Coating system

Abstract

The utility model provides a coating system. The coating system comprises a monitoring assembly, an upper computer (2), an adjusting assembly (3) and a coating assembly (4), the monitoring assembly and the adjusting assembly (3) are both in communication connection with the upper computer (2), the monitoring assembly can monitor the surface density of slurry on the surface of the pole piece, the coating assembly (4) comprises a discharging channel (41), the adjusting assembly (3) can stretch into the discharging channel (41) to adjust the coating flow, and the discharging channel (41) is communicated with the upper computer (2). The upper computer (2) can automatically analyze surface density monitoring data of the monitoring assembly and control the adjusting assembly (3) to adjust the coating flow. According to the coating system provided by the utility model, the problem of low monitoring and adjusting efficiency of the surface density of the existing coating system can be solved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery electrode coating technology, and more specifically, to a coating system. Background Technology

[0002] Lithium-ion batteries, as the cornerstone of modern energy storage technology, have not only driven the revolution in global mobile electronic devices but also promoted the development of electric vehicles and renewable energy systems, making them a key technology for achieving low-carbon economy and sustainable development goals. Coating is an essential step in the manufacturing process of lithium-ion batteries. Areal density refers to the mass of electrode material per unit area, directly affecting the battery's energy density and performance. In the coating process, the uniformity and thickness control of the slurry coating determine the final electrode's areal density. Uneven slurry coating or temperature fluctuations during drying can lead to fluctuations in electrode areal density, resulting in a large number of scrapped electrodes. To avoid abnormal areal density leading to electrode scrap and increased production costs, it is necessary to monitor and control the areal density in the coating process.

[0003] In traditional lithium battery coating systems, the monitoring and control of areal density mainly rely on manual labor, which is inefficient. Operators check the areal density of the coated electrodes at regular intervals. If an abnormality is detected, the machine often needs to be stopped for inspection. The operator then manually adjusts the distance between the nozzle and the substrate or the flow rate of the slurry. This process is not only time-consuming but may also lead to the scrapping of a large number of electrodes, seriously affecting production efficiency and greatly increasing production costs. Utility Model Content

[0004] The main objective of this invention is to provide a coating system that can solve the problem of low efficiency in monitoring and adjusting the surface density of existing coating systems.

[0005] To achieve the above objectives, according to one aspect of the present invention, a coating system is provided, including a monitoring component, a host computer, an adjustment component, and a coating component. Both the monitoring component and the adjustment component are communicatively connected to the host computer. The monitoring component can monitor the areal density of the slurry on the electrode surface. The coating component includes a discharge channel. The adjustment component can extend into the discharge channel to adjust the coating flow rate. The host computer can automatically analyze the areal density monitoring data of the monitoring component and control the adjustment component to adjust the coating flow rate.

[0006] Furthermore, the coating assembly includes a coating die head, which includes an upper template and a middle template. The upper template is disposed on the middle template, and a first partition is provided between the upper template and the middle template. At least one discharge channel is provided on the first partition, and a discharge port is provided on the discharge side of the first partition, which is connected to the discharge channel.

[0007] Furthermore, the adjustment component includes a drive unit and a flow regulator. The drive unit is mounted on the upper template, and the flow regulator is mounted on the drive end of the drive unit. The drive unit can drive the flow regulator to extend into the discharge channel to adjust the paint flow rate. The drive unit is communicatively connected to the host computer.

[0008] Furthermore, the first interval includes a back interval section and side interval sections disposed on both sides of the back interval section. A first clearance groove is provided on the side interval section, and the first clearance groove corresponds to the adjustment component.

[0009] Furthermore, the first interval is provided with multiple discharge channels, which are arranged side by side and spaced apart along the length of the first interval. A partition is provided between two adjacent discharge channels. The partition is provided on the back partition and extends in the discharge direction. A second clearance groove is provided on the partition.

[0010] Furthermore, the regulating component includes a flow regulating element, and the upper template has an installation channel that is connected to the discharge channel. The flow regulating element is movably installed in the installation channel.

[0011] Furthermore, the installation channel extends along the length of the upper template, and multiple adjustment components are arranged side by side along the extension direction of the installation channel.

[0012] Furthermore, the coating die head also includes a lower template, which is located below the middle template. A second partition is provided between the middle template and the lower template, and the second partition is provided with a discharge channel and a discharge port corresponding to the first partition.

[0013] Furthermore, the coating system also includes an unwinding assembly, a back roller assembly, a passing roller assembly, an oven assembly, and a winding assembly, which are arranged in the electrode conveying direction.

[0014] The main function of the monitoring component, applying the technical solution of this utility model, is to monitor the areal density of the slurry on the electrode surface. The monitoring component typically includes a high-precision areal density sensor, capable of continuously and non-contactly measuring the areal density of the coating area. By acquiring areal density data, the monitoring component provides a data foundation for coating control and areal density regulation of the coating system. The host computer is the control center of the system; it receives the areal density monitoring data from the monitoring component, analyzes and processes it, and automatically controls the regulating component to adjust the coating flow rate based on the preset areal density target value and deviation. The regulating component is the actuator for areal density regulation; it extends into the discharge channel of the coating component and adjusts the areal density by changing the size of the discharge port, adjusting the position of the regulating element, or controlling the valve opening. The coating component is responsible for uniformly coating the slurry onto the electrode surface. The coating component includes a discharge channel for conveying the coating from the reservoir to the electrode surface, ensuring a continuous and uniform supply of coating. The coating system provided by this utility model constructs a closed-loop control system through the close cooperation between the monitoring component, the host computer, the adjustment component, and the coating component. This system achieves the effect of monitoring the surface density and quickly adjusting the surface density based on the monitoring results, thereby solving the problem of low efficiency in monitoring and adjusting surface density in existing coating systems. Attached Figure Description

[0015] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 A schematic diagram of the overall structure of the coating system according to an embodiment of the present invention is shown;

[0017] Figure 2 An exploded perspective view of the coating die head of the coating system according to an embodiment of the present invention is shown;

[0018] Figure 3 A top view of the first spacer portion of the coating system according to an embodiment of the present invention is shown;

[0019] Figure 4 Another exploded perspective view of the coating die head of the coating system according to an embodiment of the present invention is shown;

[0020] Figure 5 A schematic diagram of the structure of the Z-shaped support of the coating system according to an embodiment of the present invention is shown;

[0021] Figure 6 This diagram illustrates a coating area partitioning method according to an embodiment of the present invention for controlling areal density.

[0022] Figure 7 This diagram illustrates a coating area partitioning method for a surface density control method according to another embodiment of the present invention.

[0023] Figure 8 A schematic diagram of the partitioning of the flow regulating component in an embodiment of the areal density control method of this utility model is shown;

[0024] Figure 9 A schematic diagram of the control method steps of the areal density control method according to an embodiment of the present invention is shown;

[0025] Figure 10 A schematic diagram illustrating the steps of automatically adjusting the areal density of an embodiment of the areal density control method of the present invention is shown.

[0026] Figure 11 This diagram illustrates the steps of a host computer controlling a flow regulator based on abnormal surface density data in a surface density control method according to an embodiment of the present invention.

[0027] Figure 12 This diagram illustrates the steps of a host computer controlling a flow regulator based on abnormal surface density data in a surface density control method according to another embodiment of the present invention.

[0028] Figure 13 This diagram illustrates the steps of adjusting the unit adjustment stroke of the cross-regional flow regulating component according to the abnormal surface density region in a surface density control method according to an embodiment of the present invention.

[0029] Figure 14 The diagram illustrates the steps of adjusting the unit adjustment stroke of the cross-regional flow regulating component according to the abnormal surface density region in another embodiment of the present invention.

[0030] The above figures include the following reference numerals:

[0031] 11. First surface density monitoring device; 12. Second surface density monitoring device; 2. Host computer; 3. Adjustment component; 311. Drive component; 312. Connector; 32. Flow regulating component; 33. Mounting base; 331. Z-shaped bracket; 332. First horizontal section; 333. Second horizontal section; 41. Discharge channel; 411. Coating area; 412. Thinning area; 431. Upper template; 432. Middle template; 433. Lower template; 434. Installation channel ; 435, First material cavity; 437, Second material cavity; 438, Second spacer; 44, First spacer; 441, Back spacer section; 442, Side spacer section; 443, First clearance groove; 444, Separator section; 445, Second clearance groove; 45, First coating die head; 46, Second coating die head; 5, Unwinding assembly; 6, Back roller assembly; 71, Drive roller; 72, Turning roller assembly; 81, First drying oven; 82, Second drying oven; 9, Rewinding assembly. Detailed Implementation

[0032] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] See also Figures 1 to 14 As shown, this utility model provides a coating system, which includes a monitoring component, a host computer 2, an adjustment component 3, and a coating component 4. The monitoring component and the adjustment component 3 are both communicatively connected to the host computer 2. The monitoring component can monitor the areal density of the slurry on the electrode surface. The coating component 4 includes a discharge channel 41. The adjustment component 3 can extend into the discharge channel 41 to adjust the coating flow rate. The host computer 2 can automatically analyze the areal density monitoring data of the monitoring component and control the adjustment component 3 to adjust the coating flow rate.

[0034] In the above technical solution, the main function of the monitoring component is to monitor the areal density of the slurry on the electrode surface. The monitoring component typically includes a high-precision areal density sensor, capable of continuously and non-contactly measuring the areal density of the coating area. By acquiring areal density data, the monitoring component provides a data foundation for coating control and areal density regulation of the coating system. The host computer 2 is the system's control center. It receives the areal density monitoring data from the monitoring component, analyzes and processes it, and automatically controls the regulating component 3 to adjust the coating flow rate based on the preset areal density target value and deviation. The regulating component 3 is the actuator for areal density regulation. It extends into the discharge channel 41 of the coating component 4 and adjusts the areal density by changing the size of the discharge port, adjusting the position of the regulating element, or controlling the valve opening. The coating component 4 is responsible for uniformly coating the slurry onto the electrode surface. The coating component 4 includes a discharge channel 41 for conveying the coating from the reservoir to the electrode surface, ensuring a continuous and uniform supply of coating. The coating system provided by this utility model constructs a closed-loop control system through the close cooperation between the monitoring component, the host computer 2, the adjustment component 3, and the coating component 4. This system achieves the effect of monitoring the surface density and quickly adjusting the surface density according to the monitoring situation, thereby solving the problem of low efficiency in monitoring and adjusting surface density in existing coating systems.

[0035] In one embodiment of the present invention, the coating component 4 includes a coating die head, which includes an upper template 431 and a middle template 432. The upper template 431 is disposed on the middle template 432. A first interval 44 is provided between the upper template 431 and the middle template 432. At least one discharge channel 41 is provided on the first interval 44. A discharge port is provided on the discharge side of the first interval 44, and the discharge port is connected to the discharge channel 41.

[0036] In the above technical solution, the coating die head is responsible for uniformly coating the slurry from the supply system onto the electrode surface. The coating die head includes an upper template 431 and a middle template 432. After the upper template 431 and the middle template 432 are closed, a channel for accommodating the slurry and supplying the slurry flow is formed inside, thereby controlling the flow direction and velocity of the slurry, reducing turbulence in the slurry flow and interruptions in spraying, and ensuring that the coating is uniformly and stably coated on the electrode. A first spacer 44 is located between the upper template 431 and the middle template 432, and at least one discharge channel 41 provided thereon is connected to the discharge port, thereby guiding the slurry from the discharge channel 41 to the discharge port.

[0037] In one embodiment of this utility model, the adjustment component 3 includes a driving part and a flow regulating component 32. The driving part is disposed on the upper template 431, and the flow regulating component 32 is disposed on the driving end of the driving part. The driving part can drive the flow regulating component 32 to extend into the discharge channel 41 to adjust the paint flow rate. The driving part is communicatively connected to the host computer 2.

[0038] In the above technical solution, the drive unit is the power source of the flow regulating component 32, and typically includes electric, pneumatic, or hydraulic drive devices. The drive unit is mainly used to drive the flow regulating component 32 to perform actions such as extending into or retracting from the discharge channel 41, thereby regulating the paint flow rate. The drive unit is communicatively connected to the host computer 2, enabling the host computer 2 to precisely control the extension or retraction of the flow regulating component 32 into or out of the discharge channel 41 by controlling the start / stop of the drive unit and the magnitude and direction of the driving force, thus ensuring rapid response and precise control to changes in surface density. The flow regulating component 32 is located at the drive end of the drive unit and is connected to the drive end of the drive unit via a connector 312. The flow regulating component 32 can extend into the discharge channel 41. As the flow regulating component 32 extends into the discharge channel 41, the channel for the slurry to flow gradually narrows, and the flow of the slurry in the discharge channel 41 is blocked, thereby reducing the slurry flow rate. When the flow regulating component 32 is withdrawn from the discharge channel 41, the channel for the slurry to flow gradually expands, and the obstruction effect of the flow regulating component 32 on the slurry flow is reduced, thereby increasing the slurry flow rate. By controlling the action of the flow regulating component 32 extending into or withdrawing from the discharge channel 41, the effect of adjusting the slurry flow rate is achieved, thereby enabling the control of the areal density of the slurry coated on the electrode surface.

[0039] In one embodiment of the present invention, the first interval portion 44 includes a back interval section 441 and side interval sections 442 disposed on both sides of the back interval section 441. A first clearance groove 443 is provided on the side interval section 442, and the first clearance groove 443 corresponds to the adjustment component 3.

[0040] In the above technical solution, the back partition 441 is the main body of the first partition 44. Side partitions 442 are provided on both sides of the back partition 441. The side partitions 442 extend along the slurry conveying direction. The back partition 441 and the side partitions 442 together form the sidewall of the discharge channel 41, thereby guiding the flow direction of the slurry. The function of the first clearance groove 443 is to provide clearance space for the adjustment component 3, so as to prevent the adjustment component 3 located above the side partition 442 from colliding with the side partition 442 and causing structural damage when it extends into the discharge channel 41. The first clearance groove 443 can be set as a through groove.

[0041] In one embodiment of the present invention, a plurality of discharge channels 41 are provided on the first interval portion 44. The plurality of discharge channels 41 are arranged side by side at intervals along the length direction of the first interval portion 44. A partition section 444 is provided between two adjacent discharge channels 41. The partition section 444 is provided on the back partition section 441 and extends in the discharge direction. A second clearance groove 445 is provided on the partition section 444.

[0042] In the above technical solution, according to actual production needs, multiple discharge channels 41 can be set on the first interval 44 to achieve the effect of coating multiple electrode sheets at one time. A partition section 444 is set between two adjacent discharge channels 41. The partition section 444 is used to separate the discharge channels 41 to form a blank area between two adjacent coating areas 411. The function of the second clearance groove 445 is to provide clearance space for the adjustment component 3, so as to prevent the adjustment component 3 located above the side interval section 442 from colliding with the side interval section 442 and causing damage to the structure when it extends into the direction of the discharge channel 41. The second clearance groove 445 can be set as a blind groove.

[0043] In one embodiment of this utility model, the adjustment component 3 includes a flow adjustment component 32, and the upper template 431 has an installation channel 434 that is connected to the discharge channel 41. The flow adjustment component 32 is movably disposed in the installation channel 434.

[0044] In the above technical solution, the installation channel 434 is used to accommodate the flow regulating component 32, and provides limits and guidance for the flow regulating component 32 to extend and retract into the discharge channel 41, ensuring that the flow regulating component 32 accurately extends into the discharge channel 41 along the installation channel 434.

[0045] In one embodiment of the present invention, the mounting channel 434 extends along the length direction of the upper template 431, and multiple adjustment components 3 are arranged side by side along the extension direction of the mounting channel 434.

[0046] In the above technical solution, an installation channel 434 is set along the length of the upper template 431, and multiple adjustment components 3 are arranged side by side within the installation channel 434 to achieve independent control of the slurry flow rate at different positions of the discharge channel 41, thereby ensuring uniform thickness and areal density of the coating on the entire electrode surface. Different coating areas may have different requirements for slurry flow rate, especially when there are coating defects or areal density fluctuations, requiring the ability to quickly adjust the local areal density. By arranging multiple adjustment components 3 side by side, the coating die head is provided with the ability to adjust the local areal density, allowing the system to dynamically adjust based on monitoring data to cope with any abnormalities in local flow rate or areal density.

[0047] In one embodiment of the present invention, the coating die head further includes a lower template 433, which is disposed below the middle template 432. A second interval 438 is provided between the middle template 432 and the lower template 433. The second interval 438 is provided with a discharge channel 41 and a discharge port corresponding to the first interval 44.

[0048] In the above technical solution, after the lower mold plate 433 and the middle mold plate 432 are closed, a channel for accommodating and supplying slurry is formed inside, thereby controlling the flow direction and velocity of the slurry, reducing turbulence in the slurry flow and interruptions in spraying, and ensuring that the coating is uniformly and stably coated on the electrode sheet. The second spacer 438 is located between the middle mold plate 432 and the lower mold plate 433, and is provided with a discharge channel 41 and a discharge port corresponding to the first spacer 44, thereby guiding the slurry from the discharge channel 41 and the discharge port to the surface of the electrode sheet.

[0049] In one embodiment of the present invention, the coating system further includes an unwinding assembly 5, a back roller assembly 6, a roller passing assembly, an oven assembly, and a winding assembly 9, wherein the unwinding assembly 5, the back roller assembly 6, the coating assembly 4, the roller passing assembly, the oven assembly, the monitoring assembly, and the winding assembly 9 are arranged in the electrode conveying direction.

[0050] In the above technical solution, the unwinding assembly 5 smoothly releases the electrode substrate from its roll shape into the coating process. The back roller assembly 6 maintains the tension of the electrode substrate through the back roller, preventing wrinkles or displacement of the electrode during coating, thereby improving coating quality. The guide roller assembly drives the electrode to move within the coating system, transferring the electrode between various stages. The oven assembly rapidly dries the coated electrode, solidifying the slurry to form a stable and reliable coating. The rewinding assembly 9 rewinds the coated and dried electrode for easy storage and subsequent processing. Arranging the unwinding assembly 5, back roller assembly 6, coating assembly 4, guide roller assembly, oven assembly, monitoring assembly, and rewinding assembly 9 according to the electrode conveying direction ensures the continuity of the electrode processing flow. The rational configuration and close cooperation of each component guarantee quality control throughout the entire process from substrate unwinding to electrode rewinding, improving production efficiency.

[0051] In one embodiment of the present invention, the coating assembly 4 includes a first coating die 45, which is disposed after the unwinding assembly 5. The first coating die 45 is capable of coating the first surface of the electrode substrate and is communicatively connected to the host computer 2.

[0052] In the above technical solution, the function of the first coating die 45 is to uniformly coat the slurry onto the first surface of the electrode substrate. The first coating die 45 is connected to the host computer 2, so that the host computer 2 can control the adjustment component 3 on the first coating die 45 according to the surface density data of the first surface, thereby realizing the regulation of the surface density of the first surface of the electrode substrate.

[0053] In one embodiment of the present invention, the oven assembly includes a first oven 81, which is disposed after the first coating die head 45. The first oven 81 is capable of drying the first surface of the electrode substrate.

[0054] In the above technical solution, the function of the first oven 81 is to quickly and uniformly dry the slurry coated on the first surface, so that the slurry on the first surface can be cured to form a stable coating structure.

[0055] In one embodiment of this utility model, the monitoring component includes a first areal density monitoring device 11, which is set in the subsequent stage of the first oven 81. The first areal density monitoring device 11 can monitor the areal density of the first surface of the electrode substrate, and the first areal density monitoring device 11 is communicatively connected to the host computer 2.

[0056] In the above technical solution, the first areal density monitoring device 11 is used to monitor the areal density of the coating on the first surface of the electrode substrate and send the areal density data of the coating on the first surface to the host computer 2 as the data basis for areal density control. By placing the first areal density monitoring device 11 after the first oven 81, it is ensured that when the first areal density monitoring device 11 monitors the areal density of the first surface of the electrode substrate, the first surface of the electrode substrate has already undergone the coating and drying process. This results in more accurate and reliable areal density data for the first surface, thereby improving the accuracy of areal density control.

[0057] In one embodiment of the present invention, the roller assembly includes a drive roller 71, which can drive the electrode sheet, and at least two drive rollers 71 are combined to form a flipping roller group 72, which can flip the electrode sheet substrate.

[0058] In the above technical solution, the main function of the drive roller 71 is to pull the electrode sheet forward through friction, ensuring that the electrode sheet is continuously and smoothly transported within the coating system. The flipping roller group 72 is composed of at least two drive rollers 71. The function of the flipping roller group 72 is to flip the electrode sheet during the coating process, so that the uncoated side of the electrode sheet faces the coating direction of the coating die head, thereby coating the second surface. By setting up the flipping roller group 72, uniform coating on both sides of the electrode sheet is achieved, while reducing misalignment and damage to the electrode sheet during the flipping process, ensuring the continuity and efficiency of the coating process.

[0059] In one embodiment of this utility model, the coating assembly 4 includes a second coating die 46, which is disposed after the flipping roller assembly 72. The second coating die 46 is capable of coating the second surface of the electrode substrate, and the second coating die 46 is communicatively connected to the host computer 2.

[0060] In the above technical solution, the second coating die 46 is used to coat the second surface of the electrode substrate. The first coating die 45 and the second coating die 46 work together to achieve double-sided coating. The second coating die 46 is communicatively connected to the host computer 2, enabling the host computer 2 to control the adjustment component 3 on the second coating die 46 based on the areal density data of the second surface, thereby achieving regulation of the areal density of the second surface of the electrode substrate.

[0061] In one embodiment of the present invention, the oven assembly includes a second oven 82, which is disposed after the second coating die head 46. The second oven 82 is capable of drying the second surface of the electrode substrate.

[0062] In the above technical solution, the function of the second oven 82 is to quickly and uniformly dry the slurry coated on the second surface, so that the slurry on the second surface can be cured to form a stable coating structure.

[0063] In one embodiment of this utility model, the areal density monitoring device includes a second areal density monitoring device 12, which is set in the subsequent stage of the second oven 82. The second areal density monitoring device 12 can monitor the areal density of the second surface of the electrode substrate, and the second areal density monitoring device 12 is communicatively connected to the host computer 2.

[0064] In the above technical solution, the second areal density monitoring device 12 is used to monitor the areal density of the coating on the second surface of the electrode substrate and send the areal density data of the coating on the second surface to the host computer 2 as the data basis for the control of the areal density of the second surface. By placing the second areal density monitoring device 12 after the second oven 82, it is ensured that when the second areal density monitoring device 12 monitors the areal density of the second surface of the electrode substrate, the second surface of the electrode substrate has already undergone the coating and drying process. This results in more accurate and reliable areal density data, thereby improving the accuracy of areal density control.

[0065] In one embodiment of this utility model, the winding assembly 9 is set in the last stage of the coating process, and the winding assembly 9 can wind up and support the coated electrode sheet.

[0066] In the above technical solution, the winding assembly 9 is set at the last stage of the coating process, which ensures that the coated electrode sheet can be safely and orderly collected into a roll, while maintaining the integrity of its structure and avoiding damage.

[0067] In one embodiment of this utility model, the adjusting component 3 further includes a mounting base 33, which is disposed on the upper template 431. The driving part includes a driving component 311, which is mounted on the mounting base 33. The driving end of the driving component 311 is provided with a coupling. The first end of the coupling is connected to the output shaft of the driving component 311, and the second end of the coupling is fixedly connected to a sleeve. The sleeve is threadedly connected to the flow regulating component 32. The driving component 311 can drive the flow regulating component 32 to move along the installation channel 434 within the installation channel 434.

[0068] In the above technical solution, the mounting base 33 is mainly used to fix the driving component 311 and to support the driving component 311 and other components connected to it, such as the coupling, sleeve, and flow regulating component 32, thereby improving the stability and accuracy of the flow regulating component 32 driven by the driving component 311. The driving component 311 is mainly used to drive the flow regulating component 32 to move, realizing the action of extending into and retracting from the discharge channel 41. The coupling and sleeve are mainly used to connect the flow regulating component 32 to the output end of the driving component 311 and to transmit the driving force of the driving component 311 to the flow regulating component 32.

[0069] In one embodiment of this utility model, the mounting base 33 is a Z-shaped bracket 331. The Z-shaped bracket 331 includes a first horizontal segment 332 and a second horizontal segment 333. The first horizontal segment 332 is disposed on the upper surface of the upper template 431, and the second horizontal segment 333 is disposed directly above the mounting channel 434. The driving part is mounted on the second horizontal segment 333.

[0070] In the above technical solution, the Z-shaped bracket 331 provides a stable mounting platform for the drive unit and the flow regulating component. The first horizontal section 332 is set on the upper surface of the upper template 431 to ensure that the position of the Z-shaped bracket 331 remains stable during the coating process. The function of the second horizontal section 333 is to provide a mounting position for the drive unit, so that the drive unit is suspended above the mounting channel 434, ensuring that the drive unit can accurately control the vertical movement of the flow regulating component 32, thereby achieving precise control of the slurry flow rate and areal density.

[0071] In one embodiment of the present invention, a first material cavity 435 is provided on the middle template 432, a material supply channel is provided in the first material cavity 435, the material supply channel is connected to an external material source, and the first material cavity 435 is connected to the discharge channel 41.

[0072] In the above technical solution, the first material chamber 435 is mainly used for storing and distributing slurry, and the feeding channel is used to connect the external material source with the first material chamber 435, ensuring that the slurry can be smoothly and continuously delivered into the first material chamber 435 on the middle template 432. The first material chamber 435 can evenly distribute the slurry input from the outside into the coating die head to multiple discharge channels 41, ensuring that the slurry thickness on the electrode surface coating area corresponding to the multiple discharge channels 41 remains uniform, avoiding localized excessively thick or thin coating areas on the electrode surface due to uneven slurry distribution. Simultaneously, the first material chamber 435 can also buffer the slurry flow, reducing pressure fluctuations during the slurry's transmission from the external material source to the discharge channel, helping to maintain a stable slurry flow rate in the discharge channel.

[0073] In one embodiment of this utility model, a second material cavity 437 is provided on the lower template 433, and a material supply channel is provided inside the second material cavity 437, which is connected to an external material source.

[0074] In the above technical solution, the second material chamber 437 is mainly used for storing and distributing slurry, and the feeding channel is used to connect the external material source with the second material chamber 437 to ensure that the slurry can be smoothly and continuously transported into the second material chamber 437 on the lower template 433. At the same time, the second material chamber 437 can buffer the slurry flow, reduce the pressure fluctuation of the slurry during the transmission process from the external material source to the discharge channel, and help maintain the stability of the slurry flow in the discharge channel.

[0075] See also Figures 1 to 14 As shown, this utility model also provides a method for controlling surface density. This method controls the surface density based on the above-mentioned coating system, including: starting the coating system; monitoring the surface density of the slurry on the electrode surface; and automatically controlling the surface density.

[0076] In the above technical solution, after the coating system is started, the slurry is conveyed from the feeding device to the electrode surface through the coating die for coating. After drying and other processes, the electrode is formed. During this process, the monitoring component is also activated to monitor the surface density of the coating on the electrode surface. The monitoring component monitors the surface density of the first and second surfaces of the coated electrode, and then automatically adjusts the surface density based on the monitored surface density to ensure that the surface density of the slurry on the electrode surface is always within the qualified range. Based on the above coating system, by implementing monitoring and automatic adjustment steps, the efficiency of surface density detection and control is improved compared to existing technologies, avoiding downtime for manual surface density detection and control, thereby greatly improving production efficiency and electrode product quality.

[0077] In one embodiment of this utility model, the step of monitoring the areal density of the slurry on the electrode surface includes: the monitoring component acquiring the areal density data of the slurry on the electrode surface; and the monitoring component sending the areal density data to the host computer.

[0078] In the above technical solution, the areal density data of the slurry on the electrode surface is obtained by a monitoring component. The monitoring component includes a first areal density monitoring device 11 and a second areal density monitoring device 12. The first areal density monitoring device 11 can monitor the areal density of the first surface of the electrode, and the second areal density monitoring device 12 can monitor the areal density of the second surface of the electrode. The first areal density monitoring device 11 and the second areal density monitoring device 12 send the monitored areal density data to the host computer as the data basis for the host computer to automatically adjust the areal density of the first and second surfaces.

[0079] In one embodiment of this utility model, the step of automatically adjusting the areal density includes: the host computer comparing the electrode areal density data with a preset acceptable areal density range to determine whether it is abnormal areal density data; if the electrode areal density data exceeds the preset acceptable areal density range, then the electrode areal density data is abnormal; the host computer controls the flow regulator based on the abnormal areal density data; the host computer returns to the step of comparing the electrode areal density data with the preset acceptable areal density range to determine whether it is abnormal areal density data; if the electrode areal density data does not exceed the preset acceptable areal density range, then the electrode areal density data is normal; the host computer returns to the step of comparing the electrode areal density data with the preset acceptable areal density range to determine whether it is abnormal areal density data.

[0080] In the above technical solution, the host computer, as the control core of the entire closed-loop system, needs to continuously monitor the data transmitted from the areal density monitoring device. A preset acceptable range is input to the host computer as a benchmark for judging whether the areal density data is abnormal. By comparing the collected areal density data with the preset acceptable range, it determines whether the areal density is abnormal, the area of ​​the abnormality, and the deviation of the abnormal areal density from the acceptable range, thus deciding whether adjustment is needed, the object of adjustment, and the magnitude of the adjustment. The host computer first compares the electrode areal density data uploaded by the monitoring component with the preset acceptable areal density range to determine whether the electrode areal density data is abnormal. If the electrode areal density data exceeds the preset acceptable range, it is considered abnormal, indicating that the surface quality of the coating area corresponding to the electrode areal density data does not meet the acceptable range, and the slurry flow rate in this area needs to be adjusted to ensure that the areal density of the coating area returns to the acceptable range. After determining the abnormal areal density data, the host computer adjusts the slurry flow rate in this area based on the abnormal areal density data. After adjusting the flow rate of the regulating component within the designated area, the slurry flow rate changes, causing a corresponding change in the areal density and the areal density data monitored by the monitoring components. The process then returns to the host computer to compare the electrode areal density data with the preset acceptable range to determine if it is abnormal. The changed areal density data is compared to determine if the density has not yet reached the acceptable range after adjustment, and whether further adjustment is needed. This process is repeated until the areal density of the abnormal area returns to the acceptable range.

[0081] If the host computer compares the electrode surface density data with the preset acceptable surface density range and finds that the electrode surface density data does not exceed the preset acceptable surface density range, it indicates that the surface density in this area is normal and no adjustment is required. Then, the host computer returns to the step of comparing the electrode surface density data with the preset acceptable surface density range to determine whether it is abnormal surface density data, and the surface density is continuously monitored.

[0082] In one embodiment of this utility model, the step of the host computer controlling the flow regulator based on abnormal surface density data includes: the host computer determining the corresponding abnormal coating area based on the abnormal surface density data; the host computer determining the flow regulator located within the abnormal coating area based on the abnormal coating area; the host computer comparing the abnormal surface density data with the median of a preset acceptable surface density range; when the abnormal surface density data is greater than the median of the preset acceptable surface density range, the host computer controls the flow regulator within the abnormal coating area to move towards the discharge channel; when the abnormal surface density data is equal to the median of the preset acceptable surface density range, the host computer controls the flow regulator within the abnormal coating area to maintain its current position; when the abnormal surface density data is less than the median of the preset acceptable surface density range, the host computer controls the flow regulator within the abnormal coating area to move away from the discharge channel.

[0083] In the above technical solution, after determining the abnormal areal density data, the host computer identifies the corresponding abnormal coating area based on this data and retrieves which flow regulators are located within that area, thereby controlling the flow regulators within that area. The host computer compares the abnormal areal density data with the median of the preset acceptable areal density range to determine the specific movement direction of the flow regulators. When the abnormal areal density data is greater than the median of the preset acceptable areal density range, it indicates that there is too much coating material in the abnormal coating area, and the areal density needs to be reduced by decreasing the paint flow rate in this area. Therefore, the host computer controls the flow regulators in the abnormal coating area to move towards the discharge channel, allowing the flow regulators to extend into the discharge channel, reducing the size of the paint flow channel, thereby reducing the paint flow rate and achieving the effect of reducing areal density. When the host computer compares the areal density of the abnormal coating area with the median of the preset acceptable areal density range and finds that the areal density data equals the median of the preset acceptable areal density range, the areal density of the abnormal coating area no longer needs adjustment. In this case, the host computer controls the flow regulators in the abnormal coating area to maintain their current positions. When the abnormal areal density data is less than the median value of the preset areal density acceptable range, it indicates that there is too little coating material in the abnormal coating area. It is necessary to increase the coating flow rate in this area to improve the areal density. Therefore, the upper computer controls the flow regulating component in the abnormal coating area to move away from the discharge channel, so that the flow regulating component is withdrawn from the discharge channel, increasing the size of the coating flow channel, thereby increasing the coating flow rate and thus achieving the effect of improving the areal density.

[0084] In one embodiment of this utility model, before the step of automatically adjusting the surface density, the method further includes: dividing the coating area into zones; dividing the flow regulating component into zones according to the zoning of the coating area; and setting the adjustment priority of the flow regulating component.

[0085] In the above technical solution, the coating area is divided into zones before the automatic adjustment of the areal density. Then, the flow regulator is divided into zones according to the zoning of the coating area. By dividing the coating area and the flow regulator, the host computer can adjust the areal density of the abnormal coating area by controlling some of the flow regulators in the abnormal coating area after identifying the abnormal coating area. This achieves fine flow regulation and improves the efficiency and accuracy of areal density control.

[0086] When adjusting the slurry flow rate in the discharge channel using a flow regulator, the slurry's fluidity causes it to flow to other areas when some areas are being regulated, resulting in fluctuations in the areal density of those areas. For example, when the flow regulator located in the center of the discharge channel extends into the channel, the slurry in the center will flow to the sides, increasing the coating thickness in the sides. Therefore, setting a priority for the flow regulator ensures that the system prioritizes regulating areas with a greater impact on areal density, thereby improving the overall areal density regulation efficiency.

[0087] In one embodiment of this utility model, the step of dividing the coating area includes: dividing the discharge channel into a main coating area and a thinning area, defining the main coating area as area A and the thinning area as area B; dividing the area where the side gap is located into a blank area, defining the blank area as area C; defining the critical area between the main coating area and the thinning area as area AB; and defining the critical area between the thinning area and the blank area as area BC.

[0088] In the above technical solution, since the slurry diffuses from the center of the coating area to both sides during the coating process, a coating area 411 is set in the middle of the discharge channel and a thinning area 412 is set on both sides of the coating area 411. This makes the coating on the surface of the coated electrode sheet thicker in the middle and thinner at both sides, ensuring the neatness of the coated electrode sheet when it is wound up. The coating area 411 is defined as area A, and the thinning area 412 is defined as area B; the area where the side gap is located is divided into a blank area and defined as area C; the critical area between the coating area 411 and the thinning area 412 is defined as area AB; the critical area between the thinning area 412 and the blank area is defined as area BC. This facilitates the subsequent partitioning of the flow regulating components in each area. Through the above partitioning, the host computer can accurately locate the abnormal surface density area.

[0089] In one embodiment of this utility model, the step of dividing the flow regulating component according to the coating area partitioning includes: defining the flow regulating component above area A as flow regulating component A; defining the flow regulating component above area B as flow regulating component B; defining the flow regulating component above area C as flow regulating component C; defining the flow regulating component above area AB as flow regulating component AB; and defining the flow regulating component above area BC as flow regulating component BC.

[0090] In the above technical solutions, the adjustment components typically need to achieve areal density control in different areas, such as the main coating area and the thinning area. Since the acceptable areal density range may differ for each area, a flow regulator is set up in each area to individually adjust the slurry flow rate, thereby achieving independent areal density control in each area and improving the coating area control efficiency and areal density quality. In one embodiment of this utility model, the step of partitioning the flow regulator according to the coating area partitioning includes: defining the flow regulator above area A as flow regulator A, and defining multiple flow regulators A within area A as flow regulators A1, A2, ..., An, where n>≥1;

[0091] The flow regulator above area B is defined as flow regulator B, and the multiple flow regulators B in area B are defined as flow regulators B1, B2, ..., Bn, where n>1.

[0092] The flow regulator above area C is defined as flow regulator C, and the multiple flow regulators C in area C are defined as flow regulators C1, C2, ..., Cn, where n>1;

[0093] The flow regulator above the AB zone is defined as flow regulator AB, and the multiple flow regulators AB within the AB zone are defined as flow regulators AB1, AB2, ..., ABn, where n>1;

[0094] The flow regulator above the BC zone is defined as flow regulator BC, and the multiple flow regulators BC within the BC zone are defined as flow regulators BC1, BC2, ..., BCn, where n>1.

[0095] In the above technical solution, the regulating component typically needs to control the areal density in different areas, such as the main coating area and the thinning area. The acceptable range of areal density may differ for each area, therefore multiple flow regulating components are set in different coating areas. To ensure that the areal density of each area can be adjusted independently and accurately, the multiple flow regulating components located above each area need to be clearly defined. The flow regulating component above area A is defined as flow regulating component A, and the multiple flow regulating components A within area A are defined as flow regulating components A1, A2, ..., An, n>1; the flow regulating component above area B is defined as flow regulating component B, and the multiple flow regulating components B within area B are defined as flow regulating components B1, B2, ..., Bn, n>1; the flow regulating component above area C is defined as flow regulating component C, and the multiple flow regulating components C within area C are defined as flow regulating components C1, C2, ..., Cn, n>1; the flow regulating component above area AB is defined as flow regulating component A. In area B, multiple flow regulators AB within zone AB are defined as flow regulators AB1, AB2, ..., ABn, where n>1. The flow regulator above zone BC is defined as flow regulator BC, and multiple flow regulators BC within zone BC are defined as flow regulators BC1, BC2, ..., BCn, where n>1. When regulating the areal density in areas of abnormal areal density, the above numbering is used to precisely map each individual flow regulator within that area, enabling refined control of individual flow regulators and further improving the accuracy of areal density regulation. Furthermore, the independent numbering of each regulator helps in quickly locating faults, simplifying maintenance and troubleshooting processes, and improving system maintenance efficiency and reliability.

[0096] In one embodiment of this utility model, the step of setting the adjustment priority of the flow regulator includes: inputting a preset flow regulator adjustment priority as A>AB>B>BC>C.

[0097] In the above technical solution, due to the fluidity of the slurry, when the A area is controlled, the slurry will flow to both sides of the A area, causing fluctuations in the areal density of other areas. Similarly, when the AB area is controlled, the slurry will continue to move outward until it flows to the C area. Therefore, by adjusting the areal density step by step from the A area as the center, excessive reaction of the areal density during the control process can be avoided, unnecessary slurry waste and equipment wear can be reduced, and the key areas with greater impact on the areal density can be treated first according to priority, so as to stabilize the areal density more quickly, improve the control efficiency and product qualification rate.

[0098] In one embodiment of this utility model, the step of the host computer regulating the flow regulator based on abnormal surface density data includes: the host computer determining the corresponding abnormal coating area based on the abnormal surface density data; determining the priority regulation area based on the abnormal coating area situation; when the number of abnormal coating areas > 1, determining the priority regulation area according to the preset flow regulator regulation priority, i.e., A>AB>B>BC>C; the host computer comparing the surface density data of the priority regulation area with the median of the preset surface density acceptable range; when the surface density data of the priority regulation area is greater than the median of the preset surface density acceptable range, the host computer controls the flow regulator in the priority regulation area to move towards the discharge channel; when the surface density data of the priority regulation area is equal to the median of the preset surface density acceptable range, the host computer controls the flow regulator in the priority regulation area to maintain its current position; when the surface density data of the priority regulation area is less than the median of the preset surface density acceptable range, the host computer controls the flow regulator in the priority regulation area to maintain its current position. The flow regulators within the priority control area move away from the discharge channel; the process returns to the step of determining the priority control area according to the preset flow regulator adjustment priority, i.e., A>AB>B>BC>C, when the number of abnormal coating areas is greater than 1; when the number of abnormal coating areas is 1, the abnormal coating area is determined as the priority control area; the host computer compares the areal density data of the priority control area with the median of the preset areal density acceptable range; when the areal density data of the priority control area is greater than the median of the preset areal density acceptable range, the host computer controls the flow regulators within the priority control area to move closer to the discharge channel; when the areal density data of the priority control area is equal to the median of the preset areal density acceptable range, the host computer controls the flow regulators within the priority control area to maintain their current position; when the areal density data of the priority control area is less than the median of the preset areal density acceptable range, the host computer controls the flow regulators within the priority control area to move away from the discharge channel.

[0099] In the above technical solution, the host computer determines the corresponding abnormal coating area based on the abnormal surface density data, and then determines the priority control area based on the situation of the abnormal coating area. If the number of abnormal coating areas is greater than 1, the priority control area is determined according to the priority order A>AB>B>BC>C. After the control of a priority control area is completed, the system returns to the step of determining the priority control area according to the adjustment priority, so as to determine the next priority control area according to the priority and control it. For example, if both areas A and B have abnormal areal density, then area A is determined as the priority control area according to the priority order. Therefore, areal density control is performed on area A first. During the control process of area A, the slurry in area A will flow to both sides of the discharge channel. After the control of area A is completed, the process returns to the step of determining the priority control area according to the priority, thus determining area AB as the next priority control area. The above steps are repeated to control areas AB, B, BC, and C in turn, ensuring that the areal density of each area is within the qualified range. For another example, if areas B and C have abnormal areal density, then area B is controlled first according to the priority order. During the control process of area B, the slurry in area B will flow to both sides of the discharge channel. Then the above steps are repeated to control areas BC and C in turn.

[0100] When the abnormal coating area is equal to 1, it indicates that there is only one abnormal coating area. There is no need to determine the priority control area according to the preset flow regulator adjustment priority. The areal density can be controlled directly by controlling the flow regulator in the abnormal coating area.

[0101] In one embodiment of this utility model, before the step of automatically regulating the areal density, the method further includes: setting the adjustable stroke range of the flow regulator; and adjusting the unit adjustment stroke of the cross-regional flow regulator according to the situation of abnormal areal density areas.

[0102] In the above technical solution, before the step of automatically controlling the areal density, the adjustable stroke range of the flow regulator is set, limiting the limit of the flow regulator's extension into the discharge channel. This prevents the flow regulator from extending too deeply and colliding with the first spacer or other structures such as the middle template, causing damage to the coating die or failure of the flow regulation function. When controlling the flow regulator to adjust the slurry flow corresponding to the areal density abnormal area, there may be a situation where one flow regulator is located at the boundary of two adjacent control areas. In this case, the flow regulator is called a cross-zone flow regulator. At least a part of the cross-zone flow regulator is located in the areal density abnormal area. When adjusting the position of the cross-zone flow regulator in the discharge channel for the areal density abnormal area, the position of the cross-zone flow regulator in another coating area is also changed, thus affecting the flow in that coating area. To prevent the cross-area flow regulator from drastically affecting the flow rate of another coating area when adjusting the flow rate in an area with abnormal areal density, it is necessary to adjust the unit adjustment stroke of the cross-area flow regulator according to the situation of the abnormal areal density area. This ensures that when the cross-area flow regulator adjusts its position according to the unit adjustment stroke, it can effectively control the areal density in the area with abnormal areal density without causing drastic fluctuations in the areal density of another coating area, thus preventing abnormal areal density.

[0103] In one embodiment of this utility model, the step of setting the adjustable stroke range of the flow regulator includes: setting the maximum adjustment stroke of flow regulator A to X mm, and the maximum adjustment stroke of flow regulators AB and B to Y mm, then: Y = (2 - standard value of surface density of thinned area / standard value of surface density of normal coating area) * X; the maximum adjustment stroke of flow regulators BC and C to Z mm, and the standard thickness of thinned area to b mm, then: Z = Y + b.

[0104] In the above technical solution, the standard values ​​of the surface density of the thinned area and the normal coating area are determined according to empirical formulas or actual process requirements. Based on these standard surface density values, the maximum adjustment stroke of flow regulator A in area A, flow regulator AB in area AB, and flow regulator B in area B are determined using the formula "Y = (2 - standard value of surface density of thinned area / standard value of surface density of normal coating area) * X". The maximum adjustment strokes of flow regulators A, AB, and B obtained according to this formula ensure that the flow regulators in these areas operate within a small stroke range when adjusting the surface density, thereby enabling more precise control of the slurry coating amount and avoiding drastic changes in surface density due to excessive adjustment stroke. Zones BC and C are thinning zones, which typically require thinner slurry layers. When the areal density of zones A, AB, and B is controlled, the slurry in these three zones is compressed and gradually flows towards zones BC and C, resulting in thinner slurry layers in zones BC and C. Therefore, the maximum adjustment stroke of flow regulators BC and C, determined by the formula "Z = Y + b", ensures that flow regulators BC and C have a larger flow adjustment range than flow regulators A, AB, and B, thereby enabling the thinning of the slurry layer in zones BC and C.

[0105] In one embodiment of this utility model, the step of adjusting the unit adjustment stroke of the cross-zone flow regulating component according to the abnormal surface density region includes: setting the dividing line between zone A and zone B as K. AB K AB Line, then K AB The flow regulator corresponding to the line is flow regulator AB; K AB The line divides the flow regulator AB into two parts. Let the area of ​​the side closer to the flow regulator A be S. A S A The area on the side closest to the flow regulator B is S. B1 S B1 ;when At this time, the primary adjustment area of ​​the flow regulator AB is area A, and the secondary adjustment area is area B. It is determined whether area A or area B is an abnormal surface density area. If area A is an abnormal surface density area, the process returns to the step of determining the priority control area based on the abnormal coating area situation. If area B is an abnormal surface density area, the default unit adjustment stroke of the flow regulator AB is adjusted according to the weight ratio. Here, the default unit adjustment stroke of the flow regulator AB is H, the adjusted unit adjustment stroke is H1, and the weight ratio is... but when At this time, the primary adjustment area of ​​the flow regulator AB is region B, and the secondary adjustment area is region A. It is determined whether region A or region B is an abnormal surface density region. If region B is an abnormal surface density region, the process returns to the step of determining the priority control region based on the abnormal coating area situation. If region A is an abnormal surface density region, the default unit adjustment stroke of the flow regulator AB is adjusted according to the weight ratio. Here, the default unit adjustment stroke of the flow regulator AB is H, the adjusted unit adjustment stroke is H2, and the weight ratio is... but when Then, return to the step of determining the priority control area based on the situation of abnormal coating areas.

[0106] In the above technical solution, the dividing line between area A and area B is K. AB K AB Line, K AB A line divides the flow regulator AB into two parts, such that part of the flow regulator AB is in region A and the other part is in region B. Let the area of ​​the flow regulator AB in region A be S. A S A The area of ​​region B is S. B1 When coating to form electrodes of different specifications, the area of ​​the flow regulator AB in region A and region B will change, which is achieved through S. A With S B1 The ratio of their areas determines the main regulating area of ​​the flow regulator AB.

[0107] when When the displacement of the flow regulator AB has a greater impact on the surface density of area A than on the surface density of area B, the primary adjustment area is area A, and the secondary adjustment area is area B. Then, it is determined whether area A or area B is an abnormal surface density area. If area A is an abnormal surface density area, since area A is the primary adjustment area of ​​the flow regulator AB, the process returns to the step of determining the priority control area based on the abnormal coating area situation, and the abnormal surface density area is controlled according to the control priority. If area B is an abnormal surface density area, when adjusting the position of the flow regulator AB to control the surface density of area B, the change in the position of the flow regulator AB will have a significant impact on the surface density of area A. To avoid causing abnormal surface density in area A after adjusting the surface density of area B to the acceptable range using the flow regulator AB, it is necessary to adjust the unit adjustment stroke of the flow regulator AB according to the area of ​​the flow regulator AB in areas A and B. Therefore, let the default unit adjustment stroke of the flow regulator AB be H, the adjusted unit adjustment stroke be H1, and the weighting ratio be... The unit adjustment stroke of the flow regulator AB after adjustment is then obtained. When the flow regulating component AB moves according to the adjusted unit adjustment stroke, it can regulate the surface density of area B without having an excessive impact on the surface density of area A.

[0108] Similarly, when At this time, the primary adjustment area of ​​the flow regulator AB is area B, and the secondary adjustment area is area A. It is determined whether area A or B is an abnormal surface density area. If area B is an abnormal surface density area, the process returns to the step of determining the priority control area based on the abnormal coating area situation. If area A is an abnormal surface density area, the default unit adjustment stroke of the flow regulator AB is adjusted according to the weight ratio. Here, the default unit adjustment stroke of the flow regulator AB is H, the adjusted unit adjustment stroke is H2, and the weight ratio is... The unit adjustment stroke of the flow regulator AB after adjustment is then obtained.

[0109]

[0110] when This indicates that the flow regulator AB has the same effect on the areal density of areas A and B, without distinguishing between the primary and secondary affected areas. Therefore, we should return to the step of determining the priority control area based on the abnormal coating area situation, and then control the abnormal areal density area according to the control priority.

[0111] In one embodiment of this utility model, the step of adjusting the unit adjustment stroke of the cross-zone flow regulating component according to the abnormal surface density region includes: setting the dividing line between zone B and zone C as K. AB K BC Line, then K BC The flow regulator corresponding to the line is flow regulator BC; K BC The line divides the flow regulator BC into two parts. Let the area of ​​the side closer to the flow regulator B be S. B2 S A The area on the side closest to the flow regulator C is S. C S B1 ;when At this time, the primary adjustment area of ​​the flow regulator BC is region B, and the secondary adjustment area is region C. It is determined whether region B or region C is an abnormal surface density region. If region B is an abnormal surface density region, the process returns to the step of determining the priority control region based on the abnormal coating area situation. If region C is an abnormal surface density region, the default unit adjustment stroke of the flow regulator BC is adjusted according to the weight ratio. Here, the default unit adjustment stroke of the flow regulator BC is set to H, the adjusted unit adjustment stroke is H3, and the weight ratio is... but when At this time, the primary adjustment area of ​​the flow regulator BC is region C, and the secondary adjustment area is region B. It is determined whether region B or region C is an abnormal surface density region. If region C is an abnormal surface density region, the process returns to the step of determining the priority control region based on the abnormal coating area situation. If region B is an abnormal surface density region, the default unit adjustment stroke of the flow regulator BC is adjusted according to the weight ratio. Here, the default unit adjustment stroke of the flow regulator BC is set to H, the adjusted unit adjustment stroke is H4, and the weight ratio is... but

[0112] In the above technical solution, the dividing line between area B and area C is K. AB K BC Line, K BC The line divides the flow regulator BC into two parts, such that one part of the flow regulator BC is in region B and the other part is in region C. Let the area of ​​the flow regulator BC in region B be S. B2 S A The area within region C is S. C When coating to form electrodes of different specifications, the area of ​​the flow regulator BC in regions B and C will change, which is achieved through S. B2 With S C The ratio of their areas determines the main regulating area of ​​the flow regulator BC.

[0113] when When the displacement of the flow regulator BC has a greater impact on the surface density of area B than on the surface density of area C, the primary adjustment area is area B, and the secondary adjustment area is area C. Then, it is determined whether area B or area C is an abnormal surface density area. If area B is an abnormal surface density area, since area B is the primary adjustment area for the flow regulator BC, the process returns to the step of determining the priority control area based on the abnormal coating area situation, and the abnormal surface density area is controlled according to the control priority. If area C is an abnormal surface density area, when adjusting the position of the flow regulator BC to control the surface density of area C, the change in the position of the flow regulator BC will have a significant impact on the surface density of area B. To avoid causing abnormal surface density in area B after adjusting the surface density of area C to the acceptable range using the flow regulator BC, it is necessary to adjust the unit adjustment stroke of the flow regulator BC according to the area of ​​the flow regulator BC in areas B and C. Therefore, let the default unit adjustment stroke of the flow regulator BC be H, and the adjusted unit adjustment stroke be H3, with a weighting ratio of... The unit adjustment stroke of the flow regulator BC after adjustment is then obtained. When the flow regulating component BC moves according to the adjusted unit adjustment stroke, it can regulate the surface density of area C without having an excessive impact on the surface density of area B.

[0114] Similarly, when At this time, the primary adjustment area of ​​the flow regulator BC is region C, and the secondary adjustment area is region B. It is determined whether region B or region C is an abnormal surface density region. If region C is an abnormal surface density region, the process returns to the step of determining the priority control region based on the abnormal coating area situation. If region B is an abnormal surface density region, the default unit adjustment stroke of the flow regulator BC is adjusted according to the weight ratio. Here, the default unit adjustment stroke of the flow regulator BC is set to H, the adjusted unit adjustment stroke is H4, and the weight ratio is... The unit adjustment stroke of the flow regulator BC after adjustment is then obtained.

[0115]

[0116] when This indicates that the flow regulator BC has the same effect on the areal density of areas B and C, without distinguishing between the primary and secondary affected areas. Therefore, we should return to the step of determining the priority control area based on the abnormal coating area situation, and then control the abnormal areal density area according to the control priority.

[0117] In one embodiment of this invention, before the step of monitoring the areal density of the slurry on the electrode surface, the areal density is further included by manually adjusting the areal density.

[0118] In the above technical solution, after the coating system is turned on, the surface density is first coarsely adjusted by manual control so that the surface density of the first surface and the surface density of the second surface are mostly within the qualified range. This ensures that the automatic adjustment system does not need to make large corrections to the parameters when it intervenes, and can focus more on fine adjustment and precise control, thereby improving the accuracy and stability of surface density adjustment.

[0119] In one embodiment of this utility model, the step of manually adjusting the surface density includes: manually adjusting the distance between the coating die head and the back roller; the monitoring component acquiring electrode surface density data and uploading it to the host computer; the host computer comparing the electrode surface density data with a preset surface density acceptable range; when no less than a preset number of electrode surface density data are within the preset surface density acceptable range, the manual adjustment of surface density is completed; when less than a preset number of electrode surface density data are within the preset surface density acceptable range, the process returns to the step of manually adjusting the distance between the die head and the back roller.

[0120] In the above technical solution, the surface density is manually coarsely adjusted by manually adjusting the distance between the coating die and the back roller. At this time, the monitoring component acquires the electrode surface density data and uploads it to the host computer. The host computer compares the electrode surface density data with the preset surface density acceptable range to determine whether there are enough surface density data within the preset surface density acceptable range. When no less than a preset number of electrode surface density data are within the preset surface density acceptable range, the manual adjustment of surface density is completed. The preset number can be a specified number of electrode surface density data, or it can be the proportion of electrode surface density data within the preset surface density acceptable range to the total number of electrode surface density data. In this embodiment, the preset number can be any value between 60% and 90%. When less than a preset number of electrode surface density data are within the preset surface density acceptable range, it indicates that the requirements for automatic adjustment by the control system have not been met. Therefore, the process returns to the step of manually adjusting the distance between the die and the back roller to continue the manual coarse adjustment of surface density.

[0121] In one embodiment of this utility model, before the step of dividing the coating area into zones, the method further includes: determining the number and / or size data of the coating areas and uploading them to a host computer.

[0122] In the above scheme, depending on the different requirements of electrode coating, the number and size of the coating areas set on the first interval may change. Before dividing the coating areas, it is necessary to determine the number of coating areas and input it into the host computer. The host computer can determine how many flow regulators are needed to adjust the slurry flow rate in the coating area based on the number and / or size data of the coating areas.

[0123] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: The main function of the monitoring component is to monitor the areal density of the slurry on the electrode surface. The monitoring component typically includes a high-precision areal density detection sensor, which can continuously and non-contactly measure the areal density of the coating area. By acquiring areal density data, the monitoring component provides a data basis for the coating control and areal density regulation of the coating system. The host computer 2 is the control center of the system. It receives the areal density monitoring data from the monitoring component, analyzes and processes it, and automatically controls the regulating component 3 to adjust the paint flow rate according to the preset areal density target value and deviation. The regulating component 3 is the actuator for areal density regulation. The regulating component 3 can extend into the discharge channel 41 of the coating component 4 and adjust the areal density by changing the size of the discharge port, adjusting the position of the regulating element, or controlling the valve opening. The coating component 4 is responsible for uniformly coating the slurry on the electrode surface. The coating component 4 includes a discharge channel 41 for conveying the paint from the reservoir to the electrode surface, ensuring a continuous and uniform supply of paint. The coating system provided by this utility model constructs a closed-loop control system through the close cooperation between the monitoring component, the host computer 2, the adjustment component 3, and the coating component 4. This system achieves the effect of monitoring the surface density and quickly adjusting the surface density according to the monitoring situation, thereby solving the problem of low efficiency in monitoring and adjusting surface density in existing coating systems.

[0124] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0125] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0126] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A coating system characterized by, The system includes a monitoring component, a host computer (2), an adjustment component (3), and a coating component (4). The monitoring component and the adjustment component (3) are both connected to the host computer (2). The monitoring component can monitor the areal density of the slurry on the electrode surface. The coating component (4) includes a discharge channel (41). The adjustment component (3) can extend into the discharge channel (41) to adjust the coating flow rate. The host computer (2) can automatically analyze the areal density monitoring data of the monitoring component and control the adjustment component (3) to adjust the coating flow rate.

2. The coating system of claim 1, wherein, The coating assembly (4) includes a coating die head, which includes an upper template (431) and a middle template (432). The upper template (431) is disposed on the middle template (432). A first partition (44) is provided between the upper template (431) and the middle template (432). At least one discharge channel (41) is provided on the first partition (44). A discharge port is provided on the discharge side of the first partition (44), and the discharge port is connected to the discharge channel (41).

3. The coating system of claim 2, wherein, The adjustment component (3) includes a drive unit and a flow regulator (32). The drive unit is disposed on the upper template (431), and the flow regulator (32) is disposed on the drive end of the drive unit. The drive unit can drive the flow regulator (32) to extend into the discharge channel (41) to adjust the paint flow rate. The drive unit is communicatively connected to the host computer (2).

4. The coating system of claim 2, wherein, The first interval (44) includes a back interval section (441) and side interval sections (442) disposed on both sides of the back interval section (441). A first clearance groove (443) is provided on the side interval section (442), and the first clearance groove (443) corresponds to the adjustment component (3).

5. The coating system of claim 4, wherein, The first interval (44) is provided with a plurality of discharge channels (41), the plurality of discharge channels (41) are arranged side by side at intervals along the length direction of the first interval (44), a partition section (444) is provided between two adjacent discharge channels (41), the partition section (444) is provided on the back partition section (441) and extends in the discharge direction, and a second clearance groove (445) is provided on the partition section (444).

6. The coating system of claim 3, wherein, The adjustment component (3) includes a flow regulator (32), the upper template (431) has an installation channel (434), the installation channel (434) is connected to the discharge channel (41), and the flow regulator (32) is movably disposed in the installation channel (434).

7. The coating system of claim 6, wherein, The installation channel (434) extends along the length of the upper template (431), and multiple adjustment components (3) are arranged side by side along the extension direction of the installation channel (434).

8. The coating system of claim 2, wherein, The coating die head also includes a lower template (433), which is disposed below the middle template (432). A second partition (438) is provided between the middle template (432) and the lower template (433). The second partition (438) is provided with the discharge channel (41) and the discharge port corresponding to the first partition (44).

9. The coating system of claim 1, wherein, The coating system also includes an unwinding assembly (5), a back roller assembly (6), a roller passing assembly, an oven assembly, and a winding assembly (9). The unwinding assembly (5), the back roller assembly (6), the coating assembly (4), the roller passing assembly, the oven assembly, the monitoring assembly, and the winding assembly (9) are arranged in the electrode conveying direction.

10. The coating system of claim 6, wherein, The adjustment component (3) also includes a mounting base (33) disposed on the upper template (431), and the drive unit is mounted on the mounting base (33) and located directly above the mounting channel (434).

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