A helium detection system for square shell batteries

Abstract

The present invention provides a square-shell battery helium inspection system, comprising a workbench with a cavity; a material conveying line, arranged on one side of the workbench, for conveying workpieces to be inspected; a loading mechanism, arranged on the workbench and above the material conveying line, for transferring workpieces to the helium inspection mechanism; a helium inspection mechanism, arranged on the workbench and located at one end of the loading mechanism, for inspecting the sealing of batteries after full welding, with multiple groups arranged in parallel; and a transfer mechanism, arranged at the end of the helium inspection mechanism away from the loading mechanism and above one end of the helium inspection mechanism. The square-shell battery helium inspection system provided by the present invention integrates a helium recovery mechanism and a laser marking mechanism into a single unit, making it more compact in structure and facilitating the transfer of batteries after helium inspection to the marking machine. The application of a multi-axis module transforms unidirectional movement into multi-directional linkage, saving transportation time to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of battery detection, and in particular to a helium detection system for square-shell batteries. Background Art

[0002] Currently, all helium inspection stations on the market utilize two parallel modules for loading and unloading. The inspection mechanism is placed perpendicularly between the modules. The helium inspection equipment is generally narrow in the direction of the incoming material flow and longer perpendicular to the flow, forming a rectangular shape. This results in long module transport distances, and the helium inspection and laser marking are independent and separate devices. For workpiece flow, a linear transition is required between the two, and each device requires a set of loading and unloading robots. Summary of the Invention

[0003] The object of the present invention is to provide a helium detection system for square-shell batteries to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned object, the present invention provides a helium inspection system for square-shell batteries, comprising: a workbench having a cavity;

[0005] The material conveying line is set on one side of the workbench and is used to convey the workpiece to be inspected;

[0006] The code scanning mechanism is arranged on the side of the material conveying line;

[0007] A loading mechanism, disposed on the workbench and located above the material conveying line, for transferring the workpiece to the helium inspection mechanism;

[0008] Multiple sets of helium detection mechanisms are set on the workbench and located at one end of the loading mechanism. They are used to detect the sealing of the battery after full welding. Multiple sets are set in parallel.

[0009] The transfer mechanism is provided at one end of the helium inspection mechanism away from the feeding mechanism and is located above one end of the helium inspection mechanism, and is used to transfer the workpiece after helium inspection to the line body of the marking mechanism;

[0010] The marking mechanism is located on one side of the feeding mechanism and is parallel to the helium detection mechanism. It is used to engrave codes on the battery cover and record information.

[0011] The recovery mechanism is arranged on a side of the transfer mechanism away from the helium detection mechanism, and is used for supplying and recovering the helium inside the helium detection mechanism;

[0012] The unloading mechanism is arranged at one end of the loading mechanism and is located above the material conveying line.

[0013] Preferably, the system further comprises:

[0014] The clamping components are respectively arranged on the feeding mechanism, the transfer mechanism and the unloading mechanism;

[0015] The NG pull tape is arranged on the workbench and is parallel to the marking mechanism, and is used to buffer defective batteries.

[0016] Preferably, the feeding mechanism comprises:

[0017] Two sets of first transmission modules in the X direction are arranged on the workbench;

[0018] A set of second transmission modules in the Y direction is arranged between the two sets of first transmission modules in the X direction;

[0019] A third transmission module in the Z direction is arranged on the second transmission module;

[0020] The loading mechanism is used to drive the clamping assembly to move in three dimensions and transport the battery to a specific position where the helium inspection mechanism is loaded.

[0021] Preferably, the helium detection mechanism comprises:

[0022] A drive module is provided on the workbench and located at one end of the feeding mechanism;

[0023] A positioning detection module is provided on the driving module;

[0024] The vacuum box assembly detection module is set on the workbench and located above the drive module;

[0025] The positioning detection module includes:

[0026] A fixed component is provided on the driving module;

[0027] A placement component is provided on the fixing component, wherein a plurality of cavities for placing battery cells are provided inside the placement component;

[0028] A first lifting cylinder is provided between the fixing assembly and the placing assembly, and is used to lift the placing assembly to a state where it is sealed with the components at the vacuum box closing detection module;

[0029] Opposing photoelectric switches are set at the four corners of the fixed component. Each corner is provided with two sets of opposing photoelectric switches at different heights to detect whether the battery is tilted when placed;

[0030] The driving module is provided with three stop positions, namely the loading area, the detection area, and the unloading area. The loading area, the helium detection area, and the unloading area are arranged in series. The vacuum box closing detection module is located in the detection area of ​​the driving module;

[0031] The vacuum box closing detection module includes:

[0032] A placement rack is provided on the workbench and is located above the drive module;

[0033] The hollow shaft cylinder is arranged on the top of the placement frame and is spaced apart along the displacement direction of the driving module and is connected to the recovery mechanism;

[0034] A helium injection sealing nozzle is provided at the bottom of the hollow shaft and is used for vacuuming and helium injection inside the battery;

[0035] The vacuum pumping component is arranged on the placement rack and is located on one side of the hollow shaft cylinder, and is used for vacuuming the interior of the placement component.

[0036] Preferably, the helium detection mechanism further includes:

[0037] A helium injection nozzle cleaning mechanism is provided on the top of the fixed assembly and at an end away from the feeding mechanism, and is used to clean the helium injection sealing nozzle;

[0038] The helium injection nozzle cleaning mechanism comprises:

[0039] A fixing frame is provided on the top of the fixing assembly and is located at an end away from the feeding mechanism;

[0040] A fixing plate is arranged on the fixing frame;

[0041] A second lifting cylinder is provided between the fixing frame and the fixing plate, and is used to lift the fixing plate;

[0042] Install the assembly and rotate it on the fixed plate.

[0043] A driving assembly is disposed on the fixing plate and is rotatably connected to the mounting assembly, and is used to drive the mounting assembly to rotate in a circular motion;

[0044] The brush assembly is arranged on the inner wall of the mounting assembly and is used to clean the helium injection sealing nozzle.

[0045] Preferably, the transfer mechanism includes:

[0046] A seventh transmission module in the Y direction is arranged on the workbench and located above one end of the unloading position of the drive module;

[0047] A set of eighth transmission modules in the Z direction, arranged on the seventh transmission module;

[0048] The transfer mechanism is used to drive the clamping assembly to move in three dimensions to achieve battery transfer.

[0049] The marking mechanism comprises:

[0050] A conveying module is arranged on the workbench and parallel to the helium detection mechanism;

[0051] A laser marking assembly is disposed on the workbench and located on top of the conveying module;

[0052] Mirror reflective photoelectric switches are provided at the head and tail ends of the conveying module to provide feedback on the loading and unloading positions of the batteries in the conveying module;

[0053] A barcode scanner is provided on the conveying module and is located on one side of the laser marking component;

[0054] The positioning module is set on the workbench and located on both sides of the conveying module, and is used to clamp the battery when it reaches the bottom of the laser marking component;

[0055] The positioning module includes:

[0056] A base is provided below the conveying module, with both ends of the base extending out of the bottom of the conveying module;

[0057] Clamping components are arranged at both ends of the base and located on both sides of the conveying module;

[0058] Two sets of driving cylinders are respectively arranged on the side walls of both sides of the base. The piston rods of the two sets of driving cylinders are respectively connected to the clamping assemblies at both ends of the base, and are used to drive the clamping assemblies to limit the freedom of the battery in the direction perpendicular to the streamline.

[0059] The clamping cylinders are respectively arranged on the top of the clamping components and are used to drive the clamps on the clamping components to limit the freedom of the battery in the streamline direction.

[0060] Preferably, the laser marking assembly comprises:

[0061] A lifting module is provided on the workbench and located on one side of the conveying module, and is used to adjust the height of the laser generator;

[0062] The laser generator is installed on the lifting module and located above the NG pull belt.

[0063] Preferably, the recycling mechanism comprises:

[0064] An air compressor is arranged in a cavity on one side of the workbench;

[0065] The high-pressure tank is installed on one side of the air compressor and is used to store a certain concentration of helium. It can provide helium to the inside of the battery and is connected to the hollow shaft cylinder through a pipe;

[0066] The low-pressure tank is located below the air compressor and is used to initially store the helium recovered from the battery;

[0067] The helium tank is installed on the side of the air compressor and is used to inject helium into the low-pressure tank to adjust the concentration of the recovered helium;

[0068] The nitrogen tank is installed on one side of the air compressor and is connected to the vacuum assembly to remove the residual helium in the cavity where the assembly is placed.

[0069] Preferably, the blanking mechanism comprises:

[0070] A fourth transmission module in the Y direction is arranged on the workbench;

[0071] A fifth transmission module in the X direction, disposed on the fourth transmission module;

[0072] a sixth transmission module in the Z direction, disposed on the fifth transmission module;

[0073] The unloading mechanism is used to drive the clamping assembly to move in three dimensions to transport the batteries to the material conveying line or NG pull belt.

[0074] The helium inspection system for prismatic batteries integrates the helium recovery mechanism and the laser marking mechanism into a single unit, creating a more compact structure and facilitating the transfer of inspected batteries to the marking machine. The use of a multi-axis module transforms single-direction movement into multi-directional linkage, significantly reducing transportation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0076] Figure 2 A top view of the present invention;

[0077] Figure 3 Schematic diagram of the structure of the helium detection mechanism of the present invention;

[0078] Figure 4 This is a schematic structural diagram of the hollow shaft cylinder of the present invention;

[0079] Figure 5 This is a schematic structural diagram of the helium injection nozzle cleaning mechanism of the present invention;

[0080] Figure 6 This is a structural diagram of the connection between the upper brush assembly and the mounting assembly of the present invention;

[0081] Figure 7 It is a structural schematic diagram of the feeding mechanism of the present invention;

[0082] Figure 8 It is a structural schematic diagram of the blanking mechanism of the present invention;

[0083] Figure 9 It is a structural schematic diagram of the marking mechanism of the present invention;

[0084] Figure 10 This is a structural diagram of the positioning module of the present invention;

[0085] Figure 11 It is a structural schematic diagram of the transfer mechanism of the present invention.

[0086] Description of Reference Numerals

[0087] 1. Workbench 2. Helium detection mechanism

[0088] 21. Drive module 211. Loading area

[0089] 212. Inspection area 213. Unloading area

[0090] 22. Placement rack 23. Fixing components

[0091] 24. Placement assembly 25. Helium nozzle cleaning mechanism

[0092] 251, fixed frame 252, second lifting cylinder

[0093] 253, drive assembly 254, fixed plate

[0094] 255. Installation assembly 256. Brush assembly

[0095] 26. First lifting cylinder 27. Cavity

[0096] 28. Photoelectric switch 29. Vacuum pump

[0097] 210, hollow shaft cylinder 3, feeding mechanism

[0098] 31. First transmission module 32. Second transmission module

[0099] 33. Third transmission module 4. Unloading mechanism

[0100] 41. Fourth transmission module 42. Fifth transmission module

[0101] 43. Sixth transmission module 5. NG pull belt

[0102] 6. Marking mechanism 61. Conveying module

[0103] 62. Barcode scanner 63. Laser generator

[0104] 64. Lifting module 65. Mirror reflection photoelectric switch

[0105] 66. Positioning module 661. Base

[0106] 662, clamping assembly 663, driving cylinder

[0107] 7. Transfer mechanism 71. Seventh transmission module

[0108] 72. Eighth Transmission Module 8. Recovery Mechanism

[0109] 81. Air compressor 82. High-pressure tank

[0110] 83. Helium tank 84. Nitrogen tank

[0111] 85. Low-pressure tank 9. Clamping assembly

[0112] 10. Material conveying line 11. Code scanning mechanism DETAILED DESCRIPTION

[0113] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used to describe the relative positional relationships of components in the directions shown in the drawings or in the vertical, perpendicular or gravity directions.

[0114] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0115] like Figures 1 to 2 As shown; an embodiment of the present invention provides a square shell battery helium detection system:

[0116] It includes a workbench 1 with a cavity, a material conveying line 10, a code scanning mechanism 11, a feeding mechanism 3, multiple helium inspection mechanisms 2, a transfer mechanism 7, a marking mechanism 6, a recycling mechanism 8, a feeding mechanism 4, a clamping component 9 and an NG pull belt 5. The material conveying line 10 is arranged on one side of the workbench 1 for conveying the workpiece to be inspected; the code scanning mechanism 11 is arranged on the side of the material conveying line; the feeding mechanism 3 is arranged on the workbench 1 and above the material conveying line 10 for transferring the workpiece to the helium inspection mechanism 2; multiple helium inspection mechanisms 2 are arranged on the workbench 1 and at one end of the feeding mechanism for detecting the sealing of the battery after full welding, and multiple groups are arranged in parallel; the transfer mechanism 7 is arranged at the helium inspection mechanism 2 away from the feeding mechanism 3, and is located above the unloading area 213 at one end of the helium inspection mechanism 2, and is used to transfer the workpiece after helium inspection to the line body of the marking mechanism 6; the marking mechanism 6 is arranged on one side of the feeding mechanism 3, parallel to the helium inspection mechanism 2, and is used to engrave codes on the battery top cover and record information; the recovery mechanism 8 is arranged on the side of the transfer mechanism 7 away from the helium inspection mechanism 2, and is used for the inflation supply and recovery of helium inside the helium inspection mechanism 2; the unloading mechanism 4 is arranged at one end of the feeding mechanism 3 and is located above the material conveying line 10; the clamping components 9 are respectively arranged on the feeding mechanism 3, the transfer mechanism 7 and the unloading mechanism 4; the NG pull belt 5 is arranged on the workbench 1, and is parallel to the marking mechanism 6, and is used to cache defective batteries.

[0117] Specifically, the scanning mechanism 11 installed on the material conveying line 10 uses a scanning gun to detect the welds of the batteries in the previous process to find out defective products. The loading mechanism 3 moves the batteries from the material conveying line 10 to the helium inspection mechanism 2 through the clamping component 9. The batteries are helium inspected online through the helium inspection mechanism 2. When the batteries move to the other end of the helium inspection mechanism, the transfer mechanism 7 drives the clamping component 9 to move the batteries from the helium inspection mechanism 2 to the loading position on the marking mechanism 6 line. When the batteries move to the unloading position along the line, the unloading mechanism 4 moves the defective products generated by the battery welds, marking and helium inspection to the NG pull through the clamping component 9. The belt 5 is used, and the qualified battery products are moved to the logistics conveyor line 10, so that the qualified batteries can be transferred to the next processing area. The loading mechanism 3, the transfer mechanism 7 and the unloading mechanism 4 cooperate with each other, and the application of the multi-axis module makes the one-way movement become multi-directional linkage, which saves transportation time to a certain extent. The layout integrates the helium recovery mechanism 8 and the marking mechanism 6, making it more compact in the overall structure. In addition, by placing the pipeline connecting the recovery mechanism 8 and the helium inspection mechanism 2 in the cavity inside the workbench 1, the problem of accidental damage caused by exposure of the pipeline can be avoided, thereby improving the overall aesthetic performance.

[0118] Further, refer to Figure 1-2 and Figure 7The loading mechanism 3 includes two groups of first transmission modules 31 in the X direction, a group of second transmission modules 32 in the Y direction, and a group of third transmission modules 33 in the Z direction. The first transmission module 31 is arranged on the workbench 1; the second transmission module 32 is arranged between the two groups of first transmission modules 31 in the X direction; the third transmission module 33 is arranged on the second transmission module 32. The loading mechanism 3 is used to drive the clamping component 9 to move in the three-dimensional direction to transport the battery to the specific position of the loading area of ​​the helium inspection mechanism 2. Since the two groups of first transmission modules 31 in the X direction can drive the second transmission module 32 to move in the X direction, and the second transmission module 32 can drive the third transmission module 33 to move in the Y direction, the third transmission module 33 drives the clamping component 9 to move in the vertical direction, under the cooperation between the various modules, the clamping component 9 moves in the three-dimensional direction, thereby improving the accuracy of the battery conveying position. In this embodiment, the clamping component 9 can be any one of a variable-distance clamping claw or a mechanical claw.

[0119] Further, refer to Figure 1-3 The helium detection mechanism 2 includes: a driving module 21, a positioning detection module and a vacuum box closing detection module. The driving module 21 is arranged on the workbench 1 and is located on one side of the feeding mechanism 3; the positioning detection module is arranged on the driving module 21; the vacuum box closing detection module is arranged on the workbench 1 and is located above the driving module 21. The driving module 21 is provided with three stop positions, namely the feeding area 211, the detection area 212, and the unloading area 213. The feeding area 211, the detection area 212 and the unloading area 213 are arranged in series. The vacuum box closing detection module is located in the detection area 212 of the driving module 21. When the positioning detection module moves to the loading area 211, the battery is placed on the positioning detection module by the clamping component 9 on the loading mechanism 3. Then, the positioning detection module moves to the detection area 212 under the operation of the driving module 21, so that it is located under the vacuum box closing detection module to perform battery sealing detection. After the detection is completed, the driving module 21 moves it to the unloading area 213, and then transfers it to the marking mechanism 6 through the clamping component 9 on the transfer mechanism 7.

[0120] Further, refer to Figure 3The positioning detection module includes a fixing component 23, a placement component 24, a first lifting cylinder 26 and a beam photoelectric switch 28. The fixing component 23 is arranged on the driving module 21; the placement component 24 is arranged on the fixing component 23, and a plurality of cavities 27 for placing batteries are arranged inside the placement component 24; the first lifting cylinder 26 is arranged between the fixing component 23 and the placement component 24, and is used to lift the placement component 24 to a state where it is sealed with the components at the vacuum box combination detection module; the beam photoelectric switch 28 is arranged at the four corners of the fixing component 23, and each corner is provided with two groups of beam photoelectric switches 28 of different heights, which are used to detect whether the battery is tilted when placed. In this case, the battery is placed in the cavity 27 inside the placement component 24. If the battery is not tilted, the incident light between the top photoelectric switches 28 at the four corners is not blocked, and the incident light of the photoelectric switches 28 at the bottom of the four corners is blocked. If the battery is tilted, the incident light between the top photoelectric switches 28 at the four corners is blocked. By detecting whether the battery is tilted, it is to ensure the sealing between the helium injection sealing nozzle and the battery and improve the accuracy of battery detection. When the driving module 21 drives the fixing component 23 to move to the vacuum box closing detection module, the first lifting cylinder 26 drives the placement component 24 to lift it to seal with the vacuum box closing detection module for helium detection.

[0121] Further, refer to Figure 3 and Figure 4 The vacuum box assembly detection module includes a placement rack 22, a hollow shaft cylinder 210, a helium injection sealing nozzle and a vacuum assembly 29. The placement rack 22 is set on the workbench 1 and is located above the drive module 21; the hollow shaft cylinder 210 is set on the top of the placement rack 22 and is spaced along the displacement direction of the drive module 21 and is connected to the recovery mechanism 8; the helium injection sealing nozzle is set at the bottom of the hollow shaft cylinder 210, which is used for vacuuming and helium injection inside the battery; the vacuum assembly 29 is set on the placement rack 22 and is located on one side of the hollow shaft cylinder 210 for placing the assembly 24. The interior is vacuumed, and the first lifting cylinder 26 drives the placement component 24 to rise to a state where it is sealed with the bottom of the placement rack 22. The helium injection sealing nozzle squeezes into the battery filling port. The recovery mechanism 8 first vacuums the interior of the battery through the hollow shaft cylinder 210, and then injects helium into the battery. At the same time, it is inserted into the cavity 27 corresponding to the battery through the bottom of the vacuum component 29 to perform vacuuming. During the detection process, since the cavity inside the placement component 24 is connected to the helium mass spectrometer leak detector, if the battery leaks, the helium inside the battery enters the cavity 27 and can be detected by the helium mass spectrometer leak detector.

[0122] Further, refer to Figure 3 、 Figure 5 and Figure 6The helium detection mechanism 2 also includes a helium injection nozzle cleaning mechanism 25, which is arranged at the top of the fixed component 23 and located at one end away from the feeding mechanism 3, for cleaning the helium injection sealing nozzle; the helium injection nozzle cleaning mechanism includes a fixed frame 251, a fixed plate 254, a second lifting cylinder 252, a mounting assembly 255, a driving assembly 253 and a brush assembly 256, the fixed frame 251 is arranged at the top of the fixed component 23 and located at one end away from the feeding mechanism 3; the fixed plate 254 is arranged on the fixed frame 251; the second lifting cylinder 252 is arranged between the fixed frame 251 and the fixed plate 254, for lifting the fixed plate 254; the mounting assembly 255 is rotatably arranged on the fixed plate 254, and the driving assembly 253 is arranged on the fixed The plate 254 is rotatably connected to the mounting assembly 255, and is used to drive the mounting assembly 255 to rotate in a circle; the brush assembly 256 is arranged on the inner wall of the mounting assembly 255, and is used to clean the helium injection sealing nozzle. When the driving module 21 drives the placement assembly 24 to move to the loading area 211 for loading, the fixing frame 251 moves to the bottom of the placement frame 22 and is located in the detection area 212. The second lifting cylinder 252 drives the fixing plate 254 to move upward, so that the brush assembly 256 covers the helium injection sealing nozzle. The driving assembly 253 drives the brush assembly 256 to rotate through the mounting assembly 255 to clean the helium injection sealing nozzle. The helium injection sealing nozzle is cleaned before the battery is tested. In this embodiment, the driving assembly 253 can be a combination of a motor and a transmission belt.

[0123] Further, refer to Figure 11 The transfer mechanism 7 includes a set of seventh transmission modules 71 in the Y direction and a set of eighth transmission modules 72 in the Z direction. The seventh transmission module 71 is arranged on the workbench 1 and is located above one end of the unloading area 213 of the drive module 21; the eighth transmission module 72 is arranged on the seventh transmission module 71; the transfer mechanism 7 is used to drive the clamping component to move in the three-dimensional direction to realize battery transfer. The seventh transmission module 71 can drive the eighth transmission module 72 to move in the Y direction, and the eighth transmission module 72 drives the clamping component 9 to move in the Z direction, so that multiple groups of batteries on the helium inspection mechanism 2 can be transferred to the marking mechanism 6, so that the helium inspection mechanism 2 and the marking mechanism 6 share the same clamping component 9, and the two can be organically integrated into one workstation, so that the transition line body can be omitted. In this embodiment, the clamping component 9 can be any one of a variable-distance clamping claw or a mechanical claw.

[0124] Further, refer to Figure 9The marking mechanism includes a conveying module 61, a laser marking component, a mirror reflection photoelectric switch 65, a barcode scanner 62 and a positioning module 66. The conveying module 61 is arranged on the workbench 1 and is parallel to the helium inspection mechanism 2; the laser marking component is arranged on the workbench 1 and is located on the top of the conveying module 61; the mirror reflection photoelectric switch 65 is arranged at the head and tail ends of the conveying module 61, and is used to provide feedback on the loading and unloading positions of the battery in the conveying module 61; the barcode scanner 62 is arranged on the conveying module 61 and is located on one side of the laser marking component; the positioning module 66 is arranged on the workbench 1 and is located on both sides of the conveying module 61, and is used to clamp the battery when the battery reaches the bottom of the laser marking component; the transfer mechanism 7 drives the clamping component 9 to remove the battery from the unloading area 213 of the helium inspection mechanism 2 Move to the conveying module 61, the mirror reflection photoelectric switch 65 at the head end of the conveying module 61 can detect whether the battery is placed on the conveying module 61. When the battery is moved to the bottom of the laser marking component by the conveying module 61, the battery is laser marked. At the same time, the positioning module 66 clamps the battery at the bottom of the laser marking component. On the one hand, it improves the stability of the battery under high beats, and on the other hand, it improves the accuracy of positioning to ensure that the marking position of the battery is consistent. After the battery is marked, it passes through the position of the barcode scanner 62. The barcode scanner 62 can scan the code engraved by the laser marking component to find defective products. When the battery is conveyed to the mirror reflection photoelectric switch 65 at the tail end and is flush, the mirror reflection photoelectric switch 65 can provide feedback on whether the battery on the conveying module 61 is unloaded. In this embodiment, reference Figure 10 The positioning module includes a base 661, a clamping assembly 662, two sets of driving cylinders 663 and a clamping cylinder. The base 661 is arranged below the conveying module 61, and the two ends of the base 661 extend out of the bottom of the conveying module 61; the clamping assembly 662 is arranged at both ends of the base 661 and is located on both sides of the conveying module 61; the two sets of driving cylinders 663 are respectively arranged on the side walls of both sides of the base 661, and the piston rods of the two sets of driving cylinders 663 are respectively connected to the clamping assemblies 662 at both ends of the base 661, which are used to drive the clamping assembly 662 to limit the freedom of the battery in the direction perpendicular to the streamline, and clamp The tightening cylinders are respectively arranged at the top of the clamping assembly 662, and are used to drive the clamps on the clamping assembly 662 to limit the battery's freedom in the streamline direction. When the battery moves to the bottom of the laser marking assembly, the driving cylinder 663 drives the clamping assembly 662 to move in a direction close to each other, limiting the battery's freedom in the direction perpendicular to the streamline. Then the clamping cylinder drives the clamps to move in a direction close to each other, limiting the battery's freedom in the streamline direction, and limiting the battery. On the one hand, it improves the stability of the battery under high beats, and on the other hand, it improves the accuracy of positioning to ensure that the marking position of the battery is consistent.

[0125] Further, refer to Figure 9The laser marking component includes a lifting module 64 and a laser generator 63. The lifting module 64 is set on the workbench 1 and is located on one side of the conveying module 61, and is used to adjust the height of the laser generator 63; the lifting module 64 can adjust the height of the laser generator 63, which is suitable for marking different types of batteries. The laser generator 63 is located above the NG pull belt 5. The laser generator 63 and the NG pull belt 5 adopt an up and down avoidance structure to save space, and are parallel to the helium inspection mechanism 2, so that the length of the NG pull belt 5 can be increased, and more defective batteries can be cached.

[0126] Further, refer to Figure 1-2 The recovery mechanism 8 includes an air compressor 81, a high-pressure tank 82, a low-pressure tank 85, a helium tank 83 and a nitrogen tank 84. The air compressor 81 is arranged in a cavity on one side of the workbench 1; the high-pressure tank 82 is arranged on one side of the air compressor 81 for storing a certain concentration of helium, which can be used to provide helium to the inside of the battery and is connected to the hollow shaft cylinder 210 through a pipeline; the low-pressure tank 85 is arranged below the air compressor 81 for initially storing the helium recovered from the inside of the battery and adjusting the concentration of the recovered helium in the tank by the high-concentration helium supplied by the helium tank 83; the helium tank 83 is arranged on one side of the air compressor 81 for injecting helium into the low-pressure tank 85 to adjust the concentration of the recovered helium; the nitrogen tank 84 is arranged on one side of the air compressor 81 and is connected to the vacuum pump 210. The empty component 29 is connected to remove the residual helium inside the cavity 27 of the placement component 24. When the helium is recovered, the helium in the battery first flows into the low-pressure tank 85 through its own pressure difference, and then the remaining helium inside the battery is pumped into the low-pressure tank 85 through the vacuum pump. The helium inside the low-pressure tank 85 enters the high-pressure tank 82 through the air compressor 81. When helium needs to be injected, the helium tank 83 injects high-concentration helium into the low-pressure tank 85, and then the air compressor 81 blows it into the high-pressure tank 82. The high-pressure tank 82 is added to the battery through the hollow shaft cylinder 210. The nitrogen tank 84 is connected to the vacuum component 29 to remove the residual helium inside the cavity 27 of the placement component 24, so as to avoid the residual helium in the cavity 27 affecting the detection results and improve the accuracy of the detection.

[0127] Further, refer to Figure 8The unloading mechanism 4 includes a fourth transmission module 41 in the Y direction, a fifth transmission module 42 in the X direction, and a sixth transmission module 43 in the Z direction. The fourth transmission module 41 is arranged on the workbench 1; the fifth transmission module 42 is arranged on the fourth transmission module 41; the sixth transmission module 43 is arranged on the fifth transmission module 42. The fourth transmission module 41 drives the fifth transmission module 42 to move in the Y direction, and the sixth transmission module 43 drives the fifth transmission module 42 to move in the Z direction, so that the clamping component 9 can move in the three-dimensional direction to transport the battery to the material conveying line 10. In this embodiment, the clamping component 9 can be any one of a variable-distance clamp or a mechanical clamp.

[0128] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, the technical solution of the present invention may be subjected to a variety of simple modifications, including combining the various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A helium inspection system for square-shell batteries, characterized in that: include: a workbench having a cavity; The material conveying line is set on one side of the workbench and is used to convey the workpiece to be inspected; The code scanning mechanism is arranged on the side of the material conveying line; A loading mechanism, disposed on the workbench and located above the material conveying line, for transferring the workpiece to the helium inspection mechanism; Multiple sets of helium detection mechanisms are installed on the workbench and located at one end of the loading mechanism to detect the sealing of the battery after full welding; The helium detection mechanism includes: A drive module is provided on the workbench and located at one end of the feeding mechanism; A positioning detection module is provided on the driving module; The vacuum box assembly detection module is set on the workbench and located above the drive module; The positioning detection module includes: A fixed component is provided on the driving module; A placement component is provided on the fixing component, wherein a plurality of cavities for placing batteries are provided inside the placement component; A first lifting cylinder is provided between the fixing assembly and the placing assembly, and is used to lift the placing assembly to a state where it is sealed with the components at the vacuum box closing detection module; Opposing photoelectric switches are set at the four corners of the fixed component. Each corner is provided with two sets of opposing photoelectric switches at different heights to detect whether the battery is tilted when placed; The driving module is provided with three stop positions, namely the loading area, the detection area, and the unloading area. The loading area, the helium detection area, and the unloading area are arranged in series. The vacuum box closing detection module is located in the detection area of ​​the driving module; The vacuum box closing detection module includes: A placement rack is provided on the workbench and is located above the drive module; The hollow shaft cylinder is arranged on the top of the placement frame and is spaced apart along the displacement direction of the driving module and is connected to the recovery mechanism; A helium injection sealing nozzle is provided at the bottom of the hollow shaft and is used for vacuuming and helium injection inside the battery; The vacuum pumping component is placed on the placement rack and located on one side of the hollow shaft cylinder, and is used to vacuum the interior of the placement component; The transfer mechanism is provided at one end of the helium inspection mechanism away from the feeding mechanism and is located above one end of the helium inspection mechanism, and is used to transfer the workpiece after helium inspection to the line body of the marking mechanism; The marking mechanism is located on one side of the feeding mechanism and is parallel to the helium detection mechanism. It is used to engrave codes on the battery cover and record information. The recovery mechanism is arranged on a side of the transfer mechanism away from the helium detection mechanism, and is used for supplying and recovering helium inside the helium detection mechanism; The unloading mechanism is arranged at one end of the loading mechanism and is located above the material conveying line; The clamping components are respectively arranged on the feeding mechanism, the transfer mechanism and the unloading mechanism; The NG pull tape is arranged on the workbench and is parallel to the marking mechanism, and is used to buffer defective batteries.

2. The helium inspection system for square-shell batteries according to claim 1, characterized in that: The feeding mechanism comprises: Two sets of first transmission modules in the X direction are arranged on the workbench; A set of second transmission modules in the Y direction is arranged between the two sets of first transmission modules in the X direction; A third transmission module in the Z direction is arranged on the second transmission module; The loading mechanism is used to drive the clamping assembly to move in three dimensions and transport the battery to a specific position of the helium inspection mechanism.

3. The helium inspection system for square-shell batteries according to claim 1, characterized in that: The helium detection mechanism also includes: A helium injection nozzle cleaning mechanism is provided on the top of the fixed assembly and at an end away from the feeding mechanism, and is used to clean the helium injection sealing nozzle; The helium injection nozzle cleaning mechanism comprises: A fixing frame is provided on the top of the fixing assembly and is located at an end away from the feeding mechanism; A fixing plate is arranged on the fixing frame; A second lifting cylinder is provided between the fixing frame and the fixing plate, and is used to lift the fixing plate; Install the assembly and rotate it on the fixed plate. A driving assembly is disposed on the fixing plate and is rotatably connected to the mounting assembly, and is used to drive the mounting assembly to rotate in a circular motion; The brush assembly is arranged on the inner wall of the mounting assembly and is used to clean the helium injection sealing nozzle.

4. The helium inspection system for square-shell batteries according to claim 1, characterized in that: The transfer agencies include: A seventh transmission module in the Y direction is arranged on the workbench and located above one end of the unloading position of the drive module; A set of eighth transmission modules in the Z direction, arranged on the seventh transmission module; The transfer mechanism is used to drive the clamping assembly to move in three dimensions to achieve battery transfer.

5. The helium inspection system for square-shell batteries according to claim 1, characterized in that: The marking mechanism comprises: A conveying module is arranged on the workbench and parallel to the helium detection mechanism; A laser marking assembly is disposed on the workbench and located on top of the conveying module; Mirror reflective photoelectric switches are provided at the head and tail ends of the conveying module to provide feedback on the loading and unloading positions of the batteries in the conveying module; A barcode scanner is provided on the conveying module and is located on one side of the laser marking component; The positioning module is set on the workbench and located on both sides of the conveying module, and is used to clamp the battery when it reaches the bottom of the laser marking component; The positioning module includes: A base is provided below the conveying module, with both ends of the base extending out of the bottom of the conveying module; Clamping components are arranged at both ends of the base and located on both sides of the conveying module; Two sets of driving cylinders are respectively arranged on the side walls of the base. The piston rods of the two sets of driving cylinders are respectively connected to the clamping assemblies at both ends of the base, and are used to drive the clamping assemblies to limit the freedom of the battery in the direction perpendicular to the streamline; The clamping cylinders are respectively arranged on the top of the clamping components and are used to drive the clamps on the clamping components to limit the freedom of the battery in the streamline direction.

6. The helium inspection system for square-shell batteries according to claim 5, characterized in that: The laser marking assembly includes: A lifting module is provided on the workbench and located on one side of the conveying module, and is used to adjust the height of the laser generator; The laser generator is installed on the lifting module and located above the NG pull belt.

7. The helium inspection system for square-shell batteries according to claim 1, characterized in that: The recycling mechanism includes: An air compressor is arranged in a cavity on one side of the workbench; The high-pressure tank is installed on one side of the air compressor and is used to store a certain concentration of helium. It can provide helium to the inside of the battery and is connected to the hollow shaft cylinder through a pipe; The low-pressure tank is located below the air compressor and is used to initially store the helium recovered from the battery; The helium tank is installed on the side of the air compressor and is used to inject helium into the low-pressure tank to adjust the concentration of the recovered helium; The nitrogen tank is installed on one side of the air compressor and is connected to the vacuum assembly to remove the residual helium in the cavity where the assembly is placed.

8. The helium inspection system for square-shell batteries according to claim 1, characterized in that: The blanking mechanism comprises: A fourth transmission module in the Y direction is arranged on the workbench; A fifth transmission module in the X direction, disposed on the fourth transmission module; a sixth transmission module in the Z direction, disposed on the fifth transmission module; The unloading mechanism is used to drive the clamping assembly to move in three dimensions to transport the batteries to the material conveying line or NG pull belt.

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