Deviation rectifying mechanism used on lithium battery coating machine
By designing a compact correction mechanism on the lithium battery coating machine and using sensors and controllers to achieve adaptive correction, the problems of space constraints and insufficient precision are solved, thereby improving the accuracy and production efficiency of electrode coating.
Patent Information
- Application Number
- CN202511355246.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-22
- Publication Date
- 2026-01-20
AI Technical Summary
The existing correction system of lithium battery coating machine cannot be installed due to space limitations, which causes the electrode to shift, affecting the accuracy of coating position and product quality. In addition, the traditional correction system lacks precision and automation.
Design a compact correction mechanism, including a base, a moving block, and a follower seat. Driven by a lead screw and a motor, and combined with displacement, thickness, speed sensors and a controller, it achieves adaptive correction and precisely adjusts the electrode offset.
It enables effective installation in space-constrained workstations, achieves a correction accuracy of ±0.1mm, improves electrode coating pass rate by 10%-15%, reduces production costs, and enhances production quality and efficiency.
Smart Images
Figure CN121361698A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of lithium battery production equipment, and particularly relates to a deviation rectifying mechanism used on a lithium battery coating machine. BACKGROUND
[0002] In the production process of a lithium ion battery, coating of an electrode sheet is one of the most important processes. When the electrode sheet is transported on a conveying roller of the coating machine, the electrode sheet is prone to deviation due to factors such as vibration of the equipment, parallelism deviation of the conveying roller, and uneven tension of the electrode sheet itself. If the deviation of the electrode sheet cannot be corrected in time, the coating position of the electrode sheet will be inaccurate, and defects such as deviation of the coating layer and missing coating will occur, which seriously affects the performance and quality of the lithium ion battery, and even causes a large amount of electrode sheets to be scrapped, increasing the production cost.
[0003] At present, the driving assembly of the deviation rectifying system is fixed on the fixed frame of the coating machine by bolts, the frame sliding assembly is installed on one side of the driving assembly by another set of independent fixing members, and the roller mounting assembly is separately installed on the sliding part of the frame sliding assembly. The three assemblies are connected through a long connecting shaft, a transmission belt and a complex wire pipe. This dispersed structure design makes the entire deviation rectifying system need to occupy a large space in the transverse and longitudinal directions, resulting in a large overall volume.
[0004] On the lithium battery coating machine, many key workstations (such as a pre-drying workstation after coating of the electrode sheet, a multi-layer electrode sheet composite workstation, etc.) need to accommodate drying equipment, composite rollers, tension control devices and other important production components, so the space available for installing the deviation rectifying system is very limited. The transverse space is usually only 60%-70% of the space required by the conventional deviation rectifying system, and the longitudinal space can only meet 50%-60% of the space required by the conventional system. Therefore, the deviation rectifying system with the existing structure cannot be installed on these space-restricted workstations, which further leads to the fact that these workstations cannot achieve effective deviation rectifying operation, and the electrode sheet is prone to deviation during the transmission process, affecting the quality of subsequent cutting, winding and other processes, and reducing the product qualification rate. SUMMARY
[0005] The present application provides a deviation rectifying mechanism used on a lithium battery coating machine to solve the problem that the deviation of the electrode sheet leads to inaccurate coating position of the electrode sheet, and defects such as deviation of the coating layer and missing coating.
[0006] The present application provides a deviation rectifying mechanism used on a lithium battery coating machine, which comprises a deviation rectifying assembly, two deviation rectifying assemblies are symmetrically arranged at opposite ends of an electrode sheet conveying roller, and each deviation rectifying assembly comprises: a base, the base is arranged close to the end of the electrode sheet conveying roller; a moving block, the moving block is arranged on the base and can move on the moving block in a preset direction, the preset direction forms an angle with the axial direction of the electrode sheet conveying roller; The follow-up seat is rotatably arranged on the moving block, connected with the end of the pole piece conveying roller, and can rotate with the deflection of the pole piece conveying roller.
[0007] In a possible design, the device further comprises a driving member in transmission connection with the at least one deviation rectifying assembly, for driving the corresponding moving block to move in the preset direction.
[0008] In a possible design, the driving member comprises: A lead screw is arranged on the base, and the length direction of the lead screw is the preset direction, and the moving block is threadedly sleeved on the lead screw; A motor is in transmission connection with the lead screw, and drives the moving block to move in the length direction of the lead screw by driving the lead screw to rotate.
[0009] In a possible design, the follow-up seat comprises: A horizontal plate is arranged on the upper end of the moving block and is in rotational cooperation with the moving block; A vertical plate is arranged on the horizontal plate, and a plurality of bearing seats are arranged on the vertical plate, and the plurality of pole piece conveying rollers are respectively arranged on the vertical plate through the corresponding bearing seats.
[0010] In a possible design, the device further comprises a displacement sensor for collecting the real-time displacement of the pole piece edge from the reference position.
[0011] In a possible design, the device further comprises a thickness sensor for collecting the real-time thickness of the pole piece.
[0012] In a possible design, the device further comprises an encoder for collecting the real-time conveying speed of the pole piece.
[0013] In a possible design, the device further comprises a speed sensor for collecting the moving speed of the moving block.
[0014] In a possible design, the device further comprises a controller, an input end of the controller is connected with the displacement sensor, the thickness sensor and the encoder respectively, and an output end of the controller is connected with the motor, and the controller adjusts the moving speed of the moving block according to the real-time displacement, the real-time thickness and the real-time conveying speed of the pole piece to realize adaptive deviation rectification.
[0015] In a possible design, the controller adjusts the moving speed of the moving block according to the real-time displacement, the real-time thickness and the real-time conveying speed of the pole piece to realize adaptive deviation rectification, and the moving speed of the moving block is calculated by the following formula:
[0016] Wherein, v s is the moving speed of the moving block, k is an adaptive correction coefficient, d is the real-time displacement of the pole piece, v fis the real-time transmission speed of the pole piece; h is the real-time thickness of the pole piece.
[0017] The beneficial effects of the present application are as follows: The present application is a correction mechanism used in a lithium battery coating machine. By combining the base, moving block and follower block together, a new lithium battery coating machine special driving sliding assembly mechanical structure is formed, and the excess mechanical structure is removed, so that the entire frame structure is more compact, to meet the space limited work station installation correction system on the lithium battery coating machine.
[0018] The correction mechanism can quickly respond to the offset of the pole piece, and the correction action can be started within 0.5-1 seconds after the pole piece is offset. The correction accuracy can reach ±0.1mm, which is much higher than the correction accuracy of the traditional correction mechanism. At the same time, the correction mechanism can automatically adjust the correction speed according to the thickness, transmission speed and other parameters of the pole piece, avoiding over-correction or under-correction. The pole piece does not appear to be damaged, such as wrinkling and stretching, during the correction process. The coating qualification rate of the pole piece is improved by 10%-15%, which significantly improves the quality and efficiency of lithium battery production and reduces production costs. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application. Those skilled in the art can obtain other drawings without creative labor based on these drawings.
[0020] Fig. 1 The front view of the correction mechanism provided by the embodiment of the present application; Fig. 2 The top view of the correction mechanism provided by the embodiment of the present application; Fig. 3 The structural schematic diagram of a correction assembly of the correction mechanism provided by the embodiment of the present application; Reference signs: 100, base; 200, moving block; 300, follower seat; 310, horizontal plate; 320, vertical plate; 410, screw rod; 420, motor; 500, pole piece conveying roller. DETAILED DESCRIPTION
[0021] The technical solutions of the present application will be described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0022] The following will be described in conjunction withFigs. 1-3 The application discloses a deviation rectifying mechanism for a lithium battery coating machine. The base 100 is arranged close to the end of the pole piece conveying roller 500, and provides a stable mounting base for the whole deviation rectifying mechanism, so that the deviation rectifying mechanism will not be deviated due to vibration or other factors during the operation, and the stability of the deviation rectifying operation is ensured.
[0023] The moving block 200 is arranged on the base 100 and can move on the base 100 in a preset direction, and the preset direction forms an angle with the axial direction of the pole piece conveying roller 500. The position adjustment of the subsequent connected components can be realized by the movement of the moving block 200 in the preset direction, so that the position of the pole piece conveying roller 500 is changed, and the deviation of the pole piece is rectified. The design that the preset direction forms an angle with the axial direction of the pole piece conveying roller 500 makes the movement of the moving block 200 be more effectively converted into the deviation rectifying action of the pole piece conveying roller 500, the deviation rectifying range is expanded, and the flexibility of the deviation rectifying is improved.
[0024] The follow-up seat 300 is rotatably arranged on the moving block 200 and connected with the end of the pole piece conveying roller 500, and the follow-up seat 300 can rotate with the inclination of the pole piece conveying roller 500. The arrangement of the follow-up seat 300 makes the pole piece conveying roller 500 be self-adaptively adjusted by the rotation of the follow-up seat 300 when the pole piece conveying roller 500 is inclined, so that the additional stress of the pole piece conveying roller 500 due to forced deviation rectifying is avoided, the pole piece conveying roller 500 and the pole piece are protected from being damaged, and the stability of the deviation rectifying process is ensured.
[0025] Specifically, the follow-up seat 300 comprises a horizontal plate 310 and a vertical plate 320. The horizontal plate 310 is arranged at the upper end of the moving block 200 and rotationally cooperates with the moving block 200. The rotation cooperation between the horizontal plate 310 and the moving block 200 provides a basis for the rotation of the follow-up seat 300, so that the follow-up seat 300 can rotate around the connecting point of the horizontal plate 310 and the moving block 200 to adapt to the inclination of the pole piece conveying roller 500. The vertical plate 320 is arranged on the horizontal plate 310, and a plurality of bearing seats are arranged on the vertical plate 320. The plurality of pole piece conveying rollers 500 are respectively installed on the vertical plate 320 through the corresponding bearing seats. The arrangement of the bearing seats reduces the friction between the pole piece conveying roller 500 and the vertical plate 320, so that the pole piece conveying roller 500 can rotate flexibly and the smooth transmission of the pole piece is ensured. Meanwhile, the plurality of bearing seats can realize the simultaneous installation of the plurality of pole piece conveying rollers 500, the applicability of the deviation rectifying mechanism is improved, and the demand of the lithium battery coating machine with different numbers of pole piece conveying rollers 500 can be met.
[0026] To realize the automatic movement of the moving block 200 along the preset direction, the deviation rectifying mechanism further comprises a driving member in transmission connection with at least one deviation rectifying assembly for driving the corresponding moving block 200 to move along the preset direction. The driving member provides power instead of the traditional manual adjustment mode, thereby improving the automation degree and adjustment efficiency of deviation rectification.
[0027] Further, the driving member comprises a lead screw 410 and a motor 420. The lead screw 410 is installed on the base 100, and the length direction of the lead screw 410 is the preset direction. The moving block 200 is threadedly sleeved on the lead screw 410. The thread cooperation between the lead screw 410 and the moving block 200 converts the rotary motion of the lead screw 410 into the linear motion of the moving block 200. This transmission mode has the advantages of high transmission accuracy, good stability, no sliding, etc., and can ensure the accurate movement of the moving block 200 along the preset direction, thereby improving the deviation rectification accuracy.
[0028] To realize the real-time collection of the related parameters of the pole piece and provide data support for the adaptive deviation rectification, the deviation rectifying mechanism further comprises a displacement sensor, a thickness sensor, an encoder and a speed sensor.
[0029] The displacement sensor is used to collect the real-time offset of the edge of the pole piece from the reference position. The detection direction of the displacement sensor is aligned with the edge of the pole piece, which can accurately detect the offset of the pole piece during the transmission process and convert the offset into an electrical signal for transmission to the subsequent controller, thereby providing a key basis for the controller to determine whether deviation rectification is needed and to determine the deviation rectification amount.
[0030] The thickness sensor is used to collect the real-time thickness of the pole piece. Different thicknesses of the pole piece have different rigidity and stress conditions during the transmission process, and different requirements for the deviation rectification force and speed. The thickness sensor is installed above or below the pole piece conveying roller 500. By collecting the real-time thickness of the pole piece, the controller can fully consider the thickness factor during deviation rectification adjustment, thereby avoiding poor deviation rectification effect caused by the thickness difference of the pole piece.
[0031] The encoder is used to collect the real-time transmission speed of the pole piece. The transmission speed of the pole piece directly affects the development speed of the pole piece offset. If the pole piece offset is not corrected in time, the faster the transmission speed, the more serious the consequences. The encoder is installed at one end of the pole piece conveying roller 500 and rotates synchronously with the pole piece conveying roller 500. The encoder collects the real-time transmission speed of the pole piece, so that the controller can adjust the deviation rectification speed in time according to the speed change, thereby ensuring that the deviation rectification action can keep up with the rhythm of the pole piece offset.
[0032] The speed sensor is used to collect the moving speed of the moving block 200. The speed sensor is installed on one side of the moving block 200 and is used to collect the moving speed of the moving block 200. By monitoring the moving speed of the moving block 200 in real time, the moving speed can be compared with the target speed preset by the controller. If there is a deviation, the controller can adjust the output of the motor 420 in time to ensure that the moving block 200 moves at the preset speed, thereby ensuring the stability and accuracy of the correction process.
[0033] In order to realize intelligent control and self-adaptive correction of the entire correction mechanism, the correction mechanism further comprises a controller, the input end of the controller is connected with the displacement sensor, the thickness sensor and the encoder, and the output end of the controller is connected with the motor 420.
[0034] The controller adjusts the moving speed of the moving block 200 according to the real-time offset of the pole piece, the real-time thickness and the real-time transmission speed to realize self-adaptive correction. The moving speed of the moving block 200 is calculated by the following formula:
[0035] Wherein, v s is the moving speed of the moving block 200; k is the self-adaptive correction coefficient, which is related to the equipment model and the material of the pole piece, and can be adjusted according to the actual production conditions and the material characteristics of the pole piece to ensure that the correction effect is optimal; d is the real-time offset of the pole piece; v f is the real-time transmission speed of the pole piece; and h is the real-time thickness of the pole piece.
[0036] According to the above formula, the controller can automatically calculate the optimal moving speed of the moving block 200 by comprehensively considering multiple key parameters of the pole piece, thereby realizing accurate and rapid correction of the offset of the pole piece and avoiding the problem of inaccurate correction caused by single factor consideration in the traditional correction method. The intelligent degree and correction effect of the correction mechanism are greatly improved.
[0037] The correction process of the correction mechanism of the present application is as follows: When the lithium battery coating machine starts to work, the pole piece is transmitted on the pole piece conveying roller 500, and each sensor starts to work: The displacement sensor collects the offset d of the edge of the pole piece from the reference position in real time and converts the offset data into an electrical signal to transmit to the controller; The thickness sensor collects the thickness h of the pole piece in real time and also converts the thickness data into an electrical signal to transmit to the controller; The encoder rotates synchronously with the pole piece conveying roller 500 and collects the transmission speed v f of the pole piece in real time and transmits the speed data to the controller; The speed sensor collects the moving speed vs and feed the speed data back to the controller.
[0038] After the controller receives the data transmitted by the various sensors, according to the preset adaptive correction coefficient k (in this embodiment, k is 0.8, which can be adjusted according to actual production), the target moving speed required by the moving block 200 is calculated by using the formula .
[0039] The controller compares the calculated target moving speed with the actual moving speed of the moving block 200 fed back by the speed sensor. If there is a deviation between the actual moving speed and the target moving speed, the controller sends a control signal to the motor 420 to adjust the rotating speed of the motor 420.
[0040] The motor 420 adjusts the rotating speed according to the control signal of the controller, drives the lead screw 410 to rotate through the shaft coupling, and the rotation of the lead screw 410 drives the moving block 200 on the threaded sleeve to move in the preset direction. The moving speed of the moving block 200 is gradually adjusted to the target moving speed.
[0041] While the moving block 200 moves, the follow-up seat 300 is also moved. During the movement of the follow-up seat 300, if the pole piece conveying roller 500 is deflected, the follow-up seat 300 will rotate around the connecting point of the horizontal plate 310 and the moving block 200 with the deflection of the pole piece conveying roller 500, realizing adaptive adjustment and ensuring that the pole piece conveying roller 500 always maintains a stable transmission state, thereby correcting the deviation of the pole piece.
[0042] During the entire correction process, each sensor continuously collects data and transmits it to the controller. The controller continuously adjusts the rotating speed of the motor 420 according to the real-time data, thereby adjusting the moving speed of the moving block 200, realizing continuous and accurate correction of the deviation of the pole piece, and ensuring the stable operation of the pole piece coating process.
[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0044] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of the technical features indicated. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.
[0045] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected or can communicate with each other; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0046] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.
[0047] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.
Claims
1. A deviation rectifying mechanism used on a lithium battery coating machine, characterized in that, The device comprises a deviation rectifying assembly, two of which are symmetrically arranged at opposite ends of the pole piece conveying roller, each of which comprises: a base arranged near the end of the pole piece conveying roller; a moving block arranged on the base and capable of moving in a preset direction at an angle to the axial direction of the pole piece conveying roller; a follower seat rotatably arranged on the moving block and connected with the end of the pole piece conveying roller, which is capable of rotating with the pole piece conveying roller.
2. The correction mechanism for use on a lithium battery coater as claimed in claim 1, wherein The device further comprises a driving member in driving connection with at least one of the deviation rectifying assemblies for driving the corresponding moving block to move in the preset direction.
3. The correction mechanism for use on a lithium battery coater as claimed in claim 2, wherein The driving member comprises: a screw rod installed on the base, the length direction of which is the preset direction, and the moving block is threadedly sleeved on the screw rod; a motor in driving connection with the screw rod for driving the screw rod to rotate and in turn driving the moving block to move in the length direction of the screw rod.
4. The correction mechanism for use on a lithium battery coater as claimed in claim 3, wherein The follower seat comprises: a horizontal plate arranged on the upper end of the moving block and rotatably connected with the moving block; a vertical plate arranged on the horizontal plate, on which a plurality of bearing seats are arranged, and a plurality of pole piece conveying rollers are respectively installed on the vertical plate through the corresponding bearing seats.
5. The correction mechanism for use on a lithium battery coater as claimed in any one of claims 1 to 4, wherein The device further comprises a displacement sensor for collecting the real-time displacement of the edge of the pole piece from the reference position.
6. The correction mechanism for use on a lithium battery coater as claimed in claim 5, wherein The device further comprises a thickness sensor for collecting the real-time thickness of the pole piece.
7. The correction mechanism for use on a lithium battery coater as claimed in claim 6, wherein The device further comprises an encoder for collecting the real-time conveying speed of the pole piece.
8. The correction mechanism for use on a lithium battery coater as claimed in claim 7, wherein The device further comprises a speed sensor for collecting the moving speed of the moving block.
9. The correction mechanism for use on a lithium battery coater as claimed in claim 8, wherein, The device further comprises a controller, the input end of which is connected with the displacement sensor, the thickness sensor and the encoder, and the output end of which is connected with the motor, and the controller adjusts the moving speed of the moving block according to the real-time displacement, real-time thickness and real-time conveying speed of the pole piece to realize self-adaptive deviation rectification.
10. The correction mechanism for use on a lithium battery coater as claimed in claim 9, wherein, The controller adjusts the moving speed of the moving block according to the real-time displacement, real-time thickness and real-time conveying speed of the pole piece to realize self-adaptive deviation rectification, wherein the moving speed of the moving block is calculated by the following formula: Wherein, v s is the moving speed of the moving block; k is the adaptive correction coefficient; d is the real-time displacement of the pole piece; v f is the real-time transmission speed of the pole piece; h is the real-time thickness of the pole piece.