Pole piece winding device

Abstract

The utility model relates to the technical field of pole piece winding, concretely is a kind of pole piece winding device, comprising: base body;Winding mechanism is used to wind pole piece;First tension adjusting mechanism is configured as driving pole piece to the direction of moving away from its initial conveying path;Second tension adjusting mechanism is configured as to pole piece apply the force towards the radial side of winding mechanism;Second tension adjusting mechanism further includes elastic element, and the proportional coefficient between the variation amount of force applied to pole piece by elastic element and the variation amount of winding number, and proportional coefficient is positively related to pole piece conveying path length. Through two-stage adjusting mechanism cooperative control tension, first tension adjusting mechanism changes pole piece storage tape length in real time by lifting, completes pole piece path adjustment, second tension adjusting mechanism applies radial force to pole piece, and the force is linearly related with winding number, and proportional coefficient automatically increases with storage tape length, realize path-pressure double control, prevent the tension mutation when device start-stop, acceleration and deceleration.

Description

Technical Field

[0001] This utility model relates to the field of electrode winding technology, specifically to an electrode winding device. Background Technology

[0002] Lithium-ion batteries, due to their advantages such as high energy density, long cycle life, and environmental friendliness, have been widely used in 3C digital products, power tools, new energy vehicles, and energy storage power stations. As the core component of lithium-ion batteries, the quality of the electrode directly determines the battery's energy density, cycle performance, and safety performance. During the electrode manufacturing process, after coating, rolling, and slitting, a winding device is typically used to wind the electrode. Current electrode winding devices generally employ a single-point oscillating roller or fixed guide roller combined with a magnetic powder brake / motor torque mode to achieve tension control. Typically, constant pressure is provided by the oscillating roller's own weight or a cylinder, causing the electrode to wrap at a certain angle. Adjusting the motor torque changes the tensile force on the electrode, thus regulating the electrode tension. This method has several common problems: excessive tension leads to coating cracking and foil plastic deformation, resulting in dark cracks during subsequent rolling; insufficient tension or severe fluctuations cause the electrode to slip between layers within the roll, forming wrinkles and interlayer bubbles; as the roll diameter increases, changes in moment of inertia and linear velocity cause the tension to increase non-linearly, which traditional fixed pressure rollers or counterweight oscillating rollers cannot match in real time, requiring frequent shutdowns for manual adjustment, resulting in low efficiency and a high scrap rate; furthermore, switching to different electrode widths requires stopping the machine to disassemble the entire pressure roller or oscillating roller assembly for repositioning and calibration, leading to lengthy single-change times and making it difficult to meet the demands of high-speed continuous production.

[0003] Based on the above problems, existing technologies have attempted to introduce multi-segment tension control, air flotation support, servo pushing and other technologies, but most of them are complex in structure and expensive. Moreover, existing technologies lack a comprehensive method to suppress key indicators such as edge wrinkles, interlayer bubbles and end face flatness.

[0004] Therefore, how to develop an electrode winding device that can adjust the electrode path length, make the radial pressure linearly adjustable with the winding diameter, and achieve dual closed-loop coordinated control of tension and pressure under high-speed conditions has become an urgent problem to be solved in the field of lithium battery manufacturing. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of this invention is to provide an electrode winding device capable of adjusting the electrode path length and making the radial pressure linearly adjustable with the winding diameter. It can achieve dual closed-loop coordinated control of tension and pressure under high-speed operating conditions, thereby solving problems such as excessive tension adjustment fluctuations and mismatch between pressure and the number of electrode winding turns in the prior art.

[0006] The electrode winding device according to an embodiment of the present invention includes: Matrix; A winding mechanism fixed to the substrate extends along the width direction of the electrode sheet and is used to wind up the electrode sheet; The first tension adjustment mechanism, along the electrode conveying direction, is located upstream of the winding mechanism. The first tension adjustment mechanism is configured to drive the electrode to move away from its initial conveying path, so as to change the length of the electrode conveying path and adjust the tension of the electrode. The second tension adjustment mechanism is located on one side of the winding mechanism along the electrode travel direction. The second tension adjustment mechanism is configured to apply a force to the electrode toward the radial side of the winding mechanism. The second tension adjustment mechanism also includes an elastic element for applying force to the electrode. When the elastic element contacts the electrode, there is a proportionality coefficient between the change in the force applied to the electrode and the change in the number of winding turns. The proportionality coefficient is positively correlated with the length of the electrode conveying path.

[0007] According to the embodiment of the present invention, the electrode winding device controls the tension through a two-stage adjustment mechanism. The first tension adjustment mechanism changes the length of the electrode storage strip in real time by raising and lowering to complete the electrode path adjustment. The second tension adjustment mechanism applies a radial force to the electrode pointing towards the winding core, and the force is linearly related to the number of winding turns. The proportional coefficient automatically increases with the length of the storage strip, realizing path-pressure dual control and preventing sudden tension changes when the device starts, stops, accelerates, or decelerates.

[0008] In some examples of this utility model, the first tension adjustment mechanism includes an adjustment roller that can rotate about its own axis, and the outer surface of the adjustment roller can abut against one side of the electrode sheet.

[0009] In some examples of this utility model, the first tension adjusting mechanism further includes a lifting cylinder, an adjusting roller, and... A support sleeve is provided along the axial direction of the adjusting roller shaft and covers one end of it; The output end of the lifting cylinder abuts against at least one side of the support sleeve, and is configured to drive the support sleeve to move in the vertical direction.

[0010] In some examples of this invention, the elastic element includes an elastic pad and a spring configured to drive the elastic pad to move, the elastic pad being configured to contact the electrode.

[0011] In some examples of this utility model, the second tension adjustment mechanism further includes a fixing component. The elastic element is mounted on the fixing component. The fixing component includes a connecting frame, a support, and a force transmission component connected to both. The force transmission component has receiving portions on both sides. The receiving portions are slotted from one end to form a cavity for receiving the elastic element. The connecting frame has at least one top block fixed along its length direction. The top block is limited in the cavity and connected to the elastic element.

[0012] In some examples of this utility model, multiple fixing plates are bolted to the base, arranged symmetrically in pairs on the base, with each pair of fixing plates recessed from its opposite end to the other end, and a second tension adjustment mechanism is provided at the recess of the fixing plate.

[0013] In some examples of this utility model, the winding device further includes at least one adjusting ring, which is disposed along the outer surface of the adjusting roller and has a degree of freedom to move in the axial direction of the adjusting roller, for limiting the position of the electrode sheet on the roller surface of the adjusting roller.

[0014] In some examples of this utility model, the adjusting ring is connected to a push block, which is embedded and fixed to at least one end face of the adjusting ring. The push block protrudes outward along the radial direction of the adjusting ring to form a push column for transmitting external force.

[0015] In some examples of this utility model, the winding mechanism includes a winding roller, a bearing seat, and a take-up motor. The bearing seat is fixed to the base, the winding roller is rotatably mounted on the bearing seat, the base protrudes outward from one side wall, and the take-up motor is fixed to the protruding part of the base and is connected to the winding roller in a transmission connection.

[0016] In some examples of this utility model, the winding device further includes at least one guide roller disposed on one side of the first tension adjusting mechanism and / or inside the first tension adjusting mechanism.

[0017] The beneficial effects of this utility model are as follows: 1. This utility model controls tension through a two-stage adjustment mechanism. The first tension adjustment mechanism drives the adjustment roller to rise and fall with a cylinder, changing the length of the electrode storage strip in real time and completing the electrode path adjustment. The second tension adjustment mechanism applies a radial force to the electrode pointing towards the core with an elastic element. This force is linearly related to the number of winding turns, and the proportional coefficient automatically increases with the length of the storage strip, realizing dual control of path and pressure. This can reduce the peak value of electrode tension fluctuation and prevent sudden tension changes when the device starts, stops, accelerates, or decelerates.

[0018] 2. This utility model can adaptively compensate for pressure based on the winding diameter of the electrode sheet. The elastic element adopts a spring and elastic pad structure. The pad is in close contact with the electrode sheet surface, and the pressure distribution is uniform. The spring compression increases linearly with the winding diameter, avoiding air entrainment between layers.

[0019] 3. The adjusting ring of this utility model can be manually moved to complete the width switching of the electrode in a short time. The elastic element and spring are enclosed in the cavity, reducing the frequency of maintenance.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the electrode winding device provided in the embodiments of this application; Figure 2 A schematic diagram illustrating the interaction between the first tension adjustment mechanism and the substrate provided in this embodiment of the application; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A; Figure 4 This is a schematic diagram showing the cooperation between the second tension adjustment mechanism and the substrate provided in the embodiments of this application; Figure 5 This is a schematic diagram showing the cooperation between the spring, the receiving part, and the top block provided in the embodiments of this application.

[0022] Figure label: 1-Substrate, 101-Fixing plate, 102-Recessed groove; 201-Winding roller, 202-Shaft seat, 203-Take-up motor; 3-First tension adjustment mechanism, 301-Adjusting roller, 302-Lifting cylinder, 303-Adjusting roller shaft, 304-Support sleeve, 305-Adjusting ring, 306-Push block, 307-Push column; 4-Second tension adjustment mechanism, 401-Connecting frame, 402-Bracket, 403-Force transmission component, 404-Receiving part, 405-Top block; 501 - Elastic pad, 502 - Spring; 6-Passing roller. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0024] Please see Figures 1-5 This application provides an electrode winding device, comprising: Matrix 1; A winding mechanism fixed on the substrate 1 extends along the width direction of the electrode sheet and is used to wind up the electrode sheet; The first tension adjustment mechanism 3 is located upstream of the winding mechanism along the electrode conveying direction. The first tension adjustment mechanism 3 is configured to drive the electrode to move away from its initial conveying path so as to change the length of the electrode conveying path and adjust the tension of the electrode. The second tension adjustment mechanism 4 is disposed on one side of the winding mechanism along the electrode strip traveling direction. The second tension adjustment mechanism 4 is configured to apply a force toward the radial side of the winding mechanism to the electrode strip. The second tension adjustment mechanism 4 also includes an elastic element for applying force to the electrode. When the elastic element contacts the electrode, there is a proportionality coefficient between the change in the force applied to the electrode and the change in the number of winding turns. The proportionality coefficient is positively correlated with the length of the electrode conveying path.

[0025] It should be noted that, as Figure 1 As shown, the winding mechanism extends along a first direction, which is the electrode width direction. Figure 1 The electrode extends along the Y direction. The second direction is the length direction of the electrode; in other words, the second direction is the electrode's carrying direction. Figure 1The X direction. The second tension adjustment mechanism 4 can be located downstream of the winding mechanism. In the specific implementation of this embodiment, when the winding mechanism is fixedly installed on the rigid substrate 1, after the electrode sheet is led out from the front end process, it first passes through the first tension adjustment mechanism 3 and then enters the winding mechanism for winding. The first tension adjustment mechanism 3 includes a movable motion component. Through the movement of this motion component in space, when the motion component is driven to deviate from the initial belt path, the electrode sheet is driven to wind an additional path, and the total path length increases accordingly. When the motion component retracts, the additional path shortens. By adjusting the forward and backward stroke of the motion component in real time, the system can quickly adjust the electrode sheet movement path without stopping the belt, so that the electrode sheet tension is always kept in the target range, avoiding tensile deformation or loose wrinkles caused by sudden tension changes.

[0026] Specifically, a second tension adjustment mechanism 4 is arranged near the winding mechanism. It abuts against the electrode surface in the radial direction of the winding mechanism through an elastic element, which in this embodiment can be an elastic pressure roller or elastic pressure plate connected to a spring 502. The clamping force of the elastic element increases approximately linearly with the increase of the roll diameter, and there is a positive proportional relationship between the change of this force and the change of the current number of winding turns. At the same time, this proportional relationship is positively correlated with the "extra path length" that the first tension adjustment mechanism 3 can provide. That is, when the system increases the stroke of the moving component of the first tension adjustment mechanism 3 due to process needs, and the travel path of the electrode is longer, the "force-number of turns" proportional coefficient of the elastic element also increases synchronously. This ensures that the electrode surface still obtains stable and appropriate radial pressure during the rapid change of roll diameter, prevents interlayer air entrainment, and avoids overpressure that could cause electrode deformation or active material shedding.

[0027] It is important to emphasize that, through the above-mentioned two-level tension coordination mechanism, the entire production line can reduce the peak tension fluctuation through the dual buffering of path length adjustment and radial pressure adjustment when starting, stopping, accelerating, decelerating, changing rolls or experiencing abnormal strip breakage. The edges of the electrode sheets are less prone to wavy edges, warping or micro-cracks, and the end face of the wound roll is flat and the interlayer is dense. The yield rate of subsequent slitting, stacking or winding processes is significantly improved. At the same time, the equipment maintenance cycle is greatly extended and the operating cost is reduced.

[0028] In some embodiments, such as Figure 1 and Figure 2 As shown, the first tension adjustment mechanism 3 includes an adjustment roller 301, which can rotate around its own axis, and the outer surface of the adjustment roller 301 can abut against one side of the electrode sheet.

[0029] Specifically, the first tension adjustment mechanism 3 adopts an adjustment roller 301 that can rotate freely around its own axis; the outer peripheral surface of the adjustment roller 301 makes rolling contact with one side of the electrode surface without introducing additional sliding friction, so that the coating layer on the electrode surface will not be scratched or dust will be generated, and the adjustment roller 301 will wear evenly and have a longer service life; at the same time, since the adjustment roller 301 only makes contact on one side and the other side of the electrode remains open, no closed gap will be formed, so even if the belt is running at high speed, there will be no surface indentation or particulate contamination caused by air or dust.

[0030] In some embodiments, such as Figure 1 and Figure 2 As shown, the first tension adjusting mechanism 3 also includes a lifting cylinder 302, an adjusting roller 303, and... A support sleeve 304 is arranged along the axial direction of the adjusting roller shaft 303 and covers one end thereto; The output end of the lifting cylinder 302 abuts against at least one side of the support sleeve 304, and is configured to drive the support sleeve 304 to move in the vertical direction.

[0031] Specifically, the first tension adjustment mechanism 3 uses a lifting cylinder 302 as its power source. The output end of the lifting cylinder 302 directly acts on the support sleeve 304. The support sleeve 304 surrounds one end of the adjusting roller shaft 303, eliminating the need for gears, connecting rods, or servo motors, thus saving installation space and reducing the number of failure points. At the same time, the linear stroke of the lifting cylinder 302 is linearly related to the electrode path length. During debugging, only a slight adjustment of the air pressure is needed to change the electrode tension within a large range, shortening the adjustment time of the process window. The support sleeve 304 covers the roller shaft axially, keeping the adjusting roller 301 parallel at both ends during lifting and lowering, avoiding transverse wrinkles in the electrode caused by unilateral tilting. When the electrode experiences tension impact, the cylinder can passively retract slightly to absorb the impact force, flatten the peak tension of the electrode, and prevent hidden micro-cracks from appearing on the edge of the electrode.

[0032] For example, in one embodiment, the first tension adjustment mechanism 3 may include a hinge support fixed to the base 1, a connecting rod hinged at one end to the hinge support, and a swing roller connected to the other end of the connecting rod. The roller shaft of the swing roller may be slotted so that the end of the connecting rod connected to it is confined in the slot and can move along the slot. A motor is provided on the hinge support to drive the connecting rod to rotate forward and backward. A damping element is provided to lock the position of the connecting rod in conjunction with a worm gear, thereby realizing the rising and falling effect of the swing roller, thereby applying force to the electrode and changing the movement path of the electrode. The slotted slider structure separates the "rotational motion" and "lifting motion" of the swing roller, and the electrode and the roller surface maintain pure rolling, preventing the generation of dust and scratches.

[0033] For example, in another embodiment, the first tension adjustment mechanism 3 may also adopt a servo slide double roller symmetrical assembly, including a linear guide rail fixed to the base 1, with a leveling wedge between the back of the guide rail and the base 1 to ensure its verticality, and a lead screw and a sliding seat arranged in parallel inside the guide rail, and the lead screw is driven to rotate by a servo motor to realize the lifting operation of the sliding seat; the lead screw is arranged in a concealed manner so that the guide rail, lead screw and sliding seat share the same cavity, reducing the overall width.

[0034] In some embodiments, such as Figure 4 and Figure 5 As shown, the elastic element includes an elastic pad 501 and a spring 502 configured to drive the elastic pad 501 to move. The elastic pad 501 is configured to contact the electrode.

[0035] Specifically, when the elastic pad 501 contacts the electrode, it forms a surface-to-surface fit, resulting in uniform pressure distribution and reduced line contact indentations. The pad and spring 502 can be replaced separately, and the entire mechanism does not need to be disassembled during process switching, making maintenance convenient. The spring 502 is enclosed within the sleeve structure to prevent dust from entering and extend its service life. Furthermore, the elastic pad 501 floats to support the electrode and can automatically retract when there is a sudden change in electrode thickness, preventing the coating from cracking and improving the flatness of the coil end face.

[0036] In some embodiments, such as Figure 4 and Figure 5 As shown, the second tension adjustment mechanism 4 also includes a fixing component. The elastic element is mounted on the fixing component. The fixing component includes a connecting frame 401, a bracket 402, and a force transmission component 403 connected to both. The force transmission component 403 has receiving portions 404 on both sides. The receiving portions 404 are slotted from one end to form a cavity for receiving the elastic element. The connecting frame 401 has at least one top block 405 fixed along its length. The top block 405 is limited in the cavity and connected to the elastic element.

[0037] It is important to emphasize that the cavity of the receiving part 404 includes the part of the elastic element other than the contact surface, preventing dust from adhering to the surface of the element and avoiding changes in its elastic properties. The top block 405 forms a sliding pair with the side wall of the cavity of the receiving part 404. When the element is compressed, the top block 405 always guides along a straight line to avoid uneven load warping and keep the pressure direction always pointing to the winding shaft side. The force between the electrode layers is uniform, preventing the sides from warping. The multiple sets of top blocks 405 on the connecting frame 401 can extend and retract independently, and the pressure of the wide-width electrode segments can be directly adjusted online, shortening the debugging time.

[0038] In some embodiments, such as Figure 4As shown, multiple fixing plates 101 are bolted to the base 1, and are symmetrically arranged in pairs on both sides of the base 1. Each set of fixing plates 101 is recessed from its opposite end to the other end, and the second tension adjustment mechanism 4 is located in the recess of the fixing plate 101.

[0039] Specifically, multiple fixing plates 101 are disposed on the upper surface of the base 1. Each group of fixing plates 101 is arranged along a first direction. Along the first direction, each group of fixing plates 101 is disposed close to both sides of the base 1. The fixing plates 101 are provided with recessed cavities inside. The fixing plates 101 are symmetrical in pairs and connected to the base 1 by bolts, so that a semi-closed groove with one end open (i.e., the recess of the fixing plate 101) is formed between the fixing plates 101 in the same group. Part of the structure of the second tension adjustment mechanism 4 is set in the slot, and its outer shell fits against the slot wall. The recessed slot 102 (i.e., the semi-enclosed slot) provides a natural positioning reference for the second tension adjustment mechanism 4. During installation, it is only necessary to insert it along the slot opening of the recessed slot 102 to complete the positioning, eliminating the step of alignment and shortening the assembly time. The slot wall of the recessed slot 102 surrounds it on three sides, providing multi-angle support. This eliminates the need for rigid reinforcing ribs in the second tension adjustment mechanism 4. When subjected to the reaction force of the electrode plate, it no longer relies on a single cantilever support, distributing the load to the entire plane of the fixed plate 101 and the base 1, thereby enhancing the vibration resistance.

[0040] In some embodiments, such as Figure 2 and Figure 3 As shown, the winding device also includes at least one adjusting ring 305, which is disposed along the outer surface of the adjusting roller 301 and has a degree of freedom to move in the axial direction of the adjusting roller shaft 303, and is used to limit the position of the electrode sheet on the roller surface of the adjusting roller 301.

[0041] Specifically, an adjusting ring 305 is fitted onto the outer surface of the adjusting roller 301. The adjusting ring 305 and the roller surface of the adjusting roller 301 are in clearance fit. It can move left and right along the axial direction of the adjusting roller 301 under external force, or it can be positioned by a set screw or quick-release lock. The outer diameter of the adjusting ring 305 is larger than the roller surface of the adjusting roller 301, forming a flange. The edge of the electrode sheet can be limited by abutting against the inner side of the flange. The adjusting ring 305 has low sliding resistance. When changing to electrode sheets of different widths, it can be directly pushed to achieve real-time alignment without stopping the machine to disassemble the entire adjusting roller 301. The inner wall of the flange contacts the edge line of the electrode sheet to prevent damage to the coating and prevent the electrode sheet from deviating.

[0042] In some embodiments, the adjusting ring 305 is connected to a push block 306, which is embedded and fixed to at least one end face of the adjusting ring 305. The push block 306 protrudes outward along the radial direction of the adjusting ring 305 to form a push post 307 for transmitting external force.

[0043] Specifically, a push block 306 is embedded on the side of the adjusting ring 305 facing away from the electrode. The outer edge of the push block 306 protrudes radially outward into a column shape, forming a push column 307 protruding from the adjusting ring 305. In other words, the push block 306 protrudes into a column shape on the side of the adjusting ring 305 facing away from the adjusting roller 301 to form a push column 307 protruding from the adjusting ring 305. The operator can slide the adjusting ring 305 along the axial direction of the adjusting roller 301 by pushing the push column 307 without touching the roller surface or the electrode.

[0044] In some embodiments, such as Figure 1 As shown, the winding mechanism includes a winding roller 201, a bearing seat 202, and a take-up motor 203. The bearing seat 202 is fixed on the base 1, and the winding roller 201 is rotatably mounted on the bearing seat 202. The base 1 protrudes outward from one side wall, and the take-up motor 203 is fixed on the protruding part of the base 1 and is connected to the winding roller 201 for transmission.

[0045] It should be noted that the winding mechanism adopts a linear arrangement: the bearing seat 202 is first locked on the plane of the base 1 (i.e., the upper surface of the base 1), the winding roller 201 is cantilevered into the bearing hole of the bearing seat 202, and a boss extends outward from the side wall of the base 1. The winding motor 203 is horizontally mounted on the boss, and the motor output shaft is coaxially connected with the winding roller 201. The boss and the base 1 are integrally formed, and there is no need to weld an additional mounting bracket for mounting the winding motor 203. The motor's own weight is directly transmitted to the base 1 through the boss, which reduces elastic swaying under high-speed winding, shortens the transmission chain length, and reduces power loss points.

[0046] In some embodiments, such as Figure 1 As shown, the winding device also includes at least one guide roller 6, which is disposed on one side of the first tension adjustment mechanism 3 and / or inside the first tension adjustment mechanism 3.

[0047] Specifically, one or more guide rollers 6 can be added to the inlet side, outlet side, or empty space inside the first tension adjustment mechanism 3. The guide rollers 6 can lift the electrode sheet away from the equipment frame in advance, and convert the simple bending of the unidirectional roller into multi-roller circulating storage, so that the electrode sheet storage amount increases under the same lifting stroke, and the tension adjustment response is stable.

[0048] As an example, the first tension adjusting mechanism 3 is a single unit, and a roller 6 is provided on at least one side of the first tension adjusting mechanism 3 along the belt travel direction of the electrode. As another example, the first tension adjusting mechanism 3 includes two parts arranged along the belt travel direction of the electrode, with the roller 6 located between the two parts of the first tension adjusting mechanism 3.

[0049] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An electrode winding device, characterized in that, include: Matrix; A winding mechanism fixed to the substrate extends along the width direction of the electrode sheet and is used to wind up the electrode sheet; A first tension adjustment mechanism, along the electrode conveying direction, is located upstream of the winding mechanism. The first tension adjustment mechanism is configured to drive the electrode to move away from its initial conveying path, thereby changing the length of the electrode conveying path and adjusting the tension of the electrode. The second tension adjustment mechanism is located along the electrode travel direction and is disposed on one side of the winding mechanism. The second tension adjustment mechanism is configured to apply a force to the electrode toward the radial side of the winding mechanism. The second tension adjustment mechanism also includes an elastic element for applying force to the electrode. When the elastic element contacts the electrode, there is a proportionality coefficient between the change in the applied force and the change in the number of winding turns. The proportionality coefficient is positively correlated with the length of the electrode transport path.

2. The electrode winding device according to claim 1, characterized in that, The first tension adjustment mechanism includes an adjustment roller, which is rotatable about its own axis, and the outer surface of the adjustment roller can abut against one side of the electrode sheet.

3. The electrode winding device according to claim 2, characterized in that, The first tension adjustment mechanism also includes a lifting cylinder, an adjusting roller, and, A support sleeve is provided along the axial direction of the adjusting roller shaft and covers one end thereto; The output end of the lifting cylinder abuts against at least one side of the support sleeve, and is configured to drive the support sleeve to move in the vertical direction.

4. The electrode winding device according to claim 1, characterized in that, The elastic element includes an elastic pad and a spring configured to drive the elastic pad to move, the elastic pad being configured to contact the electrode.

5. The electrode winding device according to claim 1, characterized in that, The second tension adjustment mechanism further includes a fixing component. The elastic element is mounted on the fixing component. The fixing component includes a connecting frame, a support, and a force transmission component connected to both. The force transmission component has receiving portions on both sides. The receiving portions are slotted from one end to form a cavity for accommodating the elastic element. The connecting frame has at least one top block fixed along its length. The top block is positioned in the cavity and connected to the elastic element.

6. The electrode winding device according to claim 1, characterized in that, Multiple fixing plates are bolted to the base, arranged symmetrically in pairs on the base. Each pair of fixing plates is recessed from its opposite end to the other end, and the second tension adjustment mechanism is located at the recess of the fixing plate.

7. The electrode winding device according to claim 2, characterized in that, The winding device further includes at least one adjusting ring, which is disposed along the outer surface of the adjusting roller and has a degree of freedom to move in the axial direction of the adjusting roller, thereby restricting the position of the electrode sheet on the roller surface of the adjusting roller.

8. The electrode winding device according to claim 7, characterized in that, The adjusting ring is connected to a pushing block, which is embedded and fixed to at least one end face of the adjusting ring. The pushing block protrudes outward along the radial direction of the adjusting ring to form a pushing column for transmitting external force.

9. The electrode winding device according to claim 1, characterized in that, The winding mechanism includes a winding roller, a bearing seat, and a take-up motor. The bearing seat is fixed to the base, and the winding roller is rotatably mounted on the bearing seat. The base protrudes outward from one side wall, and the take-up motor is fixed to the protruding part of the base and is connected to the winding roller in a driving connection.

10. The electrode winding device according to claim 1, characterized in that, The winding device further includes at least one guide roller, disposed on one side of the first tension adjustment mechanism and / or inside the first tension adjustment mechanism.

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