Tab visual inspection rolling system and method suitable for battery module

Abstract

The invention relates to the technical field of intelligent battery module rolling detection, in particular to a tab visual inspection rolling system and method suitable for a battery module, and provides a tab visual inspection rolling system comprising a position adjusting mechanism, a rolling mechanism, a top face visual inspection mechanism and a side face visual inspection mechanism. Wherein the adjusting mechanism can adjust the horizontal position and height of the rolling mechanism so as to perform rolling processing on tabs of different batches of battery modules, and the processing condition of the tabs can be detected based on a visual form after rolling processing, so that on one hand, the detection precision is improved compared with the existing manual detection or spot check; and on the other hand, the labor intensity of manual detection is greatly reduced. The first top surface visual detection part, the second top surface visual detection part, the first side surface visual detection part and the second side surface visual detection part are arranged, so that the rolling quality is detected from two dimensions, the defect type thickness uniformity comprehensive evaluation is realized, and the misjudgment rate is reduced.

Description

Technical Field

[0001] This invention relates to the field of intelligent battery module rolling inspection technology, specifically a visual inspection rolling system and method for battery module tabs. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the requirements for the manufacturing precision of lithium-ion batteries' tabs are becoming increasingly stringent. Although current mainstream tab rolling systems have made progress in automated flattening, such as adopting designs with double-speed conveyor lines and linear module-driven rollers, significant defects still exist in the quality inspection process, restricting the safety and consistency of battery modules.

[0003] Traditional rolling systems generally rely on offline sampling or manual visual inspection. Contact thickness gauges require system shutdown and take more than 30 seconds per test, which is unsuitable for high-speed production lines operating at 60m / min. Manual visual inspection is affected by subjective factors, resulting in a high rate of missed defects such as wrinkles and microcracks. More seriously, existing systems lack the ability to monitor dynamic thickness fluctuations during the rolling process. For example, when thermal deformation of the rolls causes abnormal local pressure, the tab thickness deviation can reach ±0.05mm, but such problems are often only discovered after the welding process, resulting in batch rework.

[0004] Meanwhile, most rolling mill equipment is only equipped with a single-point laser thickness sensor, whose measurement range is limited to 5%-10% of the tab width. For 600mm wide tabs, the thickness uniformity of the central area and the edge cannot be obtained simultaneously, resulting in a process blind spot of "thickening at the edge and thinning at the center". At the same time, the detection of two-dimensional surface defects is seriously inadequate: wrinkles and deformations only appear as grayscale differences in 2D images, and it is difficult for humans to distinguish between 0.1mm deep indentations and oil stain shadows, while micron-level cracks are almost invisible to the naked eye on high-speed production lines.

[0005] To compensate for the loopholes in the inspection, companies have been forced to add manual re-inspection stations. Each production line needs to be equipped with 3-5 quality inspectors, inspecting an average of 2,000 tabs per day. The misjudgment rate caused by human fatigue increases with working hours. Although this "semi-automated" mode can barely maintain the pass rate, it increases the cost of inspecting a single tab and becomes a bottleneck for capacity improvement - the high-speed rolling equipment runs at a reduced speed while waiting for inspection results, resulting in insufficient actual capacity utilization. Summary of the Invention

[0006] The purpose of this invention is to provide a visual inspection and rolling system and method for battery module tabs, addressing the aforementioned problems.

[0007] The technical solution adopted in this invention is as follows: a battery module tab visual inspection rolling system, including a tab visual inspection rolling box, through which a double-speed conveyor line passes, and a tooling tray belt is placed on the double-speed conveyor line. A battery module is placed in the tooling tray belt, and the tabs of the battery module are exposed. The tab visual inspection rolling box is provided with a position adjustment mechanism and a rolling mechanism, and a top visual inspection mechanism and a side visual inspection mechanism are provided on the outside of the tab visual inspection rolling box.

[0008] The adjusting mechanism is connected to the rolling mechanism, and the adjusting mechanism can adjust the horizontal position and height of the rolling mechanism;

[0009] The rolling mechanism can abut against the tabs of the battery module and can roll and press the tabs tightly;

[0010] The top-side visual inspection mechanism is used to acquire images of the top of the battery module before and after the tabs are rolled, and transmit them to the processor;

[0011] The side visual inspection mechanism is used to acquire images of the front and rear sides of the battery module's tabs before and after rolling, and transmit them to the processor.

[0012] Optionally, the adjustment mechanism includes an adjustment crossbar, a first adjustment seat, and a second adjustment seat;

[0013] The adjusting crossbar is provided with a horizontal sliding groove;

[0014] The first adjusting seat is mounted on the adjusting crossbar and can move laterally along the horizontal slide under the control of the power component;

[0015] The second adjusting seat is disposed on the first adjusting seat and is connected to the rolling mechanism.

[0016] Optionally, the side of the first adjusting seat facing away from the adjusting crossbar is provided with a vertical sliding groove, and a push motor is provided on the top of the first adjusting seat;

[0017] The second adjusting seat can move up and down along the vertical slide groove under the action of the driving motor.

[0018] Optionally, the rolling mechanism includes a rolling roller, a rolling frame, and a roller shaft;

[0019] The rolling frame is connected to the second adjusting seat;

[0020] One end of the roller shaft is connected to the rolling roller, and the other end extends out from the rolling frame;

[0021] The rolling roller can abut against the tabs of the battery module and can roll and press the tabs.

[0022] Optionally, the top surface visual inspection mechanism includes a first top surface visual inspection component and a second top surface visual inspection component, and is located along the conveying direction of the double-speed conveyor line. The first top surface visual inspection component is located behind the tab visual inspection rolling box and is used to collect images of the top of the battery module after the tabs have been rolled. The second top surface visual inspection component is located in front of the tab visual inspection rolling box and is used to collect images of the top of the battery module before the tabs have been rolled.

[0023] Optionally, both the first and second top surface visual detection components include a horizontal plate, a ring-shaped supplementary light source, a vertical rod, and an image visual acquisition unit.

[0024] The horizontal plate is connected to the electrode visual inspection rolling box;

[0025] The annular supplementary light source is located at the bottom of the horizontal plate;

[0026] One end of the vertical rod is connected to the horizontal plate, and the other end is connected to the image vision acquisition unit. The vertical rod passes through the ring-shaped supplementary light source.

[0027] The image acquisition unit's acquisition head is oriented towards the high-speed conveyor line.

[0028] Optionally, the side visual inspection mechanism includes a first side visual inspection component and a second side visual inspection component, and is located along the conveying direction of the double-speed conveyor line. The first side visual inspection component is located behind the tab visual inspection rolling box and is used to collect the thickness image of the side of the battery module after the tab is rolled. The second side visual inspection component is located in front of the tab visual inspection rolling box and is used to collect the thickness image of the side of the battery module before the tab is rolled.

[0029] Optionally, both the first side vision detection component and the second side vision detection component include a height adjustment component, a crossbar, and a thickness vision acquisition unit.

[0030] The height adjustment component is connected to the side wall of the electrode visual inspection rolling box;

[0031] The crossbar is mounted on the height adjustment component and is aligned with the conveying direction along the double-speed conveyor line.

[0032] The thickness visual acquisition unit is mounted on the crossbar, with the acquisition head facing the tooling pallet belt.

[0033] This application provides a visual inspection and rolling system for battery module tabs, and also a visual inspection and rolling method for battery module tabs, comprising the following steps:

[0034] Image synchronous acquisition and preprocessing: The first top surface visual detection component and the second top surface visual detection component respectively acquire the highlight images of the electrode surface after processing by the electrode visual detection rolling box and before processing; the first side visual detection component and the second side visual detection component respectively acquire the edge contour and thickness images of the electrode after processing by the electrode visual detection rolling box and before processing.

[0035] The processor extracts features from the highlight image of the electrode surface and determines defects;

[0036] The processor measures the thickness in the electrode edge contour and thickness image, and detects the thickness uniformity;

[0037] The test data is integrated and the test results are fed back.

[0038] Optionally, the processor uses a local binary method to extract surface texture features from the highlight image of the electrode surface and identifies abnormal regions through a segmentation network;

[0039] The processor extracts the edge contour of the tab and the two side boundaries in the thickness image, calculates the vertical pixel distance, obtains the actual thickness, and judges the thickness uniformity.

[0040] The beneficial effects of the present invention include at least one of the following;

[0041] 1. A tab visual inspection rolling system is provided, comprising a position adjustment mechanism, a rolling mechanism, a top visual inspection mechanism, and a side visual inspection mechanism. The adjustment mechanism can adjust the horizontal position and height of the rolling mechanism to perform rolling processing on the tabs of different batches of battery modules. After the rolling process, the processing status can be inspected visually. On the one hand, the inspection accuracy is improved compared with the existing manual inspection or sampling inspection, and on the other hand, the workload of manual inspection is greatly reduced.

[0042] 2. In terms of structure, the height and horizontal position of the rolling roller are changed by setting the adjusting crossbar, the first adjusting seat and the second adjusting seat, so that it can fit with the tabs of the battery module to be processed during processing.

[0043] 3. By setting up a first top surface visual inspection component and a second top surface visual inspection component, a first side surface visual inspection component and a second side surface visual inspection component, the quality of rolling is detected from two dimensions, so as to achieve a comprehensive evaluation of the thickness uniformity of defect types and reduce the misjudgment rate. Attached Figure Description

[0044] Figure 1 A schematic diagram of a visual inspection and rolling system for electrode tabs in battery modules;

[0045] Figure 2 Schematic diagram of the adjusting mechanism and the rolling mechanism;

[0046] Figure 3 A schematic diagram of another adjusting mechanism and rolling mechanism;

[0047] Figure 4 This is a schematic diagram of the side-view visual inspection mechanism.

[0048] Figure 5 This is a schematic diagram of the tooling pallet strap structure;

[0049] Figure 6 This is a flowchart of a visual inspection rolling method for electrode tabs in battery modules.

[0050] In the picture:

[0051] 1 is the electrode eye visual inspection rolling box, 2 is the double speed conveyor line, 3 is the tooling pallet belt, 4 is the first side visual inspection component, 5 is the second side visual inspection component, 6 is the first top surface visual inspection component, 7 is the second top surface visual inspection component, 8 is the ring supplementary light source, 9 is the vertical rod, 10 is the image visual acquisition unit, 11 is the electrode eye, 12 is the adjusting crossbar, 13 is the horizontal slide, 14 is the first adjusting seat, 15 is the second adjusting seat, 16 is the rolling roller, 17 is the push motor, 18 is the vertical slide, 19 is the rolling frame, 20 is the roller shaft, 21 is the battery module placement slot, 22 is the thickness visual acquisition unit, 23 is the height adjustment component, and 24 is the crossbar. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described in the accompanying drawings can generally be arranged and designed in various different configurations.

[0053] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0054] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0055] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0056] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0057] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0058] like Figures 1 to 4 As shown, a tab visual inspection rolling system for battery modules includes a tab visual inspection rolling box 1, through which a double-speed conveyor line 2 passes, and a tooling tray belt 3 is placed on the double-speed conveyor line 2. A battery module is placed inside the tooling tray belt 3, and the tabs 11 of the battery module are exposed. The tab visual inspection rolling box 1 is provided with a position adjustment mechanism and a rolling mechanism inside, and a top visual inspection mechanism and a side visual inspection mechanism are provided outside the tab visual inspection rolling box 1.

[0059] The adjusting mechanism is connected to the rolling mechanism, and the adjusting mechanism can adjust the horizontal position and height of the rolling mechanism;

[0060] The rolling mechanism can abut against the tabs 11 of the battery module and can roll and press the tabs 11.

[0061] The top surface visual inspection mechanism is used to collect images of the top of the battery module's tab 11 before and after rolling, and transmit them to the processor;

[0062] The side visual inspection mechanism is used to acquire images of the front and rear sides of the battery module's tab 11 before and after rolling, and transmit them to the processor.

[0063] The purpose of this design is to provide a tab visual inspection rolling system that includes a position adjustment mechanism, a rolling mechanism, a top visual inspection mechanism, and a side visual inspection mechanism. The adjustment mechanism can adjust the horizontal position and height of the rolling mechanism to perform rolling processing on the tabs of different batches of battery modules. After the rolling process, the processing status can be inspected visually. On the one hand, the inspection accuracy is improved compared with the existing manual inspection or sampling inspection, and on the other hand, the workload of manual inspection is greatly reduced.

[0064] In practical use, the adjustment mechanism includes an adjustment crossbar 12, a first adjustment seat 14, and a second adjustment seat 15;

[0065] The adjusting crossbar 12 is provided with a horizontal sliding groove 13;

[0066] The first adjusting seat 14 is mounted on the adjusting crossbar 12 and can move laterally along the horizontal slide groove 13 under the control of the power component;

[0067] The second adjusting seat 15 is disposed on the first adjusting seat 14 and is connected to the rolling mechanism.

[0068] Furthermore, a vertical slide groove 18 is provided on the side of the first adjustment seat 14 facing away from the adjustment crossbar 12, and a push motor 17 is provided on the top of the first adjustment seat 14;

[0069] The second adjustment seat 15 can move up and down along the vertical slide groove 18 under the action of the drive motor 17.

[0070] The purpose of this design is to change the height and horizontal position of the rolling roller by setting up adjusting crossbars, first adjusting seats and second adjusting seats, so that it can fit with the tabs of the battery module to be processed during processing.

[0071] The specific adjustment method is to adjust the position of the first adjusting seat in the horizontal direction through the conduit or motor, so that the first adjusting seat can move laterally along the horizontal slide. After it moves to the appropriate position, the second adjusting seat located on the first adjusting seat is moved up and down along the vertical slide by pushing the motor, thereby adjusting the rolling mechanism located below it.

[0072] In this embodiment, the rolling mechanism includes a rolling roller 16, a rolling frame 19, and a roller shaft 20;

[0073] The rolling frame 19 is connected to the second adjusting seat 15;

[0074] One end of the roller shaft 20 is connected to the rolling roller 16, and the other end passes through the rolling frame 19;

[0075] The rolling roller 16 can abut against the tabs 11 of the battery module and can roll and press the tabs 11.

[0076] The purpose of this design is that when the position of the second adjusting seat is adjusted by the adjusting mechanism, the rolling roller can come into contact with the battery module tabs on the double-speed conveyor line and be squeezed with a certain force to press and roll them. The roller shaft facilitates the rotation of the rolling roller, and the rolling frame supports the entire rolling roller.

[0077] It should be noted that, due to the structure of the entire tooling pallet with 3, as... Figure 5 As shown, the battery module slot 21 is provided with gaps on it. Therefore, the rolling roller also rises and falls intermittently to roll the battery module tabs during the entire working process.

[0078] In this embodiment, the first top surface visual detection component 6 and the second top surface visual detection component 7 each include a horizontal plate, a ring-shaped supplementary light source 8, a vertical rod 9 and an image visual acquisition unit 10.

[0079] The horizontal plate is connected to the electrode visual inspection rolling box 1;

[0080] The annular supplementary light source 8 is located at the bottom of the horizontal plate;

[0081] One end of the vertical rod 9 is connected to the horizontal plate, and the other end is connected to the image visual acquisition unit 10. The vertical rod 9 passes through the ring supplementary light source 8.

[0082] The image visual acquisition unit 10 has its acquisition head facing the high-speed conveyor line 2.

[0083] Meanwhile, the side visual inspection mechanism includes a first side visual inspection component 4 and a second side visual inspection component 5, and is located along the conveying direction of the double-speed conveyor line 2. The first side visual inspection component 4 is located behind the tab visual inspection rolling box 1 and is used to collect the thickness image of the side of the tab 11 of the battery module after rolling. The second side visual inspection component 5 is located in front of the tab visual inspection rolling box 1 and is used to collect the thickness image of the side of the tab 11 of the battery module before rolling.

[0084] The top-level visual inspection component consists of a horizontal plate, a ring-shaped supplementary light source 8, a vertical rod 9, and an image visual acquisition unit 10. In specific application scenarios, the ring-shaped supplementary light source 8 is installed with an LED array surrounding the vertical rod 9, forming coaxial incident illumination. The light is projected evenly onto the tab surface at an angle of 15°-30°, eliminating interference from metal reflections. This solves the shadow occlusion problem caused by traditional side lighting, ensuring that defects such as wrinkles and pits present high-contrast features in the image. At the same time, the image visual acquisition unit 10 is suspended from the center of the ring-shaped light source by the vertical rod 9, achieving accurate imaging. The structure of the vertical rod passing through the ring-shaped light source avoids mechanical obstruction, ensures full field of view coverage, and has better resistance to vibration and displacement.

[0085] Furthermore, both the first side visual detection component 4 and the second side visual detection component 5 include a height adjustment component 23, a crossbar 24, and a thickness visual acquisition unit 22.

[0086] The height adjustment component 23 is connected to the side wall of the electrode visual inspection rolling box 1;

[0087] The crossbar 24 is mounted on the height adjustment component 23 and is aligned with the conveying direction along the double-speed conveyor line 2.

[0088] The thickness visual acquisition unit 22 is mounted on the crossbar 24, with the acquisition head facing the tooling tray belt 3.

[0089] The purpose of this design is to detect the quality of rolling from two dimensions by setting up a first top surface visual inspection component and a second top surface visual inspection component, a first side surface visual inspection component and a second side surface visual inspection component, so as to achieve a comprehensive evaluation of the thickness uniformity of defect types and reduce the misjudgment rate.

[0090] In practical use, the thickness visual acquisition unit 22 integrates a laser emitter and a high-resolution CMOS receiver. The laser beam is projected onto the side of the tab 11 to receive the displacement of the reflected light spot. Meanwhile, the height adjustment component 23 can be a servo motor driven worm gear mechanism to realize vertical stroke adjustment to adapt to tabs of different thicknesses. The crossbar 24 is arranged along the direction of the double speed conveyor line 2, and its length covers the full width of the 600mm tab, supporting the installation of multiple thickness visual acquisition units 22 and eliminating the blind spots of traditional single-point measurement.

[0091] In this embodiment, eight thickness visual acquisition units 22 are arranged at equal intervals on the crossbar 24 to synchronously acquire data at a frequency of 1kHz, achieving 100% coverage in the tab width direction. The processor stitches the eight sets of thickness data into a continuous thickness cloud map to locate "edge thickening".

[0092] like Figure 6As shown, this embodiment provides a visual inspection and rolling system for battery module tabs, and also a visual inspection and rolling method for battery module tabs, including the following steps:

[0093] Image synchronous acquisition and preprocessing: The first top surface visual detection component 6 and the second top surface visual detection component 7 respectively acquire the surface highlight images of the electrode 11 after processing by the electrode visual detection rolling box 1 and before processing; the first side visual detection component 4 and the second side visual detection component 5 respectively acquire the edge contour and thickness images of the electrode 11 after processing by the electrode visual detection rolling box 1 and before processing.

[0094] The processor extracts features from the highlight image on the surface of the tab 11 and determines defects.

[0095] The processor measures the thickness in the edge contour and thickness image of the tab 11 and detects the thickness uniformity.

[0096] The test data is integrated and the test results are fed back.

[0097] Meanwhile, the processor uses a local binary method to extract surface texture features from the surface highlight image of the electrode 11 and identifies abnormal regions through a segmentation network;

[0098] The processor extracts the edge contour and thickness image of the tab 11 from both sides, calculates the vertical pixel distance, obtains the actual thickness, and judges the thickness uniformity.

[0099] The purpose of this design is that the first top-side visual inspection component 6 acquires the highlight image of the tab surface after rolling, the second top-side visual inspection component 7 acquires the image before rolling, the first side-side visual inspection component 4 acquires the thickness data after rolling, and the second side-side visual inspection component 5 acquires the data before rolling. The entropy distribution of the LBP feature map is calculated, and regions with abrupt entropy changes are marked as suspected defects. At the same time, the U-Net segmentation network outputs a defect mask, and the classifier distinguishes between wrinkles, scratches, and cracks. For wrinkle area and microcrack length, decision thresholds need to be set according to process requirements, and judgments and alarms are performed.

[0100] In specific application scenarios, the top image analysis part uses Local Binary Pattern (LBP) to extract surface texture features, and uses U-Net segmentation network to identify abnormal regions. It should be noted that the training data here includes wrinkle and scratch samples, etc. Since this part is existing technology, it will not be elaborated further.

[0101] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A visual inspection rolling system for battery module tabs, comprising a tab visual inspection rolling box (1), wherein a high-speed conveyor line (2) passes through the tab visual inspection rolling box (1), and a tooling tray belt (3) is placed on the high-speed conveyor line (2), wherein a battery module is placed inside the tooling tray belt (3), and the tabs (11) of the battery module are exposed, characterized in that, The electrode visual inspection rolling box (1) is equipped with a position adjustment mechanism and a rolling mechanism, and the electrode visual inspection rolling box (1) is equipped with a top visual inspection mechanism and a side visual inspection mechanism on the outside. The adjusting mechanism is connected to the rolling mechanism, and the adjusting mechanism can adjust the horizontal position and height of the rolling mechanism; The rolling mechanism can abut against the tabs (11) of the battery module and can roll and press the tabs (11). The top surface visual inspection mechanism is used to collect images of the top of the battery module's tabs (11) before and after rolling, and transmit them to the processor; The side visual inspection mechanism is used to collect images of the front and back sides of the battery module tab (11) before and after rolling, and transmit them to the processor.

2. The electrode tab visual inspection rolling system for battery modules according to claim 1, characterized in that, The adjustment mechanism includes an adjustment crossbar (12), a first adjustment seat (14), and a second adjustment seat (15); The adjusting crossbar (12) is provided with a horizontal sliding groove (13); The first adjusting seat (14) is mounted on the adjusting crossbar (12) and can move laterally along the horizontal slide groove (13) under the control of the power component; The second adjusting seat (15) is located on the first adjusting seat (14) and is connected to the rolling mechanism.

3. The electrode tab visual inspection rolling system for battery modules according to claim 2, characterized in that, The first adjusting seat (14) has a vertical slide groove (18) on the side facing away from the adjusting crossbar (12), and a push motor (17) is provided on the top of the first adjusting seat (14). The second adjustment seat (15) can move up and down along the vertical slide (18) under the action of the drive motor (17).

4. The electrode tab visual inspection rolling system for battery modules according to claim 3, characterized in that, The rolling mechanism includes a rolling roller (16), a rolling frame (19), and a roller shaft (20). The rolling frame (19) is connected to the second adjusting seat (15); One end of the roller shaft (20) is connected to the rolling roller (16), and the other end protrudes from the rolling frame (19); The rolling roller (16) can abut against the tab (11) of the battery module and can roll and press the tab (11).

5. The electrode tab visual inspection rolling system for battery modules according to claim 1, characterized in that, The top surface visual inspection mechanism includes a first top surface visual inspection component (6) and a second top surface visual inspection component (7), and is located along the conveying direction of the double speed conveyor line (2). The first top surface visual inspection component (6) is located behind the tab visual inspection rolling box (1) and is used to collect images of the top of the tab (11) of the battery module after rolling. The second top surface visual inspection component (7) is located in front of the tab visual inspection rolling box (1) and is used to collect images of the top of the tab (11) of the battery module before rolling.

6. The electrode tab visual inspection rolling system for battery modules according to claim 5, characterized in that, The first top surface visual detection component (6) and the second top surface visual detection component (7) each include a horizontal plate, a ring supplementary light source (8), a vertical rod (9) and an image visual acquisition unit (10). The horizontal plate is connected to the polar ear visual inspection rolling box (1); The annular supplementary light source (8) is located at the bottom of the horizontal plate; One end of the vertical rod (9) is connected to the horizontal plate, and the other end is connected to the image visual acquisition unit (10). The vertical rod (9) passes through the ring supplementary light source (8). The image visual acquisition unit (10) has its acquisition head facing the high-speed conveyor line (2).

7. The electrode tab visual inspection rolling system for battery modules according to claim 1, characterized in that, The side visual inspection mechanism includes a first side visual inspection component (4) and a second side visual inspection component (5), and is located along the conveying direction of the double speed conveyor line (2). The first side visual inspection component (4) is located behind the tab visual inspection rolling box (1) and is used to collect the thickness image of the side of the tab (11) of the battery module after rolling. The second side visual inspection component (5) is located in front of the tab visual inspection rolling box (1) and is used to collect the thickness image of the side of the tab (11) of the battery module before rolling.

8. The electrode tab visual inspection rolling system for battery modules according to claim 7, characterized in that, The first side vision detection component (4) and the second side vision detection component (5) each include a height adjustment component (23), a crossbar (24) and a thickness vision acquisition unit (22); The height adjustment component (23) is connected to the side wall of the electrode visual inspection rolling box (1); The crossbar (24) is mounted on the height adjustment component (23) and is aligned with the conveying direction along the double-speed conveyor line (2); The thickness visual acquisition unit (22) is mounted on the crossbar (24) and the acquisition head faces the tooling pallet belt (3).

9. A method for visual inspection and rolling of tabs in battery modules, implemented based on the visual inspection and rolling system for tabs in battery modules as described in any one of claims 5 to 8, characterized in that, Includes the following steps: Image synchronous acquisition and preprocessing: The first top surface visual detection component (6) and the second top surface visual detection component (7) respectively acquire the surface highlight images of the electrode (11) after processing by the electrode visual detection rolling box (1) and before processing. The first side visual detection component (4) and the second side visual detection component (5) respectively acquire the edge contour and thickness images of the electrode (11) after processing by the electrode visual detection rolling box (1) and before processing. The processor extracts features from the highlight image on the surface of the tab (11) and determines the defects; The processor measures the thickness in the edge contour and thickness image of the tab (11) and detects the thickness uniformity; The test data is integrated and the test results are fed back.

10. A method for visual inspection and rolling of tabs in battery modules according to claim 9, characterized in that, The processor extracts surface texture features from the surface highlight image of the tab (11) using a local binary method, and identifies abnormal regions through a segmentation network. The processor extracts the two side boundaries in the edge contour and thickness image of the tab (11), calculates the vertical pixel distance, obtains the actual thickness, and judges the thickness uniformity.

Images