scraped under the premise of sufficient glue).

[0015] In some specific embodiments, the scraper on the left is tilted to the right and the scraper on the right is tilted to the left. When scraping glue to the left, the scraper on the right is selected; when scraping glue to the right, the scraper on the left is selected. The meaning of "the direction of the scraping movement is opposite to the tilt direction of the selected left and right scraper groups" is further explained and improved.

[0016] In addition, the power assembly includes a power screw, a power nut seat, and a power motor, wherein the power screw extends in the left-right direction; the molding system also includes a height adjustment unit that drives the glue application unit to adjust the position of the glue application mesh plate in the up-down direction. That is, the power screw and the power nut seat form a transmission screw, and the height adjustment unit can use the same power assembly as the transmission screw, and for the convenience of implementation, a slide rail in the same direction as the screw can be used to form a motion guide.

[0017] Due to the implementation of the above technical solution, the present invention has the following advantages compared with the prior art: Based on the existing printing glue stringing of solar cells, the contact position changes during scraping, and the steel plate is more likely to deform as it moves toward the middle. Moreover, the scraping force used cannot be adjusted adaptively, resulting in uneven glue application in the middle and at both ends. Therefore, the final bonding strength is uneven. At the same time, the glue spots formed are of different sizes. If the glue spots are too large, they will cause hidden cracks when passing through the laminator. If the glue spots are too small, they cannot meet the required tension of the welding strip. In addition, since the scraper has a certain inclination angle, most of the scraping is unidirectional, that is, after completing one scraping, it is reset and then the next scraping is performed. Moreover, the deformation caused by unidirectional scraping is also unidirectional, resulting in the inability to effectively compensate for the deformation of the steel plate. Therefore, the service life of the steel plate is greatly shortened. At the same time, there is also a glue injection problem in unidirectional scraping, because each time the glue needs to be injected on the moving side of the scraper, so the scraping efficiency is low and other shortcomings. The present invention cleverly solves various shortcomings of the existing structure by overall design of the glue stringing system of the solar cell. After adopting the molding system, the right scraper is selected for scraping glue to the left, and the left scraper is selected for scraping glue to the right. Then, during the reciprocating motion of the double scraper assembly, the two scrapers are kept active and pressed on the glue mesh plate to keep the scraper in the single-pass scraping in close contact with the glue mesh plate to scrape glue. At the same time, the two scrapers are switched up and down, one blocking and one scraping, one blocking is used to intercept the glue liquid to continue to move forward, and the other scraping is kept in close contact with the glue. Therefore, two scraping operations can be performed in the left and right reciprocating motion. Therefore, on the one hand, the present invention is based on the one-blocking-one-scraping switching of the double scraper assembly, the direction of the scraping motion direction and the selected left and right scraper groups are opposite to the inclination direction. In combination with the reciprocating motion, the deformation amount caused by the scraper on the glue-applying mesh plate is relatively eliminated, and the uniformity of the size of the glue dots is improved under the full-length glue-applying scraping formed by the scraper, and two glue scrapings can be completed in one go, which greatly improves the quality and efficiency of the glue scraping, while reducing the probability of deformation of the glue-applying mesh plate and extending the life of the glue-applying mesh plate. On the other hand, based on the movable glue injection area, not only can the glue injection operation be performed anytime and anywhere, but also based on the glue interception formed by the scraper, the glue liquid will remain the same during the back-and-forth motion of the glue-applying area formed by the two scrapers, and the glue will be squeezed into the corresponding mesh in the sufficient glue mode to ensure the uniformity of the glue application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the glue stringing system of the solar cell sheet of this embodiment; Figure 2 for Figure 1 The structural diagram of the middle glue application unit; Figure 3 for Figure 1 Structural diagram of the middle scraper mechanism; Figure 4 for Figure 3 Schematic diagram of the local structure; Figure 5 for Figure 4 Schematic diagram of structural decomposition; Figure 6 for Figure 5 The main visual intention; Among them: 1. Transmission unit; 2. Glue application unit; 20. Glue application mesh plate; 20a. Mesh; 21. Glue scraping mechanism; 210. Double scraper assembly; a. Scraper seat; b. Left and right scraper groups; b1. Lifting part; b10. Main regulator; b11. Auxiliary regulator; b2. Scraper; b20. Scraper seat; b21. Scraper body; b210. Connecting part; b211. Scraper body; m. Scraper surface; b22. External parts; 211. Power assembly; c, c1. Power screw rod; d, d1. Power nut seat; e, e1. Power motor; h, h1. Slide rail; 3. Curing and molding unit; 4. Height adjustment unit; P. Battery cell. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention 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 invention, so the present invention is not limited by the specific embodiments disclosed below.

[0020] In the description of the present invention, it is to be understood that 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., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as limiting the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected 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 the present invention can be understood according to specific circumstances.

[0023] In the invention, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature 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, a first feature being “above”, “above”, or “above” a 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. A first feature being “below”, “below”, or “below” a 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.

[0024] It should be noted that when 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. When 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. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0025] like Figures 1 to 6 As shown, the glue stringing system for solar cell sheets of this embodiment includes a transmission unit 1, a glue applying unit 2, and a curing and molding unit 3, wherein the transmission unit 1 adopts an annular conveyor belt, the glue applying unit 2 is used to apply glue through the surface of the cell sheet, and the curing and molding unit 3 is used to cure the applied glue on the cell sheet P.

[0026] Specifically, the glue applying unit 2 includes a glue applying mesh plate 20 and a glue scraping mechanism 21, wherein the glue applying mesh plate 20 constitutes the bottom of the glue applying tank, and the bottom of the tank is arranged horizontally, the glue scraping mechanism 21 is installed above the glue applying tank, and the glue applying station is located directly below the glue applying tank.

[0027] In some specific embodiments, a mesh 20a for fixed-point glue application is formed on the glue-applying mesh plate 20, and the mesh area formed by the mesh 20a corresponds to two battery cells. The glue scraping mechanism 21 includes a double scraper assembly 210 that can switch between up and down relative states, and a power assembly 211 for driving the double scraper assembly 210 to reciprocate along the length direction of the glue-applying mesh plate 20.

[0028] In this example, the double scraper assembly 210 includes a scraper seat a, a left and right scraper group b installed on the scraper seat a, and the left and right scraper groups b both include a lifting part b1 that can be adjusted up and down, and a scraper b2 installed at the output end of the lifting part b1 and having a length covering the width of the mesh area of ​​the glue-applying mesh plate 20. At the same time, the two scrapers b2 of the left and right scraper groups b gradually open outward from top to bottom, and a glue injection area is formed between the open area and the glue-applying mesh plate 20. When the scraper b2 contacts the glue-applying mesh plate 20 and moves to scrape the glue, the lifting part b1 can also provide power to drive the scraper b2 to be pressed against the glue-applying mesh plate 20 to keep the scraper in single-pass coating in full contact with the glue-applying mesh plate 20.

[0029] In some specific embodiments, the lifting part b1 includes a main regulator b10 and an auxiliary regulator b11 installed on the scraper seat a, wherein the main regulator b10 is used to drive the scraper b2 to move up and down relative to the glue mesh plate 20 for fitting and disengagement; the auxiliary regulator b11 is installed between the main regulator b10 and the scraper b2 and is used to adjust the drive of the scraper b2 to adapt to the deformation of the glue mesh plate 20. Here, the auxiliary regulator plays a role similar to that of a spring, and can keep the scraper in contact with the glue mesh plate regardless of how the glue mesh plate is deformed. Further, the auxiliary regulator b11 is a telescopic rod controlled by a proportional valve to adjust the power output; the main regulator b10 is used to drive the auxiliary regulator b11 to move up and down. Specifically, the telescopic rod is a cylinder or a hydraulic cylinder, and the supply ratio can be adaptively adjusted according to the proportional valve to provide matching scraper movement to keep the power of the glue mesh plate (in other words, no matter in any position, it is dynamic balanced in the up and down directions, so as to minimize the deformation rate of the glue mesh plate); and the main regulator can use commonly used lifting components (such as: power screw, telescopic cylinder, other linear motion methods). Of course, the main regulator and the auxiliary regulator can also be telescopic rods, wherein the main regulator and the auxiliary regulator share a power source, and the power source adaptively adjusts the output power of the auxiliary regulator based on the pressure change formed by the scraper. Here, the power source can actively change the pressure to meet the adaptive adjustment of the auxiliary regulator output power. The effect formed in this way is better than the elastic pressure formed by the "spring", because the elastic pressure will increase the deformation rate of the glue mesh plate, while the adaptive adjustment is triggered by the deformation of the glue mesh plate itself, resulting in a small deformation rate of the glue mesh plate. That is, the pressure is controlled in real time by adjusting the power flow based on the force change of the scraper to meet the need for uniform scraping.

[0030] Specifically, the bottom of each scraper b2 forms a scraper surface m, wherein the scraper surface m is arranged to intersect with the glue mesh plate 20, and a line-surface contact is formed between the bottom edge of the scraper surface m and the glue mesh plate 20 for scraping glue. Through the line-surface contact, not only the friction between the scraper and the glue mesh plate is reduced, but also the best glue injection area is formed between the other parts of the scraper surface and the glue mesh plate. Therefore, once there is no glue, whether it is manual or automatic, it is necessary to inject the glue into the corresponding glue injection area. At the same time, due to the poor fluidity of the glue and the long scraper, the probability of the glue escaping from the scraper is small. To put it another way, even if a small amount of glue leaks from the end of the scraper, it will not cause interference in the scraping of glue because it is far away from the mesh area. Each scraper b2 includes a knife seat b20 and a knife body b21, wherein the knife body b21 is mounted on the knife seat b20 in a rotationally adjustable manner around its own length direction. In short, its inclination angle can be adjusted to meet other different usage conditions.

[0031] Furthermore, the blade body b21 includes a connecting portion b210 rotatably connected to the blade holder b20, and a blade body b211 detachably mounted on the connecting portion b210 and having a scraper surface m formed at the bottom. The connecting portion b210 limits the inclination angle of the blade body b211 relative to the glue mesh plate 20 through an external component b22 detachably mounted on the blade holder b20. Furthermore, the blade body b211 gradually narrows from top to bottom from the left and right sides, and the angle formed between the scraper surface m formed and the glue mesh plate 20 is smaller than the inclination angle of the blade body itself. Here, based on the formation of the best glue accommodating area between the other parts of the inclined scraper surface and the glue mesh plate, the glue scraping is implemented more evenly (because the glue fills this area first, and as the scraper moves, the glue scraping is performed under the premise of sufficient glue). At the same time, the scraper on the left is tilted to the right, and the scraper on the right is tilted to the left, and the tilt angle is 45-75° (preferably 50-70°), and the angle formed between the scraper surface m and the glue mesh plate 20 is less than 30°. In this example, three positioning holes are provided on the blade holder b20, and the external part b22 is a commonly used bolt part. After the angle is adjusted by rotation, the position is limited based on the positioning hole selected by the external part b22, so that its tilt angle is determined.

[0032] In addition, the power assembly 211 includes a power screw rod c, a power nut seat d, and a power motor e, wherein the power screw rod c extends in the left-right direction; the molding system also includes a height adjustment unit 4 for adjusting the position of the glue mesh plate 20 (the entire glue application unit 2) in the up-down direction by driving the glue application unit 2. That is, the power screw rod c and the power nut seat d form a transmission screw, and the height adjustment unit can use the same power assembly as the transmission screw, and for the convenience of implementation, a slide rail h in the same direction as the screw rod can be used to form a motion guide. Therefore, in this example, the height adjustment unit 4 has a corresponding power screw rod c1, a power nut seat d1, a power motor e1, and a slide rail h1.

[0033] In summary, the implementation process of this embodiment is as follows: First, the battery cells are fed side by side into the glue application station below the glue application mesh plate, and glue is injected into the glue injection area between the open area of ​​the two scrapers and the glue application mesh plate; Secondly, when scraping glue to the left, select the right scraper; when scraping glue to the right, select the left scraper, and then switch the two scrapers up and down to form one blocking and one scraping, one of the two scrapers is defined as a scraping knife, and the other is defined as an intercepting knife, wherein the intercepting knife is located on the glue-applying mesh plate, and the scraping knife fits the glue-applying mesh plate until the scraping knife scrapes the entire mesh area, and then the intercepting knife moves downward to intercept the glue from moving forward, and the intercepting knife and the scraping knife switch their states; then, in the direction of the scraping movement and the inclination of the selected left and right scraper groups, The directions are opposite, and a single-trip lamination and scraping of glue is completed under the pressure formed by the scraper being able to adjust in real time as the glue-applying mesh plate is deformed; at the same time, the next batch of batteries is sent to the corresponding glue-applying station, and the scraper is switched up and down, and continues to move in the opposite direction of the scraping movement direction and the inclination direction of the selected left and right scraper groups, and the return-trip lamination and scraping of glue is completed under the pressure formed by the scraper being able to adjust in real time as the glue-applying mesh plate is deformed, that is, the deformation of the glue-applying mesh plate caused by the scraper is relatively eliminated in combination with the reciprocating motion, and two scrapings can be completed in one go.

[0034] In addition, the so-called "one blocking and one scraping" means: intercepting the glue liquid after scraping to prevent it from continuing to move forward due to inertia; scraping means: the movement of the glue-applying mesh plate covers the entire mesh area. At the same time, the specific meaning of "the direction of the scraping movement is opposite to the inclination direction of the selected left and right scraper groups" is: when the scraping movement is to the left, select the scraper on the right; when the scraping movement is to the right, select the scraper on the left. Preferably, the inclination angles of the two scrapers are acute angles, and the inclination angles remain equal. Generally, the inclination angle is between 45 and 75°. Through the decomposition of pressure, part of the pressure to maintain adhesion is formed, and the other part forms the power in the direction of movement, so that the deformation rate of the glue-applying mesh plate caused by the scraper is small.

[0035] Therefore, after adopting the forming system, the right scraper is selected based on scraping glue to the left, and the left scraper is selected for scraping glue to the right. Then, during the reciprocating motion of the double scraper assembly, the two scrapers are kept active and pressed against the glue mesh plate to keep the scraper in the single-pass scraping in full contact with the glue mesh plate to implement the scraping of glue. At the same time, the two scrapers are switched up and down, one blocking and one scraping, one blocking is used to intercept the glue liquid to continue to move forward, and the other scraping is used to keep in contact with the glue. Therefore, two scraping operations can be implemented in the left and right reciprocating motion. Therefore, on the one hand, the present invention is based on the one-blocking-one-scraping switching of the double scraper assembly, the direction of the scraping movement is opposite to the inclination direction of the selected left and right scraper groups, and the reciprocating motion is combined to perform the relative elimination of the deformation amount caused by the scraper to the glue mesh plate and the full contact with the scraper formed by the scraper. High uniformity of glue point size, and two scrapings can be completed in one go, which greatly improves the quality and efficiency of scraping glue, while reducing the probability of deformation of the glue-applying mesh plate and extending the life of the glue-applying mesh plate; on the other hand, based on the movable glue injection area, not only can the glue injection operation be performed anytime and anywhere, but also based on the glue interception formed by the scraper, the glue liquid will remain the same during the back and forth movement of the scraping area formed by the two scrapers, and the glue will be squeezed into the corresponding mesh in the sufficient glue mode to ensure the uniformity of glue application; thirdly, through the coordinated use of the main regulator and the auxiliary regulator, the auxiliary regulator can adjust the pressure of the scraper on the glue-applying mesh plate according to the control of the proportional valve, and keep the upper and lower directions in a dynamic balance state for fitting and scraping glue, so that the effect formed is better than that of the "spring". Elastic pressure is formed, because elastic pressure will increase the deformation rate of the glue-applying mesh plate, while adaptive adjustment is triggered by the deformation of the glue-applying mesh plate itself, resulting in a small deformation rate of the glue-applying mesh plate; fourthly, through line-surface contact, not only the friction between the scraper and the glue-applying mesh plate is reduced, but also the best glue injection area is formed between the other parts of the scraper surface and the glue-applying mesh plate. Therefore, once there is no glue, whether it is manual or automatic, it is necessary to inject the glue into the corresponding glue injection area. At the same time, due to the poor fluidity of the glue and the long scraper, the probability of glue escaping from the scraper is small. Even if a small amount of glue leaks out from the end of the scraper, it will not cause interference in scraping the glue because it is far away from the mesh area; the fifth aspect is based on the tilting of other parts of the scraper surface and the glue mesh The best glue holding area is formed between the plates, so that the glue is scraped more evenly (because the glue fills the area first, and as the scraper moves, the glue is scraped under the premise of sufficient glue); in the sixth aspect, the scraper on the left is tilted to the right and the scraper on the right is tilted to the left. When scraping the glue to the left, the scraper on the right is selected; when scraping the glue to the right, the scraper on the left is selected, further explaining and perfecting the meaning of "the direction of the scraping movement is opposite to the inclination direction of the selected left and right scraper groups", and at the same time, the inclination angles of the two scrapers are acute angles, and the inclination angles are kept equal, generally between 45 and 75 degrees, and through the decomposition of pressure, part of the pressure to maintain the fit is formed, and the other part forms the power in the direction of movement, so that the deformation rate of the glue-applied mesh plate caused by the scraper is small;In the seventh aspect, the transmission screw arranged in the left and right directions is used for reciprocating drive, and the transmission screw arranged in the up and down directions is used for height adjustment, which is not only convenient to implement, but also has high motion accuracy and is easy to control. ;

[0036] The above detailed description of the present invention is intended to enable persons familiar with the art to understand the contents of the present invention and implement them. It does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A glue stringing system for solar cell sheets, comprising a transmission unit, a glue applying unit, and a curing and molding unit, wherein the glue applying unit comprises a glue applying mesh plate and a glue scraping mechanism, and is characterized in that: The scraping mechanism includes a double scraper assembly that can switch between up and down relative states, a power assembly for driving the double scraper assembly to reciprocate along the length direction of the glue-applying mesh plate, the double scraper assembly includes a scraper seat, a left and right scraper group installed on the scraper seat, the left and right scraper groups both include a lifting part that can be adjusted up and down, and a scraper installed at the output end of the lifting part and having a length covering the width of the mesh area of ​​the glue-applying mesh plate, the two scrapers of the left and right scraper groups gradually open outward from top to bottom, and a glue injection area is formed between the open area and the glue-applying mesh plate ; When the scraper contacts the glue-applying mesh plate and moves to scrape the glue, the lifting part can also provide power to drive the scraper to be pressed against the glue-applying mesh plate to keep the scraper in full contact with the glue-applying mesh plate during single-pass scraping; in the reciprocating scraping of the glue, the double scraper assembly is switched up and down by two scrapers, one for blocking and one for scraping, and the direction of the scraping movement is opposite to the inclination direction of the selected left and right scraper groups, so that the deformation of the glue-applying mesh plate caused by the two scrapers is relatively eliminated and the glue between the two scrapers is scraped twice.

2. The solar cell glue stringing system according to claim 1, characterized in that: The lifting part includes a main regulator and an auxiliary regulator installed on the scraper seat, wherein the main regulator is used to drive the scraper to move up and down relative to the glue applying mesh plate for adhesion and disengagement; the auxiliary regulator is installed between the main regulator and the scraper and is used to adjust the scraper to maintain adaptive adhesion as the glue applying mesh plate deforms.

3. The solar cell glue stringing system according to claim 2, characterized in that: The auxiliary regulator is a telescopic rod controlled by a proportional valve to adjust the power output; the main regulator is used to drive the auxiliary regulator to move up and down.

4. The solar cell glue stringing system according to claim 2, characterized in that: The main regulator and the auxiliary regulator are both telescopic rods, wherein the main regulator and the auxiliary regulator share a power source, and the power source adaptively adjusts the output power of the auxiliary regulator based on the pressure change formed by the scraper.

5. The solar cell glue stringing system according to claim 4, characterized in that: The telescopic rod is pneumatically or hydraulically driven, the main regulator and the auxiliary regulator are relatively connected through a proportional valve, and the output power of the auxiliary regulator is adjusted in real time based on the adjustment of the proportional valve.

6. The solar cell glue stringing system according to claim 1, characterized in that: When scraping glue, one of the two scrapers is defined as a scraper knife and the other is defined as an intercepting knife, wherein the intercepting knife is located on the glue-applying mesh plate, and the scraper knife is attached to the glue-applying mesh plate until the scraper knife scrapes the entire mesh area, and then the intercepting knife moves downward to intercept the glue from moving forward, and the intercepting knife and the scraper knife switch states.

7. The solar cell glue stringing system according to claim 1, characterized in that: The two scrapers have an acute angle of inclination, and the inclination angles are kept equal; and / or, the bottom of each scraper forms a scraper surface, wherein the scraper surface is arranged to intersect with the glue-applying mesh plate, and a line-surface contact scraping glue is formed between the bottom edge of the scraper surface and the glue-applying mesh plate.

8. The solar cell glue stringing system according to claim 1, characterized in that: Each of the scrapers comprises a blade seat and a blade body, wherein the blade body is mounted on the blade seat in a manner that it can be rotated and adjusted around its own length direction.

9. The solar cell glue stringing system according to claim 8, characterized in that: The knife body includes a connecting part rotatably connected to the knife seat, a knife body detachable from the connecting part and forming a scraper surface at the bottom, and the connecting part limits the inclination angle of the knife body relative to the glue mesh plate through an external part detachable from the knife seat.

10. The solar cell glue stringing system according to claim 9, characterized in that: The blade body gradually narrows from the left and right sides from top to bottom, and the angle formed between the scraper surface and the glue-applying mesh plate is smaller than the inclination angle of the blade body itself.

11. The solar cell glue stringing system according to claim 10, characterized in that: The scraper on the left side is inclined to the right, and the scraper on the right side is inclined to the left. When the scraper is moved to the left to scrape the glue, the scraper on the right side is selected; when the scraper is moved to the right to scrape the glue, the scraper on the left side is selected.

12. The solar cell glue stringing system according to claim 1, characterized in that: The power assembly includes a power screw, a power nut seat, and a power motor, wherein the power screw extends in the left-right direction; the molding system also includes a height adjustment unit for driving the glue application unit to adjust the position of the glue application mesh plate in the up-down direction.

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