Magnetorheological suspension platform, suspension device, battery cell processing method and processing device

Abstract

The embodiment of the invention provides a magneto-rheological suspension platform, a suspension device, a battery cell processing method and a battery cell processing device. The magneto-rheological suspension platform comprises a supporting base, a supporting structure and a workbench, the supporting base is provided with a fluid containing groove and magnetorheological fluid filled in the fluid containing groove. The supporting structure comprises a shell, a fluid channel and a sliding assembly, wherein the fluid channel and the sliding assembly are arranged in the shell. The first end of the fluid channel is communicated with the fluid containing groove, the second end of the fluid channel is connected with the first end of the sliding assembly, and the second end of the sliding assembly penetrates through the shell to be connected with the workbench. The magnetorheological fluid in the fluid channel controls the sliding assembly to move in the axial direction of the shell under the action of a magnetic field so as to provide suspension support for a battery cell material or other materials on the workbench to adapt to stress changes of the materials in the machining process.

Description

Technical Field

[0001] This application relates to the field of battery cell processing technology, and in particular to a magnetorheological levitation platform, a levitation device, a battery cell processing method, and a processing apparatus. Background Technology

[0002] Cylindrical battery cells are widely used in energy storage systems and other fields. Their manufacturing process includes key steps such as winding, welding, and defect detection. Current cylindrical battery cell processing typically uses rigid fixtures to hold the cell material during processing. However, this rigid fixtures cause stress concentration, making them unable to adapt to stress changes in the cell material. This can easily lead to wrinkles and interlayer separation, affecting processing accuracy and quality. Summary of the Invention

[0003] This application provides a magnetorheological levitation platform, a levitation device, a cell processing method, and a processing apparatus, aiming to improve the problem of stress concentration caused by rigid clamping during cell processing.

[0004] A magnetorheological levitation platform includes a support base, a support structure, and a worktable; The support base is provided with a fluid receiving groove and a magnetorheological fluid filled in the fluid receiving groove; The support structure includes a housing, a fluid channel disposed within the housing, and a sliding assembly; a first end of the fluid channel is connected to the fluid receiving tank, a second end of the fluid channel is connected to the first end of the sliding assembly, and the second end of the sliding assembly passes through the housing and is connected to the worktable; the magnetorheological fluid in the fluid channel, under the action of a magnetic field, controls the sliding assembly to move along the axial direction of the housing.

[0005] In this embodiment, a levitation magnetic field generator is provided around the magnetorheological levitation platform. When the levitation magnetic field generator is working, it will generate a levitation magnetic field. Under the action of the levitation magnetic field, the magnetorheological fluid in the fluid channel causes the sliding component to move along the axial direction of the shell, thereby controlling the worktable to move along the axial direction of the shell. This achieves levitation support for the battery cell material or other processing materials on the worktable, thereby overcoming the stress concentration caused by rigid clamping during the processing of the battery cell material or other processing materials, and avoiding stress concentration from affecting the processing quality and processing accuracy.

[0006] Preferably, the support base includes a base plate, a first support ring and a second support ring disposed on the base plate, the first support ring being located inside the second support ring, and the first support ring and the second support ring cooperating to form the fluid receiving groove; The first support ring is provided with a connecting channel that connects the fluid receiving groove and the fluid channel; The support structure is disposed between the first support ring and the worktable.

[0007] Preferably, the magnetorheological levitation platform includes a mounting plate fixedly disposed within the housing; The sliding assembly includes a sliding plate, a support plate, multiple support rods, and a connecting rod; the sliding plate is slidably disposed within the housing; the first end of each support rod is connected to a fluid channel, and the second ends of the multiple support rods are connected to the first surface of the sliding plate; the first end of the connecting rod is connected to the second surface of the sliding plate, and the second end of the connecting rod passes through the housing and is connected to the support plate, and the support plate is connected to the worktable; The fluid channel includes a main channel and multiple branch channels; the multiple branch channels are assembled on the mounting plate, and the first end of each of the multiple branch channels is connected to the fluid receiving groove through the main channel, and the second end of each branch channel is connected to a support rod.

[0008] A magnetorheological levitation device includes a levitation magnetic field generator and the aforementioned magnetorheological levitation platform; The levitation magnetic field generator is located below the magnetorheological levitation platform and is used to form a levitation magnetic field around the magnetorheological levitation platform.

[0009] In this embodiment, a levitation magnetic field generator is provided around the magnetorheological levitation platform. When the levitation magnetic field generator is working, it will generate a levitation magnetic field. Under the action of the levitation magnetic field, the magnetorheological fluid in the fluid channel causes the sliding component to move along the axial direction of the shell, thereby controlling the worktable to move along the axial direction of the shell. This achieves levitation support for the battery cell material or other processing materials on the worktable, thereby overcoming the stress concentration caused by rigid clamping during the processing of the battery cell material or other processing materials, and avoiding stress concentration from affecting the processing quality and processing accuracy.

[0010] A method for processing battery cells, comprising: The levitation magnetic field generator is controlled to form a levitation magnetic field, which enables the magnetorheological levitation platform within the levitation magnetic field to provide levitation support for the battery cell material, and the processing equipment is controlled to process the battery cell material. A gradient magnetic field generator is controlled to form a gradient magnetic field, which induces a microparticle injection mode within the gradient magnetic field. The microparticle suspension is then injected into the target area corresponding to the cell material, and an injection feedback signal is obtained. Control the operation of the coherent photoacoustic coupling detector to acquire the phase shift signal of the cell material processing process; The control parameters of the processing equipment are adjusted based on the injection feedback signal and the phase offset signal.

[0011] In this embodiment, during the cylindrical battery cell manufacturing process, a levitation magnetic field generator is controlled to form a levitation magnetic field. This magnetic field, through a magnetorheological levitation platform, provides levitation support to the battery cell material and controls the processing equipment to process the material, thus solving the problem of uneven stress during traditional cylindrical battery cell manufacturing. A gradient magnetic field generator is controlled to induce a microparticle injection mode, directionally injecting iron oxide particles into the battery cell material to fill gaps and enhance structural stability. A phase shift signal detected by a coherent photoacoustic coupling detector captures the presence of defects during the manufacturing process. This allows for subsequent optimization of control parameters based on the phase shift signal and injection feedback signal, ensuring the processing quality of the battery cell material and thus contributing to the precision and quality of cylindrical battery cell manufacturing. The magnetorheological levitation platform, gradient magnetic field generator, microparticle injection mode, and coherent photoacoustic coupling detector work collaboratively, using a fractional-order differential control algorithm built into the control equipment for signal fusion feedback to form a closed-loop control. This process, based on existing hardware and algorithm frameworks, can guarantee the precision and quality of cylindrical battery cell manufacturing.

[0012] Preferably, adjusting the control parameters of the processing equipment based on the injection feedback signal and the phase offset signal includes: The resonant feedback signal of the cell manufacturing area is acquired by the acoustic-optic resonant cavity feedback loop, wherein the cell manufacturing area is the processing space above the magnetorheological levitation platform; The control parameters of the processing equipment are adjusted based on the injected feedback signal, the phase offset signal, and the resonant feedback signal.

[0013] Preferably, the cell processing method further includes: Obtain the signal-to-noise ratio signal of the coherent optoacoustic coupling detector; Based on the signal-to-noise ratio signal, the control parameters of the coherent photoacoustic coupling detector and the resonant frequency of the acousto-optic resonant cavity feedback loop are adjusted.

[0014] Preferably, the cell processing method further includes: Based on the phase shift signal, the region where the defect is located is determined; A gradient magnetic field generator is controlled to form a local gradient magnetic field, which induces a microparticle injection mode within the gradient magnetic field. The microparticle suspension is injected into the defect area. Based on the resonant feedback signal collected by the acousto-optic resonant cavity feedback loop, defect repair verification is performed, and the repair verification result is output. And / or, the heating unit corresponding to the defect area is controlled to heat.

[0015] Preferably, the cell processing method includes: After the cylindrical cell is filled with electrolyte, the coherent photoacoustic coupling detector is controlled to scan the cylindrical cell, determine the cell scanning signal, and acquire the resonant feedback signal collected by the acousto-optic resonant cavity feedback loop. The cell integrity is verified based on the cell scanning signal and the resonant feedback signal to determine the cell verification result.

[0016] A battery cell processing apparatus, comprising: The levitation processing module is used to control the levitation magnetic field generator to form a levitation magnetic field, so that the magnetorheological levitation platform within the levitation magnetic field provides levitation support for the battery cell material, and controls the processing equipment to process the battery cell material; The gradient induction module is used to control the gradient magnetic field generator to form a gradient magnetic field, induce the microparticle injection mode within the gradient magnetic field, inject the microparticle suspension into the target area corresponding to the cell material, and obtain the injection feedback signal. The coherent detection module is used to control the operation of the coherent photoacoustic coupling detector to acquire the phase shift signal during the processing of the battery cell material; The parameter adjustment module is used to adjust the control parameters of the processing equipment based on the injected feedback signal and the phase offset signal. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the magnetorheological levitation platform provided in an embodiment of this application; Figure 2 This is another structural diagram of the magnetorheological levitation platform provided in the embodiments of this application; Figure 3 yes Figure 2 A cross-sectional view; Figure 4 This is a cross-sectional view of the support structure in an embodiment of this application; Figure 5 This is a flowchart of a battery cell processing method provided in an embodiment of this application; Figure 6 This is a structural diagram of the battery cell processing apparatus provided in the embodiments of this application; Figure 7 This is a structural diagram of the control device provided in the embodiments of this application.

[0018] In the diagram: 1. Support base; 11. Fluid receiving tank; 12. Base plate; 13. First support ring; 14. Second support ring; 15. Connecting channel; 151. First channel; 152. Second channel; 16. Guide channel; 2. Support structure; 21. Shell; 22. Fluid channel; 221. Main channel; 222. Branch channel; 23. Sliding assembly; 231. Slide plate; 232. Support plate; 233. Support rod; 234. Connecting rod; 24. Mounting plate; 3. Workbench. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0020] This application provides a magnetorheological levitation platform, which is a device that utilizes the property changes of magnetorheological fluid under the action of a magnetic field to achieve functions such as levitation, vibration reduction, and control. The magnetorheological fluid can be composed of carbonyl iron particles, silicone oil-based fluid, and additives, including but not limited to surfactants. Magnetorheological fluids are generally suspensions formed by immersing micron- or nano-sized ferromagnetic particles in a non-magnetic carrier liquid.

[0021] like Figures 1-4 As shown, the magnetorheological levitation platform includes a support base 1, a support structure 2, and a worktable 3. The support base 1 is provided with a fluid receiving tank 11 and a magnetorheological fluid filled in the fluid receiving tank 11. The support structure 2 includes a housing 21, a fluid channel 22 disposed in the housing 21, and a sliding assembly 23. The first end of the fluid channel 22 is connected to the fluid receiving tank 11, and the second end of the fluid channel 22 is connected to the first end of the sliding assembly 23. The second end of the sliding assembly 23 passes through the housing 21 and is connected to the worktable 3. Under the action of a magnetic field, the magnetorheological fluid in the fluid channel 22 controls the sliding assembly 23 to move along the axial direction of the housing 21.

[0022] As an example, the fluid receiving tank 11 of the support base 1 is filled with magnetorheological fluid. The fluid channel 22 in the shell 21 of the support structure 2 is connected to the fluid receiving tank 11, allowing the magnetorheological fluid to flow between the fluid receiving tank 11 and the fluid channel 22. The first end of the sliding component 23 is connected to the fluid channel 22, and the second end of the sliding component 23 passes through the shell 21 and is connected to the worktable 3. In this example, a levitation magnetic field generator is provided around the magnetorheological levitation platform. When the levitation magnetic field generator is working, it will generate a levitation magnetic field. Under the action of the levitation magnetic field, the magnetorheological fluid in the fluid channel 22 causes the sliding component 23 to move along the axial direction of the shell 21, thereby controlling the worktable 3 to move along the axial direction of the shell 21. This achieves levitation support for the battery cell material or other processed materials on the worktable 3, overcoming the stress concentration caused by rigid clamping during the processing of the battery cell material or other processed materials, and avoiding stress concentration affecting the processing quality and accuracy.

[0023] In one embodiment, the support base 1 includes a base plate 12, a first support ring 13 and a second support ring 14 disposed on the base plate 12, the first support ring 13 being located inside the second support ring 14, and the first support ring 13 and the second support ring 14 cooperating to form a fluid receiving groove 11; the first support ring 13 is provided with a connecting channel 15 connecting the fluid receiving groove 11 and the fluid channel 22; the support structure 2 is disposed between the first support ring 13 and the worktable 3.

[0024] As an example, the support base 1 includes a base plate 12, on which a first support ring 13 and a second support ring 14 are disposed. The first support ring 13 is located inside the second support ring 14, forming a fluid receiving groove 11 for accommodating magnetorheological fluid between the first support ring 13 and the second support ring 14. The fluid receiving groove 11 is connected to the fluid channel 22 of the support structure 2 through a connecting channel 15 disposed within the first support ring 13. When a levitation magnetic field generator is set around the magnetorheological levitation platform to form a levitation magnetic field, the magnetorheological fluid flows between the fluid receiving groove 11, the connecting channel 15 of the first support ring 13, and the fluid channel 22 of the support structure 2 under the action of the levitation magnetic field. The viscosity of the magnetorheological fluid is adjusted according to the coil current flowing through the levitation magnetic field generator, so that the magnetorheological levitation platform can provide levitation support for battery cell materials or other materials. In this example, the magnetorheological levitation platform is provided with multiple support structures 2, which are evenly spaced within the first support ring 13 for connecting the worktable 3 to ensure the uniformity of force on the worktable 3.

[0025] In one embodiment, the connecting channel 15 includes a first channel 151 that passes radially through the first support ring 13 and a second channel 152 that is arranged axially. The first end of the second channel 152 is connected to the first channel 151 and the second channel 152 is connected to the fluid channel 22. The bottom plate 12 is also provided with a guide groove 16, which is used to connect multiple first channels 151.

[0026] As an example, the connecting channel 15 in the first support ring 13 includes a first channel 151 and a second channel 152. The first channel 151 penetrates the first support ring 13 radially and is connected to multiple first channels 151 through the guide groove 16 on the bottom plate 12, so that the magnetorheological fluid can flow between the fluid receiving tank 11, the first channel 151 and the guide groove 16, so as to ensure the uniformity of the magnetorheological fluid flow. Under the action of the suspending magnetic field, the magnetorheological fluid drives the sliding component 23 to move along the axial direction of the shell 21, which can ensure the uniformity of the force on the sliding component 23 to a certain extent.

[0027] In this example, the magnetorheological levitation platform is provided with four support structures 2, which are evenly spaced on the first support ring 13; the bottom plate 12 is provided with two flow guide channels 16, which are arranged in a cross shape, and the two ends of each flow guide channel 16 are connected to two first channels 151 respectively to ensure the uniformity of the magnetorheological fluid flow on the bottom plate 12.

[0028] In one embodiment, the magnetorheological levitation platform includes a mounting plate 24 fixedly disposed within a housing 21; the sliding assembly 23 includes a sliding plate 231, a support plate 232, multiple support rods 233, and a connecting rod 234; the sliding plate 231 is slidably disposed within the housing 21; the first end of each support rod 233 is connected to a fluid channel 22, and the second end of the multiple support rods 233 is connected to the first surface of the sliding plate 231; the first end of the connecting rod 234 is connected to the second surface of the sliding plate 231, and the second end of the connecting rod 234 passes through the housing 21 and is connected to the support plate 232, which is connected to the worktable 3; the fluid channel 22 includes a main channel 221 and multiple branch channels 222; the multiple branch channels 222 are mounted on the mounting plate 24, and the first ends of the multiple branch channels 222 are all connected to the fluid receiving tank 11 through the main channel 221, and the second end of each branch channel 222 is connected to a support rod 233.

[0029] As an example, the slide plate 231 is slidably disposed within the housing 21. The first end of each support rod 233 is inserted into the fluid channel 22 and contacts the magnetorheological fluid filling the fluid channel 22. The second ends of the multiple support rods 233 are in contact with the first surface of the slide plate 231. The first end of the connecting rod 234 is in contact with the second surface of the slide plate 231, and the second end of the connecting rod 234 passes through the housing 21 and is in contact with the support plate 232. The support plate 232 is in contact with the worktable 3. When the levitation magnetic field generator generates a levitation magnetic field, the levitation magnetic field drives the viscous magnetorheological fluid to move along the fluid channel 22. The multiple support rods 233 drive the slide plate 231 to move along the axial direction of the housing 21. The slide plate 231 drives the support plate 232 to move along the axial direction of the housing 21 through the connecting rod 234, so that the support structure 2 can provide floating support for the worktable 3. In this example, two support rods 233 can be provided in each sliding component 23, which helps to ensure uniform force distribution.

[0030] As an example, the magnetorheological levitation platform includes a mounting plate 24 fixedly disposed within the housing 21, which supports a fluid channel 22. The fluid channel 22 includes a main channel 221 and multiple branch channels 222. The first end of the main channel 221 is connected to a fluid receiving tank 11, specifically through a connecting channel 15 of the first support ring 13. The second end of the main channel 221 is connected to the first end of the multiple branch channels 222. The second end of each branch channel 222 is connected to the first end of a support rod 233. Specifically, the first end of a support rod 233 is inserted into the second end of a branch channel 222 and contacts the magnetorheological fluid within the branch channel 222, so that the multiple support rods 233, under the action of the magnetorheological fluid, drive the worktable 3 to move along the axial direction of the housing 21 via the "slide plate 231-connecting rod 234 and support plate 232".

[0031] This application provides a magnetorheological levitation device, including a levitation magnetic field generator and the magnetorheological levitation platform in the above embodiment; the levitation magnetic field generator is disposed below the magnetorheological levitation platform and is used to form a levitation magnetic field around the magnetorheological levitation platform.

[0032] As an example, the levitation magnetic field generator includes a first electromagnetic coil disposed at the bottom of the magnetorheological levitation platform. By controlling the coil current of the first electromagnetic coil, the viscosity of the liquid on the magnetorheological levitation platform can be adjusted to provide levitation support for the battery cell material or other processed material placed on the magnetorheological levitation platform. This overcomes the stress concentration caused by rigid clamping during the processing of the battery cell material or other processed material, and avoids stress concentration affecting its processing quality and processing accuracy.

[0033] This application provides a cell processing method, which is illustrated by taking the application of the method in a control device as an example. This cell processing method is used to realize cylindrical cells, especially for processing large-diameter cylindrical cells in new energy vehicles or energy storage systems. It helps to ensure the structural uniformity and controllability of internal defects of the processed cylindrical cells.

[0034] The following is an explanation of some of the terms used in the embodiments of this application.

[0035] Cell materials refer to the materials used in the cell manufacturing process. For example, in the cell winding process, the corresponding cell materials include the positive electrode sheet, negative electrode sheet, and separator; in the cell welding process, the corresponding cell materials include the cell casing and tabs. The cell casing is fitted over the overall structure formed by winding the positive electrode sheet, negative electrode sheet, and separator. The positive and negative electrode sheets can use materials commonly used in lithium-ion batteries, such as lithium iron phosphate or nickel-cobalt-manganese ternary materials, the separator can be a polyolefin porous membrane, and the cell casing can be a stainless steel or aluminum alloy cylindrical shell.

[0036] A levitation magnetic field generator is a device capable of generating a levitation magnetic field, which controls the magnetic field that supports the levitation of a magnetorheological levitation platform. In this example, the levitation magnetic field generator includes a first electromagnetic coil disposed at the bottom of the magnetorheological levitation platform. By controlling the coil current of the first electromagnetic coil, the viscosity of the liquid on the magnetorheological levitation platform can be adjusted to provide support for the battery cell material placed on the magnetorheological levitation platform.

[0037] The microparticle injection mode includes a sealed container for containing the microparticle suspension, a nozzle connected to the sealed container, and a power mechanism connected to the nozzle, which may be, but is not limited to, a stepper motor. The microparticle suspension includes iron oxide particles and a dispersant, which may be, but is not limited to, an aqueous solution. In this example, the microparticle injection module can be a nanoparticle injection module for inputting the nanoparticle suspension, or a microparticle injection module for injecting a micron-sized particle suspension.

[0038] A gradient magnetic field generator is a device capable of generating a gradient magnetic field. For example, a gradient magnetic field generator includes two sets of second electromagnetic coils on a magnetorheological levitation platform. Specifically, a gradient magnetic field is generated by controlling the coil current of the second electromagnetic coils, which is used to control the distribution and positioning of iron oxide particles in a particulate suspension in subsequent steps.

[0039] A coherent photoacoustic coupler is a detection device that combines coherent optics with the photoacoustic effect. Its core advantage lies in enhancing signal specificity and anti-interference capability through optical coherence, and converting weak optical absorption signals from matter into precisely detectable acoustic signals using the photoacoustic effect. In this example, the coherent photoacoustic coupler includes a laser for emitting laser light, a piezoelectric transducer for generating acoustic pulses, and a photodiode array for acquiring coherent photoacoustic signals.

[0040] The acousto-optic resonant cavity feedback loop is a complex optical system integrating acousto-optic interaction, resonant cavity frequency selection, and feedback control. The acousto-optic resonant cavity feedback loop includes an acousto-optic resonant cavity and a photoelectric sensor disposed within it. The acousto-optic resonant cavity is a closed cavity structure located around the periphery of the cell manufacturing area. The cell manufacturing area is the processing space above the magnetorheological levitation platform. This acousto-optic resonant cavity can be rectangular or other shapes, with its inner wall coated with a high-reflectivity coating and its interior filled with a silicone oil medium. The resonant frequency is adjusted / tuned by the viscosity of the magnetorheological fluid to amplify the laser and acoustic signals of the coherent opto-acoustic coupler detector.

[0041] This application provides a method for processing battery cells, and the method is illustrated using an example of its application in a control device. Figure 5 As shown, the cell processing method includes: S1: Control the levitation magnetic field generator to form a levitation magnetic field, so that the magnetorheological levitation platform in the levitation magnetic field provides levitation support for the battery cell material, and control the processing equipment to process the battery cell material; S2: Control the gradient magnetic field generator to form a gradient magnetic field, induce the microparticle injection mode in the gradient magnetic field, inject the microparticle suspension into the target area corresponding to the cell material, and obtain the injection feedback signal. S3: Control the operation of the coherent photoacoustic coupling detector to acquire the phase shift signal during the cell material processing; S4: Adjust the control parameters of the processing equipment based on the injected feedback signal and the phase offset signal.

[0042] As an example, in step S1, during the processing of cylindrical battery cells, the battery cell material can be placed in the processing area of ​​the magnetorheological levitation platform. The control device adjusts the viscosity of the liquid on the magnetorheological levitation platform through the levitation magnetic field so that the magnetorheological levitation platform provides levitation support for the battery cell material.

[0043] In this example, a first electromagnetic coil is located at the bottom of the magnetorheological levitation platform. For instance, the first electromagnetic coil comprises multiple independently controlled coils. The first electromagnetic coil is supplied with coil current by a programmable power supply. The control device communicates with the programmable power supply and controls the programmable power supply to provide coil current to the first electromagnetic coil, thereby generating a levitation magnetic field. This levitation magnetic field can adjust the viscosity of the magnetorheological fluid within the magnetorheological levitation platform, providing levitation support for the battery cell material and preventing stress concentration caused by rigid clamping during battery cell material processing. Specifically, the viscosity formula for the magnetorheological fluid is: ,in, The viscosity of the magnetorheological fluid is denoted as . Zero field viscosity, The magnetorheological coefficient is 1. The magnetic field strength of the levitation magnetic field is determined based on the coil current of the first electromagnetic coil. In this example, the first electromagnetic coil is located at the bottom of the magnetorheological levitation platform and can be controlled in sections. It can adjust the magnetic field strength of different sections according to their needs, thereby adjusting the viscosity of the magnetorheological fluid in different sections of the magnetorheological levitation platform to achieve the effect of providing levitation support for the platform.

[0044] In this example, after the magnetorheological levitation platform provides levitation support for the battery cell material, the processing equipment is controlled to process the battery cell material placed on the magnetorheological levitation platform. The processing equipment here is matched with the processing steps of the cylindrical battery cell, and different processing equipment is used in different processing steps.

[0045] In this scenario, the tension detected in real time by the tension sensor is , For tension, Let A be the material stress and A be the cross-sectional area. The viscosity of the magnetorheological fluid is denoted as . The velocity gradient is then used; next, the tension sensor will collect the tension. The data is transmitted to the control device via Ethernet or other communication methods so that the control device can perform subsequent control.

[0046] As an example, in step S2, during the processing of the battery cell material placed on the magnetorheological levitation platform, a gradient magnetic field generator positioned around the platform is controlled to generate a gradient magnetic field. This induces a microparticle injection mode within the gradient magnetic field, injecting iron oxide particles from the microparticle suspension into the target area of ​​the battery cell material. This fills the gaps in the target area, enhances the bonding of the battery cell material, and helps ensure the quality of the finished cylindrical battery cell. In this example, the levitation support provided by the magnetorheological levitation platform and the gradient magnetic field generator induce the directional injection of iron oxide particles into the target area to solve the problem of uneven stress during traditional cylindrical battery cell processing, laying the foundation for subsequent inspection and repair.

[0047] In this example, the gradient magnetic field generator includes two symmetrically arranged sets of second electromagnetic coils, positioned on either side of the magnetorheological levitation platform. The control device communicates with a programmable power supply, which provides coil current to the first electromagnetic coil to adjust the gradient magnetic field strength generated by the generator. Specifically, the gradient magnetic field strength is... ,in, The gradient magnetic field strength, The permeability of free space, For coil current, Where is the radius of the coil.

[0048] In this example, the control device controls the nozzle of the microparticle injection mode to inject the microparticle suspension into the cell material at an injection rate of [missing information]. ,in, For injection rate, For the particle magnetic moment, The gradient magnetic field strength, For particle concentration, is the magnetic flux density.

[0049] This step works in conjunction with step S1. The magnetorheological levitation platform continues the initial magnetic field configuration, and the gradient magnetic field generator provides a positioning basis for nanoparticle injection. This step solves the problem of uneven stress during cell processing through levitation support and particle injection, laying the foundation for subsequent testing and repair.

[0050] As an example, in step S3, during the cell material processing, the coherent photoacoustic coupling detector mounted above the magnetorheological levitation platform is controlled to operate continuously to collect the phase shift signal during the cell material processing. Specifically, the laser is controlled to continuously emit laser light towards the cell material to ensure that it covers the surface of the cell material, and the piezoelectric transducer is controlled to emit acoustic pulses towards the cell material, so that both laser and acoustic signals are injected into the cell material. Then, the phase shift signal of the elastic wave-optical wave interaction response is collected by a photodiode array, and the presence of defects in the cell material processing is determined by the phase shift signal.

[0051] In this example, without considering the target region corresponding to the particulate suspension injected into the battery cell material, the initial phase shift signal detected by the coherent photoacoustic coupling detector is: ,in, This is the initial phase offset signal. The wavelength of the laser. For optical path difference, For the speed of sound waves, For time. Defects during the cell material processing can cause elastic wave disturbances, which can lead to optical path differences. The change causes a change in the detected phase shift signal. The change is therefore possible via the phase shift signal. Determine whether there are defects in the cell material processing, including but not limited to interlayer separation or microcracks.

[0052] Furthermore, during the cell material processing, the gradient magnetic field generator induces a microparticle injection mode to inject iron oxide particles into the target area corresponding to the cell material. Since the particle scattering coefficient of the iron oxide particles affects the phase shift, it is necessary to correct the phase shift signal based on the particle scattering coefficient of the iron oxide particles and determine the corrected phase shift signal. The calculation process is as follows: ,in, For the corrected phase offset signal, This is the initial phase offset signal. The particle scattering coefficient, For particle concentration, This represents the optical path difference. In this example, the corrected phase shift signal incorporates the relevant characteristics of iron oxide particles based on the phase shift signal, which helps to enhance the accuracy of defect identification.

[0053] As an example, in step S4, during the cell material processing, the control device will acquire the injection feedback signal output by the microparticle injection mode and the phase shift signal output by the coherent photoacoustic coupling detector in real time. Its built-in fractional derivative control algorithm processes the multi-mode feedback signals such as the injection feedback signal and the phase shift signal, and dynamically determines the control parameters of the processing equipment so that the processing equipment can work based on the new control parameters.

[0054] In this example, the control device is equipped with a fractional-order differential control algorithm, which is integrated into an embedded real-time operating system. During each processing step of the cylindrical battery cell, the control input and output of the processing device are dynamically acquired. Based on these inputs and outputs, a corresponding error signal is determined, allowing for dynamic adjustment of the control output. This control output serves as the control parameter of the processing device. In this example, the control output of the processing device is... ,in, To control the output, For error signals, , , These are the proportional coefficient, integral coefficient, and differential coefficient, respectively. , For fractional order, For fractional integral operators, This is a fractional differential operator.

[0055] In this embodiment, during the cylindrical cell manufacturing process, a levitation magnetic field generator is controlled to form a levitation magnetic field. A magnetorheological levitation platform within this magnetic field provides levitation support to the cell material and controls the processing equipment to process the material, thus solving the problem of uneven stress during traditional cylindrical cell manufacturing. A gradient magnetic field generator is controlled to induce a microparticle injection mode, directionally injecting iron oxide particles into the cell material to fill gaps and enhance structural stability. A phase shift signal detected by a coherent photoacoustic coupling detector captures the presence of defects during the manufacturing process. This allows for subsequent optimization of control parameters based on the phase shift signal and injection feedback signal, ensuring the quality of the cell material processing and contributing to the precision and quality of cylindrical cell manufacturing. The magnetorheological levitation platform, gradient magnetic field generator, microparticle injection mode, and coherent photoacoustic coupling detector work collaboratively, using a fractional-order differential control algorithm built into the control equipment for signal fusion feedback, forming a closed-loop control. This process, based on existing hardware and algorithm frameworks, can guarantee the precision and quality of cylindrical cell manufacturing.

[0056] This application provides a method for processing battery cells, which is illustrated using an example of a control device. The battery cell processing method includes: S11: Control the levitation magnetic field generator to form a levitation magnetic field, so that the magnetorheological levitation platform in the levitation magnetic field provides levitation support for the battery cell material, and control the winding equipment to wind the battery cell material, which includes positive electrode sheet, negative electrode sheet and separator. S12: Control the gradient magnetic field generator to form a gradient magnetic field, induce the microparticle injection mode in the gradient magnetic field, and inject iron oxide particles in the microparticle suspension into the interlayer gaps of the cell material. S13: Control the operation of the coherent photoacoustic coupling detector to determine the phase shift signal during the winding process of the battery cell material; S14: Adjust the winding speed of the winding equipment based on the injected feedback signal and the phase offset signal.

[0057] Steps S11-S14 are specific implementations of steps S1-S4, respectively.

[0058] As an example, in step S11, the cylindrical battery cell processing includes the crucial winding process. During the winding process, the battery cell materials, such as the positive electrode, negative electrode, and separator, need to be placed on a magnetorheological levitation platform. The control equipment controls the programmable power supply to adjust the coil circuit of the first electromagnetic coil and regulate the liquid viscosity of the magnetorheological levitation platform so that the magnetorheological levitation platform provides levitation support for the battery cell materials. The battery cell materials are then formed into four layers according to the sequence "positive electrode - separator - negative electrode - separator". One end of the four layers is fixed to the winding shaft, and the winding equipment controls the rotation of the winding shaft to drive the four layers of materials to be wound. In this example, the winding process of the cylindrical battery cell is carried out on the magnetorheological levitation platform, which can dynamically adjust the support force of the magnetorheological levitation platform to provide levitation support for the battery cell materials and prevent stress concentration caused by rigid clamping during the winding process.

[0059] As an example, in step S12, the nozzle of the microparticle injection mode is set above the winding shaft. A gradient magnetic field is formed by controlling the gradient magnetic field generator, and the nozzle of the microparticle injection mode is controlled to inject microparticle suspension into the cell material. This gradient magnetic field can induce the iron oxide particles in the microparticle suspension to distribute along the direction of the gradient magnetic field, so that the iron oxide particles are selectively injected into the interlayer gaps of the cell material to fill the micro gaps between the materials "positive electrode sheet-separator-negative electrode sheet-separator" and enhance the structural stability.

[0060] As an example, in step S13, during the winding process of the battery cell material, the coherent photoacoustic coupling detector mounted above the magnetorheological levitation platform is controlled to operate. Specifically, the laser is controlled to continuously emit laser light into the gap between the "positive electrode sheet-separator-negative electrode sheet-separator" to ensure that it covers the surface of the interlayer gap of the battery cell material. The piezoelectric transducer is controlled to emit acoustic pulses into the battery cell material so that both the laser signal and the acoustic signal are injected into the interlayer gap of the battery cell material. Then, the phase shift signal of the elastic wave-optical wave interaction response is collected by the photodiode array. The phase shift signal is used to determine whether there are defects in the winding process of the battery cell material, specifically identifying whether there are interlayer separation and microcrack defects between the "positive electrode sheet-separator-negative electrode sheet-separator".

[0061] As an example, in step S14, during the winding process of the cell material, the control device will acquire the injection feedback signal (including but not limited to the injection rate of the microparticle suspension) output by the microparticle injection mode and the phase shift signal output by the coherent photoacoustic coupling detector in real time. Based on the injection feedback signal and the phase shift signal, the winding speed of the winding device is dynamically determined so that the winding device can operate based on the new winding speed.

[0062] In this embodiment, during the winding process of the battery cell material, a magnetorheological levitation platform provides levitation support, and a gradient magnetic field generator operates to enable the particle injection mode to directionally inject iron oxide particles into the battery cell material to fill the interlayer gaps and enhance structural stability. The phase shift signal detected by the coherent photoacoustic coupling detector captures whether there are defects in the winding process, so that the winding speed can be optimized based on the phase shift signal and the injection feedback signal to ensure the processing quality of the battery cell material winding process, thereby helping to ensure the precision and quality of cylindrical battery cell manufacturing.

[0063] This application provides a method for processing battery cells, which is illustrated using an example of a control device. The battery cell processing method includes: S21: Control the levitation magnetic field generator to form a levitation magnetic field, so that the magnetorheological levitation platform in the levitation magnetic field provides levitation support for the battery cell material, and control the welding equipment to weld the battery cell material, which includes the battery cell shell and the electrode tab; S22: Control the gradient magnetic field generator to form a gradient magnetic field, induce the microparticle injection mode in the gradient magnetic field, and inject the iron oxide particles in the microparticle suspension into the welding gap corresponding to the cell material. S23: Control the operation of the coherent photoacoustic coupling detector to determine the phase shift signal during the cell material welding process; S24: Adjust the welding power of the welding equipment based on the injected feedback signal and the phase offset signal.

[0064] Steps S21-S24 are specific implementations of steps S1-S4, respectively.

[0065] The welding equipment is used to weld the battery cell casing to the electrode tab. As an example, the welding equipment includes a welding laser head.

[0066] As an example, in step S21, the cylindrical cell processing includes the key process of welding. During the cell welding process, the cell shell and electrode tabs and other cell materials need to be placed on the magnetorheological levitation platform. The control equipment controls the programmable power supply to adjust the coil circuit of the first electromagnetic coil and regulate the viscosity of the liquid on the magnetorheological levitation platform so that the magnetorheological levitation platform provides suspension support for the cell materials. The control equipment is also controlled to weld the cell shell and electrode tabs on the magnetorheological levitation platform.

[0067] As an example, in step S22, the nozzle of the particle injection mode is set near the welding laser head, and the gradient magnetic field generator is controlled to form a gradient magnetic field. The nozzle of the particle injection mode is controlled to inject a particle suspension into the cell material, so that the gradient magnetic field can induce iron oxide particles in the particle suspension to be selectively injected into the welding gap corresponding to the cell material. The welding gap here is the gap between the welding interface of the cell shell and the electrode, so as to enhance the welding strength between the cell shell and the electrode and help ensure the finished quality of the cylindrical cell.

[0068] As an example, in step S23, during the cell material welding process, the coherent photoacoustic coupling detector mounted above the magnetorheological levitation platform is controlled to operate. Specifically, the laser is controlled to continuously emit laser light towards the welding interface between the cell shell and the electrode, ensuring that it covers the gap between the welding interface of the cell shell and the electrode. The piezoelectric transducer is controlled to emit acoustic pulses towards the cell material, so that both the laser signal and the acoustic signal are injected into the gap between the welding interface of the cell shell and the electrode. Then, the phase shift signal of the elastic wave-optical wave interaction response is collected by the photodiode array. The phase shift signal is used to determine whether there are defects in the cell material welding process, specifically identifying whether there are defects in the welding interface between the cell shell and the electrode.

[0069] As an example, in step S24, during the cell material welding process, the control device will acquire the injection feedback signal output by the microparticle injection mode and the phase shift signal output by the coherent photoacoustic coupling detector in real time. Based on the injection feedback signal and the phase shift signal, the welding power of the welding equipment is dynamically determined so that the welding equipment can operate based on the new welding power.

[0070] In this embodiment, during the cell material welding process, a magnetorheological levitation platform provides levitation support, and a gradient magnetic field generator operates to enable the particle injection mode to directionally inject iron oxide particles into the cell material to fill the microscopic gaps between the welding interfaces of the cell material and enhance structural stability. The phase shift signal detected by the coherent photoacoustic coupling detector captures whether there are defects in the welding process, so that the welding power can be optimized based on the phase shift signal and the injection feedback signal to ensure the processing quality of the cell material welding process, thereby helping to ensure the precision and quality of cylindrical cell manufacturing.

[0071] In one embodiment, step S4, namely adjusting the control parameters of the processing equipment based on the injected feedback signal and the phase offset signal, includes: S41: Obtain the resonant feedback signal from the cell manufacturing area collected by the acoustic-optic resonant cavity feedback loop. The cell manufacturing area is the processing space above the magnetorheological levitation platform. S42: Adjust the control parameters of the processing equipment based on the injected feedback signal, phase offset signal, and resonant feedback signal.

[0072] As an example, when the battery cell processing system also includes an acousto-optic resonant cavity located around the battery cell manufacturing area and a photoelectric sensor located within the acousto-optic resonant cavity, since the acousto-optic resonant cavity is filled with a silicone oil medium, the resonant frequency is adjusted / tuned by the viscosity of the magnetorheological fluid to amplify the laser and acoustic signals of the coherent photoacoustic coupling detector. The amplified laser and acoustic signals can be collected by the photoelectric sensor and determined as the resonant feedback signal. This resonant feedback signal is sent to the control equipment so that it works in conjunction with the phase shift signal to more accurately reflect whether there are defects in the processing, thereby ensuring processing accuracy and quality. In this example, the resonant frequency of the acousto-optic resonant cavity can be determined by... Sure, The resonant frequency, The speed at which a signal propagates in a silicone oil medium. is the cavity length of the acousto-optic resonant cavity.

[0073] As an example, during the cell material processing, the control equipment acquires in real time the injection feedback signal output by the microparticle injection mode, the phase shift signal output by the coherent photoacoustic coupling detector, and the resonance feedback signal output by the acousto-optic resonant cavity feedback loop. The fractional-order differential control algorithm processes the multi-mode feedback signals such as the injection feedback signal, phase shift signal, and resonance feedback signal, and dynamically determines the control parameters of the processing equipment so that the processing equipment can operate based on the new control parameters, thereby ensuring processing accuracy and processing quality.

[0074] In one embodiment, the cell processing method further includes: S51: Acquire the signal-to-noise ratio signal of the coherent optoacoustic coupling detector; S52: Based on the signal-to-noise ratio signal, adjust the control parameters of the coherent opto-acoustic coupler detector and the resonant frequency of the acousto-optic resonant cavity feedback loop.

[0075] As an example, during the cell manufacturing process, in addition to acquiring the phase shift signal fed back by the coherent opto-acoustic coupler (COAC) detector, the control equipment also needs to acquire the signal-to-noise ratio (SNR) signal corresponding to the COAC detector. This SNR signal can be obtained through... It is confirmed that, among them, For signal-to-noise ratio, For signal power, This represents noise power. In this example, the noise power is... Based on ambient light interference and background acoustic noise, the signal power is determined. Measured by a photodiode array, the intensity can be based on the phase shift signal φ; the digital signal processor separates the phase shift signal φ using a fast Fourier transform. and And according to the separated and Calculate the SNR and finally output the calculated SNR to the control device.

[0076] As an example, the fractional-order differential control algorithm of the control device can process multi-mode feedback signals such as injected feedback signals, phase offset signals, resonant feedback signals, and signal-to-noise ratio signals, and dynamically adjust the control parameters of the coherent opto-acoustic coupling detector and the resonant frequency of the acousto-optic resonant cavity feedback loop to optimize the signal extraction capability and stability of both, thereby achieving high-precision and high-sensitivity measurement of the cell material during the processing.

[0077] In one embodiment, the cell processing method further includes: S61: Determine the location of the defect based on the phase shift signal; S62: Control the gradient magnetic field generator to form a local gradient magnetic field, induce the particle injection mode within the gradient magnetic field, inject the particle suspension into the defect area, perform defect repair verification based on the resonant feedback signal collected by the acousto-optic resonant cavity feedback loop, and output the repair verification result; and / or, control the heating unit corresponding to the defect area to heat.

[0078] As an example, the control device can assess whether there are defects in the battery cell material during the processing based on the phase shift signal collected by the coherent photoacoustic coupling detector. When it is determined that there are defects in the battery cell material during the processing, it is necessary to determine the area where the defects are located.

[0079] As an example, in step S62, the control device controls the local gradient magnetic field of the magnetorheological levitation platform. Specifically, it can provide coil current to two sets of second magnetic field coils around the magnetorheological levitation platform to form a local gradient magnetic field, inducing a microparticle injection mode within the gradient magnetic field, and filling the defect area with iron oxide particles from the microparticle suspension. In this example, the gradient magnetic field generator induces the nanoparticle flow velocity of the nanoparticles at a gradient magnetic field velocity of [value missing]. ,in, The flow velocity of nanoparticles, For local gradient magnetic field gradient, Let η be the particle magnetic moment and η be the fluid viscosity. Where is the particle radius.

[0080] As an example, after the iron oxide particles in the induced microparticle suspension fill the defect area, the control device also needs to acquire the resonant feedback signal collected by the acousto-optic resonant cavity feedback loop. Based on the resonant feedback signal, it verifies whether the defect has been repaired completely and outputs a repair verification result characterizing whether the defect has been repaired. In this example, the control device can verify the corrected phase shift signal based on the resonant feedback signal. Information such as stress deviation is collected, and when the preset repair success conditions are met, a repair verification result indicating repair completion is output; when the preset repair success conditions are not met, a repair verification result indicating repair failure is output.

[0081] As an example, after the control device determines the area where the defect is located based on the phase offset signal, it also needs to adjust the phase offset signal accordingly. A local heating command is determined, and the heating unit corresponding to the defect area outputs the command, causing it to respond and heat the area. In this example, the heating unit can be a resistance heating unit positioned below the magnetorheological levitation platform. It includes a ceramic heating element and a pulse-width modulated power supply connected to it. The ceramic heating element is at a certain distance from the surface of the battery cell material. The heat generated by the pulse-width modulated power supply to the ceramic heating element is radiated to the defect area via infrared radiation, causing the corresponding particulate suspension to undergo a self-healing reaction, thus achieving precise defect repair in the defective area.

[0082] In this example, after determining the defect repair area based on the phase offset signal, the defect closed-loop repair during the manufacturing process can be achieved through local gradient magnetic field control and / or heating assistance, which helps to ensure the processing accuracy and quality of the battery cell.

[0083] In one embodiment, the cell processing method includes: After the cylindrical cell is filled with electrolyte, the coherent photoacoustic coupling detector is controlled to scan the cylindrical cell, determine the cell scanning signal, and acquire the resonant feedback signal collected by the acousto-optic resonant cavity feedback loop. The integrity of the battery cell is verified based on the cell scanning signal and the resonant feedback signal, and the verification result is determined.

[0084] As an example, after the cylindrical battery cell has been filled with electrolyte—that is, after the electromagnetic fluid is injected into the cylindrical battery cell using an automated filling device—it is necessary to control a coherent photoacoustic coupling detector (CPCD) to scan the cylindrical battery cell, determine the cell scanning signal, and acquire the amplified resonant feedback signal output from the CPCD during the scanning process through an acousto-optic resonant cavity feedback loop. In this example, the cell scanning signal is... ,in, This is the cell scanning signal. For laser amplitude, The laser frequency, This is a phase shift signal. For sound wave amplitude, The frequency of the sound wave.

[0085] The control equipment also performs a comprehensive analysis based on the cell scanning signal output by the coherent photoacoustic coupling detector and the resonant feedback signal output by the acousto-optic resonant cavity feedback loop to evaluate whether the cylindrical cell meets the integrity requirements and determine the corresponding cell verification results.

[0086] In this example, after completing the winding, welding and scanning processes, the control equipment needs to record all control logs, including the winding speed, welding power and detected cell scanning signals.

[0087] This application embodiment also provides a battery cell processing apparatus 60, such as... Figure 6 As shown, it includes: The levitation processing module 61 is used to control the levitation magnetic field generator to form a levitation magnetic field, so that the magnetorheological levitation platform in the levitation magnetic field provides levitation support for the battery cell material, and controls the processing equipment to process the battery cell material. The gradient induction module 62 is used to control the gradient magnetic field generator to form a gradient magnetic field, induce the microparticle injection mode in the gradient magnetic field, inject the microparticle suspension into the target area corresponding to the cell material, and obtain the injection feedback signal. The coherent detection module 63 is used to control the operation of the coherent photoacoustic coupling detector and acquire the phase shift signal during the cell material processing. The parameter adjustment module 64 is used to adjust the control parameters of the processing equipment based on the injected feedback signal and the phase offset signal.

[0088] This application embodiment also provides a control device 70, such as Figure 7 As shown, it includes a memory 71 and a processor 72, wherein the memory 71 is used to store computer programs; the processor 72 is used to execute the programs stored in the memory 71 to implement the cell processing method described in any embodiment of this application.

[0089] This application embodiment also provides a battery cell processing system, including the above-mentioned magnetorheological levitation device, the above-mentioned control device, processing device, gradient magnetic field generator, microparticle injection mode, and coherent photoacoustic coupling detector; The processing equipment is set above the magnetorheological levitation platform and is used to process the battery cell material; The gradient magnetic field generator is located on the side of the magnetorheological levitation platform to generate a gradient magnetic field, and the particle injection mode is within the gradient magnetic field. The control equipment is connected to the levitation magnetic field generator, processing equipment, gradient magnetic field generator, particle injection mode, and coherent photoacoustic coupling detector.

[0090] Preferably, the battery cell processing system further includes an acousto-optic resonant cavity feedback loop, which includes an acousto-optic resonant cavity and a photoelectric sensor disposed within the acousto-optic resonant cavity. The acousto-optic resonant cavity is a closed cavity structure disposed around the battery cell manufacturing area, which is a processing space above the magnetorheological levitation platform. The photoelectric sensor is connected to the control equipment.

[0091] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the cell processing method described in any embodiment of this application.

[0092] In this application, "multiple" refers to two or more.

[0093] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0094] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0095] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0096] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the cell processing method includes steps A and B, it means that the cell processing method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the cell processing method may also include step C, it means that step C may be added to the cell processing method in any order. For example, the cell processing method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

[0097] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A magnetorheological levitation platform, characterized in that, Includes a support base, support structure, and worktable; The support base is provided with a fluid receiving groove and a magnetorheological fluid filled in the fluid receiving groove; The support structure includes a housing, a fluid channel disposed within the housing, and a sliding assembly; a first end of the fluid channel is connected to the fluid receiving tank, a second end of the fluid channel is connected to the first end of the sliding assembly, and the second end of the sliding assembly passes through the housing and is connected to the worktable; the magnetorheological fluid in the fluid channel, under the action of a magnetic field, controls the sliding assembly to move along the axial direction of the housing.

2. The magnetorheological levitation platform according to claim 1, characterized in that, The support base includes a base plate, a first support ring and a second support ring disposed on the base plate, the first support ring being located inside the second support ring, and the first support ring and the second support ring cooperating to form the fluid receiving groove; The first support ring is provided with a connecting channel that connects the fluid receiving groove and the fluid channel; The support structure is disposed between the first support ring and the worktable.

3. The magnetorheological levitation platform according to claim 1, characterized in that, The magnetorheological levitation platform includes a mounting plate fixedly disposed within the housing; The sliding assembly includes a sliding plate, a support plate, multiple support rods, and a connecting rod; the sliding plate is slidably disposed within the housing; the first end of each support rod is connected to a fluid channel, and the second ends of the multiple support rods are connected to the first surface of the sliding plate; the first end of the connecting rod is connected to the second surface of the sliding plate, and the second end of the connecting rod passes through the housing and is connected to the support plate, and the support plate is connected to the worktable; The fluid channel includes a main channel and multiple branch channels; the multiple branch channels are assembled on the mounting plate, and the first end of each of the multiple branch channels is connected to the fluid receiving groove through the main channel, and the second end of each branch channel is connected to a support rod.

4. A magnetorheological levitation device, characterized in that, Includes a levitation magnetic field generator and the magnetorheological levitation platform according to any one of claims 1-3; The levitation magnetic field generator is located below the magnetorheological levitation platform and is used to form a levitation magnetic field around the magnetorheological levitation platform.

5. A method for processing battery cells, characterized in that, include: The levitation magnetic field generator is controlled to form a levitation magnetic field, which enables the magnetorheological levitation platform within the levitation magnetic field to provide levitation support for the battery cell material, and the processing equipment is controlled to process the battery cell material. A gradient magnetic field generator is controlled to form a gradient magnetic field, which induces a microparticle injection mode within the gradient magnetic field. The microparticle suspension is then injected into the target area corresponding to the cell material, and an injection feedback signal is obtained. Control the operation of the coherent photoacoustic coupling detector to acquire the phase shift signal of the cell material processing process; The control parameters of the processing equipment are adjusted based on the injection feedback signal and the phase offset signal.

6. The cell processing method according to claim 5, characterized in that, The step of adjusting the control parameters of the processing equipment based on the injected feedback signal and the phase offset signal includes: The resonant feedback signal of the cell manufacturing area is acquired by the acoustic-optic resonant cavity feedback loop, wherein the cell manufacturing area is the processing space above the magnetorheological levitation platform; The control parameters of the processing equipment are adjusted based on the injected feedback signal, the phase offset signal, and the resonant feedback signal.

7. The cell processing method according to claim 6, characterized in that, The battery cell processing method further includes: Obtain the signal-to-noise ratio signal of the coherent optoacoustic coupling detector; Based on the signal-to-noise ratio signal, the control parameters of the coherent photoacoustic coupling detector and the resonant frequency of the acousto-optic resonant cavity feedback loop are adjusted.

8. The cell processing method according to claim 6, characterized in that, The battery cell processing method further includes: Based on the phase shift signal, the region where the defect is located is determined; A gradient magnetic field generator is controlled to form a local gradient magnetic field, which induces a microparticle injection mode within the gradient magnetic field. The microparticle suspension is injected into the defect area. The defect repair is verified based on the resonant feedback signal collected by the acousto-optic resonant cavity feedback loop, and the repair verification result is output. And / or, the heating unit corresponding to the defect area is controlled to heat.

9. The cell processing method according to claim 6, characterized in that, The battery cell processing method includes: After the cylindrical cell is filled with electrolyte, the coherent photoacoustic coupling detector is controlled to scan the cylindrical cell, determine the cell scanning signal, and acquire the resonant feedback signal collected by the acousto-optic resonant cavity feedback loop. The cell integrity is verified based on the cell scanning signal and the resonant feedback signal to determine the cell verification result.

10. A battery cell processing apparatus, characterized in that, include: The levitation processing module is used to control the levitation magnetic field generator to form a levitation magnetic field, so that the magnetorheological levitation platform within the levitation magnetic field provides levitation support for the battery cell material, and controls the processing equipment to process the battery cell material; The gradient induction module is used to control the gradient magnetic field generator to form a gradient magnetic field, induce the microparticle injection mode within the gradient magnetic field, inject the microparticle suspension into the target area corresponding to the cell material, and obtain the injection feedback signal. The coherent detection module is used to control the operation of the coherent photoacoustic coupling detector to acquire the phase shift signal during the processing of the battery cell material; The parameter adjustment module is used to adjust the control parameters of the processing equipment based on the injected feedback signal and the phase offset signal.

Images