A junction box detection device for photovoltaic modules and a wire disconnection detection device thereof

Abstract

The utility model relates to a kind of junction box detection equipment and its wire arrangement virtual soldering detection device for photovoltaic module in the field of photovoltaic module preparation, including first driving mechanism and probe component;Probe component includes fork and conducting block, and the lower end of fork is equipped with prong, and the inner side of prong is connected with conducting block, and the inner side of prong refers to the side of the moving direction of prong after prong and the contact of the welding point to be detected to move welding point;The upper end of fork is driven to be connected with first driving mechanism, and first driving mechanism drives fork horizontal movement, and the end of prong is used to move welding point, and the welding wire that is moved up by prong when virtual soldering is contacted and conducted with conducting block.The utility model solves the problems, such as mechanism complex, calculation discrimination process is complicated and cost is high, caused by visual equipment in prior art to identify virtual soldering detection, substantially improve the detection accuracy and reaction rate of detection mechanism, while reducing the overall cost of detection device.

Description

Technical Field

[0001] This utility model relates to the field of welding inspection technology, specifically to a testing device for junction boxes used in photovoltaic modules and a device for detecting poor solder joints in their wiring. Background Technology

[0002] In the manufacturing process of electronic modules for electronic devices or cables with connectors, it is often necessary to solder ribbon cables onto the circuit boards of the electronic modules or the connectors. Poor soldering is a common defect after soldering. For example, after soldering the ribbon cable to the circuit board, it is often necessary to check for poor soldering between the connecting wires and the connecting terminals.

[0003] Currently, some methods involve manually inspecting each connection wire and terminal weld using a testing pen. This method is not only inefficient but also prone to omissions due to operator negligence. Other methods involve installing three sets of visual inspection cameras directly behind the junction box welding equipment to visually inspect for cold solder joints. If cold solder joints are detected, the defective solar cell modules are marked and reworked. For example, CN206223676U discloses a detection machine for poor solder joints in junction boxes. It includes a frame with a pair of spaced-apart X-axis slide rails at the upper end. A fixed support rod is fixed to one end of the X-axis slide rails, and a Y-axis support frame is mounted on the other end. A cylinder is mounted on the Y-axis support frame, and the cylinder's extension rod is connected to the fixed support rod. A Y-axis slide rail is mounted at the bottom of the Y-axis support frame, and a Z-axis crossbar is mounted on the Y-axis slide rail, driven by a motor mounted on the Y-axis support frame. A Z-axis slide rail is mounted on the Z-axis crossbar, and a Z-axis cylinder is mounted at one end of the Z-axis slide rail. A slider is mounted on the Z-axis slide rail, and a camera device is suspended on the slider. The slider is connected to the Z-axis cylinder, allowing the camera device to move synchronously with the slider. Although detection is performed visually, the structural design is relatively complex, and image recognition still has the problem of difficulty in identifying some cases of poor solder joints. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a testing device for junction boxes used in photovoltaic modules and a device for detecting poor solder joints in their wiring.

[0005] A cable solder joint detection device according to the present invention includes a detection component and a first drive mechanism; The inspection component includes a fork and a conductive block. The lower end of the fork is provided with a tooth, and the conductive block is connected to the inner side of the tooth. The inner side of the tooth refers to the side that moves the solder joint in the direction of contact after the tooth contacts the solder joint to be inspected. The upper end of the shift fork is driven to connect to the first driving mechanism, and the first driving mechanism drives the shift fork to move horizontally. The end of the shift tooth is used to move the solder joint. When there is a poor solder joint, the solder wire that is moved and lifted by the shift tooth comes into contact with the conductive block and becomes conductive.

[0006] In some embodiments, the lower end of the shift fork is provided with two shift teeth, which are arranged at intervals relative to each other, and a conductive block is arranged between the two shift teeth. The conductive block is an L-shaped plate, and the horizontal part of the conductive block is located between the two shift teeth.

[0007] In some embodiments, the first drive mechanism includes a first drive motor and a drive arm. The drive arm is horizontally D-shaped and includes a straight arm and an arc-shaped arm. The upper end of the shift fork is sleeved on the straight arm, and the first drive motor drives the arc-shaped arm.

[0008] In some embodiments, the first drive mechanism further includes an elastic element, the shift fork is slidably connected to the straight arm, two elastic elements are respectively sleeved on the straight arm, and the elastic elements are pressed between the shift fork and the end of the arc-shaped arm.

[0009] In some embodiments, the first drive mechanism further includes pressure sensors, two of which are respectively sleeved on the linear arm, and the elastic element is pressed between the pressure sensors and the shift fork.

[0010] In some embodiments, the first drive mechanism further includes a sliding support block. The sliding support module has an overall L-shaped structure. The first drive motor is located on the horizontal block of the sliding support block. The vertical block of the sliding support block is provided with a protrusion. The fork is supported and connected to the protrusion and can slide horizontally.

[0011] In some embodiments, the shift fork includes a fixed slider and a movable slider, the fixed slider is connected to the drive arm, the movable slider is vertically slidable along the fixed slider, the shift teeth are located at the lower end of the movable slider, and the upper end of the movable slider is provided with a hook head, which is engaged with the upper end of the fixed slider.

[0012] In some embodiments, a displacement sensor is provided at the upper end of the fixed slider, and the displacement sensor is used to obtain the distance the hook head moves upward.

[0013] This utility model also provides a testing device for junction boxes used in photovoltaic modules, including the aforementioned cable solder joint detection device.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The cable cold solder joint detection device provided in this embodiment adopts a conductive block with current conduction above the picking teeth near the picking solder joint, so that the cold solder joint can be confirmed after the end of the picked wire comes into contact with the conductive block. The structure is simple and the operation is convenient. It solves the problems of complex mechanism, cumbersome calculation and discrimination process and high cost caused by the use of vision equipment for cold solder joint detection in the prior art through physical means. It greatly improves the detection accuracy and response rate of the detection mechanism, while reducing the overall cost of the detection device.

[0015] 2. The present invention provides a cable lamination detection device. In the drive mechanism, an elastic element is set to replace the direct fastening connection between the straight arm and the fork. The flexible drive reduces the damage of the teeth to the solid weld joint. Furthermore, by setting a pressure sensor, the device can preset the magnitude of the force applied to the weld joint and record the magnitude of the destructive force that the lamination weld joint can withstand. This facilitates effective information feedback to the upstream welding process and improves the production efficiency and product qualification rate of the production line.

[0016] 3. The present invention relates to a cable solder joint detection device. By optimizing the design of the fork into a relatively sliding split structure and setting a corresponding displacement sensor at the upper end, the vertical sliding makes the contact between the fork and the solder joint soft. In addition, the vertical movement distance can determine whether to make a toggle action, thereby reducing damage to the cable solder joint and effectively improving the detection efficiency. Attached Figure Description

[0017] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a front view structural diagram of the cable solder joint detection mechanism of this utility model; Figure 2 This is a rear-view structural diagram of the cable solder joint detection mechanism of this utility model; Figure 3 This is a schematic diagram of the elastic element in the cable solder joint detection mechanism of this utility model. Figure 4 This is a schematic diagram of the forward structure of the connection between the shift fork and the conductive block of this utility model; Figure 5 This is a schematic diagram of the rear structure of the connection between the shift fork and the conductive block of this utility model. Detailed Implementation

[0018] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention. Example

[0019] This embodiment provides a cable cold solder joint detection mechanism, referencing... Figure 1-5 As shown, it mainly includes a locating and inspection component 1 for locating and inspecting solder joints and a first drive mechanism 2 for driving the locating and inspection component 1 to move horizontally.

[0020] The inspection component 1 mainly includes a fork 11 and a conductive block 12. The overall structure of the fork 11 can be a rod, a plate, or a column; this embodiment uses a column structure as an example. The lower end of the fork 11 forms a wedge-shaped tooth 110, the tip of which is used to contact the solder joint and perform a toggle action. In a preferred embodiment, there are two teeth 110 at the lower end of the fork 11, arranged opposite each other and spaced a predetermined distance apart. When two teeth 110 are provided at the lower end of the same fork 11, the inspection of both sides of the solder joints in the junction box under inspection can be achieved by driving the fork 11 to move left and right, thus improving inspection efficiency.

[0021] The conductive block 12 is a structure made of metals such as copper, aluminum, and iron. The conductive block 12 is connected to the inner surface of the tooth 110. The inner surface of the tooth 110 refers to the side of the tooth 110 that moves the solder joint after contact with it. The connection of the conductive block 12 to the inner surface of the tooth 110 includes the entire conductive block 12 being located on the inner surface of the tooth 110, and also includes a portion of the conductive block 12 being located on the inner surface of the tooth 110. When the lower end of the fork 11 has two opposing teeth 110, the conductive block 12 is preferably an L-shaped plate. The vertical structural plate of the conductive block 12 is attached to the side panel of the fork 11, while its horizontal structural plate is located between the teeth 110.

[0022] The first drive mechanism 2 mainly includes a first drive motor 21 and a drive arm 22. In this embodiment, the drive arm 22 is a horizontal D-shaped structure, including a semi-circular arc arm 222 and a straight rod arm 221 connected to the opening side of the arc arm 222. The drive shaft of the first drive motor 21 is drivenly connected to the arc arm 222. The upper end of the shift fork 11 is connected to the straight rod arm 221 and moves with the horizontal movement of the straight rod arm 221. The drive arm 22 adopts a horizontal D-shaped structure, which can easily drive the shift fork 11 to move horizontally in both left and right directions. The structure is simple, reliable, and stable in operation. In this embodiment, the first drive mechanism 2 also includes a sliding support block 25 with an overall L-shaped structure. The first drive motor 41 sits on the horizontal structural block of the sliding support block 25. The vertical structural block of the sliding support block 25 is provided with a cross-shaped protrusion 251, and the shift fork 11 is engaged with the horizontal plate of the protrusion 251 through a slot on the main body. At this point, the protrusion 251 can both support the shift fork 11 and provide a track for the shift fork 11 to slide. With this structural design, there is no need to design other support structures for the shift fork 11, the structure is compact, and the accuracy of the welding point shifting action can be improved.

[0023] The working principle of the cable cold solder joint detection device provided in this embodiment is as follows: The top of the tooth 110 contacts the side of the solder joint in the junction box to be inspected. The first drive motor 21 drives the arc arm 222 to move horizontally. The fork 11 moves horizontally with the straight arm 221, and then the top of the tooth 110 moves the solder joint. If the solder joint is solid, the force applied to the side of the solder joint by the top of the tooth 110 cannot pry the solder joint open, but will pass over the surface in contact with the solder joint. If the solder joint is cold solder joint, the force applied to the side of the solder joint by the top of the tooth 110 will cause the solder joint to be pried open. The end of the wire after the solder joint is broken is lifted up by the horizontal movement of the tooth 110. After the end of the wire is lifted to a predetermined height, it contacts the conductive block 12 located above the tooth 110. The detection device connected to the outside through the conductive block 12 can be used to determine that the solder joint is cold solder joint.

[0024] The cable cold solder joint detection device provided in this embodiment uses a conductive block with current conduction above the pick teeth near the solder joint. The cold solder joint can be confirmed when the end of the picked wire comes into contact with the conductive block. The structure is simple and easy to operate. It solves the problems of complex mechanism, cumbersome calculation and discrimination process and high cost caused by the use of vision equipment for cold solder joint detection in the prior art by physical means. It greatly improves the detection accuracy and response speed of the detection mechanism, while reducing the overall cost of the detection device. Example

[0025] This embodiment 2 is based on embodiment 1. An elastic element is incorporated into the drive mechanism to replace the direct fastening connection between the straight arm and the shift fork. Flexible drive reduces damage to the weld joints caused by the shift teeth. Furthermore, a pressure sensor is installed to preset the shifting force applied to the weld joint while recording the destructive force that the weak weld joint can withstand. This facilitates effective feedback to upstream welding processes, improving production line efficiency and product qualification rate. Specifically: Reference Figure 3 As shown, the first drive mechanism 2 also includes elastic elements 23, which are compression springs in this embodiment. Two elastic elements 23 are sleeved on the straight arm 221 and are located on both sides of the shift fork 11. One end of the elastic element 23 is fastened to the end face of the arc arm 222, and the other end is connected to the side of the shift fork 11. The elastic element 23 located between the ends of the shift fork 11 and the arc arm 222 is in a compressed state. The shift fork 11 is kept in a balanced state by the two elastic elements 23 located on both sides. At this time, the connection between the shift fork 11 and the straight arm 221 changes from a fixed connection to a sliding connection. After the elastic elements 23 are provided on the first drive mechanism 2, when the first drive motor 21 drives the arc arm 222 to move horizontally left and right, the shift fork 11, which is slidably connected to the straight arm 221, is displaced horizontally by the elastic force applied by the elastic elements 23. By adjusting the degree of compression of the elastic element 23, the force driving the shift fork 11 can reach a predetermined range, thereby ensuring that the force applied to the weld point after the shift tooth 110 contacts the weld point to be inspected reaches a predetermined range, thus avoiding damage or destruction to the actual weld point under hard contact.

[0026] Furthermore, the first drive mechanism 2 also includes pressure sensors 24. There are two sets of pressure sensors 24, each sleeved onto the straight arm 221. An elastic element 23 is pressed between the pressure sensors 24 and the shift fork 11, which remains slidably connected to the straight arm 221. The pressure sensors 24 can directly obtain the horizontal thrust applied by the elastic element 23 to the shift fork 11. This allows for adjustment of the compression of the elastic element 23 according to preset requirements, thereby regulating the elastic force. Furthermore, it allows for real-time acquisition of the destructive force when a weak weld point is dislodged, facilitating effective feedback to the upstream welding process. Example

[0027] This embodiment 3 is based on embodiment 1 or 2. By optimizing the design of the shift fork into a relatively sliding split structure and installing a corresponding displacement sensor at the upper end, it achieves two advantages: firstly, vertical sliding ensures soft contact between the shift teeth and the solder joint; secondly, the vertical movement distance determines whether a shifting action is required, reducing damage to the cable solder joint and effectively improving detection efficiency. Specifically: Reference Figure 4-5As shown, the shift fork 11 mainly consists of a fixed slider 111 and a movable slider 112. The fixed slider 111 is a rectangular prism with a slot on one side for sliding connection with the protrusion 251, and a vertically open groove with a convex cross-section on the opposite side. The movable slider 112 has a vertically sliding strip with a convex cross-section. The movable slider 112 is slidably connected to the vertical groove of the fixed slider 111 via the vertical strip, achieving a sliding connection. The fixed slider 111 is suspended from the straight arm 221. When the elastic element 23 is present, the fixed slider 111 is slidably connected to the straight arm 221. The lower end of the movable slider 112 forms a shift tooth 110, while its upper end has an L-shaped hook head 1121. The horizontal plate of the L-shaped hook head 1121 is engaged with the upper end face of the fixed slider 111. This structural design allows the movable slider 112 to slide upward automatically after the tip of the pick tooth 110 contacts the solder joint to be inspected, thus avoiding excessive pressure on the solder joint and causing damage.

[0028] Furthermore, a displacement sensor 113 is provided at the upper end of the fixed slider, and the displacement sensor 113 is located on one or both sides of the hook head 1121. When the pick tooth 110 contacts the welding point, the movable slider 112 will slide upward due to the contact with the welding point. When the displacement sensor 113 detects that the movable slider 112 has moved upward a predetermined distance, it can determine that the contact is in place, and then the welding point agitation detection will begin.

[0029] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A device for detecting cold solder joints in ribbon cables, characterized in that, It includes a detection component (1) and a first drive mechanism (2); The inspection assembly (1) includes a fork (11) and a conductive block (12). The lower end of the fork (11) is provided with a tooth (110). The conductive block (12) is connected to the inner side of the tooth (110). The inner side of the tooth (110) refers to the side of the tooth (110) that moves the solder joint after it comes into contact with the solder joint to be inspected. The upper end of the fork (11) is driven to connect to the first driving mechanism (2). The first driving mechanism (2) drives the fork (11) to move horizontally. The end of the tooth (110) is used to move the solder joint. When there is a false solder joint, the solder wire that is moved and lifted by the tooth (110) contacts the conductive block (12) and conducts a connection.

2. The cable solder joint detection device according to claim 1, characterized in that, The lower end of the fork (11) is provided with two teeth (110), which are arranged at intervals. The conductive block (12) is an L-shaped plate, and the horizontal part of the conductive block (12) is located between the two teeth (110).

3. The cable solder joint detection device according to claim 1, characterized in that, The first drive mechanism (2) includes a first drive motor (21) and a drive arm (22). The drive arm (22) is horizontally D-shaped. The drive arm (22) includes a straight arm (221) and an arc arm (222). The upper end of the shift fork (11) is sleeved on the straight arm (221). The first drive motor (21) drives the arc arm (222).

4. The cable solder joint detection device according to claim 3, characterized in that, The first drive mechanism (2) further includes an elastic element (23), the shift fork (11) is slidably connected to the straight arm (221), the two elastic elements (23) are respectively sleeved on the straight arm (221), and the elastic element (23) is pressed between the shift fork (11) and the end of the arc arm (222).

5. The cable solder joint detection device according to claim 4, characterized in that, The first drive mechanism (2) further includes pressure sensors (24), two pressure sensors (24) are respectively sleeved on the straight rod arm (221), and the elastic element (23) is pressed between the pressure sensors (24) and the shift fork (11).

6. The cable solder joint detection device according to claim 5, characterized in that, The first drive mechanism (2) further includes a sliding support block (25), which is in the shape of an L-shape. The first drive motor (21) is located on the horizontal block of the sliding support block (25). The vertical block of the sliding support block (25) is provided with a protrusion (251). The fork (11) is supported and connected to the protrusion (251) and can slide horizontally.

7. The cable solder joint detection device according to any one of claims 3-6, characterized in that, The shift fork (11) includes a fixed slider (111) and a movable slider (112). The fixed slider (111) is connected to the drive arm (22). The movable slider (112) is vertically slidable along the fixed slider (111). The shift tooth (110) is located at the lower end of the movable slider (112). The upper end of the movable slider (112) is provided with a hook (1121), which is engaged with the upper end of the fixed slider (111).

8. The cable solder joint detection device according to claim 7, characterized in that, A displacement sensor (113) is provided at the upper end of the fixed slider (111), and the displacement sensor (113) is used to obtain the distance that the hook (1121) moves upward.

9. A testing device for junction boxes used in photovoltaic modules, characterized in that, Includes the cable solder joint detection device as described in any one of claims 1-8.

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