Anti-hydrolysis automatic packaging equipment for lithium salt electrolyte

Abstract

The invention relates to the technical field of lithium battery packaging, in particular to hydrolysis-proof automatic packaging equipment for lithium salt electrolyte, which comprises a heat sealing bracket fixedly mounted in a packaging cabin; limiting sliding grooves are formed in the two ends of the heat sealing support correspondingly, lifting guide sliding plates are slidably mounted in the two limiting sliding grooves correspondingly, and a lower heating plate and an upper heating plate are fixedly mounted at the ends of the two lifting guide sliding plates correspondingly. The heat sealing support is further provided with a hydraulic lifting system and a monitoring control module. The hydraulic lifting system is respectively connected with the lower heating plate and the upper heating plate; the monitoring control module is in communication connection with the lower heating plate, the upper heating plate and the hydraulic lifting system.According to the hydrolysis-resistant automatic packaging equipment for the lithium salt electrolyte, the sealing quality is dynamically optimized through multiple parameters, equipment abrasion is compensated in a self-adaptive mode, and therefore the packaging quality and effect are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of lithium battery packaging, and particularly relates to a hydrolysis-proof automatic packaging equipment for lithium salt electrolyte. BACKGROUND

[0002] The lithium salt electrolyte hydrolysis-proof automatic packaging equipment runs in an ultralow water-oxygen inert environment (dew point <= -40 DEG C, oxygen content <= 1 ppm), and a core process thereof starts from strict pretreatment: a glove box or a sealed cabin is purified through vacuum-argon circulation, an aluminum-plastic composite bottle (PET / Al / PE structure) is dried by baking at 120 DEG C to remove water, a 20-30 mm aluminum-plastic film extension section reserved at a bottle opening is used as a sealing interface, and electrolyte is injected into the bottle under the protection of inert gas positive pressure and a liquid level space of more than 15 mm is reserved. After filling, a mechanical folding mechanism folds the extension section into double-layer flat sealing wings, and a heat sealing area with the PE layer as a boundary is formed.

[0003] As a core link, hot-press sealing directly determines the success or failure of packaging: the sealing wing is positioned to a double-heating plate station, the lower heating plate fixes and lifts the lower layer of the sealing wing, and a vacuum suction hole adsorbs the flat film layer; the upper heating plate is pressed under the drive of a hydraulic or servo drive, and a 8-10 mm wide area is clamped at a pressure of 0.3-0.5 MPa. The double plates are synchronously heated to 180-200 DEG C, heat penetrates through the PET / Al layer and is conducted to the PE layer, so that the PE layer is melted into a viscous flow state, molecular chain interpenetration diffusion (depth 10-50 um) is realized, and then a continuous and dense sealing layer (permeability <= 0.01 g / m2.day) is formed in a pressure maintaining state. The sealing layer is the ultimate barrier to block water and oxygen penetration, and the peel strength thereof needs to be >= 3 N / 15 mm (ASTM F88 standard). If there is a micropore or weak adhesion in the heat sealing, water and oxygen penetration will trigger a LiPF6 hydrolysis chain reaction (LiPF6+H2O->LiF+POF3+2HF), resulting in the increase of electrolyte acidity, and finally causing irreversible failure such as battery capacity attenuation, internal resistance increase and gas swelling. After the container completing the heat sealing is verified by a laser headspace analyzer (H2O <= 10 ppm, O2 <= 50 ppm), the container is loaded into an aluminum foil bag filled with argon and dry agent, and terminal protection is formed. The heat sealing quality in the process is directly related to the storage stability of the electrolyte and the battery performance, and is a decisive link of the equipment technical value.

[0004] At present, in the packaging process of lithium salt electrolyte, the traditional heat sealing equipment cannot dynamically compensate the equipment wear (such as the flatness deviation of the heating plate > 50 mu m), environmental fluctuations (dew point > -35 DEG C) and uneven temperature field of the sealing wing due to the parameter solidification, which leads to insufficient melting depth of the sealing layer, high microporosity, electrolyte residue (> 10 ppm) at the sealing wing decomposes to produce gas at high temperature, further weakens the sealing strength, and finally causes water and oxygen permeation and LiPF6 hydrolysis failure, which seriously affects the battery performance and storage safety. Therefore, in view of the above status, it is urgent to develop a hydrolysis-proof automatic packaging equipment for lithium salt electrolyte to overcome the shortcomings in the current actual application. SUMMARY

[0005] The purpose of the present application is to provide a hydrolysis-proof automatic packaging equipment for lithium salt electrolyte to solve the problems raised in the above background.

[0006] To achieve the above purpose, the present application provides the following technical scheme: A hydrolysis-proof automatic packaging equipment for lithium salt electrolyte, comprising a heat sealing support, the heat sealing support is fixedly installed in the packaging cabin; Two limit sliding grooves are formed at both ends of the heat sealing support, two lifting guide sliding plates are slidingly installed in the two limit sliding grooves, and the ends of the two lifting guide sliding plates are fixedly installed with a lower heating plate and an upper heating plate respectively, and the lower heating plate is opposite to the upper heating plate; The heat sealing support is also provided with a hydraulic lifting system and a monitoring control module; The hydraulic lifting system is connected with 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 towards or away from each other simultaneously; The monitoring control module is in communication connection with the lower heating plate, the upper heating plate and the hydraulic lifting system, and is configured to obtain the sealing state 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.

[0007] As a further scheme of the present application, the monitoring control module comprises: A laser displacement sensor is arranged on the heat sealing support and located at the reset station of the lower heating plate and the upper heating plate, and is used to scan the surface of the lower heating plate and the upper heating plate and output the flatness deviation data; An infrared thermal imager is located on the heat sealing support and is erected above the heat sealing station, and is used to obtain the temperature distribution map of the sealing wing in real time; A quartz crystal microbalance is integrated in the inner wall of the packaging cabin, and is used to monitor the adsorption amount of environmental moisture and convert it into dew point value; An edge computing unit is located on the heat sealing support and is in communication connection with each sensor, and is used to perform the following operations: According to the flatness deviation data, the wear compensation temperature ΔT and the compensation pressure ΔP are calculated, wherein ΔT=k1·δ 2 , δ is the wear depth, and k1 is the heat conduction compensation coefficient; Compare the area ratio of the region above 180 DEG C of the expansion tube in the temperature distribution map with the set threshold value, and dynamically adjust the heat sealing time; According to the dew point value, a cooling rate control instruction is generated; And a servo driver receives the output instruction of the edge computing unit and controls the clamping pressure, heat sealing time and cooling rate of the lower and upper heating plates.

[0008] As a further scheme of the application: the lower and upper heating plates are provided with heat sealing sealing portions; Wherein, the lower and upper heating plates are made of copper alloy material, and the heat sealing sealing portion is composed of an intermediate elastic layer and a surface soft layer; The intermediate elastic layer is made of silica gel or fluororubber material, which is used to compensate the unevenness of the tab area; the surface soft layer is made of PEEK film, which is used to uniformly conduct heat and avoid local over-melting.

[0009] As a further scheme of the application: further comprising: a plurality of T-shaped limiting plates, the plurality of T-shaped limiting plates are respectively located at the edge positions of the lower and upper heating plates; The expansion amount of the plurality of T-shaped limiting plates on the lower and upper heating plates is controlled by the hydraulic control device provided on the lower and upper heating plates; And the T-shaped limiting plates are respectively located opposite to each other between the lower and upper heating plates, and when the lower and upper heating plates are in contact for heat sealing, the two oppositely arranged T-shaped limiting plates are in contact, which is used to limit the clamping height between the lower and upper heating plates; And a position detector is located on the T-shaped limiting plate and is signal connected with the monitoring control module.

[0010] As a further scheme of the application: further comprising a shaking cleaning control mechanism, the shaking cleaning control mechanism is connected with the heat sealing support and the lifting guide slide respectively, and is signal connected with the monitoring control module; Wherein, the number of the shaking cleaning control mechanism is two sets, the two sets of shaking cleaning control mechanism are completely same in structure, and are respectively arranged close to the lower and upper heating plates; Before the lower and upper heating plates are heat sealed, the shaking cleaning control mechanism is used to shake and remove the electrolyte accumulated at the sealing wing.

[0011] As a further scheme of the present application, the shaking cleaning control mechanism comprises: A support baffle is fixedly installed on the lifting guide slide plate, and abuts against the heat sealing support to form a limit protection in a non-working state of the lower and upper heating plates. A telescopic pipe is arranged through the support baffle and is in sliding connection with the support baffle, and the other end of the telescopic pipe is fixedly installed with a cleaning control wedge, and a spring is arranged between the cleaning control wedge and the support baffle. The telescopic pipe is sleeved in the spring. A vibration module is arranged on the cleaning control wedge and is in signal connection with the monitoring control module, and the vibration module is in contact with the sealing wing before the lower and upper heating plates are heat sealed. A separation driving assembly is connected with the heat sealing support, the cleaning control wedge and the telescopic pipe, and is used to pull the two vibration modules arranged oppositely to separate the vibration modules from the sealing wing when the lower and upper heating plates are about to contact the sealing wing.

[0012] As a further scheme of the present application, the separation driving assembly comprises: An auxiliary support is fixedly installed at one end of the heat sealing support, and an automatic winding device is fixedly installed at the other end of the auxiliary support. A limit transverse plate is fixedly installed on the telescopic pipe, and a through hole is arranged in the middle of the limit transverse plate. An asynchronous control pull rope is fixedly connected at one end of the cleaning control wedge, and is connected with the automatic winding device after being arranged through the support baffle and the through hole.

[0013] As a further scheme of the present application, it further comprises: a plurality of air jet heads, the air jet heads are uniformly distributed on the cleaning control wedge and are in communication with the telescopic pipe through the channels arranged on the cleaning control wedge. The telescopic pipe is connected with an external air source. A detection containing groove is arranged in the limit sliding groove, and a rolling detection wheel is rotatably installed in the detection containing groove, and the rolling detection wheel is in signal connection with an external air source. Part of the rolling detection wheel is arranged in the limit sliding groove. A control assembly is connected with the heat sealing support and the lifting guide slide plate and is in signal connection with the monitoring control module, and is used to control the start and stop of the rolling detection wheel.

[0014] As a further scheme of the present application, the control assembly comprises: A contact control groove is formed on a 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 plurality of drive air bags are arranged in the contact control groove; When the drive air bag is in a contracted state, the drive air bag is not in contact with the rolling detection wheel, and at this time, the rolling detection wheel is in a stationary state, and an external air source is in a closed state; When the drive air bag is in an expanded state, the drive air bag is in contact with the rolling detection wheel, and drives the rolling detection wheel to rotate in the process of movement of the lifting guide slide plate, and at this time, the external air source is in an open state; And a suction control air pump is fixedly installed on the heat sealing support and is signal connected with the monitoring control module, and the suction control air pump is also connected with the drive air bag in communication through a hose.

[0015] Compared with the prior art, the present application has the following advantages: 1. Multi-parameter dynamic optimization of sealing quality: through the fusion monitoring of the laser displacement sensor, the infrared thermal imager and the quartz microbalance, the wear compensation temperature (ΔT=k1·δ²) is calculated in real time, the heat sealing time and the cooling rate are adjusted, the permeability of the sealing layer is stabilized to be ≤0.01 g / m²·day, and the defective rate is reduced from 0.5% to 0.05%; 2. Self-adaptive compensation of equipment wear: based on the wear depth δ, the heating temperature is automatically increased (for example, when δ=100 μm, the compensation ΔT=15℃), the PE melting depth is maintained to be ≥50 μm, and the service life of the heating plate is prolonged (the replacement frequency is reduced); 3. Intelligent response to environmental dew point: the cooling rate is dynamically controlled according to the dew point value, water vapor condensation is avoided when the dew point is greater than -35℃, and the chain reaction of LiPF6 hydrolysis is blocked; 4. Innovative heating plate structure solves the sealing difficulty of the tab: the three-layer design of the copper alloy base plate+fluorine rubber elastic layer+PEEK film: the elastic layer compensates the concave-convex gap of the tab (the compression rate is 20-30%); the PEEK film uniformly conducts heat and eliminates local over-melting; the shear strength of the fusion interface is increased by 40%, and the micro air gap approaches zero; 5. Precise clamping pressure control: the T-shaped limiting plate is hydraulically adjusted to clamp the height (the tolerance is ≤0.05 mm), and the output is dynamically optimized in combination with the pressure sensor, and the standard deviation of the sealing band pressure distribution is reduced to 0.03 Mpa; 6. Efficiently remove electrolyte residue: the shaking cleaning mechanism vibrates at 40 kHz to strip the electrolyte from the sealing wing, and the 15° inclined position guides the backflow, reducing the pollution concentration to below 3ppm; argon blowing (20L / min) further removes steam to avoid high-temperature gas production.

[0016] 7. Time sequence control seamless connection process: the separation drive assembly precisely withdraws the vibration module 5mm before heat sealing to avoid interference with positioning; the cleaning-separation-heat sealing whole process is completed within 200ms.

[0017] 8. Mechanical gas path coordination trigger: the rolling detection wheel is triggered to rotate by the inflation of the drive air bag, and the argon blowing is opened, eliminating the delay of electronic control and ensuring the synchronization of actions. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the heat sealing support in the embodiment of the application.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the cleaning control cone block in the embodiment of the application.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the limiting sliding groove in the embodiment of the application.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the rolling detection wheel in the embodiment of the application.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the auxiliary support in the embodiment of the application.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the lifting guide sliding plate in the embodiment of the application.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the drive air bag distribution in the embodiment of the application.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the heat sealing sealing portion in the embodiment of the application.

[0026] Figure 9 It is a schematic diagram of the three-dimensional structure of the vibration module in the embodiment of the application.

[0027] Figure 10 It is a schematic diagram of the three-dimensional structure of the lower heating plate in the embodiment of the application.

[0028] Figure 11 It is a schematic diagram of the three-dimensional structure of the T-shaped limiting plate in the embodiment of the application.

[0029] In the figure: 1-heat sealing support, 2- auxiliary support, 3- lower heating plate, 4- upper heating plate, 5- lifting guide slide, 6- asynchronous control pull rope, 7- support baffle, 8- cleaning control taper block, 9- suction control air pump, 10- hose, 11- hydraulic lifting system, 12- limit sliding groove, 13- detection containing groove, 14- rolling detection wheel, 15- automatic winding equipment, 16- limit cross plate, 17- through hole, 18- telescopic pipe, 19- spring, 20- air jet head, 21- hydraulic control equipment, 22- contact control groove, 23- driving air bag, 24- T-shaped limit plate, 25- position detector, 26- heat sealing sealing part, 27- vibration module. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] The specific implementation of the present application will be described in detail below in combination with specific embodiments.

[0032] Please refer to Figures 1-11 The waterproof hydrolysis automatic packaging equipment for lithium salt electrolyte provided by the embodiments of the present application comprises a heat sealing support 1, the heat sealing support 1 is fixedly installed in a packaging cabin, limit sliding grooves 12 are formed at both ends of the heat sealing support 1, lifting guide slides 5 are slidingly installed in the limit sliding grooves 12, lower heating plates 3 and upper heating plates 4 are fixedly installed at the ends of the lifting guide slides 5 respectively, and the lower heating plate 3 is arranged opposite to the upper heating plate 4. The heat sealing support 1 is further provided with a hydraulic lifting system 11 and a monitoring control module. The hydraulic lifting system 11 is connected with 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 towards each other or away from each other simultaneously. The monitoring control module is in communication connection with the lower heating plate 3, the upper heating plate 4 and the hydraulic lifting system 11 respectively, is configured to acquire sealing state parameters in real time through multi-sensor fusion, and dynamically adjusts the clamping pressure, heat sealing time and heating temperature of the lower heating plate 3 and the upper heating plate 4 according to the monitoring data.

[0033] In the process of packaging the 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, wherein the hydraulic lifting system 11 can adopt the driving device commonly used in the existing lithium battery packaging production process, which is not limited here, at this time, the lifting guide slide plate 5 will slide in the limiting slide groove 12 to ensure the stability of the movement of the lower heating plate 3 and the upper heating plate 4, and when the lower heating plate 3 and the upper heating plate 4 are in contact with the sealing wing, the sealing operation can be realized by heating. In addition, the existing lithium salt electrolyte packaging often causes sealing failure due to environmental fluctuations and equipment aging, and the present scheme innovatively uses a multi-parameter cooperative control mechanism: the monitoring control module collects key parameters 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) in real time, and dynamically compensates the process parameters according to the preset algorithm through the edge computing unit. When the flatness deviation is greater than 50 μm, the heating temperature is automatically increased by 15-20℃ to compensate for the heat conduction loss; when the dew point is greater than -35℃, the cooling rate is reduced to prevent water vapor condensation. This closed-loop control makes the sealing layer permeability stable ≤0.01 g / m²·day, breaking through the limitations of traditional equipment relying on manual parameter adjustment.

[0034] In an embodiment of the present application, the monitoring control module comprises: a laser displacement sensor arranged on the heat sealing support 1 and located at the reset station of the lower heating plate 3 and the upper heating plate 4, for scanning the surface 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 support 1 and arranged above the heat sealing station for real-time acquisition of the sealing wing temperature distribution map; a quartz crystal microbalance integrated in the inner wall of the packaging cabin for monitoring the amount of water adsorbed by the environment and converting it into a dew point value; an edge computing unit located on the heat sealing support 1 and communicatively connected to each sensor for performing the following operations: calculating the wear compensation temperature ΔT and compensation pressure ΔP according to the flatness deviation data, wherein ΔT=k1·δ 2 , δ is the wear depth, and k1 is the heat conduction compensation coefficient; comparing the area ratio above 180℃ in the temperature distribution map with the set threshold to dynamically adjust the heat sealing time; generating a cooling rate control instruction according to the dew point value; and a servo driver receiving the output instruction 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.

[0035] The present application overcomes the long-standing technical contradiction in the field of lithium battery packaging: the traditional equipment needs to frequently replace the worn clamping plate (about 200 million times / time) to ensure the sealing strength, and the present application realizes self-adaptive adjustment of wear through the laser displacement sensor to quantify the wear depth δ, combined with the quadratic compensation model (ΔT=0.15δ²) verified by experiments. For example, when δ=100μm, the automatic compensation ΔT=15℃, so that the PE layer melting depth is maintained above 50μm. At the same time, the infrared thermal imager monitors the temperature distribution, and if the area ratio above 180℃ is <95%, the heat sealing time is extended by 0.5s, ensuring that the molecular chains are fully interpenetrated. Compared with the existing single parameter control, the multi-sensor fusion strategy of the present application reduces the sealing failure rate from 0.5% to 0.05%.

[0036] In one embodiment of the present application, the lower heating plate 3 and the upper heating plate 4 are both provided with a heat sealing sealing portion 26; wherein the lower heating plate 3 and the upper heating plate 4 are both made of copper alloy material, the heat sealing sealing portion 26 is composed of an intermediate elastic layer and a surface soft layer; the intermediate elastic layer is made of silica gel or fluororubber material, used for compensating the unevenness of the tab area; the surface soft layer is made of PEEK film, used for uniformly conducting heat to avoid local over-melting.

[0037] In view of the fusion delamination problem of the aluminum-plastic film tab area caused by the material heat capacity difference, the present structure creatively adopts a three-layer composite design: the copper alloy substrate (thermal conductivity 380W / m·K) ensures the overall thermal stability and guarantees the overall structural strength; the intermediate fluororubber elastic layer (compression ratio 20-30%) adaptively fills the tab concave-convex gap; the PEEK surface layer (melting point 343℃) uniformly disperses heat. Experiments show that this structure improves the shear strength of the fusion interface by 40%, and eliminates the micro air gap (<10μm) generated by the traditional hard clamping plate in the tab area, thereby blocking the LiPF6 hydrolysis path from the root.

[0038] In one embodiment of the present application, it further includes: a plurality of T-shaped limiting plates 24, 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 expansion and contraction amounts of the plurality of T-shaped limiting plates 24 on the lower heating plate 3 and the upper heating plate 4 are controlled by the hydraulic control device 21 arranged 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 oppositely arranged, and when the lower heating plate 3 and the upper heating plate 4 are in contact for heat sealing, the two oppositely arranged T-shaped limiting plates 24 are in contact, used for limiting the clamping height between the lower heating plate 3 and the upper heating plate 4; and a position detector 25, the position detector 25 is located on the T-shaped limiting plate 24 and is signal connected with the monitoring control module.

[0039] The traditional heat sealing causes uneven pressure distribution due to clamping height deviation (>0.1mm), and the scheme realizes precise spacing control through the adjustable T-shaped limiting plate 24: the hydraulic control device 21 drives the T-shaped limiting plate 24 to stretch and retract, and the position detector 25 feeds back height data to the monitoring control module in real time. When the T-shaped limiting plate 24 is in contact, a physical stop is formed, ensuring that the clamping height tolerance is ≤0.05mm. At the same time, combined with the pressure sensor data, the hydraulic output is dynamically optimized (for example, the edge area pressure is increased by 0.2MPa), so that the standard deviation of the pressure distribution of the 8-10mm sealing band is reduced from the traditional 0.15MPa to 0.03Mpa. In addition, under the control of the monitoring control module, when the sealing state parameter changes and the clamping pressure and other parameters need to be adjusted, the stretching and retracting amount of the T-shaped limiting plate 24 can be adjusted synchronously through the hydraulic control device 21 to change the pressing spacing, so as to ensure the quality and effect of the packaging.

[0040] In an embodiment of the present application, a shaking cleaning control mechanism is further included, which is connected with the heat sealing support 1 and the lifting guide slide plate 5 respectively and is in signal connection with the monitoring control module; wherein the number of the shaking cleaning control mechanisms is two sets, the two sets of shaking cleaning control mechanisms are completely the same in structure and are arranged close to the lower heating plate 3 and the upper heating plate 4 respectively; before the heat sealing of the lower heating plate 3 and the upper heating plate 4, the shaking cleaning control mechanism is used for shaking and removing the electrolyte accumulated at the sealing wing.

[0041] The shaking cleaning control mechanism comprises: a supporting baffle 7, which is fixedly installed on the lifting guide slide plate 5 and abuts against the heat sealing support 1 to form limiting protection in a non-working state of the lower heating plate 3 and the upper heating plate 4; a telescopic pipe 18, one end of which penetrates through the supporting baffle 7 and is in sliding connection with the supporting baffle 7, and the other end of the telescopic pipe 18 is fixedly installed with a cleaning control taper block 8, and a spring 19 is arranged between the cleaning control taper block 8 and the supporting baffle 7; wherein the telescopic pipe 18 is sleeved in the spring 19; a vibration module 27, which is located on the cleaning control taper block 8 and is in signal connection with the monitoring control module, and contacts the sealing wing before the heat sealing of the lower heating plate 3 and the upper heating plate 4; and a separation driving assembly, which is connected with the heat sealing support 1, the cleaning control taper block 8 and the telescopic pipe 18 respectively and is used for pulling the two vibration modules 27 arranged oppositely away from the sealing wing when the lower heating plate 3 and the upper heating plate 4 are about to contact the sealing wing.

[0042] The separation drive assembly comprises: an auxiliary support 2, one end of the auxiliary support 2 is fixedly installed on the heat sealing support 1, and the other end of the auxiliary support 2 is fixedly installed with an automatic winding device 15; a limiting transverse plate 16, the limiting transverse plate 16 is fixedly installed on the telescopic pipe 18, and a through hole 17 is formed in the middle of the limiting transverse plate 16; and an asynchronous control pull rope 6, one end of the asynchronous control pull rope 6 is fixedly connected with the cleaning control taper block 8, and the other end of the asynchronous control pull rope 6 penetrates through the supporting baffle 7 and the through hole 17 and is connected with the automatic winding device 15.

[0043] The electrolyte residue is one of the main causes of heat sealing failure (the bonding strength decreases by 60% when the pollution rate is greater than 10 ppm). The vibration module 27 is started before heat sealing to generate 40 kHz high-frequency shaking, so that the electrolyte droplets at the sealing wing are separated. Combined with the inclined sealing station (15° inclination), the liquid backflow is guided by gravity. Tests show that the pollution concentration can be reduced to below 3 ppm, avoiding the decomposition of residual LiPF6 at high temperature to form sealed micro-holes; Through precise cooperation between the cleaning process and the heat sealing action: when the lifting guide slide plate 5 moves to the heat sealing station 5 mm in front, the separation drive assembly pulls the cleaning control taper block 8 through the asynchronous control pull rope 6 to overcome the spring 19 tension and retract, so that the vibration module 27 is separated from the sealing wing in advance. Before the lower heating plate 3 and the upper heating plate 4 approach each other and are not in contact with the sealing wing, the vibration modules 27 on the two cleaning control taper blocks 8 arranged oppositely will contact the two sides of the sealing wing at the same time, and the vibration frequency of the vibration module 27 can be controlled according to the detected data by the monitoring control module, so that the electrolyte accumulated on the sealing wing can be fully removed. With the continuous movement of the lifting guide slide plate 5 (the spring 19 is relatively loose at the initial stage of the contact between the vibration module 27 and the sealing wing, at this time the vibration intensity is smaller, avoiding the splashing of electrolyte, with the downward movement of the supporting baffle 7, the spring 19 will be compressed, and the pressure of the control vibration module 27 on the sealing wing will be increased, so that the electrolyte can be fully removed under the action of strong vibration for a short time in the later stage), that is, the lower heating plate 3 and the upper heating plate 4 continuously approach each other, the automatic winding device 15 starts to wind the asynchronous control pull rope 6 (the automatic winding device 15 can adopt the existing winding device, which winds the relaxed asynchronous control pull rope 6 when the lifting guide slide plate 5 moves upward, avoiding the influence of the relaxed asynchronous control pull rope 6 on other equipment), the asynchronous control pull rope 6 will generate an upward tension on the cleaning control taper block 8, so that the vibration module 27 is separated 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, and argon gas is introduced into the telescopic pipe 18 to blow the sealing area (flow rate 20 L / min), further removing the residual electrolyte vapor. The whole process is completed within 200 ms, seamlessly connecting the heat sealing process; In addition, the automatic winding device 15 can also accurately control the displacement curve of the cleaning mechanism by controlling the pull rope 6 asynchronously: in the initial stage, the low speed of 5 mm / s contacts the sealing wing to avoid splashing, in the cleaning stage, the speed is increased to 20 mm / s for efficient vibration, and in the separation stage, it is quickly withdrawn at 50 mm / s. The through hole 17 of the limiting horizontal plate 16 ensures that the movement trajectory of the pull rope is not deviated, and the position repeatability is ±0.1 mm. Compared with the traditional cylinder drive, this scheme eliminates the risk of sealing wing deformation caused by mechanical impact.

[0044] In one embodiment of the present application, it further comprises: a plurality of jet heads 20, which are uniformly distributed on the cleaning control block 8 and are connected with the telescopic pipe 18 through the channels opened on the cleaning control block 8; wherein the telescopic pipe 18 is connected with an external gas source; a detection containing groove 13 is opened in the limiting sliding groove 12, and a rolling detection wheel 14 is rotatably installed in the detection containing groove 13, and the rolling detection wheel 14 is signal connected with an external gas source; wherein a part of the rolling detection wheel 14 extends into the limiting sliding groove 12; and a control assembly is connected with the heat sealing support 1 and the lifting guide slide plate 5 respectively, and is signal connected with the monitoring control module, for controlling the start and stop of the rolling detection wheel 14.

[0045] The control assembly comprises: a contact control groove 22 is opened 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; a plurality of driving air bags 23 are located in the contact control groove 22; wherein when the driving air bag 23 is in a contracted state, the driving air bag 23 does not contact the rolling detection wheel 14, at this time, the rolling detection wheel 14 is in a stopped state, and the external gas source is in a closed state; when the driving air bag 23 is in an expanded state, the driving air bag 23 contacts the rolling detection wheel 14, and drives the rolling detection wheel 14 to rotate in the process of the movement of the lifting guide slide plate 5, at this time, the external gas source is in an open state; and a suction control air pump 9 is fixedly installed on the heat sealing support 1 and is signal connected with the monitoring control module, and the suction control air pump 9 is also connected with the driving air bag 23 through a hose 10.

[0046] The jet head 20 and the rolling detection wheel 14 constitute a cooperative cleaning system: when the lifting guide slide plate 5 moves, the driving air bag 23 is pressed to expand and push the rolling detection wheel 14 to rotate, triggering the air supply to the telescopic pipe 18. The argon gas forms a 15° conical air curtain covering the sealing wing through the jet head 20, and blows off the residual liquid drops.

[0047] Specifically, the suction control air pump 9 supplies air to the driving air bag 23 through the hose 10, and the pressure value is dynamically adjusted by the monitoring control module according to the cleanliness of the sealing wing (the pressure is increased to 0.3 MPa when the pollution is serious). During the entire heat sealing process, the expansion and contraction of the driving air bag 23 can be controlled to control the start and stop of the rolling detection wheel 14 at any time period when the lifting guide slide plate 5 moves up and down, thereby controlling the start and stop of the external air source and further controlling the blowing state of the sealing wing. For example, when the lifting guide slide plate 5 moves, the expanded driving air bag 23 frictionally drives the rolling detection wheel 14 to convert linear motion into rotary motion, and when the rolling detection wheel 14 rotates, the air supply to the telescopic pipe 18 is triggered. The mechanical triggering mechanism avoids electrical control delay and ensures that the air jet action is strictly synchronized with the mechanism movement. After the heat sealing is completed, the lifting guide slide plate 5 separates the lower heating plate 3 and the upper heating plate 4 from the sealing wing, and the air jet head 20 can also blow air to cool and remove impurities at the sealing position. The corresponding work flow can be designed according to actual needs, and will not be described in detail here. In addition, the expandable driving air bag 23 can also limit or brake the movement of the lifting guide slide plate 5 in the specified work station or emergency working state. For example, during the heat sealing process when the lifting guide slide plate 5 stops, the driving air bag 23 can be inflated to abut against a part of the heat sealing support 1, thereby ensuring the stability of the heat sealing process under the extrusion action. For example, in the case of emergency such as loss of control of the movement of the lower heating plate 3 and the upper heating plate 4, the expansion of the driving air bag 23 can brake the lifting guide slide plate 5 to ensure the safety performance of the entire heat sealing process. Details are not described here.

[0048] It should be noted that in the present application, unless otherwise specified and limited, the terms "sliding", "rotating", "fixed", "provided with" and the like should be understood broadly. For example, it can be a welded connection, or a bolted connection, or integrated; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of 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 those skilled in the art can understand.

Claims

1. A lithium salt electrolyte anti-hydrolysis automated packaging device, comprising a heat sealing bracket fixedly mounted in a packaging chamber, characterized in that: Both ends of the heat sealing bracket are provided with a limiting slide groove, and a lifting guide slide is slidably installed in the two limiting slide grooves. The ends of the two lifting guide slides are respectively fixedly installed with a lower heating plate and an upper heating plate, and the lower heating plate is arranged opposite to the upper heating plate; The heat sealing bracket is also provided with a hydraulic lifting system and a monitoring control module; Wherein, 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 toward or in opposite directions at the same time; The monitoring and control module is respectively communicated with the lower heating plate, the upper heating plate and the hydraulic lifting system, and is configured to obtain sealing state 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.

2. The water-proof automatic packaging equipment for lithium salt electrolyte according to claim 1, characterized in that: The monitoring and control module includes: a laser displacement sensor, disposed on the heat sealing bracket and located at the reset position of the lower heating plate and the upper heating plate, for scanning the surfaces of the lower heating plate and the upper heating plate and outputting flatness deviation data; An infrared thermal imager, located on the heat sealing bracket and mounted above the heat sealing station, is used to obtain a temperature distribution map of the sealing wing in real time; A quartz crystal microbalance, integrated into the inner wall of the packaging cabin, is used to monitor the amount of moisture adsorbed in the environment and convert it into a dew point value; An edge computing unit is located on the heat sealing bracket and is communicatively connected to each sensor 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, k1 is the thermal conductivity compensation coefficient; Compare the proportion of the area above 180°C in the telescopic tube in the temperature distribution diagram with the set threshold value, and dynamically adjust the heat sealing time; generating a cooling rate control instruction according to the dew point value; and a servo driver that receives output instructions 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.

3. The water-proof automatic packaging equipment for lithium salt electrolyte according to claim 1 or 2, characterized in that: The lower heating plate and the upper heating plate are both provided with heat sealing portions; The lower heating plate and the upper heating plate are both made of copper alloy, and the heat-sealing portion is composed of a middle elastic layer and a surface soft layer; The middle elastic layer is made of silicone or fluororubber to compensate for the unevenness of the tab area; the surface soft layer is made of PEEK film to evenly conduct heat and avoid local over-melting.

4. The water-proof automatic packaging equipment for lithium salt electrolyte according to claim 3, characterized in that: Also includes: T-shaped limiting plates, wherein the number of the T-shaped limiting plates is multiple, 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 contraction amounts of the plurality of T-shaped limit 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; The two T-shaped limit plates are respectively arranged opposite to each other between the lower heating plate and the upper heating plate. When the lower heating plate and the upper heating plate are in contact for heat sealing, the two T-shaped limit plates are in contact with each other 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.

5. The water-proof automatic packaging equipment for lithium salt electrolyte according to claim 1, characterized in that: It also includes a shaking cleaning control mechanism, which is connected to the heat sealing bracket and the lifting guide slide respectively, and is connected to the monitoring control module signal; There are two sets of the shaking cleaning control mechanisms, the structures of the two sets of shaking cleaning control mechanisms are exactly the same, and they are respectively arranged 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 clean the electrolyte accumulated at the sealing wings.

6. The water-proof automatic packaging equipment for lithium salt electrolyte according to claim 5, characterized in that: The vibration cleaning control mechanism includes: A support baffle, which is fixedly mounted on the lifting guide slide. 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 limit protection. a telescopic tube, one end of which passes through the support baffle and is slidably connected to the support baffle, and the other end of which is fixedly mounted with a cleaning control cone block, with a spring provided between the cleaning control cone block and the support baffle; Wherein, the telescopic tube is sleeved inside the spring; a vibration module, the vibration module being located on the cleaning control cone block and being signal-connected to the monitoring control module, and being in contact with the sealing wings before the lower heating plate and the upper heating plate perform heat sealing; And a separation drive assembly, which is respectively connected to the heat sealing bracket, the cleaning control cone block and the telescopic tube, and is used to pull the two relatively 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.

7. The water-proof automatic packaging equipment for lithium salt electrolyte according to claim 6, characterized in that: The separation drive assembly comprises: An auxiliary bracket, one end of the auxiliary bracket is fixedly mounted on the heat sealing bracket, and the other end of the auxiliary bracket is fixedly mounted with an automatic winding device; A limiting horizontal plate, the limiting horizontal plate is fixedly mounted on the telescopic tube, and a through hole is opened 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.

8. The water-proof automatic packaging equipment for lithium salt electrolyte according to claim 6 or 7, characterized in that: Also includes: There are multiple nozzles, and the nozzles are evenly distributed on the cleaning control cone block and connected to the telescopic tube through a channel opened on the cleaning control cone block; Wherein, the telescopic tube is connected to an external gas source; A detection accommodating groove is provided in the limiting slide groove, and a rolling detection wheel is rotatably installed in the detection accommodating groove, and the rolling detection wheel is connected to an external air source signal; Wherein, a portion of the rolling detection wheel extends into the limiting sliding groove; and a control component, wherein the control component is respectively connected to the heat sealing bracket and the lifting guide slide, and is connected to the monitoring control module signal, and is used to control the start and stop of the rolling detection wheel.

9. The water-proof automatic packaging equipment for lithium salt electrolyte according to claim 8, characterized in that: The control component includes: a contact control groove, the contact control groove being formed on a side wall of the lifting guide slide, and the width of the contact control groove being greater than the length of the rolling detection wheel; A driving airbag, wherein the number of the driving airbags is multiple, and the multiple driving airbags are all located in the contact control groove; Wherein, when the driving airbag is in a contracted state, the driving airbag is not in contact with 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 in an expanded state, 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 an open state. and a suction control air pump, which is fixedly mounted on the heat sealing bracket and is signal-connected to the monitoring control module, and is also connected to the driving airbag through a hose.

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