A kind of hydrolysis-proof automated packaging equipment for lithium salt electrolyte

Abstract

The present application relates to lithium battery packaging technical field, specifically a kind of hydrolysis prevention automation packaging equipment of lithium salt electrolyte, including heat sealing support, the heat sealing support is fixedly installed in packaging cabin;The both ends of heat sealing support are equipped with limit sliding slot, two The limit sliding slot is slidably installed with lifting guide slide, the end of two The lifting guide slide is fixedly installed with lower heating plate and upper heating plate respectively;Hydraulic lifting system and monitoring control module are also provided on the heat sealing support;The hydraulic lifting system is connected with the lower heating plate and upper heating plate respectively;The monitoring control module is connected with the lower heating plate, upper heating plate and hydraulic lifting system respectively, the hydrolysis prevention automation packaging equipment of lithium salt electrolyte, multi-parameter dynamic optimization sealing quality, adaptive compensation equipment wear, to improve the packaging quality and effect.

Description

Technical Field

[0001] This invention relates to the field of lithium battery packaging technology, specifically to an automated packaging device for waterproofing lithium salt electrolyte. Background Technology

[0002] The automated lithium salt electrolyte waterproofing and packaging equipment operates in an ultra-low water and oxygen inert environment (dew point ≤ -40℃, oxygen content ≤ 1ppm). Its core process begins with rigorous pretreatment: the glove box or sealed chamber is purified by vacuum-argon circulation; the aluminum-plastic composite bottle (PET / Al / PE structure) is baked at 120℃ to remove moisture; a 20-30mm aluminum-plastic film extension at the bottle mouth serves as a sealing interface; the electrolyte is injected into the bottle under positive pressure protection of inert gas, leaving a liquid level space of at least 15mm. After filling, a mechanical folding mechanism folds the extension into a double-layer flat sealing wing, forming a heat-sealed area with the PE layer as the interface.

[0003] Hot-press sealing, as the core step, directly determines the success or failure of the encapsulation: the sealing wings are positioned at the double-heating plate station, the lower heating plate fixes and supports the lower layer of the sealing wings, and the vacuum suction hole adsorbs and flattens the film layer; the upper heating plate is pressed down under hydraulic or servo drive, clamping an 8-10mm wide area with a pressure of 0.3-0.5MPa. The two plates are simultaneously heated to 180-200℃, and the heat penetrates the PET / Al layer and is conducted to the PE layer, causing it to melt into a viscous flow state, achieving interpenetrating diffusion of molecular chains (depth 10-50μm). Subsequently, it is cooled and shaped under pressure to form a continuous and dense sealing layer (permeability ≤0.01g / m²·day). This sealing layer is the ultimate barrier to prevent water and oxygen penetration, and its peel strength must be ≥3N / 15mm (ASTM F88 standard). If micropores or weak adhesion exist in the heat seal, water and oxygen permeation will trigger a hydrolysis chain reaction of LiPF6 (LiPF6 + H2O → LiF + POF3 + 2HF), leading to an increase in electrolyte acidity and ultimately causing irreversible failures such as battery capacity decay, increased internal resistance, and gas bulging. After the heat-sealed container is verified by a laser headspace analyzer (H2O ≤ 10ppm, O2 ≤ 50ppm), it is placed in a vacuum-sealed aluminum foil bag filled with argon and supplemented with desiccant to form terminal protection. In this process, the heat-sealing quality is directly related to the electrolyte storage stability and battery performance, and is a decisive factor in the technological value of the equipment.

[0004] Currently, in the lithium salt electrolyte encapsulation process, traditional heat-sealing equipment suffers from insufficient melting depth and high microporosity in the sealing layer due to the inability to dynamically compensate for equipment wear (such as heating plate flatness deviation > 50 μm), environmental fluctuations (dew point > -35℃), and uneven temperature field of the sealing wings caused by the solidified parameters. At the same time, electrolyte residue (> 10 ppm) at the sealing wings decomposes and generates gas at high temperatures, further weakening the sealing strength and ultimately causing water and oxygen permeation and LiPF6 hydrolysis failure, which seriously affects battery performance and storage safety. Therefore, in view of the above situation, there is an urgent need to develop an automated encapsulation equipment for lithium salt electrolytes that is waterproof and resistant to hydrolysis, in order to overcome the shortcomings in current practical applications. Summary of the Invention

[0005] The purpose of this invention is to provide an automated packaging device for waterproofing lithium salt electrolytes, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A waterproof automated packaging device for lithium salt electrolyte includes a heat-sealing bracket, which is fixedly installed inside the packaging chamber.

[0008] Both ends of the heat-sealing bracket are provided with limit grooves, and lifting guide slides are slidably installed in both limit grooves. The ends of the two lifting guide slides are respectively fixedly installed with a lower heating plate and an upper heating plate, with the lower heating plate facing the upper heating plate.

[0009] The heat-sealing bracket is also equipped with a hydraulic lifting system and a monitoring and control module;

[0010] The hydraulic lifting system is connected to the lower heating plate and the upper heating plate respectively, and is used to drive the lower heating plate and the upper heating plate to move in opposite directions at the same time;

[0011] The monitoring and control module is communicatively connected to the lower heating plate, the upper heating plate, and the hydraulic lifting system, and is configured to acquire sealing status parameters in real time through multi-sensor fusion, and dynamically adjust the clamping pressure, heat sealing time, and heating temperature of the lower heating plate and the upper heating plate according to the monitoring data.

[0012] As a further aspect of the present invention: the monitoring and control module includes:

[0013] A laser displacement sensor is mounted on the heat-sealing bracket and located at the reset position of the lower heating plate and the upper heating plate. It is used to scan the surfaces of the lower heating plate and the upper heating plate and output flatness deviation data.

[0014] An infrared thermal imager is located on the heat-sealing bracket and mounted above the heat-sealing station to acquire real-time temperature distribution maps of the sealing wings.

[0015] A quartz crystal microbalance, integrated into the inner wall of the encapsulated chamber, is used to monitor the amount of moisture adsorbed in the environment and convert it into a dew point value.

[0016] An edge computing unit, located on the heat-sealed bracket and communicatively connected to each sensor, is used to perform the following operations:

[0017] The wear compensation temperature ΔT and compensation pressure ΔP are calculated based on the flatness deviation data, where ΔT = k1·δ 2 δ is the wear depth, and k1 is the thermal conductivity compensation coefficient;

[0018] By comparing the proportion of the area above 180°C in the telescopic tube in the temperature distribution diagram with the set threshold, the heat sealing time is dynamically adjusted.

[0019] A cooling rate control command is generated based on the dew point value;

[0020] And a servo driver, which receives output commands from the edge computing unit and controls the clamping pressure, heat sealing time and cooling rate of the lower heating plate and the upper heating plate.

[0021] As a further aspect of the present invention: both the lower heating plate and the upper heating plate are provided with heat-sealing openings;

[0022] The lower heating plate and the upper heating plate are both made of copper alloy, and the heat-sealed part is composed of an intermediate elastic layer and a surface soft layer.

[0023] The intermediate elastic layer is made of silicone or fluororubber to compensate for unevenness in the tab area; the surface soft layer is made of PEEK film to conduct heat evenly and avoid local over-melting.

[0024] As a further aspect of the present invention, it also includes: a T-shaped limiting plate, wherein there are multiple T-shaped limiting plates, and the multiple T-shaped limiting plates are respectively located at the edge positions of the lower heating plate and the upper heating plate;

[0025] The extension and retraction of the multiple T-shaped limiting plates on the lower heating plate and the upper heating plate are controlled by hydraulic control devices provided on the lower heating plate and the upper heating plate;

[0026] Furthermore, the T-shaped limiting plates located on the lower heating plate and the upper heating plate are respectively arranged opposite each other. When the lower heating plate and the upper heating plate are in contact for heat sealing, the two T-shaped limiting plates arranged opposite each other are in contact to limit the clamping height between the lower heating plate and the upper heating plate.

[0027] And a position detector, which is located on the T-shaped limit plate and is signal-connected to the monitoring and control module.

[0028] As a further aspect of the present invention, it also includes a vibration cleaning control mechanism, which is connected to the heat-sealing bracket and the lifting guide slide plate respectively, and is signal-connected to the monitoring and control module;

[0029] The number of the shaking cleaning control mechanism is two sets, and the two sets of shaking cleaning control mechanism have the same structure and are respectively set close to the lower heating plate and the upper heating plate;

[0030] Before the lower heating plate and the upper heating plate are heat-sealed, the shaking cleaning control mechanism is used to shake and remove the electrolyte accumulated at the sealing wing.

[0031] As a further aspect of the present invention: the vibration cleaning control mechanism includes:

[0032] A support baffle is fixedly installed on the lifting guide slide plate. When the lower heating plate and the upper heating plate are not in operation, the support baffle abuts against the heat sealing bracket to form a limiting protection.

[0033] A telescopic tube, one end of which passes through the support baffle and is slidably connected to the support baffle, and a cleaning control cone is fixedly installed at the other end of the telescopic tube, with a spring provided between the cleaning control cone and the support baffle;

[0034] The telescopic tube is sleeved inside the spring;

[0035] A vibration module is located on the cleaning control cone and is signal-connected to the monitoring and control module. Before the lower heating plate and the upper heating plate are heat-sealed, the vibration module contacts the sealing wing.

[0036] And a separation drive assembly, which is connected to the heat sealing bracket, the cleaning control cone and the telescopic tube respectively, and is used to pull the two oppositely arranged vibration modules to separate from the sealing wings when the lower heating plate and the upper heating plate are about to contact the sealing wings.

[0037] As a further aspect of the present invention: the separation drive component includes:

[0038] An auxiliary support, one end of which is fixedly installed on the heat-sealing support, and the other end of which is fixedly installed with an automatic winding device;

[0039] A limiting horizontal plate is fixedly installed on the telescopic tube, and a through hole is provided in the middle of the limiting horizontal plate;

[0040] And an asynchronous control pull rope, one end of which is fixedly connected to the cleaning control cone block, and the other end of which passes through the support baffle and the through hole and is connected to the automatic winding device.

[0041] As a further aspect of the present invention, it also includes: a jet head, wherein the number of the jet heads is multiple, the multiple jet heads are evenly distributed on the cleaning control cone block, and are connected to the telescopic tube through a channel opened on the cleaning control cone block;

[0042] The telescopic pipe is connected to an external air source;

[0043] A detection receiving groove is formed within the limiting slide groove, and a rolling detection wheel is rotatably installed within the detection receiving groove. The rolling detection wheel is connected to an external air source signal.

[0044] A portion of the rolling detection wheel extends into the limiting groove;

[0045] The system also includes a control component, which is connected to the heat-sealing bracket and the lifting guide slide plate, and is signal-connected to the monitoring and control module to control the start and stop of the rolling detection wheel.

[0046] As a further aspect of the present invention: the control component includes:

[0047] A contact control groove is formed on one side wall of the lifting guide slide plate, and the width of the contact control groove is greater than the length of the rolling detection wheel;

[0048] A driving airbag, wherein there are multiple driving airbags, and all of the multiple driving airbags are located within the contact control groove;

[0049] When the driving airbag is in the contracted state, the driving airbag does not contact the rolling detection wheel. At this time, the rolling detection wheel is in a stopped state and the external air source is in a closed state.

[0050] When the driving airbag is inflated, the driving airbag contacts the rolling detection wheel and drives the rolling detection wheel to rotate during the movement of the lifting guide slide. At this time, the external air source is in the open state.

[0051] The system also includes a suction control air pump, which is fixedly mounted on the heat-sealing bracket and connected to the monitoring and control module via a hose.

[0052] Compared with the prior art, the beneficial effects of the present invention are:

[0053] 1. Multi-parameter dynamic optimization of sealing quality: By integrating laser displacement sensor, infrared thermal imager, and quartz micro balance for monitoring, the wear compensation temperature (ΔT=k1·δ²) is calculated in real time, and the heat sealing time and cooling rate are adjusted to ensure that the permeability of the sealing layer is stably ≤0.01g / m²·day, and the defect rate is reduced from 0.5% to 0.05%;

[0054] 2. Adaptive compensation for equipment wear: Automatically increases heating temperature based on wear depth δ (e.g., compensates ΔT=15℃ when δ=100μm), maintains PE melting depth ≥50μm, and extends heating plate life (reduces replacement frequency).

[0055] 3. Intelligent response to environmental dew point: The cooling rate is dynamically controlled based on the dew point value to avoid water vapor condensation when the dew point is > -35℃, thus blocking the hydrolysis chain reaction of LiPF6.

[0056] 4. Innovative heating plate structure solves the problem of electrode tab sealing: a three-layer design of copper alloy substrate + fluororubber elastic layer + PEEK film: the elastic layer compensates for the gap between the electrode tabs (compression ratio 20-30%); the PEEK film conducts heat uniformly and eliminates local over-melting; it increases the shear strength of the fusion interface by 40% and makes the micro-air gap close to zero.

[0057] 5. Precision clamping pressure control: The clamping height of the T-type limit plate is hydraulically adjusted (tolerance ≤ 0.05mm), and the output is dynamically optimized by the pressure sensor, reducing the standard deviation of the sealing strip pressure distribution to 0.03Mpa;

[0058] 6. Highly efficient removal of electrolyte residue: The vibration cleaning mechanism uses 40kHz vibration to peel off the electrolyte from the sealing wings, and the 15° tilt position guides the backflow, reducing the contamination concentration to below 3ppm; Argon gas blowing (20L / min) further removes vapors and avoids high-temperature gas generation micropores.

[0059] 7. Seamless connection of timing control processes: The vibration module is precisely withdrawn 5mm before heat sealing to avoid interference with positioning; the entire process of cleaning-separation-heat sealing is completed within 200ms.

[0060] 8. Mechanical gas circuit coordinated triggering: The rolling detection wheel is triggered to rotate by the expansion of the drive airbag, which in turn activates the argon gas injection, eliminating electrical control delay and ensuring synchronous action. Attached Figure Description

[0061] Figure 1 This is a three-dimensional structural diagram of the heat-sealing bracket in an embodiment of the present invention.

[0062] Figure 2 This is a three-dimensional structural diagram of the cleaning control cone block in an embodiment of the present invention.

[0063] Figure 3This is a three-dimensional structural diagram of the limiting slide groove in an embodiment of the present invention.

[0064] Figure 4 This is a three-dimensional structural diagram of the rolling detection wheel in an embodiment of the present invention.

[0065] Figure 5 This is a three-dimensional structural diagram of the auxiliary support in an embodiment of the present invention.

[0066] Figure 6 This is a three-dimensional structural diagram of the lifting guide slide plate in an embodiment of the present invention.

[0067] Figure 7 This is a three-dimensional structural diagram of the distribution of driving airbags in an embodiment of the present invention.

[0068] Figure 8 This is a three-dimensional structural diagram of the heat-sealed part in an embodiment of the present invention.

[0069] Figure 9 This is a three-dimensional structural diagram of the vibration module in an embodiment of the present invention.

[0070] Figure 10 This is a three-dimensional structural diagram of the lower heating plate in an embodiment of the present invention.

[0071] Figure 11 This is a three-dimensional structural diagram of the T-shaped limiting plate in an embodiment of the present invention.

[0072] In the diagram: 1-Heat-sealing bracket, 2-Auxiliary bracket, 3-Lower heating plate, 4-Upper heating plate, 5-Lifting guide slide, 6-Asynchronous control pull rope, 7-Support baffle, 8-Cleaning control cone, 9-Suction control air pump, 10-Hose, 11-Hydraulic lifting system, 12-Limiting slide groove, 13-Detection receiving groove, 14-Rolling detection wheel, 15-Automatic winding equipment, 16-Limiting horizontal plate, 17-Through hole, 18-Telescopic tube, 19-Spring, 20-Air jet head, 21-Hydraulic control equipment, 22-Contact control groove, 23-Drive airbag, 24-T-shaped limit plate, 25-Position detector, 26-Heat-sealing part, 27-Vibration module. Detailed Implementation

[0073] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0074] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0075] Please see Figures 1-11 This invention provides an automated packaging device for waterproofing lithium salt electrolyte, comprising a heat-sealing bracket 1 fixedly installed inside a packaging chamber. Limiting grooves 12 are formed at both ends of the heat-sealing bracket 1, and lifting guide slide plates 5 are slidably installed within each of the two limiting grooves 12. A lower heating plate 3 and an upper heating plate 4 are fixedly installed at the ends of the two lifting guide slide plates 5, with the lower heating plate 3 facing the upper heating plate 4. A hydraulic lifting system 11 and a monitoring and control module are also provided on the heat-sealing bracket 1. The hydraulic lifting system 11 is connected to the lower heating plate 3 and the upper heating plate 4 respectively, and is used to drive the lower heating plate 3 and the upper heating plate 4 to move simultaneously towards or in opposite directions. The monitoring and control module is communicatively connected to the lower heating plate 3, the upper heating plate 4, and the hydraulic lifting system 11, and is configured to acquire sealing status parameters in real time through multi-sensor fusion, and dynamically adjust the clamping pressure, heat-sealing time, and heating temperature of the lower heating plate 3 and the upper heating plate 4 based on the monitoring data.

[0076] During the encapsulation process of lithium salt electrolyte, the hydraulic lifting system 11 can push the lower heating plate 3 and the upper heating plate 4 to move towards each other. The hydraulic lifting system 11 can be a commonly used drive device in the existing lithium battery encapsulation production process, and no specific limitation is made here. At this time, the lifting guide slide plate 5 will slide in the limiting slide groove 12 to ensure the smooth movement of the lower heating plate 3 and the upper heating plate 4. When both the lower heating plate 3 and the upper heating plate 4 are in contact with the sealing wing, the encapsulation operation can be achieved by heating.

[0077] Furthermore, existing lithium salt electrolyte encapsulation technologies often suffer from sealing failure due to environmental fluctuations and equipment aging. This solution, however, pioneers a multi-parameter collaborative control mechanism: the monitoring and control module collects key parameters in real time, such as the heating plate wear depth δ (laser displacement sensor), the sealing wing temperature field (infrared thermal imager), and the environmental dew point (quartz microbalance). The edge computing unit then dynamically compensates for process parameters according to a preset algorithm. When a flatness deviation >50μm is detected, the heating temperature is automatically increased by 15-20℃ to compensate for heat conduction loss; when the dew point >-35℃, the cooling rate is reduced to prevent water vapor condensation. This closed-loop control ensures a stable sealing layer permeability ≤0.01g / m²·day, overcoming the limitations of traditional equipment that relies on manual parameter adjustment.

[0078] In one embodiment of the present invention, the monitoring and control module includes: a laser displacement sensor, disposed on the heat-sealing bracket 1 and located at the reset position of the lower heating plate 3 and the upper heating plate 4, for scanning the surfaces of the lower heating plate 3 and the upper heating plate 4 and outputting flatness deviation data; an infrared thermal imager, located on the heat-sealing bracket 1 and mounted above the heat-sealing position, for acquiring the temperature distribution map of the sealing wing in real time; a quartz crystal microbalance, integrated into the inner wall of the encapsulation chamber, for monitoring the amount of environmental moisture adsorption and converting it into a dew point value; and an edge computing unit, located on the heat-sealing bracket 1 and communicatively connected to each sensor, for performing the following operations: calculating the wear compensation temperature ΔT and the compensation pressure ΔP based on the flatness deviation data, where ΔT = k1·δ 2 δ is the wear depth, k1 is the thermal conductivity compensation coefficient; the heat sealing time is dynamically adjusted by comparing the proportion of areas above 180°C in the temperature distribution map with the set threshold; a cooling rate control command is generated based on the dew point value; and a servo driver receives the output command of the edge computing unit to control the clamping pressure, heat sealing time and cooling rate of the lower heating plate 3 and the upper heating plate 4.

[0079] This invention overcomes a long-standing technical challenge in lithium battery packaging: traditional equipment requires frequent replacement of worn clamps (approximately 2 million times / cycle) to ensure sealing strength. This solution, however, quantifies the wear depth δ using a laser displacement sensor and combines it with an experimentally verified quadratic compensation model (ΔT=0.15δ²) to achieve adaptive wear adjustment. For example, when δ=100μm, it automatically compensates ΔT=15℃, maintaining the PE layer melting depth above 50μm. Simultaneously, an infrared thermal imager monitors the temperature distribution; if the area above 180℃ accounts for less than 95%, the heat-sealing time is extended by 0.5s to ensure sufficient interpenetration of molecular chains. Compared to existing single-parameter control, this solution's multi-sensor fusion strategy reduces the sealing failure rate from 0.5% to 0.05%.

[0080] In one embodiment of the present invention, both the lower heating plate 3 and the upper heating plate 4 are provided with heat-sealing portions 26; wherein, both the lower heating plate 3 and the upper heating plate 4 are made of copper alloy, and the heat-sealing portion 26 is composed of an intermediate elastic layer and a surface soft layer; the intermediate elastic layer is made of silicone or fluororubber to compensate for unevenness in the tab area; the surface soft layer is made of PEEK film to uniformly conduct heat and avoid local over-melting.

[0081] To address the delamination issue caused by material heat capacity differences in the aluminum-plastic film tab region, this structure creatively employs a three-layer composite design: a copper alloy substrate (thermal conductivity 380 W / m·K) ensures overall thermal stability and structural strength; an intermediate fluororubber elastic layer (compression ratio 20-30%) adaptively fills the gaps between the tabs; and a PEEK surface layer (melting point 343℃) uniformly distributes heat. Experiments show that this structure increases the shear strength of the fusion interface by 40% and eliminates the micro-air gaps (<10 μm) generated in the tab region by traditional rigid plates, thus blocking the LiPF6 hydrolysis pathway at its source.

[0082] In one embodiment of the present invention, the invention further includes: a plurality of T-shaped limiting plates 24, wherein the plurality of T-shaped limiting plates 24 are respectively located at the edge positions of the lower heating plate 3 and the upper heating plate 4; the extension and retraction of the plurality of T-shaped limiting plates 24 on the lower heating plate 3 and the upper heating plate 4 are controlled by hydraulic control devices 21 provided on the lower heating plate 3 and the upper heating plate 4; and the T-shaped limiting plates 24 respectively located on the lower heating plate 3 and the upper heating plate 4 are arranged facing each other, and when the lower heating plate 3 and the upper heating plate 4 are in contact for heat sealing, the two T-shaped limiting plates 24 are in contact to limit the clamping height between the lower heating plate 3 and the upper heating plate 4; and a position detector 25, wherein the position detector 25 is located on the T-shaped limiting plates 24 and is signal-connected to the monitoring and control module.

[0083] Traditional heat sealing suffers from uneven pressure distribution due to clamping height deviation (>0.1mm). This solution achieves precise spacing control through an adjustable T-shaped limit plate 24: the hydraulic control device 21 drives the T-shaped limit plate 24 to extend and retract, and the position detector 25 provides real-time height data feedback to the monitoring and control module. When the T-shaped limit plate 24 contacts, it forms a physical stop, ensuring that the clamping height tolerance is ≤0.05mm. Simultaneously, combined with pressure sensor data, the hydraulic output is dynamically optimized (e.g., pressure increase in the edge area by 0.2MPa), reducing the standard deviation of the pressure distribution of the 8-10mm sealing strip from the traditional 0.15MPa to 0.03MPa.

[0084] In addition, under the control of the monitoring and control module, when the sealing status parameters change and it is necessary to adjust parameters such as clamping pressure, the extension and retraction of the T-shaped limit plate 24 can be adjusted synchronously by the hydraulic control device 21 to change the pressing distance, thereby ensuring the quality and effect of the sealing.

[0085] In one embodiment of the present invention, a shaking cleaning control mechanism is further included. The shaking cleaning control mechanism is connected to the heat sealing bracket 1 and the lifting guide slide plate 5 respectively, and is signal-connected to the monitoring and control module. There are two sets of shaking cleaning control mechanisms, and the two sets of shaking cleaning control mechanisms are identical in structure and are respectively located close to the lower heating plate 3 and the upper heating plate 4. Before the lower heating plate 3 and the upper heating plate 4 are heat-sealed, the shaking cleaning control mechanism is used to shake and remove the electrolyte accumulated at the sealing wing.

[0086] The vibration cleaning control mechanism includes: a support baffle 7, which is fixedly installed on the lifting guide slide plate 5. When the lower heating plate 3 and the upper heating plate 4 are not in operation, the support baffle 7 abuts against the heat sealing bracket 1 to form a limiting protection; a telescopic tube 18, one end of which passes through the support baffle 7 and is slidably connected to the support baffle 7, and the other end of which is fixedly installed with a cleaning control cone 8. A spring 19 is provided between the cleaning control cone 8 and the support baffle 7; wherein, the telescopic tube 18 is fitted inside the spring 19; a vibration module 27 is located on the cleaning control cone 8 and is signal-connected to the monitoring and control module. Before the lower heating plate 3 and the upper heating plate 4 are heat-sealed, the vibration module 27 contacts the sealing wing; and a separation drive assembly is connected to the heat-sealing bracket 1, the cleaning control cone 8 and the telescopic tube 18 respectively. The separation drive assembly is used to pull the two oppositely arranged vibration modules 27 to separate from the sealing wing when the lower heating plate 3 and the upper heating plate 4 are about to contact the sealing wing.

[0087] The separation drive assembly includes: an auxiliary support 2, one end of which is fixedly mounted on the heat-sealing support 1, and the other end of which is fixedly mounted with an automatic winding device 15; a limiting horizontal plate 16, which is fixedly mounted on the telescopic tube 18, and the limiting horizontal plate 16 has a through hole 17 in the middle; and an asynchronous control pull rope 6, one end of which is fixedly connected to the cleaning control cone 8, and the other end of which passes through the support baffle 7 and the through hole 17 and is connected to the automatic winding device 15.

[0088] Electrolyte residue is one of the main causes of heat-sealing failure (bonding strength decreases by 60% when contamination rate > 10 ppm). This invention activates a vibration module 27 before heat sealing to generate 40 kHz high-frequency vibration, causing electrolyte droplets to detach from the sealing wings. Combined with an inclined sealing station (15° angle), gravity guides the liquid backflow. Testing has shown that this can reduce the contamination concentration to below 3 ppm, preventing residual LiPF6 from decomposing at high temperatures and forming sealing micropores.

[0089] The cleaning process is precisely coordinated with the heat sealing action: when the lifting guide slide 5 moves to 5mm before the heat sealing station, the separation drive component pulls the cleaning control cone 8 through the asynchronous control pull rope 6 to overcome the tension of the spring 19 and retract, so that the vibration module 27 disengages from the sealing wing in advance. Specifically, before the lower heating plate 3 and the upper heating plate 4 approach each other and before they contact the sealing wing, the vibration modules 27 on the two opposing cleaning control cones 8 simultaneously contact both sides of the sealing wing. The monitoring control module controls the vibration frequency of the vibration module 27 based on the detected data, thereby fully removing the electrolyte accumulated on the sealing wing. As the lifting guide slide 5 continues to move (in the initial stage of contact between the vibration module 27 and the sealing wing, the spring 19 is relatively relaxed, at which point the vibration...), the vibration... With low dynamic intensity to avoid electrolyte splashing, as the support baffle 7 moves downward, it compresses the spring 19 and increases the pressure of the vibration control module 27 on the sealing wing, thus ensuring sufficient electrolyte removal under the strong vibration action in the short period later. Specifically, the lower heating plate 3 and the upper heating plate 4 continuously approach each other, and the automatic winding device 15 begins to wind up the asynchronous control rope 6 (the automatic winding device 15 can use existing winding equipment; when the lifting guide slide plate 5 moves upward, it winds up the slack asynchronous control rope 6 to avoid the slack asynchronous control rope 6 affecting the operation of other equipment). The asynchronous control rope 6 generates an upward pulling force on the cleaning control cone 8, thus disengaging the vibration module 27 from the sealing wing before the lower heating plate 3 and the upper heating plate 4 contact the sealing wing. This timing control avoids vibration interference with heat sealing positioning. Simultaneously, argon gas is introduced into the telescopic tube 18 to purge the sealing area (flow rate 20L / min), further removing residual electrolyte vapor. The entire process is completed within 200ms, seamlessly connecting to the heat sealing process.

[0090] In addition, the automatic winding device 15 can precisely control the displacement curve of the cleaning mechanism through asynchronous control of the pull rope 6: in the initial stage, it contacts the sealing wing at a low speed of 5mm / s to avoid splashing liquid; in the cleaning stage, it accelerates to 20mm / s for efficient vibration; and in the separation stage, it retracts quickly at 50mm / s. The through hole 17 design of the limiting plate 16 ensures that the pull rope's movement trajectory is without deviation, with a position repeatability accuracy of ±0.1mm. Compared with traditional cylinder drive, this solution eliminates the risk of sealing wing deformation caused by mechanical impact.

[0091] In one embodiment of the present invention, the invention further includes: a plurality of jet heads 20, which are evenly distributed on the cleaning control cone 8 and connected to the telescopic pipe 18 through a channel opened on the cleaning control cone 8; wherein the telescopic pipe 18 is connected to an external air source; a detection receiving groove 13, which is opened in the limiting slide groove 12, and a rolling detection wheel 14 is rotatably installed in the detection receiving groove 13, the rolling detection wheel 14 being signal-connected to an external air source; wherein a portion of the rolling detection wheel 14 extends into the limiting slide groove 12; and a control component, which is connected to the heat sealing bracket 1 and the lifting guide slide plate 5 respectively, and is signal-connected to the monitoring control module for controlling the start and stop of the rolling detection wheel 14.

[0092] The control components include: a contact control groove 22, which is formed on one side wall of the lifting guide slide plate 5, and the width of the contact control groove 22 is greater than the length of the rolling detection wheel 14; multiple drive airbags 23, all of which are located within the contact control groove 22; wherein, when the drive airbag 23 is in a contracted state, the drive airbag 23 does not contact the rolling detection wheel 14, and the rolling detection wheel 14 is in a stopped state, and the external air source is in a closed state; when the drive airbag 23 is in an inflated state, the drive airbag 23 contacts the rolling detection wheel 14, and drives the rolling detection wheel 14 to rotate during the movement of the lifting guide slide plate 5, and the external air source is in a closed state; and a suction control air pump 9, which is fixedly installed on the heat-sealing bracket 1 and is signal-connected to the monitoring and control module, and the suction control air pump 9 is also connected to the drive airbag 23 through a hose 10.

[0093] The jet head 20 and the rolling detection wheel 14 form a collaborative cleaning system: when the lifting guide slide plate 5 moves, the drive airbag 23 expands under pressure, pushing the rolling detection wheel 14 to rotate, triggering the air circuit switch to supply air to the telescopic tube 18. Argon gas forms a 15° conical air curtain through the jet head 20 to cover the sealing wing and blow away residual droplets.

[0094] Specifically, the suction control air pump 9 supplies air to the drive airbag 23 through the hose 10. The pressure is dynamically adjusted by the monitoring and control module based on the cleanliness of the sealing wing (the pressure increases to 0.3 MPa when contamination is severe). Throughout the heat-sealing process, the expansion and contraction of the drive airbag 23 allows control of the start and stop of the rolling detection wheel 14 at any time during the up-and-down movement of the lifting guide slide 5, thereby controlling the start and stop of the external air source and ultimately the blowing state of the sealing wing. For example, when the lifting guide slide 5 moves, the inflated drive airbag 23 and the rolling detection wheel 14 engage in frictional transmission, converting linear motion into rotational motion. When the rolling detection wheel 14 rotates, it triggers the air circuit switch to supply air to the telescopic tube 18. This mechanical triggering mechanism avoids electrical control delays and ensures strict synchronization between the air jet action and the mechanism's movement. After the heat sealing is completed, the lifting guide slide 5, which drives the lower heating plate 3 and the upper heating plate 4 to separate from the sealing wings, can also allow the jet head 20 to blow air to perform operations such as air cooling and impurity removal on the sealing part. The corresponding workflow can be designed according to actual needs, which will not be elaborated here. In addition, the inflatable drive airbag 23 can also restrict or brake the movement of the lifting guide slide 5 at a designated work position or in an emergency working state. For example, during the heat sealing process when the lifting guide slide 5 is stopped, the drive airbag 23 can be inflated and made to abut against a local position of the heat sealing bracket 1, thereby ensuring the stability of the heat sealing process under the action of compression. For example, in emergency situations such as the lower heating plate 3 and the upper heating plate 4 losing control of their movement, the expansion of the drive airbag 23 can brake the lifting guide slide 5 to ensure the safety performance of the entire heat sealing process, which will not be elaborated here.

[0095] It should be noted that, in this invention, unless otherwise explicitly specified and limited, the terms "sliding," "rotating," "fixed," and "equipped" should be interpreted broadly. For example, they can refer to welded connections, bolted connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0096] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automated packaging device for waterproofing lithium salt electrolyte, comprising a heat-sealing bracket, wherein the heat-sealing bracket is fixedly installed inside a packaging chamber, characterized in that: Both ends of the heat-sealing bracket are provided with limit grooves, and lifting guide slides are slidably installed in both limit grooves. The ends of the two lifting guide slides are respectively fixedly installed with a lower heating plate and an upper heating plate, with the lower heating plate facing the upper heating plate. The heat-sealing bracket is also equipped with a hydraulic lifting system and a monitoring and control module; The hydraulic lifting system is connected to the lower heating plate and the upper heating plate respectively, and is used to drive the lower heating plate and the upper heating plate to move in opposite directions at the same time; The monitoring and control module is communicatively connected to the lower heating plate, the upper heating plate, and the hydraulic lifting system, and is configured to acquire sealing status parameters in real time through multi-sensor fusion, and dynamically adjust the clamping pressure, heat sealing time, and heating temperature of the lower heating plate and the upper heating plate according to the monitoring data. The monitoring and control module includes: A laser displacement sensor is mounted on the heat-sealing bracket and located at the reset position of the lower heating plate and the upper heating plate. It is used to scan the surfaces of the lower heating plate and the upper heating plate and output flatness deviation data. An infrared thermal imager is located on the heat-sealing bracket and mounted above the heat-sealing station to acquire real-time temperature distribution maps of the sealing wings. A quartz crystal microbalance, integrated into the inner wall of the encapsulated chamber, is used to monitor the amount of moisture adsorbed in the environment and convert it into a dew point value. An edge computing unit, located on the heat-sealed bracket and communicatively connected to each sensor, is used to perform the following operations: The wear compensation temperature ΔT and compensation pressure ΔP are calculated based on the flatness deviation data, where ΔT = k1·δ 2 δ is the wear depth, and k1 is the thermal conductivity compensation coefficient; By comparing the proportion of areas above 180°C in the temperature distribution map with a set threshold, the heat sealing time is dynamically adjusted. A cooling rate control command is generated based on the dew point value; And a servo driver, which receives output commands from the edge computing unit and controls the clamping pressure, heat sealing time and cooling rate of the lower heating plate and the upper heating plate.

2. The automated packaging equipment for waterproofing lithium salt electrolyte according to claim 1, characterized in that, Both the lower heating plate and the upper heating plate are provided with heat-sealing openings; The lower heating plate and the upper heating plate are both made of copper alloy, and the heat-sealed part is composed of an intermediate elastic layer and a surface soft layer. The intermediate elastic layer is made of silicone or fluororubber to compensate for unevenness in the tab area; the surface soft layer is made of PEEK film to conduct heat evenly and avoid local over-melting.

3. The automated packaging equipment for waterproofing lithium salt electrolyte according to claim 2, characterized in that, Also includes: The T-shaped limiting plates are multiple in number, and the multiple T-shaped limiting plates are respectively located at the edge positions of the lower heating plate and the upper heating plate; The extension and retraction of the multiple T-shaped limiting plates on the lower heating plate and the upper heating plate are controlled by hydraulic control devices provided on the lower heating plate and the upper heating plate; Furthermore, the T-shaped limiting plates located on the lower heating plate and the upper heating plate are respectively arranged opposite each other. When the lower heating plate and the upper heating plate are in contact for heat sealing, the two T-shaped limiting plates arranged opposite each other are in contact to limit the clamping height between the lower heating plate and the upper heating plate. And a position detector, which is located on the T-shaped limit plate and is signal-connected to the monitoring and control module.

4. The automated packaging equipment for waterproofing lithium salt electrolyte according to claim 1, characterized in that, It also includes a vibration cleaning control mechanism, which is connected to the heat-sealing bracket and the lifting guide slide plate respectively, and is signal-connected to the monitoring and control module; The number of the shaking cleaning control mechanism is two sets, and the two sets of shaking cleaning control mechanism have the same structure and are respectively set close to the lower heating plate and the upper heating plate; Before the lower heating plate and the upper heating plate are heat-sealed, the shaking cleaning control mechanism is used to shake and remove the electrolyte accumulated at the sealing wing.

5. The automated packaging equipment for waterproofing lithium salt electrolyte according to claim 4, characterized in that, The vibration cleaning control mechanism includes: A support baffle is fixedly installed on the lifting guide slide plate. When the lower heating plate and the upper heating plate are not in operation, the support baffle abuts against the heat sealing bracket to form a limiting protection. A telescopic tube, one end of which passes through the support baffle and is slidably connected to the support baffle, and a cleaning control cone is fixedly installed at the other end of the telescopic tube, with a spring provided between the cleaning control cone and the support baffle; The telescopic tube is sleeved inside the spring; A vibration module is located on the cleaning control cone and is signal-connected to the monitoring and control module. Before the lower heating plate and the upper heating plate are heat-sealed, the vibration module contacts the sealing wing. And a separation drive assembly, which is connected to the heat sealing bracket, the cleaning control cone and the telescopic tube respectively, and is used to pull the two oppositely arranged vibration modules to separate from the sealing wings when the lower heating plate and the upper heating plate are about to contact the sealing wings.

6. The automated packaging equipment for waterproofing lithium salt electrolyte according to claim 5, characterized in that, The separation drive component includes: An auxiliary support, one end of which is fixedly installed on the heat-sealing support, and the other end of which is fixedly installed with an automatic winding device; A limiting horizontal plate is fixedly installed on the telescopic tube, and a through hole is provided in the middle of the limiting horizontal plate; And an asynchronous control pull rope, one end of which is fixedly connected to the cleaning control cone block, and the other end of which passes through the support baffle and the through hole and is connected to the automatic winding device.

7. The automated packaging equipment for waterproofing lithium salt electrolyte according to claim 5 or 6, characterized in that, Also includes: The jet head, there are multiple jet heads, the multiple jet heads are evenly distributed on the cleaning control cone block, and are connected to the telescopic tube through the channel opened on the cleaning control cone block; The telescopic pipe is connected to an external air source; A detection receiving groove is formed within the limiting slide groove, and a rolling detection wheel is rotatably installed within the detection receiving groove. The rolling detection wheel is connected to an external air source signal. A portion of the rolling detection wheel extends into the limiting groove; The system also includes a control component, which is connected to the heat-sealing bracket and the lifting guide slide plate, and is signal-connected to the monitoring and control module to control the start and stop of the rolling detection wheel.

8. The automated packaging equipment for waterproofing lithium salt electrolyte according to claim 7, characterized in that, The control component includes: A contact control groove is formed on one side wall of the lifting guide slide plate, and the width of the contact control groove is greater than the length of the rolling detection wheel; A driving airbag, wherein there are multiple driving airbags, and all of the multiple driving airbags are located within the contact control groove; When the driving airbag is in the contracted state, the driving airbag does not contact the rolling detection wheel. At this time, the rolling detection wheel is in a stopped state and the external air source is in a closed state. When the driving airbag is inflated, the driving airbag contacts the rolling detection wheel and drives the rolling detection wheel to rotate during the movement of the lifting guide slide. At this time, the external air source is in the open state. The system also includes a suction control air pump, which is fixedly mounted on the heat-sealing bracket and connected to the monitoring and control module via a hose.

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