Guard device and stringer with same

Abstract

The embodiment of the present application relates to the photovoltaic field, and provides a protection device for being arranged on a detection station of a string welding machine, comprising a protection support, a protection net and a plurality of tension adjusting mechanisms, the protection support comprises a mounting track, the protection net is arranged on the protection support, the protection net comprises a plurality of intercepting lines, a plurality of mounting positions are arranged on the mounting track, the mounting position is connected with the intercepting line, and an intercepting surface for intercepting a to-be-detected piece is formed. A plurality of tension adjusting mechanisms are arranged on at least one of the two mounting tracks, each tension adjusting mechanism is arranged on a corresponding mounting position, and each intercepting line is connected with at least one of the plurality of tension adjusting mechanisms. The present application arranges a plurality of intercepting lines on the protection support to form a protection net for interception, and sets tension adjusting mechanisms on the protection support, so that the tension of the intercepting line is adjusted, and the technical problem that the battery string is prone to falling during the transportation of the string welding machine and affects the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a protective device and a stringer having the same. Background Technology

[0002] Currently, in the booming development of the photovoltaic industry, the importance of string welding machines as one of the key pieces of equipment in manufacturing photovoltaic cell strings is self-evident. The main task of string welding machines is to precisely connect individual cells together using welding ribbons on an automated production line to form cell strings. This process not only requires stable and reliable welding technology but also involves multiple aspects such as precise cell positioning, efficient transport, and quality inspection. In the string welding machine's workflow, the unloading area is a particularly critical node. It refers to the temporary suspension station before the cell strings are completed and transported to the next process. Here, the cell strings need to undergo final quality inspection to ensure they meet electrical performance standards. EL (Electroluminescence) testing is an advanced technology widely used in this stage. By applying current to the cells to make them emit light, it is possible to visually inspect the internal electrical connection quality and electrical performance integrity of the cell strings. During EL testing, operators observe whether the grid lines on the cells are continuous and whether there are defects such as cracks or microcracks. This information is crucial for assessing cell quality and preventing early failures.

[0003] However, even in such a sophisticated manufacturing and testing process, the stringer machine faces a technical problem during the EL testing process in the discharge area: battery strings are prone to falling and causing damage. This problem stems primarily from the fact that the battery strings are suspended in mid-air at the testing station, supported only by a conveyor belt or robotic arm. When the battery strings leave the conveyor and move to the EL imaging station, they lack sufficient physical support. During testing, if the battery strings become loose due to gravity, vibration, or uncoordinated robotic arm movements, they will fall directly into the machine, causing a series of problems. First, the battery strings themselves may suffer severe physical damage, such as cracks caused by edge impacts, or even complete breakage of the battery cells. This not only significantly increases the fragmentation rate but also directly leads to waste of raw materials and increased production costs. Second, the battery string fragments that fall into the machine can threaten the precision components of the EL testing equipment, such as camera lenses and internal cables. These components may be scratched or jammed, affecting the clarity and accuracy of the EL imaging, and may even cause equipment malfunctions, leading to production line downtime and severely impacting production efficiency. Utility Model Content

[0004] This application provides a protective device and a stringer having the same, which at least helps to improve the technical problem that battery strings are easily dropped during the transportation of the stringer, thus affecting production efficiency.

[0005] According to some embodiments of this application, one aspect of this application provides a protective device for installation at the inspection station of a string welding machine, including a protective bracket, a protective net, and multiple tension adjustment mechanisms. The protective bracket includes two installation rails that extend horizontally and are spaced apart.

[0006] The protective net is set on the protective bracket. The protective net includes multiple interception lines. Multiple installation positions are set sequentially along the extension direction of each installation track. Each installation position is connected to at least one of the multiple interception lines to form an interception surface for intercepting the object to be tested.

[0007] Multiple tension adjustment mechanisms are provided on at least one of the two mounting rails, each tension adjustment mechanism is located at a corresponding mounting position, and each intercepting line is connected to at least one of the multiple tension adjustment mechanisms.

[0008] In some embodiments, in the protective device, the intercepting line is disposed at two of a plurality of mounting positions, one end of the intercepting line is connected to one of two mounting rails, and the other end is connected to the other of the two mounting rails; and / or, the intercepting line is disposed at at least three of the plurality of mounting positions, at least one of the at least three mounting positions is disposed on one of the two mounting rails, and at least two of the at least three mounting positions are disposed on the other of the two mounting rails.

[0009] In some embodiments, the protective device further includes a laser sensor disposed on the protective bracket, the laser sensor being disposed corresponding to the protective mesh for detecting the position of the intercepting lines; and / or, each intercepting line is made of a transparent material.

[0010] In some embodiments, each mounting track is provided with a sliding part, and each mounting position is provided with a mating part. Each mating part slides with the sliding part so that the mating part drives the intercepting line to move along the extension direction of the sliding part.

[0011] In some embodiments, the protective bracket includes multiple track groups, each track group including two mounting rails. At least one of the multiple track groups is spaced apart along the length direction of the protective bracket, and at least one of the multiple track groups is spaced apart along the width direction of the protective bracket. The extension direction of each mounting rail is perpendicular to the extension direction of the adjacent mounting rail.

[0012] Each intercept line is connected to one of the two sets of mounting rails; and / or,

[0013] Each interception line is connected to two sets of mounting rails.

[0014] In some embodiments, the protective bracket includes multiple track groups, which are sequentially arranged on the protective bracket in a vertical direction. Each track group includes two mounting rails, which are respectively arranged on opposite sides of the protective bracket.

[0015] Each intercept line is connected to one of multiple track groups; and / or,

[0016] Each intercept line is connected to multiple track groups.

[0017] In some embodiments, each mounting position is provided with a first magnetic element, and each interception line is provided with at least two second magnetic elements, each second magnetic element being magnetically connected to a corresponding first magnetic element; and / or,

[0018] Each installation position is equipped with a first locking part, and each interception line is equipped with at least two second locking parts, each second locking part locking with the corresponding first locking part.

[0019] In some embodiments, the intercepting wire is made of a high-temperature resistant material; and / or, the diameter of the intercepting wire is d, 0.1mm≤d≤0.3mm.

[0020] According to some embodiments of this application, another aspect of this application provides a string welding machine, including the above-described protective device, and the string welding machine further includes:

[0021] The inspection station is equipped with a protective device located below the part to be inspected.

[0022] In some embodiments, the string welding machine further includes an alarm device mounted on a protective support to detect any workpiece falling from the protective mesh and to issue an alarm.

[0023] The technical solution provided in this application has at least the following advantages:

[0024] The protective support frame, serving as the foundation of the entire device, provides stable support points for the installation of the protective netting via two horizontally extending and spaced-apart tracks. The track arrangement ensures that the protective netting forms a continuous interception surface on the horizontal plane, effectively covering the entire battery string under test and preventing accidental falls. The protective netting, mounted on the support frame, consists of multiple interception lines. These lines are distributed between the two tracks and connected to at least one interception line at each mounting position, forming a dense mesh structure. This structure not only withstands the weight of the battery string but also provides immediate support and cushioning in the event of a fall, significantly reducing the fragmentation rate and the risk of damage to the battery string. Multiple tension adjustment mechanisms ensure that the interception lines in the protective netting maintain appropriate tension, crucial for the stable operation of the entire device. These tension adjustment mechanisms are located at multiple mounting positions on at least one track, with at least one connection point to each interception line. By adjusting the tension, these mechanisms ensure that the protective netting remains taut throughout the movement of the battery string, effectively preventing battery string leakage due to slack interception lines. In addition, precise tension control helps reduce the interference of the protective netting on EL test results, ensuring the accuracy and reliability of the test.

[0025] This application constructs a protective net by arranging multiple interception lines on a protective support. A tension adjustment mechanism, corresponding to each interception line, is installed at the mounting position on the track of the protective support to adjust the tension of the interception lines, ensuring the protective net remains at a suitable tautness. The protective device is then positioned at the corresponding location on the testing station of the string welding machine. This effectively intercepts battery strings that fall off during transport, thus solving the technical problem of battery strings easily falling off during transport and affecting production efficiency. Attached Figure Description

[0026] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the drawings in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this application or in the conventional art, the drawings used in the embodiments will be briefly introduced below. Obviously, the 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.

[0027] Figure 1 This is a perspective view of the first embodiment of the protective device of this application;

[0028] Figure 2 This is a perspective view of a second embodiment of the protective device of this application;

[0029] Figure 3 This is a perspective view of a third embodiment of the protective device of this application;

[0030] Figure 4 This is a plan view of the fourth embodiment of the protective device of this application;

[0031] Figure 5 This is a plan view of the fifth embodiment of the protective device of this application;

[0032] Figure 6 This is a plan view of the sixth embodiment of the protective device of this application.

[0033] 100. Protective support;

[0034] 110. Install the track;

[0035] 200. Protective netting;

[0036] 210. Interception line;

[0037] 400. Tension adjustment mechanism. Detailed Implementation

[0038] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0039] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0040] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0041] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0042] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0043] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0044] In the accompanying drawings corresponding to the embodiments of this application, the thickness and area of ​​the layers are enlarged for better understanding and ease of description. When describing a component (such as a layer, film, region, or substrate) on or on the surface of another component, the component may be "directly" located on the surface of the other component, or there may be a third component between the two components. Conversely, when describing a component on the surface of another component, or when another component is formed or disposed on the surface of a component, it indicates that there is no third component between the two components. Furthermore, when describing a component as being "generally" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a portion of the edge of the entire surface.

[0045] In the description of the embodiments of this application, when a component "includes" another component, other components are not excluded unless otherwise stated, and other components may be further included. Furthermore, when a component such as a layer, film, region, or plate is referred to as being "on / located" on another component, it can be "directly on" the other component (i.e., located on the surface of the other component with no other components between them), or it can have another component present in between. Moreover, when a component such as a layer, film, region, or plate is "directly located" on another component, or when a component such as a layer, film, region, or plate is located on the surface of another component, it indicates that no other components are located in between.

[0046] The terminology used in the description of the various embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various embodiments and the appended claims, the term "part" is also intended to include the plural form unless the context clearly indicates otherwise. Components include layers, films, regions, or plates, etc.

[0047] The embodiments of this application will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0048] like Figure 1 As shown, an embodiment of this application provides a protective device for installation at the inspection station of a string welding machine. The device includes a protective support 100, a protective net 200, and multiple tension adjustment mechanisms 400. The protective support 100 includes two horizontally extending and spaced-apart mounting rails 110. The protective net 200 is mounted on the protective support 100 and includes multiple intercepting lines 210. Multiple mounting positions are sequentially arranged along the extension direction of each mounting rail 110, and each mounting position is connected to at least one of the multiple intercepting lines 210 to form an intercepting surface for intercepting the workpiece to be inspected. Multiple tension adjustment mechanisms 400 are arranged on at least one of the two mounting rails 110, with each tension adjustment mechanism 400 located at a corresponding mounting position. Each intercepting line 210 is connected to at least one of the multiple tension adjustment mechanisms 400.

[0049] The protective device provided in this application embodiment forms a protective net 200 for interception by arranging multiple interception lines 210 on the protective bracket 100. A tension adjustment mechanism 400 corresponding to each interception line 210 is set on the mounting position of the mounting track 110 of the protective bracket 100 to adjust the tension of the interception lines 210 so that the protective net 200 can always maintain a suitable taut state. The protective device is arranged in the corresponding position of the stringer welding machine at the detection station, thereby intercepting the battery strings that fall off the stringer welding machine during transportation, thus solving the technical problem that the battery strings are easy to fall off during the transportation of the stringer welding machine, which affects the production efficiency.

[0050] In the above embodiment, the protective bracket 100 serves as the foundation of the entire device. It provides a stable support point for the installation of the protective net 200 via two horizontally extending and spaced-apart mounting rails 110. The mounting rails 110 ensure that the protective net 200 forms a continuous interception surface on the horizontal plane, effectively covering the entire area below the battery string to be tested and preventing accidental falls. The protective net 200, mounted on the protective bracket 100, consists of multiple interception lines 210. These interception lines 210 are distributed between the two mounting rails 110, forming a dense mesh structure by connecting to at least one interception line 210 at each mounting position. This structure not only withstands the weight of the battery string but also provides immediate support and cushioning in the event of a fall, significantly reducing the fragmentation rate and the risk of damage to the battery string. The multiple tension adjustment mechanisms 400 ensure that the interception lines 210 in the protective net 200 maintain appropriate tension, which is crucial for the stable operation of the entire device. The tension adjustment mechanism 400 is disposed at multiple mounting positions on at least one mounting rail 110, with at least one connection point to each intercepting line 210. By adjusting the tension, the tension adjustment mechanism 400 ensures that the protective net 200 remains taut during the movement of the battery string, effectively preventing battery string leakage that may occur due to slack in the intercepting line 210. Furthermore, precise tension control helps reduce interference from the protective net 200 on the EL test results, ensuring the accuracy and reliability of the test.

[0051] Specifically, the interception line 210 is positioned at two of the multiple mounting locations. One end of the interception line 210 is connected to one of the two mounting rails 110, and the other end is connected to the other mounting rail 110. This secure connection ensures the stability of the interception line 210 on one side of the protective bracket 100, resisting displacement or deformation caused by the weight of the battery string or external vibration. The other end is connected to the other mounting rail 110, forming a continuous support spanning the entire width of the protective bracket 100, ensuring that the battery string at any location receives equal protection. This synergistic relationship, through stable anchor points at both ends and appropriate tension adjustment, allows the interception line 210 to form a uniformly distributed protective line below the battery string transmission path. When the battery string deviates from its normal path for any reason, this barrier can immediately capture and buffer the battery string to prevent it from falling and being damaged, thereby significantly reducing the breakage rate and ensuring the production efficiency and component quality of the string welding machine during transportation.

[0052] In the above embodiments, such as Figure 1As shown, there are three mounting positions on the mounting track 110. The protective net 200 includes three intercepting lines 210. Each intercepting line 210 is connected to one mounting position on two mounting tracks 110 respectively. The two mounting positions connected to each intercepting line 210 are on the same horizontal plane.

[0053] In some embodiments, such as Figure 2 As shown, the protective net 200 can also be configured to include four intercepting lines 210, each of which is connected to a mounting position on one of the two mounting rails 110, wherein the two mounting positions connected to each intercepting line 210 are on different horizontal planes.

[0054] In some embodiments, the intercept line 210 is disposed on at least three of the plurality of mounting positions, at least one of the at least three mounting positions is disposed on one of the two mounting rails 110, and at least two of the at least three mounting positions are disposed on the other of the two mounting rails 110. Figure 3 As shown, the protective net 200 includes three intercepting wires 210. Two of them are connected to three of the multiple mounting positions. The three mounting positions are respectively set on two mounting rails 110, and the intercepting wire 210 is connected to the three mounting positions in sequence. The other intercepting wire 210 is connected to four of the multiple mounting positions. Two of the four mounting positions are respectively set on two different mounting rails 110, and the intercepting wire 210 is connected to the four mounting positions in sequence.

[0055] Specifically, the protective device also includes a laser sensor mounted on the protective bracket 100, corresponding to the protective mesh 200, for detecting the position of the interceptor wires 210. The protective device also integrates a laser sensor mounted on the protective bracket 100, corresponding to the layout of the protective mesh 200, specifically for real-time monitoring of the position of the interceptor wires 210. This configuration allows the laser sensor to accurately identify the current state of each interceptor wire 210, including but not limited to changes in wire tension, displacement, or potential signs of breakage, thereby detecting and warning of any abnormalities that may affect the protective effect at the first instance.

[0056] In some embodiments, each intercept line 210 is made of a transparent material. The key to this design is to reduce interference with EL testing within the stringer inspection station. The transparent intercept lines 210 barely affect light transmission, ensuring the clarity of the EL image quality and thus maintaining inspection accuracy. Simultaneously, the choice of transparent material helps improve the concealment of the protective device, allowing it to function as a protective element without becoming a significant visual obstacle on the production line, maintaining a clean and professional working environment.

[0057] In the above embodiment, the synergistic effect between the laser sensor and the transparent interceptor line 210 is achieved by the laser sensor continuously projecting a light beam and receiving reflected signals. Due to the transparency of the interceptor line 210, the light beam can pass through unimpeded. However, when a slight displacement, deformation, or breakage occurs on the interceptor line 210, the laser sensor can sensitively detect the change in reflected light and quickly locate the problem. This mechanism not only ensures the integrity of the protective net 200 but also indirectly improves the accuracy of EL detection, because timely adjustment or replacement of the interceptor line 210 can prevent additional scattering or absorption of light caused by insufficient tension or damage. Therefore, the laser sensor and the transparent interceptor line 210 together constitute a highly sensitive and reliable monitoring system, significantly enhancing the safety and functionality of the protective device.

[0058] Specifically, each mounting track 110 is equipped with a sliding part, and each mounting position is equipped with a mating part. The mating parts slide against the sliding parts, allowing the mating parts to move the intercepting line 210 along the extension direction of the sliding parts. This application utilizes the sliding fit to allow the mating parts to move flexibly along the direction of the sliding parts, thereby adjusting the position of the intercepting line 210 in the extension direction of the sliding parts. This sliding fit allows the protective device to quickly adjust the layout of the intercepting line 210 according to the real-time position and speed of the transmitted battery strings and the different types of battery strings being transported, ensuring it is always in the most ideal working state. The sliding parts provide a smooth guiding platform for the movement of the intercepting line 210, reducing frictional resistance and making position adjustment smoother and more precise. The combination of the mating parts and the sliding parts is key to the precise positioning and stable support of the intercepting line 210, ensuring that the intercepting line 210 can respond quickly and form an effective interception regardless of changes in the battery strings.

[0059] Specifically, the protective bracket 100 includes multiple track groups, each track group including two mounting rails 110. At least one of the multiple track groups is spaced apart along the length direction of the protective bracket 100, and at least one of the multiple track groups is spaced apart along the width direction of the protective bracket 100. The extension direction of each mounting rail 110 is perpendicular to the extension direction of the adjacent mounting rail 110. Each intercepting line 210 is connected to one of the two sets of mounting rails 110. Figure 4As shown, the protective bracket 100 includes two track groups, each consisting of two mounting tracks 110. One track group is spaced apart along the length of the protective bracket 100, while the other track group is appropriately spaced along the width of the protective bracket 100. This layout ensures that the support network on the surface of the entire protective bracket 100 has both longitudinal stability and lateral balance, forming a comprehensive protective system. The extension directions of each mounting track 110 are perpendicular to each other, meaning that no matter which direction the battery string deviates from, it will encounter the interception line 210 supported by the mounting track 110. Each interception line 210 is tightly connected to one of the two sets of mounting tracks 110, making the interception lines 210 on the two track groups perpendicular to each other. This not only ensures the precise positioning of the interception line 210 in space but also allows it to respond quickly according to the actual movement trajectory of the battery string, effectively intercepting and correcting both vertical and horizontal deviations.

[0060] In some embodiments, the protective bracket 100 includes multiple track groups, each track group including two mounting rails 110. At least one of the multiple track groups is spaced apart along the length direction of the protective bracket 100, and at least one of the multiple track groups is spaced apart along the width direction of the protective bracket 100. The extending direction of each mounting rail 110 is perpendicular to the extending direction of the adjacent mounting rail 110, and each intercepting line 210 is connected to both sets of mounting rails 110. Figure 5 As shown, the protective bracket 100 incorporates multiple track groups, each consisting of two mounting tracks 110. These track groups form a three-dimensional grid structure. This design ensures that the protective bracket 100 provides comprehensive support and protection from any viewing angle. The extension direction of each mounting track 110 is carefully planned to be perpendicular to the extension direction of adjacent mounting tracks 110, creating an interlocking support system. This structural feature not only increases the stability of the protective bracket 100 but also ensures that each intercepting line 210 can effectively connect to both sets of mounting tracks 110. Furthermore, the design of the intercepting lines 210 connecting to both sets of mounting tracks 110 allows the intercepting lines 210 to form a crisscrossing protective net 200, enabling the intercepting lines 210 to function simultaneously in multiple dimensions. Even under complex operating conditions or when the battery string is very heavy, it can effectively capture and support battery strings that deviate from their tracks, preventing them from falling.

[0061] Specifically, the protective support 100 includes multiple track groups, which are sequentially arranged vertically on the protective support 100. Each track group includes two mounting rails 110, which are respectively located on opposite sides of the protective support 100. Each interception line 210 is connected to one of the multiple track groups. In the design of the protective support 100, the multiple track groups are arranged sequentially vertically to form a highly efficient multi-level protection system. Each track group consists of two mounting rails 110. This layout not only increases the coverage of the protection but also improves the redundancy of the protection through hierarchical design. Even if individual track groups fail, the remaining track groups can still continue to function, maintaining the continuity and reliability of the protection function. Each interception line 210 is set on the protective support 100 of one of the multiple track groups to form a multi-layered protective net 200 with a vertically stacked design.

[0062] In the above embodiments, multiple orbital groups can be as follows: Figure 1 As shown, multiple track groups are stacked vertically on protective supports 100 located at both ends along the transport direction of the string welding machine. Each protective support 100 has multiple parallel mounting tracks 110. Alternatively, as shown... Figure 6 As shown, protective supports 100 are stacked vertically on both sides of the conveying direction of the string welding machine. Alternatively, as shown... Figure 4 As shown, track groups are provided at both ends and on both sides of the transport direction of the string welding machine, and multiple parallel installation tracks 110 are provided on each protective bracket 100.

[0063] In some embodiments, the protective bracket 100 includes multiple track groups, which are sequentially arranged vertically on the protective bracket 100. Each track group includes two mounting rails 110, which are respectively arranged on opposite sides of the protective bracket 100. Each interception line 210 is connected to the multiple track groups. In this embodiment, as shown... Figure 5 As shown, each interception line 210 is not connected to a single track group, but rather to multiple track groups. This means that the interception line 210 spans different protection levels, forming a support network that runs vertically. This multi-track connection design allows the interception line 210 to dynamically change its tension and position according to the movement of the battery string at different heights, through coordinated adjustments between the track groups, thereby more effectively intercepting and guiding the battery string and preventing it from falling due to gravity or vibration. Each protective bracket 100 is equipped with multiple parallel mounting tracks 110, which forms a multi-layered protective net 200 on the protective bracket 100, further ensuring the interception effect.

[0064] Specifically, each mounting position is equipped with a first magnetic element, and each intercepting line 210 is equipped with at least two second magnetic elements, each second magnetic element being magnetically connected to its corresponding first magnetic element. At each mounting position of the protective bracket 100, a first magnetic element 310 is provided, and correspondingly, each intercepting line 210 is equipped with at least two second magnetic elements 320. These second magnetic elements 320 and first magnetic elements 310 form a one-to-one correspondence, and through magnetic connection, the intercepting line 210 is securely fixed to the designated position of the protective bracket 100. This magnetic connection mechanism not only greatly simplifies the installation and removal process of the intercepting line 210 and improves the efficiency of production line maintenance and adjustment, but also ensures that the intercepting line 210 maintains sufficient stability when subjected to the weight of the battery string or external impact, preventing accidental detachment or displacement. Furthermore, due to the non-permanent nature of the magnetic connection, the intercepting line 210 can be flexibly adjusted in position according to changes in the size of the battery string or adjustments in the production line layout, adapting to different production needs.

[0065] In some embodiments, each mounting position is provided with a first snap-fit ​​portion, and each interceptor line 210 is provided with at least two second snap-fit ​​portions, each second snap-fit ​​portion snapping into the corresponding first snap-fit ​​portion. To achieve a stable and flexible connection of the interceptor line 210 on the protective bracket 100, a snap-fit ​​mechanism between the first and second snap-fit ​​portions is adopted. Each mounting position is provided with a first snap-fit ​​portion, which serves as a fixing point, distributed at various key locations on the protective bracket 100 to ensure the stability and integrity of the entire structure. Correspondingly, each interceptor line 210 is equipped with at least two second snap-fit ​​portions, which can precisely mate with the first snap-fit ​​portions to form a snap-fit ​​fit. Through the snap-fit ​​between the second and first snap-fit ​​portions, the interceptor line 210 is securely installed on the protective bracket 100. Simultaneously, due to the characteristics of the snap-fit ​​structure, the possibility of fine-tuning the position of the interceptor line 210 when necessary is retained to adapt to different specifications of battery strings or changes in the position of battery strings during production. The introduction of this snap-fit ​​mechanism not only greatly simplifies the installation and disassembly process of the interceptor line 210 and improves maintenance efficiency, but also ensures the reliability and flexibility of the connection between the interceptor line 210 and the protective bracket 100. In actual operation, if it is necessary to adjust the layout of the interceptor line or replace a worn interceptor line 210, the operator only needs to operate the snap-fit ​​part to complete the corresponding adjustment or replacement without stopping the machine for complex disassembly and assembly operations, greatly reducing the downtime of the production line.

[0066] Specifically, the interception line 210 is made of a high-temperature resistant material. In this embodiment, the interception line 210 is made of a high-temperature resistant material, a design decision that directly addresses the need for high-temperature adaptability of materials during photovoltaic module production. Considering that during string welding operations, especially in the welding and EL detection stages, the internal ambient temperature of the equipment can significantly rise, reaching or even exceeding 200 degrees Celsius, traditional non-high-temperature resistant materials may soften, deform, or even lose some mechanical properties under such conditions, thus affecting the support and protection effect of the interception line 210 on the battery string. The selection of a high-temperature resistant material ensures that the interception line 210 can maintain its structural stability and sufficient strength in high-temperature environments, and is not prone to physical changes. This performance guarantee enables the interception line 210 to effectively intercept and support the battery string passing through the EL detection area, preventing the battery string from falling off the conveyor track due to gravity or vibration even under high-temperature conditions, reducing the breakage rate and improving the production yield.

[0067] In some embodiments, the diameter of the interceptor line 210 is d, where 0.1mm ≤ d ≤ 0.3mm. To ensure efficient protection and low interference performance of the interceptor line 210 on the protective bracket 100, the diameter parameter of the interceptor line 210 is specifically designed. The diameter d of the interceptor line 210 is limited to between 0.1mm and 0.3mm. This size range is chosen based on a comprehensive consideration of factors such as material strength, battery string weight, and light transmittance during EL detection. First, the interceptor line 210 needs sufficient strength to withstand the impact force when the battery string falls, preventing breakage or deformation during support and ensuring the reliability of the protective function. Simultaneously, to minimize obstruction of the EL detection image, the size of the interceptor line 210 should not be too large; a range of 0.1mm to 0.3mm is just right, providing the necessary physical support while barely interfering with light transmission during the detection process, ensuring image quality. Second, a smaller d value means that the interceptor line 210 requires higher precision during snap-fitting to ensure its stable position on the bracket. This precise snap-fit, combined with the micro-diameter of the interceptor wire 210, not only showcases ingenious design but also ensures the efficient operation of the entire anti-drop-out device. Furthermore, there is a delicate balance between the diameter of the interceptor wire 210 and the size and weight of the battery string. A diameter that is too small may not provide sufficient support, while a diameter that is too large may affect the accuracy of EL detection. The range of 0.1mm to 0.3mm is the result of repeated testing and optimization, achieving the optimal balance between support and light transmittance, ensuring the safety of the battery string without affecting EL detection.

[0068] Another aspect of this application provides a stringing machine, including the aforementioned protective device. The stringing machine also includes an inspection station, on which the protective device is installed, positioned below the battery string to be inspected. In this embodiment, the protective device is integrated inside the stringing machine and positioned below the battery string to be inspected at the inspection station. This design directly addresses the risk of the battery string falling during the EL inspection stage, ensuring production continuity and safety. The stringing machine, as a core piece of equipment in photovoltaic module production, is responsible for welding battery cells into strings, which are then inspected by EL imaging at the inspection station to assess welding quality and battery string integrity. During this process, the protective device is positioned below the battery string to be inspected to protect both the battery string and the stringing machine. The protective device consists of multiple components, including but not limited to a protective bracket 100 and an intercepting line 210. The protective bracket 100 provides robust structural support for the entire protection system, while the intercepting line 210 directly undertakes the task of preventing the battery string from falling. The interceptor wire 210 is made of high-temperature resistant material, capable of withstanding the high temperatures generated during welding, ensuring reliable operation even in high-temperature environments, and its tension and support capacity are not affected by temperature changes. Furthermore, the first and second locking parts in the protective device allow for a flexible and reliable connection between the interceptor wire 210 and the protective bracket 100. This connection method not only facilitates the installation and removal of the interceptor wire 210 but also ensures that it can be quickly adjusted according to the movement of the battery string or the specific conditions of the inspection station, thereby maximizing its protective effect.

[0069] Specifically, the string welding machine also includes an alarm device mounted on the protective support 100 to detect any parts to be inspected falling from the protective net 200 and issue an alarm. The string welding machine not only integrates a protective device but also includes a dedicated alarm system. This design allows the string welding machine to monitor the status of the protective net 200 in real time. When a part to be inspected accidentally falls onto the protective net 200, the alarm device can quickly detect the abnormality and immediately issue an alarm signal to notify the operator for handling. The alarm device is mounted on the protective support 100 to ensure it can directly monitor any changes to the protective net 200, including the abnormal falling of parts to be inspected. This proximity-based arrangement allows the alarm device to detect abnormalities immediately, reducing delays and effectively preventing misoperation in subsequent processes, thus reducing the defect rate and scrap costs.

[0070] The string welding machine of this application embodiment features multiple evenly arranged interception lines 210 at the EL detection station in the discharge area of ​​the string welding machine. The interception lines 210 are made of transparent fishing line, a high-strength, low-refractive-index material, and are fixed by a tension adjustment mechanism 400. They are non-contactly laid across the transmission channel of the string welding machine, forming a buffer protective net 200. The spacing of the interception lines 210 is mechanically optimized to disperse impact force, and the use of fishing line with a light transmittance greater than 98% avoids interference with EL detection. The surface of the interception lines 210 is hydrophobically treated to reduce contamination. The arc-surface tensioning technology of the tension adjustment mechanism 400 ensures static tension and dynamic deformation compensation capabilities. An alarm device is also added to alert the machine operator to any accidental drops, allowing for timely removal of any dropped strings. After installation, the success rate of intercepting battery strings exceeds 90%. The captured battery strings can be recycled, and damage to the camera and cables from falling impacts is prevented. The solution requires no modification to core equipment, has a long maintenance cycle, is suitable for cleanroom environments, and comprehensively improves production efficiency and equipment reliability.

[0071] In the above embodiment, the intercepting wire 210 is made of polyetheretherketone (PEEK) or ceramic-coated steel wire. The spacing between two adjacent intercepting wires 210 is set to 5 mm. The tension adjustment mechanism adjusts the intercepting wires 210 so that the pre-tension of the intercepting wires 210 is controlled between 10-20 N.

[0072] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0073] To prevent battery strings from falling off: By setting a protective net 200 on the protective bracket 100, and connecting each interception line 210 to the mounting position on the mounting rail 110, an interception surface that can effectively intercept the test piece (battery string) is formed, which significantly reduces the risk of the battery string falling off due to gravity or vibration during EL testing, thereby reducing the fragmentation rate and improving the production yield.

[0074] Dynamic tension adjustment: The introduction of the tension adjustment mechanism 400 allows for precise control of the tension of each intercepting wire 210. This not only ensures that the intercepting wire 210 remains taut at all times, improving the support effect, but also allows for dynamic adjustment of the tension according to the weight and size of the battery string to adapt to different production needs, ensuring the stability and flexibility of the protective net 200.

[0075] Intelligent monitoring and position feedback: The laser sensor enables real-time detection of the position of the interception line 210, ensuring that it does not shift due to external forces during production. This intelligent monitoring method, combined with the interception line 210 made of transparent material, ensures that the presence of the protective net 200 has almost no impact on EL detection imaging, while also providing immediate feedback on the status of the protective net, thus improving the level of intelligence in the production process.

[0076] Easy maintenance and adjustment: The sliding part on the mounting rail 110 and the mating part on the mounting position are designed so that the interception line 210 can be easily moved and adjusted along the extension direction of the mounting rail 110. This feature greatly simplifies the maintenance and adjustment process of the protective net 200, reduces maintenance costs, and improves the operating efficiency of the production line.

[0077] Multi-layer protective structure: The protective bracket 100 incorporates a structure with multiple track groups, allowing for the installation of multiple layers of protective netting 200, thus enhancing protective capabilities. This multi-layer protective structure provides stable support even when battery strings pass through the EL inspection station at high speed, further ensuring production safety.

[0078] Magnetic or snap-fit ​​connection: The connection method between the first magnetic component and the second magnetic component, and between the first snap-fit ​​part and the second snap-fit ​​part, makes the installation and removal of the interception line 210 extremely convenient, without the need for additional tools, thus improving maintenance efficiency and the rapid response capability of the equipment.

[0079] High Temperature Resistance and Precise Dimensional Control: The interceptor wire 210 is made of high-temperature resistant material, ensuring stability under the high-temperature environment of the stringing machine and preventing deformation or damage. Simultaneously, the diameter d of the interceptor wire 210 is precisely controlled within the range of 0.1mm to 0.3mm, guaranteeing both support strength and minimizing interference with the testing process, achieving a perfect balance between protection and detection.

[0080] Integrated protection for string welding machines: This protective device is integrated into the string welding machine, located directly below the inspection station, seamlessly embedded in the production process, reducing the space occupied by additional equipment and optimizing the production line layout.

[0081] Real-time alarm and anomaly handling: The alarm device can monitor the dynamics of the protective net 200 in real time. Once a fallen part to be inspected is detected, an alarm will be issued immediately, prompting operators to respond quickly, avoiding misoperation and potential equipment damage in the subsequent production line, and strengthening production management.

[0082] In summary, the protective device of this application and its application in the string welding machine not only solves the long-standing problem of battery strings falling off during EL testing, but also significantly improves production efficiency, reduces production costs, and enhances the safety and controllability of the production process through innovative means such as intelligent monitoring, dynamic tension adjustment, and easy maintenance design. It plays an important role in promoting the continuous improvement and efficiency enhancement of the photovoltaic module manufacturing industry.

[0083] Those skilled in the art will understand that the above embodiments are specific examples of implementing this application, and in practical applications, various changes in form and detail can be made without departing from the spirit and scope of this application. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of this application; therefore, the scope of protection of this application should be determined by the scope defined in the claims.

Claims

1. A protective device, characterized in that, For use at the inspection station of the string welding machine, including: A protective bracket (100) includes two horizontally extending and spaced-apart mounting rails (110); A protective net (200) is disposed on the protective bracket (100). The protective net (200) includes a plurality of intercepting lines (210). A plurality of mounting positions are sequentially disposed on each of the mounting rails (110) along the extension direction of the mounting rails (110). Each mounting position is connected to at least one of the plurality of intercepting lines (210) to form an intercepting surface for intercepting the object to be tested. Multiple tension adjustment mechanisms (400) are provided on at least one of the two mounting rails (110), each tension adjustment mechanism (400) is provided on a corresponding mounting position, and each intercepting line (210) is connected to at least one of the multiple tension adjustment mechanisms (400).

2. The protective device according to claim 1, characterized in that, The intercepting line (210) is disposed at two of the plurality of mounting positions, one end of the intercepting line (210) is connected to one of the two mounting rails (110), and the other end of the intercepting line (210) is connected to the other of the two mounting rails (110); and / or, the intercepting line (210) is disposed at at least three of the plurality of mounting positions, at least one of the at least three mounting positions is disposed at one of the two mounting rails (110), and at least two of the at least three mounting positions are disposed at the other of the two mounting rails (110).

3. The protective device according to claim 1, characterized in that, The protective device further includes a laser sensor, which is mounted on the protective bracket (100) and positioned corresponding to the protective net (200) to detect the position of the intercepting line (210); and / or, Each of the aforementioned intercept lines (210) is made of a transparent material.

4. The protective device according to claim 1, characterized in that, Each of the mounting rails (110) is provided with a sliding part, and each of the mounting positions is provided with a mating part. Each of the mating parts slides with the sliding part so that the mating part drives the intercepting line (210) to move along the extension direction of the sliding part.

5. The protective device according to claim 1, characterized in that, The protective bracket (100) includes multiple track groups, each track group including two mounting tracks (110). At least one of the multiple track groups is spaced apart along the length direction of the protective bracket (100), and at least one of the multiple track groups is spaced apart along the width direction of the protective bracket (100). The extension direction of each mounting track (110) is perpendicular to the extension direction of the adjacent mounting track (110). Each of the intercepting lines (210) is connected to one of the two sets of mounting rails (110); and / or, Each of the intercept lines (210) is connected to the two sets of mounting rails (110).

6. The protective device according to claim 1, characterized in that, The protective bracket (100) includes multiple track groups, which are arranged sequentially on the protective bracket (100) in a vertical direction. Each track group includes two mounting tracks (110), which are respectively arranged on opposite sides of the protective bracket (100). Each of the intercept lines (210) is connected to one of the plurality of track groups; and / or, Each of the intercept lines (210) is connected to the plurality of track groups.

7. The protective device according to claim 1, characterized in that, Each of the aforementioned mounting positions is provided with a first magnetic element, and each of the aforementioned interception lines (210) is provided with at least two second magnetic elements, each of the second magnetic elements being magnetically connected to the corresponding first magnetic element; and / or, Each of the aforementioned mounting positions is provided with a first latching part, and each of the aforementioned intercepting lines (210) is provided with at least two second latching parts, and each second latching part latches with the corresponding first latching part.

8. The protective device according to claim 1, characterized in that, The intercepting line (210) is made of a high-temperature resistant material; and / or, The diameter of the intercepting line (210) is d, 0.1mm≤d≤0.3mm.

9. A string welding machine, comprising the protective device according to any one of claims 1 to 8, characterized in that, The string welding machine also includes: The inspection station is equipped with the protective device, which is located below the workpiece to be inspected.

10. The string welding machine according to claim 9, characterized in that, The string welding machine also includes an alarm device, which is installed on the protective bracket (100) to detect the test piece falling from the protective net (200) and issue an alarm.

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