A method and device for online detection of cell alignment

Abstract

The application provides an electric core alignment online detection method and device, wherein the electric core alignment online detection method comprises the following steps: placing the electric core on a conveying belt and moving to a detection area in sequence; performing angle detection by a first electric core clamping and jacking rotary CT detection mechanism; after detection, rotating the first electric core, detecting another angle and returning; continuing to move the conveying belt, clamping and jacking the first electric core and the subsequent two electric cores, and performing angle detection by the rotary CT detection mechanism; after detection, rotating the three electric cores, respectively detecting another angle and returning; continuing to move the conveying belt, and detecting the subsequent electric cores one by one. By adopting the technical scheme, the electric core alignment can be quickly and accurately detected, the detection efficiency is improved, and the practicality is high.

Description

Technical Field

[0001] This invention relates to the field of battery cell testing technology, and more specifically, to a method and apparatus for online testing of battery cell alignment. Background Technology

[0002] With the nation's increased emphasis on environmental protection, the new energy industry has benefited significantly. In particular, the production capacity and supply of lithium-ion batteries for new energy vehicles have seen a surge. Lithium-ion batteries are the most widely used type of battery due to their large energy storage capacity and long lifespan. The core manufacturing processes for lithium-ion cells are stacking and winding. Regardless of the process used, the manufacturing of lithium-ion cells requires strict process control and quality inspection to ensure the performance, safety, and stability of the cells.

[0003] The manufacturing process of stacked lithium-ion batteries mainly includes electrode preparation, electrode stacking, and electrode hot pressing. During electrode stacking, a predetermined number of positive and negative electrodes, along with a separator, need to be stacked. If the relative positions of the electrodes (e.g., positive / negative electrodes relative to each other or positive electrode relative to negative electrode) do not meet production requirements, such as the positive active coating extending beyond the negative active coating, it will pose a safety hazard to the battery.

[0004] Currently, on battery cell production lines, it is necessary to inspect the electrode alignment of the cells. Existing technology generally uses X-ray inspection equipment for non-destructive testing of the cells. Through X-ray non-destructive testing, the internal structure of the cell can be observed very clearly, including the position and alignment of the electrodes. This method does not require damaging or disassembling the cell, making it very suitable for inspecting already packaged cells.

[0005] In current CT inspection of battery cells, most CT equipment still operates offline as standalone units because CT scans require a long time to complete image acquisition and reconstruction. Offline CT refers to placing the object to be inspected in the CT equipment for scanning, and then transmitting the scan data to a computer for image reconstruction and analysis. Offline CT inspection of battery cells is inefficient, impacts production capacity, and fails to meet the rapidly growing market demand for lithium batteries. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an online detection method and device for battery cell alignment, which can realize rapid and accurate detection of battery cell alignment, improve detection efficiency, and enhance practicality.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an online detection method for battery cell alignment, the detection method comprising the following steps:

[0008] S1: Place each battery cell to be tested on the conveyor belt in sequence. The conveyor belt drives each battery cell to be tested to move from left to right, moving two battery cell stations each time.

[0009] S2: When the first battery cell moves to the first battery cell clamping and lifting rotating mechanism, the conveyor belt stops moving. The first battery cell clamping and lifting rotating mechanism first clamps the first battery cell in a cross shape, and then lifts the first battery cell to a certain height so that it is removed from the conveyor belt.

[0010] S3: The first battery cell clamping and lifting rotation mechanism drives the first battery cell to rotate clockwise by a specific angle, so that the upper right corner of the first battery cell rotates to the center line of the first CT detection mechanism;

[0011] S4: The first CT detection mechanism rotates at a constant speed to detect the upper right corner of the first battery cell;

[0012] S5: After the first CT detection mechanism has finished detecting the upper right corner of the first battery cell, the first battery cell clamping and lifting rotation mechanism rotates counterclockwise by a specific angle to rotate the lower right corner of the first battery cell to the center line of the first CT detection mechanism.

[0013] S6: The first CT detection mechanism rotates at a constant speed to detect the lower right corner of the first battery cell;

[0014] S7: After the test is completed, the first battery cell clamping and lifting rotation mechanism returns to the zero position, so that the length direction of the first battery cell is parallel to the conveyor belt conveying direction. Then the first battery cell clamping and lifting rotation mechanism descends and places the first battery cell on the conveyor belt.

[0015] S8: The first battery cell clamping, lifting and rotating mechanism releases the first battery cell, the conveyor belt starts and drives each battery cell to move two battery cell stations and then stops;

[0016] S9: The third cell clamping, lifting and rotating mechanism first clamps the first cell in a cross shape, then lifts it off the conveyor belt and rotates it clockwise by a specific angle to rotate the lower left corner of the first cell to the center line of the second CT detection mechanism for detection.

[0017] S10: The second battery cell clamping, lifting and rotating mechanism first clamps the second battery cell in a cross shape, then lifts it off the conveyor belt and rotates it counterclockwise by a specific angle, rotating the lower right corner of the second battery cell to the center line of the second CT detection mechanism, while the upper left corner of the second battery cell rotates to the center line of the first CT detection mechanism and is then detected.

[0018] S11: The first cell clamping, lifting and rotating mechanism first clamps the third cell in a cross shape, then lifts it off the conveyor belt and rotates it clockwise by a specific angle to rotate the upper right corner of the third cell to the center line of the first CT detection mechanism for detection.

[0019] S12: After the test is completed, the third cell clamping and lifting rotation mechanism rotates counterclockwise by a specific angle to rotate the upper left corner of the first cell to the center line of the second CT detection mechanism and perform the test.

[0020] S13: The second battery cell clamping and lifting rotation mechanism rotates clockwise by a specific angle, rotating the upper right corner of the second battery cell to the center line of the second CT detection mechanism, and at the same time rotating the lower left corner of the second battery cell to the center line of the first CT detection mechanism for detection.

[0021] S14: The first cell clamping and lifting rotation mechanism rotates counterclockwise by a specific angle to rotate the lower right corner of the third cell to the center line of the first CT detection mechanism and perform detection.

[0022] S15: After the inspection is completed, all the battery cell clamping and lifting rotation mechanisms return to the zero position, so that the length direction of each battery cell is parallel to the conveyor belt conveying direction. Then, all the battery cell clamping and lifting rotation mechanisms descend at the same time, placing each battery cell on the conveyor belt. All the battery cell clamping and lifting rotation mechanisms release each battery cell at the same time, and the conveyor belt starts, moving two battery cell stations from left to right again. This cycle is repeated to check the alignment of subsequent battery cells.

[0023] At least one battery cell is provided at each battery cell station on the conveyor belt, and the battery cells at each battery cell station are stacked together.

[0024] Furthermore, the first CT inspection unit and the second CT inspection unit obtain the cell angular image through x-ray imaging.

[0025] Furthermore, the center lines of the first CT detection mechanism and the second CT detection mechanism are the axis of the beam emitted by the X-ray source.

[0026] Furthermore, in step S8, after the conveyor belt stops moving, the first battery cell moves to the third battery cell clamping and lifting rotating mechanism, the second battery cell moves to the second battery cell clamping and lifting rotating mechanism, and the third battery cell moves to the first battery cell clamping and lifting rotating mechanism.

[0027] Furthermore, in step S10, after the second cell clamping and lifting rotation mechanism rotates, the lower left corner of the first cell and the lower right corner of the second cell are symmetrical and do not interfere with each other.

[0028] Furthermore, in order to improve detection efficiency, steps S9, S10 and S11 perform rotation and detection actions simultaneously. After the detection is completed, steps S12, S13 and S14 perform rotation and detection actions simultaneously.

[0029] In addition, the present invention also provides an online detection device for battery cell alignment for implementing the above detection method, including a conveyor belt, a battery cell clamping and lifting rotation mechanism and a CT detection mechanism. Two CT detection mechanisms are symmetrically installed on the left and right sides. The conveyor belt passes horizontally through the detection area of ​​the two CT detection mechanisms. Three battery cell clamping and lifting rotation mechanisms are installed at equal intervals in the conveying direction of the conveyor belt.

[0030] Furthermore, the cell clamping, lifting, and rotating mechanism includes a clamping device, a lifting device, and a rotating device. The clamping device is installed at the upper end of the lifting device, and the rotating device is installed at the lower end of the lifting device.

[0031] Furthermore, the clamping device is specifically a cross clamping device, used to clamp the battery cell simultaneously in orthogonal directions.

[0032] Furthermore, the clamping device includes a cross clamping jaw, a base, and a transmission device. The cross clamping jaw is mounted on the base and includes two pairs of mutually perpendicular clamping jaws. Each pair of clamping jaws is provided with an adjustable clamping plate. The clamping force is adjusted by a screw. The transmission device is mounted on the base and connected to the cross clamping jaw to control its clamping or loosening.

[0033] In summary, the present invention has the following beneficial effects:

[0034] The present invention provides an online cell alignment detection method, which, compared with the existing offline single-machine detection method, enables rapid and accurate batch detection of cell alignment by setting up an online cell alignment detection device and combining it with the method of the present invention. This meets the market demand for rapid development of lithium batteries, increases production capacity, significantly improves detection efficiency, and the entire detection process is fully automated, requiring no manual operation, thus ensuring high safety and greater practicality. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of detecting the first cell after rotation in the online cell alignment detection method of the present invention;

[0036] Figure 2 This is a schematic diagram illustrating the detection of three rotated battery cells in the online battery cell alignment detection method of the present invention;

[0037] Figure 3 This is a schematic flowchart of the online cell alignment detection method of the present invention.

[0038] In the diagram: 1. Conveyor belt; 2. First battery cell; 3. Second battery cell; 4. Third battery cell; 5. First battery cell clamping, lifting and rotating mechanism; 6. Second battery cell clamping, lifting and rotating mechanism; 7. Third battery cell clamping, lifting and rotating mechanism; 8. First CT detection mechanism; 9. Second CT detection mechanism. Detailed Implementation

[0039] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0040] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0041] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0042] like Figure 1-3 As shown, the present invention provides an online detection method for battery cell alignment, specifically including the following steps:

[0043] S1: Place each battery cell to be tested on the conveyor belt 1 in sequence. The conveyor belt 1 drives each battery cell to be tested to move from left to right. The conveyor belt 1 moves two battery cell positions each time.

[0044] The specific steps are as follows:

[0045] Place the battery cells to be tested sequentially at the starting position of conveyor belt 1, ensuring that the battery cells are placed stably on conveyor belt 1.

[0046] Start conveyor belt 1 to move the first and second battery cells from left to right. The speed of conveyor belt 1 should be properly controlled to ensure proper spacing between the battery cells and avoid collisions or accumulation.

[0047] After the first movement is completed, wait for a period of time to allow the third and fourth cells to enter the movement range.

[0048] Restart conveyor belt 1 to move the third and fourth cells from left to right. Again, the speed should be appropriately controlled to maintain proper spacing between the cells.

[0049] Repeat the above steps until all the cells to be tested have been moved to the target position in sequence.

[0050] It is important to ensure the stability of conveyor belt 1 and the safety of the battery cells during operation. Furthermore, parameters such as the speed and interval of conveyor belt 1 need to be adjusted according to specific circumstances to achieve optimal operating results and production efficiency.

[0051] S2: When the first battery cell 2 moves to the first battery cell clamping and lifting rotating mechanism 5, the conveyor belt 1 stops moving. The first battery cell clamping and lifting rotating mechanism 5 first clamps the first battery cell 2 in a cross shape, and then lifts the first battery cell 2 to a certain height so that it is separated from the conveyor belt 1.

[0052] When the first battery cell 2 reaches the designated position, stop the movement of the conveyor belt 1 to ensure it stays in the correct position. Align the clamping jaws of the clamping device with the cross-shaped symmetrical position of the battery cell to ensure that the clamping device is accurately and stably locked on the battery cell, placing it at the coordinate origin position of the clamping device.

[0053] Activate the lifting device to raise the first battery cell 2 to a certain height within the detection area of ​​the CT inspection mechanism, allowing the CT inspection mechanism to perform uniform inspection around the battery cell. This height should be sufficient to allow the battery cell to detach from the conveyor belt 1, with adequate clearance for subsequent processing. Ensure the lifting process is smooth to avoid damaging the battery cell.

[0054] S3: The first cell clamping and lifting rotation mechanism 5 drives the first cell 2 to rotate clockwise by a specific angle, so that the upper right corner of the first cell 2 rotates to the center line of the first CT detection mechanism 8;

[0055] Once powered on, the X-ray source and detector in a CT scan facility remain in the X-ray on state, rotating continuously at a constant speed to perform online real-time detection.

[0056] During the cell rotation, monitor the cell's position and status, and make adjustments as needed. Verify that the upper right corner of the first cell 2 has rotated to the center line of the first CT detection mechanism 8. If misaligned, make fine adjustments as needed until the cell's position meets the requirements.

[0057] Specifically, the center lines of the first CT detection unit 8 and the second CT detection unit 9 are both the axis of the X-ray beam emitted by the X-ray source.

[0058] S4: The first CT detection mechanism 8 rotates at a constant speed to detect the upper right corner of the first battery cell 2;

[0059] Control the rotation speed of the first CT inspection mechanism 8 according to actual needs. Ensure the rotation speed is uniform and stable to guarantee the accuracy of the inspection results. Ensure the distance between the battery cell and the inspection device is appropriate and its position is stable. Process the inspection results accordingly, record the battery cell parameters, defects, or other relevant information, and conduct further analysis or judgment as needed.

[0060] The alignment of the battery cell is determined to be qualified based on the size deviation between the actual size and the theoretical size of the light spot generated by the light received by the optical detection unit and the position deviation between the actual position and the theoretical position of the light spot.

[0061] Dimensional deviation judgment between actual and theoretical dimensions: The actual size of the light spot received by the optical detection unit is compared with the theoretical size. The theoretical size can be determined by measuring equipment or a pre-set standard. If the difference between the actual and theoretical sizes exceeds the preset allowable range, the alignment is judged to be unqualified.

[0062] Position deviation judgment between actual and theoretical positions: The actual position of the light spot received by the optical detection unit is compared with the theoretical position. The theoretical position can be determined according to the equipment design or a pre-set alignment reference. The alignment can be evaluated by calculating the deviation between the actual and theoretical positions (such as deviations in the horizontal and vertical directions). If the position deviation exceeds the preset allowable range, the alignment is judged to be unqualified.

[0063] When determining whether the alignment of battery cells is acceptable, an appropriate tolerance range should be set based on specific requirements and application scenarios. The tolerance ranges for dimensional and positional deviations may vary depending on the type of battery cell and the operating environment.

[0064] S5: After the first CT detection mechanism 8 finishes detecting the upper right corner of the first battery cell 2, the first battery cell clamping and lifting rotation mechanism 5 rotates counterclockwise by a specific angle to rotate the lower right corner of the first battery cell 2 to the center line of the first CT detection mechanism 8.

[0065] The purpose of rotating the first battery cell 2 counterclockwise is to enable the CT detection mechanism to detect the two corners of one end of the battery cell from the same position, thereby improving detection efficiency.

[0066] S6: The first CT detection mechanism 8 rotates at a constant speed to detect the lower right corner of the first battery cell 2;

[0067] S7: After the test is completed, the first battery cell clamping and lifting rotation mechanism 5 returns to the zero position, so that the length direction of the first battery cell 2 is parallel to the conveying direction of the conveyor belt 1. Then the first battery cell clamping and lifting rotation mechanism 5 descends and places the first battery cell 2 on the conveyor belt 1.

[0068] The first cell 2 has completed the detection of the upper and lower corners on its right end, so it needs to continue moving forward to detect the upper and lower corners on the left end of the first cell 2.

[0069] S8: The first battery cell clamping, lifting and rotating mechanism 5 releases the first battery cell 2, the conveyor belt 1 starts and drives each battery cell to move two battery cell stations and then stops;

[0070] After the conveyor belt 1 stops moving, the first battery cell 2 moves to the third battery cell clamping and lifting rotating mechanism 7, the second battery cell 3 moves to the second battery cell clamping and lifting rotating mechanism 6, and the third battery cell 4 moves to the first battery cell clamping and lifting rotating mechanism 5.

[0071] S9: The third cell clamping, lifting and rotating mechanism 7 first clamps the first cell 2 in a cross shape, then lifts it off the conveyor belt 1 and rotates it clockwise by a specific angle to rotate the lower left corner of the first cell 2 to the center line of the second CT detection mechanism 9 and perform detection.

[0072] S10: The second battery cell clamping, lifting and rotating mechanism 6 first clamps the second battery cell 3 in a cross shape, then lifts it away from the conveyor belt 1 and rotates it counterclockwise by a specific angle, rotating the lower right corner of the second battery cell 3 to the center line of the second CT detection mechanism 9, while the upper left corner of the second battery cell 3 rotates to the center line of the first CT detection mechanism 8 and performs detection.

[0073] At this time, the lower left corner of the first battery cell 2 is symmetrical with the lower right corner of the second battery cell 3, and they do not interfere with each other. The uniform rotation of the second CT detection mechanism 9 simultaneously performs online detection on the two corners of the two battery cells, which improves the detection efficiency and meets the requirements of industrial production.

[0074] S11: The first cell clamping, lifting and rotating mechanism 5 first clamps the third cell 4 in a cross shape, then lifts it off the conveyor belt 1 and rotates it clockwise by a specific angle to rotate the upper right corner of the third cell 4 to the center line of the first CT detection mechanism 8 and perform detection.

[0075] After the upper right corner of the third cell 4 is rotated into position, it is symmetrical to the upper left corner of the second cell 3 after rotation. The first CT detection mechanism 8 simultaneously performs online detection on both corners.

[0076] To improve detection efficiency, the clamping, lifting, and rotation of the first battery cell 2, the second battery cell 3, and the third battery cell 4 are all performed simultaneously; the first CT detection mechanism 8 and the second CT detection mechanism 9 are both in a state of continuously emitting X-rays and rotating at a constant speed for detection.

[0077] Specifically, steps S9, S10 and S11 can perform rotation and detection actions simultaneously. After the detection is completed, steps S12, S13 and S14 can perform rotation and detection actions simultaneously to improve detection efficiency.

[0078] S12: After the test is completed, the third cell clamping and lifting rotation mechanism 7 rotates counterclockwise by a specific angle to rotate the upper left corner of the first cell 2 to the center line of the second CT detection mechanism 9 and perform the test.

[0079] S13: The second cell clamping and lifting rotation mechanism 6 rotates clockwise by a specific angle, rotating the upper right corner of the second cell 3 to the center line of the second CT detection mechanism 9, and at the same time rotating the lower left corner of the second cell 3 to the center line of the first CT detection mechanism 8 and performing detection.

[0080] S14: The first cell clamping and lifting rotation mechanism 5 rotates counterclockwise by a specific angle to rotate the lower right corner of the third cell 4 to the center line of the first CT detection mechanism 8 and perform detection.

[0081] Once the corner positions of each battery cell are rotated into place, the first CT detection mechanism 8 and the second CT detection mechanism 9 begin to acquire images and perform alignment detection on the first battery cell 2, the second battery cell 3, and the third battery cell 4.

[0082] S15: After the inspection is completed, all the battery cell clamping and lifting rotation mechanisms return to the zero position, so that the length direction of each battery cell is parallel to the conveying direction of conveyor belt 1. Then, all the battery cell clamping and lifting rotation mechanisms descend at the same time, placing each battery cell on conveyor belt 1. All the battery cell clamping and lifting rotation mechanisms release each battery cell at the same time, and conveyor belt 1 starts, moving two battery cell stations from left to right again. This cycle is repeated to check the alignment of subsequent battery cells.

[0083] To improve testing efficiency and meet the production capacity requirements of industrial development, at least one battery cell is installed at each battery cell station on the conveyor belt. The battery cells at each station are stacked in the height direction, and the stacked battery cells should be aligned so that when the battery cells at each station rotate, the corners can be rotated to the center line of the CT testing mechanism.

[0084] Specifically, in the above steps, both the first CT detection unit 8 and the second CT detection unit 9 obtain the angular image of the battery cell through x-ray imaging.

[0085] In addition, the present invention also relates to an online detection device for battery cell alignment, including a conveyor belt 1, a battery cell clamping and lifting rotation mechanism and a CT detection mechanism. Two CT detection mechanisms are installed symmetrically on the left and right sides. The conveyor belt 1 passes horizontally through the detection area of ​​the two CT detection mechanisms. Three battery cell clamping and lifting rotation mechanisms are installed at equal intervals in the conveying direction of the conveyor belt 1.

[0086] Specifically, the first CT detection mechanism 8 is installed on the left side, and the second CT detection mechanism 9 is installed on the right side. On the conveyor belt 1, from left to right, they are the first battery cell clamping and lifting rotation mechanism 5, the second battery cell clamping and lifting rotation mechanism 6, and the third battery cell clamping and lifting rotation mechanism 7.

[0087] Conveyor belt 1 is a device used to transport battery cells. Specifically, it includes the following main structures:

[0088] Belt body: The belt body is the core part of the conveyor belt 1, and is made of rubber, polymer, or metal materials. Belt bodies are available in two forms: cross-strip and tubular. The appropriate type is selected based on the characteristics of the material and the conveying requirements. In this embodiment, since the conveyed battery cells are relatively flat and rigid, a cross-strip belt body is selected.

[0089] Cables: Cables are used to support and reinforce the belt to maintain its strength and shape stability. Cables are made of steel wire rope or synthetic fiber materials.

[0090] Drive unit: The drive unit is the power source for conveyor belt 1, used to provide power to propel the conveyor belt 1 to transport materials. The drive unit includes an electric motor, a reducer, and drive wheels, etc.

[0091] Preferably, in this embodiment, the motor is a stepper motor or a servo motor. Stepper motors or servo motors have high motion accuracy and can better meet the transportation requirements of the conveyor belt 1 moving two battery cell stations each time.

[0092] Tensioning device: The tensioning device is used to adjust and maintain the tension of the conveyor belt 1 to ensure the normal operation of the belt and the stable conveying of materials. The tensioning device is one of the following: a counterweight tensioning device, a slider tensioning device, or a helical spring tensioning device.

[0093] Support structure: The support structure is the base frame of the conveyor belt 1, used to support and fix the conveyor belt 1 system. The support structure is constructed of a steel frame or a concrete base to ensure the stable operation and safety of the conveyor belt 1.

[0094] Guiding device: The guiding device is used to guide the movement of materials on conveyor belt 1 and prevent materials from deviating from the track. The guiding device includes side plates, guide rollers, guide rolls, etc.

[0095] Cleaning device: The cleaning device is used to remove dirt and residue from the surface of the conveyor belt 1 to maintain the cleanliness of the belt and good friction characteristics. The cleaning device includes scrapers, brushes, water spray devices, etc.

[0096] A CT inspection facility is a device that uses computed tomography (CT) technology for non-destructive testing. It is mainly used on industrial production lines for three-dimensional inspection and analysis of parts, products, or materials.

[0097] CT scans involve placing the object under test on a rotating stage and using X-rays to penetrate it, acquiring projection data from multiple angles. Computer algorithms then use this projection data to back-project a three-dimensional image, enabling precise analysis and measurement of the object's internal structure, defects, dimensions, and other characteristics.

[0098] Specifically, CT scan facilities include the following main structures:

[0099] X-ray emission system (X-ray source): Used to generate high-energy X-ray beams that penetrate the object being measured. The X-ray source generates X-rays through high-voltage electrodes and an anode.

[0100] Detection system (detector): Used to receive the radiation information after passing through the object being measured. The detector is selected from one of the following: scintillator detector, direct conversion detector, or indirect conversion detector.

[0101] Rotary stage: The object to be measured is fixed on the rotary stage, and projection data at multiple angles is acquired through rotation. The rotary stage is automatically controlled, and the rotation speed and angle can be adjusted as needed.

[0102] Control system: Used to control the entire detection process, including the operating parameters of the X-ray source and detector, the motion control of the rotary table, and data acquisition and processing functions.

[0103] Data acquisition and reconstruction system: used to acquire the projection data received by the detector, and to perform image reconstruction and 3D reconstruction to generate the internal structure of the object under test.

[0104] Display and Analysis System: Used to display and analyze generated 3D images, providing functions such as measurement, defect analysis, and sample comparison.

[0105] In addition, CT scan facilities also include auxiliary systems, such as cooling systems and safety systems, to ensure the normal operation and safety of the equipment.

[0106] The cell clamping, lifting, and rotating mechanism primarily performs the actions of clamping, lifting, or rotating the battery cells. It is a piece of equipment used in battery production lines, mainly for clamping and positioning battery cells, and achieving lifting and rotation functions. Specifically, the mechanism includes a clamping device, a lifting device, and a rotating device.

[0107] The clamping device is mainly used to fix the battery cell, ensuring it does not move or tilt during testing. It employs methods such as pneumatic clamping, mechanical clamping, or vacuum adsorption, depending on production requirements. Specifically, the clamping device is a cross-clamping device, capable of clamping the battery cell simultaneously in orthogonal directions, aligning the cell with the center of the clamping mechanism, resulting in high clamping accuracy. The clamping device includes cross-clamping jaws, a base, and a transmission mechanism. The cross-clamping jaws, mounted on the base, consist of two pairs of mutually perpendicular jaws. Each pair of jaws has an adjustable clamping plate, and the clamping force is adjusted via a screw. The transmission mechanism, mounted on the base and connected to the cross-clamping jaws, controls the clamping or releasing of the battery.

[0108] The lifting device controls the lifting and lowering movement of the clamping device to accommodate the processing needs of battery cells at different heights. It is implemented using hydraulic cylinders or pneumatic cylinders, which can precisely control the lifting height.

[0109] The rotating device is used to rotate the clamped battery cell. It is driven by a motor and achieves the rotational movement through transmission methods such as gears, belts, or chains.

[0110] The clamping, lifting, and rotating mechanism enables the clamping, lifting, and rotating of battery cells, improving the automation level and production efficiency of the battery production line while ensuring precise processing and reliable quality of the battery cells.

[0111] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An on-line method for detecting the alignment of an electric cell, characterized in that, The detection method includes the following steps: S1: Place each battery cell to be tested on the conveyor belt in sequence. The conveyor belt drives each battery cell to be tested to move from left to right, moving two battery cell stations each time. S2: When the first battery cell moves to the first battery cell clamping and lifting rotating mechanism, the conveyor belt stops moving. The first battery cell clamping and lifting rotating mechanism first clamps the first battery cell in a cross shape, and then lifts the first battery cell to a certain height so that it is removed from the conveyor belt. S3: The first battery cell clamping and lifting rotation mechanism drives the first battery cell to rotate clockwise by a specific angle, so that the upper right corner of the first battery cell rotates to the center line of the first CT detection mechanism; S4: The first CT detection mechanism rotates at a constant speed to detect the upper right corner of the first battery cell; S5: After the first CT detection mechanism has finished detecting the upper right corner of the first battery cell, the first battery cell clamping and lifting rotation mechanism rotates counterclockwise by a specific angle to rotate the lower right corner of the first battery cell to the center line of the first CT detection mechanism. S6: The first CT detection mechanism rotates at a constant speed to detect the lower right corner of the first battery cell; S7: After the test is completed, the first battery cell clamping and lifting rotation mechanism returns to the zero position, so that the length direction of the first battery cell is parallel to the conveyor belt conveying direction. Then the first battery cell clamping and lifting rotation mechanism descends and places the first battery cell on the conveyor belt. S8: The first battery cell clamping, lifting and rotating mechanism releases the first battery cell, the conveyor belt starts and drives each battery cell to move two battery cell stations and then stops; S9: The third cell clamping, lifting and rotating mechanism first clamps the first cell in a cross shape, then lifts it off the conveyor belt and rotates it clockwise by a specific angle to rotate the lower left corner of the first cell to the center line of the second CT detection mechanism for detection. S10: The second battery cell clamping, lifting and rotating mechanism first clamps the second battery cell in a cross shape, then lifts it off the conveyor belt and rotates it counterclockwise by a specific angle, rotating the lower right corner of the second battery cell to the center line of the second CT detection mechanism, while the upper left corner of the second battery cell rotates to the center line of the first CT detection mechanism and is then detected. S11: The first cell clamping, lifting and rotating mechanism first clamps the third cell in a cross shape, then lifts it off the conveyor belt and rotates it clockwise by a specific angle to rotate the upper right corner of the third cell to the center line of the first CT detection mechanism for detection. S12: After the test is completed, the third cell clamping and lifting rotation mechanism rotates counterclockwise by a specific angle to rotate the upper left corner of the first cell to the center line of the second CT detection mechanism and perform the test. S13: The second battery cell clamping and lifting rotation mechanism rotates clockwise by a specific angle, rotating the upper right corner of the second battery cell to the center line of the second CT detection mechanism, and at the same time rotating the lower left corner of the second battery cell to the center line of the first CT detection mechanism for detection. S14: The first cell clamping and lifting rotation mechanism rotates counterclockwise by a specific angle to rotate the lower right corner of the third cell to the center line of the first CT detection mechanism and perform detection. S15: After the inspection is completed, all the battery cell clamping and lifting rotation mechanisms return to the zero position, so that the length direction of each battery cell is parallel to the conveyor belt conveying direction. Then, all the battery cell clamping and lifting rotation mechanisms descend at the same time, placing each battery cell on the conveyor belt. All the battery cell clamping and lifting rotation mechanisms release each battery cell at the same time, and the conveyor belt starts, moving two battery cell stations from left to right again. This cycle is repeated to check the alignment of subsequent battery cells. At least one battery cell is provided at each battery cell station on the conveyor belt, and the battery cells at each battery cell station are stacked together.

2. The method of claim 1, wherein, The first CT inspection unit and the second CT inspection unit obtain the cell angular image through x-ray imaging.

3. The method of claim 1, wherein the method comprises: The center lines of the first CT detection unit and the second CT detection unit are the axis of the beam emitted by the X-ray source.

4. The method for online detection of cell alignment according to claim 1, characterized in that, In step S8, after the conveyor belt stops moving, the first battery cell moves to the third battery cell clamping and lifting rotating mechanism, the second battery cell moves to the second battery cell clamping and lifting rotating mechanism, and the third battery cell moves to the first battery cell clamping and lifting rotating mechanism.

5. The method for online detection of cell alignment according to claim 1, characterized in that, In step S10, after the second cell clamping and lifting rotation mechanism rotates, the lower left corner of the first cell and the lower right corner of the second cell are symmetrical and do not interfere with each other.

6. The method for online detection of cell alignment according to claim 1, characterized in that, To improve detection efficiency, steps S9, S10 and S11 involve simultaneous rotation and detection actions. After detection is completed, steps S12, S13 and S14 involve simultaneous rotation and detection actions.

7. An online cell alignment detection device, used to implement the online cell alignment detection method as described in any one of claims 1 to 6, characterized in that, It includes a conveyor belt, a battery cell clamping, lifting and rotating mechanism, and a CT detection mechanism. Two CT detection mechanisms are installed symmetrically on the left and right sides. The conveyor belt passes horizontally through the detection areas of the two CT detection mechanisms. Three battery cell clamping, lifting and rotating mechanisms are installed at equal intervals in the conveying direction of the conveyor belt.

8. The online cell alignment detection device according to claim 7, characterized in that, The battery cell clamping, lifting, and rotating mechanism includes a clamping device, a lifting device, and a rotating device. The clamping device is installed at the upper end of the lifting device, and the rotating device is installed at the lower end of the lifting device.

9. The online cell alignment detection device according to claim 8, characterized in that, The clamping device is specifically a cross clamping device, used to clamp the battery cell simultaneously in orthogonal directions.

10. The online cell alignment detection device according to claim 8, characterized in that, The clamping device includes a cross clamping jaw, a base, and a transmission device. The cross clamping jaw is mounted on the base and includes two pairs of mutually perpendicular clamping jaws. Each pair of clamping jaws is provided with an adjustable clamping plate. The clamping force is adjusted by a screw. The transmission device is mounted on the base and connected to the cross clamping jaw to control its clamping or loosening.

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