Conveying line square battery short circuit automatic detection device

Abstract

The utility model relates to a conveying line square battery short circuit automatic detection device which is composed of a blocking and jacking positioning mechanism, a short circuit detection mechanism, a defective product removing mechanism and a classification caching mechanism, in the working process, a tray carries a square battery to a detection station, and after being blocked, the square battery is triggered to be jacked and positioned through photoelectric induction; the short-circuit detection mechanism is in contact with a battery through a probe, a PLC controls a short-circuit tester to complete detection, if a short circuit is found, the collaborative robot grabs defective products and places the defective products to the classification caching mechanism, and the tray is released after detection, the automation degree is high, safety accidents caused by the short circuit can be effectively prevented, the detection efficiency is greatly improved, the labor cost is reduced, and the reliability is high. An efficient and reliable solution is provided for short circuit detection of the square battery in the production, transportation and storage processes, and the method is suitable for the field of square battery production and logistics automation.

Description

Technical Field

[0001] This utility model relates to the field of square battery production and logistics automation technology, and in particular to an automatic short-circuit detection device for square batteries on a conveyor line. Background Technology

[0002] Short circuits in prismatic batteries are a significant cause of safety accidents during production, transportation, and storage. Traditional manual inspection methods are not only inefficient and lack accuracy and consistency, but also increase safety hazards. Therefore, developing a device that can automatically detect short circuits in prismatic batteries and quickly process defective products is crucial. Utility Model Content

[0003] To address the technical problems existing in the background art, this utility model proposes an automatic short-circuit detection device for square batteries in a conveyor line.

[0004] This utility model proposes an automatic short-circuit detection device for square batteries in a conveyor line, characterized in that it includes:

[0005] A blocking and lifting positioning mechanism is installed on the conveyor line (1) to block and fix the trays loaded with square batteries;

[0006] A short-circuit detection mechanism is used to detect whether a square battery is short-circuited.

[0007] The defective product rejection mechanism is used to pick up short-circuited defective square batteries;

[0008] The defective product sorting and caching mechanism is used to store and classify defective square batteries.

[0009] Preferably, the blocking and lifting positioning mechanism includes a blocking mechanism and a lifting positioning mechanism; the adjustable fixing plate of the blocking mechanism is connected to the conveyor line through a fixed connector, and the blocking cylinder is mounted on the adjustable fixing plate with its piston rod facing the pallet movement direction to block the pallet;

[0010] The base plate of the lifting and positioning mechanism is fixed below the corresponding work station of the conveyor line. The guide shaft is vertically installed on the base plate. The positioning pin is set between the guide shafts and fixedly connected to the base plate. The cylinder body of the lifting and positioning cylinder is fixed to the base plate. Its piston rod is connected to the contact surface of the pallet. The rubber pad is laid on the contact part between the pallet and the lifting and positioning mechanism.

[0011] This mechanism is used to block trays loaded with square batteries at short-circuit detection stations and defective product rejection stations. After the tray is detected to be in place by a photoelectric sensor connected to the conveyor line, the lifting and positioning cylinder lifts and fixes the tray.

[0012] Preferably, the blocking and lifting positioning mechanism further includes a magnetic induction switch, which is installed on the cylinder body of the lifting positioning cylinder and connected to the PLC via a circuit to monitor the extension and retraction status of the lifting positioning cylinder.

[0013] Preferably, the short-circuit detection mechanism includes a probe plate, a short-circuit detection lifting cylinder, and a short-circuit tester. The cylinder body of the short-circuit detection lifting cylinder is fixed to the frame structure above the short-circuit detection station by a mounting bracket. Its piston rod is fixedly connected to the probe plate. One end of the guide column is fixed to the support plate at the top of the frame structure, and the other end passes through the guide hole on the probe plate, which constrains the vertical movement of the probe plate. Each set of probes is installed on the probe plate and contacts the positive electrode, negative electrode, and casing of the square battery to be tested, respectively. The connection sequence of the probes and the short-circuit tester is controlled by the circuit connection between the PLC and the short-circuit tester, and the short-circuit tester is detected sequentially to detect whether there is a short circuit between the positive and negative electrodes of the square battery and between the positive and negative electrodes and the casing.

[0014] Preferably, the short-circuit detection mechanism further includes a relay group, which is connected to the PLC, probe and short-circuit tester through circuits. The PLC controls the conduction sequence of the relay group to realize the detection of square batteries one by one.

[0015] Preferably, the defective product rejection mechanism includes a collaborative robot, which is fixed to the ground or support structure near the defective product rejection station via its base. The gripper of the collaborative robot is connected to the end of the robot's robotic arm via a connecting component. The collaborative robot is connected to a PLC via a communication line, receives the detection results sent by the PLC, identifies and uses the gripper to pick up short-circuited defective square batteries.

[0016] Preferably, the defective product sorting and buffering mechanism includes a buffer conveyor belt, a support frame of which is fixed to the ground, a photoelectric sensor installed on the support frame at the beginning of the buffer conveyor belt with its sensing direction facing the surface of the conveyor belt, a conveyor belt motor connected to the drive roller of the buffer conveyor belt through a transmission device to drive the conveyor belt, multiple sorting channels separated by guide strips on the buffer conveyor belt, the guide strips being installed on the buffer conveyor belt through guide strip fixing frames, the guide strip fixing frames being adjustable to adjust the gap between each channel for placing defective square batteries onto the buffer conveyor belt, and the photoelectric sensor controlling the conveyor belt motor to transport the square batteries to the rear end after sensing the presence of material, leaving space for unloading. The defective product sorting and buffering mechanism also includes a sorting labeling device installed at the beginning of each sorting channel of the buffer conveyor belt for marking different categories of defective square batteries for subsequent processing.

[0017] Preferably, it also includes a control system, which integrates the control logic of PLC, HMI and collaborative robot, and connects the actuators and sensors of each mechanism through communication lines and circuits to realize the automated control of the entire detection process.

[0018] Preferably, the control system further includes a fault diagnosis and warning module, which is connected to the sensors and actuators of each mechanism through a data acquisition line to monitor the operating status of the device in real time and promptly detect and handle faults.

[0019] The automatic short-circuit detection device for square batteries in a conveyor line proposed in this utility model has the following beneficial effects:

[0020] 1. Improved safety: Automated detection effectively prevents safety accidents caused by short circuits in square batteries.

[0021] 2. Improved efficiency: Automated processes reduce manual intervention and significantly improve testing efficiency.

[0022] 3. Reduce costs: Reduce manpower requirements, optimize resource allocation, and lower operating costs.

[0023] 4. High reliability: Integrated design ensures accurate testing, providing an efficient and reliable solution for the transportation and storage of square batteries.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 A schematic diagram of an automatic short-circuit detection device for square batteries on a conveyor line;

[0026] Figure 2 A schematic diagram of a short-circuit detection station for an automatic short-circuit detection device for square batteries on a conveyor line;

[0027] Figure 3 A schematic diagram of a defective product classification and buffer for an automatic short-circuit detection device for square batteries on a conveyor line;

[0028] Figure 4 A schematic diagram of the blocking and lifting positioning mechanism of an automatic short-circuit detection device for square batteries in a conveyor line;

[0029] The following are the labels in the diagram: 1. Conveyor line; 2. Blocking mechanism; 3. Lifting and positioning mechanism; 4. Photoelectric sensor; 5. Mounting bracket; 6. Lifting cylinder; 7. Guide column; 8. Support plate; 9. Probe plate; 10. HMI; 11. Probe; 12. Collaborative robot; 13. Gripper; 14. Support frame; 15. Guide bar; 16. Guide bar fixing frame; 17. Conveyor belt; 18. Conveyor belt motor. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] like Figures 1-4 The automatic short-circuit detection device for square batteries on a conveyor line shown is characterized by comprising:

[0032] A blocking and lifting positioning mechanism is installed on the conveyor line 1 to block and fix the tray loaded with square batteries.

[0033] A short-circuit detection mechanism is used to detect whether a square battery is short-circuited.

[0034] The defective product rejection mechanism is used to pick up short-circuited defective square batteries;

[0035] The defective product sorting and caching mechanism is used to store and classify defective square batteries.

[0036] Preferably, the blocking and lifting positioning mechanism includes a blocking mechanism 2 and a lifting positioning mechanism 3; the adjustable fixing plate of the blocking mechanism 2 is connected to the conveyor line 1 through a fixed connector, and the blocking cylinder is installed on the adjustable fixing plate with its piston rod facing the pallet movement direction to block the pallet;

[0037] The base plate of the lifting and positioning mechanism 3 is fixed below the corresponding work station of the conveyor line 1. The guide shaft is vertically installed on the base plate. The positioning pin is set between the guide shafts and fixedly connected to the base plate. The cylinder body of the lifting and positioning cylinder is fixed to the base plate. Its piston rod is connected to the contact surface of the pallet. The rubber pad is laid on the contact part between the pallet and the lifting and positioning mechanism 3.

[0038] This mechanism is used to block the trays loaded with square batteries at the short circuit detection station and the defective product rejection station. After the photoelectric sensor 4 connected to the conveyor line 1 detects that the tray is in place, the lifting and positioning cylinder lifts and fixes the tray.

[0039] Preferably, the blocking and lifting positioning mechanism 3 further includes a magnetic induction switch, which is installed on the cylinder body of the lifting positioning cylinder and connected to the PLC via a circuit to monitor the extension and retraction status of the lifting positioning cylinder.

[0040] Preferably, the short-circuit detection mechanism includes a probe plate 9, a short-circuit detection lifting cylinder 6, and a short-circuit tester. The cylinder body of the short-circuit detection lifting cylinder 6 is fixed to the frame structure above the short-circuit detection station by a mounting bracket 5. Its piston rod is fixedly connected to the probe plate 9. One end of the guide column 7 is fixed to the support plate 8 at the top of the frame structure, and the other end passes through the guide hole on the probe plate 9, which constrains the vertical movement of the probe plate 9. Each set of probes 11 is installed on the probe plate 9 and contacts the positive electrode, negative electrode, and casing of the square battery to be tested, respectively. Through the circuit connection between the PLC and the short-circuit tester and the probe plate 9, the connection sequence of the probes 11 and the short-circuit tester is controlled to detect whether there is a short circuit between the positive and negative electrodes of the square battery and between the positive and negative electrodes and the casing.

[0041] Preferably, the short-circuit detection mechanism further includes a relay group, which is connected to the PLC, probe and short-circuit tester through circuits. The PLC controls the conduction sequence of the relay group to realize the detection of square batteries one by one.

[0042] Preferably, the defective product rejection mechanism includes a collaborative robot 12, which is fixed to the ground or support structure near the defective product rejection station via its base. The gripper 13 of the collaborative robot 12 is connected to the end of the robot's robotic arm via a connecting component. The collaborative robot 12 is connected to a PLC via a communication line, receives the detection results sent by the PLC, identifies and uses the gripper 13 to pick up short-circuited defective square batteries.

[0043] Preferably, the defective product sorting and buffering mechanism includes a buffer conveyor belt 17, a support frame 14 of which is fixed to the ground. A photoelectric sensor 4 is installed on the support frame 14 at the starting end of the buffer conveyor belt 17, with its sensing direction facing the surface of the conveyor belt 17. A conveyor belt motor 18 is connected to the drive roller of the buffer conveyor belt 17 through a transmission device to drive the conveyor belt 17. Multiple sorting channels are separated on the buffer conveyor belt 17 by guide bars 15. The guide bars 15 are installed on the buffer conveyor belt 17 through guide bar fixing frames 16. The guide bar fixing frames 16 can adjust the gap between each channel to place defective square batteries onto the buffer conveyor belt 17. After the photoelectric sensor 4 senses the presence of material, it controls the conveyor belt motor 18 to transport the square batteries to the rear end, leaving space for unloading. The defective product sorting and buffering mechanism also includes a sorting labeling device, which is installed at the starting end of each sorting channel of the buffer conveyor belt 17 to mark different categories of defective square batteries for subsequent processing.

[0044] Preferably, it also includes a control system, which integrates the control logic of PLC, HMI10 and collaborative robot12, and connects the actuators and sensors of each mechanism through communication lines and circuits to realize the automated control of the entire detection process.

[0045] Preferably, the control system further includes a fault diagnosis and warning module, which is connected to the sensors and actuators of each mechanism through a data acquisition line to monitor the operating status of the device in real time and promptly detect and handle faults.

[0046] Workflow:

[0047] The tray carrying the square battery moves along the conveyor line to the short circuit detection station, where it is blocked by the blocking mechanism 2.

[0048] After the photoelectric sensor 4 senses the tray in place, the lifting and positioning cylinder is activated to fix the tray.

[0049] The short-circuit detection lifting cylinder 6 drives the probe plate 9 to descend, and the probe contacts the square battery.

[0050] The PLC controls the short-circuit detection sequence, and the short-circuit tester detects and records the data.

[0051] The PLC sends the inspection results to the HMI10 for display and simultaneously sends them to the downstream defective product rejection collaborative robot 12.

[0052] After the inspection is completed, the pallet is released, the defective product rejection mechanism is activated, and the collaborative robot 12 grabs the defective square batteries and sorts and stores them.

[0053] After all defective products are removed, the pallet continues to move forward.

[0054] Working principle:

[0055] The tray position and cylinder status are monitored by sensors such as photoelectric sensor 4 and magnetic induction switch. The PLC acts as the control center, controlling the cylinder actions, probe detection sequence, and defective product handling according to a preset program. The data collected by the short-circuit tester is processed by the PLC and used not only for real-time display and judgment but also to guide the operation of the collaborative robot 12, achieving accurate rejection and classified storage of defective products.

[0056] Equipment installation and commissioning

[0057] When installing the detection device, first ensure the stability and flatness of the conveyor line 1. Securely connect the adjustable fixing plate of the blocking and lifting positioning mechanism 3 to the corresponding position on the conveyor line 1 according to design requirements. Install and adjust the blocking cylinder to ensure it accurately blocks the pallet. Next, install the base plate of the lifting positioning mechanism 3 below the conveyor line 1, vertically fix the guide shaft, insert the positioning pin, connect the lifting positioning cylinder, lay the rubber pad, adjust it to the appropriate position, install and calibrate the photoelectric sensor 4 and the magnetic induction switch to accurately sense the pallet position and cylinder status, and accurately transmit the signal to the PLC.

[0058] Regarding the short-circuit detection mechanism, a stable frame structure is erected above the short-circuit detection station. The short-circuit detection lifting cylinder 6 is fixed by the mounting bracket 5, the piston rod is connected to the probe plate 9, and the guide column 7 is inserted to ensure that the probe plate 9 can be raised and lowered vertically and smoothly. Each set of probes is installed, and the circuit between the PLC, the short-circuit tester, and the relay group is connected. The conduction sequence is adjusted to ensure accurate detection of battery short circuits.

[0059] The collaborative robot 12 of the defective product rejection mechanism has its base fixed on a stable ground or support structure near the defective product rejection station, according to the actual space and operational requirements. The gripper 13 is installed and its gripping force and accuracy are adjusted to ensure accurate picking up of defective square batteries. Simultaneously, a communication line is established to achieve stable communication between the collaborative robot 12 and the PLC.

[0060] For the defective product sorting and buffering mechanism, install the support frame 14 of the buffer conveyor belt 17 in a suitable position, fix the conveyor belt 17, install the photoelectric sensor 4, the motor 18 of the conveyor belt 17 and the transmission device, and adjust the speed of the motor 18 and the sensitivity of the photoelectric sensor. Install the guide strip 15 and the guide strip 15 fixing frame, adjust the gap of each channel according to the size of common defective square batteries, and finally install the sorting label device.

[0061] After the hardware installation is completed, the entire control system is debugged, and the control logic of the PLC, HMI10 and collaborative robot 12 is integrated and optimized to ensure that the various mechanisms work together and realize the automated testing process.

[0062] Daily Work Process

[0063] Battery conveying and positioning: The tray loaded with square batteries moves at a constant speed along the conveyor line. When it reaches the short-circuit detection station, the blocking cylinder quickly extends, stopping the tray from moving forward. At this time, the photoelectric sensor 4 installed on conveyor line 1 senses the tray's arrival signal and immediately transmits the signal to the PLC. After receiving the signal, the PLC controls the lifting and positioning cylinder to operate. The piston rod of the lifting and positioning cylinder extends upward, pushing the tray up so that the tray and positioning pin are precisely engaged. At the same time, the rubber pad makes close contact with the tray, providing cushioning and anti-slip effects, ensuring that the tray does not shift during the detection process, providing a stable foundation for subsequent accurate detection.

[0064] Short-circuit detection: After the tray is fixed, the PLC controls the short-circuit detection lifting cylinder 6 to operate. The piston rod of the short-circuit detection lifting cylinder 6 drives the probe plate 9 to descend vertically. The guide column 7 constrains the descent of the probe plate 9, ensuring a smooth descent so that each set of probes accurately contacts the positive and negative terminals and the casing of the square battery under test. The PLC controls the conduction sequence of the relay group, connecting the probes to the short-circuit tester in sequence. Short-circuit detection is performed between the positive and negative terminals and between the positive and negative terminals and the casing of the square battery according to the preset detection sequence. The short-circuit tester transmits the detected data to the PLC in real time, and the PLC analyzes and processes the data.

[0065] Defective Product Rejection and Classification Buffer: The PLC determines whether the square battery is short-circuited based on the detection results. If a short-circuited defective square battery is detected, the result is immediately sent to the downstream defective product rejection collaborative robot 12 via the communication line. After receiving the signal, the collaborative robot 12 controls the robotic arm to move the gripper 13 accurately above the defective square battery according to the preset motion trajectory and gripping program. The position and angle of the gripper (13) are adjusted to grip the defective square battery. Then, the collaborative robot 12 transports the defective square battery to the buffer conveyor belt 17 of the defective product classification buffer mechanism. When the defective square battery is placed on the buffer conveyor belt 17, the photoelectric sensor 4 located on the support frame 14 at the starting end of the buffer conveyor belt 17 senses the presence of material and then controls the conveyor belt motor 18 to start. The drive roller of the buffer conveyor belt 17 is driven by the transmission device to transport the defective square battery to the rear end. During the transport process, the defective square battery is guided to the corresponding classification channel by the guide bar 15 according to different categories. The classification labeling device marks the defective square batteries of different categories for convenient subsequent unified processing.

[0066] Pallet Release and Circulation: After the inspection and rejection of defective square batteries on a pallet are completed, the PLC controls the retraction of the blocking cylinder, releasing the pallet. The pallet continues to move along the conveyor line to enter the next workflow. Meanwhile, the inspection device continues to wait for the next pallet loaded with square batteries, repeating the above inspection and processing process to achieve continuous automated operation.

[0067] Maintenance and troubleshooting

[0068] During routine maintenance, regularly inspect the mechanical components of each mechanism, such as whether the piston rod of the cylinder is worn, whether the gripping force of the gripper 13 is normal, and whether the guide shaft is smooth. If any problems are found, replace or repair them promptly. Check the sensing accuracy of each sensor, such as photoelectric sensor 4 and magnetic induction switch, to ensure that they can accurately sense signals. At the same time, regularly check the electrical connection lines to prevent problems such as aging or loosening of the lines from affecting the normal operation of the equipment.

[0069] When equipment malfunctions, the control system's fault diagnosis and warning module monitors the status of sensors and actuators in each mechanism in real time via data acquisition lines. Upon detecting an anomaly, it immediately issues a warning signal and displays fault information on the HMI10. Operators can quickly locate the fault point and perform appropriate repairs based on the fault indications. For example, if the short-circuit detection mechanism malfunctions, it may be due to probe wear, a faulty short-circuit tester, or a circuit connection problem. Maintenance personnel can check the probes, testing instruments, and wiring based on the fault diagnosis information, promptly repair the fault, and ensure the equipment returns to normal operation as quickly as possible.

[0070] It should be understood that the 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 this utility model 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 utility model.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0073] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic short-circuit detection device for square batteries in a conveyor line, characterized in that, include: A blocking and lifting positioning mechanism is installed on the conveyor line (1) to block and fix the trays loaded with square batteries; A short-circuit detection mechanism is used to detect whether a square battery is short-circuited. The defective product rejection mechanism is used to pick up short-circuited defective square batteries; The defective product sorting and caching mechanism is used to store and classify defective square batteries.

2. The automatic short-circuit detection device for square batteries on a conveyor line according to claim 1, characterized in that, The blocking and lifting positioning mechanism includes a blocking mechanism (2) and a lifting positioning mechanism (3); the adjustable fixing plate of the blocking mechanism (2) is connected to the conveyor line (1) through a fixed connector, and the blocking cylinder is installed on the adjustable fixing plate with its piston rod facing the pallet movement direction to block the pallet; The base plate of the lifting and positioning mechanism (3) is fixed below the corresponding work station of the conveyor line (1). The guide shaft is vertically installed on the base plate. The positioning pin is set between the guide shaft and fixedly connected to the base plate. The cylinder body of the lifting and positioning cylinder is fixed to the base plate. Its piston rod is connected to the contact surface of the pallet. The rubber pad is laid on the contact part between the pallet and the lifting and positioning mechanism (3). The mechanism is used to block the trays loaded with square batteries at the short circuit detection station and the defective product rejection station. After the photoelectric sensor (4) connected to the conveyor line (1) detects that the tray is in place, the lifting and positioning cylinder lifts and fixes the tray.

3. The automatic short-circuit detection device for square batteries on a conveyor line according to claim 2, characterized in that, The blocking and lifting positioning mechanism (3) also includes a magnetic induction switch, which is installed on the cylinder body of the lifting positioning cylinder and connected to the PLC via a line to monitor the extension and retraction status of the lifting positioning cylinder.

4. The automatic short-circuit detection device for square batteries on a conveyor line according to claim 1, characterized in that, The short-circuit detection mechanism includes a probe plate (9), a short-circuit detection lifting cylinder (6), and a short-circuit tester. The cylinder body of the short-circuit detection lifting cylinder (6) is fixed on the frame structure above the short-circuit detection station by a mounting bracket (5). Its piston rod is fixedly connected to the probe plate (9). One end of the guide column (7) is fixed to the support plate (8) at the top of the frame structure, and the other end passes through the guide hole on the probe plate (9) to constrain the vertical movement of the probe plate (9). Each set of probes (11) is installed on the probe plate (9) and contacts the positive electrode, negative electrode, and shell of the square battery to be tested, respectively. Through the circuit connection between the PLC and the short-circuit tester and the probe plate (9), the connection sequence of the probes (11) and the short-circuit tester is controlled to detect whether there is a short circuit between the positive and negative electrodes of the square battery and between the positive and negative electrodes and the shell.

5. The automatic short-circuit detection device for square batteries on a conveyor line according to claim 4, characterized in that, The short-circuit detection mechanism also includes a relay group, which is connected to a PLC, a probe and a short-circuit tester via circuits. The PLC controls the conduction sequence of the relay group to realize the detection of square batteries one by one.

6. The automatic short-circuit detection device for square batteries on a conveyor line according to claim 1, characterized in that, The defective product rejection mechanism includes a collaborative robot (12), which is fixed to the ground or support structure near the defective product rejection station via its base. The gripper (13) of the collaborative robot (12) is connected to the end of the robot's robotic arm via a connecting component. The collaborative robot (12) is connected to the PLC via a communication line, receives the detection results sent by the PLC, identifies and uses the gripper (13) to grab short-circuited defective square batteries.

7. The automatic short-circuit detection device for square batteries on a conveyor line according to claim 1, characterized in that, The defective product sorting and buffering mechanism includes a buffer conveyor belt (17), a support frame (14) of the buffer conveyor belt (17) fixed to the ground, a photoelectric sensor (4) installed on the support frame (14) at the starting end of the buffer conveyor belt (17) with its sensing direction facing the surface of the conveyor belt (17), a conveyor belt motor (18) connected to the drive roller of the buffer conveyor belt (17) through a transmission device to drive the conveyor belt (17) to operate, and multiple sorting channels are separated on the buffer conveyor belt (17) by guide bars (15), the guide bars (15) passing through The guide bar fixing frame (16) is installed on the buffer conveyor belt (17). The guide bar fixing frame (16) can adjust the gap size of each channel to place defective square batteries on the buffer conveyor belt (17). After the photoelectric sensor (4) senses the presence of material, it controls the conveyor belt motor (18) to transport the square batteries to the rear end, leaving a material placement position. The defective product classification buffer mechanism also includes a classification labeling device. The classification labeling device is installed at the beginning of each classification channel of the buffer conveyor belt (17) to mark different categories of defective square batteries for subsequent processing.

8. An automatic short-circuit detection device for square batteries on a conveyor line according to any one of claims 1-7, characterized in that, It also includes a control system, which integrates the control logic of PLC, HMI (10) and collaborative robot (12), and connects the execution components and sensors of each mechanism through communication lines and circuits to realize the automated control of the entire detection process.

9. The automatic short-circuit detection device for square batteries on a conveyor line according to claim 8, characterized in that, The control system also includes a fault diagnosis and warning module, which is connected to the sensors and actuators of each mechanism through data acquisition lines to monitor the operating status of the device in real time and promptly detect and handle faults.

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