Cylindrical battery cell winding machine

Abstract

The utility model provides a kind of cylindrical cell winding machine, for positive sheet, upper diaphragm, negative sheet, lower diaphragm are sequentially laminated and synchronously wound on roll needle to form winding cell, including unwinding mechanism, winding mechanism, still include sheet wrinkling detection mechanism;The sheet wrinkling detection mechanism includes light source assembly and visual detection component, and the light source assembly with the visual detection component is located the same side of roll needle;The light source assembly is used to project illuminating light to the side surface of winding cell facing the visual detection component, and directional lighting is carried out;The visual detection component is used to collect winding cell surface image and identify whether there is wrinkling defect, and the visual detection component with the winding mechanism is electrically connected, so that the winding mechanism every winding, the visual detection component carries out at least one detection;Can detect sheet wrinkling condition quickly and accurately in winding process, and timely find the cell with quality hidden danger.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to a cylindrical battery cell winding machine. Background Technology

[0002] With the rapid development of the new energy industry, lithium-ion batteries, as efficient and clean energy storage devices, have been widely used in consumer electronics, power tools, electric vehicles, and energy storage systems. As the core component of lithium-ion batteries, the manufacturing quality of the battery cell directly determines the battery's safety, cycle life, and energy density. Therefore, improving the automation level and quality control capabilities in the cell production process has become an important direction for the development of current battery manufacturing technology.

[0003] Cylindrical lithium-ion batteries are among the most common types of lithium-ion batteries on the market. In the production process of cylindrical lithium-ion batteries, the winding process of the cylindrical cell is one of the most critical steps. This process typically involves a winding machine sequentially stacking and simultaneously winding the positive electrode sheet, upper separator, negative electrode sheet, and lower separator onto a winding needle, forming a stacked structure of "positive electrode—separator—negative electrode—separator," ultimately constituting the bare cell (also known as a wound cell, a key intermediate product in lithium-ion battery manufacturing, referring to the cell body that has completed the winding process but has not yet been installed in a casing or encapsulated). The positive electrode sheet is located at the innermost layer, followed by the upper separator, the negative electrode sheet, and the lower separator at the outermost layer. The two separator layers work together to isolate the positive and negative electrodes and prevent short circuits. The entire winding process requires uniform tension of each layer of material, high alignment accuracy, and stable operation to ensure the compactness and consistency of the cell's internal structure.

[0004] However, due to the inherent ductility and flexibility of electrode materials, there is a risk of wrinkling during the actual winding process. This is especially true for electrodes with significant serpentine deviations (i.e., uneven, wavy edges). Uneven stress during winding makes these electrodes highly susceptible to wrinkling, potentially leading to serious quality issues such as short circuits in the battery cell. Furthermore, the location of wrinkles is highly random and often concealed within multiple layers of material within the cell, making them difficult to identify through visual inspection or conventional dimensional checks. This results in a large number of potentially wrinkled cells failing to be removed during production and ultimately entering the market, causing significant safety risks and economic losses for end-users. Utility Model Content

[0005] This invention provides a cylindrical battery cell winding machine that can quickly and accurately detect electrode wrinkling during the winding process of cylindrical battery cells, promptly identify cells with potential quality problems, and improve battery production quality and reliability. The specific solution is as follows:

[0006] A cylindrical battery cell winding machine is used to sequentially stack and synchronously wind a positive electrode sheet, an upper separator, a negative electrode sheet, and a lower separator onto a winding needle to form a wound battery cell. The machine includes an unwinding mechanism, a winding mechanism, and an electrode sheet wrinkling detection mechanism.

[0007] The unwinding mechanism is used to provide and release the positive electrode sheet, upper separator, negative electrode sheet, and lower separator material, and synchronously transport the material to the winding area under controllable tension.

[0008] The winding mechanism is used to rotate and wind the stacked positive electrode, upper diaphragm, negative electrode, and lower diaphragm around the winding needle to form a dense wound cell.

[0009] The electrode wrinkling detection mechanism includes a light source assembly and a vision detection assembly, and the light source assembly and the vision detection assembly are located on the same side of the winding needle;

[0010] The light source assembly is used to project illumination light onto one side surface of the wound cell facing the vision inspection assembly for directional illumination;

[0011] The visual inspection component is used to acquire images of the surface of the wound cell and identify whether there are wrinkling defects. The visual inspection component is electrically connected to the winding mechanism, so that the visual inspection component performs at least one inspection for each turn of the winding mechanism.

[0012] Furthermore, the visual inspection component acquires images of the surface of the wound cell along the radial direction of the wound cell, with each acquisition covering half a turn of the surface area of ​​the wound cell; the visual inspection component performs an inspection once every half turn of the winding mechanism.

[0013] Furthermore, the visual inspection component acquires images of the surface of the wound battery cell along the radial direction of the wound battery cell, with each acquisition covering half a turn of the surface area of ​​the wound battery cell; the visual inspection component performs an inspection once for each turn of the winding mechanism.

[0014] Furthermore, the electrode wrinkling detection mechanism is also provided with an adjustment component; the adjustment component can adjust the position of the visual detection component.

[0015] Furthermore, the adjustment component can control the visual detection component to adjust left and right and / or forward and / or backward and / or up and down.

[0016] Furthermore, the adjustment component can control the visual detection component to adjust left and right, forward and backward, and up and down; the adjustment component includes a first side plate, a second side plate, a third side plate, and a horizontal shaft. The first side plate is fixed on the winding machine, the second side plate is slidably mounted on the first side plate and can move forward and backward on the first side plate; the third side plate is slidably mounted on the second side plate and can move up and down on the second side plate; one end of the horizontal shaft is fixed on the third side plate, and the visual detection component is slidably mounted on the side of the horizontal shaft and can move left and right on the side of the horizontal shaft.

[0017] Furthermore, a first measuring scale and a second measuring scale are respectively provided on the first side plate and the second side plate. The first measuring scale can be used to measure the distance the second side plate moves back and forth, and the second measuring scale can be used to measure the distance the third side plate moves up and down.

[0018] Furthermore, the light source component is a laser strip light source, which can be used to project a thin strip of light onto one side surface of the wound battery cell; the visual inspection component includes a CCD camera and an image processing unit, the CCD camera can be used to acquire images of the surface of the wound battery cell, and the image processing unit can be used to identify whether wrinkling defects exist based on the surface image.

[0019] Furthermore, the number of CCD cameras is three, and the three CCD cameras are evenly distributed along a direction parallel to the axial direction of the wound battery cell, respectively acquiring images of the two sides and the middle surface of the wound battery cell.

[0020] Furthermore, the electrode wrinkling detection mechanism also includes an alarm component, which is electrically connected to the visual detection component and is used to issue an alarm signal when a wrinkling defect is detected.

[0021] The cylindrical cell winding machine provided by this utility model has an electrode wrinkling detection mechanism set on one side of the winding needle. The vision detection component can collect the surface image of the wound cell and identify whether there is a wrinkling defect. The light source component projects illumination light onto the side of the wound cell facing the vision detection component for directional illumination, which can enhance the contrast of the surface morphology and make the local height changes or light band deformation caused by wrinkling recognizable by the vision detection component. Thus, the electrode wrinkling can be detected quickly and accurately during the winding process, and cells with potential quality problems can be identified in time, thereby improving the quality and reliability of battery production.

[0022] In some embodiments, the visual inspection component acquires images of the surface of the wound battery cell along the radial direction of the wound battery cell, and a single acquisition can cover half a turn of the surface area of ​​the wound battery cell, resulting in a larger image acquisition range and better effect; when the visual inspection component performs an inspection once every half turn of the winding mechanism, it can perform comprehensive image acquisition and inspection of the entire surface of the wound battery cell, resulting in higher accuracy.

[0023] In some embodiments, the vision inspection component performs an inspection once for each turn of the winding mechanism. Since the wrinkles on the battery cell electrode are generally long and continuous, it is unlikely that the wrinkles are only present in a certain half-turn. Therefore, when the vision inspection component performs image acquisition, it is not necessary to acquire a complete turn of the wound battery cell surface for each turn. It is only necessary to acquire half a turn of the wound battery cell surface area for each turn to achieve the wrinkle detection effect. This can reduce the inspection cost while achieving accurate detection.

[0024] In some embodiments, the electrode wrinkling detection mechanism is further provided with an adjustment component, which can adjust the position of the visual detection component, further improving the versatility of the electrode wrinkling detection mechanism and enhancing the detection effect.

[0025] In some embodiments, the adjustment assembly includes a first side plate, a second side plate, a third side plate, and a horizontal shaft. The first side plate is fixed on the winding machine. The second side plate is slidably mounted on the first side plate and can move back and forth on the first side plate. The third side plate is slidably mounted on the second side plate and can move up and down on the second side plate. One end of the horizontal shaft is fixed on the third side plate. The vision detection assembly is slidably mounted on the side of the horizontal shaft. Thus, the vision detection assembly can be controlled to adjust in three directions: left-right, front-back, and up-down, through a simple and stable structure. This is not only stable and reliable but also lower in cost.

[0026] In some embodiments, by providing a first measuring scale and a second measuring scale on the first side plate and the second side plate respectively, the distance the second side plate moves back and forth and the distance the third side plate moves up and down can be measured respectively, making the adjustment more precise.

[0027] In some embodiments, the light source component is a laser strip light source, and the generated laser strip light is a cylindrical light source with higher brightness, higher collimation, and stronger resistance to ambient light interference, which can significantly enhance the contrast of surface defects. The vision inspection component includes a CCD camera and an image processing unit. The CCD camera is an industrial vision inspection camera based on charge-coupled device technology, known for its high resolution, high sensitivity, low noise, and good dynamic range. It can clearly capture extremely fine defects such as wrinkles, scratches, stains, or uneven edges on the electrode surface, and can ensure image quality even on high-speed production lines, thereby improving image acquisition quality and inspection results.

[0028] In some embodiments, by using three CCD cameras evenly distributed along a direction parallel to the axial direction of the wound cell to capture images of the two sides and the middle surface of the wound cell respectively, the field of view is more complete, and the surface area along the axial direction of the wound cell can be better covered, resulting in better performance.

[0029] In some embodiments, the alarm component, which is electrically connected to the visual inspection component, can issue an alarm signal when a wrinkling defect is detected, thereby further improving the intelligence level of the electrode wrinkling inspection mechanism. Attached Figure Description

[0030] Figure 1 Schematic diagram of a cylindrical battery cell winding machine Figure 1 .

[0031] Figure 2 Schematic diagram of a cylindrical battery cell winding machine Figure 2 .

[0032] Figure 3 Three-dimensional inspection of electrode wrinkling Figure 1 .

[0033] Figure 4 Three-dimensional inspection of electrode wrinkling Figure 2 .

[0034] Figure 5 Front view of an electrode wrinkling inspection agency.

[0035] Figure 6 Top view of the electrode wrinkling inspection facility.

[0036] The attached figures are labeled as follows: 1 is the wound cell, 11 is the positive electrode sheet, 12 is the upper separator, 13 is the negative electrode sheet, 14 is the lower separator, 2 is the winding needle, 3 is the electrode sheet wrinkling detection mechanism, 31 is the light source assembly, 32 is the vision inspection assembly, 321 is the CCD camera, 33 is the adjustment assembly, 331 is the first side plate, 332 is the second side plate, 333 is the third side plate, 334 is the horizontal axis, 335 is the first measuring scale, and 336 is the second measuring scale. Detailed Implementation

[0037] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. For ease of explanation, the terms "front," "rear," "positive," "negative," "left," "right," "top," "bottom," "upper," "lower," "inner," "outer," and "inner" in this utility model indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model or limitations on the actual orientation of the product or device during production, use, sales, etc. In addition, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Furthermore, in the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," and "composition," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] This utility model provides a cylindrical battery cell winding machine, which can be used for winding cylindrical battery cells. The positive electrode 11, upper separator 12, negative electrode 13, and lower separator 14 are sequentially stacked and synchronously wound onto the winding needle 2 to form a wound battery cell 1. At the same time, the machine can quickly and accurately detect the wrinkling of the electrode during the winding process, promptly identify battery cells with potential quality problems, and improve the quality and reliability of battery production.

[0039] like Figure 1 , Figure 2 The diagram shown is a structural schematic of the cylindrical battery cell winding machine. The cylindrical battery cell winding machine includes an unwinding mechanism, a winding mechanism, and an electrode wrinkling detection mechanism 3. Specifically:

[0040] The unwinding mechanism includes a positive electrode unwinding device, an upper diaphragm unwinding device, a negative electrode unwinding device, and a lower diaphragm unwinding device, which are used to carry and release the positive electrode 11, upper diaphragm 12, negative electrode 13, and lower diaphragm 14 materials, and synchronously transport the materials to the winding area under the control of the tension control system and under controllable tension conditions.

[0041] The winding mechanism is the core structure of the cylindrical battery cell winding machine. The winding needle 2 is driven to rotate by a motor and other driving structures, thereby driving the stacked positive electrode 11, upper diaphragm 12, negative electrode 13 and lower diaphragm 14 to be wound layer by layer to form a dense wound battery cell 1.

[0042] The electrode wrinkling detection mechanism 3 includes a light source assembly 31 and a vision detection assembly 32. The light source assembly 31 and the vision detection assembly 32 are located on the same side of the winding needle 2. For example, they can be located together on the left side of the winding needle 2, or on the right side of the winding needle 2. Of course, they can also be located on the upper side or the lower side, etc. There are no restrictions here.

[0043] The light source assembly 31 is used to project illumination light onto the side surface of the wound cell 1 facing the vision inspection assembly 32 for directional illumination, so as to enhance the contrast of surface morphology and make the local height changes or light band deformation caused by wrinkling be recognized by the vision inspection assembly 32; for example, when the vision inspection assembly 32 is located to the left of the winding needle 2, the light source assembly 31 projects illumination light onto the left side surface of the wound cell 1.

[0044] The visual inspection component 32 is used to acquire images of the surface of the wound cell 1 and identify whether wrinkling defects exist; and the visual inspection component 32 is electrically connected to the winding mechanism, so that the visual inspection component 32 performs at least one inspection for each turn of the winding mechanism, such as one inspection for each turn, or two inspections for each turn (such as one inspection for each half turn, etc.).

[0045] In use, the positive electrode 11, upper separator 12, negative electrode 13, and lower separator 14 are first guided into the center of the winding needle 2. Then, driven by a motor or other drive structure, the winding needle 2 begins to wind, causing the stacked positive electrode 11, upper separator 12, negative electrode 13, and lower separator 14 to be wound layer by layer. During the winding process, the light source assembly 31 projects illumination light onto one side surface of the wound cell 1 for directional illumination. The vision detection assembly 32 is electrically connected to the winding mechanism and collects images of the surface of the wound cell 1 according to a set rhythm (such as once per turn or once per half turn) and identifies whether there are wrinkling defects. If no wrinkling defects are detected in any of the collected surface images of the wound cell 1 during the winding process, it is a qualified cell and can proceed to the next process. Conversely, if a wrinkling defect is detected in even one image, it is determined to be a defective cell and is rejected in the subsequent process.

[0046] The cylindrical cell winding machine with the above structure has an electrode wrinkling detection mechanism 3 set on one side of the winding needle 2. The vision detection component 32 can collect the surface image of the wound cell 1 and identify whether there is a wrinkling defect. The light source component 31 projects illumination light onto the side of the wound cell 1 facing the vision detection component 32 for directional illumination, which can enhance the contrast of the surface morphology and make the local height changes or light band deformation caused by wrinkling visible to the vision detection component 32. Thus, the electrode wrinkling can be detected quickly and accurately during the winding process, and cells with potential quality problems can be found in time, thereby improving the quality and reliability of battery production.

[0047] In some embodiments, the visual inspection component 32 acquires images of the surface of the wound battery cell 1 along the radial direction of the wound battery cell 1, and a single acquisition can cover half a turn of the surface area of ​​the wound battery cell 1; the visual inspection component 32 performs an inspection once every half turn of the winding mechanism, that is, the visual inspection component 32 acquires an image of the surface of the wound battery cell 1 once every half turn of the winding mechanism, the acquisition range is half a turn of the surface area of ​​the wound battery cell 1, and identifies whether there is a wrinkling defect.

[0048] The cylindrical battery cell winding machine with the above structure has a larger image acquisition range and better effect because the vision inspection component 32 performs image acquisition on the surface of the wound battery cell 1 along the radial direction of the wound battery cell 1, and a single acquisition can cover half a turn of the surface area of ​​the wound battery cell 1. When the winding mechanism winds half a turn, the vision inspection component 32 performs an inspection once, which can perform comprehensive image acquisition and inspection on the entire surface of the wound battery cell 1, resulting in higher accuracy.

[0049] In some embodiments, the visual inspection component 32 acquires images of the surface of the wound cell 1 along the radial direction of the wound cell 1, and a single acquisition can cover half a circle of the surface area of ​​the wound cell 1; the visual inspection component 32 performs an inspection once for each turn of the winding mechanism, that is, the visual inspection component 32 acquires an image of the surface of the wound cell 1 once for each turn of the winding mechanism, the acquisition range being half a circle of the surface area of ​​the wound cell 1, and identifies whether there are wrinkling defects.

[0050] The cylindrical cell winding machine with the above structure generally produces long (at least 100 mm, sometimes several hundred mm) wrinkles on the cell electrode sheets, which are continuous and unlikely to appear only in a single half-turn. If wrinkling does occur, the wrinkles will appear continuously over several turns (for example, in a 4690 battery, wrinkles appear continuously over five or six turns). Therefore, when the visual inspection component 32 acquires images, it is not necessary to capture the entire surface of the wound cell 1 for each turn. Capturing only half a turn of the surface area of ​​the wound cell 1 per turn is sufficient to achieve wrinkle detection. This allows for accurate detection while reducing inspection costs.

[0051] In some embodiments, the electrode wrinkling detection mechanism 3 is further provided with an adjustment component 33, which can adjust the position of the visual detection component 32. For example, the position of the visual detection component 32 can be adjusted in the left-right direction (i.e., the axial direction of the wound cell 1 in this embodiment), in the front-back direction (i.e., the radial direction of the wound cell 1 in this embodiment), or in the up-down direction. The adjustable range can include only the adjustment in the left-right, front-back, or up-down directions, or it can include the adjustment in two of the left-right, front-back, and up-down directions. More preferably, it can also include the adjustment in all three directions simultaneously. This is not limited here.

[0052] The cylindrical cell winding machine with the above structure can adjust the position of the vision inspection component 32 by setting the adjustment component 33, which further improves the versatility of the electrode wrinkling inspection mechanism 3 and improves the inspection effect.

[0053] In some embodiments, the adjustment component 33 can control the visual detection component 32 to adjust in three directions: left-right, front-back, and up-down; for example Figures 3 to 6The diagram shows the structure of the electrode wrinkling detection mechanism. The adjustment component 33 includes a first side plate 331, a second side plate 332, a third side plate 333, and a horizontal shaft 334. The first side plate 331 is fixed to the winding machine. The second side plate 332 has a first waist hole along the front-back direction. The first side plate 331 has a first screw adapted to the first waist hole, allowing the first screw to slide on the first waist hole, thereby allowing the second side plate 332 to slide on the first side plate 331 and move back and forth on the first side plate 331. The third side plate 333 has a second waist hole along the vertical direction. The second side plate 332 has a second screw adapted to the second waist hole, allowing the second screw to slide on the second waist hole, thereby allowing the second side plate 332 to slide on the first side plate 331 and move back and forth on the first side plate 331. The third side plate 333 is slidably mounted on the second side plate 332 and can move up and down on the second side plate 332. One end of the horizontal shaft 334 is fixed on the third side plate 333. The visual inspection component 32 is slidably mounted on the side of the horizontal shaft 334 (referring to the surface connecting the two ends of the horizontal shaft 334; in this embodiment, the visual inspection component 32 is slidably mounted on the bottom of the horizontal shaft 334, but it could also be on top of the horizontal shaft 334, or in front of the horizontal shaft 334 near the coiling needle 2, or behind the horizontal shaft 334 away from the coiling needle 2; no limitation is made here). In this embodiment, the visual inspection component 32 is slidably mounted through a dovetail groove structure; of course, other sliding structures could also be used; no limitation is made here.

[0054] The cylindrical battery cell winding machine with the above structure includes an adjustment component 33 comprising a first side plate 331, a second side plate 332, a third side plate 333, and a horizontal shaft 334. The first side plate 331 is fixed on the winding machine. The second side plate 332 is slidably mounted on the first side plate 331 and can move back and forth on the first side plate 331. The third side plate 333 is slidably mounted on the second side plate 332 and can move up and down on the second side plate 332. One end of the horizontal shaft 334 is fixed on the third side plate 333. The vision detection component 32 is slidably mounted on the side of the horizontal shaft 334. Thus, the vision detection component 32 can be adjusted in three directions—left-right, front-back, and up-down—through a simple and stable structure, which is not only stable and reliable but also lower in cost.

[0055] In some embodiments, a first measuring scale 335 is provided on the first side plate 331, which can be used to measure the distance the second side plate 332 moves back and forth; a second measuring scale 336 is provided on the second side plate 332, which can be used to measure the distance the third side plate 333 moves up and down.

[0056] The cylindrical battery cell winding machine with the above structure can measure the distance the second side plate 332 moves back and forth and the distance the third side plate 333 moves up and down by setting a first measuring scale 335 and a second measuring scale 336 on the first side plate 331 and the second side plate 332 respectively, making the adjustment more precise.

[0057] In some embodiments, the light source component 31 is a laser strip light source, which can generate laser strip light and project a thin strip of light onto one side surface of the wound cell 1; the visual inspection component 32 includes a CCD camera 321 and an image processing unit, the CCD camera 321 can be used to acquire images of the surface of the wound cell 1, and the image processing unit can be used to identify whether there are wrinkling defects based on the acquired surface images.

[0058] The cylindrical battery cell winding machine with the above structure uses a laser strip light source component 31. The generated laser strip light is cylindrical and has higher brightness, higher collimation, and stronger resistance to ambient light interference, which can significantly enhance the contrast of surface defects. The vision inspection component 32 includes a CCD camera 321 and an image processing unit. The CCD camera is an industrial vision inspection camera based on charge-coupled device technology. It is known for its high resolution, high sensitivity, low noise, and good dynamic range. It can clearly capture extremely fine defects such as wrinkles, scratches, stains, or uneven edges on the electrode surface. Even on a high-speed production line, it can ensure image quality, improve image acquisition quality, and enhance inspection results.

[0059] In some embodiments, the number of CCD cameras 321 is three, and the three CCD cameras 321 are evenly distributed along a direction parallel to the axial direction of the wound cell 1, respectively acquiring images of the two sides and the middle surface of the wound cell 1.

[0060] The cylindrical battery cell winding machine with the above structure acquires images of the two sides and the middle surface of the winding battery cell 1 by means of the three CCD cameras 321 that are evenly distributed along the direction parallel to the axial direction of the winding battery cell 1. The field of view is more complete and can better cover the entire axial surface area of ​​the winding battery cell 1, resulting in better performance.

[0061] In some embodiments, the electrode wrinkling detection mechanism 3 further includes an alarm component, which is electrically connected to the visual detection component 32 and is used to issue an alarm signal when a wrinkling defect is detected.

[0062] The cylindrical cell winding machine with the above structure can further improve the intelligence level of the electrode wrinkling detection mechanism 3 by issuing an alarm signal when the alarm component, which is electrically connected to the vision detection component 32, detects wrinkling defects.

[0063] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. All equivalent changes made in accordance with the shape, structure and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A cylindrical battery cell winding machine for sequentially stacking and synchronously winding a positive electrode sheet (11), an upper separator (12), a negative electrode sheet (13), and a lower separator (14) onto a winding needle (2) to form a wound battery cell (1), comprising an unwinding mechanism and a winding mechanism, characterized in that, It also includes an electrode wrinkling detection agency (3); The unwinding mechanism is used to provide and release the positive electrode (11), upper diaphragm (12), negative electrode (13), and lower diaphragm (14) materials, and synchronously transport the materials to the winding area under controllable tension. The winding mechanism is used to rotate and wind the stacked positive electrode (11), upper diaphragm (12), negative electrode (13), and lower diaphragm (14) around the winding needle (2) to form a dense wound cell (1); The electrode wrinkling detection mechanism (3) includes a light source assembly (31) and a vision detection assembly (32), and the light source assembly (31) and the vision detection assembly (32) are located on the same side of the winding needle (2); The light source assembly (31) is used to project illumination light onto one side surface of the wound cell (1) facing the vision detection assembly (32) for directional illumination; The visual inspection component (32) is used to acquire images of the surface of the wound cell (1) and identify whether there are wrinkling defects. The visual inspection component (32) is electrically connected to the winding mechanism, so that the visual inspection component (32) performs at least one inspection for each turn of the winding mechanism.

2. The cylindrical battery cell winding machine according to claim 1, characterized in that, The visual inspection component (32) acquires images of the surface of the wound cell (1) along the radial direction of the wound cell (1), and each acquisition covers half a turn of the surface area of ​​the wound cell (1); the visual inspection component (32) performs an inspection once every half turn of the winding mechanism.

3. The cylindrical battery cell winding machine according to claim 1, characterized in that, The visual inspection component (32) performs image acquisition on the surface of the wound cell (1) along the radial direction of the wound cell (1), and each acquisition covers half a circle of the surface area of ​​the wound cell (1); the visual inspection component (32) performs an inspection once for each turn of the winding mechanism.

4. The cylindrical battery cell winding machine according to any one of claims 1-3, characterized in that, The electrode wrinkling detection mechanism (3) is also provided with an adjustment component (33); the adjustment component (33) can adjust the position of the visual detection component (32).

5. The cylindrical battery cell winding machine according to claim 4, characterized in that, The adjustment component (33) can control the visual detection component (32) to adjust left and right and / or front and / or up and down.

6. The cylindrical battery cell winding machine according to claim 5, characterized in that, The adjustment component (33) can control the visual detection component (32) to adjust left and right, front and back, and up and down. The adjustment component (33) includes a first side plate (331), a second side plate (332), a third side plate (333), and a horizontal shaft (334). The first side plate (331) is fixed on the winding machine. The second side plate (332) is slidably mounted on the first side plate (331) and can move back and forth on the first side plate (331). The third side plate (333) is slidably mounted on the second side plate (332) and can move up and down on the second side plate (332). One end of the horizontal shaft (334) is fixed on the third side plate (333). The visual detection component (32) is slidably mounted on the side of the horizontal shaft (334) and can move left and right on the side of the horizontal shaft (334).

7. The cylindrical battery cell winding machine according to claim 6, characterized in that, A first measuring scale (335) and a second measuring scale (336) are respectively provided on the first side plate (331) and the second side plate (332). The first measuring scale (335) can be used to measure the distance that the second side plate (332) moves back and forth, and the second measuring scale (336) can be used to measure the distance that the third side plate (333) moves up and down.

8. The cylindrical battery cell winding machine according to any one of claims 1-3, characterized in that, The light source component (31) is a laser strip light source, which can be used to project a thin strip of light onto one side surface of the wound cell (1); the visual inspection component (32) includes a CCD camera (321) and an image processing unit. The CCD camera (321) can be used to acquire images of the surface of the wound cell (1), and the image processing unit can be used to identify whether there are wrinkling defects based on the surface images.

9. The cylindrical battery cell winding machine according to claim 8, characterized in that, The number of CCD cameras (321) is three, and the three CCD cameras (321) are evenly distributed along a direction parallel to the axis of the wound cell (1) to collect images of the two sides and the middle surface of the wound cell (1) respectively.

10. The cylindrical battery cell winding machine according to any one of claims 1-3, characterized in that, The electrode wrinkling detection mechanism (3) also includes an alarm component, which is electrically connected to the visual detection component (32) and is used to issue an alarm signal when a wrinkling defect is detected.

Images