Glue filling method and glue filling device

Abstract

The invention provides a glue filling method and a glue filling device. The glue filling method comprises the following steps that a first floating part and a second floating part are suspended in a first glue filling area in a glue filling container and a second glue filling area located on one side of the first glue filling area respectively, and the bottom end of the first floating part and the bottom end of the second floating part are both located below a glue filling face in the glue filling container; pouring a glue solution into the first glue pouring area, stopping pouring the glue solution into the first glue pouring area when the buoyancy borne by the first floating part is greater than 0, and starting pouring the glue solution into the second glue pouring area until the buoyancy borne by the second floating part is greater than 0; and supplementing glue liquid into the first glue filling area and the second glue filling area until the glue liquid reaches the glue filling surface. According to the glue filling method, the hysteresis problem existing in the traditional technology can be avoided, and in-situ monitoring of the amount of the filled glue liquid is realized, so that the glue filling yield is improved.

Description

Technical Field

[0001] This invention relates to the field of glue dispensing technology, and more particularly to a glue dispensing method and glue dispensing apparatus. Background Technology

[0002] In electronic packaging processes, potting is a common method for protecting and enhancing the stability of electronic components. For example, the junction boxes of photovoltaic modules require potting during production. The main purpose of potting is to provide physical protection for the electronic components within the junction box, preventing damage from mechanical shocks, vibrations, thermal stress, and environmental factors such as moisture, dust, and chemical corrosion. Furthermore, potting can also help improve the heat dissipation performance of electronic components.

[0003] In the potting process, the accuracy of the potting adhesive directly affects the reliability of the encapsulation. Traditional techniques typically use visual analysis to detect the amount of adhesive poured after it has been poured into the container. For example, a CCD camera might capture an image of the adhesive surface, which is then sent to an image acquisition unit and processed, analyzed, and identified by a computer. However, in practical applications, this visual analysis method has a certain lag compared to the potting process itself, leading to occasional potting defects. Summary of the Invention

[0004] Therefore, it is necessary to provide a glue-filling method that can improve the glue-filling yield, addressing the problems mentioned in the background art.

[0005] According to some embodiments of this disclosure, a potting method is provided, which includes the following steps:

[0006] The first floating component and the second floating component are respectively suspended in the first dispensing area and the second dispensing area located on one side of the first dispensing area in the dispensing container. The bottom ends of the first floating component and the second floating component are both located below the dispensing surface in the dispensing container.

[0007] Glue is injected into the first glue-filling area. When the buoyancy force on the first floating component is greater than 0, the injection of glue into the first glue-filling area is stopped, and the injection of glue into the second glue-filling area begins until the buoyancy force on the second floating component is greater than 0; and,

[0008] Add adhesive to the first and second glue-filling areas until the glue reaches the glue-filling surface.

[0009] In some embodiments of this disclosure, the top end of the first floating member is located above the potting surface; and / or,

[0010] The top of the second floating component is located above the glue-filling surface.

[0011] In some embodiments of this disclosure, during the step of replenishing adhesive into the dispensing container, the total buoyancy of the first floating member and the second floating member is monitored to determine whether the adhesive in the dispensing container reaches the dispensing surface.

[0012] In some embodiments of this disclosure, the ratio of the volume of the first floating member below the potting surface to the total volume of the first floating member is (0.5~0.8):1; and / or,

[0013] The ratio of the volume of the second floating component below the glue-filling surface to the total volume of the second floating component is (0.5~0.8):1.

[0014] In some embodiments of this disclosure, during the step of replenishing the adhesive into the dispensing container, the adhesive is poured toward the area between the first floating member and the second floating member.

[0015] In some embodiments of this disclosure, during the step of replenishing the glue container with glue, the glue nozzle for dispensing the glue is controlled to reciprocate between the first floating member and the second floating member, and the glue is continuously dispensed during the reciprocating movement of the glue nozzle.

[0016] In some embodiments of this disclosure, a plurality of first floating members are suspended at intervals in the first glue-filling area, and in the step of filling the first glue-filling area with glue, the glue is filled from between the plurality of first floating members toward the first glue-filling area; and / or,

[0017] The plurality of second floating members are suspended at intervals in the second glue-filling area. In the step of filling the second glue-filling area with glue, the glue is filled from between the plurality of second floating members toward the second glue-filling area.

[0018] In some embodiments of this disclosure, each of the first floating members is disposed close to the side wall of the dispensing container, and each of the second floating members is disposed close to the side wall of the dispensing container.

[0019] In some embodiments of this disclosure, the glue-filling container has two first sidewalls and two second sidewalls arranged in parallel, the first sidewalls being longer than the second sidewalls, the glue-filling container having a central surface parallel to the second sidewalls, and the first glue-filling area and the second glue-filling area being located on both sides of the central surface, respectively.

[0020] At least three of the first floating elements are suspended in the first glue-filling area, wherein two of the first floating elements are respectively close to the two first sidewalls, and one of the first floating elements is close to one of the second sidewalls;

[0021] At least three second floating elements are suspended in the second glue-filling area, wherein two of the second floating elements are respectively close to the two first sidewalls, and one of the second floating elements is close to the other second sidewall.

[0022] In some embodiments of this disclosure, the potting container is a photovoltaic module junction box.

[0023] This disclosure also provides a dispensing device for performing the dispensing method as described in any of the above embodiments, comprising: a first floating member, a second floating member, a dispensing tube, a tensile testing mechanism, and a control mechanism, wherein the first floating member and the second floating member are both suspended and connected to the tensile testing mechanism, and the first floating member and the second floating member are spaced apart, and the first floating member and the second floating member are respectively disposed in a first dispensing area and a second dispensing area of ​​a dispensing container;

[0024] The tensile testing mechanism is used to measure the tensile force applied by the first floating component and the second floating component, and the control mechanism is used to control the glue dispensing tube to dispense glue towards the first glue dispensing area and the second glue dispensing area according to the tensile force received by the tensile testing mechanism.

[0025] In some embodiments of this disclosure, the tensile testing mechanism includes a connecting bracket and a spring tension gauge, wherein the first floating member and the second floating member are both suspended and connected to the bottom end of the connecting bracket, and the spring tension gauge is connected to the top end of the connecting bracket.

[0026] In some embodiments of this disclosure, the spring tension gauge includes a plurality of springs, the plurality of springs being spaced apart and all connected to the top end of the connecting bracket; and / or,

[0027] The connecting bracket is ring-shaped, and the glue-filling tube is disposed inside the ring of the connecting bracket; and / or,

[0028] Both the first floating component and the second floating component are spherical.

[0029] In some embodiments of this disclosure, there are at least three first floating elements, wherein the three first floating elements are respectively located at the three vertices of an isosceles triangle; and / or,

[0030] There are at least three second floating elements, and the three second floating elements are located at the three vertices of another isosceles triangle.

[0031] In this dispensing method, the dispensing container is divided into a first dispensing zone and a second dispensing zone, and a first floating element and a second floating element are respectively installed in the first and second dispensing zones. During the dispensing process, the dispensing liquid is successively poured into the first and second dispensing zones, and the buoyancy of the first and second floating elements is used as a signal to stop dispensing the liquid. Since the buoyancy of the first and second floating elements is directly related to the amount of dispensing liquid and is a real-time feedback, this dispensing method can avoid the lag problem existing in traditional technologies, realize in-situ monitoring of the amount of dispensing liquid, and thus improve the dispensing yield.

[0032] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this disclosure, 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 disclosure. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a dispensing device disclosed herein;

[0035] Figure 2 for Figure 1 A schematic diagram of the front cross-section structure in the diagram;

[0036] Figure 3 for Figure 1 A schematic diagram of the side cross-section structure in the diagram;

[0037] Figure 4 This is a schematic diagram of the steps of a glue-pouring method.

[0038] The reference numerals and their meanings in the attached figures are as follows:

[0039] 110. First floating component; 120. Second floating component; 130. Tensile testing mechanism; 131. Spring tension gauge; 132. Connecting bracket; 140. Dispensing tube; 200. Dispensing container; 201. First dispensing area; 202. Second dispensing area; 203. Dispensing surface; 210. First sidewall; 220. Second sidewall. Detailed Implementation

[0040] To facilitate understanding of this document, a more comprehensive description will be provided below. Preferred embodiments are given herein. However, this document can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the content of this document more thorough and comprehensive.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this applies. The terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the document.

[0042] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or parts, these elements, components, areas, layers, and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or part from another element, component, area, layer, or part.

[0043] Spatial relation terms such as “below,” “under,” “below,” “below,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship of one element or feature to other elements or features. It should be understood that spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, then the element or feature described as “below,” “below,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. Devices may be oriented in other ways (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used will be interpreted accordingly.

[0044] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprise” and / or “comprising,” when used in this specification, identify the presence of features, integers, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0045] Traditional visual analysis methods typically only detect the amount of adhesive poured into the container to determine if there is overflow or insufficient adhesive. However, this method is performed after the adhesive has been poured, which introduces a certain lag compared to the pouring process. Furthermore, visual analysis usually requires computer equipment to perform machine learning, and the learning curve or occasional anomalies can lead to inaccurate analysis results.

[0046] This disclosure provides a glue-filling method, comprising the following steps: suspending a first floating member and a second floating member respectively in a first glue-filling area and a second glue-filling area located to one side of the first glue-filling area within a glue-filling container, wherein the bottom ends of both the first and second floating members are below the glue-filling surface. Glue is poured into the first glue-filling area; when the buoyancy force on the first floating member is greater than 0, the pouring of glue into the first glue-filling area is stopped, and glue is poured into the second glue-filling area until the buoyancy force on the second floating member is greater than 0. Then, glue is added to the first and second glue-filling areas until it reaches the glue-filling surface.

[0047] It is understood that in the dispensing method disclosed herein, the dispensing container is divided into a first dispensing area and a second dispensing area, and a first floating element and a second floating element are respectively provided in the first dispensing area and the second dispensing area. When dispensing the adhesive, the adhesive is first dispensed into the first dispensing area. When the buoyancy force on the first floating element is greater than 0, it indicates that the adhesive has contacted the bottom of the first floating element and is about to reach the dispensing surface. At this point, dispensing of adhesive into the first dispensing area is stopped, and dispensing is redirected to the second dispensing area to prevent adhesive overflow from the first dispensing area. When the buoyancy force on the second floating element is greater than 0, it indicates that the adhesive has contacted the bottom of the second floating element. At this point, dispensing of adhesive into the second dispensing area is paused. Then, adhesive is replenished until the dispensing surface is reached.

[0048] In this glue-filling method, glue is successively poured into the first glue-filling area and the second glue-filling area, and the buoyancy of the first and second floating components is used as the signal to stop the glue pouring. Since the buoyancy of the first and second floating components is directly related to the amount of glue poured and is a real-time feedback, this glue-filling method can avoid the lag problem existing in traditional technologies, realize in-situ monitoring of the amount of glue poured, and also has significantly higher accuracy.

[0049] To facilitate a clearer understanding of the operation of the glue-dispensing method in this disclosure, a glue-dispensing device provided in this disclosure will be described below.

[0050] Figure 1 This is a schematic diagram of the structure of a glue-dispensing device disclosed herein. Figure 2 for Figure 1 A front view cross-sectional diagram of the dispensing device. Figure 3 for Figure 1 A side view cross-sectional diagram of the dispensing device. (Combined with...) Figures 1-3 As shown, the dispensing device of this disclosure includes a first floating member 110, a second floating member 120, a dispensing tube 140, a tensile testing mechanism 130, and a control mechanism (not shown in the figure). Both the first floating member 110 and the second floating member 120 are suspended and connected to the tensile testing mechanism 130, and the first floating member 110 and the second floating member 120 are spaced apart. The tensile testing mechanism 130 is used to measure the tensile force applied by the first floating member 110 and the second floating member 120, and the control mechanism is used to control the movement of the dispensing tube 140 according to the tensile force applied by the first floating member 110 and the second floating member 120.

[0051] The first floating member 110 and the second floating member 120 are respectively disposed in the first dispensing area 201 and the second dispensing area 202 of the dispensing container 200, and the control mechanism is used to control the dispensing tube 140 to dispense glue toward the first dispensing area 201 and the second dispensing area 202 according to the tensile force received by the tensile testing mechanism 130.

[0052] As some examples of this embodiment, the control mechanism is used to control the dispensing tube 140 to stop dispensing adhesive into the first dispensing area 201 when the buoyancy force on the first floating member 110 is greater than 0, and to start dispensing adhesive into the second dispensing area 202 until the buoyancy force on the second floating member 120 is greater than 0.

[0053] As some examples of this embodiment, the control mechanism is also used to control the dispensing tube 140 to replenish adhesive into the dispensing container 200 until the dispensing surface 203 is reached.

[0054] As some examples of this embodiment, the control mechanism may include, but is not limited to, a programmable logic controller and a computer.

[0055] As some examples of this embodiment, the dispensing container 200 may have a central surface along the height direction, with two halves of the dispensing container 200 on either side of the central surface. The first dispensing area 201 and the second dispensing area 202 may be located in the two halves, respectively, or the two halves may directly serve as the first dispensing area 201 and the second dispensing area 202.

[0056] Reference Figure 1 As shown, the first floating member 110 and the second floating member 120 can be connected to the tensile testing mechanism 130 by a suspension rope, thereby realizing the suspension connection between the first floating member 110 and the second floating member 120 and the tensile testing mechanism 130 respectively.

[0057] Combination Figure 1 and Figure 2 As shown, with Figure 2 The area located to the left of the center plane of the glue container 200 is the first glue-filling area 201, and the area located to the right of the center plane of the glue container 200 is the second glue-filling area 202. A first floating member 110 is disposed in the first glue-filling area 201, and a second floating member 120 is disposed in the second glue-filling area 202. Since both the first floating member 110 and the second floating member 120 are suspended and connected to the tensile testing mechanism 130, the first floating member 110 and the second floating member 120 are respectively suspended in the first glue-filling area 201 and the second glue-filling area 202 of the glue container 200.

[0058] As some examples of this embodiment, both the first floating member 110 and the second floating member 120 are spherical. It is understood that in other examples, the first floating member 110 and the second floating member 120 may also be other regular or irregular shapes, as long as they can displace the adhesive and be subjected to the corresponding buoyancy.

[0059] As some examples of this embodiment, the mass of the first floating member 110 is the same as the mass of the second floating member 120. This makes the gravity acting on the first floating member 110 and the second floating member 120 the same, enabling them to maintain a relatively stable state when suspended.

[0060] As some examples of this embodiment, the first floating member 110 and the second floating member 120 have the same volume. This makes the volume of adhesive that the first floating member 110 and the second floating member 120 can displace when immersed in adhesive the same, thereby making the buoyancy that the first floating member 110 and the second floating member 120 can experience the same, improving the accuracy of the amount of adhesive during dispensing.

[0061] As examples of this embodiment, the materials of the first floating member 110 and the second floating member 120 can each be independently selected from metals, such as corrosion-resistant materials like stainless steel, copper, and aluminum. The first floating member 110 and the second floating member 120 can be solid or hollow.

[0062] As examples of this embodiment, the bottom ends of the first floating member 110 and the second floating member 120 are flush. Furthermore, the top ends of the first floating member 110 and the second floating member 120 are also flush. Here, "flush" means that they are located on the same horizontal plane.

[0063] Reference Figure 1 As shown, as examples of this embodiment, the dispensing device may include multiple first floating elements 110, for example, three or more first floating elements 110. All the multiple first floating elements 110 are suspended in the first dispensing area 201 of the dispensing container 200. Each first floating element 110 can serve as a liquid level detection point in the first dispensing area 201; that is, when the surface of the adhesive begins to contact any first floating element 110, it will cause that first floating element 110 to generate buoyancy. This can reduce the error caused by height differences due to slow liquid flow velocity and improve the accuracy of the liquid level monitoring results by the first floating elements 110.

[0064] Reference Figure 1 As shown, as some examples of this embodiment, the dispensing device may include a plurality of second floating elements 120, for example, more than three second floating elements 120. All of the second floating elements 120 are suspended in the second dispensing area 202 of the dispensing container 200. This improves the accuracy of the liquid level monitoring results by the second floating elements 120.

[0065] Combination Figures 1-3 As shown, in this embodiment, the dispensing container 200 has two parallel first sidewalls 210 (e.g., Figure 1 The long sidewalls) and two parallel second sidewalls 220 (e.g. Figure 1 (The shorter sidewall in the middle). The first sidewall 210 is longer than the second sidewall 220. The glue container 200 has a central plane parallel to the second sidewall 220, and the first glue-filling area 201 and the second glue-filling area 202 are located on both sides of the central plane.

[0066] As examples of this embodiment, there are at least three first floating members 110. Of the three first floating members 110, two are respectively disposed close to two first sidewalls 210, and one is disposed close to a second sidewall 220. This allows the first floating members 110 to more accurately detect the level of adhesive at the inner wall of the dispensing container 200, thereby more effectively preventing adhesive overflow.

[0067] As a further example of this embodiment, the three first floating members 110 are respectively located at the three vertices of an isosceles triangle. This makes the distribution of the first floating members 110 more uniform, which can improve the accuracy of the first floating members 110 in detecting the liquid level. During the process of filling the first glue-filling area 201 with glue, the glue can be filled towards the inside of the isosceles triangle or the center point of the base of the isosceles triangle.

[0068] As some examples of this embodiment, there are at least three second floating members 120. Among the three second floating members 120, two second floating members 120 are respectively disposed close to two first side walls 210, and one second floating member 120 is disposed close to another second side wall 220.

[0069] As a further example of this embodiment, the three second floating members 120 are respectively located at the three vertices of an isosceles triangle. This makes the distribution of the second floating members 120 more uniform, which can improve the accuracy of the second floating members 120 in detecting the liquid level. During the process of filling the second glue-filling area 202 with glue, the glue can be filled towards the inside of the isosceles triangle or the center point of the base of the isosceles triangle.

[0070] Furthermore, referring to Figures 1-3 As shown, the first floating member 110 and the second floating member 120 are arranged in a mirror-symmetrical manner along the central plane of the dispensing container 200.

[0071] Reference Figures 1-3 As shown, as examples of this embodiment, the tensile testing mechanism 130 includes a connecting bracket 132 and a spring tension gauge 131. The first floating member 110 and the second floating member 120 are both suspended from the bottom end of the connecting bracket 132, and the spring tension gauge 131 is connected to the top end of the connecting bracket 132. Using the connecting bracket 132 as a transfer mechanism between the first floating member 110, the second floating member 120, and the spring tension gauge 131 can maintain the balance and stability of the first floating member 110 and the second floating member 120 during glue application. In other examples, the first floating member 110 and the second floating member 120 can also be connected to a tensile testing gauge respectively to test the tensile force of the first floating member 110 and the second floating member 120.

[0072] In this example, by simultaneously connecting the first floating member 110 and the second floating member 120 to a tensile testing mechanism 130, the structural design of the device can be simplified, and the tensile test results will not be significantly affected.

[0073] As an example of this embodiment, the connecting bracket 132 is annular, and the dispensing tube 140 is disposed inside the ring of the connecting bracket 132. It can be understood that setting the connecting bracket 132 as annular provides a certain amount of movement space for the dispensing tube 140, thereby facilitating the dispensing tube 140 to inject adhesive into the first dispensing area 201 and the second dispensing area 202 at different times.

[0074] As examples of this embodiment, the spring force gauge 131 includes multiple springs, which are spaced apart and all connected to the top of the connecting bracket 132. For example, the spring force gauge 131 includes more than three springs, which helps to buffer the tension on the connecting bracket 132 from the first floating member 110 and the second floating member 120, maintaining the balance and stability of the connecting bracket 132. It is understood that in actual testing, the total tension can be obtained by simultaneously testing the deformation of multiple springs.

[0075] It is understood that electronic components may be housed in the potting container 200, and after potting, the electronic components are submerged in the adhesive to encapsulate them. As an example of this embodiment, the potting container 200 may be a junction box for a photovoltaic module. The junction box is used to connect to the busbar of the photovoltaic module and to discharge the current inside the photovoltaic module.

[0076] like Figures 1-3 The dispensing apparatus shown can be used to implement the dispensing method of this disclosure. Figure 4 This is a schematic diagram illustrating the steps of a glue-pouring method. (Refer to...) Figure 4 As shown, the potting method includes the following steps S1 to S4.

[0077] Step S1: Suspend the first floating member 110 and the second floating member 120 in the glue dispensing container 200 respectively.

[0078] Combination Figures 1-3 As shown, the glue container 200 has a first glue-filling area 201 and a second glue-filling area 202 located on one side of the first glue-filling area 201. The glue container 200 has a preset glue-filling surface 203. The bottom ends of the first floating member 110 and the second floating member 120 are both located below the glue-filling surface 203, and the first floating member 110 and the second floating member 120 are respectively disposed in the first glue-filling area 201 and the second glue-filling area 202. The glue-filling surface 203 refers to the horizontal plane that the glue liquid should reach after glue filling in the glue container 200. The specific location of the glue-filling surface 203 can be set according to actual needs. Generally speaking, the glue-filling surface 203 should be located below the top of the glue container 200.

[0079] As some examples of this embodiment, the density of the first floating member 110 and the density of the second floating member 120 are both greater than the density of the adhesive to be injected. This ensures that the first floating member 110 and the second floating member 120 can be gradually submerged by the adhesive, avoiding the first floating member and the second floating member from floating on the adhesive, which is beneficial to obtaining more accurate measurement results.

[0080] As some examples of this embodiment, the bottom end of the first floating member 110 and the bottom end of the second floating member 120 are located on the same horizontal plane. In other examples, the bottom end of the first floating member 110 may be higher or lower than the bottom end of the second floating member 120, as long as it can be used to detect the position of the adhesive surface during dispensing.

[0081] Combination Figures 1-3 As shown, as some examples of this embodiment, the height difference between the glue-filling surface 203 and the bottom wall of the glue-filling container 200 is h0, the height difference between the bottom end of the first floating member 110 and the bottom wall of the glue-filling container 200 is h1, and the height difference between the bottom end of the second floating member 120 and the bottom wall of the glue-filling container 200 is also h1, so h1 < h0, so that the bottom end of the first floating member 110 and the bottom end of the second floating member 120 are located below the glue-filling surface 203.

[0082] As some examples of this embodiment, the top of the first floating member 110 is located above the glue-filling surface 203. This helps to reduce the volume of glue occupied by the first floating member 110, thereby reducing glue-filling errors. On the other hand, it also helps to determine whether the glue in the glue-filling container 200 has reached the glue-filling surface when the glue is replenished later.

[0083] As some examples of this embodiment, the top of the second floating member 120 is located above the potting surface 203.

[0084] Combination Figures 1-3 As shown, as some examples of this embodiment, the height difference between the top of the first floating member 110 and the bottom wall of the glue container 200 is h2, and the height difference between the top of the second floating member 120 and the bottom wall of the glue container 200 is also h2, so h2 > h0, so that the top of the first floating member 110 and the top of the second floating member 120 are located above the glue surface 203.

[0085] Combination Figures 1-3 As shown, it can be understood that the distance between the bottom end of the first floating member 110 and / or the bottom end of the second floating member 120 and the potting surface 203 is h0-h1. As some examples of this embodiment, the distance between the bottom end of the first floating member 110 and / or the bottom end of the second floating member 120 and the potting surface 203 can be 0.5mm to 3mm. This distance range can minimize the problem of glue overflow or insufficient glue during the potting process.

[0086] Combination Figures 1-3 As shown, it can be understood that the distance between the top of the first floating member 110 and / or the top of the second floating member 120 and the potting surface 203 is h2-h0. As some examples of this embodiment, the distance between the top of the first floating member 110 and / or the top of the second floating member 120 and the potting surface 203 can be 0.5mm to 3mm.

[0087] As some examples of this embodiment, the ratio of the volume of the first floating member 110 below the potting surface 203 to the total volume of the first floating member 110 is (0.5~0.8):1. For example, the ratio of the volume of the first floating member 110 below the potting surface 203 to the total volume of the first floating member 110 can be 0.5:1, 0.55:1, 0.6:1, 0.65:1, 0.7:1, 0.75:1, 0.8:1, or the volume ratio can be between any two of the above ratios.

[0088] As some examples of this embodiment, the ratio of the volume of the second floating member 120 below the potting surface to the total volume of the second floating member 120 is (0.5~0.8):1. For example, the ratio of the volume of the second floating member 120 below the potting surface to the total volume of the second floating member 120 can be 0.5:1, 0.55:1, 0.6:1, 0.65:1, 0.7:1, 0.75:1, 0.8:1, or the volume ratio can be between any two of the above ratios.

[0089] Combination Figures 1-3 As shown, as some examples of this embodiment, multiple first floating members 110 can be suspended at intervals in the first glue-filling area 201.

[0090] In this example, each of the first floating members 110 is positioned close to the side wall of the dispensing container 200.

[0091] Furthermore, in this example, at least three first floating members 110 can be suspended in the first glue-filling area 201, wherein two first floating members 110 are respectively close to the two first sidewalls 210, and one first floating member 110 is close to the second sidewall 220. For ease of explanation, the first floating member 110 close to the second sidewall 220 is referred to as first floating member 110, and the two first floating members 110 close to the two first sidewalls 210 are referred to as first floating member 210 and first floating member 310, respectively.

[0092] Combination Figures 1-3 As shown, as some examples of this embodiment, multiple second floating members 120 can be suspended at intervals in the second glue-filling area 202.

[0093] In this example, each of the second floating members 120 is positioned close to the side wall of the dispensing container 200.

[0094] Furthermore, in this example, at least three second floating elements 120 can be suspended in the second glue-filling area 202, wherein two second floating elements 120 are respectively close to the two first sidewalls 210, and one second floating element 120 is close to the second sidewall 220. For ease of explanation, the second floating element 120 close to the second sidewall 220 is referred to as second floating element 120, and the two second floating elements 120 close to the two first sidewalls 210 are referred to as second floating element 120 and second floating element 120, respectively.

[0095] In this example, the second first floating component 110 and the second second floating component 120 are respectively located at two trisection points on the same first sidewall 210, that is, the distance between the second first floating component 110 and the second sidewall 220 is equal to the distance between the second first floating component 110 and the second second floating component 120. Furthermore, the third first floating component 110 and the third second floating component 120 are also respectively located at two trisection points on the same first sidewall 210. Therefore, the line connecting the center points of the second first floating component 110 and the third first floating component 110 is parallel to the second sidewall 220, and the line connecting the center points of the second second floating component 120 and the third second floating component 120 is also parallel to the second sidewall 220.

[0096] In this example, the first floating member 110 is located at the midpoint of the second sidewall 220, and the second floating member 120 is also located at the midpoint of the second sidewall 220.

[0097] In this embodiment, the gravity acting on the connecting bracket 132 is G0, the total gravity acting on all the first floating members 110 is G1, and the total gravity acting on all the second floating members 120 is G2. Therefore, in the static state before adhesive application, the tensile force F measured by the tensile testing mechanism 130 is F = G0 + G1 + G2. Furthermore, until the first floating members 110 and the second floating members 120 come into contact with the adhesive, the tensile force measured by the tensile testing mechanism 130 remains the aforementioned constant value.

[0098] Step S2: Inject adhesive into the first glue injection area 201. When the buoyancy force on the first floating member 110 is greater than 0, stop injecting adhesive into the first glue injection area 201.

[0099] Reference Figures 1-3 As shown, in this embodiment, the dispensing nozzle of the dispensing tube 140 can be positioned directly above the first dispensing area 201 of the dispensing container 200, so that the adhesive flows out from the dispensing nozzle, that is, the adhesive can be dispensed into the first dispensing area 201.

[0100] It is understandable that when injecting adhesive into the first dispensing area 201, the adhesive needs time to flow and spread. Therefore, the adhesive may contact the first floating member 110 before contacting the second floating member 120. At this point, the injection of adhesive should be stopped to avoid overflow. At this time, the adhesive has not yet risen to the dispensing surface 203.

[0101] As some examples of this embodiment, a plurality of first floating members 110 are suspended at intervals in the first glue-filling area 201. In the step of filling the first glue-filling area 201 with glue, the glue can be filled from between the plurality of first floating members 110 toward the first glue-filling area 201. This ensures that the glue will necessarily contact at least one of the first floating members 110 before contacting the second floating member 120.

[0102] In this example, if the nozzle is positioned above the midpoint of the line connecting the second and third first floating components 110, then the nozzle will inject adhesive towards that position.

[0103] In this embodiment, when the adhesive begins to contact the first floating member 110, the first floating member 110 begins to experience buoyancy, and the buoyancy is greater than 0. At this time, the tensile force measured by the tensile testing mechanism 130 begins to change, and the tensile force F < G0 + G1 + G2. Therefore, the tensile force can be indirectly reflected by using the tensile testing mechanism 130 to test the tensile force. When the tensile force of the tensile testing mechanism 130 begins to change as described above, the injection of adhesive into the first glue-filling area 201 can be stopped. Furthermore, when the injection of adhesive is stopped, the adhesive may drop below the first floating member 110 during the leveling process. Therefore, the tensile force measured by the tensile testing mechanism 130 may remain unchanged after the injection of adhesive is stopped.

[0104] It is understood that in this embodiment, multiple first floating members 110 are provided. When any first floating member 110 comes into contact with the adhesive, it will be subject to buoyancy, and will cause the tensile force tested by the tensile testing mechanism 130 to decrease.

[0105] Step S3: Inject adhesive into the second glue-filling area 202 until the buoyancy force on the second floating member 120 is greater than 0.

[0106] Reference Figures 1-3 As shown, in this embodiment, after stopping the injection of adhesive into the first dispensing area 201, the nozzle of the dispensing tube 140 can be positioned directly above the second dispensing area 202 of the dispensing container 200, allowing the adhesive to flow out from the nozzle and thus be injected into the second dispensing area 202. It can be understood that when injecting adhesive into the second dispensing area 202, the adhesive will contact the second floating member 120 before reaching the dispensing surface 203, at which point the injection can be stopped to avoid overflow. At this time, the adhesive has not yet risen to the dispensing surface.

[0107] As some examples of this embodiment, a plurality of second floating members 120 are suspended at intervals in the second glue-filling area 202. In the step of filling the second glue-filling area 202 with glue, the glue can be filled from between the plurality of second floating members 120 toward the second glue-filling area 202. This ensures that the glue will inevitably contact at least one of the second floating members 120 before reaching the glue-filling surface 203.

[0108] In this example, if the nozzle is positioned above the midpoint of the line connecting the second and third floating components 120, then the nozzle will inject adhesive towards that position.

[0109] In this embodiment, when the adhesive begins to contact the second floating member 120, the second floating member 120 begins to experience buoyancy, and the buoyancy is greater than 0. At this time, the tensile force measured by the tensile testing mechanism 130 begins to change, and the tensile force F < G0 + G1 + G2. Therefore, the tensile force can be tested by the tensile testing mechanism 130 to indirectly reflect whether the second floating member 120 is experiencing buoyancy. When the tensile force of the tensile testing mechanism 130 begins to show the above-mentioned change, the injection of adhesive into the second glue-filling area 202 can be stopped.

[0110] It is understood that in this embodiment, multiple second floating members 120 are provided. When any second floating member 120 comes into contact with the adhesive, it will be subject to buoyancy, and will cause the tensile force tested by the tensile testing mechanism 130 to decrease.

[0111] Step S4: Add glue to the first glue-filling area 201 and the second glue-filling area 202 until the glue-filling surface 203 is reached.

[0112] In this embodiment, the main function of replenishing adhesive to the first potting area 201 and the second potting area 202 until the potting surface 203 is to avoid insufficient adhesive and ensure effective encapsulation of the device in the potting container 200.

[0113] As an example of this embodiment, in the step of replenishing adhesive into the glue container 200, the total buoyancy of the first floating member 110 and the second floating member 120 is monitored to determine whether the adhesive in the glue container 200 has reached the glue-filling surface 203. It can be understood that, according to the buoyancy formula, the total buoyancy of the first floating member 110 and the second floating member 120 is related to the volume of adhesive they are immersed in. Let the density of the adhesive be ρ, and the total volume of the first floating member 110 and the second floating member 120 below the glue-filling surface 203 be V. Then, when the adhesive reaches the glue-filling surface 203, the total buoyancy of the first floating member 110 and the second floating member 120 is ρgV, where g is the acceleration due to gravity. Therefore, by monitoring this total buoyancy, it is possible to determine whether the adhesive has reached the glue-filling surface 203. Furthermore, if the method of monitoring total buoyancy is adopted, the top of at least one of the first floating member 110 and the second floating member 120 should be above the glue-filling surface 203 to ensure that the total buoyancy increases with the increase of the glue height. If the glue completely submerges the first floating member 110 and the second floating member 120, the total buoyancy will no longer change accordingly.

[0114] In this embodiment, the tensile testing mechanism 130 can still be used to monitor the total buoyancy of the first floating member 110 and the second floating member 120. For example, when the adhesive reaches the filling surface 203, the tensile force F measured by the tensile testing mechanism 130 is F = G0 + G1 + G2 - ρgV. Therefore, when the tensile force F measured by the tensile testing mechanism 130 is ≤ G0 + G1 + G2 - ρgV, it indicates that the adhesive has reached the filling surface 203, and the replenishment of adhesive can be stopped at this time.

[0115] As some examples of this embodiment, in the step of replenishing adhesive into the dispensing container 200, the adhesive is poured into the area between the first floating member 110 and the second floating member 120. This allows the replenished adhesive to be distributed more evenly, avoiding errors caused by uneven adhesive surfaces.

[0116] Furthermore, in this example, during the step of replenishing adhesive into the dispensing container 200, the dispensing nozzle for dispensing adhesive is controlled to reciprocate between the first floating member 110 and the second floating member 120, and adhesive is continuously dispensed during the reciprocating movement of the dispensing nozzle.

[0117] In this embodiment, after stopping the replenishment of adhesive, the first floating member 110 and the second floating member 120 are removed from the adhesive, and the adhesive is cured, thus completing the dispensing process. The removal of the first floating member 110 and the second floating member 120 slightly affects the height of the adhesive surface. This problem can be solved by using smaller first floating members 110 and 120, or by pre-setting a slightly higher dispensing surface 203. Further details are omitted here. This method enables real-time monitoring of the amount of adhesive dispensed and provides feedback to control the dispensing progress. The dispensing result is more accurate, and overflow or insufficient adhesive is less likely to occur, significantly improving the dispensing yield.

[0118] Understandable. Figures 1-3 The dispensing apparatus shown can be used to implement the above-described dispensing method, but the dispensing method of this disclosure is not limited to using this dispensing apparatus. For example... Figures 1-3 In this embodiment, buoyancy is reflected by testing the tensile force. In other embodiments, sensors can be used to directly monitor the force on the first floating member 110 and the second floating member 120.

[0119] Furthermore, this disclosure also provides the following embodiments and comparative examples to further illustrate the specific implementation and advantages of the above-described potting method.

[0120] In the following embodiments and comparative examples, floats of the same volume and mass are used as the first and second floating components.

[0121] Example 1

[0122] Provide photovoltaic module junction boxes as potting containers, using a method similar to Figure 1 The device in the middle is used for glue dispensing.

[0123] Three floats are suspended in the left half of the glue-filling container, and another three floats are suspended in the right half. Specifically, one float is suspended at each of the two trisection points of the long sidewall, and one float is suspended at the midpoint of the short sidewall. The height of the floats is adjusted so that 60% of the volume of each float is below the glue surface.

[0124] Control the dispensing tube to inject adhesive into the left half of the dispensing container, monitor the tension on the tensile tester, and stop when the tension begins to decrease. Then control the dispensing tube to move above the right half of the container and inject adhesive into the right half of the container, monitor the tension on the tensile tester, and stop when the tension begins to decrease.

[0125] Control the glue-dispensing tube to move back and forth between the left and right halves of the test zone while slowly replenishing the glue until the reading on the tensile tester reaches the preset value, at which point stop replenishing the glue. Preset value = weight of the connecting bracket + 6 × weight of the float - buoyancy when 60% of the float's volume is immersed in the glue.

[0126] Example 2

[0127] Example 2 is basically the same as Example 1, except that: when suspending the floats, the height of the floats is adjusted so that 30% of the volume of all floats is below the glue surface; when replenishing the glue, the preset value is = weight of the connecting bracket + 6 × weight of the floats - buoyancy when 30% of the volume of the floats is immersed in the glue.

[0128] Example 3

[0129] Example 3 is basically the same as Example 1, except that: when suspending the floats, the height of the floats is adjusted so that 90% of the volume of all floats is below the glue surface; when replenishing the glue, the preset value is = weight of the connecting bracket + 6 × weight of the floats - buoyancy when 90% of the volume of the floats is immersed in the glue.

[0130] Example 4

[0131] Example 4 is basically the same as Example 1, except that: during the process of replenishing the glue, the glue tube is fixed directly above the center of the glue container and the glue is replenished slowly without moving back and forth.

[0132] Example 5

[0133] Example 5 is basically the same as Example 1, except that when suspending the floats, only one float is suspended at the midpoint of each of the two short sidewalls, and no floats are suspended at the two trisection points of the long sidewall.

[0134] Comparative Example 1

[0135] Provide the photovoltaic module junction box as a potting container, and directly pour the preset amount of adhesive into it.

[0136] Comparative Example 2

[0137] Comparative Example 2 is basically the same as Example 1, except that: after suspending the float, the glue tube is directly controlled to inject glue directly above the center of the glue container until the reading of the tensile tester reaches the preset value and then the glue is stopped.

[0138] Testing: After pouring the adhesive into each of the above embodiments and comparative examples, check whether there is any problem with excess adhesive or insufficient adhesive. Products without such problems are recorded as good products, and products with such problems are recorded as defective products. The yield rate of adhesive pouring for each embodiment and comparative example is statistically analyzed, and the results are shown in Table 1.

[0139] Table 1

[0140]

[0141] Referring to Table 1, Comparative Example 1 uses a traditional potting method, which involves directly pouring a pre-set amount of adhesive into the junction box, resulting in a potting yield of only 92%. In contrast, Example 1 employs a method of first setting a float, then sequentially injecting adhesive into the left and right halves of the junction box, and finally replenishing the adhesive. This method achieves a potting yield of 99%, with defects primarily stemming from unavoidable random errors during the potting process. There are virtually no issues with adhesive overflow or insufficient adhesive during potting. The potting yields of Examples 2 through 5 are also significantly better than those of Comparative Example 1, demonstrating that the potting method disclosed herein effectively improves the potting yield compared to traditional methods.

[0142] Referring to Table 1, the glue yield of Example 2 is lower than that of Example 1. This is mainly because in Example 2, only 30% of the volume of the float is below the glue surface, increasing the probability of insufficient glue during glue application. Compared to Example 1, the glue yield of Example 3 is lower. This is mainly because in Example 3, 90% of the volume of the float is below the glue surface, increasing the probability of glue overflow during glue application. Compared to Example 1, the glue yield of Example 4 is lower. This is mainly because in Example 4, the glue tube is fixed directly above the center plane when replenishing glue, which causes a delay in the reading of the tensile tester, making it easier for the actual glue amount to exceed the required amount, increasing the probability of glue overflow. Compared to Example 1, the glue yield of Example 5 is lower. This is mainly because in Example 5, the float is suspended only at the midpoint of the short sidewall, which also causes a delay in the reading of the tensile tester, making it easier for the actual glue amount to exceed the required amount, increasing the probability of glue overflow.

[0143] In addition, compared with Examples 1 to 4, Comparative Example 2 adopted a similar float design, but only injected the glue directly above the center of the glue container, instead of injecting the glue in the left and right halves respectively. This resulted in an uneven surface of the injected glue, and the buoyancy of the float could not reflect the actual glue injection progress in real time, which in turn led to a significantly lower glue injection yield.

[0144] Please note that the above embodiments are for illustrative purposes only and are not intended to limit the scope of this document.

[0145] It should be understood that, unless otherwise expressly stated herein, there is no strict order in which the steps are performed, and these steps may be performed in other orders. Moreover, at least some steps in the preparation process may include multiple sub-steps or multiple stages, which are not necessarily completed at the same time, but may be performed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but may be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0146] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0147] 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.

Claims

1. A method for dispensing adhesive, characterized in that, Includes the following steps: The first floating component and the second floating component are respectively suspended in the first dispensing area and the second dispensing area located on one side of the first dispensing area in the dispensing container. The bottom ends of the first floating component and the second floating component are both located below the dispensing surface in the dispensing container. Inject adhesive into the first injection area. When the buoyancy of the first floating component is greater than 0, stop injecting adhesive into the first injection area and start injecting adhesive into the second injection area until the buoyancy of the second floating component is greater than 0. as well as, Add adhesive to the first and second glue-filling areas until the glue reaches the glue-filling surface.

2. The potting method according to claim 1, characterized in that, The top of the first floating component is located above the potting surface; and / or, The top of the second floating component is located above the glue-filling surface.

3. The potting method according to claim 2, characterized in that, In the step of replenishing adhesive into the dispensing container, the total buoyancy of the first floating member and the second floating member is monitored to determine whether the adhesive in the dispensing container reaches the dispensing surface.

4. The potting method according to claim 3, characterized in that, The ratio of the volume of the first floating component below the potting surface to the total volume of the first floating component is (0.5~0.8):1; and / or, The ratio of the volume of the second floating component below the glue-filling surface to the total volume of the second floating component is (0.5~0.8):

1.

5. The potting method according to any one of claims 1 to 4, characterized in that, In the step of replenishing the adhesive into the dispensing container, the adhesive is poured into the area between the first floating member and the second floating member.

6. The potting method according to claim 5, characterized in that, In the step of replenishing the glue container with glue, the glue nozzle for dispensing the glue is controlled to reciprocate between the first floating member and the second floating member, and the glue is continuously dispensed during the reciprocating movement of the glue nozzle.

7. The potting method according to any one of claims 1 to 4 and 6, characterized in that, The plurality of first floating members are suspended at intervals in the first glue-filling area. In the step of filling the first glue-filling area with glue, the glue is poured from between the plurality of first floating members toward the first glue-filling area; and / or, The plurality of second floating members are suspended at intervals in the second glue-filling area. In the step of filling the second glue-filling area with glue, the glue is filled from between the plurality of second floating members toward the second glue-filling area.

8. The potting method according to claim 7, characterized in that, Each of the first floating members is disposed close to the side wall of the dispensing container, and each of the second floating members is disposed close to the side wall of the dispensing container.

9. The potting method according to claim 8, characterized in that, The glue-filling container has two first sidewalls and two second sidewalls arranged in parallel. The first sidewalls are longer than the second sidewalls. The glue-filling container has a central surface parallel to the second sidewalls. The first glue-filling area and the second glue-filling area are located on both sides of the central surface, respectively. At least three of the first floating elements are suspended in the first glue-filling area, wherein two of the first floating elements are respectively close to the two first sidewalls, and one of the first floating elements is close to one of the second sidewalls; At least three second floating elements are suspended in the second glue-filling area, wherein two of the second floating elements are respectively close to the two first sidewalls, and one of the second floating elements is close to the other second sidewall.

10. The potting method according to any one of claims 1-4, 6 and 8-9, characterized in that, The potting container is a photovoltaic module junction box.

11. A dispensing device, characterized in that, The dispensing device is used to perform the dispensing method as described in any one of claims 1 to 10. The dispensing device includes: a first floating member, a second floating member, a dispensing tube, a tensile testing mechanism, and a control mechanism. The first floating member and the second floating member are both suspended and connected to the tensile testing mechanism, and the first floating member and the second floating member are spaced apart. The first floating member and the second floating member are respectively used to be disposed in the first dispensing area and the second dispensing area of ​​the dispensing container. The tensile testing mechanism is used to measure the tensile force applied by the first floating component and the second floating component, and the control mechanism is used to control the glue dispensing tube to dispense glue towards the first glue dispensing area and the second glue dispensing area according to the tensile force received by the tensile testing mechanism.

12. The dispensing apparatus according to claim 11, characterized in that, The tensile testing mechanism includes a connecting bracket and a spring tension gauge. The first floating component and the second floating component are both suspended and connected to the bottom end of the connecting bracket, and the spring tension gauge is connected to the top end of the connecting bracket.

13. The dispensing apparatus according to claim 12, characterized in that, The spring tension gauge includes multiple springs, which are spaced apart and all connected to the top of the connecting bracket; and / or, The connecting bracket is ring-shaped, and the glue-filling tube is disposed inside the ring of the connecting bracket; and / or, Both the first floating component and the second floating component are spherical.

14. The dispensing apparatus according to any one of claims 11 to 13, characterized in that, There are at least three first floating elements, with each of the three first floating elements located at one of the three vertices of an isosceles triangle; and / or, There are at least three second floating elements, and the three second floating elements are located at the three vertices of another isosceles triangle.

Images