Pole piece winding test apparatus

Abstract

The application discloses a pole piece winding test device, which comprises a base, a winding mechanism, a needle distance adjusting mechanism and a rotating driving mechanism. The winding mechanism comprises a mounting part rotatably arranged on the base and two winding needles arranged at the two sides of the center of the mounting part. The two winding needles can clamp a pole piece material therebetween, and the winding needles are used for winding the pole piece material. The needle distance adjusting mechanism is arranged on the base and is used for driving the two winding needles to move towards or away from each other. The rotating driving mechanism is connected with the mounting part and is used for driving the mounting part to rotate, so that the pole piece material clamped between the two winding needles is alternately wound on the outer sides of the two winding needles. The pole piece winding test device has simple structure and is easy to operate, and is suitable for most pole piece winding test scenes.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing equipment, and in particular to an electrode winding test device. Background Technology

[0002] Electrode winding testing equipment is used in the battery industry. Battery cells are usually formed by stacking or winding positive electrode sheets, negative electrode sheets, and separators between them. In laboratory research and development, small-scale testing and process windows, customer sample delivery and prototyping, and cell failure analysis, only a few to dozens of turns of electrode winding structure are often required. At this time, traditional fully automatic large winding machines have the disadvantages of large footprint, high price, long changeover time, and serious electrode waste. On the other hand, simple tooling that relies entirely on manual shaking has problems such as inaccurate control of the winding needle spacing, large fluctuations in electrode tension, and poor repeatability, which are difficult to meet the needs of electrode winding testing in the research and development stage. Utility Model Content

[0003] The main objective of this application is to propose an electrode winding testing device, aiming to provide an efficient electrode winding testing device to meet the needs of electrode winding testing.

[0004] To achieve the above objectives, this application proposes an electrode winding testing device, comprising: Base; The winding mechanism includes a mounting component rotatably disposed on the base and winding needles spaced apart on both sides of the center of the mounting component. Electrode sheet material can be clamped between the two winding needles, and the winding needles are used to wind the electrode sheet material. A needle spacing adjustment mechanism is provided on the machine base to drive the two coiled needles to move towards or away from each other; A rotation drive mechanism, connected to the mounting component, is used to drive the mounting component to rotate so that the electrode sheet material held between the two coil needles is alternately wound around the outside of the two coil needles.

[0005] In some embodiments, the stitch length adjustment mechanism includes: A first adjustment component is disposed at one end of the two coiled needles; The second adjustment component is disposed at the other end of the two coiled needles; The first adjustment component and / or the second adjustment component are used to drive the two coiled needles to move toward or away from each other.

[0006] In some embodiments, an adjustment block protrudes from one end of the winding needle near the first adjustment component; The first adjustment component includes a first driving member and a locking head disposed at the output end of the first driving member. The locking head has a locking cavity at one end facing the winding needle, into which the adjustment block can extend. The locking cavity includes an opening, a limiting cavity communicating with the opening, and a clamping cavity disposed on the side of the limiting cavity away from the opening. The width of the clamping cavity is smaller than the width of the limiting cavity, and the limiting cavity and the clamping cavity are transitioned by a slope. The first driving member is used to drive the locking head to move along the axial direction of the needle coil, so that the adjusting block slides along the inclined surface to the clamping cavity or the limiting cavity, or causes the adjusting block to disengage from the opening.

[0007] In some embodiments, the electrode winding test equipment further includes an adapter seat disposed on the base, the adapter seat having an accommodating cavity; the winding mechanism includes two sliding blocks, one end of the mounting member is slidably connected to the accommodating cavity and rotatably connected to the accommodating cavity, and the other end of the mounting member has a limiting hole; one end of each sliding block is connected to the end of the corresponding winding needle facing away from the first adjusting component, the sliding block is slidably disposed in the limiting hole, and the mating surface of the sliding block in contact with the inner wall of the limiting hole is a wedge surface; The second adjustment component includes a second drive member disposed on the base. The second drive member is used to drive the mounting member to slide axially relative to the adapter seat, so that the wedge surface of the limiting hole presses against the wedge surface of the sliding block, thereby driving the two winding needles to move towards each other.

[0008] In some embodiments, the sliding block has a wedge surface in the middle, one end of the sliding block facing away from the first adjusting component is exposed in the limiting hole, a mounting block is provided on the periphery of the end of the sliding block exposed in the limiting hole, and a reset spring is provided between the mounting block and the mounting component.

[0009] In some embodiments, the second driving member includes a driving cylinder, an intermediate connecting member, and a rotating cam. One end of the intermediate connecting member is connected to the output end of the driving cylinder, and the rotating cam is rotatably disposed at the other end of the intermediate connecting member. The rotating cam abuts against one end of the mounting member facing the first adjusting component and rotates with the rotation of the mounting member.

[0010] In some embodiments, the rotation drive mechanism includes a handwheel, a bearing housing, and a drive shaft. The bearing housing is spaced apart on the side of the adapter facing away from the mounting member, and the adapter is mounted on the bearing housing. The drive shaft is rotatably passed through the middle of the bearing housing. One end of the drive shaft extends into the receiving cavity to connect to the mounting member, and the other end is exposed on the other side of the bearing housing to connect to the handwheel.

[0011] In some embodiments, the electrode winding test equipment further includes a mounting frame disposed on the base, a roll mounting mechanism disposed on the mounting frame, and a roll tensioning mechanism. The roll mounting mechanism is located on the upper side of the winding mechanism and is used to mount the electrode roll. The roll tensioning mechanism is disposed between the winding mechanism and the roll mounting mechanism and is used to wind and tension the electrode sheet.

[0012] In some embodiments, the roll mounting mechanism includes an air shaft rotatably disposed on the mounting frame, the air shaft being used to mount the electrode mother roll, the air shaft being radially expanded or contracted to expand or loosen the electrode mother roll; One end of the air shaft is connected to a damper, which is used to provide rotational damping force to the air shaft.

[0013] In some embodiments, the roll tensioning mechanism includes at least one fixed roller, at least one adjustable roller, a fixing block, and an elastic element; The fixed roller shaft is rotatably mounted on the mounting frame; The adjustable roller shaft is slidably disposed on the mounting frame, and the fixing block is disposed on the side of the adjustable roller shaft facing away from the fixed roller shaft and is connected to the adjustable roller shaft through the elastic element; The elastic element is used to provide a force that moves the adjustable roller away from the fixed roller.

[0014] This electrode winding testing equipment features a winding mechanism with two coils symmetrically spaced around the mounting component, centered on the mounting element. The coils can clamp the electrode material between them. A needle spacing adjustment mechanism allows the two coils to move towards or away from each other, adjusting the distance between them to accommodate rapid changes in electrode thickness and process. A rotation drive mechanism further rotates the mounting component, causing the two coils to rotate and the electrode material to be alternately wound around the outside of the two coils, forming an electrode winding structure. This electrode winding testing equipment achieves high-efficiency electrode winding testing, with a simple structure and easy operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an electrode winding test device in one embodiment of the present invention; Figure 2 for Figure 1 A partial structural schematic diagram of the intermediate electrode winding test equipment; Figure 3 for Figure 1 Top view of part of the structure of the intermediate electrode winding test equipment; Figure 4 for Figure 3 Cross-sectional view at point AA; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Figure 6 for Figure 4 A magnified view of a section at point B in the middle; Figure 7 This is a schematic diagram of the sliding block and mounting component in one embodiment of the present invention; Figure 8 This is a schematic diagram of the sliding block in one embodiment of the present invention; Figure 9 This is a schematic diagram of the mounting component in one embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the air shaft and damper in one embodiment of the present invention. Detailed Implementation

[0016] The solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only the first cosmetic packaging bag embodiment in this application, and not all embodiments. Based on the embodiments in 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.

[0017] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0018] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0019] Furthermore, the use of terms such as "first" and "second" in this application is 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 as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0020] This application discloses an electrode winding testing device, which, in a preferred embodiment, refers to... Figure 1 The electrode winding test equipment includes: Base 1; The winding mechanism 2 includes a mounting member 21 rotatably mounted on the base and winding needles 22 spaced apart on both sides of the center of the mounting member 21. The electrode sheet material can be clamped between the two winding needles 22, and the winding needles 22 are used to wind the electrode sheet material. The needle spacing adjustment mechanism 3 is set on the machine base 1 and is used to drive the two coil needles 22 to move towards or away from each other; The rotating drive mechanism 4 is connected to the mounting component 21 to drive the mounting component 21 to rotate, so that the electrode sheet material held between the two coil needles 22 is alternately wound around the outside of the two coil needles 22.

[0021] In the electrode winding test equipment proposed in this application, the winding mechanism 2 takes the mounting part 21 as the central carrier, and two winding needles 22 are symmetrically arranged on both sides of the center of the mounting part 21. The distance between the two winding needles 22 is adjustable. The needle spacing adjustment mechanism 3 can drive the two winding needles 22 to move towards or away from each other to adjust the distance between the winding needles 22. The needle spacing adjustment mechanism 3 can be an automatic drive device such as a motor or a cylinder. The rotation drive mechanism 4 is used to drive the mounting part 21 to rotate, so that the mounting part 21 and the two winding needles 22 arranged on it rotate around the rotation axis of the mounting part 21, so that the electrode sheet material held between the two winding needles 22 is alternately wound around the outside of the two winding needles 22.

[0022] Specifically, the working process of this application can be divided into three stages: In the first stage, the needle pitch adjustment mechanism 3 drives the two coil needles 22 to move towards each other to a preset distance, forming a clamping space that adapts to the thickness of the current electrode sheet material; In the second stage, after placing one end of the electrode sheet material between the two coil needles 22, the needle spacing adjustment mechanism 3 drives the two coil needles 22 to move towards each other to complete the clamping of the electrode sheet material. In the third stage, the rotating drive mechanism 4 drives the mounting part 21 and the two coil needles 22 to rotate as a whole. The clamped electrode sheet material is then alternately wound around the outside of the two coil needles 22 and gradually forms an electrode winding structure.

[0023] This application employs a winding mechanism 2 centered on the mounting component 21, with two symmetrically spaced coil needles 22 positioned between it. The coil needles 22 can clamp the electrode sheet roll. A needle spacing adjustment mechanism 3 drives the two coil needles 22 to move towards or away from each other, adjusting the distance between them to accommodate rapid changes in electrode sheet thickness and process. A rotation drive mechanism 4 drives the mounting component 21 to rotate, causing the two coil needles 22 to rotate and alternately wind the electrode sheet around the outside of the two coil needles 22, forming an electrode sheet winding structure. This electrode sheet winding testing equipment achieves high-efficiency electrode sheet winding testing, with a simple structure and easy operation.

[0024] Reference Figure 1 and Figure 2 In some embodiments, the stitch pitch adjustment mechanism 3 proposed in this application includes: The first adjustment component 31 is located at one end of the two coiled needles 22; The second adjustment component 32 is located at the other end of the two coil needles 22; The first adjustment component 31 and / or the second adjustment component 32 are used to drive the two coil needles 22 to move towards or away from each other.

[0025] The needle spacing adjustment mechanism 3 proposed in this embodiment forms a structure with independent or coordinated driving at both ends by setting a first adjustment component 31 and a second adjustment component 32 at both ends of the coiled needle 22, so that the two coiled needles 22 can move radially towards each other or away from each other under the action of the first adjustment component 31 and / or the second adjustment component 32, thereby completing the adjustment of the needle spacing 22.

[0026] Understandably, the first adjustment component 31 and the second adjustment component 32 can operate independently or simultaneously: When only the first adjustment component 31 is activated, the head end of the two coiled needles 22 can be pressed or released on one side. When only the second adjustment component 32 is activated, the tail end of the two coiled needles 22 can be pressed or released on one side. When the first adjustment component 31 and the second adjustment component 32 work together, the forces at both ends compensate each other, so that the electrode sheet material held by the two coil needles 22 is subjected to uniform clamping force along the entire axial length.

[0027] This application, by setting up a needle spacing adjustment mechanism 3 that can work independently or collaboratively at both ends, enables the needle coil 22 to have a larger adjustment range, higher precision, and better repeatability, fully adapting to the testing needs of frequent model changes, varying electrode thicknesses, and the need to verify different clamping effects.

[0028] Reference Figures 2 to 5 In some embodiments, reference is made to Figure 5 In this embodiment of the application, the winding needle 22 has an adjustment block 221 protruding at one end near the first adjustment component 31; Reference Figure 4 and Figure 5The first adjustment component 31 includes a first driving member 311 and a locking head 312 disposed at the output end of the first driving member 311. The locking head 312 is provided with a locking cavity at one end facing the winding needle 22, into which the adjustment block 221 can extend. The locking cavity includes an opening 3121, a limiting cavity 3122 communicating with the opening 3121, and a clamping cavity 3123 disposed on the side of the limiting cavity 3122 away from the opening 3121. The width of the clamping cavity 3123 is smaller than the width of the limiting cavity 3122, and the limiting cavity 3122 and the clamping cavity 3123 are transitioned by a slope. The first driving member 311 is used to drive the locking head 312 to move along the axial direction of the coil needle 22, so that the adjusting block 221 slides along the inclined surface to the clamping cavity 3123 or the limiting cavity 3122, or so that the adjusting block 221 disengages from the opening 3121.

[0029] In this embodiment, when the locking head 312 is pushed along the axial direction of the coil needle 22 towards the coil needle 22, the adjusting block 221 first enters the locking cavity through the opening 3121 and contacts the limiting cavity 3122; as it continues to advance, the adjusting block 221 enters the clamping cavity 3123. Since the width of the clamping cavity 3123 is smaller than that of the limiting cavity 3122, the distance between the two coil needles 22 gradually decreases during the movement of the adjusting block 221 from the limiting cavity 3122 through the inclined surface to the clamping cavity 3123, until the adjusting block 221 is completely located in the clamping cavity 3123, thereby achieving reliable clamping and spacing locking of the head of the coil needle 22. When the clamping head 312 retracts axially in the opposite direction, the adjusting block 221 slides from the clamping cavity 3123 to the limiting cavity 3122 via the inclined surface, and the distance between the two coil needles 22 gradually increases, thus releasing the head; when it continues to retract to the limit position, the adjusting block 221 can completely disengage from the opening 3121 from the clamping cavity, thus completely releasing the head of the coil needle 22, which facilitates quick needle replacement or removal of the already wound electrode coil.

[0030] Reference Figures 2 to 4 ,as well as Figure 6 In some embodiments, the electrode winding test device proposed in this application further includes an adapter 5 disposed on the base 1, the adapter 5 having a receiving cavity 50; the winding mechanism 2 includes two sliding blocks 23, one end of the mounting member 21 is slidably connected to the receiving cavity 50 and rotatably connected to the receiving cavity 50, and the other end of the mounting member 21 has a limiting hole 210; one end of each sliding block 23 is connected to the end of the corresponding winding needle 22 facing away from the first adjusting component 31, the sliding block 23 is slidably inserted through the limiting hole 210, and the mating surface of the sliding block 23 in contact with the inner wall of the limiting hole 210 is a wedge surface 100; The second adjustment component 32 includes a second drive member 320 disposed on the base 1. The second drive member 320 is used to drive the mounting member 21 to slide axially relative to the adapter 5 so that the wedge surface 100 of the limiting hole 210 presses the wedge surface 100 of the sliding block 23, thereby driving the two coil needles 22 to move towards each other.

[0031] When the second driving component 320 drives the mounting component 21 to slide axially toward the coil needle 22 (i.e. away from the adapter 5), the limiting hole 210 at the other end of the mounting component 21 moves forward accordingly. The wedge surface 100 on the inner wall of the limiting hole 210 synchronously presses the outer wedge surface 100 of the two sliding blocks 23. Due to the symmetrical arrangement of the two sliding blocks 23, the pressing force acts on the two sliding blocks 23 radially inward, causing them to drive their respective corresponding coil needles 22 to move toward each other. The distance between the tails of the coil needles 22 gradually decreases until the preset pressing position is reached, thus achieving synchronous locking of the tails on both sides. When the second driving member 320 drives the mounting member 21 to slide in the opposite direction along the axial direction (towards the adapter 5), the wedge surface 100 of the limiting hole 210 gradually releases the pressure on the sliding block 23, and the distance between the two sliding blocks 23 increases accordingly, thus releasing the tail.

[0032] In some embodiments, the coil needle 22 and the sliding block 23 may be a single integrally formed part, or two combined parts joined by means of insertion, snap-fit, bonding, etc., without limitation.

[0033] Reference Figures 6 to 9 In a preferred embodiment, the sliding block 23 proposed in this application is provided with a wedge surface 100 in the middle, and one end of the sliding block 23 facing away from the first adjustment component 31 is exposed in the limiting hole 210. A mounting block 231 is provided on the periphery of the end of the sliding block 23 exposed in the limiting hole 210, and a reset spring 6 is provided between the mounting block 231 and the mounting component 21.

[0034] In this embodiment, a mounting block 231 is provided at the exposed end of the sliding block 23, and a return spring 6 is arranged between the mounting block 21 and the mounting member 21. This provides a continuous outward radial return force to the sliding block 23, so that the tails of the two coiled needles 22 can automatically open to the maximum spacing when the second adjustment component 32 is in the released state. At the same time, it ensures that the needle spacing adjustment process is reversible, repeatable, and has good consistency of action. Specifically: When the second driving member 320 drives the mounting member 21 to move, so that the wedge surface 100 of the limiting hole 210 releases the squeezing force on the sliding block 23, the return spring 6 immediately releases the stored elastic potential energy and actively pushes the mounting block 231 and the sliding block 23 connected to it to move, so that the outer wedge surface 100 of the sliding block 23 slides along the inner wedge surface 100 of the limiting hole 210. The two sliding blocks 23 synchronously drive the tail of the coil needle 22 to move in opposite directions until the return spring 6 is fully extended or the sliding block 23 reaches the widest part of the limiting hole 210, and the distance between the tails of the coil needle 22 automatically returns to the maximum opening state. When the second driving member 320 drives the mounting member 21 to advance axially again, the wedge surface 100 of the limiting hole 210 re-presses the wedge surface 100 of the sliding block 23, forcing the sliding block 23 to overcome the elastic force of the return spring 6 and move towards the center. At the same time, the return spring 6 is compressed to store energy, reserving the return force for the next release action.

[0035] Reference Figure 4 In a preferred embodiment, the second driving member 320 proposed in this application includes a driving cylinder 321, an intermediate connecting member 322, and a rotating cam 323. One end of the intermediate connecting member 322 is connected to the output end of the driving cylinder 321, and the rotating cam 323 is rotatably disposed at the other end of the intermediate connecting member 322. The rotating cam 323 can abut against the end of the mounting member 21 facing the first adjusting component 31 and rotates with the rotation of the mounting member 21.

[0036] In this embodiment, when the piston rod of the drive cylinder 321 extends, the axial thrust is transmitted to the rotating cam 323 through the intermediate connector 322. The outer circumference of the rotating cam 323 always abuts against the end face of the mounting part 21 facing the first adjustment component 31. Since the rotating cam 323 can rotate freely around its own axis, when the mounting part 21 rotates at high speed with the winding mechanism 2, the rotating cam 323 only rotates accordingly, thereby transmitting the axial thrust of the cylinder to the rotating mounting part 21 completely with extremely low friction loss and almost no wear, forcing the mounting part 21 to slide axially toward the winding needle 22, completing the pressing action of the tail wedge surface 100. When the piston rod of the drive cylinder 321 retracts, the rotating cam 323 retracts with the intermediate connector 322, the end face of the mounting part 21 loses the axial thrust, and the mounting part 21 is axially reset under the action of the return spring 6, and the tail winding needle 22 opens synchronously.

[0037] Reference Figure 2 In a preferred embodiment, the rotation drive mechanism 4 proposed in this application includes a handwheel 41, a bearing seat 42, and a drive shaft 43. The bearing seat 42 is spaced apart on the side of the adapter 5 facing away from the mounting member 21, and the adapter 5 is mounted on the bearing seat 42. The drive shaft 43 is rotatably passed through the middle of the bearing seat 42. One end of the drive shaft 43 extends into the receiving cavity 50 to connect to the mounting member 21, and the other end is exposed on the other side of the bearing seat 42 to connect with the handwheel 41.

[0038] In this embodiment, the bearing seat 42 is installed on the machine base 1. A bearing can be provided in the middle of the bearing seat 42. The bearing is used for the transmission shaft 43 to rotatably pass through. One end of the transmission shaft 43 extends into the receiving cavity 50 of the adapter seat 5 and is connected to the mounting part 21 by a circumferentially fixed and axially sliding connection method such as spline, spline sleeve or keyway. The other end is fixedly connected to the handwheel 41. When the operator cranks the handwheel 41 in the forward or reverse direction, the rotational torque is transmitted along the path of the handwheel 41, the drive shaft 43, and the mounting piece 21, driving the mounting piece 21 together with the two coil needles 22 and the sliding block 23 on it to rotate synchronously around the central axis, thereby realizing the alternating winding of the electrode sheet material. Since the drive shaft 43 and the mounting part 21 are connected in an axially sliding and circumferentially fixed manner, when the second drive member 320 pushes the mounting part 21 to slide axially for tail stitch pitch adjustment, the mounting part 21 can slide freely relative to the drive shaft 43 without affecting the continuous transmission of rotational torque. This ensures that the two degrees of freedom of winding rotation and stitch pitch adjustment are completely decoupled and do not interfere with each other. For example, a thrust bearing assembly is fixed at the end of the drive shaft 43. The inner ring of the thrust bearing is fixed to the drive shaft 43, and the outer ring is fixed to the end face of the mounting part 21. When the mounting part 21 rotates, the outer ring moves with it, and the inner ring rotates with the drive shaft 43. The bearing itself rolls, and the axial coupling is completely decoupled. The mounting part 21 can slide arbitrarily relative to the drive shaft 43, while bearing the axial force during stitch pitch adjustment.

[0039] Reference Figure 2 In a preferred embodiment, the electrode winding test equipment proposed in this application further includes a mounting frame 11 disposed on the base 1, a roll mounting mechanism 7 disposed on the mounting frame 11, and a roll tensioning mechanism 8. The roll mounting mechanism 7 is located on the upper side of the winding mechanism 2 and is used to install the electrode roll. The roll tensioning mechanism 8 is disposed between the winding mechanism 2 and the roll mounting mechanism 7 and is used to wind and tension the electrode roll.

[0040] In this embodiment, the coil mounting mechanism 7 uses a radially expandable air shaft 71 to clamp the electrode coil onto the mounting frame 11, and provides constant and adjustable rotational resistance to the master coil through a damper 9 (magnetic powder damper 9 or adjustable friction damper 9) connected at one end, to prevent over-unwinding due to inertia or sudden drop in tension during unwinding. The coil tensioning mechanism 8 is located on the electrode running channel between the air expansion shaft 71 and the winding mechanism 2. It allows the electrode sheet to pass through in an S-shaped or Ω-shaped winding path, and can tension the electrode sheet to compensate for tension fluctuations generated during the winding process.

[0041] Reference Figure 2 and Figure 10 In a preferred embodiment, the roll mounting mechanism 7 proposed in this application includes an air expansion shaft 71 rotatably disposed on the mounting frame 11. The air expansion shaft 71 is used to mount the electrode mother roll. The air expansion shaft 71 can be radially tightened or contracted to tighten or loosen the electrode mother roll. One end of the air shaft 71 is connected to a damper 9, which is used to provide rotational damping force for the air shaft 71.

[0042] In this embodiment, after the air expansion shaft 71 is inserted into the inner hole of the paper tube of the electrode roll, air is injected into the internal air bladder / stretcher through a manual valve or foot valve, driving the wedge block or stretching tile to expand radially and evenly outward, thus opening the inner wall of the paper tube and achieving axial fixation. After deflating, the air expansion shaft 71 quickly retracts to its minimum diameter, and the electrode mother roll can be easily removed. One end (or both ends) of the air expansion shaft 71 is rigidly connected to the damper 9 through a coupling. The damper 9 (which can be a magnetic powder damper 9, an adjustable friction damper 9, or a servo motor torque mode) outputs a constant damping torque according to the set value. This torque acts in the opposite direction on the air expansion shaft 71, so that the electrode mother roll is always subjected to a stable back tension when it is pulled and unwound by the winding mechanism 2, effectively suppressing the phenomenon of excessive inertia or sudden tension drop caused by the large rotational inertia of the electrode mother roll during start-up, shutdown, or speed change.

[0043] Furthermore, please continue to refer to Figure 2 The roll tensioning mechanism 8 proposed in this application embodiment includes at least one fixed roller shaft 81, at least one adjustable roller shaft 82, a fixing block 83, and an elastic element 84; The fixed roller shaft 81 is rotatably mounted on the mounting frame 11; The adjustable roller shaft 82 is slidably mounted on the mounting frame 11, and the fixing block 83 is located on the side of the adjustable roller shaft 82 facing away from the fixed roller shaft 81 and is connected to the adjustable roller shaft 82 through the elastic element 84. The elastic element 84 is used to provide a force that moves the adjustable roller 82 away from the fixed roller 81.

[0044] In this embodiment, the electrode sheet material passes through the fixed roller shaft 81 and the adjustable roller shaft 82 in an S-shaped or Ω-shaped path. The adjustable roller shaft 82 can be slidably connected to the mounting frame 11 via a slider. One end of the elastic element 84 (optionally, the elastic element 84 can be a tension spring, a compression spring, or a constant force spring) is fixed to the fixing block 83 on the mounting frame 11, and the other end is connected to the adjustable roller shaft 82 (or its slider or slide block). The elastic element 84 always applies a spring force away from the fixed roller shaft 81 to the adjustable roller shaft 82, so that the electrode sheet material between the adjustable roller shaft 82 and the fixed roller shaft 81 always tends to be tensioned. When the downstream winding mechanism 2 suddenly accelerates, causing the electrode tension to increase, the adjustable roller 82, under the action of tension, overcomes the elastic force of the elastic element 84 and slides slightly towards the fixed roller 81, releasing the length of the electrode in the buffer circuit; conversely, when the tension drops instantaneously, the elastic element 84 keeps pulling the adjustable roller 82 away from the fixed roller 81, so as to always maintain the tension of the electrode material.

[0045] In some embodiments, since the electrode winding structure is formed by stacking and winding a positive electrode, a separator, and a negative electrode, three winding installation mechanisms 7 can be provided. The three winding installation mechanisms 7 are respectively used to install the positive electrode master roll, the negative electrode master roll, and the separator master roll, and each winding installation mechanism 7 is provided with a corresponding winding tension mechanism 8.

[0046] In some embodiments, two spaced-apart correction rollers may be provided between the coil tensioning mechanism 8 and the winding mechanism 2. The space between the two correction rollers forms a space for the electrode sheet material to pass through. After the electrode sheet material extends from the electrode master roll, it is sequentially wound around the fixed roller shaft 81, the adjustable roller shaft 82, and the correction rollers, and then extends between the two winding needles 22. It can be understood that, in order to further enhance the tensioning effect of the adjustable roller shaft 82, one or more fixed roller shafts 81 may be provided between the adjustable roller shaft 82 and the correction rollers.

[0047] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. An electrode winding testing device, characterized in that, include: Base; The winding mechanism includes a mounting component rotatably disposed on the base and winding needles spaced apart on both sides of the center of the mounting component. Electrode sheet material can be clamped between the two winding needles, and the winding needles are used to wind the electrode sheet material. A needle spacing adjustment mechanism is provided on the machine base to drive the two coiled needles to move towards or away from each other; A rotation drive mechanism is connected to the mounting component to drive the mounting component to rotate, so that the electrode sheet material held between the two coil needles is alternately wound around the outside of the two coil needles.

2. The electrode winding testing equipment according to claim 1, characterized in that, The needle spacing adjustment mechanism includes: A first adjustment component is disposed at one end of the two coiled needles; The second adjustment component is disposed at the other end of the two coiled needles; The first adjustment component and / or the second adjustment component are used to drive the two coiled needles to move toward or away from each other.

3. The electrode winding testing equipment according to claim 2, characterized in that, The winding needle has an adjustment block protruding at one end near the first adjustment component; The first adjustment component includes a first driving member and a locking head disposed at the output end of the first driving member. The locking head has a locking cavity at one end facing the winding needle, into which the adjustment block can extend. The locking cavity includes an opening, a limiting cavity communicating with the opening, and a clamping cavity disposed on the side of the limiting cavity away from the opening. The width of the clamping cavity is smaller than the width of the limiting cavity, and the limiting cavity and the clamping cavity are transitioned by a slope. The first driving member is used to drive the locking head to move along the axial direction of the needle coil, so that the adjusting block slides along the inclined surface to the clamping cavity or the limiting cavity, or causes the adjusting block to disengage from the opening.

4. The electrode winding testing equipment according to claim 2, characterized in that, The electrode winding test equipment further includes an adapter seat disposed on the base, the adapter seat having an accommodating cavity; the winding mechanism includes two sliding blocks, one end of the mounting member is slidably connected to the accommodating cavity and rotatably connected to the accommodating cavity, the other end of the mounting member has a limiting hole; one end of each sliding block is connected to the end of the corresponding winding needle facing away from the first adjusting component, the sliding block is slidably inserted through the limiting hole, and the mating surface of the sliding block in contact with the inner wall of the limiting hole is a wedge surface; The second adjustment component includes a second drive member disposed on the base. The second drive member is used to drive the mounting member to slide axially relative to the adapter seat, so that the wedge surface of the limiting hole presses against the wedge surface of the sliding block, thereby driving the two winding needles to move towards each other.

5. The electrode winding testing equipment according to claim 4, characterized in that, The sliding block has a wedge surface in the middle, and one end of the sliding block facing away from the first adjustment component is exposed in the limiting hole. A mounting block is protruding on the periphery of the end of the sliding block exposed in the limiting hole, and a reset spring is provided between the mounting block and the mounting component.

6. The electrode winding testing equipment according to claim 4, characterized in that, The second driving component includes a driving cylinder, an intermediate connecting member, and a rotating cam. One end of the intermediate connecting member is connected to the output end of the driving cylinder, and the rotating cam is rotatably disposed at the other end of the intermediate connecting member. The rotating cam can abut against the end of the mounting member facing the first adjusting component and rotates with the rotation of the mounting member.

7. The electrode winding testing equipment according to claim 4, characterized in that, The rotation drive mechanism includes a handwheel, a bearing housing, and a drive shaft. The bearing housing is spaced apart on the side of the adapter facing away from the mounting component, and the adapter is mounted on the bearing housing. The drive shaft is rotatably inserted through the middle of the bearing housing. One end of the drive shaft extends into the receiving cavity to connect to the mounting component, and the other end protrudes from the other side of the bearing housing to connect to the handwheel.

8. The electrode winding testing equipment according to claim 1, characterized in that, The electrode winding test equipment further includes a mounting frame disposed on the base, a winding material mounting mechanism disposed on the mounting frame, and a winding material tensioning mechanism. The winding material mounting mechanism is located on the upper side of the winding mechanism and is used to mount the electrode material. The winding material tensioning mechanism is disposed between the winding mechanism and the winding material mounting mechanism and is used to wind and tension the electrode material.

9. The electrode winding testing equipment according to claim 8, characterized in that, The coil mounting mechanism includes an air shaft rotatably mounted on the mounting frame. The air shaft is used to mount the electrode mother roll. The air shaft can be radially expanded or contracted to expand or loosen the electrode mother roll. One end of the air shaft is connected to a damper, which is used to provide rotational damping force to the air shaft.

10. The electrode winding testing equipment according to claim 8, characterized in that, The coil tensioning mechanism includes at least one fixed roller shaft, at least one adjustable roller shaft, a fixing block, and an elastic element; The fixed roller shaft is rotatably mounted on the mounting frame; The adjustable roller shaft is slidably disposed on the mounting frame, and the fixing block is disposed on the side of the adjustable roller shaft facing away from the fixed roller shaft and is connected to the adjustable roller shaft through the elastic element; The elastic element is used to provide a force that moves the adjustable roller away from the fixed roller.

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