CN115646682B - Carbon-coated foil coating equipment and method for lithium ion battery - Google Patents
Carbon-coated foil coating equipment and method for lithium ion battery Download PDFInfo
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- CN115646682B CN115646682B CN202211587598.XA CN202211587598A CN115646682B CN 115646682 B CN115646682 B CN 115646682B CN 202211587598 A CN202211587598 A CN 202211587598A CN 115646682 B CN115646682 B CN 115646682B
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Abstract
The invention discloses carbon-coated foil coating equipment for a lithium ion battery, which comprises a base plate; the guide rail is fixedly arranged on the bottom plate; the sliding table is provided with a tooling table for loading a current collector; the spraying unit is used for spraying the two sides of the current collector; the drying unit is used for drying the coated current collector; the thickness measuring unit is used for measuring the thickness of the conductive slurry coating on the current collector; the driving assembly is used for driving the sliding table to horizontally move along the guide rail; and the controller is electrically connected with the driving assembly, the spraying assembly, the thickness measuring unit and the drying unit. The invention also discloses a carbon-coated foil coating method for the lithium ion battery, which can flexibly adjust the spraying amount of the spray head in unit time, improve the coating efficiency, improve the texture of the product, ensure the coating efficiency and give consideration to the coating quality.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to carbon-coated foil coating equipment and a carbon-coated foil coating method for a lithium ion battery.
Background
Lithium ion batteries have been widely used in the field of new energy vehicles due to their advantages of high energy density, good cycle performance, light weight, etc. Generally, an aluminum foil and a copper foil are respectively adopted as a current collector of a positive plate and a negative plate of a lithium ion battery, and conductive slurry containing active positive and negative materials, a conductive agent, a binder and the like is coated on the current collector to prepare a carbon-coated foil, and the carbon-coated foil can reduce the impedance of the lithium ion battery, enhance the bonding strength of a coating, prolong the cycle life of the battery and improve the oxidation resistance of the current collector.
The thickness of the coating on the carbon-coated foil has a crucial influence on the performance of the lithium ion battery, different types of lithium ion batteries have different requirements on the thickness of the carbon-coated foil, in order to ensure the precision of the thickness of the coating, each group of current collectors needs to be coated for multiple times, the conventional carbon-coated foil coating equipment still has certain defects on the control of each coating amount, and the single coating amount is basically constant, so that the coating efficiency is poor in the initial coating stage, and when the thickness of the coating is close to a set value, the actual thickness of the coating exceeds the set value, so that the product is scrapped.
Disclosure of Invention
The invention aims to provide carbon-coated foil coating equipment and a carbon-coated foil coating method for a lithium ion battery, so as to solve the problems of the background technology.
The purpose of the invention can be realized by the following technical scheme:
a carbon-coated foil coating apparatus for a lithium ion battery, comprising:
a base plate;
the guide rail is fixedly arranged on the bottom plate;
the sliding table is slidably mounted on the guide rail, and a tooling table for loading a current collector is arranged on the sliding table;
the spraying unit is arranged above the guide rail and is used for spraying the two sides of the current collector;
the drying unit is arranged above the guide rail and is used for drying the coated current collector;
the thickness measuring unit is arranged between the spraying unit and the drying unit and is used for measuring the thickness of the conductive slurry coating on the current collector;
the driving assembly is used for driving the sliding table to horizontally move along the guide rail;
the controller is electrically connected with the driving assembly, the spraying assembly, the thickness measuring unit and the drying unit; the thickness measuring unit is used for obtaining the thickness of an input coating required by the outside and the actual coating thickness measured by the thickness measuring unit and judging whether the actual coating thickness reaches the thickness of the input coating; when the actual coating thickness is smaller than the input coating thickness, the controller controls the driving assembly to drive the sliding table to return to the initial position and judges whether the difference value between the actual coating thickness and the input coating thickness is larger than a set value or not, if so, the spraying amount of the spraying unit in unit time is controlled to be increased and spraying is carried out again; if not, controlling the spraying amount of the spraying unit in unit time to be reduced and spraying again; and controlling the driving assembly to drive the tool table to enter the drying unit by the controller until the actual coating thickness reaches the input coating thickness, and drying and curing the coating on the surface of the current collector.
As a further scheme of the invention: the spraying unit includes:
the material storage box is fixedly arranged on the bottom plate through a first bracket;
the output pumps are symmetrically arranged on two sides of the bottom of the material storage box; the output end of the output pump is connected with a discharge pipe;
the connecting pipe is connected to one end, far away from the output pump, of the discharge pipe; and
the spraying plate is installed at one end, far away from the discharge pipe, of the connecting pipe, and a plurality of spray heads are distributed on the spraying plate at equal intervals.
As a further scheme of the invention: the spray heads on the spray plates on the two sides are just opposite to the surface of the current collector, the spray heads on the spray plates are integrally vertically arranged, and the distance between the head spray head and the tail spray head is greater than the width of the current collector.
As a further scheme of the invention: the junction of discharging pipe and connecting pipe still is provided with the governing valve, and the governing valve is used for adjusting the flow of conductive paste.
As a further scheme of the invention: the drive assembly includes:
the motor is fixedly arranged on one side of the guide rail through the mounting plate;
a gear mounted on the motor output shaft; and
and the rack is arranged on the sliding table and is in meshing transmission with the gear.
As a further scheme of the invention: the stoving unit includes the stoving case, the stoving case is fixed in on the bottom plate through the second support, and stoving incasement portion is provided with heating member, and the passageway has been seted up to stoving bottom of the case portion.
As a further scheme of the invention: the heating element is an electric heating wire or a hot air pipe.
As a further scheme of the invention: the thickness measuring unit comprises a third support and a thickness gauge, the third support is divided into two groups and symmetrically distributed on two sides of the guide rail, the third support is fixedly installed on the bottom plate, and the thickness gauge is installed on the third supports on two sides.
The invention also discloses a carbon-coated foil coating method for the lithium ion battery, which is applied to the carbon-coated foil coating equipment for the lithium ion battery and comprises the following steps:
the method comprises the following steps that firstly, a controller controls a driving assembly to drive a sliding table to feed forward, a spraying assembly conducts conductive slurry spraying on two sides of a current collector, and a thickness measuring unit measures the thickness of a coating;
step two, the controller acquires the thickness of an input coating required by the outside, acquires the actual coating thickness on the current collector measured by the thickness measuring unit, and judges whether the current actual coating thickness reaches the thickness of the input coating; if yes, executing a fifth step; if not, executing the third step;
thirdly, the controller controls the driving assembly to drive the sliding table to reversely return to the initial position;
step four, the controller judges whether the difference value between the actual coating thickness and the input coating thickness is larger than a set value again; if so, the controller controls the spraying amount of the spraying unit to increase in unit time and executes the step one again; if not, the controller controls the spraying amount of the spraying unit to be reduced in unit time and executes the step one again;
and step five, the controller controls the driving assembly to drive the tool table to enter the drying unit, and the coating on the surface of the current collector is dried and cured.
The invention has the beneficial effects that:
the spray unit and the thickness measuring unit are arranged, so that the difference value between the actual coating thickness and the input coating thickness of the current collector can be compared in real time, and the spray amount of the spray head in unit time can be flexibly adjusted according to the amplitude of the difference value. When the difference is larger, the spraying frequency is reduced and the coating efficiency is improved by increasing the spraying amount of the spray head in unit time. When the difference is smaller, the spraying amount of the spray head in unit time is reduced, fine spraying is realized, the texture of the product is improved, and the product scrapping caused by the fact that the thickness of the coating exceeds a set value is avoided.
This a scribble charcoal foil coating equipment for lithium ion battery can be according to the demand of reality, through actual coating thickness and the input thickness on the comparison mass flow body, realizes repeated spraying operation to can be according to the difference size of actual coating thickness and input thickness, the unit interval spraying volume of nimble regulation shower nozzle guarantees coating efficiency and gives consideration to the coating quality simultaneously.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a first perspective view of the present invention;
FIG. 2 is a second perspective view of the present invention;
FIG. 3 is a perspective view of the spray unit of the present invention;
FIG. 4 is a perspective view of the drive assembly of the present invention;
FIG. 5 is a schematic flow chart of the present invention.
In the figure: 1. a base plate; 2. a guide rail; 3. a sliding table; 4. a tooling table; 5. an opening; 6. a current collector; 7. a material storage box; 8. a first bracket; 9. an output pump; 10. a discharge pipe; 11. adjusting a valve; 12. a connecting pipe; 13. spraying a plate; 14. a spray head; 15. a drying box; 16. a second bracket; 17. a channel; 18. a third support; 19. a thickness gauge; 20. a controller; 21. mounting a plate; 22. a motor; 23. a gear; 24. a rack.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1 and 2, the embodiment discloses a carbon-coated foil coating apparatus for a lithium ion battery, which includes a base plate 1, a guide rail 2, a sliding table 3, a tooling table 4, a driving assembly, a spraying unit, a drying unit, a thickness measuring unit, a controller 20, a power supply, and the like.
In this embodiment, the upper end surface of the bottom plate 1 is flat, the guide rail 2 is installed on the bottom plate 1, and the guide rail 2 and the bottom plate 1 can be fixed by welding or by bolts, so that the stability and firmness of the guide rail 2 can be ensured. The track of guide rail 2 is the level, slides in the guide rail 2 and sets up slip table 3, and 2 horizontal motions of guide rail can be followed to slip table 3, and in order to guarantee the stationarity of 3 motions of slip table, set up the ladder groove on the guide rail 2, correspond on the slip table 3 and set up the fixture block, through mutually supporting of fixture block and ladder groove, lead the stroke of slip table 3, avoid slip table 3 to deviate from the accident in the guide rail 2.
In this embodiment, a tooling table 4 is disposed on the sliding table 3, and the tooling table 4 is used for loading a current collector 6. The specific structure of the tooling table 4 is not limited, and may be a flat plate type or a frame type, as long as the current collector 6 can be loaded and both sides of the current collector 6 are exposed. Tooling table 4 top is equipped with opening 5, and tooling table 4 is inside to be provided with the holding tank that holds mass flow body 6, and the holding tank just can load one piece of mass flow body 6, and the holding tank both sides link up. With the mass flow body 6 from opening 5 vertical put into the holding tank in the frock platform 4, the two sides of the mass flow body 6 all expose externally to be convenient for carry out conductive paste's spraying operation to the two-sided of the mass flow body 6.
In the present embodiment, referring to fig. 1 and fig. 3, the spraying unit is disposed above the guide rail 2 and is used for spraying the conductive paste on both sides of the current collector 6. The spraying unit comprises a storage tank 7, an output pump 9, a discharge pipe 10 and a spraying plate 13. Storage case 7 is through 8 fixed mounting of first support on bottom plate 1, and storage case 7 is located guide rail 2 tops, and the height that highly is higher than the top height of frock platform 4 of storage case 7 bottommost to make frock platform 4 pass from storage case 7 below smoothly, the storage has conductive paste in the storage case 7. Output pump 9 is installed to 7 bottom bilateral symmetry of storage case, and output pump 9 output is connected with discharging pipe 10, and output pump 9 can take out the conductive paste in the storage case 7 and pump into in discharging pipe 10. The specific type of the output pump 9 is not limited, and may be a plunger pump, a peristaltic pump, a gear pump, or the like, as long as the function of pumping liquid materials is achieved. The end of the discharge pipe 10 far away from the output pump 9 is communicated with a connecting pipe 12, one end of the connecting pipe 12 far away from the discharge pipe 10 is provided with a spraying plate 13, and a plurality of spray heads 14 are equidistantly distributed on the spraying plate 13. The conductive slurry in the storage box 7 is pumped out through the output pump 9, and the conductive slurry sequentially passes through the discharge pipe 10, the connecting pipe 12 and the spraying plate 13 and is finally sprayed out from each spray head 14, so that the surface of the current collector 6 is sprayed.
It should be noted that the nozzles 14 on the spraying plates 13 on both sides are all right opposite to the surface of the current collector 6, and the nozzles 14 on the spraying plates 13 are integrally vertically arranged, and the distance between the head and tail nozzles 14 is greater than the width of the current collector 6, so that the conductive paste sprayed by the nozzles 14 can cover the whole surface of the current collector 6, and the existence of spraying dead angles is avoided.
In addition, an adjusting valve 11 is further arranged at the connection position of the discharging pipe 10 and the connecting pipe 12, the adjusting valve 11 is used for adjusting the flow of the conductive slurry, so that the amount of the conductive slurry sprayed out by the spray head 14 in unit time is controlled, wherein the spraying amount of the spray head 14 in unit time is mainly determined according to experience or the coating thickness required by the current collector 6, when the coating thickness of the current collector 6 is larger, the spraying amount of the spray head 14 in unit time can be properly increased, so that the number of times of back-and-forth spraying can be reduced, and the coating efficiency can be improved; when the requirement on the coating fineness of the current collector 6 is relatively high, the spraying amount of the spray head 14 in unit time can be properly reduced, so that the integral uniformity and texture of the coating are improved through multiple times of fine spraying.
Referring to fig. 4, the driving assembly in this embodiment is used to drive the sliding table 3 to move horizontally along the guide rail 2, so as to drive the current collector 6 on the tooling table 4 to horizontally pass through between the spraying plates 13 on two sides, so that the conductive paste sprayed from the nozzle 14 can be uniformly coated on the surfaces on two sides of the current collector 6. Specifically, the drive assembly includes a mounting plate 21, a motor 22, a gear 23, and a rack 24. The motor 22 is fixedly arranged on one side of the guide rail 2 through the mounting plate 21, a gear 23 is arranged on an output shaft of the motor 22, a rack 24 is arranged on the sliding table 3, and the gear 23 is in meshing transmission with the rack 24. The motor 22 drives the gear 23 to rotate, and the gear 23 is meshed with the rack 24, so that the rack 24 is driven to move, the sliding table 3 is driven to horizontally move along the guide rail 2, and the horizontal feeding of the fluid collection body 6 on the tool table 4 is realized. By switching the forward and reverse rotation of the motor 22, the movement direction of the slide table 3 can be realized, so that the current collector 6 can be fed forward and backward.
In this embodiment, referring to fig. 1 and fig. 2, the drying unit is also disposed above the guide rail 2 and located at one side of the spraying unit, and is used for performing a drying process on the coated current collector 6, so as to quickly cure the conductive paste on the surface of the current collector 6. The specific form of the drying unit is not limited, and the drying unit may be heating wire drying or hot air drying, as long as the ambient temperature can be raised to solidify the conductive paste on the surface of the current collector 6. Specifically, the drying unit comprises a drying box 15 and a second support 16, the drying box 15 is fixed on the bottom plate 1 through the second support 16, and a heating element is arranged inside the drying box 15, wherein the heating element can be an electric heating wire or a hot air pipe. Drying box 15 bottom is seted up along 2 unanimous passages 17 that run through of moving towards of guide rail, and slip table 3 drives the motion of frock platform 4, and in frock platform 4 got into drying box 15 from passage 17, heating member work can carry out drying process to the two-sided of the mass flow body 6.
In this embodiment, referring to fig. 1 and fig. 2, the thickness measuring unit is disposed between the spraying unit and the drying unit, and is used for detecting the thickness of the conductive paste coating on the current collector 6. Specifically, the thickness measuring unit includes a third support 18 and a thickness gauge 19. The third support 18 has two groups and is symmetrically distributed on two sides of the guide rail 2, and the third support 18 is fixedly arranged on the bottom plate 1. The thickness measuring instrument 19 is installed on the third supports 18 on the two sides, the specific type of the thickness measuring instrument 19 is not limited, and the thickness measuring instrument can be a laser thickness measuring instrument or an ultrasonic thickness measuring instrument. Specifically, in the present embodiment, the thickness gauge 19 is a type up to SW6310A with an accuracy of 0.001mm. Before measurement, zero calibration needs to be performed on the thickness gauge 19, when the current collector 6 without the coating passes through the thickness gauge 19, the thickness gauge 19 measures and records an initial value, then, each time the current collector 6 is coated, the current collector 6 passes through the thickness gauge 19 to be measured, and the sum of the thicknesses of the coating layers on the two sides of the current collector 6 is obtained by subtracting the initial value from the measured value.
It should be noted that the material spraying of the nozzles 14 on both sides is consistent, so that the thickness of the coating on both sides of the current collector 6 can be always consistent, and half of the difference between the measured value and the initial value is the thickness of the coating on one side.
Firstly, the driving assembly drives the tool table 4 to pass through the spraying unit at a constant speed, the spray head 14 uniformly sprays the two sides of the current collector 6, then the driving assembly drives the current collector 6 to pass through the thickness gauge 19, and the thickness gauge 19 measures the thickness of the coating on the current collector 6 in real time, which is a spraying period.
In the present embodiment, please refer to fig. 1 and 2, the controller 20 is installed on the bottom plate 1, and the controller 20 is electrically connected to the driving assembly, the spraying unit, the drying unit and the thickness measuring unit. In each spraying cycle, the controller 20 is configured to obtain an externally required thickness of the current collector 6 coating, then obtain the current thickness of the current collector 6 coating measured by the thickness gauge 19, and finally compare the current coating thickness with the input thickness. When the current coating thickness is smaller than the input thickness, the controller 20 controls the motor 22 in the driving assembly to rotate reversely, so that the sliding table 3 returns to the initial position along the guide rail 2, then the controller 20 controls the motor 22 to rotate forwardly, so that the tool table 4 on the sliding table 3 passes through the spraying unit again at a constant speed, the controller 20 controls the output pump 9 to be started, the spray head 14 is used for spraying the surface of the current collector 6 again, the spraying is finished, the controller 20 obtains the new coating thickness measured by the thickness gauge 19 again, and the coating thickness is compared with the input thickness again; if the thickness of the coating is still smaller than the input thickness, the steps are repeated to continue spraying until the actual thickness of the coating is consistent with the input thickness, the controller 20 controls the driving assembly to send the tool table 4 into the drying box 15, and the controller 20 controls the heating element to be opened to carry out curing treatment on the surface coating of the current collector 6.
In addition, the controller 20 is also used for controlling the regulating valve 11 to regulate the opening degree, so as to control the spraying amount of the spray head 14 in unit time, and when the difference between the actual thickness of the coating and the input thickness is larger, the spraying amount of the spray head 14 in unit time can be properly increased, so that the number of times of back-and-forth spraying can be reduced, and the coating efficiency can be improved; for the judgment of the larger difference, a specific range may be set according to actual experience, for example, when the input thickness is 10 μm, the range of the difference may be set between 2 μm and 3 μm, for example, when the difference between the actual thickness of the coating and the input thickness is greater than 2 μm (or may be 3 μm), the spraying amount of the nozzle 14 in unit time may be increased, the specific increase range may be determined according to the actual experience, the increase amplitude may be proportional to the difference, the specific proportionality coefficient may also be determined according to the actual experience, and when the difference gradually decreases, the increase amplitude also gradually decreases until the difference reaches the set range of the difference, the increase amplitude is just 0. When the difference between the actual thickness of the coating and the input thickness is smaller than the set difference range, for example, when the difference between the actual thickness of the coating and the input thickness is smaller than 2 μm (or 3 μm), the spraying amount of the spray head 14 per unit time can be properly reduced, the specific reduction range can be determined according to practical experience, for example, the reduction range is 50%, if the actual coating thickness is still smaller than the input coating thickness, the reduction range is continuously reduced by 50% on the basis of the previous step, and so on, so that the integral uniformity and texture of the coating are improved through multiple times of fine spraying, and product scrapping caused by the fact that the actual coating thickness exceeds the input thickness due to the fact that the spraying amount is too large is avoided.
It should be noted that, when the spraying unit sprays for the first time, the controller 20 controls the opening of the adjusting valve 11 to ensure that the actual coating thickness after the first spraying is finished does not exceed the input coating thickness, so as to avoid product rejection caused by the fact that the actual coating thickness exceeds the input coating thickness due to the fact that the spraying amount for the first time is too large.
To sum up, the carbon-coated foil coating apparatus for lithium ion batteries in the present embodiment has the following advantages:
the arrangement of the spraying unit and the thickness measuring unit can compare the difference value between the actual coating thickness and the input coating thickness of the current collector 6 in real time, so that the spraying amount of the spray head 14 in unit time can be flexibly adjusted according to the amplitude of the difference value. When the difference is large, the number of times of spraying is reduced by increasing the spraying amount of the spray head 14 per unit time, and the coating efficiency is improved. When the difference is small, the spraying amount of the spray head 14 in unit time is reduced, fine spraying is realized, the texture of the product is improved, and the product scrapping caused by the fact that the thickness of the coating exceeds a set value is avoided.
This a carbon-coated foil coating equipment for lithium ion battery can be according to the demand of reality, through actual coating thickness and the input thickness on the comparison mass flow body 6, realizes repeated spraying operation to can be according to the difference size of actual coating thickness and input thickness, adjust the unit interval spraying volume of shower nozzle 14 in a flexible way, compromise coating quality when guaranteeing coating efficiency.
Example 2
Referring to fig. 5, the present embodiment provides a carbon-coated foil coating method for a lithium ion battery, which is applied to the carbon-coated foil coating apparatus for a lithium ion battery in the above embodiment 1. The method specifically comprises the following steps:
step one, the controller 20 controls the driving assembly to drive the sliding table 3 to feed forward, the spraying unit sprays conductive slurry on the two sides of the current collector 6, and the thickness measuring unit measures the thickness of a coating;
step two, the controller 20 acquires the thickness of an input coating required by the outside, acquires the actual thickness of the coating on the current collector 6 measured by the thickness gauge 19, and judges whether the current actual coating thickness reaches the thickness of the input coating; if yes, executing a fifth step; if not, executing the step three;
step three, the controller 20 controls the driving assembly to drive the sliding table 3 to reversely return to the initial position;
step four, the controller 20 judges whether the difference value between the actual coating thickness and the input coating thickness is larger than a set value again; if yes, the controller 20 controls the opening of the regulating valve 11 to increase, the spraying amount of the spray head 14 in unit time is increased, and the first step is executed again; if not, the controller 20 controls the opening of the regulating valve 11 to be reduced, reduces the spraying amount of the spray head 14 in unit time and executes the step one again;
and step five, the controller 20 controls the driving assembly to drive the tool table 4 to enter the drying unit, and the coating on the surface of the current collector 6 is dried and cured.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A carbon-coated foil coating apparatus for a lithium ion battery, comprising:
a base plate (1);
a guide rail (2) fixedly mounted on the base plate (1);
the sliding table (3) is slidably mounted on the guide rail (2), and a tooling table (4) for loading a current collector (6) is arranged on the sliding table (3);
the spraying unit is used for spraying conductive slurry on the double surfaces of the current collector (6);
the drying unit is used for carrying out drying and curing treatment on the coated current collector (6);
the thickness measuring unit is arranged between the spraying unit and the drying unit and is used for measuring the thickness of the conductive slurry coating on the current collector (6);
the driving assembly is used for driving the sliding table (3) to horizontally move along the guide rail (2); and
the controller (20) is electrically connected with the driving assembly, the spraying assembly, the thickness measuring unit and the drying unit; the thickness measuring unit is used for obtaining the thickness of an input coating required by the outside and the actual coating thickness measured by the thickness measuring unit and judging whether the actual coating thickness reaches the thickness of the input coating; when the actual coating thickness is smaller than the input coating thickness, the controller (20) controls the driving assembly to drive the sliding table (3) to return to the initial position and judges whether the difference value between the actual coating thickness and the input coating thickness is larger than a set value or not, if yes, the spraying amount of the spraying unit in unit time is controlled to be increased and spraying is carried out again; if not, controlling the spraying amount of the spraying unit in unit time to be reduced and spraying again; until the actual coating thickness reaches the input coating thickness, the controller (20) controls the driving assembly to drive the tool table (4) to enter the drying unit, and the coating on the surface of the current collector (6) is dried and cured;
the spray unit includes:
the material storage box (7) is fixedly arranged on the bottom plate (1) through a first bracket (8);
the output pumps (9) are symmetrically arranged on two sides of the bottom of the material storage box (7); the output end of the output pump (9) is connected with a discharge pipe (10);
the connecting pipe (12) is connected to one end, far away from the output pump (9), of the discharge pipe (10); and
the spraying plate (13) is arranged at one end of the connecting pipe (12) far away from the discharge pipe (10), and a plurality of spray heads (14) are equidistantly distributed on the spraying plate (13);
the connection part of the discharge pipe (10) and the connecting pipe (12) is also provided with an adjusting valve (11), and the adjusting valve (11) is used for adjusting the flow of the conductive slurry;
the controller (20) is also used for controlling the regulating valve (11) to regulate the opening, and when the difference between the actual thickness of the coating and the input thickness exceeds a set difference range, the spraying amount of the spray head (14) in unit time is increased until the set difference range is reached; and when the difference between the actual thickness of the coating and the input thickness is smaller than the set difference range, reducing the spraying amount of the spray head (14) in unit time.
2. The carbon-coated foil coating equipment for the lithium ion battery is characterized in that the spray heads (14) on the spray plates (13) on the two sides are opposite to the surface of the current collector (6), the spray heads (14) on the spray plates (13) are integrally vertically arranged, and the distance between the head spray head and the tail spray head (14) is greater than the width of the current collector (6).
3. The carbon-coated foil coating apparatus for lithium ion batteries according to claim 1, wherein the driving assembly comprises:
a motor (22) fixedly mounted on one side of the guide rail (2) through a mounting plate (21);
a gear (23) attached to an output shaft of the motor (22); and
and the rack (24) is arranged on the sliding table (3), and the rack (24) is in meshing transmission with the gear (23).
4. The carbon-coated foil coating device for the lithium ion battery as recited in claim 1, wherein the drying unit comprises a drying box (15), the drying box (15) is fixed on the bottom plate (1) through a second bracket (16), a heating element is arranged in the drying box (15), and a channel (17) is formed in the bottom of the drying box (15).
5. The carbon-coated foil coating apparatus for a lithium ion battery according to claim 4, wherein the heating member is a heating wire or a hot air duct.
6. The carbon-coated foil coating equipment for the lithium ion battery is characterized in that the thickness measuring unit comprises three supports (18) and thickness gauges (19), the three supports (18) are divided into two groups and are symmetrically distributed on two sides of the guide rail (2), the third supports (18) are fixedly arranged on the bottom plate (1), and the thickness gauges (19) are arranged on the third supports (18) on two sides.
7. The carbon-coated foil coating method for a lithium ion battery, which is applied to the carbon-coated foil coating apparatus for a lithium ion battery according to any one of claims 1 to 6, is characterized by comprising the steps of:
the method comprises the following steps that firstly, a controller (20) controls a driving assembly to drive a sliding table (3) to feed forward, a spraying assembly conducts conductive slurry spraying on the two sides of a current collector (6), and a thickness measuring unit measures the thickness of a coating;
step two, the controller (20) acquires the thickness of an input coating required by the outside, acquires the actual coating thickness on the current collector (6) measured by the thickness measuring unit, and judges whether the current actual coating thickness reaches the thickness of the input coating; if yes, executing a fifth step; if not, executing the step three;
step three, the controller (20) controls the driving assembly to drive the sliding table (3) to reversely return to the initial position;
step four, the controller (20) judges whether the difference value between the actual coating thickness and the input coating thickness is larger than a set value again; if yes, the controller (20) controls the spraying amount of the spraying unit to increase in unit time and executes the step one again; if not, the controller (20) controls the spraying amount of the spraying unit to be reduced in unit time and executes the step one again;
and step five, the controller (20) controls the driving assembly to drive the tool table (4) to enter the drying unit, and the coating on the surface of the current collector (6) is dried and cured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211587598.XA CN115646682B (en) | 2022-12-12 | 2022-12-12 | Carbon-coated foil coating equipment and method for lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211587598.XA CN115646682B (en) | 2022-12-12 | 2022-12-12 | Carbon-coated foil coating equipment and method for lithium ion battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115646682A CN115646682A (en) | 2023-01-31 |
| CN115646682B true CN115646682B (en) | 2023-04-07 |
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| CN103940350B (en) * | 2014-02-19 | 2017-01-04 | 超威电源有限公司 | Coating machine online pole plate measuring thickness device and thickness measuring method of adjustment |
| CN207204452U (en) * | 2017-07-10 | 2018-04-10 | 衢州职业技术学院 | A kind of two-sided jet plane for plank spray painting |
| CN108480097A (en) * | 2018-05-26 | 2018-09-04 | 芜湖良匠机械制造有限公司 | A kind of steel plate automatic paint spraying apparatus |
| CN112403730A (en) * | 2020-11-09 | 2021-02-26 | 邵阳市北塔区宜家防盗门厂 | Paint spraying apparatus is used in burglary-resisting door processing that possesses two-sided spraying function |
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