Pole piece compression roller and pole piece rolling device

Abstract

The utility model discloses a pole piece compression roller and a pole piece rolling device, and relates to the technical field of battery production, the pole piece compression roller comprises a compression roller body and at least two first scale marks; the compression roller body is used for carrying out rolling operation on the battery pole piece; an adhesive tape attaching area arranged in a surrounding mode in the circumferential direction is arranged on the peripheral rolling face of the pressing roller body, and the adhesive tape attaching area is used for attaching a thickening adhesive tape. The first scale line is arranged on the peripheral rolling surface, extends in the axial direction of the compression roller body and penetrates through the adhesive tape attaching area; the at least two first scale marks are arranged at intervals in the circumferential direction of the pressing roller body. According to the scheme, the at least two first scale marks arranged on the compression roller body provide a complete visual positioning reference basis for the attachment operation of the thickened adhesive tape, and an operator can check whether the thickened adhesive tape which is being attached has an axial deviation problem or not by means of the first scale marks entering a visual field range in the attachment process; and the continuous alignment of the thickened adhesive tape in the surrounding and attaching process is realized, so that the attaching precision is improved.

Description

Electrode pressing rollers and electrode pressing devices Technical Field

[0001] This application relates to the field of battery manufacturing technology, specifically to an electrode pressing roller and an electrode pressing device. Background Technology

[0002] Roll forming is a crucial step in battery electrode manufacturing. Its purpose is to compact the active material coating on the battery electrode to optimize its pore structure and conductive network, thereby improving its electrochemical performance. Since battery electrodes typically consist of a coated area with active material and an uncoated foil area (also known as the tab area), and there is a significant thickness difference between the coated and uncoated areas, during the roll forming process, the coated area can fully contact the rollers and undergo significant plastic stretching, while the uncoated foil area, due to its extremely thin thickness, cannot fully contact the rollers and undergoes almost no deformation. After roll forming, because of the large difference in stretching between the coated and uncoated areas, wrinkling easily occurs in the uncoated foil area. This not only damages the appearance of the battery electrode but also adversely affects the cell's capacity, cycle life, and safety performance.

[0003] To address the aforementioned problem of electrode wrinkling, those skilled in the art have attempted to apply adhesive tape to the surface of the pressure roller to compensate for the thickness difference between the coated area and the uncoated foil area. However, this approach resulted in a reduction in the final rolling quality, failing to achieve the intended anti-wrinkling effect. Summary of the Invention

[0004] The main objective of this application is to provide an electrode pressing roller and an electrode pressing device, which aims to solve the technical problem that attaching thickened tape to the electrode pressing roller easily leads to a decrease in the final pressing quality and fails to achieve the purpose of preventing wrinkles.

[0005] To achieve the above objectives, the electrode pressure roller proposed in this application includes:

[0006] The pressure roller body is used to perform a rolling operation on the battery electrode sheet; the outer circumferential rolling surface of the pressure roller body is provided with a tape attaching area, which is arranged around the circumference of the pressure roller body and is used to attach thickened tape.

[0007] At least two first scale lines are provided on the outer peripheral roller surface, the first scale lines extend axially along the roller body and penetrate the tape attachment area; at least two first scale lines are arranged at intervals along the circumferential direction of the roller body.

[0008] The electrode pressure roller provided in this embodiment has at least two first scale lines axially penetrating the tape application area on the outer circumferential roller surface of the roller body, and the at least two first scale lines are distributed at intervals along the circumference of the roller body, thereby providing a complete visual positioning reference for the application of the thickened tape in the tape application area. Specifically, the operator uses one of the first scale lines as the initial reference, aligns the starting position of the thickened tape with the corresponding scale value on the first scale line, and begins to apply it circumferentially. As the application process continues and the roller body rotates relative to the operator, the thickened tape will gradually be applied circumferentially to a new circumferential section. At this time, the first scale line serving as the initial reference will gradually move out of the operator's immediate field of vision, while the other first scale line located in the new circumferential section will gradually enter the operator's field of vision. The operator's field of vision is expanded, allowing them to use the second first scale line within their field of vision as a new reference point to check whether the thickening tape being applied is aligned with the corresponding scale value on the second first scale line. This allows the operator to determine whether the circumferential extension path of the thickening tape is straight and whether there is any axial deviation. Correction can be made promptly if there is a tendency for axial deviation. In other words, using multiple first scale lines overcomes the visual limitations during the application process, achieving continuous alignment of the thickening tape during the wrapping process. This improves the application accuracy and operational efficiency of the thickening tape, ensuring that the thickening tape accurately corresponds to the empty foil area after application. This avoids problems such as reduced rolling quality, failure to achieve anti-wrinkle effect, and reduced cell safety caused by deviations in the application position.

[0009] In one embodiment, the maximum central angle between any two adjacent first scale lines in the circumferential direction of the pressure roller body is no greater than 180°.

[0010] Based on the above settings, it can be ensured that there is always a first scale line for reference within the operator's field of vision throughout the entire application process, thereby achieving uninterrupted connection of the reference benchmark and avoiding positioning interruption caused by the temporary inability to observe the reference benchmark, thus further improving the application position accuracy of the thickened tape on the pressure roller body.

[0011] In one embodiment, the first scale line is a laser-engraved layer on the outer peripheral roller surface, and the color of the first scale line differs from the background color of the outer peripheral roller surface.

[0012] Laser engraving can create physical grooves or color variations on the substrate of the pressure roller, producing permanent marks with contrasting colors against the background of the outer roller surface. This improves the visibility of the first graduation line under different lighting conditions. Furthermore, the high precision of laser engraving results in straight lines and sharp edges on the first graduation line, enhancing the accuracy of visual judgment during alignment operations. In addition, the laser-engraved first graduation line exhibits strong wear resistance, making it less prone to wear and detachment during long-term roller pressing or cleaning, thus maintaining its reliable function as an attachment reference over a long period.

[0013] This application also proposes an electrode rolling device, which includes a base, a guide shaft, and an electrode pressing roller as described above; both ends of the guide shaft are connected to the base, and the pressing roller body of the electrode pressing roller is rotatably connected to the guide shaft.

[0014] Based on the electrode rolling device proposed in this embodiment, the pressure roller body can rotate freely around the guide shaft, thereby allowing the pressure roller body to form rolling contact with the battery electrode during the rolling operation, so as to drive the battery electrode to fully extend. Furthermore, since this electrode rolling device adopts all the technical solutions of the aforementioned electrode pressure roller, it possesses at least all the beneficial effects brought about by the aforementioned electrode pressure roller technical solutions. Specifically, in the application operation before the rolling operation, the operator uses one of the first scale lines as an initial reference benchmark, aligns the starting position of the thickened tape with the corresponding scale value on the first scale line, and begins to apply it circumferentially. As the application process continues and the pressure roller body rotates relative to the object, the thickened tape will gradually be applied circumferentially to a new circumferential section. At this time, the first scale line serving as the initial reference benchmark will gradually move out of the operator's immediate field of vision, while another first scale line located in the new circumferential section will gradually enter the operator's field of vision. Thus, the operator... The operator can use the first scale line that enters the field of vision as a new reference point to check whether the thickening tape being applied is aligned with the corresponding scale value on the first scale line. This allows the operator to determine whether the extension path of the thickening tape in the circumferential direction is straight and whether there is any axial deviation. Correction can be made in time when there is a tendency for axial deviation. In other words, the use of multiple first scale lines overcomes the visual limitations in the application process, achieving continuous alignment of the thickening tape during the wrapping process. This improves the application position accuracy and operational efficiency of the thickening tape, ensuring that the thickening tape accurately corresponds to the empty foil area after application. This avoids problems such as reduced rolling quality, failure to achieve anti-wrinkle effect, and reduced cell safety caused by deviations in the application position.

[0015] In one embodiment, the two ends of the guide shaft are movably connected to the base along the axial direction of the pressure roller body.

[0016] Based on the movable arrangement of the aforementioned guide shaft, the pressure roller body and the thickened tape attached to the pressure roller body have axial adjustment function, which can flexibly adapt to different distributions of battery electrodes, improve the process adaptability and operational flexibility of the electrode rolling device, and keep the correspondence between the thickened tape and the empty foil area at the optimal level, reducing changeover adjustment time and material loss caused by reapplying the thickened tape, thereby improving production continuity and efficiency.

[0017] In one embodiment, the electrode roller pressing device further includes a linear bearing, the outer ring of which is connected to the base, and both ends of the guide shaft are slidably fitted into the inner ring of the linear bearing along the axial direction of the pressing roller body.

[0018] This embodiment uses linear bearings as the guiding mechanism, which can reduce frictional resistance and wear during the movement of the guide shaft relative to the base, thereby improving the smoothness and positional accuracy of the pressure roller body when adjusting its axial position, and helping to extend the service life of related components.

[0019] In one embodiment, the electrode rolling device further includes a locking member; the locking member is movably connected to the base; the locking member is used to abut against the guide shaft to prevent the guide shaft from moving axially.

[0020] Based on the above settings, the axial limit can be conveniently set after the guide shaft and the pressure roller body are adjusted to the correct position along the axial direction, ensuring the positional stability of the pressure roller body during subsequent rolling operations and preventing the pressure roller body from shifting due to external forces such as vibration, thereby further improving the final rolling quality.

[0021] In one embodiment, the electrode rolling device further includes a driving member rotatably connected to the base; the driving member has a first transmission part, the guide shaft has a second transmission part, the first transmission part and the second transmission part are connected in transmission, the first transmission part and the second transmission part constitute a motion conversion mechanism, the motion conversion mechanism is used to convert the rotational motion of the driving member into the linear movement of the guide shaft.

[0022] With the above-mentioned motion conversion method, the operator does not need to directly drive the guide shaft to move axially, but can indirectly drive the guide shaft to move axially by rotating the drive component; on this basis, the drive component can be set in a position that is easy for the operator to operate, thereby improving the convenience of operation.

[0023] In one embodiment, the first transmission part is configured as a transmission gear; the second transmission part is configured as a transmission rack, the transmission rack extending axially along the pressure roller body; the transmission gear meshes with the transmission rack for transmission.

[0024] The gear and rack transmission method has advantages such as high transmission accuracy, sensitive response, compact structure and strong load-bearing capacity. This transmission method can efficiently, accurately and stably convert the rotational motion of the driving component into the axial linear motion of the guide shaft, which is conducive to realizing the rapid and reliable axial adjustment of the pressure roller body.

[0025] In one embodiment, the transmission rack is arranged circumferentially around the guide shaft.

[0026] Based on this structural design, the coverage area of ​​the transmission rack in the circumferential direction can be increased, enabling the transmission gear to effectively mesh with the transmission rack from more angular positions. This enhances the reliability of the meshing transmission between the transmission gear and the transmission rack, avoids the problem of poor meshing caused by the positioning deviation of the guide shaft in the circumferential direction, and is conducive to the uniform distribution of transmission force, improving transmission smoothness and structural durability.

[0027] In one embodiment, the outer periphery of the drive member is provided with a second scale line, which extends circumferentially around the rotation center axis of the transmission gear; the base is provided with a pointer portion, which points to the second scale line;

[0028] During the rotation of the drive component, the pointer is used to align with the corresponding scale value on the second scale line to indicate the amount of rotation of the drive component.

[0029] Based on the above settings, operators can precisely control and quantify the rotation amplitude of the drive components, thereby achieving real-time and precise adjustment of the axial movement distance of the pressure roller body.

[0030] In one embodiment, the second scale line is used to indicate length; the diameter of the envelope circle formed by the second scale line is equal to the pitch circle diameter of the transmission gear.

[0031] Based on the above settings, when the operator adjusts the axial position of the guide shaft by rotating the drive component, they only need to observe the scale value indicated by the pointer on the second scale line to clearly and intuitively obtain the axial movement distance of the guide shaft and the pressure roller body without conversion. This simplifies the operation process and improves the intuitiveness and accuracy of judging the axial position of the pressure roller body.

[0032] In one embodiment, the driving component includes a driving rod and a handheld turntable; the driving rod is rotatably connected to the base, the transmission gear is disposed at one end of the driving rod, the handheld turntable is detachably connected to the other end of the driving rod, and the second scale line is disposed on the outer periphery of the handheld turntable.

[0033] The operator can adjust the axial position of the guide shaft and pressure roller by directly holding and rotating the handheld turntable, which in turn drives the transmission gear through the drive rod. Simultaneously, since the second scale line is located on the handheld turntable, the operator can directly and clearly observe the scale reading on the pointer on the second scale line during the rotation adjustment process. This allows for real-time control of the current axial movement distance of the guide shaft and pressure roller, improving the immediacy and accuracy of displacement feedback. Furthermore, the detachable design of the handheld turntable facilitates subsequent individual maintenance and replacement, thereby enhancing the applicability and application flexibility of the electrode rolling device.

[0034] In one embodiment, the other end of the drive rod is provided with multiple snap-fit ​​structures, which are arranged circumferentially along the drive rod; the hand-held turntable is provided with a mating hole, and the wall of the mating hole is provided with multiple mating structures, which are arranged circumferentially along the mating hole; one of the snap-fit ​​structures and the mating structures is a toothed structure, and the other of the snap-fit ​​structure and the mating structure is a toothed groove structure; the other end of the drive rod passes through the mating hole, and the multiple snap-fit ​​structures and the multiple mating structures are engaged in a one-to-one snap-fit ​​engagement.

[0035] Based on the above-mentioned connection method between the handheld turntable and the drive rod, the handheld turntable and the drive rod can achieve synchronous connection without relative rotation in the circumferential direction, which enables reliable torque transmission between the handheld turntable and the drive rod. At the same time, it realizes quick assembly and disassembly of the handheld turntable and the drive rod, and makes it easier to maintain and replace the handheld turntable separately in the future, thereby improving the applicability and application flexibility of the electrode rolling device.

[0036] In one embodiment, the guide shaft passes through and fits into the pressure roller body at its center;

[0037] The electrode rolling device further includes a clamp structure and a locking device; the locking device is connected to the clamp structure, and the guide shaft passes through the inner ring of the clamp structure; the locking device is used to drive the inner ring of the clamp structure to contract inward, so as to drive the clamp structure to hug the guide shaft.

[0038] The clamp structure is used to abut against the end of the pressure roller body to prevent the pressure roller body from moving axially relative to the guide shaft.

[0039] After the pressure roller body moves axially into position on the guide shaft, the operator can abut the two clamp structures against the two end faces of the pressure roller body respectively, and then drive the inner ring of the clamp structure to retract inward through the locking fastener, so that the inner ring of the clamp structure tightly hugs the outer circumference of the guide shaft, thereby achieving relative fixation between the clamp structure and the guide shaft; in this way, the clamp structure fixed on the guide shaft will prevent the pressure roller body from moving axially relative to the guide shaft, that is, conveniently achieve axial limiting of the pressure roller body, thereby ensuring the positional stability of the pressure roller body during subsequent rolling operations. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0041] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the electrode rolling device of this application;

[0042] Figure 2 is a top view of an embodiment of the electrode rolling device of this application;

[0043] Figure 3 is a schematic diagram of the actual attachment of an embodiment of the electrode roller of this application;

[0044] Figure 4 is a partial internal structure schematic diagram of an embodiment of the electrode rolling device of this application;

[0045] Figure 5 is a partial structural schematic diagram of an embodiment of the electrode rolling device of this application.

[0046] Explanation of icon numbers:

[0047] 100. Thickened adhesive tape;

[0048] 1. Pressure roller body; 11. Outer peripheral roller pressing surface; 111. Tape attaching area;

[0049] 2. First scale mark;

[0050] 3. Base; 31. First base body; 32. Second base body; 33. Pointer section;

[0051] 4. Guide shaft; 41. Second transmission unit; 411. Transmission rack;

[0052] 5. Linear bearings;

[0053] 6. Driving component; 61. First transmission part; 62. Second scale line; 63. Driving rod; 64. Hand-held turntable; 611. Transmission gear; 631. Snap-fit ​​structure;

[0054] 7. Clamp structure.

[0055] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0057] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0058] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0059] Roll forming is a crucial step in battery electrode manufacturing. Its purpose is to compact the active material coating on the battery electrode to optimize its pore structure and conductive network, thereby improving its electrochemical performance. Since battery electrodes typically consist of a coated area with active material and an uncoated foil area (also known as the tab area), and there is a significant thickness difference between the coated and uncoated areas, during the roll forming process, the coated area can fully contact the rollers and undergo significant plastic stretching, while the uncoated foil area, due to its extremely thin thickness, cannot fully contact the rollers and undergoes almost no deformation. After roll forming, because of the large difference in stretching between the coated and uncoated areas, wrinkling easily occurs in the uncoated foil area. This not only damages the appearance of the battery electrode but also adversely affects the cell's capacity, cycle life, and safety performance.

[0060] To address the aforementioned wrinkling problem, those skilled in the art have attempted to apply adhesive tape to the surface of the pressure roller to compensate for the thickness difference between the coated area and the uncoated foil area. However, this approach resulted in a reduction in the final rolling quality, failing to achieve the intended anti-wrinkling effect.

[0061] Based on the above problems, after further analysis, the researchers of this application found that the current specific solution to the problem of electrode wrinkling is to pre-apply adhesive tape to the position corresponding to the empty foil area on the surface of the pressure roller, so as to thicken the local area of ​​the pressure roller surface. In this way, during the subsequent rolling process, when the part of the pressure roller surface without adhesive tape is in full contact with the coating area, it can simultaneously ensure that the adhesive tape is in full contact with the empty foil area, thereby reducing the difference in elongation between the empty foil area and the coating area, and effectively suppressing or eliminating the wrinkling problem in the empty foil area.

[0062] However, the tape application process described above requires manual operation. The specific application position and tape direction often rely on indirect measurements and the operator's experience, lacking clear and highly visible reference benchmarks. This makes it easy for the tape to deviate from the preset application area during the application process, making it difficult to ensure that the tape accurately corresponds to the empty foil area after application. As a result, the final rolling quality may be reduced due to the deviation in the application position, failing to achieve the desired anti-wrinkling purpose. It may even cause new cell safety issues due to the tape intruding into the coating area.

[0063] In view of the above problems, this application provides an electrode pressure roller with scale lines added to the roller body. The scale lines can be used as a reference point in the tape application process, thereby improving the accuracy of the tape application position.

[0064] Please refer to Figures 1 to 3. The electrode pressing roller provided in this application embodiment includes a pressing roller body 1 and at least two first scale lines 2: the pressing roller body 1 is used to perform a pressing operation on the battery electrode; the outer peripheral pressing surface 11 of the pressing roller body 1 is provided with a tape attaching area 111, the tape attaching area 111 is arranged around the circumference of the pressing roller body 1, and the tape attaching area 111 is used to attach thickened tape 100; the first scale lines 2 are arranged on the outer peripheral pressing surface 11, the first scale lines 2 extend along the axial direction of the pressing roller body 1 and pass through the tape attaching area 111; at least two first scale lines 2 are arranged at intervals along the circumference of the pressing roller body 1.

[0065] In this embodiment, the pressure roller body 1 is a cylindrical component, and the pressure roller body 1 constitutes the working part that applies pressure to the battery electrode in the rolling equipment; the outer cylindrical surface of the pressure roller body 1 is the working surface that directly contacts the battery electrode, and is called the outer peripheral rolling surface 11.

[0066] An annular region extending continuously along the circumference of the pressure roller body 1 is provided on the outer peripheral roller pressing surface 11. This annular region is defined as the tape attaching area 111. The tape attaching area 111 is used to attach a thickened tape 100 with a specific thickness and surface characteristics, such as Teflon tape. When the thickened tape 100 is attached to the tape attaching area 111 around the circumference of the pressure roller body 1, the area on the outer peripheral roller surface with the thickened tape 100 attached forms a radially outward protruding flange structure relative to the area on the outer peripheral roller pressing surface 11 without the thickened tape 100 attached. During the subsequent rolling process, the flange structure formed by the thickened tape 100 will contact the empty foil area of ​​the battery electrode, while the area on the outer peripheral rolling surface 11 where the thickened tape 100 is not attached will contact the coating area of ​​the battery electrode. This can compensate for the thickness difference between the empty foil area and the coating area, reduce the difference in elongation between the empty foil area and the coating area during the rolling process, and thus achieve the purpose of suppressing wrinkling in the empty foil area.

[0067] To achieve precise circumferential application of the thickened tape 100 within the tape application area 111, this embodiment provides at least two first scale lines 2 on the outer peripheral roller surface 11. Each first scale line 2 is a linear mark extending axially along the roller body 1, and a series of continuous scale values ​​are provided along its extension direction. Each first scale line 2 axially penetrates the entire tape application area 111; specifically, the extension path of each first scale line 2 completely covers the entire axial width of the tape application area 111. This ensures that when the operator applies the thickened tape 100 at any axial position within the tape application area 111, the operator can select a corresponding scale value on the first scale line 2 as a reference, then align the thickened tape 100 with that scale value and apply it to the outer peripheral roller surface 11.

[0068] Furthermore, at least two first scale lines 2 are provided on the outer peripheral roller pressing surface 11, and the at least two first scale lines 2 are distributed at intervals along the circumference of the roller body 1. Based on this arrangement, it can be used to solve the problem of interruption of the visibility of the reference reference due to the limitation of the viewing angle when performing circumferential attachment on the outer peripheral roller pressing surface 11. Specifically, during the process of the operator attaching the thickened tape 100 around the roller body 1, due to the limitation of the cylindrical geometry, the operator's fixed viewpoint cannot simultaneously cover the entire outer peripheral roller pressing surface 11; assuming that the operator uses a first scale line 2 directly in front as the initial reference reference, aligns the starting position of the thickened tape 100 with the corresponding scale value on the first scale line 2, and begins to attach it circumferentially; as the attachment process progresses and the roller body 1 rotates relative to each other, the first scale line 2 used as the initial reference reference will gradually move out of the operator's immediate field of vision; and as shown in Figure 3, by In this embodiment, at least two first scale lines 2 are provided at circumferential intervals along the pressure roller body 1. Therefore, when the thickened tape 100 is attached to a new circumferential section, another first scale line 2 located in the circumferential section will enter the operator's field of vision. Thus, the operator can use the first scale line 2 as a new reference benchmark to check whether the thickened tape 100 being attached is aligned with the corresponding scale value on the first scale line 2. This allows the operator to determine whether the extension path of the thickened tape 100 in the circumferential direction is straight and whether there is any axial deviation problem, and to correct it in time when there is a tendency for axial deviation.

[0069] Based on the above settings, multiple first scale lines 2 distributed along the circumference can be used as reference benchmarks for different circumferential sections on the pressure roller body 1, so as to assist the operator in achieving continuous visual alignment and attachment path control throughout the process of wrapping the thickened tape 100, and to prevent the thickened tape 100 from skewing or deviating from the preset attachment path along the axial direction during the circumferential attachment process.

[0070] The first scale line 2 can be formed on the outer circumferential roller surface 11 of the pressure roller body 1 using processes such as mechanical engraving, chemical etching, or coating. The specific circumferential spacing angle of the first scale line 2 can be designed according to the requirements for reference line density during actual application and the dimensions of the pressure roller body 1. Specifically, two first scale lines 2 can be set, with the two first scale lines 2 positioned opposite each other in the circumferential direction of the pressure roller body 1; three first scale lines 2 can also be set, with the three first scale lines 2 evenly distributed in the circumferential direction of the pressure roller body 1; and a greater number of first scale lines 2 can be set according to actual needs, which is not limited here.

[0071] Therefore, the electrode pressure roller provided in this embodiment has at least two first scale lines 2 axially penetrating the tape application area 111 on the outer circumferential roller pressing surface 11 of the pressure roller body 1, and the at least two first scale lines 2 are distributed circumferentially along the pressure roller body 1, thereby providing a complete visual positioning reference for the application operation of the thickened tape 100 in the tape application area 111. Specifically, as shown in Figure 3, the operator uses one of the first scale lines 2 as the initial reference, aligns the starting position of the thickened tape 100 with the corresponding scale value on the first scale line 2, and begins to apply it circumferentially. As the application process continues and the pressure roller body 1 rotates relative to each other, the thickened tape 100 will gradually be applied circumferentially to a new circumferential section. At this time, the first scale line 2, which serves as the initial reference, will gradually move out of the operator's immediate field of vision, while the other first scale line 2 located in the new circumferential section will be applied circumferentially. As the second graduation line 2 gradually enters the operator's field of vision, the operator can use this second graduation line 2 as a new reference benchmark to check whether the thickened tape 100 being applied is aligned with the corresponding graduation value on the second graduation line 2. This allows the operator to determine whether the circumferential extension path of the thickened tape 100 is straight and whether there is any axial deviation. Correction can be made in time if there is a tendency for axial deviation. In other words, the use of multiple first graduation lines 2 overcomes the visual limitations during the application process, achieving continuous alignment of the thickened tape 100 during the circumferential application process. This improves the application position accuracy and operational efficiency of the thickened tape 100, ensuring that the thickened tape 100 accurately corresponds to the empty foil area after application. This avoids problems such as reduced rolling quality, failure to achieve anti-wrinkle effect, and reduced cell safety caused by deviations in the application position.

[0072] In one embodiment, referring to Figures 1 to 3, the maximum central angle between any two adjacent first scale lines 2 in the circumferential direction of the pressure roller body 1 is no greater than 180°.

[0073] During the application of the thickening tape 100, when the operator is looking directly at the outer circumferential roller surface 11 of the pressure roller body 1, due to the physiological limitations of the human field of vision and the physical obstruction of the equipment structure, the central angle corresponding to the circumferential section of the outer circumferential roller surface 11 that the operator can observe does not exceed 180°. Based on this limitation, this embodiment sets the maximum central angle between any two adjacent first scale lines 2 to no more than 180°. This ensures that at any moment when the operator is applying the thickening tape 100, there is at least one first scale line 2 within the operator's current field of vision that can serve as an application reference.

[0074] For ease of understanding, we will now take a specific implementation method with two first scale lines 2 and a central angle of 180° between the two first scale lines 2 as an example for explanation. When the operator begins to apply the adhesive tape, one of the first scale lines 2 can be used as the initial reference. As the pressure roller body 1 continues to rotate, the thickened tape 100 is continuously applied to the outer circumferential roller pressing surface 11. The first scale line 2, which serves as the initial reference, will gradually move out of the operator's field of vision. Since the operator's maximum field of vision is 180° and the central angle between the two first scale lines 2 is 180°, when one of the first scale lines 2, which serves as the initial reference, completely moves out of the operator's field of vision, the other first scale line 2 will simultaneously enter the operator's field of vision. This ensures that there is always a first scale line 2 available for reference within the operator's field of vision throughout the entire application process, thereby achieving uninterrupted connection of the reference and avoiding positioning interruptions caused by the temporary inability to observe the reference. This further improves the application position accuracy of the thickened tape 100 on the pressure roller body 1.

[0075] Based on the above principle, it also applies to situations where more first graduation lines 2 are set. For example, when three first graduation lines 2 are evenly distributed circumferentially on the outer peripheral roller pressing surface 11, the central angle between any two adjacent first graduation lines 2 is 120°; when four first graduation lines 2 are evenly distributed circumferentially on the outer peripheral roller pressing surface 11, the central angle between any two adjacent first graduation lines 2 is 90°. It can be understood that as the number of first graduation lines 2 increases, a denser attachment reference base can be provided, allowing operators to more conveniently use adjacent first graduation lines 2 to correct the real-time attachment path of the thickened tape 100 in any circumferential section on the outer peripheral roller pressing surface 11.

[0076] In one embodiment, referring to Figures 1 to 3, the first scale line 2 is a laser-engraved layer on the outer peripheral roller pressing surface 11, and the color of the first scale line 2 is different from the background color of the outer peripheral roller pressing surface 11.

[0077] In this embodiment, laser engraving can create physical grooves or color variations on the substrate of the pressure roller body 1, thereby producing permanent marks with contrasting differences from the background color of the outer peripheral roller pressing surface 11, which can improve the visibility of the first scale line 2 under different lighting conditions. Furthermore, the laser engraving process has high processing precision, enabling the formation of straight lines and clear edges on the first scale line 2, which is beneficial for improving the visual judgment accuracy when using the first scale line 2 for alignment during the bonding process. In addition, the first scale line 2 formed by the laser engraving process has strong wear resistance and is not easily worn off during long-term roller pressing operations or cleaning, thus maintaining its reliable function as a bonding reference for a long time.

[0078] This application embodiment also provides an electrode rolling device. Please refer to Figures 1 to 3. The electrode rolling device includes a base 3, a guide shaft 4, and an electrode pressing roller as described in any of the above embodiments. Both ends of the guide shaft 4 are connected to the base 3, and the pressing roller body 1 of the electrode pressing roller is rotatably connected to the guide shaft 4.

[0079] In this embodiment, the base 3 is used to provide support and mounting foundation for the entire electrode rolling device. In a specific embodiment, as shown in FIG1, the base 3 may include a first seat 31 and a second seat 32 arranged axially at intervals along the pressure roller body 1, and the first seat 31 and the second seat 32 together constitute the support frame of the electrode rolling device.

[0080] The guide shaft 4 can extend horizontally, and its two ends can be connected to the first seat 31 and the second seat 32, respectively. The pressure roller body 1 can be rotatably connected to the middle region of the guide shaft 4 through rotatable connecting components such as bearings and bushings. In this way, the pressure roller body 1 can rotate freely around the guide shaft 4, thereby forming rolling contact with the battery electrode during the rolling operation to drive the battery electrode to fully extend.

[0081] For other specific structures of the electrode pressing roller, please refer to the above embodiments. Since the electrode pressing device in this embodiment adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments. That is, at least two axially penetrating first scale lines 2 are provided on the outer circumferential pressing surface 11 of the pressing roller body 1, and the at least two first scale lines 2 are distributed at intervals along the circumference of the pressing roller body 1, thereby providing a complete visual positioning reference for the application of the thickened tape 100 in the tape application area 111. Specifically, the operator uses one of the first scale lines 2 as the initial reference, aligns the starting position of the thickened tape 100 with the corresponding scale value on the first scale line 2, and begins to apply it circumferentially. As the application process continues and the pressing roller body 1 rotates relative to the roller, the thickened tape 100 will gradually be applied circumferentially to a new circumferential section. At this time, the first scale line 2, which serves as the initial reference, will gradually move out of the operator's field of vision. As the operator's field of vision expands, another first scale line 2 located in the new circumferential section will gradually enter the operator's field of vision. The operator can then use this first scale line 2, which enters the field of vision, as a new reference point to check whether the thickened tape 100 being applied is aligned with the corresponding scale value on the first scale line 2. This allows the operator to determine whether the extension path of the thickened tape 100 in the circumferential direction is straight and whether there is any axial deviation. Correction can be made in time if there is a tendency for axial deviation. In other words, the use of multiple first scale lines 2 overcomes the visual limitations during the application process, achieving continuous alignment of the thickened tape 100 during the circumferential application process. This improves the application position accuracy and operational efficiency of the thickened tape 100, ensuring that the thickened tape 100 accurately corresponds to the empty foil area after application. This avoids problems such as reduced rolling quality, failure to achieve anti-wrinkle effect, and reduced cell safety caused by deviations in the application position.

[0082] In one embodiment, referring to Figures 1 and 2, the two ends of the guide shaft 4 are movably connected to the base 3 along the axial direction of the pressure roller body 1.

[0083] Specifically, a linear guide mechanism, such as a guide rail slider assembly, can be installed on the base 3, and the two ends of the guide shaft 4 can be connected to the movable end of the linear guide mechanism, thereby enabling the guide shaft 4 to move stably in a straight line relative to the base 3 in the axial direction.

[0084] Based on the above settings, the pressure roller body 1 has the ability to adjust its position in the axial direction. Specifically, in actual production scenarios, the axial position of the battery electrode in the rolling equipment may change due to reasons such as equipment material positioning, battery electrode specification switching, and process parameter optimization. Based on the axial adjustment function of the pressure roller body 1 in this embodiment, the operator can conveniently drive the guide shaft 4 to move axially relative to the base 3 without having to peel off the already applied thickened tape 100 from the pressure roller body 1. This causes the entire pressure roller body 1 to move axially, thereby realigning the thickened tape 100 already applied on the pressure roller body 1 with the actual empty foil area of ​​the current batch of battery electrodes.

[0085] Therefore, based on the movable arrangement of the guide shaft 4 in this embodiment, the pressure roller body 1 and the thickened tape 100 attached to the pressure roller body 1 have axial adjustment function, which can flexibly adapt to different distributions of battery electrodes, improve the process adaptability and operational flexibility of the electrode rolling device, and keep the correspondence between the thickened tape 100 and the empty foil area at the optimal level, reducing the changeover adjustment time and the material loss caused by reapplying the thickened tape 100, and improving production continuity and efficiency.

[0086] In one embodiment, referring to Figures 1 and 2, the electrode roller pressing device further includes a linear bearing 5, the outer ring of which is connected to the base 3, and the two ends of the guide shaft 4 are slidably fitted in the inner ring of the linear bearing 5 along the axial direction of the pressing roller body 1.

[0087] Specifically, as shown in Figure 2, two linear bearings 5 ​​can be configured, and the outer rings of the two linear bearings 5 ​​can be fixedly installed on the first housing 31 and the second housing 32 respectively; one end of the guide shaft 4 is slidably fitted in the inner ring of one of the linear bearings 5, and the other end of the guide shaft 4 is slidably fitted in the inner ring of the other linear bearing 5.

[0088] In this embodiment, a linear bearing 5 is used as a guiding mechanism, which can reduce the frictional resistance and wear of the guide shaft 4 during the movement of the base 3, thereby improving the smoothness and positional accuracy of the pressure roller body 1 when adjusting its axial position, and helping to extend the service life of related components.

[0089] In one embodiment, referring to Figures 1 and 2, the electrode rolling device further includes a locking member (not shown in the figures); the locking member is movably connected to the base 3; the locking member is used to abut against the guide shaft 4 to prevent the guide shaft 4 from moving axially.

[0090] In this embodiment, the locking element can be configured as a locking pin, a set screw, an eccentric wheel, or other structures; the locking element can be movably connected to the base 3 based on a sliding fit, a rotational fit, or other combined motion forms; at least a portion of the structure on the locking element can move closer to or further away from a predetermined portion of the guide shaft 4 as the locking element moves relative to the base 3, thereby utilizing the abutting fit between this portion of the structure on the locking element and the guide shaft 4 to impede the axial movement of the guide shaft 4.

[0091] Specifically, taking a locking pin as an example, a pin hole can be provided on the base 3, and the locking pin is inserted into the pin hole. The sliding direction of the locking pin in the pin hole is perpendicular to the moving direction of the guide shaft 4 relative to the base 3. After the axial position of the guide shaft 4 is adjusted, the locking pin can be driven to approach the guide shaft 4, so that one end of the locking pin abuts against the surface of the guide shaft 4 or is inserted into the corresponding positioning hole or positioning groove on the guide shaft 4, thereby restricting the degree of freedom of movement of the guide shaft 4 along its axial direction and realizing reliable locking of the guide shaft 4.

[0092] Based on the above settings, the axial limit can be conveniently set after the guide shaft 4 and the pressure roller body 1 are adjusted to the correct position along the axial direction, ensuring the positional stability of the pressure roller body 1 during the subsequent rolling operation and preventing the pressure roller body 1 from shifting due to external forces such as vibration, thereby further improving the final rolling quality.

[0093] In one embodiment, referring to FIG4, the electrode rolling device further includes a driving member 6, which is rotatably connected to the base 3; the driving member 6 has a first transmission part 61, and the guide shaft 4 has a second transmission part 41. The first transmission part 61 and the second transmission part 41 are connected in a transmission manner, and the first transmission part 61 and the second transmission part 41 constitute a motion conversion mechanism, which is used to convert the rotational motion of the driving member 6 into the linear movement of the guide shaft 4.

[0094] In this embodiment, based on the transmission cooperation between the first transmission unit 61 and the second transmission unit 41, when the operator drives the driving member 6 to rotate relative to the base 3, the rotational motion of the driving member 6 can be converted into the linear motion of the guide shaft 4 along the axial direction, thereby driving the guide shaft 4 and the pressure roller body 1 to achieve axial position adjustment. Through the above motion conversion method, the operator does not need to directly drive the guide shaft 4 to move axially, but can indirectly drive the guide shaft 4 to move axially by rotating the driving member 6; on this basis, the driving member 6 can be set in a position that is convenient for the operator to operate, thereby improving the convenience of operation.

[0095] Specifically, the motion conversion mechanism formed by the first transmission part 61 and the second transmission part 41 may include a screw mechanism, a ball screw mechanism, a gear and rack mechanism, etc., which can all realize the function of converting the rotational motion of the first transmission part 61 into the linear motion of the second transmission part 41. In actual application, the selection can be made according to the spatial layout requirements, transmission requirements, etc., and no limitation is made here.

[0096] In one embodiment, referring to FIG4, the first transmission part 61 is configured as a transmission gear 611; the second transmission part 41 is configured as a transmission rack 411, which extends along the axial direction of the pressure roller body 1; the transmission gear 611 meshes with the transmission rack 411 for transmission.

[0097] In this embodiment, when the operator drives the drive component 6 to rotate, thereby causing the transmission gear 611 to rotate, the rotational motion of the drive component 6 can be precisely converted into the linear motion of the guide shaft 4 along its axial direction through the meshing action between the transmission gear 611 and the transmission rack 411.

[0098] The gear and rack transmission method has advantages such as high transmission accuracy, sensitive response, compact structure and strong load-bearing capacity. This transmission method can efficiently, accurately and stably convert the rotational motion of the drive component 6 into the axial linear motion of the guide shaft 4, which is conducive to realizing the rapid and reliable axial adjustment of the pressure roller body 1.

[0099] In one embodiment, referring to FIG4, the transmission rack 411 is arranged circumferentially around the guide shaft 4.

[0100] In this embodiment, the teeth of the transmission rack 411 are continuously distributed circumferentially on the outer circumferential surface of the guide shaft 4, thereby forming an annular rack structure as shown in Figure 4. Based on this structural design, the circumferential coverage of the transmission rack 411 can be increased, allowing the transmission gear 611 to effectively mesh with the transmission rack 411 from more angular positions. This enhances the reliability of the meshing transmission between the transmission gear 611 and the transmission rack 411, avoids the problem of poor meshing caused by the positioning deviation of the guide shaft 4 in the circumferential direction, and is conducive to the uniform distribution of transmission force, improving transmission smoothness and structural durability.

[0101] In one embodiment, referring to Figures 4 and 5, the outer periphery of the drive member 6 is provided with a second scale line 62, which extends circumferentially around the rotation center axis of the transmission gear 611; the base 3 is provided with a pointer part 33, which points to the second scale line 62.

[0102] During the rotation of the drive unit 6, the pointer part 33 is used to align with the corresponding scale value on the second scale line 62 to indicate the amount of rotation of the drive unit 6.

[0103] Specifically, the second scale line 62 is a linear mark extending circumferentially from the drive member 6, and a series of continuous scale values ​​are set on the second scale line 62 along its extension direction. During the rotation of the drive member 6 and the transmission gear 611, the second scale line 62 rotates coaxially with the transmission gear 611, while the pointer 33 points to the second scale line 62 and remains stationary. By observing the specific scale value on the second scale line 62 aligned with by the pointer 33, the operator can intuitively read the rotation amount of the drive member 6, and thus determine the current axial movement distance of the guide shaft 4 based on the real-time rotation amount of the drive member 6.

[0104] The scale value of the second scale line 62 can be set to length, angle, etc., that is, the second scale line 62 can be used to mark the rotation distance, rotation angle, and other parameters used to characterize the amount of rotation of the drive component 6. Based on the setting position of the second scale line 62, the coupling relationship between the transmission gear 611 and the transmission rack 411, the operator can directly obtain or calculate the axial movement distance of the guide shaft 4 through the rotation amount read from the second scale line 62.

[0105] Based on the above settings, the operator can precisely control and quantify the rotation amplitude of the drive component 6, thereby achieving real-time and precise adjustment of the axial movement distance of the pressure roller body 1.

[0106] In one embodiment, referring to Figures 4 and 5, the second scale line 62 is used to indicate length; the diameter of the envelope circle formed by the second scale line 62 is equal to the pitch circle diameter of the transmission gear 611.

[0107] In this embodiment, the scale value of the second scale line 62 is used to directly indicate the unit of length, such as millimeters (mm) and centimeters (cm). The pointer 33 should point to the zero position of the second scale line 62 in the initial state; after the driving member 6 rotates a certain angle, the reading on the second scale line 62 indicated by the pointer 33 is the length value of the corresponding arc length on the circumference of the second scale line 62 (i.e., the envelope circle formed by the second scale line 62).

[0108] Furthermore, the diameter of the envelope circle formed by the second graduation line 62 is set to be equal to the pitch circle diameter of the transmission gear 611; this specific dimensional relationship is based on the following fundamental principle of gear and rack transmission:

[0109] When the transmission gear 611 rotates one revolution, the axial linear movement distance of the transmission rack 411 meshing with it is theoretically equal to the circumference of the pitch circle of the transmission gear 611. When the diameter of the envelope circle formed by the second scale line 62 is equal to the diameter of the pitch circle of the transmission gear 611, the circumference of the envelope circle is equal to the circumference of the pitch circle of the transmission gear 611. In this case, after the driving member 6 drives the transmission gear 611 to rotate a certain angle from the zero position, the length reading on the second scale line 62 indicated by the pointer 33 is equal to the actual movement distance of the transmission rack 411, which is also equal to the actual axial movement distance of the guide shaft 4 and the pressure roller body 1.

[0110] Based on the above settings, when the operator adjusts the axial position of the guide shaft 4 by rotating the drive component 6, they only need to observe the scale value indicated by the pointer 33 on the second scale line 62 to clearly and intuitively obtain the axial movement distance of the guide shaft 4 and the pressure roller body 1 without conversion. This simplifies the operation process and improves the intuitiveness and accuracy of judging the axial position of the pressure roller body 1.

[0111] In one embodiment, referring to Figures 4 and 5, the driving member 6 includes a driving rod 63 and a hand-held turntable 64; the driving rod 63 is rotatably connected to the base 3, a transmission gear 611 is disposed at one end of the driving rod 63, the hand-held turntable 64 is detachably connected to the other end of the driving rod 63, and a second scale line 62 is disposed on the outer periphery of the hand-held turntable 64.

[0112] In this embodiment, the drive rod 63 can extend vertically as shown in FIG4. The middle part of the drive rod 63 can be rotatably connected to the base 3 by means of bearings, bushings and other rotatable connecting parts. The transmission gear 611 is coaxially connected to the lower end of the drive rod 63, and the hand-held turntable 64 is coaxially connected to the upper end of the drive rod 63. The hand-held turntable 64 can be detachably connected to the drive rod 63 by means of threaded connection, pin connection, snap-fit, etc.

[0113] In practical applications, operators can directly hold and rotate the handheld turntable 64, which in turn drives the transmission gear 611 via the drive rod 63, thereby adjusting the axial position of the guide shaft 4 and the pressure roller body 1. Simultaneously, since the second scale line 62 is located on the handheld turntable 64, the operator can directly and clearly observe the scale reading on the second scale line 62 of the pointer 33 while rotating the turntable 64 for adjustment. This allows for real-time control of the current axial movement distance of the guide shaft 4 and the pressure roller body 1, improving the immediacy and accuracy of displacement feedback. Furthermore, the detachable design of the handheld turntable 64 facilitates individual maintenance and replacement, thereby enhancing the applicability and application flexibility of the electrode rolling device.

[0114] In one embodiment, referring to Figures 4 and 5, the other end of the drive rod 63 is provided with a plurality of snap-fit ​​structures 631, which are arranged circumferentially along the drive rod 63; the hand-held turntable 64 is provided with a mating hole (not shown in the figure), and the wall of the mating hole is provided with a plurality of mating structures (not shown in the figure), which are arranged circumferentially along the mating hole; one of the snap-fit ​​structures 631 and the mating structures is a toothed structure, and the other of the snap-fit ​​structures 631 and the mating structures is a toothed structure; the other end of the drive rod 63 passes through the mating hole, and the plurality of snap-fit ​​structures 631 and the plurality of mating structures are engaged in a one-to-one snap-fit ​​engagement.

[0115] In this embodiment, as shown in Figure 4, when the handheld turntable 64 needs to be assembled onto the drive rod 63, the upper end of the drive rod 63 can be inserted from bottom to top into the mating hole of the handheld turntable 64, and the multiple snap-fit ​​structures 631 on the drive rod 63 can be aligned one by one with the multiple mating structures on the wall of the mating hole. Then, the handheld turntable 64 is pressed downward into the upper end of the drive rod 63, so that the multiple tooth structures and the multiple tooth groove structures mesh one by one, thereby achieving circumferential fixation between the handheld turntable 64 and the drive rod 63, allowing the handheld turntable 64 to transmit torque to the drive rod 63. Correspondingly, when it is necessary to disassemble the handheld turntable 64, the handheld turntable 64 can be directly pulled upward from the upper end of the drive rod 63, thus easily separating the handheld turntable 64 from the drive rod 63.

[0116] Based on the above-mentioned connection method between the handheld turntable 64 and the drive rod 63, the handheld turntable 64 and the drive rod 63 can achieve synchronous connection without relative rotation in the circumferential direction, which enables reliable torque transmission between the handheld turntable 64 and the drive rod 63. At the same time, it realizes quick assembly and disassembly operations of the handheld turntable 64 and the drive rod 63, and makes it easier to maintain and replace the handheld turntable 64 separately in the future, thereby improving the applicability and application flexibility of the electrode rolling device.

[0117] In one embodiment, referring to Figures 1 and 2, the guide shaft 4 is inserted and fitted into the pressure roller body 1 at its center; the electrode rolling device also includes a clamp structure 7 and a locking fastener (not shown in the figures); the locking fastener is connected to the clamp structure 7, and the guide shaft 4 is inserted into the inner ring of the clamp structure 7; the locking fastener is used to drive the inner ring of the clamp structure 7 to retract inward, so as to drive the clamp structure 7 to hug the guide shaft 4; the clamp structure 7 is used to abut against the end of the pressure roller body 1 to prevent the pressure roller body 1 from moving axially relative to the guide shaft 4.

[0118] In this embodiment, the center of the pressure roller body 1 is provided with a connecting through hole that extends axially; the middle part of the guide shaft 4 is inserted into the connecting through hole; the pressure roller body 1 can slide along the axial direction of the guide shaft 4 to adjust the axial position of the pressure roller body 1 according to the actual working conditions.

[0119] The clamp structure 7 can refer to any ring-shaped structural component with an opening, with the two sides of the opening forming the first end and the second end of the clamp structure 7, respectively. A locking fastener is simultaneously connected to both the first and second ends of the clamp structure 7. Under external force, the locking fastener can drive the first and second ends closer together or further apart, thereby causing the inner ring of the clamp structure 7 to contract inward or expand outward. Specifically, the locking fastener can be a fastening bolt. The first and second ends of the clamp structure 7 can each have threaded holes, and the fastening bolt can be threaded into both holes simultaneously. By tightening the fastening bolt, the operator can, based on the threaded engagement, move the first and second ends closer together or further apart, thus causing the inner ring of the clamp structure 7 to contract inward or expand outward.

[0120] In practical applications, as shown in Figure 2, two clamp structures 7 can be configured. Both clamp structures 7 are fitted onto the guide shaft 4 and are respectively located at both ends of the pressure roller body 1. After the pressure roller body 1 moves axially into position on the guide shaft 4, the operator can abut the two clamp structures 7 against the two end faces of the pressure roller body 1 respectively, and then drive the inner ring of the clamp structure 7 to retract inward through the locking fastener, so that the inner ring of the clamp structure 7 tightly hugs the outer circumferential surface of the guide shaft 4, thereby achieving relative fixation between the clamp structure 7 and the guide shaft 4. In this way, the clamp structure 7 fixed on the guide shaft 4 will prevent the pressure roller body 1 from moving axially relative to the guide shaft 4, that is, conveniently achieve axial limiting of the pressure roller body 1, thereby ensuring the positional stability of the pressure roller body 1 in the subsequent rolling operation.

[0121] Referring to Figures 1 to 3, in one embodiment of this application, the electrode pressing roller includes a pressing roller body 1 and at least two first scale lines 2; the pressing roller body 1 is used to perform a pressing operation on the battery electrode; the outer peripheral pressing surface 11 of the pressing roller body 1 is provided with a tape attaching area 111, which is arranged around the circumference of the pressing roller body 1 and is used to attach thickened tape 100; the first scale lines 2 are disposed on the outer peripheral pressing surface 11, and the first scale lines 2 extend along the axial direction of the pressing roller body 1 and pass through the tape attaching area 111; at least two first scale lines 2 are arranged at intervals along the circumference of the pressing roller body 1; in the circumferential direction of the pressing roller body 1, the maximum central angle between any two adjacent first scale lines 2 is not greater than 180°; the first scale lines 2 are engraved on the outer peripheral pressing surface 11 by laser engraving process.

[0122] Referring to Figures 1 to 5, in one embodiment of this application, the electrode rolling device includes a base 3, a guide shaft 4, and an electrode pressing roller as described in any of the above embodiments; both ends of the guide shaft 4 are connected to the base 3, and the pressing roller body 1 of the electrode pressing roller is rotatably connected to the middle of the guide shaft 4; both ends of the guide shaft 4 are movably connected to the base 3 along the axial direction of the pressing roller body 1; the electrode rolling device also includes a linear bearing 5, the outer ring of which is connected to the base 3, and both ends of the guide shaft 4 are slidably fitted into the inner ring of the linear bearing 5 along the axial direction of the pressing roller body 1; the electrode rolling device also includes a locking member; the locking member is movably connected to the base 3; the locking member is used to abut against the guide shaft 4 to prevent the guide shaft 4 from moving axially; the electrode rolling device also includes a drive... The driving component 6 is rotatably connected to the base 3. The driving component 6 has a first transmission part 61, and the guide shaft 4 has a second transmission part 41. The first transmission part 61 and the second transmission part 41 are connected in a transmission manner, and the first transmission part 61 and the second transmission part 41 constitute a motion conversion mechanism. The motion conversion mechanism is used to convert the rotational motion of the driving component 6 into the linear movement of the guide shaft 4. The first transmission part 61 is configured as a transmission gear 611. The second transmission part 41 is configured as a transmission rack 411, which extends axially along the pressure roller body 1. The transmission gear 611 meshes with the transmission rack 411 for transmission. The transmission rack 411 is arranged circumferentially around the guide shaft 4. A second scale line 62 is provided on the outer periphery of the driving component 6. The base 3 extends circumferentially around the rotation center axis of the transmission gear 611; the base 3 is provided with a pointer part 33, which points to the second scale line 62; during the rotation of the driving member 6, the pointer part 33 is used to align with the corresponding scale value on the second scale line 62 to indicate the amount of rotation of the driving member 6; the second scale line 62 is used to indicate the length; the diameter of the envelope circle formed by the second scale line 62 is equal to the pitch circle diameter of the transmission gear 611; the driving member 6 includes a driving rod 63 and a hand-held turntable 64; the driving rod 63 is rotatably connected to the base 3, the transmission gear 611 is disposed at one end of the driving rod 63, the hand-held turntable 64 is detachably connected to the other end of the driving rod 63, and the second scale line 62 is disposed on the outer periphery of the hand-held turntable 64; The other end of the drive rod 63 is provided with multiple snap-fit ​​structures 631, which are arranged circumferentially along the drive rod 63; the hand-held turntable 64 is provided with a mating hole, and the wall of the mating hole is provided with multiple mating structures, which are arranged circumferentially along the mating hole; one of the snap-fit ​​structures 631 and the mating structures is a toothed structure, and the other of the snap-fit ​​structure 631 and the mating structure is a toothed structure; the other end of the drive rod 63 passes through the mating hole, and the multiple snap-fit ​​structures 631 and the multiple mating structures are snap-fitted one-to-one; the middle part of the guide shaft 4 passes through and is fitted into the pressure roller body 1; the electrode rolling device also includes a clamp structure 7 and a locking fastener; the locking fastener is connected to the clamp structure 7, and the guide shaft 4 passes through the inner ring of the clamp structure 7;The locking fastener is used to drive the inner ring of the clamp structure 7 to retract inward, so that the clamp structure 7 engages with the guide shaft 4; the clamp structure 7 is used to abut against the end of the pressure roller body 1 to prevent the pressure roller body 1 from moving axially relative to the guide shaft 4.

[0123] It should be noted that other contents of the electrode pressing roller and electrode pressing device disclosed in this application can be found in the prior art, and will not be repeated here.

[0124] The above are merely optional embodiments of this application and do not limit the patent scope of this application. All equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An electrode pressure roller, characterized in that, The electrode pressing roller includes: a pressing roller body for pressing battery electrodes; an adhesive tape attachment area on the outer circumferential pressing surface of the pressing roller body, the adhesive tape attachment area being arranged around the circumference of the pressing roller body and used for attaching thickened adhesive tape; at least two first scale lines, the first scale lines being arranged on the outer circumferential pressing surface, the first scale lines extending axially along the pressing roller body and passing through the adhesive tape attachment area; and at least two first scale lines being arranged at intervals along the circumference of the pressing roller body.

2. The electrode pressure roller according to claim 1, characterized in that, In the circumferential direction of the pressure roller body, the maximum central angle between any two adjacent first scale lines is no greater than 180°.

3. The electrode pressure roller according to any one of claims 1 to 2, characterized in that, The first scale line is a laser-engraved layer on the outer peripheral roller surface, and the color of the first scale line differs from the base color of the outer peripheral roller surface.

4. An electrode rolling device, characterized in that, The electrode rolling device includes a base, a guide shaft, and an electrode rolling roller as described in any one of claims 1 to 3; both ends of the guide shaft are connected to the base, and the roller body of the electrode rolling roller is rotatably connected to the guide shaft.

5. The electrode rolling device according to claim 4, characterized in that, The two ends of the guide shaft are movably connected to the base along the axial direction of the pressure roller body.

6. The electrode rolling device according to claim 5, characterized in that, The electrode roller pressing device also includes a linear bearing, the outer ring of which is connected to the base, and the two ends of the guide shaft are slidably fitted into the inner ring of the linear bearing along the axial direction of the pressing roller body.

7. The electrode rolling device according to claim 5, characterized in that, The electrode rolling device further includes a locking element; the locking element is movably connected to the base; the locking element is used to abut against the guide shaft to prevent the guide shaft from moving axially.

8. The electrode rolling device according to claim 5, characterized in that, The electrode rolling device further includes a driving component, which is rotatably connected to the base. The driving component has a first transmission part, and the guide shaft has a second transmission part. The first transmission part and the second transmission part are connected in a transmission manner. The first transmission part and the second transmission part constitute a motion conversion mechanism, which is used to convert the rotational motion of the driving component into the linear movement of the guide shaft.

9. The electrode rolling device according to claim 8, characterized in that, The first transmission part is configured as a transmission gear; the second transmission part is configured as a transmission rack, the transmission rack extending axially along the pressure roller body; the transmission gear meshes with the transmission rack for transmission.

10. The electrode rolling device according to claim 9, characterized in that, The transmission rack is arranged circumferentially around the guide shaft.

11. The electrode rolling device according to claim 9, characterized in that, The outer periphery of the drive component is provided with a second scale line, which extends circumferentially around the rotation center axis of the transmission gear; the base is provided with a pointer part, which points to the second scale line; during the rotation of the drive component, the pointer part is used to align with the corresponding scale value on the second scale line to indicate the amount of rotation of the drive component.

12. The electrode rolling device according to claim 11, characterized in that, The second scale line is used to indicate length; the diameter of the envelope circle formed by the second scale line is equal to the pitch circle diameter of the transmission gear.

13. The electrode rolling device according to claim 11, characterized in that, The driving component includes a driving rod and a handheld turntable; the driving rod is rotatably connected to the base, the transmission gear is disposed at one end of the driving rod, the handheld turntable is detachably connected to the other end of the driving rod, and the second scale line is disposed on the outer periphery of the handheld turntable.

14. The electrode rolling device according to claim 13, characterized in that, The other end of the drive rod is provided with multiple snap-fit ​​structures, which are arranged circumferentially along the drive rod; the hand-held turntable is provided with a mating hole, and the wall of the mating hole is provided with multiple mating structures, which are arranged circumferentially along the mating hole; one of the snap-fit ​​structures and the mating structures is a toothed structure, and the other of the snap-fit ​​structure and the mating structure is a toothed structure; the other end of the drive rod passes through the mating hole, and the multiple snap-fit ​​structures and the multiple mating structures are engaged in a one-to-one snap-fit ​​engagement.

15. The electrode rolling device according to any one of claims 4 to 14, characterized in that, The guide shaft passes through and fits into the pressure roller body at its center; the electrode rolling device also includes a clamp structure and a locking device; the locking device is connected to the clamp structure, and the guide shaft passes through the inner ring of the clamp structure; the locking device is used to drive the inner ring of the clamp structure to contract inward, so as to drive the clamp structure to hug the guide shaft; the clamp structure is used to abut against the end of the pressure roller body to prevent the pressure roller body from moving axially relative to the guide shaft.

Images