Glue printing device

Abstract

The utility model discloses a glue printing device which comprises a container with one face open, a cavity used for storing glue liquid is formed in the container, the container comprises a glue printing plate arranged on one side of the cavity, and glue holes communicating the cavity with the outside are formed in the glue printing plate; the sealing cover covers the opening to seal the cavity, and an inflation hole communicated with the cavity is formed in the sealing cover; and the pressurization mechanism comprises an output end communicated with the inflation hole, and the pressurization mechanism is used for injecting gas into the cavity through the inflation hole. Glue liquid is discharged from the glue holes under the action of pressure to achieve glue printing operation, it is guaranteed that the range of the size and height of glue points is small, the uniformity of the welding effect of all point positions of a battery piece is better during follow-up welding, and follow-up various adjustments can be carried out on defects in the welding stage more easily; more glue liquid can be added into the container at one time, the production continuity is good, the glue liquid is prevented from being polluted, and the yield and the reliability of the assembly are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cell manufacturing, in particular to a glue printing device. Background Art

[0002] In the packaging of photovoltaic modules, it is necessary to weld the cells in series to obtain high voltage equipment. At present, there are three main types of cell welding processes: multi-busbar MBB, super-multi-busbar SMBB and busbar-free 0BB. Among them, busbar-free welding eliminates the silver electrode of the cell busbar and replaces it with a welding strip, which can be directly interconnected with the fine grid to collect the fine grid current, which can effectively reduce metal consumption. The diameter of the welding strip is 0.2mm, the shading area is smaller, and the current transmission distance is shorter, thereby reducing power loss and improving power generation efficiency.

[0003] At present, the glue printing method of the main grid-less welding machine is to use a scraper to force the photocuring glue through the stencil and onto the battery cell. However, when the scraper applies downward force, the force in the middle of the stencil is greater than that on the surrounding areas, which will cause deformation of the glue printing stencil and easily cause uneven glue height of the glue points. This may lead to the risk of battery cells being easily cracked, the glue film being cracked by the glue points, and the soldering ribbon being pulled off track during the subsequent lamination process. Utility Model Content

[0004] The purpose of the present application is to provide a glue printing device to solve the problem in the prior art that the glue printing method without a main grid welding machine easily causes uneven glue height of the glue points, which may lead to the technical problems of the risk of battery cells being easily cracked, the glue film being cracked by the glue points, and the welding strip being pulled off track during the subsequent lamination process.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] Provided is a rubber printing device, comprising:

[0007] A container, one side of which is open, wherein a cavity for storing glue is formed in the container, wherein the container comprises a printing rubber plate arranged at one side of the cavity, wherein the printing rubber plate is provided with glue holes communicating with the cavity and the outside;

[0008] A sealing cover, which is arranged at the opening to seal the cavity, and the sealing cover is provided with an air filling hole communicating with the cavity;

[0009] The pressurizing mechanism comprises an output end connected to the inflation hole, and the pressurizing mechanism is used to inject gas into the cavity through the inflation hole.

[0010] In one or more embodiments, the sealing cover includes a cover plate and a circle of surrounding plates arranged on the outer edge of the cover plate facing the container, the surrounding plates are in contact with the side wall of the container to seal the cavity, and the inflation holes are arranged on the surrounding plates.

[0011] In one or more embodiments, the inflation hole is arranged on the inner wall of the enclosure, the cover plate is provided with an air inlet hole connected to the output end of the boost mechanism, and the sealing cover is provided with an air inlet passage connecting the inflation hole and the air inlet hole.

[0012] In one or more embodiments, the enclosure is a double-layer structure, and the enclosure includes an outer layer plate and an inner layer plate, the inflation hole is set through the inner layer plate, and the air intake channel includes a cavity arranged between the outer layer plate and the inner layer plate.

[0013] In one or more embodiments, an air intake box is arranged on a side of the cover plate facing away from the container, an air intake cavity connected to the air intake hole is formed inside the air intake box, and an output end of the boost mechanism is connected to the air intake cavity.

[0014] In one or more embodiments, the boost mechanism includes a boost pump and a boost pipe, the output end is arranged at the end of the boost pipe, and the boost pipe, the air intake box and the cover plate are integrally formed.

[0015] In one or more embodiments, a plurality of the inflation holes distributed on different sides are arranged on the enclosure.

[0016] In one or more embodiments, the glue printing device also includes a pressure sensor, which is arranged on the side of the glue printing plate facing the cavity to detect the pressure at the glue hole, and the booster mechanism is used to intermittently inject gas into the cavity so that the reading of the pressure sensor gradually increases to a preset threshold value and then gradually decreases during the glue printing operation, and the reading of the pressure sensor remains unchanged during the non-glue printing operation.

[0017] In one or more embodiments, a sealing strip is arranged between the sealing cover and the container.

[0018] In one or more embodiments, the printing plate is arranged below the cavity.

[0019] In one or more embodiments, the inflation holes are extended in a direction parallel to the liquid surface of the glue.

[0020] Different from the prior art, the beneficial effects of this application are:

[0021] The glue printing device of the present application can inject gas into the cavity through a boosting mechanism to achieve cavity pressurization, and the glue liquid is discharged from the glue hole under pressure to achieve the glue printing operation. Since the pressure of the glue holes at various locations is consistent, it can effectively ensure that the size and height of the glue points have a small range. During subsequent welding, the welding effects of various points on the battery cell are more uniform, and it is easier to make various subsequent adjustments to defects in the welding stage.

[0022] The glue printing device of the present application realizes the glue printing operation through a closed container, and a large amount of glue liquid can be added into the container at one time, reducing the frequency of manual addition of glue liquid, having good production continuity, and preventing the glue liquid from being contaminated, thereby reducing the probability of defects such as foreign matter / bubbles appearing after subsequent component lamination, thereby improving the component yield and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a photo of glue dots of the existing glue printing method;

[0025] Figure 2 It is a structural schematic diagram of an implementation method of the printing glue device of the present application;

[0026] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0027] Figure 4 This is a schematic diagram of an application scenario of an implementation method of a printing glue device of the present application;

[0028] Figure 5 It is a schematic cross-sectional structural diagram of another embodiment of the printing glue device of the present application.

[0029] As shown in the figure:

[0030] Container 100; opening 101; printing plate 102; glue hole 103; sealing strip 104;

[0031] Sealing cover 200; inflation hole 201; cover plate 202; enclosure plate 203; outer plate 2031; inner plate 2032; air inlet channel 204; clamping cavity 205;

[0032] Cavity 300;

[0033] Glue 400;

[0034] Pressurizing mechanism 500; output end 501; pressurizing pump 502; pressurizing pipeline 503;

[0035] Air intake box 600; air intake chamber 601;

[0036] Pressure sensor 700. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of this application.

[0038] At present, the glue printing method of the main grid-free welding machine is to use a scraper to force the light-curing glue through the stencil and onto the battery cell. However, when the scraper is applied downward, the force in the middle of the stencil is greater than that around it, which will cause the glue printing stencil to deform, and it is impossible to keep the glue point size and height to a small range, resulting in an unstable welding effect. Please refer to Figure 1 , Figure 1 This is a photo of glue dots in existing glue printing methods, such as Figure 1 As shown in the figure, the size and height of the glue dots vary greatly, which will affect the subsequent welding effect.

[0039] In order to solve the above problems, the applicant has developed a new type of glue printing device, which can improve the phenomenon of uneven glue points and large range, significantly improve welding stability, and improve welding effect.

[0040] Specifically, see Figure 2 and Figure 3 , Figure 2 It is a structural schematic diagram of an embodiment of the printing glue device of the present application. Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of AA.

[0041] like Figure 2 and Figure 3 As shown, the printing device includes a container 100 and a sealing cover 200.

[0042] The container 100 is provided with an opening 101 on one side, and a cavity 300 for storing the glue 400 is formed inside the container 100 .

[0043] The container 100 includes a rubber plate 102 arranged at the bottom side of the cavity 300 , and a rubber hole 103 communicating the cavity 300 with the outside is arranged on the rubber plate 102 .

[0044] In the present embodiment, the glue holes 103 are evenly arranged on the printed rubber plate 102. In other embodiments, the arrangement of the glue holes 103 can also be adjusted based on actual working conditions to meet the needs of different scenarios. In particular, in the present embodiment, the printed rubber plate 102 is arranged on the bottom side of the cavity 300. In other embodiments, the arrangement position of the printed rubber plate 102 can also be adjusted based on actual working conditions, and the effect of the present embodiment can be achieved.

[0045] The sealing cover 200 is disposed on the opening 101 to seal the cavity 300 , and a gas filling hole 201 communicating with the cavity 300 is arranged on the sealing cover 200 .

[0046] The printing glue device further includes a pressurizing mechanism 500 . The pressurizing mechanism 500 includes an output end 501 connected to the gas filling hole 201 . The pressurizing mechanism 500 is used to inject gas into the cavity 300 through the gas filling hole 201 .

[0047] It can be understood that by injecting gas into the cavity 300 through the booster mechanism 500, the cavity 300 can be pressurized, and the glue liquid 400 can be pressed out from the glue hole 103 under the pressure to complete the glue printing operation. Based on the air pressure control, the pressure of each glue hole 103 can be guaranteed to be consistent, so as to ensure that the size and height difference of the glue point are small, which helps to ensure the stability and effect of subsequent welding.

[0048] In this embodiment, the sealing cover 200 includes a cover plate 202 and a circle of surrounding plates 203 arranged on the outer edge of the cover plate 202 facing the container 100 . The surrounding plates 203 are in contact with the side wall of the container 100 to seal the cavity 300 .

[0049] In order to improve the sealing stability between the sealing cover 200 and the container 100, a sealing strip 104 is also arranged between the enclosure 203 and the side wall of the container 100; in particular, in order to ensure the connection stability between the sealing cover 200 and the container 100, a conventional connecting and fixing structure can also be provided between the sealing cover 200 and the container 100, such as a snap-fit ​​structure, a threaded structure, etc., which will not be repeated here.

[0050] In this embodiment, in order to avoid the problem of uneven pressure in various parts of the glue liquid 400 caused by direct blowing of gas into the glue liquid 400, the inflation hole 201 can be arranged on the enclosure 203; in particular, the inflation hole 201 can be extended along the direction x parallel to the liquid surface of the glue liquid 400, so that the gas can be blown horizontally into the cavity 300, effectively ensuring the consistency of the pressure in various parts of the glue liquid 400, which helps to improve the size and height uniformity of the glue dots.

[0051] In this embodiment, the inflation hole 201 is arranged on the inner wall of the enclosure 203 , the cover plate 202 is further provided with an air inlet hole 206 connected to the output end 501 of the supercharging mechanism 500 , and an air inlet channel 204 is arranged inside the sealing cover 200 .

[0052] Among them, the air inlet channel 204 is opened inside the sealing cover 200, one end of which can be connected to the air inlet hole 206 on the cover plate 202, and the other end can be connected to the inflation hole 201 on the enclosure 203. The gas passes through the air inlet hole 206, the air inlet channel 204 and the inflation hole 201 in sequence into the cavity 300, thereby pressurizing the cavity 300 and avoiding direct blowing of the gas into the glue liquid 400.

[0053] In order to facilitate the connection between the boosting mechanism 500 and the air inlet hole 206, an air inlet box 600 is arranged on the side of the cover plate 202 facing away from the container 100, and an air inlet cavity 601 connected to the air inlet hole 206 is formed inside the air inlet box 600, and the output end 501 of the boosting mechanism 500 is connected to the air inlet cavity 601.

[0054] Specifically, in this embodiment, the boosting mechanism 500 may include a boosting pump 502 and a boosting pipe 503 connected to the boosting pump 502, wherein the boosting pipe 503 may be connected to the air inlet cavity 601 to pressurize the interior of the cavity 300. In particular, in order to improve the overall air tightness, the boosting pipe 503, the air inlet box 600 and the cover plate 202 may be integrally formed.

[0055] In order to further ensure that the pressure is consistent at all locations in the cavity 300, in this embodiment, a circle of inflation holes 201 are evenly arranged on the enclosure 203, so that the gas can evenly enter the cavity 300 from all locations on the circumference; in other embodiments, the position and number of the inflation holes 201 can also be adjusted based on actual working conditions, and the effect of this embodiment can be achieved.

[0056] In order to achieve pressure control during the printing process, in this embodiment, a pressure sensor 700 is arranged on the side of the printing plate 102 facing the cavity 300. The pressure sensor 700 is used to detect the pressure at the glue hole 103, so that quantitative glue printing can be achieved by controlling the pressure at the glue hole 103.

[0057] See also Figure 4 , Figure 4 Schematic diagram of an application scenario of an embodiment of the printing glue device of the present application. Figure 4 As shown, the glue printing operation is not a continuous operation. It needs to be carried out after the battery cells are loaded. The battery cells after glue printing are sequentially subjected to the curing and welding processes. After the next batch of battery cells are loaded, the glue printing device continues to carry out the glue printing operation. Therefore, it is necessary to intermittently inject gas into the cavity 300 to ensure that the glue liquid 400 is discharged from the glue hole 103 only during the glue printing operation. When the glue printing operation is not in progress, the cavity 300 and the external pressure are balanced, and the glue liquid 400 cannot be discharged.

[0058] Specifically, during the glue printing operation, the boosting mechanism 500 can continuously inject gas into the cavity 300 until the indication of the pressure sensor 700 reaches a preset threshold value. During this process, the glue liquid 400 is continuously discharged from the glue hole 103 and drips onto the surface of the battery cell. The gas injection can then be stopped. At this time, the glue liquid 400 is still continuously discharged from the glue hole 103, and the internal pressure of the cavity 300 is gradually reduced until the internal and external pressures of the cavity 300 reach equilibrium, completing the glue printing operation. After waiting for the next batch of battery cells to be loaded, the above operation is repeated to achieve quantitative intermittent glue printing operation.

[0059] In the above embodiment, the air inlet channel 204 is opened inside the sealing cover 200 to connect the air inlet hole 206 located on the cover plate 202 and the air charging hole 201 located on the inner wall of the enclosure plate 203. In another embodiment, a double-layer sealing cover 200 structure may also be used, see Figure 5 , Figure 5 It is a schematic cross-sectional structural diagram of another embodiment of the printing glue device of the present application.

[0060] like Figure 5 As shown, the enclosure 203 can be a double-layer structure, and can include an outer plate 2031 and an inner plate 2032. The inflation hole 201 can be set through the inner plate 2032. Correspondingly, the cover plate 202 can also be a double-layer structure. The air inlet hole 206 can be connected to the inflation hole 201 through the inner cavity of the cover plate 202 and the sandwich cavity 205 located between the outer plate 2031 and the inner plate 2032, thereby realizing pressurization inside the cavity 300.

[0061] Of course, in other embodiments, the inflation hole 201 may also be arranged in other ways. For example, the inflation hole 201 may directly penetrate the enclosure 203, and the boost pipe 503 may be directly connected to the inflation hole 201. Alternatively, an air intake box 600 connected to the inflation hole 201 may be arranged outside the enclosure 203, and the boost pipe 503 may be connected to the air intake box 600. Both of these can achieve the effect of the present embodiment.

[0062] The glue printing device based on the above-mentioned embodiments can pressurize the cavity 300 by injecting gas into the cavity 300 through the boosting mechanism 500, and the glue liquid 400 is discharged from the glue hole 103 under pressure to realize the glue printing operation. Since the pressure of the glue holes 103 at various locations is consistent, it can effectively ensure that the size and height of the glue points are small. During subsequent welding, the welding effects of various points on the battery cell are more uniform, and it is easier to make various subsequent adjustments to the defects in the welding stage.

[0063] In addition, by implementing the glue printing operation through the closed container 100, a larger amount of glue liquid 400 can be added to the container 100 at one time, reducing the frequency of manual addition of glue liquid 400, improving production continuity, and preventing the glue liquid 400 from being contaminated, reducing the probability of defects such as foreign matter / bubbles appearing after subsequent component lamination, and improving component yield and reliability.

[0064] For those skilled in the art, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0065] The foregoing description of the specific exemplary embodiments of the present application is for the purpose of illustration and illustration. These descriptions are not intended to limit the present application to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present application and its practical application, so that those skilled in the art can realize and utilize the various exemplary embodiments of the present application and various selections and changes. The scope of the present application is intended to be limited by the claims and their equivalents.

Claims

1. A rubber printing device, characterized in that: include: A container, one side of which is open, wherein a cavity for storing glue is formed in the container, wherein the container comprises a printing rubber plate arranged at one side of the cavity, wherein the printing rubber plate is provided with glue holes communicating with the cavity and the outside; A sealing cover, which is arranged at the opening to seal the cavity, and the sealing cover is provided with an air filling hole connected with the cavity; The pressurizing mechanism comprises an output end connected to the inflation hole, and the pressurizing mechanism is used to inject gas into the cavity through the inflation hole.

2. The rubber printing device according to claim 1, characterized in that: The sealing cover comprises a cover plate and a circle of surrounding plates arranged on the outer edge of the cover plate facing the container, the surrounding plates are in contact with the side wall of the container to seal the cavity, and the inflation holes are arranged on the surrounding plates.

3. The rubber printing device according to claim 2, characterized in that: The inflation hole is arranged on the inner wall of the enclosure plate, the cover plate is provided with an air inlet hole connected with the output end of the supercharging mechanism, and the sealing cover is provided with an air inlet passage connecting the inflation hole and the air inlet hole.

4. The rubber printing device according to claim 3, characterized in that: The enclosure is a double-layer structure, and the enclosure includes an outer layer plate and an inner layer plate, the inflation hole is set through the inner layer plate, and the air intake channel includes a cavity arranged between the outer layer plate and the inner layer plate.

5. The rubber printing device according to claim 3, characterized in that: An air intake box is arranged on a side of the cover plate facing away from the container, an air intake cavity connected to the air intake hole is formed inside the air intake box, and an output end of the boost mechanism is connected to the air intake cavity.

6. The rubber printing device according to claim 5, characterized in that: The boost mechanism comprises a boost pump and a boost pipeline, the output end is arranged at the end of the boost pipeline, and the boost pipeline, the air intake box and the cover plate are integrally formed.

7. The rubber printing device according to claim 2, characterized in that: The enclosure is provided with a plurality of inflation holes distributed on different sides.

8. The rubber printing device according to claim 1, characterized in that: The glue printing device also includes a pressure sensor, which is arranged on the side of the glue printing plate facing the cavity to detect the pressure at the glue hole. The booster mechanism is used to intermittently inject gas into the cavity so that the reading of the pressure sensor gradually increases to a preset threshold value during the glue printing operation and then gradually decreases. The reading of the pressure sensor remains unchanged during the non-glue printing operation.

9. The rubber printing device according to claim 1, characterized in that: A sealing strip is arranged between the sealing cover and the container; and / or, The printing plate is arranged below the cavity.

10. The rubber printing device according to any one of claims 1 to 9, characterized in that: The inflation hole is extended in a direction parallel to the liquid surface of the glue.

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