Intelligent limited oil coating mechanism

Abstract

The application discloses a kind of intelligent limited oiling mechanism, belong to battery pole piece lithium supplement equipment technical field, including pole piece unwinding drum, the left side and right side of pole piece are rotatably connected with first calendering film roller and second calendering film roller, and the oil brush on first calendering roller, first calendering film roller, second calendering film roller and second calendering roller is respectively connected with first precision oil injection mechanism, second precision oil injection mechanism, third precision oil injection mechanism and fourth precision oil injection mechanism by pipeline, and first precision throttle valve, second precision throttle valve, third precision throttle valve and fourth precision throttle valve are respectively installed on pipeline, and the front end of first calendering roller, first calendering film roller, second calendering film roller and second calendering roller is equipped with roller cleaning mechanism, the present application can realize the strict control of the surface of different function's calendering roller's oiling thickness, to reach smoothly calendering and transfer lithium film according to specified path, finally reach the purpose of smoothly calendering and film coating under the premise of no traction film and protective film.

Description

[0001] This invention is a divisional application of Chinese invention patent entitled "An Intelligent Limited Oiling Mechanism" with application number 202110293779.0 and application date of March 19, 2021. Technical Field

[0002] This invention relates to the field of lithium replenishment equipment for battery electrodes, and more specifically, to an intelligent limited-quantity oiling mechanism. Background Technology

[0003] Lithium-ion batteries are widely used in consumer electronics and electric vehicles due to their high energy density, long lifespan, and environmentally friendly nature. However, during the first charge and discharge cycle, a solid electrolyte interphase (SEI) film forms in lithium-ion batteries. This SEI film consumes some lithium, resulting in irreversible initial capacity loss, which directly leads to a loss of battery capacity. To compensate for this lithium loss, a process for replenishing lithium on the battery electrodes has been developed.

[0004] Traditional lithium replenishment processes have two sets of rolling mechanisms corresponding to the front and back of the electrode. The lithium strip is rolled into a lithium film that meets the process requirements. Then, a traction film is used to pull the rolled lithium film onto the coating mechanism and transfer it to the electrode. This process requires the consumption of a traction film equivalent to twice the length of the electrode and a protective film equivalent to 2 / 5 of the length of the electrode. Since the traction film and the protective film are not reusable, the cost of use is extremely high. Therefore, we propose an intelligent limited-quantity oiling mechanism. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] To address the problems existing in the prior art, the present invention aims to provide an intelligent limited-oil coating mechanism that can strictly control the oil coating thickness on the surface of pressure rollers with different functions, so as to achieve smooth calendering and transfer of lithium film along a specified path, and ultimately achieve the purpose of smooth calendering and coating without traction film and protective film. The manufacturing process is simple and the production cost is low.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution:

[0009] An intelligent limited-quantity oiling mechanism includes an electrode unwinding drum, which is connected to an electrode take-up drum via the electrode. A first calendering and coating roller and a second calendering and coating roller are rotatably connected to the left and right sides of the electrode. A first calendering roller is rotatably connected to the outer side of the first calendering and coating roller, and a second calendering roller is rotatably connected to the outer side of the second calendering and coating roller. A second lithium belt traction mechanism is connected between the first calendering roller and the first calendering and coating roller via a lithium belt. The second lithium belt traction mechanism is rotatably connected to a second lithium belt unwinding drum via a lithium belt. A first lithium belt traction mechanism is connected between the second calendering and coating roller and the second calendering roller via a lithium belt. The first lithium belt traction mechanism is connected to a first lithium belt unwinding drum via a lithium belt. The first calendering roller, the first calendering and coating roller, and the second calendering and coating roller are connected to the first calendering and coating roller. Oil brushes are installed on the circumferential surfaces of the first calendering roll and the second calendering roll. The oil brushes on the first calendering roll are connected to a first precision oil injection mechanism via pipes, and a first precision throttle valve is installed on the pipes. The oil brushes on the first calendering roll are connected to a second precision oil injection mechanism via pipes, and a second precision throttle valve is installed on the pipes. The oil brushes on the second calendering roll are connected to a third precision oil injection mechanism via pipes, and a third precision throttle valve is installed on the pipes. The oil brushes on the second calendering roll are connected to a fourth precision oil injection mechanism via pipes, and a fourth precision throttle valve is installed on the pipes. A roll cleaning mechanism is installed at the front end of the four oil brushes relative to the rotation direction of the first calendering roll, the first calendering roll, the second calendering roll, and the second calendering roll.

[0010] In a preferred embodiment of the present invention, the first calendering roll and the second calendering roll are slow-speed rolls, and the first calendering and coating roll and the second calendering and coating roll are fast-speed rolls.

[0011] As a preferred embodiment of the present invention, the oil film thickness of the first calendering roll and the second calendering roll is three times that of the first calendering coating roll and the second calendering coating roll. The release force of the first calendering coating roll and the second calendering coating roll is greater than that of the first calendering roll and the second calendering roll. At the same time, the release force of the first calendering coating roll and the second calendering coating roll is smaller than that of the electrode sheet.

[0012] As a preferred embodiment of the present invention, the first calendering roll and the second calendering roll, as well as the first calendering coating roll and the second calendering coating roll, are symmetrically arranged with respect to the electrode sheet in two parts.

[0013] As a preferred embodiment of the present invention, the rotation directions of the first calendering roll, the first calendering and coating roll, the second calendering and coating roll, and the second calendering roll are opposite to each other.

[0014] As a preferred embodiment of the present invention, the first lithium belt traction mechanism and the second lithium belt traction mechanism have the same specifications and are symmetrical about the electrode.

[0015] As a preferred embodiment of the present invention, the first precision oil injection mechanism, the second precision oil injection mechanism, the third precision oil injection mechanism and the fourth precision oil injection mechanism are of the same model and specifications, and each is composed of a servo motor and an output oil cylinder.

[0016] As a preferred embodiment of the present invention, the first precision throttle valve, the second precision throttle valve, the third precision throttle valve and the fourth precision throttle valve have the same specifications and models, and all of them are throttle valves of model SMC VEX1.

[0017] As a preferred embodiment of the present invention, four cleaning roller mechanisms are symmetrically arranged, each consisting of a scraper and a vacuum nozzle.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the advantages of this invention are:

[0020] (1) The oil film thickness of the first calendering roll and the second calendering roll in this scheme is three times that of the first calendering coating roll and the second calendering coating roll, ensuring that most of the lithium foil after calendering is attached to the first calendering coating roll and the second calendering coating roll. The electrode is between the two fast rolls. The lithium foil on the A and B sides is embedded into the front and back sides of the electrode under the pressure of the two fast rolls. Since the surface roughness of the electrode is relatively high, the lithium foil attached to the fast roll can be 100% transferred to the electrode. The manufacturing process is simple and the production cost is low.

[0021] (2) This solution sets up a first precision throttle valve, a second precision throttle valve, a third precision throttle valve, and a fourth precision throttle valve to adjust the real-time flow rate according to the linear speed of the corresponding pressure roller. The process is automatically closed-loop controlled. By setting up a first precision oil injection mechanism, a second precision oil injection mechanism, a third precision oil injection mechanism, and a fourth precision oil injection mechanism, as well as a first precision throttle valve, a second precision throttle valve, a third precision throttle valve, and a fourth precision throttle valve, the oil injection amount is adjusted according to the linear speed of the corresponding roller based on system feedback. The amount of oil applied per unit time is independently controlled. Then, the oiling area is calculated based on the belt speed of the pressure roller and the effective width of the oiling area. The oil film thickness per unit area of ​​the oiling surface is then calculated, which can effectively avoid the waste of resources.

[0022] (3) The cleaning roller mechanism of this scheme is symmetrically set with four parts, each consisting of a scraper and a vacuum nozzle. By setting the cleaning roller mechanism, the purpose of accurately controlling the amount of oil injected can be achieved. In addition to cleaning the lithium residue on the pressure roller, the cleaning roller mechanism can clean more than 98% of the residual oil film on the roller surface under the combined action of the scraper and the vacuum nozzle. Finally, under the premise that the amount of oil injected remains stable, the thickness of the oil film generated on the roller surface is within the range of process requirements. Attached Figure Description

[0023] Figure 1This is a perspective view of an intelligent limited-quantity oiling mechanism according to the present invention;

[0024] Figure 2 This is a schematic diagram of the operation of an intelligent limited-quantity oiling mechanism according to the present invention;

[0025] Figure 3 This is an enlarged view of the structure of the first calendering and coating roller and the second calendering and coating roller in the intelligent limited oiling mechanism of the present invention;

[0026] Figure 4 This is a schematic diagram of lithium replenishment on the first calendering and coating rollers and the second calendering and coating rollers in an intelligent limited-quantity oiling mechanism of the present invention.

[0027] Explanation of the labels in the diagram:

[0028] 1. Electrode unwinding drum; 2. Electrode winding drum; 3. First lithium strip unwinding drum; 4. Second lithium strip unwinding drum; 5. First calendering roll; 6. First calendering and coating roll; 7. Second calendering and coating roll; 8. Second calendering roll; 9. First lithium strip traction mechanism; 10. Second lithium strip traction mechanism; 11. First precision oiling mechanism; 12. Second precision oiling mechanism; 13. Third precision oiling mechanism; 14. Fourth precision oiling mechanism; 15. First precision throttle valve; 16. Second precision throttle valve; 17. Third precision throttle valve; 18. Fourth precision throttle valve; 19. Oil brush; 20. Cleaning roll mechanism. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0031] Therefore, this should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example:

[0034] Please see Figure 1-4 An intelligent limited-quantity oiling mechanism includes an electrode unwinding drum 1, which is connected to an electrode take-up drum 2 via an electrode. A first calendering and coating roller 6 and a second calendering and coating roller 7 are rotatably connected to the left and right sides of the electrode. A first calendering roller 5 is rotatably connected to the outer side of the first calendering and coating roller 6, and a second calendering roller 8 is rotatably connected to the outer side of the second calendering and coating roller 7. A second lithium belt traction mechanism 10 is connected between the first calendering roller 5 and the first calendering and coating roller 6 via a lithium belt. The second lithium belt traction mechanism 10 is rotatably connected to a second lithium belt unwinding drum 4 via a lithium belt. A first lithium belt traction mechanism 9 is connected between the second calendering and coating roller 7 and the second calendering roller 8 via a lithium belt. The first lithium belt traction mechanism 9 is connected to a first lithium belt unwinding drum 3 via a lithium belt. The first calendering roller 5, the first calendering and coating roller 6, the second calendering and coating roller 7, and the first calendering and coating roller 8 are rotatably connected to the first calendering roller 6. Oil brushes 19 are installed on the circumferential surfaces of the two calendering rolls 8. The oil brushes 19 on the first calendering roll 5 are connected to the first precision oiling mechanism 11 through pipes, and the pipes are equipped with the first precision throttle valve 15. The oil brushes 19 on the first calendering and coating roll 6 are connected to the second precision oiling mechanism 12 through pipes, and the pipes are equipped with the second precision throttle valve 16. The oil brushes 19 on the second calendering and coating roll 7 are connected to the third precision oiling mechanism 13 through pipes, and the pipes are equipped with the third precision throttle valve 17. The oil brushes 19 on the second calendering roll 8 are connected to the fourth precision oiling mechanism 14 through pipes, and the pipes are equipped with the fourth precision throttle valve 18. A cleaning mechanism 20 is installed at the front end of the four oil brushes 19 relative to the rotation direction of the first calendering roll 5, the first calendering and coating roll 6, the second calendering and coating roll 7, and the second calendering roll 8.

[0035] In this embodiment, the electrode unwinding drum 1 and the electrode winding drum 2 are configured to unwind and wind the electrode. The first calendering roller 5 and the second calendering roller 8 are configured to press the pulled lithium strip onto the surfaces of the first calendering coating roller 6 and the second calendering coating roller 7, respectively. Under the action of the first calendering coating roller 6 and the second calendering coating roller 7, lithium foil can be pressed onto both sides A and B of the electrode. The operation is simple and highly practical. The first lithium strip traction mechanism 9 and the second lithium strip traction mechanism 10 are configured to guide the lithium strip within the first lithium strip unwinding drum 3 and the second lithium strip unwinding drum 4. The lithium strip is pulled out. The first precision oil injection mechanism 11, the second precision oil injection mechanism 12, the third precision oil injection mechanism 13, and the fourth precision oil injection mechanism 14 are of the same model and specifications, and each consists of a servo motor and an output oil cylinder. By setting the first precision oil injection mechanism 11, the second precision oil injection mechanism 12, the third precision oil injection mechanism 13, and the fourth precision oil injection mechanism 14, oil can be output according to the set parameters, thereby ensuring accurate oil output, avoiding resource waste, and reducing costs. By setting the first precision throttle valve 15, the second precision throttle valve 16, the third precision throttle valve 14, and the fourth precision throttle valve 15, the oil can be output according to the set parameters, thereby ensuring accurate oil output, avoiding resource waste, and reducing costs. Throttling valve 17 and fourth precision throttling valve 18 adjust the real-time flow rate according to the linear speed of the corresponding pressure roller. The process is automatically controlled in a closed loop. By setting the first precision oil injection mechanism 11, the second precision oil injection mechanism 12, the third precision oil injection mechanism 13, and the fourth precision oil injection mechanism 14, as well as the first precision throttling valve 15, the second precision throttling valve 16, the third precision throttling valve 17, and the fourth precision throttling valve 18, the oil injection amount is adjusted according to the linear speed of the corresponding roller based on system feedback, independently controlling the amount of oil applied per unit time. Furthermore, the oil application amount is adjusted according to the belt speed of the pressure roller and the effective width of the oil application. Calculating the oiling area and then the oil film thickness per unit area effectively avoids resource waste. Four cleaning roller mechanisms 20 are symmetrically arranged, each consisting of a scraper and a vacuum nozzle. By setting up the cleaning roller mechanism 20, the purpose of accurately controlling the oil injection amount can be achieved. In addition to cleaning the residual lithium shavings on the pressure roller, the cleaning roller mechanism 20 can clean more than 98% of the residual oil film on the roller surface under the combined action of the scraper and the vacuum nozzle. Finally, under the premise of keeping the oil injection amount stable, the thickness of the oil film generated on the roller surface is within the process requirements range per unit time.

[0036] Specifically, the first calendering roll 5 and the second calendering roll 8 are slow-speed rolls, while the first calendering and coating roll 6 and the second calendering and coating roll 7 are fast-speed rolls.

[0037] In this embodiment, the first calendering roller 5 and the second calendering roller 8 only play the role of calendering output during operation, and do not allow the calendered lithium film to adhere to them. The first calendering coating roller 6 and the second calendering coating roller 7 are high-speed rollers, which not only play the role of calendering, but also undertake the role of transferring the calendered lithium film to the electrode end and participating in the role of coating the lithium film onto the electrode.

[0038] Specifically, the oil film thickness of the first calendering roll 5 and the second calendering roll 8 is three times that of the first calendering coating roll 6 and the second calendering coating roll 7. The release force of the first calendering coating roll 6 and the second calendering coating roll 7 is greater than that of the first calendering roll 5 and the second calendering roll 8. At the same time, the release force of the first calendering coating roll 6 and the second calendering coating roll 7 is smaller than that of the electrode sheet.

[0039] In this embodiment, the oil film thickness of the first calendering roll 5 and the second calendering roll 8 is three times that of the first calendering coating roll 6 and the second calendering coating roll 7, ensuring that most of the calendered lithium foil adheres to the first calendering coating roll 6 and the second calendering coating roll 7. The electrode is located between the two fast rollers. Under the pressure of the two fast rollers, the lithium foil on sides A and B is embedded into the front and back surfaces of the electrode. Due to the relatively high surface roughness of the electrode, the lithium foil attached to the fast rollers can be 100% transferred to the electrode.

[0040] Specifically, the first calendering roll 5 and the second calendering roll 8, as well as the first calendering coating roll 6 and the second calendering coating roll 7, are symmetrically arranged with respect to the electrode sheet in twos.

[0041] In this embodiment, by setting the first calendering roller 5 and the second calendering roller 8, the pulled lithium strip can be pressed onto the surfaces of the first calendering coating roller 6 and the second calendering coating roller 7 respectively. Under the action of the first calendering coating roller 6 and the second calendering coating roller 7, the lithium foil can be pressed onto both sides A and B of the electrode sheet. The operation is simple and highly practical.

[0042] Specifically, the rotation directions of the first calendering roll 5, the first calendering and coating roll 6, the second calendering and coating roll 7, and the second calendering roll 8 are opposite to each other.

[0043] In this embodiment, during the operation, the oil coating thickness on the surface of the pressure rollers with different functions is strictly controlled to achieve smooth calendering and transfer of lithium film along a specified path, ultimately achieving smooth calendering and coating without traction film and protective film.

[0044] Specifically, the first lithium belt traction mechanism 9 and the second lithium belt traction mechanism 10 have the same specifications and are symmetrical about the electrode sheets.

[0045] In this embodiment, by setting the first lithium strip traction mechanism 9 and the second lithium strip traction mechanism 10, the lithium strip in the first lithium strip unwinding drum 3 and the second lithium strip unwinding drum 4 can be pulled out, which is simple to operate.

[0046] Specifically, the first precision oil injection mechanism 11, the second precision oil injection mechanism 12, the third precision oil injection mechanism 13 and the fourth precision oil injection mechanism 14 have the same model and specifications, and all of them are composed of a servo motor and an output oil cylinder.

[0047] In this embodiment, by setting the first precision oil injection mechanism 11, the second precision oil injection mechanism 12, the third precision oil injection mechanism 13 and the fourth precision oil injection mechanism 14, oil can be output according to the set parameters, thereby ensuring accurate oil output, avoiding waste of resources, lower cost, strong practicality and easy to promote and utilize.

[0048] Specifically, the first precision throttle valve 15, the second precision throttle valve 16, the third precision throttle valve 17, and the fourth precision throttle valve 18 have the same specifications and models, and all of them are throttle valves of model SMC VEX1.

[0049] In this embodiment, by setting the first precision throttle valve 15, the second precision throttle valve 16, the third precision throttle valve 17, and the fourth precision throttle valve 18, the real-time flow rate is adjusted according to the linear speed of the corresponding pressure roller, and the process is automatically closed-loop controlled. By setting the first precision oil injection mechanism 11, the second precision oil injection mechanism 12, the third precision oil injection mechanism 13, and the fourth precision oil injection mechanism 14, as well as the first precision throttle valve 15, the second precision throttle valve 16, the third precision throttle valve 17, and the fourth precision throttle valve 18, the oil injection amount is adjusted according to the linear speed of the corresponding roller based on system feedback, and the oil coating amount per unit time is independently controlled. Then, the oil coating area is calculated based on the belt speed of the pressure roller and the effective width of the oil coating, and the oil film thickness per unit area of ​​the oil coating surface is calculated, which can effectively avoid the waste of resources.

[0050] Specifically, there are four symmetrically arranged cleaning roller mechanisms 20, each consisting of a scraper and a vacuum nozzle.

[0051] In this embodiment, by setting up the cleaning roller mechanism 20, the purpose of accurately controlling the amount of oil injected can be achieved. In addition to cleaning the residual lithium shavings on the pressure roller, the cleaning roller mechanism 20 can clean more than 98% of the residual oil film on the roller surface under the combined action of the scraper and the vacuum nozzle. Finally, under the premise that the amount of oil injected remains stable, the thickness of the oil film generated on the roller surface is within the range of process requirements.

[0052] Working Principle: An electrode unwinding drum 1 is connected to an electrode take-up drum 2 via the electrode sheet. The unwinding and take-up drums 1 and 2 enable unwinding and rewinding of the electrode sheet. A first calendering and coating roller 6 and a second calendering and coating roller 7 are rotatably connected to the left and right sides of the electrode sheet. A first calendering roller 5 is rotatably connected to the outer side of the first calendering and coating roller 6, and a second calendering roller 8 is rotatably connected to the outer side of the second calendering and coating roller 7. The first calendering roller 5 and the second calendering roller 8 are slow rollers, while the first calendering and coating roller 6 and the second calendering and coating roller 7 are fast rollers. During operation, the first calendering roller 5 and the second calendering roller 8 only provide calendering output and do not allow the calendered lithium film to adhere to them. The first calendering and coating roller 6 and the second calendering and coating roller 7, being fast rollers, perform both calendering and... To transfer the calendered lithium film to the electrode end and participate in bonding the lithium film to the electrode, the oil film thickness of the first calendering roll 5 and the second calendering roll 8 is three times that of the first calendering coating roll 6 and the second calendering coating roll 7. The release force of the first calendering coating roll 6 and the second calendering coating roll 7 is greater than that of the first calendering roll 5 and the second calendering roll 8, while the release force of the first calendering coating roll 6 and the second calendering coating roll 7 is smaller than that of the electrode. The oil film thickness of the first calendering roll 5 and the second calendering roll 8 is three times that of the first calendering coating roll 6 and the second calendering coating roll 7, ensuring that the vast majority of the calendered lithium foil adheres to the first calendering coating roll 6 and the second calendering coating roll 7. The electrode is located between the two high-speed rolls, and the lithium foil on sides A and B is embedded into the electrode under the pressure of the two high-speed rolls. On both sides of the electrode sheet, due to the relatively high surface roughness of the electrode sheet, the lithium foil adhering to the high-speed roller can be 100% transferred to the electrode sheet. The first calendering roller 5 and the second calendering roller 8, as well as the first calendering coating roller 6 and the second calendering coating roller 7, are symmetrically arranged with respect to the electrode sheet in two configurations. By setting the first calendering roller 5 and the second calendering roller 8, the pulled-out lithium strip can be pressed onto the surfaces of the first calendering coating roller 6 and the second calendering coating roller 7 respectively. Under the action of the first calendering coating roller 6 and the second calendering coating roller 7, the lithium foil can be pressed onto both sides A and B of the electrode sheet. The rotation directions of the first calendering roller 5, the first calendering coating roller 6, the second calendering coating roller 7, and the second calendering roller 8 are opposite to each other. During operation, the oil coating thickness on the surfaces of the rollers with different functions is strictly controlled to achieve smooth rotation. The lithium film is transferred along a designated path during calendering, ultimately achieving smooth calendering and coating without the need for a traction film or protective film. A second lithium strip traction mechanism 10 is connected between the first calendering roll 5 and the first calendering coating roll 6 via a lithium strip. The second lithium strip traction mechanism 10 is rotatably connected to a second lithium strip unwinding drum 4 via the lithium strip. A first lithium strip traction mechanism 9 is connected between the second calendering coating roll 7 and the second calendering roll 8 via a lithium strip. The first lithium strip traction mechanism 9 is connected to a first lithium strip unwinding drum 3 via the lithium strip. The specifications of the first lithium strip traction mechanism 9 and the second lithium strip traction mechanism 10 are consistent and symmetrical about the electrode. By setting the first lithium strip traction mechanism 9 and the second lithium strip traction mechanism 10, the lithium strip in the first lithium strip unwinding drum 3 and the second lithium strip unwinding drum 4 can be pulled out.Oil brushes 19 are installed on the circumferential surfaces of the first calendering roll 5, the first calendering and coating roll 6, the second calendering and coating roll 7, and the second calendering roll 8. The oil brushes 19 on the first calendering roll 5 are connected to a first precision oiling mechanism 11 via pipes, and a first precision throttle valve 15 is installed on the pipes. The oil brushes 19 on the first calendering and coating roll 6 are connected to a second precision oiling mechanism 12 via pipes, and a second precision throttle valve 16 is installed on the pipes. The oil brushes 19 on the second calendering and coating roll 7 are connected to a third precision oiling mechanism 13 via pipes, and a third precision throttle valve 17 is installed on the pipes. The oil brushes 19 on the second calendering roll 8 are connected to a fourth precision oiling mechanism 14 via pipes, and a fourth precision throttle valve 18 is installed on the pipes. The four oil brushes 19 are positioned relative to the first calendering roll 5, the first calendering and coating roll 6, the second calendering and coating roll 7, and the second calendering roll 8. A cleaning mechanism 20 is installed at the front end of the coating roller 6, the second calendering coating roller 7, and the second calendering roller 8 in the direction of rotation. The first precision oil injection mechanism 11, the second precision oil injection mechanism 12, the third precision oil injection mechanism 13, and the fourth precision oil injection mechanism 14 are of the same model and specifications, and are all composed of servo motors and output cylinders. By setting the first precision oil injection mechanism 11, the second precision oil injection mechanism 12, the third precision oil injection mechanism 13, and the fourth precision oil injection mechanism 14, oil can be output according to the set parameters, thereby ensuring accurate oil output, avoiding resource waste, low cost, strong practicality, and easy promotion and utilization. The first precision throttle valve 15, the second precision throttle valve 16, the third precision throttle valve 17, and the fourth precision throttle valve 18 are of the same model and are all selected from SMC models. The VEX1's throttle valves, through the setting of a first precision throttle valve 15, a second precision throttle valve 16, a third precision throttle valve 17, and a fourth precision throttle valve 18, adjust the real-time flow rate according to the linear speed of the corresponding pressure roller, with automatic closed-loop control of the process. Through the setting of a first precision oil injection mechanism 11, a second precision oil injection mechanism 12, a third precision oil injection mechanism 13, and a fourth precision oil injection mechanism 14, as well as the first precision throttle valves 15, 16, 17, and 18, the oil injection amount is adjusted according to the system feedback of the linear speed of the corresponding roller, independently controlling the amount of oil applied per unit time. Furthermore, based on the belt speed of the pressure roller and the oil application... The effective width is used to calculate the oiling area, and then the oil film thickness per unit area of ​​the oiled surface is calculated, which effectively avoids resource waste. Four cleaning roller mechanisms 20 are symmetrically arranged, each consisting of a scraper and a vacuum nozzle. By setting up the cleaning roller mechanism 20, the oil injection amount can be precisely controlled. In addition to cleaning residual lithium debris on the pressure roller, the cleaning roller mechanism 20, through the combined action of the scraper and vacuum nozzle, can clean more than 98% of the residual oil film on the roller surface. Finally, under the premise of maintaining a stable oil injection amount per unit time, the thickness of the oil film generated on the roller surface is within the process requirements, thus enabling the calendering lithium replenishment process to be met even without the traction film and protective film.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. An intelligent limited-quantity oiling mechanism, comprising an electrode unwinding drum (1), characterized in that: The electrode unwinding drum (1) is connected to the electrode winding drum (2) via the electrode. The left and right sides of the electrode are rotatably connected to the first calendering and coating roller (6) and the second calendering and coating roller (7). The outer side of the first calendering and coating roller (6) is rotatably connected to the first calendering roller (5), and the outer side of the second calendering and coating roller (7) is rotatably connected to the second calendering roller (8). The oil film thickness of the first calendering roller (5) and the second calendering roller (8) is three times that of the first calendering and coating roller (6) and the second calendering and coating roller (7). A second lithium belt traction mechanism (10) is connected between the first calendering roll (5) and the first calendering coating roll (6) via a lithium belt. The second lithium belt traction mechanism (10) is rotatably connected to a second lithium belt unwinding drum (4) via a lithium belt. A first lithium belt traction mechanism (9) is connected between the second calendering coating roll (7) and the second calendering roll (8) via a lithium belt. The first lithium belt traction mechanism (9) is connected to a first lithium belt unwinding drum (3) via a lithium belt. Oil brushes (19) are installed on the circumferential surfaces of the first calendering roll (5), the first calendering and coating roll (6), the second calendering and coating roll (7), and the second calendering roll (8). The oil brushes (19) on the first calendering roll (5) are connected to a first precision oiling mechanism (11) via pipes, and a first precision throttle valve (15) is installed on the pipes. The oil brushes (19) on the first calendering and coating roll (6) are connected to a second precision oiling mechanism (12) via pipes, and a second precision throttle valve (16) is installed on the pipes. The oil brush (19) on the calendering roll (7) is connected to a third precision oil injection mechanism (13) through a pipe, and a third precision throttle valve (17) is installed on the pipe. The oil brush (19) on the second calendering roll (8) is connected to a fourth precision oil injection mechanism (14) through a pipe, and a fourth precision throttle valve (18) is installed on the pipe. A cleaning roll mechanism (20) is installed at the front end of the oil brush (19) relative to the rotation direction of the first calendering roll (5), the first calendering roll (6), the second calendering roll (7), and the second calendering roll (8). The first calendering roll (5) and the second calendering roll (8) are slow-speed rolls, and the first calendering and coating roll (6) and the second calendering and coating roll (7) are fast-speed rolls; The first lithium belt traction mechanism (9) and the second lithium belt traction mechanism (10) have the same specifications and are symmetrical about the electrode.

2. The intelligent limited-quantity oiling mechanism according to claim 1, characterized in that: The release force of the first calendering and coating roller (6) and the second calendering and coating roller (7) is greater than that of the first calendering roller (5) and the second calendering roller (8), while the release force of the first calendering and coating roller (6) and the second calendering and coating roller (7) is smaller than that of the electrode sheet.

3. The intelligent limited-quantity oiling mechanism according to claim 1, characterized in that: The first calendering roll (5) and the second calendering roll (8), as well as the first calendering coating roll (6) and the second calendering coating roll (7), are symmetrically arranged with respect to the electrode sheet in two forms.

4. The intelligent limited-quantity oiling mechanism according to claim 1, characterized in that: The rotation directions of the first calendering roll (5), the first calendering and coating roll (6), the second calendering and coating roll (7), and the second calendering roll (8) are opposite to each other.

5. The intelligent limited-quantity oiling mechanism according to claim 1, characterized in that: The first precision oil injection mechanism (11), the second precision oil injection mechanism (12), the third precision oil injection mechanism (13) and the fourth precision oil injection mechanism (14) have the same model and specifications, and are all composed of a servo motor and an output oil cylinder.

6. The intelligent limited-quantity oiling mechanism according to claim 1, characterized in that: The first precision throttle valve (15), the second precision throttle valve (16), the third precision throttle valve (17) and the fourth precision throttle valve (18) have the same specifications and models, and all of them are throttle valves of model SMC VEX1; the cleaning roller mechanism is symmetrically arranged in four parts, and each part is composed of a scraper and a vacuum nozzle.

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