Flux application device

Abstract

This invention provides a flux application device, including a carrier body, a mounting body, application components, and a driving component. The carrier body supports solar cells. The mounting body is located on the side of the carrier body that supports the solar cells and is spaced apart from the carrier body. At least one application component is provided, each mounted on the side of the mounting body near the carrier body. The driving component is connected to at least one of the carrier body and the mounting body, and is used to drive the mounting body and the carrier body to move closer or further apart. This invention applies flux to each solder joint location using the application components, while leaving adhesive dots untouched. This prevents the thermosetting adhesive at these adhesive dots from coming into contact with the flux, thus avoiding performance degradation of the thermosetting adhesive due to the flux and improving the reliability of the photovoltaic module.

Description

Technical Field

[0001] This utility model relates to the field of battery cell welding technology, and in particular to a flux application device. Background Technology

[0002] In recent years, breakthroughs in photovoltaic module encapsulation technology have driven the rapid development of new photovoltaic modules. Currently, many photovoltaic modules employ a combination of adhesive bonding and welding for interconnection. The advantage of this process is that welding and adhesive curing can occur simultaneously, improving production efficiency. However, flux is typically used in the welding interconnection process, and its use often negatively impacts the performance of thermosetting adhesives, leading to a decline in adhesive properties and consequently affecting the reliability of the bond. In severe cases, this can cause the photovoltaic module to fail. Utility Model Content

[0003] Therefore, it is necessary to provide a flux application device to address the problem that flux can negatively affect the performance of thermosetting adhesives during the current process of welding and interconnecting solar cells, leading to a decline in the performance of thermosetting adhesives and, in severe cases, the reliability failure of photovoltaic modules.

[0004] The technical solution is as follows:

[0005] On one hand, a flux application device is provided, wherein at least one solder joint position and at least one adhesive dot position are provided on the front and / or back of the battery cell, and the solder joint positions and adhesive dot positions located on the same side of the battery cell are staggered. The flux application device includes:

[0006] The support body is used to support the battery cells;

[0007] The mounting body is located on the side of the support body used to support the battery cell, and is spaced apart from the support body;

[0008] At least one application component is provided, each of which is mounted on the side of the mounting body near the support body and is configured to correspond to the solder joint positions on the side of the battery cell away from the support body when the battery cell is placed on the support body, so as to apply flux to the corresponding solder joint positions.

[0009] A driving component is connected in a transmission manner to at least one of the carrier body and the mounting body, and is used to drive the mounting body and the carrier body to move closer to each other or further apart.

[0010] In the flux application device described in the above embodiments, during use, firstly, the solar cell is placed on the support body, and each solder joint on the side of the solar cell away from the support body corresponds one-to-one with each application component. Secondly, the driving component drives the mounting body and the support body closer together until each application component on the mounting body contacts the corresponding solder joint, and flux is applied to each solder joint. Then, the driving component drives the mounting body and the support body away from each other to reset. Finally, the solar cell is flipped over, and the above steps are repeated to apply flux to all solder joints on both the front and back of the solar cell. There is no need to soak the solder ribbon in flux; the flux applied to the solder joints ensures the welding performance between the solder ribbon and the solar cell. Furthermore, since each application component applies flux to each solder joint, no flux is applied to the adhesive dots. The thermosetting adhesive at the adhesive dots does not come into contact with the flux, preventing performance degradation of the thermosetting adhesive due to the flux and improving the reliability of the photovoltaic module.

[0011] The technical solution will be further explained below:

[0012] In one embodiment, the coating assembly includes a coating member for absorbing and coating the flux.

[0013] In one embodiment, the applicator is configured as an applicator sponge, the outline of which is adapted to the outline of the solder joint location.

[0014] In one embodiment, the coating assembly further includes a coating needle, one end of which is mounted on the mounting body near the other side of the carrier body, and the other end is connected to the coating element. The coating needle is used to conduct the flux into the coating element.

[0015] In one embodiment, the applicator further includes an elastic element fitted onto the outer wall of the applicator needle, with both ends of the elastic element connected to the outer wall of the applicator needle and the applicator respectively.

[0016] In one embodiment, the mounting body is located above the carrier body, the mounting body is provided with a liquid storage cavity, and the bottom wall of the liquid storage cavity is provided with at least one liquid distribution hole, each of the liquid distribution holes being connected to each of the application components.

[0017] In one embodiment, the mounting body includes a liquid distribution plate and a mounting plate. The top surface of the liquid distribution plate is provided with at least one liquid distribution hole, the bottom surface of the mounting plate is provided with a liquid storage tank, and the top surface of the mounting plate is provided with a liquid inlet communicating with the liquid storage tank. The liquid distribution plate is mounted on the bottom surface of the mounting plate so that the inner wall of the liquid storage tank and the top surface of the liquid distribution plate form the liquid storage cavity.

[0018] In one embodiment, the mounting body further includes a liquid guide tube, which is installed at the liquid inlet and communicates with the liquid storage chamber.

[0019] In one embodiment, there are two driving components, which are located on opposite sides of the mounting body and are both connected to the mounting body in a transmission manner.

[0020] In one embodiment, the support body has at least one vacuum groove on the side near the mounting body, and each vacuum groove is used to communicate with a vacuum pumping device so that a negative pressure environment can be formed in the vacuum groove to fix the battery cell to the mounting body. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the flux application device and battery cell according to one embodiment.

[0024] Figure 2 for Figure 1 A plan view of the solar cells.

[0025] Figure 3 for Figure 1 Side view of the flux application device and the battery cell.

[0026] Figure 4 for Figure 1 Front view of the flux application device and the battery cell.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Flux application device; 100. Support body; 111. Vacuum tank; 200. Mounting body; 210. Liquid distribution plate; 220. Mounting plate; 230. Liquid guide tube; 300. Application assembly; 310. Application component; 320. Application needle; 330. Elastic component; 400. Driving component; 20. Battery cell; 21. Solder joint position; 22. Adhesive dot position. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] The use of flux during the welding and interconnection of solar cells often negatively impacts the performance of thermosetting adhesives, leading to a decline in adhesive performance and consequently affecting bonding reliability. In severe cases, this can cause photovoltaic module failure. Through research and testing, the inventors discovered that in existing technologies, the solder ribbon must be completely immersed in flux before welding to the solar cells to improve the welding performance between the ribbon and the cells. However, after immersion, flux is distributed across the entire surface of the solder ribbon, causing the thermosetting adhesive to inevitably come into contact with the flux during the bonding and fixing process with the solder ribbon. This results in deterioration of the thermosetting adhesive performance and low reliability of the photovoltaic module.

[0031] Based on this, the flux application apparatus 10 of the present application is designed and proposed in the following embodiments to solve the above-mentioned technical problems.

[0032] like Figure 1 and Figure 2 As shown, in one embodiment, a flux application device 10 is provided for locally applying flux to the battery cell 20.

[0033] The solar cell 20 has at least one solder joint position 21 and at least one adhesive dot position 22 on its front and / or back sides. The solder joint positions 21 and adhesive dot positions 22 located on the same side of the solar cell 20 are staggered.

[0034] It is important to note that the staggered arrangement of the solder joint positions 21 and adhesive dots 22 on the same side of the battery cell 20 means that there is no overlap between all solder joint positions 21 and adhesive dots 22 on the front side of the battery cell 20, and there is no overlap between all solder joint positions 21 and adhesive dots 22 on the back side of the battery cell 20. In other words, there is no overlap between each solder joint position 21 and its adjacent adhesive dot position 22.

[0035] Specifically, in this embodiment, the front and back sides of the battery cell 20 are each provided with at least one solder joint position 21 and at least one adhesive dot position 22. Each solder joint position 21 and its adjacent adhesive dot position 22 are spaced apart. All solder joint positions 21 on the front side of the battery cell 20, all solder joint positions 21 on the back side of the battery cell 20, all adhesive dot positions 22 on the front side of the battery cell 20, and all adhesive dot positions 22 on the back side of the battery cell 20 are distributed in a rectangular array.

[0036] The flux application device 10 includes a support body 100, a mounting body 200, application components 300, and a drive unit 400. The support body 100 supports the battery cell 20. The mounting body 200 is located on the side of the support body 100 that supports the battery cell 20 and is spaced apart from the support body 100. There is at least one application component 300. Each application component 300 is mounted on the side of the mounting body 200 closest to the support body 100 and is configured to correspond to a solder joint position 21 on the side of the battery cell 20 away from the support body 100 when the battery cell 20 is placed on the support body 100, so as to apply flux to the corresponding solder joint positions 21. The drive unit 400 is drively connected to at least one of the support body 100 and the mounting body 200 and is used to drive the mounting body 200 to move closer to or further away from the support body 100.

[0037] In the above embodiment, the flux application device 10 is used as follows: First, the battery cell 20 is placed on the support body 100, and the solder joint positions 21 on the side of the battery cell 20 away from the support body 100 correspond one-to-one with the application components 300. Next, the drive unit 400 drives the mounting body 200 and the support body 100 closer together until each application component 300 on the mounting body 200 contacts the corresponding solder joint position 21, and flux is applied to each solder joint position 21. Then, the drive unit 400 drives the mounting body 200 and the support body 100 away from each other to reset. Finally, the battery cell 20 is flipped over, and the above steps are repeated to apply flux to all solder joint positions 21 on both the front and back sides of the battery cell 20. There is no need to soak the solder ribbon in flux; the flux applied to the solder joint positions 21 is sufficient to ensure the welding performance between the solder ribbon and the battery cell 20. In addition, each coating component 300 applies flux to each solder joint position 21, but does not apply flux to each adhesive dot position 22. The thermosetting adhesive at the adhesive dot position 22 will not come into contact with the flux, thus avoiding the thermosetting adhesive from being affected by the flux and degrading its performance, thereby improving the reliability of the photovoltaic module.

[0038] The support body 100 can be configured as a support platform, support plate, or other support structure. The positions of the support body 100 and the mounting body 200 can be flexibly adjusted according to actual usage needs. The number of application components 300 can also be flexibly adjusted according to actual usage needs.

[0039] like Figure 3 As shown, the coating assembly 300 further includes a coating member 310. The coating member 310 is used to absorb and apply flux. In this way, the coating member 310 fully absorbs flux before contacting the solder joint position 21 on the battery cell 20, and the flux does not drip onto the battery cell 20. When the coating member 310 contacts the solder joint position 21 on the battery cell 20, it can release the flux under the action of extrusion pressure and apply the flux to the solder joint position 21, thereby improving the practicality of the flux coating device 10.

[0040] The applicator 310 can be configured as an applicator sponge, applicator cloth, or other applicator structure.

[0041] Optionally, the applicator 310 is configured as an applicator sponge. The outline shape of the applicator sponge is adapted to the outline shape of the solder joint position 21. In this way, the applicator sponge can accurately apply flux to the entire solder joint position 21 while also acting as a buffer to prevent damage to the battery cell 20 due to excessive pressure, thereby improving the reliability of the flux application device 10.

[0042] like Figure 3 As shown, in one embodiment, the coating assembly 300 further includes a coating needle 320. One end of the coating needle 320 is mounted on the side of the mounting body 200 near the support body 100, and the other end is connected to the coating element 310. The coating needle 320 is used to conduct flux into the coating element 310. In this way, the coating needle 320 can continuously conduct flux into the coating element 310, enabling the coating element 310 to perform continuous coating operations and improving the coating efficiency of the flux coating device 10.

[0043] In this specific embodiment, the end of the applicator needle 320 furthest from the mounting body 200 is inserted into the interior of the applicator 310. This increases the contact area between the applicator needle 320 and the applicator 310, ensuring that the applicator 310 can fully and evenly absorb the flux transferred from the applicator needle 320, thereby improving the applicator effect of the flux applicator 10.

[0044] It should be noted that the end of each applicator needle 320 near the mounting body 200 is connected to a device or structure capable of providing flux. In other embodiments, the applicator assembly 300 may not have applicator needles 320. Instead, the applicator 310 can absorb a certain amount of flux, allowing it to cyclically perform flux absorption and replenishment, as well as flux application. That is, after applying flux a preset number of times, the applicator 310 will perform flux absorption and replenishment once.

[0045] like Figure 3 As shown, optionally, the coating assembly 300 also includes an elastic element 330. The elastic element 330 is sleeved on the outer wall of the coating needle 320. The two ends of the elastic element 330 are connected to the outer wall of the coating needle 320 and the coating element 310, respectively. In this way, the elastic element 330 can buffer the extrusion force when the coating element 310 contacts and presses against the solder joint position 21, ensuring that the battery cell 20 is not damaged due to excessive extrusion force. The elastic element 330 can also drive the coating element 310 to reset after it separates from the solder joint position 21, ensuring that the coating needle 320 can conduct flux to the coating element 310, thereby improving the reliability of the flux coating device 10.

[0046] The elastic element 330 can be configured as a spring, an elastic sleeve, or other elastic structure.

[0047] like Figure 4 As shown, in one embodiment, the mounting body 200 is located above the support body 100. The mounting body 200 is provided with a liquid storage chamber, and the bottom wall of the liquid storage chamber is provided with at least one dispensing hole, each dispensing hole corresponding to and communicating with each application component 300. In this way, the mounting body 200 can provide flux to the application components 300, enabling the application components 300 to continuously work and improving the application efficiency of the flux application device 10.

[0048] In this specific embodiment, each dispensing hole is connected to the end of each applicator needle 320 that is away from the carrier body 100.

[0049] like Figure 4 As shown, the mounting body 200 further includes a liquid distribution plate 210 and a mounting plate 220. The top surface of the liquid distribution plate 210 has at least one liquid distribution hole. The bottom surface of the mounting plate 220 has a liquid storage tank, and the top surface of the mounting plate 220 has a liquid inlet communicating with the liquid storage tank. The liquid distribution plate 210 is mounted on the bottom surface of the mounting plate 220 so that the inner wall of the liquid storage tank and the top surface of the liquid distribution plate 210 form a liquid storage cavity. Thus, by pre-processing the liquid distribution hole on the liquid distribution plate 210 and the liquid storage tank and liquid inlet on the mounting plate 220, and then assembling the liquid distribution plate 210 and the mounting plate 220 into a single unit, the ease of processing the mounting body 200 is improved.

[0050] like Figure 4 As shown, optionally, the mounting body 200 also includes a liquid guide tube 230. The liquid guide tube 230 is installed at the liquid inlet and communicates with the liquid storage chamber. In this way, the liquid guide tube 230 can serve as a connector to facilitate communication with a flux supply device to add flux into the liquid storage chamber, thereby improving the practicality of the flux application device 10.

[0051] like Figure 4 As shown, in one embodiment, there are two drive members 400. The two drive members 400 are located on opposite sides of the mounting body 200 and are both connected to the mounting body 200 in a transmission manner. Thus, by providing drive members 400 on both sides of the mounting body 200, the driving force on the mounting body 200 is evenly distributed when applying flux, ensuring that the mounting body 200 can stably and reliably drive each application component 300 to reciprocate along the direction approaching or away from the support body 100, thereby accurately and reliably applying flux to the corresponding solder joint positions 21 and improving the reliability of the flux application device 10.

[0052] The number and installation position of the drive components 400 can be flexibly adjusted according to actual usage needs. The drive components 400 can be configured as telescopic cylinders, telescopic motors, or other linear drive structures.

[0053] like Figure 1 As shown, in one embodiment, the support body 100 has at least one vacuum groove 111 on the side near the mounting body 200. Each vacuum groove 111 is connected to a vacuum pumping device, so that a negative pressure environment can be formed within the vacuum groove 111 to fix the battery cell 20 to the mounting body 200. In this way, the battery cell 20 can be stably and reliably fixed on the support body 100, and the solder joint positions 21 on the side of the battery cell 20 away from the support body 100 are kept in corresponding positions with the respective application components 300. This ensures that each application component 300 can accurately apply flux to the corresponding solder joint positions 21, improving the reliability of the flux application device 10.

[0054] Optionally, the carrier body 100 is provided with a limiting part. The limiting part is used to limit and cooperate with the battery cell 20 so that the positions 21 of each solder joint on the side of the battery cell 20 away from the carrier body 100 are aligned with each coating component 300.

[0055] The limiting part can be set as a limiting column, a limiting rib, or other limiting structure.

[0056] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, 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 possible implementation.

[0061] It should also be understood that, in interpreting the connection or positional relationships of components, although not explicitly described, connection and positional relationships are interpreted to include a range of error, which should be within the acceptable deviation range of a specific value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0063] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A flux application device characterized by, At least one soldering point position (21) and at least one glue point position (22) are arranged on the front surface and / or the back surface of the battery piece (20), each soldering point position (21) and each glue point position (22) are arranged at different positions on the same side of the battery piece (20), and the flux applying device (10) comprises: a bearing body (100) for bearing the battery piece (20); a mounting body (200) arranged at a side of the bearing body (100) for bearing the battery piece (20) and spaced apart from the bearing body (100); at least one applying assembly (300) mounted on the mounting body (200) close to the bearing body (100) and arranged to correspond to each soldering point position (21) on the side of the battery piece (20) away from the bearing body (100) when the battery piece (20) is placed on the bearing body (100) so as to apply flux to each corresponding soldering point position (21); a driving member (400) in transmission connection with at least one of the bearing body (100) and the mounting body (200) and used to drive the mounting body (200) and the bearing body (100) to move closer to or farther away from each other.

2. The flux applicator of claim 1, wherein The applying assembly (300) comprises an applying member (310) for absorbing and applying the flux.

3. The flux applicator of claim 2, wherein The applying member (310) is arranged as an applying sponge with a contour shape matched with that of the soldering point position (21).

4. The flux applicator of claim 2, wherein The applying assembly (300) further comprises an applying needle (320) with one end mounted on the other side of the mounting body (200) close to the bearing body (100) and the other end connected with the applying member (310), and the applying needle (320) is used to conduct the flux into the applying member (310).

5. The flux applicator of claim 4, wherein The applying assembly (300) further comprises an elastic member (330) sleeved on the outer sidewall of the applying needle (320), and both ends of the elastic member (330) are connected with the outer sidewall of the applying needle (320) and the applying member (310), respectively.

6. The flux applicator device according to any one of claims 1 to 5, characterized in that The mounting body (200) is arranged above the bearing body (100), and the mounting body (200) is provided with a liquid storage cavity, the bottom wall of the liquid storage cavity is provided with at least one liquid distribution hole, and each liquid distribution hole is in communication with each applying assembly (300).

7. The flux applicator of claim 6, wherein The mounting body (200) comprises a liquid distribution plate (210) and a mounting plate (220), the top surface of the liquid distribution plate (210) is provided with at least one liquid distribution hole, the bottom surface of the mounting plate (220) is provided with a liquid storage groove, the top surface of the mounting plate (220) is provided with a liquid inlet in communication with the liquid storage groove, and the liquid distribution plate (210) is mounted on the bottom surface of the mounting plate (220) so that the inner wall of the liquid storage groove and the top surface of the liquid distribution plate (210) form the liquid storage cavity.

8. The flux applicator of claim 7, wherein The mounting body (200) further comprises a liquid guide pipe (230) installed at the liquid inlet and communicating with the liquid storage cavity.

9. The flux applicator device according to any one of claims 1 to 5, characterized in that The number of the driving members (400) is two, and the two driving members (400) are respectively located at two sides of the mounting body (200) and are in driving connection with the mounting body (200).

10. The flux applicator device according to any one of claims 1 to 5, characterized in that The side of the bearing body (100) close to the mounting body (200) is provided with at least one vacuum groove (111), and each vacuum groove (111) is used for communicating with a vacuumizing device, so that a negative pressure environment can be formed in the vacuum groove (111) to fix the battery piece (20) on the mounting body (200).

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