Welding seam detection equipment for solid-state battery

Abstract

The welding seam detection equipment comprises a workbench and an external industrial personal computer, a processor connected with the industrial personal computer is integrated on the workbench, a back plate is fixedly installed on the top of the workbench, an installation frame is slidably connected to the back plate, a servo motor is fixedly installed on the front face of the back plate, and a welding seam is arranged on the servo motor. A lead screw is fixedly connected to an output shaft of the servo motor, the mounting frame is in threaded connection to the lead screw, and a first electric guide rail is fixedly mounted on the right side of the mounting frame. A baffle plate and a sealing plate of the positioning assembly and a partition plate of the auxiliary assembly cooperate to form a relatively closed small space, dust, impurities and electromagnetic interference are isolated, energy leakage is prevented, a stable and pure environment is provided for detection, the detection precision is further improved, the positioning assembly stabilizes and limits the battery, and the auxiliary assembly adjusts the temperature around the battery through the partition plate. Through cooperation of the two, temperature adjustment is more uniform and effective, and detection quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of weld detection, and more specifically, to a weld detection device for solid-state batteries. Background Art

[0002] In the production process of solid-state batteries, weld quality inspection is a key link to ensure the sealing and safety of batteries. Traditional weld inspection methods are mostly contact inspections, which have many disadvantages. For example, it is easy to introduce human errors, and it is difficult to accurately detect defects such as incomplete welds, pores or cracks when inspecting sealing pin welds and sealing welds. With the development of technology, laser ultrasonic non-contact weld inspection technology has gradually attracted attention. During the inspection process, the laser penetrates the weld to generate ultrasonic vibration signals, which can avoid the errors that may be caused by traditional contact inspection. However, the existing inspection equipment based on this technology still has some problems in practical applications.

[0003] In the actual operation of the detection equipment, the accuracy of the optical path has a crucial impact on the detection accuracy; during the equipment debugging stage, the optical path needs to be accurately adjusted to ensure that the laser can accurately act on the detection area. At the same time, when testing square aluminum shell batteries of different sizes, the equipment needs to have good adaptability, including the adjustment of the detection position and the positioning of the battery. In addition, the detection environment will also affect the detection results. For example, factors such as magnetic field interference and temperature changes may reduce the detection accuracy.

[0004] In the existing detection equipment, the comprehensive solutions to the above problems are not perfect enough. For example, in terms of optical path adjustment, there is a lack of systematic and precise adjustment methods; in terms of adapting to the detection of batteries of different sizes, there is a lack of flexible and effective adjustment mechanisms; in terms of the detection environment, there is a lack of effective improvement measures. In addition, when placing the battery on the table during detection, it is easy to affect the laser energy and cause weld wear, affecting the detection accuracy. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a weld detection device for solid-state batteries to solve the problem that the prior art lacks a flexible and effective adjustment mechanism and a systematic and precise adjustment method in detection, thereby affecting the detection accuracy.

[0006] To achieve the above object, the present invention adopts the following technical solution: A weld detection device for a solid-state battery comprises a workbench and an external industrial computer, wherein a processor connected to the industrial computer is integrated on the workbench, a back plate is fixedly installed on the top of the workbench, a mounting frame is slidably connected to the back plate, a servo motor is fixedly installed on the front of the back plate, a lead screw is fixedly connected to the output shaft of the servo motor, the mounting frame is threadedly connected to the lead screw, an electric guide rail 1 is fixedly installed on the right side of the mounting frame, a first movable module and a second movable module are slidably installed on the electric guide rail 1, an electric guide rail 2 is fixedly installed on the top of the workbench, a storage rack is slidably installed on the electric guide rail 2, the first movable module and the second movable module are respectively located at the top and the bottom of the storage rack, the first movable module and the second movable module are both connected to the processor, a through slot is opened on the top of the storage rack, two electric guide rails 3 are fixedly installed on the bottom of the storage rack, a movable frame is arranged inside the through slot, the movable frame is slidably mounted on the electric guide rail 3, a positioning component is arranged on the movable frame, and an auxiliary component is arranged on the storage rack.

[0007] The first movable module includes a first carrier frame, which is slidably mounted on an electric guide rail. A vibrometer, a galvanometer galvanometer and a first condenser are provided on the first carrier frame. The vibrometer and the galvanometer galvanometer are mounted on the top of the first carrier frame, the galvanometer galvanometer is located on the right side of the vibrometer, and the first condenser is mounted on the bottom of the first carrier frame and directly below the galvanometer galvanometer.

[0008] The second movable module includes a second supporting frame, which is slidably mounted on an electric guide rail. A laser head, a half-wave polarizer and a second condenser are provided on the second supporting frame. The laser head and the half-wave polarizer are mounted on the top of the second supporting frame, the half-wave polarizer is located on the right side of the laser head, and the second condenser is mounted on the second supporting frame and is directly above the half-wave polarizer.

[0009] The positioning assembly includes two hollow boxes and two installation boxes, the two hollow boxes are respectively installed on the left and right sides of the movable frame, the installation box is installed on the top of the hollow box, the outer sides of the hollow box and the installation box are both equipped with air pumps connected to the interior thereof, a piston seat 1 arranged equidistantly is slidably installed on the inner wall of the hollow box, a support plate is fixedly connected to the piston seat 1, the other end of the support plate passes through and extends to the outside of the hollow box, a piston seat 2 evenly distributed is slidably connected to the inner wall of the installation box, a limiting structure is connected to the piston seat 2, the limiting structure passes through and extends to the outside of the installation box, two expansion grooves are provided on the inner wall of the movable frame, a sealing plate is slidably connected to the inner wall of the expansion groove, a micro motor is fixedly installed on the inner wall of the expansion groove, the output shaft of the micro motor is meshed with teeth on the sealing plate through a gear, the sealing plate is located at the top of the support plate, and the top of the sealing plate and the top of the support plate are both coated with a thermal insulation coating.

[0010] As a further description of the above technical solution: a micro push rod is fixedly installed on the bottom of the second carrier frame, an infrared ray head is fixedly installed on the top of the micro push rod, the infrared ray head is located on the right side of the laser head, an industrial camera is installed on the bottom of the movable frame, and the industrial camera is connected to the industrial computer.

[0011] As a further description of the above technical solution: protective covers are movably installed on the top of the first carrier frame and the second carrier frame, and air filter plates are installed on the top of the protective covers.

[0012] As a further description of the above technical solution: the auxiliary component includes a synchronization ring, which is slidably connected to the bottom of the rack, and an electric push rod is fixedly installed at the bottom of the rack, and the output end of the electric push rod is connected to the top of the synchronization ring, and the top of the synchronization ring is fixedly connected to evenly distributed metal-ceramic composite partitions, and the top of the metal-ceramic composite partitions penetrates and extends to the top of the rack, and electric heating plates are embedded in the metal-ceramic composite partitions on the front and back sides, and cavities are opened in the metal-ceramic composite partitions on the left and right sides, and semiconductor refrigeration plates are fixedly installed on the inner wall of the cavity, and the heat dissipation surface of the semiconductor refrigeration plate penetrates and extends to the outside of the metal-ceramic composite partition.

[0013] As a further description of the above technical solution: a first filter and a second filter are respectively installed on the top of the first carrier and the second carrier, and the first filter and the second filter are respectively located on the right side of the vibrometer and the laser head.

[0014] As a further description of the above technical solution: the top of the storage rack is fixedly connected with evenly distributed sealing columns, and the metal-ceramic composite partition and the sealing columns are subjected to sliding sealing treatment.

[0015] As a further description of the above technical solution: the limiting structure includes a sleeve, the sleeve is slidably connected to the inside of the installation box, a limiting rod is movably installed inside the sleeve, a pressure sensor is fixedly installed on the inner wall of the sleeve, and the pressure sensor is connected to the processor.

[0016] As a further description of the above technical solution: the laser head is externally connected to an energy meter and a display panel through a wiring harness.

[0017] Compared with the prior art, the advantages of the present invention are: The present invention adopts laser ultrasonic non-contact weld detection technology. The ultrasonic vibration signal can be accurately received and analyzed, avoiding the traditional contact detection error. It can accurately detect defects such as incomplete welds, pores, cracks, etc. The optical path adjustment ensures the linearity and accuracy of the optical path by drawing the optical path, setting the red light indicator and the reflector. Industrial cameras play a key role in the inspection process. They can determine whether the battery position is correct before inspection. If there is a deviation in the laser optical path or battery position during inspection, fine-tuning can be performed based on the camera feedback graphics. In combination with the positioning components, the positioning and limiting of square aluminum shell batteries of different specifications can be achieved, thus improving the practicality of the equipment. The positioning assembly has good adaptability to batteries of different sizes during the rough installation stage. When placing batteries, the movable frame can move horizontally. The air pressure of the hollow box and the installation box is controlled by the air pump, so that the support plate and the limit structure can move together. The pressure sensor of the limit structure can stop the air pump operation when the set value is reached according to the actual situation of the battery, effectively limit the position and avoid battery damage, and can adapt to batteries of various specifications; Multiple groups of support plates support the battery, and the surface is coated with a smooth heat-insulating coating. When positioning, the shielding plate can set the movement distance according to the battery specifications, shielding most of the space of the movable frame, exposing only the bottom of the battery, and cooperate with the sealing plate to form a relatively closed space to prevent the battery from shaking, so that the laser can directly contact the bottom of the battery, avoid the laser penetrating the support and causing energy weakening, and improve the detection quality and accuracy. This method can avoid signal attenuation and impurity interference when the laser penetrates the object, ensure the purity of laser energy transmission and detection, prevent the table from contacting and damaging the weld, reduce signal distortion, enhance signal strength, and enable the vibrometer to receive and analyze signals more accurately; The metal-ceramic composite partition in the auxiliary component can improve the detection environment. During detection, the electric push rod pulls the synchronization ring to move the partition up to cover the battery. The partition can effectively block magnetic field interference to ensure the normal operation of the equipment. The partition has good thermal conductivity. A temperature sensor can be installed on the top of the shelf to sense the temperature. If the temperature is lower than the set range, the temperature can be automatically controlled to ensure that the detection is carried out at an appropriate temperature and improve the detection accuracy. The baffle plate and sealing plate of the positioning component work together with the partition of the auxiliary component to form a relatively closed small space, which can isolate dust, impurities and electromagnetic interference as much as possible, prevent energy leakage, provide a stable and pure environment for detection, and further improve detection accuracy. The positioning component stably limits the battery, and the auxiliary component adjusts the temperature around the battery through the partition. The cooperation between the two makes the temperature regulation more uniform and effective, thereby improving the detection quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front cross-sectional structural schematic diagram of the present invention; Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 4 It is a schematic diagram of the cross-sectional structure of the storage rack of the present invention; Figure 5 It is a schematic diagram of the top structure of the storage rack of the present invention; Figure 6 It is a schematic diagram of the bottom structure of the storage rack of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the auxiliary component part of the present invention; Figure 8 It is a schematic diagram of the front cross-sectional structure of the movable frame of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the sealing plate part of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the mounting bracket for mounting the vibrometer and the laser head of the present invention; Fig.11 It is a schematic diagram of the structure of the debugging optical path of the present invention; Fig.12 It is a schematic diagram of the principle of the present invention.

[0019] Description of the numbers in the figure: 1. Workbench; 2. Industrial computer; 3. Processor; 4. Backplane; 5. Mounting frame; 6. Servo motor; 7. Screw; 8. Electric guide rail 1; 9. First movable module; 901. First carrier; 902. Vibrometer; 903. Galvanometer galvanometer; 904. First condenser; 10. Second movable module; 1001. Second carrier; 1002. Laser head; 1003. Half-wave polarizer; 1004. Second condenser; 11. Electric guide rail 2; 12. Storage rack; 13. Through slot; 14. Electric guide rail 3; 15. Movable frame; 16. Positioning assembly; 1601. Hollow box; 1602. Mounting box; 1603. Air pump; 1604. 04. Piston seat one; 1605. Support plate; 1606. Piston seat two; 1607. Limiting structure; 1608. Expansion groove; 1609. Sealing plate; 1610. Micro motor; 17. Auxiliary components; 1701. Synchronous ring; 1702. Electric push rod; 1703. Metal ceramic composite partition; 1704. Electric heating plate; 1705. Cavity; 1706. Semiconductor refrigeration plate; 18. Micro push rod; 19. Infrared ray head; 20. Industrial camera; 21. Protective cover; 22. Air filter plate; 23. First filter; 24. Second filter; 25. Sealing column; 26. Sleeve; 27. Limiting rod; 28. Pressure sensor. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention; See also Figure 1-12 In the present invention, a weld detection device for solid-state batteries includes a workbench 1 and an external industrial computer 2. The workbench 1 is integrated with a processor 3 connected to the industrial computer 2. A back plate 4 is fixedly installed on the top of the workbench 1. A mounting frame 5 is slidably connected to the back plate 4. A servo motor 6 is fixedly installed on the front of the back plate 4. A screw rod 7 is fixedly connected to the output shaft of the servo motor 6. The mounting frame 5 is threadedly connected to the screw rod 7. An electric guide rail 8 is fixedly installed on the right side of the mounting frame 5. A first movable module 9 and a second movable module 10 are slidably installed on the electric guide rail 8. The top of the workbench 1 is fixed An electric guide rail 11 is installed, and a rack 12 is slidably installed on the electric guide rail 11. The first movable module 9 and the second movable module 10 are respectively located at the top and bottom of the rack 12. The first movable module 9 and the second movable module 10 are both connected to the processor 3. A through slot 13 is opened on the top of the rack 12, and two electric guide rails 3 14 are fixedly installed on the bottom of the rack 12. A movable frame 15 is arranged inside the through slot 13. The movable frame 15 is slidably installed on the electric guide rail 3 14. A positioning component 16 is arranged on the movable frame 15, and an auxiliary component 17 is arranged on the rack 12.

[0021] The first movable module 9 includes a first carrier 901, the first carrier 901 is slidably mounted on the electric guide rail 8, and a vibrometer 902, a galvanometer galvanometer mirror 903 and a first condenser mirror 904 are arranged on the first carrier 901. The vibrometer 902 and the galvanometer galvanometer mirror 903 are mounted on the top of the first carrier 901, the galvanometer galvanometer mirror 903 is located on the right side of the vibrometer 902, and the first condenser mirror 904 is mounted on the bottom of the first carrier 901 and is located directly below the galvanometer galvanometer mirror 903; The second movable module 10 includes a second carrier frame 1001, which is slidably mounted on an electric guide rail 8. A laser head 1002, a half-wave polarizer 1003 and a second condenser 1004 are provided on the second carrier frame 1001. The laser head 1002 and the half-wave polarizer 1003 are mounted on the top of the second carrier frame 1001, the half-wave polarizer 1003 is located on the right side of the laser head 1002, and the second condenser 1004 is mounted on the second carrier frame 1001 and is directly above the half-wave polarizer 1003.

[0022] The positioning assembly 16 includes two hollow boxes 1601 and two installation boxes 1602. The two hollow boxes 1601 are respectively installed on the left and right sides of the movable frame 15. The installation box 1602 is installed on the top of the hollow box 1601. The outer sides of the hollow box 1601 and the installation box 1602 are both installed with air pumps 1603 connected to the inside thereof. Piston seats 1604 arranged at equal distances are slidably installed on the inner wall of the hollow box 1601. A support plate 1605 is fixedly connected to the piston seat 1604. The other end of the support plate 1605 penetrates and extends to the outside of the hollow box 1601. The inner wall of the installation box 1602 is slidably connected with an equidistantly arranged piston seat 1604. The piston seat 1606 is evenly distributed, and a limiting structure 1607 is connected to the piston seat 1606. The limiting structure 1607 passes through and extends to the outside of the installation box 1602. Two expansion grooves 1608 are provided on the inner wall of the movable frame 15. A sealing plate 1609 is slidably connected to the inner wall of the expansion groove 1608. A micro motor 1610 is fixedly installed on the inner wall of the expansion groove 1608. The output shaft of the micro motor 1610 is meshed with the teeth on the sealing plate 1609 through a gear. The sealing plate 1609 is located on the top of the support plate 1605, and the top of the sealing plate 1609 and the top of the support plate 1605 are coated with a thermal insulation coating.

[0023] A micro push rod 18 is fixedly installed at the bottom of the second carrier frame 1001, and an infrared head 19 is fixedly installed at the top of the micro push rod 18. The infrared head 19 is located on the right side of the laser head 1002. An industrial camera 20 is installed at the bottom of the movable frame 15, and the industrial camera 20 is connected to the industrial computer 2.

[0024] The auxiliary component 17 includes a synchronization ring 1701, which is slidably connected to the bottom of the rack 12. An electric push rod 1702 is fixedly installed at the bottom of the rack 12. The output end of the electric push rod 1702 is connected to the top of the synchronization ring 1701. The top of the synchronization ring 1701 is fixedly connected to uniformly distributed metal-ceramic composite partitions 1703. The top of the metal-ceramic composite partition 1703 penetrates and extends to the top of the rack 12. Electric heating plates 1704 are embedded in the metal-ceramic composite partitions 1703 on the front and back sides. Cavities 1705 are opened in the metal-ceramic composite partitions 1703 on the left and right sides. Semiconductor cooling plates 1706 are fixedly installed on the inner wall of the cavity 1705. The heat dissipation surface of the semiconductor cooling plate 1706 penetrates and extends to the outside of the metal-ceramic composite partition 1703. A temperature sensor connected to the processor 3 is installed on the top of the rack 12.

[0025] A first filter 23 and a second filter 24 are respectively installed on the top of the first carrier frame 901 and the second carrier frame 1001 . The first filter 23 and the second filter 24 are respectively located on the right side of the vibrometer 902 and the laser head 1002 .

[0026] The limiting structure 1607 includes a sleeve 26, which is slidably connected to the inside of the installation box 1602. A limiting rod 27 is movably installed inside the sleeve 26. A pressure sensor 28 is fixedly installed on the inner wall of the sleeve 26, and the pressure sensor 28 is connected to the processor 3.

[0027] This solid-state battery weld inspection device is used to inspect the welds of square aluminum shell batteries. The welding of square aluminum shell batteries is divided into sealing welding and sealing nail welding. The device needs to be debugged before use. The laser head 1002 is connected to a laser. The laser head 1002 is connected to the vibrometer 902 through a mounting bracket. The mounting bracket can realize simple small-range movement for debugging. The device is connected to an industrial computer 2. The above mounting bracket is as follows Fig.10 As shown, the mounting bracket can realize the fine adjustment of the laser head 1002 and the vibrometer 902 installed on the top of the bracket in the front, back, left, right and vertical directions through the existing mature linear guide rails, push rods and screws, and the driving method disclosed above can be replaced by any drive that can complete the operation, which should be included in the scope of protection of this application.

[0028] like Fig.11As shown, before debugging the equipment, the emission direction of the optical path is first drawn, and the rough installation of each component is performed. Then, a red light indicator is set on the laser head 1002, a red light coaxial bracket and a 45-degree full-reflector for dimming are set on the optical path, and a full-reflector for dimming is placed on the rack 12, so as to verify and calibrate the laser optical path. At the same time, a guide groove for the movement of the red light coaxial bracket is processed on the straight side of the optical path of the vibrometer 902 and the laser head 1002 to emit red light. By adjusting the position of the red light emitting end, it can be accurately positioned at the near end and the far end. Hitting the center of the red light coaxial bracket can ensure the linearity and accuracy of the laser light path. Placing a dimming full reflector on the rack 12 and observing whether the red light can be reflected back to the center of the emitting side can be used to detect and verify the performance of the optical system. If the red light can be accurately reflected back to the center of the emitting side, it indicates that the reflectors and other components in the optical system have been correctly installed and the light path is correct. After the light path is correct, remove the 45-degree full reflector for dimming and install the galvanometer galvanometer 903 and the mottled polarizer at this position, that is, Figure 2 The battery test can be performed. In the above process, the positions of the laser head 1002 and the vibrometer 902 can be fine-tuned by installing the bracket.

[0029] When it is necessary to inspect the weld of the square aluminum shell battery, the user first places the square aluminum shell battery on the movable frame 15 of the storage rack 12, and the movable frame 15 is driven by the electric guide rail three 14 to realize left and right lateral movement. In the initial state, the hollow box 1601 at the bottom of the positioning component 16 is filled with gas, and the air pump 1603 on the hollow box 1601 increases the internal air pressure of the hollow box 1601 so that the piston seat one 1604 pushes the support plate 1605 to be inside the movable frame 15, while the inside of the installation box 1602 at the top is in a negative pressure state, that is, the limiting structure 1607 is pulled to the inside of the installation box 1602 by the piston seat two 1606.

[0030] The square aluminum shell battery is placed inside the movable frame 15 and supported by multiple groups of support plates 1605. The surface of the support plates 1605 is coated with a smooth heat-insulating coating. Then the processor 3 controls the air pump 1603 on the installation box 1602 to start operating. The air pump 1603 starts to fill the installation box 1602 with gas to increase the internal air pressure, thereby pushing the piston seat 1606 to make the limiting structure 1607 move outward. As the air pump 1603 gradually operates, the end of the limiting rod 27 in the limiting structure 1607 contacts the square aluminum shell battery. At this time, the pressure sensor 28 begins to be stressed and transmits the signal to the processor 3. When the value reaches the set value, the air pump 1603 can be stopped. The set value at this time ensures that the limiting rod 27 is opposite to the square While effectively limiting the aluminum shell battery, it also prevents excessive pressure from causing damage to the square aluminum shell battery. Then, the air pump 1603 on the hollow box 1601 begins to discharge the internal gas of the hollow box 1601 to gradually form a negative pressure state inside it, and the support plate 1605 and the piston seat 1604 are pulled back. When the support plates 1605 on both sides are on both sides of the square aluminum shell battery, that is, the bottom of the square aluminum shell battery is not blocked, the movement can be stopped, so that the bottom of the square aluminum shell battery is completely exposed. At the same time, the shielding plate blocks most of the internal space of the movable frame 15. The movement distance of the above-mentioned shielding plate can be set according to the square aluminum shell battery specifications input in advance to control the opening and closing of the air pump 1603. At the same time, it can also be determined by the acquisition of the industrial camera 20 whether it has reached the appropriate position.

[0031] After completion, the processor 3 will control the operation of the micro motor 1610. After the micro motor 1610 is powered on, it drives the gear fixed to it to rotate, and cooperates with the teeth on the top of the sealing plate 1609 to make the sealing plate 1609 extend from the inside of the expansion groove 1608 until the opposite sides of the two sealing plates 1609 touch the front and back sides of the square aluminum shell battery, that is, the micro motor 1610 stops operating. Since the sealing plate 1609 is at the top of the shielding plate, a closed space is formed, and only the bottom of the square aluminum shell battery is exposed.

[0032] Subsequently, the processor 3 controls the operation of the auxiliary component 17, and the electric push rod 1702 pulls the synchronization ring 1701 to move upward, and the multiple groups of metal-ceramic composite partitions 1703 on the top of the synchronization ring 1701 begin to move upward and until the surrounding of the square aluminum shell battery is shielded. The metal-ceramic composite partition 1703 has a good effect of preventing magnetic field interference and has good thermal conductivity. An adaptive temperature sensor can be installed on the top of the storage rack 12 to sense whether the temperature of the square aluminum shell battery weld detection area is in a suitable range. The processor 3 can start the operation of components in different partitions according to the situation. For example, if it is lower than the set range, the electric heating plate 1704 is controlled to be energized to increase the surface temperature of the partition and Heat is exchanged with the gas nearby in the space so that the temperature near the square aluminum shell battery rises to the set range. If the temperature is high, the semiconductor refrigeration plate 1706 is controlled to operate, and the airflow or liquid is cooled to reduce the temperature of the partition. Similarly, the temperature near the square aluminum shell battery drops to the inside of the set range. In the above process, the positioning component 16 not only stabilizes the square aluminum shell battery but also shields the space nearby, so that the positioning component 16 and the top auxiliary component 17 form a small space, which can isolate some dust, impurities and electromagnetic interference, and at the same time prevent energy leakage to improve the accuracy of weld detection, so that the temperature control effect is better and the battery weld detection environment is controlled within a suitable temperature range.

[0033] Then the micro push rod 18 drives the infrared head 19 fixedly mounted thereon to move upward to a coaxial height with the emitting end of the laser head 1002. Subsequently, the infrared head 19 generates infrared rays which are reflected by the half-wave polarizer 1003 to the bottom of the square aluminum shell battery. The industrial camera 20 can collect the position graph and display it on the industrial computer 2 or other equipment to determine whether the position of the square aluminum shell battery is correct. If there is a deviation, the position of the movable frame 15 can be adjusted by the electric guide rail 2 11 and the electric guide rail 3 14. If there is a deviation after the laser is emitted subsequently, the position of the square aluminum shell battery can also be fine-tuned by the graph fed back by the industrial camera 20.

[0034] If the sealing nail welding seam detection is to be carried out, the user first uses the servo motor 6 to drive the screw 7 to drive the mounting frame 5 to move, so that the first movable module 9 and the second movable module 10 reach the appropriate initial detection position, and the horizontal position of the first movable module 9 and the second movable module 10 is fine-tuned by the electric guide rail 8, so that the detection equipment is roughly aligned with the sealing nail welding seam of the battery, and then the laser external to the laser head 1002 is started. The laser is emitted from the laser head 1002, passes through the half-wave polarizer 1003 and the second condenser 1004 in turn, and then shoots vertically upward to the sealing nail welding seam of the square aluminum shell battery. This detection method is laser ultrasonic non-contact weld detection. In this process, the fine-tuning function of the electric guide rail 8 is used. , adjust the position of the laser head 1002 to ensure that the laser accurately penetrates the weld. After the laser penetrates the weld, an ultrasonic vibration signal will be generated at the weld. The vibration signal propagates from the bottom to the top. The vibrometer 902 at the top receives the vibration signal through the galvanometer galvanometer 903 and the first condenser 904. Then the vibrometer 902 converts the received vibration signal into an electrical signal and transmits it to the processor 3. After receiving the electrical signal, the processor 3 processes and analyzes the signal according to the preset algorithm and standard to determine whether the sealing nail welding weld has defects such as incomplete welds, pores or cracks. Finally, the processor 3 transmits the detection results to the external industrial computer 2, and the industrial computer 2 can store, display or further analyze the results.

[0035] If the sealing welding seam is to be inspected, the user first drives the storage rack 12 and the movable frame 15 thereon to move by the electric guide rail 2 11 and the electric guide rail 3 14, so that the sealing welding seam of the square aluminum shell battery is moved to a suitable initial inspection position, and at the same time uses the servo motor 6 to drive the screw rod 7 to adjust the position of the mounting frame 5, so that the first movable module 9 and the second movable module 10 are in a rough position capable of detecting the sealing welding seam, and then starts the laser external to the laser head 1002. The laser is emitted from the laser head 1002, passes through the half-wave polarizer 1003 and the second condenser 1004 in sequence, and then shoots vertically upward toward the sealing welding seam. Since a laser ultrasonic non-contact weld detection method is adopted, if the laser light path is not accurately aligned, it can also be calibrated using the relevant adjustment function. When the laser penetrates the weld, an ultrasonic vibration signal is generated. The vibration signal is received by the vibrometer 902 and converted into an electrical signal and transmitted to the processor 3. The processor 3 processes and analyzes to determine whether there is a defect in the weld, and transmits the result to the industrial computer 2.

[0036] After completing the automatic weld detection, the auxiliary component 17 and the positioning component 16 are controlled to reset, and the multiple groups of metal-ceramic composite partitions 1703 move downward to expose the square aluminum shell battery. The support plate 1605 extends to support the square aluminum shell battery, and the limiting structure 1607 in the installation box 1602 is retracted, and the user can take out the square aluminum shell battery.

[0037] In the present invention, the equipment adopts laser ultrasonic non-contact weld detection technology, and the ultrasonic vibration signal generated can be accurately received and analyzed. This technology avoids the errors that may be caused by traditional contact detection, and can accurately detect whether the weld has defects such as incompleteness, pores or cracks, avoiding the errors of traditional contact detection, and can accurately detect various defects of the weld. At the same time, the optical path adjustment ensures the linearity and accuracy of the optical path by drawing the optical path, setting the red light indicator and related reflectors.

[0038] The industrial camera 20 in the equipment plays an important role in the detection process. It can determine whether the battery position is correct before conducting weld detection. During the detection process, if the laser light path is deviated or the battery position is deviated, the graphics fed back by the industrial camera 20 can be used for fine-tuning to ensure the accuracy of the detection. In conjunction with the positioning component 16, the positioning and limiting of square aluminum shell batteries of different specifications are achieved, thereby improving the practicality of the equipment.

[0039] In the present invention, the positioning component 16 has good adaptability to square aluminum shell batteries of different sizes during the rough installation stage. When placing the battery, the movable frame 15 can move laterally. The hollow box 1601 and the installation box 1602 control the air pressure through the air pump 1603, so that the support plate 1605 and the limiting structure 1607 can move in coordination. The pressure sensor 28 of the limiting structure 1607 can stop the operation of the air pump 1603 when the set value is reached according to the actual situation of the battery, which can effectively limit the battery and avoid damage, and can adapt to batteries of various specifications.

[0040] The surfaces of the supporting batteries of the multiple groups of supporting plates 1605 are coated with a smooth heat-insulating coating, and during the positioning process, the shielding plate can set the movement distance according to the battery specifications, shielding most of the internal space of the movable frame 15, leaving only the bottom of the battery exposed, and cooperating with the sealing plate 1609 to form a relatively closed space to prevent the battery from shaking during the detection process, so that the bottom laser can directly contact and react with the bottom of the square aluminum shell battery, so that the laser does not need to penetrate the object supporting the square aluminum shell battery to cause energy weakening, thereby improving the detection quality and accuracy.

[0041] In terms of detection quality, this method avoids signal attenuation and impurity interference when the laser penetrates an object, ensuring the effective transmission of laser energy and the purity of the detection process. At the same time, it prevents damage to the weld due to table contact and ensures the integrity of the weld. In terms of detection accuracy, it reduces signal distortion and enhances signal strength, allowing the Vibrometer 902 to receive and analyze signals more accurately, thereby effectively improving the quality and accuracy of weld detection.

[0042] In the present invention, the metal-ceramic composite partition 1703 in the auxiliary component 17 greatly improves the detection environment. During the detection process, the electric push rod 1702 pulls the synchronization ring 1701 to move the metal-ceramic composite partition 1703 upward to shield the surrounding of the square aluminum shell battery. These partitions have a good effect in preventing magnetic field interference. For example, if there is magnetic field interference in the surrounding during the detection process, the partition can effectively block it to ensure the normal operation of the detection equipment.

[0043] The metal-ceramic composite partition 1703 also has good thermal conductivity. A temperature sensor can be installed on the top of the shelf 12 to sense the temperature of the weld detection area. If the temperature is lower than the set range, automatic temperature control can be achieved, so that the temperature near the battery drops to within the set range, ensuring that the detection is carried out in a suitable temperature environment, thereby improving the accuracy of weld detection.

[0044] The shielding plate and sealing plate 1609 of the positioning component 16 and the metal-ceramic composite partition 1703 of the auxiliary component 17 work together to form a relatively closed small space. This space can isolate dust, impurities and electromagnetic interference, prevent energy leakage, provide a stable and pure environment for weld detection, and further improve detection accuracy. At the same time, the positioning component 16 stabilizes the battery at a specific position, and the auxiliary component 17 adjusts the temperature around the battery through the partition. The cooperation of the two makes the temperature regulation more uniform and effective, ensuring that the battery is at a suitable temperature during the detection process, and improving the detection quality.

[0045] See also Figure 1 and 2 , wherein: a protective cover 21 is movably installed on the top of the first carrier 901 and the second carrier 1001, and an air filter plate 22 is installed on the top of the protective cover 21.

[0046] In the present invention, the provision of the protective cover 21 can protect the precision components on the top of the first carrier 901 and the second carrier 1001 from being damaged, and the air filter plate 22 on the top of the protective cover 21 can realize air circulation.

[0047] See also Figure 1 , 2 , 4 and 5, wherein: the top of the storage rack 12 is fixedly connected with evenly distributed sealing columns 25, and the metal-ceramic composite partition 1703 and the sealing columns 25 are subjected to sliding sealing treatment.

[0048] In the present invention, the plurality of sealing columns 25 can fit with the metal-ceramic composite partition 1703 when it moves upward, thereby forming a more sealed and tight enclosure, achieving a better temperature control and protection effect.

[0049] See also Fig.12 , wherein: the laser head 1002 is externally connected to an energy meter and a display panel through a wiring harness.

[0050] In the present invention, when the laser head 1002 forms laser emission, the energy meter can cooperate with the display panel to display the energy value. The user can understand whether the laser energy is compatible with the value to be detected based on the value and can make adjustments in time.

[0051] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A weld inspection device for solid-state batteries, comprising a workbench (1) and an external industrial computer (2), characterized in that: The workbench (1) is integrated with a processor (3) connected to an industrial computer (2); a back plate (4) is fixedly mounted on the top of the workbench (1); a mounting frame (5) is slidably connected to the back plate (4); a servo motor (6) is fixedly mounted on the front of the back plate (4); a lead screw (7) is fixedly connected to the output shaft of the servo motor (6); the mounting frame (5) is threadedly connected to the lead screw (7); an electric guide rail (8) is fixedly mounted on the right side of the mounting frame (5); a first movable module (9) and a second movable module (10) are slidably mounted on the electric guide rail (8); an electric guide rail (11) is fixedly mounted on the top of the workbench (1); the electric guide rail (11) is fixedly mounted on the front of the workbench (1); a lead screw (7) is fixedly connected to the output shaft of the servo motor (6); the mounting frame (5) is threadedly connected to the lead screw (7); an electric guide rail (8) is fixedly mounted on the right side of the mounting frame (5); a first movable module (9) and a second movable module (10) are slidably mounted on the electric guide rail (8); an electric guide rail (11) is fixedly mounted on the top of the workbench (1); 11) is slidably mounted on a storage rack (12), the first movable module (9) and the second movable module (10) are respectively located at the top and the bottom of the storage rack (12), the first movable module (9) and the second movable module (10) are both connected to the processor (3), a through slot (13) is provided on the top of the storage rack (12), two electric guide rails (14) are fixedly mounted on the bottom of the storage rack (12), a movable frame (15) is provided inside the through slot (13), the movable frame (15) is slidably mounted on the electric guide rail (14), a positioning component (16) is provided on the movable frame (15), and an auxiliary component (17) is provided on the storage rack (12); The first movable module (9) comprises a first carrier frame (901), the first carrier frame (901) is slidably mounted on an electric guide rail (8), a vibrometer (902), a galvanometer-type galvanometer mirror (903) and a first condenser mirror (904) are arranged on the first carrier frame (901), the vibrometer (902) and the galvanometer-type galvanometer mirror (903) are mounted on the top of the first carrier frame (901), the galvanometer-type galvanometer mirror (903) is located on the right side of the vibrometer (902), and the first condenser mirror (904) is mounted on the bottom of the first carrier frame (901) and is located directly below the galvanometer-type galvanometer mirror (903); The second movable module (10) comprises a second carrier frame (1001), the second carrier frame (1001) is slidably mounted on an electric guide rail (8), a laser head (1002), a half-wave polarizer (1003) and a second condenser (1004) are arranged on the second carrier frame (1001), the laser head (1002) and the half-wave polarizer (1003) are mounted on the top of the second carrier frame (1001), the half-wave polarizer (1003) is located on the right side of the laser head (1002), and the second condenser (1004) is mounted on the second carrier frame (1001) and is located directly above the half-wave polarizer (1003); The positioning assembly (16) comprises two hollow boxes (1601) and two installation boxes (1602), the two hollow boxes (1601) being installed on the left and right sides of the movable frame (15) respectively, the installation box (1602) being installed on the top of the hollow box (1601), the outer sides of the hollow box (1601) and the installation box (1602) being installed with air pumps (1603) connected to the inside thereof, the inner wall of the hollow box (1601) being slidably installed with piston seats (1604) arranged at equal distances, the piston seats (1604) being fixedly connected with a support plate (1605), the other end of the support plate (1605) penetrating through and extending to the outside of the hollow box (1601), the inner wall of the installation box (1602) being slidably connected with piston seats (1604) arranged at equal distances, A piston seat (1606) is evenly distributed, and a limiting structure (1607) is connected to the piston seat (1606). The limiting structure (1607) passes through and extends to the outside of the installation box (1602). Two expansion grooves (1608) are provided on the inner wall of the movable frame (15). A sealing plate (1609) is slidably connected to the inner wall of the expansion groove (1608). A micro motor (1610) is fixedly installed on the inner wall of the expansion groove (1608). The output shaft of the micro motor (1610 is meshed with teeth on the sealing plate (1609) through a gear. The sealing plate (1609) is located on the top of the support plate (1605), and the top of the sealing plate (1609) and the top of the support plate (1605) are both coated with a heat insulation coating.

2. A weld detection device for solid-state batteries according to claim 1, characterized in that: A micro push rod (18) is fixedly mounted on the bottom of the second support frame (1001), an infrared ray head (19) is fixedly mounted on the top of the micro push rod (18), and the infrared ray head (19) is located on the right side of the laser head (1002). An industrial camera (20) is mounted on the bottom of the movable frame (15), and the industrial camera (20) is connected to the industrial computer (2).

3. A weld detection device for solid-state batteries according to claim 1, characterized in that: A protective cover (21) is movably mounted on the top of each of the first supporting frame (901) and the second supporting frame (1001), and an air filter plate (22) is mounted on the top of each of the protective covers (21).

4. A weld detection device for solid-state batteries according to claim 1, characterized in that: The auxiliary component (17) includes a synchronization ring (1701), the synchronization ring (1701) is slidably connected to the bottom of the storage rack (12), an electric push rod (1702) is fixedly installed on the bottom of the storage rack (12), the output end of the electric push rod (1702) is connected to the top of the synchronization ring (1701), and the top of the synchronization ring (1701) is fixedly connected to a uniformly distributed metal-ceramic composite partition (1703), and the top of the metal-ceramic composite partition (1703) The metal ceramic composite partition (1703) on the front and back sides has an electric heating plate (1704) embedded therein, and the metal ceramic composite partition (1703) on the left and right sides has a cavity (1705) formed therein, and a semiconductor cooling plate (1706) is fixedly mounted on the inner wall of the cavity (1705), and the heat dissipation surface of the semiconductor cooling plate (1706) penetrates and extends to the outside of the metal ceramic composite partition (1703).

5. The weld detection device for solid-state batteries according to claim 1, characterized in that: A first filter (23) and a second filter (24) are respectively mounted on the top of the first carrier frame (901) and the second carrier frame (1001); the first filter (23) and the second filter (24) are respectively located on the right side of the vibrometer (902) and the laser head (1002).

6. A weld detection device for solid-state batteries according to claim 4, characterized in that: The top of the storage rack (12) is fixedly connected with evenly distributed sealing columns (25), and the metal-ceramic composite partition (1703) and the sealing columns (25) are subjected to sliding sealing treatment.

7. A weld detection device for solid-state batteries according to claim 1, characterized in that: The limiting structure (1607) comprises a sleeve (26), the sleeve (26) being slidably connected to the interior of the installation box (1602), a limiting rod (27) being movably installed inside the sleeve (26), a pressure sensor (28) being fixedly installed on the inner wall of the sleeve (26), and the pressure sensor (28) being connected to the processor (3).

8. A weld detection device for solid-state batteries according to claim 1, characterized in that: The laser head (1002) is externally connected to an energy meter and a display panel via a wiring harness.

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