Battery online X-ray detection system and detection method

Abstract

The invention provides a battery online X-ray detection system and method, and the system comprises a station rotating module which bears and drives a battery moving module to rotate; the plurality of battery movement modules are annularly arranged around the axis A and rotate, and the battery movement modules are used for clamping batteries; the plurality of imaging modules surround the outer sides of the plurality of battery movement modules, the battery movement modules are arranged to be capable of driving a battery to rotate around an axis B of a vertical axis A, so that a to-be-detected part of the battery can rotate by 360 degrees, a 3D image of the to-be-detected part is obtained, and the battery movement modules are further arranged to be capable of driving the battery to rotate around an axis C of the vertical axis B, so that the 3D image of the to-be-detected part is obtained. Different to-be-detected parts of the battery are switched to imaging areas of the imaging modules, and the station rotating module can switch the battery among the plurality of imaging modules; the device further comprises a feeding unit and a discharging unit. According to the system, through the modular design, the 3D image of the to-be-detected part of the battery can be obtained, so that the defect detection is more accurate, and meanwhile, the size of system equipment can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery detection, and in particular to an online X-ray detection system and a detection method for a battery. Background Art

[0002] The X-ray nondestructive testing technology of batteries came into being under the circumstances of the increasingly intensified global energy crisis and the rapid development of new energy technologies. With the popularization of electric vehicles, the quality and safety of power batteries, as the core components of electric vehicles, are increasingly valued. Due to the large number of production processes of lithium-ion power batteries, problems such as exposed foil of pole pieces, uneven coating of pole pieces, pole ears sticking to the wall, pole ears folding, and excessive misalignment of positive and negative pole pieces often occur in finished batteries. Therefore, a detection technology is needed to detect internal defects of batteries, which can achieve the purpose of detection, improve product quality, and not affect the current production efficiency and reduce the loss rate.

[0003] Among the X-ray nondestructive testing methods currently available on the market for batteries, 2D plane testing is often used. Limited by the image information and accuracy that can be obtained with this testing method, many defects cannot be detected. In addition, in order to improve the testing efficiency, existing X-ray testing equipment arranges multiple X-ray sources (detectors) in the direction of the battery conveyor line, resulting in a large equipment size, which is not conducive to the layout of the battery production line. Summary of the invention

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides a battery online X-ray detection system and detection method.

[0005] The technical solution of the present invention is as follows:

[0006] A battery online X-ray inspection system, comprising:

[0007] The station rotation module carries and drives the battery motion module to rotate;

[0008] The battery movement module includes a plurality of batteries, which are evenly spaced in the annular direction and rotate around axis A. Axis A is the center normal of the annular shape. The battery movement module includes a battery rotating bracket and a battery clamp. The battery rotating bracket is rotatably connected to the station rotating module and can drive the battery to rotate around axis B. The battery clamp is rotatably connected to the battery rotating bracket and can drive the battery to rotate around axis C. Axis C is orthogonal to axis B, and axis B is orthogonal to axis A. The battery clamp can clamp the battery near the intersection of axis B and axis C.

[0009] The battery rotating bracket includes a connecting plate and a carrying plate connected in an L-shape, the plate surface of the connecting plate is perpendicular to the axis B and is rotatably connected to the station rotating module, the carrying plate extends away from the axis A, and the battery clamp is arranged at the extended end of the carrying plate;

[0010] A plurality of imaging modules surround the outside of the plurality of battery movement modules, and the central angle of the axis A corresponding to the adjacent imaging modules is equal to the central angle of the axis A corresponding to the adjacent battery movement modules, the imaging module includes a bracket and an X-ray source and a radiation imager mounted on the bracket, and the battery movement module can rotate the battery between the X-ray source and the radiation imager;

[0011] A loading unit, used for placing batteries into the battery fixture;

[0012] The unloading unit is used to remove the battery from the battery fixture.

[0013] The detection system of the present application can rotate the inspected part of the battery 360 degrees between the X-ray source and the radiation imager through a battery rotating bracket, thereby obtaining a 3D image of the inspected part, and can more comprehensively and accurately detect whether the battery has defects, thereby improving the accuracy and comprehensiveness of the detection.

[0014] In the above scheme, the battery movement module also includes a position rotation drive member, which is located inside the corner of the battery rotation bracket and is connected to the battery fixture. By making full use of the space inside the corner of the battery movement module, it is possible to avoid occupying the space outside the battery movement module, which is more conducive to reducing the space occupied by the detection system and facilitating the setting of the station rotation module. In addition, it is possible to make the rotation drive member closer to the axis B, making the rotation of the battery rotation bracket easier to control and requiring less driving force.

[0015] Furthermore, the driving end of the position rotation driving component and the connecting end of the battery clamp both pass through the supporting plate and are connected by a synchronous belt on the outside of the supporting plate, so that the driving point of the rotation driving component on the battery clamp and the action point of the battery on the battery clamp are respectively located on both sides of the supporting plate, thereby making the rotation of the battery clamp as balanced as possible, reducing the rotation burden at the connection between the battery clamp and the supporting plate, and improving the smoothness of rotation and service life.

[0016] The battery clamp specifically includes a clamping part and a rotating part. The clamping part is adjustably connected to the rotating part. By adjusting the position of the clamping part relative to the connecting part, the battery can be moved so that the center of the battery is located on the axis C when the battery is not placed properly.

[0017] Preferably, the workstation rotation module includes a workbench, a bearing assembly arranged on the top of the workbench and a workstation rotation drive assembly that drives the bearing assembly to rotate horizontally, the bearing assembly is provided with a workstation assembly corresponding to the battery movement module, and the workstation assembly is provided with an imaging rotation drive component that drives the battery rotation bracket to rotate.

[0018] In the present application, the loading unit includes a loading conveyor line and a loading robot arm, and the unloading unit includes a defect conveyor line and an unloading robot arm. The loading robot arm and the unloading robot arm are respectively located upstream and downstream of the loading conveyor line, and the defect conveyor line is arranged close to the unloading robot arm. The loading conveyor line and the defect conveyor line are arranged at a right angle, and the station rotation module is located on the inner side of the right angle.

[0019] In order to facilitate the placement and removal of batteries, the number of battery movement modules is two more than the number of imaging modules, which are used to place batteries in the battery fixture and take batteries out of the battery fixture respectively.

[0020] In order to improve the application range of the detection system, the position of the X-ray source and / or the radiation imager can be adjusted, and then the position can be adaptively adjusted according to the rules of the battery to be inspected, so as to obtain accurate and clear imaging.

[0021] Specifically, two three-axis displacement seats are provided on the bracket, and the three-axis displacement seats include an X-axis displacement plate, a Y-axis displacement plate and a Z-axis displacement plate which are slidably connected in sequence and whose sliding directions are perpendicular to each other. The X-ray source and the radiation imager are respectively mounted on the two X-axis displacement plates, and the Z-axis displacement plate is slidably connected to the bracket, and can move the X-ray source and the radiation imager closer or farther away.

[0022] In addition, the present application also provides a battery online X-ray detection method, based on the above-mentioned battery online X-ray detection system, comprising the following steps:

[0023] S1, the loading unit starts and puts the battery into the battery fixture;

[0024] S2, driving the battery fixture to rotate a preset angle α, and rotating a to-be-measured angle of the battery to the extension direction of the axis B and away from the axis A;

[0025] S3, the station rotation module is started, driving the battery movement module to rotate a preset angle, and the battery to be tested is turned between the X-ray source and the radiation imager;

[0026] S4, driving the battery rotating bracket to rotate 360 ​​degrees, synchronously, starting and stopping the X-ray source and the radiation imager at the same time;

[0027] S5, driving the battery fixture to rotate sequentially by another preset angle, rotating another angle of the battery to be measured to a position in the extending direction of the axis B and away from the axis A, and repeating steps S3 and S4;

[0028] S6, repeat step S5 until all the angles to be measured are detected;

[0029] S7, driving the battery fixture to rotate sequentially by a preset angle α, and the unloading unit removes the battery from the battery fixture.

[0030] The present invention provides a battery online X-ray detection system and detection method, which can enable the part to be inspected of the battery to rotate 360 ​​degrees between the X-ray source and the radiation imager through a battery rotating bracket, thereby obtaining a 3D image of the part to be inspected. At the same time, through modular design, under the premise of small equipment size, by configuring an appropriate number of imaging modules, battery movement modules, and workstation rotation modules, online 3D X-ray detection that meets the requirements of the battery production line can be achieved, providing comprehensive and rich three-dimensional image information and higher detection accuracy for defect identification, effectively expanding the detectable battery defect range, while reducing the system equipment size and facilitating the site layout of the detection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In the attached picture:

[0032] Figure 1 It is the axial side schematic diagram of the detection system;

[0033] Figure 2 It is a top view schematic diagram of the detection system;

[0034] Figure 3 It is a schematic diagram of the station rotation module;

[0035] Figure 4 is a schematic diagram of the battery motion module;

[0036] Figure 5 is a schematic diagram of an imaging module;

[0037] Figure 6 A schematic diagram of different detection locations for the battery motion module to drive the battery motion;

[0038] Figure 7 It is a schematic diagram of switching between different workstations of the workstation rotation module;

[0039] Figure 8 A schematic diagram of the detection process for detecting the four corners of a battery;

[0040] Fig. 9 is a schematic diagram of a battery motion module of Embodiment 3;

[0041] Fig.10 Schematic diagram of the mechanism for adjusting the position of the clamping portion in Example 3.

[0042] The components represented by the reference numerals in the figure are:

[0043] 1. Workstation rotation module; 11. Workbench; 12. Bearing assembly; 13. Workstation rotation drive assembly; 14. Workstation assembly; 15. Imaging rotation drive member; 151. Gear ring; 2. Battery movement module; 21. Battery rotation bracket; 211. Connecting plate; 212. Loading plate; 22. Battery clamp; 221. Clamping part; 222. Rotating part; 223. Adjusting rod; 23. Position rotation drive member; 24. Adjusting drive mechanism; 241. Moving part; 242. Driving rod; 243. Sliding wheel; 3. Imaging module; 31. Bracket; 32. X-ray source; 33. X-ray imager; 34. Three-axis displacement seat; 41. Loading conveyor line; 42. Loading robot arm; 51. Defect conveyor line; 52. Unloading robot arm. DETAILED DESCRIPTION

[0044] Embodiment 1

[0045] like Figures 1 to 5 As shown, this embodiment provides a battery online X-ray inspection system (hereinafter referred to as the inspection system) for continuous 3D inspection of batteries. For batteries, the positions where defects are usually more likely to occur are the outer edges of the battery, especially the four corners of the battery, so this embodiment takes the inspection of the four corners of the battery as an example.

[0046] The detection system specifically includes a station rotation module 1, a battery movement module 2, an imaging module 3, a loading unit and an unloading unit.

[0047] Among them, the station rotation module 1 is used to carry and drive the battery movement module 2 to rotate, and the battery movement module 2 includes multiple, evenly spaced annularly arranged, and rotates around the axis A, and the axis A is the central normal of the ring. Axis A can be a vertical line or a horizontal line, that is, multiple battery movement modules 2 can be distributed horizontally or vertically. When distributed vertically, the overall footprint of the detection system can be smaller, and when distributed horizontally, the support of the station rotation module 1 to the battery movement module 2 and the force of the battery movement module 2 on the driving battery when rotating are more balanced, and the rotation action is more stable.

[0048] In this embodiment, the axis A is a vertical line, and a plurality of battery movement modules 2 are horizontally arranged and rotated in a circular direction.

[0049] The battery movement module 2 includes a battery rotating bracket 21 and a battery clamp 22 .

[0050] The battery rotating bracket 21 is rotatably connected to the station rotating module 1 and can drive the battery to rotate around the axis B. The axis B is a radial line corresponding to the position of each battery movement module 2 when it is circumferentially distributed, and it is orthogonal to the axis A.

[0051] The battery clamp 22 is rotatably connected to the battery rotating bracket 21 and can drive the battery to rotate around the axis C. The axis C is orthogonal to the axis B. The battery clamp 22 can clamp the battery near the intersection of the axis B and the axis C.

[0052] There are multiple imaging modules 3, and the number of imaging modules 3 and battery motion modules 2 can be increased or decreased according to the actual needs of the battery production line. Multiple imaging modules 3 surround the outside of multiple battery motion modules 2, and the positions are fixed. The center angle of the axis A corresponding to the adjacent imaging modules 3 is equal to the center angle of the axis A corresponding to the adjacent battery motion module 2, so that during the detection, each imaging module 3 will correspond to a battery under detection, realizing the continuous operation of the detection system.

[0053] In order to facilitate the placement and removal of the battery, the number of the battery movement modules 2 is two more than the number of the imaging modules 3, which are respectively used to place the battery in the battery fixture 22 and to remove the battery from the battery fixture 22. For example, in this embodiment, there are four imaging modules 3 and six battery movement modules 2, wherein after each rotation, there are four battery movement modules 2 corresponding to four imaging modules 3, that is, there are four detection positions, and the two empty battery movement modules 2 are empty positions, which are used to facilitate the placement and removal of the battery, and do not affect the detection operation of the four detection positions.

[0054] The loading unit is used to place batteries into the battery fixture 22 , and includes a loading conveyor line 41 and a loading robot arm 42 . The loading robot arm 42 takes out the batteries to be inspected conveyed on the loading conveyor line 41 and places them into the battery fixture 22 .

[0055] The unloading unit is used to remove batteries from the battery fixture 22, including a defect conveyor line 51 and an unloading robot arm 52. The unloading robot arm 52 removes the batteries from the battery fixture 22, and places defective batteries on the defect conveyor line 51 and non-defective batteries on the loading conveyor line 41 according to different battery inspection results.

[0056] The loading conveyor line 41 and the defect conveyor line 51 are arranged at a right angle, and the station rotation module 1 is located inside the right angle. The loading robot arm 42 and the unloading robot arm 52 are respectively located upstream and downstream of the loading conveyor line 41, and the unloading robot arm 52 is arranged close to the defect conveyor line 51.

[0057] The detection system of the present application can switch the parts of the battery to be inspected to correspond to the multiple imaging modules 3 respectively through the rotation of the battery fixture 22 and the rotation of the station rotation module 1, so as to realize step-by-step and continuous detection of the battery. And through the rotation of the battery rotation bracket 21, the battery can be rotated 360 degrees, and then a 3D image of the part to be inspected is obtained to improve the accuracy and comprehensiveness of the detection results.

[0058] The following is a detailed description with reference to the accompanying drawings:

[0059] like Figure 3 As shown, the station rotation module 1 includes a workbench 11, a bearing assembly 12 arranged on the top of the workbench 11, and a station rotation driving assembly 13 for driving the bearing assembly 12 to rotate horizontally. A plurality of station assemblies 14 corresponding to the battery motion modules 2 are fixed on the bearing assembly 12, and an imaging rotation driving member 15 (see FIG. 1 ) is provided on the station assembly 14 to drive the battery rotation bracket 21 to rotate. Figure 4 ). Through the rotation of the bearing assembly 12, the multiple battery motion modules 2 are rotated in a circular manner to switch the workstations.

[0060] like Figure 4 As shown, the battery rotating bracket 21 specifically includes a connecting plate 211 and a supporting plate 212 connected in an L-shape. The plate surface of the connecting plate 211 is perpendicular to the axis B and is connected to the driving end of the imaging rotating driving member 15 on the workstation rotation module 1. The supporting plate 212 extends away from the A axis. The battery clamp 22 is arranged at the extended end of the supporting plate 212 to facilitate the rotation of the detection position of the battery to cooperate with the imaging module 3.

[0061] The L-shaped battery rotating bracket 21 can be used to accommodate batteries, and can make the center of the battery closer to or located on the axis B, so as to reduce the centrifugal force of the battery when the battery rotating bracket 21 rotates.

[0062] The battery movement module 2 also includes a position rotation driving member 23, which is located inside the corner of the battery rotation bracket 21 and is transmission-connected to the battery clamp 22. Furthermore, the driving end of the position rotation driving member 23 and the connecting end of the battery clamp 22 both pass through the carrier plate 212 and are connected by a synchronous belt on the outside of the carrier plate 212, so that the driving point of the rotation driving member on the battery clamp 22 and the point of action of the battery on the battery clamp 22 are respectively located on both sides of the carrier plate 212, thereby making the force on the battery clamp 22 more balanced and the rotation more stable when rotating, reducing the rotation load at the connection between the battery clamp 22 and the carrier plate 212, and improving the smoothness and service life of the battery clamp 22 when rotating.

[0063] The position rotation driving member 23 is arranged on the inner side of the battery rotation bracket 21. By making full use of the space inside the corner of the battery movement module 2, it is possible to avoid occupying the outer space of the battery movement module 2, which is more conducive to reducing the size of the detection equipment and does not interfere with the work station rotation module 1. The width of the work station rotation module 1 can be set according to actual load requirements.

[0064] In addition, the position rotation drive member 23 is arranged on the inner side of the battery rotation bracket 21, which is not only stable to be installed, but also closer to the axis B. When the battery rotation bracket 21 rotates, the centrifugal torque generated by the position rotation drive member 23 is smaller, making it easier for the imaging rotation drive member 15 to drive the battery rotation bracket 21 to rotate, and the start and stop are more flexible.

[0065] like Figure 5 As shown, the imaging module 3 includes a bracket 31 and an X-ray source 32 and a radiation imager 33 mounted on the bracket 31 , and the battery movement module 2 can move the battery between the X-ray source 32 and the radiation imager 33 .

[0066] The X-ray source 32 is used to emit X-rays required for system detection, and the ray imager 33 is used to receive the light information of the X-ray source 32 after passing through the battery to generate projection data.

[0067] In this embodiment, the bracket 31 is installed vertically and parallel to the axis A, and the X-ray source 32 and the radiation imager 33 are arranged vertically opposite to each other, and the X-ray source 32 is located below the radiation imager 33. The X-ray source 32 and / or the radiation imager 33 can be fixed on the bracket 31 or connected to the bracket 31 with adjustable position.

[0068] In this embodiment, two three-axis displacement seats 34 are provided on the bracket 31. The three-axis displacement seats 34 include an X-axis displacement plate, a Y-axis displacement plate and a Z-axis displacement plate which are slidably connected in sequence and whose sliding directions are perpendicular to each other. The X-ray source 32 and the radiation imager 33 are respectively mounted on the two X-axis displacement plates. The Z-axis displacement plate is slidably connected to the bracket 31 and can move the X-ray source 32 and the radiation imager 33 closer to or away from each other.

[0069] In this way, it is possible not only to debug the imaging correspondence between the X-ray source 32 and the radiation imager 33, but also to adjust the positions of the X-ray source 32 and the radiation imager 33 according to the specifications of the battery to be inspected, so that the part of the battery to be inspected can enter between the X-ray source 32 and the radiation imager 33, thereby improving the adaptability of the detection system.

[0070] The beneficial effects of the present invention are as follows: through modular design, under the premise of a small equipment size, by configuring an appropriate number of imaging modules 3 and battery movement modules 2, online 3D X-ray detection that meets the requirements of the battery production line can be achieved, providing rich three-dimensional image information and higher detection accuracy for defect identification, effectively expanding the scope of detectable battery defects, and reducing the size of the system equipment.

[0071] Embodiment 2

[0072] The present application also provides a battery online X-ray detection method (hereinafter referred to as the detection method), based on the battery online X-ray detection system described in Example 1. This embodiment is described by taking the detection of the four corners of the battery as an example. Please also refer to Figure 6-8 As shown, the four corners of the battery to be tested are numbered A1 to A4 in sequence, and the station assembly 14 includes six stations, which are numbered B1 to B6 in sequence.

[0073] The detection method comprises the following steps:

[0074] S1, the loading unit starts and puts the battery into the battery fixture 22. The initial position of the battery is as follows: Figure 6 As shown in the upper left position of the figure;

[0075] S2, driving the battery fixture 22 to rotate a preset angle α, and turning a battery angle to be measured (angle A1) to the extension direction of the axis B and away from the axis A, such as Figure 6 As shown in the figure at the middle left position;

[0076] S3, the station rotation module 1 is started, driving the battery movement module 2 to rotate from the initial position of the station to a preset angle, and the battery to be measured is rotated to between the X-ray source 32 and the ray imager 33. The initial position of the station is as follows Figure 7 The B1 position shown in the lower left figure is as follows: Figure 7 As shown in the upper left figure;

[0077] S4, driving the battery rotating bracket 21 to rotate 360 ​​degrees, synchronously starting and stopping the X-ray source 32 and the ray imager 33, acquiring a 3D image of the battery corner A1, and sending it to the background for processing and judgment;

[0078] S5, driving the battery fixture 22 to rotate sequentially by a preset angle β, and rotating another angle of the battery to be measured (angle A2) to a position in the extending direction of the axis B and away from the axis A, such as Figure 6 The right middle position is shown in the figure, and the actions of the station rotation module 1 and the battery rotation bracket 21 and the X-ray source 32 and the ray imager 33 in steps S3 and S4 are repeated. At this time, the station position is as shown in FIG. Figure 7 As shown in the upper middle figure;

[0079] S6, repeat the actions of the station rotation module 1, the battery movement module 2 and the imaging module 3 in step S5, but the battery fixture 22 rotates in turn according to the angle 2*α and the angle β, until the angle A3 and the angle A4 are also detected. That is, all the angles to be measured are detected. At this time, the station position is as follows Figure 7 As shown in the lower right figure;

[0080] S7, repeat the action of the station rotating module 1 in step S3, and the station position is as follows Figure 7 As shown in the middle right figure, the battery fixture 22 is then driven to rotate sequentially by a preset angle α, so that the battery fixture 22 returns to the initial position of the battery, and the unloading unit removes the battery from the battery fixture 22;

[0081] S8. Repeat the action of the station rotating module 1 in step S3 to return the station component 14B1 to the initial position of the station.

[0082] In some other embodiments, when the number of battery motion modules 2 is the same as that of imaging modules 3 , step S7 is to directly execute the action of driving the battery clamp 22 to sequentially rotate the preset angle α, and the unloading unit removes the battery from the battery clamp 22 .

[0083] Among them, in step S7, the unloading robot arm 52 of the unloading assembly places the battery on the loading conveyor line 41 or the defect conveyor line 51 according to the detection result of the battery.

[0084] It should also be noted that the remaining battery movement modules 2 all start from the initial position of the station and execute steps S1-S8 in sequence, wherein the corresponding relationship between the station assembly 14, the corners of each battery to be inspected, and the loading and unloading robot 52 is as follows: Figure 8 shown.

[0085] It should also be noted that in some other embodiments, in steps S2, S3, S5 and S7, the movement of the battery clamp 22 and the station rotation module 1 can be performed simultaneously.

[0086] Embodiment 3

[0087] The present application also provides a battery online X-ray detection system, which has a structure basically the same as that of Example 1, except that the battery clamp 22 includes a clamping portion 221 and a rotating portion 222, the clamping portion 221 includes two oppositely arranged claws, and the clamping portion 221 is adjustably connected to the rotating portion 222. By adjusting the position of the clamping portion 221 relative to the rotating portion 222, the position of the battery can be moved when the battery is not placed properly, so that the center of the battery is located on the axis C.

[0088] When the loading robot arm 42 puts the battery into the battery clamp 22, it is very likely to be placed incorrectly, especially when the battery size is changed, causing the battery center to deviate from the axis C, and then causing the battery corners to collide with, for example, the connecting plate 211 or the position rotation drive 23 when the battery clamp 22 rotates, which can affect the rotation of the battery clamp 22 and deviate from the imaging area of ​​the imaging unit, affecting the imaging. The battery center deviation is almost always along the vertical direction of the vertical surface where the two clamping claws of the battery clamp 22 are located.

[0089] When the battery specifications and sizes are changed, it is usually necessary to manually adjust the rotation angle of the battery clamp 22 and make corresponding changes to the clamping action parameters of the loading and unloading robot arm 52, which is not smart and convenient, and affects the detection efficiency.

[0090] In this regard, in this embodiment, the clamping portion 221 of the battery clamp 22 is designed to be position-adjustable to automatically adjust the center position of the battery according to the specific specifications of the battery to be inspected, thereby improving the inspection efficiency of the inspection system.

[0091] Specifically, Fig. 9 and Fig.10 As shown, the rotating part 222 is rotatably connected with an adjusting rod 223, which is perpendicular to the vertical plane where the two clamping claws are located and has a gear at one end. The lower end of the clamping part 221 is threadedly connected to the adjusting rod 223, and moves axially along the adjusting rod 223 when the adjusting rod 223 rotates.

[0092] When the battery is in the initial position, that is, the battery clamp 22 is located Figure 6 When in the position shown in the upper left position figure, the adjusting rod 223 is parallel to the axis B, and the gear is located close to the axis A.

[0093] The connecting plate 211 of the battery rotating bracket 21 is slidably connected to the adjusting driving mechanism 24, and the adjusting driving mechanism 24 includes a moving part 241 slidably connected to the connecting plate 211, and a driving rod 242 is rotatably connected to the moving part 241. The driving rod 242 passes through the connecting plate 211, and both ends extend in the direction of the axis C and the axis A, and gears are provided at both ends. The connecting plate 211 is provided with an avoidance hole corresponding to the driving rod 242.

[0094] A toothed ring 151 is provided on the side of the imaging rotary drive member 15 facing the battery rotary drive member, and its center is located on the axis B. A sliding wheel 243 is also provided on the moving member 241, which cooperates with the inner ring of the toothed ring 151 and slides along the inner ring of the toothed ring 151 as the battery rotary bracket 21 rotates. A groove is provided at the lowest point of the inner ring of the toothed ring 151, and teeth are provided on the outer ring of the toothed ring 151.

[0095] When the sliding wheel 243 slides out of the groove of the inner ring of the gear ring 151, the driving rod 242 can be driven to move through the moving part 241, so that the gear on the end of the driving rod 242 close to the gear ring 151 is engaged with the outer ring of the gear ring 151. At the same time, if the battery clamp 22 is in the initial position of the battery, the gear on the end of the driving rod 242 close to the battery clamp 22 can be engaged with the gear on the adjusting rod 223. At this time, the battery rotating bracket 21 continues to be rotated, and the gear ring 151 will drive the driving rod 242 to rotate, thereby driving the adjusting rod 223 to adjust the position of the clamping portion 221 of the battery clamp 22.

[0096] In this embodiment, preferably, two adjusting rods 223 and two driving rods 242 are provided, and both are symmetrically arranged relative to the plane where the axis B and the axis C are located.

[0097] In this embodiment, the gear at one end of the driving rod 242 is preferably located directly below the gear at one end of the adjusting rod 223 .

[0098] In addition, a distance measuring sensor (not shown in the figure) is provided on the side of the connecting plate 211 facing the battery clamp 22, and angular displacement sensors (not shown in the figure) are provided on the imaging rotation drive 15 and the position rotation drive 23. The detection system is also provided with a control unit (not shown in the figure), which is electrically connected to the distance measuring sensor, the angular displacement sensor, and the imaging rotation drive 15 and the position rotation drive 23.

[0099] The battery movement module 2 in this embodiment can directly utilize the imaging rotation drive component 15 and the position rotation drive component 23 as drives to achieve the adjustment of the battery position without adding an additional power device, which increases the cost. At the same time, it will not cause the volume of the battery movement module 2 to increase, and will not affect the overall reduction in the size of the detection system equipment.

[0100] Embodiment 4

[0101] The present application also provides another battery online X-ray detection method, based on the detection system shown in Example 3, specifically, on the basis of Example 2, the following steps are added between S1 and S2:

[0102] S1a, the distance sensor obtains the distance S between the battery corner A2 and the corner A3 and the connecting plate 211 23 ;

[0103] S1b, the starting battery fixture 22 is rotated 90 degrees three times in sequence, and the distance measuring sensor obtains the distance S of the remaining edge of the battery from the connecting plate 211 in sequence. 34 , S 41 , S 12 ;

[0104] S1c, according to formula S 长 =2*S C -S 23 -S 41 , S 宽 =2*S C -S 34 -S 12 , calculate the length and width of the battery, and then use ∠α=arctan(S 宽 / S 长 ), ∠β=180°-2*α, calculate the values ​​of the rotation angles ∠α and ∠β of the battery clamp 22 during detection, where S C is the known distance between the axis C and the connecting plate 211;

[0105] S1d, according to formula S 差 =(S 23 -S 41 ) / 2, determine whether the battery center is located on the axis C. If S 差If it is 0, it is determined that the center of the battery is located on the axis C, and S2 and subsequent steps of the second embodiment are executed;

[0106] If S 差 If it is a positive value, it is determined that the center of the battery is closer to the axis A relative to the axis C, and step S1e is executed;

[0107] If S 差 If it is a negative value, it is determined that the center of the battery is biased away from the axis A relative to the axis C, and step S1f is executed;

[0108] S1e, driving the battery rotating bracket 21 to rotate clockwise, and then executing S2 and subsequent steps of the second embodiment;

[0109] Among them, include:

[0110] S1e1, according to the groove size of the inner ring of the gear ring 151, rotate the preset angle so that the gears at both ends of the driving rod 242 are respectively meshed with the gears of the gear ring 151 and the adjusting rod 223;

[0111] S1e2, according to the known gear ratio between the gear ring 151 and the driving rod 242, the gear ratio between the driving rod 242 and the adjusting rod 223, and the thread pitch on the adjusting rod 223, the clamping portion 221 is driven to move S 差 distance,

[0112] S1f, driving the battery rotating bracket 21 to rotate counterclockwise. The specific action process is the same as S1e1 and S1e2, which will not be repeated here. Then, S2 and subsequent steps of the second embodiment are executed.

[0113] It should also be noted that when executing step S2 of Example 2, after driving the battery clamp 22 to rotate the preset angle α, the gear of the adjustment rod 223 rotates away from the meshing position and is disconnected from the driving rod 242. Before executing step S4 of Example 2, the battery rotation bracket 21 is rotated back to the initial position, that is, the sliding wheel 243 is rotated back to the groove of the gear ring 151 so as not to affect the battery clamp 22 from rotating the battery.

[0114] This embodiment can intelligently calibrate various data when changing battery specifications, so that the detection system has a wider range of uses, especially in the case of mixed battery testing.

Claims

1. A battery online X-ray inspection system, characterized in that: include: The station rotating module (1) carries and drives the battery movement module (2) to rotate; The battery movement module (2) comprises a plurality of batteries which are evenly spaced in an annular direction and rotate around an axis A, wherein the axis A is the center normal of the annular shape. The battery movement module (2) comprises a battery rotating bracket (21) and a battery clamp (22). The battery rotating bracket (21) is rotatably connected to the station rotating module (1) and can drive the battery to rotate around an axis B. The battery clamp (22) is rotatably connected to the battery rotating bracket (21) and can drive the battery to rotate around an axis C. The axis C is orthogonal to the axis B, and the axis B is orthogonal to the axis A. The battery clamp (22) can clamp the battery near the intersection of the axis B and the axis C. The battery rotating bracket (21) comprises a connecting plate (211) and a carrying plate (212) connected in an L-shape, the plate surface of the connecting plate (211) being perpendicular to the axis B and being rotatably connected to the station rotating module (1), the carrying plate (212) extending in a direction away from the axis A, and the battery clamp (22) being arranged at the extended end of the carrying plate (212); A plurality of imaging modules (3) surround the outside of the plurality of battery movement modules (2), and the center angle of the axis A corresponding to the adjacent imaging modules (3) is equal to the center angle of the axis A corresponding to the adjacent battery movement module (2), the imaging module (3) comprises a bracket (31) and an X-ray source (32) and a radiation imager (33) mounted on the bracket (31), and the battery movement module (2) is capable of rotating the battery between the X-ray source (32) and the radiation imager (33); A loading unit, used for placing batteries into the battery fixture (22); The unloading machine group is used for taking out the battery from the battery clamp (22).

2. A battery online X-ray inspection system as claimed in claim 1, characterized in that: The battery movement module (2) also includes a position rotation driving member (23), which is located inside the corner of the battery rotation bracket (21) and is drivingly connected to the battery clamp (22).

3. A battery online X-ray inspection system as claimed in claim 2, characterized in that: The driving end of the position rotation driving member (23) and the connecting end of the battery clamp (22) both pass through the supporting plate (212) and are connected via a synchronous belt on the outside of the supporting plate (212).

4. A battery online X-ray inspection system as claimed in claim 3, characterized in that: The battery clamp (22) comprises a clamping portion (221) and a rotating portion (222); the clamping portion (221) is connected to the rotating portion (222) in an adjustable manner.

5. A battery online X-ray inspection system as claimed in claim 4, characterized in that: The station rotation module (1) comprises a workbench (11), a bearing assembly (12) arranged on the top of the workbench (11), and a station rotation driving assembly (13) for driving the bearing assembly (12) to rotate horizontally, a station assembly (14) corresponding to the battery motion module (2) is arranged on the bearing assembly (12), and an imaging rotation driving member (15) for driving the battery rotation bracket (21) to rotate is arranged on the station assembly (14).

6. The battery online X-ray inspection system according to claim 1, characterized in that: The loading unit comprises a loading conveyor line (41) and a loading robot arm (42), and the unloading unit comprises a defect conveyor line (51) and an unloading robot arm (52). The loading robot arm (42) and the unloading robot arm (52) are respectively located upstream and downstream of the loading conveyor line (41), and the defect conveyor line (51) is arranged close to the unloading robot arm (52). The loading conveyor line (41) and the defect conveyor line (51) are arranged at a right angle, and the workstation rotation module (1) is located on the inner side of the right angle.

7. The battery online X-ray inspection system according to claim 1, characterized in that: The number of the battery movement modules (2) is two more than the number of the imaging modules (3).

8. The battery online X-ray inspection system according to claim 1, characterized in that: The positions of the X-ray source (32) and / or the radiation imager (33) are adjustable.

9. A battery online X-ray inspection system as claimed in claim 8, characterized in that: The support (31) is provided with two three-axis displacement seats (34), and the three-axis displacement seats (34) include an X-axis displacement plate, a Y-axis displacement plate, and a Z-axis displacement plate, which are slidably connected in sequence and whose sliding directions are perpendicular to each other. The X-ray source (32) and the radiation imager (33) are respectively mounted on the two X-axis displacement plates, and the Z-axis displacement plate is slidably connected to the support (31) and can move the X-ray source (32) and the radiation imager (33) closer or farther away.

10. A battery online X-ray inspection method, based on a battery online X-ray inspection system according to any one of claims 1 to 9, characterized in that: The steps include: S1, the loading unit is started to place the battery on the battery fixture (22); S2, driving the battery fixture (22) to rotate a preset angle α, so that an angle of the battery to be measured is rotated to the extension direction of the axis B and away from the axis A; S3, the station rotation module (1) is started, driving the battery movement module (2) to rotate a preset angle, and rotating the battery to be measured to between the X-ray source (32) and the radiation imager (33); S4, driving the battery rotating bracket (21) to rotate 360 ​​degrees, and synchronously starting and stopping the X-ray source (32) and the radiation imager (33); S5, driving the battery clamp (22) to rotate sequentially by another preset angle, rotating another angle of the battery to be measured to a position in the extending direction of the axis B and away from the axis A, and repeating steps S3 and S4; S6, repeat step S5 until all the angles to be measured are detected; S7, driving the battery clamp (22) to rotate sequentially by a preset angle α, and the unloading unit removes the battery from the battery clamp (22).

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