A semi-solid lithium battery lamination device

Abstract

This invention relates to the field of lithium battery technology, specifically to a semi-solid-state lithium battery stacking device. The device includes a substrate, a calibration mechanism, a winding execution mechanism, and a clamping mechanism. The calibration mechanism has a positive electrode plate picking and placing module and a negative electrode plate picking and placing module along the Y direction of the substrate, used for picking up, placing, and calibrating the positions of the electrodes. The winding execution mechanism includes a slide table, a lifting assembly, and a working platform. The lifting assembly uses a first wedge and a second wedge with inclined surfaces, and controls the horizontal movement of the second wedge via linear drive, thereby converting the horizontal movement into the vertical lifting and lowering of the working platform, achieving precise control of the stacking pressure. The clamping mechanism has a first clamping assembly and a second clamping assembly on the slide table, with pressing plates located on both sides of the working platform for alternately pressing and folding the separator. This invention aims to improve the stacking alignment accuracy and pressure control stability through the coordinated operation of various mechanisms, thereby improving the production efficiency and quality of lithium-ion batteries.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, and more specifically, to a semi-solid lithium battery stacking device. Background Technology

[0002] Semi-solid-state pouch lithium-ion batteries require several processes during production, including slurry preparation, coating, rolling, slicing, stacking, encapsulation, electrolyte injection, and formation. Stacking is a crucial step in lithium-ion battery manufacturing, specifically involving the alternating stacking of positive and negative electrode sheets and a separator using mechanical devices to form the core structure of the pouch lithium-ion battery. During production, the positive and negative electrode sheets, after coating and cutting, are fed into a stacking machine; the separator is placed between the positive and negative electrode sheets, serving as insulation and preventing short circuits. During stacking, after accurately positioning each layer of electrode sheets, hot pressing or pressure application is used to tightly bond the layers, ultimately forming a multi-layered stacked unit to ensure efficient ion and electron conduction within the battery.

[0003] Traditional lamination processes typically involve first cutting the separator into sheets, then using robotic arms or manual methods to alternately place the positive and negative electrode sheets onto the separator, followed by stacking and encapsulation. This method has relatively low production efficiency and limited electrode alignment accuracy. Currently, most new lamination machines employ a Z-type lamination process. This process uses a continuous, uninterrupted separator, automatically wrapping and stacking the already placed positive and negative electrode sheets through Z-shaped folding.

[0004] During the operation of the lamination machine, the control of lamination pressure is crucial. Insufficient lamination pressure can easily cause the positive and negative electrode plates of the cell to shift or misalign, resulting in insufficient overhang values ​​(the coverage of the separator over the negative electrode plate and the coverage of the negative electrode plate over the positive electrode plate). In later charging and discharging processes, this can easily lead to lithium plating, poor battery K-value, short circuits, and combustion risks. Excessive lamination pressure, on the other hand, can easily cause indentations, scratches, or damage to the positive and negative electrode plates and the separator surface, increasing the amount of dust and impurities inside the battery, which can lead to quality problems such as short circuits and appearance defects in later stages. Summary of the Invention

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a semi-solid-state lithium battery stacking device, which aims to precisely control the stacking pressure and improve the production efficiency and quality of lithium battery cells.

[0006] A semi-solid-state lithium battery stacking device according to an embodiment of the present invention includes:

[0007] substrate;

[0008] The calibration mechanism includes a positive electrode pick-and-place module and a negative electrode pick-and-place module arranged sequentially along the Y direction of the substrate. The positive electrode pick-and-place module is equipped with a first calibration platform and a first robotic arm, and the negative electrode pick-and-place module is equipped with a second calibration platform and a second robotic arm. The first robotic arm and the second robotic arm are capable of reciprocating along the X direction of the substrate.

[0009] A winding actuator is provided, comprising a slide table, a lifting assembly, and a working platform. The slide table is slidably connected to the substrate along the Y direction. The lifting assembly comprises a linear drive, a first wedge, and a second wedge. The first wedge is fixedly connected to the working platform, and the second wedge is slidably connected to the slide table. The first inclined surface of the first wedge abuts against the second inclined surface of the second wedge. The linear drive is driveably connected to the second wedge, and the linear drive can control the second wedge to move horizontally.

[0010] A clamping mechanism is provided on the slide table, wherein a first clamping component and a second clamping component are provided on the slide table, and the first clamping component and the second clamping component are respectively provided on both sides of the working platform.

[0011] According to some embodiments of the present invention, a groove is provided on the side of the first wedge block near the second wedge block, and a slider is provided on the side of the second wedge block near the first wedge block, wherein the groove and the slider are slidably connected.

[0012] According to some embodiments of the present invention, the sidewall of the slide is provided with a magnetic grid strip, and the slider is provided with a magnetic head corresponding to the magnetic grid strip.

[0013] According to some embodiments of the present invention, the linear drive includes a first motor, a first coupling, a first mounting base, a second mounting base, a first lead screw, and a transmission block; the first motor and the slide are fixedly connected, and the output end of the first motor is drivenly connected to the first lead screw through the first coupling; both ends of the first lead screw are respectively connected to the bearings of the first mounting base and the second mounting base; the transmission block is threadedly connected to the first lead screw, and the lower end of the transmission block is fixedly connected to the lower end of the second wedge.

[0014] According to some embodiments of the present invention, the winding actuator includes an upper mounting plate, a lower mounting plate, and a first guide shaft. At least two first guide shafts are provided. The upper end of the first guide shaft is fixedly connected to the upper mounting plate, and the lower end of the first guide shaft is slidably connected to the lower mounting plate.

[0015] According to some embodiments of the present invention, the working platform is provided with a plurality of negative pressure holes; the working platform is provided with clearance grooves.

[0016] According to some embodiments of the present invention, the clamping mechanism includes a T-shaped mounting base, a first cylinder, and a second cylinder. The T-shaped mounting base and the slide are fixedly connected. The first clamping assembly and the second clamping assembly are symmetrically arranged on both sides of the T-shaped mounting base. The first clamping assembly and the second clamping assembly are slidably connected to the T-shaped mounting base. The first cylinder is fixed on the T-shaped mounting base and controls the first clamping assembly to move up and down in the vertical direction. The second cylinder is fixed on the T-shaped mounting base and controls the second clamping assembly to move up and down in the vertical direction.

[0017] According to some embodiments of the present invention, the first clamping assembly and the second clamping assembly have the same structure. The first clamping assembly and the second clamping assembly are respectively provided with a box-shaped base, a second guide shaft, a first sliding shaft, a second sliding shaft, a third cylinder, a first rack, a second rack, a central gear, a first mounting arm, and a second mounting arm. The side wall of the box-shaped base is slidably connected to the partition of the T-shaped mounting seat. The side of the box-shaped base away from the partition is slidably connected to the T-shaped mounting seat via the second guide shaft. The first sliding shaft and the second sliding shaft are connected to the box-shaped base in a horizontal direction. The lower end of the first mounting arm is slidably connected to the first sliding shaft, and the lower end of the second mounting arm is slidably connected to the second guide shaft. The sliding shaft is slidably connected; the central gear and the box-shaped base are rotatably connected; the first rack and the second rack are respectively located on both sides of the central gear and mesh with the central gear; one end of the first rack is slidably connected to the first mounting arm, and the other end of the first rack is fixedly connected to the second mounting arm; one end of the second rack is slidably connected to the second mounting arm, and the other end of the second rack is fixedly connected to the first mounting arm; one end of the third cylinder is rotatably connected to the box-shaped base, and the other end of the third cylinder is rotatably connected to the first mounting arm or the second mounting arm; two pressing plates are respectively correspondingly arranged on the upper ends of the first mounting arm and the second mounting arm.

[0018] According to some embodiments of the present invention, the cross-section of the pressing plate is an isosceles trapezoid.

[0019] According to some embodiments of the present invention, a pressure sensor is provided at the lower end of the pressing plate.

[0020] A semi-solid-state lithium battery stacking device according to an embodiment of the present invention has at least the following beneficial effects:

[0021] According to the present invention, the calibration mechanism is provided with a positive electrode plate picking and placing module and a negative electrode plate picking and placing module sequentially arranged along the Y direction of the substrate. The first calibration platform of the positive electrode plate picking and placing module cooperates with the first robotic arm, and the second calibration platform of the negative electrode plate picking and placing module cooperates with the second robotic arm, realizing independent picking and placing and position calibration of the positive and negative electrode plates. The first and second robotic arms can reciprocate along the X direction of the substrate to ensure that the calibrated electrode plates are accurately transferred to the working platform, thus ensuring the alignment accuracy of the stacked plates from the source.

[0022] According to the present invention, the lifting assembly of the winding actuator adopts a transmission design with a first wedge and a second wedge engaging on inclined surfaces. The first wedge is fixedly connected to the working platform, and the second wedge is slidably connected to the slide table. The first inclined surface of the first wedge abuts against the second inclined surface of the second wedge. Linear drive controls the horizontal movement of the second wedge, converting the horizontal movement into the vertical lifting of the working platform through the action of the inclined surfaces. This transmission method has a compact structure and high rigidity. The inclined surface engagement has a self-locking characteristic, which helps maintain the stability of the working platform under pressure and enables precise control of the lifting height and speed, thus providing a reliable guarantee for applying uniform lamination pressure.

[0023] According to the present invention, the first wedge and the second wedge are engaged by an inclined plane, converting the horizontal displacement of the second wedge into the vertical displacement of the first wedge. This inclined plane mechanism has displacement amplification characteristics, allowing precise adjustment of the working platform height through horizontal displacement control. The working platform is rigidly connected to the first wedge, forming direct end-effector control; the pressing plate of the clamping mechanism maintains a fixed relative height with the substrate in the pressing state. Therefore, the control of the lamination pressure is directly converted into the control of the final height of the working platform. This mechanism based on rigid transmission and direct end-effector height control makes the lamination pressure control more linear, stable, and repeatable, ensuring the consistency and accuracy of pressure during the lamination process from a mechanical structure perspective.

[0024] According to the present invention, the clamping mechanism is provided with a first clamping assembly and a second clamping assembly on the slide table, and both assemblies are equipped with pressing plates on both sides of the working platform. The first clamping assembly and the second clamping assembly, in coordination with the Y-axis movement of the slide table and the lifting action of the working platform, alternately press and fold the continuous diaphragm through the pressing plates on both sides. This structural design allows the diaphragm folding and electrode lamination processes to be carried out simultaneously, effectively avoiding diaphragm wrinkling and electrode displacement, and ensuring the flatness and consistency of the cell stack.

[0025] According to the present invention, the substrate-based stacking machine integrates a correction mechanism, a winding actuator, and a clamping mechanism. The modular functional design improves the overall operational reliability and maintainability of the equipment. The precise lifting control of the winding actuator combined with the reliable pressing action of the clamping mechanism can improve production efficiency while effectively preventing quality problems such as electrode warping or diaphragm damage caused by improper stacking pressure. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of one structure of the present invention;

[0027] Figure 2 This is a top-view structural diagram of the present invention;

[0028] Figure 3 This is a schematic diagram of the assembly structure of the winding actuator and clamping mechanism of the present invention;

[0029] Figure 4 This is a schematic diagram of a winding actuator of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of some parts of the winding actuator of the present invention;

[0031] Figure 6 This is a schematic diagram of one structure of the clamping mechanism of the present invention;

[0032] Figure 7 This is a cross-sectional view of the clamping mechanism of the present invention;

[0033] Figure 8 This is a schematic diagram of a structure of the first clamping component of the present invention;

[0034] Figure 9 This is a cross-sectional view of the winding actuator of the present invention.

[0035] In the picture:

[0036] 100-substrate;

[0037] 200-Calibration mechanism, 210-Positive electrode plate picking and placing module, 211-First calibration platform, 212-First robotic arm, 220-Negative electrode plate picking and placing module, 221-Second calibration platform, 222-Second robotic arm;

[0038] 300-Winding actuator, 310-Slide table, 320-Lifting assembly, 321-Linear drive, 3211-First motor, 3212-First coupling, 3213-First mounting base, 3214-Second mounting base, 3215-First lead screw, 3216-Transmission block, 322-First wedge, 3221-First inclined plane, 3222-Slide groove, 323-Second wedge, 3231-Second inclined plane, 3232-Slider, 330-Working platform, 331-Negative pressure hole, 332-Relief groove, 340-Magnetic grating strip, 350-Magnetic head, 360-Upper mounting plate, 370-Lower mounting plate, 380-First guide shaft;

[0039] 400-Clamping mechanism, 410a-First clamping assembly, 410b-Second clamping assembly, 411-Pressing plate, 412-Box-type base, 413-Second guide shaft, 414-First sliding shaft, 415-Second sliding shaft, 416-Third cylinder, 417-First rack, 418-Second rack, 419-Center gear, 420-T-type mounting seat, 421-Partition plate, 430-First cylinder, 440-Second cylinder, 450-First mounting arm, 460-Second mounting arm, 470-Reciprocating drive, 471-Second motor, 472-Second coupling, 473-Third mounting seat, 474-Fourth mounting seat, 475-Second lead screw, 476-Second nut seat. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0042] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or the order in which the indicated technical features are presented.

[0043] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0044] Reference Figures 1 to 9 As shown, this invention discloses a semi-solid-state lithium battery stacking device, including a substrate 100, a calibration mechanism 200, a winding execution mechanism 300, and a clamping mechanism 400. The calibration mechanism 200 is sequentially provided with a positive electrode plate picking and placing module 210 and a negative electrode plate picking and placing module 220 along the Y direction of the substrate 100. The positive electrode plate picking and placing module 210 is provided with a first calibration platform 211 and a first robotic arm 212, and the negative electrode plate picking and placing module 220 is provided with a second calibration platform 221 and a second robotic arm 222. The first robotic arm 212 and the second robotic arm 222 are capable of reciprocating along the X direction of the substrate 100. The winding execution mechanism 300 is provided with a slide table 310, a lifting assembly 320, and a working platform 330. The slide table 310 reciprocates along the Y direction of the substrate 100. The direction and the base plate 100 are slidably connected; the lifting assembly 320 is provided with a linear drive 321, a first wedge 322 and a second wedge 323, the first wedge 322 is fixedly connected to the working platform 330, the second wedge 323 is slidably connected to the slide table 310, and the first inclined surface 3221 of the first wedge 322 abuts against the second inclined surface 3231 of the second wedge 323; the linear drive 321 and the second wedge 323 are connected by transmission, and the linear drive 321 can control the second wedge 323 to move in the horizontal direction; the clamping mechanism 400 is provided with a first clamping assembly 410a and a second clamping assembly 410b on the slide table 310, and the first clamping assembly 410a and the second clamping assembly 410b are respectively provided with pressing plates 411 on both sides of the working platform 330.

[0045] Reference Figure 1 and Figure 2As shown, in this embodiment, the device achieves high-efficiency and high-precision Z-shaped stacking operations through the coordinated operation of the calibration mechanism 200, the winding execution mechanism 300, and the clamping mechanism 400. Specifically, firstly, the calibration mechanism 200 sequentially arranges the positive electrode plate picking and placing module 210 and the negative electrode plate picking and placing module 220 along the Y direction of the substrate 100. The positive electrode plate is picked up by the first robot arm 212 and placed on the first calibration platform 211 for calibration, while the negative electrode plate is picked up by the second robot arm 222 and calibrated on the second calibration platform 221. After the position calibration is completed, the first robot arm 212 and the second robot arm 222 reciprocate along the X direction of the substrate 100, sequentially transferring the calibrated positive and negative electrode plates to the working platform 330 of the winding execution mechanism 300, providing an alignment basis for subsequent stacking. Through the design of this structure, the calibration mechanism 200 sequentially arranges the positive electrode plate picking and placing module 210 and the negative electrode plate picking and placing module 220 along the Y direction of the substrate 100. The first calibration platform 211 of the positive electrode plate picking and placing module 210 cooperates with the first robotic arm 212, and the second calibration platform 221 of the negative electrode plate picking and placing module 220 cooperates with the second robotic arm 222, realizing independent picking and placing and position calibration of the positive and negative electrode plates. The first robotic arm 212 and the second robotic arm 222 can reciprocate along the X direction of the substrate 100 to ensure that the calibrated electrode plates are accurately transferred to the working platform 330, thus ensuring the alignment accuracy of the stacked plates from the source.

[0046] Subsequently, the winding actuator 300 begins operation. The linear drive 321 pushes the second wedge 323 to move horizontally. Through the interaction between the first inclined surface 3221 of the first wedge 322 and the second inclined surface 3231 of the second wedge 323, the horizontal displacement of the second wedge 323 is converted into the vertical lifting motion of the first wedge 322 and its rigidly connected working platform 330. In this embodiment, the inclination angles of the first inclined surface 3221 and the second inclined surface 3231 determine that the second wedge 323 needs to move a relatively large horizontal stroke to drive the working platform 330 to produce a small vertical displacement change. Through the design of this structure, the horizontal motion resolution of the linear drive 321 is amplified to achieve a higher adjustment accuracy in the vertical direction. In this embodiment, the lifting component 320 of the winding actuator 300 adopts a transmission design in which the inclined surfaces of the first wedge 322 and the second wedge 323 cooperate. The first wedge 322 is fixedly connected to the working platform 330, and the second wedge 323 is slidably connected to the slide 310. The first inclined surface 3221 of the first wedge 322 abuts against the second inclined surface 3231 of the second wedge 323. The linear drive 321 controls the horizontal movement of the second wedge 323, converting the horizontal movement into the vertical lifting and lowering of the working platform 330 through the action of the inclined surfaces. This transmission method has a compact structure and high rigidity. The inclined surface engagement has a self-locking characteristic, which helps maintain the stability of the working platform 330 under pressure and enables precise control of the lifting height and speed, thus providing a reliable guarantee for applying uniform stacking pressure.

[0047] At the same time, refer to Figures 1 to 5 As shown, the self-locking effect generated by the cooperation of the first inclined plane 3221 and the second inclined plane 3231 helps maintain the positional stability of the working platform 330 under pressure. In this embodiment, the first wedge 322 and the second wedge 323 cooperate through inclined planes, converting the horizontal displacement of the second wedge 323 into the vertical displacement of the first wedge 322. This inclined plane mechanism has displacement amplification characteristics, allowing precise adjustment of the height of the working platform 330 through horizontal displacement control. The working platform 330 is rigidly connected to the first wedge 322, forming direct end control; the pressing plate 411 of the clamping mechanism 400 maintains a fixed relative height with the substrate 100 in the pressing state. Therefore, the control of the lamination pressure is directly converted into the control of the final height of the working platform 330. This mechanism based on rigid transmission and direct end height control makes the lamination pressure control more linear, stable and repeatable, ensuring the consistency and accuracy of pressure during the lamination process from a mechanical structure perspective.

[0048] Furthermore, the lifting height, speed, and final lamination pressure of the working platform 330 are controlled with high precision and stability. Simultaneously with the precise lifting movement of the working platform 330, the clamping mechanism 400 mounted on the slide table 310 operates synchronously. The slide table 310 can slide along the substrate 100Y direction, and the first clamping assembly 410a and the second clamping assembly 410b are respectively located on both sides of the working platform 330. As the working platform 330 rises and falls and the slide table 310 moves, the pressing plates 411 on the first clamping assembly 410a and the second clamping assembly 410b alternately press and fold the continuous diaphragm covering the electrode sheet. Because the height of the working platform 330 is precisely and stably controlled, and the relative height between the pressing plate 411 and the substrate 100 remains fixed during pressing, the pressure applied to the cell stack directly depends on the set height of the working platform 330. This ensures that the pressure on each stack is uniform and consistent. Finally, through the precise feeding of the correction mechanism 200, the precise closed-loop control of the lifting height of the working platform 330 and the stacking pressure by the winding execution mechanism 300, and the smooth and reliable alternating pressing and folding action of the clamping mechanism 400, the positive electrode sheet, separator, and negative electrode sheet are alternately stacked to form a cell core with a flat internal structure and high alignment. The entire process is integrated on the substrate 100. The modular design ensures the reliability of equipment operation and the convenience of maintenance. While improving production efficiency, it effectively prevents quality problems such as electrode sheet warping, separator wrinkling, or damage caused by misalignment or uneven pressure. In this embodiment, the clamping mechanism 400 is equipped with a first clamping component 410a and a second clamping component 410b on the slide table 310. Both components have pressing plates 411 on both sides of the working platform 330. The first clamping component 410a and the second clamping component 410b, in coordination with the Y-axis movement of the slide table 310 and the lifting action of the working platform 330, alternately press and fold the continuous diaphragm through the pressing plates 411 on both sides. This structural design allows the diaphragm folding and electrode lamination processes to proceed synchronously, effectively preventing diaphragm wrinkling and electrode displacement, and ensuring the flatness and consistency of the cell stack.

[0049] Through this structural design, the stacking machine built on substrate 100 integrates a correction mechanism 200, a winding actuator 300, and a clamping mechanism 400. The modular functional design improves the overall operational reliability and maintainability of the equipment. The precise lifting control of the winding actuator 300 combined with the reliable pressing action of the clamping mechanism 400 can effectively prevent quality problems such as electrode warping or diaphragm damage caused by improper lamination pressure while improving production efficiency.

[0050] In some embodiments of the present invention, reference is made to... Figure 5As shown, a groove 3222 is provided on the side of the first wedge 322 near the second wedge 323, and a slider 3232 is provided on the side of the second wedge 323 near the first wedge 322. The groove 3222 and the slider 3232 are slidably connected. Further, a magnetic grating strip 340 is provided on the sidewall of the groove 3222, and a magnetic head 350 is provided on the slider 3232 corresponding to the magnetic grating strip 340. Specifically, in this embodiment, the sliding engagement of the slider 3232 and the groove 3222 not only provides sliding guidance, but also allows for high-precision machining of the slider 3232 and the groove 3222 during the machining of the first wedge 322 and the second wedge 323, while other surfaces can be machined with a lower precision. This reduces machining costs. Furthermore, when the linear drive 321 pushes the second wedge 323 to move horizontally, the slider 3232 on the second wedge 323 slides within the groove 3222 of the first wedge 322. A magnetic grating strip 340 is installed on the sidewall of the slide groove 3222. The surface of the magnetic grating strip 340 records a high-precision, periodically varying magnetization signal with a constant pitch. Specifically, the body of the magnetic grating strip 340 uses a non-magnetic material such as stainless steel or aluminum alloy as a substrate. A magnetic thin film is formed on the substrate through coating or electroplating. Then, a magnetic recording head 350 records periodic magnetization signals with a pitch of 0.05 mm or 0.10 mm onto the thin film, thus forming the magnetic grating strip 340. The magnetic grating strip 340 is embedded or attached to at least one sidewall of the slide groove 3222 of the first wedge block 322. A magnetic head 350 is fixedly connected to the slider 3232. In this embodiment, the slider 3232 can read the magnetic signal on the magnetic grating strip 340 in real time during sliding. The magnetic head 350 is a pickup head and maintains a small, constant air gap with the working surface of the magnetic grating strip 340, typically tens of micrometers. During the movement of the second wedge 323, the magnetic head 350 reads the changes in the magnetization signal on the magnetic grating strip 340 in real time and transmits the signal to the subsequent signal processing circuit and motion controller, forming a direct, fully closed-loop, high-precision detection of the horizontal displacement of the second wedge 323. This structural design allows for direct detection of the horizontal displacement of the second wedge 323, avoiding transmission chain errors such as lead screw backlash and elastic deformation caused by indirect measurement via the drive motor encoder. Since the inclined plane mechanism amplifies the horizontal displacement into a more refined vertical displacement adjustment capability, combined with the micron-level detection accuracy of the magnetic grating itself, the vertical position control of the working platform 330 can achieve a nanometer-level equivalent resolution. This provides a direct measurement basis for the ultra-precision control of the lamination pressure. Furthermore, the magnetic grating strip 340 is mounted on the side wall of the slide groove 3222, and the magnetic head 350 is fixed on the slider 3232. This arrangement integrates the measurement reference with the motion transmission components, forming a fully closed-loop position feedback. The system can compensate for any positional deviation caused by temperature changes, mechanical wear, or external interference in real time, thereby greatly improving the positional stability and long-term accuracy retention of the work platform 330 under repetitive motion and pressure conditions.Furthermore, magnetic grating measurement is a non-contact detection method, insensitive to oil, dust, and other contaminants, making it ideal for the working environments that stacking machines may encounter during production. Compared to optical scales, it has better resistance to contamination, ensuring long-term measurement reliability and stability in complex industrial environments.

[0051] In some embodiments of the present invention, reference is made to... Figure 4 As shown, the linear drive 321 includes a first motor 3211, a first coupling 3212, a first mounting base 3213, a second mounting base 3214, a first lead screw 3215, and a transmission block 3216. The first motor 3211 is fixedly connected to the slide table 310, and the output end of the first motor 3211 is driven by the first coupling 3212 and the first lead screw 3215. The two ends of the first lead screw 3215 are respectively connected to the first mounting base 3213 and the second mounting base 3214 with bearings. The transmission block 3216 is threadedly connected to the first lead screw 3215, and the lower end of the transmission block 3216 and the second wedge block 323 are fixedly connected. Specifically, in this embodiment, the linear drive 321 provides rotational power through the first motor 3211. The output end of the first motor 3211 is connected to the first lead screw 3215 through the first coupling 3212, transmitting torque to the first lead screw 3215. The first lead screw 3215 is supported at both ends by bearings via a first mounting base 3213 and a second mounting base 3214, enabling it to rotate stably on a fixed axis. A transmission block 3216, threadedly engaged with the first lead screw 3215, converts its rotational motion into linear motion. The transmission block 3216 is fixedly connected to the lower end of the second wedge block 323, directly transmitting the linear motion to the second wedge block 323 and driving it to move precisely horizontally.

[0052] Furthermore, referring to Figure 4 and Figure 5As shown, the position detection system composed of the magnetic grating strip 340 and the magnetic head 350 provides direct displacement feedback for the linear drive 321. The magnetic grating strip 340 is fixed to the side wall of the groove 3222 of the first wedge 322, and the magnetic head 350 is mounted on the slider 3232 of the second wedge 323. When the first motor 3211 drives the first lead screw 3215 to rotate through the first coupling 3212, thereby causing the transmission block 3216 to drive the second wedge 323 to move horizontally, the moving magnetic head 350 reads the magnetization signal on the magnetic grating strip 340 in real time. This signal is converted into the actual horizontal displacement data of the second wedge 323 relative to the first wedge 322 and fed back to the control system. The control system compares this directly measured actual displacement value with the theoretical displacement command calculated based on the number of rotations of the first motor 3211 and the lead screw lead in real time. If a deviation exists, the control system generates a correction command, dynamically adjusting the number of rotations or the angle of the first motor 3211 until the actual displacement of the second wedge 323 matches the target displacement, thereby achieving full closed-loop precision control of the horizontal position of the second wedge 323. The magnetic grating signal provides a direct, high-resolution measurement of the horizontal displacement of the second wedge 323, with a detection accuracy down to the micrometer level, such as when the signal period is 0.05 mm. By comparing and correcting this feedback signal with the number of rotations of the first motor 3211, the system can actively compensate for the torsional error of the first coupling 3212, the pitch error and thermal expansion of the first lead screw 3215, and the backlash and elastic deformation of each link in the transmission chain. This closed-loop control based on direct end-point measurement eliminates the cumulative transmission error in open-loop or semi-loop control, so that the final lifting position control accuracy of the working platform 330 no longer depends on the absolute accuracy of the intermediate transmission components, significantly improving the overall position control accuracy, repeatability, and long-term stability of the system.

[0053] In some embodiments of the present invention, reference is made to... Figure 4As shown, the winding actuator 300 includes an upper mounting plate 360, a lower mounting plate 370, and first guide shafts 380. At least two first guide shafts 380 are provided. The upper end of each first guide shaft 380 is fixedly connected to the upper mounting plate 360, and the lower end of each first guide shaft 380 is slidably connected to the lower mounting plate 370. Specifically, in this embodiment, the upper mounting plate 360 ​​is fixedly connected to the working platform 330, forming the core output component for the lifting motion. The lower mounting plate 370 serves as a fixed reference and is fixedly connected to the first mounting base 3213 and the second mounting base 3214, providing stable support for the first lead screw 3215. The upper ends of at least two first guide shafts 380 are fixedly connected to the upper mounting plate 360, and their lower ends are slidably connected to the lower mounting plate 370. When the lifting assembly 320 drives the work platform 330 and the upper mounting plate 360 ​​to move vertically, the first guide shaft 380 precisely guides the upper mounting plate 360 ​​to translate vertically, constraining its lateral displacement and deflection, ensuring that the lifting trajectory of the work platform 330 strictly maintains straightness and verticality. Throughout the entire movement, the lower mounting plate 370 and the lead screw support structure fixed on it remain stationary. Through the design of this structure, the guiding accuracy, rigidity, and stability of the winding actuator 300 are greatly improved.

[0054] In some embodiments of the present invention, reference is made to... Figure 4 As shown, the working platform 330 is provided with a plurality of negative pressure holes 331; the working platform 330 is also provided with clearance grooves 332. Specifically, in this embodiment, the plurality of negative pressure holes 331 provided on the working platform 330 are connected to an external vacuum system. When the electrode sheet is transferred to the surface of the working platform 330 by the robotic arm, the vacuum system is activated, and the negative pressure holes 331 generate an adsorption force, firmly and flatly adsorbing and fixing the electrode sheet to the surface of the working platform 330, preventing it from shifting during subsequent stacking processes. The clearance grooves 332 provided on the working platform 330 facilitate the subsequent mechanical grippers to pick up and place the processed battery cells on the working platform 330.

[0055] In some embodiments of the present invention, reference is made to... Figures 1 to 9As shown, the clamping mechanism 400 includes a T-shaped mounting base 420, a first cylinder 430, and a second cylinder 440. The T-shaped mounting base 420 and the slide table 310 are fixedly connected. The first clamping component 410a and the second clamping component 410b are symmetrically arranged on both sides of the T-shaped mounting base 420. The first clamping component 410a and the second clamping component 410b are slidably connected to the T-shaped mounting base 420. The first cylinder 430 is fixed on the T-shaped mounting base 420 and controls the first clamping component 410a to move up and down in the vertical direction. The second cylinder 440 is fixed on the T-shaped mounting base 420 and controls the second clamping component 410b to move up and down in the vertical direction. Specifically, in this embodiment, the T-shaped mounting base 420 is fixedly connected to the slide table 310, providing the mounting foundation and motion transmission for the entire clamping mechanism 400. The first clamping assembly 410a and the second clamping assembly 410b are symmetrically arranged on both sides of the T-shaped mounting base 420 and are slidably connected to the T-shaped mounting base 420 to ensure that they can move independently in a set direction. The first cylinder 430 is fixed on the T-shaped mounting base 420, and the output end of the first cylinder 430 is connected to the first clamping assembly 410a to control the vertical lifting and lowering movement of the first clamping assembly 410a. The second cylinder 440 is fixed on the T-shaped mounting base 420 and independently controls the vertical lifting and lowering movement of the second clamping assembly 410b. During the stacking process, the first clamping assembly 410a or the second clamping assembly 410b is sent to a predetermined position above the working platform 330 by the movement of the slide table 310 along the Y direction of the substrate 100. Then, the corresponding cylinder drives it to descend, so that the pressing plate 411 presses and folds the diaphragm and the electrode sheet.

[0056] In some embodiments of the present invention, reference is made to... Figures 6 to 8As shown, the first clamping assembly 410a and the second clamping assembly 410b have the same structure. The first clamping assembly 410a and the second clamping assembly 410b are respectively provided with a box-shaped base 412, a second guide shaft 413, a first sliding shaft 414, a second sliding shaft 415, a third cylinder 416, a first rack 417, a second rack 418, a central gear 419, a first mounting arm 450, and a second mounting arm 460. The side wall of the box-shaped base 412 is slidably connected to the partition plate 421 of the T-shaped mounting seat 420. The side of the box-shaped base 412 away from the partition plate 421 is slidably connected to the T-shaped mounting seat 420 via the second guide shaft 413. The first sliding shaft 414 and the second sliding shaft 415 are connected to the box-shaped base 412 in the horizontal direction. The lower end of the first mounting arm 450 is slidably connected to the first sliding shaft 414. The second mounting arm 460... The lower end of 60 is slidably connected to the second sliding shaft 415; the central gear 419 and the box-shaped base 412 are rotatably connected; the first rack 417 and the second rack 418 are respectively located on both sides of the central gear 419 and mesh with the central gear 419; one end of the first rack 417 is slidably connected to the first mounting arm 450, and the other end of the first rack 417 is fixedly connected to the second mounting arm 460; one end of the second rack 418 is slidably connected to the second mounting arm 460, and the other end of the second rack 418 is fixedly connected to the first mounting arm 450; one end of the third cylinder 416 is rotatably connected to the box-shaped base 412, and the other end of the third cylinder 416 is rotatably connected to the first mounting arm 450 or the second mounting arm 460; two pressing plates 411 are respectively correspondingly arranged at the upper ends of the first mounting arm 450 and the second mounting arm 460. Specifically, in this embodiment, the output end of the third cylinder 416 is connected to the second mounting arm 460 via a transmission, controlling the second mounting arm 460 to slide horizontally along the axis of the second sliding shaft 415; the first rack 417, fixedly connected to the second mounting arm 460, moves synchronously with the second mounting arm 460 and drives the central gear 419 meshing with it to rotate; the rotation of the central gear 419 drives the second rack 418 meshing with it to move, and the second rack 418 drives the first mounting arm 450, fixedly connected to itself, to move along the axis of the first sliding shaft 415. The first mounting arm 450 slides horizontally along its axis, with the sliding direction of the first mounting arm 450 opposite to that of the second mounting arm 460. During this process, the sliding connection between the first rack 417 and the first mounting arm 450, and the sliding connection between the second rack 418 and the second mounting arm 460, ensures smooth operation of the transmission mechanism. Finally, the synchronous reverse movement of the first mounting arm 450 and the second mounting arm 460 is transmitted to the two pressing plates 411 fixed to their upper ends, achieving precise symmetrical opening and closing of the pressing plates 411. Through this structural design, the symmetrical structure of the first clamping assembly 410a and the second clamping assembly 410b achieves absolute synchronization and high-rigidity clamping of the movement of the two pressing plates 411.The meshing transmission between the rack and the central gear 419 ensures that the displacements of the first mounting arm 450 and the second mounting arm 460 are precisely equal and opposite in direction, thereby ensuring the symmetry of the movement of the two pressing plates 411 relative to the center of the working platform 330 and making the pressure applied to the diaphragm evenly distributed. The sliding connection between the box-type base 412 and the T-type mounting seat 420, the sliding connection between the mounting arm and the sliding shaft, and the sliding connection between the rack and the mounting arm constitute a multi-stage guiding system, effectively constraining the degrees of freedom of the moving parts in the non-driving direction. This design improves the rigidity of the overall structure of the clamping assembly, reduces positional wobble during the pressing action, and ensures the repeatability accuracy of the pressing position. The third cylinder 416 simplifies the control system by serving as a single drive source. The symmetrical and identical component design improves the versatility and interchangeability of parts, which is beneficial for the manufacturing, assembly, and maintenance of the equipment.

[0057] In some embodiments of the present invention, the cross-section of the pressing plate 411 is an isosceles trapezoid. This structural design improves the structural strength of the pressing plate 411. At the same time, when the diaphragm or electrode covers the pressing plate 411, the two sloping sides of the trapezoid can naturally guide and stretch the diaphragm and electrode stack.

[0058] In some embodiments of the present invention, a pressure-sensitive sensor is provided at the lower end of the pressing plate 411. Specifically, in this embodiment, the pressure-sensitive sensor integrated at the lower end of the pressing plate 411 constitutes a key terminal sensing unit for pressure closed-loop control. During the lamination process, the sensor directly measures the real-time pressure distribution acting on the laminated surface. The measured value is fed back to the control system in real time and compared with a preset process pressure curve. If there is a deviation between the measured pressure and the target value, the control system can dynamically adjust the output force of the third cylinder 416 or the feed amount of the linear drive 321 in the winding actuator 300, thereby achieving adaptive and precise control of the laminated pressure. This closed-loop control based on direct end measurement can actively compensate for pressure disturbances caused by electrode thickness tolerance, diaphragm tension fluctuations, or thermal deformation of the mechanical system.

[0059] In some embodiments of the present invention, reference is made to... Figure 9As shown, a reciprocating drive 470 is provided at the bottom of the slide table 310. The reciprocating drive 470 includes a second motor 471, a second coupling 472, a third mounting base 473, a fourth mounting base 474, a second lead screw 475, and a second nut seat 476. The second motor 471 is fixedly connected to the base plate 100, and its output end is connected to the second lead screw 475 via the second coupling 472. Both ends of the second lead screw 475 are connected to the third mounting base 473 and the fourth mounting base 474 respectively via bearings. The third mounting base 473 and the fourth mounting base 474 are fixed to the base plate 100. The second nut seat 476 is threadedly connected to the second lead screw 475, and its upper end is fixedly connected to the bottom surface of the slide table 310. Specifically, in this embodiment, when the second motor 471 rotates, its torque is transmitted to the second lead screw 475 via the second coupling 472, driving the second lead screw 475 to rotate. The second nut seat 476 converts the rotational motion of the second lead screw 475 into its own linear motion. Since the second nut seat 476 is fixedly connected to the slide table 310, it drives the slide table 310 and the winding actuator 300 and clamping mechanism 400 mounted thereon to perform precise linear displacement along the Y direction of the base plate 100. This drive mechanism provides a stable and reliable power source and a precise position control basis for the movement of the slide table 310.

[0060] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A semi-solid lithium battery lamination device, characterized by, include: substrate; The calibration mechanism includes a positive electrode pick-and-place module and a negative electrode pick-and-place module arranged sequentially along the Y direction of the substrate. The positive electrode pick-and-place module is equipped with a first calibration platform and a first robotic arm, and the negative electrode pick-and-place module is equipped with a second calibration platform and a second robotic arm. The first robotic arm and the second robotic arm are capable of reciprocating along the X direction of the substrate. A winding actuator is provided, comprising a slide table, a lifting assembly, and a working platform. The slide table is slidably connected to the substrate along the Y direction. The lifting assembly comprises a linear drive, a first wedge, and a second wedge. The first wedge is fixedly connected to the working platform, and the second wedge is slidably connected to the slide table. The first inclined surface of the first wedge abuts against the second inclined surface of the second wedge. The linear drive is driveably connected to the second wedge, and the linear drive can control the second wedge to move horizontally. A clamping mechanism is provided on the slide table with a first clamping component and a second clamping component, and the first clamping component and the second clamping component are respectively provided with pressing plates on both sides of the working platform; The first wedge has a groove on the side near the second wedge, and the second wedge has a slider on the side near the first wedge. The groove and the slider are slidably connected. The sidewall of the slide is provided with magnetic grid strips, and the slider is provided with a magnetic head corresponding to the magnetic grid strips.

2. The semi-solid-state lithium battery stacking device according to claim 1, characterized in that, The linear drive includes a first motor, a first coupling, a first mounting base, a second mounting base, a first lead screw, and a transmission block; the first motor and the slide are fixedly connected, and the output end of the first motor is drivenly connected to the first lead screw through the first coupling; the two ends of the first lead screw are respectively connected to the bearings of the first mounting base and the second mounting base; the transmission block is threadedly connected to the first lead screw, and the lower end of the transmission block is fixedly connected to the second wedge block.

3. The semi-solid-state lithium battery stacking device according to claim 2, characterized in that, The winding actuator includes an upper mounting plate, a lower mounting plate, and a first guide shaft. At least two first guide shafts are provided. The upper end of the first guide shaft is fixedly connected to the upper mounting plate, and the lower end of the first guide shaft is slidably connected to the lower mounting plate.

4. The semi-solid-state lithium battery stacking device according to any one of claims 1 to 3, characterized in that, The working platform is provided with several negative pressure holes; the working platform is provided with clearance grooves.

5. The semi-solid-state lithium battery stacking device according to claim 1, characterized in that, The clamping mechanism includes a T-shaped mounting base, a first cylinder, and a second cylinder. The T-shaped mounting base and the slide are fixedly connected. The first clamping component and the second clamping component are symmetrically arranged on both sides of the T-shaped mounting base. The first clamping component and the second clamping component are slidably connected to the T-shaped mounting base. The first cylinder is fixed on the T-shaped mounting base and controls the first clamping component to move up and down in the vertical direction. The second cylinder is fixed on the T-shaped mounting base and controls the second clamping component to move up and down in the vertical direction.

6. The semi-solid-state lithium battery stacking device according to claim 5, characterized in that, The first clamping assembly and the second clamping assembly have the same structure. The first clamping assembly and the second clamping assembly are respectively provided with a box-shaped base, a second guide shaft, a first sliding shaft, a second sliding shaft, a third cylinder, a first rack, a second rack, a central gear, a first mounting arm, and a second mounting arm. The side wall of the box-shaped base is slidably connected to the partition of the T-shaped mounting seat. The side of the box-shaped base away from the partition is slidably connected to the T-shaped mounting seat via the second guide shaft. The first sliding shaft and the second sliding shaft are connected to the box-shaped base in a horizontal direction. The lower end of the first mounting arm is slidably connected to the first sliding shaft. The lower end of the mounting arm is slidably connected to the second sliding shaft; the central gear is rotatably connected to the box-shaped base; the first rack and the second rack are respectively located on both sides of the central gear and mesh with the central gear; one end of the first rack is slidably connected to the first mounting arm, and the other end of the first rack is fixedly connected to the second mounting arm; one end of the second rack is slidably connected to the second mounting arm, and the other end of the second rack is fixedly connected to the first mounting arm; one end of the third cylinder is rotatably connected to the box-shaped base, and the other end of the third cylinder is rotatably connected to either the first mounting arm or the second mounting arm; The two pressing plates are respectively disposed on the upper ends of the first mounting arm and the second mounting arm.

7. The semi-solid-state lithium battery stacking device according to claim 6, characterized in that, The cross-section of the pressing plate is an isosceles trapezoid.

8. The semi-solid-state lithium battery stacking device according to claim 6, characterized in that, A pressure sensor is provided at the lower end of the pressing plate.

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