CN114733663B - Coating gram weight monitoring device and method in lithium ion battery coating film production - Google Patents
Coating gram weight monitoring device and method in lithium ion battery coating film production Download PDFInfo
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- CN114733663B CN114733663B CN202210263136.6A CN202210263136A CN114733663B CN 114733663 B CN114733663 B CN 114733663B CN 202210263136 A CN202210263136 A CN 202210263136A CN 114733663 B CN114733663 B CN 114733663B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/084—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to condition of liquid or other fluent material already sprayed on the target, e.g. coating thickness, weight or pattern
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/085—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to flow or pressure of liquid or other fluent material to be discharged
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
- B05B3/1085—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces with means for detecting or controlling the rotational speed
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a coating gram weight monitoring device and a coating gram weight monitoring method in the production of a lithium ion battery coating film, wherein the monitoring device comprises a charging barrel, a feeding pump, a flowmeter, a spraying mechanism, a speed measuring mechanism, a PLC control system and a display screen, wherein slurry in the charging barrel is conveyed to the spraying mechanism through the feeding pump and the flowmeter, the spraying mechanism is used for processing the slurry into fine mist and throwing the fine mist onto a diaphragm, the speed measuring mechanism is used for detecting the rotating speed of a rotating disc of the spraying mechanism, the speed measuring mechanism is used for transmitting detected data to the PLC control system, the PLC control system is used for monitoring the feeding flow value and the rotating speed value of the rotating disc of the spraying mechanism, recording and analyzing the data, and the display screen displays the monitored data. The invention realizes high-precision control and ensures stable supply and transportation of slurry; meanwhile, through online detection of the spraying mechanism, real-time monitoring of the change condition of the gram weight data of the film surface coating is realized, complicated operation of manual detection is reduced, and a large amount of production cost is saved.
Description
Technical Field
The invention relates to the field of lithium battery diaphragm production monitoring, in particular to a device and a method for monitoring coating gram weight in lithium ion battery coating film production.
Background
Lithium ion batteries are increasingly important as new energy materials for informatization, power, energy storage and other applications, and the performance requirements of the lithium ion batteries are also increasingly high. In all cells, the separator plays a critical role. The separator is a porous membrane placed between the anode and cathode and allowing free passage of ions while preventing shorting of the anode and cathode and while allowing rapid transfer of ions as are necessary for an electrochemical cell to achieve a current path. The separator is a good electronic insulator with the ability to conduct ions by impregnation with a fixed ion conductor or electrolyte. The separator should minimize the adverse effect of ion transfer on the energy efficiency of the cell electrochemical system. The conventional method of manufacturing a wound battery is to wind two layers of separator together with positive and negative electrodes, and finally form a separator-negative electrode/separator-positive electrode structure. They are wound as close together as possible to ensure good surface contact, while different cells have strict parameter requirements for the grammage of the separator.
The general process flow of the lithium battery diaphragm spray coating production comprises the following steps: unreeling and discharging, drying and preheating, spraying and coating, drying and drying, rolling and discharging. For the field of film surface performance detection, parameter monitoring such as coating film coating gram weight, transverse gram weight consistency and spraying uniformity is an important link for judging whether the produced diaphragm meets the standards. However, due to the high-speed rotation of the internal turntable during the working of the spraying machine, the problems of inflexible rotation, even jamming, blocking and the like of the turntable caused by mechanical faults of the turntable are very easy to be caused, the problems of abnormal rotating speed of the turntable, large liquid drops on the surface of a spraying film, uneven spraying and the like are directly expressed, and the problems of large fluctuation of gram weight data of a coating layer, inconsistent gram weight data of a transverse coating layer and the like are finally expressed on the performance of the surface of the coating film.
At present, a manual random sampling method is mainly adopted to detect relevant parameters of the diaphragm which is collected in the whole roll, only the first and last positions of the diaphragm in the whole roll are detected, the diaphragm in the whole roll cannot be monitored, and effective monitoring of the whole production quality of the diaphragm is lacked. In addition, the detection methods of different detection personnel are different, so that the situation of measurement accuracy deviation caused by the different detection methods is easy to occur, and the production quality cannot be effectively and comprehensively controlled.
In summary, in the production of lithium battery diaphragms, the membrane surface performance mainly adopts a manual random sampling method to detect the relevant parameters of the diaphragms which are collected by the whole roll, the sampling position is limited to the roll head and the roll tail of the whole roll of diaphragms, the whole roll of diaphragms cannot be analyzed, and the effective monitoring of the whole production quality of the diaphragms is lacking. Meanwhile, the high-speed rotation of the turntable can cause frequent faults, the problems that the turntable is inflexible to rotate, even the turntable is stuck and blocked and the like occur, but the detection efficiency is limited by the detection mode of manual sampling, and a detector cannot find out and process the problems in the first time, so that a large number of coating films with hidden technological performance hazards can be produced.
Disclosure of Invention
The invention aims to provide a coating gram weight monitoring device and method in the production of a lithium ion battery coating film, which can monitor the transverse coating gram weight data of the film surface in the production process of a spray coating film, and simultaneously can ensure the spraying of a coating product to be more uniform, ensure the spraying quality of the product, effectively reduce the generation of unqualified coating products and reduce the production cost.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
in one aspect, the invention provides a coating gram weight monitoring device in lithium ion battery coating film production, which comprises a charging barrel, a charging pump, a flowmeter, a spraying mechanism, a speed measuring mechanism, a PLC control system and a display screen, wherein the charging barrel is used for storing slurry, the slurry in the charging barrel is conveyed to the spraying mechanism through the charging pump and the flowmeter, the spraying mechanism is used for processing the slurry into fine mist and throwing the fine mist onto a diaphragm, the speed measuring mechanism is used for detecting the rotating speed of a rotating disc of the spraying mechanism, the speed measuring mechanism is used for transmitting detected data to the PLC control system, the PLC control system is used for monitoring and recording and analyzing the feeding flow value and the rotating speed value of the rotating disc of the spraying mechanism, and the display screen is used for displaying all monitored data, and the data comprises the feeding flow, the rotating disc rotating speed and the coating gram weight.
As a further preferable mode of the scheme, the feeding pump adjusts the driving rotating speed according to the detection value of the flowmeter, and the adjusting range of the feeding pump is 200-3000 ml/min.
As a further preferable mode of the present invention, the flow detection value of the flowmeter is displayed on the display screen, and the measurement accuracy of the flowmeter is within the range of-0.5% to +0.5%.
As the further preferred of this scheme, contain a plurality of spraying carousel, belt, carousel motor in the spraying mechanism, the carousel motor passes through the belt synchronous drive a plurality of spraying carousel rotatory, the carousel specification is unanimous, the carousel is along the direction overall arrangement setting with membrane face direction of advance vertically to every carousel spraying head equals to the perpendicular distance of membrane face, through PLC control system adjusts carousel motor rotational speed, spraying carousel rotational speed accommodation is: 3000-10000 rpm, the number range of the spraying turntables is: 2 to 20.
In this case, the metal plate is fixed to the surface of the spray turntable.
As a further preferred mode of the scheme, the speed measuring mechanism is provided with a metal proximity switch sensor which is arranged above the turntable, and when the metal proximity switch sensor detects a turntable metal sheet in the rotating process of the spraying turntable, signals are transmitted to the PLC control system; when the metal proximity switch sensor does not detect the turntable metal sheet, no signal is output, and the PLC control system displays the turntable rotating speed value by analyzing the detection data of the metal proximity switch sensor.
As a still further preferable aspect of the present invention, a detection distance range between the front end probe of the metal proximity switch sensor and the turntable metal sheet is: 2-5 mm. When the vertical distance is less than 2mm, the turntable can swing slightly when rotating at a high speed in production, the turntable is easy to collide and damage the metal proximity switch sensor, and when the vertical distance is more than 5mm, the vertical distance exceeds the detection distance range of the metal proximity switch sensor, so that the problem that a rotating speed signal cannot be detected is caused.
On the other hand, the invention also provides a coating gram weight monitoring method in the production of the lithium ion battery coating film, which is characterized by comprising the following steps:
step one: the slurry is sent into a storage mechanism for storage, and is sent out after flow detection;
step two: the slurry sent out is led into a spraying mechanism, the rotating speed of a spraying turntable is set, and the slurry is coated on a diaphragm by adopting a high-speed rotating spraying mode of the turntable;
step three: testing: maintaining the stable slurry supply flow, setting different rotating speed values for the spraying turntable for multiple times, detecting and recording the repeated coating gram weight data of the film surface by adopting a manual detection mode, and recording the coating gram weight detection data corresponding to the rotating speeds of the different turntable into a PLC control system;
step four: and (3) spray production stage: and (3) keeping the slurry supply flow stable, detecting the rotating speed data of the spraying turntable by using a speed measuring mechanism, sending detection signals into a PLC control system, and displaying the coating gram weight data corresponding to the current rotating speed of the turntable according to the corresponding relation of different coating gram weight data corresponding to different rotating speeds of the turntable in the PLC control system, thereby realizing the monitoring of the change of the coating gram weight data in the spraying and coating production process.
As a further preferred aspect of the present invention, in the first step, the flow rate value is detected by a flow meter, and the rotation speed of the feeding device is adjusted according to the flow rate value.
As a further preference of this scheme, in step two, the inside a plurality of spraying carousel that set up of spraying mechanism, the spraying carousel specification is unanimous, and the carousel is along the direction overall arrangement setting that is perpendicular with membrane face direction of advance to every carousel spraying head equals to the perpendicular distance of membrane face, and the rotational speed is adjustable, gets into the thick liquids flow of spraying carousel is the same.
The beneficial effects of the invention are as follows:
the invention realizes high-precision control of the driving rotation speed of the feed pump through the PLC control system, and ensures stable supply and high-quality delivery of slurry. Meanwhile, through online detection of the spraying mechanism, real-time monitoring of the change condition of the gram weight data of the film surface coating can be realized, the specific position of the turntable with abnormal change of the gram weight data of the coating can be accurately judged and displayed, the problem can be really found out at the first time, the intervention of the first time maintenance force is realized, and the resource waste caused by untimely fault detection is avoided, so that a large amount of waste films are produced. In addition, for the diaphragm wiring direction, a plurality of turntables are horizontal position arrangement, through data comparison analysis, can realize the real-time supervision to horizontal membrane surface gram weight data uniformity, improved the effective accuse to membrane surface performance stability, simultaneously, reduced the loaded down with trivial details operation of manual detection, improved the detection precision, avoided because the measuring error that the inspector operation technique brought different, reduced personnel intensity of labour, realized the effective control to the whole production quality of coating film, saved a large amount of manufacturing cost, improved enterprise's comprehensive competitiveness.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a block diagram of a process for spray coating a lithium ion battery separator according to the present invention;
FIG. 2 is a schematic flow chart of a method for monitoring coating gram weight in the production of a spray coating film of a lithium ion battery;
FIG. 3 is a schematic diagram of the coating gram weight monitoring device in the production of the spray coating film of the lithium ion battery;
FIG. 4 is a schematic diagram of the spraying mechanism and the speed measuring mechanism in the production of the spraying coating film of the lithium ion battery;
the reference numerals in the figures are: 1-a charging barrel; 2-a feed pump; 3-a flow meter; 4-a spraying mechanism; 5-a speed measuring mechanism; 6-a display screen; 4-1 spraying a turntable; 4-2 belt; 4-3 a turntable motor; 4-4 turntable metal sheets; 5-1 metal proximity switch sensor.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
As shown in fig. 1, a general process flow for the spray coating production of lithium battery separator includes: unreeling and discharging, drying and preheating, spraying and coating, drying and drying, rolling and discharging.
As shown in fig. 2, the invention provides a coating gram weight monitoring method in the production of a lithium ion battery spray coating film, which comprises the following implementation processes:
step one, delivering the slurry into a storage mechanism for storage, and delivering the slurry after flow detection;
step two, the sent slurry is guided into a spraying mechanism, the rotating speed of a spraying turntable is set, and the slurry is coated on a diaphragm in a high-speed rotating spraying mode of the turntable;
step three, testing: maintaining the stable slurry supply flow, setting different rotating speed values for the spraying turntable for multiple times, detecting and recording the repeated coating gram weight data of the film surface by adopting a manual detection mode, and recording the coating gram weight detection data corresponding to the rotating speeds of the different turntable into a PLC control system;
step four, spraying production stage: maintaining the stable supply flow of the slurry, detecting the rotating speed data of the spraying turntable by using a speed measuring mechanism, sending a detection signal into a PLC system, and displaying the coating gram weight data corresponding to the current rotating speed of the turntable according to the corresponding relation of different coating gram weight data corresponding to different rotating speeds of the turntable in the PLC, thereby realizing the monitoring of the change of the coating gram weight data in the spraying and coating production process;
in the first step of the invention, the flow value of the slurry is read, and the rotating speed of the feeding device can be controlled according to the flow value.
In the second step of the invention, a plurality of turntables are arranged in the spraying mechanism, the specification of the turntables is consistent, and the flow rate of slurry entering the turntables is the same.
In the second step of the invention, the spraying turntable can be driven to rotate, and the rotating speed is adjustable.
In the third step of the invention, the speed measuring mechanism can respectively detect the rotating speeds of a plurality of turntables of the spraying mechanism and record and display the rotating speeds.
In the fourth step of the invention, the consistency of the coating gram weight data of the transverse coating on the film surface can be monitored according to the comparative analysis of the coating gram weight data correspondingly displayed on the rotating speeds of the rotating discs.
Preferably, the slurry components, solid content and other parameters are stable.
As shown in fig. 3, the invention also provides a coating gram weight monitoring device in the production of a lithium ion battery spray coating film, which comprises a feed cylinder 1, a feed pump 2, a flowmeter 3, a spray coating mechanism 4, a speed measuring mechanism 5 and a display screen 6, wherein the feed cylinder 1 is provided with a feed inlet and a discharge outlet, the feed inlet is positioned at the top of the feed cylinder 1, the discharge outlet is positioned at the bottom of the feed cylinder 1, slurry is fed into the feed cylinder 1 through the feed inlet to be stored, is discharged through the discharge outlet at the bottom of the feed cylinder 1, and sequentially passes through the feed pump 2, the flowmeter 3 and the spray coating mechanism 4, the slurry is thrown out onto a diaphragm through the spray coating mechanism 4, and a wet film is dried and rolled to produce a coating film finished product; meanwhile, the speed measuring mechanism is used for detecting the rotating speed of the rotating disc of the spraying mechanism, the speed measuring mechanism transmits detected data to the PLC control system, the PLC control system is used for monitoring and recording and analyzing the feeding flow value and the rotating speed value of the rotating disc of the spraying mechanism, and the display screen is used for displaying all monitored data.
Preferably, the feed pump 2 can adjust the rotation speed according to the detection value of the flowmeter 3, and the feed pump 2 adjusts the range: 200-3000 ml/min to realize stable feeding.
Preferably, the detection value of the flowmeter 3 can be displayed on the display screen 6, the measurement precision of the flowmeter ranges from-0.5% to +0.5%, and the flow fluctuation can be controlled, so that high-precision stable feeding can be realized.
Preferably, the spraying mechanism 4 comprises a plurality of spraying turntables 4-1, a belt 4-2 and a turntable motor 4-3, the turntable motor 4-3 drives the turntables 4-1 to synchronously rotate through the belt 4-2, the rotating speeds of the turntables 4-1 are consistent, the rotating speed of the turntable motor 4-3 can be regulated through the PLC system, and the rotating speed regulation range of the spraying turntables 4-1 is as follows: 3000-15000 rpm, the control of the rotating speed of the turntable 4-1 can be realized; the slurry in the feed cylinder is pressurized and conveyed into the spraying turntable after precise flow control, and then is cut and impacted into fine mist by utilizing the special structure in the turntable by utilizing the high-speed rotation of the turntable; the construction of the spray turntable belongs to the prior art, and the existing turntable is adopted, so that the description is omitted here.
Preferably, the turntable 4-1 is made of non-metal materials, a turntable metal sheet 4-4 is installed and fixed in a part of the surface area of the turntable 4-1, and other areas of the surface of the turntable are made of non-metal materials;
preferably, the speed measuring mechanism 5 is provided with a metal proximity switch sensor 5-1, and when the metal proximity switch sensor 5-1 detects the turntable metal sheet 4-4 in the rotating process of the turntable 4-1, a signal can be transmitted to the PLC control system; when the metal proximity switch sensor 5-1 does not detect the turntable metal sheet 4-4, no signal is output, and the detection distance range between the metal proximity switch sensor 5-1 and the turntable metal sheet 4-4 is as follows: 2-5 mm.
Preferably, the PLC control system can display the rotating speed value of the turntable according to data analysis by detecting the signal output of the metal proximity switch sensor 5-1.
Preferably, the speed measuring mechanism 5 is provided with a plurality of groups of metal proximity switch sensors 5-1, so that the rotation speed detection and record display of a plurality of turntables 4-1 can be realized.
Preferably, the specification parameters of the turntables 4-1 are consistent, the flow rate of the slurry fed into the turntables 4-1 is the same, the high-speed rotation spraying effect of the turntables 4-1 is the same, and the quality of the thrown slurry is the same under the conditions of unit time and unit area, so that the film surface spraying is uniform and stable.
Setting different rotating speed values for the spraying turntable 4-1 for multiple times under the premise of keeping the stable slurry supply flow in a testing stage, detecting and recording repeated coating gram weight data of the film surface by adopting a manual detection mode, and recording the coating gram weight detection data corresponding to different turntable rotating speeds into a PLC control system;
in the normal production stage of spraying coating, on the premise of keeping the stable slurry supply flow, the speed measuring mechanism 5 is used for detecting the rotating speed data of the spraying turntable 4-1, a detection signal is sent to the PLC control system, and the coating gram weight data corresponding to the current rotating speed of the turntable is displayed according to the corresponding relation of different coating gram weight data corresponding to different rotating speeds of the turntable in the PLC, so that the monitoring of the change of the coating gram weight data in the spraying coating production process is realized. Meanwhile, the change condition of the coating gram weight data displayed by the rotary tables 4-1 distributed at the transverse positions is observed, and the comparison analysis is performed, so that the monitoring of the consistency of the transverse film surface coating gram weight is finally realized.
The method and the device for monitoring the gram weight of the coating layer in the production of the spray coating film of the lithium ion battery are further described by the following specific examples.
xx lithium film company spray coater device operating conditions: the production speed of the coating machine is 50m/min, the rotating speed of the spraying turntable is 6000rpm, the length of the film roll is 2000 m/roll, the calculation shows that the production time for completing 1-roll spraying coating is about 2000/50=40 min, the time point for setting the beginning is 0min, the time point for completing one-roll diaphragm spraying coating production is 40min, film surface performance monitoring and data recording are carried out every 10min according to the time interval, a wet synchronous double-pull polyethylene diaphragm with the thickness of 5 mu m is selected as a substrate diaphragm in the following examples and comparative examples, and the solid content of the selected spraying coating slurry is 8% -15%.
Embodiment one: the feeding pump of the feeding mechanism can perform feedback control according to the value of the flowmeter, is driven with high precision, and sets the feeding flow of spraying slurry to 1200ml/min; the speed measuring mechanism can detect the rotating speed of the turntable and output and display the rotating speed.
Embodiment two: the feeding pump of the feeding mechanism can perform feedback control according to the value of the flowmeter, is driven with high precision, and sets the feeding flow of spraying slurry to 1500ml/min; the speed measuring mechanism can detect the rotating speed of the turntable and output and display the rotating speed.
In order to better illustrate the technical effects achieved by the present invention, the present invention provides a comparative illustration of the significant advances made by the present invention through several comparative examples of implementation.
Comparative example one: the feeding pump of the feeding mechanism can perform feedback control according to the value of the flowmeter, is driven with high precision, and sets the feeding flow of spraying slurry to 1200ml/min; the speed measuring mechanism can detect the rotating speed of the rotating disc and output and display the rotating speed, when the speed measuring mechanism detects that the rotating speed of the rotating disc is abnormal in 10 minutes after the spraying coating starts, the equipment is immediately stopped in an alarm mode, maintenance personnel expand and repair the equipment, and spraying production of the coating machine is continued after repair.
Comparative example two: the feeding pump of the feeding mechanism can perform feedback control according to the value of the flowmeter, is driven with high precision, and sets the feeding flow of spraying slurry to 1200ml/min; the equipment is not provided with a turntable speed measuring mechanism, after spray coating production is carried out for 10min, mechanical clamping stagnation occurs on the turntable, the rotating speed is abnormal, an operator cannot find the abnormal performance of the film surface in time until the tail of the final film roll is detected.
The data of the rotor rotating speed, the coating gram weight and the like detected by the embodiment of the invention and the comparative example are compared by combining manual detection data of the film surface performance by a detection personnel and display screen data of a monitoring mechanism, and the data are shown in the following table.
Table 1:
as can be seen from table 1, in the case where the feed flow rate is stable and the rotational speed monitoring can be performed on the turntable, the rotational speed of the turntable is stable (rotational speed fluctuation < 0.1%), coating films of different coating grammage can be spray-coated by setting different flow rate values, and in the spray-coating production, the coating grammage data fluctuation can be monitored and kept small (coating grammage fluctuation data < 6%). In the comparative example, the rotating disk has abnormal rotating speed due to the fault, the fluctuation of coating data is large, and under the condition of configuring a rotating speed monitoring mechanism, the rotating disk can be immediately stopped in an alarm manner and the fault treatment can be carried out, so that the continuous production of a problem film is reduced; if the rotating speed monitoring mechanism is not configured, the detection efficiency is greatly reduced, problems of the rotating disc cannot be found and processed in time, a large number of problem films with film surface gram weight data not conforming to the process requirements are generated, the film surface performance parameters are not in a controllable range, and even a malignant event that the whole roll of coating film is scrapped occurs.
In summary, on the premise of stable feed flow, the change condition of the coating gram weight data can be indirectly tracked and judged by utilizing the speed measuring mechanism and tracking and observing the change condition of the rotating speed of the rotating disc, so as to realize the aim of monitoring the change of the coating gram weight data. In addition, because the spraying mechanism is provided with a plurality of turntables, the spraying mechanism is transversely arranged and distributed with the film surface tape conveying direction, and the problem of the consistency of the transverse gram weights of the film surface can be effectively monitored by analyzing and comparing the rotating speed data conditions of the turntables.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by equivalent substitution are within the scope of the present invention.
The invention is not related in part to the same as or can be practiced with the prior art.
Claims (9)
1. The coating gram weight monitoring method in the production of the lithium ion battery coating film is characterized by comprising the following steps of:
step one: the slurry is sent into a storage mechanism for storage, and is sent out after flow detection;
step two: the slurry sent out is led into a spraying mechanism, the rotating speed of a spraying turntable is set, and the slurry is coated on a diaphragm by adopting a high-speed rotating spraying mode of the turntable;
step three: testing: maintaining the stable slurry supply flow, setting different rotating speed values for the spraying turntable for multiple times, detecting and recording the repeated coating gram weight data of the film surface by adopting a manual detection mode, and recording the coating gram weight detection data corresponding to the rotating speeds of the different turntable into a PLC control system;
step four: and (3) spray production stage: maintaining the stable slurry supply flow, detecting the rotating speed data of the spraying turntable by using a speed measuring mechanism, sending detection signals into a PLC control system, and displaying the coating gram weight data corresponding to the current rotating speed of the turntable according to the corresponding relation of different coating gram weight data corresponding to different rotating speeds of the turntable in the PLC control system, thereby realizing the monitoring of the change of the coating gram weight data in the spraying and coating production process;
the coating gram weight monitoring method is realized through a coating gram weight monitoring device, the coating gram weight monitoring device comprises a charging barrel, a feeding pump, a flowmeter, a spraying mechanism, a speed measuring mechanism, a PLC control system and a display screen, wherein the charging barrel is used for storing slurry, the slurry in the charging barrel is conveyed to the spraying mechanism through the feeding pump and the flowmeter, the spraying mechanism is used for processing the slurry into fine mist and throwing the fine mist onto a diaphragm, the speed measuring mechanism is used for detecting the rotating speed of a turntable of the spraying mechanism, the speed measuring mechanism transmits detected data to the PLC control system, the PLC control system is used for monitoring and recording and analyzing the feeding flow value and the rotating speed value of the turntable of the spraying mechanism, and the display screen is used for displaying all monitored data, and the data comprises the feeding flow, the rotating speed of the turntable and the gram weight of the coating.
2. The method for monitoring coating gram weight in production of lithium ion battery coating film according to claim 1, wherein in the first step, the flow value is detected by a flow meter, and the rotating speed of the feeding device is adjusted according to the flow value.
3. The method for monitoring the coating gram weight in the production of the lithium ion battery coating film according to claim 1, wherein in the second step, a plurality of spraying turntables are arranged in the spraying mechanism, the specification of the spraying turntables is consistent, the turntables are arranged in a direction perpendicular to the film surface travelling direction, the perpendicular distance from each turntable spraying head to the film surface is equal, the rotating speed is adjustable, and the flow rate of slurry entering the spraying turntables is the same.
4. The method for monitoring the gram weight of the coating in the production of the lithium ion battery coating film according to claim 1, wherein the feeding pump adjusts the driving rotation speed according to the detection value of the flowmeter, and the adjusting range of the feeding pump is 200-3000 ml/min.
5. The method for monitoring the gram weight of the coating in the production of the lithium ion battery coating film according to claim 1, wherein the flow detection value of the flowmeter is displayed on the display screen, and the measuring precision of the flowmeter is within the range of-0.5% to minus 0.5%.
6. The method for monitoring the gram weight of the coating in the production of the coating film of the lithium ion battery according to claim 1, wherein the spraying mechanism comprises a plurality of spraying turntables, a belt and a turntable motor, the turntable motor synchronously drives the spraying turntables to rotate through the belt, the turntables are consistent in specification, the turntables are arranged in a layout manner along the direction perpendicular to the film surface travelling direction, the vertical distance from each turntable spraying head to the film surface is equal, the rotating speed of the turntable motor is regulated through the PLC control system, and the rotating speed regulation range of the spraying turntables is as follows: 3000-10000 rpm, the quantity scope of spraying carousel is: 2-20.
7. The method for monitoring the gram weight of the coating in the production of the coating film of the lithium ion battery according to claim 6, wherein the spraying turntable is made of nonmetal materials, and a metal sheet is fixedly arranged in a partial area of the surface of the spraying turntable.
8. The method for monitoring the gram weight of the coating in the production of the coating film of the lithium ion battery according to claim 7, wherein the speed measuring mechanism is provided with a plurality of metal proximity switch sensors, the number of the metal proximity switch sensors is the same as that of the spraying turntables, the metal proximity switch sensors are arranged above each spraying turntable, and in the rotating process of the spraying turntables, when the metal proximity switch sensors detect the metal sheets of the turntables, signals are transmitted to the PLC control system; when the metal proximity switch sensor does not detect the turntable metal sheet, no signal is output, and the PLC control system displays the rotating speed value of the spraying turntable by analyzing the detection data of the metal proximity switch sensor.
9. The method for monitoring the gram weight of the coating in the production of the coating film of the lithium ion battery according to claim 8, wherein the vertical distance range between the front end probe of the metal proximity switch sensor and the turntable metal sheet is as follows: 2-5 mm.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07320999A (en) * | 1993-03-25 | 1995-12-08 | Tokyo Electron Ltd | Method and apparatus for coating |
| US5939130A (en) * | 1996-05-28 | 1999-08-17 | Tokyo Electron Limited | Coating film forming method and coating film forming apparatus |
| JP2002361167A (en) * | 2001-06-04 | 2002-12-17 | Tokyo Electron Ltd | Film forming method |
| CN105710661A (en) * | 2016-04-22 | 2016-06-29 | 湖北工业大学 | Oil film thickness adjusting device and method for static pressure workbench |
| CN106370885A (en) * | 2016-09-29 | 2017-02-01 | 中北大学 | Apparatus and method for measuring flow field of spinning disc reactor based on PIV (particle image velocity) technology |
| CN111180640A (en) * | 2020-03-04 | 2020-05-19 | 中材锂膜有限公司 | Novel lithium battery diaphragm spraying coating production equipment |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7517469B2 (en) * | 2006-04-28 | 2009-04-14 | Sokudo Co., Ltd. | Method and system to measure flow velocity and volume |
| DE102007033892A1 (en) * | 2007-07-20 | 2009-01-22 | Dürr Systems GmbH | Method for process diagnostics and rotary atomizer arrangement |
| CA2691712A1 (en) * | 2009-02-16 | 2010-08-16 | Honda Motor Co., Ltd. | Electrostatic coating method and electrostatic coating apparatus |
| KR101443680B1 (en) * | 2012-02-09 | 2014-09-26 | 전자부품연구원 | Redox flow secondary cell |
| CN204018065U (en) * | 2014-07-17 | 2014-12-17 | 江苏省农业科学院 | A kind of fixed controlled droplet low pressure spray device and system |
| CN106088548A (en) * | 2016-08-08 | 2016-11-09 | 上海同济环境工程科技有限公司 | A kind of concrete surface coating intelligent electric brush |
| CN110085790A (en) * | 2019-05-06 | 2019-08-02 | 江苏安瑞达新材料有限公司 | The preparation process of the lithium battery dotted coating diaphragm of Low ESR high-adhesion |
| CN111054563A (en) * | 2019-11-27 | 2020-04-24 | 中材锂膜有限公司 | Novel lithium battery diaphragm spraying device and using method thereof |
| CN213161375U (en) * | 2020-08-26 | 2021-05-11 | 郑州佳丽数码科技材料有限公司 | Spray coating device |
| CN215695140U (en) * | 2021-09-02 | 2022-02-01 | 中铁上海工程局集团市政环保工程有限公司 | Controllable mortar spraying equipment of stroke and spraying volume |
-
2022
- 2022-03-17 CN CN202210263136.6A patent/CN114733663B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07320999A (en) * | 1993-03-25 | 1995-12-08 | Tokyo Electron Ltd | Method and apparatus for coating |
| US5939130A (en) * | 1996-05-28 | 1999-08-17 | Tokyo Electron Limited | Coating film forming method and coating film forming apparatus |
| JP2002361167A (en) * | 2001-06-04 | 2002-12-17 | Tokyo Electron Ltd | Film forming method |
| CN105710661A (en) * | 2016-04-22 | 2016-06-29 | 湖北工业大学 | Oil film thickness adjusting device and method for static pressure workbench |
| CN106370885A (en) * | 2016-09-29 | 2017-02-01 | 中北大学 | Apparatus and method for measuring flow field of spinning disc reactor based on PIV (particle image velocity) technology |
| CN111180640A (en) * | 2020-03-04 | 2020-05-19 | 中材锂膜有限公司 | Novel lithium battery diaphragm spraying coating production equipment |
Non-Patent Citations (2)
| Title |
|---|
| 童季刚 ; 罗良传 ; 廖菲 ; .一种转台式多工位表面自动喷涂系统设计.自动化与信息工程.2016,(第02期),第21-24页. * |
| 范海波 ; 韩志昌 ; 赵立波 ; 赵璐露 ; 高超 ; 王奥 ; 卢鹉 ; .双组分硅橡胶防热涂料自动喷涂工艺研究.涂料工业.2020,(01),第63-68+74页. * |
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